model_brush.c

   1 /*
   2 Copyright (C) 1996-1997 Id Software, Inc.
   3
   4 This program is free software; you can redistribute it and/or
   5 modify it under the terms of the GNU General Public License
   6 as published by the Free Software Foundation; either version 2
   7 of the License, or (at your option) any later version.
   8
   9 This program is distributed in the hope that it will be useful,
  10 but WITHOUT ANY WARRANTY; without even the implied warranty of
  11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
  12
  13 See the GNU General Public License for more details.
  14
  15 You should have received a copy of the GNU General Public License
  16 along with this program; if not, write to the Free Software
  17 Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
  18
  19 */
  20
  21 #include "quakedef.h"
  22 #include "image.h"
  23 #include "r_shadow.h"
  24 #include "polygon.h"
  25 #include "curves.h"
  26 #include "wad.h"
  27
  28
  29 //cvar_t r_subdivide_size = {CVAR_SAVE, "r_subdivide_size", "128", "how large water polygons should be (smaller values produce more polygons which give better warping effects)"};
  30 cvar_t mod_bsp_portalize = {0, "mod_bsp_portalize", "1", "enables portal generation from BSP tree (may take several seconds per map), used by r_drawportals, r_useportalculling, r_shadow_realtime_world_compileportalculling, sv_cullentities_portal"};
  31 cvar_t r_novis = {0, "r_novis", "0", "draws whole level, see also sv_cullentities_pvs 0"};
  32 cvar_t r_nosurftextures = {0, "r_nosurftextures", "0", "pretends there was no texture lump found in the q1bsp/hlbsp loading (useful for debugging this rare case)"};
  33 cvar_t r_subdivisions_tolerance = {0, "r_subdivisions_tolerance", "4", "maximum error tolerance on curve subdivision for rendering purposes (in other words, the curves will be given as many polygons as necessary to represent curves at this quality)"};
  34 cvar_t r_subdivisions_mintess = {0, "r_subdivisions_mintess", "0", "minimum number of subdivisions (values above 0 will smooth curves that don't need it)"};
  35 cvar_t r_subdivisions_maxtess = {0, "r_subdivisions_maxtess", "1024", "maximum number of subdivisions (prevents curves beyond a certain detail level, limits smoothing)"};
  36 cvar_t r_subdivisions_maxvertices = {0, "r_subdivisions_maxvertices", "65536", "maximum vertices allowed per subdivided curve"};
  37 cvar_t r_subdivisions_collision_tolerance = {0, "r_subdivisions_collision_tolerance", "15", "maximum error tolerance on curve subdivision for collision purposes (usually a larger error tolerance than for rendering)"};
  38 cvar_t r_subdivisions_collision_mintess = {0, "r_subdivisions_collision_mintess", "0", "minimum number of subdivisions (values above 0 will smooth curves that don't need it)"};
  39 cvar_t r_subdivisions_collision_maxtess = {0, "r_subdivisions_collision_maxtess", "1024", "maximum number of subdivisions (prevents curves beyond a certain detail level, limits smoothing)"};
  40 cvar_t r_subdivisions_collision_maxvertices = {0, "r_subdivisions_collision_maxvertices", "4225", "maximum vertices allowed per subdivided curve"};
  41 cvar_t r_trippy = {0, "r_trippy", "0", "easter egg"};
  42 cvar_t r_fxaa = {CVAR_SAVE, "r_fxaa", "0", "fast approximate anti aliasing"};
  43 cvar_t mod_noshader_default_offsetmapping = {CVAR_SAVE, "mod_noshader_default_offsetmapping", "1", "use offsetmapping by default on all surfaces that are not using q3 shader files"};
  44 cvar_t mod_obj_orientation = {0, "mod_obj_orientation", "1", "fix orientation of OBJ models to the usual conventions (if zero, use coordinates as is)"};
  45 cvar_t mod_q3bsp_curves_collisions = {0, "mod_q3bsp_curves_collisions", "1", "enables collisions with curves (SLOW)"};
  46 cvar_t mod_q3bsp_curves_collisions_stride = {0, "mod_q3bsp_curves_collisions_stride", "16", "collisions against curves: optimize performance by doing a combined collision check for this triangle amount first (-1 avoids any box tests)"};
  47 cvar_t mod_q3bsp_curves_stride = {0, "mod_q3bsp_curves_stride", "16", "particle effect collisions against curves: optimize performance by doing a combined collision check for this triangle amount first (-1 avoids any box tests)"};
  48 cvar_t mod_q3bsp_optimizedtraceline = {0, "mod_q3bsp_optimizedtraceline", "1", "whether to use optimized traceline code for line traces (as opposed to tracebox code)"};
  49 cvar_t mod_q3bsp_debugtracebrush = {0, "mod_q3bsp_debugtracebrush", "0", "selects different tracebrush bsp recursion algorithms (for debugging purposes only)"};
  50 cvar_t mod_q3bsp_lightmapmergepower = {CVAR_SAVE, "mod_q3bsp_lightmapmergepower", "4", "merges the quake3 128x128 lightmap textures into larger lightmap group textures to speed up rendering, 1 = 256x256, 2 = 512x512, 3 = 1024x1024, 4 = 2048x2048, 5 = 4096x4096, ..."};
  51 cvar_t mod_q3bsp_nolightmaps = {CVAR_SAVE, "mod_q3bsp_nolightmaps", "0", "do not load lightmaps in Q3BSP maps (to save video RAM, but be warned: it looks ugly)"};
  52 cvar_t mod_q3bsp_tracelineofsight_brushes = {0, "mod_q3bsp_tracelineofsight_brushes", "0", "enables culling of entities behind detail brushes, curves, etc"};
  53 cvar_t mod_q3bsp_sRGBlightmaps = {0, "mod_q3bsp_sRGBlightmaps", "0", "treat lightmaps from Q3 maps as sRGB when vid_sRGB is active"};
  54 cvar_t mod_q3shader_default_offsetmapping = {CVAR_SAVE, "mod_q3shader_default_offsetmapping", "1", "use offsetmapping by default on all surfaces that are using q3 shader files"};
  55 cvar_t mod_q3shader_default_offsetmapping_scale = {CVAR_SAVE, "mod_q3shader_default_offsetmapping_scale", "1", "default scale used for offsetmapping"};
  56 cvar_t mod_q3shader_default_offsetmapping_bias = {CVAR_SAVE, "mod_q3shader_default_offsetmapping_bias", "0", "default bias used for offsetmapping"};
  57 cvar_t mod_q3shader_default_polygonfactor = {0, "mod_q3shader_default_polygonfactor", "0", "biases depth values of 'polygonoffset' shaders to prevent z-fighting artifacts"};
  58 cvar_t mod_q3shader_default_polygonoffset = {0, "mod_q3shader_default_polygonoffset", "-2", "biases depth values of 'polygonoffset' shaders to prevent z-fighting artifacts"};
  59 cvar_t mod_q3shader_force_addalpha = {0, "mod_q3shader_force_addalpha", "0", "treat GL_ONE GL_ONE (or add) blendfunc as GL_SRC_ALPHA GL_ONE for compatibility with older DarkPlaces releases"};
  60 cvar_t mod_q3shader_force_terrain_alphaflag = {0, "mod_q3shader_force_terrain_alphaflag", "0", "for multilayered terrain shaders force TEXF_ALPHA flag on both layers"};
  61
  62 cvar_t mod_q1bsp_polygoncollisions = {0, "mod_q1bsp_polygoncollisions", "0", "disables use of precomputed cliphulls and instead collides with polygons (uses Bounding Interval Hierarchy optimizations)"};
  63 cvar_t mod_collision_bih = {0, "mod_collision_bih", "1", "enables use of generated Bounding Interval Hierarchy tree instead of compiled bsp tree in collision code"};
  64 cvar_t mod_recalculatenodeboxes = {0, "mod_recalculatenodeboxes", "1", "enables use of generated node bounding boxes based on BSP tree portal reconstruction, rather than the node boxes supplied by the map compiler"};
  65
  66 static texture_t mod_q1bsp_texture_solid;
  67 static texture_t mod_q1bsp_texture_sky;
  68 static texture_t mod_q1bsp_texture_lava;
  69 static texture_t mod_q1bsp_texture_slime;
  70 static texture_t mod_q1bsp_texture_water;
  71
  72 static qboolean Mod_Q3BSP_TraceLineOfSight(struct model_s *model, const vec3_t start, const vec3_t end);
  73
  74 void Mod_BrushInit(void)
  75 {
  76 //      Cvar_RegisterVariable(&r_subdivide_size);
  77         Cvar_RegisterVariable(&mod_bsp_portalize);
  78         Cvar_RegisterVariable(&r_novis);
  79         Cvar_RegisterVariable(&r_nosurftextures);
  80         Cvar_RegisterVariable(&r_subdivisions_tolerance);
  81         Cvar_RegisterVariable(&r_subdivisions_mintess);
  82         Cvar_RegisterVariable(&r_subdivisions_maxtess);
  83         Cvar_RegisterVariable(&r_subdivisions_maxvertices);
  84         Cvar_RegisterVariable(&r_subdivisions_collision_tolerance);
  85         Cvar_RegisterVariable(&r_subdivisions_collision_mintess);
  86         Cvar_RegisterVariable(&r_subdivisions_collision_maxtess);
  87         Cvar_RegisterVariable(&r_subdivisions_collision_maxvertices);
  88         Cvar_RegisterVariable(&r_trippy);
  89         Cvar_RegisterVariable(&r_fxaa);
  90         Cvar_RegisterVariable(&mod_noshader_default_offsetmapping);
  91         Cvar_RegisterVariable(&mod_obj_orientation);
  92         Cvar_RegisterVariable(&mod_q3bsp_curves_collisions);
  93         Cvar_RegisterVariable(&mod_q3bsp_curves_collisions_stride);
  94         Cvar_RegisterVariable(&mod_q3bsp_curves_stride);
  95         Cvar_RegisterVariable(&mod_q3bsp_optimizedtraceline);
  96         Cvar_RegisterVariable(&mod_q3bsp_debugtracebrush);
  97         Cvar_RegisterVariable(&mod_q3bsp_lightmapmergepower);
  98         Cvar_RegisterVariable(&mod_q3bsp_nolightmaps);
  99         Cvar_RegisterVariable(&mod_q3bsp_sRGBlightmaps);
 100         Cvar_RegisterVariable(&mod_q3bsp_tracelineofsight_brushes);
 101         Cvar_RegisterVariable(&mod_q3shader_default_offsetmapping);
 102         Cvar_RegisterVariable(&mod_q3shader_default_offsetmapping_scale);
 103         Cvar_RegisterVariable(&mod_q3shader_default_offsetmapping_bias);
 104         Cvar_RegisterVariable(&mod_q3shader_default_polygonfactor);
 105         Cvar_RegisterVariable(&mod_q3shader_default_polygonoffset);
 106         Cvar_RegisterVariable(&mod_q3shader_force_addalpha);
 107         Cvar_RegisterVariable(&mod_q3shader_force_terrain_alphaflag);
 108         Cvar_RegisterVariable(&mod_q1bsp_polygoncollisions);
 109         Cvar_RegisterVariable(&mod_collision_bih);
 110         Cvar_RegisterVariable(&mod_recalculatenodeboxes);
 111
 112         // these games were made for older DP engines and are no longer
 113         // maintained; use this hack to show their textures properly
 114         if(gamemode == GAME_NEXUIZ)
 115                 Cvar_SetQuick(&mod_q3shader_force_addalpha, "1");
 116
 117         memset(&mod_q1bsp_texture_solid, 0, sizeof(mod_q1bsp_texture_solid));
 118         strlcpy(mod_q1bsp_texture_solid.name, "solid" , sizeof(mod_q1bsp_texture_solid.name));
 119         mod_q1bsp_texture_solid.surfaceflags = 0;
 120         mod_q1bsp_texture_solid.supercontents = SUPERCONTENTS_SOLID;
 121
 122         mod_q1bsp_texture_sky = mod_q1bsp_texture_solid;
 123         strlcpy(mod_q1bsp_texture_sky.name, "sky", sizeof(mod_q1bsp_texture_sky.name));
 124         mod_q1bsp_texture_sky.surfaceflags = Q3SURFACEFLAG_SKY | Q3SURFACEFLAG_NOIMPACT | Q3SURFACEFLAG_NOMARKS | Q3SURFACEFLAG_NODLIGHT | Q3SURFACEFLAG_NOLIGHTMAP;
 125         mod_q1bsp_texture_sky.supercontents = SUPERCONTENTS_SKY | SUPERCONTENTS_NODROP;
 126
 127         mod_q1bsp_texture_lava = mod_q1bsp_texture_solid;
 128         strlcpy(mod_q1bsp_texture_lava.name, "*lava", sizeof(mod_q1bsp_texture_lava.name));
 129         mod_q1bsp_texture_lava.surfaceflags = Q3SURFACEFLAG_NOMARKS;
 130         mod_q1bsp_texture_lava.supercontents = SUPERCONTENTS_LAVA | SUPERCONTENTS_NODROP;
 131
 132         mod_q1bsp_texture_slime = mod_q1bsp_texture_solid;
 133         strlcpy(mod_q1bsp_texture_slime.name, "*slime", sizeof(mod_q1bsp_texture_slime.name));
 134         mod_q1bsp_texture_slime.surfaceflags = Q3SURFACEFLAG_NOMARKS;
 135         mod_q1bsp_texture_slime.supercontents = SUPERCONTENTS_SLIME;
 136
 137         mod_q1bsp_texture_water = mod_q1bsp_texture_solid;
 138         strlcpy(mod_q1bsp_texture_water.name, "*water", sizeof(mod_q1bsp_texture_water.name));
 139         mod_q1bsp_texture_water.surfaceflags = Q3SURFACEFLAG_NOMARKS;
 140         mod_q1bsp_texture_water.supercontents = SUPERCONTENTS_WATER;
 141 }
 142
 143 static mleaf_t *Mod_Q1BSP_PointInLeaf(dp_model_t *model, const vec3_t p)
 144 {
 145         mnode_t *node;
 146
 147         if (model == NULL)
 148                 return NULL;
 149
 150         // LordHavoc: modified to start at first clip node,
 151         // in other words: first node of the (sub)model
 152         node = model->brush.data_nodes + model->brushq1.hulls[0].firstclipnode;
 153         while (node->plane)
 154                 node = node->children[(node->plane->type < 3 ? p[node->plane->type] : DotProduct(p,node->plane->normal)) < node->plane->dist];
 155
 156         return (mleaf_t *)node;
 157 }
 158
 159 static void Mod_Q1BSP_AmbientSoundLevelsForPoint(dp_model_t *model, const vec3_t p, unsigned char *out, int outsize)
 160 {
 161         int i;
 162         mleaf_t *leaf;
 163         leaf = Mod_Q1BSP_PointInLeaf(model, p);
 164         if (leaf)
 165         {
 166                 i = min(outsize, (int)sizeof(leaf->ambient_sound_level));
 167                 if (i)
 168                 {
 169                         memcpy(out, leaf->ambient_sound_level, i);
 170                         out += i;
 171                         outsize -= i;
 172                 }
 173         }
 174         if (outsize)
 175                 memset(out, 0, outsize);
 176 }
 177
 178 static int Mod_Q1BSP_FindBoxClusters(dp_model_t *model, const vec3_t mins, const vec3_t maxs, int maxclusters, int *clusterlist)
 179 {
 180         int numclusters = 0;
 181         int nodestackindex = 0;
 182         mnode_t *node, *nodestack[1024];
 183         if (!model->brush.num_pvsclusters)
 184                 return -1;
 185         node = model->brush.data_nodes + model->brushq1.hulls[0].firstclipnode;
 186         for (;;)
 187         {
 188 #if 1
 189                 if (node->plane)
 190                 {
 191                         // node - recurse down the BSP tree
 192                         int sides = BoxOnPlaneSide(mins, maxs, node->plane);
 193                         if (sides < 3)
 194                         {
 195                                 if (sides == 0)
 196                                         return -1; // ERROR: NAN bounding box!
 197                                 // box is on one side of plane, take that path
 198                                 node = node->children[sides-1];
 199                         }
 200                         else
 201                         {
 202                                 // box crosses plane, take one path and remember the other
 203                                 if (nodestackindex < 1024)
 204                                         nodestack[nodestackindex++] = node->children[0];
 205                                 node = node->children[1];
 206                         }
 207                         continue;
 208                 }
 209                 else
 210                 {
 211                         // leaf - add clusterindex to list
 212                         if (numclusters < maxclusters)
 213                                 clusterlist[numclusters] = ((mleaf_t *)node)->clusterindex;
 214                         numclusters++;
 215                 }
 216 #else
 217                 if (BoxesOverlap(mins, maxs, node->mins, node->maxs))
 218                 {
 219                         if (node->plane)
 220                         {
 221                                 if (nodestackindex < 1024)
 222                                         nodestack[nodestackindex++] = node->children[0];
 223                                 node = node->children[1];
 224                                 continue;
 225                         }
 226                         else
 227                         {
 228                                 // leaf - add clusterindex to list
 229                                 if (numclusters < maxclusters)
 230                                         clusterlist[numclusters] = ((mleaf_t *)node)->clusterindex;
 231                                 numclusters++;
 232                         }
 233                 }
 234 #endif
 235                 // try another path we didn't take earlier
 236                 if (nodestackindex == 0)
 237                         break;
 238                 node = nodestack[--nodestackindex];
 239         }
 240         // return number of clusters found (even if more than the maxclusters)
 241         return numclusters;
 242 }
 243
 244 static int Mod_Q1BSP_BoxTouchingPVS(dp_model_t *model, const unsigned char *pvs, const vec3_t mins, const vec3_t maxs)
 245 {
 246         int nodestackindex = 0;
 247         mnode_t *node, *nodestack[1024];
 248         if (!model->brush.num_pvsclusters)
 249                 return true;
 250         node = model->brush.data_nodes + model->brushq1.hulls[0].firstclipnode;
 251         for (;;)
 252         {
 253 #if 1
 254                 if (node->plane)
 255                 {
 256                         // node - recurse down the BSP tree
 257                         int sides = BoxOnPlaneSide(mins, maxs, node->plane);
 258                         if (sides < 3)
 259                         {
 260                                 if (sides == 0)
 261                                         return -1; // ERROR: NAN bounding box!
 262                                 // box is on one side of plane, take that path
 263                                 node = node->children[sides-1];
 264                         }
 265                         else
 266                         {
 267                                 // box crosses plane, take one path and remember the other
 268                                 if (nodestackindex < 1024)
 269                                         nodestack[nodestackindex++] = node->children[0];
 270                                 node = node->children[1];
 271                         }
 272                         continue;
 273                 }
 274                 else
 275                 {
 276                         // leaf - check cluster bit
 277                         int clusterindex = ((mleaf_t *)node)->clusterindex;
 278                         if (CHECKPVSBIT(pvs, clusterindex))
 279                         {
 280                                 // it is visible, return immediately with the news
 281                                 return true;
 282                         }
 283                 }
 284 #else
 285                 if (BoxesOverlap(mins, maxs, node->mins, node->maxs))
 286                 {
 287                         if (node->plane)
 288                         {
 289                                 if (nodestackindex < 1024)
 290                                         nodestack[nodestackindex++] = node->children[0];
 291                                 node = node->children[1];
 292                                 continue;
 293                         }
 294                         else
 295                         {
 296                                 // leaf - check cluster bit
 297                                 int clusterindex = ((mleaf_t *)node)->clusterindex;
 298                                 if (CHECKPVSBIT(pvs, clusterindex))
 299                                 {
 300                                         // it is visible, return immediately with the news
 301                                         return true;
 302                                 }
 303                         }
 304                 }
 305 #endif
 306                 // nothing to see here, try another path we didn't take earlier
 307                 if (nodestackindex == 0)
 308                         break;
 309                 node = nodestack[--nodestackindex];
 310         }
 311         // it is not visible
 312         return false;
 313 }
 314
 315 static int Mod_Q1BSP_BoxTouchingLeafPVS(dp_model_t *model, const unsigned char *pvs, const vec3_t mins, const vec3_t maxs)
 316 {
 317         int nodestackindex = 0;
 318         mnode_t *node, *nodestack[1024];
 319         if (!model->brush.num_leafs)
 320                 return true;
 321         node = model->brush.data_nodes + model->brushq1.hulls[0].firstclipnode;
 322         for (;;)
 323         {
 324 #if 1
 325                 if (node->plane)
 326                 {
 327                         // node - recurse down the BSP tree
 328                         int sides = BoxOnPlaneSide(mins, maxs, node->plane);
 329                         if (sides < 3)
 330                         {
 331                                 if (sides == 0)
 332                                         return -1; // ERROR: NAN bounding box!
 333                                 // box is on one side of plane, take that path
 334                                 node = node->children[sides-1];
 335                         }
 336                         else
 337                         {
 338                                 // box crosses plane, take one path and remember the other
 339                                 if (nodestackindex < 1024)
 340                                         nodestack[nodestackindex++] = node->children[0];
 341                                 node = node->children[1];
 342                         }
 343                         continue;
 344                 }
 345                 else
 346                 {
 347                         // leaf - check cluster bit
 348                         int clusterindex = ((mleaf_t *)node) - model->brush.data_leafs;
 349                         if (CHECKPVSBIT(pvs, clusterindex))
 350                         {
 351                                 // it is visible, return immediately with the news
 352                                 return true;
 353                         }
 354                 }
 355 #else
 356                 if (BoxesOverlap(mins, maxs, node->mins, node->maxs))
 357                 {
 358                         if (node->plane)
 359                         {
 360                                 if (nodestackindex < 1024)
 361                                         nodestack[nodestackindex++] = node->children[0];
 362                                 node = node->children[1];
 363                                 continue;
 364                         }
 365                         else
 366                         {
 367                                 // leaf - check cluster bit
 368                                 int clusterindex = ((mleaf_t *)node) - model->brush.data_leafs;
 369                                 if (CHECKPVSBIT(pvs, clusterindex))
 370                                 {
 371                                         // it is visible, return immediately with the news
 372                                         return true;
 373                                 }
 374                         }
 375                 }
 376 #endif
 377                 // nothing to see here, try another path we didn't take earlier
 378                 if (nodestackindex == 0)
 379                         break;
 380                 node = nodestack[--nodestackindex];
 381         }
 382         // it is not visible
 383         return false;
 384 }
 385
 386 static int Mod_Q1BSP_BoxTouchingVisibleLeafs(dp_model_t *model, const unsigned char *visibleleafs, const vec3_t mins, const vec3_t maxs)
 387 {
 388         int nodestackindex = 0;
 389         mnode_t *node, *nodestack[1024];
 390         if (!model->brush.num_leafs)
 391                 return true;
 392         node = model->brush.data_nodes + model->brushq1.hulls[0].firstclipnode;
 393         for (;;)
 394         {
 395 #if 1
 396                 if (node->plane)
 397                 {
 398                         // node - recurse down the BSP tree
 399                         int sides = BoxOnPlaneSide(mins, maxs, node->plane);
 400                         if (sides < 3)
 401                         {
 402                                 if (sides == 0)
 403                                         return -1; // ERROR: NAN bounding box!
 404                                 // box is on one side of plane, take that path
 405                                 node = node->children[sides-1];
 406                         }
 407                         else
 408                         {
 409                                 // box crosses plane, take one path and remember the other
 410                                 if (nodestackindex < 1024)
 411                                         nodestack[nodestackindex++] = node->children[0];
 412                                 node = node->children[1];
 413                         }
 414                         continue;
 415                 }
 416                 else
 417                 {
 418                         // leaf - check if it is visible
 419                         if (visibleleafs[(mleaf_t *)node - model->brush.data_leafs])
 420                         {
 421                                 // it is visible, return immediately with the news
 422                                 return true;
 423                         }
 424                 }
 425 #else
 426                 if (BoxesOverlap(mins, maxs, node->mins, node->maxs))
 427                 {
 428                         if (node->plane)
 429                         {
 430                                 if (nodestackindex < 1024)
 431                                         nodestack[nodestackindex++] = node->children[0];
 432                                 node = node->children[1];
 433                                 continue;
 434                         }
 435                         else
 436                         {
 437                                 // leaf - check if it is visible
 438                                 if (visibleleafs[(mleaf_t *)node - model->brush.data_leafs])
 439                                 {
 440                                         // it is visible, return immediately with the news
 441                                         return true;
 442                                 }
 443                         }
 444                 }
 445 #endif
 446                 // nothing to see here, try another path we didn't take earlier
 447                 if (nodestackindex == 0)
 448                         break;
 449                 node = nodestack[--nodestackindex];
 450         }
 451         // it is not visible
 452         return false;
 453 }
 454
 455 typedef struct findnonsolidlocationinfo_s
 456 {
 457         vec3_t center;
 458         vec3_t absmin, absmax;
 459         vec_t radius;
 460         vec3_t nudge;
 461         vec_t bestdist;
 462         dp_model_t *model;
 463 }
 464 findnonsolidlocationinfo_t;
 465
 466 static void Mod_Q1BSP_FindNonSolidLocation_r_Triangle(findnonsolidlocationinfo_t *info, msurface_t *surface, int k)
 467 {
 468         int i, *tri;
 469         float dist, f, vert[3][3], edge[3][3], facenormal[3], edgenormal[3][3], point[3];
 470
 471         tri = (info->model->surfmesh.data_element3i + 3 * surface->num_firsttriangle) + k * 3;
 472         VectorCopy((info->model->surfmesh.data_vertex3f + tri[0] * 3), vert[0]);
 473         VectorCopy((info->model->surfmesh.data_vertex3f + tri[1] * 3), vert[1]);
 474         VectorCopy((info->model->surfmesh.data_vertex3f + tri[2] * 3), vert[2]);
 475         VectorSubtract(vert[1], vert[0], edge[0]);
 476         VectorSubtract(vert[2], vert[1], edge[1]);
 477         CrossProduct(edge[1], edge[0], facenormal);
 478         if (facenormal[0] || facenormal[1] || facenormal[2])
 479         {
 480                 VectorNormalize(facenormal);
 481                 f = DotProduct(info->center, facenormal) - DotProduct(vert[0], facenormal);
 482                 if (f <= info->bestdist && f >= -info->bestdist)
 483                 {
 484                         VectorSubtract(vert[0], vert[2], edge[2]);
 485                         VectorNormalize(edge[0]);
 486                         VectorNormalize(edge[1]);
 487                         VectorNormalize(edge[2]);
 488                         CrossProduct(facenormal, edge[0], edgenormal[0]);
 489                         CrossProduct(facenormal, edge[1], edgenormal[1]);
 490                         CrossProduct(facenormal, edge[2], edgenormal[2]);
 491                         // face distance
 492                         if (DotProduct(info->center, edgenormal[0]) < DotProduct(vert[0], edgenormal[0])
 493                                         && DotProduct(info->center, edgenormal[1]) < DotProduct(vert[1], edgenormal[1])
 494                                         && DotProduct(info->center, edgenormal[2]) < DotProduct(vert[2], edgenormal[2]))
 495                         {
 496                                 // we got lucky, the center is within the face
 497                                 dist = DotProduct(info->center, facenormal) - DotProduct(vert[0], facenormal);
 498                                 if (dist < 0)
 499                                 {
 500                                         dist = -dist;
 501                                         if (info->bestdist > dist)
 502                                         {
 503                                                 info->bestdist = dist;
 504                                                 VectorScale(facenormal, (info->radius - -dist), info->nudge);
 505                                         }
 506                                 }
 507                                 else
 508                                 {
 509                                         if (info->bestdist > dist)
 510                                         {
 511                                                 info->bestdist = dist;
 512                                                 VectorScale(facenormal, (info->radius - dist), info->nudge);
 513                                         }
 514                                 }
 515                         }
 516                         else
 517                         {
 518                                 // check which edge or vertex the center is nearest
 519                                 for (i = 0;i < 3;i++)
 520                                 {
 521                                         f = DotProduct(info->center, edge[i]);
 522                                         if (f >= DotProduct(vert[0], edge[i])
 523                                                         && f <= DotProduct(vert[1], edge[i]))
 524                                         {
 525                                                 // on edge
 526                                                 VectorMA(info->center, -f, edge[i], point);
 527                                                 dist = sqrt(DotProduct(point, point));
 528                                                 if (info->bestdist > dist)
 529                                                 {
 530                                                         info->bestdist = dist;
 531                                                         VectorScale(point, (info->radius / dist), info->nudge);
 532                                                 }
 533                                                 // skip both vertex checks
 534                                                 // (both are further away than this edge)
 535                                                 i++;
 536                                         }
 537                                         else
 538                                         {
 539                                                 // not on edge, check first vertex of edge
 540                                                 VectorSubtract(info->center, vert[i], point);
 541                                                 dist = sqrt(DotProduct(point, point));
 542                                                 if (info->bestdist > dist)
 543                                                 {
 544                                                         info->bestdist = dist;
 545                                                         VectorScale(point, (info->radius / dist), info->nudge);
 546                                                 }
 547                                         }
 548                                 }
 549                         }
 550                 }
 551         }
 552 }
 553
 554 static void Mod_Q1BSP_FindNonSolidLocation_r_Leaf(findnonsolidlocationinfo_t *info, mleaf_t *leaf)
 555 {
 556         int surfacenum, k, *mark;
 557         msurface_t *surface;
 558         for (surfacenum = 0, mark = leaf->firstleafsurface;surfacenum < leaf->numleafsurfaces;surfacenum++, mark++)
 559         {
 560                 surface = info->model->data_surfaces + *mark;
 561                 if (surface->texture->supercontents & SUPERCONTENTS_SOLID)
 562                 {
 563                         if(surface->deprecatedq3num_bboxstride > 0)
 564                         {
 565                                 int i, cnt, tri;
 566                                 cnt = (surface->num_triangles + surface->deprecatedq3num_bboxstride - 1) / surface->deprecatedq3num_bboxstride;
 567                                 for(i = 0; i < cnt; ++i)
 568                                 {
 569                                         if(BoxesOverlap(surface->deprecatedq3data_bbox6f + i * 6, surface->deprecatedq3data_bbox6f + i * 6 + 3, info->absmin, info->absmax))
 570                                         {
 571                                                 for(k = 0; k < surface->deprecatedq3num_bboxstride; ++k)
 572                                                 {
 573                                                         tri = i * surface->deprecatedq3num_bboxstride + k;
 574                                                         if(tri >= surface->num_triangles)
 575                                                                 break;
 576                                                         Mod_Q1BSP_FindNonSolidLocation_r_Triangle(info, surface, tri);
 577                                                 }
 578                                         }
 579                                 }
 580                         }
 581                         else
 582                         {
 583                                 for (k = 0;k < surface->num_triangles;k++)
 584                                 {
 585                                         Mod_Q1BSP_FindNonSolidLocation_r_Triangle(info, surface, k);
 586                                 }
 587                         }
 588                 }
 589         }
 590 }
 591
 592 static void Mod_Q1BSP_FindNonSolidLocation_r(findnonsolidlocationinfo_t *info, mnode_t *node)
 593 {
 594         if (node->plane)
 595         {
 596                 float f = PlaneDiff(info->center, node->plane);
 597                 if (f >= -info->bestdist)
 598                         Mod_Q1BSP_FindNonSolidLocation_r(info, node->children[0]);
 599                 if (f <= info->bestdist)
 600                         Mod_Q1BSP_FindNonSolidLocation_r(info, node->children[1]);
 601         }
 602         else
 603         {
 604                 if (((mleaf_t *)node)->numleafsurfaces)
 605                         Mod_Q1BSP_FindNonSolidLocation_r_Leaf(info, (mleaf_t *)node);
 606         }
 607 }
 608
 609 static void Mod_Q1BSP_FindNonSolidLocation(dp_model_t *model, const vec3_t in, vec3_t out, float radius)
 610 {
 611         int i;
 612         findnonsolidlocationinfo_t info;
 613         if (model == NULL)
 614         {
 615                 VectorCopy(in, out);
 616                 return;
 617         }
 618         VectorCopy(in, info.center);
 619         info.radius = radius;
 620         info.model = model;
 621         i = 0;
 622         do
 623         {
 624                 VectorClear(info.nudge);
 625                 info.bestdist = radius;
 626                 VectorCopy(info.center, info.absmin);
 627                 VectorCopy(info.center, info.absmax);
 628                 info.absmin[0] -= info.radius + 1;
 629                 info.absmin[1] -= info.radius + 1;
 630                 info.absmin[2] -= info.radius + 1;
 631                 info.absmax[0] += info.radius + 1;
 632                 info.absmax[1] += info.radius + 1;
 633                 info.absmax[2] += info.radius + 1;
 634                 Mod_Q1BSP_FindNonSolidLocation_r(&info, model->brush.data_nodes + model->brushq1.hulls[0].firstclipnode);
 635                 VectorAdd(info.center, info.nudge, info.center);
 636         }
 637         while (info.bestdist < radius && ++i < 10);
 638         VectorCopy(info.center, out);
 639 }
 640
 641 int Mod_Q1BSP_SuperContentsFromNativeContents(dp_model_t *model, int nativecontents)
 642 {
 643         switch(nativecontents)
 644         {
 645                 case CONTENTS_EMPTY:
 646                         return 0;
 647                 case CONTENTS_SOLID:
 648                         return SUPERCONTENTS_SOLID | SUPERCONTENTS_OPAQUE;
 649                 case CONTENTS_WATER:
 650                         return SUPERCONTENTS_WATER;
 651                 case CONTENTS_SLIME:
 652                         return SUPERCONTENTS_SLIME;
 653                 case CONTENTS_LAVA:
 654                         return SUPERCONTENTS_LAVA | SUPERCONTENTS_NODROP;
 655                 case CONTENTS_SKY:
 656                         return SUPERCONTENTS_SKY | SUPERCONTENTS_NODROP | SUPERCONTENTS_OPAQUE; // to match behaviour of Q3 maps, let sky count as opaque
 657         }
 658         return 0;
 659 }
 660
 661 int Mod_Q1BSP_NativeContentsFromSuperContents(dp_model_t *model, int supercontents)
 662 {
 663         if (supercontents & (SUPERCONTENTS_SOLID | SUPERCONTENTS_BODY))
 664                 return CONTENTS_SOLID;
 665         if (supercontents & SUPERCONTENTS_SKY)
 666                 return CONTENTS_SKY;
 667         if (supercontents & SUPERCONTENTS_LAVA)
 668                 return CONTENTS_LAVA;
 669         if (supercontents & SUPERCONTENTS_SLIME)
 670                 return CONTENTS_SLIME;
 671         if (supercontents & SUPERCONTENTS_WATER)
 672                 return CONTENTS_WATER;
 673         return CONTENTS_EMPTY;
 674 }
 675
 676 typedef struct RecursiveHullCheckTraceInfo_s
 677 {
 678         // the hull we're tracing through
 679         const hull_t *hull;
 680
 681         // the trace structure to fill in
 682         trace_t *trace;
 683
 684         // start, end, and end - start (in model space)
 685         double start[3];
 686         double end[3];
 687         double dist[3];
 688 }
 689 RecursiveHullCheckTraceInfo_t;
 690
 691 // 1/32 epsilon to keep floating point happy
 692 #define DIST_EPSILON (0.03125)
 693
 694 #define HULLCHECKSTATE_EMPTY 0
 695 #define HULLCHECKSTATE_SOLID 1
 696 #define HULLCHECKSTATE_DONE 2
 697
 698 static int Mod_Q1BSP_RecursiveHullCheck(RecursiveHullCheckTraceInfo_t *t, int num, double p1f, double p2f, double p1[3], double p2[3])
 699 {
 700         // status variables, these don't need to be saved on the stack when
 701         // recursing...  but are because this should be thread-safe
 702         // (note: tracing against a bbox is not thread-safe, yet)
 703         int ret;
 704         mplane_t *plane;
 705         double t1, t2;
 706
 707         // variables that need to be stored on the stack when recursing
 708         mclipnode_t *node;
 709         int p1side, p2side;
 710         double midf, mid[3];
 711
 712         // keep looping until we hit a leaf
 713         while (num >= 0)
 714         {
 715                 // find the point distances
 716                 node = t->hull->clipnodes + num;
 717                 plane = t->hull->planes + node->planenum;
 718
 719                 // axial planes can be calculated more quickly without the DotProduct
 720                 if (plane->type < 3)
 721                 {
 722                         t1 = p1[plane->type] - plane->dist;
 723                         t2 = p2[plane->type] - plane->dist;
 724                 }
 725                 else
 726                 {
 727                         t1 = DotProduct (plane->normal, p1) - plane->dist;
 728                         t2 = DotProduct (plane->normal, p2) - plane->dist;
 729                 }
 730
 731                 // negative plane distances indicate children[1] (behind plane)
 732                 p1side = t1 < 0;
 733                 p2side = t2 < 0;
 734
 735                 // if the line starts and ends on the same side of the plane, recurse
 736                 // into that child instantly
 737                 if (p1side == p2side)
 738                 {
 739 #if COLLISIONPARANOID >= 3
 740                         if (p1side)
 741                                 Con_Print("<");
 742                         else
 743                                 Con_Print(">");
 744 #endif
 745                         // loop back and process the start child
 746                         num = node->children[p1side];
 747                 }
 748                 else
 749                 {
 750                         // find the midpoint where the line crosses the plane, use the
 751                         // original line for best accuracy
 752 #if COLLISIONPARANOID >= 3
 753                         Con_Print("M");
 754 #endif
 755                         if (plane->type < 3)
 756                         {
 757                                 t1 = t->start[plane->type] - plane->dist;
 758                                 t2 = t->end[plane->type] - plane->dist;
 759                         }
 760                         else
 761                         {
 762                                 t1 = DotProduct (plane->normal, t->start) - plane->dist;
 763                                 t2 = DotProduct (plane->normal, t->end) - plane->dist;
 764                         }
 765                         midf = t1 / (t1 - t2);
 766                         midf = bound(p1f, midf, p2f);
 767                         VectorMA(t->start, midf, t->dist, mid);
 768
 769                         // we now have a mid point, essentially splitting the line into
 770                         // the segments in the near child and the far child, we can now
 771                         // recurse those in order and get their results
 772
 773                         // recurse both sides, front side first
 774                         ret = Mod_Q1BSP_RecursiveHullCheck(t, node->children[p1side], p1f, midf, p1, mid);
 775                         // if this side is not empty, return what it is (solid or done)
 776                         if (ret != HULLCHECKSTATE_EMPTY)
 777                                 return ret;
 778
 779                         ret = Mod_Q1BSP_RecursiveHullCheck(t, node->children[p2side], midf, p2f, mid, p2);
 780                         // if other side is not solid, return what it is (empty or done)
 781                         if (ret != HULLCHECKSTATE_SOLID)
 782                                 return ret;
 783
 784                         // front is air and back is solid, this is the impact point...
 785
 786                         // copy the plane information, flipping it if needed
 787                         if (p1side)
 788                         {
 789                                 t->trace->plane.dist = -plane->dist;
 790                                 VectorNegate (plane->normal, t->trace->plane.normal);
 791                         }
 792                         else
 793                         {
 794                                 t->trace->plane.dist = plane->dist;
 795                                 VectorCopy (plane->normal, t->trace->plane.normal);
 796                         }
 797
 798                         // calculate the return fraction which is nudged off the surface a bit
 799                         t1 = DotProduct(t->trace->plane.normal, t->start) - t->trace->plane.dist;
 800                         t2 = DotProduct(t->trace->plane.normal, t->end) - t->trace->plane.dist;
 801                         midf = (t1 - collision_impactnudge.value) / (t1 - t2);
 802                         t->trace->fraction = bound(0, midf, 1);
 803
 804 #if COLLISIONPARANOID >= 3
 805                         Con_Print("D");
 806 #endif
 807                         return HULLCHECKSTATE_DONE;
 808                 }
 809         }
 810
 811         // we reached a leaf contents
 812
 813         // check for empty
 814         num = Mod_Q1BSP_SuperContentsFromNativeContents(NULL, num);
 815         if (!t->trace->startfound)
 816         {
 817                 t->trace->startfound = true;
 818                 t->trace->startsupercontents |= num;
 819         }
 820         if (num & SUPERCONTENTS_LIQUIDSMASK)
 821                 t->trace->inwater = true;
 822         if (num == 0)
 823                 t->trace->inopen = true;
 824         if (num & SUPERCONTENTS_SOLID)
 825                 t->trace->hittexture = &mod_q1bsp_texture_solid;
 826         else if (num & SUPERCONTENTS_SKY)
 827                 t->trace->hittexture = &mod_q1bsp_texture_sky;
 828         else if (num & SUPERCONTENTS_LAVA)
 829                 t->trace->hittexture = &mod_q1bsp_texture_lava;
 830         else if (num & SUPERCONTENTS_SLIME)
 831                 t->trace->hittexture = &mod_q1bsp_texture_slime;
 832         else
 833                 t->trace->hittexture = &mod_q1bsp_texture_water;
 834         t->trace->hitq3surfaceflags = t->trace->hittexture->surfaceflags;
 835         t->trace->hitsupercontents = num;
 836         if (num & t->trace->hitsupercontentsmask)
 837         {
 838                 // if the first leaf is solid, set startsolid
 839                 if (t->trace->allsolid)
 840                         t->trace->startsolid = true;
 841 #if COLLISIONPARANOID >= 3
 842                 Con_Print("S");
 843 #endif
 844                 return HULLCHECKSTATE_SOLID;
 845         }
 846         else
 847         {
 848                 t->trace->allsolid = false;
 849 #if COLLISIONPARANOID >= 3
 850                 Con_Print("E");
 851 #endif
 852                 return HULLCHECKSTATE_EMPTY;
 853         }
 854 }
 855
 856 //#if COLLISIONPARANOID < 2
 857 static int Mod_Q1BSP_RecursiveHullCheckPoint(RecursiveHullCheckTraceInfo_t *t, int num)
 858 {
 859         mplane_t *plane;
 860         mclipnode_t *nodes = t->hull->clipnodes;
 861         mplane_t *planes = t->hull->planes;
 862         vec3_t point;
 863         VectorCopy(t->start, point);
 864         while (num >= 0)
 865         {
 866                 plane = planes + nodes[num].planenum;
 867                 num = nodes[num].children[(plane->type < 3 ? point[plane->type] : DotProduct(plane->normal, point)) < plane->dist];
 868         }
 869         num = Mod_Q1BSP_SuperContentsFromNativeContents(NULL, num);
 870         t->trace->startsupercontents |= num;
 871         if (num & SUPERCONTENTS_LIQUIDSMASK)
 872                 t->trace->inwater = true;
 873         if (num == 0)
 874                 t->trace->inopen = true;
 875         if (num & t->trace->hitsupercontentsmask)
 876         {
 877                 t->trace->allsolid = t->trace->startsolid = true;
 878                 return HULLCHECKSTATE_SOLID;
 879         }
 880         else
 881         {
 882                 t->trace->allsolid = t->trace->startsolid = false;
 883                 return HULLCHECKSTATE_EMPTY;
 884         }
 885 }
 886 //#endif
 887
 888 static void Mod_Q1BSP_TracePoint(struct model_s *model, const frameblend_t *frameblend, const skeleton_t *skeleton, trace_t *trace, const vec3_t start, int hitsupercontentsmask)
 889 {
 890         RecursiveHullCheckTraceInfo_t rhc;
 891
 892         memset(&rhc, 0, sizeof(rhc));
 893         memset(trace, 0, sizeof(trace_t));
 894         rhc.trace = trace;
 895         rhc.trace->fraction = 1;
 896         rhc.trace->allsolid = true;
 897         rhc.hull = &model->brushq1.hulls[0]; // 0x0x0
 898         VectorCopy(start, rhc.start);
 899         VectorCopy(start, rhc.end);
 900         Mod_Q1BSP_RecursiveHullCheckPoint(&rhc, rhc.hull->firstclipnode);
 901 }
 902
 903 static void Mod_Q1BSP_TraceLineAgainstSurfaces(struct model_s *model, const frameblend_t *frameblend, const skeleton_t *skeleton, trace_t *trace, const vec3_t start, const vec3_t end, int hitsupercontentsmask);
 904
 905 static void Mod_Q1BSP_TraceLine(struct model_s *model, const frameblend_t *frameblend, const skeleton_t *skeleton, trace_t *trace, const vec3_t start, const vec3_t end, int hitsupercontentsmask)
 906 {
 907         RecursiveHullCheckTraceInfo_t rhc;
 908
 909         if (VectorCompare(start, end))
 910         {
 911                 Mod_Q1BSP_TracePoint(model, frameblend, skeleton, trace, start, hitsupercontentsmask);
 912                 return;
 913         }
 914
 915         // sometimes we want to traceline against polygons so we can report the texture that was hit rather than merely a contents, but using this method breaks one of negke's maps so it must be a cvar check...
 916         if (sv_gameplayfix_q1bsptracelinereportstexture.integer)
 917         {
 918                 Mod_Q1BSP_TraceLineAgainstSurfaces(model, frameblend, skeleton, trace, start, end, hitsupercontentsmask);
 919                 return;
 920         }
 921
 922         memset(&rhc, 0, sizeof(rhc));
 923         memset(trace, 0, sizeof(trace_t));
 924         rhc.trace = trace;
 925         rhc.trace->hitsupercontentsmask = hitsupercontentsmask;
 926         rhc.trace->fraction = 1;
 927         rhc.trace->allsolid = true;
 928         rhc.hull = &model->brushq1.hulls[0]; // 0x0x0
 929         VectorCopy(start, rhc.start);
 930         VectorCopy(end, rhc.end);
 931         VectorSubtract(rhc.end, rhc.start, rhc.dist);
 932 #if COLLISIONPARANOID >= 2
 933         Con_Printf("t(%f %f %f,%f %f %f)", rhc.start[0], rhc.start[1], rhc.start[2], rhc.end[0], rhc.end[1], rhc.end[2]);
 934         Mod_Q1BSP_RecursiveHullCheck(&rhc, rhc.hull->firstclipnode, 0, 1, rhc.start, rhc.end);
 935         {
 936
 937                 double test[3];
 938                 trace_t testtrace;
 939                 VectorLerp(rhc.start, rhc.trace->fraction, rhc.end, test);
 940                 memset(&testtrace, 0, sizeof(trace_t));
 941                 rhc.trace = &testtrace;
 942                 rhc.trace->hitsupercontentsmask = hitsupercontentsmask;
 943                 rhc.trace->fraction = 1;
 944                 rhc.trace->allsolid = true;
 945                 VectorCopy(test, rhc.start);
 946                 VectorCopy(test, rhc.end);
 947                 VectorClear(rhc.dist);
 948                 Mod_Q1BSP_RecursiveHullCheckPoint(&rhc, rhc.hull->firstclipnode);
 949                 //Mod_Q1BSP_RecursiveHullCheck(&rhc, rhc.hull->firstclipnode, 0, 1, test, test);
 950                 if (!trace->startsolid && testtrace.startsolid)
 951                         Con_Printf(" - ended in solid!\n");
 952         }
 953         Con_Print("\n");
 954 #else
 955         if (VectorLength2(rhc.dist))
 956                 Mod_Q1BSP_RecursiveHullCheck(&rhc, rhc.hull->firstclipnode, 0, 1, rhc.start, rhc.end);
 957         else
 958                 Mod_Q1BSP_RecursiveHullCheckPoint(&rhc, rhc.hull->firstclipnode);
 959 #endif
 960 }
 961
 962 static void Mod_Q1BSP_TraceBox(struct model_s *model, const frameblend_t *frameblend, const skeleton_t *skeleton, trace_t *trace, const vec3_t start, const vec3_t boxmins, const vec3_t boxmaxs, const vec3_t end, int hitsupercontentsmask)
 963 {
 964         // this function currently only supports same size start and end
 965         double boxsize[3];
 966         RecursiveHullCheckTraceInfo_t rhc;
 967
 968         if (VectorCompare(boxmins, boxmaxs))
 969         {
 970                 if (VectorCompare(start, end))
 971                         Mod_Q1BSP_TracePoint(model, frameblend, skeleton, trace, start, hitsupercontentsmask);
 972                 else
 973                         Mod_Q1BSP_TraceLine(model, frameblend, skeleton, trace, start, end, hitsupercontentsmask);
 974                 return;
 975         }
 976
 977         memset(&rhc, 0, sizeof(rhc));
 978         memset(trace, 0, sizeof(trace_t));
 979         rhc.trace = trace;
 980         rhc.trace->hitsupercontentsmask = hitsupercontentsmask;
 981         rhc.trace->fraction = 1;
 982         rhc.trace->allsolid = true;
 983         VectorSubtract(boxmaxs, boxmins, boxsize);
 984         if (boxsize[0] < 3)
 985                 rhc.hull = &model->brushq1.hulls[0]; // 0x0x0
 986         else if (model->brush.ishlbsp)
 987         {
 988                 // LordHavoc: this has to have a minor tolerance (the .1) because of
 989                 // minor float precision errors from the box being transformed around
 990                 if (boxsize[0] < 32.1)
 991                 {
 992                         if (boxsize[2] < 54) // pick the nearest of 36 or 72
 993                                 rhc.hull = &model->brushq1.hulls[3]; // 32x32x36
 994                         else
 995                                 rhc.hull = &model->brushq1.hulls[1]; // 32x32x72
 996                 }
 997                 else
 998                         rhc.hull = &model->brushq1.hulls[2]; // 64x64x64
 999         }
1000         else
1001         {
1002                 // LordHavoc: this has to have a minor tolerance (the .1) because of
1003                 // minor float precision errors from the box being transformed around
1004                 if (boxsize[0] < 32.1)
1005                         rhc.hull = &model->brushq1.hulls[1]; // 32x32x56
1006                 else
1007                         rhc.hull = &model->brushq1.hulls[2]; // 64x64x88
1008         }
1009         VectorMAMAM(1, start, 1, boxmins, -1, rhc.hull->clip_mins, rhc.start);
1010         VectorMAMAM(1, end, 1, boxmins, -1, rhc.hull->clip_mins, rhc.end);
1011         VectorSubtract(rhc.end, rhc.start, rhc.dist);
1012 #if COLLISIONPARANOID >= 2
1013         Con_Printf("t(%f %f %f,%f %f %f,%i %f %f %f)", rhc.start[0], rhc.start[1], rhc.start[2], rhc.end[0], rhc.end[1], rhc.end[2], rhc.hull - model->brushq1.hulls, rhc.hull->clip_mins[0], rhc.hull->clip_mins[1], rhc.hull->clip_mins[2]);
1014         Mod_Q1BSP_RecursiveHullCheck(&rhc, rhc.hull->firstclipnode, 0, 1, rhc.start, rhc.end);
1015         {
1016
1017                 double test[3];
1018                 trace_t testtrace;
1019                 VectorLerp(rhc.start, rhc.trace->fraction, rhc.end, test);
1020                 memset(&testtrace, 0, sizeof(trace_t));
1021                 rhc.trace = &testtrace;
1022                 rhc.trace->hitsupercontentsmask = hitsupercontentsmask;
1023                 rhc.trace->fraction = 1;
1024                 rhc.trace->allsolid = true;
1025                 VectorCopy(test, rhc.start);
1026                 VectorCopy(test, rhc.end);
1027                 VectorClear(rhc.dist);
1028                 Mod_Q1BSP_RecursiveHullCheckPoint(&rhc, rhc.hull->firstclipnode);
1029                 //Mod_Q1BSP_RecursiveHullCheck(&rhc, rhc.hull->firstclipnode, 0, 1, test, test);
1030                 if (!trace->startsolid && testtrace.startsolid)
1031                         Con_Printf(" - ended in solid!\n");
1032         }
1033         Con_Print("\n");
1034 #else
1035         if (VectorLength2(rhc.dist))
1036                 Mod_Q1BSP_RecursiveHullCheck(&rhc, rhc.hull->firstclipnode, 0, 1, rhc.start, rhc.end);
1037         else
1038                 Mod_Q1BSP_RecursiveHullCheckPoint(&rhc, rhc.hull->firstclipnode);
1039 #endif
1040 }
1041
1042 static int Mod_Q1BSP_PointSuperContents(struct model_s *model, int frame, const vec3_t point)
1043 {
1044         int num = model->brushq1.hulls[0].firstclipnode;
1045         mplane_t *plane;
1046         mclipnode_t *nodes = model->brushq1.hulls[0].clipnodes;
1047         mplane_t *planes = model->brushq1.hulls[0].planes;
1048         while (num >= 0)
1049         {
1050                 plane = planes + nodes[num].planenum;
1051                 num = nodes[num].children[(plane->type < 3 ? point[plane->type] : DotProduct(plane->normal, point)) < plane->dist];
1052         }
1053         return Mod_Q1BSP_SuperContentsFromNativeContents(NULL, num);
1054 }
1055
1056 void Collision_ClipTrace_Box(trace_t *trace, const vec3_t cmins, const vec3_t cmaxs, const vec3_t start, const vec3_t mins, const vec3_t maxs, const vec3_t end, int hitsupercontentsmask, int boxsupercontents, int boxq3surfaceflags, const texture_t *boxtexture)
1057 {
1058 #if 1
1059         colbrushf_t cbox;
1060         colplanef_t cbox_planes[6];
1061         cbox.isaabb = true;
1062         cbox.hasaabbplanes = true;
1063         cbox.supercontents = boxsupercontents;
1064         cbox.numplanes = 6;
1065         cbox.numpoints = 0;
1066         cbox.numtriangles = 0;
1067         cbox.planes = cbox_planes;
1068         cbox.points = NULL;
1069         cbox.elements = NULL;
1070         cbox.markframe = 0;
1071         cbox.mins[0] = 0;
1072         cbox.mins[1] = 0;
1073         cbox.mins[2] = 0;
1074         cbox.maxs[0] = 0;
1075         cbox.maxs[1] = 0;
1076         cbox.maxs[2] = 0;
1077         cbox_planes[0].normal[0] =  1;cbox_planes[0].normal[1] =  0;cbox_planes[0].normal[2] =  0;cbox_planes[0].dist = cmaxs[0] - mins[0];
1078         cbox_planes[1].normal[0] = -1;cbox_planes[1].normal[1] =  0;cbox_planes[1].normal[2] =  0;cbox_planes[1].dist = maxs[0] - cmins[0];
1079         cbox_planes[2].normal[0] =  0;cbox_planes[2].normal[1] =  1;cbox_planes[2].normal[2] =  0;cbox_planes[2].dist = cmaxs[1] - mins[1];
1080         cbox_planes[3].normal[0] =  0;cbox_planes[3].normal[1] = -1;cbox_planes[3].normal[2] =  0;cbox_planes[3].dist = maxs[1] - cmins[1];
1081         cbox_planes[4].normal[0] =  0;cbox_planes[4].normal[1] =  0;cbox_planes[4].normal[2] =  1;cbox_planes[4].dist = cmaxs[2] - mins[2];
1082         cbox_planes[5].normal[0] =  0;cbox_planes[5].normal[1] =  0;cbox_planes[5].normal[2] = -1;cbox_planes[5].dist = maxs[2] - cmins[2];
1083         cbox_planes[0].q3surfaceflags = boxq3surfaceflags;cbox_planes[0].texture = boxtexture;
1084         cbox_planes[1].q3surfaceflags = boxq3surfaceflags;cbox_planes[1].texture = boxtexture;
1085         cbox_planes[2].q3surfaceflags = boxq3surfaceflags;cbox_planes[2].texture = boxtexture;
1086         cbox_planes[3].q3surfaceflags = boxq3surfaceflags;cbox_planes[3].texture = boxtexture;
1087         cbox_planes[4].q3surfaceflags = boxq3surfaceflags;cbox_planes[4].texture = boxtexture;
1088         cbox_planes[5].q3surfaceflags = boxq3surfaceflags;cbox_planes[5].texture = boxtexture;
1089         memset(trace, 0, sizeof(trace_t));
1090         trace->hitsupercontentsmask = hitsupercontentsmask;
1091         trace->fraction = 1;
1092         Collision_TraceLineBrushFloat(trace, start, end, &cbox, &cbox);
1093 #else
1094         RecursiveHullCheckTraceInfo_t rhc;
1095         static hull_t box_hull;
1096         static mclipnode_t box_clipnodes[6];
1097         static mplane_t box_planes[6];
1098         // fill in a default trace
1099         memset(&rhc, 0, sizeof(rhc));
1100         memset(trace, 0, sizeof(trace_t));
1101         //To keep everything totally uniform, bounding boxes are turned into small
1102         //BSP trees instead of being compared directly.
1103         // create a temp hull from bounding box sizes
1104         box_planes[0].dist = cmaxs[0] - mins[0];
1105         box_planes[1].dist = cmins[0] - maxs[0];
1106         box_planes[2].dist = cmaxs[1] - mins[1];
1107         box_planes[3].dist = cmins[1] - maxs[1];
1108         box_planes[4].dist = cmaxs[2] - mins[2];
1109         box_planes[5].dist = cmins[2] - maxs[2];
1110 #if COLLISIONPARANOID >= 3
1111         Con_Printf("box_planes %f:%f %f:%f %f:%f\ncbox %f %f %f:%f %f %f\nbox %f %f %f:%f %f %f\n", box_planes[0].dist, box_planes[1].dist, box_planes[2].dist, box_planes[3].dist, box_planes[4].dist, box_planes[5].dist, cmins[0], cmins[1], cmins[2], cmaxs[0], cmaxs[1], cmaxs[2], mins[0], mins[1], mins[2], maxs[0], maxs[1], maxs[2]);
1112 #endif
1113
1114         if (box_hull.clipnodes == NULL)
1115         {
1116                 int i, side;
1117
1118                 //Set up the planes and clipnodes so that the six floats of a bounding box
1119                 //can just be stored out and get a proper hull_t structure.
1120
1121                 box_hull.clipnodes = box_clipnodes;
1122                 box_hull.planes = box_planes;
1123                 box_hull.firstclipnode = 0;
1124                 box_hull.lastclipnode = 5;
1125
1126                 for (i = 0;i < 6;i++)
1127                 {
1128                         box_clipnodes[i].planenum = i;
1129
1130                         side = i&1;
1131
1132                         box_clipnodes[i].children[side] = CONTENTS_EMPTY;
1133                         if (i != 5)
1134                                 box_clipnodes[i].children[side^1] = i + 1;
1135                         else
1136                                 box_clipnodes[i].children[side^1] = CONTENTS_SOLID;
1137
1138                         box_planes[i].type = i>>1;
1139                         box_planes[i].normal[i>>1] = 1;
1140                 }
1141         }
1142
1143         // trace a line through the generated clipping hull
1144         //rhc.boxsupercontents = boxsupercontents;
1145         rhc.hull = &box_hull;
1146         rhc.trace = trace;
1147         rhc.trace->hitsupercontentsmask = hitsupercontentsmask;
1148         rhc.trace->fraction = 1;
1149         rhc.trace->allsolid = true;
1150         VectorCopy(start, rhc.start);
1151         VectorCopy(end, rhc.end);
1152         VectorSubtract(rhc.end, rhc.start, rhc.dist);
1153         Mod_Q1BSP_RecursiveHullCheck(&rhc, rhc.hull->firstclipnode, 0, 1, rhc.start, rhc.end);
1154         //VectorMA(rhc.start, rhc.trace->fraction, rhc.dist, rhc.trace->endpos);
1155         if (rhc.trace->startsupercontents)
1156                 rhc.trace->startsupercontents = boxsupercontents;
1157 #endif
1158 }
1159
1160 void Collision_ClipTrace_Point(trace_t *trace, const vec3_t cmins, const vec3_t cmaxs, const vec3_t start, int hitsupercontentsmask, int boxsupercontents, int boxq3surfaceflags, const texture_t *boxtexture)
1161 {
1162         memset(trace, 0, sizeof(trace_t));
1163         trace->fraction = 1;
1164         if (BoxesOverlap(start, start, cmins, cmaxs))
1165         {
1166                 trace->startsupercontents |= boxsupercontents;
1167                 if (hitsupercontentsmask & boxsupercontents)
1168                 {
1169                         trace->startsolid = true;
1170                         trace->allsolid = true;
1171                 }
1172         }
1173 }
1174
1175 static qboolean Mod_Q1BSP_TraceLineOfSight(struct model_s *model, const vec3_t start, const vec3_t end)
1176 {
1177         trace_t trace;
1178         Mod_Q1BSP_TraceLine(model, NULL, NULL, &trace, start, end, SUPERCONTENTS_VISBLOCKERMASK);
1179         return trace.fraction == 1;
1180 }
1181
1182 static int Mod_Q1BSP_LightPoint_RecursiveBSPNode(dp_model_t *model, vec3_t ambientcolor, vec3_t diffusecolor, vec3_t diffusenormal, const mnode_t *node, float x, float y, float startz, float endz)
1183 {
1184         int side;
1185         float front, back;
1186         float mid, distz = endz - startz;
1187
1188         while (node->plane)
1189         {
1190                 switch (node->plane->type)
1191                 {
1192                 case PLANE_X:
1193                         node = node->children[x < node->plane->dist];
1194                         continue; // loop back and process the new node
1195                 case PLANE_Y:
1196                         node = node->children[y < node->plane->dist];
1197                         continue; // loop back and process the new node
1198                 case PLANE_Z:
1199                         side = startz < node->plane->dist;
1200                         if ((endz < node->plane->dist) == side)
1201                         {
1202                                 node = node->children[side];
1203                                 continue; // loop back and process the new node
1204                         }
1205                         // found an intersection
1206                         mid = node->plane->dist;
1207                         break;
1208                 default:
1209                         back = front = x * node->plane->normal[0] + y * node->plane->normal[1];
1210                         front += startz * node->plane->normal[2];
1211                         back += endz * node->plane->normal[2];
1212                         side = front < node->plane->dist;
1213                         if ((back < node->plane->dist) == side)
1214                         {
1215                                 node = node->children[side];
1216                                 continue; // loop back and process the new node
1217                         }
1218                         // found an intersection
1219                         mid = startz + distz * (front - node->plane->dist) / (front - back);
1220                         break;
1221                 }
1222
1223                 // go down front side
1224                 if (node->children[side]->plane && Mod_Q1BSP_LightPoint_RecursiveBSPNode(model, ambientcolor, diffusecolor, diffusenormal, node->children[side], x, y, startz, mid))
1225                         return true;    // hit something
1226
1227                 // check for impact on this node
1228                 if (node->numsurfaces)
1229                 {
1230                         unsigned int i;
1231                         int dsi, dti, lmwidth, lmheight;
1232                         float ds, dt;
1233                         msurface_t *surface;
1234                         unsigned char *lightmap;
1235                         int maps, line3, size3;
1236                         float dsfrac;
1237                         float dtfrac;
1238                         float scale, w, w00, w01, w10, w11;
1239
1240                         surface = model->data_surfaces + node->firstsurface;
1241                         for (i = 0;i < node->numsurfaces;i++, surface++)
1242                         {
1243                                 if (!(surface->texture->basematerialflags & MATERIALFLAG_WALL) || !surface->lightmapinfo || !surface->lightmapinfo->samples)
1244                                         continue;       // no lightmaps
1245
1246                                 // location we want to sample in the lightmap
1247                                 ds = ((x * surface->lightmapinfo->texinfo->vecs[0][0] + y * surface->lightmapinfo->texinfo->vecs[0][1] + mid * surface->lightmapinfo->texinfo->vecs[0][2] + surface->lightmapinfo->texinfo->vecs[0][3]) - surface->lightmapinfo->texturemins[0]) * 0.0625f;
1248                                 dt = ((x * surface->lightmapinfo->texinfo->vecs[1][0] + y * surface->lightmapinfo->texinfo->vecs[1][1] + mid * surface->lightmapinfo->texinfo->vecs[1][2] + surface->lightmapinfo->texinfo->vecs[1][3]) - surface->lightmapinfo->texturemins[1]) * 0.0625f;
1249
1250                                 // check the bounds
1251                                 // thanks to jitspoe for pointing out that this int cast was
1252                                 // rounding toward zero, so we floor it
1253                                 dsi = (int)floor(ds);
1254                                 dti = (int)floor(dt);
1255                                 lmwidth = ((surface->lightmapinfo->extents[0]>>4)+1);
1256                                 lmheight = ((surface->lightmapinfo->extents[1]>>4)+1);
1257
1258                                 // is it in bounds?
1259                                 // we have to tolerate a position of lmwidth-1 for some rare
1260                                 // cases - in which case the sampling position still gets
1261                                 // clamped but the color gets interpolated to that edge.
1262                                 if (dsi >= 0 && dsi < lmwidth && dti >= 0 && dti < lmheight)
1263                                 {
1264                                         // in the rare cases where we're sampling slightly off
1265                                         // the polygon, clamp the sampling position (we can still
1266                                         // interpolate outside it, where it becomes extrapolation)
1267                                         if (dsi < 0)
1268                                                 dsi = 0;
1269                                         if (dti < 0)
1270                                                 dti = 0;
1271                                         if (dsi > lmwidth-2)
1272                                                 dsi = lmwidth-2;
1273                                         if (dti > lmheight-2)
1274                                                 dti = lmheight-2;
1275
1276                                         // calculate bilinear interpolation factors
1277                                         // and also multiply by fixedpoint conversion factors to
1278                                         // compensate for lightmaps being 0-255 (as 0-2), we use
1279                                         // r_refdef.scene.rtlightstylevalue here which is already
1280                                         // 0.000-2.148 range
1281                                         // (if we used r_refdef.scene.lightstylevalue this
1282                                         //  divisor would be 32768 rather than 128)
1283                                         dsfrac = ds - dsi;
1284                                         dtfrac = dt - dti;
1285                                         w00 = (1 - dsfrac) * (1 - dtfrac) * (1.0f / 128.0f);
1286                                         w01 = (    dsfrac) * (1 - dtfrac) * (1.0f / 128.0f);
1287                                         w10 = (1 - dsfrac) * (    dtfrac) * (1.0f / 128.0f);
1288                                         w11 = (    dsfrac) * (    dtfrac) * (1.0f / 128.0f);
1289
1290                                         // values for pointer math
1291                                         line3 = lmwidth * 3; // LordHavoc: *3 for colored lighting
1292                                         size3 = lmwidth * lmheight * 3; // LordHavoc: *3 for colored lighting
1293
1294                                         // look up the pixel
1295                                         lightmap = surface->lightmapinfo->samples + dti * line3 + dsi*3; // LordHavoc: *3 for colored lighting
1296
1297                                         // bilinear filter each lightmap style, and sum them
1298                                         for (maps = 0;maps < MAXLIGHTMAPS && surface->lightmapinfo->styles[maps] != 255;maps++)
1299                                         {
1300                                                 scale = r_refdef.scene.rtlightstylevalue[surface->lightmapinfo->styles[maps]];
1301                                                 w = w00 * scale;VectorMA(ambientcolor, w, lightmap            , ambientcolor);
1302                                                 w = w01 * scale;VectorMA(ambientcolor, w, lightmap + 3        , ambientcolor);
1303                                                 w = w10 * scale;VectorMA(ambientcolor, w, lightmap + line3    , ambientcolor);
1304                                                 w = w11 * scale;VectorMA(ambientcolor, w, lightmap + line3 + 3, ambientcolor);
1305                                                 lightmap += size3;
1306                                         }
1307
1308                                         return true; // success
1309                                 }
1310                         }
1311                 }
1312
1313                 // go down back side
1314                 node = node->children[side ^ 1];
1315                 startz = mid;
1316                 distz = endz - startz;
1317                 // loop back and process the new node
1318         }
1319
1320         // did not hit anything
1321         return false;
1322 }
1323
1324 static void Mod_Q1BSP_LightPoint(dp_model_t *model, const vec3_t p, vec3_t ambientcolor, vec3_t diffusecolor, vec3_t diffusenormal)
1325 {
1326         // pretend lighting is coming down from above (due to lack of a lightgrid to know primary lighting direction)
1327         VectorSet(diffusenormal, 0, 0, 1);
1328
1329         if (!model->brushq1.lightdata)
1330         {
1331                 VectorSet(ambientcolor, 1, 1, 1);
1332                 VectorSet(diffusecolor, 0, 0, 0);
1333                 return;
1334         }
1335
1336         Mod_Q1BSP_LightPoint_RecursiveBSPNode(model, ambientcolor, diffusecolor, diffusenormal, model->brush.data_nodes + model->brushq1.hulls[0].firstclipnode, p[0], p[1], p[2] + 0.125, p[2] - 65536);
1337 }
1338
1339 static const texture_t *Mod_Q1BSP_TraceLineAgainstSurfacesFindTextureOnNode(RecursiveHullCheckTraceInfo_t *t, const dp_model_t *model, const mnode_t *node, double mid[3])
1340 {
1341         unsigned int i;
1342         int j;
1343         int k;
1344         const msurface_t *surface;
1345         float normal[3];
1346         float v0[3];
1347         float v1[3];
1348         float edgedir[3];
1349         float edgenormal[3];
1350         float p[4];
1351         float midf;
1352         float t1;
1353         float t2;
1354         VectorCopy(mid, p);
1355         p[3] = 1;
1356         surface = model->data_surfaces + node->firstsurface;
1357         for (i = 0;i < node->numsurfaces;i++, surface++)
1358         {
1359                 // skip surfaces whose bounding box does not include the point
1360 //              if (!BoxesOverlap(mid, mid, surface->mins, surface->maxs))
1361 //                      continue;
1362                 // skip faces with contents we don't care about
1363                 if (!(t->trace->hitsupercontentsmask & surface->texture->supercontents))
1364                         continue;
1365                 // get the surface normal - since it is flat we know any vertex normal will suffice
1366                 VectorCopy(model->surfmesh.data_normal3f + 3 * surface->num_firstvertex, normal);
1367                 // skip backfaces
1368                 if (DotProduct(t->dist, normal) > 0)
1369                         continue;
1370                 // iterate edges and see if the point is outside one of them
1371                 for (j = 0, k = surface->num_vertices - 1;j < surface->num_vertices;k = j, j++)
1372                 {
1373                         VectorCopy(model->surfmesh.data_vertex3f + 3 * (surface->num_firstvertex + k), v0);
1374                         VectorCopy(model->surfmesh.data_vertex3f + 3 * (surface->num_firstvertex + j), v1);
1375                         VectorSubtract(v0, v1, edgedir);
1376                         CrossProduct(edgedir, normal, edgenormal);
1377                         if (DotProduct(edgenormal, p) > DotProduct(edgenormal, v0))
1378                                 break;
1379                 }
1380                 // if the point is outside one of the edges, it is not within the surface
1381                 if (j < surface->num_vertices)
1382                         continue;
1383
1384                 // we hit a surface, this is the impact point...
1385                 VectorCopy(normal, t->trace->plane.normal);
1386                 t->trace->plane.dist = DotProduct(normal, p);
1387
1388                 // calculate the return fraction which is nudged off the surface a bit
1389                 t1 = DotProduct(t->start, t->trace->plane.normal) - t->trace->plane.dist;
1390                 t2 = DotProduct(t->end, t->trace->plane.normal) - t->trace->plane.dist;
1391                 midf = (t1 - collision_impactnudge.value) / (t1 - t2);
1392                 t->trace->fraction = bound(0, midf, 1);
1393
1394                 t->trace->hittexture = surface->texture->currentframe;
1395                 t->trace->hitq3surfaceflags = t->trace->hittexture->surfaceflags;
1396                 t->trace->hitsupercontents = t->trace->hittexture->supercontents;
1397                 return surface->texture->currentframe;
1398         }
1399         return NULL;
1400 }
1401
1402 static int Mod_Q1BSP_TraceLineAgainstSurfacesRecursiveBSPNode(RecursiveHullCheckTraceInfo_t *t, const dp_model_t *model, const mnode_t *node, const double p1[3], const double p2[3])
1403 {
1404         const mplane_t *plane;
1405         double t1, t2;
1406         int side;
1407         double midf, mid[3];
1408         const mleaf_t *leaf;
1409
1410         while (node->plane)
1411         {
1412                 plane = node->plane;
1413                 if (plane->type < 3)
1414                 {
1415                         t1 = p1[plane->type] - plane->dist;
1416                         t2 = p2[plane->type] - plane->dist;
1417                 }
1418                 else
1419                 {
1420                         t1 = DotProduct (plane->normal, p1) - plane->dist;
1421                         t2 = DotProduct (plane->normal, p2) - plane->dist;
1422                 }
1423                 if (t1 < 0)
1424                 {
1425                         if (t2 < 0)
1426                         {
1427                                 node = node->children[1];
1428                                 continue;
1429                         }
1430                         side = 1;
1431                 }
1432                 else
1433                 {
1434                         if (t2 >= 0)
1435                         {
1436                                 node = node->children[0];
1437                                 continue;
1438                         }
1439                         side = 0;
1440                 }
1441
1442                 // the line intersects, find intersection point
1443                 // LordHavoc: this uses the original trace for maximum accuracy
1444                 if (plane->type < 3)
1445                 {
1446                         t1 = t->start[plane->type] - plane->dist;
1447                         t2 = t->end[plane->type] - plane->dist;
1448                 }
1449                 else
1450                 {
1451                         t1 = DotProduct (plane->normal, t->start) - plane->dist;
1452                         t2 = DotProduct (plane->normal, t->end) - plane->dist;
1453                 }
1454
1455                 midf = t1 / (t1 - t2);
1456                 VectorMA(t->start, midf, t->dist, mid);
1457
1458                 // recurse both sides, front side first, return if we hit a surface
1459                 if (Mod_Q1BSP_TraceLineAgainstSurfacesRecursiveBSPNode(t, model, node->children[side], p1, mid) == HULLCHECKSTATE_DONE)
1460                         return HULLCHECKSTATE_DONE;
1461
1462                 // test each surface on the node
1463                 Mod_Q1BSP_TraceLineAgainstSurfacesFindTextureOnNode(t, model, node, mid);
1464                 if (t->trace->hittexture)
1465                         return HULLCHECKSTATE_DONE;
1466
1467                 // recurse back side
1468                 return Mod_Q1BSP_TraceLineAgainstSurfacesRecursiveBSPNode(t, model, node->children[side ^ 1], mid, p2);
1469         }
1470         leaf = (const mleaf_t *)node;
1471         side = Mod_Q1BSP_SuperContentsFromNativeContents(NULL, leaf->contents);
1472         if (!t->trace->startfound)
1473         {
1474                 t->trace->startfound = true;
1475                 t->trace->startsupercontents |= side;
1476         }
1477         if (side & SUPERCONTENTS_LIQUIDSMASK)
1478                 t->trace->inwater = true;
1479         if (side == 0)
1480                 t->trace->inopen = true;
1481         if (side & t->trace->hitsupercontentsmask)
1482         {
1483                 // if the first leaf is solid, set startsolid
1484                 if (t->trace->allsolid)
1485                         t->trace->startsolid = true;
1486                 return HULLCHECKSTATE_SOLID;
1487         }
1488         else
1489         {
1490                 t->trace->allsolid = false;
1491                 return HULLCHECKSTATE_EMPTY;
1492         }
1493 }
1494
1495 static void Mod_Q1BSP_TraceLineAgainstSurfaces(struct model_s *model, const frameblend_t *frameblend, const skeleton_t *skeleton, trace_t *trace, const vec3_t start, const vec3_t end, int hitsupercontentsmask)
1496 {
1497         RecursiveHullCheckTraceInfo_t rhc;
1498
1499         memset(&rhc, 0, sizeof(rhc));
1500         memset(trace, 0, sizeof(trace_t));
1501         rhc.trace = trace;
1502         rhc.trace->hitsupercontentsmask = hitsupercontentsmask;
1503         rhc.trace->fraction = 1;
1504         rhc.trace->allsolid = true;
1505         rhc.hull = &model->brushq1.hulls[0]; // 0x0x0
1506         VectorCopy(start, rhc.start);
1507         VectorCopy(end, rhc.end);
1508         VectorSubtract(rhc.end, rhc.start, rhc.dist);
1509         Mod_Q1BSP_TraceLineAgainstSurfacesRecursiveBSPNode(&rhc, model, model->brush.data_nodes + rhc.hull->firstclipnode, rhc.start, rhc.end);
1510         VectorMA(rhc.start, rhc.trace->fraction, rhc.dist, rhc.trace->endpos);
1511 }
1512
1513 static void Mod_Q1BSP_DecompressVis(const unsigned char *in, const unsigned char *inend, unsigned char *out, unsigned char *outend)
1514 {
1515         int c;
1516         unsigned char *outstart = out;
1517         while (out < outend)
1518         {
1519                 if (in == inend)
1520                 {
1521                         Con_Printf("Mod_Q1BSP_DecompressVis: input underrun on model \"%s\" (decompressed %i of %i output bytes)\n", loadmodel->name, (int)(out - outstart), (int)(outend - outstart));
1522                         return;
1523                 }
1524                 c = *in++;
1525                 if (c)
1526                         *out++ = c;
1527                 else
1528                 {
1529                         if (in == inend)
1530                         {
1531                                 Con_Printf("Mod_Q1BSP_DecompressVis: input underrun (during zero-run) on model \"%s\" (decompressed %i of %i output bytes)\n", loadmodel->name, (int)(out - outstart), (int)(outend - outstart));
1532                                 return;
1533                         }
1534                         for (c = *in++;c > 0;c--)
1535                         {
1536                                 if (out == outend)
1537                                 {
1538                                         Con_Printf("Mod_Q1BSP_DecompressVis: output overrun on model \"%s\" (decompressed %i of %i output bytes)\n", loadmodel->name, (int)(out - outstart), (int)(outend - outstart));
1539                                         return;
1540                                 }
1541                                 *out++ = 0;
1542                         }
1543                 }
1544         }
1545 }
1546
1547 /*
1548 =============
1549 R_Q1BSP_LoadSplitSky
1550
1551 A sky texture is 256*128, with the right side being a masked overlay
1552 ==============
1553 */
1554 static void R_Q1BSP_LoadSplitSky (unsigned char *src, int width, int height, int bytesperpixel)
1555 {
1556         int x, y;
1557         int w = width/2;
1558         int h = height;
1559         unsigned int *solidpixels = (unsigned int *)Mem_Alloc(tempmempool, w*h*sizeof(unsigned char[4]));
1560         unsigned int *alphapixels = (unsigned int *)Mem_Alloc(tempmempool, w*h*sizeof(unsigned char[4]));
1561
1562         // allocate a texture pool if we need it
1563         if (loadmodel->texturepool == NULL && cls.state != ca_dedicated)
1564                 loadmodel->texturepool = R_AllocTexturePool();
1565
1566         if (bytesperpixel == 4)
1567         {
1568                 for (y = 0;y < h;y++)
1569                 {
1570                         for (x = 0;x < w;x++)
1571                         {
1572                                 solidpixels[y*w+x] = ((unsigned *)src)[y*width+x+w];
1573                                 alphapixels[y*w+x] = ((unsigned *)src)[y*width+x];
1574                         }
1575                 }
1576         }
1577         else
1578         {
1579                 // make an average value for the back to avoid
1580                 // a fringe on the top level
1581                 int p, r, g, b;
1582                 union
1583                 {
1584                         unsigned int i;
1585                         unsigned char b[4];
1586                 }
1587                 bgra;
1588                 r = g = b = 0;
1589                 for (y = 0;y < h;y++)
1590                 {
1591                         for (x = 0;x < w;x++)
1592                         {
1593                                 p = src[x*width+y+w];
1594                                 r += palette_rgb[p][0];
1595                                 g += palette_rgb[p][1];
1596                                 b += palette_rgb[p][2];
1597                         }
1598                 }
1599                 bgra.b[2] = r/(w*h);
1600                 bgra.b[1] = g/(w*h);
1601                 bgra.b[0] = b/(w*h);
1602                 bgra.b[3] = 0;
1603                 for (y = 0;y < h;y++)
1604                 {
1605                         for (x = 0;x < w;x++)
1606                         {
1607                                 solidpixels[y*w+x] = palette_bgra_complete[src[y*width+x+w]];
1608                                 p = src[y*width+x];
1609                                 alphapixels[y*w+x] = p ? palette_bgra_complete[p] : bgra.i;
1610                         }
1611                 }
1612         }
1613
1614         loadmodel->brush.solidskyskinframe = R_SkinFrame_LoadInternalBGRA("sky_solidtexture", 0         , (unsigned char *) solidpixels, w, h, vid.sRGB3D);
1615         loadmodel->brush.alphaskyskinframe = R_SkinFrame_LoadInternalBGRA("sky_alphatexture", TEXF_ALPHA, (unsigned char *) alphapixels, w, h, vid.sRGB3D);
1616         Mem_Free(solidpixels);
1617         Mem_Free(alphapixels);
1618 }
1619
1620 static void Mod_Q1BSP_LoadTextures(sizebuf_t *sb)
1621 {
1622         int i, j, k, num, max, altmax, mtwidth, mtheight, doffset, incomplete, nummiptex = 0;
1623         skinframe_t *skinframe;
1624         texture_t *tx, *tx2, *anims[10], *altanims[10];
1625         texture_t backuptex;
1626         unsigned char *data, *mtdata;
1627         const char *s;
1628         char mapname[MAX_QPATH], name[MAX_QPATH];
1629         unsigned char zeroopaque[4], zerotrans[4];
1630         sizebuf_t miptexsb;
1631         char vabuf[1024];
1632         Vector4Set(zeroopaque, 0, 0, 0, 255);
1633         Vector4Set(zerotrans, 0, 0, 0, 128);
1634
1635         loadmodel->data_textures = NULL;
1636
1637         // add two slots for notexture walls and notexture liquids
1638         if (sb->cursize)
1639         {
1640                 nummiptex = MSG_ReadLittleLong(sb);
1641                 loadmodel->num_textures = nummiptex + 2;
1642                 loadmodel->num_texturesperskin = loadmodel->num_textures;
1643         }
1644         else
1645         {
1646                 loadmodel->num_textures = 2;
1647                 loadmodel->num_texturesperskin = loadmodel->num_textures;
1648         }
1649
1650         loadmodel->data_textures = (texture_t *)Mem_Alloc(loadmodel->mempool, loadmodel->num_textures * sizeof(texture_t));
1651
1652         // fill out all slots with notexture
1653         if (cls.state != ca_dedicated)
1654                 skinframe = R_SkinFrame_LoadMissing();
1655         else
1656                 skinframe = NULL;
1657         for (i = 0, tx = loadmodel->data_textures;i < loadmodel->num_textures;i++, tx++)
1658         {
1659                 strlcpy(tx->name, "NO TEXTURE FOUND", sizeof(tx->name));
1660                 tx->width = 16;
1661                 tx->height = 16;
1662                 tx->basealpha = 1.0f;
1663                 if (cls.state != ca_dedicated)
1664                 {
1665                         tx->numskinframes = 1;
1666                         tx->skinframerate = 1;
1667                         tx->skinframes[0] = skinframe;
1668                         tx->currentskinframe = tx->skinframes[0];
1669                 }
1670                 tx->basematerialflags = MATERIALFLAG_WALL;
1671                 if (i == loadmodel->num_textures - 1)
1672                 {
1673                         tx->basematerialflags |= MATERIALFLAG_WATERSCROLL | MATERIALFLAG_LIGHTBOTHSIDES | MATERIALFLAG_NOSHADOW;
1674                         tx->supercontents = mod_q1bsp_texture_water.supercontents;
1675                         tx->surfaceflags = mod_q1bsp_texture_water.surfaceflags;
1676                 }
1677                 else
1678                 {
1679                         tx->supercontents = mod_q1bsp_texture_solid.supercontents;
1680                         tx->surfaceflags = mod_q1bsp_texture_solid.surfaceflags;
1681                 }
1682                 tx->currentframe = tx;
1683
1684                 // clear water settings
1685                 tx->reflectmin = 0;
1686                 tx->reflectmax = 1;
1687                 tx->refractfactor = 1;
1688                 Vector4Set(tx->refractcolor4f, 1, 1, 1, 1);
1689                 tx->reflectfactor = 1;
1690                 Vector4Set(tx->reflectcolor4f, 1, 1, 1, 1);
1691                 tx->r_water_wateralpha = 1;
1692                 tx->offsetmapping = OFFSETMAPPING_DEFAULT;
1693                 tx->offsetscale = 1;
1694                 tx->offsetbias = 0;
1695                 tx->specularscalemod = 1;
1696                 tx->specularpowermod = 1;
1697                 tx->transparentsort = TRANSPARENTSORT_DISTANCE;
1698                 // WHEN ADDING DEFAULTS HERE, REMEMBER TO PUT DEFAULTS IN ALL LOADERS
1699                 // JUST GREP FOR "specularscalemod = 1".
1700         }
1701
1702         if (!sb->cursize)
1703         {
1704                 Con_Printf("%s: no miptex lump to load textures from\n", loadmodel->name);
1705                 return;
1706         }
1707
1708         s = loadmodel->name;
1709         if (!strncasecmp(s, "maps/", 5))
1710                 s += 5;
1711         FS_StripExtension(s, mapname, sizeof(mapname));
1712
1713         // just to work around bounds checking when debugging with it (array index out of bounds error thing)
1714         // LordHavoc: mostly rewritten map texture loader
1715         for (i = 0;i < nummiptex;i++)
1716         {
1717                 doffset = MSG_ReadLittleLong(sb);
1718                 if (r_nosurftextures.integer)
1719                         continue;
1720                 if (doffset == -1)
1721                 {
1722                         Con_DPrintf("%s: miptex #%i missing\n", loadmodel->name, i);
1723                         continue;
1724                 }
1725
1726                 MSG_InitReadBuffer(&miptexsb, sb->data + doffset, sb->cursize - doffset);
1727
1728                 // copy name, but only up to 16 characters
1729                 // (the output buffer can hold more than this, but the input buffer is
1730                 //  only 16)
1731                 for (j = 0;j < 16;j++)
1732                         name[j] = MSG_ReadByte(&miptexsb);
1733                 name[j] = 0;
1734                 // pretty up the buffer (replacing any trailing garbage with 0)
1735                 for (j = (int)strlen(name);j < 16;j++)
1736                         name[j] = 0;
1737
1738                 if (!name[0])
1739                 {
1740                         dpsnprintf(name, sizeof(name), "unnamed%i", i);
1741                         Con_DPrintf("%s: warning: renaming unnamed texture to %s\n", loadmodel->name, name);
1742                 }
1743
1744                 mtwidth = MSG_ReadLittleLong(&miptexsb);
1745                 mtheight = MSG_ReadLittleLong(&miptexsb);
1746                 mtdata = NULL;
1747                 j = MSG_ReadLittleLong(&miptexsb);
1748                 if (j)
1749                 {
1750                         // texture included
1751                         if (j < 40 || j + mtwidth * mtheight > miptexsb.cursize)
1752                         {
1753                                 Con_Printf("%s: Texture \"%s\" is corrupt or incomplete\n", loadmodel->name, name);
1754                                 continue;
1755                         }
1756                         mtdata = miptexsb.data + j;
1757                 }
1758
1759                 if ((mtwidth & 15) || (mtheight & 15))
1760                         Con_DPrintf("%s: warning: texture \"%s\" is not 16 aligned\n", loadmodel->name, name);
1761
1762                 // LordHavoc: force all names to lowercase
1763                 for (j = 0;name[j];j++)
1764                         if (name[j] >= 'A' && name[j] <= 'Z')
1765                                 name[j] += 'a' - 'A';
1766
1767                 // LordHavoc: backup the texture_t because q3 shader loading overwrites it
1768                 backuptex = loadmodel->data_textures[i];
1769                 if (name[0] && Mod_LoadTextureFromQ3Shader(loadmodel->data_textures + i, name, false, false, 0))
1770                         continue;
1771                 loadmodel->data_textures[i] = backuptex;
1772
1773                 tx = loadmodel->data_textures + i;
1774                 strlcpy(tx->name, name, sizeof(tx->name));
1775                 tx->width = mtwidth;
1776                 tx->height = mtheight;
1777                 tx->basealpha = 1.0f;
1778
1779                 if (tx->name[0] == '*')
1780                 {
1781                         if (!strncmp(tx->name, "*lava", 5))
1782                         {
1783                                 tx->supercontents = mod_q1bsp_texture_lava.supercontents;
1784                                 tx->surfaceflags = mod_q1bsp_texture_lava.surfaceflags;
1785                         }
1786                         else if (!strncmp(tx->name, "*slime", 6))
1787                         {
1788                                 tx->supercontents = mod_q1bsp_texture_slime.supercontents;
1789                                 tx->surfaceflags = mod_q1bsp_texture_slime.surfaceflags;
1790                         }
1791                         else
1792                         {
1793                                 tx->supercontents = mod_q1bsp_texture_water.supercontents;
1794                                 tx->surfaceflags = mod_q1bsp_texture_water.surfaceflags;
1795                         }
1796                 }
1797                 else if (!strncmp(tx->name, "sky", 3))
1798                 {
1799                         tx->supercontents = mod_q1bsp_texture_sky.supercontents;
1800                         tx->surfaceflags = mod_q1bsp_texture_sky.surfaceflags;
1801                         // for the surface traceline we need to hit this surface as a solid...
1802                         tx->supercontents |= SUPERCONTENTS_SOLID;
1803                 }
1804                 else
1805                 {
1806                         tx->supercontents = mod_q1bsp_texture_solid.supercontents;
1807                         tx->surfaceflags = mod_q1bsp_texture_solid.surfaceflags;
1808                 }
1809
1810                 if (cls.state != ca_dedicated)
1811                 {
1812                         // LordHavoc: HL sky textures are entirely different than quake
1813                         if (!loadmodel->brush.ishlbsp && !strncmp(tx->name, "sky", 3) && mtwidth == mtheight * 2)
1814                         {
1815                                 data = loadimagepixelsbgra(gamemode == GAME_TENEBRAE ? tx->name : va(vabuf, sizeof(vabuf), "textures/%s/%s", mapname, tx->name), false, false, false, NULL);
1816                                 if (!data)
1817                                         data = loadimagepixelsbgra(gamemode == GAME_TENEBRAE ? tx->name : va(vabuf, sizeof(vabuf), "textures/%s", tx->name), false, false, false, NULL);
1818                                 if (data && image_width == image_height * 2)
1819                                 {
1820                                         R_Q1BSP_LoadSplitSky(data, image_width, image_height, 4);
1821                                         Mem_Free(data);
1822                                 }
1823                                 else if (mtdata != NULL)
1824                                         R_Q1BSP_LoadSplitSky(mtdata, mtwidth, mtheight, 1);
1825                         }
1826                         else
1827                         {
1828                                 skinframe = R_SkinFrame_LoadExternal(gamemode == GAME_TENEBRAE ? tx->name : va(vabuf, sizeof(vabuf), "textures/%s/%s", mapname, tx->name), TEXF_ALPHA | TEXF_MIPMAP | TEXF_ISWORLD | TEXF_PICMIP | TEXF_COMPRESS, false);
1829                                 if (!skinframe)
1830                                         skinframe = R_SkinFrame_LoadExternal(gamemode == GAME_TENEBRAE ? tx->name : va(vabuf, sizeof(vabuf), "textures/%s", tx->name), TEXF_ALPHA | TEXF_MIPMAP | TEXF_ISWORLD | TEXF_PICMIP | TEXF_COMPRESS, false);
1831                                 if (skinframe)
1832                                         tx->offsetmapping = OFFSETMAPPING_DEFAULT; // allow offsetmapping on external textures without a q3 shader
1833                                 if (!skinframe)
1834                                 {
1835                                         // did not find external texture, load it from the bsp or wad3
1836                                         if (loadmodel->brush.ishlbsp)
1837                                         {
1838                                                 // internal texture overrides wad
1839                                                 unsigned char *pixels, *freepixels;
1840                                                 pixels = freepixels = NULL;
1841                                                 if (mtdata)
1842                                                         pixels = W_ConvertWAD3TextureBGRA(&miptexsb);
1843                                                 if (pixels == NULL)
1844                                                         pixels = freepixels = W_GetTextureBGRA(tx->name);
1845                                                 if (pixels != NULL)
1846                                                 {
1847                                                         tx->width = image_width;
1848                                                         tx->height = image_height;
1849                                                         skinframe = R_SkinFrame_LoadInternalBGRA(tx->name, TEXF_ALPHA | TEXF_MIPMAP | TEXF_ISWORLD | TEXF_PICMIP, pixels, image_width, image_height, true);
1850                                                 }
1851                                                 if (freepixels)
1852                                                         Mem_Free(freepixels);
1853                                         }
1854                                         else if (mtdata) // texture included
1855                                                 skinframe = R_SkinFrame_LoadInternalQuake(tx->name, TEXF_MIPMAP | TEXF_ISWORLD | TEXF_PICMIP, false, r_fullbrights.integer, mtdata, tx->width, tx->height);
1856                                 }
1857                                 // if skinframe is still NULL the "missing" texture will be used
1858                                 if (skinframe)
1859                                         tx->skinframes[0] = skinframe;
1860                         }
1861                         // LordHavoc: some Tenebrae textures get replaced by black
1862                         if (!strncmp(tx->name, "*glassmirror", 12)) // Tenebrae
1863                                 tx->skinframes[0] = R_SkinFrame_LoadInternalBGRA(tx->name, TEXF_MIPMAP | TEXF_ALPHA, zerotrans, 1, 1, false);
1864                         else if (!strncmp(tx->name, "mirror", 6)) // Tenebrae
1865                                 tx->skinframes[0] = R_SkinFrame_LoadInternalBGRA(tx->name, 0, zeroopaque, 1, 1, false);
1866                 }
1867
1868                 tx->basematerialflags = MATERIALFLAG_WALL;
1869                 if (tx->name[0] == '*')
1870                 {
1871                         // LordHavoc: some turbulent textures should not be affected by wateralpha
1872                         if (!strncmp(tx->name, "*glassmirror", 12)) // Tenebrae
1873                                 tx->basematerialflags |= MATERIALFLAG_NOSHADOW | MATERIALFLAG_ADD | MATERIALFLAG_BLENDED | MATERIALFLAG_REFLECTION;
1874                         else if (!strncmp(tx->name,"*lava",5)
1875                          || !strncmp(tx->name,"*teleport",9)
1876                          || !strncmp(tx->name,"*rift",5)) // Scourge of Armagon texture
1877                                 tx->basematerialflags |= MATERIALFLAG_WATERSCROLL | MATERIALFLAG_LIGHTBOTHSIDES | MATERIALFLAG_NOSHADOW;
1878                         else
1879                                 tx->basematerialflags |= MATERIALFLAG_WATERSCROLL | MATERIALFLAG_LIGHTBOTHSIDES | MATERIALFLAG_NOSHADOW | MATERIALFLAG_WATERALPHA | MATERIALFLAG_WATERSHADER;
1880                         if (tx->skinframes[0] && tx->skinframes[0]->hasalpha)
1881                                 tx->basematerialflags |= MATERIALFLAG_ALPHA | MATERIALFLAG_BLENDED | MATERIALFLAG_NOSHADOW;
1882                 }
1883                 else if (tx->name[0] == '{') // fence textures
1884                 {
1885                         tx->basematerialflags |= MATERIALFLAG_ALPHATEST | MATERIALFLAG_NOSHADOW;
1886                 }
1887                 else if (!strncmp(tx->name, "mirror", 6)) // Tenebrae
1888                 {
1889                         // replace the texture with black
1890                         tx->basematerialflags |= MATERIALFLAG_REFLECTION;
1891                 }
1892                 else if (!strncmp(tx->name, "sky", 3))
1893                         tx->basematerialflags = MATERIALFLAG_SKY | MATERIALFLAG_NOSHADOW;
1894                 else if (!strcmp(tx->name, "caulk"))
1895                         tx->basematerialflags = MATERIALFLAG_NODRAW | MATERIALFLAG_NOSHADOW;
1896                 else if (tx->skinframes[0] && tx->skinframes[0]->hasalpha)
1897                         tx->basematerialflags |= MATERIALFLAG_ALPHA | MATERIALFLAG_BLENDED | MATERIALFLAG_NOSHADOW;
1898
1899                 // start out with no animation
1900                 tx->currentframe = tx;
1901                 tx->currentskinframe = tx->skinframes[0];
1902                 tx->currentmaterialflags = tx->basematerialflags;
1903         }
1904
1905         // sequence the animations
1906         for (i = 0;i < nummiptex;i++)
1907         {
1908                 tx = loadmodel->data_textures + i;
1909                 if (!tx || tx->name[0] != '+' || tx->name[1] == 0 || tx->name[2] == 0)
1910                         continue;
1911                 num = tx->name[1];
1912                 if ((num < '0' || num > '9') && (num < 'a' || num > 'j'))
1913                 {
1914                         Con_Printf("Bad animating texture %s\n", tx->name);
1915                         continue;
1916                 }
1917                 if (tx->anim_total[0] || tx->anim_total[1])
1918                         continue;       // already sequenced
1919
1920                 // find the number of frames in the animation
1921                 memset(anims, 0, sizeof(anims));
1922                 memset(altanims, 0, sizeof(altanims));
1923
1924                 for (j = i;j < nummiptex;j++)
1925                 {
1926                         tx2 = loadmodel->data_textures + j;
1927                         if (!tx2 || tx2->name[0] != '+' || strcmp(tx2->name+2, tx->name+2))
1928                                 continue;
1929
1930                         num = tx2->name[1];
1931                         if (num >= '0' && num <= '9')
1932                                 anims[num - '0'] = tx2;
1933                         else if (num >= 'a' && num <= 'j')
1934                                 altanims[num - 'a'] = tx2;
1935                         // No need to warn otherwise - we already did above.
1936                 }
1937
1938                 max = altmax = 0;
1939                 for (j = 0;j < 10;j++)
1940                 {
1941                         if (anims[j])
1942                                 max = j + 1;
1943                         if (altanims[j])
1944                                 altmax = j + 1;
1945                 }
1946                 //Con_Printf("linking animation %s (%i:%i frames)\n\n", tx->name, max, altmax);
1947
1948                 incomplete = false;
1949                 for (j = 0;j < max;j++)
1950                 {
1951                         if (!anims[j])
1952                         {
1953                                 Con_Printf("Missing frame %i of %s\n", j, tx->name);
1954                                 incomplete = true;
1955                         }
1956                 }
1957                 for (j = 0;j < altmax;j++)
1958                 {
1959                         if (!altanims[j])
1960                         {
1961                                 Con_Printf("Missing altframe %i of %s\n", j, tx->name);
1962                                 incomplete = true;
1963                         }
1964                 }
1965                 if (incomplete)
1966                         continue;
1967
1968                 // If we have exactly one frame, something's wrong.
1969                 if (max + altmax <= 1)
1970                 {
1971                         Con_Printf("Texture %s is animated (leading +) but has only one frame\n", tx->name);
1972                 }
1973
1974                 if (altmax < 1)
1975                 {
1976                         // if there is no alternate animation, duplicate the primary
1977                         // animation into the alternate
1978                         altmax = max;
1979                         for (k = 0;k < 10;k++)
1980                                 altanims[k] = anims[k];
1981                 }
1982
1983                 if (max < 1)
1984                 {
1985                         // Warn.
1986                         Con_Printf("Missing frame 0 of %s\n", tx->name);
1987
1988                         // however, we can handle this by duplicating the alternate animation into the primary
1989                         max = altmax;
1990                         for (k = 0;k < 10;k++)
1991                                 anims[k] = altanims[k];
1992                 }
1993
1994
1995                 // link together the primary animation
1996                 for (j = 0;j < max;j++)
1997                 {
1998                         tx2 = anims[j];
1999                         tx2->animated = 1; // q1bsp
2000                         tx2->anim_total[0] = max;
2001                         tx2->anim_total[1] = altmax;
2002                         for (k = 0;k < 10;k++)
2003                         {
2004                                 tx2->anim_frames[0][k] = anims[k];
2005                                 tx2->anim_frames[1][k] = altanims[k];
2006                         }
2007                 }
2008
2009                 // if there really is an alternate anim...
2010                 if (anims[0] != altanims[0])
2011                 {
2012                         // link together the alternate animation
2013                         for (j = 0;j < altmax;j++)
2014                         {
2015                                 tx2 = altanims[j];
2016                                 tx2->animated = 1; // q1bsp
2017                                 // the primary/alternate are reversed here
2018                                 tx2->anim_total[0] = altmax;
2019                                 tx2->anim_total[1] = max;
2020                                 for (k = 0;k < 10;k++)
2021                                 {
2022                                         tx2->anim_frames[0][k] = altanims[k];
2023                                         tx2->anim_frames[1][k] = anims[k];
2024                                 }
2025                         }
2026                 }
2027         }
2028 }
2029
2030 static void Mod_Q1BSP_LoadLighting(sizebuf_t *sb)
2031 {
2032         int i;
2033         unsigned char *in, *out, *data, d;
2034         char litfilename[MAX_QPATH];
2035         char dlitfilename[MAX_QPATH];
2036         fs_offset_t filesize;
2037         if (loadmodel->brush.ishlbsp) // LordHavoc: load the colored lighting data straight
2038         {
2039                 loadmodel->brushq1.lightdata = (unsigned char *)Mem_Alloc(loadmodel->mempool, sb->cursize);
2040                 for (i = 0;i < sb->cursize;i++)
2041                         loadmodel->brushq1.lightdata[i] = sb->data[i] >>= 1;
2042         }
2043         else // LordHavoc: bsp version 29 (normal white lighting)
2044         {
2045                 // LordHavoc: hope is not lost yet, check for a .lit file to load
2046                 strlcpy (litfilename, loadmodel->name, sizeof (litfilename));
2047                 FS_StripExtension (litfilename, litfilename, sizeof (litfilename));
2048                 strlcpy (dlitfilename, litfilename, sizeof (dlitfilename));
2049                 strlcat (litfilename, ".lit", sizeof (litfilename));
2050                 strlcat (dlitfilename, ".dlit", sizeof (dlitfilename));
2051                 data = (unsigned char*) FS_LoadFile(litfilename, tempmempool, false, &filesize);
2052                 if (data)
2053                 {
2054                         if (filesize == (fs_offset_t)(8 + sb->cursize * 3) && data[0] == 'Q' && data[1] == 'L' && data[2] == 'I' && data[3] == 'T')
2055                         {
2056                                 i = LittleLong(((int *)data)[1]);
2057                                 if (i == 1)
2058                                 {
2059                                         if (developer_loading.integer)
2060                                                 Con_Printf("loaded %s\n", litfilename);
2061                                         loadmodel->brushq1.lightdata = (unsigned char *)Mem_Alloc(loadmodel->mempool, filesize - 8);
2062                                         memcpy(loadmodel->brushq1.lightdata, data + 8, filesize - 8);
2063                                         Mem_Free(data);
2064                                         data = (unsigned char*) FS_LoadFile(dlitfilename, tempmempool, false, &filesize);
2065                                         if (data)
2066                                         {
2067                                                 if (filesize == (fs_offset_t)(8 + sb->cursize * 3) && data[0] == 'Q' && data[1] == 'L' && data[2] == 'I' && data[3] == 'T')
2068                                                 {
2069                                                         i = LittleLong(((int *)data)[1]);
2070                                                         if (i == 1)
2071                                                         {
2072                                                                 if (developer_loading.integer)
2073                                                                         Con_Printf("loaded %s\n", dlitfilename);
2074                                                                 loadmodel->brushq1.nmaplightdata = (unsigned char *)Mem_Alloc(loadmodel->mempool, filesize - 8);
2075                                                                 memcpy(loadmodel->brushq1.nmaplightdata, data + 8, filesize - 8);
2076                                                                 loadmodel->brushq3.deluxemapping_modelspace = false;
2077                                                                 loadmodel->brushq3.deluxemapping = true;
2078                                                         }
2079                                                 }
2080                                                 Mem_Free(data);
2081                                                 data = NULL;
2082                                         }
2083                                         return;
2084                                 }
2085                                 else
2086                                         Con_Printf("Unknown .lit file version (%d)\n", i);
2087                         }
2088                         else if (filesize == 8)
2089                                 Con_Print("Empty .lit file, ignoring\n");
2090                         else
2091                                 Con_Printf("Corrupt .lit file (file size %i bytes, should be %i bytes), ignoring\n", (int) filesize, (int) (8 + sb->cursize * 3));
2092                         if (data)
2093                         {
2094                                 Mem_Free(data);
2095                                 data = NULL;
2096                         }
2097                 }
2098                 // LordHavoc: oh well, expand the white lighting data
2099                 if (!sb->cursize)
2100                         return;
2101                 loadmodel->brushq1.lightdata = (unsigned char *)Mem_Alloc(loadmodel->mempool, sb->cursize*3);
2102                 in = sb->data;
2103                 out = loadmodel->brushq1.lightdata;
2104                 for (i = 0;i < sb->cursize;i++)
2105                 {
2106                         d = *in++;
2107                         *out++ = d;
2108                         *out++ = d;
2109                         *out++ = d;
2110                 }
2111         }
2112 }
2113
2114 static void Mod_Q1BSP_LoadVisibility(sizebuf_t *sb)
2115 {
2116         loadmodel->brushq1.num_compressedpvs = 0;
2117         loadmodel->brushq1.data_compressedpvs = NULL;
2118         if (!sb->cursize)
2119                 return;
2120         loadmodel->brushq1.num_compressedpvs = sb->cursize;
2121         loadmodel->brushq1.data_compressedpvs = (unsigned char *)Mem_Alloc(loadmodel->mempool, sb->cursize);
2122         MSG_ReadBytes(sb, sb->cursize, loadmodel->brushq1.data_compressedpvs);
2123 }
2124
2125 // used only for HalfLife maps
2126 static void Mod_Q1BSP_ParseWadsFromEntityLump(const char *data)
2127 {
2128         char key[128], value[4096];
2129         int i, j, k;
2130         if (!data)
2131                 return;
2132         if (!COM_ParseToken_Simple(&data, false, false, true))
2133                 return; // error
2134         if (com_token[0] != '{')
2135                 return; // error
2136         while (1)
2137         {
2138                 if (!COM_ParseToken_Simple(&data, false, false, true))
2139                         return; // error
2140                 if (com_token[0] == '}')
2141                         break; // end of worldspawn
2142                 if (com_token[0] == '_')
2143                         strlcpy(key, com_token + 1, sizeof(key));
2144                 else
2145                         strlcpy(key, com_token, sizeof(key));
2146                 while (key[strlen(key)-1] == ' ') // remove trailing spaces
2147                         key[strlen(key)-1] = 0;
2148                 if (!COM_ParseToken_Simple(&data, false, false, true))
2149                         return; // error
2150                 dpsnprintf(value, sizeof(value), "%s", com_token);
2151                 if (!strcmp("wad", key)) // for HalfLife maps
2152                 {
2153                         if (loadmodel->brush.ishlbsp)
2154                         {
2155                                 j = 0;
2156                                 for (i = 0;i < (int)sizeof(value);i++)
2157                                         if (value[i] != ';' && value[i] != '\\' && value[i] != '/' && value[i] != ':')
2158                                                 break;
2159                                 if (i < (int)sizeof(value) && value[i])
2160                                 {
2161                                         for (;i < (int)sizeof(value);i++)
2162                                         {
2163                                                 // ignore path - the \\ check is for HalfLife... stupid windoze 'programmers'...
2164                                                 if (value[i] == '\\' || value[i] == '/' || value[i] == ':')
2165                                                         j = i+1;
2166                                                 else if (value[i] == ';' || value[i] == 0)
2167                                                 {
2168                                                         k = value[i];
2169                                                         value[i] = 0;
2170                                                         W_LoadTextureWadFile(&value[j], false);
2171                                                         j = i+1;
2172                                                         if (!k)
2173                                                                 break;
2174                                                 }
2175                                         }
2176                                 }
2177                         }
2178                 }
2179         }
2180 }
2181
2182 static void Mod_Q1BSP_LoadEntities(sizebuf_t *sb)
2183 {
2184         loadmodel->brush.entities = NULL;
2185         if (!sb->cursize)
2186                 return;
2187         loadmodel->brush.entities = (char *)Mem_Alloc(loadmodel->mempool, sb->cursize + 1);
2188         MSG_ReadBytes(sb, sb->cursize, (unsigned char *)loadmodel->brush.entities);
2189         loadmodel->brush.entities[sb->cursize] = 0;
2190         if (loadmodel->brush.ishlbsp)
2191                 Mod_Q1BSP_ParseWadsFromEntityLump(loadmodel->brush.entities);
2192 }
2193
2194
2195 static void Mod_Q1BSP_LoadVertexes(sizebuf_t *sb)
2196 {
2197         mvertex_t       *out;
2198         int                     i, count;
2199         int                     structsize = 12;
2200
2201         if (sb->cursize % structsize)
2202                 Host_Error("Mod_Q1BSP_LoadVertexes: funny lump size in %s",loadmodel->name);
2203         count = sb->cursize / structsize;
2204         out = (mvertex_t *)Mem_Alloc(loadmodel->mempool, count*sizeof(*out));
2205
2206         loadmodel->brushq1.vertexes = out;
2207         loadmodel->brushq1.numvertexes = count;
2208
2209         for ( i=0 ; i<count ; i++, out++)
2210         {
2211                 out->position[0] = MSG_ReadLittleFloat(sb);
2212                 out->position[1] = MSG_ReadLittleFloat(sb);
2213                 out->position[2] = MSG_ReadLittleFloat(sb);
2214         }
2215 }
2216
2217 static void Mod_Q1BSP_LoadSubmodels(sizebuf_t *sb, hullinfo_t *hullinfo)
2218 {
2219         mmodel_t        *out;
2220         int                     i, j, count;
2221         int                     structsize = (48+4*hullinfo->filehulls);
2222
2223         if (sb->cursize % structsize)
2224                 Host_Error ("Mod_Q1BSP_LoadSubmodels: funny lump size in %s", loadmodel->name);
2225
2226         count = sb->cursize / structsize;
2227         out = (mmodel_t *)Mem_Alloc (loadmodel->mempool, count*sizeof(*out));
2228
2229         loadmodel->brushq1.submodels = out;
2230         loadmodel->brush.numsubmodels = count;
2231
2232         for (i = 0; i < count; i++, out++)
2233         {
2234         // spread out the mins / maxs by a pixel
2235                 out->mins[0] = MSG_ReadLittleFloat(sb) - 1;
2236                 out->mins[1] = MSG_ReadLittleFloat(sb) - 1;
2237                 out->mins[2] = MSG_ReadLittleFloat(sb) - 1;
2238                 out->maxs[0] = MSG_ReadLittleFloat(sb) + 1;
2239                 out->maxs[1] = MSG_ReadLittleFloat(sb) + 1;
2240                 out->maxs[2] = MSG_ReadLittleFloat(sb) + 1;
2241                 out->origin[0] = MSG_ReadLittleFloat(sb);
2242                 out->origin[1] = MSG_ReadLittleFloat(sb);
2243                 out->origin[2] = MSG_ReadLittleFloat(sb);
2244                 for (j = 0; j < hullinfo->filehulls; j++)
2245                         out->headnode[j] = MSG_ReadLittleLong(sb);
2246                 out->visleafs  = MSG_ReadLittleLong(sb);
2247                 out->firstface = MSG_ReadLittleLong(sb);
2248                 out->numfaces  = MSG_ReadLittleLong(sb);
2249         }
2250 }
2251
2252 static void Mod_Q1BSP_LoadEdges(sizebuf_t *sb)
2253 {
2254         medge_t *out;
2255         int     i, count;
2256         int             structsize = loadmodel->brush.isbsp2 ? 8 : 4;
2257
2258         if (sb->cursize % structsize)
2259                 Host_Error("Mod_Q1BSP_LoadEdges: funny lump size in %s",loadmodel->name);
2260         count = sb->cursize / structsize;
2261         out = (medge_t *)Mem_Alloc(loadmodel->mempool, count * sizeof(*out));
2262
2263         loadmodel->brushq1.edges = out;
2264         loadmodel->brushq1.numedges = count;
2265
2266         for ( i=0 ; i<count ; i++, out++)
2267         {
2268                 if (loadmodel->brush.isbsp2)
2269                 {
2270                         out->v[0] = (unsigned int)MSG_ReadLittleLong(sb);
2271                         out->v[1] = (unsigned int)MSG_ReadLittleLong(sb);
2272                 }
2273                 else
2274                 {
2275                         out->v[0] = (unsigned short)MSG_ReadLittleShort(sb);
2276                         out->v[1] = (unsigned short)MSG_ReadLittleShort(sb);
2277                 }
2278                 if ((int)out->v[0] >= loadmodel->brushq1.numvertexes || (int)out->v[1] >= loadmodel->brushq1.numvertexes)
2279                 {
2280                         Con_Printf("Mod_Q1BSP_LoadEdges: %s has invalid vertex indices in edge %i (vertices %i %i >= numvertices %i)\n", loadmodel->name, i, out->v[0], out->v[1], loadmodel->brushq1.numvertexes);
2281                         if(!loadmodel->brushq1.numvertexes)
2282                                 Host_Error("Mod_Q1BSP_LoadEdges: %s has edges but no vertexes, cannot fix\n", loadmodel->name);
2283
2284                         out->v[0] = 0;
2285                         out->v[1] = 0;
2286                 }
2287         }
2288 }
2289
2290 static void Mod_Q1BSP_LoadTexinfo(sizebuf_t *sb)
2291 {
2292         mtexinfo_t *out;
2293         int i, j, k, count, miptex;
2294         int structsize = 40;
2295
2296         if (sb->cursize % structsize)
2297                 Host_Error("Mod_Q1BSP_LoadTexinfo: funny lump size in %s",loadmodel->name);
2298         count = sb->cursize / structsize;
2299         out = (mtexinfo_t *)Mem_Alloc(loadmodel->mempool, count * sizeof(*out));
2300
2301         loadmodel->brushq1.texinfo = out;
2302         loadmodel->brushq1.numtexinfo = count;
2303
2304         for (i = 0;i < count;i++, out++)
2305         {
2306                 for (k = 0;k < 2;k++)
2307                         for (j = 0;j < 4;j++)
2308                                 out->vecs[k][j] = MSG_ReadLittleFloat(sb);
2309
2310                 miptex = MSG_ReadLittleLong(sb);
2311                 out->q1flags = MSG_ReadLittleLong(sb);
2312
2313                 if (out->q1flags & TEX_SPECIAL)
2314                 {
2315                         // if texture chosen is NULL or the shader needs a lightmap,
2316                         // force to notexture water shader
2317                         out->textureindex = loadmodel->num_textures - 1;
2318                 }
2319                 else
2320                 {
2321                         // if texture chosen is NULL, force to notexture
2322                         out->textureindex = loadmodel->num_textures - 2;
2323                 }
2324                 // see if the specified miptex is valid and try to use it instead
2325                 if (loadmodel->data_textures)
2326                 {
2327                         if ((unsigned int) miptex >= (unsigned int) loadmodel->num_textures)
2328                                 Con_Printf("error in model \"%s\": invalid miptex index %i(of %i)\n", loadmodel->name, miptex, loadmodel->num_textures);
2329                         else
2330                                 out->textureindex = miptex;
2331                 }
2332         }
2333 }
2334
2335 #if 0
2336 void BoundPoly(int numverts, float *verts, vec3_t mins, vec3_t maxs)
2337 {
2338         int             i, j;
2339         float   *v;
2340
2341         mins[0] = mins[1] = mins[2] = 9999;
2342         maxs[0] = maxs[1] = maxs[2] = -9999;
2343         v = verts;
2344         for (i = 0;i < numverts;i++)
2345         {
2346                 for (j = 0;j < 3;j++, v++)
2347                 {
2348                         if (*v < mins[j])
2349                                 mins[j] = *v;
2350                         if (*v > maxs[j])
2351                                 maxs[j] = *v;
2352                 }
2353         }
2354 }
2355
2356 #define MAX_SUBDIVPOLYTRIANGLES 4096
2357 #define MAX_SUBDIVPOLYVERTS(MAX_SUBDIVPOLYTRIANGLES * 3)
2358
2359 static int subdivpolyverts, subdivpolytriangles;
2360 static int subdivpolyindex[MAX_SUBDIVPOLYTRIANGLES][3];
2361 static float subdivpolyvert[MAX_SUBDIVPOLYVERTS][3];
2362
2363 static int subdivpolylookupvert(vec3_t v)
2364 {
2365         int i;
2366         for (i = 0;i < subdivpolyverts;i++)
2367                 if (subdivpolyvert[i][0] == v[0]
2368                  && subdivpolyvert[i][1] == v[1]
2369                  && subdivpolyvert[i][2] == v[2])
2370                         return i;
2371         if (subdivpolyverts >= MAX_SUBDIVPOLYVERTS)
2372                 Host_Error("SubDividePolygon: ran out of vertices in buffer, please increase your r_subdivide_size");
2373         VectorCopy(v, subdivpolyvert[subdivpolyverts]);
2374         return subdivpolyverts++;
2375 }
2376
2377 static void SubdividePolygon(int numverts, float *verts)
2378 {
2379         int             i, i1, i2, i3, f, b, c, p;
2380         vec3_t  mins, maxs, front[256], back[256];
2381         float   m, *pv, *cv, dist[256], frac;
2382
2383         if (numverts > 250)
2384                 Host_Error("SubdividePolygon: ran out of verts in buffer");
2385
2386         BoundPoly(numverts, verts, mins, maxs);
2387
2388         for (i = 0;i < 3;i++)
2389         {
2390                 m = (mins[i] + maxs[i]) * 0.5;
2391                 m = r_subdivide_size.value * floor(m/r_subdivide_size.value + 0.5);
2392                 if (maxs[i] - m < 8)
2393                         continue;
2394                 if (m - mins[i] < 8)
2395                         continue;
2396
2397                 // cut it
2398                 for (cv = verts, c = 0;c < numverts;c++, cv += 3)
2399                         dist[c] = cv[i] - m;
2400
2401                 f = b = 0;
2402                 for (p = numverts - 1, c = 0, pv = verts + p * 3, cv = verts;c < numverts;p = c, c++, pv = cv, cv += 3)
2403                 {
2404                         if (dist[p] >= 0)
2405                         {
2406                                 VectorCopy(pv, front[f]);
2407                                 f++;
2408                         }
2409                         if (dist[p] <= 0)
2410                         {
2411                                 VectorCopy(pv, back[b]);
2412                                 b++;
2413                         }
2414                         if (dist[p] == 0 || dist[c] == 0)
2415                                 continue;
2416                         if ((dist[p] > 0) != (dist[c] > 0) )
2417                         {
2418                                 // clip point
2419                                 frac = dist[p] / (dist[p] - dist[c]);
2420                                 front[f][0] = back[b][0] = pv[0] + frac * (cv[0] - pv[0]);
2421                                 front[f][1] = back[b][1] = pv[1] + frac * (cv[1] - pv[1]);
2422                                 front[f][2] = back[b][2] = pv[2] + frac * (cv[2] - pv[2]);
2423                                 f++;
2424                                 b++;
2425                         }
2426                 }
2427
2428                 SubdividePolygon(f, front[0]);
2429                 SubdividePolygon(b, back[0]);
2430                 return;
2431         }
2432
2433         i1 = subdivpolylookupvert(verts);
2434         i2 = subdivpolylookupvert(verts + 3);
2435         for (i = 2;i < numverts;i++)
2436         {
2437                 if (subdivpolytriangles >= MAX_SUBDIVPOLYTRIANGLES)
2438                 {
2439                         Con_Print("SubdividePolygon: ran out of triangles in buffer, please increase your r_subdivide_size\n");
2440                         return;
2441                 }
2442
2443                 i3 = subdivpolylookupvert(verts + i * 3);
2444                 subdivpolyindex[subdivpolytriangles][0] = i1;
2445                 subdivpolyindex[subdivpolytriangles][1] = i2;
2446                 subdivpolyindex[subdivpolytriangles][2] = i3;
2447                 i2 = i3;
2448                 subdivpolytriangles++;
2449         }
2450 }
2451
2452 //Breaks a polygon up along axial 64 unit
2453 //boundaries so that turbulent and sky warps
2454 //can be done reasonably.
2455 static void Mod_Q1BSP_GenerateWarpMesh(msurface_t *surface)
2456 {
2457         int i, j;
2458         surfvertex_t *v;
2459         surfmesh_t *mesh;
2460
2461         subdivpolytriangles = 0;
2462         subdivpolyverts = 0;
2463         SubdividePolygon(surface->num_vertices, (surface->mesh->data_vertex3f + 3 * surface->num_firstvertex));
2464         if (subdivpolytriangles < 1)
2465                 Host_Error("Mod_Q1BSP_GenerateWarpMesh: no triangles?");
2466
2467         surface->mesh = mesh = Mem_Alloc(loadmodel->mempool, sizeof(surfmesh_t) + subdivpolytriangles * sizeof(int[3]) + subdivpolyverts * sizeof(surfvertex_t));
2468         mesh->num_vertices = subdivpolyverts;
2469         mesh->num_triangles = subdivpolytriangles;
2470         mesh->vertex = (surfvertex_t *)(mesh + 1);
2471         mesh->index = (int *)(mesh->vertex + mesh->num_vertices);
2472         memset(mesh->vertex, 0, mesh->num_vertices * sizeof(surfvertex_t));
2473
2474         for (i = 0;i < mesh->num_triangles;i++)
2475                 for (j = 0;j < 3;j++)
2476                         mesh->index[i*3+j] = subdivpolyindex[i][j];
2477
2478         for (i = 0, v = mesh->vertex;i < subdivpolyverts;i++, v++)
2479         {
2480                 VectorCopy(subdivpolyvert[i], v->v);
2481                 v->st[0] = DotProduct(v->v, surface->lightmapinfo->texinfo->vecs[0]);
2482                 v->st[1] = DotProduct(v->v, surface->lightmapinfo->texinfo->vecs[1]);
2483         }
2484 }
2485 #endif
2486
2487 extern cvar_t gl_max_lightmapsize;
2488 static void Mod_Q1BSP_LoadFaces(sizebuf_t *sb)
2489 {
2490         msurface_t *surface;
2491         int i, j, count, surfacenum, planenum, smax, tmax, ssize, tsize, firstedge, numedges, totalverts, totaltris, lightmapnumber, lightmapsize, totallightmapsamples, lightmapoffset, texinfoindex;
2492         float texmins[2], texmaxs[2], val;
2493         rtexture_t *lightmaptexture, *deluxemaptexture;
2494         char vabuf[1024];
2495         int structsize = loadmodel->brush.isbsp2 ? 28 : 20;
2496
2497         if (sb->cursize % structsize)
2498                 Host_Error("Mod_Q1BSP_LoadFaces: funny lump size in %s",loadmodel->name);
2499         count = sb->cursize / structsize;
2500         loadmodel->data_surfaces = (msurface_t *)Mem_Alloc(loadmodel->mempool, count*sizeof(msurface_t));
2501         loadmodel->data_surfaces_lightmapinfo = (msurface_lightmapinfo_t *)Mem_Alloc(loadmodel->mempool, count*sizeof(msurface_lightmapinfo_t));
2502
2503         loadmodel->num_surfaces = count;
2504
2505         loadmodel->brushq1.firstrender = true;
2506         loadmodel->brushq1.lightmapupdateflags = (unsigned char *)Mem_Alloc(loadmodel->mempool, count*sizeof(unsigned char));
2507
2508         totalverts = 0;
2509         totaltris = 0;
2510         for (surfacenum = 0;surfacenum < count;surfacenum++)
2511         {
2512                 if (loadmodel->brush.isbsp2)
2513                         numedges = BuffLittleLong(sb->data + structsize * surfacenum + 12);
2514                 else
2515                         numedges = BuffLittleShort(sb->data + structsize * surfacenum + 8);
2516                 totalverts += numedges;
2517                 totaltris += numedges - 2;
2518         }
2519
2520         Mod_AllocSurfMesh(loadmodel->mempool, totalverts, totaltris, true, false, false);
2521
2522         lightmaptexture = NULL;
2523         deluxemaptexture = r_texture_blanknormalmap;
2524         lightmapnumber = 0;
2525         lightmapsize = bound(256, gl_max_lightmapsize.integer, (int)vid.maxtexturesize_2d);
2526         totallightmapsamples = 0;
2527
2528         totalverts = 0;
2529         totaltris = 0;
2530         for (surfacenum = 0, surface = loadmodel->data_surfaces;surfacenum < count;surfacenum++, surface++)
2531         {
2532                 surface->lightmapinfo = loadmodel->data_surfaces_lightmapinfo + surfacenum;
2533                 // the struct on disk is the same in BSP29 (Q1), BSP30 (HL1), and IBSP38 (Q2)
2534                 planenum = loadmodel->brush.isbsp2 ? MSG_ReadLittleLong(sb) : (unsigned short)MSG_ReadLittleShort(sb);
2535                 /*side = */loadmodel->brush.isbsp2 ? MSG_ReadLittleLong(sb) : (unsigned short)MSG_ReadLittleShort(sb);
2536                 firstedge = MSG_ReadLittleLong(sb);
2537                 numedges = loadmodel->brush.isbsp2 ? MSG_ReadLittleLong(sb) : (unsigned short)MSG_ReadLittleShort(sb);
2538                 texinfoindex = loadmodel->brush.isbsp2 ? MSG_ReadLittleLong(sb) : (unsigned short)MSG_ReadLittleShort(sb);
2539                 for (i = 0;i < MAXLIGHTMAPS;i++)
2540                         surface->lightmapinfo->styles[i] = MSG_ReadByte(sb);
2541                 lightmapoffset = MSG_ReadLittleLong(sb);
2542
2543                 // FIXME: validate edges, texinfo, etc?
2544                 if ((unsigned int) firstedge > (unsigned int) loadmodel->brushq1.numsurfedges || (unsigned int) numedges > (unsigned int) loadmodel->brushq1.numsurfedges || (unsigned int) firstedge + (unsigned int) numedges > (unsigned int) loadmodel->brushq1.numsurfedges)
2545                         Host_Error("Mod_Q1BSP_LoadFaces: invalid edge range (firstedge %i, numedges %i, model edges %i)", firstedge, numedges, loadmodel->brushq1.numsurfedges);
2546                 if ((unsigned int) texinfoindex >= (unsigned int) loadmodel->brushq1.numtexinfo)
2547                         Host_Error("Mod_Q1BSP_LoadFaces: invalid texinfo index %i(model has %i texinfos)", texinfoindex, loadmodel->brushq1.numtexinfo);
2548                 if ((unsigned int) planenum >= (unsigned int) loadmodel->brush.num_planes)
2549                         Host_Error("Mod_Q1BSP_LoadFaces: invalid plane index %i (model has %i planes)", planenum, loadmodel->brush.num_planes);
2550
2551                 surface->lightmapinfo->texinfo = loadmodel->brushq1.texinfo + texinfoindex;
2552                 surface->texture = loadmodel->data_textures + surface->lightmapinfo->texinfo->textureindex;
2553
2554                 // Q2BSP doesn't use lightmaps on sky or warped surfaces (water), but still has a lightofs of 0
2555                 if (lightmapoffset == 0 && (surface->texture->q2flags & (Q2SURF_SKY | Q2SURF_WARP)))
2556                         lightmapoffset = -1;
2557
2558                 //surface->flags = surface->texture->flags;
2559                 //if (LittleShort(in->side))
2560                 //      surface->flags |= SURF_PLANEBACK;
2561                 //surface->plane = loadmodel->brush.data_planes + planenum;
2562
2563                 surface->num_firstvertex = totalverts;
2564                 surface->num_vertices = numedges;
2565                 surface->num_firsttriangle = totaltris;
2566                 surface->num_triangles = numedges - 2;
2567                 totalverts += numedges;
2568                 totaltris += numedges - 2;
2569
2570                 // convert edges back to a normal polygon
2571                 for (i = 0;i < surface->num_vertices;i++)
2572                 {
2573                         int lindex = loadmodel->brushq1.surfedges[firstedge + i];
2574                         float s, t;
2575                         // note: the q1bsp format does not allow a 0 surfedge (it would have no negative counterpart)
2576                         if (lindex >= 0)
2577                                 VectorCopy(loadmodel->brushq1.vertexes[loadmodel->brushq1.edges[lindex].v[0]].position, (loadmodel->surfmesh.data_vertex3f + 3 * surface->num_firstvertex) + i * 3);
2578                         else
2579                                 VectorCopy(loadmodel->brushq1.vertexes[loadmodel->brushq1.edges[-lindex].v[1]].position, (loadmodel->surfmesh.data_vertex3f + 3 * surface->num_firstvertex) + i * 3);
2580                         s = DotProduct(((loadmodel->surfmesh.data_vertex3f + 3 * surface->num_firstvertex) + i * 3), surface->lightmapinfo->texinfo->vecs[0]) + surface->lightmapinfo->texinfo->vecs[0][3];
2581                         t = DotProduct(((loadmodel->surfmesh.data_vertex3f + 3 * surface->num_firstvertex) + i * 3), surface->lightmapinfo->texinfo->vecs[1]) + surface->lightmapinfo->texinfo->vecs[1][3];
2582                         (loadmodel->surfmesh.data_texcoordtexture2f + 2 * surface->num_firstvertex)[i * 2 + 0] = s / surface->texture->width;
2583                         (loadmodel->surfmesh.data_texcoordtexture2f + 2 * surface->num_firstvertex)[i * 2 + 1] = t / surface->texture->height;
2584                         (loadmodel->surfmesh.data_texcoordlightmap2f + 2 * surface->num_firstvertex)[i * 2 + 0] = 0;
2585                         (loadmodel->surfmesh.data_texcoordlightmap2f + 2 * surface->num_firstvertex)[i * 2 + 1] = 0;
2586                         (loadmodel->surfmesh.data_lightmapoffsets + surface->num_firstvertex)[i] = 0;
2587                 }
2588
2589                 for (i = 0;i < surface->num_triangles;i++)
2590                 {
2591                         (loadmodel->surfmesh.data_element3i + 3 * surface->num_firsttriangle)[i * 3 + 0] = 0 + surface->num_firstvertex;
2592                         (loadmodel->surfmesh.data_element3i + 3 * surface->num_firsttriangle)[i * 3 + 1] = i + 1 + surface->num_firstvertex;
2593                         (loadmodel->surfmesh.data_element3i + 3 * surface->num_firsttriangle)[i * 3 + 2] = i + 2 + surface->num_firstvertex;
2594                 }
2595
2596                 // compile additional data about the surface geometry
2597                 Mod_BuildNormals(surface->num_firstvertex, surface->num_vertices, surface->num_triangles, loadmodel->surfmesh.data_vertex3f, (loadmodel->surfmesh.data_element3i + 3 * surface->num_firsttriangle), loadmodel->surfmesh.data_normal3f, r_smoothnormals_areaweighting.integer != 0);
2598                 Mod_BuildTextureVectorsFromNormals(surface->num_firstvertex, surface->num_vertices, surface->num_triangles, loadmodel->surfmesh.data_vertex3f, loadmodel->surfmesh.data_texcoordtexture2f, loadmodel->surfmesh.data_normal3f, (loadmodel->surfmesh.data_element3i + 3 * surface->num_firsttriangle), loadmodel->surfmesh.data_svector3f, loadmodel->surfmesh.data_tvector3f, r_smoothnormals_areaweighting.integer != 0);
2599                 BoxFromPoints(surface->mins, surface->maxs, surface->num_vertices, (loadmodel->surfmesh.data_vertex3f + 3 * surface->num_firstvertex));
2600
2601                 // generate surface extents information
2602                 texmins[0] = texmaxs[0] = DotProduct((loadmodel->surfmesh.data_vertex3f + 3 * surface->num_firstvertex), surface->lightmapinfo->texinfo->vecs[0]) + surface->lightmapinfo->texinfo->vecs[0][3];
2603                 texmins[1] = texmaxs[1] = DotProduct((loadmodel->surfmesh.data_vertex3f + 3 * surface->num_firstvertex), surface->lightmapinfo->texinfo->vecs[1]) + surface->lightmapinfo->texinfo->vecs[1][3];
2604                 for (i = 1;i < surface->num_vertices;i++)
2605                 {
2606                         for (j = 0;j < 2;j++)
2607                         {
2608                                 val = DotProduct((loadmodel->surfmesh.data_vertex3f + 3 * surface->num_firstvertex) + i * 3, surface->lightmapinfo->texinfo->vecs[j]) + surface->lightmapinfo->texinfo->vecs[j][3];
2609                                 texmins[j] = min(texmins[j], val);
2610                                 texmaxs[j] = max(texmaxs[j], val);
2611                         }
2612                 }
2613                 for (i = 0;i < 2;i++)
2614                 {
2615                         surface->lightmapinfo->texturemins[i] = (int) floor(texmins[i] / 16.0) * 16;
2616                         surface->lightmapinfo->extents[i] = (int) ceil(texmaxs[i] / 16.0) * 16 - surface->lightmapinfo->texturemins[i];
2617                 }
2618
2619                 smax = surface->lightmapinfo->extents[0] >> 4;
2620                 tmax = surface->lightmapinfo->extents[1] >> 4;
2621                 ssize = (surface->lightmapinfo->extents[0] >> 4) + 1;
2622                 tsize = (surface->lightmapinfo->extents[1] >> 4) + 1;
2623
2624                 // lighting info
2625                 surface->lightmaptexture = NULL;
2626                 surface->deluxemaptexture = r_texture_blanknormalmap;
2627                 if (lightmapoffset == -1)
2628                 {
2629                         surface->lightmapinfo->samples = NULL;
2630 #if 1
2631                         // give non-lightmapped water a 1x white lightmap
2632                         if (!loadmodel->brush.isq2bsp && surface->texture->name[0] == '*' && (surface->lightmapinfo->texinfo->q1flags & TEX_SPECIAL) && ssize <= 256 && tsize <= 256)
2633                         {
2634                                 surface->lightmapinfo->samples = (unsigned char *)Mem_Alloc(loadmodel->mempool, ssize * tsize * 3);
2635                                 surface->lightmapinfo->styles[0] = 0;
2636                                 memset(surface->lightmapinfo->samples, 128, ssize * tsize * 3);
2637                         }
2638 #endif
2639                 }
2640                 else if (loadmodel->brush.ishlbsp || loadmodel->brush.isq2bsp) // LordHavoc: HalfLife map (bsp version 30)
2641                         surface->lightmapinfo->samples = loadmodel->brushq1.lightdata + lightmapoffset;
2642                 else // LordHavoc: white lighting (bsp version 29)
2643                 {
2644                         surface->lightmapinfo->samples = loadmodel->brushq1.lightdata + (lightmapoffset * 3);
2645                         if (loadmodel->brushq1.nmaplightdata)
2646                                 surface->lightmapinfo->nmapsamples = loadmodel->brushq1.nmaplightdata + (lightmapoffset * 3);
2647                 }
2648
2649                 // check if we should apply a lightmap to this
2650                 if (!(surface->lightmapinfo->texinfo->q1flags & TEX_SPECIAL) || surface->lightmapinfo->samples)
2651                 {
2652                         if (ssize > 256 || tsize > 256)
2653                                 Host_Error("Bad surface extents");
2654
2655                         if (lightmapsize < ssize)
2656                                 lightmapsize = ssize;
2657                         if (lightmapsize < tsize)
2658                                 lightmapsize = tsize;
2659
2660                         totallightmapsamples += ssize*tsize;
2661
2662                         // force lightmap upload on first time seeing the surface
2663                         //
2664                         // additionally this is used by the later code to see if a
2665                         // lightmap is needed on this surface (rather than duplicating the
2666                         // logic above)
2667                         loadmodel->brushq1.lightmapupdateflags[surfacenum] = true;
2668                         loadmodel->lit = true;
2669                 }
2670         }
2671
2672         // small maps (such as ammo boxes especially) don't need big lightmap
2673         // textures, so this code tries to guess a good size based on
2674         // totallightmapsamples (size of the lightmaps lump basically), as well as
2675         // trying to max out the size if there is a lot of lightmap data to store
2676         // additionally, never choose a lightmapsize that is smaller than the
2677         // largest surface encountered (as it would fail)
2678         i = lightmapsize;
2679         for (lightmapsize = 64; (lightmapsize < i) && (lightmapsize < bound(128, gl_max_lightmapsize.integer, (int)vid.maxtexturesize_2d)) && (totallightmapsamples > lightmapsize*lightmapsize); lightmapsize*=2)
2680                 ;
2681
2682         // now that we've decided the lightmap texture size, we can do the rest
2683         if (cls.state != ca_dedicated)
2684         {
2685                 int stainmapsize = 0;
2686                 mod_alloclightmap_state_t allocState;
2687
2688                 Mod_AllocLightmap_Init(&allocState, loadmodel->mempool, lightmapsize, lightmapsize);
2689                 for (surfacenum = 0, surface = loadmodel->data_surfaces;surfacenum < count;surfacenum++, surface++)
2690                 {
2691                         int iu, iv, lightmapx = 0, lightmapy = 0;
2692                         float u, v, ubase, vbase, uscale, vscale;
2693
2694                         if (!loadmodel->brushq1.lightmapupdateflags[surfacenum])
2695                                 continue;
2696
2697                         smax = surface->lightmapinfo->extents[0] >> 4;
2698                         tmax = surface->lightmapinfo->extents[1] >> 4;
2699                         ssize = (surface->lightmapinfo->extents[0] >> 4) + 1;
2700                         tsize = (surface->lightmapinfo->extents[1] >> 4) + 1;
2701                         stainmapsize += ssize * tsize * 3;
2702
2703                         if (!lightmaptexture || !Mod_AllocLightmap_Block(&allocState, ssize, tsize, &lightmapx, &lightmapy))
2704                         {
2705                                 // allocate a texture pool if we need it
2706                                 if (loadmodel->texturepool == NULL)
2707                                         loadmodel->texturepool = R_AllocTexturePool();
2708                                 // could not find room, make a new lightmap
2709                                 loadmodel->brushq3.num_mergedlightmaps = lightmapnumber + 1;
2710                                 loadmodel->brushq3.data_lightmaps = (rtexture_t **)Mem_Realloc(loadmodel->mempool, loadmodel->brushq3.data_lightmaps, loadmodel->brushq3.num_mergedlightmaps * sizeof(loadmodel->brushq3.data_lightmaps[0]));
2711                                 loadmodel->brushq3.data_deluxemaps = (rtexture_t **)Mem_Realloc(loadmodel->mempool, loadmodel->brushq3.data_deluxemaps, loadmodel->brushq3.num_mergedlightmaps * sizeof(loadmodel->brushq3.data_deluxemaps[0]));
2712                                 loadmodel->brushq3.data_lightmaps[lightmapnumber] = lightmaptexture = R_LoadTexture2D(loadmodel->texturepool, va(vabuf, sizeof(vabuf), "lightmap%i", lightmapnumber), lightmapsize, lightmapsize, NULL, TEXTYPE_BGRA, TEXF_FORCELINEAR | TEXF_ALLOWUPDATES, -1, NULL);
2713                                 if (loadmodel->brushq1.nmaplightdata)
2714                                         loadmodel->brushq3.data_deluxemaps[lightmapnumber] = deluxemaptexture = R_LoadTexture2D(loadmodel->texturepool, va(vabuf, sizeof(vabuf), "deluxemap%i", lightmapnumber), lightmapsize, lightmapsize, NULL, TEXTYPE_BGRA, TEXF_FORCELINEAR | TEXF_ALLOWUPDATES, -1, NULL);
2715                                 lightmapnumber++;
2716                                 Mod_AllocLightmap_Reset(&allocState);
2717                                 Mod_AllocLightmap_Block(&allocState, ssize, tsize, &lightmapx, &lightmapy);
2718                         }
2719                         surface->lightmaptexture = lightmaptexture;
2720                         surface->deluxemaptexture = deluxemaptexture;
2721                         surface->lightmapinfo->lightmaporigin[0] = lightmapx;
2722                         surface->lightmapinfo->lightmaporigin[1] = lightmapy;
2723
2724                         uscale = 1.0f / (float)lightmapsize;
2725                         vscale = 1.0f / (float)lightmapsize;
2726                         ubase = lightmapx * uscale;
2727                         vbase = lightmapy * vscale;
2728
2729                         for (i = 0;i < surface->num_vertices;i++)
2730                         {
2731                                 u = ((DotProduct(((loadmodel->surfmesh.data_vertex3f + 3 * surface->num_firstvertex) + i * 3), surface->lightmapinfo->texinfo->vecs[0]) + surface->lightmapinfo->texinfo->vecs[0][3]) + 8 - surface->lightmapinfo->texturemins[0]) * (1.0 / 16.0);
2732                                 v = ((DotProduct(((loadmodel->surfmesh.data_vertex3f + 3 * surface->num_firstvertex) + i * 3), surface->lightmapinfo->texinfo->vecs[1]) + surface->lightmapinfo->texinfo->vecs[1][3]) + 8 - surface->lightmapinfo->texturemins[1]) * (1.0 / 16.0);
2733                                 (loadmodel->surfmesh.data_texcoordlightmap2f + 2 * surface->num_firstvertex)[i * 2 + 0] = u * uscale + ubase;
2734                                 (loadmodel->surfmesh.data_texcoordlightmap2f + 2 * surface->num_firstvertex)[i * 2 + 1] = v * vscale + vbase;
2735                                 // LordHavoc: calc lightmap data offset for vertex lighting to use
2736                                 iu = (int) u;
2737                                 iv = (int) v;
2738                                 (loadmodel->surfmesh.data_lightmapoffsets + surface->num_firstvertex)[i] = (bound(0, iv, tmax) * ssize + bound(0, iu, smax)) * 3;
2739                         }
2740                 }
2741
2742                 if (cl_stainmaps.integer)
2743                 {
2744                         // allocate stainmaps for permanent marks on walls and clear white
2745                         unsigned char *stainsamples = NULL;
2746                         stainsamples = (unsigned char *)Mem_Alloc(loadmodel->mempool, stainmapsize);
2747                         memset(stainsamples, 255, stainmapsize);
2748                         // assign pointers
2749                         for (surfacenum = 0, surface = loadmodel->data_surfaces;surfacenum < count;surfacenum++, surface++)
2750                         {
2751                                 if (!loadmodel->brushq1.lightmapupdateflags[surfacenum])
2752                                         continue;
2753                                 ssize = (surface->lightmapinfo->extents[0] >> 4) + 1;
2754                                 tsize = (surface->lightmapinfo->extents[1] >> 4) + 1;
2755                                 surface->lightmapinfo->stainsamples = stainsamples;
2756                                 stainsamples += ssize * tsize * 3;
2757                         }
2758                 }
2759         }
2760
2761         // generate ushort elements array if possible
2762         if (loadmodel->surfmesh.data_element3s)
2763                 for (i = 0;i < loadmodel->surfmesh.num_triangles*3;i++)
2764                         loadmodel->surfmesh.data_element3s[i] = loadmodel->surfmesh.data_element3i[i];
2765 }
2766
2767 static void Mod_Q1BSP_LoadNodes_RecursiveSetParent(mnode_t *node, mnode_t *parent)
2768 {
2769         //if (node->parent)
2770         //      Host_Error("Mod_Q1BSP_LoadNodes_RecursiveSetParent: runaway recursion");
2771         node->parent = parent;
2772         if (node->plane)
2773         {
2774                 // this is a node, recurse to children
2775                 Mod_Q1BSP_LoadNodes_RecursiveSetParent(node->children[0], node);
2776                 Mod_Q1BSP_LoadNodes_RecursiveSetParent(node->children[1], node);
2777                 // combine supercontents of children
2778                 node->combinedsupercontents = node->children[0]->combinedsupercontents | node->children[1]->combinedsupercontents;
2779         }
2780         else
2781         {
2782                 int j;
2783                 mleaf_t *leaf = (mleaf_t *)node;
2784                 // if this is a leaf, calculate supercontents mask from all collidable
2785                 // primitives in the leaf (brushes and collision surfaces)
2786                 // also flag if the leaf contains any collision surfaces
2787                 leaf->combinedsupercontents = 0;
2788                 // combine the supercontents values of all brushes in this leaf
2789                 for (j = 0;j < leaf->numleafbrushes;j++)
2790                         leaf->combinedsupercontents |= loadmodel->brush.data_brushes[leaf->firstleafbrush[j]].texture->supercontents;
2791                 // check if this leaf contains any collision surfaces (q3 patches)
2792                 for (j = 0;j < leaf->numleafsurfaces;j++)
2793                 {
2794                         msurface_t *surface = loadmodel->data_surfaces + leaf->firstleafsurface[j];
2795                         if (surface->num_collisiontriangles)
2796                         {
2797                                 leaf->containscollisionsurfaces = true;
2798                                 leaf->combinedsupercontents |= surface->texture->supercontents;
2799                         }
2800                 }
2801         }
2802 }
2803
2804 static void Mod_Q1BSP_LoadNodes(sizebuf_t *sb)
2805 {
2806         int                     i, j, count, p, child[2];
2807         mnode_t         *out;
2808         int structsize = loadmodel->brush.isbsp2rmqe ? 32 : (loadmodel->brush.isbsp2 ? 44 : 24);
2809
2810         if (sb->cursize % structsize)
2811                 Host_Error("Mod_Q1BSP_LoadNodes: funny lump size in %s",loadmodel->name);
2812         count = sb->cursize / structsize;
2813         if (count == 0)
2814                 Host_Error("Mod_Q1BSP_LoadNodes: missing BSP tree in %s",loadmodel->name);
2815         out = (mnode_t *)Mem_Alloc(loadmodel->mempool, count*sizeof(*out));
2816
2817         loadmodel->brush.data_nodes = out;
2818         loadmodel->brush.num_nodes = count;
2819
2820         for ( i=0 ; i<count ; i++, out++)
2821         {
2822                 p = MSG_ReadLittleLong(sb);
2823                 out->plane = loadmodel->brush.data_planes + p;
2824
2825                 if (loadmodel->brush.isbsp2rmqe)
2826                 {
2827                         child[0] = MSG_ReadLittleLong(sb);
2828                         child[1] = MSG_ReadLittleLong(sb);
2829                         out->mins[0] = MSG_ReadLittleShort(sb);
2830                         out->mins[1] = MSG_ReadLittleShort(sb);
2831                         out->mins[2] = MSG_ReadLittleShort(sb);
2832                         out->maxs[0] = MSG_ReadLittleShort(sb);
2833                         out->maxs[1] = MSG_ReadLittleShort(sb);
2834                         out->maxs[2] = MSG_ReadLittleShort(sb);
2835                         out->firstsurface = MSG_ReadLittleLong(sb);
2836                         out->numsurfaces = MSG_ReadLittleLong(sb);
2837                 }
2838                 else if (loadmodel->brush.isbsp2)
2839                 {
2840                         child[0] = MSG_ReadLittleLong(sb);
2841                         child[1] = MSG_ReadLittleLong(sb);
2842                         out->mins[0] = MSG_ReadLittleFloat(sb);
2843                         out->mins[1] = MSG_ReadLittleFloat(sb);
2844                         out->mins[2] = MSG_ReadLittleFloat(sb);
2845                         out->maxs[0] = MSG_ReadLittleFloat(sb);
2846                         out->maxs[1] = MSG_ReadLittleFloat(sb);
2847                         out->maxs[2] = MSG_ReadLittleFloat(sb);
2848                         out->firstsurface = MSG_ReadLittleLong(sb);
2849                         out->numsurfaces = MSG_ReadLittleLong(sb);
2850                 }
2851                 else
2852                 {
2853                         child[0] = (unsigned short)MSG_ReadLittleShort(sb);
2854                         child[1] = (unsigned short)MSG_ReadLittleShort(sb);
2855                         if (child[0] >= count)
2856                                 child[0] -= 65536;
2857                         if (child[1] >= count)
2858                                 child[1] -= 65536;
2859
2860                         out->mins[0] = MSG_ReadLittleShort(sb);
2861                         out->mins[1] = MSG_ReadLittleShort(sb);
2862                         out->mins[2] = MSG_ReadLittleShort(sb);
2863                         out->maxs[0] = MSG_ReadLittleShort(sb);
2864                         out->maxs[1] = MSG_ReadLittleShort(sb);
2865                         out->maxs[2] = MSG_ReadLittleShort(sb);
2866
2867                         out->firstsurface = (unsigned short)MSG_ReadLittleShort(sb);
2868                         out->numsurfaces = (unsigned short)MSG_ReadLittleShort(sb);
2869                 }
2870
2871                 for (j=0 ; j<2 ; j++)
2872                 {
2873                         // LordHavoc: this code supports broken bsp files produced by
2874                         // arguire qbsp which can produce more than 32768 nodes, any value
2875                         // below count is assumed to be a node number, any other value is
2876                         // assumed to be a leaf number
2877                         p = child[j];
2878                         if (p >= 0)
2879                         {
2880                                 if (p < loadmodel->brush.num_nodes)
2881                                         out->children[j] = loadmodel->brush.data_nodes + p;
2882                                 else
2883                                 {
2884                                         Con_Printf("Mod_Q1BSP_LoadNodes: invalid node index %i (file has only %i nodes)\n", p, loadmodel->brush.num_nodes);
2885                                         // map it to the solid leaf
2886                                         out->children[j] = (mnode_t *)loadmodel->brush.data_leafs;
2887                                 }
2888                         }
2889                         else
2890                         {
2891                                 // get leaf index as a positive value starting at 0 (-1 becomes 0, -2 becomes 1, etc)
2892                                 p = -(p+1);
2893                                 if (p < loadmodel->brush.num_leafs)
2894                                         out->children[j] = (mnode_t *)(loadmodel->brush.data_leafs + p);
2895                                 else
2896                                 {
2897                                         Con_Printf("Mod_Q1BSP_LoadNodes: invalid leaf index %i (file has only %i leafs)\n", p, loadmodel->brush.num_leafs);
2898                                         // map it to the solid leaf
2899                                         out->children[j] = (mnode_t *)loadmodel->brush.data_leafs;
2900                                 }
2901                         }
2902                 }
2903         }
2904
2905         Mod_Q1BSP_LoadNodes_RecursiveSetParent(loadmodel->brush.data_nodes, NULL);      // sets nodes and leafs
2906 }
2907
2908 static void Mod_Q1BSP_LoadLeafs(sizebuf_t *sb)
2909 {
2910         mleaf_t *out;
2911         int i, j, count, p, firstmarksurface, nummarksurfaces;
2912         int structsize = loadmodel->brush.isbsp2rmqe ? 32 : (loadmodel->brush.isbsp2 ? 44 : 28);
2913
2914         if (sb->cursize % structsize)
2915                 Host_Error("Mod_Q1BSP_LoadLeafs: funny lump size in %s",loadmodel->name);
2916         count = sb->cursize / structsize;
2917         out = (mleaf_t *)Mem_Alloc(loadmodel->mempool, count*sizeof(*out));
2918
2919         loadmodel->brush.data_leafs = out;
2920         loadmodel->brush.num_leafs = count;
2921         // get visleafs from the submodel data
2922         loadmodel->brush.num_pvsclusters = loadmodel->brushq1.submodels[0].visleafs;
2923         loadmodel->brush.num_pvsclusterbytes = (loadmodel->brush.num_pvsclusters+7)>>3;
2924         loadmodel->brush.data_pvsclusters = (unsigned char *)Mem_Alloc(loadmodel->mempool, loadmodel->brush.num_pvsclusters * loadmodel->brush.num_pvsclusterbytes);
2925         memset(loadmodel->brush.data_pvsclusters, 0xFF, loadmodel->brush.num_pvsclusters * loadmodel->brush.num_pvsclusterbytes);
2926
2927         // FIXME: this function could really benefit from some error checking
2928         for ( i=0 ; i<count ; i++, out++)
2929         {
2930                 out->contents = MSG_ReadLittleLong(sb);
2931
2932                 out->clusterindex = i - 1;
2933                 if (out->clusterindex >= loadmodel->brush.num_pvsclusters)
2934                         out->clusterindex = -1;
2935
2936                 p = MSG_ReadLittleLong(sb);
2937                 // ignore visofs errors on leaf 0 (solid)
2938                 if (p >= 0 && out->clusterindex >= 0)
2939                 {
2940                         if (p >= loadmodel->brushq1.num_compressedpvs)
2941                                 Con_Print("Mod_Q1BSP_LoadLeafs: invalid visofs\n");
2942                         else
2943                                 Mod_Q1BSP_DecompressVis(loadmodel->brushq1.data_compressedpvs + p, loadmodel->brushq1.data_compressedpvs + loadmodel->brushq1.num_compressedpvs, loadmodel->brush.data_pvsclusters + out->clusterindex * loadmodel->brush.num_pvsclusterbytes, loadmodel->brush.data_pvsclusters + (out->clusterindex + 1) * loadmodel->brush.num_pvsclusterbytes);
2944                 }
2945
2946                 if (loadmodel->brush.isbsp2rmqe)
2947                 {
2948                         out->mins[0] = MSG_ReadLittleShort(sb);
2949                         out->mins[1] = MSG_ReadLittleShort(sb);
2950                         out->mins[2] = MSG_ReadLittleShort(sb);
2951                         out->maxs[0] = MSG_ReadLittleShort(sb);
2952                         out->maxs[1] = MSG_ReadLittleShort(sb);
2953                         out->maxs[2] = MSG_ReadLittleShort(sb);
2954
2955                         firstmarksurface = MSG_ReadLittleLong(sb);
2956                         nummarksurfaces = MSG_ReadLittleLong(sb);
2957                 }
2958                 else if (loadmodel->brush.isbsp2)
2959                 {
2960                         out->mins[0] = MSG_ReadLittleFloat(sb);
2961                         out->mins[1] = MSG_ReadLittleFloat(sb);
2962                         out->mins[2] = MSG_ReadLittleFloat(sb);
2963                         out->maxs[0] = MSG_ReadLittleFloat(sb);
2964                         out->maxs[1] = MSG_ReadLittleFloat(sb);
2965                         out->maxs[2] = MSG_ReadLittleFloat(sb);
2966
2967                         firstmarksurface = MSG_ReadLittleLong(sb);
2968                         nummarksurfaces = MSG_ReadLittleLong(sb);
2969                 }
2970                 else
2971                 {
2972                         out->mins[0] = MSG_ReadLittleShort(sb);
2973                         out->mins[1] = MSG_ReadLittleShort(sb);
2974                         out->mins[2] = MSG_ReadLittleShort(sb);
2975                         out->maxs[0] = MSG_ReadLittleShort(sb);
2976                         out->maxs[1] = MSG_ReadLittleShort(sb);
2977                         out->maxs[2] = MSG_ReadLittleShort(sb);
2978
2979                         firstmarksurface = (unsigned short)MSG_ReadLittleShort(sb);
2980                         nummarksurfaces  = (unsigned short)MSG_ReadLittleShort(sb);
2981                 }
2982
2983                 if (firstmarksurface >= 0 && firstmarksurface + nummarksurfaces <= loadmodel->brush.num_leafsurfaces)
2984                 {
2985                         out->firstleafsurface = loadmodel->brush.data_leafsurfaces + firstmarksurface;
2986                         out->numleafsurfaces = nummarksurfaces;
2987                 }
2988                 else
2989                 {
2990                         Con_Printf("Mod_Q1BSP_LoadLeafs: invalid leafsurface range %i:%i outside range %i:%i\n", firstmarksurface, firstmarksurface+nummarksurfaces, 0, loadmodel->brush.num_leafsurfaces);
2991                         out->firstleafsurface = NULL;
2992                         out->numleafsurfaces = 0;
2993                 }
2994
2995                 for (j = 0;j < 4;j++)
2996                         out->ambient_sound_level[j] = MSG_ReadByte(sb);
2997         }
2998 }
2999
3000 static qboolean Mod_Q1BSP_CheckWaterAlphaSupport(void)
3001 {
3002         int i, j;
3003         mleaf_t *leaf;
3004         const unsigned char *pvs;
3005         // if there's no vis data, assume supported (because everything is visible all the time)
3006         if (!loadmodel->brush.data_pvsclusters)
3007                 return true;
3008         // check all liquid leafs to see if they can see into empty leafs, if any
3009         // can we can assume this map supports r_wateralpha
3010         for (i = 0, leaf = loadmodel->brush.data_leafs;i < loadmodel->brush.num_leafs;i++, leaf++)
3011         {
3012                 if ((leaf->contents == CONTENTS_WATER || leaf->contents == CONTENTS_SLIME) && leaf->clusterindex >= 0)
3013                 {
3014                         pvs = loadmodel->brush.data_pvsclusters + leaf->clusterindex * loadmodel->brush.num_pvsclusterbytes;
3015                         for (j = 0;j < loadmodel->brush.num_leafs;j++)
3016                                 if (CHECKPVSBIT(pvs, loadmodel->brush.data_leafs[j].clusterindex) && loadmodel->brush.data_leafs[j].contents == CONTENTS_EMPTY)
3017                                         return true;
3018                 }
3019         }
3020         return false;
3021 }
3022
3023 static void Mod_Q1BSP_LoadClipnodes(sizebuf_t *sb, hullinfo_t *hullinfo)
3024 {
3025         mclipnode_t *out;
3026         int                     i, count;
3027         hull_t          *hull;
3028         int structsize = loadmodel->brush.isbsp2 ? 12 : 8;
3029
3030         if (sb->cursize % structsize)
3031                 Host_Error("Mod_Q1BSP_LoadClipnodes: funny lump size in %s",loadmodel->name);
3032         count = sb->cursize / structsize;
3033         out = (mclipnode_t *)Mem_Alloc(loadmodel->mempool, count*sizeof(*out));
3034
3035         loadmodel->brushq1.clipnodes = out;
3036         loadmodel->brushq1.numclipnodes = count;
3037
3038         for (i = 1; i < MAX_MAP_HULLS; i++)
3039         {
3040                 hull = &loadmodel->brushq1.hulls[i];
3041                 hull->clipnodes = out;
3042                 hull->firstclipnode = 0;
3043                 hull->lastclipnode = count-1;
3044                 hull->planes = loadmodel->brush.data_planes;
3045                 hull->clip_mins[0] = hullinfo->hullsizes[i][0][0];
3046                 hull->clip_mins[1] = hullinfo->hullsizes[i][0][1];
3047                 hull->clip_mins[2] = hullinfo->hullsizes[i][0][2];
3048                 hull->clip_maxs[0] = hullinfo->hullsizes[i][1][0];
3049                 hull->clip_maxs[1] = hullinfo->hullsizes[i][1][1];
3050                 hull->clip_maxs[2] = hullinfo->hullsizes[i][1][2];
3051                 VectorSubtract(hull->clip_maxs, hull->clip_mins, hull->clip_size);
3052         }
3053
3054         for (i=0 ; i<count ; i++, out++)
3055         {
3056                 out->planenum = MSG_ReadLittleLong(sb);
3057                 if (out->planenum < 0 || out->planenum >= loadmodel->brush.num_planes)
3058                         Host_Error("%s: Corrupt clipping hull(out of range planenum)", loadmodel->name);
3059                 if (loadmodel->brush.isbsp2)
3060                 {
3061                         out->children[0] = MSG_ReadLittleLong(sb);
3062                         out->children[1] = MSG_ReadLittleLong(sb);
3063                         if (out->children[0] >= count)
3064                                 Host_Error("%s: Corrupt clipping hull (invalid child index)", loadmodel->name);
3065                         if (out->children[1] >= count)
3066                                 Host_Error("%s: Corrupt clipping hull (invalid child index)", loadmodel->name);
3067                 }
3068                 else
3069                 {
3070                         // LordHavoc: this code supports arguire qbsp's broken clipnodes indices (more than 32768 clipnodes), values above count are assumed to be contents values
3071                         out->children[0] = (unsigned short)MSG_ReadLittleShort(sb);
3072                         out->children[1] = (unsigned short)MSG_ReadLittleShort(sb);
3073                         if (out->children[0] >= count)
3074                                 out->children[0] -= 65536;
3075                         if (out->children[1] >= count)
3076                                 out->children[1] -= 65536;
3077                 }
3078         }
3079 }
3080
3081 //Duplicate the drawing hull structure as a clipping hull
3082 static void Mod_Q1BSP_MakeHull0(void)
3083 {
3084         mnode_t         *in;
3085         mclipnode_t *out;
3086         int                     i;
3087         hull_t          *hull;
3088
3089         hull = &loadmodel->brushq1.hulls[0];
3090
3091         in = loadmodel->brush.data_nodes;
3092         out = (mclipnode_t *)Mem_Alloc(loadmodel->mempool, loadmodel->brush.num_nodes * sizeof(*out));
3093
3094         hull->clipnodes = out;
3095         hull->firstclipnode = 0;
3096         hull->lastclipnode = loadmodel->brush.num_nodes - 1;
3097         hull->planes = loadmodel->brush.data_planes;
3098
3099         for (i = 0;i < loadmodel->brush.num_nodes;i++, out++, in++)
3100         {
3101                 out->planenum = in->plane - loadmodel->brush.data_planes;
3102                 out->children[0] = in->children[0]->plane ? in->children[0] - loadmodel->brush.data_nodes : ((mleaf_t *)in->children[0])->contents;
3103                 out->children[1] = in->children[1]->plane ? in->children[1] - loadmodel->brush.data_nodes : ((mleaf_t *)in->children[1])->contents;
3104         }
3105 }
3106
3107 static void Mod_Q1BSP_LoadLeaffaces(sizebuf_t *sb)
3108 {
3109         int i, j;
3110         int structsize = loadmodel->brush.isbsp2 ? 4 : 2;
3111
3112         if (sb->cursize % structsize)
3113                 Host_Error("Mod_Q1BSP_LoadLeaffaces: funny lump size in %s",loadmodel->name);
3114         loadmodel->brush.num_leafsurfaces = sb->cursize / structsize;
3115         loadmodel->brush.data_leafsurfaces = (int *)Mem_Alloc(loadmodel->mempool, loadmodel->brush.num_leafsurfaces * sizeof(int));
3116
3117         if (loadmodel->brush.isbsp2)
3118         {
3119                 for (i = 0;i < loadmodel->brush.num_leafsurfaces;i++)
3120                 {
3121                         j = MSG_ReadLittleLong(sb);
3122                         if (j < 0 || j >= loadmodel->num_surfaces)
3123                                 Host_Error("Mod_Q1BSP_LoadLeaffaces: bad surface number");
3124                         loadmodel->brush.data_leafsurfaces[i] = j;
3125                 }
3126         }
3127         else
3128         {
3129                 for (i = 0;i < loadmodel->brush.num_leafsurfaces;i++)
3130                 {
3131                         j = (unsigned short) MSG_ReadLittleShort(sb);
3132                         if (j >= loadmodel->num_surfaces)
3133                                 Host_Error("Mod_Q1BSP_LoadLeaffaces: bad surface number");
3134                         loadmodel->brush.data_leafsurfaces[i] = j;
3135                 }
3136         }
3137 }
3138
3139 static void Mod_Q1BSP_LoadSurfedges(sizebuf_t *sb)
3140 {
3141         int             i;
3142         int structsize = 4;
3143
3144         if (sb->cursize % structsize)
3145                 Host_Error("Mod_Q1BSP_LoadSurfedges: funny lump size in %s",loadmodel->name);
3146         loadmodel->brushq1.numsurfedges = sb->cursize / structsize;
3147         loadmodel->brushq1.surfedges = (int *)Mem_Alloc(loadmodel->mempool, loadmodel->brushq1.numsurfedges * sizeof(int));
3148
3149         for (i = 0;i < loadmodel->brushq1.numsurfedges;i++)
3150                 loadmodel->brushq1.surfedges[i] = MSG_ReadLittleLong(sb);
3151 }
3152
3153
3154 static void Mod_Q1BSP_LoadPlanes(sizebuf_t *sb)
3155 {
3156         int                     i;
3157         mplane_t        *out;
3158         int structsize = 20;
3159
3160         if (sb->cursize % structsize)
3161                 Host_Error("Mod_Q1BSP_LoadPlanes: funny lump size in %s", loadmodel->name);
3162         loadmodel->brush.num_planes = sb->cursize / structsize;
3163         loadmodel->brush.data_planes = out = (mplane_t *)Mem_Alloc(loadmodel->mempool, loadmodel->brush.num_planes * sizeof(*out));
3164
3165         for (i = 0;i < loadmodel->brush.num_planes;i++, out++)
3166         {
3167                 out->normal[0] = MSG_ReadLittleFloat(sb);
3168                 out->normal[1] = MSG_ReadLittleFloat(sb);
3169                 out->normal[2] = MSG_ReadLittleFloat(sb);
3170                 out->dist = MSG_ReadLittleFloat(sb);
3171                 MSG_ReadLittleLong(sb); // type is not used, we use PlaneClassify
3172                 PlaneClassify(out);
3173         }
3174 }
3175
3176 static void Mod_Q1BSP_LoadMapBrushes(void)
3177 {
3178 #if 0
3179 // unfinished
3180         int submodel, numbrushes;
3181         qboolean firstbrush;
3182         char *text, *maptext;
3183         char mapfilename[MAX_QPATH];
3184         FS_StripExtension (loadmodel->name, mapfilename, sizeof (mapfilename));
3185         strlcat (mapfilename, ".map", sizeof (mapfilename));
3186         maptext = (unsigned char*) FS_LoadFile(mapfilename, tempmempool, false, NULL);
3187         if (!maptext)
3188                 return;
3189         text = maptext;
3190         if (!COM_ParseToken_Simple(&data, false, false, true))
3191                 return; // error
3192         submodel = 0;
3193         for (;;)
3194         {
3195                 if (!COM_ParseToken_Simple(&data, false, false, true))
3196                         break;
3197                 if (com_token[0] != '{')
3198                         return; // error
3199                 // entity
3200                 firstbrush = true;
3201                 numbrushes = 0;
3202                 maxbrushes = 256;
3203                 brushes = Mem_Alloc(loadmodel->mempool, maxbrushes * sizeof(mbrush_t));
3204                 for (;;)
3205                 {
3206                         if (!COM_ParseToken_Simple(&data, false, false, true))
3207                                 return; // error
3208                         if (com_token[0] == '}')
3209                                 break; // end of entity
3210                         if (com_token[0] == '{')
3211                         {
3212                                 // brush
3213                                 if (firstbrush)
3214                                 {
3215                                         if (submodel)
3216                                         {
3217                                                 if (submodel > loadmodel->brush.numsubmodels)
3218                                                 {
3219                                                         Con_Printf("Mod_Q1BSP_LoadMapBrushes: .map has more submodels than .bsp!\n");
3220                                                         model = NULL;
3221                                                 }
3222                                                 else
3223                                                         model = loadmodel->brush.submodels[submodel];
3224                                         }
3225                                         else
3226                                                 model = loadmodel;
3227                                 }
3228                                 for (;;)
3229                                 {
3230                                         if (!COM_ParseToken_Simple(&data, false, false, true))
3231                                                 return; // error
3232                                         if (com_token[0] == '}')
3233                                                 break; // end of brush
3234                                         // each brush face should be this format:
3235                                         // ( x y z ) ( x y z ) ( x y z ) texture scroll_s scroll_t rotateangle scale_s scale_t
3236                                         // FIXME: support hl .map format
3237                                         for (pointnum = 0;pointnum < 3;pointnum++)
3238                                         {
3239                                                 COM_ParseToken_Simple(&data, false, false, true);
3240                                                 for (componentnum = 0;componentnum < 3;componentnum++)
3241                                                 {
3242                                                         COM_ParseToken_Simple(&data, false, false, true);
3243                                                         point[pointnum][componentnum] = atof(com_token);
3244                                                 }
3245                                                 COM_ParseToken_Simple(&data, false, false, true);
3246                                         }
3247                                         COM_ParseToken_Simple(&data, false, false, true);
3248                                         strlcpy(facetexture, com_token, sizeof(facetexture));
3249                                         COM_ParseToken_Simple(&data, false, false, true);
3250                                         //scroll_s = atof(com_token);
3251                                         COM_ParseToken_Simple(&data, false, false, true);
3252                                         //scroll_t = atof(com_token);
3253                                         COM_ParseToken_Simple(&data, false, false, true);
3254                                         //rotate = atof(com_token);
3255                                         COM_ParseToken_Simple(&data, false, false, true);
3256                                         //scale_s = atof(com_token);
3257                                         COM_ParseToken_Simple(&data, false, false, true);
3258                                         //scale_t = atof(com_token);
3259                                         TriangleNormal(point[0], point[1], point[2], planenormal);
3260                                         VectorNormalizeDouble(planenormal);
3261                                         planedist = DotProduct(point[0], planenormal);
3262                                         //ChooseTexturePlane(planenormal, texturevector[0], texturevector[1]);
3263                                 }
3264                                 continue;
3265                         }
3266                 }
3267         }
3268 #endif
3269 }
3270
3271
3272 #define MAX_PORTALPOINTS 64
3273
3274 typedef struct portal_s
3275 {
3276         mplane_t plane;
3277         mnode_t *nodes[2];              // [0] = front side of plane
3278         struct portal_s *next[2];
3279         int numpoints;
3280         double points[3*MAX_PORTALPOINTS];
3281         struct portal_s *chain; // all portals are linked into a list
3282 }
3283 portal_t;
3284
3285 static memexpandablearray_t portalarray;
3286
3287 static void Mod_Q1BSP_RecursiveRecalcNodeBBox(mnode_t *node)
3288 {
3289         // process only nodes (leafs already had their box calculated)
3290         if (!node->plane)
3291                 return;
3292
3293         // calculate children first
3294         Mod_Q1BSP_RecursiveRecalcNodeBBox(node->children[0]);
3295         Mod_Q1BSP_RecursiveRecalcNodeBBox(node->children[1]);
3296
3297         // make combined bounding box from children
3298         node->mins[0] = min(node->children[0]->mins[0], node->children[1]->mins[0]);
3299         node->mins[1] = min(node->children[0]->mins[1], node->children[1]->mins[1]);
3300         node->mins[2] = min(node->children[0]->mins[2], node->children[1]->mins[2]);
3301         node->maxs[0] = max(node->children[0]->maxs[0], node->children[1]->maxs[0]);
3302         node->maxs[1] = max(node->children[0]->maxs[1], node->children[1]->maxs[1]);
3303         node->maxs[2] = max(node->children[0]->maxs[2], node->children[1]->maxs[2]);
3304 }
3305
3306 static void Mod_Q1BSP_FinalizePortals(void)
3307 {
3308         int i, j, numportals, numpoints, portalindex, portalrange = (int)Mem_ExpandableArray_IndexRange(&portalarray);
3309         portal_t *p;
3310         mportal_t *portal;
3311         mvertex_t *point;
3312         mleaf_t *leaf, *endleaf;
3313
3314         // tally up portal and point counts and recalculate bounding boxes for all
3315         // leafs (because qbsp is very sloppy)
3316         leaf = loadmodel->brush.data_leafs;
3317         endleaf = leaf + loadmodel->brush.num_leafs;
3318         if (mod_recalculatenodeboxes.integer)
3319         {
3320                 for (;leaf < endleaf;leaf++)
3321                 {
3322                         VectorSet(leaf->mins,  2000000000,  2000000000,  2000000000);
3323                         VectorSet(leaf->maxs, -2000000000, -2000000000, -2000000000);
3324                 }
3325         }
3326         numportals = 0;
3327         numpoints = 0;
3328         for (portalindex = 0;portalindex < portalrange;portalindex++)
3329         {
3330                 p = (portal_t*)Mem_ExpandableArray_RecordAtIndex(&portalarray, portalindex);
3331                 if (!p)
3332                         continue;
3333                 // note: this check must match the one below or it will usually corrupt memory
3334                 // the nodes[0] != nodes[1] check is because leaf 0 is the shared solid leaf, it can have many portals inside with leaf 0 on both sides
3335                 if (p->numpoints >= 3 && p->nodes[0] != p->nodes[1] && ((mleaf_t *)p->nodes[0])->clusterindex >= 0 && ((mleaf_t *)p->nodes[1])->clusterindex >= 0)
3336                 {
3337                         numportals += 2;
3338                         numpoints += p->numpoints * 2;
3339                 }
3340         }
3341         loadmodel->brush.data_portals = (mportal_t *)Mem_Alloc(loadmodel->mempool, numportals * sizeof(mportal_t) + numpoints * sizeof(mvertex_t));
3342         loadmodel->brush.num_portals = numportals;
3343         loadmodel->brush.data_portalpoints = (mvertex_t *)((unsigned char *) loadmodel->brush.data_portals + numportals * sizeof(mportal_t));
3344         loadmodel->brush.num_portalpoints = numpoints;
3345         // clear all leaf portal chains
3346         for (i = 0;i < loadmodel->brush.num_leafs;i++)
3347                 loadmodel->brush.data_leafs[i].portals = NULL;
3348         // process all portals in the global portal chain, while freeing them
3349         portal = loadmodel->brush.data_portals;
3350         point = loadmodel->brush.data_portalpoints;
3351         for (portalindex = 0;portalindex < portalrange;portalindex++)
3352         {
3353                 p = (portal_t*)Mem_ExpandableArray_RecordAtIndex(&portalarray, portalindex);
3354                 if (!p)
3355                         continue;
3356                 if (p->numpoints >= 3 && p->nodes[0] != p->nodes[1])
3357                 {
3358                         // note: this check must match the one above or it will usually corrupt memory
3359                         // the nodes[0] != nodes[1] check is because leaf 0 is the shared solid leaf, it can have many portals inside with leaf 0 on both sides
3360                         if (((mleaf_t *)p->nodes[0])->clusterindex >= 0 && ((mleaf_t *)p->nodes[1])->clusterindex >= 0)
3361                         {
3362                                 // first make the back to front portal(forward portal)
3363                                 portal->points = point;
3364                                 portal->numpoints = p->numpoints;
3365                                 portal->plane.dist = p->plane.dist;
3366                                 VectorCopy(p->plane.normal, portal->plane.normal);
3367                                 portal->here = (mleaf_t *)p->nodes[1];
3368                                 portal->past = (mleaf_t *)p->nodes[0];
3369                                 // copy points
3370                                 for (j = 0;j < portal->numpoints;j++)
3371                                 {
3372                                         VectorCopy(p->points + j*3, point->position);
3373                                         point++;
3374                                 }
3375                                 BoxFromPoints(portal->mins, portal->maxs, portal->numpoints, portal->points->position);
3376                                 PlaneClassify(&portal->plane);
3377
3378                                 // link into leaf's portal chain
3379                                 portal->next = portal->here->portals;
3380                                 portal->here->portals = portal;
3381
3382                                 // advance to next portal
3383                                 portal++;
3384
3385                                 // then make the front to back portal(backward portal)
3386                                 portal->points = point;
3387                                 portal->numpoints = p->numpoints;
3388                                 portal->plane.dist = -p->plane.dist;
3389                                 VectorNegate(p->plane.normal, portal->plane.normal);
3390                                 portal->here = (mleaf_t *)p->nodes[0];
3391                                 portal->past = (mleaf_t *)p->nodes[1];
3392                                 // copy points
3393                                 for (j = portal->numpoints - 1;j >= 0;j--)
3394                                 {
3395                                         VectorCopy(p->points + j*3, point->position);
3396                                         point++;
3397                                 }
3398                                 BoxFromPoints(portal->mins, portal->maxs, portal->numpoints, portal->points->position);
3399                                 PlaneClassify(&portal->plane);
3400
3401                                 // link into leaf's portal chain
3402                                 portal->next = portal->here->portals;
3403                                 portal->here->portals = portal;
3404
3405                                 // advance to next portal
3406                                 portal++;
3407                         }
3408                         // add the portal's polygon points to the leaf bounding boxes
3409                         if (mod_recalculatenodeboxes.integer)
3410                         {
3411                                 for (i = 0;i < 2;i++)
3412                                 {
3413                                         leaf = (mleaf_t *)p->nodes[i];
3414                                         for (j = 0;j < p->numpoints;j++)
3415                                         {
3416                                                 if (leaf->mins[0] > p->points[j*3+0]) leaf->mins[0] = p->points[j*3+0];
3417                                                 if (leaf->mins[1] > p->points[j*3+1]) leaf->mins[1] = p->points[j*3+1];
3418                                                 if (leaf->mins[2] > p->points[j*3+2]) leaf->mins[2] = p->points[j*3+2];
3419                                                 if (leaf->maxs[0] < p->points[j*3+0]) leaf->maxs[0] = p->points[j*3+0];
3420                                                 if (leaf->maxs[1] < p->points[j*3+1]) leaf->maxs[1] = p->points[j*3+1];
3421                                                 if (leaf->maxs[2] < p->points[j*3+2]) leaf->maxs[2] = p->points[j*3+2];
3422                                         }
3423                                 }
3424                         }
3425                 }
3426         }
3427         // now recalculate the node bounding boxes from the leafs
3428         if (mod_recalculatenodeboxes.integer)
3429                 Mod_Q1BSP_RecursiveRecalcNodeBBox(loadmodel->brush.data_nodes + loadmodel->brushq1.hulls[0].firstclipnode);
3430 }
3431
3432 /*
3433 =============
3434 AddPortalToNodes
3435 =============
3436 */
3437 static void AddPortalToNodes(portal_t *p, mnode_t *front, mnode_t *back)
3438 {
3439         if (!front)
3440                 Host_Error("AddPortalToNodes: NULL front node");
3441         if (!back)
3442                 Host_Error("AddPortalToNodes: NULL back node");
3443         if (p->nodes[0] || p->nodes[1])
3444                 Host_Error("AddPortalToNodes: already included");
3445         // note: front == back is handled gracefully, because leaf 0 is the shared solid leaf, it can often have portals with the same leaf on both sides
3446
3447         p->nodes[0] = front;
3448         p->next[0] = (portal_t *)front->portals;
3449         front->portals = (mportal_t *)p;
3450
3451         p->nodes[1] = back;
3452         p->next[1] = (portal_t *)back->portals;
3453         back->portals = (mportal_t *)p;
3454 }
3455
3456 /*
3457 =============
3458 RemovePortalFromNode
3459 =============
3460 */
3461 static void RemovePortalFromNodes(portal_t *portal)
3462 {
3463         int i;
3464         mnode_t *node;
3465         void **portalpointer;
3466         portal_t *t;
3467         for (i = 0;i < 2;i++)
3468         {
3469                 node = portal->nodes[i];
3470
3471                 portalpointer = (void **) &node->portals;
3472                 while (1)
3473                 {
3474                         t = (portal_t *)*portalpointer;
3475                         if (!t)
3476                                 Host_Error("RemovePortalFromNodes: portal not in leaf");
3477
3478                         if (t == portal)
3479                         {
3480                                 if (portal->nodes[0] == node)
3481                                 {
3482                                         *portalpointer = portal->next[0];
3483                                         portal->nodes[0] = NULL;
3484                                 }
3485                                 else if (portal->nodes[1] == node)
3486                                 {
3487                                         *portalpointer = portal->next[1];
3488                                         portal->nodes[1] = NULL;
3489                                 }
3490                                 else
3491                                         Host_Error("RemovePortalFromNodes: portal not bounding leaf");
3492                                 break;
3493                         }
3494
3495                         if (t->nodes[0] == node)
3496                                 portalpointer = (void **) &t->next[0];
3497                         else if (t->nodes[1] == node)
3498                                 portalpointer = (void **) &t->next[1];
3499                         else
3500                                 Host_Error("RemovePortalFromNodes: portal not bounding leaf");
3501                 }
3502         }
3503 }
3504
3505 #define PORTAL_DIST_EPSILON (1.0 / 32.0)
3506 static double *portalpointsbuffer;
3507 static int portalpointsbufferoffset;
3508 static int portalpointsbuffersize;
3509 static void Mod_Q1BSP_RecursiveNodePortals(mnode_t *node)
3510 {
3511         int i, side;
3512         mnode_t *front, *back, *other_node;
3513         mplane_t clipplane, *plane;
3514         portal_t *portal, *nextportal, *nodeportal, *splitportal, *temp;
3515         int numfrontpoints, numbackpoints;
3516         double *frontpoints, *backpoints;
3517
3518         // if a leaf, we're done
3519         if (!node->plane)
3520                 return;
3521
3522         // get some space for our clipping operations to use
3523         if (portalpointsbuffersize < portalpointsbufferoffset + 6*MAX_PORTALPOINTS)
3524         {
3525                 portalpointsbuffersize = portalpointsbufferoffset * 2;
3526                 portalpointsbuffer = (double *)Mem_Realloc(loadmodel->mempool, portalpointsbuffer, portalpointsbuffersize * sizeof(*portalpointsbuffer));
3527         }
3528         frontpoints = portalpointsbuffer + portalpointsbufferoffset;
3529         portalpointsbufferoffset += 3*MAX_PORTALPOINTS;
3530         backpoints = portalpointsbuffer + portalpointsbufferoffset;
3531         portalpointsbufferoffset += 3*MAX_PORTALPOINTS;
3532
3533         plane = node->plane;
3534
3535         front = node->children[0];
3536         back = node->children[1];
3537         if (front == back)
3538                 Host_Error("Mod_Q1BSP_RecursiveNodePortals: corrupt node hierarchy");
3539
3540         // create the new portal by generating a polygon for the node plane,
3541         // and clipping it by all of the other portals(which came from nodes above this one)
3542         nodeportal = (portal_t *)Mem_ExpandableArray_AllocRecord(&portalarray);
3543         nodeportal->plane = *plane;
3544
3545         // TODO: calculate node bounding boxes during recursion and calculate a maximum plane size accordingly to improve precision (as most maps do not need 1 billion unit plane polygons)
3546         PolygonD_QuadForPlane(nodeportal->points, nodeportal->plane.normal[0], nodeportal->plane.normal[1], nodeportal->plane.normal[2], nodeportal->plane.dist, 1024.0*1024.0*1024.0);
3547         nodeportal->numpoints = 4;
3548         // side = 0;    // shut up compiler warning -> should be no longer needed, Host_Error is declared noreturn now
3549         for (portal = (portal_t *)node->portals;portal;portal = portal->next[side])
3550         {
3551                 clipplane = portal->plane;
3552                 if (portal->nodes[0] == portal->nodes[1])
3553                         Host_Error("Mod_Q1BSP_RecursiveNodePortals: portal has same node on both sides(1)");
3554                 if (portal->nodes[0] == node)
3555                         side = 0;
3556                 else if (portal->nodes[1] == node)
3557                 {
3558                         clipplane.dist = -clipplane.dist;
3559                         VectorNegate(clipplane.normal, clipplane.normal);
3560                         side = 1;
3561                 }
3562                 else
3563                 {
3564                         Host_Error("Mod_Q1BSP_RecursiveNodePortals: mislinked portal");
3565                         side = 0; // hush warning
3566                 }
3567
3568                 for (i = 0;i < nodeportal->numpoints*3;i++)
3569                         frontpoints[i] = nodeportal->points[i];
3570                 PolygonD_Divide(nodeportal->numpoints, frontpoints, clipplane.normal[0], clipplane.normal[1], clipplane.normal[2], clipplane.dist, PORTAL_DIST_EPSILON, MAX_PORTALPOINTS, nodeportal->points, &nodeportal->numpoints, 0, NULL, NULL, NULL);
3571                 if (nodeportal->numpoints <= 0 || nodeportal->numpoints >= MAX_PORTALPOINTS)
3572                         break;
3573         }
3574
3575         if (nodeportal->numpoints < 3)
3576         {
3577                 Con_Print("Mod_Q1BSP_RecursiveNodePortals: WARNING: new portal was clipped away\n");
3578                 nodeportal->numpoints = 0;
3579         }
3580         else if (nodeportal->numpoints >= MAX_PORTALPOINTS)
3581         {
3582                 Con_Print("Mod_Q1BSP_RecursiveNodePortals: WARNING: new portal has too many points\n");
3583                 nodeportal->numpoints = 0;
3584         }
3585
3586         AddPortalToNodes(nodeportal, front, back);
3587
3588         // split the portals of this node along this node's plane and assign them to the children of this node
3589         // (migrating the portals downward through the tree)
3590         for (portal = (portal_t *)node->portals;portal;portal = nextportal)
3591         {
3592                 if (portal->nodes[0] == portal->nodes[1])
3593                         Host_Error("Mod_Q1BSP_RecursiveNodePortals: portal has same node on both sides(2)");
3594                 if (portal->nodes[0] == node)
3595                         side = 0;
3596                 else if (portal->nodes[1] == node)
3597                         side = 1;
3598                 else
3599                 {
3600                         Host_Error("Mod_Q1BSP_RecursiveNodePortals: mislinked portal");
3601                         side = 0; // hush warning
3602                 }
3603                 nextportal = portal->next[side];
3604                 if (!portal->numpoints)
3605                         continue;
3606
3607                 other_node = portal->nodes[!side];
3608                 RemovePortalFromNodes(portal);
3609
3610                 // cut the portal into two portals, one on each side of the node plane
3611                 PolygonD_Divide(portal->numpoints, portal->points, plane->normal[0], plane->normal[1], plane->normal[2], plane->dist, PORTAL_DIST_EPSILON, MAX_PORTALPOINTS, frontpoints, &numfrontpoints, MAX_PORTALPOINTS, backpoints, &numbackpoints, NULL);
3612
3613                 if (!numfrontpoints)
3614                 {
3615                         if (side == 0)
3616                                 AddPortalToNodes(portal, back, other_node);
3617                         else
3618                                 AddPortalToNodes(portal, other_node, back);
3619                         continue;
3620                 }
3621                 if (!numbackpoints)
3622                 {
3623                         if (side == 0)
3624                                 AddPortalToNodes(portal, front, other_node);
3625                         else
3626                                 AddPortalToNodes(portal, other_node, front);
3627                         continue;
3628                 }
3629
3630                 // the portal is split
3631                 splitportal = (portal_t *)Mem_ExpandableArray_AllocRecord(&portalarray);
3632                 temp = splitportal->chain;
3633                 *splitportal = *portal;
3634                 splitportal->chain = temp;
3635                 for (i = 0;i < numbackpoints*3;i++)
3636                         splitportal->points[i] = backpoints[i];
3637                 splitportal->numpoints = numbackpoints;
3638                 for (i = 0;i < numfrontpoints*3;i++)
3639                         portal->points[i] = frontpoints[i];
3640                 portal->numpoints = numfrontpoints;
3641
3642                 if (side == 0)
3643                 {
3644                         AddPortalToNodes(portal, front, other_node);
3645                         AddPortalToNodes(splitportal, back, other_node);
3646                 }
3647                 else
3648                 {
3649                         AddPortalToNodes(portal, other_node, front);
3650                         AddPortalToNodes(splitportal, other_node, back);
3651                 }
3652         }
3653
3654         Mod_Q1BSP_RecursiveNodePortals(front);
3655         Mod_Q1BSP_RecursiveNodePortals(back);
3656
3657         portalpointsbufferoffset -= 6*MAX_PORTALPOINTS;
3658 }
3659
3660 static void Mod_Q1BSP_MakePortals(void)
3661 {
3662         Mem_ExpandableArray_NewArray(&portalarray, loadmodel->mempool, sizeof(portal_t), 1020*1024/sizeof(portal_t));
3663         portalpointsbufferoffset = 0;
3664         portalpointsbuffersize = 6*MAX_PORTALPOINTS*128;
3665         portalpointsbuffer = (double *)Mem_Alloc(loadmodel->mempool, portalpointsbuffersize * sizeof(*portalpointsbuffer));
3666         Mod_Q1BSP_RecursiveNodePortals(loadmodel->brush.data_nodes + loadmodel->brushq1.hulls[0].firstclipnode);
3667         Mem_Free(portalpointsbuffer);
3668         portalpointsbuffer = NULL;
3669         portalpointsbufferoffset = 0;
3670         portalpointsbuffersize = 0;
3671         Mod_Q1BSP_FinalizePortals();
3672         Mem_ExpandableArray_FreeArray(&portalarray);
3673 }
3674
3675 //Returns PVS data for a given point
3676 //(note: can return NULL)
3677 static unsigned char *Mod_Q1BSP_GetPVS(dp_model_t *model, const vec3_t p)
3678 {
3679         mnode_t *node;
3680         node = model->brush.data_nodes + model->brushq1.hulls[0].firstclipnode;
3681         while (node->plane)
3682                 node = node->children[(node->plane->type < 3 ? p[node->plane->type] : DotProduct(p,node->plane->normal)) < node->plane->dist];
3683         if (((mleaf_t *)node)->clusterindex >= 0)
3684                 return model->brush.data_pvsclusters + ((mleaf_t *)node)->clusterindex * model->brush.num_pvsclusterbytes;
3685         else
3686                 return NULL;
3687 }
3688
3689 static void Mod_Q1BSP_FatPVS_RecursiveBSPNode(dp_model_t *model, const vec3_t org, vec_t radius, unsigned char *pvsbuffer, int pvsbytes, mnode_t *node)
3690 {
3691         while (node->plane)
3692         {
3693                 float d = PlaneDiff(org, node->plane);
3694                 if (d > radius)
3695                         node = node->children[0];
3696                 else if (d < -radius)
3697                         node = node->children[1];
3698                 else
3699                 {
3700                         // go down both sides
3701                         Mod_Q1BSP_FatPVS_RecursiveBSPNode(model, org, radius, pvsbuffer, pvsbytes, node->children[0]);
3702                         node = node->children[1];
3703                 }
3704         }
3705         // if this leaf is in a cluster, accumulate the pvs bits
3706         if (((mleaf_t *)node)->clusterindex >= 0)
3707         {
3708                 int i;
3709                 unsigned char *pvs = model->brush.data_pvsclusters + ((mleaf_t *)node)->clusterindex * model->brush.num_pvsclusterbytes;
3710                 for (i = 0;i < pvsbytes;i++)
3711                         pvsbuffer[i] |= pvs[i];
3712         }
3713 }
3714
3715 //Calculates a PVS that is the inclusive or of all leafs within radius pixels
3716 //of the given point.
3717 static int Mod_Q1BSP_FatPVS(dp_model_t *model, const vec3_t org, vec_t radius, unsigned char *pvsbuffer, int pvsbufferlength, qboolean merge)
3718 {
3719         int bytes = model->brush.num_pvsclusterbytes;
3720         bytes = min(bytes, pvsbufferlength);
3721         if (r_novis.integer || r_trippy.integer || !model->brush.num_pvsclusters || !Mod_Q1BSP_GetPVS(model, org))
3722         {
3723                 memset(pvsbuffer, 0xFF, bytes);
3724                 return bytes;
3725         }
3726         if (!merge)
3727                 memset(pvsbuffer, 0, bytes);
3728         Mod_Q1BSP_FatPVS_RecursiveBSPNode(model, org, radius, pvsbuffer, bytes, model->brush.data_nodes + model->brushq1.hulls[0].firstclipnode);
3729         return bytes;
3730 }
3731
3732 static void Mod_Q1BSP_RoundUpToHullSize(dp_model_t *cmodel, const vec3_t inmins, const vec3_t inmaxs, vec3_t outmins, vec3_t outmaxs)
3733 {
3734         vec3_t size;
3735         const hull_t *hull;
3736
3737         VectorSubtract(inmaxs, inmins, size);
3738         if (cmodel->brush.ishlbsp)
3739         {
3740                 if (size[0] < 3)
3741                         hull = &cmodel->brushq1.hulls[0]; // 0x0x0
3742                 else if (size[0] <= 32)
3743                 {
3744                         if (size[2] < 54) // pick the nearest of 36 or 72
3745                                 hull = &cmodel->brushq1.hulls[3]; // 32x32x36
3746                         else
3747                                 hull = &cmodel->brushq1.hulls[1]; // 32x32x72
3748                 }
3749                 else
3750                         hull = &cmodel->brushq1.hulls[2]; // 64x64x64
3751         }
3752         else
3753         {
3754                 if (size[0] < 3)
3755                         hull = &cmodel->brushq1.hulls[0]; // 0x0x0
3756                 else if (size[0] <= 32)
3757                         hull = &cmodel->brushq1.hulls[1]; // 32x32x56
3758                 else
3759                         hull = &cmodel->brushq1.hulls[2]; // 64x64x88
3760         }
3761         VectorCopy(inmins, outmins);
3762         VectorAdd(inmins, hull->clip_size, outmaxs);
3763 }
3764
3765 static int Mod_Q1BSP_CreateShadowMesh(dp_model_t *mod)
3766 {
3767         int j;
3768         int numshadowmeshtriangles = 0;
3769         msurface_t *surface;
3770         if (cls.state == ca_dedicated)
3771                 return 0;
3772         // make a single combined shadow mesh to allow optimized shadow volume creation
3773
3774         for (j = 0, surface = mod->data_surfaces;j < mod->num_surfaces;j++, surface++)
3775         {
3776                 surface->num_firstshadowmeshtriangle = numshadowmeshtriangles;
3777                 numshadowmeshtriangles += surface->num_triangles;
3778         }
3779         mod->brush.shadowmesh = Mod_ShadowMesh_Begin(mod->mempool, numshadowmeshtriangles * 3, numshadowmeshtriangles, NULL, NULL, NULL, false, false, true);
3780         for (j = 0, surface = mod->data_surfaces;j < mod->num_surfaces;j++, surface++)
3781                 if (surface->num_triangles > 0)
3782                         Mod_ShadowMesh_AddMesh(mod->mempool, mod->brush.shadowmesh, NULL, NULL, NULL, mod->surfmesh.data_vertex3f, NULL, NULL, NULL, NULL, surface->num_triangles, (mod->surfmesh.data_element3i + 3 * surface->num_firsttriangle));
3783         mod->brush.shadowmesh = Mod_ShadowMesh_Finish(mod->mempool, mod->brush.shadowmesh, false, r_enableshadowvolumes.integer != 0, false);
3784         if (mod->brush.shadowmesh && mod->brush.shadowmesh->neighbor3i)
3785                 Mod_BuildTriangleNeighbors(mod->brush.shadowmesh->neighbor3i, mod->brush.shadowmesh->element3i, mod->brush.shadowmesh->numtriangles);
3786
3787         return numshadowmeshtriangles;
3788 }
3789
3790 void Mod_CollisionBIH_TraceLineAgainstSurfaces(dp_model_t *model, const frameblend_t *frameblend, const skeleton_t *skeleton, trace_t *trace, const vec3_t start, const vec3_t end, int hitsupercontentsmask);
3791
3792 void Mod_Q1BSP_Load(dp_model_t *mod, void *buffer, void *bufferend)
3793 {
3794         int i, j, k;
3795         sizebuf_t lumpsb[HEADER_LUMPS];
3796         mmodel_t *bm;
3797         float dist, modelyawradius, modelradius;
3798         msurface_t *surface;
3799         hullinfo_t hullinfo;
3800         int totalstylesurfaces, totalstyles, stylecounts[256], remapstyles[256];
3801         model_brush_lightstyleinfo_t styleinfo[256];
3802         unsigned char *datapointer;
3803         sizebuf_t sb;
3804
3805         MSG_InitReadBuffer(&sb, (unsigned char *)buffer, (unsigned char *)bufferend - (unsigned char *)buffer);
3806
3807         mod->type = mod_brushq1;
3808
3809         mod->brush.ishlbsp = false;
3810         mod->brush.isbsp2rmqe = false;
3811         mod->brush.isbsp2 = false;
3812         mod->brush.isq2bsp = false;
3813         mod->brush.isq3bsp = false;
3814         mod->brush.skymasking = true;
3815         i = MSG_ReadLittleLong(&sb);
3816         switch(i)
3817         {
3818         case BSPVERSION:
3819                 mod->modeldatatypestring = "Q1BSP";
3820                 break;
3821         case 30:
3822                 mod->brush.ishlbsp = true;
3823                 mod->modeldatatypestring = "HLBSP";
3824                 break;
3825         case ('2' + 'P' * 256 + 'S' * 65536 + 'B' * 16777216):
3826                 mod->brush.isbsp2 = true;
3827                 mod->brush.isbsp2rmqe = true; // like bsp2 except leaf/node bounds are 16bit (unexpanded)
3828                 mod->modeldatatypestring = "Q1BSP2rmqe";
3829                 break;
3830         case ('B' + 'S' * 256 + 'P' * 65536 + '2' * 16777216):
3831                 mod->brush.isbsp2 = true;
3832                 mod->modeldatatypestring = "Q1BSP2";
3833                 break;
3834         default:
3835                 mod->modeldatatypestring = "Unknown BSP";
3836                 Host_Error("Mod_Q1BSP_Load: %s has wrong version number %i: supported versions are 29 (Quake), 30 (Half-Life), \"BSP2\" or \"2PSB\" (rmqe)", mod->name, i);
3837                 return;
3838         }
3839
3840 // fill in hull info
3841         VectorClear (hullinfo.hullsizes[0][0]);
3842         VectorClear (hullinfo.hullsizes[0][1]);
3843         if (mod->brush.ishlbsp)
3844         {
3845                 hullinfo.filehulls = 4;
3846                 VectorSet (hullinfo.hullsizes[1][0], -16, -16, -36);
3847                 VectorSet (hullinfo.hullsizes[1][1], 16, 16, 36);
3848                 VectorSet (hullinfo.hullsizes[2][0], -32, -32, -32);
3849                 VectorSet (hullinfo.hullsizes[2][1], 32, 32, 32);
3850                 VectorSet (hullinfo.hullsizes[3][0], -16, -16, -18);
3851                 VectorSet (hullinfo.hullsizes[3][1], 16, 16, 18);
3852         }
3853         else
3854         {
3855                 hullinfo.filehulls = 4;
3856                 VectorSet (hullinfo.hullsizes[1][0], -16, -16, -24);
3857                 VectorSet (hullinfo.hullsizes[1][1], 16, 16, 32);
3858                 VectorSet (hullinfo.hullsizes[2][0], -32, -32, -24);
3859                 VectorSet (hullinfo.hullsizes[2][1], 32, 32, 64);
3860         }
3861
3862 // read lumps
3863         for (i = 0; i < HEADER_LUMPS; i++)
3864         {
3865                 int offset = MSG_ReadLittleLong(&sb);
3866                 int size = MSG_ReadLittleLong(&sb);
3867                 if (offset < 0 || offset + size > sb.cursize)
3868                         Host_Error("Mod_Q1BSP_Load: %s has invalid lump %i (offset %i, size %i, file size %i)\n", mod->name, i, offset, size, (int)sb.cursize);
3869                 MSG_InitReadBuffer(&lumpsb[i], sb.data + offset, size);
3870         }
3871
3872         mod->soundfromcenter = true;
3873         mod->TraceBox = Mod_Q1BSP_TraceBox;
3874         mod->TraceLine = Mod_Q1BSP_TraceLine;
3875         mod->TracePoint = Mod_Q1BSP_TracePoint;
3876         mod->PointSuperContents = Mod_Q1BSP_PointSuperContents;
3877         mod->TraceLineAgainstSurfaces = Mod_Q1BSP_TraceLineAgainstSurfaces;
3878         mod->brush.TraceLineOfSight = Mod_Q1BSP_TraceLineOfSight;
3879         mod->brush.SuperContentsFromNativeContents = Mod_Q1BSP_SuperContentsFromNativeContents;
3880         mod->brush.NativeContentsFromSuperContents = Mod_Q1BSP_NativeContentsFromSuperContents;
3881         mod->brush.GetPVS = Mod_Q1BSP_GetPVS;
3882         mod->brush.FatPVS = Mod_Q1BSP_FatPVS;
3883         mod->brush.BoxTouchingPVS = Mod_Q1BSP_BoxTouchingPVS;
3884         mod->brush.BoxTouchingLeafPVS = Mod_Q1BSP_BoxTouchingLeafPVS;
3885         mod->brush.BoxTouchingVisibleLeafs = Mod_Q1BSP_BoxTouchingVisibleLeafs;
3886         mod->brush.FindBoxClusters = Mod_Q1BSP_FindBoxClusters;
3887         mod->brush.LightPoint = Mod_Q1BSP_LightPoint;
3888         mod->brush.FindNonSolidLocation = Mod_Q1BSP_FindNonSolidLocation;
3889         mod->brush.AmbientSoundLevelsForPoint = Mod_Q1BSP_AmbientSoundLevelsForPoint;
3890         mod->brush.RoundUpToHullSize = Mod_Q1BSP_RoundUpToHullSize;
3891         mod->brush.PointInLeaf = Mod_Q1BSP_PointInLeaf;
3892         mod->Draw = R_Q1BSP_Draw;
3893         mod->DrawDepth = R_Q1BSP_DrawDepth;
3894         mod->DrawDebug = R_Q1BSP_DrawDebug;
3895         mod->DrawPrepass = R_Q1BSP_DrawPrepass;
3896         mod->GetLightInfo = R_Q1BSP_GetLightInfo;
3897         mod->CompileShadowMap = R_Q1BSP_CompileShadowMap;
3898         mod->DrawShadowMap = R_Q1BSP_DrawShadowMap;
3899         mod->CompileShadowVolume = R_Q1BSP_CompileShadowVolume;
3900         mod->DrawShadowVolume = R_Q1BSP_DrawShadowVolume;
3901         mod->DrawLight = R_Q1BSP_DrawLight;
3902
3903 // load into heap
3904
3905         mod->brush.qw_md4sum = 0;
3906         mod->brush.qw_md4sum2 = 0;
3907         for (i = 0;i < HEADER_LUMPS;i++)
3908         {
3909                 int temp;
3910                 if (i == LUMP_ENTITIES)
3911                         continue;
3912                 temp = Com_BlockChecksum(lumpsb[i].data, lumpsb[i].cursize);
3913                 mod->brush.qw_md4sum ^= LittleLong(temp);
3914                 if (i == LUMP_VISIBILITY || i == LUMP_LEAFS || i == LUMP_NODES)
3915                         continue;
3916                 mod->brush.qw_md4sum2 ^= LittleLong(temp);
3917         }
3918
3919         Mod_Q1BSP_LoadEntities(&lumpsb[LUMP_ENTITIES]);
3920         Mod_Q1BSP_LoadVertexes(&lumpsb[LUMP_VERTEXES]);
3921         Mod_Q1BSP_LoadEdges(&lumpsb[LUMP_EDGES]);
3922         Mod_Q1BSP_LoadSurfedges(&lumpsb[LUMP_SURFEDGES]);
3923         Mod_Q1BSP_LoadTextures(&lumpsb[LUMP_TEXTURES]);
3924         Mod_Q1BSP_LoadLighting(&lumpsb[LUMP_LIGHTING]);
3925         Mod_Q1BSP_LoadPlanes(&lumpsb[LUMP_PLANES]);
3926         Mod_Q1BSP_LoadTexinfo(&lumpsb[LUMP_TEXINFO]);
3927         Mod_Q1BSP_LoadFaces(&lumpsb[LUMP_FACES]);
3928         Mod_Q1BSP_LoadLeaffaces(&lumpsb[LUMP_MARKSURFACES]);
3929         Mod_Q1BSP_LoadVisibility(&lumpsb[LUMP_VISIBILITY]);
3930         // load submodels before leafs because they contain the number of vis leafs
3931         Mod_Q1BSP_LoadSubmodels(&lumpsb[LUMP_MODELS], &hullinfo);
3932         Mod_Q1BSP_LoadLeafs(&lumpsb[LUMP_LEAFS]);
3933         Mod_Q1BSP_LoadNodes(&lumpsb[LUMP_NODES]);
3934         Mod_Q1BSP_LoadClipnodes(&lumpsb[LUMP_CLIPNODES], &hullinfo);
3935
3936         for (i = 0; i < HEADER_LUMPS; i++)
3937                 if (lumpsb[i].readcount != lumpsb[i].cursize && i != LUMP_TEXTURES && i != LUMP_LIGHTING)
3938                         Host_Error("Lump %i incorrectly loaded (readcount %i, size %i)\n", i, lumpsb[i].readcount, lumpsb[i].cursize);
3939
3940         // check if the map supports transparent water rendering
3941         loadmodel->brush.supportwateralpha = Mod_Q1BSP_CheckWaterAlphaSupport();
3942
3943         // we don't need the compressed pvs data anymore
3944         if (mod->brushq1.data_compressedpvs)
3945                 Mem_Free(mod->brushq1.data_compressedpvs);
3946         mod->brushq1.data_compressedpvs = NULL;
3947         mod->brushq1.num_compressedpvs = 0;
3948
3949         Mod_Q1BSP_MakeHull0();
3950         if (mod_bsp_portalize.integer)
3951                 Mod_Q1BSP_MakePortals();
3952
3953         mod->numframes = 2;             // regular and alternate animation
3954         mod->numskins = 1;
3955
3956         // make a single combined shadow mesh to allow optimized shadow volume creation
3957         Mod_Q1BSP_CreateShadowMesh(loadmodel);
3958
3959         if (loadmodel->brush.numsubmodels)
3960                 loadmodel->brush.submodels = (dp_model_t **)Mem_Alloc(loadmodel->mempool, loadmodel->brush.numsubmodels * sizeof(dp_model_t *));
3961
3962         // LordHavoc: to clear the fog around the original quake submodel code, I
3963         // will explain:
3964         // first of all, some background info on the submodels:
3965         // model 0 is the map model (the world, named maps/e1m1.bsp for example)
3966         // model 1 and higher are submodels (doors and the like, named *1, *2, etc)
3967         // now the weird for loop itself:
3968         // the loop functions in an odd way, on each iteration it sets up the
3969         // current 'mod' model (which despite the confusing code IS the model of
3970         // the number i), at the end of the loop it duplicates the model to become
3971         // the next submodel, and loops back to set up the new submodel.
3972
3973         // LordHavoc: now the explanation of my sane way (which works identically):
3974         // set up the world model, then on each submodel copy from the world model
3975         // and set up the submodel with the respective model info.
3976         totalstylesurfaces = 0;
3977         totalstyles = 0;
3978         for (i = 0;i < mod->brush.numsubmodels;i++)
3979         {
3980                 memset(stylecounts, 0, sizeof(stylecounts));
3981                 for (k = 0;k < mod->brushq1.submodels[i].numfaces;k++)
3982                 {
3983                         surface = mod->data_surfaces + mod->brushq1.submodels[i].firstface + k;
3984                         for (j = 0;j < MAXLIGHTMAPS;j++)
3985                                 stylecounts[surface->lightmapinfo->styles[j]]++;
3986                 }
3987                 for (k = 0;k < 255;k++)
3988                 {
3989                         totalstyles++;
3990                         if (stylecounts[k])
3991                                 totalstylesurfaces += stylecounts[k];
3992                 }
3993         }
3994         datapointer = (unsigned char *)Mem_Alloc(mod->mempool, mod->num_surfaces * sizeof(int) + totalstyles * sizeof(model_brush_lightstyleinfo_t) + totalstylesurfaces * sizeof(int *));
3995         for (i = 0;i < mod->brush.numsubmodels;i++)
3996         {
3997                 // LordHavoc: this code was originally at the end of this loop, but
3998                 // has been transformed to something more readable at the start here.
3999
4000                 if (i > 0)
4001                 {
4002                         char name[10];
4003                         // duplicate the basic information
4004                         dpsnprintf(name, sizeof(name), "*%i", i);
4005                         mod = Mod_FindName(name, loadmodel->name);
4006                         // copy the base model to this one
4007                         *mod = *loadmodel;
4008                         // rename the clone back to its proper name
4009                         strlcpy(mod->name, name, sizeof(mod->name));
4010                         mod->brush.parentmodel = loadmodel;
4011                         // textures and memory belong to the main model
4012                         mod->texturepool = NULL;
4013                         mod->mempool = NULL;
4014                         mod->brush.GetPVS = NULL;
4015                         mod->brush.FatPVS = NULL;
4016                         mod->brush.BoxTouchingPVS = NULL;
4017                         mod->brush.BoxTouchingLeafPVS = NULL;
4018                         mod->brush.BoxTouchingVisibleLeafs = NULL;
4019                         mod->brush.FindBoxClusters = NULL;
4020                         mod->brush.LightPoint = NULL;
4021                         mod->brush.AmbientSoundLevelsForPoint = NULL;
4022                 }
4023
4024                 mod->brush.submodel = i;
4025
4026                 if (loadmodel->brush.submodels)
4027                         loadmodel->brush.submodels[i] = mod;
4028
4029                 bm = &mod->brushq1.submodels[i];
4030
4031                 mod->brushq1.hulls[0].firstclipnode = bm->headnode[0];
4032                 for (j=1 ; j<MAX_MAP_HULLS ; j++)
4033                 {
4034                         mod->brushq1.hulls[j].firstclipnode = bm->headnode[j];
4035                         mod->brushq1.hulls[j].lastclipnode = mod->brushq1.numclipnodes - 1;
4036                 }
4037
4038                 mod->firstmodelsurface = bm->firstface;
4039                 mod->nummodelsurfaces = bm->numfaces;
4040
4041                 // set node/leaf parents for this submodel
4042                 Mod_Q1BSP_LoadNodes_RecursiveSetParent(mod->brush.data_nodes + mod->brushq1.hulls[0].firstclipnode, NULL);
4043
4044                 // make the model surface list (used by shadowing/lighting)
4045                 mod->sortedmodelsurfaces = (int *)datapointer;datapointer += mod->nummodelsurfaces * sizeof(int);
4046                 Mod_MakeSortedSurfaces(mod);
4047
4048                 // copy the submodel bounds, then enlarge the yaw and rotated bounds according to radius
4049                 // (previously this code measured the radius of the vertices of surfaces in the submodel, but that broke submodels that contain only CLIP brushes, which do not produce surfaces)
4050                 VectorCopy(bm->mins, mod->normalmins);
4051                 VectorCopy(bm->maxs, mod->normalmaxs);
4052                 dist = max(fabs(mod->normalmins[0]), fabs(mod->normalmaxs[0]));
4053                 modelyawradius = max(fabs(mod->normalmins[1]), fabs(mod->normalmaxs[1]));
4054                 modelyawradius = dist*dist+modelyawradius*modelyawradius;
4055                 modelradius = max(fabs(mod->normalmins[2]), fabs(mod->normalmaxs[2]));
4056                 modelradius = modelyawradius + modelradius * modelradius;
4057                 modelyawradius = sqrt(modelyawradius);
4058                 modelradius = sqrt(modelradius);
4059                 mod->yawmins[0] = mod->yawmins[1] = -modelyawradius;
4060                 mod->yawmins[2] = mod->normalmins[2];
4061                 mod->yawmaxs[0] = mod->yawmaxs[1] =  modelyawradius;
4062                 mod->yawmaxs[2] = mod->normalmaxs[2];
4063                 mod->rotatedmins[0] = mod->rotatedmins[1] = mod->rotatedmins[2] = -modelradius;
4064                 mod->rotatedmaxs[0] = mod->rotatedmaxs[1] = mod->rotatedmaxs[2] =  modelradius;
4065                 mod->radius = modelradius;
4066                 mod->radius2 = modelradius * modelradius;
4067
4068                 // this gets altered below if sky or water is used
4069                 mod->DrawSky = NULL;
4070                 mod->DrawAddWaterPlanes = NULL;
4071
4072                 // scan surfaces for sky and water and flag the submodel as possessing these features or not
4073                 // build lightstyle lists for quick marking of dirty lightmaps when lightstyles flicker
4074                 if (mod->nummodelsurfaces)
4075                 {
4076                         for (j = 0, surface = &mod->data_surfaces[mod->firstmodelsurface];j < mod->nummodelsurfaces;j++, surface++)
4077                                 if (surface->texture->basematerialflags & MATERIALFLAG_SKY)
4078                                         break;
4079                         if (j < mod->nummodelsurfaces)
4080                                 mod->DrawSky = R_Q1BSP_DrawSky;
4081
4082                         for (j = 0, surface = &mod->data_surfaces[mod->firstmodelsurface];j < mod->nummodelsurfaces;j++, surface++)
4083                                 if (surface->texture->basematerialflags & (MATERIALFLAG_WATERSHADER | MATERIALFLAG_REFRACTION | MATERIALFLAG_REFLECTION | MATERIALFLAG_CAMERA))
4084                                         break;
4085                         if (j < mod->nummodelsurfaces)
4086                                 mod->DrawAddWaterPlanes = R_Q1BSP_DrawAddWaterPlanes;
4087
4088                         // build lightstyle update chains
4089                         // (used to rapidly mark lightmapupdateflags on many surfaces
4090                         // when d_lightstylevalue changes)
4091                         memset(stylecounts, 0, sizeof(stylecounts));
4092                         for (k = 0;k < mod->nummodelsurfaces;k++)
4093                         {
4094                                 surface = mod->data_surfaces + mod->firstmodelsurface + k;
4095                                 for (j = 0;j < MAXLIGHTMAPS;j++)
4096                                         stylecounts[surface->lightmapinfo->styles[j]]++;
4097                         }
4098                         mod->brushq1.num_lightstyles = 0;
4099                         for (k = 0;k < 255;k++)
4100                         {
4101                                 if (stylecounts[k])
4102                                 {
4103                                         styleinfo[mod->brushq1.num_lightstyles].style = k;
4104                                         styleinfo[mod->brushq1.num_lightstyles].value = 0;
4105                                         styleinfo[mod->brushq1.num_lightstyles].numsurfaces = 0;
4106                                         styleinfo[mod->brushq1.num_lightstyles].surfacelist = (int *)datapointer;datapointer += stylecounts[k] * sizeof(int);
4107                                         remapstyles[k] = mod->brushq1.num_lightstyles;
4108                                         mod->brushq1.num_lightstyles++;
4109                                 }
4110                         }
4111                         for (k = 0;k < mod->nummodelsurfaces;k++)
4112                         {
4113                                 surface = mod->data_surfaces + mod->firstmodelsurface + k;
4114                                 for (j = 0;j < MAXLIGHTMAPS;j++)
4115                                 {
4116                                         if (surface->lightmapinfo->styles[j] != 255)
4117                                         {
4118                                                 int r = remapstyles[surface->lightmapinfo->styles[j]];
4119                                                 styleinfo[r].surfacelist[styleinfo[r].numsurfaces++] = mod->firstmodelsurface + k;
4120                                         }
4121                                 }
4122                         }
4123                         mod->brushq1.data_lightstyleinfo = (model_brush_lightstyleinfo_t *)datapointer;datapointer += mod->brushq1.num_lightstyles * sizeof(model_brush_lightstyleinfo_t);
4124                         memcpy(mod->brushq1.data_lightstyleinfo, styleinfo, mod->brushq1.num_lightstyles * sizeof(model_brush_lightstyleinfo_t));
4125                 }
4126                 else
4127                 {
4128                         // LordHavoc: empty submodel(lacrima.bsp has such a glitch)
4129                         Con_Printf("warning: empty submodel *%i in %s\n", i+1, loadmodel->name);
4130                 }
4131                 //mod->brushq1.num_visleafs = bm->visleafs;
4132
4133                 // build a Bounding Interval Hierarchy for culling triangles in light rendering
4134                 Mod_MakeCollisionBIH(mod, true, &mod->render_bih);
4135
4136                 if (mod_q1bsp_polygoncollisions.integer)
4137                 {
4138                         mod->collision_bih = mod->render_bih;
4139                         // point traces and contents checks still use the bsp tree
4140                         mod->TraceLine = Mod_CollisionBIH_TraceLine;
4141                         mod->TraceBox = Mod_CollisionBIH_TraceBox;
4142                         mod->TraceBrush = Mod_CollisionBIH_TraceBrush;
4143                         mod->TraceLineAgainstSurfaces = Mod_CollisionBIH_TraceLineAgainstSurfaces;
4144                 }
4145
4146                 // generate VBOs and other shared data before cloning submodels
4147                 if (i == 0)
4148                 {
4149                         Mod_BuildVBOs();
4150                         Mod_Q1BSP_LoadMapBrushes();
4151                         //Mod_Q1BSP_ProcessLightList();
4152                 }
4153         }
4154
4155         Con_DPrintf("Stats for q1bsp model \"%s\": %i faces, %i nodes, %i leafs, %i visleafs, %i visleafportals, mesh: %i vertices, %i triangles, %i surfaces\n", loadmodel->name, loadmodel->num_surfaces, loadmodel->brush.num_nodes, loadmodel->brush.num_leafs, mod->brush.num_pvsclusters, loadmodel->brush.num_portals, loadmodel->surfmesh.num_vertices, loadmodel->surfmesh.num_triangles, loadmodel->num_surfaces);
4156 }
4157
4158 int Mod_Q2BSP_SuperContentsFromNativeContents(dp_model_t *model, int nativecontents)
4159 {
4160         int supercontents = 0;
4161         if (nativecontents & CONTENTSQ2_SOLID)
4162                 supercontents |= SUPERCONTENTS_SOLID;
4163         if (nativecontents & CONTENTSQ2_WATER)
4164                 supercontents |= SUPERCONTENTS_WATER;
4165         if (nativecontents & CONTENTSQ2_SLIME)
4166                 supercontents |= SUPERCONTENTS_SLIME;
4167         if (nativecontents & CONTENTSQ2_LAVA)
4168                 supercontents |= SUPERCONTENTS_LAVA;
4169         if (nativecontents & CONTENTSQ2_MONSTER)
4170                 supercontents |= SUPERCONTENTS_BODY;
4171         if (nativecontents & CONTENTSQ2_DEADMONSTER)
4172                 supercontents |= SUPERCONTENTS_CORPSE;
4173         if (nativecontents & CONTENTSQ2_PLAYERCLIP)
4174                 supercontents |= SUPERCONTENTS_PLAYERCLIP;
4175         if (nativecontents & CONTENTSQ2_MONSTERCLIP)
4176                 supercontents |= SUPERCONTENTS_MONSTERCLIP;
4177         if (!(nativecontents & CONTENTSQ2_TRANSLUCENT))
4178                 supercontents |= SUPERCONTENTS_OPAQUE;
4179         return supercontents;
4180 }
4181
4182 int Mod_Q2BSP_NativeContentsFromSuperContents(dp_model_t *model, int supercontents)
4183 {
4184         int nativecontents = 0;
4185         if (supercontents & SUPERCONTENTS_SOLID)
4186                 nativecontents |= CONTENTSQ2_SOLID;
4187         if (supercontents & SUPERCONTENTS_WATER)
4188                 nativecontents |= CONTENTSQ2_WATER;
4189         if (supercontents & SUPERCONTENTS_SLIME)
4190                 nativecontents |= CONTENTSQ2_SLIME;
4191         if (supercontents & SUPERCONTENTS_LAVA)
4192                 nativecontents |= CONTENTSQ2_LAVA;
4193         if (supercontents & SUPERCONTENTS_BODY)
4194                 nativecontents |= CONTENTSQ2_MONSTER;
4195         if (supercontents & SUPERCONTENTS_CORPSE)
4196                 nativecontents |= CONTENTSQ2_DEADMONSTER;
4197         if (supercontents & SUPERCONTENTS_PLAYERCLIP)
4198                 nativecontents |= CONTENTSQ2_PLAYERCLIP;
4199         if (supercontents & SUPERCONTENTS_MONSTERCLIP)
4200                 nativecontents |= CONTENTSQ2_MONSTERCLIP;
4201         if (!(supercontents & SUPERCONTENTS_OPAQUE))
4202                 nativecontents |= CONTENTSQ2_TRANSLUCENT;
4203         return nativecontents;
4204 }
4205
4206 static void Mod_Q2BSP_LoadVisibility(sizebuf_t *sb)
4207 {
4208         int i, count;
4209         loadmodel->brushq1.num_compressedpvs = 0;
4210         loadmodel->brushq1.data_compressedpvs = NULL;
4211         loadmodel->brush.num_pvsclusters = 0;
4212         loadmodel->brush.num_pvsclusterbytes = 0;
4213         loadmodel->brush.data_pvsclusters = NULL;
4214
4215         if (!sb->cursize)
4216                 return;
4217
4218         count = MSG_ReadLittleLong(sb);
4219         loadmodel->brush.num_pvsclusters = count;
4220         loadmodel->brush.num_pvsclusterbytes = (count+7)>>3;
4221         loadmodel->brush.data_pvsclusters = (unsigned char *)Mem_Alloc(loadmodel->mempool, count*loadmodel->brush.num_pvsclusterbytes);
4222         for (i = 0;i < count;i++)
4223         {
4224                 int pvsofs = MSG_ReadLittleLong(sb);
4225                 /*int phsofs = */MSG_ReadLittleLong(sb);
4226                 // decompress the vis data for this cluster
4227                 // (note this accesses the underlying data store of sb, which is kind of evil)
4228                 Mod_Q1BSP_DecompressVis(sb->data + pvsofs, sb->data + sb->cursize, loadmodel->brush.data_pvsclusters + i * loadmodel->brush.num_pvsclusterbytes, loadmodel->brush.data_pvsclusters + (i+1) * loadmodel->brush.num_pvsclusterbytes);
4229         }
4230         // hush the loading error check later - we had to do random access on this lump, so we didn't read to the end
4231         sb->readcount = sb->cursize;
4232 }
4233
4234 static void Mod_Q2BSP_LoadNodes(sizebuf_t *sb)
4235 {
4236         int                     i, j, count, p, child[2];
4237         mnode_t         *out;
4238         int structsize = 28;
4239
4240         if (sb->cursize % structsize)
4241                 Host_Error("Mod_Q2BSP_LoadNodes: funny lump size in %s",loadmodel->name);
4242         count = sb->cursize / structsize;
4243         if (count == 0)
4244                 Host_Error("Mod_Q2BSP_LoadNodes: missing BSP tree in %s",loadmodel->name);
4245         out = (mnode_t *)Mem_Alloc(loadmodel->mempool, count*sizeof(*out));
4246
4247         loadmodel->brush.data_nodes = out;
4248         loadmodel->brush.num_nodes = count;
4249
4250         for ( i=0 ; i<count ; i++, out++)
4251         {
4252                 p = MSG_ReadLittleLong(sb);
4253                 out->plane = loadmodel->brush.data_planes + p;
4254                 child[0] = MSG_ReadLittleLong(sb);
4255                 child[1] = MSG_ReadLittleLong(sb);
4256                 out->mins[0] = MSG_ReadLittleShort(sb);
4257                 out->mins[1] = MSG_ReadLittleShort(sb);
4258                 out->mins[2] = MSG_ReadLittleShort(sb);
4259                 out->maxs[0] = MSG_ReadLittleShort(sb);
4260                 out->maxs[1] = MSG_ReadLittleShort(sb);
4261                 out->maxs[2] = MSG_ReadLittleShort(sb);
4262                 out->firstsurface = (unsigned short)MSG_ReadLittleShort(sb);
4263                 out->numsurfaces = (unsigned short)MSG_ReadLittleShort(sb);
4264                 if (out->firstsurface + out->numsurfaces > (unsigned int)loadmodel->num_surfaces)
4265                 {
4266                         Con_Printf("Mod_Q2BSP_LoadNodes: invalid surface index range %i+%i (file has only %i surfaces)\n", out->firstsurface, out->numsurfaces, loadmodel->num_surfaces);
4267                         out->firstsurface = 0;
4268                         out->numsurfaces = 0;
4269                 }
4270                 for (j=0 ; j<2 ; j++)
4271                 {
4272                         p = child[j];
4273                         if (p >= 0)
4274                         {
4275                                 if (p < loadmodel->brush.num_nodes)
4276                                         out->children[j] = loadmodel->brush.data_nodes + p;
4277                                 else
4278                                 {
4279                                         Con_Printf("Mod_Q2BSP_LoadNodes: invalid node index %i (file has only %i nodes)\n", p, loadmodel->brush.num_nodes);
4280                                         // map it to the solid leaf
4281                                         out->children[j] = (mnode_t *)loadmodel->brush.data_leafs;
4282                                 }
4283                         }
4284                         else
4285                         {
4286                                 // get leaf index as a positive value starting at 0 (-1 becomes 0, -2 becomes 1, etc)
4287                                 p = -(p+1);
4288                                 if (p < loadmodel->brush.num_leafs)
4289                                         out->children[j] = (mnode_t *)(loadmodel->brush.data_leafs + p);
4290                                 else
4291                                 {
4292                                         Con_Printf("Mod_Q2BSP_LoadNodes: invalid leaf index %i (file has only %i leafs)\n", p, loadmodel->brush.num_leafs);
4293                                         // map it to the solid leaf
4294                                         out->children[j] = (mnode_t *)loadmodel->brush.data_leafs;
4295                                 }
4296                         }
4297                 }
4298         }
4299
4300         Mod_Q1BSP_LoadNodes_RecursiveSetParent(loadmodel->brush.data_nodes, NULL);      // sets nodes and leafs
4301 }
4302
4303 static void Mod_Q2BSP_LoadTexinfo(sizebuf_t *sb)
4304 {
4305         mtexinfo_t *out;
4306         int i, l, count;
4307         int structsize = 76;
4308         int maxtextures = 1024; // hardcoded limit of quake2 engine, so we may as well use it as an upper bound
4309         char filename[MAX_QPATH];
4310
4311         if (sb->cursize % structsize)
4312                 Host_Error("Mod_Q2BSP_LoadTexinfo: funny lump size in %s",loadmodel->name);
4313         count = sb->cursize / structsize;
4314         out = (mtexinfo_t *)Mem_Alloc(loadmodel->mempool, count * sizeof(*out));
4315         loadmodel->brushq1.texinfo = out;
4316         loadmodel->brushq1.numtexinfo = count;
4317         loadmodel->num_texturesperskin = 0;
4318         loadmodel->data_textures = (texture_t*)Mem_Alloc(loadmodel->mempool, maxtextures * sizeof(texture_t));
4319
4320         for (i = 0;i < count;i++, out++)
4321         {
4322                 int j, k;
4323                 for (k = 0;k < 2;k++)
4324                         for (j = 0;j < 4;j++)
4325                                 out->vecs[k][j] = MSG_ReadLittleFloat(sb);
4326
4327                 out->q2flags = MSG_ReadLittleLong(sb);
4328                 out->q2value = MSG_ReadLittleLong(sb);
4329                 MSG_ReadBytes(sb, 32, (unsigned char*)out->q2texture);
4330                 out->q2texture[31] = 0; // make absolutely sure it is terminated
4331                 out->q2nexttexinfo = MSG_ReadLittleLong(sb);
4332
4333                 // find an existing match for the texture if possible
4334                 dpsnprintf(filename, sizeof(filename), "textures/%s.wal", out->q2texture);
4335                 for (j = 0;j < loadmodel->num_texturesperskin;j++)
4336                         if (!strcmp(filename, loadmodel->data_textures[j].name) && out->q2flags == loadmodel->data_textures[j].q2flags)
4337                                 break;
4338                 // if we don't find the texture, store the new texture
4339                 if (j == loadmodel->num_texturesperskin)
4340                 {
4341                         if (loadmodel->num_texturesperskin < maxtextures)
4342                         {
4343                                 texture_t *tx = loadmodel->data_textures + j;
4344                                 int q2flags = out->q2flags;
4345                                 unsigned char *walfile = NULL;
4346                                 fs_offset_t walfilesize = 0;
4347                                 Mod_LoadTextureFromQ3Shader(tx, filename, true, true, TEXF_MIPMAP | TEXF_ISWORLD | TEXF_PICMIP | TEXF_COMPRESS);
4348                                 // now read the .wal file to get metadata (even if a .tga was overriding it, we still need the wal data)
4349                                 walfile = FS_LoadFile(filename, tempmempool, true, &walfilesize);
4350                                 if (walfile)
4351                                 {
4352                                         int w, h;
4353                                         char q2animname32c[32];
4354                                         LoadWAL_GetMetadata(walfile, (int)walfilesize, &w, &h, &q2flags, &tx->q2value, &tx->q2contents, q2animname32c);
4355                                         tx->width = w;
4356                                         tx->height = h;
4357                                         tx->q2flags = q2flags;
4358                                         Mem_Free(walfile);
4359                                 }
4360                                 // also modify the texture to have the correct contents and such based on flags
4361                                 // note that we create multiple texture_t structures if q2flags differs
4362                                 if (q2flags & Q2SURF_LIGHT)
4363                                 {
4364                                         // doesn't mean anything to us
4365                                 }
4366                                 if (q2flags & Q2SURF_SLICK)
4367                                 {
4368                                         // would be nice to support...
4369                                 }
4370                                 if (q2flags & Q2SURF_SKY)
4371                                 {
4372                                         // sky is a rather specific thing
4373                                         q2flags &= ~Q2SURF_NODRAW; // quake2 had a slightly different meaning than we have in mind here...
4374                                         tx->basematerialflags = MATERIALFLAG_SKY | MATERIALFLAG_NOSHADOW;
4375                                         tx->supercontents = SUPERCONTENTS_SKY | SUPERCONTENTS_NODROP | SUPERCONTENTS_OPAQUE;
4376                                         tx->surfaceflags = Q3SURFACEFLAG_SKY | Q3SURFACEFLAG_NOIMPACT | Q3SURFACEFLAG_NOMARKS | Q3SURFACEFLAG_NODLIGHT | Q3SURFACEFLAG_NOLIGHTMAP;
4377                                 }
4378                                 if (q2flags & Q2SURF_WARP)
4379                                 {
4380                                         // we use a scroll instead of a warp
4381                                         tx->basematerialflags |= MATERIALFLAG_WATERSCROLL | MATERIALFLAG_FULLBRIGHT;
4382                                         // if it's also transparent, we can enable the WATERSHADER
4383                                         // but we do not set the WATERALPHA flag because we don't
4384                                         // want to honor r_wateralpha in q2bsp
4385                                         // (it would go against the artistic intent)
4386                                         if (q2flags & (Q2SURF_TRANS33 | Q2SURF_TRANS66))
4387                                                 tx->basematerialflags |= MATERIALFLAG_WATERSHADER;
4388                                 }
4389                                 if (q2flags & Q2SURF_TRANS33)
4390                                 {
4391                                         tx->basematerialflags |= MATERIALFLAG_ALPHA | MATERIALFLAG_BLENDED;
4392                                         tx->basealpha = 0.3333f;
4393                                         tx->supercontents &= ~SUPERCONTENTS_OPAQUE;
4394                                         if (tx->q2contents & Q2CONTENTS_SOLID)
4395                                                 tx->q2contents = (tx->q2contents & ~Q2CONTENTS_SOLID) | Q2CONTENTS_WINDOW;
4396                                 }
4397                                 if (q2flags & Q2SURF_TRANS66)
4398                                 {
4399                                         tx->basematerialflags |= MATERIALFLAG_ALPHA | MATERIALFLAG_BLENDED;
4400                                         tx->basealpha = 0.6667f;
4401                                         tx->supercontents &= ~SUPERCONTENTS_OPAQUE;
4402                                         if (tx->q2contents & Q2CONTENTS_SOLID)
4403                                                 tx->q2contents = (tx->q2contents & ~Q2CONTENTS_SOLID) | Q2CONTENTS_WINDOW;
4404                                 }
4405                                 if (q2flags & Q2SURF_FLOWING)
4406                                 {
4407                                         tx->tcmods[0].tcmod = Q3TCMOD_SCROLL;
4408                                         tx->tcmods[0].parms[0] = -1.6f;
4409                                         tx->tcmods[0].parms[1] = 0.0f;
4410                                 }
4411                                 if (q2flags & Q2SURF_NODRAW)
4412                                 {
4413                                         tx->basematerialflags = MATERIALFLAG_NODRAW | MATERIALFLAG_NOSHADOW;
4414                                 }
4415                                 if (tx->q2contents & (Q2CONTENTS_TRANSLUCENT | Q2CONTENTS_MONSTERCLIP | Q2CONTENTS_PLAYERCLIP))
4416                                         tx->q2contents |= Q2CONTENTS_DETAIL;
4417                                 if (!(tx->q2contents & (Q2CONTENTS_SOLID | Q2CONTENTS_WINDOW | Q2CONTENTS_AUX | Q2CONTENTS_LAVA | Q2CONTENTS_SLIME | Q2CONTENTS_WATER | Q2CONTENTS_MIST | Q2CONTENTS_PLAYERCLIP | Q2CONTENTS_MONSTERCLIP | Q2CONTENTS_MIST)))
4418                                         tx->q2contents |= Q2CONTENTS_SOLID;
4419                                 if (tx->q2flags & (Q2SURF_HINT | Q2SURF_SKIP))
4420                                         tx->q2contents = 0;
4421                                 tx->supercontents = Mod_Q2BSP_SuperContentsFromNativeContents(loadmodel, tx->q2contents);
4422                                 // set the current values to the base values
4423                                 tx->currentframe = tx;
4424                                 tx->currentskinframe = tx->skinframes[0];
4425                                 tx->currentmaterialflags = tx->basematerialflags;
4426                                 loadmodel->num_texturesperskin++;
4427                                 loadmodel->num_textures = loadmodel->num_texturesperskin;
4428                         }
4429                         else
4430                         {
4431                                 Con_Printf("Mod_Q2BSP_LoadTexinfo: max textures reached (%i)\n", maxtextures);
4432                                 j = 0; // use first texture and give up
4433                         }
4434                 }
4435                 // store the index we found for this texture
4436                 out->textureindex = j;
4437         }
4438
4439         // realloc the textures array now that we know how many we actually need
4440         loadmodel->data_textures = (texture_t*)Mem_Realloc(loadmodel->mempool, loadmodel->data_textures, loadmodel->num_texturesperskin * sizeof(texture_t));
4441
4442         // now assemble the texture chains
4443         // if we encounter the textures out of order, the later ones won't mark the earlier ones in a sequence, so the earlier
4444         for (i = 0, out = loadmodel->brushq1.texinfo;i < count;i++, out++)
4445         {
4446                 int j, k;
4447                 texture_t *t = loadmodel->data_textures + out->textureindex;
4448                 t->currentframe = t; // fix the reallocated pointer
4449
4450                 // if this is not animated, skip it
4451                 // if this is already processed, skip it (part of an existing sequence)
4452                 if (out->q2nexttexinfo == 0 || t->animated)
4453                         continue;
4454
4455                 // store the array of frames to use
4456                 t->animated = 2; // q2bsp animation
4457                 t->anim_total[0] = 0;
4458                 t->anim_total[1] = 0;
4459                 // gather up to 10 frames (we don't support more)
4460                 for (j = i;j >= 0 && t->anim_total[0] < (int)(sizeof(t->anim_frames[0])/sizeof(t->anim_frames[0][0]));j = loadmodel->brushq1.texinfo[j].q2nexttexinfo)
4461                 {
4462                         // detect looping and stop there
4463                         if (t->anim_total[0] && loadmodel->brushq1.texinfo[j].textureindex == out->textureindex)
4464                                 break;
4465                         t->anim_frames[0][t->anim_total[0]++] = &loadmodel->data_textures[loadmodel->brushq1.texinfo[j].textureindex];
4466                 }
4467                 // we could look for the +a sequence here if this is the +0 sequence,
4468                 // but it seems that quake2 did not implement that (even though the
4469                 // files exist in the baseq2 content)
4470
4471                 // write the frame sequence to all the textures involved (just like
4472                 // in the q1bsp loader)
4473                 //
4474                 // note that this can overwrite the rest of the sequence - so if the
4475                 // start of a sequence is found later than the other parts of the
4476                 // sequence, it will go back and rewrite them correctly.
4477                 for (k = 0;k < t->anim_total[0];k++)
4478                 {
4479                         texture_t *txk = t->anim_frames[0][k];
4480                         txk->animated = t->animated;
4481                         txk->anim_total[0] = t->anim_total[0];
4482                         for (l = 0;l < t->anim_total[0];l++)
4483                                 txk->anim_frames[0][l] = t->anim_frames[0][l];
4484                 }
4485         }
4486 }
4487
4488 static void Mod_Q2BSP_LoadLighting(sizebuf_t *sb)
4489 {
4490         // LordHavoc: this fits exactly the same format that we use in .lit files
4491         loadmodel->brushq1.lightdata = (unsigned char *)Mem_Alloc(loadmodel->mempool, sb->cursize);
4492         MSG_ReadBytes(sb, sb->cursize, loadmodel->brushq1.lightdata);
4493 }
4494
4495 static void Mod_Q2BSP_LoadLeafs(sizebuf_t *sb)
4496 {
4497         mleaf_t *out;
4498         int i, j, count, firstmarksurface, nummarksurfaces, firstmarkbrush, nummarkbrushes;
4499         int structsize = 28;
4500
4501         if (sb->cursize % structsize)
4502                 Host_Error("Mod_Q2BSP_LoadLeafs: funny lump size in %s",loadmodel->name);
4503         count = sb->cursize / structsize;
4504         out = (mleaf_t *)Mem_Alloc(loadmodel->mempool, count*sizeof(*out));
4505
4506         loadmodel->brush.data_leafs = out;
4507         loadmodel->brush.num_leafs = count;
4508
4509         // FIXME: this function could really benefit from some error checking
4510         for ( i=0 ; i<count ; i++, out++)
4511         {
4512                 out->contents = MSG_ReadLittleLong(sb);
4513                 out->clusterindex = MSG_ReadLittleShort(sb);
4514                 out->areaindex = MSG_ReadLittleShort(sb);
4515                 out->mins[0] = MSG_ReadLittleShort(sb);
4516                 out->mins[1] = MSG_ReadLittleShort(sb);
4517                 out->mins[2] = MSG_ReadLittleShort(sb);
4518                 out->maxs[0] = MSG_ReadLittleShort(sb);
4519                 out->maxs[1] = MSG_ReadLittleShort(sb);
4520                 out->maxs[2] = MSG_ReadLittleShort(sb);
4521
4522                 firstmarksurface = (unsigned short)MSG_ReadLittleShort(sb);
4523                 nummarksurfaces  = (unsigned short)MSG_ReadLittleShort(sb);
4524                 firstmarkbrush = (unsigned short)MSG_ReadLittleShort(sb);
4525                 nummarkbrushes  = (unsigned short)MSG_ReadLittleShort(sb);
4526
4527                 for (j = 0;j < 4;j++)
4528                         out->ambient_sound_level[j] = 0;
4529
4530                 if (out->clusterindex >= loadmodel->brush.num_pvsclusters)
4531                 {
4532                         Con_Print("Mod_Q2BSP_LoadLeafs: invalid clusterindex\n");
4533                         out->clusterindex = -1;
4534                 }
4535
4536                 if (firstmarksurface >= 0 && firstmarksurface + nummarksurfaces <= loadmodel->brush.num_leafsurfaces)
4537                 {
4538                         out->firstleafsurface = loadmodel->brush.data_leafsurfaces + firstmarksurface;
4539                         out->numleafsurfaces = nummarksurfaces;
4540                 }
4541                 else
4542                 {
4543                         Con_Printf("Mod_Q2BSP_LoadLeafs: invalid leafsurface range %i:%i outside range %i:%i\n", firstmarksurface, firstmarksurface+nummarksurfaces, 0, loadmodel->brush.num_leafsurfaces);
4544                         out->firstleafsurface = NULL;
4545                         out->numleafsurfaces = 0;
4546                 }
4547
4548                 if (firstmarkbrush >= 0 && firstmarkbrush + nummarkbrushes <= loadmodel->brush.num_leafbrushes)
4549                 {
4550                         out->firstleafbrush = loadmodel->brush.data_leafbrushes + firstmarkbrush;
4551                         out->numleafbrushes = nummarkbrushes;
4552                 }
4553                 else
4554                 {
4555                         Con_Printf("Mod_Q2BSP_LoadLeafs: invalid leafbrush range %i:%i outside range %i:%i\n", firstmarkbrush, firstmarkbrush+nummarkbrushes, 0, loadmodel->brush.num_leafbrushes);
4556                         out->firstleafbrush = NULL;
4557                         out->numleafbrushes = 0;
4558                 }
4559         }
4560 }
4561
4562 static void Mod_Q2BSP_LoadLeafBrushes(sizebuf_t *sb)
4563 {
4564         int i, j;
4565         int structsize = 2;
4566
4567         if (sb->cursize % structsize)
4568                 Host_Error("Mod_Q2BSP_LoadLeafBrushes: funny lump size in %s",loadmodel->name);
4569         loadmodel->brush.num_leafbrushes = sb->cursize / structsize;
4570         loadmodel->brush.data_leafbrushes = (int *)Mem_Alloc(loadmodel->mempool, loadmodel->brush.num_leafbrushes * sizeof(int));
4571
4572         for (i = 0;i < loadmodel->brush.num_leafbrushes;i++)
4573         {
4574                 j = (unsigned short) MSG_ReadLittleShort(sb);
4575                 if (j >= loadmodel->brush.num_brushes)
4576                         Host_Error("Mod_Q1BSP_LoadLeafBrushes: bad brush number");
4577                 loadmodel->brush.data_leafbrushes[i] = j;
4578         }
4579 }
4580
4581 static void Mod_Q2BSP_LoadBrushSides(sizebuf_t *sb)
4582 {
4583         q3mbrushside_t *out;
4584         int i, n, count;
4585         int structsize = 4;
4586
4587         if (sb->cursize % structsize)
4588                 Host_Error("Mod_Q2BSP_LoadBrushSides: funny lump size in %s",loadmodel->name);
4589         count = sb->cursize / structsize;
4590         out = (q3mbrushside_t *)Mem_Alloc(loadmodel->mempool, count * sizeof(*out));
4591
4592         loadmodel->brush.data_brushsides = out;
4593         loadmodel->brush.num_brushsides = count;
4594
4595         for (i = 0;i < count;i++, out++)
4596         {
4597                 n = (unsigned short)MSG_ReadLittleShort(sb);
4598                 if (n < 0 || n >= loadmodel->brush.num_planes)
4599                         Host_Error("Mod_Q2BSP_LoadBrushSides: invalid planeindex %i (%i planes)", n, loadmodel->brush.num_planes);
4600                 out->plane = loadmodel->brush.data_planes + n;
4601                 n = MSG_ReadLittleShort(sb);
4602                 if (n >= 0)
4603                 {
4604                         if (n >= loadmodel->brushq1.numtexinfo)
4605                                 Host_Error("Mod_Q2BSP_LoadBrushSides: invalid texinfo index %i (%i texinfos)", n, loadmodel->brushq1.numtexinfo);
4606                         out->texture = loadmodel->data_textures + loadmodel->brushq1.texinfo[n].textureindex;
4607                 }
4608                 else
4609                 {
4610                         //Con_Printf("Mod_Q2BSP_LoadBrushSides: brushside %i has texinfo index %i < 0, changing to generic texture!\n", i, n);
4611                         out->texture = &mod_q1bsp_texture_solid;
4612                 }
4613         }
4614 }
4615
4616 static void Mod_Q2BSP_LoadBrushes(sizebuf_t *sb)
4617 {
4618         q3mbrush_t *out;
4619         int i, j, firstside, numsides, contents, count, maxplanes, q3surfaceflags, supercontents;
4620         colplanef_t *planes;
4621         int structsize = 12;
4622
4623         if (sb->cursize % structsize)
4624                 Host_Error("Mod_Q2BSP_LoadBrushes: funny lump size in %s",loadmodel->name);
4625         count = sb->cursize / structsize;
4626         out = (q3mbrush_t *)Mem_Alloc(loadmodel->mempool, count * sizeof(*out));
4627
4628         loadmodel->brush.data_brushes = out;
4629         loadmodel->brush.num_brushes = count;
4630
4631         maxplanes = 0;
4632         planes = NULL;
4633
4634         for (i = 0;i < count;i++, out++)
4635         {
4636                 firstside = MSG_ReadLittleLong(sb);
4637                 numsides = MSG_ReadLittleLong(sb);
4638                 contents = MSG_ReadLittleLong(sb);
4639                 if (firstside < 0 || firstside + numsides > loadmodel->brush.num_brushsides)
4640                         Host_Error("Mod_Q3BSP_LoadBrushes: invalid brushside range %i : %i (%i brushsides)", firstside, firstside + numsides, loadmodel->brush.num_brushsides);
4641
4642                 out->firstbrushside = loadmodel->brush.data_brushsides + firstside;
4643                 out->numbrushsides = numsides;
4644                 // not really the same...  we should store the q2 contents
4645                 out->texture = out->firstbrushside->texture;
4646                 // convert the contents to our values
4647                 supercontents = Mod_Q2BSP_SuperContentsFromNativeContents(loadmodel, contents);
4648
4649                 // make a list of mplane_t structs to construct a colbrush from
4650                 if (maxplanes < out->numbrushsides)
4651                 {
4652                         maxplanes = out->numbrushsides;
4653                         if (planes)
4654                                 Mem_Free(planes);
4655                         planes = (colplanef_t *)Mem_Alloc(tempmempool, sizeof(colplanef_t) * maxplanes);
4656                 }
4657                 q3surfaceflags = 0;
4658                 for (j = 0;j < out->numbrushsides;j++)
4659                 {
4660                         VectorCopy(out->firstbrushside[j].plane->normal, planes[j].normal);
4661                         planes[j].dist = out->firstbrushside[j].plane->dist;
4662                         planes[j].q3surfaceflags = out->firstbrushside[j].texture->surfaceflags;
4663                         planes[j].texture = out->firstbrushside[j].texture;
4664                         q3surfaceflags |= planes[j].q3surfaceflags;
4665                         // LordHavoc: kind of a mean hack here, but we want the surfaces to have the brush contents
4666                         out->firstbrushside[j].texture->supercontents = supercontents;
4667                 }
4668                 // make the colbrush from the planes
4669                 out->colbrushf = Collision_NewBrushFromPlanes(loadmodel->mempool, out->numbrushsides, planes, out->texture->supercontents, q3surfaceflags, out->texture, true);
4670
4671                 // this whole loop can take a while (e.g. on redstarrepublic4)
4672                 CL_KeepaliveMessage(false);
4673         }
4674         if (planes)
4675                 Mem_Free(planes);
4676 }
4677
4678 static void Mod_Q2BSP_LoadPOP(sizebuf_t *sb)
4679 {
4680         // this is probably a "proof of purchase" lump of some sort, it seems to be 0 size in most bsp files (but not q2dm1.bsp for instance)
4681         sb->readcount = sb->cursize;
4682 }
4683
4684 static void Mod_Q2BSP_LoadAreas(sizebuf_t *sb)
4685 {
4686         // we currently don't use areas, they represent closable doors as vis blockers
4687         sb->readcount = sb->cursize;
4688 }
4689
4690 static void Mod_Q2BSP_LoadAreaPortals(sizebuf_t *sb)
4691 {
4692         // we currently don't use areas, they represent closable doors as vis blockers
4693         sb->readcount = sb->cursize;
4694 }
4695
4696 static void Mod_Q2BSP_LoadSubmodels(sizebuf_t *sb)
4697 {
4698         mmodel_t        *out;
4699         int                     i, count;
4700         int                     structsize = 48;
4701
4702         if (sb->cursize % structsize)
4703                 Host_Error ("Mod_Q2BSP_LoadSubmodels: funny lump size in %s", loadmodel->name);
4704
4705         count = sb->cursize / structsize;
4706         out = (mmodel_t *)Mem_Alloc (loadmodel->mempool, count*sizeof(*out));
4707
4708         loadmodel->brushq1.submodels = out;
4709         loadmodel->brush.numsubmodels = count;
4710
4711         // this is identical to the q1 submodel structure except for having 1 hull
4712         for (i = 0; i < count; i++, out++)
4713         {
4714                 // spread out the mins / maxs by a pixel
4715                 out->mins[0] = MSG_ReadLittleFloat(sb) - 1;
4716                 out->mins[1] = MSG_ReadLittleFloat(sb) - 1;
4717                 out->mins[2] = MSG_ReadLittleFloat(sb) - 1;
4718                 out->maxs[0] = MSG_ReadLittleFloat(sb) + 1;
4719                 out->maxs[1] = MSG_ReadLittleFloat(sb) + 1;
4720                 out->maxs[2] = MSG_ReadLittleFloat(sb) + 1;
4721                 out->origin[0] = MSG_ReadLittleFloat(sb);
4722                 out->origin[1] = MSG_ReadLittleFloat(sb);
4723                 out->origin[2] = MSG_ReadLittleFloat(sb);
4724                 out->headnode[0] = MSG_ReadLittleLong(sb);
4725                 out->firstface = MSG_ReadLittleLong(sb);
4726                 out->numfaces  = MSG_ReadLittleLong(sb);
4727         }
4728 }
4729
4730 static void Mod_Q2BSP_FindSubmodelBrushRange_r(dp_model_t *mod, mnode_t *node, int *first, int *last)
4731 {
4732         int i;
4733         mleaf_t *leaf;
4734         while (node->plane)
4735         {
4736                 Mod_Q2BSP_FindSubmodelBrushRange_r(mod, node->children[0], first, last);
4737                 node = node->children[1];
4738         }
4739         leaf = (mleaf_t*)node;
4740         for (i = 0;i < leaf->numleafbrushes;i++)
4741         {
4742                 int brushnum = leaf->firstleafbrush[i];
4743                 if (*first > brushnum)
4744                         *first = brushnum;
4745                 if (*last < brushnum)
4746                         *last = brushnum;
4747         }
4748 }
4749
4750 static void Mod_Q2BSP_Load(dp_model_t *mod, void *buffer, void *bufferend)
4751 {
4752         int i, j, k;
4753         sizebuf_t lumpsb[Q2HEADER_LUMPS];
4754         mmodel_t *bm;
4755         float dist, modelyawradius, modelradius;
4756         msurface_t *surface;
4757         int totalstylesurfaces, totalstyles, stylecounts[256], remapstyles[256];
4758         model_brush_lightstyleinfo_t styleinfo[256];
4759         unsigned char *datapointer;
4760         sizebuf_t sb;
4761
4762         MSG_InitReadBuffer(&sb, (unsigned char *)buffer, (unsigned char *)bufferend - (unsigned char *)buffer);
4763
4764         mod->type = mod_brushq2;
4765
4766         mod->brush.ishlbsp = false;
4767         mod->brush.isbsp2rmqe = false;
4768         mod->brush.isbsp2 = false;
4769         mod->brush.isq2bsp = true; // q1bsp loaders mostly work but we need a few tweaks
4770         mod->brush.isq3bsp = false;
4771         mod->brush.skymasking = true;
4772         mod->modeldatatypestring = "Q2BSP";
4773
4774         i = MSG_ReadLittleLong(&sb);
4775         if (i != Q2BSPMAGIC)
4776                 Host_Error("Mod_Q2BSP_Load: %s has wrong version number (%i, should be %i)", mod->name, i, Q2BSPVERSION);
4777
4778         i = MSG_ReadLittleLong(&sb);
4779         if (i != Q2BSPVERSION)
4780                 Host_Error("Mod_Q2BSP_Load: %s has wrong version number (%i, should be %i)", mod->name, i, Q2BSPVERSION);
4781
4782 // read lumps
4783         for (i = 0; i < Q2HEADER_LUMPS; i++)
4784         {
4785                 int offset = MSG_ReadLittleLong(&sb);
4786                 int size = MSG_ReadLittleLong(&sb);
4787                 if (offset < 0 || offset + size > sb.cursize)
4788                         Host_Error("Mod_Q2BSP_Load: %s has invalid lump %i (offset %i, size %i, file size %i)\n", mod->name, i, offset, size, (int)sb.cursize);
4789                 MSG_InitReadBuffer(&lumpsb[i], sb.data + offset, size);
4790         }
4791
4792         mod->soundfromcenter = true;
4793         mod->TracePoint = Mod_CollisionBIH_TracePoint;
4794         mod->TraceLine = Mod_CollisionBIH_TraceLine;
4795         mod->TraceBox = Mod_CollisionBIH_TraceBox;
4796         mod->TraceBrush = Mod_CollisionBIH_TraceBrush;
4797         mod->PointSuperContents = Mod_CollisionBIH_PointSuperContents;
4798         mod->TraceLineAgainstSurfaces = Mod_CollisionBIH_TraceLine;
4799         mod->brush.TraceLineOfSight = Mod_Q3BSP_TraceLineOfSight;
4800         mod->brush.SuperContentsFromNativeContents = Mod_Q2BSP_SuperContentsFromNativeContents;
4801         mod->brush.NativeContentsFromSuperContents = Mod_Q2BSP_NativeContentsFromSuperContents;
4802         mod->brush.GetPVS = Mod_Q1BSP_GetPVS;
4803         mod->brush.FatPVS = Mod_Q1BSP_FatPVS;
4804         mod->brush.BoxTouchingPVS = Mod_Q1BSP_BoxTouchingPVS;
4805         mod->brush.BoxTouchingLeafPVS = Mod_Q1BSP_BoxTouchingLeafPVS;
4806         mod->brush.BoxTouchingVisibleLeafs = Mod_Q1BSP_BoxTouchingVisibleLeafs;
4807         mod->brush.FindBoxClusters = Mod_Q1BSP_FindBoxClusters;
4808         mod->brush.LightPoint = Mod_Q1BSP_LightPoint;
4809         mod->brush.FindNonSolidLocation = Mod_Q1BSP_FindNonSolidLocation;
4810         mod->brush.AmbientSoundLevelsForPoint = NULL;
4811         mod->brush.RoundUpToHullSize = NULL;
4812         mod->brush.PointInLeaf = Mod_Q1BSP_PointInLeaf;
4813         mod->Draw = R_Q1BSP_Draw;
4814         mod->DrawDepth = R_Q1BSP_DrawDepth;
4815         mod->DrawDebug = R_Q1BSP_DrawDebug;
4816         mod->DrawPrepass = R_Q1BSP_DrawPrepass;
4817         mod->GetLightInfo = R_Q1BSP_GetLightInfo;
4818         mod->CompileShadowMap = R_Q1BSP_CompileShadowMap;
4819         mod->DrawShadowMap = R_Q1BSP_DrawShadowMap;
4820         mod->CompileShadowVolume = R_Q1BSP_CompileShadowVolume;
4821         mod->DrawShadowVolume = R_Q1BSP_DrawShadowVolume;
4822         mod->DrawLight = R_Q1BSP_DrawLight;
4823
4824 // load into heap
4825
4826         mod->brush.qw_md4sum = 0;
4827         mod->brush.qw_md4sum2 = 0;
4828         for (i = 0;i < Q2HEADER_LUMPS;i++)
4829         {
4830                 int temp;
4831                 if (i == Q2LUMP_ENTITIES)
4832                         continue;
4833                 temp = Com_BlockChecksum(lumpsb[i].data, lumpsb[i].cursize);
4834                 mod->brush.qw_md4sum ^= LittleLong(temp);
4835                 if (i == Q2LUMP_VISIBILITY || i == Q2LUMP_LEAFS || i == Q2LUMP_NODES)
4836                         continue;
4837                 mod->brush.qw_md4sum2 ^= LittleLong(temp);
4838         }
4839
4840         // many of these functions are identical to Q1 loaders, so we use those where possible
4841         Mod_Q1BSP_LoadEntities(&lumpsb[Q2LUMP_ENTITIES]);
4842         Mod_Q1BSP_LoadVertexes(&lumpsb[Q2LUMP_VERTEXES]);
4843         Mod_Q1BSP_LoadEdges(&lumpsb[Q2LUMP_EDGES]);
4844         Mod_Q1BSP_LoadSurfedges(&lumpsb[Q2LUMP_SURFEDGES]);
4845         Mod_Q2BSP_LoadLighting(&lumpsb[Q2LUMP_LIGHTING]);
4846         Mod_Q1BSP_LoadPlanes(&lumpsb[Q2LUMP_PLANES]);
4847         Mod_Q2BSP_LoadTexinfo(&lumpsb[Q2LUMP_TEXINFO]);
4848         Mod_Q2BSP_LoadBrushSides(&lumpsb[Q2LUMP_BRUSHSIDES]);
4849         Mod_Q2BSP_LoadBrushes(&lumpsb[Q2LUMP_BRUSHES]);
4850         Mod_Q1BSP_LoadFaces(&lumpsb[Q2LUMP_FACES]);
4851         Mod_Q1BSP_LoadLeaffaces(&lumpsb[Q2LUMP_LEAFFACES]);
4852         Mod_Q2BSP_LoadLeafBrushes(&lumpsb[Q2LUMP_LEAFBRUSHES]);
4853         Mod_Q2BSP_LoadVisibility(&lumpsb[Q2LUMP_VISIBILITY]);
4854         Mod_Q2BSP_LoadPOP(&lumpsb[Q2LUMP_POP]);
4855         Mod_Q2BSP_LoadAreas(&lumpsb[Q2LUMP_AREAS]);
4856         Mod_Q2BSP_LoadAreaPortals(&lumpsb[Q2LUMP_AREAPORTALS]);
4857         Mod_Q2BSP_LoadLeafs(&lumpsb[Q2LUMP_LEAFS]);
4858         Mod_Q2BSP_LoadNodes(&lumpsb[Q2LUMP_NODES]);
4859         Mod_Q2BSP_LoadSubmodels(&lumpsb[Q2LUMP_MODELS]);
4860
4861         for (i = 0; i < Q2HEADER_LUMPS; i++)
4862                 if (lumpsb[i].readcount != lumpsb[i].cursize)
4863                         Host_Error("Lump %i incorrectly loaded (readcount %i, size %i)\n", i, lumpsb[i].readcount, lumpsb[i].cursize);
4864
4865         // we don't actually set MATERIALFLAG_WATERALPHA on anything, so this
4866         // doesn't enable the cvar, just indicates that transparent water is OK
4867         loadmodel->brush.supportwateralpha = true;
4868
4869         // we don't need the compressed pvs data anymore
4870         if (mod->brushq1.data_compressedpvs)
4871                 Mem_Free(mod->brushq1.data_compressedpvs);
4872         mod->brushq1.data_compressedpvs = NULL;
4873         mod->brushq1.num_compressedpvs = 0;
4874
4875         // the MakePortals code works fine on the q2bsp data as well
4876         if (mod_bsp_portalize.integer)
4877                 Mod_Q1BSP_MakePortals();
4878
4879         mod->numframes = 0;             // q2bsp animations are kind of special, frame is unbounded...
4880         mod->numskins = 1;
4881
4882         // make a single combined shadow mesh to allow optimized shadow volume creation
4883         Mod_Q1BSP_CreateShadowMesh(loadmodel);
4884
4885         if (loadmodel->brush.numsubmodels)
4886                 loadmodel->brush.submodels = (dp_model_t **)Mem_Alloc(loadmodel->mempool, loadmodel->brush.numsubmodels * sizeof(dp_model_t *));
4887
4888         totalstylesurfaces = 0;
4889         totalstyles = 0;
4890         for (i = 0;i < mod->brush.numsubmodels;i++)
4891         {
4892                 memset(stylecounts, 0, sizeof(stylecounts));
4893                 for (k = 0;k < mod->brushq1.submodels[i].numfaces;k++)
4894                 {
4895                         surface = mod->data_surfaces + mod->brushq1.submodels[i].firstface + k;
4896                         for (j = 0;j < MAXLIGHTMAPS;j++)
4897                                 stylecounts[surface->lightmapinfo->styles[j]]++;
4898                 }
4899                 for (k = 0;k < 255;k++)
4900                 {
4901                         totalstyles++;
4902                         if (stylecounts[k])
4903                                 totalstylesurfaces += stylecounts[k];
4904                 }
4905         }
4906         datapointer = (unsigned char *)Mem_Alloc(mod->mempool, mod->num_surfaces * sizeof(int) + totalstyles * sizeof(model_brush_lightstyleinfo_t) + totalstylesurfaces * sizeof(int *));
4907         // set up the world model, then on each submodel copy from the world model
4908         // and set up the submodel with the respective model info.
4909         mod = loadmodel;
4910         for (i = 0;i < loadmodel->brush.numsubmodels;i++)
4911         {
4912                 mnode_t *rootnode = NULL;
4913                 int firstbrush = loadmodel->brush.num_brushes, lastbrush = 0;
4914                 if (i > 0)
4915                 {
4916                         char name[10];
4917                         // duplicate the basic information
4918                         dpsnprintf(name, sizeof(name), "*%i", i);
4919                         mod = Mod_FindName(name, loadmodel->name);
4920                         // copy the base model to this one
4921                         *mod = *loadmodel;
4922                         // rename the clone back to its proper name
4923                         strlcpy(mod->name, name, sizeof(mod->name));
4924                         mod->brush.parentmodel = loadmodel;
4925                         // textures and memory belong to the main model
4926                         mod->texturepool = NULL;
4927                         mod->mempool = NULL;
4928                         mod->brush.GetPVS = NULL;
4929                         mod->brush.FatPVS = NULL;
4930                         mod->brush.BoxTouchingPVS = NULL;
4931                         mod->brush.BoxTouchingLeafPVS = NULL;
4932                         mod->brush.BoxTouchingVisibleLeafs = NULL;
4933                         mod->brush.FindBoxClusters = NULL;
4934                         mod->brush.LightPoint = NULL;
4935                         mod->brush.AmbientSoundLevelsForPoint = NULL;
4936                 }
4937                 mod->brush.submodel = i;
4938                 if (loadmodel->brush.submodels)
4939                         loadmodel->brush.submodels[i] = mod;
4940
4941                 bm = &mod->brushq1.submodels[i];
4942
4943                 // we store the headnode (there's only one in Q2BSP) as if it were the first hull
4944                 mod->brushq1.hulls[0].firstclipnode = bm->headnode[0];
4945
4946                 mod->firstmodelsurface = bm->firstface;
4947                 mod->nummodelsurfaces = bm->numfaces;
4948
4949                 // set node/leaf parents for this submodel
4950                 // note: if the root of this submodel is a leaf (headnode[0] < 0) then there is nothing to do...
4951                 // (this happens in base3.bsp)
4952                 if (bm->headnode[0] >= 0)
4953                         rootnode = mod->brush.data_nodes + bm->headnode[0];
4954                 else
4955                         rootnode = (mnode_t*)(mod->brush.data_leafs + -1 - bm->headnode[0]);
4956                 Mod_Q1BSP_LoadNodes_RecursiveSetParent(rootnode, NULL);
4957
4958                 // make the model surface list (used by shadowing/lighting)
4959                 mod->sortedmodelsurfaces = (int *)datapointer;datapointer += mod->nummodelsurfaces * sizeof(int);
4960                 Mod_Q2BSP_FindSubmodelBrushRange_r(mod, rootnode, &firstbrush, &lastbrush);
4961                 if (firstbrush <= lastbrush)
4962                 {
4963                         mod->firstmodelbrush = firstbrush;
4964                         mod->nummodelbrushes = lastbrush + 1 - firstbrush;
4965                 }
4966                 else
4967                 {
4968                         mod->firstmodelbrush = 0;
4969                         mod->nummodelbrushes = 0;
4970                 }
4971                 Mod_MakeSortedSurfaces(mod);
4972
4973                 VectorCopy(bm->mins, mod->normalmins);
4974                 VectorCopy(bm->maxs, mod->normalmaxs);
4975                 dist = max(fabs(mod->normalmins[0]), fabs(mod->normalmaxs[0]));
4976                 modelyawradius = max(fabs(mod->normalmins[1]), fabs(mod->normalmaxs[1]));
4977                 modelyawradius = dist*dist+modelyawradius*modelyawradius;
4978                 modelradius = max(fabs(mod->normalmins[2]), fabs(mod->normalmaxs[2]));
4979                 modelradius = modelyawradius + modelradius * modelradius;
4980                 modelyawradius = sqrt(modelyawradius);
4981                 modelradius = sqrt(modelradius);
4982                 mod->yawmins[0] = mod->yawmins[1] = -modelyawradius;
4983                 mod->yawmins[2] = mod->normalmins[2];
4984                 mod->yawmaxs[0] = mod->yawmaxs[1] =  modelyawradius;
4985                 mod->yawmaxs[2] = mod->normalmaxs[2];
4986                 mod->rotatedmins[0] = mod->rotatedmins[1] = mod->rotatedmins[2] = -modelradius;
4987                 mod->rotatedmaxs[0] = mod->rotatedmaxs[1] = mod->rotatedmaxs[2] =  modelradius;
4988                 mod->radius = modelradius;
4989                 mod->radius2 = modelradius * modelradius;
4990
4991                 // this gets altered below if sky or water is used
4992                 mod->DrawSky = NULL;
4993                 mod->DrawAddWaterPlanes = NULL;
4994
4995                 // scan surfaces for sky and water and flag the submodel as possessing these features or not
4996                 // build lightstyle lists for quick marking of dirty lightmaps when lightstyles flicker
4997                 if (mod->nummodelsurfaces)
4998                 {
4999                         for (j = 0, surface = &mod->data_surfaces[mod->firstmodelsurface];j < mod->nummodelsurfaces;j++, surface++)
5000                                 if (surface->texture->basematerialflags & MATERIALFLAG_SKY)
5001                                         break;
5002                         if (j < mod->nummodelsurfaces)
5003                                 mod->DrawSky = R_Q1BSP_DrawSky;
5004
5005                         for (j = 0, surface = &mod->data_surfaces[mod->firstmodelsurface];j < mod->nummodelsurfaces;j++, surface++)
5006                                 if (surface->texture->basematerialflags & (MATERIALFLAG_WATERSHADER | MATERIALFLAG_REFRACTION | MATERIALFLAG_REFLECTION | MATERIALFLAG_CAMERA))
5007                                         break;
5008                         if (j < mod->nummodelsurfaces)
5009                                 mod->DrawAddWaterPlanes = R_Q1BSP_DrawAddWaterPlanes;
5010
5011                         // build lightstyle update chains
5012                         // (used to rapidly mark lightmapupdateflags on many surfaces
5013                         // when d_lightstylevalue changes)
5014                         memset(stylecounts, 0, sizeof(stylecounts));
5015                         for (k = 0;k < mod->nummodelsurfaces;k++)
5016                         {
5017                                 surface = mod->data_surfaces + mod->firstmodelsurface + k;
5018                                 for (j = 0;j < MAXLIGHTMAPS;j++)
5019                                         stylecounts[surface->lightmapinfo->styles[j]]++;
5020                         }
5021                         mod->brushq1.num_lightstyles = 0;
5022                         for (k = 0;k < 255;k++)
5023                         {
5024                                 if (stylecounts[k])
5025                                 {
5026                                         styleinfo[mod->brushq1.num_lightstyles].style = k;
5027                                         styleinfo[mod->brushq1.num_lightstyles].value = 0;
5028                                         styleinfo[mod->brushq1.num_lightstyles].numsurfaces = 0;
5029                                         styleinfo[mod->brushq1.num_lightstyles].surfacelist = (int *)datapointer;datapointer += stylecounts[k] * sizeof(int);
5030                                         remapstyles[k] = mod->brushq1.num_lightstyles;
5031                                         mod->brushq1.num_lightstyles++;
5032                                 }
5033                         }
5034                         for (k = 0;k < mod->nummodelsurfaces;k++)
5035                         {
5036                                 surface = mod->data_surfaces + mod->firstmodelsurface + k;
5037                                 for (j = 0;j < MAXLIGHTMAPS;j++)
5038                                 {
5039                                         if (surface->lightmapinfo->styles[j] != 255)
5040                                         {
5041                                                 int r = remapstyles[surface->lightmapinfo->styles[j]];
5042                                                 styleinfo[r].surfacelist[styleinfo[r].numsurfaces++] = mod->firstmodelsurface + k;
5043                                         }
5044                                 }
5045                         }
5046                         mod->brushq1.data_lightstyleinfo = (model_brush_lightstyleinfo_t *)datapointer;datapointer += mod->brushq1.num_lightstyles * sizeof(model_brush_lightstyleinfo_t);
5047                         memcpy(mod->brushq1.data_lightstyleinfo, styleinfo, mod->brushq1.num_lightstyles * sizeof(model_brush_lightstyleinfo_t));
5048                 }
5049                 else
5050                 {
5051                         Con_Printf("warning: empty submodel *%i in %s\n", i+1, loadmodel->name);
5052                 }
5053                 //mod->brushq1.num_visleafs = bm->visleafs;
5054
5055                 // build a Bounding Interval Hierarchy for culling triangles in light rendering
5056                 Mod_MakeCollisionBIH(mod, false, &mod->collision_bih);
5057
5058                 // build a Bounding Interval Hierarchy for culling brushes in collision detection
5059                 Mod_MakeCollisionBIH(mod, true, &mod->render_bih);
5060
5061                 // generate VBOs and other shared data before cloning submodels
5062                 if (i == 0)
5063                         Mod_BuildVBOs();
5064         }
5065         mod = loadmodel;
5066
5067         Con_DPrintf("Stats for q2bsp model \"%s\": %i faces, %i nodes, %i leafs, %i clusters, %i clusterportals, mesh: %i vertices, %i triangles, %i surfaces\n", loadmodel->name, loadmodel->num_surfaces, loadmodel->brush.num_nodes, loadmodel->brush.num_leafs, mod->brush.num_pvsclusters, loadmodel->brush.num_portals, loadmodel->surfmesh.num_vertices, loadmodel->surfmesh.num_triangles, loadmodel->num_surfaces);
5068 }
5069
5070 static int Mod_Q3BSP_SuperContentsFromNativeContents(dp_model_t *model, int nativecontents);
5071 static int Mod_Q3BSP_NativeContentsFromSuperContents(dp_model_t *model, int supercontents);
5072
5073 static void Mod_Q3BSP_LoadEntities(lump_t *l)
5074 {
5075         const char *data;
5076         char key[128], value[MAX_INPUTLINE];
5077         float v[3];
5078         loadmodel->brushq3.num_lightgrid_cellsize[0] = 64;
5079         loadmodel->brushq3.num_lightgrid_cellsize[1] = 64;
5080         loadmodel->brushq3.num_lightgrid_cellsize[2] = 128;
5081         if (!l->filelen)
5082                 return;
5083         loadmodel->brush.entities = (char *)Mem_Alloc(loadmodel->mempool, l->filelen + 1);
5084         memcpy(loadmodel->brush.entities, mod_base + l->fileofs, l->filelen);
5085         loadmodel->brush.entities[l->filelen] = 0;
5086         data = loadmodel->brush.entities;
5087         // some Q3 maps override the lightgrid_cellsize with a worldspawn key
5088         // VorteX: q3map2 FS-R generates tangentspace deluxemaps for q3bsp and sets 'deluxeMaps' key
5089         loadmodel->brushq3.deluxemapping = false;
5090         if (data && COM_ParseToken_Simple(&data, false, false, true) && com_token[0] == '{')
5091         {
5092                 while (1)
5093                 {
5094                         if (!COM_ParseToken_Simple(&data, false, false, true))
5095                                 break; // error
5096                         if (com_token[0] == '}')
5097                                 break; // end of worldspawn
5098                         if (com_token[0] == '_')
5099                                 strlcpy(key, com_token + 1, sizeof(key));
5100                         else
5101                                 strlcpy(key, com_token, sizeof(key));
5102                         while (key[strlen(key)-1] == ' ') // remove trailing spaces
5103                                 key[strlen(key)-1] = 0;
5104                         if (!COM_ParseToken_Simple(&data, false, false, true))
5105                                 break; // error
5106                         strlcpy(value, com_token, sizeof(value));
5107                         if (!strcasecmp("gridsize", key)) // this one is case insensitive to 100% match q3map2
5108                         {
5109 #if _MSC_VER >= 1400
5110 #define sscanf sscanf_s
5111 #endif
5112 #if 0
5113                                 if (sscanf(value, "%f %f %f", &v[0], &v[1], &v[2]) == 3 && v[0] != 0 && v[1] != 0 && v[2] != 0)
5114                                         VectorCopy(v, loadmodel->brushq3.num_lightgrid_cellsize);
5115 #else
5116                                 VectorSet(v, 64, 64, 128);
5117                                 if(sscanf(value, "%f %f %f", &v[0], &v[1], &v[2]) != 3)
5118                                         Con_Printf("Mod_Q3BSP_LoadEntities: funny gridsize \"%s\" in %s, interpreting as \"%f %f %f\" to match q3map2's parsing\n", value, loadmodel->name, v[0], v[1], v[2]);
5119                                 if (v[0] != 0 && v[1] != 0 && v[2] != 0)
5120                                         VectorCopy(v, loadmodel->brushq3.num_lightgrid_cellsize);
5121 #endif
5122                         }
5123                         else if (!strcmp("deluxeMaps", key))
5124                         {
5125                                 if (!strcmp(com_token, "1"))
5126                                 {
5127                                         loadmodel->brushq3.deluxemapping = true;
5128                                         loadmodel->brushq3.deluxemapping_modelspace = true;
5129                                 }
5130                                 else if (!strcmp(com_token, "2"))
5131                                 {
5132                                         loadmodel->brushq3.deluxemapping = true;
5133                                         loadmodel->brushq3.deluxemapping_modelspace = false;
5134                                 }
5135                         }
5136                 }
5137         }
5138 }
5139
5140 static void Mod_Q3BSP_LoadTextures(lump_t *l)
5141 {
5142         q3dtexture_t *in;
5143         texture_t *out;
5144         int i, count;
5145
5146         in = (q3dtexture_t *)(mod_base + l->fileofs);
5147         if (l->filelen % sizeof(*in))
5148                 Host_Error("Mod_Q3BSP_LoadTextures: funny lump size in %s",loadmodel->name);
5149         count = l->filelen / sizeof(*in);
5150         out = (texture_t *)Mem_Alloc(loadmodel->mempool, count * sizeof(*out));
5151
5152         loadmodel->data_textures = out;
5153         loadmodel->num_textures = count;
5154         loadmodel->num_texturesperskin = loadmodel->num_textures;
5155
5156         for (i = 0;i < count;i++)
5157         {
5158                 out[i].surfaceflags = LittleLong(in[i].surfaceflags);
5159                 out[i].supercontents = Mod_Q3BSP_SuperContentsFromNativeContents(loadmodel, LittleLong(in[i].contents));
5160                 Mod_LoadTextureFromQ3Shader(out + i, in[i].name, true, true, TEXF_MIPMAP | TEXF_ISWORLD | TEXF_PICMIP | TEXF_COMPRESS);
5161                 // restore the surfaceflags and supercontents
5162                 out[i].surfaceflags = LittleLong(in[i].surfaceflags);
5163                 out[i].supercontents = Mod_Q3BSP_SuperContentsFromNativeContents(loadmodel, LittleLong(in[i].contents));
5164         }
5165 }
5166
5167 static void Mod_Q3BSP_LoadPlanes(lump_t *l)
5168 {
5169         q3dplane_t *in;
5170         mplane_t *out;
5171         int i, count;
5172
5173         in = (q3dplane_t *)(mod_base + l->fileofs);
5174         if (l->filelen % sizeof(*in))
5175                 Host_Error("Mod_Q3BSP_LoadPlanes: funny lump size in %s",loadmodel->name);
5176         count = l->filelen / sizeof(*in);
5177         out = (mplane_t *)Mem_Alloc(loadmodel->mempool, count * sizeof(*out));
5178
5179         loadmodel->brush.data_planes = out;
5180         loadmodel->brush.num_planes = count;
5181
5182         for (i = 0;i < count;i++, in++, out++)
5183         {
5184                 out->normal[0] = LittleFloat(in->normal[0]);
5185                 out->normal[1] = LittleFloat(in->normal[1]);
5186                 out->normal[2] = LittleFloat(in->normal[2]);
5187                 out->dist = LittleFloat(in->dist);
5188                 PlaneClassify(out);
5189         }
5190 }
5191
5192 static void Mod_Q3BSP_LoadBrushSides(lump_t *l)
5193 {
5194         q3dbrushside_t *in;
5195         q3mbrushside_t *out;
5196         int i, n, count;
5197
5198         in = (q3dbrushside_t *)(mod_base + l->fileofs);
5199         if (l->filelen % sizeof(*in))
5200                 Host_Error("Mod_Q3BSP_LoadBrushSides: funny lump size in %s",loadmodel->name);
5201         count = l->filelen / sizeof(*in);
5202         out = (q3mbrushside_t *)Mem_Alloc(loadmodel->mempool, count * sizeof(*out));
5203
5204         loadmodel->brush.data_brushsides = out;
5205         loadmodel->brush.num_brushsides = count;
5206
5207         for (i = 0;i < count;i++, in++, out++)
5208         {
5209                 n = LittleLong(in->planeindex);
5210                 if (n < 0 || n >= loadmodel->brush.num_planes)
5211                         Host_Error("Mod_Q3BSP_LoadBrushSides: invalid planeindex %i (%i planes)", n, loadmodel->brush.num_planes);
5212                 out->plane = loadmodel->brush.data_planes + n;
5213                 n = LittleLong(in->textureindex);
5214                 if (n < 0 || n >= loadmodel->num_textures)
5215                         Host_Error("Mod_Q3BSP_LoadBrushSides: invalid textureindex %i (%i textures)", n, loadmodel->num_textures);
5216                 out->texture = loadmodel->data_textures + n;
5217         }
5218 }
5219
5220 static void Mod_Q3BSP_LoadBrushSides_IG(lump_t *l)
5221 {
5222         q3dbrushside_ig_t *in;
5223         q3mbrushside_t *out;
5224         int i, n, count;
5225
5226         in = (q3dbrushside_ig_t *)(mod_base + l->fileofs);
5227         if (l->filelen % sizeof(*in))
5228                 Host_Error("Mod_Q3BSP_LoadBrushSides: funny lump size in %s",loadmodel->name);
5229         count = l->filelen / sizeof(*in);
5230         out = (q3mbrushside_t *)Mem_Alloc(loadmodel->mempool, count * sizeof(*out));
5231
5232         loadmodel->brush.data_brushsides = out;
5233         loadmodel->brush.num_brushsides = count;
5234
5235         for (i = 0;i < count;i++, in++, out++)
5236         {
5237                 n = LittleLong(in->planeindex);
5238                 if (n < 0 || n >= loadmodel->brush.num_planes)
5239                         Host_Error("Mod_Q3BSP_LoadBrushSides: invalid planeindex %i (%i planes)", n, loadmodel->brush.num_planes);
5240                 out->plane = loadmodel->brush.data_planes + n;
5241                 n = LittleLong(in->textureindex);
5242                 if (n < 0 || n >= loadmodel->num_textures)
5243                         Host_Error("Mod_Q3BSP_LoadBrushSides: invalid textureindex %i (%i textures)", n, loadmodel->num_textures);
5244                 out->texture = loadmodel->data_textures + n;
5245         }
5246 }
5247
5248 static void Mod_Q3BSP_LoadBrushes(lump_t *l)
5249 {
5250         q3dbrush_t *in;
5251         q3mbrush_t *out;
5252         int i, j, n, c, count, maxplanes, q3surfaceflags;
5253         colplanef_t *planes;
5254
5255         in = (q3dbrush_t *)(mod_base + l->fileofs);
5256         if (l->filelen % sizeof(*in))
5257                 Host_Error("Mod_Q3BSP_LoadBrushes: funny lump size in %s",loadmodel->name);
5258         count = l->filelen / sizeof(*in);
5259         out = (q3mbrush_t *)Mem_Alloc(loadmodel->mempool, count * sizeof(*out));
5260
5261         loadmodel->brush.data_brushes = out;
5262         loadmodel->brush.num_brushes = count;
5263
5264         maxplanes = 0;
5265         planes = NULL;
5266
5267         for (i = 0;i < count;i++, in++, out++)
5268         {
5269                 n = LittleLong(in->firstbrushside);
5270                 c = LittleLong(in->numbrushsides);
5271                 if (n < 0 || n + c > loadmodel->brush.num_brushsides)
5272                         Host_Error("Mod_Q3BSP_LoadBrushes: invalid brushside range %i : %i (%i brushsides)", n, n + c, loadmodel->brush.num_brushsides);
5273                 out->firstbrushside = loadmodel->brush.data_brushsides + n;
5274                 out->numbrushsides = c;
5275                 n = LittleLong(in->textureindex);
5276                 if (n < 0 || n >= loadmodel->num_textures)
5277                         Host_Error("Mod_Q3BSP_LoadBrushes: invalid textureindex %i (%i textures)", n, loadmodel->num_textures);
5278                 out->texture = loadmodel->data_textures + n;
5279
5280                 // make a list of mplane_t structs to construct a colbrush from
5281                 if (maxplanes < out->numbrushsides)
5282                 {
5283                         maxplanes = out->numbrushsides;
5284                         if (planes)
5285                                 Mem_Free(planes);
5286                         planes = (colplanef_t *)Mem_Alloc(tempmempool, sizeof(colplanef_t) * maxplanes);
5287                 }
5288                 q3surfaceflags = 0;
5289                 for (j = 0;j < out->numbrushsides;j++)
5290                 {
5291                         VectorCopy(out->firstbrushside[j].plane->normal, planes[j].normal);
5292                         planes[j].dist = out->firstbrushside[j].plane->dist;
5293                         planes[j].q3surfaceflags = out->firstbrushside[j].texture->surfaceflags;
5294                         planes[j].texture = out->firstbrushside[j].texture;
5295                         q3surfaceflags |= planes[j].q3surfaceflags;
5296                 }
5297                 // make the colbrush from the planes
5298                 out->colbrushf = Collision_NewBrushFromPlanes(loadmodel->mempool, out->numbrushsides, planes, out->texture->supercontents, q3surfaceflags, out->texture, true);
5299
5300                 // this whole loop can take a while (e.g. on redstarrepublic4)
5301                 CL_KeepaliveMessage(false);
5302         }
5303         if (planes)
5304                 Mem_Free(planes);
5305 }
5306
5307 static void Mod_Q3BSP_LoadEffects(lump_t *l)
5308 {
5309         q3deffect_t *in;
5310         q3deffect_t *out;
5311         int i, n, count;
5312
5313         in = (q3deffect_t *)(mod_base + l->fileofs);
5314         if (l->filelen % sizeof(*in))
5315                 Host_Error("Mod_Q3BSP_LoadEffects: funny lump size in %s",loadmodel->name);
5316         count = l->filelen / sizeof(*in);
5317         out = (q3deffect_t *)Mem_Alloc(loadmodel->mempool, count * sizeof(*out));
5318
5319         loadmodel->brushq3.data_effects = out;
5320         loadmodel->brushq3.num_effects = count;
5321
5322         for (i = 0;i < count;i++, in++, out++)
5323         {
5324                 strlcpy (out->shadername, in->shadername, sizeof (out->shadername));
5325                 n = LittleLong(in->brushindex);
5326                 if (n >= loadmodel->brush.num_brushes)
5327                 {
5328                         Con_Printf("Mod_Q3BSP_LoadEffects: invalid brushindex %i (%i brushes), setting to -1\n", n, loadmodel->brush.num_brushes);
5329                         n = -1;
5330                 }
5331                 out->brushindex = n;
5332                 out->unknown = LittleLong(in->unknown);
5333         }
5334 }
5335
5336 static void Mod_Q3BSP_LoadVertices(lump_t *l)
5337 {
5338         q3dvertex_t *in;
5339         int i, count;
5340
5341         in = (q3dvertex_t *)(mod_base + l->fileofs);
5342         if (l->filelen % sizeof(*in))
5343                 Host_Error("Mod_Q3BSP_LoadVertices: funny lump size in %s",loadmodel->name);
5344         loadmodel->brushq3.num_vertices = count = l->filelen / sizeof(*in);
5345         loadmodel->brushq3.data_vertex3f = (float *)Mem_Alloc(loadmodel->mempool, count * (sizeof(float) * (3 + 3 + 2 + 2 + 4)));
5346         loadmodel->brushq3.data_normal3f = loadmodel->brushq3.data_vertex3f + count * 3;
5347         loadmodel->brushq3.data_texcoordtexture2f = loadmodel->brushq3.data_normal3f + count * 3;
5348         loadmodel->brushq3.data_texcoordlightmap2f = loadmodel->brushq3.data_texcoordtexture2f + count * 2;
5349         loadmodel->brushq3.data_color4f = loadmodel->brushq3.data_texcoordlightmap2f + count * 2;
5350
5351         for (i = 0;i < count;i++, in++)
5352         {
5353                 loadmodel->brushq3.data_vertex3f[i * 3 + 0] = LittleFloat(in->origin3f[0]);
5354                 loadmodel->brushq3.data_vertex3f[i * 3 + 1] = LittleFloat(in->origin3f[1]);
5355                 loadmodel->brushq3.data_vertex3f[i * 3 + 2] = LittleFloat(in->origin3f[2]);
5356                 loadmodel->brushq3.data_normal3f[i * 3 + 0] = LittleFloat(in->normal3f[0]);
5357                 loadmodel->brushq3.data_normal3f[i * 3 + 1] = LittleFloat(in->normal3f[1]);
5358                 loadmodel->brushq3.data_normal3f[i * 3 + 2] = LittleFloat(in->normal3f[2]);
5359                 loadmodel->brushq3.data_texcoordtexture2f[i * 2 + 0] = LittleFloat(in->texcoord2f[0]);
5360                 loadmodel->brushq3.data_texcoordtexture2f[i * 2 + 1] = LittleFloat(in->texcoord2f[1]);
5361                 loadmodel->brushq3.data_texcoordlightmap2f[i * 2 + 0] = LittleFloat(in->lightmap2f[0]);
5362                 loadmodel->brushq3.data_texcoordlightmap2f[i * 2 + 1] = LittleFloat(in->lightmap2f[1]);
5363                 // svector/tvector are calculated later in face loading
5364                 if(mod_q3bsp_sRGBlightmaps.integer)
5365                 {
5366                         // if lightmaps are sRGB, vertex colors are sRGB too, so we need to linearize them
5367                         // note: when this is in use, lightmap color 128 is no longer neutral, but "sRGB half power" is
5368                         // working like this may be odd, but matches q3map2 -gamma 2.2
5369                         if(vid_sRGB.integer && vid_sRGB_fallback.integer && !vid.sRGB3D)
5370                         {
5371                                 loadmodel->brushq3.data_color4f[i * 4 + 0] = in->color4ub[0] * (1.0f / 255.0f);
5372                                 loadmodel->brushq3.data_color4f[i * 4 + 1] = in->color4ub[1] * (1.0f / 255.0f);
5373                                 loadmodel->brushq3.data_color4f[i * 4 + 2] = in->color4ub[2] * (1.0f / 255.0f);
5374                                 // we fix the brightness consistently via lightmapscale
5375                         }
5376                         else
5377                         {
5378                                 loadmodel->brushq3.data_color4f[i * 4 + 0] = Image_LinearFloatFromsRGB(in->color4ub[0]);
5379                                 loadmodel->brushq3.data_color4f[i * 4 + 1] = Image_LinearFloatFromsRGB(in->color4ub[1]);
5380                                 loadmodel->brushq3.data_color4f[i * 4 + 2] = Image_LinearFloatFromsRGB(in->color4ub[2]);
5381                         }
5382                 }
5383                 else
5384                 {
5385                         if(vid_sRGB.integer && vid_sRGB_fallback.integer && !vid.sRGB3D)
5386                         {
5387                                 loadmodel->brushq3.data_color4f[i * 4 + 0] = Image_sRGBFloatFromLinear_Lightmap(in->color4ub[0]);
5388                                 loadmodel->brushq3.data_color4f[i * 4 + 1] = Image_sRGBFloatFromLinear_Lightmap(in->color4ub[1]);
5389                                 loadmodel->brushq3.data_color4f[i * 4 + 2] = Image_sRGBFloatFromLinear_Lightmap(in->color4ub[2]);
5390                         }
5391                         else
5392                         {
5393                                 loadmodel->brushq3.data_color4f[i * 4 + 0] = in->color4ub[0] * (1.0f / 255.0f);
5394                                 loadmodel->brushq3.data_color4f[i * 4 + 1] = in->color4ub[1] * (1.0f / 255.0f);
5395                                 loadmodel->brushq3.data_color4f[i * 4 + 2] = in->color4ub[2] * (1.0f / 255.0f);
5396                         }
5397                 }
5398                 loadmodel->brushq3.data_color4f[i * 4 + 3] = in->color4ub[3] * (1.0f / 255.0f);
5399                 if(in->color4ub[0] != 255 || in->color4ub[1] != 255 || in->color4ub[2] != 255)
5400                         loadmodel->lit = true;
5401         }
5402 }
5403
5404 static void Mod_Q3BSP_LoadTriangles(lump_t *l)
5405 {
5406         int *in;
5407         int *out;
5408         int i, count;
5409
5410         in = (int *)(mod_base + l->fileofs);
5411         if (l->filelen % sizeof(int[3]))
5412                 Host_Error("Mod_Q3BSP_LoadTriangles: funny lump size in %s",loadmodel->name);
5413         count = l->filelen / sizeof(*in);
5414
5415         if(!loadmodel->brushq3.num_vertices)
5416         {
5417                 if (count)
5418                         Con_Printf("Mod_Q3BSP_LoadTriangles: %s has triangles but no vertexes, broken compiler, ignoring problem\n", loadmodel->name);
5419                 loadmodel->brushq3.num_triangles = 0;
5420                 return;
5421         }
5422
5423         out = (int *)Mem_Alloc(loadmodel->mempool, count * sizeof(*out));
5424         loadmodel->brushq3.num_triangles = count / 3;
5425         loadmodel->brushq3.data_element3i = out;
5426
5427         for (i = 0;i < count;i++, in++, out++)
5428         {
5429                 *out = LittleLong(*in);
5430                 if (*out < 0 || *out >= loadmodel->brushq3.num_vertices)
5431                 {
5432                         Con_Printf("Mod_Q3BSP_LoadTriangles: invalid vertexindex %i (%i vertices), setting to 0\n", *out, loadmodel->brushq3.num_vertices);
5433                         *out = 0;
5434                 }
5435         }
5436 }
5437
5438 static void Mod_Q3BSP_LoadLightmaps(lump_t *l, lump_t *faceslump)
5439 {
5440         q3dlightmap_t *input_pointer;
5441         int i;
5442         int j;
5443         int k;
5444         int count;
5445         int powerx;
5446         int powery;
5447         int powerxy;
5448         int powerdxy;
5449         int endlightmap;
5450         int mergegoal;
5451         int lightmapindex;
5452         int realcount;
5453         int realindex;
5454         int mergedwidth;
5455         int mergedheight;
5456         int mergedcolumns;
5457         int mergedrows;
5458         int mergedrowsxcolumns;
5459         int size;
5460         int bytesperpixel;
5461         int rgbmap[3];
5462         unsigned char *c;
5463         unsigned char *mergedpixels;
5464         unsigned char *mergeddeluxepixels;
5465         unsigned char *mergebuf;
5466         char mapname[MAX_QPATH];
5467         qboolean external;
5468         unsigned char *inpixels[10000]; // max count q3map2 can output (it uses 4 digits)
5469         char vabuf[1024];
5470
5471         // defaults for q3bsp
5472         size = 128;
5473         bytesperpixel = 3;
5474         rgbmap[0] = 2;
5475         rgbmap[1] = 1;
5476         rgbmap[2] = 0;
5477         external = false;
5478         loadmodel->brushq3.lightmapsize = 128;
5479
5480         if (cls.state == ca_dedicated)
5481                 return;
5482
5483         if(mod_q3bsp_nolightmaps.integer)
5484         {
5485                 return;
5486         }
5487         else if(l->filelen)
5488         {
5489                 // prefer internal LMs for compatibility (a BSP contains no info on whether external LMs exist)
5490                 if (developer_loading.integer)
5491                         Con_Printf("Using internal lightmaps\n");
5492                 input_pointer = (q3dlightmap_t *)(mod_base + l->fileofs);
5493                 if (l->filelen % sizeof(*input_pointer))
5494                         Host_Error("Mod_Q3BSP_LoadLightmaps: funny lump size in %s",loadmodel->name);
5495                 count = l->filelen / sizeof(*input_pointer);
5496                 for(i = 0; i < count; ++i)
5497                         inpixels[i] = input_pointer[i].rgb;
5498         }
5499         else
5500         {
5501                 // no internal lightmaps
5502                 // try external lightmaps
5503                 if (developer_loading.integer)
5504                         Con_Printf("Using external lightmaps\n");
5505                 FS_StripExtension(loadmodel->name, mapname, sizeof(mapname));
5506                 inpixels[0] = loadimagepixelsbgra(va(vabuf, sizeof(vabuf), "%s/lm_%04d", mapname, 0), false, false, false, NULL);
5507                 if(!inpixels[0])
5508                         return;
5509
5510                 // using EXTERNAL lightmaps instead
5511                 if(image_width != (int) CeilPowerOf2(image_width) || image_width != image_height)
5512                 {
5513                         Mem_Free(inpixels[0]);
5514                         Host_Error("Mod_Q3BSP_LoadLightmaps: invalid external lightmap size in %s",loadmodel->name);
5515                 }
5516
5517                 size = image_width;
5518                 bytesperpixel = 4;
5519                 rgbmap[0] = 0;
5520                 rgbmap[1] = 1;
5521                 rgbmap[2] = 2;
5522                 external = true;
5523
5524                 for(count = 1; ; ++count)
5525                 {
5526                         inpixels[count] = loadimagepixelsbgra(va(vabuf, sizeof(vabuf), "%s/lm_%04d", mapname, count), false, false, false, NULL);
5527                         if(!inpixels[count])
5528                                 break; // we got all of them
5529                         if(image_width != size || image_height != size)
5530                         {
5531                                 Mem_Free(inpixels[count]);
5532                                 inpixels[count] = NULL;
5533                                 Con_Printf("Mod_Q3BSP_LoadLightmaps: mismatched lightmap size in %s - external lightmap %s/lm_%04d does not match earlier ones\n", loadmodel->name, mapname, count);
5534                                 break;
5535                         }
5536                 }
5537         }
5538
5539         loadmodel->brushq3.lightmapsize = size;
5540         loadmodel->brushq3.num_originallightmaps = count;
5541
5542         // now check the surfaces to see if any of them index an odd numbered
5543         // lightmap, if so this is not a deluxemapped bsp file
5544         //
5545         // also check what lightmaps are actually used, because q3map2 sometimes
5546         // (always?) makes an unused one at the end, which
5547         // q3map2 sometimes (or always?) makes a second blank lightmap for no
5548         // reason when only one lightmap is used, which can throw off the
5549         // deluxemapping detection method, so check 2-lightmap bsp's specifically
5550         // to see if the second lightmap is blank, if so it is not deluxemapped.
5551         // VorteX: autodetect only if previous attempt to find "deluxeMaps" key
5552         // in Mod_Q3BSP_LoadEntities was failed
5553         if (!loadmodel->brushq3.deluxemapping)
5554         {
5555                 loadmodel->brushq3.deluxemapping = !(count & 1);
5556                 loadmodel->brushq3.deluxemapping_modelspace = true;
5557                 endlightmap = 0;
5558                 if (loadmodel->brushq3.deluxemapping)
5559                 {
5560                         int facecount = faceslump->filelen / sizeof(q3dface_t);
5561                         q3dface_t *faces = (q3dface_t *)(mod_base + faceslump->fileofs);
5562                         for (i = 0;i < facecount;i++)
5563                         {
5564                                 j = LittleLong(faces[i].lightmapindex);
5565                                 if (j >= 0)
5566                                 {
5567                                         endlightmap = max(endlightmap, j + 1);
5568                                         if ((j & 1) || j + 1 >= count)
5569                                         {
5570                                                 loadmodel->brushq3.deluxemapping = false;
5571                                                 break;
5572                                         }
5573                                 }
5574                         }
5575                 }
5576
5577                 // q3map2 sometimes (or always?) makes a second blank lightmap for no
5578                 // reason when only one lightmap is used, which can throw off the
5579                 // deluxemapping detection method, so check 2-lightmap bsp's specifically
5580                 // to see if the second lightmap is blank, if so it is not deluxemapped.
5581                 //
5582                 // further research has shown q3map2 sometimes creates a deluxemap and two
5583                 // blank lightmaps, which must be handled properly as well
5584                 if (endlightmap == 1 && count > 1)
5585                 {
5586                         c = inpixels[1];
5587                         for (i = 0;i < size*size;i++)
5588                         {
5589                                 if (c[bytesperpixel*i + rgbmap[0]])
5590                                         break;
5591                                 if (c[bytesperpixel*i + rgbmap[1]])
5592                                         break;
5593                                 if (c[bytesperpixel*i + rgbmap[2]])
5594                                         break;
5595                         }
5596                         if (i == size*size)
5597                         {
5598                                 // all pixels in the unused lightmap were black...
5599                                 loadmodel->brushq3.deluxemapping = false;
5600                         }
5601                 }
5602         }
5603
5604         Con_DPrintf("%s is %sdeluxemapped\n", loadmodel->name, loadmodel->brushq3.deluxemapping ? "" : "not ");
5605
5606         // figure out what the most reasonable merge power is within limits
5607
5608         // find the appropriate NxN dimensions to merge to, to avoid wasted space
5609         realcount = count >> (int)loadmodel->brushq3.deluxemapping;
5610
5611         // figure out how big the merged texture has to be
5612         mergegoal = 128<<bound(0, mod_q3bsp_lightmapmergepower.integer, 6);
5613         mergegoal = bound(size, mergegoal, (int)vid.maxtexturesize_2d);
5614         while (mergegoal > size && mergegoal * mergegoal / 4 >= size * size * realcount)
5615                 mergegoal /= 2;
5616         mergedwidth = mergegoal;
5617         mergedheight = mergegoal;
5618         // choose non-square size (2x1 aspect) if only half the space is used;
5619         // this really only happens when the entire set fits in one texture, if
5620         // there are multiple textures, we don't worry about shrinking the last
5621         // one to fit, because the driver prefers the same texture size on
5622         // consecutive draw calls...
5623         if (mergedwidth * mergedheight / 2 >= size*size*realcount)
5624                 mergedheight /= 2;
5625
5626         loadmodel->brushq3.num_lightmapmergedwidthpower = 0;
5627         loadmodel->brushq3.num_lightmapmergedheightpower = 0;
5628         while (mergedwidth > size<<loadmodel->brushq3.num_lightmapmergedwidthpower)
5629                 loadmodel->brushq3.num_lightmapmergedwidthpower++;
5630         while (mergedheight > size<<loadmodel->brushq3.num_lightmapmergedheightpower)
5631                 loadmodel->brushq3.num_lightmapmergedheightpower++;
5632         loadmodel->brushq3.num_lightmapmergedwidthheightdeluxepower = loadmodel->brushq3.num_lightmapmergedwidthpower + loadmodel->brushq3.num_lightmapmergedheightpower + (loadmodel->brushq3.deluxemapping ? 1 : 0);
5633
5634         powerx = loadmodel->brushq3.num_lightmapmergedwidthpower;
5635         powery = loadmodel->brushq3.num_lightmapmergedheightpower;
5636         powerxy = powerx+powery;
5637         powerdxy = loadmodel->brushq3.deluxemapping + powerxy;
5638
5639         mergedcolumns = 1 << powerx;
5640         mergedrows = 1 << powery;
5641         mergedrowsxcolumns = 1 << powerxy;
5642
5643         loadmodel->brushq3.num_mergedlightmaps = (realcount + (1 << powerxy) - 1) >> powerxy;
5644         loadmodel->brushq3.data_lightmaps = (rtexture_t **)Mem_Alloc(loadmodel->mempool, loadmodel->brushq3.num_mergedlightmaps * sizeof(rtexture_t *));
5645         if (loadmodel->brushq3.deluxemapping)
5646                 loadmodel->brushq3.data_deluxemaps = (rtexture_t **)Mem_Alloc(loadmodel->mempool, loadmodel->brushq3.num_mergedlightmaps * sizeof(rtexture_t *));
5647
5648         // allocate a texture pool if we need it
5649         if (loadmodel->texturepool == NULL && cls.state != ca_dedicated)
5650                 loadmodel->texturepool = R_AllocTexturePool();
5651
5652         mergedpixels = (unsigned char *) Mem_Alloc(tempmempool, mergedwidth * mergedheight * 4);
5653         mergeddeluxepixels = loadmodel->brushq3.deluxemapping ? (unsigned char *) Mem_Alloc(tempmempool, mergedwidth * mergedheight * 4) : NULL;
5654         for (i = 0;i < count;i++)
5655         {
5656                 // figure out which merged lightmap texture this fits into
5657                 realindex = i >> (int)loadmodel->brushq3.deluxemapping;
5658                 lightmapindex = i >> powerdxy;
5659
5660                 // choose the destination address
5661                 mergebuf = (loadmodel->brushq3.deluxemapping && (i & 1)) ? mergeddeluxepixels : mergedpixels;
5662                 mergebuf += 4 * (realindex & (mergedcolumns-1))*size + 4 * ((realindex >> powerx) & (mergedrows-1))*mergedwidth*size;
5663                 if ((i & 1) == 0 || !loadmodel->brushq3.deluxemapping)
5664                         Con_DPrintf("copying original lightmap %i (%ix%i) to %i (at %i,%i)\n", i, size, size, lightmapindex, (realindex & (mergedcolumns-1))*size, ((realindex >> powerx) & (mergedrows-1))*size);
5665
5666                 // convert pixels from RGB or BGRA while copying them into the destination rectangle
5667                 for (j = 0;j < size;j++)
5668                 for (k = 0;k < size;k++)
5669                 {
5670                         mergebuf[(j*mergedwidth+k)*4+0] = inpixels[i][(j*size+k)*bytesperpixel+rgbmap[0]];
5671                         mergebuf[(j*mergedwidth+k)*4+1] = inpixels[i][(j*size+k)*bytesperpixel+rgbmap[1]];
5672                         mergebuf[(j*mergedwidth+k)*4+2] = inpixels[i][(j*size+k)*bytesperpixel+rgbmap[2]];
5673                         mergebuf[(j*mergedwidth+k)*4+3] = 255;
5674                 }
5675
5676                 // upload texture if this was the last tile being written to the texture
5677                 if (((realindex + 1) & (mergedrowsxcolumns - 1)) == 0 || (realindex + 1) == realcount)
5678                 {
5679                         if (loadmodel->brushq3.deluxemapping && (i & 1))
5680                                 loadmodel->brushq3.data_deluxemaps[lightmapindex] = R_LoadTexture2D(loadmodel->texturepool, va(vabuf, sizeof(vabuf), "deluxemap%04i", lightmapindex), mergedwidth, mergedheight, mergeddeluxepixels, TEXTYPE_BGRA, TEXF_FORCELINEAR | (gl_texturecompression_q3bspdeluxemaps.integer ? TEXF_COMPRESS : 0), -1, NULL);
5681                         else
5682                         {
5683                                 if(mod_q3bsp_sRGBlightmaps.integer)
5684                                 {
5685                                         textype_t t;
5686                                         if(vid_sRGB.integer && vid_sRGB_fallback.integer && !vid.sRGB3D)
5687                                         {
5688                                                 t = TEXTYPE_BGRA; // in stupid fallback mode, we upload lightmaps in sRGB form and just fix their brightness
5689                                                 // we fix the brightness consistently via lightmapscale
5690                                         }
5691                                         else
5692                                                 t = TEXTYPE_SRGB_BGRA; // normally, we upload lightmaps in sRGB form (possibly downconverted to linear)
5693                                         loadmodel->brushq3.data_lightmaps [lightmapindex] = R_LoadTexture2D(loadmodel->texturepool, va(vabuf, sizeof(vabuf), "lightmap%04i", lightmapindex), mergedwidth, mergedheight, mergedpixels, t, TEXF_FORCELINEAR | (gl_texturecompression_q3bsplightmaps.integer ? TEXF_COMPRESS : 0), -1, NULL);
5694                                 }
5695                                 else
5696                                 {
5697                                         if(vid_sRGB.integer && vid_sRGB_fallback.integer && !vid.sRGB3D)
5698                                                 Image_MakesRGBColorsFromLinear_Lightmap(mergedpixels, mergedpixels, mergedwidth * mergedheight);
5699                                         loadmodel->brushq3.data_lightmaps [lightmapindex] = R_LoadTexture2D(loadmodel->texturepool, va(vabuf, sizeof(vabuf), "lightmap%04i", lightmapindex), mergedwidth, mergedheight, mergedpixels, TEXTYPE_BGRA, TEXF_FORCELINEAR | (gl_texturecompression_q3bsplightmaps.integer ? TEXF_COMPRESS : 0), -1, NULL);
5700                                 }
5701                         }
5702                 }
5703         }
5704
5705         if (mergeddeluxepixels)
5706                 Mem_Free(mergeddeluxepixels);
5707         Mem_Free(mergedpixels);
5708         if(external)
5709         {
5710                 for(i = 0; i < count; ++i)
5711                         Mem_Free(inpixels[i]);
5712         }
5713 }
5714
5715 static void Mod_Q3BSP_BuildBBoxes(const int *element3i, int num_triangles, const float *vertex3f, float **collisionbbox6f, int *collisionstride, int stride)
5716 {
5717         int j, k, cnt, tri;
5718         float *mins, *maxs;
5719         const float *vert;
5720         *collisionstride = stride;
5721         if(stride > 0)
5722         {
5723                 cnt = (num_triangles + stride - 1) / stride;
5724                 *collisionbbox6f = (float *) Mem_Alloc(loadmodel->mempool, sizeof(float[6]) * cnt);
5725                 for(j = 0; j < cnt; ++j)
5726                 {
5727                         mins = &((*collisionbbox6f)[6 * j + 0]);
5728                         maxs = &((*collisionbbox6f)[6 * j + 3]);
5729                         for(k = 0; k < stride; ++k)
5730                         {
5731                                 tri = j * stride + k;
5732                                 if(tri >= num_triangles)
5733                                         break;
5734                                 vert = &(vertex3f[element3i[3 * tri + 0] * 3]);
5735                                 if(!k || vert[0] < mins[0]) mins[0] = vert[0];
5736                                 if(!k || vert[1] < mins[1]) mins[1] = vert[1];
5737                                 if(!k || vert[2] < mins[2]) mins[2] = vert[2];
5738                                 if(!k || vert[0] > maxs[0]) maxs[0] = vert[0];
5739                                 if(!k || vert[1] > maxs[1]) maxs[1] = vert[1];
5740                                 if(!k || vert[2] > maxs[2]) maxs[2] = vert[2];
5741                                 vert = &(vertex3f[element3i[3 * tri + 1] * 3]);
5742                                 if(vert[0] < mins[0]) mins[0] = vert[0];
5743                                 if(vert[1] < mins[1]) mins[1] = vert[1];
5744                                 if(vert[2] < mins[2]) mins[2] = vert[2];
5745                                 if(vert[0] > maxs[0]) maxs[0] = vert[0];
5746                                 if(vert[1] > maxs[1]) maxs[1] = vert[1];
5747                                 if(vert[2] > maxs[2]) maxs[2] = vert[2];
5748                                 vert = &(vertex3f[element3i[3 * tri + 2] * 3]);
5749                                 if(vert[0] < mins[0]) mins[0] = vert[0];
5750                                 if(vert[1] < mins[1]) mins[1] = vert[1];
5751                                 if(vert[2] < mins[2]) mins[2] = vert[2];
5752                                 if(vert[0] > maxs[0]) maxs[0] = vert[0];
5753                                 if(vert[1] > maxs[1]) maxs[1] = vert[1];
5754                                 if(vert[2] > maxs[2]) maxs[2] = vert[2];
5755                         }
5756                 }
5757         }
5758         else
5759                 *collisionbbox6f = NULL;
5760 }
5761
5762 typedef struct patchtess_s
5763 {
5764         patchinfo_t info;
5765
5766         // Auxiliary data used only by patch loading code in Mod_Q3BSP_LoadFaces
5767         int surface_id;
5768         float lodgroup[6];
5769         float *originalvertex3f;
5770 } patchtess_t;
5771
5772 #define PATCHTESS_SAME_LODGROUP(a,b) \
5773         ( \
5774                 (a).lodgroup[0] == (b).lodgroup[0] && \
5775                 (a).lodgroup[1] == (b).lodgroup[1] && \
5776                 (a).lodgroup[2] == (b).lodgroup[2] && \
5777                 (a).lodgroup[3] == (b).lodgroup[3] && \
5778                 (a).lodgroup[4] == (b).lodgroup[4] && \
5779                 (a).lodgroup[5] == (b).lodgroup[5] \
5780         )
5781
5782 static void Mod_Q3BSP_LoadFaces(lump_t *l)
5783 {
5784         q3dface_t *in, *oldin;
5785         msurface_t *out, *oldout;
5786         int i, oldi, j, n, count, invalidelements, patchsize[2], finalwidth, finalheight, xtess, ytess, finalvertices, finaltriangles, firstvertex, firstelement, type, oldnumtriangles, oldnumtriangles2, meshvertices, meshtriangles, collisionvertices, collisiontriangles, numvertices, numtriangles, cxtess, cytess;
5787         float lightmaptcbase[2], lightmaptcscale[2];
5788         //int *originalelement3i;
5789         //int *originalneighbor3i;
5790         float *originalvertex3f;
5791         //float *originalsvector3f;
5792         //float *originaltvector3f;
5793         float *originalnormal3f;
5794         float *originalcolor4f;
5795         float *originaltexcoordtexture2f;
5796         float *originaltexcoordlightmap2f;
5797         float *surfacecollisionvertex3f;
5798         int *surfacecollisionelement3i;
5799         float *v;
5800         patchtess_t *patchtess = NULL;
5801         int patchtesscount = 0;
5802         qboolean again;
5803
5804         in = (q3dface_t *)(mod_base + l->fileofs);
5805         if (l->filelen % sizeof(*in))
5806                 Host_Error("Mod_Q3BSP_LoadFaces: funny lump size in %s",loadmodel->name);
5807         count = l->filelen / sizeof(*in);
5808         out = (msurface_t *)Mem_Alloc(loadmodel->mempool, count * sizeof(*out));
5809
5810         loadmodel->data_surfaces = out;
5811         loadmodel->num_surfaces = count;
5812
5813         if(count > 0)
5814                 patchtess = (patchtess_t*) Mem_Alloc(tempmempool, count * sizeof(*patchtess));
5815
5816         i = 0;
5817         oldi = i;
5818         oldin = in;
5819         oldout = out;
5820         meshvertices = 0;
5821         meshtriangles = 0;
5822         for (;i < count;i++, in++, out++)
5823         {
5824                 // check face type first
5825                 type = LittleLong(in->type);
5826                 if (type != Q3FACETYPE_FLAT
5827                  && type != Q3FACETYPE_PATCH
5828                  && type != Q3FACETYPE_MESH
5829                  && type != Q3FACETYPE_FLARE)
5830                 {
5831                         Con_DPrintf("Mod_Q3BSP_LoadFaces: face #%i: unknown face type %i\n", i, type);
5832                         continue;
5833                 }
5834
5835                 n = LittleLong(in->textureindex);
5836                 if (n < 0 || n >= loadmodel->num_textures)
5837                 {
5838                         Con_DPrintf("Mod_Q3BSP_LoadFaces: face #%i: invalid textureindex %i (%i textures)\n", i, n, loadmodel->num_textures);
5839                         continue;
5840                 }
5841                 out->texture = loadmodel->data_textures + n;
5842                 n = LittleLong(in->effectindex);
5843                 if (n < -1 || n >= loadmodel->brushq3.num_effects)
5844                 {
5845                         if (developer_extra.integer)
5846                                 Con_DPrintf("Mod_Q3BSP_LoadFaces: face #%i (texture \"%s\"): invalid effectindex %i (%i effects)\n", i, out->texture->name, n, loadmodel->brushq3.num_effects);
5847                         n = -1;
5848                 }
5849                 if (n == -1)
5850                         out->effect = NULL;
5851                 else
5852                         out->effect = loadmodel->brushq3.data_effects + n;
5853
5854                 if (cls.state != ca_dedicated)
5855                 {
5856                         out->lightmaptexture = NULL;
5857                         out->deluxemaptexture = r_texture_blanknormalmap;
5858                         n = LittleLong(in->lightmapindex);
5859                         if (n < 0)
5860                                 n = -1;
5861                         else if (n >= loadmodel->brushq3.num_originallightmaps)
5862                         {
5863                                 if(loadmodel->brushq3.num_originallightmaps != 0)
5864                                         Con_Printf("Mod_Q3BSP_LoadFaces: face #%i (texture \"%s\"): invalid lightmapindex %i (%i lightmaps)\n", i, out->texture->name, n, loadmodel->brushq3.num_originallightmaps);
5865                                 n = -1;
5866                         }
5867                         else
5868                         {
5869                                 out->lightmaptexture = loadmodel->brushq3.data_lightmaps[n >> loadmodel->brushq3.num_lightmapmergedwidthheightdeluxepower];
5870                                 if (loadmodel->brushq3.deluxemapping)
5871                                         out->deluxemaptexture = loadmodel->brushq3.data_deluxemaps[n >> loadmodel->brushq3.num_lightmapmergedwidthheightdeluxepower];
5872                                 loadmodel->lit = true;
5873                         }
5874                 }
5875
5876                 firstvertex = LittleLong(in->firstvertex);
5877                 numvertices = LittleLong(in->numvertices);
5878                 firstelement = LittleLong(in->firstelement);
5879                 numtriangles = LittleLong(in->numelements) / 3;
5880                 if (numtriangles * 3 != LittleLong(in->numelements))
5881                 {
5882                         Con_Printf("Mod_Q3BSP_LoadFaces: face #%i (texture \"%s\"): numelements %i is not a multiple of 3\n", i, out->texture->name, LittleLong(in->numelements));
5883                         continue;
5884                 }
5885                 if (firstvertex < 0 || firstvertex + numvertices > loadmodel->brushq3.num_vertices)
5886                 {
5887                         Con_Printf("Mod_Q3BSP_LoadFaces: face #%i (texture \"%s\"): invalid vertex range %i : %i (%i vertices)\n", i, out->texture->name, firstvertex, firstvertex + numvertices, loadmodel->brushq3.num_vertices);
5888                         continue;
5889                 }
5890                 if (firstelement < 0 || firstelement + numtriangles * 3 > loadmodel->brushq3.num_triangles * 3)
5891                 {
5892                         Con_Printf("Mod_Q3BSP_LoadFaces: face #%i (texture \"%s\"): invalid element range %i : %i (%i elements)\n", i, out->texture->name, firstelement, firstelement + numtriangles * 3, loadmodel->brushq3.num_triangles * 3);
5893                         continue;
5894                 }
5895                 switch(type)
5896                 {
5897                 case Q3FACETYPE_FLAT:
5898                 case Q3FACETYPE_MESH:
5899                         // no processing necessary
5900                         break;
5901                 case Q3FACETYPE_PATCH:
5902                         patchsize[0] = LittleLong(in->specific.patch.patchsize[0]);
5903                         patchsize[1] = LittleLong(in->specific.patch.patchsize[1]);
5904                         if (numvertices != (patchsize[0] * patchsize[1]) || patchsize[0] < 3 || patchsize[1] < 3 || !(patchsize[0] & 1) || !(patchsize[1] & 1) || patchsize[0] * patchsize[1] >= min(r_subdivisions_maxvertices.integer, r_subdivisions_collision_maxvertices.integer))
5905                         {
5906                                 Con_Printf("Mod_Q3BSP_LoadFaces: face #%i (texture \"%s\"): invalid patchsize %ix%i\n", i, out->texture->name, patchsize[0], patchsize[1]);
5907                                 continue;
5908                         }
5909                         originalvertex3f = loadmodel->brushq3.data_vertex3f + firstvertex * 3;
5910
5911                         // convert patch to Q3FACETYPE_MESH
5912                         xtess = Q3PatchTesselationOnX(patchsize[0], patchsize[1], 3, originalvertex3f, r_subdivisions_tolerance.value);
5913                         ytess = Q3PatchTesselationOnY(patchsize[0], patchsize[1], 3, originalvertex3f, r_subdivisions_tolerance.value);
5914                         // bound to user settings
5915                         xtess = bound(r_subdivisions_mintess.integer, xtess, r_subdivisions_maxtess.integer);
5916                         ytess = bound(r_subdivisions_mintess.integer, ytess, r_subdivisions_maxtess.integer);
5917                         // bound to sanity settings
5918                         xtess = bound(0, xtess, 1024);
5919                         ytess = bound(0, ytess, 1024);
5920
5921                         // lower quality collision patches! Same procedure as before, but different cvars
5922                         // convert patch to Q3FACETYPE_MESH
5923                         cxtess = Q3PatchTesselationOnX(patchsize[0], patchsize[1], 3, originalvertex3f, r_subdivisions_collision_tolerance.value);
5924                         cytess = Q3PatchTesselationOnY(patchsize[0], patchsize[1], 3, originalvertex3f, r_subdivisions_collision_tolerance.value);
5925                         // bound to user settings
5926                         cxtess = bound(r_subdivisions_collision_mintess.integer, cxtess, r_subdivisions_collision_maxtess.integer);
5927                         cytess = bound(r_subdivisions_collision_mintess.integer, cytess, r_subdivisions_collision_maxtess.integer);
5928                         // bound to sanity settings
5929                         cxtess = bound(0, cxtess, 1024);
5930                         cytess = bound(0, cytess, 1024);
5931
5932                         // store it for the LOD grouping step
5933                         patchtess[patchtesscount].info.xsize = patchsize[0];
5934                         patchtess[patchtesscount].info.ysize = patchsize[1];
5935                         patchtess[patchtesscount].info.lods[PATCH_LOD_VISUAL].xtess = xtess;
5936                         patchtess[patchtesscount].info.lods[PATCH_LOD_VISUAL].ytess = ytess;
5937                         patchtess[patchtesscount].info.lods[PATCH_LOD_COLLISION].xtess = cxtess;
5938                         patchtess[patchtesscount].info.lods[PATCH_LOD_COLLISION].ytess = cytess;
5939
5940                         patchtess[patchtesscount].surface_id = i;
5941                         patchtess[patchtesscount].lodgroup[0] = LittleFloat(in->specific.patch.mins[0]);
5942                         patchtess[patchtesscount].lodgroup[1] = LittleFloat(in->specific.patch.mins[1]);
5943                         patchtess[patchtesscount].lodgroup[2] = LittleFloat(in->specific.patch.mins[2]);
5944                         patchtess[patchtesscount].lodgroup[3] = LittleFloat(in->specific.patch.maxs[0]);
5945                         patchtess[patchtesscount].lodgroup[4] = LittleFloat(in->specific.patch.maxs[1]);
5946                         patchtess[patchtesscount].lodgroup[5] = LittleFloat(in->specific.patch.maxs[2]);
5947                         patchtess[patchtesscount].originalvertex3f = originalvertex3f;
5948                         ++patchtesscount;
5949                         break;
5950                 case Q3FACETYPE_FLARE:
5951                         if (developer_extra.integer)
5952                                 Con_DPrintf("Mod_Q3BSP_LoadFaces: face #%i (texture \"%s\"): Q3FACETYPE_FLARE not supported (yet)\n", i, out->texture->name);
5953                         // don't render it
5954                         continue;
5955                 }
5956                 out->num_vertices = numvertices;
5957                 out->num_triangles = numtriangles;
5958                 meshvertices += out->num_vertices;
5959                 meshtriangles += out->num_triangles;
5960         }
5961
5962         // Fix patches tesselations so that they make no seams
5963         do
5964         {
5965                 again = false;
5966                 for(i = 0; i < patchtesscount; ++i)
5967                 {
5968                         for(j = i+1; j < patchtesscount; ++j)
5969                         {
5970                                 if (!PATCHTESS_SAME_LODGROUP(patchtess[i], patchtess[j]))
5971                                         continue;
5972
5973                                 if (Q3PatchAdjustTesselation(3, &patchtess[i].info, patchtess[i].originalvertex3f, &patchtess[j].info, patchtess[j].originalvertex3f) )
5974                                         again = true;
5975                         }
5976                 }
5977         }
5978         while (again);
5979
5980         // Calculate resulting number of triangles
5981         collisionvertices = 0;
5982         collisiontriangles = 0;
5983         for(i = 0; i < patchtesscount; ++i)
5984         {
5985                 finalwidth = Q3PatchDimForTess(patchtess[i].info.xsize, patchtess[i].info.lods[PATCH_LOD_VISUAL].xtess);
5986                 finalheight = Q3PatchDimForTess(patchtess[i].info.ysize,patchtess[i].info.lods[PATCH_LOD_VISUAL].ytess);
5987                 numvertices = finalwidth * finalheight;
5988                 numtriangles = (finalwidth - 1) * (finalheight - 1) * 2;
5989
5990                 oldout[patchtess[i].surface_id].num_vertices = numvertices;
5991                 oldout[patchtess[i].surface_id].num_triangles = numtriangles;
5992                 meshvertices += oldout[patchtess[i].surface_id].num_vertices;
5993                 meshtriangles += oldout[patchtess[i].surface_id].num_triangles;
5994
5995                 finalwidth = Q3PatchDimForTess(patchtess[i].info.xsize, patchtess[i].info.lods[PATCH_LOD_COLLISION].xtess);
5996                 finalheight = Q3PatchDimForTess(patchtess[i].info.ysize,patchtess[i].info.lods[PATCH_LOD_COLLISION].ytess);
5997                 numvertices = finalwidth * finalheight;
5998                 numtriangles = (finalwidth - 1) * (finalheight - 1) * 2;
5999
6000                 oldout[patchtess[i].surface_id].num_collisionvertices = numvertices;
6001                 oldout[patchtess[i].surface_id].num_collisiontriangles = numtriangles;
6002                 collisionvertices += oldout[patchtess[i].surface_id].num_collisionvertices;
6003                 collisiontriangles += oldout[patchtess[i].surface_id].num_collisiontriangles;
6004         }
6005
6006         i = oldi;
6007         in = oldin;
6008         out = oldout;
6009         Mod_AllocSurfMesh(loadmodel->mempool, meshvertices, meshtriangles, false, true, false);
6010         if (collisiontriangles)
6011         {
6012                 loadmodel->brush.data_collisionvertex3f = (float *)Mem_Alloc(loadmodel->mempool, collisionvertices * sizeof(float[3]));
6013                 loadmodel->brush.data_collisionelement3i = (int *)Mem_Alloc(loadmodel->mempool, collisiontriangles * sizeof(int[3]));
6014         }
6015         meshvertices = 0;
6016         meshtriangles = 0;
6017         collisionvertices = 0;
6018         collisiontriangles = 0;
6019         for (;i < count && meshvertices + out->num_vertices <= loadmodel->surfmesh.num_vertices;i++, in++, out++)
6020         {
6021                 if (out->num_vertices < 3 || out->num_triangles < 1)
6022                         continue;
6023
6024                 type = LittleLong(in->type);
6025                 firstvertex = LittleLong(in->firstvertex);
6026                 firstelement = LittleLong(in->firstelement);
6027                 out->num_firstvertex = meshvertices;
6028                 out->num_firsttriangle = meshtriangles;
6029                 out->num_firstcollisiontriangle = collisiontriangles;
6030                 switch(type)
6031                 {
6032                 case Q3FACETYPE_FLAT:
6033                 case Q3FACETYPE_MESH:
6034                         // no processing necessary, except for lightmap merging
6035                         for (j = 0;j < out->num_vertices;j++)
6036                         {
6037                                 (loadmodel->surfmesh.data_vertex3f + 3 * out->num_firstvertex)[j * 3 + 0] = loadmodel->brushq3.data_vertex3f[(firstvertex + j) * 3 + 0];
6038                                 (loadmodel->surfmesh.data_vertex3f + 3 * out->num_firstvertex)[j * 3 + 1] = loadmodel->brushq3.data_vertex3f[(firstvertex + j) * 3 + 1];
6039                                 (loadmodel->surfmesh.data_vertex3f + 3 * out->num_firstvertex)[j * 3 + 2] = loadmodel->brushq3.data_vertex3f[(firstvertex + j) * 3 + 2];
6040                                 (loadmodel->surfmesh.data_normal3f + 3 * out->num_firstvertex)[j * 3 + 0] = loadmodel->brushq3.data_normal3f[(firstvertex + j) * 3 + 0];
6041                                 (loadmodel->surfmesh.data_normal3f + 3 * out->num_firstvertex)[j * 3 + 1] = loadmodel->brushq3.data_normal3f[(firstvertex + j) * 3 + 1];
6042                                 (loadmodel->surfmesh.data_normal3f + 3 * out->num_firstvertex)[j * 3 + 2] = loadmodel->brushq3.data_normal3f[(firstvertex + j) * 3 + 2];
6043                                 (loadmodel->surfmesh.data_texcoordtexture2f + 2 * out->num_firstvertex)[j * 2 + 0] = loadmodel->brushq3.data_texcoordtexture2f[(firstvertex + j) * 2 + 0];
6044                                 (loadmodel->surfmesh.data_texcoordtexture2f + 2 * out->num_firstvertex)[j * 2 + 1] = loadmodel->brushq3.data_texcoordtexture2f[(firstvertex + j) * 2 + 1];
6045                                 (loadmodel->surfmesh.data_texcoordlightmap2f + 2 * out->num_firstvertex)[j * 2 + 0] = loadmodel->brushq3.data_texcoordlightmap2f[(firstvertex + j) * 2 + 0];
6046                                 (loadmodel->surfmesh.data_texcoordlightmap2f + 2 * out->num_firstvertex)[j * 2 + 1] = loadmodel->brushq3.data_texcoordlightmap2f[(firstvertex + j) * 2 + 1];
6047                                 (loadmodel->surfmesh.data_lightmapcolor4f + 4 * out->num_firstvertex)[j * 4 + 0] = loadmodel->brushq3.data_color4f[(firstvertex + j) * 4 + 0];
6048                                 (loadmodel->surfmesh.data_lightmapcolor4f + 4 * out->num_firstvertex)[j * 4 + 1] = loadmodel->brushq3.data_color4f[(firstvertex + j) * 4 + 1];
6049                                 (loadmodel->surfmesh.data_lightmapcolor4f + 4 * out->num_firstvertex)[j * 4 + 2] = loadmodel->brushq3.data_color4f[(firstvertex + j) * 4 + 2];
6050                                 (loadmodel->surfmesh.data_lightmapcolor4f + 4 * out->num_firstvertex)[j * 4 + 3] = loadmodel->brushq3.data_color4f[(firstvertex + j) * 4 + 3];
6051                         }
6052                         for (j = 0;j < out->num_triangles*3;j++)
6053                                 (loadmodel->surfmesh.data_element3i + 3 * out->num_firsttriangle)[j] = loadmodel->brushq3.data_element3i[firstelement + j] + out->num_firstvertex;
6054                         break;
6055                 case Q3FACETYPE_PATCH:
6056                         patchsize[0] = LittleLong(in->specific.patch.patchsize[0]);
6057                         patchsize[1] = LittleLong(in->specific.patch.patchsize[1]);
6058                         originalvertex3f = loadmodel->brushq3.data_vertex3f + firstvertex * 3;
6059                         originalnormal3f = loadmodel->brushq3.data_normal3f + firstvertex * 3;
6060                         originaltexcoordtexture2f = loadmodel->brushq3.data_texcoordtexture2f + firstvertex * 2;
6061                         originaltexcoordlightmap2f = loadmodel->brushq3.data_texcoordlightmap2f + firstvertex * 2;
6062                         originalcolor4f = loadmodel->brushq3.data_color4f + firstvertex * 4;
6063
6064                         xtess = ytess = cxtess = cytess = -1;
6065                         for(j = 0; j < patchtesscount; ++j)
6066                                 if(patchtess[j].surface_id == i)
6067                                 {
6068                                         xtess = patchtess[j].info.lods[PATCH_LOD_VISUAL].xtess;
6069                                         ytess = patchtess[j].info.lods[PATCH_LOD_VISUAL].ytess;
6070                                         cxtess = patchtess[j].info.lods[PATCH_LOD_COLLISION].xtess;
6071                                         cytess = patchtess[j].info.lods[PATCH_LOD_COLLISION].ytess;
6072                                         break;
6073                                 }
6074                         if(xtess == -1)
6075                         {
6076                                 Con_Printf("ERROR: patch %d isn't preprocessed?!?\n", i);
6077                                 xtess = ytess = cxtess = cytess = 0;
6078                         }
6079
6080                         finalwidth = Q3PatchDimForTess(patchsize[0],xtess); //((patchsize[0] - 1) * xtess) + 1;
6081                         finalheight = Q3PatchDimForTess(patchsize[1],ytess); //((patchsize[1] - 1) * ytess) + 1;
6082                         finalvertices = finalwidth * finalheight;
6083                         oldnumtriangles = finaltriangles = (finalwidth - 1) * (finalheight - 1) * 2;
6084                         type = Q3FACETYPE_MESH;
6085                         // generate geometry
6086                         // (note: normals are skipped because they get recalculated)
6087                         Q3PatchTesselateFloat(3, sizeof(float[3]), (loadmodel->surfmesh.data_vertex3f + 3 * out->num_firstvertex), patchsize[0], patchsize[1], sizeof(float[3]), originalvertex3f, xtess, ytess);
6088                         Q3PatchTesselateFloat(3, sizeof(float[3]), (loadmodel->surfmesh.data_normal3f + 3 * out->num_firstvertex), patchsize[0], patchsize[1], sizeof(float[3]), originalnormal3f, xtess, ytess);
6089                         Q3PatchTesselateFloat(2, sizeof(float[2]), (loadmodel->surfmesh.data_texcoordtexture2f + 2 * out->num_firstvertex), patchsize[0], patchsize[1], sizeof(float[2]), originaltexcoordtexture2f, xtess, ytess);
6090                         Q3PatchTesselateFloat(2, sizeof(float[2]), (loadmodel->surfmesh.data_texcoordlightmap2f + 2 * out->num_firstvertex), patchsize[0], patchsize[1], sizeof(float[2]), originaltexcoordlightmap2f, xtess, ytess);
6091                         Q3PatchTesselateFloat(4, sizeof(float[4]), (loadmodel->surfmesh.data_lightmapcolor4f + 4 * out->num_firstvertex), patchsize[0], patchsize[1], sizeof(float[4]), originalcolor4f, xtess, ytess);
6092                         Q3PatchTriangleElements((loadmodel->surfmesh.data_element3i + 3 * out->num_firsttriangle), finalwidth, finalheight, out->num_firstvertex);
6093
6094                         out->num_triangles = Mod_RemoveDegenerateTriangles(out->num_triangles, (loadmodel->surfmesh.data_element3i + 3 * out->num_firsttriangle), (loadmodel->surfmesh.data_element3i + 3 * out->num_firsttriangle), loadmodel->surfmesh.data_vertex3f);
6095
6096                         if (developer_extra.integer)
6097                         {
6098                                 if (out->num_triangles < finaltriangles)
6099                                         Con_DPrintf("Mod_Q3BSP_LoadFaces: %ix%i curve subdivided to %i vertices / %i triangles, %i degenerate triangles removed (leaving %i)\n", patchsize[0], patchsize[1], out->num_vertices, finaltriangles, finaltriangles - out->num_triangles, out->num_triangles);
6100                                 else
6101                                         Con_DPrintf("Mod_Q3BSP_LoadFaces: %ix%i curve subdivided to %i vertices / %i triangles\n", patchsize[0], patchsize[1], out->num_vertices, out->num_triangles);
6102                         }
6103                         // q3map does not put in collision brushes for curves... ugh
6104                         // build the lower quality collision geometry
6105                         finalwidth = Q3PatchDimForTess(patchsize[0],cxtess); //((patchsize[0] - 1) * cxtess) + 1;
6106                         finalheight = Q3PatchDimForTess(patchsize[1],cytess); //((patchsize[1] - 1) * cytess) + 1;
6107                         finalvertices = finalwidth * finalheight;
6108                         oldnumtriangles2 = finaltriangles = (finalwidth - 1) * (finalheight - 1) * 2;
6109
6110                         // legacy collision geometry implementation
6111                         out->deprecatedq3data_collisionvertex3f = (float *)Mem_Alloc(loadmodel->mempool, sizeof(float[3]) * finalvertices);
6112                         out->deprecatedq3data_collisionelement3i = (int *)Mem_Alloc(loadmodel->mempool, sizeof(int[3]) * finaltriangles);
6113                         out->num_collisionvertices = finalvertices;
6114                         out->num_collisiontriangles = finaltriangles;
6115                         Q3PatchTesselateFloat(3, sizeof(float[3]), out->deprecatedq3data_collisionvertex3f, patchsize[0], patchsize[1], sizeof(float[3]), originalvertex3f, cxtess, cytess);
6116                         Q3PatchTriangleElements(out->deprecatedq3data_collisionelement3i, finalwidth, finalheight, 0);
6117
6118                         //Mod_SnapVertices(3, out->num_vertices, (loadmodel->surfmesh.data_vertex3f + 3 * out->num_firstvertex), 0.25);
6119                         Mod_SnapVertices(3, finalvertices, out->deprecatedq3data_collisionvertex3f, 1);
6120
6121                         out->num_collisiontriangles = Mod_RemoveDegenerateTriangles(finaltriangles, out->deprecatedq3data_collisionelement3i, out->deprecatedq3data_collisionelement3i, out->deprecatedq3data_collisionvertex3f);
6122
6123                         // now optimize the collision mesh by finding triangle bboxes...
6124                         Mod_Q3BSP_BuildBBoxes(out->deprecatedq3data_collisionelement3i, out->num_collisiontriangles, out->deprecatedq3data_collisionvertex3f, &out->deprecatedq3data_collisionbbox6f, &out->deprecatedq3num_collisionbboxstride, mod_q3bsp_curves_collisions_stride.integer);
6125                         Mod_Q3BSP_BuildBBoxes(loadmodel->surfmesh.data_element3i + 3 * out->num_firsttriangle, out->num_triangles, loadmodel->surfmesh.data_vertex3f, &out->deprecatedq3data_bbox6f, &out->deprecatedq3num_bboxstride, mod_q3bsp_curves_stride.integer);
6126
6127                         // store collision geometry for BIH collision tree
6128                         surfacecollisionvertex3f = loadmodel->brush.data_collisionvertex3f + collisionvertices * 3;
6129                         surfacecollisionelement3i = loadmodel->brush.data_collisionelement3i + collisiontriangles * 3;
6130                         Q3PatchTesselateFloat(3, sizeof(float[3]), surfacecollisionvertex3f, patchsize[0], patchsize[1], sizeof(float[3]), originalvertex3f, cxtess, cytess);
6131                         Q3PatchTriangleElements(surfacecollisionelement3i, finalwidth, finalheight, collisionvertices);
6132                         Mod_SnapVertices(3, finalvertices, surfacecollisionvertex3f, 1);
6133 #if 1
6134                         // remove this once the legacy code is removed
6135                         {
6136                                 int nc = out->num_collisiontriangles;
6137 #endif
6138                         out->num_collisiontriangles = Mod_RemoveDegenerateTriangles(finaltriangles, surfacecollisionelement3i, surfacecollisionelement3i, loadmodel->brush.data_collisionvertex3f);
6139 #if 1
6140                                 if(nc != out->num_collisiontriangles)
6141                                 {
6142                                         Con_Printf("number of collision triangles differs between BIH and BSP. FAIL.\n");
6143                                 }
6144                         }
6145 #endif
6146
6147                         if (developer_extra.integer)
6148                                 Con_DPrintf("Mod_Q3BSP_LoadFaces: %ix%i curve became %i:%i vertices / %i:%i triangles (%i:%i degenerate)\n", patchsize[0], patchsize[1], out->num_vertices, out->num_collisionvertices, oldnumtriangles, oldnumtriangles2, oldnumtriangles - out->num_triangles, oldnumtriangles2 - out->num_collisiontriangles);
6149
6150                         collisionvertices += finalvertices;
6151                         collisiontriangles += out->num_collisiontriangles;
6152                         break;
6153                 default:
6154                         break;
6155                 }
6156                 meshvertices += out->num_vertices;
6157                 meshtriangles += out->num_triangles;
6158                 for (j = 0, invalidelements = 0;j < out->num_triangles * 3;j++)
6159                         if ((loadmodel->surfmesh.data_element3i + 3 * out->num_firsttriangle)[j] < out->num_firstvertex || (loadmodel->surfmesh.data_element3i + 3 * out->num_firsttriangle)[j] >= out->num_firstvertex + out->num_vertices)
6160                                 invalidelements++;
6161                 if (invalidelements)
6162                 {
6163                         Con_Printf("Mod_Q3BSP_LoadFaces: Warning: face #%i has %i invalid elements, type = %i, texture->name = \"%s\", texture->surfaceflags = %i, firstvertex = %i, numvertices = %i, firstelement = %i, numelements = %i, elements list:\n", i, invalidelements, type, out->texture->name, out->texture->surfaceflags, firstvertex, out->num_vertices, firstelement, out->num_triangles * 3);
6164                         for (j = 0;j < out->num_triangles * 3;j++)
6165                         {
6166                                 Con_Printf(" %i", (loadmodel->surfmesh.data_element3i + 3 * out->num_firsttriangle)[j] - out->num_firstvertex);
6167                                 if ((loadmodel->surfmesh.data_element3i + 3 * out->num_firsttriangle)[j] < out->num_firstvertex || (loadmodel->surfmesh.data_element3i + 3 * out->num_firsttriangle)[j] >= out->num_firstvertex + out->num_vertices)
6168                                         (loadmodel->surfmesh.data_element3i + 3 * out->num_firsttriangle)[j] = out->num_firstvertex;
6169                         }
6170                         Con_Print("\n");
6171                 }
6172                 // calculate a bounding box
6173                 VectorClear(out->mins);
6174                 VectorClear(out->maxs);
6175                 if (out->num_vertices)
6176                 {
6177                         if (cls.state != ca_dedicated && out->lightmaptexture)
6178                         {
6179                                 // figure out which part of the merged lightmap this fits into
6180                                 int lightmapindex = LittleLong(in->lightmapindex) >> (loadmodel->brushq3.deluxemapping ? 1 : 0);
6181                                 int mergewidth = R_TextureWidth(out->lightmaptexture) / loadmodel->brushq3.lightmapsize;
6182                                 int mergeheight = R_TextureHeight(out->lightmaptexture) / loadmodel->brushq3.lightmapsize;
6183                                 lightmapindex &= mergewidth * mergeheight - 1;
6184                                 lightmaptcscale[0] = 1.0f / mergewidth;
6185                                 lightmaptcscale[1] = 1.0f / mergeheight;
6186                                 lightmaptcbase[0] = (lightmapindex % mergewidth) * lightmaptcscale[0];
6187                                 lightmaptcbase[1] = (lightmapindex / mergewidth) * lightmaptcscale[1];
6188                                 // modify the lightmap texcoords to match this region of the merged lightmap
6189                                 for (j = 0, v = loadmodel->surfmesh.data_texcoordlightmap2f + 2 * out->num_firstvertex;j < out->num_vertices;j++, v += 2)
6190                                 {
6191                                         v[0] = v[0] * lightmaptcscale[0] + lightmaptcbase[0];
6192                                         v[1] = v[1] * lightmaptcscale[1] + lightmaptcbase[1];
6193                                 }
6194                         }
6195                         VectorCopy((loadmodel->surfmesh.data_vertex3f + 3 * out->num_firstvertex), out->mins);
6196                         VectorCopy((loadmodel->surfmesh.data_vertex3f + 3 * out->num_firstvertex), out->maxs);
6197                         for (j = 1, v = (loadmodel->surfmesh.data_vertex3f + 3 * out->num_firstvertex) + 3;j < out->num_vertices;j++, v += 3)
6198                         {
6199                                 out->mins[0] = min(out->mins[0], v[0]);
6200                                 out->maxs[0] = max(out->maxs[0], v[0]);
6201                                 out->mins[1] = min(out->mins[1], v[1]);
6202                                 out->maxs[1] = max(out->maxs[1], v[1]);
6203                                 out->mins[2] = min(out->mins[2], v[2]);
6204                                 out->maxs[2] = max(out->maxs[2], v[2]);
6205                         }
6206                         out->mins[0] -= 1.0f;
6207                         out->mins[1] -= 1.0f;
6208                         out->mins[2] -= 1.0f;
6209                         out->maxs[0] += 1.0f;
6210                         out->maxs[1] += 1.0f;
6211                         out->maxs[2] += 1.0f;
6212                 }
6213                 // set lightmap styles for consistency with q1bsp
6214                 //out->lightmapinfo->styles[0] = 0;
6215                 //out->lightmapinfo->styles[1] = 255;
6216                 //out->lightmapinfo->styles[2] = 255;
6217                 //out->lightmapinfo->styles[3] = 255;
6218         }
6219
6220         i = oldi;
6221         out = oldout;
6222         for (;i < count;i++, out++)
6223         {
6224                 if(out->num_vertices && out->num_triangles)
6225                         continue;
6226                 if(out->num_vertices == 0)
6227                 {
6228                         Con_Printf("Mod_Q3BSP_LoadFaces: surface %d (texture %s) has no vertices, ignoring\n", i, out->texture ? out->texture->name : "(none)");
6229                         if(out->num_triangles == 0)
6230                                 Con_Printf("Mod_Q3BSP_LoadFaces: surface %d (texture %s) has no triangles, ignoring\n", i, out->texture ? out->texture->name : "(none)");
6231                 }
6232                 else if(out->num_triangles == 0)
6233                         Con_Printf("Mod_Q3BSP_LoadFaces: surface %d (texture %s, near %f %f %f) has no triangles, ignoring\n", i, out->texture ? out->texture->name : "(none)",
6234                                         (loadmodel->surfmesh.data_vertex3f + 3 * out->num_firstvertex)[0 * 3 + 0],
6235                                         (loadmodel->surfmesh.data_vertex3f + 3 * out->num_firstvertex)[1 * 3 + 0],
6236                                         (loadmodel->surfmesh.data_vertex3f + 3 * out->num_firstvertex)[2 * 3 + 0]);
6237         }
6238
6239         // for per pixel lighting
6240         Mod_BuildTextureVectorsFromNormals(0, loadmodel->surfmesh.num_vertices, loadmodel->surfmesh.num_triangles, loadmodel->surfmesh.data_vertex3f, loadmodel->surfmesh.data_texcoordtexture2f, loadmodel->surfmesh.data_normal3f, loadmodel->surfmesh.data_element3i, loadmodel->surfmesh.data_svector3f, loadmodel->surfmesh.data_tvector3f, r_smoothnormals_areaweighting.integer != 0);
6241
6242         // generate ushort elements array if possible
6243         if (loadmodel->surfmesh.data_element3s)
6244                 for (i = 0;i < loadmodel->surfmesh.num_triangles*3;i++)
6245                         loadmodel->surfmesh.data_element3s[i] = loadmodel->surfmesh.data_element3i[i];
6246
6247         // free the no longer needed vertex data
6248         loadmodel->brushq3.num_vertices = 0;
6249         if (loadmodel->brushq3.data_vertex3f)
6250                 Mem_Free(loadmodel->brushq3.data_vertex3f);
6251         loadmodel->brushq3.data_vertex3f = NULL;
6252         loadmodel->brushq3.data_normal3f = NULL;
6253         loadmodel->brushq3.data_texcoordtexture2f = NULL;
6254         loadmodel->brushq3.data_texcoordlightmap2f = NULL;
6255         loadmodel->brushq3.data_color4f = NULL;
6256         // free the no longer needed triangle data
6257         loadmodel->brushq3.num_triangles = 0;
6258         if (loadmodel->brushq3.data_element3i)
6259                 Mem_Free(loadmodel->brushq3.data_element3i);
6260         loadmodel->brushq3.data_element3i = NULL;
6261
6262         if(patchtess)
6263                 Mem_Free(patchtess);
6264 }
6265
6266 static void Mod_Q3BSP_LoadModels(lump_t *l)
6267 {
6268         q3dmodel_t *in;
6269         q3dmodel_t *out;
6270         int i, j, n, c, count;
6271
6272         in = (q3dmodel_t *)(mod_base + l->fileofs);
6273         if (l->filelen % sizeof(*in))
6274                 Host_Error("Mod_Q3BSP_LoadModels: funny lump size in %s",loadmodel->name);
6275         count = l->filelen / sizeof(*in);
6276         out = (q3dmodel_t *)Mem_Alloc(loadmodel->mempool, count * sizeof(*out));
6277
6278         loadmodel->brushq3.data_models = out;
6279         loadmodel->brushq3.num_models = count;
6280
6281         for (i = 0;i < count;i++, in++, out++)
6282         {
6283                 for (j = 0;j < 3;j++)
6284                 {
6285                         out->mins[j] = LittleFloat(in->mins[j]);
6286                         out->maxs[j] = LittleFloat(in->maxs[j]);
6287                 }
6288                 n = LittleLong(in->firstface);
6289                 c = LittleLong(in->numfaces);
6290                 if (n < 0 || n + c > loadmodel->num_surfaces)
6291                         Host_Error("Mod_Q3BSP_LoadModels: invalid face range %i : %i (%i faces)", n, n + c, loadmodel->num_surfaces);
6292                 out->firstface = n;
6293                 out->numfaces = c;
6294                 n = LittleLong(in->firstbrush);
6295                 c = LittleLong(in->numbrushes);
6296                 if (n < 0 || n + c > loadmodel->brush.num_brushes)
6297                         Host_Error("Mod_Q3BSP_LoadModels: invalid brush range %i : %i (%i brushes)", n, n + c, loadmodel->brush.num_brushes);
6298                 out->firstbrush = n;
6299                 out->numbrushes = c;
6300         }
6301 }
6302
6303 static void Mod_Q3BSP_LoadLeafBrushes(lump_t *l)
6304 {
6305         int *in;
6306         int *out;
6307         int i, n, count;
6308
6309         in = (int *)(mod_base + l->fileofs);
6310         if (l->filelen % sizeof(*in))
6311                 Host_Error("Mod_Q3BSP_LoadLeafBrushes: funny lump size in %s",loadmodel->name);
6312         count = l->filelen / sizeof(*in);
6313         out = (int *)Mem_Alloc(loadmodel->mempool, count * sizeof(*out));
6314
6315         loadmodel->brush.data_leafbrushes = out;
6316         loadmodel->brush.num_leafbrushes = count;
6317
6318         for (i = 0;i < count;i++, in++, out++)
6319         {
6320                 n = LittleLong(*in);
6321                 if (n < 0 || n >= loadmodel->brush.num_brushes)
6322                         Host_Error("Mod_Q3BSP_LoadLeafBrushes: invalid brush index %i (%i brushes)", n, loadmodel->brush.num_brushes);
6323                 *out = n;
6324         }
6325 }
6326
6327 static void Mod_Q3BSP_LoadLeafFaces(lump_t *l)
6328 {
6329         int *in;
6330         int *out;
6331         int i, n, count;
6332
6333         in = (int *)(mod_base + l->fileofs);
6334         if (l->filelen % sizeof(*in))
6335                 Host_Error("Mod_Q3BSP_LoadLeafFaces: funny lump size in %s",loadmodel->name);
6336         count = l->filelen / sizeof(*in);
6337         out = (int *)Mem_Alloc(loadmodel->mempool, count * sizeof(*out));
6338
6339         loadmodel->brush.data_leafsurfaces = out;
6340         loadmodel->brush.num_leafsurfaces = count;
6341
6342         for (i = 0;i < count;i++, in++, out++)
6343         {
6344                 n = LittleLong(*in);
6345                 if (n < 0 || n >= loadmodel->num_surfaces)
6346                         Host_Error("Mod_Q3BSP_LoadLeafFaces: invalid face index %i (%i faces)", n, loadmodel->num_surfaces);
6347                 *out = n;
6348         }
6349 }
6350
6351 static void Mod_Q3BSP_LoadLeafs(lump_t *l)
6352 {
6353         q3dleaf_t *in;
6354         mleaf_t *out;
6355         int i, j, n, c, count;
6356
6357         in = (q3dleaf_t *)(mod_base + l->fileofs);
6358         if (l->filelen % sizeof(*in))
6359                 Host_Error("Mod_Q3BSP_LoadLeafs: funny lump size in %s",loadmodel->name);
6360         count = l->filelen / sizeof(*in);
6361         out = (mleaf_t *)Mem_Alloc(loadmodel->mempool, count * sizeof(*out));
6362
6363         loadmodel->brush.data_leafs = out;
6364         loadmodel->brush.num_leafs = count;
6365
6366         for (i = 0;i < count;i++, in++, out++)
6367         {
6368                 out->parent = NULL;
6369                 out->plane = NULL;
6370                 out->clusterindex = LittleLong(in->clusterindex);
6371                 out->areaindex = LittleLong(in->areaindex);
6372                 for (j = 0;j < 3;j++)
6373                 {
6374                         // yes the mins/maxs are ints
6375                         out->mins[j] = LittleLong(in->mins[j]) - 1;
6376                         out->maxs[j] = LittleLong(in->maxs[j]) + 1;
6377                 }
6378                 n = LittleLong(in->firstleafface);
6379                 c = LittleLong(in->numleaffaces);
6380                 if (n < 0 || n + c > loadmodel->brush.num_leafsurfaces)
6381                         Host_Error("Mod_Q3BSP_LoadLeafs: invalid leafsurface range %i : %i (%i leafsurfaces)", n, n + c, loadmodel->brush.num_leafsurfaces);
6382                 out->firstleafsurface = loadmodel->brush.data_leafsurfaces + n;
6383                 out->numleafsurfaces = c;
6384                 n = LittleLong(in->firstleafbrush);
6385                 c = LittleLong(in->numleafbrushes);
6386                 if (n < 0 || n + c > loadmodel->brush.num_leafbrushes)
6387                         Host_Error("Mod_Q3BSP_LoadLeafs: invalid leafbrush range %i : %i (%i leafbrushes)", n, n + c, loadmodel->brush.num_leafbrushes);
6388                 out->firstleafbrush = loadmodel->brush.data_leafbrushes + n;
6389                 out->numleafbrushes = c;
6390         }
6391 }
6392
6393 static void Mod_Q3BSP_LoadNodes(lump_t *l)
6394 {
6395         q3dnode_t *in;
6396         mnode_t *out;
6397         int i, j, n, count;
6398
6399         in = (q3dnode_t *)(mod_base + l->fileofs);
6400         if (l->filelen % sizeof(*in))
6401                 Host_Error("Mod_Q3BSP_LoadNodes: funny lump size in %s",loadmodel->name);
6402         count = l->filelen / sizeof(*in);
6403         if (count == 0)
6404                 Host_Error("Mod_Q3BSP_LoadNodes: missing BSP tree in %s",loadmodel->name);
6405         out = (mnode_t *)Mem_Alloc(loadmodel->mempool, count * sizeof(*out));
6406
6407         loadmodel->brush.data_nodes = out;
6408         loadmodel->brush.num_nodes = count;
6409
6410         for (i = 0;i < count;i++, in++, out++)
6411         {
6412                 out->parent = NULL;
6413                 n = LittleLong(in->planeindex);
6414                 if (n < 0 || n >= loadmodel->brush.num_planes)
6415                         Host_Error("Mod_Q3BSP_LoadNodes: invalid planeindex %i (%i planes)", n, loadmodel->brush.num_planes);
6416                 out->plane = loadmodel->brush.data_planes + n;
6417                 for (j = 0;j < 2;j++)
6418                 {
6419                         n = LittleLong(in->childrenindex[j]);
6420                         if (n >= 0)
6421                         {
6422                                 if (n >= loadmodel->brush.num_nodes)
6423                                         Host_Error("Mod_Q3BSP_LoadNodes: invalid child node index %i (%i nodes)", n, loadmodel->brush.num_nodes);
6424                                 out->children[j] = loadmodel->brush.data_nodes + n;
6425                         }
6426                         else
6427                         {
6428                                 n = -1 - n;
6429                                 if (n >= loadmodel->brush.num_leafs)
6430                                         Host_Error("Mod_Q3BSP_LoadNodes: invalid child leaf index %i (%i leafs)", n, loadmodel->brush.num_leafs);
6431                                 out->children[j] = (mnode_t *)(loadmodel->brush.data_leafs + n);
6432                         }
6433                 }
6434                 for (j = 0;j < 3;j++)
6435                 {
6436                         // yes the mins/maxs are ints
6437                         out->mins[j] = LittleLong(in->mins[j]) - 1;
6438                         out->maxs[j] = LittleLong(in->maxs[j]) + 1;
6439                 }
6440         }
6441
6442         // set the parent pointers
6443         Mod_Q1BSP_LoadNodes_RecursiveSetParent(loadmodel->brush.data_nodes, NULL);
6444 }
6445
6446 static void Mod_Q3BSP_LoadLightGrid(lump_t *l)
6447 {
6448         q3dlightgrid_t *in;
6449         q3dlightgrid_t *out;
6450         int count;
6451         int i;
6452
6453         in = (q3dlightgrid_t *)(mod_base + l->fileofs);
6454         if (l->filelen % sizeof(*in))
6455                 Host_Error("Mod_Q3BSP_LoadLightGrid: funny lump size in %s",loadmodel->name);
6456         loadmodel->brushq3.num_lightgrid_scale[0] = 1.0f / loadmodel->brushq3.num_lightgrid_cellsize[0];
6457         loadmodel->brushq3.num_lightgrid_scale[1] = 1.0f / loadmodel->brushq3.num_lightgrid_cellsize[1];
6458         loadmodel->brushq3.num_lightgrid_scale[2] = 1.0f / loadmodel->brushq3.num_lightgrid_cellsize[2];
6459         loadmodel->brushq3.num_lightgrid_imins[0] = (int)ceil(loadmodel->brushq3.data_models->mins[0] * loadmodel->brushq3.num_lightgrid_scale[0]);
6460         loadmodel->brushq3.num_lightgrid_imins[1] = (int)ceil(loadmodel->brushq3.data_models->mins[1] * loadmodel->brushq3.num_lightgrid_scale[1]);
6461         loadmodel->brushq3.num_lightgrid_imins[2] = (int)ceil(loadmodel->brushq3.data_models->mins[2] * loadmodel->brushq3.num_lightgrid_scale[2]);
6462         loadmodel->brushq3.num_lightgrid_imaxs[0] = (int)floor(loadmodel->brushq3.data_models->maxs[0] * loadmodel->brushq3.num_lightgrid_scale[0]);
6463         loadmodel->brushq3.num_lightgrid_imaxs[1] = (int)floor(loadmodel->brushq3.data_models->maxs[1] * loadmodel->brushq3.num_lightgrid_scale[1]);
6464         loadmodel->brushq3.num_lightgrid_imaxs[2] = (int)floor(loadmodel->brushq3.data_models->maxs[2] * loadmodel->brushq3.num_lightgrid_scale[2]);
6465         loadmodel->brushq3.num_lightgrid_isize[0] = loadmodel->brushq3.num_lightgrid_imaxs[0] - loadmodel->brushq3.num_lightgrid_imins[0] + 1;
6466         loadmodel->brushq3.num_lightgrid_isize[1] = loadmodel->brushq3.num_lightgrid_imaxs[1] - loadmodel->brushq3.num_lightgrid_imins[1] + 1;
6467         loadmodel->brushq3.num_lightgrid_isize[2] = loadmodel->brushq3.num_lightgrid_imaxs[2] - loadmodel->brushq3.num_lightgrid_imins[2] + 1;
6468         count = loadmodel->brushq3.num_lightgrid_isize[0] * loadmodel->brushq3.num_lightgrid_isize[1] * loadmodel->brushq3.num_lightgrid_isize[2];
6469         Matrix4x4_CreateScale3(&loadmodel->brushq3.num_lightgrid_indexfromworld, loadmodel->brushq3.num_lightgrid_scale[0], loadmodel->brushq3.num_lightgrid_scale[1], loadmodel->brushq3.num_lightgrid_scale[2]);
6470         Matrix4x4_ConcatTranslate(&loadmodel->brushq3.num_lightgrid_indexfromworld, -loadmodel->brushq3.num_lightgrid_imins[0] * loadmodel->brushq3.num_lightgrid_cellsize[0], -loadmodel->brushq3.num_lightgrid_imins[1] * loadmodel->brushq3.num_lightgrid_cellsize[1], -loadmodel->brushq3.num_lightgrid_imins[2] * loadmodel->brushq3.num_lightgrid_cellsize[2]);
6471
6472         // if lump is empty there is nothing to load, we can deal with that in the LightPoint code
6473         if (l->filelen)
6474         {
6475                 if (l->filelen < count * (int)sizeof(*in))
6476                 {
6477                         Con_Printf("Mod_Q3BSP_LoadLightGrid: invalid lightgrid lump size %i bytes, should be %i bytes (%ix%ix%i)", l->filelen, (int)(count * sizeof(*in)), loadmodel->brushq3.num_lightgrid_isize[0], loadmodel->brushq3.num_lightgrid_isize[1], loadmodel->brushq3.num_lightgrid_isize[2]);
6478                         return; // ignore the grid if we cannot understand it
6479                 }
6480                 if (l->filelen != count * (int)sizeof(*in))
6481                         Con_Printf("Mod_Q3BSP_LoadLightGrid: Warning: calculated lightgrid size %i bytes does not match lump size %i\n", (int)(count * sizeof(*in)), l->filelen);
6482                 out = (q3dlightgrid_t *)Mem_Alloc(loadmodel->mempool, count * sizeof(*out));
6483                 loadmodel->brushq3.data_lightgrid = out;
6484                 loadmodel->brushq3.num_lightgrid = count;
6485                 // no swapping or validation necessary
6486                 memcpy(out, in, count * (int)sizeof(*out));
6487
6488                 if(mod_q3bsp_sRGBlightmaps.integer)
6489                 {
6490                         if(vid_sRGB.integer && vid_sRGB_fallback.integer && !vid.sRGB3D)
6491                         {
6492                                 // we fix the brightness consistently via lightmapscale
6493                         }
6494                         else
6495                         {
6496                                 for(i = 0; i < count; ++i)
6497                                 {
6498                                         out[i].ambientrgb[0] = floor(Image_LinearFloatFromsRGB(out[i].ambientrgb[0]) * 255.0f + 0.5f);
6499                                         out[i].ambientrgb[1] = floor(Image_LinearFloatFromsRGB(out[i].ambientrgb[1]) * 255.0f + 0.5f);
6500                                         out[i].ambientrgb[2] = floor(Image_LinearFloatFromsRGB(out[i].ambientrgb[2]) * 255.0f + 0.5f);
6501                                         out[i].diffusergb[0] = floor(Image_LinearFloatFromsRGB(out[i].diffusergb[0]) * 255.0f + 0.5f);
6502                                         out[i].diffusergb[1] = floor(Image_LinearFloatFromsRGB(out[i].diffusergb[1]) * 255.0f + 0.5f);
6503                                         out[i].diffusergb[2] = floor(Image_LinearFloatFromsRGB(out[i].diffusergb[2]) * 255.0f + 0.5f);
6504                                 }
6505                         }
6506                 }
6507                 else
6508                 {
6509                         if(vid_sRGB.integer && vid_sRGB_fallback.integer && !vid.sRGB3D)
6510                         {
6511                                 for(i = 0; i < count; ++i)
6512                                 {
6513                                         out[i].ambientrgb[0] = floor(Image_sRGBFloatFromLinear_Lightmap(out[i].ambientrgb[0]) * 255.0f + 0.5f);
6514                                         out[i].ambientrgb[1] = floor(Image_sRGBFloatFromLinear_Lightmap(out[i].ambientrgb[1]) * 255.0f + 0.5f);
6515                                         out[i].ambientrgb[2] = floor(Image_sRGBFloatFromLinear_Lightmap(out[i].ambientrgb[2]) * 255.0f + 0.5f);
6516                                         out[i].diffusergb[0] = floor(Image_sRGBFloatFromLinear_Lightmap(out[i].diffusergb[0]) * 255.0f + 0.5f);
6517                                         out[i].diffusergb[1] = floor(Image_sRGBFloatFromLinear_Lightmap(out[i].diffusergb[1]) * 255.0f + 0.5f);
6518                                         out[i].diffusergb[2] = floor(Image_sRGBFloatFromLinear_Lightmap(out[i].diffusergb[2]) * 255.0f + 0.5f);
6519                                 }
6520                         }
6521                         else
6522                         {
6523                                 // all is good
6524                         }
6525                 }
6526         }
6527 }
6528
6529 static void Mod_Q3BSP_LoadPVS(lump_t *l)
6530 {
6531         q3dpvs_t *in;
6532         int totalchains;
6533
6534         if (l->filelen == 0)
6535         {
6536                 int i;
6537                 // unvised maps often have cluster indices even without pvs, so check
6538                 // leafs to find real number of clusters
6539                 loadmodel->brush.num_pvsclusters = 1;
6540                 for (i = 0;i < loadmodel->brush.num_leafs;i++)
6541                         loadmodel->brush.num_pvsclusters = max(loadmodel->brush.num_pvsclusters, loadmodel->brush.data_leafs[i].clusterindex + 1);
6542
6543                 // create clusters
6544                 loadmodel->brush.num_pvsclusterbytes = (loadmodel->brush.num_pvsclusters + 7) / 8;
6545                 totalchains = loadmodel->brush.num_pvsclusterbytes * loadmodel->brush.num_pvsclusters;
6546                 loadmodel->brush.data_pvsclusters = (unsigned char *)Mem_Alloc(loadmodel->mempool, totalchains);
6547                 memset(loadmodel->brush.data_pvsclusters, 0xFF, totalchains);
6548                 return;
6549         }
6550
6551         in = (q3dpvs_t *)(mod_base + l->fileofs);
6552         if (l->filelen < 9)
6553                 Host_Error("Mod_Q3BSP_LoadPVS: funny lump size in %s",loadmodel->name);
6554
6555         loadmodel->brush.num_pvsclusters = LittleLong(in->numclusters);
6556         loadmodel->brush.num_pvsclusterbytes = LittleLong(in->chainlength);
6557         if (loadmodel->brush.num_pvsclusterbytes < ((loadmodel->brush.num_pvsclusters + 7) / 8))
6558                 Host_Error("Mod_Q3BSP_LoadPVS: (chainlength = %i) < ((numclusters = %i) + 7) / 8", loadmodel->brush.num_pvsclusterbytes, loadmodel->brush.num_pvsclusters);
6559         totalchains = loadmodel->brush.num_pvsclusterbytes * loadmodel->brush.num_pvsclusters;
6560         if (l->filelen < totalchains + (int)sizeof(*in))
6561                 Host_Error("Mod_Q3BSP_LoadPVS: lump too small ((numclusters = %i) * (chainlength = %i) + sizeof(q3dpvs_t) == %i bytes, lump is %i bytes)", loadmodel->brush.num_pvsclusters, loadmodel->brush.num_pvsclusterbytes, (int)(totalchains + sizeof(*in)), l->filelen);
6562
6563         loadmodel->brush.data_pvsclusters = (unsigned char *)Mem_Alloc(loadmodel->mempool, totalchains);
6564         memcpy(loadmodel->brush.data_pvsclusters, (unsigned char *)(in + 1), totalchains);
6565 }
6566
6567 static void Mod_Q3BSP_LightPoint(dp_model_t *model, const vec3_t p, vec3_t ambientcolor, vec3_t diffusecolor, vec3_t diffusenormal)
6568 {
6569         int i, j, k, index[3];
6570         float transformed[3], blend1, blend2, blend, stylescale = 1;
6571         q3dlightgrid_t *a, *s;
6572
6573         // scale lighting by lightstyle[0] so that darkmode in dpmod works properly
6574         switch(vid.renderpath)
6575         {
6576         case RENDERPATH_GL20:
6577         case RENDERPATH_D3D9:
6578         case RENDERPATH_D3D10:
6579         case RENDERPATH_D3D11:
6580         case RENDERPATH_SOFT:
6581         case RENDERPATH_GLES2:
6582                 // LordHavoc: FIXME: is this true?
6583                 stylescale = 1; // added while render
6584                 break;
6585         case RENDERPATH_GL11:
6586         case RENDERPATH_GL13:
6587         case RENDERPATH_GLES1:
6588                 stylescale = r_refdef.scene.rtlightstylevalue[0];
6589                 break;
6590         }
6591
6592         if (!model->brushq3.num_lightgrid)
6593         {
6594                 ambientcolor[0] = stylescale;
6595                 ambientcolor[1] = stylescale;
6596                 ambientcolor[2] = stylescale;
6597                 return;
6598         }
6599
6600         Matrix4x4_Transform(&model->brushq3.num_lightgrid_indexfromworld, p, transformed);
6601         //Matrix4x4_Print(&model->brushq3.num_lightgrid_indexfromworld);
6602         //Con_Printf("%f %f %f transformed %f %f %f clamped ", p[0], p[1], p[2], transformed[0], transformed[1], transformed[2]);
6603         transformed[0] = bound(0, transformed[0], model->brushq3.num_lightgrid_isize[0] - 1);
6604         transformed[1] = bound(0, transformed[1], model->brushq3.num_lightgrid_isize[1] - 1);
6605         transformed[2] = bound(0, transformed[2], model->brushq3.num_lightgrid_isize[2] - 1);
6606         index[0] = (int)floor(transformed[0]);
6607         index[1] = (int)floor(transformed[1]);
6608         index[2] = (int)floor(transformed[2]);
6609         //Con_Printf("%f %f %f index %i %i %i:\n", transformed[0], transformed[1], transformed[2], index[0], index[1], index[2]);
6610
6611         // now lerp the values
6612         VectorClear(diffusenormal);
6613         a = &model->brushq3.data_lightgrid[(index[2] * model->brushq3.num_lightgrid_isize[1] + index[1]) * model->brushq3.num_lightgrid_isize[0] + index[0]];
6614         for (k = 0;k < 2;k++)
6615         {
6616                 blend1 = (k ? (transformed[2] - index[2]) : (1 - (transformed[2] - index[2])));
6617                 if (blend1 < 0.001f || index[2] + k >= model->brushq3.num_lightgrid_isize[2])
6618                         continue;
6619                 for (j = 0;j < 2;j++)
6620                 {
6621                         blend2 = blend1 * (j ? (transformed[1] - index[1]) : (1 - (transformed[1] - index[1])));
6622                         if (blend2 < 0.001f || index[1] + j >= model->brushq3.num_lightgrid_isize[1])
6623                                 continue;
6624                         for (i = 0;i < 2;i++)
6625                         {
6626                                 blend = blend2 * (i ? (transformed[0] - index[0]) : (1 - (transformed[0] - index[0]))) * stylescale;
6627                                 if (blend < 0.001f || index[0] + i >= model->brushq3.num_lightgrid_isize[0])
6628                                         continue;
6629                                 s = a + (k * model->brushq3.num_lightgrid_isize[1] + j) * model->brushq3.num_lightgrid_isize[0] + i;
6630                                 VectorMA(ambientcolor, blend * (1.0f / 128.0f), s->ambientrgb, ambientcolor);
6631                                 VectorMA(diffusecolor, blend * (1.0f / 128.0f), s->diffusergb, diffusecolor);
6632                                 // this uses the mod_md3_sin table because the values are
6633                                 // already in the 0-255 range, the 64+ bias fetches a cosine
6634                                 // instead of a sine value
6635                                 diffusenormal[0] += blend * (mod_md3_sin[64 + s->diffuseyaw] * mod_md3_sin[s->diffusepitch]);
6636                                 diffusenormal[1] += blend * (mod_md3_sin[     s->diffuseyaw] * mod_md3_sin[s->diffusepitch]);
6637                                 diffusenormal[2] += blend * (mod_md3_sin[64 + s->diffusepitch]);
6638                                 //Con_Printf("blend %f: ambient %i %i %i, diffuse %i %i %i, diffusepitch %i diffuseyaw %i (%f %f, normal %f %f %f)\n", blend, s->ambientrgb[0], s->ambientrgb[1], s->ambientrgb[2], s->diffusergb[0], s->diffusergb[1], s->diffusergb[2], s->diffusepitch, s->diffuseyaw, pitch, yaw, (cos(yaw) * cospitch), (sin(yaw) * cospitch), (-sin(pitch)));
6639                         }
6640                 }
6641         }
6642
6643         // normalize the light direction before turning
6644         VectorNormalize(diffusenormal);
6645         //Con_Printf("result: ambient %f %f %f diffuse %f %f %f diffusenormal %f %f %f\n", ambientcolor[0], ambientcolor[1], ambientcolor[2], diffusecolor[0], diffusecolor[1], diffusecolor[2], diffusenormal[0], diffusenormal[1], diffusenormal[2]);
6646 }
6647
6648 static int Mod_Q3BSP_TraceLineOfSight_RecursiveNodeCheck(mnode_t *node, double p1[3], double p2[3])
6649 {
6650         double t1, t2;
6651         double midf, mid[3];
6652         int ret, side;
6653
6654         // check for empty
6655         while (node->plane)
6656         {
6657                 // find the point distances
6658                 mplane_t *plane = node->plane;
6659                 if (plane->type < 3)
6660                 {
6661                         t1 = p1[plane->type] - plane->dist;
6662                         t2 = p2[plane->type] - plane->dist;
6663                 }
6664                 else
6665                 {
6666                         t1 = DotProduct (plane->normal, p1) - plane->dist;
6667                         t2 = DotProduct (plane->normal, p2) - plane->dist;
6668                 }
6669
6670                 if (t1 < 0)
6671                 {
6672                         if (t2 < 0)
6673                         {
6674                                 node = node->children[1];
6675                                 continue;
6676                         }
6677                         side = 1;
6678                 }
6679                 else
6680                 {
6681                         if (t2 >= 0)
6682                         {
6683                                 node = node->children[0];
6684                                 continue;
6685                         }
6686                         side = 0;
6687                 }
6688
6689                 midf = t1 / (t1 - t2);
6690                 VectorLerp(p1, midf, p2, mid);
6691
6692                 // recurse both sides, front side first
6693                 // return 2 if empty is followed by solid (hit something)
6694                 // do not return 2 if both are solid or both empty,
6695                 // or if start is solid and end is empty
6696                 // as these degenerate cases usually indicate the eye is in solid and
6697                 // should see the target point anyway
6698                 ret = Mod_Q3BSP_TraceLineOfSight_RecursiveNodeCheck(node->children[side    ], p1, mid);
6699                 if (ret != 0)
6700                         return ret;
6701                 ret = Mod_Q3BSP_TraceLineOfSight_RecursiveNodeCheck(node->children[side ^ 1], mid, p2);
6702                 if (ret != 1)
6703                         return ret;
6704                 return 2;
6705         }
6706         return ((mleaf_t *)node)->clusterindex < 0;
6707 }
6708
6709 static qboolean Mod_Q3BSP_TraceLineOfSight(struct model_s *model, const vec3_t start, const vec3_t end)
6710 {
6711         if (model->brush.submodel || mod_q3bsp_tracelineofsight_brushes.integer)
6712         {
6713                 trace_t trace;
6714                 model->TraceLine(model, NULL, NULL, &trace, start, end, SUPERCONTENTS_VISBLOCKERMASK);
6715                 return trace.fraction == 1;
6716         }
6717         else
6718         {
6719                 double tracestart[3], traceend[3];
6720                 VectorCopy(start, tracestart);
6721                 VectorCopy(end, traceend);
6722                 return !Mod_Q3BSP_TraceLineOfSight_RecursiveNodeCheck(model->brush.data_nodes, tracestart, traceend);
6723         }
6724 }
6725
6726 void Mod_CollisionBIH_TracePoint(dp_model_t *model, const frameblend_t *frameblend, const skeleton_t *skeleton, trace_t *trace, const vec3_t start, int hitsupercontentsmask)
6727 {
6728         const bih_t *bih;
6729         const bih_leaf_t *leaf;
6730         const bih_node_t *node;
6731         const colbrushf_t *brush;
6732         int axis;
6733         int nodenum;
6734         int nodestackpos = 0;
6735         int nodestack[1024];
6736
6737         memset(trace, 0, sizeof(*trace));
6738         trace->fraction = 1;
6739         trace->hitsupercontentsmask = hitsupercontentsmask;
6740
6741         bih = &model->collision_bih;
6742         if(!bih->nodes)
6743                 return;
6744
6745         nodenum = bih->rootnode;
6746         nodestack[nodestackpos++] = nodenum;
6747         while (nodestackpos)
6748         {
6749                 nodenum = nodestack[--nodestackpos];
6750                 node = bih->nodes + nodenum;
6751 #if 1
6752                 if (!BoxesOverlap(start, start, node->mins, node->maxs))
6753                         continue;
6754 #endif
6755                 if (node->type <= BIH_SPLITZ && nodestackpos+2 <= 1024)
6756                 {
6757                         axis = node->type - BIH_SPLITX;
6758                         if (start[axis] >= node->frontmin)
6759                                 nodestack[nodestackpos++] = node->front;
6760                         if (start[axis] <= node->backmax)
6761                                 nodestack[nodestackpos++] = node->back;
6762                 }
6763                 else if (node->type == BIH_UNORDERED)
6764                 {
6765                         for (axis = 0;axis < BIH_MAXUNORDEREDCHILDREN && node->children[axis] >= 0;axis++)
6766                         {
6767                                 leaf = bih->leafs + node->children[axis];
6768 #if 1
6769                                 if (!BoxesOverlap(start, start, leaf->mins, leaf->maxs))
6770                                         continue;
6771 #endif
6772                                 switch(leaf->type)
6773                                 {
6774                                 case BIH_BRUSH:
6775                                         brush = model->brush.data_brushes[leaf->itemindex].colbrushf;
6776                                         Collision_TracePointBrushFloat(trace, start, brush);
6777                                         break;
6778                                 case BIH_COLLISIONTRIANGLE:
6779                                         // collision triangle - skipped because they have no volume
6780                                         break;
6781                                 case BIH_RENDERTRIANGLE:
6782                                         // render triangle - skipped because they have no volume
6783                                         break;
6784                                 }
6785                         }
6786                 }
6787         }
6788 }
6789
6790 static void Mod_CollisionBIH_TraceLineShared(dp_model_t *model, const frameblend_t *frameblend, const skeleton_t *skeleton, trace_t *trace, const vec3_t start, const vec3_t end, int hitsupercontentsmask, const bih_t *bih)
6791 {
6792         const bih_leaf_t *leaf;
6793         const bih_node_t *node;
6794         const colbrushf_t *brush;
6795         const int *e;
6796         const texture_t *texture;
6797         vec3_t nodebigmins, nodebigmaxs, nodestart, nodeend, sweepnodemins, sweepnodemaxs;
6798         vec_t d1, d2, d3, d4, f, nodestackline[1024][6];
6799         int axis, nodenum, nodestackpos = 0, nodestack[1024];
6800
6801         if(!bih->nodes)
6802                 return;
6803
6804         if (VectorCompare(start, end))
6805         {
6806                 Mod_CollisionBIH_TracePoint(model, frameblend, skeleton, trace, start, hitsupercontentsmask);
6807                 return;
6808         }
6809
6810         nodenum = bih->rootnode;
6811
6812         memset(trace, 0, sizeof(*trace));
6813         trace->fraction = 1;
6814         trace->hitsupercontentsmask = hitsupercontentsmask;
6815
6816         // push first node
6817         nodestackline[nodestackpos][0] = start[0];
6818         nodestackline[nodestackpos][1] = start[1];
6819         nodestackline[nodestackpos][2] = start[2];
6820         nodestackline[nodestackpos][3] = end[0];
6821         nodestackline[nodestackpos][4] = end[1];
6822         nodestackline[nodestackpos][5] = end[2];
6823         nodestack[nodestackpos++] = nodenum;
6824         while (nodestackpos)
6825         {
6826                 nodenum = nodestack[--nodestackpos];
6827                 node = bih->nodes + nodenum;
6828                 VectorCopy(nodestackline[nodestackpos], nodestart);
6829                 VectorCopy(nodestackline[nodestackpos] + 3, nodeend);
6830                 sweepnodemins[0] = min(nodestart[0], nodeend[0]) - 1;
6831                 sweepnodemins[1] = min(nodestart[1], nodeend[1]) - 1;
6832                 sweepnodemins[2] = min(nodestart[2], nodeend[2]) - 1;
6833                 sweepnodemaxs[0] = max(nodestart[0], nodeend[0]) + 1;
6834                 sweepnodemaxs[1] = max(nodestart[1], nodeend[1]) + 1;
6835                 sweepnodemaxs[2] = max(nodestart[2], nodeend[2]) + 1;
6836                 if (!BoxesOverlap(sweepnodemins, sweepnodemaxs, node->mins, node->maxs))
6837                         continue;
6838                 if (node->type <= BIH_SPLITZ && nodestackpos+2 <= 1024)
6839                 {
6840                         // recurse children of the split
6841                         axis = node->type - BIH_SPLITX;
6842                         d1 = node->backmax - nodestart[axis];
6843                         d2 = node->backmax - nodeend[axis];
6844                         d3 = nodestart[axis] - node->frontmin;
6845                         d4 = nodeend[axis] - node->frontmin;
6846                         switch((d1 < 0) | ((d2 < 0) << 1) | ((d3 < 0) << 2) | ((d4 < 0) << 3))
6847                         {
6848                         case  0: /* >>>> */                     VectorCopy(nodestart,             nodestackline[nodestackpos]); VectorCopy(              nodeend, nodestackline[nodestackpos] + 3); nodestack[nodestackpos++] = node->back;                      VectorCopy(nodestart,             nodestackline[nodestackpos]); VectorCopy(              nodeend, nodestackline[nodestackpos] + 3); nodestack[nodestackpos++] = node->front; break;
6849                         case  1: /* <>>> */ f = d1 / (d1 - d2); VectorLerp(nodestart, f, nodeend, nodestackline[nodestackpos]); VectorCopy(              nodeend, nodestackline[nodestackpos] + 3); nodestack[nodestackpos++] = node->back;                      VectorCopy(nodestart,             nodestackline[nodestackpos]); VectorCopy(              nodeend, nodestackline[nodestackpos] + 3); nodestack[nodestackpos++] = node->front; break;
6850                         case  2: /* ><>> */ f = d1 / (d1 - d2); VectorCopy(nodestart,             nodestackline[nodestackpos]); VectorLerp(nodestart, f, nodeend, nodestackline[nodestackpos] + 3); nodestack[nodestackpos++] = node->back;                      VectorCopy(nodestart,             nodestackline[nodestackpos]); VectorCopy(              nodeend, nodestackline[nodestackpos] + 3); nodestack[nodestackpos++] = node->front; break;
6851                         case  3: /* <<>> */                                                                                                                                                                                                                      VectorCopy(nodestart,             nodestackline[nodestackpos]); VectorCopy(              nodeend, nodestackline[nodestackpos] + 3); nodestack[nodestackpos++] = node->front; break;
6852                         case  4: /* >><> */                     VectorCopy(nodestart,             nodestackline[nodestackpos]); VectorCopy(              nodeend, nodestackline[nodestackpos] + 3); nodestack[nodestackpos++] = node->back;  f = d3 / (d3 - d4); VectorLerp(nodestart, f, nodeend, nodestackline[nodestackpos]); VectorCopy(              nodeend, nodestackline[nodestackpos] + 3); nodestack[nodestackpos++] = node->front; break;
6853                         case  5: /* <><> */ f = d1 / (d1 - d2); VectorLerp(nodestart, f, nodeend, nodestackline[nodestackpos]); VectorCopy(              nodeend, nodestackline[nodestackpos] + 3); nodestack[nodestackpos++] = node->back;  f = d3 / (d3 - d4); VectorLerp(nodestart, f, nodeend, nodestackline[nodestackpos]); VectorCopy(              nodeend, nodestackline[nodestackpos] + 3); nodestack[nodestackpos++] = node->front; break;
6854                         case  6: /* ><<> */ f = d1 / (d1 - d2); VectorCopy(nodestart,             nodestackline[nodestackpos]); VectorLerp(nodestart, f, nodeend, nodestackline[nodestackpos] + 3); nodestack[nodestackpos++] = node->back;  f = d3 / (d3 - d4); VectorLerp(nodestart, f, nodeend, nodestackline[nodestackpos]); VectorCopy(              nodeend, nodestackline[nodestackpos] + 3); nodestack[nodestackpos++] = node->front; break;
6855                         case  7: /* <<<> */                                                                                                                                                                                                  f = d3 / (d3 - d4); VectorLerp(nodestart, f, nodeend, nodestackline[nodestackpos]); VectorCopy(              nodeend, nodestackline[nodestackpos] + 3); nodestack[nodestackpos++] = node->front; break;
6856                         case  8: /* >>>< */                     VectorCopy(nodestart,             nodestackline[nodestackpos]); VectorCopy(              nodeend, nodestackline[nodestackpos] + 3); nodestack[nodestackpos++] = node->back;  f = d3 / (d3 - d4); VectorCopy(nodestart,             nodestackline[nodestackpos]); VectorLerp(nodestart, f, nodeend, nodestackline[nodestackpos] + 3); nodestack[nodestackpos++] = node->front; break;
6857                         case  9: /* <>>< */ f = d1 / (d1 - d2); VectorLerp(nodestart, f, nodeend, nodestackline[nodestackpos]); VectorCopy(              nodeend, nodestackline[nodestackpos] + 3); nodestack[nodestackpos++] = node->back;  f = d3 / (d3 - d4); VectorCopy(nodestart,             nodestackline[nodestackpos]); VectorLerp(nodestart, f, nodeend, nodestackline[nodestackpos] + 3); nodestack[nodestackpos++] = node->front; break;
6858                         case 10: /* ><>< */ f = d1 / (d1 - d2); VectorCopy(nodestart,             nodestackline[nodestackpos]); VectorLerp(nodestart, f, nodeend, nodestackline[nodestackpos] + 3); nodestack[nodestackpos++] = node->back;  f = d3 / (d3 - d4); VectorCopy(nodestart,             nodestackline[nodestackpos]); VectorLerp(nodestart, f, nodeend, nodestackline[nodestackpos] + 3); nodestack[nodestackpos++] = node->front; break;
6859                         case 11: /* <<>< */                                                                                                                                                                                                  f = d3 / (d3 - d4); VectorCopy(nodestart,             nodestackline[nodestackpos]); VectorLerp(nodestart, f, nodeend, nodestackline[nodestackpos] + 3); nodestack[nodestackpos++] = node->front; break;
6860                         case 12: /* >><< */                     VectorCopy(nodestart,             nodestackline[nodestackpos]); VectorCopy(              nodeend, nodestackline[nodestackpos] + 3); nodestack[nodestackpos++] = node->back;                                                                                                                                                                                                   break;
6861                         case 13: /* <><< */ f = d1 / (d1 - d2); VectorLerp(nodestart, f, nodeend, nodestackline[nodestackpos]); VectorCopy(              nodeend, nodestackline[nodestackpos] + 3); nodestack[nodestackpos++] = node->back;                                                                                                                                                                                                   break;
6862                         case 14: /* ><<< */ f = d1 / (d1 - d2); VectorCopy(nodestart,             nodestackline[nodestackpos]); VectorLerp(nodestart, f, nodeend, nodestackline[nodestackpos] + 3); nodestack[nodestackpos++] = node->back;                                                                                                                                                                                                   break;
6863                         case 15: /* <<<< */                                                                                                                                                                                                                                                                                                                                                                                                   break;
6864                         }
6865                 }
6866                 else if (node->type == BIH_UNORDERED)
6867                 {
6868                         // calculate sweep bounds for this node
6869                         // copy node bounds into local variables
6870                         VectorCopy(node->mins, nodebigmins);
6871                         VectorCopy(node->maxs, nodebigmaxs);
6872                         // clip line to this node bounds
6873                         axis = 0; d1 = nodestart[axis] - nodebigmins[axis]; d2 = nodeend[axis] - nodebigmins[axis]; if (d1 < 0) { if (d2 < 0) continue; f = d1 / (d1 - d2); VectorLerp(nodestart, f, nodeend, nodestart); } else if (d2 < 0) { f = d1 / (d1 - d2); VectorLerp(nodestart, f, nodeend, nodeend); } d1 = nodebigmaxs[axis] - nodestart[axis]; d2 = nodebigmaxs[axis] - nodeend[axis]; if (d1 < 0) { if (d2 < 0) continue; f = d1 / (d1 - d2); VectorLerp(nodestart, f, nodeend, nodestart); } else if (d2 < 0) { f = d1 / (d1 - d2); VectorLerp(nodestart, f, nodeend, nodeend); }
6874                         axis = 1; d1 = nodestart[axis] - nodebigmins[axis]; d2 = nodeend[axis] - nodebigmins[axis]; if (d1 < 0) { if (d2 < 0) continue; f = d1 / (d1 - d2); VectorLerp(nodestart, f, nodeend, nodestart); } else if (d2 < 0) { f = d1 / (d1 - d2); VectorLerp(nodestart, f, nodeend, nodeend); } d1 = nodebigmaxs[axis] - nodestart[axis]; d2 = nodebigmaxs[axis] - nodeend[axis]; if (d1 < 0) { if (d2 < 0) continue; f = d1 / (d1 - d2); VectorLerp(nodestart, f, nodeend, nodestart); } else if (d2 < 0) { f = d1 / (d1 - d2); VectorLerp(nodestart, f, nodeend, nodeend); }
6875                         axis = 2; d1 = nodestart[axis] - nodebigmins[axis]; d2 = nodeend[axis] - nodebigmins[axis]; if (d1 < 0) { if (d2 < 0) continue; f = d1 / (d1 - d2); VectorLerp(nodestart, f, nodeend, nodestart); } else if (d2 < 0) { f = d1 / (d1 - d2); VectorLerp(nodestart, f, nodeend, nodeend); } d1 = nodebigmaxs[axis] - nodestart[axis]; d2 = nodebigmaxs[axis] - nodeend[axis]; if (d1 < 0) { if (d2 < 0) continue; f = d1 / (d1 - d2); VectorLerp(nodestart, f, nodeend, nodestart); } else if (d2 < 0) { f = d1 / (d1 - d2); VectorLerp(nodestart, f, nodeend, nodeend); }
6876                         // some of the line intersected the enlarged node box
6877                         // calculate sweep bounds for this node
6878                         sweepnodemins[0] = min(nodestart[0], nodeend[0]) - 1;
6879                         sweepnodemins[1] = min(nodestart[1], nodeend[1]) - 1;
6880                         sweepnodemins[2] = min(nodestart[2], nodeend[2]) - 1;
6881                         sweepnodemaxs[0] = max(nodestart[0], nodeend[0]) + 1;
6882                         sweepnodemaxs[1] = max(nodestart[1], nodeend[1]) + 1;
6883                         sweepnodemaxs[2] = max(nodestart[2], nodeend[2]) + 1;
6884                         for (axis = 0;axis < BIH_MAXUNORDEREDCHILDREN && node->children[axis] >= 0;axis++)
6885                         {
6886                                 leaf = bih->leafs + node->children[axis];
6887                                 if (!BoxesOverlap(sweepnodemins, sweepnodemaxs, leaf->mins, leaf->maxs))
6888                                         continue;
6889                                 switch(leaf->type)
6890                                 {
6891                                 case BIH_BRUSH:
6892                                         brush = model->brush.data_brushes[leaf->itemindex].colbrushf;
6893                                         Collision_TraceLineBrushFloat(trace, start, end, brush, brush);
6894                                         break;
6895                                 case BIH_COLLISIONTRIANGLE:
6896                                         if (!mod_q3bsp_curves_collisions.integer)
6897                                                 continue;
6898                                         e = model->brush.data_collisionelement3i + 3*leaf->itemindex;
6899                                         texture = model->data_textures + leaf->textureindex;
6900                                         Collision_TraceLineTriangleFloat(trace, start, end, model->brush.data_collisionvertex3f + e[0] * 3, model->brush.data_collisionvertex3f + e[1] * 3, model->brush.data_collisionvertex3f + e[2] * 3, texture->supercontents, texture->surfaceflags, texture);
6901                                         break;
6902                                 case BIH_RENDERTRIANGLE:
6903                                         e = model->surfmesh.data_element3i + 3*leaf->itemindex;
6904                                         texture = model->data_textures + leaf->textureindex;
6905                                         Collision_TraceLineTriangleFloat(trace, start, end, model->surfmesh.data_vertex3f + e[0] * 3, model->surfmesh.data_vertex3f + e[1] * 3, model->surfmesh.data_vertex3f + e[2] * 3, texture->supercontents, texture->surfaceflags, texture);
6906                                         break;
6907                                 }
6908                         }
6909                 }
6910         }
6911 }
6912
6913 void Mod_CollisionBIH_TraceLine(dp_model_t *model, const frameblend_t *frameblend, const skeleton_t *skeleton, trace_t *trace, const vec3_t start, const vec3_t end, int hitsupercontentsmask)
6914 {
6915         if (VectorCompare(start, end))
6916         {
6917                 Mod_CollisionBIH_TracePoint(model, frameblend, skeleton, trace, start, hitsupercontentsmask);
6918                 return;
6919         }
6920         Mod_CollisionBIH_TraceLineShared(model, frameblend, skeleton, trace, start, end, hitsupercontentsmask, &model->collision_bih);
6921 }
6922
6923 void Mod_CollisionBIH_TraceBrush(dp_model_t *model, const frameblend_t *frameblend, const skeleton_t *skeleton, trace_t *trace, colbrushf_t *thisbrush_start, colbrushf_t *thisbrush_end, int hitsupercontentsmask)
6924 {
6925         const bih_t *bih;
6926         const bih_leaf_t *leaf;
6927         const bih_node_t *node;
6928         const colbrushf_t *brush;
6929         const int *e;
6930         const texture_t *texture;
6931         vec3_t start, end, startmins, startmaxs, endmins, endmaxs, mins, maxs;
6932         vec3_t nodebigmins, nodebigmaxs, nodestart, nodeend, sweepnodemins, sweepnodemaxs;
6933         vec_t d1, d2, d3, d4, f, nodestackline[1024][6];
6934         int axis, nodenum, nodestackpos = 0, nodestack[1024];
6935
6936         if (mod_q3bsp_optimizedtraceline.integer && VectorCompare(thisbrush_start->mins, thisbrush_start->maxs) && VectorCompare(thisbrush_end->mins, thisbrush_end->maxs))
6937         {
6938                 if (VectorCompare(thisbrush_start->mins, thisbrush_end->mins))
6939                         Mod_CollisionBIH_TracePoint(model, frameblend, skeleton, trace, thisbrush_start->mins, hitsupercontentsmask);
6940                 else
6941                         Mod_CollisionBIH_TraceLine(model, frameblend, skeleton, trace, thisbrush_start->mins, thisbrush_end->mins, hitsupercontentsmask);
6942                 return;
6943         }
6944
6945         bih = &model->collision_bih;
6946         if(!bih->nodes)
6947                 return;
6948         nodenum = bih->rootnode;
6949
6950         // box trace, performed as brush trace
6951         memset(trace, 0, sizeof(*trace));
6952         trace->fraction = 1;
6953         trace->hitsupercontentsmask = hitsupercontentsmask;
6954
6955         // calculate tracebox-like parameters for efficient culling
6956         VectorMAM(0.5f, thisbrush_start->mins, 0.5f, thisbrush_start->maxs, start);
6957         VectorMAM(0.5f, thisbrush_end->mins, 0.5f, thisbrush_end->maxs, end);
6958         VectorSubtract(thisbrush_start->mins, start, startmins);
6959         VectorSubtract(thisbrush_start->maxs, start, startmaxs);
6960         VectorSubtract(thisbrush_end->mins, end, endmins);
6961         VectorSubtract(thisbrush_end->maxs, end, endmaxs);
6962         mins[0] = min(startmins[0], endmins[0]);
6963         mins[1] = min(startmins[1], endmins[1]);
6964         mins[2] = min(startmins[2], endmins[2]);
6965         maxs[0] = max(startmaxs[0], endmaxs[0]);
6966         maxs[1] = max(startmaxs[1], endmaxs[1]);
6967         maxs[2] = max(startmaxs[2], endmaxs[2]);
6968
6969         // push first node
6970         nodestackline[nodestackpos][0] = start[0];
6971         nodestackline[nodestackpos][1] = start[1];
6972         nodestackline[nodestackpos][2] = start[2];
6973         nodestackline[nodestackpos][3] = end[0];
6974         nodestackline[nodestackpos][4] = end[1];
6975         nodestackline[nodestackpos][5] = end[2];
6976         nodestack[nodestackpos++] = nodenum;
6977         while (nodestackpos)
6978         {
6979                 nodenum = nodestack[--nodestackpos];
6980                 node = bih->nodes + nodenum;
6981                 VectorCopy(nodestackline[nodestackpos], nodestart);
6982                 VectorCopy(nodestackline[nodestackpos] + 3, nodeend);
6983                 sweepnodemins[0] = min(nodestart[0], nodeend[0]) + mins[0] - 1;
6984                 sweepnodemins[1] = min(nodestart[1], nodeend[1]) + mins[1] - 1;
6985                 sweepnodemins[2] = min(nodestart[2], nodeend[2]) + mins[2] - 1;
6986                 sweepnodemaxs[0] = max(nodestart[0], nodeend[0]) + maxs[0] + 1;
6987                 sweepnodemaxs[1] = max(nodestart[1], nodeend[1]) + maxs[1] + 1;
6988                 sweepnodemaxs[2] = max(nodestart[2], nodeend[2]) + maxs[2] + 1;
6989                 if (!BoxesOverlap(sweepnodemins, sweepnodemaxs, node->mins, node->maxs))
6990                         continue;
6991                 if (node->type <= BIH_SPLITZ && nodestackpos+2 <= 1024)
6992                 {
6993                         // recurse children of the split
6994                         axis = node->type - BIH_SPLITX;
6995                         d1 = node->backmax - nodestart[axis] - mins[axis];
6996                         d2 = node->backmax - nodeend[axis] - mins[axis];
6997                         d3 = nodestart[axis] - node->frontmin + maxs[axis];
6998                         d4 = nodeend[axis] - node->frontmin + maxs[axis];
6999                         switch((d1 < 0) | ((d2 < 0) << 1) | ((d3 < 0) << 2) | ((d4 < 0) << 3))
7000                         {
7001                         case  0: /* >>>> */                     VectorCopy(nodestart,             nodestackline[nodestackpos]); VectorCopy(              nodeend, nodestackline[nodestackpos] + 3); nodestack[nodestackpos++] = node->back;                      VectorCopy(nodestart,             nodestackline[nodestackpos]); VectorCopy(              nodeend, nodestackline[nodestackpos] + 3); nodestack[nodestackpos++] = node->front; break;
7002                         case  1: /* <>>> */ f = d1 / (d1 - d2); VectorLerp(nodestart, f, nodeend, nodestackline[nodestackpos]); VectorCopy(              nodeend, nodestackline[nodestackpos] + 3); nodestack[nodestackpos++] = node->back;                      VectorCopy(nodestart,             nodestackline[nodestackpos]); VectorCopy(              nodeend, nodestackline[nodestackpos] + 3); nodestack[nodestackpos++] = node->front; break;
7003                         case  2: /* ><>> */ f = d1 / (d1 - d2); VectorCopy(nodestart,             nodestackline[nodestackpos]); VectorLerp(nodestart, f, nodeend, nodestackline[nodestackpos] + 3); nodestack[nodestackpos++] = node->back;                      VectorCopy(nodestart,             nodestackline[nodestackpos]); VectorCopy(              nodeend, nodestackline[nodestackpos] + 3); nodestack[nodestackpos++] = node->front; break;
7004                         case  3: /* <<>> */                                                                                                                                                                                                                      VectorCopy(nodestart,             nodestackline[nodestackpos]); VectorCopy(              nodeend, nodestackline[nodestackpos] + 3); nodestack[nodestackpos++] = node->front; break;
7005                         case  4: /* >><> */                     VectorCopy(nodestart,             nodestackline[nodestackpos]); VectorCopy(              nodeend, nodestackline[nodestackpos] + 3); nodestack[nodestackpos++] = node->back;  f = d3 / (d3 - d4); VectorLerp(nodestart, f, nodeend, nodestackline[nodestackpos]); VectorCopy(              nodeend, nodestackline[nodestackpos] + 3); nodestack[nodestackpos++] = node->front; break;
7006                         case  5: /* <><> */ f = d1 / (d1 - d2); VectorLerp(nodestart, f, nodeend, nodestackline[nodestackpos]); VectorCopy(              nodeend, nodestackline[nodestackpos] + 3); nodestack[nodestackpos++] = node->back;  f = d3 / (d3 - d4); VectorLerp(nodestart, f, nodeend, nodestackline[nodestackpos]); VectorCopy(              nodeend, nodestackline[nodestackpos] + 3); nodestack[nodestackpos++] = node->front; break;
7007                         case  6: /* ><<> */ f = d1 / (d1 - d2); VectorCopy(nodestart,             nodestackline[nodestackpos]); VectorLerp(nodestart, f, nodeend, nodestackline[nodestackpos] + 3); nodestack[nodestackpos++] = node->back;  f = d3 / (d3 - d4); VectorLerp(nodestart, f, nodeend, nodestackline[nodestackpos]); VectorCopy(              nodeend, nodestackline[nodestackpos] + 3); nodestack[nodestackpos++] = node->front; break;
7008                         case  7: /* <<<> */                                                                                                                                                                                                  f = d3 / (d3 - d4); VectorLerp(nodestart, f, nodeend, nodestackline[nodestackpos]); VectorCopy(              nodeend, nodestackline[nodestackpos] + 3); nodestack[nodestackpos++] = node->front; break;
7009                         case  8: /* >>>< */                     VectorCopy(nodestart,             nodestackline[nodestackpos]); VectorCopy(              nodeend, nodestackline[nodestackpos] + 3); nodestack[nodestackpos++] = node->back;  f = d3 / (d3 - d4); VectorCopy(nodestart,             nodestackline[nodestackpos]); VectorLerp(nodestart, f, nodeend, nodestackline[nodestackpos] + 3); nodestack[nodestackpos++] = node->front; break;
7010                         case  9: /* <>>< */ f = d1 / (d1 - d2); VectorLerp(nodestart, f, nodeend, nodestackline[nodestackpos]); VectorCopy(              nodeend, nodestackline[nodestackpos] + 3); nodestack[nodestackpos++] = node->back;  f = d3 / (d3 - d4); VectorCopy(nodestart,             nodestackline[nodestackpos]); VectorLerp(nodestart, f, nodeend, nodestackline[nodestackpos] + 3); nodestack[nodestackpos++] = node->front; break;
7011                         case 10: /* ><>< */ f = d1 / (d1 - d2); VectorCopy(nodestart,             nodestackline[nodestackpos]); VectorLerp(nodestart, f, nodeend, nodestackline[nodestackpos] + 3); nodestack[nodestackpos++] = node->back;  f = d3 / (d3 - d4); VectorCopy(nodestart,             nodestackline[nodestackpos]); VectorLerp(nodestart, f, nodeend, nodestackline[nodestackpos] + 3); nodestack[nodestackpos++] = node->front; break;
7012                         case 11: /* <<>< */                                                                                                                                                                                                  f = d3 / (d3 - d4); VectorCopy(nodestart,             nodestackline[nodestackpos]); VectorLerp(nodestart, f, nodeend, nodestackline[nodestackpos] + 3); nodestack[nodestackpos++] = node->front; break;
7013                         case 12: /* >><< */                     VectorCopy(nodestart,             nodestackline[nodestackpos]); VectorCopy(              nodeend, nodestackline[nodestackpos] + 3); nodestack[nodestackpos++] = node->back;                                                                                                                                                                                                   break;
7014                         case 13: /* <><< */ f = d1 / (d1 - d2); VectorLerp(nodestart, f, nodeend, nodestackline[nodestackpos]); VectorCopy(              nodeend, nodestackline[nodestackpos] + 3); nodestack[nodestackpos++] = node->back;                                                                                                                                                                                                   break;
7015                         case 14: /* ><<< */ f = d1 / (d1 - d2); VectorCopy(nodestart,             nodestackline[nodestackpos]); VectorLerp(nodestart, f, nodeend, nodestackline[nodestackpos] + 3); nodestack[nodestackpos++] = node->back;                                                                                                                                                                                                   break;
7016                         case 15: /* <<<< */                                                                                                                                                                                                                                                                                                                                                                                                   break;
7017                         }
7018                 }
7019                 else if (node->type == BIH_UNORDERED)
7020                 {
7021                         // calculate sweep bounds for this node
7022                         // copy node bounds into local variables and expand to get Minkowski Sum of the two shapes
7023                         VectorSubtract(node->mins, maxs, nodebigmins);
7024                         VectorSubtract(node->maxs, mins, nodebigmaxs);
7025                         // clip line to this node bounds
7026                         axis = 0; d1 = nodestart[axis] - nodebigmins[axis]; d2 = nodeend[axis] - nodebigmins[axis]; if (d1 < 0) { if (d2 < 0) continue; f = d1 / (d1 - d2); VectorLerp(nodestart, f, nodeend, nodestart); } else if (d2 < 0) { f = d1 / (d1 - d2); VectorLerp(nodestart, f, nodeend, nodeend); } d1 = nodebigmaxs[axis] - nodestart[axis]; d2 = nodebigmaxs[axis] - nodeend[axis]; if (d1 < 0) { if (d2 < 0) continue; f = d1 / (d1 - d2); VectorLerp(nodestart, f, nodeend, nodestart); } else if (d2 < 0) { f = d1 / (d1 - d2); VectorLerp(nodestart, f, nodeend, nodeend); }
7027                         axis = 1; d1 = nodestart[axis] - nodebigmins[axis]; d2 = nodeend[axis] - nodebigmins[axis]; if (d1 < 0) { if (d2 < 0) continue; f = d1 / (d1 - d2); VectorLerp(nodestart, f, nodeend, nodestart); } else if (d2 < 0) { f = d1 / (d1 - d2); VectorLerp(nodestart, f, nodeend, nodeend); } d1 = nodebigmaxs[axis] - nodestart[axis]; d2 = nodebigmaxs[axis] - nodeend[axis]; if (d1 < 0) { if (d2 < 0) continue; f = d1 / (d1 - d2); VectorLerp(nodestart, f, nodeend, nodestart); } else if (d2 < 0) { f = d1 / (d1 - d2); VectorLerp(nodestart, f, nodeend, nodeend); }
7028                         axis = 2; d1 = nodestart[axis] - nodebigmins[axis]; d2 = nodeend[axis] - nodebigmins[axis]; if (d1 < 0) { if (d2 < 0) continue; f = d1 / (d1 - d2); VectorLerp(nodestart, f, nodeend, nodestart); } else if (d2 < 0) { f = d1 / (d1 - d2); VectorLerp(nodestart, f, nodeend, nodeend); } d1 = nodebigmaxs[axis] - nodestart[axis]; d2 = nodebigmaxs[axis] - nodeend[axis]; if (d1 < 0) { if (d2 < 0) continue; f = d1 / (d1 - d2); VectorLerp(nodestart, f, nodeend, nodestart); } else if (d2 < 0) { f = d1 / (d1 - d2); VectorLerp(nodestart, f, nodeend, nodeend); }
7029                         // some of the line intersected the enlarged node box
7030                         // calculate sweep bounds for this node
7031                         sweepnodemins[0] = min(nodestart[0], nodeend[0]) + mins[0] - 1;
7032                         sweepnodemins[1] = min(nodestart[1], nodeend[1]) + mins[1] - 1;
7033                         sweepnodemins[2] = min(nodestart[2], nodeend[2]) + mins[2] - 1;
7034                         sweepnodemaxs[0] = max(nodestart[0], nodeend[0]) + maxs[0] + 1;
7035                         sweepnodemaxs[1] = max(nodestart[1], nodeend[1]) + maxs[1] + 1;
7036                         sweepnodemaxs[2] = max(nodestart[2], nodeend[2]) + maxs[2] + 1;
7037                         for (axis = 0;axis < BIH_MAXUNORDEREDCHILDREN && node->children[axis] >= 0;axis++)
7038                         {
7039                                 leaf = bih->leafs + node->children[axis];
7040                                 if (!BoxesOverlap(sweepnodemins, sweepnodemaxs, leaf->mins, leaf->maxs))
7041                                         continue;
7042                                 switch(leaf->type)
7043                                 {
7044                                 case BIH_BRUSH:
7045                                         brush = model->brush.data_brushes[leaf->itemindex].colbrushf;
7046                                         Collision_TraceBrushBrushFloat(trace, thisbrush_start, thisbrush_end, brush, brush);
7047                                         break;
7048                                 case BIH_COLLISIONTRIANGLE:
7049                                         if (!mod_q3bsp_curves_collisions.integer)
7050                                                 continue;
7051                                         e = model->brush.data_collisionelement3i + 3*leaf->itemindex;
7052                                         texture = model->data_textures + leaf->textureindex;
7053                                         Collision_TraceBrushTriangleFloat(trace, thisbrush_start, thisbrush_end, model->brush.data_collisionvertex3f + e[0] * 3, model->brush.data_collisionvertex3f + e[1] * 3, model->brush.data_collisionvertex3f + e[2] * 3, texture->supercontents, texture->surfaceflags, texture);
7054                                         break;
7055                                 case BIH_RENDERTRIANGLE:
7056                                         e = model->surfmesh.data_element3i + 3*leaf->itemindex;
7057                                         texture = model->data_textures + leaf->textureindex;
7058                                         Collision_TraceBrushTriangleFloat(trace, thisbrush_start, thisbrush_end, model->surfmesh.data_vertex3f + e[0] * 3, model->surfmesh.data_vertex3f + e[1] * 3, model->surfmesh.data_vertex3f + e[2] * 3, texture->supercontents, texture->surfaceflags, texture);
7059                                         break;
7060                                 }
7061                         }
7062                 }
7063         }
7064 }
7065
7066 void Mod_CollisionBIH_TraceBox(dp_model_t *model, const frameblend_t *frameblend, const skeleton_t *skeleton, trace_t *trace, const vec3_t start, const vec3_t boxmins, const vec3_t boxmaxs, const vec3_t end, int hitsupercontentsmask)
7067 {
7068         colboxbrushf_t thisbrush_start, thisbrush_end;
7069         vec3_t boxstartmins, boxstartmaxs, boxendmins, boxendmaxs;
7070
7071         // box trace, performed as brush trace
7072         VectorAdd(start, boxmins, boxstartmins);
7073         VectorAdd(start, boxmaxs, boxstartmaxs);
7074         VectorAdd(end, boxmins, boxendmins);
7075         VectorAdd(end, boxmaxs, boxendmaxs);
7076         Collision_BrushForBox(&thisbrush_start, boxstartmins, boxstartmaxs, 0, 0, NULL);
7077         Collision_BrushForBox(&thisbrush_end, boxendmins, boxendmaxs, 0, 0, NULL);
7078         Mod_CollisionBIH_TraceBrush(model, frameblend, skeleton, trace, &thisbrush_start.brush, &thisbrush_end.brush, hitsupercontentsmask);
7079 }
7080
7081
7082 int Mod_CollisionBIH_PointSuperContents(struct model_s *model, int frame, const vec3_t point)
7083 {
7084         trace_t trace;
7085         Mod_CollisionBIH_TracePoint(model, NULL, NULL, &trace, point, 0);
7086         return trace.startsupercontents;
7087 }
7088
7089 qboolean Mod_CollisionBIH_TraceLineOfSight(struct model_s *model, const vec3_t start, const vec3_t end)
7090 {
7091         trace_t trace;
7092         Mod_CollisionBIH_TraceLine(model, NULL, NULL, &trace, start, end, SUPERCONTENTS_VISBLOCKERMASK);
7093         return trace.fraction == 1;
7094 }
7095
7096 void Mod_CollisionBIH_TracePoint_Mesh(dp_model_t *model, const frameblend_t *frameblend, const skeleton_t *skeleton, trace_t *trace, const vec3_t start, int hitsupercontentsmask)
7097 {
7098 #if 0
7099         // broken - needs to be modified to count front faces and backfaces to figure out if it is in solid
7100         vec3_t end;
7101         int hitsupercontents;
7102         VectorSet(end, start[0], start[1], model->normalmins[2]);
7103 #endif
7104         memset(trace, 0, sizeof(*trace));
7105         trace->fraction = 1;
7106         trace->hitsupercontentsmask = hitsupercontentsmask;
7107 #if 0
7108         Mod_CollisionBIH_TraceLine(model, frameblend, skeleton, trace, start, end, hitsupercontentsmask);
7109         hitsupercontents = trace->hitsupercontents;
7110         memset(trace, 0, sizeof(*trace));
7111         trace->fraction = 1;
7112         trace->hitsupercontentsmask = hitsupercontentsmask;
7113         trace->startsupercontents = hitsupercontents;
7114 #endif
7115 }
7116
7117 int Mod_CollisionBIH_PointSuperContents_Mesh(struct model_s *model, int frame, const vec3_t start)
7118 {
7119 #if 0
7120         // broken - needs to be modified to count front faces and backfaces to figure out if it is in solid
7121         trace_t trace;
7122         vec3_t end;
7123         VectorSet(end, start[0], start[1], model->normalmins[2]);
7124         memset(&trace, 0, sizeof(trace));
7125         trace.fraction = 1;
7126         trace.hitsupercontentsmask = 0;
7127         Mod_CollisionBIH_TraceLine(model, frameblend, skeleton, trace, start, end, hitsupercontentsmask);
7128         return trace.hitsupercontents;
7129 #else
7130         return 0;
7131 #endif
7132 }
7133
7134 static void Mod_Q3BSP_TracePoint_RecursiveBSPNode(trace_t *trace, dp_model_t *model, mnode_t *node, const vec3_t point, int markframe)
7135 {
7136         int i;
7137         mleaf_t *leaf;
7138         colbrushf_t *brush;
7139         // find which leaf the point is in
7140         while (node->plane)
7141                 node = node->children[(node->plane->type < 3 ? point[node->plane->type] : DotProduct(point, node->plane->normal)) < node->plane->dist];
7142         // point trace the brushes
7143         leaf = (mleaf_t *)node;
7144         for (i = 0;i < leaf->numleafbrushes;i++)
7145         {
7146                 brush = model->brush.data_brushes[leaf->firstleafbrush[i]].colbrushf;
7147                 if (brush && brush->markframe != markframe && BoxesOverlap(point, point, brush->mins, brush->maxs))
7148                 {
7149                         brush->markframe = markframe;
7150                         Collision_TracePointBrushFloat(trace, point, brush);
7151                 }
7152         }
7153         // can't do point traces on curves (they have no thickness)
7154 }
7155
7156 static void Mod_Q3BSP_TraceLine_RecursiveBSPNode(trace_t *trace, dp_model_t *model, mnode_t *node, const vec3_t start, const vec3_t end, vec_t startfrac, vec_t endfrac, const vec3_t linestart, const vec3_t lineend, int markframe, const vec3_t segmentmins, const vec3_t segmentmaxs)
7157 {
7158         int i, startside, endside;
7159         float dist1, dist2, midfrac, mid[3], nodesegmentmins[3], nodesegmentmaxs[3];
7160         mleaf_t *leaf;
7161         msurface_t *surface;
7162         mplane_t *plane;
7163         colbrushf_t *brush;
7164         // walk the tree until we hit a leaf, recursing for any split cases
7165         while (node->plane)
7166         {
7167 #if 0
7168                 if (!BoxesOverlap(segmentmins, segmentmaxs, node->mins, node->maxs))
7169                         return;
7170                 Mod_Q3BSP_TraceLine_RecursiveBSPNode(trace, model, node->children[0], start, end, startfrac, endfrac, linestart, lineend, markframe, segmentmins, segmentmaxs);
7171                 node = node->children[1];
7172 #else
7173                 // abort if this part of the bsp tree can not be hit by this trace
7174 //              if (!(node->combinedsupercontents & trace->hitsupercontentsmask))
7175 //                      return;
7176                 plane = node->plane;
7177                 // axial planes are much more common than non-axial, so an optimized
7178                 // axial case pays off here
7179                 if (plane->type < 3)
7180                 {
7181                         dist1 = start[plane->type] - plane->dist;
7182                         dist2 = end[plane->type] - plane->dist;
7183                 }
7184                 else
7185                 {
7186                         dist1 = DotProduct(start, plane->normal) - plane->dist;
7187                         dist2 = DotProduct(end, plane->normal) - plane->dist;
7188                 }
7189                 startside = dist1 < 0;
7190                 endside = dist2 < 0;
7191                 if (startside == endside)
7192                 {
7193                         // most of the time the line fragment is on one side of the plane
7194                         node = node->children[startside];
7195                 }
7196                 else
7197                 {
7198                         // line crosses node plane, split the line
7199                         dist1 = PlaneDiff(linestart, plane);
7200                         dist2 = PlaneDiff(lineend, plane);
7201                         midfrac = dist1 / (dist1 - dist2);
7202                         VectorLerp(linestart, midfrac, lineend, mid);
7203                         // take the near side first
7204                         Mod_Q3BSP_TraceLine_RecursiveBSPNode(trace, model, node->children[startside], start, mid, startfrac, midfrac, linestart, lineend, markframe, segmentmins, segmentmaxs);
7205                         // if we found an impact on the front side, don't waste time
7206                         // exploring the far side
7207                         if (midfrac <= trace->fraction)
7208                                 Mod_Q3BSP_TraceLine_RecursiveBSPNode(trace, model, node->children[endside], mid, end, midfrac, endfrac, linestart, lineend, markframe, segmentmins, segmentmaxs);
7209                         return;
7210                 }
7211 #endif
7212         }
7213         // abort if this part of the bsp tree can not be hit by this trace
7214 //      if (!(node->combinedsupercontents & trace->hitsupercontentsmask))
7215 //              return;
7216         // hit a leaf
7217         nodesegmentmins[0] = min(start[0], end[0]) - 1;
7218         nodesegmentmins[1] = min(start[1], end[1]) - 1;
7219         nodesegmentmins[2] = min(start[2], end[2]) - 1;
7220         nodesegmentmaxs[0] = max(start[0], end[0]) + 1;
7221         nodesegmentmaxs[1] = max(start[1], end[1]) + 1;
7222         nodesegmentmaxs[2] = max(start[2], end[2]) + 1;
7223         // line trace the brushes
7224         leaf = (mleaf_t *)node;
7225 #if 0
7226         if (!BoxesOverlap(segmentmins, segmentmaxs, leaf->mins, leaf->maxs))
7227                 return;
7228 #endif
7229         for (i = 0;i < leaf->numleafbrushes;i++)
7230         {
7231                 brush = model->brush.data_brushes[leaf->firstleafbrush[i]].colbrushf;
7232                 if (brush && brush->markframe != markframe && BoxesOverlap(nodesegmentmins, nodesegmentmaxs, brush->mins, brush->maxs))
7233                 {
7234                         brush->markframe = markframe;
7235                         Collision_TraceLineBrushFloat(trace, linestart, lineend, brush, brush);
7236                 }
7237         }
7238         // can't do point traces on curves (they have no thickness)
7239         if (leaf->containscollisionsurfaces && mod_q3bsp_curves_collisions.integer && !VectorCompare(start, end))
7240         {
7241                 // line trace the curves
7242                 for (i = 0;i < leaf->numleafsurfaces;i++)
7243                 {
7244                         surface = model->data_surfaces + leaf->firstleafsurface[i];
7245                         if (surface->num_collisiontriangles && surface->deprecatedq3collisionmarkframe != markframe && BoxesOverlap(nodesegmentmins, nodesegmentmaxs, surface->mins, surface->maxs))
7246                         {
7247                                 surface->deprecatedq3collisionmarkframe = markframe;
7248                                 Collision_TraceLineTriangleMeshFloat(trace, linestart, lineend, surface->num_collisiontriangles, surface->deprecatedq3data_collisionelement3i, surface->deprecatedq3data_collisionvertex3f, surface->deprecatedq3num_collisionbboxstride, surface->deprecatedq3data_collisionbbox6f, surface->texture->supercontents, surface->texture->surfaceflags, surface->texture, segmentmins, segmentmaxs);
7249                         }
7250                 }
7251         }
7252 }
7253
7254 static void Mod_Q3BSP_TraceBrush_RecursiveBSPNode(trace_t *trace, dp_model_t *model, mnode_t *node, const colbrushf_t *thisbrush_start, const colbrushf_t *thisbrush_end, int markframe, const vec3_t segmentmins, const vec3_t segmentmaxs)
7255 {
7256         int i;
7257         int sides;
7258         mleaf_t *leaf;
7259         colbrushf_t *brush;
7260         msurface_t *surface;
7261         mplane_t *plane;
7262         float nodesegmentmins[3], nodesegmentmaxs[3];
7263         // walk the tree until we hit a leaf, recursing for any split cases
7264         while (node->plane)
7265         {
7266 #if 0
7267                 if (!BoxesOverlap(segmentmins, segmentmaxs, node->mins, node->maxs))
7268                         return;
7269                 Mod_Q3BSP_TraceBrush_RecursiveBSPNode(trace, model, node->children[0], thisbrush_start, thisbrush_end, markframe, segmentmins, segmentmaxs);
7270                 node = node->children[1];
7271 #else
7272                 // abort if this part of the bsp tree can not be hit by this trace
7273 //              if (!(node->combinedsupercontents & trace->hitsupercontentsmask))
7274 //                      return;
7275                 plane = node->plane;
7276                 // axial planes are much more common than non-axial, so an optimized
7277                 // axial case pays off here
7278                 if (plane->type < 3)
7279                 {
7280                         // this is an axial plane, compare bounding box directly to it and
7281                         // recurse sides accordingly
7282                         // recurse down node sides
7283                         // use an inlined axial BoxOnPlaneSide to slightly reduce overhead
7284                         //sides = BoxOnPlaneSide(nodesegmentmins, nodesegmentmaxs, plane);
7285                         //sides = ((segmentmaxs[plane->type] >= plane->dist) | ((segmentmins[plane->type] < plane->dist) << 1));
7286                         sides = ((segmentmaxs[plane->type] >= plane->dist) + ((segmentmins[plane->type] < plane->dist) * 2));
7287                 }
7288                 else
7289                 {
7290                         // this is a non-axial plane, so check if the start and end boxes
7291                         // are both on one side of the plane to handle 'diagonal' cases
7292                         sides = BoxOnPlaneSide(thisbrush_start->mins, thisbrush_start->maxs, plane) | BoxOnPlaneSide(thisbrush_end->mins, thisbrush_end->maxs, plane);
7293                 }
7294                 if (sides == 3)
7295                 {
7296                         // segment crosses plane
7297                         Mod_Q3BSP_TraceBrush_RecursiveBSPNode(trace, model, node->children[0], thisbrush_start, thisbrush_end, markframe, segmentmins, segmentmaxs);
7298                         sides = 2;
7299                 }
7300                 // if sides == 0 then the trace itself is bogus (Not A Number values),
7301                 // in this case we simply pretend the trace hit nothing
7302                 if (sides == 0)
7303                         return; // ERROR: NAN bounding box!
7304                 // take whichever side the segment box is on
7305                 node = node->children[sides - 1];
7306 #endif
7307         }
7308         // abort if this part of the bsp tree can not be hit by this trace
7309 //      if (!(node->combinedsupercontents & trace->hitsupercontentsmask))
7310 //              return;
7311         nodesegmentmins[0] = max(segmentmins[0], node->mins[0] - 1);
7312         nodesegmentmins[1] = max(segmentmins[1], node->mins[1] - 1);
7313         nodesegmentmins[2] = max(segmentmins[2], node->mins[2] - 1);
7314         nodesegmentmaxs[0] = min(segmentmaxs[0], node->maxs[0] + 1);
7315         nodesegmentmaxs[1] = min(segmentmaxs[1], node->maxs[1] + 1);
7316         nodesegmentmaxs[2] = min(segmentmaxs[2], node->maxs[2] + 1);
7317         // hit a leaf
7318         leaf = (mleaf_t *)node;
7319 #if 0
7320         if (!BoxesOverlap(segmentmins, segmentmaxs, leaf->mins, leaf->maxs))
7321                 return;
7322 #endif
7323         for (i = 0;i < leaf->numleafbrushes;i++)
7324         {
7325                 brush = model->brush.data_brushes[leaf->firstleafbrush[i]].colbrushf;
7326                 if (brush && brush->markframe != markframe && BoxesOverlap(nodesegmentmins, nodesegmentmaxs, brush->mins, brush->maxs))
7327                 {
7328                         brush->markframe = markframe;
7329                         Collision_TraceBrushBrushFloat(trace, thisbrush_start, thisbrush_end, brush, brush);
7330                 }
7331         }
7332         if (leaf->containscollisionsurfaces && mod_q3bsp_curves_collisions.integer)
7333         {
7334                 for (i = 0;i < leaf->numleafsurfaces;i++)
7335                 {
7336                         surface = model->data_surfaces + leaf->firstleafsurface[i];
7337                         if (surface->num_collisiontriangles && surface->deprecatedq3collisionmarkframe != markframe && BoxesOverlap(nodesegmentmins, nodesegmentmaxs, surface->mins, surface->maxs))
7338                         {
7339                                 surface->deprecatedq3collisionmarkframe = markframe;
7340                                 Collision_TraceBrushTriangleMeshFloat(trace, thisbrush_start, thisbrush_end, surface->num_collisiontriangles, surface->deprecatedq3data_collisionelement3i, surface->deprecatedq3data_collisionvertex3f, surface->deprecatedq3num_collisionbboxstride, surface->deprecatedq3data_collisionbbox6f, surface->texture->supercontents, surface->texture->surfaceflags, surface->texture, segmentmins, segmentmaxs);
7341                         }
7342                 }
7343         }
7344 }
7345
7346
7347 static int markframe = 0;
7348
7349 static void Mod_Q3BSP_TracePoint(dp_model_t *model, const frameblend_t *frameblend, const skeleton_t *skeleton, trace_t *trace, const vec3_t start, int hitsupercontentsmask)
7350 {
7351         int i;
7352         q3mbrush_t *brush;
7353         memset(trace, 0, sizeof(*trace));
7354         trace->fraction = 1;
7355         trace->hitsupercontentsmask = hitsupercontentsmask;
7356         if (mod_collision_bih.integer)
7357                 Mod_CollisionBIH_TracePoint(model, frameblend, skeleton, trace, start, hitsupercontentsmask);
7358         else if (model->brush.submodel)
7359         {
7360                 for (i = 0, brush = model->brush.data_brushes + model->firstmodelbrush;i < model->nummodelbrushes;i++, brush++)
7361                         if (brush->colbrushf)
7362                                 Collision_TracePointBrushFloat(trace, start, brush->colbrushf);
7363         }
7364         else
7365                 Mod_Q3BSP_TracePoint_RecursiveBSPNode(trace, model, model->brush.data_nodes, start, ++markframe);
7366 }
7367
7368 static void Mod_Q3BSP_TraceLine(dp_model_t *model, const frameblend_t *frameblend, const skeleton_t *skeleton, trace_t *trace, const vec3_t start, const vec3_t end, int hitsupercontentsmask)
7369 {
7370         int i;
7371         float segmentmins[3], segmentmaxs[3];
7372         msurface_t *surface;
7373         q3mbrush_t *brush;
7374
7375         if (VectorCompare(start, end))
7376         {
7377                 Mod_Q3BSP_TracePoint(model, frameblend, skeleton, trace, start, hitsupercontentsmask);
7378                 return;
7379         }
7380
7381         memset(trace, 0, sizeof(*trace));
7382         trace->fraction = 1;
7383         trace->hitsupercontentsmask = hitsupercontentsmask;
7384         segmentmins[0] = min(start[0], end[0]) - 1;
7385         segmentmins[1] = min(start[1], end[1]) - 1;
7386         segmentmins[2] = min(start[2], end[2]) - 1;
7387         segmentmaxs[0] = max(start[0], end[0]) + 1;
7388         segmentmaxs[1] = max(start[1], end[1]) + 1;
7389         segmentmaxs[2] = max(start[2], end[2]) + 1;
7390         if (mod_collision_bih.integer)
7391                 Mod_CollisionBIH_TraceLine(model, frameblend, skeleton, trace, start, end, hitsupercontentsmask);
7392         else if (model->brush.submodel)
7393         {
7394                 for (i = 0, brush = model->brush.data_brushes + model->firstmodelbrush;i < model->nummodelbrushes;i++, brush++)
7395                         if (brush->colbrushf && BoxesOverlap(segmentmins, segmentmaxs, brush->colbrushf->mins, brush->colbrushf->maxs))
7396                                 Collision_TraceLineBrushFloat(trace, start, end, brush->colbrushf, brush->colbrushf);
7397                 if (mod_q3bsp_curves_collisions.integer)
7398                         for (i = 0, surface = model->data_surfaces + model->firstmodelsurface;i < model->nummodelsurfaces;i++, surface++)
7399                                 if (surface->num_collisiontriangles && BoxesOverlap(segmentmins, segmentmaxs, surface->mins, surface->maxs))
7400                                         Collision_TraceLineTriangleMeshFloat(trace, start, end, surface->num_collisiontriangles, surface->deprecatedq3data_collisionelement3i, surface->deprecatedq3data_collisionvertex3f, surface->deprecatedq3num_collisionbboxstride, surface->deprecatedq3data_collisionbbox6f, surface->texture->supercontents, surface->texture->surfaceflags, surface->texture, segmentmins, segmentmaxs);
7401         }
7402         else
7403                 Mod_Q3BSP_TraceLine_RecursiveBSPNode(trace, model, model->brush.data_nodes, start, end, 0, 1, start, end, ++markframe, segmentmins, segmentmaxs);
7404 }
7405
7406 static void Mod_Q3BSP_TraceBrush(dp_model_t *model, const frameblend_t *frameblend, const skeleton_t *skeleton, trace_t *trace, colbrushf_t *start, colbrushf_t *end, int hitsupercontentsmask)
7407 {
7408         float segmentmins[3], segmentmaxs[3];
7409         int i;
7410         msurface_t *surface;
7411         q3mbrush_t *brush;
7412
7413         if (mod_q3bsp_optimizedtraceline.integer && VectorCompare(start->mins, start->maxs) && VectorCompare(end->mins, end->maxs))
7414         {
7415                 if (VectorCompare(start->mins, end->mins))
7416                         Mod_Q3BSP_TracePoint(model, frameblend, skeleton, trace, start->mins, hitsupercontentsmask);
7417                 else
7418                         Mod_Q3BSP_TraceLine(model, frameblend, skeleton, trace, start->mins, end->mins, hitsupercontentsmask);
7419                 return;
7420         }
7421
7422         // box trace, performed as brush trace
7423         memset(trace, 0, sizeof(*trace));
7424         trace->fraction = 1;
7425         trace->hitsupercontentsmask = hitsupercontentsmask;
7426         segmentmins[0] = min(start->mins[0], end->mins[0]) - 1;
7427         segmentmins[1] = min(start->mins[1], end->mins[1]) - 1;
7428         segmentmins[2] = min(start->mins[2], end->mins[2]) - 1;
7429         segmentmaxs[0] = max(start->maxs[0], end->maxs[0]) + 1;
7430         segmentmaxs[1] = max(start->maxs[1], end->maxs[1]) + 1;
7431         segmentmaxs[2] = max(start->maxs[2], end->maxs[2]) + 1;
7432         if (mod_collision_bih.integer)
7433                 Mod_CollisionBIH_TraceBrush(model, frameblend, skeleton, trace, start, end, hitsupercontentsmask);
7434         else if (model->brush.submodel)
7435         {
7436                 for (i = 0, brush = model->brush.data_brushes + model->firstmodelbrush;i < model->nummodelbrushes;i++, brush++)
7437                         if (brush->colbrushf && BoxesOverlap(segmentmins, segmentmaxs, brush->colbrushf->mins, brush->colbrushf->maxs))
7438                                 Collision_TraceBrushBrushFloat(trace, start, end, brush->colbrushf, brush->colbrushf);
7439                 if (mod_q3bsp_curves_collisions.integer)
7440                         for (i = 0, surface = model->data_surfaces + model->firstmodelsurface;i < model->nummodelsurfaces;i++, surface++)
7441                                 if (surface->num_collisiontriangles && BoxesOverlap(segmentmins, segmentmaxs, surface->mins, surface->maxs))
7442                                         Collision_TraceBrushTriangleMeshFloat(trace, start, end, surface->num_collisiontriangles, surface->deprecatedq3data_collisionelement3i, surface->deprecatedq3data_collisionvertex3f, surface->deprecatedq3num_collisionbboxstride, surface->deprecatedq3data_collisionbbox6f, surface->texture->supercontents, surface->texture->surfaceflags, surface->texture, segmentmins, segmentmaxs);
7443         }
7444         else
7445                 Mod_Q3BSP_TraceBrush_RecursiveBSPNode(trace, model, model->brush.data_nodes, start, end, ++markframe, segmentmins, segmentmaxs);
7446 }
7447
7448 static void Mod_Q3BSP_TraceBox(dp_model_t *model, const frameblend_t *frameblend, const skeleton_t *skeleton, trace_t *trace, const vec3_t start, const vec3_t boxmins, const vec3_t boxmaxs, const vec3_t end, int hitsupercontentsmask)
7449 {
7450         colboxbrushf_t thisbrush_start, thisbrush_end;
7451         vec3_t boxstartmins, boxstartmaxs, boxendmins, boxendmaxs;
7452
7453         // box trace, performed as brush trace
7454         VectorAdd(start, boxmins, boxstartmins);
7455         VectorAdd(start, boxmaxs, boxstartmaxs);
7456         VectorAdd(end, boxmins, boxendmins);
7457         VectorAdd(end, boxmaxs, boxendmaxs);
7458         Collision_BrushForBox(&thisbrush_start, boxstartmins, boxstartmaxs, 0, 0, NULL);
7459         Collision_BrushForBox(&thisbrush_end, boxendmins, boxendmaxs, 0, 0, NULL);
7460         Mod_Q3BSP_TraceBrush(model, frameblend, skeleton, trace, &thisbrush_start.brush, &thisbrush_end.brush, hitsupercontentsmask);
7461 }
7462
7463 static int Mod_Q3BSP_PointSuperContents(struct model_s *model, int frame, const vec3_t point)
7464 {
7465         int i;
7466         int supercontents = 0;
7467         q3mbrush_t *brush;
7468         if (mod_collision_bih.integer)
7469         {
7470                 supercontents = Mod_CollisionBIH_PointSuperContents(model, frame, point);
7471         }
7472         // test if the point is inside each brush
7473         else if (model->brush.submodel)
7474         {
7475                 // submodels are effectively one leaf
7476                 for (i = 0, brush = model->brush.data_brushes + model->firstmodelbrush;i < model->nummodelbrushes;i++, brush++)
7477                         if (brush->colbrushf && Collision_PointInsideBrushFloat(point, brush->colbrushf))
7478                                 supercontents |= brush->colbrushf->supercontents;
7479         }
7480         else
7481         {
7482                 mnode_t *node = model->brush.data_nodes;
7483                 mleaf_t *leaf;
7484                 // find which leaf the point is in
7485                 while (node->plane)
7486                         node = node->children[(node->plane->type < 3 ? point[node->plane->type] : DotProduct(point, node->plane->normal)) < node->plane->dist];
7487                 leaf = (mleaf_t *)node;
7488                 // now check the brushes in the leaf
7489                 for (i = 0;i < leaf->numleafbrushes;i++)
7490                 {
7491                         brush = model->brush.data_brushes + leaf->firstleafbrush[i];
7492                         if (brush->colbrushf && Collision_PointInsideBrushFloat(point, brush->colbrushf))
7493                                 supercontents |= brush->colbrushf->supercontents;
7494                 }
7495         }
7496         return supercontents;
7497 }
7498
7499 void Mod_CollisionBIH_TraceLineAgainstSurfaces(dp_model_t *model, const frameblend_t *frameblend, const skeleton_t *skeleton, trace_t *trace, const vec3_t start, const vec3_t end, int hitsupercontentsmask)
7500 {
7501         Mod_CollisionBIH_TraceLineShared(model, frameblend, skeleton, trace, start, end, hitsupercontentsmask, &model->render_bih);
7502 }
7503
7504
7505 bih_t *Mod_MakeCollisionBIH(dp_model_t *model, qboolean userendersurfaces, bih_t *out)
7506 {
7507         int j;
7508         int bihnumleafs;
7509         int bihmaxnodes;
7510         int brushindex;
7511         int triangleindex;
7512         int bihleafindex;
7513         int nummodelbrushes = model->nummodelbrushes;
7514         int nummodelsurfaces = model->nummodelsurfaces;
7515         const int *e;
7516         const int *collisionelement3i;
7517         const float *collisionvertex3f;
7518         const int *renderelement3i;
7519         const float *rendervertex3f;
7520         bih_leaf_t *bihleafs;
7521         bih_node_t *bihnodes;
7522         int *temp_leafsort;
7523         int *temp_leafsortscratch;
7524         const msurface_t *surface;
7525         const q3mbrush_t *brush;
7526
7527         // find out how many BIH leaf nodes we need
7528         bihnumleafs = 0;
7529         if (userendersurfaces)
7530         {
7531                 for (j = 0, surface = model->data_surfaces + model->firstmodelsurface;j < nummodelsurfaces;j++, surface++)
7532                         bihnumleafs += surface->num_triangles;
7533         }
7534         else
7535         {
7536                 for (brushindex = 0, brush = model->brush.data_brushes + brushindex+model->firstmodelbrush;brushindex < nummodelbrushes;brushindex++, brush++)
7537                         if (brush->colbrushf)
7538                                 bihnumleafs++;
7539                 for (j = 0, surface = model->data_surfaces + model->firstmodelsurface;j < nummodelsurfaces;j++, surface++)
7540                 {
7541                         if (surface->texture->basematerialflags & MATERIALFLAG_MESHCOLLISIONS)
7542                                 bihnumleafs += surface->num_triangles + surface->num_collisiontriangles;
7543                         else
7544                                 bihnumleafs += surface->num_collisiontriangles;
7545                 }
7546         }
7547
7548         if (!bihnumleafs)
7549                 return NULL;
7550
7551         // allocate the memory for the BIH leaf nodes
7552         bihleafs = (bih_leaf_t *)Mem_Alloc(loadmodel->mempool, sizeof(bih_leaf_t) * bihnumleafs);
7553
7554         // now populate the BIH leaf nodes
7555         bihleafindex = 0;
7556
7557         // add render surfaces
7558         renderelement3i = model->surfmesh.data_element3i;
7559         rendervertex3f = model->surfmesh.data_vertex3f;
7560         for (j = 0, surface = model->data_surfaces + model->firstmodelsurface;j < nummodelsurfaces;j++, surface++)
7561         {
7562                 for (triangleindex = 0, e = renderelement3i + 3*surface->num_firsttriangle;triangleindex < surface->num_triangles;triangleindex++, e += 3)
7563                 {
7564                         if (!userendersurfaces && !(surface->texture->basematerialflags & MATERIALFLAG_MESHCOLLISIONS))
7565                                 continue;
7566                         bihleafs[bihleafindex].type = BIH_RENDERTRIANGLE;
7567                         bihleafs[bihleafindex].textureindex = surface->texture - model->data_textures;
7568                         bihleafs[bihleafindex].surfaceindex = surface - model->data_surfaces;
7569                         bihleafs[bihleafindex].itemindex = triangleindex+surface->num_firsttriangle;
7570                         bihleafs[bihleafindex].mins[0] = min(rendervertex3f[3*e[0]+0], min(rendervertex3f[3*e[1]+0], rendervertex3f[3*e[2]+0])) - 1;
7571                         bihleafs[bihleafindex].mins[1] = min(rendervertex3f[3*e[0]+1], min(rendervertex3f[3*e[1]+1], rendervertex3f[3*e[2]+1])) - 1;
7572                         bihleafs[bihleafindex].mins[2] = min(rendervertex3f[3*e[0]+2], min(rendervertex3f[3*e[1]+2], rendervertex3f[3*e[2]+2])) - 1;
7573                         bihleafs[bihleafindex].maxs[0] = max(rendervertex3f[3*e[0]+0], max(rendervertex3f[3*e[1]+0], rendervertex3f[3*e[2]+0])) + 1;
7574                         bihleafs[bihleafindex].maxs[1] = max(rendervertex3f[3*e[0]+1], max(rendervertex3f[3*e[1]+1], rendervertex3f[3*e[2]+1])) + 1;
7575                         bihleafs[bihleafindex].maxs[2] = max(rendervertex3f[3*e[0]+2], max(rendervertex3f[3*e[1]+2], rendervertex3f[3*e[2]+2])) + 1;
7576                         bihleafindex++;
7577                 }
7578         }
7579
7580         if (!userendersurfaces)
7581         {
7582                 // add collision brushes
7583                 for (brushindex = 0, brush = model->brush.data_brushes + brushindex+model->firstmodelbrush;brushindex < nummodelbrushes;brushindex++, brush++)
7584                 {
7585                         if (!brush->colbrushf)
7586                                 continue;
7587                         bihleafs[bihleafindex].type = BIH_BRUSH;
7588                         bihleafs[bihleafindex].textureindex = brush->texture - model->data_textures;
7589                         bihleafs[bihleafindex].surfaceindex = -1;
7590                         bihleafs[bihleafindex].itemindex = brushindex+model->firstmodelbrush;
7591                         VectorCopy(brush->colbrushf->mins, bihleafs[bihleafindex].mins);
7592                         VectorCopy(brush->colbrushf->maxs, bihleafs[bihleafindex].maxs);
7593                         bihleafindex++;
7594                 }
7595
7596                 // add collision surfaces
7597                 collisionelement3i = model->brush.data_collisionelement3i;
7598                 collisionvertex3f = model->brush.data_collisionvertex3f;
7599                 for (j = 0, surface = model->data_surfaces + model->firstmodelsurface;j < nummodelsurfaces;j++, surface++)
7600                 {
7601                         for (triangleindex = 0, e = collisionelement3i + 3*surface->num_firstcollisiontriangle;triangleindex < surface->num_collisiontriangles;triangleindex++, e += 3)
7602                         {
7603                                 bihleafs[bihleafindex].type = BIH_COLLISIONTRIANGLE;
7604                                 bihleafs[bihleafindex].textureindex = surface->texture - model->data_textures;
7605                                 bihleafs[bihleafindex].surfaceindex = surface - model->data_surfaces;
7606                                 bihleafs[bihleafindex].itemindex = triangleindex+surface->num_firstcollisiontriangle;
7607                                 bihleafs[bihleafindex].mins[0] = min(collisionvertex3f[3*e[0]+0], min(collisionvertex3f[3*e[1]+0], collisionvertex3f[3*e[2]+0])) - 1;
7608                                 bihleafs[bihleafindex].mins[1] = min(collisionvertex3f[3*e[0]+1], min(collisionvertex3f[3*e[1]+1], collisionvertex3f[3*e[2]+1])) - 1;
7609                                 bihleafs[bihleafindex].mins[2] = min(collisionvertex3f[3*e[0]+2], min(collisionvertex3f[3*e[1]+2], collisionvertex3f[3*e[2]+2])) - 1;
7610                                 bihleafs[bihleafindex].maxs[0] = max(collisionvertex3f[3*e[0]+0], max(collisionvertex3f[3*e[1]+0], collisionvertex3f[3*e[2]+0])) + 1;
7611                                 bihleafs[bihleafindex].maxs[1] = max(collisionvertex3f[3*e[0]+1], max(collisionvertex3f[3*e[1]+1], collisionvertex3f[3*e[2]+1])) + 1;
7612                                 bihleafs[bihleafindex].maxs[2] = max(collisionvertex3f[3*e[0]+2], max(collisionvertex3f[3*e[1]+2], collisionvertex3f[3*e[2]+2])) + 1;
7613                                 bihleafindex++;
7614                         }
7615                 }
7616         }
7617
7618         // allocate buffers for the produced and temporary data
7619         bihmaxnodes = bihnumleafs + 1;
7620         bihnodes = (bih_node_t *)Mem_Alloc(loadmodel->mempool, sizeof(bih_node_t) * bihmaxnodes);
7621         temp_leafsort = (int *)Mem_Alloc(loadmodel->mempool, sizeof(int) * bihnumleafs * 2);
7622         temp_leafsortscratch = temp_leafsort + bihnumleafs;
7623
7624         // now build it
7625         BIH_Build(out, bihnumleafs, bihleafs, bihmaxnodes, bihnodes, temp_leafsort, temp_leafsortscratch);
7626
7627         // we're done with the temporary data
7628         Mem_Free(temp_leafsort);
7629
7630         // resize the BIH nodes array if it over-allocated
7631         if (out->maxnodes > out->numnodes)
7632         {
7633                 out->maxnodes = out->numnodes;
7634                 out->nodes = (bih_node_t *)Mem_Realloc(loadmodel->mempool, out->nodes, out->numnodes * sizeof(bih_node_t));
7635         }
7636
7637         return out;
7638 }
7639
7640 static int Mod_Q3BSP_SuperContentsFromNativeContents(dp_model_t *model, int nativecontents)
7641 {
7642         int supercontents = 0;
7643         if (nativecontents & CONTENTSQ3_SOLID)
7644                 supercontents |= SUPERCONTENTS_SOLID;
7645         if (nativecontents & CONTENTSQ3_WATER)
7646                 supercontents |= SUPERCONTENTS_WATER;
7647         if (nativecontents & CONTENTSQ3_SLIME)
7648                 supercontents |= SUPERCONTENTS_SLIME;
7649         if (nativecontents & CONTENTSQ3_LAVA)
7650                 supercontents |= SUPERCONTENTS_LAVA;
7651         if (nativecontents & CONTENTSQ3_BODY)
7652                 supercontents |= SUPERCONTENTS_BODY;
7653         if (nativecontents & CONTENTSQ3_CORPSE)
7654                 supercontents |= SUPERCONTENTS_CORPSE;
7655         if (nativecontents & CONTENTSQ3_NODROP)
7656                 supercontents |= SUPERCONTENTS_NODROP;
7657         if (nativecontents & CONTENTSQ3_PLAYERCLIP)
7658                 supercontents |= SUPERCONTENTS_PLAYERCLIP;
7659         if (nativecontents & CONTENTSQ3_MONSTERCLIP)
7660                 supercontents |= SUPERCONTENTS_MONSTERCLIP;
7661         if (nativecontents & CONTENTSQ3_DONOTENTER)
7662                 supercontents |= SUPERCONTENTS_DONOTENTER;
7663         if (nativecontents & CONTENTSQ3_BOTCLIP)
7664                 supercontents |= SUPERCONTENTS_BOTCLIP;
7665         if (!(nativecontents & CONTENTSQ3_TRANSLUCENT))
7666                 supercontents |= SUPERCONTENTS_OPAQUE;
7667         return supercontents;
7668 }
7669
7670 static int Mod_Q3BSP_NativeContentsFromSuperContents(dp_model_t *model, int supercontents)
7671 {
7672         int nativecontents = 0;
7673         if (supercontents & SUPERCONTENTS_SOLID)
7674                 nativecontents |= CONTENTSQ3_SOLID;
7675         if (supercontents & SUPERCONTENTS_WATER)
7676                 nativecontents |= CONTENTSQ3_WATER;
7677         if (supercontents & SUPERCONTENTS_SLIME)
7678                 nativecontents |= CONTENTSQ3_SLIME;
7679         if (supercontents & SUPERCONTENTS_LAVA)
7680                 nativecontents |= CONTENTSQ3_LAVA;
7681         if (supercontents & SUPERCONTENTS_BODY)
7682                 nativecontents |= CONTENTSQ3_BODY;
7683         if (supercontents & SUPERCONTENTS_CORPSE)
7684                 nativecontents |= CONTENTSQ3_CORPSE;
7685         if (supercontents & SUPERCONTENTS_NODROP)
7686                 nativecontents |= CONTENTSQ3_NODROP;
7687         if (supercontents & SUPERCONTENTS_PLAYERCLIP)
7688                 nativecontents |= CONTENTSQ3_PLAYERCLIP;
7689         if (supercontents & SUPERCONTENTS_MONSTERCLIP)
7690                 nativecontents |= CONTENTSQ3_MONSTERCLIP;
7691         if (supercontents & SUPERCONTENTS_DONOTENTER)
7692                 nativecontents |= CONTENTSQ3_DONOTENTER;
7693         if (supercontents & SUPERCONTENTS_BOTCLIP)
7694                 nativecontents |= CONTENTSQ3_BOTCLIP;
7695         if (!(supercontents & SUPERCONTENTS_OPAQUE))
7696                 nativecontents |= CONTENTSQ3_TRANSLUCENT;
7697         return nativecontents;
7698 }
7699
7700 static void Mod_Q3BSP_RecursiveFindNumLeafs(mnode_t *node)
7701 {
7702         int numleafs;
7703         while (node->plane)
7704         {
7705                 Mod_Q3BSP_RecursiveFindNumLeafs(node->children[0]);
7706                 node = node->children[1];
7707         }
7708         numleafs = ((mleaf_t *)node - loadmodel->brush.data_leafs) + 1;
7709         if (loadmodel->brush.num_leafs < numleafs)
7710                 loadmodel->brush.num_leafs = numleafs;
7711 }
7712
7713 static void Mod_Q3BSP_Load(dp_model_t *mod, void *buffer, void *bufferend)
7714 {
7715         int i, j, lumps;
7716         q3dheader_t *header;
7717         float corner[3], yawradius, modelradius;
7718
7719         mod->modeldatatypestring = "Q3BSP";
7720
7721         mod->type = mod_brushq3;
7722         mod->brush.ishlbsp = false;
7723         mod->brush.isbsp2rmqe = false;
7724         mod->brush.isbsp2 = false;
7725         mod->brush.isq2bsp = false;
7726         mod->brush.isq3bsp = true;
7727         mod->numframes = 2; // although alternate textures are not supported it is annoying to complain about no such frame 1
7728         mod->numskins = 1;
7729
7730         header = (q3dheader_t *)buffer;
7731         if((char *) bufferend < (char *) buffer + sizeof(q3dheader_t))
7732                 Host_Error("Mod_Q3BSP_Load: %s is smaller than its header", mod->name);
7733
7734         i = LittleLong(header->version);
7735         if (i != Q3BSPVERSION && i != Q3BSPVERSION_IG && i != Q3BSPVERSION_LIVE)
7736                 Host_Error("Mod_Q3BSP_Load: %s has wrong version number (%i, should be %i)", mod->name, i, Q3BSPVERSION);
7737
7738         mod->soundfromcenter = true;
7739         mod->TraceBox = Mod_Q3BSP_TraceBox;
7740         mod->TraceBrush = Mod_Q3BSP_TraceBrush;
7741         mod->TraceLine = Mod_Q3BSP_TraceLine;
7742         mod->TracePoint = Mod_Q3BSP_TracePoint;
7743         mod->PointSuperContents = Mod_Q3BSP_PointSuperContents;
7744         mod->TraceLineAgainstSurfaces = Mod_CollisionBIH_TraceLine;
7745         mod->brush.TraceLineOfSight = Mod_Q3BSP_TraceLineOfSight;
7746         mod->brush.SuperContentsFromNativeContents = Mod_Q3BSP_SuperContentsFromNativeContents;
7747         mod->brush.NativeContentsFromSuperContents = Mod_Q3BSP_NativeContentsFromSuperContents;
7748         mod->brush.GetPVS = Mod_Q1BSP_GetPVS;
7749         mod->brush.FatPVS = Mod_Q1BSP_FatPVS;
7750         mod->brush.BoxTouchingPVS = Mod_Q1BSP_BoxTouchingPVS;
7751         mod->brush.BoxTouchingLeafPVS = Mod_Q1BSP_BoxTouchingLeafPVS;
7752         mod->brush.BoxTouchingVisibleLeafs = Mod_Q1BSP_BoxTouchingVisibleLeafs;
7753         mod->brush.FindBoxClusters = Mod_Q1BSP_FindBoxClusters;
7754         mod->brush.LightPoint = Mod_Q3BSP_LightPoint;
7755         mod->brush.FindNonSolidLocation = Mod_Q1BSP_FindNonSolidLocation;
7756         mod->brush.AmbientSoundLevelsForPoint = NULL;
7757         mod->brush.RoundUpToHullSize = NULL;
7758         mod->brush.PointInLeaf = Mod_Q1BSP_PointInLeaf;
7759         mod->Draw = R_Q1BSP_Draw;
7760         mod->DrawDepth = R_Q1BSP_DrawDepth;
7761         mod->DrawDebug = R_Q1BSP_DrawDebug;
7762         mod->DrawPrepass = R_Q1BSP_DrawPrepass;
7763         mod->GetLightInfo = R_Q1BSP_GetLightInfo;
7764         mod->CompileShadowMap = R_Q1BSP_CompileShadowMap;
7765         mod->DrawShadowMap = R_Q1BSP_DrawShadowMap;
7766         mod->CompileShadowVolume = R_Q1BSP_CompileShadowVolume;
7767         mod->DrawShadowVolume = R_Q1BSP_DrawShadowVolume;
7768         mod->DrawLight = R_Q1BSP_DrawLight;
7769
7770         mod_base = (unsigned char *)header;
7771
7772         // swap all the lumps
7773         header->ident = LittleLong(header->ident);
7774         header->version = LittleLong(header->version);
7775         lumps = (header->version == Q3BSPVERSION_LIVE) ? Q3HEADER_LUMPS_LIVE : Q3HEADER_LUMPS;
7776         for (i = 0;i < lumps;i++)
7777         {
7778                 j = (header->lumps[i].fileofs = LittleLong(header->lumps[i].fileofs));
7779                 if((char *) bufferend < (char *) buffer + j)
7780                         Host_Error("Mod_Q3BSP_Load: %s has a lump that starts outside the file!", mod->name);
7781                 j += (header->lumps[i].filelen = LittleLong(header->lumps[i].filelen));
7782                 if((char *) bufferend < (char *) buffer + j)
7783                         Host_Error("Mod_Q3BSP_Load: %s has a lump that ends outside the file!", mod->name);
7784         }
7785         /*
7786          * NO, do NOT clear them!
7787          * they contain actual data referenced by other stuff.
7788          * Instead, before using the advertisements lump, check header->versio
7789          * again!
7790          * Sorry, but otherwise it breaks memory of the first lump.
7791         for (i = lumps;i < Q3HEADER_LUMPS_MAX;i++)
7792         {
7793                 header->lumps[i].fileofs = 0;
7794                 header->lumps[i].filelen = 0;
7795         }
7796         */
7797
7798         mod->brush.qw_md4sum = 0;
7799         mod->brush.qw_md4sum2 = 0;
7800         for (i = 0;i < lumps;i++)
7801         {
7802                 if (i == Q3LUMP_ENTITIES)
7803                         continue;
7804                 mod->brush.qw_md4sum ^= Com_BlockChecksum(mod_base + header->lumps[i].fileofs, header->lumps[i].filelen);
7805                 if (i == Q3LUMP_PVS || i == Q3LUMP_LEAFS || i == Q3LUMP_NODES)
7806                         continue;
7807                 mod->brush.qw_md4sum2 ^= Com_BlockChecksum(mod_base + header->lumps[i].fileofs, header->lumps[i].filelen);
7808
7809                 // all this checksumming can take a while, so let's send keepalives here too
7810                 CL_KeepaliveMessage(false);
7811         }
7812
7813         Mod_Q3BSP_LoadEntities(&header->lumps[Q3LUMP_ENTITIES]);
7814         Mod_Q3BSP_LoadTextures(&header->lumps[Q3LUMP_TEXTURES]);
7815         Mod_Q3BSP_LoadPlanes(&header->lumps[Q3LUMP_PLANES]);
7816         if (header->version == Q3BSPVERSION_IG)
7817                 Mod_Q3BSP_LoadBrushSides_IG(&header->lumps[Q3LUMP_BRUSHSIDES]);
7818         else
7819                 Mod_Q3BSP_LoadBrushSides(&header->lumps[Q3LUMP_BRUSHSIDES]);
7820         Mod_Q3BSP_LoadBrushes(&header->lumps[Q3LUMP_BRUSHES]);
7821         Mod_Q3BSP_LoadEffects(&header->lumps[Q3LUMP_EFFECTS]);
7822         Mod_Q3BSP_LoadVertices(&header->lumps[Q3LUMP_VERTICES]);
7823         Mod_Q3BSP_LoadTriangles(&header->lumps[Q3LUMP_TRIANGLES]);
7824         Mod_Q3BSP_LoadLightmaps(&header->lumps[Q3LUMP_LIGHTMAPS], &header->lumps[Q3LUMP_FACES]);
7825         Mod_Q3BSP_LoadFaces(&header->lumps[Q3LUMP_FACES]);
7826         Mod_Q3BSP_LoadModels(&header->lumps[Q3LUMP_MODELS]);
7827         Mod_Q3BSP_LoadLeafBrushes(&header->lumps[Q3LUMP_LEAFBRUSHES]);
7828         Mod_Q3BSP_LoadLeafFaces(&header->lumps[Q3LUMP_LEAFFACES]);
7829         Mod_Q3BSP_LoadLeafs(&header->lumps[Q3LUMP_LEAFS]);
7830         Mod_Q3BSP_LoadNodes(&header->lumps[Q3LUMP_NODES]);
7831         Mod_Q3BSP_LoadLightGrid(&header->lumps[Q3LUMP_LIGHTGRID]);
7832         Mod_Q3BSP_LoadPVS(&header->lumps[Q3LUMP_PVS]);
7833         loadmodel->brush.numsubmodels = loadmodel->brushq3.num_models;
7834
7835         // the MakePortals code works fine on the q3bsp data as well
7836         if (mod_bsp_portalize.integer)
7837                 Mod_Q1BSP_MakePortals();
7838
7839         // FIXME: shader alpha should replace r_wateralpha support in q3bsp
7840         loadmodel->brush.supportwateralpha = true;
7841
7842         // make a single combined shadow mesh to allow optimized shadow volume creation
7843         Mod_Q1BSP_CreateShadowMesh(loadmodel);
7844
7845         loadmodel->brush.num_leafs = 0;
7846         Mod_Q3BSP_RecursiveFindNumLeafs(loadmodel->brush.data_nodes);
7847
7848         if (loadmodel->brush.numsubmodels)
7849                 loadmodel->brush.submodels = (dp_model_t **)Mem_Alloc(loadmodel->mempool, loadmodel->brush.numsubmodels * sizeof(dp_model_t *));
7850
7851         mod = loadmodel;
7852         for (i = 0;i < loadmodel->brush.numsubmodels;i++)
7853         {
7854                 if (i > 0)
7855                 {
7856                         char name[10];
7857                         // duplicate the basic information
7858                         dpsnprintf(name, sizeof(name), "*%i", i);
7859                         mod = Mod_FindName(name, loadmodel->name);
7860                         // copy the base model to this one
7861                         *mod = *loadmodel;
7862                         // rename the clone back to its proper name
7863                         strlcpy(mod->name, name, sizeof(mod->name));
7864                         mod->brush.parentmodel = loadmodel;
7865                         // textures and memory belong to the main model
7866                         mod->texturepool = NULL;
7867                         mod->mempool = NULL;
7868                         mod->brush.GetPVS = NULL;
7869                         mod->brush.FatPVS = NULL;
7870                         mod->brush.BoxTouchingPVS = NULL;
7871                         mod->brush.BoxTouchingLeafPVS = NULL;
7872                         mod->brush.BoxTouchingVisibleLeafs = NULL;
7873                         mod->brush.FindBoxClusters = NULL;
7874                         mod->brush.LightPoint = NULL;
7875                         mod->brush.AmbientSoundLevelsForPoint = NULL;
7876                 }
7877                 mod->brush.submodel = i;
7878                 if (loadmodel->brush.submodels)
7879                         loadmodel->brush.submodels[i] = mod;
7880
7881                 // make the model surface list (used by shadowing/lighting)
7882                 mod->firstmodelsurface = mod->brushq3.data_models[i].firstface;
7883                 mod->nummodelsurfaces = mod->brushq3.data_models[i].numfaces;
7884                 mod->firstmodelbrush = mod->brushq3.data_models[i].firstbrush;
7885                 mod->nummodelbrushes = mod->brushq3.data_models[i].numbrushes;
7886                 mod->sortedmodelsurfaces = (int *)Mem_Alloc(loadmodel->mempool, mod->nummodelsurfaces * sizeof(*mod->sortedmodelsurfaces));
7887                 Mod_MakeSortedSurfaces(mod);
7888
7889                 VectorCopy(mod->brushq3.data_models[i].mins, mod->normalmins);
7890                 VectorCopy(mod->brushq3.data_models[i].maxs, mod->normalmaxs);
7891                 // enlarge the bounding box to enclose all geometry of this model,
7892                 // because q3map2 sometimes lies (mostly to affect the lightgrid),
7893                 // which can in turn mess up the farclip (as well as culling when
7894                 // outside the level - an unimportant concern)
7895
7896                 //printf("Editing model %d... BEFORE re-bounding: %f %f %f - %f %f %f\n", i, mod->normalmins[0], mod->normalmins[1], mod->normalmins[2], mod->normalmaxs[0], mod->normalmaxs[1], mod->normalmaxs[2]);
7897                 for (j = 0;j < mod->nummodelsurfaces;j++)
7898                 {
7899                         const msurface_t *surface = mod->data_surfaces + j + mod->firstmodelsurface;
7900                         const float *v = mod->surfmesh.data_vertex3f + 3 * surface->num_firstvertex;
7901                         int k;
7902                         if (!surface->num_vertices)
7903                                 continue;
7904                         for (k = 0;k < surface->num_vertices;k++, v += 3)
7905                         {
7906                                 mod->normalmins[0] = min(mod->normalmins[0], v[0]);
7907                                 mod->normalmins[1] = min(mod->normalmins[1], v[1]);
7908                                 mod->normalmins[2] = min(mod->normalmins[2], v[2]);
7909                                 mod->normalmaxs[0] = max(mod->normalmaxs[0], v[0]);
7910                                 mod->normalmaxs[1] = max(mod->normalmaxs[1], v[1]);
7911                                 mod->normalmaxs[2] = max(mod->normalmaxs[2], v[2]);
7912                         }
7913                 }
7914                 //printf("Editing model %d... AFTER re-bounding: %f %f %f - %f %f %f\n", i, mod->normalmins[0], mod->normalmins[1], mod->normalmins[2], mod->normalmaxs[0], mod->normalmaxs[1], mod->normalmaxs[2]);
7915                 corner[0] = max(fabs(mod->normalmins[0]), fabs(mod->normalmaxs[0]));
7916                 corner[1] = max(fabs(mod->normalmins[1]), fabs(mod->normalmaxs[1]));
7917                 corner[2] = max(fabs(mod->normalmins[2]), fabs(mod->normalmaxs[2]));
7918                 modelradius = sqrt(corner[0]*corner[0]+corner[1]*corner[1]+corner[2]*corner[2]);
7919                 yawradius = sqrt(corner[0]*corner[0]+corner[1]*corner[1]);
7920                 mod->rotatedmins[0] = mod->rotatedmins[1] = mod->rotatedmins[2] = -modelradius;
7921                 mod->rotatedmaxs[0] = mod->rotatedmaxs[1] = mod->rotatedmaxs[2] = modelradius;
7922                 mod->yawmaxs[0] = mod->yawmaxs[1] = yawradius;
7923                 mod->yawmins[0] = mod->yawmins[1] = -yawradius;
7924                 mod->yawmins[2] = mod->normalmins[2];
7925                 mod->yawmaxs[2] = mod->normalmaxs[2];
7926                 mod->radius = modelradius;
7927                 mod->radius2 = modelradius * modelradius;
7928
7929                 // this gets altered below if sky or water is used
7930                 mod->DrawSky = NULL;
7931                 mod->DrawAddWaterPlanes = NULL;
7932
7933                 for (j = 0;j < mod->nummodelsurfaces;j++)
7934                         if (mod->data_surfaces[j + mod->firstmodelsurface].texture->basematerialflags & MATERIALFLAG_SKY)
7935                                 break;
7936                 if (j < mod->nummodelsurfaces)
7937                         mod->DrawSky = R_Q1BSP_DrawSky;
7938
7939                 for (j = 0;j < mod->nummodelsurfaces;j++)
7940                         if (mod->data_surfaces[j + mod->firstmodelsurface].texture->basematerialflags & (MATERIALFLAG_WATERSHADER | MATERIALFLAG_REFRACTION | MATERIALFLAG_REFLECTION | MATERIALFLAG_CAMERA))
7941                                 break;
7942                 if (j < mod->nummodelsurfaces)
7943                         mod->DrawAddWaterPlanes = R_Q1BSP_DrawAddWaterPlanes;
7944
7945                 Mod_MakeCollisionBIH(mod, false, &mod->collision_bih);
7946                 Mod_MakeCollisionBIH(mod, true, &mod->render_bih);
7947
7948                 // generate VBOs and other shared data before cloning submodels
7949                 if (i == 0)
7950                         Mod_BuildVBOs();
7951         }
7952
7953         if (mod_q3bsp_sRGBlightmaps.integer)
7954         {
7955                 if (vid_sRGB.integer && vid_sRGB_fallback.integer && !vid.sRGB3D)
7956                 {
7957                         // actually we do in sRGB fallback with sRGB lightmaps: Image_sRGBFloatFromLinear_Lightmap(Image_LinearFloatFromsRGBFloat(x))
7958                         // neutral point is at Image_sRGBFloatFromLinearFloat(0.5)
7959                         // so we need to map Image_sRGBFloatFromLinearFloat(0.5) to 0.5
7960                         // factor is 0.5 / Image_sRGBFloatFromLinearFloat(0.5)
7961                         //loadmodel->lightmapscale *= 0.679942f; // fixes neutral level
7962                 }
7963                 else // if this is NOT set, regular rendering looks right by this requirement anyway
7964                 {
7965                         /*
7966                         // we want color 1 to do the same as without sRGB
7967                         // so, we want to map 1 to Image_LinearFloatFromsRGBFloat(2) instead of to 2
7968                         loadmodel->lightmapscale *= 2.476923f; // fixes max level
7969                         */
7970
7971                         // neutral level 0.5 gets uploaded as sRGB and becomes Image_LinearFloatFromsRGBFloat(0.5)
7972                         // we need to undo that
7973                         loadmodel->lightmapscale *= 2.336f; // fixes neutral level
7974                 }
7975         }
7976
7977         Con_DPrintf("Stats for q3bsp model \"%s\": %i faces, %i nodes, %i leafs, %i clusters, %i clusterportals, mesh: %i vertices, %i triangles, %i surfaces\n", loadmodel->name, loadmodel->num_surfaces, loadmodel->brush.num_nodes, loadmodel->brush.num_leafs, mod->brush.num_pvsclusters, loadmodel->brush.num_portals, loadmodel->surfmesh.num_vertices, loadmodel->surfmesh.num_triangles, loadmodel->num_surfaces);
7978 }
7979
7980 void Mod_IBSP_Load(dp_model_t *mod, void *buffer, void *bufferend)
7981 {
7982         int i = LittleLong(((int *)buffer)[1]);
7983         if (i == Q3BSPVERSION || i == Q3BSPVERSION_IG || i == Q3BSPVERSION_LIVE)
7984                 Mod_Q3BSP_Load(mod,buffer, bufferend);
7985         else if (i == Q2BSPVERSION)
7986                 Mod_Q2BSP_Load(mod,buffer, bufferend);
7987         else
7988                 Host_Error("Mod_IBSP_Load: unknown/unsupported version %i", i);
7989 }
7990
7991 void Mod_MAP_Load(dp_model_t *mod, void *buffer, void *bufferend)
7992 {
7993         Host_Error("Mod_MAP_Load: not yet implemented");
7994 }
7995
7996 typedef struct objvertex_s
7997 {
7998         int nextindex;
7999         int submodelindex;
8000         int textureindex;
8001         float v[3];
8002         float vt[2];
8003         float vn[3];
8004 }
8005 objvertex_t;
8006
8007 static unsigned char nobsp_pvs[1] = {1};
8008
8009 void Mod_OBJ_Load(dp_model_t *mod, void *buffer, void *bufferend)
8010 {
8011         const char *textbase = (char *)buffer, *text = textbase;
8012         char *s;
8013         char *argv[512];
8014         char line[1024];
8015         char materialname[MAX_QPATH];
8016         int i, j, l, numvertices, firstvertex, firsttriangle, elementindex, vertexindex, surfacevertices, surfacetriangles, surfaceelements, submodelindex = 0;
8017         int index1, index2, index3;
8018         objvertex_t vfirst, vprev, vcurrent;
8019         int argc;
8020         int linelen;
8021         int numtriangles = 0;
8022         int maxtriangles = 0;
8023         objvertex_t *vertices = NULL;
8024         int linenumber = 0;
8025         int maxtextures = 0, numtextures = 0, textureindex = 0;
8026         int maxv = 0, numv = 1;
8027         int maxvt = 0, numvt = 1;
8028         int maxvn = 0, numvn = 1;
8029         char *texturenames = NULL;
8030         float dist, modelradius, modelyawradius, yawradius;
8031         float *obj_v = NULL;
8032         float *obj_vt = NULL;
8033         float *obj_vn = NULL;
8034         float mins[3];
8035         float maxs[3];
8036         float corner[3];
8037         objvertex_t *thisvertex = NULL;
8038         int vertexhashindex;
8039         int *vertexhashtable = NULL;
8040         objvertex_t *vertexhashdata = NULL;
8041         objvertex_t *vdata = NULL;
8042         int vertexhashsize = 0;
8043         int vertexhashcount = 0;
8044         skinfile_t *skinfiles = NULL;
8045         unsigned char *data = NULL;
8046         int *submodelfirstsurface;
8047         msurface_t *tempsurface;
8048         msurface_t *tempsurfaces;
8049
8050         memset(&vfirst, 0, sizeof(vfirst));
8051         memset(&vprev, 0, sizeof(vprev));
8052         memset(&vcurrent, 0, sizeof(vcurrent));
8053
8054         dpsnprintf(materialname, sizeof(materialname), "%s", loadmodel->name);
8055
8056         loadmodel->modeldatatypestring = "OBJ";
8057
8058         loadmodel->type = mod_obj;
8059         loadmodel->soundfromcenter = true;
8060         loadmodel->TraceBox = Mod_CollisionBIH_TraceBox;
8061         loadmodel->TraceBrush = Mod_CollisionBIH_TraceBrush;
8062         loadmodel->TraceLine = Mod_CollisionBIH_TraceLine;
8063         loadmodel->TracePoint = Mod_CollisionBIH_TracePoint_Mesh;
8064         loadmodel->TraceLineAgainstSurfaces = Mod_CollisionBIH_TraceLine;
8065         loadmodel->PointSuperContents = Mod_CollisionBIH_PointSuperContents_Mesh;
8066         loadmodel->brush.TraceLineOfSight = NULL;
8067         loadmodel->brush.SuperContentsFromNativeContents = NULL;
8068         loadmodel->brush.NativeContentsFromSuperContents = NULL;
8069         loadmodel->brush.GetPVS = NULL;
8070         loadmodel->brush.FatPVS = NULL;
8071         loadmodel->brush.BoxTouchingPVS = NULL;
8072         loadmodel->brush.BoxTouchingLeafPVS = NULL;
8073         loadmodel->brush.BoxTouchingVisibleLeafs = NULL;
8074         loadmodel->brush.FindBoxClusters = NULL;
8075         loadmodel->brush.LightPoint = NULL;
8076         loadmodel->brush.FindNonSolidLocation = NULL;
8077         loadmodel->brush.AmbientSoundLevelsForPoint = NULL;
8078         loadmodel->brush.RoundUpToHullSize = NULL;
8079         loadmodel->brush.PointInLeaf = NULL;
8080         loadmodel->Draw = R_Q1BSP_Draw;
8081         loadmodel->DrawDepth = R_Q1BSP_DrawDepth;
8082         loadmodel->DrawDebug = R_Q1BSP_DrawDebug;
8083         loadmodel->DrawPrepass = R_Q1BSP_DrawPrepass;
8084         loadmodel->GetLightInfo = R_Q1BSP_GetLightInfo;
8085         loadmodel->CompileShadowMap = R_Q1BSP_CompileShadowMap;
8086         loadmodel->DrawShadowMap = R_Q1BSP_DrawShadowMap;
8087         loadmodel->CompileShadowVolume = R_Q1BSP_CompileShadowVolume;
8088         loadmodel->DrawShadowVolume = R_Q1BSP_DrawShadowVolume;
8089         loadmodel->DrawLight = R_Q1BSP_DrawLight;
8090
8091         skinfiles = Mod_LoadSkinFiles();
8092         if (loadmodel->numskins < 1)
8093                 loadmodel->numskins = 1;
8094
8095         // make skinscenes for the skins (no groups)
8096         loadmodel->skinscenes = (animscene_t *)Mem_Alloc(loadmodel->mempool, sizeof(animscene_t) * loadmodel->numskins);
8097         for (i = 0;i < loadmodel->numskins;i++)
8098         {
8099                 loadmodel->skinscenes[i].firstframe = i;
8100                 loadmodel->skinscenes[i].framecount = 1;
8101                 loadmodel->skinscenes[i].loop = true;
8102                 loadmodel->skinscenes[i].framerate = 10;
8103         }
8104
8105         VectorClear(mins);
8106         VectorClear(maxs);
8107
8108         // we always have model 0, i.e. the first "submodel"
8109         loadmodel->brush.numsubmodels = 1;
8110
8111         // parse the OBJ text now
8112         for(;;)
8113         {
8114                 static char emptyarg[1] = "";
8115                 if (!*text)
8116                         break;
8117                 linenumber++;
8118                 linelen = 0;
8119                 for (linelen = 0;text[linelen] && text[linelen] != '\r' && text[linelen] != '\n';linelen++)
8120                         line[linelen] = text[linelen];
8121                 line[linelen] = 0;
8122                 for (argc = 0;argc < 4;argc++)
8123                         argv[argc] = emptyarg;
8124                 argc = 0;
8125                 s = line;
8126                 while (*s == ' ' || *s == '\t')
8127                         s++;
8128                 while (*s)
8129                 {
8130                         argv[argc++] = s;
8131                         while (*s > ' ')
8132                                 s++;
8133                         if (!*s)
8134                                 break;
8135                         *s++ = 0;
8136                         while (*s == ' ' || *s == '\t')
8137                                 s++;
8138                 }
8139                 text += linelen;
8140                 if (*text == '\r')
8141                         text++;
8142                 if (*text == '\n')
8143                         text++;
8144                 if (!argc)
8145                         continue;
8146                 if (argv[0][0] == '#')
8147                         continue;
8148                 if (!strcmp(argv[0], "v"))
8149                 {
8150                         if (maxv <= numv)
8151                         {
8152                                 maxv = max(maxv * 2, 1024);
8153                                 obj_v = (float *)Mem_Realloc(tempmempool, obj_v, maxv * sizeof(float[3]));
8154                         }
8155                         if(mod_obj_orientation.integer)
8156                         {
8157                                 obj_v[numv*3+0] = atof(argv[1]);
8158                                 obj_v[numv*3+2] = atof(argv[2]);
8159                                 obj_v[numv*3+1] = atof(argv[3]);
8160                         }
8161                         else
8162                         {
8163                                 obj_v[numv*3+0] = atof(argv[1]);
8164                                 obj_v[numv*3+1] = atof(argv[2]);
8165                                 obj_v[numv*3+2] = atof(argv[3]);
8166                         }
8167                         numv++;
8168                 }
8169                 else if (!strcmp(argv[0], "vt"))
8170                 {
8171                         if (maxvt <= numvt)
8172                         {
8173                                 maxvt = max(maxvt * 2, 1024);
8174                                 obj_vt = (float *)Mem_Realloc(tempmempool, obj_vt, maxvt * sizeof(float[2]));
8175                         }
8176                         obj_vt[numvt*2+0] = atof(argv[1]);
8177                         obj_vt[numvt*2+1] = 1-atof(argv[2]);
8178                         numvt++;
8179                 }
8180                 else if (!strcmp(argv[0], "vn"))
8181                 {
8182                         if (maxvn <= numvn)
8183                         {
8184                                 maxvn = max(maxvn * 2, 1024);
8185                                 obj_vn = (float *)Mem_Realloc(tempmempool, obj_vn, maxvn * sizeof(float[3]));
8186                         }
8187                         if(mod_obj_orientation.integer)
8188                         {
8189                                 obj_vn[numvn*3+0] = atof(argv[1]);
8190                                 obj_vn[numvn*3+2] = atof(argv[2]);
8191                                 obj_vn[numvn*3+1] = atof(argv[3]);
8192                         }
8193                         else
8194                         {
8195                                 obj_vn[numvn*3+0] = atof(argv[1]);
8196                                 obj_vn[numvn*3+1] = atof(argv[2]);
8197                                 obj_vn[numvn*3+2] = atof(argv[3]);
8198                         }
8199                         numvn++;
8200                 }
8201                 else if (!strcmp(argv[0], "f"))
8202                 {
8203                         if (!numtextures)
8204                         {
8205                                 if (maxtextures <= numtextures)
8206                                 {
8207                                         maxtextures = max(maxtextures * 2, 256);
8208                                         texturenames = (char *)Mem_Realloc(loadmodel->mempool, texturenames, maxtextures * MAX_QPATH);
8209                                 }
8210                                 textureindex = numtextures++;
8211                                 strlcpy(texturenames + textureindex*MAX_QPATH, loadmodel->name, MAX_QPATH);
8212                         }
8213                         for (j = 1;j < argc;j++)
8214                         {
8215                                 index1 = atoi(argv[j]);
8216                                 while(argv[j][0] && argv[j][0] != '/')
8217                                         argv[j]++;
8218                                 if (argv[j][0])
8219                                         argv[j]++;
8220                                 index2 = atoi(argv[j]);
8221                                 while(argv[j][0] && argv[j][0] != '/')
8222                                         argv[j]++;
8223                                 if (argv[j][0])
8224                                         argv[j]++;
8225                                 index3 = atoi(argv[j]);
8226                                 // negative refers to a recent vertex
8227                                 // zero means not specified
8228                                 // positive means an absolute vertex index
8229                                 if (index1 < 0)
8230                                         index1 = numv - index1;
8231                                 if (index2 < 0)
8232                                         index2 = numvt - index2;
8233                                 if (index3 < 0)
8234                                         index3 = numvn - index3;
8235                                 vcurrent.nextindex = -1;
8236                                 vcurrent.textureindex = textureindex;
8237                                 vcurrent.submodelindex = submodelindex;
8238                                 if (obj_v && index1 >= 0 && index1 < numv)
8239                                         VectorCopy(obj_v + 3*index1, vcurrent.v);
8240                                 if (obj_vt && index2 >= 0 && index2 < numvt)
8241                                         Vector2Copy(obj_vt + 2*index2, vcurrent.vt);
8242                                 if (obj_vn && index3 >= 0 && index3 < numvn)
8243                                         VectorCopy(obj_vn + 3*index3, vcurrent.vn);
8244                                 if (numtriangles == 0)
8245                                 {
8246                                         VectorCopy(vcurrent.v, mins);
8247                                         VectorCopy(vcurrent.v, maxs);
8248                                 }
8249                                 else
8250                                 {
8251                                         mins[0] = min(mins[0], vcurrent.v[0]);
8252                                         mins[1] = min(mins[1], vcurrent.v[1]);
8253                                         mins[2] = min(mins[2], vcurrent.v[2]);
8254                                         maxs[0] = max(maxs[0], vcurrent.v[0]);
8255                                         maxs[1] = max(maxs[1], vcurrent.v[1]);
8256                                         maxs[2] = max(maxs[2], vcurrent.v[2]);
8257                                 }
8258                                 if (j == 1)
8259                                         vfirst = vcurrent;
8260                                 else if (j >= 3)
8261                                 {
8262                                         if (maxtriangles <= numtriangles)
8263                                         {
8264                                                 maxtriangles = max(maxtriangles * 2, 32768);
8265                                                 vertices = (objvertex_t*)Mem_Realloc(loadmodel->mempool, vertices, maxtriangles * sizeof(objvertex_t[3]));
8266                                         }
8267                                         if(mod_obj_orientation.integer)
8268                                         {
8269                                                 vertices[numtriangles*3+0] = vfirst;
8270                                                 vertices[numtriangles*3+1] = vprev;
8271                                                 vertices[numtriangles*3+2] = vcurrent;
8272                                         }
8273                                         else
8274                                         {
8275                                                 vertices[numtriangles*3+0] = vfirst;
8276                                                 vertices[numtriangles*3+2] = vprev;
8277                                                 vertices[numtriangles*3+1] = vcurrent;
8278                                         }
8279                                         numtriangles++;
8280                                 }
8281                                 vprev = vcurrent;
8282                         }
8283                 }
8284                 else if (!strcmp(argv[0], "o") || !strcmp(argv[0], "g"))
8285                 {
8286                         submodelindex = atof(argv[1]);
8287                         loadmodel->brush.numsubmodels = max(submodelindex + 1, loadmodel->brush.numsubmodels);
8288                 }
8289                 else if (!strcmp(argv[0], "usemtl"))
8290                 {
8291                         for (i = 0;i < numtextures;i++)
8292                                 if (!strcmp(texturenames+i*MAX_QPATH, argv[1]))
8293                                         break;
8294                         if (i < numtextures)
8295                                 textureindex = i;
8296                         else
8297                         {
8298                                 if (maxtextures <= numtextures)
8299                                 {
8300                                         maxtextures = max(maxtextures * 2, 256);
8301                                         texturenames = (char *)Mem_Realloc(loadmodel->mempool, texturenames, maxtextures * MAX_QPATH);
8302                                 }
8303                                 textureindex = numtextures++;
8304                                 strlcpy(texturenames + textureindex*MAX_QPATH, argv[1], MAX_QPATH);
8305                         }
8306                 }
8307         }
8308
8309         // now that we have the OBJ data loaded as-is, we can convert it
8310
8311         // copy the model bounds, then enlarge the yaw and rotated bounds according to radius
8312         VectorCopy(mins, loadmodel->normalmins);
8313         VectorCopy(maxs, loadmodel->normalmaxs);
8314         dist = max(fabs(loadmodel->normalmins[0]), fabs(loadmodel->normalmaxs[0]));
8315         modelyawradius = max(fabs(loadmodel->normalmins[1]), fabs(loadmodel->normalmaxs[1]));
8316         modelyawradius = dist*dist+modelyawradius*modelyawradius;
8317         modelradius = max(fabs(loadmodel->normalmins[2]), fabs(loadmodel->normalmaxs[2]));
8318         modelradius = modelyawradius + modelradius * modelradius;
8319         modelyawradius = sqrt(modelyawradius);
8320         modelradius = sqrt(modelradius);
8321         loadmodel->yawmins[0] = loadmodel->yawmins[1] = -modelyawradius;
8322         loadmodel->yawmins[2] = loadmodel->normalmins[2];
8323         loadmodel->yawmaxs[0] = loadmodel->yawmaxs[1] =  modelyawradius;
8324         loadmodel->yawmaxs[2] = loadmodel->normalmaxs[2];
8325         loadmodel->rotatedmins[0] = loadmodel->rotatedmins[1] = loadmodel->rotatedmins[2] = -modelradius;
8326         loadmodel->rotatedmaxs[0] = loadmodel->rotatedmaxs[1] = loadmodel->rotatedmaxs[2] =  modelradius;
8327         loadmodel->radius = modelradius;
8328         loadmodel->radius2 = modelradius * modelradius;
8329
8330         // allocate storage for triangles
8331         loadmodel->surfmesh.data_element3i = (int *)Mem_Alloc(loadmodel->mempool, numtriangles * sizeof(int[3]));
8332         // allocate vertex hash structures to build an optimal vertex subset
8333         vertexhashsize = numtriangles*2;
8334         vertexhashtable = (int *)Mem_Alloc(loadmodel->mempool, sizeof(int) * vertexhashsize);
8335         memset(vertexhashtable, 0xFF, sizeof(int) * vertexhashsize);
8336         vertexhashdata = (objvertex_t *)Mem_Alloc(loadmodel->mempool, sizeof(*vertexhashdata) * numtriangles*3);
8337         vertexhashcount = 0;
8338
8339         // gather surface stats for assigning vertex/triangle ranges
8340         firstvertex = 0;
8341         firsttriangle = 0;
8342         elementindex = 0;
8343         loadmodel->num_surfaces = 0;
8344         // allocate storage for the worst case number of surfaces, later we resize
8345         tempsurfaces = (msurface_t *)Mem_Alloc(loadmodel->mempool, numtextures * loadmodel->brush.numsubmodels * sizeof(msurface_t));
8346         submodelfirstsurface = (int *)Mem_Alloc(loadmodel->mempool, (loadmodel->brush.numsubmodels+1) * sizeof(int));
8347         tempsurface = tempsurfaces;
8348         for (submodelindex = 0;submodelindex < loadmodel->brush.numsubmodels;submodelindex++)
8349         {
8350                 submodelfirstsurface[submodelindex] = loadmodel->num_surfaces;
8351                 for (textureindex = 0;textureindex < numtextures;textureindex++)
8352                 {
8353                         for (vertexindex = 0;vertexindex < numtriangles*3;vertexindex++)
8354                         {
8355                                 thisvertex = vertices + vertexindex;
8356                                 if (thisvertex->submodelindex == submodelindex && thisvertex->textureindex == textureindex)
8357                                         break;
8358                         }
8359                         // skip the surface creation if there are no triangles for it
8360                         if (vertexindex == numtriangles*3)
8361                                 continue;
8362                         // create a surface for these vertices
8363                         surfacevertices = 0;
8364                         surfaceelements = 0;
8365                         // we hack in a texture index in the surface to be fixed up later...
8366                         tempsurface->texture = (texture_t *)((size_t)textureindex);
8367                         // calculate bounds as we go
8368                         VectorCopy(thisvertex->v, tempsurface->mins);
8369                         VectorCopy(thisvertex->v, tempsurface->maxs);
8370                         for (;vertexindex < numtriangles*3;vertexindex++)
8371                         {
8372                                 thisvertex = vertices + vertexindex;
8373                                 if (thisvertex->submodelindex != submodelindex)
8374                                         continue;
8375                                 if (thisvertex->textureindex != textureindex)
8376                                         continue;
8377                                 // add vertex to surface bounds
8378                                 tempsurface->mins[0] = min(tempsurface->mins[0], thisvertex->v[0]);
8379                                 tempsurface->mins[1] = min(tempsurface->mins[1], thisvertex->v[1]);
8380                                 tempsurface->mins[2] = min(tempsurface->mins[2], thisvertex->v[2]);
8381                                 tempsurface->maxs[0] = max(tempsurface->maxs[0], thisvertex->v[0]);
8382                                 tempsurface->maxs[1] = max(tempsurface->maxs[1], thisvertex->v[1]);
8383                                 tempsurface->maxs[2] = max(tempsurface->maxs[2], thisvertex->v[2]);
8384                                 // add the vertex if it is not found in the merged set, and
8385                                 // get its index (triangle element) for the surface
8386                                 vertexhashindex = (unsigned int)(thisvertex->v[0] * 3571 + thisvertex->v[0] * 1777 + thisvertex->v[0] * 457) % (unsigned int)vertexhashsize;
8387                                 for (i = vertexhashtable[vertexhashindex];i >= 0;i = vertexhashdata[i].nextindex)
8388                                 {
8389                                         vdata = vertexhashdata + i;
8390                                         if (vdata->submodelindex == thisvertex->submodelindex && vdata->textureindex == thisvertex->textureindex && VectorCompare(thisvertex->v, vdata->v) && VectorCompare(thisvertex->vn, vdata->vn) && Vector2Compare(thisvertex->vt, vdata->vt))
8391                                                 break;
8392                                 }
8393                                 if (i < 0)
8394                                 {
8395                                         i = vertexhashcount++;
8396                                         vdata = vertexhashdata + i;
8397                                         *vdata = *thisvertex;
8398                                         vdata->nextindex = vertexhashtable[vertexhashindex];
8399                                         vertexhashtable[vertexhashindex] = i;
8400                                         surfacevertices++;
8401                                 }
8402                                 loadmodel->surfmesh.data_element3i[elementindex++] = i;
8403                                 surfaceelements++;
8404                         }
8405                         surfacetriangles = surfaceelements / 3;
8406                         tempsurface->num_vertices = surfacevertices;
8407                         tempsurface->num_triangles = surfacetriangles;
8408                         tempsurface->num_firstvertex = firstvertex;
8409                         tempsurface->num_firsttriangle = firsttriangle;
8410                         firstvertex += tempsurface->num_vertices;
8411                         firsttriangle += tempsurface->num_triangles;
8412                         tempsurface++;
8413                         loadmodel->num_surfaces++;
8414                 }
8415         }
8416         submodelfirstsurface[submodelindex] = loadmodel->num_surfaces;
8417         numvertices = firstvertex;
8418         loadmodel->data_surfaces = (msurface_t *)Mem_Realloc(loadmodel->mempool, tempsurfaces, loadmodel->num_surfaces * sizeof(msurface_t));
8419         tempsurfaces = NULL;
8420
8421         // allocate storage for final mesh data
8422         loadmodel->num_textures = numtextures * loadmodel->numskins;
8423         loadmodel->num_texturesperskin = numtextures;
8424         data = (unsigned char *)Mem_Alloc(loadmodel->mempool, loadmodel->num_surfaces * sizeof(int) + loadmodel->num_surfaces * loadmodel->numskins * sizeof(texture_t) + numtriangles * sizeof(int[3]) + (numvertices <= 65536 ? numtriangles * sizeof(unsigned short[3]) : 0) + (r_enableshadowvolumes.integer ? numtriangles * sizeof(int[3]) : 0) + numvertices * sizeof(float[14]) + loadmodel->brush.numsubmodels * sizeof(dp_model_t *));
8425         loadmodel->brush.submodels = (dp_model_t **)data;data += loadmodel->brush.numsubmodels * sizeof(dp_model_t *);
8426         loadmodel->sortedmodelsurfaces = (int *)data;data += loadmodel->num_surfaces * sizeof(int);
8427         loadmodel->data_textures = (texture_t *)data;data += loadmodel->num_surfaces * loadmodel->numskins * sizeof(texture_t);
8428         loadmodel->surfmesh.num_vertices = numvertices;
8429         loadmodel->surfmesh.num_triangles = numtriangles;
8430         if (r_enableshadowvolumes.integer)
8431                 loadmodel->surfmesh.data_neighbor3i = (int *)data;data += numtriangles * sizeof(int[3]);
8432         loadmodel->surfmesh.data_vertex3f = (float *)data;data += numvertices * sizeof(float[3]);
8433         loadmodel->surfmesh.data_svector3f = (float *)data;data += numvertices * sizeof(float[3]);
8434         loadmodel->surfmesh.data_tvector3f = (float *)data;data += numvertices * sizeof(float[3]);
8435         loadmodel->surfmesh.data_normal3f = (float *)data;data += numvertices * sizeof(float[3]);
8436         loadmodel->surfmesh.data_texcoordtexture2f = (float *)data;data += numvertices * sizeof(float[2]);
8437         if (loadmodel->surfmesh.num_vertices <= 65536)
8438                 loadmodel->surfmesh.data_element3s = (unsigned short *)data;data += loadmodel->surfmesh.num_triangles * sizeof(unsigned short[3]);
8439
8440         for (j = 0;j < loadmodel->surfmesh.num_vertices;j++)
8441         {
8442                 VectorCopy(vertexhashdata[j].v, loadmodel->surfmesh.data_vertex3f + 3*j);
8443                 VectorCopy(vertexhashdata[j].vn, loadmodel->surfmesh.data_normal3f + 3*j);
8444                 Vector2Copy(vertexhashdata[j].vt, loadmodel->surfmesh.data_texcoordtexture2f + 2*j);
8445         }
8446
8447         // load the textures
8448         for (textureindex = 0;textureindex < numtextures;textureindex++)
8449                 Mod_BuildAliasSkinsFromSkinFiles(loadmodel->data_textures + textureindex, skinfiles, texturenames + textureindex*MAX_QPATH, texturenames + textureindex*MAX_QPATH);
8450         Mod_FreeSkinFiles(skinfiles);
8451
8452         // set the surface textures to their real values now that we loaded them...
8453         for (i = 0;i < loadmodel->num_surfaces;i++)
8454                 loadmodel->data_surfaces[i].texture = loadmodel->data_textures + (size_t)loadmodel->data_surfaces[i].texture;
8455
8456         // free data
8457         Mem_Free(vertices);
8458         Mem_Free(texturenames);
8459         Mem_Free(obj_v);
8460         Mem_Free(obj_vt);
8461         Mem_Free(obj_vn);
8462         Mem_Free(vertexhashtable);
8463         Mem_Free(vertexhashdata);
8464
8465         // make a single combined shadow mesh to allow optimized shadow volume creation
8466         Mod_Q1BSP_CreateShadowMesh(loadmodel);
8467
8468         // compute all the mesh information that was not loaded from the file
8469         if (loadmodel->surfmesh.data_element3s)
8470                 for (i = 0;i < loadmodel->surfmesh.num_triangles*3;i++)
8471                         loadmodel->surfmesh.data_element3s[i] = loadmodel->surfmesh.data_element3i[i];
8472         Mod_ValidateElements(loadmodel->surfmesh.data_element3i, loadmodel->surfmesh.num_triangles, 0, loadmodel->surfmesh.num_vertices, __FILE__, __LINE__);
8473         // generate normals if the file did not have them
8474         if (!VectorLength2(loadmodel->surfmesh.data_normal3f))
8475                 Mod_BuildNormals(0, loadmodel->surfmesh.num_vertices, loadmodel->surfmesh.num_triangles, loadmodel->surfmesh.data_vertex3f, loadmodel->surfmesh.data_element3i, loadmodel->surfmesh.data_normal3f, r_smoothnormals_areaweighting.integer != 0);
8476         Mod_BuildTextureVectorsFromNormals(0, loadmodel->surfmesh.num_vertices, loadmodel->surfmesh.num_triangles, loadmodel->surfmesh.data_vertex3f, loadmodel->surfmesh.data_texcoordtexture2f, loadmodel->surfmesh.data_normal3f, loadmodel->surfmesh.data_element3i, loadmodel->surfmesh.data_svector3f, loadmodel->surfmesh.data_tvector3f, r_smoothnormals_areaweighting.integer != 0);
8477         if (loadmodel->surfmesh.data_neighbor3i)
8478                 Mod_BuildTriangleNeighbors(loadmodel->surfmesh.data_neighbor3i, loadmodel->surfmesh.data_element3i, loadmodel->surfmesh.num_triangles);
8479
8480         // if this is a worldmodel and has no BSP tree, create a fake one for the purpose
8481         loadmodel->brush.num_visleafs = 1;
8482         loadmodel->brush.num_leafs = 1;
8483         loadmodel->brush.num_nodes = 0;
8484         loadmodel->brush.num_leafsurfaces = loadmodel->num_surfaces;
8485         loadmodel->brush.data_leafs = (mleaf_t *)Mem_Alloc(loadmodel->mempool, loadmodel->brush.num_leafs * sizeof(mleaf_t));
8486         loadmodel->brush.data_nodes = (mnode_t *)loadmodel->brush.data_leafs;
8487         loadmodel->brush.num_pvsclusters = 1;
8488         loadmodel->brush.num_pvsclusterbytes = 1;
8489         loadmodel->brush.data_pvsclusters = nobsp_pvs;
8490         //if (loadmodel->num_nodes) loadmodel->data_nodes = (mnode_t *)Mem_Alloc(loadmodel->mempool, loadmodel->num_nodes * sizeof(mnode_t));
8491         //loadmodel->data_leafsurfaces = (int *)Mem_Alloc(loadmodel->mempool, loadmodel->num_leafsurfaces * sizeof(int));
8492         loadmodel->brush.data_leafsurfaces = loadmodel->sortedmodelsurfaces;
8493         VectorCopy(loadmodel->normalmins, loadmodel->brush.data_leafs->mins);
8494         VectorCopy(loadmodel->normalmaxs, loadmodel->brush.data_leafs->maxs);
8495         loadmodel->brush.data_leafs->combinedsupercontents = 0; // FIXME?
8496         loadmodel->brush.data_leafs->clusterindex = 0;
8497         loadmodel->brush.data_leafs->areaindex = 0;
8498         loadmodel->brush.data_leafs->numleafsurfaces = loadmodel->brush.num_leafsurfaces;
8499         loadmodel->brush.data_leafs->firstleafsurface = loadmodel->brush.data_leafsurfaces;
8500         loadmodel->brush.data_leafs->numleafbrushes = 0;
8501         loadmodel->brush.data_leafs->firstleafbrush = NULL;
8502         loadmodel->brush.supportwateralpha = true;
8503
8504         if (loadmodel->brush.numsubmodels)
8505                 loadmodel->brush.submodels = (dp_model_t **)Mem_Alloc(loadmodel->mempool, loadmodel->brush.numsubmodels * sizeof(dp_model_t *));
8506
8507         mod = loadmodel;
8508         for (i = 0;i < loadmodel->brush.numsubmodels;i++)
8509         {
8510                 if (i > 0)
8511                 {
8512                         char name[10];
8513                         // duplicate the basic information
8514                         dpsnprintf(name, sizeof(name), "*%i", i);
8515                         mod = Mod_FindName(name, loadmodel->name);
8516                         // copy the base model to this one
8517                         *mod = *loadmodel;
8518                         // rename the clone back to its proper name
8519                         strlcpy(mod->name, name, sizeof(mod->name));
8520                         mod->brush.parentmodel = loadmodel;
8521                         // textures and memory belong to the main model
8522                         mod->texturepool = NULL;
8523                         mod->mempool = NULL;
8524                         mod->brush.GetPVS = NULL;
8525                         mod->brush.FatPVS = NULL;
8526                         mod->brush.BoxTouchingPVS = NULL;
8527                         mod->brush.BoxTouchingLeafPVS = NULL;
8528                         mod->brush.BoxTouchingVisibleLeafs = NULL;
8529                         mod->brush.FindBoxClusters = NULL;
8530                         mod->brush.LightPoint = NULL;
8531                         mod->brush.AmbientSoundLevelsForPoint = NULL;
8532                 }
8533                 mod->brush.submodel = i;
8534                 if (loadmodel->brush.submodels)
8535                         loadmodel->brush.submodels[i] = mod;
8536
8537                 // make the model surface list (used by shadowing/lighting)
8538                 mod->firstmodelsurface = submodelfirstsurface[i];
8539                 mod->nummodelsurfaces = submodelfirstsurface[i+1] - submodelfirstsurface[i];
8540                 mod->firstmodelbrush = 0;
8541                 mod->nummodelbrushes = 0;
8542                 mod->sortedmodelsurfaces = loadmodel->sortedmodelsurfaces + mod->firstmodelsurface;
8543                 Mod_MakeSortedSurfaces(mod);
8544
8545                 VectorClear(mod->normalmins);
8546                 VectorClear(mod->normalmaxs);
8547                 l = false;
8548                 for (j = 0;j < mod->nummodelsurfaces;j++)
8549                 {
8550                         const msurface_t *surface = mod->data_surfaces + j + mod->firstmodelsurface;
8551                         const float *v3f = mod->surfmesh.data_vertex3f + 3 * surface->num_firstvertex;
8552                         int k;
8553                         if (!surface->num_vertices)
8554                                 continue;
8555                         if (!l)
8556                         {
8557                                 l = true;
8558                                 VectorCopy(v3f, mod->normalmins);
8559                                 VectorCopy(v3f, mod->normalmaxs);
8560                         }
8561                         for (k = 0;k < surface->num_vertices;k++, v3f += 3)
8562                         {
8563                                 mod->normalmins[0] = min(mod->normalmins[0], v3f[0]);
8564                                 mod->normalmins[1] = min(mod->normalmins[1], v3f[1]);
8565                                 mod->normalmins[2] = min(mod->normalmins[2], v3f[2]);
8566                                 mod->normalmaxs[0] = max(mod->normalmaxs[0], v3f[0]);
8567                                 mod->normalmaxs[1] = max(mod->normalmaxs[1], v3f[1]);
8568                                 mod->normalmaxs[2] = max(mod->normalmaxs[2], v3f[2]);
8569                         }
8570                 }
8571                 corner[0] = max(fabs(mod->normalmins[0]), fabs(mod->normalmaxs[0]));
8572                 corner[1] = max(fabs(mod->normalmins[1]), fabs(mod->normalmaxs[1]));
8573                 corner[2] = max(fabs(mod->normalmins[2]), fabs(mod->normalmaxs[2]));
8574                 modelradius = sqrt(corner[0]*corner[0]+corner[1]*corner[1]+corner[2]*corner[2]);
8575                 yawradius = sqrt(corner[0]*corner[0]+corner[1]*corner[1]);
8576                 mod->rotatedmins[0] = mod->rotatedmins[1] = mod->rotatedmins[2] = -modelradius;
8577                 mod->rotatedmaxs[0] = mod->rotatedmaxs[1] = mod->rotatedmaxs[2] = modelradius;
8578                 mod->yawmaxs[0] = mod->yawmaxs[1] = yawradius;
8579                 mod->yawmins[0] = mod->yawmins[1] = -yawradius;
8580                 mod->yawmins[2] = mod->normalmins[2];
8581                 mod->yawmaxs[2] = mod->normalmaxs[2];
8582                 mod->radius = modelradius;
8583                 mod->radius2 = modelradius * modelradius;
8584
8585                 // this gets altered below if sky or water is used
8586                 mod->DrawSky = NULL;
8587                 mod->DrawAddWaterPlanes = NULL;
8588
8589                 for (j = 0;j < mod->nummodelsurfaces;j++)
8590                         if (mod->data_surfaces[j + mod->firstmodelsurface].texture->basematerialflags & MATERIALFLAG_SKY)
8591                                 break;
8592                 if (j < mod->nummodelsurfaces)
8593                         mod->DrawSky = R_Q1BSP_DrawSky;
8594
8595                 for (j = 0;j < mod->nummodelsurfaces;j++)
8596                         if (mod->data_surfaces[j + mod->firstmodelsurface].texture->basematerialflags & (MATERIALFLAG_WATERSHADER | MATERIALFLAG_REFRACTION | MATERIALFLAG_REFLECTION | MATERIALFLAG_CAMERA))
8597                                 break;
8598                 if (j < mod->nummodelsurfaces)
8599                         mod->DrawAddWaterPlanes = R_Q1BSP_DrawAddWaterPlanes;
8600
8601                 Mod_MakeCollisionBIH(mod, true, &mod->collision_bih);
8602                 mod->render_bih = mod->collision_bih;
8603
8604                 // generate VBOs and other shared data before cloning submodels
8605                 if (i == 0)
8606                         Mod_BuildVBOs();
8607         }
8608         mod = loadmodel;
8609         Mem_Free(submodelfirstsurface);
8610
8611         Con_DPrintf("Stats for obj model \"%s\": %i faces, %i nodes, %i leafs, %i clusters, %i clusterportals, mesh: %i vertices, %i triangles, %i surfaces\n", loadmodel->name, loadmodel->num_surfaces, loadmodel->brush.num_nodes, loadmodel->brush.num_leafs, mod->brush.num_pvsclusters, loadmodel->brush.num_portals, loadmodel->surfmesh.num_vertices, loadmodel->surfmesh.num_triangles, loadmodel->num_surfaces);
8612 }