gl_rsurf.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 // r_surf.c: surface-related refresh code
  21
  22 #include "quakedef.h"
  23 #include "r_shadow.h"
  24 #include "portals.h"
  25
  26 #define MAX_LIGHTMAP_SIZE 256
  27
  28 cvar_t r_ambient = {0, "r_ambient", "0", "brighter world cheat (not allowed in multiplayer), value is 0-128"};
  29 cvar_t r_drawportals = {0, "r_drawportals", "0", "shows portals (separating polygons) in world interior in quake1 maps"};
  30 cvar_t r_lockpvs = {0, "r_lockpvs", "0", "disables pvs switching, allows you to walk around and inspect what is visible from a given location in the map (anything not visible from your current location will not be drawn)"};
  31 cvar_t r_lockvisibility = {0, "r_lockvisibility", "0", "disables visibility updates, allows you to walk around and inspect what is visible from a given viewpoint in the map (anything offscreen at the moment this is enabled will not be drawn)"};
  32 cvar_t r_useportalculling = {0, "r_useportalculling", "1", "use advanced portal culling visibility method to improve performance over just Potentially Visible Set, provides an even more significant speed improvement in unvised maps"};
  33 cvar_t r_q3bsp_renderskydepth = {0, "r_q3bsp_renderskydepth", "0", "draws sky depth masking in q3 maps (as in q1 maps), this means for example that sky polygons can hide other things"};
  34
  35 // flag arrays used for visibility checking on world model
  36 // (all other entities have no per-surface/per-leaf visibility checks)
  37 // TODO: dynamic resize according to r_refdef.worldmodel->brush.num_clusters
  38 unsigned char r_pvsbits[(32768+7)>>3];
  39 // TODO: dynamic resize according to r_refdef.worldmodel->brush.num_leafs
  40 unsigned char r_worldleafvisible[32768];
  41 // TODO: dynamic resize according to r_refdef.worldmodel->num_surfaces
  42 unsigned char r_worldsurfacevisible[262144];
  43
  44 /*
  45 ===============
  46 R_BuildLightMap
  47
  48 Combine and scale multiple lightmaps into the 8.8 format in blocklights
  49 ===============
  50 */
  51 void R_BuildLightMap (const entity_render_t *ent, msurface_t *surface)
  52 {
  53         int smax, tmax, i, j, size, size3, maps, stride, l;
  54         unsigned int *bl, scale;
  55         unsigned char *lightmap, *out, *stain;
  56         static unsigned int intblocklights[MAX_LIGHTMAP_SIZE*MAX_LIGHTMAP_SIZE*3]; // LordHavoc: *3 for colored lighting
  57         static unsigned char templight[MAX_LIGHTMAP_SIZE*MAX_LIGHTMAP_SIZE*4];
  58
  59         // update cached lighting info
  60         surface->cached_dlight = 0;
  61
  62         smax = (surface->lightmapinfo->extents[0]>>4)+1;
  63         tmax = (surface->lightmapinfo->extents[1]>>4)+1;
  64         size = smax*tmax;
  65         size3 = size*3;
  66         lightmap = surface->lightmapinfo->samples;
  67
  68 // set to full bright if no light data
  69         bl = intblocklights;
  70         if (!ent->model->brushq1.lightdata)
  71         {
  72                 for (i = 0;i < size3;i++)
  73                         bl[i] = 255*256;
  74         }
  75         else
  76         {
  77 // clear to no light
  78                 memset(bl, 0, size*3*sizeof(unsigned int));
  79
  80 // add all the lightmaps
  81                 if (lightmap)
  82                 {
  83                         bl = intblocklights;
  84                         for (maps = 0;maps < MAXLIGHTMAPS && surface->lightmapinfo->styles[maps] != 255;maps++, lightmap += size3)
  85                                 for (scale = r_refdef.lightstylevalue[surface->lightmapinfo->styles[maps]], i = 0;i < size3;i++)
  86                                         bl[i] += lightmap[i] * scale;
  87                 }
  88         }
  89
  90         stain = surface->lightmapinfo->stainsamples;
  91         bl = intblocklights;
  92         out = templight;
  93         // the >> 16 shift adjusts down 8 bits to account for the stainmap
  94         // scaling, and remaps the 0-65536 (2x overbright) to 0-256, it will
  95         // be doubled during rendering to achieve 2x overbright
  96         // (0 = 0.0, 128 = 1.0, 256 = 2.0)
  97         if (ent->model->brushq1.lightmaprgba)
  98         {
  99                 stride = (surface->lightmapinfo->lightmaptexturestride - smax) * 4;
 100                 for (i = 0;i < tmax;i++, out += stride)
 101                 {
 102                         for (j = 0;j < smax;j++)
 103                         {
 104                                 l = (*bl++ * *stain++) >> 16;*out++ = min(l, 255);
 105                                 l = (*bl++ * *stain++) >> 16;*out++ = min(l, 255);
 106                                 l = (*bl++ * *stain++) >> 16;*out++ = min(l, 255);
 107                                 *out++ = 255;
 108                         }
 109                 }
 110         }
 111         else
 112         {
 113                 stride = (surface->lightmapinfo->lightmaptexturestride - smax) * 3;
 114                 for (i = 0;i < tmax;i++, out += stride)
 115                 {
 116                         for (j = 0;j < smax;j++)
 117                         {
 118                                 l = (*bl++ * *stain++) >> 16;*out++ = min(l, 255);
 119                                 l = (*bl++ * *stain++) >> 16;*out++ = min(l, 255);
 120                                 l = (*bl++ * *stain++) >> 16;*out++ = min(l, 255);
 121                         }
 122                 }
 123         }
 124
 125         R_UpdateTexture(surface->lightmaptexture, templight);
 126 }
 127
 128 void R_StainNode (mnode_t *node, model_t *model, const vec3_t origin, float radius, const float fcolor[8])
 129 {
 130         float ndist, a, ratio, maxdist, maxdist2, maxdist3, invradius, sdtable[256], td, dist2;
 131         msurface_t *surface, *endsurface;
 132         int i, s, t, smax, tmax, smax3, impacts, impactt, stained;
 133         unsigned char *bl;
 134         vec3_t impact;
 135
 136         maxdist = radius * radius;
 137         invradius = 1.0f / radius;
 138
 139 loc0:
 140         if (!node->plane)
 141                 return;
 142         ndist = PlaneDiff(origin, node->plane);
 143         if (ndist > radius)
 144         {
 145                 node = node->children[0];
 146                 goto loc0;
 147         }
 148         if (ndist < -radius)
 149         {
 150                 node = node->children[1];
 151                 goto loc0;
 152         }
 153
 154         dist2 = ndist * ndist;
 155         maxdist3 = maxdist - dist2;
 156
 157         if (node->plane->type < 3)
 158         {
 159                 VectorCopy(origin, impact);
 160                 impact[node->plane->type] -= ndist;
 161         }
 162         else
 163         {
 164                 impact[0] = origin[0] - node->plane->normal[0] * ndist;
 165                 impact[1] = origin[1] - node->plane->normal[1] * ndist;
 166                 impact[2] = origin[2] - node->plane->normal[2] * ndist;
 167         }
 168
 169         for (surface = model->data_surfaces + node->firstsurface, endsurface = surface + node->numsurfaces;surface < endsurface;surface++)
 170         {
 171                 if (surface->lightmapinfo->stainsamples)
 172                 {
 173                         smax = (surface->lightmapinfo->extents[0] >> 4) + 1;
 174                         tmax = (surface->lightmapinfo->extents[1] >> 4) + 1;
 175
 176                         impacts = DotProduct (impact, surface->lightmapinfo->texinfo->vecs[0]) + surface->lightmapinfo->texinfo->vecs[0][3] - surface->lightmapinfo->texturemins[0];
 177                         impactt = DotProduct (impact, surface->lightmapinfo->texinfo->vecs[1]) + surface->lightmapinfo->texinfo->vecs[1][3] - surface->lightmapinfo->texturemins[1];
 178
 179                         s = bound(0, impacts, smax * 16) - impacts;
 180                         t = bound(0, impactt, tmax * 16) - impactt;
 181                         i = s * s + t * t + dist2;
 182                         if (i > maxdist)
 183                                 continue;
 184
 185                         // reduce calculations
 186                         for (s = 0, i = impacts; s < smax; s++, i -= 16)
 187                                 sdtable[s] = i * i + dist2;
 188
 189                         bl = surface->lightmapinfo->stainsamples;
 190                         smax3 = smax * 3;
 191                         stained = false;
 192
 193                         i = impactt;
 194                         for (t = 0;t < tmax;t++, i -= 16)
 195                         {
 196                                 td = i * i;
 197                                 // make sure some part of it is visible on this line
 198                                 if (td < maxdist3)
 199                                 {
 200                                         maxdist2 = maxdist - td;
 201                                         for (s = 0;s < smax;s++)
 202                                         {
 203                                                 if (sdtable[s] < maxdist2)
 204                                                 {
 205                                                         ratio = lhrandom(0.0f, 1.0f);
 206                                                         a = (fcolor[3] + ratio * fcolor[7]) * (1.0f - sqrt(sdtable[s] + td) * invradius);
 207                                                         if (a >= (1.0f / 64.0f))
 208                                                         {
 209                                                                 if (a > 1)
 210                                                                         a = 1;
 211                                                                 bl[0] = (unsigned char) ((float) bl[0] + a * ((fcolor[0] + ratio * fcolor[4]) - (float) bl[0]));
 212                                                                 bl[1] = (unsigned char) ((float) bl[1] + a * ((fcolor[1] + ratio * fcolor[5]) - (float) bl[1]));
 213                                                                 bl[2] = (unsigned char) ((float) bl[2] + a * ((fcolor[2] + ratio * fcolor[6]) - (float) bl[2]));
 214                                                                 stained = true;
 215                                                         }
 216                                                 }
 217                                                 bl += 3;
 218                                         }
 219                                 }
 220                                 else // skip line
 221                                         bl += smax3;
 222                         }
 223                         // force lightmap upload
 224                         if (stained)
 225                                 surface->cached_dlight = true;
 226                 }
 227         }
 228
 229         if (node->children[0]->plane)
 230         {
 231                 if (node->children[1]->plane)
 232                 {
 233                         R_StainNode(node->children[0], model, origin, radius, fcolor);
 234                         node = node->children[1];
 235                         goto loc0;
 236                 }
 237                 else
 238                 {
 239                         node = node->children[0];
 240                         goto loc0;
 241                 }
 242         }
 243         else if (node->children[1]->plane)
 244         {
 245                 node = node->children[1];
 246                 goto loc0;
 247         }
 248 }
 249
 250 void R_Stain (const vec3_t origin, float radius, int cr1, int cg1, int cb1, int ca1, int cr2, int cg2, int cb2, int ca2)
 251 {
 252         int n;
 253         float fcolor[8];
 254         entity_render_t *ent;
 255         model_t *model;
 256         vec3_t org;
 257         if (r_refdef.worldmodel == NULL || !r_refdef.worldmodel->brush.data_nodes || !r_refdef.worldmodel->brushq1.lightdata)
 258                 return;
 259         fcolor[0] = cr1;
 260         fcolor[1] = cg1;
 261         fcolor[2] = cb1;
 262         fcolor[3] = ca1 * (1.0f / 64.0f);
 263         fcolor[4] = cr2 - cr1;
 264         fcolor[5] = cg2 - cg1;
 265         fcolor[6] = cb2 - cb1;
 266         fcolor[7] = (ca2 - ca1) * (1.0f / 64.0f);
 267
 268         R_StainNode(r_refdef.worldmodel->brush.data_nodes + r_refdef.worldmodel->brushq1.hulls[0].firstclipnode, r_refdef.worldmodel, origin, radius, fcolor);
 269
 270         // look for embedded bmodels
 271         for (n = 0;n < cl_num_brushmodel_entities;n++)
 272         {
 273                 ent = &cl_entities[cl_brushmodel_entities[n]].render;
 274                 model = ent->model;
 275                 if (model && model->name[0] == '*')
 276                 {
 277                         if (model->brush.data_nodes)
 278                         {
 279                                 Matrix4x4_Transform(&ent->inversematrix, origin, org);
 280                                 R_StainNode(model->brush.data_nodes + model->brushq1.hulls[0].firstclipnode, model, org, radius, fcolor);
 281                         }
 282                 }
 283         }
 284 }
 285
 286
 287 /*
 288 =============================================================
 289
 290         BRUSH MODELS
 291
 292 =============================================================
 293 */
 294
 295 static void R_DrawPortal_Callback(const entity_render_t *ent, int surfacenumber, const rtlight_t *rtlight)
 296 {
 297         const mportal_t *portal = (mportal_t *)ent;
 298         int i;
 299         float *v;
 300         rmeshstate_t m;
 301         GL_BlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
 302         GL_DepthMask(false);
 303         GL_DepthTest(true);
 304         R_Mesh_Matrix(&identitymatrix);
 305
 306         memset(&m, 0, sizeof(m));
 307         m.pointer_vertex = varray_vertex3f;
 308         R_Mesh_State(&m);
 309
 310         i = surfacenumber;
 311         GL_Color(((i & 0x0007) >> 0) * (1.0f / 7.0f),
 312                          ((i & 0x0038) >> 3) * (1.0f / 7.0f),
 313                          ((i & 0x01C0) >> 6) * (1.0f / 7.0f),
 314                          0.125f);
 315         if (PlaneDiff(r_vieworigin, (&portal->plane)) < 0)
 316         {
 317                 for (i = portal->numpoints - 1, v = varray_vertex3f;i >= 0;i--, v += 3)
 318                         VectorCopy(portal->points[i].position, v);
 319         }
 320         else
 321                 for (i = 0, v = varray_vertex3f;i < portal->numpoints;i++, v += 3)
 322                         VectorCopy(portal->points[i].position, v);
 323         GL_LockArrays(0, portal->numpoints);
 324         R_Mesh_Draw(0, portal->numpoints, portal->numpoints - 2, polygonelements);
 325         GL_LockArrays(0, 0);
 326 }
 327
 328 // LordHavoc: this is just a nice debugging tool, very slow
 329 static void R_DrawPortals(void)
 330 {
 331         int i, leafnum;
 332         mportal_t *portal;
 333         float center[3], f;
 334         model_t *model = r_refdef.worldmodel;
 335         if (model == NULL)
 336                 return;
 337         for (leafnum = 0;leafnum < r_refdef.worldmodel->brush.num_leafs;leafnum++)
 338         {
 339                 if (r_worldleafvisible[leafnum])
 340                 {
 341                         //for (portalnum = 0, portal = model->brush.data_portals;portalnum < model->brush.num_portals;portalnum++, portal++)
 342                         for (portal = r_refdef.worldmodel->brush.data_leafs[leafnum].portals;portal;portal = portal->next)
 343                         {
 344                                 if (portal->numpoints <= POLYGONELEMENTS_MAXPOINTS)
 345                                 if (!R_CullBox(portal->mins, portal->maxs))
 346                                 {
 347                                         VectorClear(center);
 348                                         for (i = 0;i < portal->numpoints;i++)
 349                                                 VectorAdd(center, portal->points[i].position, center);
 350                                         f = ixtable[portal->numpoints];
 351                                         VectorScale(center, f, center);
 352                                         R_MeshQueue_AddTransparent(center, R_DrawPortal_Callback, (entity_render_t *)portal, leafnum, r_shadow_rtlight);
 353                                 }
 354                         }
 355                 }
 356         }
 357 }
 358
 359 static void R_DrawCollisionBrush(colbrushf_t *brush)
 360 {
 361         int i;
 362         rmeshstate_t m;
 363         memset(&m, 0, sizeof(m));
 364         m.pointer_vertex = brush->points->v;
 365         R_Mesh_State(&m);
 366         i = (int)(((size_t)brush) / sizeof(colbrushf_t));
 367         GL_Color((i & 31) * (1.0f / 32.0f), ((i >> 5) & 31) * (1.0f / 32.0f), ((i >> 10) & 31) * (1.0f / 32.0f), 0.2f);
 368         GL_LockArrays(0, brush->numpoints);
 369         R_Mesh_Draw(0, brush->numpoints, brush->numtriangles, brush->elements);
 370         GL_LockArrays(0, 0);
 371 }
 372
 373 static void R_DrawCollisionSurface(entity_render_t *ent, msurface_t *surface)
 374 {
 375         int i;
 376         rmeshstate_t m;
 377         if (!surface->num_collisiontriangles)
 378                 return;
 379         memset(&m, 0, sizeof(m));
 380         m.pointer_vertex = surface->data_collisionvertex3f;
 381         R_Mesh_State(&m);
 382         i = (int)(((size_t)surface) / sizeof(msurface_t));
 383         GL_Color((i & 31) * (1.0f / 32.0f), ((i >> 5) & 31) * (1.0f / 32.0f), ((i >> 10) & 31) * (1.0f / 32.0f), 0.2f);
 384         GL_LockArrays(0, surface->num_collisionvertices);
 385         R_Mesh_Draw(0, surface->num_collisionvertices, surface->num_collisiontriangles, surface->data_collisionelement3i);
 386         GL_LockArrays(0, 0);
 387 }
 388
 389 void R_WorldVisibility(void)
 390 {
 391         int i, j, *mark;
 392         mleaf_t *leaf;
 393         mleaf_t *viewleaf;
 394         model_t *model = r_refdef.worldmodel;
 395
 396         if (!model)
 397                 return;
 398
 399         // if possible find the leaf the view origin is in
 400         viewleaf = model->brush.PointInLeaf ? model->brush.PointInLeaf(model, r_vieworigin) : NULL;
 401         // if possible fetch the visible cluster bits
 402         if (!r_lockpvs.integer && model->brush.FatPVS)
 403                 model->brush.FatPVS(model, r_vieworigin, 2, r_pvsbits, sizeof(r_pvsbits));
 404
 405         if (!r_lockvisibility.integer)
 406         {
 407                 // clear the visible surface and leaf flags arrays
 408                 memset(r_worldsurfacevisible, 0, model->num_surfaces);
 409                 memset(r_worldleafvisible, 0, model->brush.num_leafs);
 410
 411                 // if floating around in the void (no pvs data available, and no
 412                 // portals available), simply use all on-screen leafs.
 413                 if (!viewleaf || viewleaf->clusterindex < 0)
 414                 {
 415                         // no visibility method: (used when floating around in the void)
 416                         // simply cull each leaf to the frustum (view pyramid)
 417                         // similar to quake's RecursiveWorldNode but without cache misses
 418                         for (j = 0, leaf = model->brush.data_leafs;j < model->brush.num_leafs;j++, leaf++)
 419                         {
 420                                 // if leaf is in current pvs and on the screen, mark its surfaces
 421                                 if (!R_CullBox(leaf->mins, leaf->maxs))
 422                                 {
 423                                         renderstats.world_leafs++;
 424                                         r_worldleafvisible[j] = true;
 425                                         if (leaf->numleafsurfaces)
 426                                                 for (i = 0, mark = leaf->firstleafsurface;i < leaf->numleafsurfaces;i++, mark++)
 427                                                         r_worldsurfacevisible[*mark] = true;
 428                                 }
 429                         }
 430                 }
 431                 // if the user prefers to disable portal culling (testing?), simply
 432                 // use all on-screen leafs that are in the pvs.
 433                 else if (!r_useportalculling.integer)
 434                 {
 435                         // pvs method:
 436                         // simply check if each leaf is in the Potentially Visible Set,
 437                         // and cull to frustum (view pyramid)
 438                         // similar to quake's RecursiveWorldNode but without cache misses
 439                         for (j = 0, leaf = model->brush.data_leafs;j < model->brush.num_leafs;j++, leaf++)
 440                         {
 441                                 // if leaf is in current pvs and on the screen, mark its surfaces
 442                                 if (CHECKPVSBIT(r_pvsbits, leaf->clusterindex) && !R_CullBox(leaf->mins, leaf->maxs))
 443                                 {
 444                                         renderstats.world_leafs++;
 445                                         r_worldleafvisible[j] = true;
 446                                         if (leaf->numleafsurfaces)
 447                                                 for (i = 0, mark = leaf->firstleafsurface;i < leaf->numleafsurfaces;i++, mark++)
 448                                                         r_worldsurfacevisible[*mark] = true;
 449                                 }
 450                         }
 451                 }
 452                 // otherwise use a recursive portal flow, culling each portal to
 453                 // frustum and checking if the leaf the portal leads to is in the pvs
 454                 else
 455                 {
 456                         int leafstackpos;
 457                         mportal_t *p;
 458                         mleaf_t *leafstack[8192];
 459                         // simple-frustum portal method:
 460                         // follows portals leading outward from viewleaf, does not venture
 461                         // offscreen or into leafs that are not visible, faster than
 462                         // Quake's RecursiveWorldNode and vastly better in unvised maps,
 463                         // often culls some surfaces that pvs alone would miss
 464                         // (such as a room in pvs that is hidden behind a wall, but the
 465                         //  passage leading to the room is off-screen)
 466                         leafstack[0] = viewleaf;
 467                         leafstackpos = 1;
 468                         while (leafstackpos)
 469                         {
 470                                 renderstats.world_leafs++;
 471                                 leaf = leafstack[--leafstackpos];
 472                                 r_worldleafvisible[leaf - model->brush.data_leafs] = true;
 473                                 // mark any surfaces bounding this leaf
 474                                 if (leaf->numleafsurfaces)
 475                                         for (i = 0, mark = leaf->firstleafsurface;i < leaf->numleafsurfaces;i++, mark++)
 476                                                 r_worldsurfacevisible[*mark] = true;
 477                                 // follow portals into other leafs
 478                                 // the checks are:
 479                                 // if viewer is behind portal (portal faces outward into the scene)
 480                                 // and the portal polygon's bounding box is on the screen
 481                                 // and the leaf has not been visited yet
 482                                 // and the leaf is visible in the pvs
 483                                 // (the first two checks won't cause as many cache misses as the leaf checks)
 484                                 for (p = leaf->portals;p;p = p->next)
 485                                 {
 486                                         renderstats.world_portals++;
 487                                         if (DotProduct(r_vieworigin, p->plane.normal) < (p->plane.dist + 1) && !R_CullBox(p->mins, p->maxs) && !r_worldleafvisible[p->past - model->brush.data_leafs] && CHECKPVSBIT(r_pvsbits, p->past->clusterindex))
 488                                                 leafstack[leafstackpos++] = p->past;
 489                                 }
 490                         }
 491                 }
 492         }
 493
 494         if (r_drawportals.integer)
 495                 R_DrawPortals();
 496 }
 497
 498 void R_Q1BSP_DrawSky(entity_render_t *ent)
 499 {
 500         if (ent->model == NULL)
 501                 return;
 502         R_DrawSurfaces(ent, true);
 503 }
 504
 505 void R_Q1BSP_Draw(entity_render_t *ent)
 506 {
 507         model_t *model = ent->model;
 508         if (model == NULL)
 509                 return;
 510         R_DrawSurfaces(ent, false);
 511         if (r_showcollisionbrushes.integer && model->brush.num_brushes && !r_showtrispass)
 512         {
 513                 int i;
 514                 msurface_t *surface;
 515                 q3mbrush_t *brush;
 516                 R_Mesh_Matrix(&ent->matrix);
 517                 GL_BlendFunc(GL_SRC_ALPHA, GL_ONE);
 518                 GL_DepthMask(false);
 519                 GL_DepthTest(!r_showdisabledepthtest.integer);
 520                 qglPolygonOffset(r_showcollisionbrushes_polygonfactor.value, r_showcollisionbrushes_polygonoffset.value);
 521                 for (i = 0, brush = model->brush.data_brushes + model->firstmodelbrush;i < model->nummodelbrushes;i++, brush++)
 522                         if (brush->colbrushf && brush->colbrushf->numtriangles)
 523                                 R_DrawCollisionBrush(brush->colbrushf);
 524                 for (i = 0, surface = model->data_surfaces + model->firstmodelsurface;i < model->nummodelsurfaces;i++, surface++)
 525                         if (surface->num_collisiontriangles)
 526                                 R_DrawCollisionSurface(ent, surface);
 527                 qglPolygonOffset(0, 0);
 528         }
 529 }
 530
 531 typedef struct r_q1bsp_getlightinfo_s
 532 {
 533         model_t *model;
 534         vec3_t relativelightorigin;
 535         float lightradius;
 536         int *outleaflist;
 537         unsigned char *outleafpvs;
 538         int outnumleafs;
 539         int *outsurfacelist;
 540         unsigned char *outsurfacepvs;
 541         int outnumsurfaces;
 542         vec3_t outmins;
 543         vec3_t outmaxs;
 544         vec3_t lightmins;
 545         vec3_t lightmaxs;
 546         const unsigned char *pvs;
 547 }
 548 r_q1bsp_getlightinfo_t;
 549
 550 void R_Q1BSP_RecursiveGetLightInfo(r_q1bsp_getlightinfo_t *info, mnode_t *node)
 551 {
 552         int sides;
 553         mleaf_t *leaf;
 554         for (;;)
 555         {
 556                 mplane_t *plane = node->plane;
 557                 //if (!BoxesOverlap(info->lightmins, info->lightmaxs, node->mins, node->maxs))
 558                 //      return;
 559                 if (!plane)
 560                         break;
 561                 if (plane->type < 3)
 562                         sides = ((info->lightmaxs[plane->type] >= plane->dist) | ((info->lightmins[plane->type] < plane->dist) << 1));
 563                 else
 564                         sides = BoxOnPlaneSide(info->lightmins, info->lightmaxs, plane);
 565                 if (sides == 3)
 566                 {
 567                         R_Q1BSP_RecursiveGetLightInfo(info, node->children[0]);
 568                         node = node->children[1];
 569                 }
 570                 else if (sides == 0)
 571                         return; // ERROR: NAN bounding box!
 572                 else
 573                         node = node->children[sides - 1];
 574         }
 575         leaf = (mleaf_t *)node;
 576         if (info->pvs == NULL || CHECKPVSBIT(info->pvs, leaf->clusterindex))
 577         {
 578                 info->outmins[0] = min(info->outmins[0], leaf->mins[0]);
 579                 info->outmins[1] = min(info->outmins[1], leaf->mins[1]);
 580                 info->outmins[2] = min(info->outmins[2], leaf->mins[2]);
 581                 info->outmaxs[0] = max(info->outmaxs[0], leaf->maxs[0]);
 582                 info->outmaxs[1] = max(info->outmaxs[1], leaf->maxs[1]);
 583                 info->outmaxs[2] = max(info->outmaxs[2], leaf->maxs[2]);
 584                 if (info->outleafpvs)
 585                 {
 586                         int leafindex = leaf - info->model->brush.data_leafs;
 587                         if (!CHECKPVSBIT(info->outleafpvs, leafindex))
 588                         {
 589                                 SETPVSBIT(info->outleafpvs, leafindex);
 590                                 info->outleaflist[info->outnumleafs++] = leafindex;
 591                         }
 592                 }
 593                 if (info->outsurfacepvs)
 594                 {
 595                         int leafsurfaceindex;
 596                         for (leafsurfaceindex = 0;leafsurfaceindex < leaf->numleafsurfaces;leafsurfaceindex++)
 597                         {
 598                                 int surfaceindex = leaf->firstleafsurface[leafsurfaceindex];
 599                                 if (!CHECKPVSBIT(info->outsurfacepvs, surfaceindex))
 600                                 {
 601                                         msurface_t *surface = info->model->data_surfaces + surfaceindex;
 602                                         if (BoxesOverlap(info->lightmins, info->lightmaxs, surface->mins, surface->maxs))
 603                                         {
 604                                                 int triangleindex, t;
 605                                                 const int *e;
 606                                                 const vec_t *v[3];
 607                                                 for (triangleindex = 0, t = surface->num_firstshadowmeshtriangle, e = info->model->brush.shadowmesh->element3i + t * 3;triangleindex < surface->num_triangles;triangleindex++, t++, e += 3)
 608                                                 {
 609                                                         v[0] = info->model->brush.shadowmesh->vertex3f + e[0] * 3;
 610                                                         v[1] = info->model->brush.shadowmesh->vertex3f + e[1] * 3;
 611                                                         v[2] = info->model->brush.shadowmesh->vertex3f + e[2] * 3;
 612                                                         if (PointInfrontOfTriangle(info->relativelightorigin, v[0], v[1], v[2]) && info->lightmaxs[0] > min(v[0][0], min(v[1][0], v[2][0])) && info->lightmins[0] < max(v[0][0], max(v[1][0], v[2][0])) && info->lightmaxs[1] > min(v[0][1], min(v[1][1], v[2][1])) && info->lightmins[1] < max(v[0][1], max(v[1][1], v[2][1])) && info->lightmaxs[2] > min(v[0][2], min(v[1][2], v[2][2])) && info->lightmins[2] < max(v[0][2], max(v[1][2], v[2][2])))
 613                                                         {
 614                                                                 SETPVSBIT(info->outsurfacepvs, surfaceindex);
 615                                                                 info->outsurfacelist[info->outnumsurfaces++] = surfaceindex;
 616                                                                 break;
 617                                                         }
 618                                                 }
 619                                         }
 620                                 }
 621                         }
 622                 }
 623         }
 624 }
 625
 626 void R_Q1BSP_GetLightInfo(entity_render_t *ent, vec3_t relativelightorigin, float lightradius, vec3_t outmins, vec3_t outmaxs, int *outleaflist, unsigned char *outleafpvs, int *outnumleafspointer, int *outsurfacelist, unsigned char *outsurfacepvs, int *outnumsurfacespointer)
 627 {
 628         r_q1bsp_getlightinfo_t info;
 629         VectorCopy(relativelightorigin, info.relativelightorigin);
 630         info.lightradius = lightradius;
 631         info.lightmins[0] = info.relativelightorigin[0] - info.lightradius;
 632         info.lightmins[1] = info.relativelightorigin[1] - info.lightradius;
 633         info.lightmins[2] = info.relativelightorigin[2] - info.lightradius;
 634         info.lightmaxs[0] = info.relativelightorigin[0] + info.lightradius;
 635         info.lightmaxs[1] = info.relativelightorigin[1] + info.lightradius;
 636         info.lightmaxs[2] = info.relativelightorigin[2] + info.lightradius;
 637         if (ent->model == NULL)
 638         {
 639                 VectorCopy(info.lightmins, outmins);
 640                 VectorCopy(info.lightmaxs, outmaxs);
 641                 *outnumleafspointer = 0;
 642                 *outnumsurfacespointer = 0;
 643                 return;
 644         }
 645         info.model = ent->model;
 646         info.outleaflist = outleaflist;
 647         info.outleafpvs = outleafpvs;
 648         info.outnumleafs = 0;
 649         info.outsurfacelist = outsurfacelist;
 650         info.outsurfacepvs = outsurfacepvs;
 651         info.outnumsurfaces = 0;
 652         VectorCopy(info.relativelightorigin, info.outmins);
 653         VectorCopy(info.relativelightorigin, info.outmaxs);
 654         memset(outleafpvs, 0, (info.model->brush.num_leafs + 7) >> 3);
 655         memset(outsurfacepvs, 0, (info.model->nummodelsurfaces + 7) >> 3);
 656         if (info.model->brush.GetPVS)
 657                 info.pvs = info.model->brush.GetPVS(info.model, info.relativelightorigin);
 658         else
 659                 info.pvs = NULL;
 660         R_UpdateAllTextureInfo(ent);
 661         if (r_shadow_compilingrtlight)
 662         {
 663                 // use portal recursion for exact light volume culling, and exact surface checking
 664                 Portal_Visibility(info.model, info.relativelightorigin, info.outleaflist, info.outleafpvs, &info.outnumleafs, info.outsurfacelist, info.outsurfacepvs, &info.outnumsurfaces, NULL, 0, true, info.lightmins, info.lightmaxs, info.outmins, info.outmaxs);
 665         }
 666         else if (r_shadow_realtime_dlight_portalculling.integer)
 667         {
 668                 // use portal recursion for exact light volume culling, but not the expensive exact surface checking
 669                 Portal_Visibility(info.model, info.relativelightorigin, info.outleaflist, info.outleafpvs, &info.outnumleafs, info.outsurfacelist, info.outsurfacepvs, &info.outnumsurfaces, NULL, 0, r_shadow_realtime_dlight_portalculling.integer >= 2, info.lightmins, info.lightmaxs, info.outmins, info.outmaxs);
 670         }
 671         else
 672         {
 673                 // use BSP recursion as lights are often small
 674                 R_Q1BSP_RecursiveGetLightInfo(&info, info.model->brush.data_nodes);
 675         }
 676
 677         // limit combined leaf box to light boundaries
 678         outmins[0] = max(info.outmins[0] - 1, info.lightmins[0]);
 679         outmins[1] = max(info.outmins[1] - 1, info.lightmins[1]);
 680         outmins[2] = max(info.outmins[2] - 1, info.lightmins[2]);
 681         outmaxs[0] = min(info.outmaxs[0] + 1, info.lightmaxs[0]);
 682         outmaxs[1] = min(info.outmaxs[1] + 1, info.lightmaxs[1]);
 683         outmaxs[2] = min(info.outmaxs[2] + 1, info.lightmaxs[2]);
 684
 685         *outnumleafspointer = info.outnumleafs;
 686         *outnumsurfacespointer = info.outnumsurfaces;
 687 }
 688
 689 void R_Q1BSP_CompileShadowVolume(entity_render_t *ent, vec3_t relativelightorigin, float lightradius, int numsurfaces, const int *surfacelist)
 690 {
 691         model_t *model = ent->model;
 692         msurface_t *surface;
 693         int surfacelistindex;
 694         float projectdistance = lightradius + model->radius*2 + r_shadow_projectdistance.value;
 695         texture_t *texture;
 696         r_shadow_compilingrtlight->static_meshchain_shadow = Mod_ShadowMesh_Begin(r_shadow_mempool, 32768, 32768, NULL, NULL, NULL, false, false, true);
 697         R_Shadow_PrepareShadowMark(model->brush.shadowmesh->numtriangles);
 698         for (surfacelistindex = 0;surfacelistindex < numsurfaces;surfacelistindex++)
 699         {
 700                 surface = model->data_surfaces + surfacelist[surfacelistindex];
 701                 texture = surface->texture;
 702                 if ((texture->basematerialflags & (MATERIALFLAG_NODRAW | MATERIALFLAG_TRANSPARENT | MATERIALFLAG_WALL)) != MATERIALFLAG_WALL)
 703                         continue;
 704                 if ((texture->textureflags & (Q3TEXTUREFLAG_TWOSIDED | Q3TEXTUREFLAG_AUTOSPRITE | Q3TEXTUREFLAG_AUTOSPRITE2)) || (ent->flags & RENDER_NOCULLFACE))
 705                         continue;
 706                 R_Shadow_MarkVolumeFromBox(surface->num_firstshadowmeshtriangle, surface->num_triangles, model->brush.shadowmesh->vertex3f, model->brush.shadowmesh->element3i, relativelightorigin, r_shadow_compilingrtlight->cullmins, r_shadow_compilingrtlight->cullmaxs, surface->mins, surface->maxs);
 707         }
 708         R_Shadow_VolumeFromList(model->brush.shadowmesh->numverts, model->brush.shadowmesh->numtriangles, model->brush.shadowmesh->vertex3f, model->brush.shadowmesh->element3i, model->brush.shadowmesh->neighbor3i, relativelightorigin, lightradius + model->radius + projectdistance, numshadowmark, shadowmarklist);
 709         r_shadow_compilingrtlight->static_meshchain_shadow = Mod_ShadowMesh_Finish(r_shadow_mempool, r_shadow_compilingrtlight->static_meshchain_shadow, false, false);
 710 }
 711
 712 extern float *rsurface_vertex3f;
 713 extern float *rsurface_svector3f;
 714 extern float *rsurface_tvector3f;
 715 extern float *rsurface_normal3f;
 716 extern void RSurf_SetVertexPointer(const entity_render_t *ent, const texture_t *texture, const msurface_t *surface, const vec3_t modelorg);
 717
 718 void R_Q1BSP_DrawShadowVolume(entity_render_t *ent, vec3_t relativelightorigin, float lightradius, int numsurfaces, const int *surfacelist, const vec3_t lightmins, const vec3_t lightmaxs)
 719 {
 720         model_t *model = ent->model;
 721         msurface_t *surface;
 722         int surfacelistindex;
 723         float projectdistance = lightradius + model->radius*2 + r_shadow_projectdistance.value;
 724         vec3_t modelorg;
 725         texture_t *texture;
 726         // check the box in modelspace, it was already checked in worldspace
 727         if (!BoxesOverlap(ent->model->normalmins, ent->model->normalmaxs, lightmins, lightmaxs))
 728                 return;
 729         R_UpdateAllTextureInfo(ent);
 730         if (model->brush.shadowmesh)
 731         {
 732                 R_Shadow_PrepareShadowMark(model->brush.shadowmesh->numtriangles);
 733                 for (surfacelistindex = 0;surfacelistindex < numsurfaces;surfacelistindex++)
 734                 {
 735                         surface = model->data_surfaces + surfacelist[surfacelistindex];
 736                         texture = surface->texture->currentframe;
 737                         if ((texture->currentmaterialflags & (MATERIALFLAG_NODRAW | MATERIALFLAG_TRANSPARENT | MATERIALFLAG_WALL)) != MATERIALFLAG_WALL)
 738                                 continue;
 739                         if ((texture->textureflags & (Q3TEXTUREFLAG_TWOSIDED | Q3TEXTUREFLAG_AUTOSPRITE | Q3TEXTUREFLAG_AUTOSPRITE2)) || (ent->flags & RENDER_NOCULLFACE))
 740                                 continue;
 741                         R_Shadow_MarkVolumeFromBox(surface->num_firstshadowmeshtriangle, surface->num_triangles, model->brush.shadowmesh->vertex3f, model->brush.shadowmesh->element3i, relativelightorigin, lightmins, lightmaxs, surface->mins, surface->maxs);
 742                 }
 743                 R_Shadow_VolumeFromList(model->brush.shadowmesh->numverts, model->brush.shadowmesh->numtriangles, model->brush.shadowmesh->vertex3f, model->brush.shadowmesh->element3i, model->brush.shadowmesh->neighbor3i, relativelightorigin, lightradius + model->radius + projectdistance, numshadowmark, shadowmarklist);
 744         }
 745         else
 746         {
 747                 projectdistance = lightradius + ent->model->radius*2;
 748                 Matrix4x4_Transform(&ent->inversematrix, r_vieworigin, modelorg);
 749                 for (surfacelistindex = 0;surfacelistindex < numsurfaces;surfacelistindex++)
 750                 {
 751                         surface = model->data_surfaces + surfacelist[surfacelistindex];
 752                         // FIXME: get current skin
 753                         texture = surface->texture;//R_FetchAliasSkin(ent, surface->groupmesh);
 754                         if (texture->currentmaterialflags & (MATERIALFLAG_NODRAW | MATERIALFLAG_TRANSPARENT) || !surface->num_triangles)
 755                                 continue;
 756                         RSurf_SetVertexPointer(ent, texture, surface, modelorg);
 757                         // identify lit faces within the bounding box
 758                         R_Shadow_PrepareShadowMark(surface->groupmesh->num_triangles);
 759                         R_Shadow_MarkVolumeFromBox(surface->num_firsttriangle, surface->num_triangles, rsurface_vertex3f, surface->groupmesh->data_element3i, relativelightorigin, lightmins, lightmaxs, surface->mins, surface->maxs);
 760                         R_Shadow_VolumeFromList(surface->groupmesh->num_vertices, surface->groupmesh->num_triangles, rsurface_vertex3f, surface->groupmesh->data_element3i, surface->groupmesh->data_neighbor3i, relativelightorigin, projectdistance, numshadowmark, shadowmarklist);
 761                 }
 762         }
 763 }
 764
 765 static void R_Q1BSP_DrawLight_TransparentCallback(const entity_render_t *ent, int surfacenumber, const rtlight_t *rtlight)
 766 {
 767         msurface_t *surface = ent->model->data_surfaces + surfacenumber;
 768         texture_t *texture = surface->texture;
 769         R_UpdateTextureInfo(ent, texture);
 770         texture = texture->currentframe;
 771         R_Shadow_RenderMode_Begin();
 772         R_Shadow_RenderMode_ActiveLight((rtlight_t *)rtlight);
 773         R_Shadow_RenderMode_Lighting(false, true);
 774         R_Shadow_SetupEntityLight(ent);
 775         R_Shadow_RenderSurfacesLighting(ent, texture, 1, &surface);
 776         R_Shadow_RenderMode_End();
 777 }
 778
 779 static void R_Q1BSP_DrawLight_TransparentBatch(const entity_render_t *ent, texture_t *texture, int batchnumsurfaces, msurface_t **batchsurfacelist)
 780 {
 781         int batchsurfaceindex;
 782         msurface_t *batchsurface;
 783         vec3_t tempcenter, center;
 784         for (batchsurfaceindex = 0;batchsurfaceindex < batchnumsurfaces;batchsurfaceindex++)
 785         {
 786                 batchsurface = batchsurfacelist[batchsurfaceindex];
 787                 tempcenter[0] = (batchsurface->mins[0] + batchsurface->maxs[0]) * 0.5f;
 788                 tempcenter[1] = (batchsurface->mins[1] + batchsurface->maxs[1]) * 0.5f;
 789                 tempcenter[2] = (batchsurface->mins[2] + batchsurface->maxs[2]) * 0.5f;
 790                 Matrix4x4_Transform(&ent->matrix, tempcenter, center);
 791                 R_MeshQueue_AddTransparent(texture->currentmaterialflags & MATERIALFLAG_NODEPTHTEST ? r_vieworigin : center, R_Q1BSP_DrawLight_TransparentCallback, ent, batchsurface - ent->model->data_surfaces, r_shadow_rtlight);
 792         }
 793 }
 794
 795 #define RSURF_MAX_BATCHSURFACES 1024
 796
 797 void R_Q1BSP_DrawLight(entity_render_t *ent, int numsurfaces, const int *surfacelist)
 798 {
 799         model_t *model = ent->model;
 800         msurface_t *surface;
 801         texture_t *texture;
 802         int surfacelistindex, batchnumsurfaces;
 803         msurface_t *batchsurfacelist[RSURF_MAX_BATCHSURFACES];
 804         vec3_t modelorg;
 805         texture_t *tex;
 806         qboolean skip;
 807         R_UpdateAllTextureInfo(ent);
 808         Matrix4x4_Transform(&ent->inversematrix, r_vieworigin, modelorg);
 809         tex = NULL;
 810         texture = NULL;
 811         skip = false;
 812         batchnumsurfaces = 0;
 813         for (surfacelistindex = 0;surfacelistindex < numsurfaces;surfacelistindex++)
 814         {
 815                 if ((ent == r_refdef.worldentity && !r_worldsurfacevisible[surfacelist[surfacelistindex]]))
 816                         continue;
 817                 surface = model->data_surfaces + surfacelist[surfacelistindex];
 818                 renderstats.lights_lighttriangles += surface->num_triangles;
 819                 if (tex != surface->texture)
 820                 {
 821                         if (batchnumsurfaces > 0)
 822                         {
 823                                 if (texture->currentmaterialflags & MATERIALFLAG_TRANSPARENT)
 824                                         R_Q1BSP_DrawLight_TransparentBatch(ent, texture, batchnumsurfaces, batchsurfacelist);
 825                                 else
 826                                         R_Shadow_RenderSurfacesLighting(ent, texture, batchnumsurfaces, batchsurfacelist);
 827                                 batchnumsurfaces = 0;
 828                         }
 829                         tex = surface->texture;
 830                         texture = surface->texture->currentframe;
 831                         skip = (texture->currentmaterialflags & MATERIALFLAG_SKY) != 0;
 832                         if (skip)
 833                                 continue;
 834                 }
 835                 if (!skip && surface->num_triangles)
 836                 {
 837                         if (batchnumsurfaces == RSURF_MAX_BATCHSURFACES)
 838                         {
 839                                 if (texture->currentmaterialflags & MATERIALFLAG_TRANSPARENT)
 840                                         R_Q1BSP_DrawLight_TransparentBatch(ent, texture, batchnumsurfaces, batchsurfacelist);
 841                                 else
 842                                         R_Shadow_RenderSurfacesLighting(ent, texture, batchnumsurfaces, batchsurfacelist);
 843                                 batchnumsurfaces = 0;
 844                         }
 845                         batchsurfacelist[batchnumsurfaces++] = surface;
 846                 }
 847         }
 848         if (batchnumsurfaces > 0)
 849         {
 850                 if (texture->currentmaterialflags & MATERIALFLAG_TRANSPARENT)
 851                         R_Q1BSP_DrawLight_TransparentBatch(ent, texture, batchnumsurfaces, batchsurfacelist);
 852                 else
 853                         R_Shadow_RenderSurfacesLighting(ent, texture, batchnumsurfaces, batchsurfacelist);
 854                 batchnumsurfaces = 0;
 855         }
 856         qglEnable(GL_CULL_FACE);
 857 }
 858
 859 //Made by [515]
 860 void R_ReplaceWorldTexture (void)
 861 {
 862         model_t         *m;
 863         texture_t       *t;
 864         int                     i;
 865         const char      *r, *newt;
 866         m = r_refdef.worldmodel;
 867
 868         if(Cmd_Argc() < 2)
 869         {
 870                 Con_Print("r_replacemaptexture <texname> <newtexname> - replaces texture\n");
 871                 Con_Print("r_replacemaptexture <texname> - switch back to default texture\n");
 872                 return;
 873         }
 874         if(!cl.islocalgame || !cl.worldmodel)
 875         {
 876                 Con_Print("This command works only in singleplayer\n");
 877                 return;
 878         }
 879         r = Cmd_Argv(1);
 880         newt = Cmd_Argv(2);
 881         if(!newt[0])
 882                 newt = r;
 883         for(i=0,t=m->data_textures;i<m->num_textures;i++,t++)
 884         {
 885                 if(t->width && !strcasecmp(t->name, r))
 886                 {
 887                         if(Mod_LoadSkinFrame(&t->skin, (char*)newt, TEXF_MIPMAP | TEXF_ALPHA | TEXF_PRECACHE | TEXF_PICMIP, false, r_fullbrights.integer))
 888                         {
 889                                 Con_Printf("%s replaced with %s\n", r, newt);
 890                                 return;
 891                         }
 892                         else
 893                         {
 894                                 Con_Printf("%s was not found\n", newt);
 895                                 Mod_LoadSkinFrame(&t->skin, (char*)r, TEXF_MIPMAP | TEXF_ALPHA | TEXF_PRECACHE | TEXF_PICMIP, false, r_fullbrights.integer);//back to default
 896                                 return;
 897                         }
 898                 }
 899         }
 900 }
 901
 902 //Made by [515]
 903 void R_ListWorldTextures (void)
 904 {
 905         model_t         *m;
 906         texture_t       *t;
 907         int                     i;
 908         m = r_refdef.worldmodel;
 909
 910         Con_Print("Worldmodel textures :\n");
 911         for(i=0,t=m->data_textures;i<m->num_textures;i++,t++)
 912                 if(t->skin.base != r_texture_notexture)
 913                         Con_Printf("%s\n", t->name);
 914 }
 915
 916 #if 0
 917 static void gl_surf_start(void)
 918 {
 919 }
 920
 921 static void gl_surf_shutdown(void)
 922 {
 923 }
 924
 925 static void gl_surf_newmap(void)
 926 {
 927 }
 928 #endif
 929
 930 void GL_Surf_Init(void)
 931 {
 932
 933         Cvar_RegisterVariable(&r_ambient);
 934         Cvar_RegisterVariable(&r_drawportals);
 935         Cvar_RegisterVariable(&r_lockpvs);
 936         Cvar_RegisterVariable(&r_lockvisibility);
 937         Cvar_RegisterVariable(&r_useportalculling);
 938         Cvar_RegisterVariable(&r_q3bsp_renderskydepth);
 939
 940         Cmd_AddCommand ("r_replacemaptexture", R_ReplaceWorldTexture, "override a map texture for testing purposes");   // By [515]
 941         Cmd_AddCommand ("r_listmaptextures", R_ListWorldTextures, "list all textures used by the current map"); // By [515]
 942
 943         //R_RegisterModule("GL_Surf", gl_surf_start, gl_surf_shutdown, gl_surf_newmap);
 944 }
 945