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", "brightens map, value is 0-128"};
  29 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)"};
  30 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)"};
  31 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"};
  32 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"};
  33
  34 /*
  35 ===============
  36 R_BuildLightMap
  37
  38 Combine and scale multiple lightmaps into the 8.8 format in blocklights
  39 ===============
  40 */
  41 void R_BuildLightMap (const entity_render_t *ent, msurface_t *surface)
  42 {
  43         int smax, tmax, i, size, size3, maps, l;
  44         int *bl, scale;
  45         unsigned char *lightmap, *out, *stain;
  46         model_t *model = ent->model;
  47         int *intblocklights;
  48         unsigned char *templight;
  49
  50         smax = (surface->lightmapinfo->extents[0]>>4)+1;
  51         tmax = (surface->lightmapinfo->extents[1]>>4)+1;
  52         size = smax*tmax;
  53         size3 = size*3;
  54
  55         if (cl.buildlightmapmemorysize < size*sizeof(int[3]))
  56         {
  57                 cl.buildlightmapmemorysize = size*sizeof(int[3]);
  58                 if (cl.buildlightmapmemory)
  59                         Mem_Free(cl.buildlightmapmemory);
  60                 cl.buildlightmapmemory = Mem_Alloc(cls.levelmempool, cl.buildlightmapmemorysize);
  61         }
  62
  63         // these both point at the same buffer, templight is only used for final
  64         // processing and can replace the intblocklights data as it goes
  65         intblocklights = (int *)cl.buildlightmapmemory;
  66         templight = (unsigned char *)cl.buildlightmapmemory;
  67
  68         // update cached lighting info
  69         surface->cached_dlight = 0;
  70
  71         lightmap = surface->lightmapinfo->samples;
  72
  73 // set to full bright if no light data
  74         bl = intblocklights;
  75         if (!model->brushq1.lightdata)
  76         {
  77                 for (i = 0;i < size3;i++)
  78                         bl[i] = 128*256;
  79         }
  80         else
  81         {
  82 // clear to no light
  83                 memset(bl, 0, size3*sizeof(*bl));
  84
  85 // add all the lightmaps
  86                 if (lightmap)
  87                         for (maps = 0;maps < MAXLIGHTMAPS && surface->lightmapinfo->styles[maps] != 255;maps++, lightmap += size3)
  88                                 for (scale = r_refdef.lightstylevalue[surface->lightmapinfo->styles[maps]], i = 0;i < size3;i++)
  89                                         bl[i] += lightmap[i] * scale;
  90         }
  91
  92         stain = surface->lightmapinfo->stainsamples;
  93         bl = intblocklights;
  94         out = templight;
  95         // the >> 16 shift adjusts down 8 bits to account for the stainmap
  96         // scaling, and remaps the 0-65536 (2x overbright) to 0-256, it will
  97         // be doubled during rendering to achieve 2x overbright
  98         // (0 = 0.0, 128 = 1.0, 256 = 2.0)
  99         if (model->brushq1.lightmaprgba)
 100         {
 101                 for (i = 0;i < size;i++)
 102                 {
 103                         l = (*bl++ * *stain++) >> 16;*out++ = min(l, 255);
 104                         l = (*bl++ * *stain++) >> 16;*out++ = min(l, 255);
 105                         l = (*bl++ * *stain++) >> 16;*out++ = min(l, 255);
 106                         *out++ = 255;
 107                 }
 108         }
 109         else
 110         {
 111                 for (i = 0;i < size;i++)
 112                 {
 113                         l = (*bl++ * *stain++) >> 16;*out++ = min(l, 255);
 114                         l = (*bl++ * *stain++) >> 16;*out++ = min(l, 255);
 115                         l = (*bl++ * *stain++) >> 16;*out++ = min(l, 255);
 116                 }
 117         }
 118
 119         R_UpdateTexture(surface->lightmaptexture, templight, surface->lightmapinfo->lightmaporigin[0], surface->lightmapinfo->lightmaporigin[1], smax, tmax);
 120
 121         // update the surface's deluxemap if it has one
 122         if (surface->deluxemaptexture != r_texture_blanknormalmap)
 123         {
 124                 vec3_t n;
 125                 unsigned char *normalmap = surface->lightmapinfo->nmapsamples;
 126                 lightmap = surface->lightmapinfo->samples;
 127                 // clear to no normalmap
 128                 bl = intblocklights;
 129                 memset(bl, 0, size3*sizeof(*bl));
 130                 // add all the normalmaps
 131                 if (lightmap && normalmap)
 132                 {
 133                         for (maps = 0;maps < MAXLIGHTMAPS && surface->lightmapinfo->styles[maps] != 255;maps++, lightmap += size3, normalmap += size3)
 134                         {
 135                                 for (scale = r_refdef.lightstylevalue[surface->lightmapinfo->styles[maps]], i = 0;i < size;i++)
 136                                 {
 137                                         // add the normalmap with weighting proportional to the style's lightmap intensity
 138                                         l = (int)(VectorLength(lightmap + i*3) * scale);
 139                                         bl[i*3+0] += ((int)normalmap[i*3+0] - 128) * l;
 140                                         bl[i*3+1] += ((int)normalmap[i*3+1] - 128) * l;
 141                                         bl[i*3+2] += ((int)normalmap[i*3+2] - 128) * l;
 142                                 }
 143                         }
 144                 }
 145                 bl = intblocklights;
 146                 out = templight;
 147                 // we simply renormalize the weighted normals to get a valid deluxemap
 148                 if (model->brushq1.lightmaprgba)
 149                 {
 150                         for (i = 0;i < size;i++, bl += 3)
 151                         {
 152                                 VectorCopy(bl, n);
 153                                 VectorNormalize(n);
 154                                 l = (int)(n[0] * 128 + 128);*out++ = bound(0, l, 255);
 155                                 l = (int)(n[1] * 128 + 128);*out++ = bound(0, l, 255);
 156                                 l = (int)(n[2] * 128 + 128);*out++ = bound(0, l, 255);
 157                                 *out++ = 255;
 158                         }
 159                 }
 160                 else
 161                 {
 162                         for (i = 0;i < size;i++, bl += 3)
 163                         {
 164                                 VectorCopy(bl, n);
 165                                 VectorNormalize(n);
 166                                 l = (int)(n[0] * 128 + 128);*out++ = bound(0, l, 255);
 167                                 l = (int)(n[1] * 128 + 128);*out++ = bound(0, l, 255);
 168                                 l = (int)(n[2] * 128 + 128);*out++ = bound(0, l, 255);
 169                         }
 170                 }
 171                 R_UpdateTexture(surface->deluxemaptexture, templight, surface->lightmapinfo->lightmaporigin[0], surface->lightmapinfo->lightmaporigin[1], smax, tmax);
 172         }
 173 }
 174
 175 void R_StainNode (mnode_t *node, model_t *model, const vec3_t origin, float radius, const float fcolor[8])
 176 {
 177         float ndist, a, ratio, maxdist, maxdist2, maxdist3, invradius, sdtable[256], td, dist2;
 178         msurface_t *surface, *endsurface;
 179         int i, s, t, smax, tmax, smax3, impacts, impactt, stained;
 180         unsigned char *bl;
 181         vec3_t impact;
 182
 183         maxdist = radius * radius;
 184         invradius = 1.0f / radius;
 185
 186 loc0:
 187         if (!node->plane)
 188                 return;
 189         ndist = PlaneDiff(origin, node->plane);
 190         if (ndist > radius)
 191         {
 192                 node = node->children[0];
 193                 goto loc0;
 194         }
 195         if (ndist < -radius)
 196         {
 197                 node = node->children[1];
 198                 goto loc0;
 199         }
 200
 201         dist2 = ndist * ndist;
 202         maxdist3 = maxdist - dist2;
 203
 204         if (node->plane->type < 3)
 205         {
 206                 VectorCopy(origin, impact);
 207                 impact[node->plane->type] -= ndist;
 208         }
 209         else
 210         {
 211                 impact[0] = origin[0] - node->plane->normal[0] * ndist;
 212                 impact[1] = origin[1] - node->plane->normal[1] * ndist;
 213                 impact[2] = origin[2] - node->plane->normal[2] * ndist;
 214         }
 215
 216         for (surface = model->data_surfaces + node->firstsurface, endsurface = surface + node->numsurfaces;surface < endsurface;surface++)
 217         {
 218                 if (surface->lightmapinfo->stainsamples)
 219                 {
 220                         smax = (surface->lightmapinfo->extents[0] >> 4) + 1;
 221                         tmax = (surface->lightmapinfo->extents[1] >> 4) + 1;
 222
 223                         impacts = (int)(DotProduct (impact, surface->lightmapinfo->texinfo->vecs[0]) + surface->lightmapinfo->texinfo->vecs[0][3] - surface->lightmapinfo->texturemins[0]);
 224                         impactt = (int)(DotProduct (impact, surface->lightmapinfo->texinfo->vecs[1]) + surface->lightmapinfo->texinfo->vecs[1][3] - surface->lightmapinfo->texturemins[1]);
 225
 226                         s = bound(0, impacts, smax * 16) - impacts;
 227                         t = bound(0, impactt, tmax * 16) - impactt;
 228                         i = (int)(s * s + t * t + dist2);
 229                         if (i > maxdist)
 230                                 continue;
 231
 232                         // reduce calculations
 233                         for (s = 0, i = impacts; s < smax; s++, i -= 16)
 234                                 sdtable[s] = i * i + dist2;
 235
 236                         bl = surface->lightmapinfo->stainsamples;
 237                         smax3 = smax * 3;
 238                         stained = false;
 239
 240                         i = impactt;
 241                         for (t = 0;t < tmax;t++, i -= 16)
 242                         {
 243                                 td = i * i;
 244                                 // make sure some part of it is visible on this line
 245                                 if (td < maxdist3)
 246                                 {
 247                                         maxdist2 = maxdist - td;
 248                                         for (s = 0;s < smax;s++)
 249                                         {
 250                                                 if (sdtable[s] < maxdist2)
 251                                                 {
 252                                                         ratio = lhrandom(0.0f, 1.0f);
 253                                                         a = (fcolor[3] + ratio * fcolor[7]) * (1.0f - sqrt(sdtable[s] + td) * invradius);
 254                                                         if (a >= (1.0f / 64.0f))
 255                                                         {
 256                                                                 if (a > 1)
 257                                                                         a = 1;
 258                                                                 bl[0] = (unsigned char) ((float) bl[0] + a * ((fcolor[0] + ratio * fcolor[4]) - (float) bl[0]));
 259                                                                 bl[1] = (unsigned char) ((float) bl[1] + a * ((fcolor[1] + ratio * fcolor[5]) - (float) bl[1]));
 260                                                                 bl[2] = (unsigned char) ((float) bl[2] + a * ((fcolor[2] + ratio * fcolor[6]) - (float) bl[2]));
 261                                                                 stained = true;
 262                                                         }
 263                                                 }
 264                                                 bl += 3;
 265                                         }
 266                                 }
 267                                 else // skip line
 268                                         bl += smax3;
 269                         }
 270                         // force lightmap upload
 271                         if (stained)
 272                                 surface->cached_dlight = true;
 273                 }
 274         }
 275
 276         if (node->children[0]->plane)
 277         {
 278                 if (node->children[1]->plane)
 279                 {
 280                         R_StainNode(node->children[0], model, origin, radius, fcolor);
 281                         node = node->children[1];
 282                         goto loc0;
 283                 }
 284                 else
 285                 {
 286                         node = node->children[0];
 287                         goto loc0;
 288                 }
 289         }
 290         else if (node->children[1]->plane)
 291         {
 292                 node = node->children[1];
 293                 goto loc0;
 294         }
 295 }
 296
 297 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)
 298 {
 299         int n;
 300         float fcolor[8];
 301         entity_render_t *ent;
 302         model_t *model;
 303         vec3_t org;
 304         if (r_refdef.worldmodel == NULL || !r_refdef.worldmodel->brush.data_nodes || !r_refdef.worldmodel->brushq1.lightdata)
 305                 return;
 306         fcolor[0] = cr1;
 307         fcolor[1] = cg1;
 308         fcolor[2] = cb1;
 309         fcolor[3] = ca1 * (1.0f / 64.0f);
 310         fcolor[4] = cr2 - cr1;
 311         fcolor[5] = cg2 - cg1;
 312         fcolor[6] = cb2 - cb1;
 313         fcolor[7] = (ca2 - ca1) * (1.0f / 64.0f);
 314
 315         R_StainNode(r_refdef.worldmodel->brush.data_nodes + r_refdef.worldmodel->brushq1.hulls[0].firstclipnode, r_refdef.worldmodel, origin, radius, fcolor);
 316
 317         // look for embedded bmodels
 318         for (n = 0;n < cl.num_brushmodel_entities;n++)
 319         {
 320                 ent = &cl.entities[cl.brushmodel_entities[n]].render;
 321                 model = ent->model;
 322                 if (model && model->name[0] == '*')
 323                 {
 324                         if (model->brush.data_nodes)
 325                         {
 326                                 Matrix4x4_Transform(&ent->inversematrix, origin, org);
 327                                 R_StainNode(model->brush.data_nodes + model->brushq1.hulls[0].firstclipnode, model, org, radius, fcolor);
 328                         }
 329                 }
 330         }
 331 }
 332
 333
 334 /*
 335 =============================================================
 336
 337         BRUSH MODELS
 338
 339 =============================================================
 340 */
 341
 342 static void R_DrawPortal_Callback(const entity_render_t *ent, const rtlight_t *rtlight, int numsurfaces, int *surfacelist)
 343 {
 344         // due to the hacky nature of this function's parameters, this is never
 345         // called with a batch, so numsurfaces is always 1, and the surfacelist
 346         // contains only a leaf number for coloring purposes
 347         const mportal_t *portal = (mportal_t *)ent;
 348         int i, numpoints;
 349         float *v;
 350         float vertex3f[POLYGONELEMENTS_MAXPOINTS*3];
 351         CHECKGLERROR
 352         GL_BlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
 353         GL_DepthMask(false);
 354         GL_DepthRange(0, 1);
 355         GL_DepthTest(true);
 356         GL_CullFace(GL_NONE);
 357         R_Mesh_Matrix(&identitymatrix);
 358
 359         numpoints = min(portal->numpoints, POLYGONELEMENTS_MAXPOINTS);
 360
 361         R_Mesh_VertexPointer(vertex3f, 0, 0);
 362         R_Mesh_ColorPointer(NULL, 0, 0);
 363         R_Mesh_ResetTextureState();
 364
 365         i = surfacelist[0];
 366         GL_Color(((i & 0x0007) >> 0) * (1.0f / 7.0f) * r_view.colorscale,
 367                          ((i & 0x0038) >> 3) * (1.0f / 7.0f) * r_view.colorscale,
 368                          ((i & 0x01C0) >> 6) * (1.0f / 7.0f) * r_view.colorscale,
 369                          0.125f);
 370         for (i = 0, v = vertex3f;i < numpoints;i++, v += 3)
 371                 VectorCopy(portal->points[i].position, v);
 372         R_Mesh_Draw(0, numpoints, numpoints - 2, polygonelements, 0, 0);
 373 }
 374
 375 // LordHavoc: this is just a nice debugging tool, very slow
 376 void R_DrawPortals(void)
 377 {
 378         int i, leafnum;
 379         mportal_t *portal;
 380         float center[3], f;
 381         model_t *model = r_refdef.worldmodel;
 382         if (model == NULL)
 383                 return;
 384         for (leafnum = 0;leafnum < r_refdef.worldmodel->brush.num_leafs;leafnum++)
 385         {
 386                 if (r_viewcache.world_leafvisible[leafnum])
 387                 {
 388                         //for (portalnum = 0, portal = model->brush.data_portals;portalnum < model->brush.num_portals;portalnum++, portal++)
 389                         for (portal = r_refdef.worldmodel->brush.data_leafs[leafnum].portals;portal;portal = portal->next)
 390                         {
 391                                 if (portal->numpoints <= POLYGONELEMENTS_MAXPOINTS)
 392                                 if (!R_CullBox(portal->mins, portal->maxs))
 393                                 {
 394                                         VectorClear(center);
 395                                         for (i = 0;i < portal->numpoints;i++)
 396                                                 VectorAdd(center, portal->points[i].position, center);
 397                                         f = ixtable[portal->numpoints];
 398                                         VectorScale(center, f, center);
 399                                         R_MeshQueue_AddTransparent(center, R_DrawPortal_Callback, (entity_render_t *)portal, leafnum, r_shadow_rtlight);
 400                                 }
 401                         }
 402                 }
 403         }
 404 }
 405
 406 void R_View_WorldVisibility(void)
 407 {
 408         int i, j, *mark;
 409         mleaf_t *leaf;
 410         mleaf_t *viewleaf;
 411         model_t *model = r_refdef.worldmodel;
 412
 413         if (!model)
 414                 return;
 415
 416         // if possible find the leaf the view origin is in
 417         viewleaf = model->brush.PointInLeaf ? model->brush.PointInLeaf(model, r_view.origin) : NULL;
 418         // if possible fetch the visible cluster bits
 419         if (!r_lockpvs.integer && model->brush.FatPVS)
 420                 model->brush.FatPVS(model, r_view.origin, 2, r_viewcache.world_pvsbits, sizeof(r_viewcache.world_pvsbits));
 421
 422         if (!r_lockvisibility.integer)
 423         {
 424                 // clear the visible surface and leaf flags arrays
 425                 memset(r_viewcache.world_surfacevisible, 0, model->num_surfaces);
 426                 memset(r_viewcache.world_leafvisible, 0, model->brush.num_leafs);
 427
 428                 r_viewcache.world_novis = false;
 429
 430                 // if floating around in the void (no pvs data available, and no
 431                 // portals available), simply use all on-screen leafs.
 432                 if (!viewleaf || viewleaf->clusterindex < 0)
 433                 {
 434                         // no visibility method: (used when floating around in the void)
 435                         // simply cull each leaf to the frustum (view pyramid)
 436                         // similar to quake's RecursiveWorldNode but without cache misses
 437                         r_viewcache.world_novis = true;
 438                         for (j = 0, leaf = model->brush.data_leafs;j < model->brush.num_leafs;j++, leaf++)
 439                         {
 440                                 // if leaf is in current pvs and on the screen, mark its surfaces
 441                                 if (!R_CullBox(leaf->mins, leaf->maxs))
 442                                 {
 443                                         r_refdef.stats.world_leafs++;
 444                                         r_viewcache.world_leafvisible[j] = true;
 445                                         if (leaf->numleafsurfaces)
 446                                                 for (i = 0, mark = leaf->firstleafsurface;i < leaf->numleafsurfaces;i++, mark++)
 447                                                         r_viewcache.world_surfacevisible[*mark] = true;
 448                                 }
 449                         }
 450                 }
 451                 // if the user prefers to disable portal culling (testing?), simply
 452                 // use all on-screen leafs that are in the pvs.
 453                 else if (!r_useportalculling.integer)
 454                 {
 455                         // pvs method:
 456                         // simply check if each leaf is in the Potentially Visible Set,
 457                         // and cull to frustum (view pyramid)
 458                         // similar to quake's RecursiveWorldNode but without cache misses
 459                         for (j = 0, leaf = model->brush.data_leafs;j < model->brush.num_leafs;j++, leaf++)
 460                         {
 461                                 // if leaf is in current pvs and on the screen, mark its surfaces
 462                                 if (CHECKPVSBIT(r_viewcache.world_pvsbits, leaf->clusterindex) && !R_CullBox(leaf->mins, leaf->maxs))
 463                                 {
 464                                         r_refdef.stats.world_leafs++;
 465                                         r_viewcache.world_leafvisible[j] = true;
 466                                         if (leaf->numleafsurfaces)
 467                                                 for (i = 0, mark = leaf->firstleafsurface;i < leaf->numleafsurfaces;i++, mark++)
 468                                                         r_viewcache.world_surfacevisible[*mark] = true;
 469                                 }
 470                         }
 471                 }
 472                 // otherwise use a recursive portal flow, culling each portal to
 473                 // frustum and checking if the leaf the portal leads to is in the pvs
 474                 else
 475                 {
 476                         int leafstackpos;
 477                         mportal_t *p;
 478                         mleaf_t *leafstack[8192];
 479                         // simple-frustum portal method:
 480                         // follows portals leading outward from viewleaf, does not venture
 481                         // offscreen or into leafs that are not visible, faster than
 482                         // Quake's RecursiveWorldNode and vastly better in unvised maps,
 483                         // often culls some surfaces that pvs alone would miss
 484                         // (such as a room in pvs that is hidden behind a wall, but the
 485                         //  passage leading to the room is off-screen)
 486                         leafstack[0] = viewleaf;
 487                         leafstackpos = 1;
 488                         while (leafstackpos)
 489                         {
 490                                 leaf = leafstack[--leafstackpos];
 491                                 if (r_viewcache.world_leafvisible[leaf - model->brush.data_leafs])
 492                                         continue;
 493                                 r_refdef.stats.world_leafs++;
 494                                 r_viewcache.world_leafvisible[leaf - model->brush.data_leafs] = true;
 495                                 // mark any surfaces bounding this leaf
 496                                 if (leaf->numleafsurfaces)
 497                                         for (i = 0, mark = leaf->firstleafsurface;i < leaf->numleafsurfaces;i++, mark++)
 498                                                 r_viewcache.world_surfacevisible[*mark] = true;
 499                                 // follow portals into other leafs
 500                                 // the checks are:
 501                                 // if viewer is behind portal (portal faces outward into the scene)
 502                                 // and the portal polygon's bounding box is on the screen
 503                                 // and the leaf has not been visited yet
 504                                 // and the leaf is visible in the pvs
 505                                 // (the first two checks won't cause as many cache misses as the leaf checks)
 506                                 for (p = leaf->portals;p;p = p->next)
 507                                 {
 508                                         r_refdef.stats.world_portals++;
 509                                         if (DotProduct(r_view.origin, p->plane.normal) < (p->plane.dist + 1)
 510                                          && !r_viewcache.world_leafvisible[p->past - model->brush.data_leafs]
 511                                          && CHECKPVSBIT(r_viewcache.world_pvsbits, p->past->clusterindex)
 512                                          && !R_CullBox(p->mins, p->maxs)
 513                                          && leafstackpos < (int)(sizeof(leafstack) / sizeof(leafstack[0])))
 514                                                 leafstack[leafstackpos++] = p->past;
 515                                 }
 516                         }
 517                 }
 518         }
 519 }
 520
 521 void R_Q1BSP_DrawSky(entity_render_t *ent)
 522 {
 523         if (ent->model == NULL)
 524                 return;
 525         if (ent == r_refdef.worldentity)
 526                 R_DrawWorldSurfaces(true, true, false);
 527         else
 528                 R_DrawModelSurfaces(ent, true, true, false);
 529 }
 530
 531 void R_Q1BSP_Draw(entity_render_t *ent)
 532 {
 533         model_t *model = ent->model;
 534         if (model == NULL)
 535                 return;
 536         if (ent == r_refdef.worldentity)
 537                 R_DrawWorldSurfaces(false, true, false);
 538         else
 539                 R_DrawModelSurfaces(ent, false, true, false);
 540 }
 541
 542 void R_Q1BSP_DrawDepth(entity_render_t *ent)
 543 {
 544         model_t *model = ent->model;
 545         if (model == NULL)
 546                 return;
 547         if (ent == r_refdef.worldentity)
 548                 R_DrawWorldSurfaces(false, false, true);
 549         else
 550                 R_DrawModelSurfaces(ent, false, false, true);
 551 }
 552
 553 typedef struct r_q1bsp_getlightinfo_s
 554 {
 555         model_t *model;
 556         vec3_t relativelightorigin;
 557         float lightradius;
 558         int *outleaflist;
 559         unsigned char *outleafpvs;
 560         int outnumleafs;
 561         int *outsurfacelist;
 562         unsigned char *outsurfacepvs;
 563         unsigned char *tempsurfacepvs;
 564         unsigned char *outshadowtrispvs;
 565         unsigned char *outlighttrispvs;
 566         int outnumsurfaces;
 567         vec3_t outmins;
 568         vec3_t outmaxs;
 569         vec3_t lightmins;
 570         vec3_t lightmaxs;
 571         const unsigned char *pvs;
 572         qboolean svbsp_active;
 573         qboolean svbsp_insertoccluder;
 574 }
 575 r_q1bsp_getlightinfo_t;
 576
 577 void R_Q1BSP_RecursiveGetLightInfo(r_q1bsp_getlightinfo_t *info, mnode_t *node)
 578 {
 579         int sides;
 580         mleaf_t *leaf;
 581         for (;;)
 582         {
 583                 mplane_t *plane = node->plane;
 584                 //if (!BoxesOverlap(info->lightmins, info->lightmaxs, node->mins, node->maxs))
 585                 //      return;
 586                 if (!plane)
 587                         break;
 588                 //if (!r_shadow_compilingrtlight && R_CullBoxCustomPlanes(node->mins, node->maxs, r_shadow_rtlight_numfrustumplanes, r_shadow_rtlight_frustumplanes))
 589                 //      return;
 590                 if (plane->type < 3)
 591                 {
 592                         if (info->lightmins[plane->type] > plane->dist)
 593                                 node = node->children[0];
 594                         else if (info->lightmaxs[plane->type] < plane->dist)
 595                                 node = node->children[1];
 596                         else if (info->relativelightorigin[plane->type] >= plane->dist)
 597                         {
 598                                 R_Q1BSP_RecursiveGetLightInfo(info, node->children[0]);
 599                                 node = node->children[1];
 600                         }
 601                         else
 602                         {
 603                                 R_Q1BSP_RecursiveGetLightInfo(info, node->children[1]);
 604                                 node = node->children[0];
 605                         }
 606                 }
 607                 else
 608                 {
 609                         sides = BoxOnPlaneSide(info->lightmins, info->lightmaxs, plane);
 610                         if (sides == 3)
 611                         {
 612                                 // recurse front side first because the svbsp building prefers it
 613                                 if (PlaneDist(info->relativelightorigin, plane) >= 0)
 614                                 {
 615                                         R_Q1BSP_RecursiveGetLightInfo(info, node->children[0]);
 616                                         node = node->children[1];
 617                                 }
 618                                 else
 619                                 {
 620                                         R_Q1BSP_RecursiveGetLightInfo(info, node->children[1]);
 621                                         node = node->children[0];
 622                                 }
 623                         }
 624                         else if (sides == 0)
 625                                 return; // ERROR: NAN bounding box!
 626                         else
 627                                 node = node->children[sides - 1];
 628                 }
 629         }
 630         if (!r_shadow_compilingrtlight && R_CullBoxCustomPlanes(node->mins, node->maxs, r_shadow_rtlight_numfrustumplanes, r_shadow_rtlight_frustumplanes))
 631                 return;
 632         leaf = (mleaf_t *)node;
 633         if (info->svbsp_active)
 634         {
 635                 int i;
 636                 mportal_t *portal;
 637                 double points[128][3];
 638                 for (portal = leaf->portals;portal;portal = portal->next)
 639                 {
 640                         for (i = 0;i < portal->numpoints;i++)
 641                                 VectorCopy(portal->points[i].position, points[i]);
 642                         if (SVBSP_AddPolygon(&r_svbsp, portal->numpoints, points[0], false, NULL, NULL, 0) & 2)
 643                                 break;
 644                 }
 645                 if (portal == NULL)
 646                         return; // no portals of this leaf visible
 647         }
 648         else
 649         {
 650                 if (r_shadow_frontsidecasting.integer && info->pvs != NULL && !CHECKPVSBIT(info->pvs, leaf->clusterindex))
 651                         return;
 652         }
 653         // inserting occluders does not alter the leaf info
 654         if (!info->svbsp_insertoccluder)
 655         {
 656                 info->outmins[0] = min(info->outmins[0], leaf->mins[0]);
 657                 info->outmins[1] = min(info->outmins[1], leaf->mins[1]);
 658                 info->outmins[2] = min(info->outmins[2], leaf->mins[2]);
 659                 info->outmaxs[0] = max(info->outmaxs[0], leaf->maxs[0]);
 660                 info->outmaxs[1] = max(info->outmaxs[1], leaf->maxs[1]);
 661                 info->outmaxs[2] = max(info->outmaxs[2], leaf->maxs[2]);
 662                 if (info->outleafpvs)
 663                 {
 664                         int leafindex = leaf - info->model->brush.data_leafs;
 665                         if (!CHECKPVSBIT(info->outleafpvs, leafindex))
 666                         {
 667                                 SETPVSBIT(info->outleafpvs, leafindex);
 668                                 info->outleaflist[info->outnumleafs++] = leafindex;
 669                         }
 670                 }
 671         }
 672         if (info->outsurfacepvs)
 673         {
 674                 int leafsurfaceindex;
 675                 int surfaceindex;
 676                 int triangleindex, t;
 677                 msurface_t *surface;
 678                 const int *e;
 679                 const vec_t *v[3];
 680                 double v2[3][3];
 681                 for (leafsurfaceindex = 0;leafsurfaceindex < leaf->numleafsurfaces;leafsurfaceindex++)
 682                 {
 683                         surfaceindex = leaf->firstleafsurface[leafsurfaceindex];
 684                         if (!CHECKPVSBIT(info->outsurfacepvs, surfaceindex))
 685                         {
 686                                 surface = info->model->data_surfaces + surfaceindex;
 687                                 if (BoxesOverlap(info->lightmins, info->lightmaxs, surface->mins, surface->maxs)
 688                                  && (!info->svbsp_insertoccluder || !(surface->texture->currentframe->currentmaterialflags & MATERIALFLAG_NOSHADOW)))
 689                                 {
 690                                         qboolean addedtris = false;
 691                                         qboolean insidebox = BoxInsideBox(surface->mins, surface->maxs, info->lightmins, info->lightmaxs);
 692                                         for (triangleindex = 0, t = surface->num_firstshadowmeshtriangle, e = info->model->brush.shadowmesh->element3i + t * 3;triangleindex < surface->num_triangles;triangleindex++, t++, e += 3)
 693                                         {
 694                                                 v[0] = info->model->brush.shadowmesh->vertex3f + e[0] * 3;
 695                                                 v[1] = info->model->brush.shadowmesh->vertex3f + e[1] * 3;
 696                                                 v[2] = info->model->brush.shadowmesh->vertex3f + e[2] * 3;
 697                                                 if (insidebox || TriangleOverlapsBox(v[0], v[1], v[2], info->lightmins, info->lightmaxs))
 698                                                 {
 699                                                         if (info->svbsp_insertoccluder)
 700                                                         {
 701                                                                 if (!(surface->texture->currentframe->currentmaterialflags & MATERIALFLAG_NOCULLFACE) && r_shadow_frontsidecasting.integer != PointInfrontOfTriangle(info->relativelightorigin, v[0], v[1], v[2]))
 702                                                                         continue;
 703                                                                 if (surface->texture->currentframe->currentmaterialflags & MATERIALFLAG_NOSHADOW)
 704                                                                         continue;
 705                                                                 VectorCopy(v[0], v2[0]);
 706                                                                 VectorCopy(v[1], v2[1]);
 707                                                                 VectorCopy(v[2], v2[2]);
 708                                                                 if (!(SVBSP_AddPolygon(&r_svbsp, 3, v2[0], true, NULL, NULL, 0) & 2))
 709                                                                         continue;
 710                                                                 addedtris = true;
 711                                                         }
 712                                                         else
 713                                                         {
 714                                                                 if (info->svbsp_active)
 715                                                                 {
 716                                                                         VectorCopy(v[0], v2[0]);
 717                                                                         VectorCopy(v[1], v2[1]);
 718                                                                         VectorCopy(v[2], v2[2]);
 719                                                                         if (!(SVBSP_AddPolygon(&r_svbsp, 3, v2[0], false, NULL, NULL, 0) & 2))
 720                                                                                 continue;
 721                                                                 }
 722                                                                 if (surface->texture->currentframe->currentmaterialflags & MATERIALFLAG_NOCULLFACE)
 723                                                                 {
 724                                                                         // if the material is double sided we
 725                                                                         // can't cull by direction
 726                                                                         SETPVSBIT(info->outlighttrispvs, t);
 727                                                                         addedtris = true;
 728                                                                         if (!(surface->texture->currentframe->currentmaterialflags & MATERIALFLAG_NOSHADOW))
 729                                                                                 SETPVSBIT(info->outshadowtrispvs, t);
 730                                                                 }
 731                                                                 else if (r_shadow_frontsidecasting.integer)
 732                                                                 {
 733                                                                         // front side casting occludes backfaces,
 734                                                                         // so they are completely useless as both
 735                                                                         // casters and lit polygons
 736                                                                         if (!PointInfrontOfTriangle(info->relativelightorigin, v[0], v[1], v[2]))
 737                                                                                 continue;
 738                                                                         SETPVSBIT(info->outlighttrispvs, t);
 739                                                                         addedtris = true;
 740                                                                         if (!(surface->texture->currentframe->currentmaterialflags & MATERIALFLAG_NOSHADOW))
 741                                                                                 SETPVSBIT(info->outshadowtrispvs, t);
 742                                                                 }
 743                                                                 else
 744                                                                 {
 745                                                                         // back side casting does not occlude
 746                                                                         // anything so we can't cull lit polygons
 747                                                                         SETPVSBIT(info->outlighttrispvs, t);
 748                                                                         addedtris = true;
 749                                                                         if (!PointInfrontOfTriangle(info->relativelightorigin, v[0], v[1], v[2]) && !(surface->texture->currentframe->currentmaterialflags & MATERIALFLAG_NOSHADOW))
 750                                                                                 SETPVSBIT(info->outshadowtrispvs, t);
 751                                                                 }
 752                                                         }
 753                                                 }
 754                                         }
 755                                         if (addedtris)
 756                                         {
 757                                                 SETPVSBIT(info->outsurfacepvs, surfaceindex);
 758                                                 info->outsurfacelist[info->outnumsurfaces++] = surfaceindex;
 759                                         }
 760                                 }
 761                         }
 762                 }
 763         }
 764 }
 765
 766 void R_Q1BSP_CallRecursiveGetLightInfo(r_q1bsp_getlightinfo_t *info, qboolean use_svbsp)
 767 {
 768         if (use_svbsp)
 769         {
 770                 double origin[3];
 771                 VectorCopy(info->relativelightorigin, origin);
 772                 if (!r_svbsp.nodes)
 773                 {
 774                         r_svbsp.maxnodes = max(r_svbsp.maxnodes, 1<<18);
 775                         r_svbsp.nodes = Mem_Alloc(r_main_mempool, r_svbsp.maxnodes * sizeof(svbsp_node_t));
 776                 }
 777                 info->svbsp_active = true;
 778                 info->svbsp_insertoccluder = true;
 779                 for (;;)
 780                 {
 781                         SVBSP_Init(&r_svbsp, origin, r_svbsp.maxnodes, r_svbsp.nodes);
 782                         R_Q1BSP_RecursiveGetLightInfo(info, info->model->brush.data_nodes);
 783                         // if that failed, retry with more nodes
 784                         if (r_svbsp.ranoutofnodes)
 785                         {
 786                                 // an upper limit is imposed
 787                                 if (r_svbsp.maxnodes >= 2<<22)
 788                                         break;
 789                                 Mem_Free(r_svbsp.nodes);
 790                                 r_svbsp.maxnodes *= 2;
 791                                 r_svbsp.nodes = Mem_Alloc(tempmempool, r_svbsp.maxnodes * sizeof(svbsp_node_t));
 792                         }
 793                         else
 794                                 break;
 795                 }
 796                 // now clear the surfacepvs array because we need to redo it
 797                 memset(info->outsurfacepvs, 0, (info->model->nummodelsurfaces + 7) >> 3);
 798                 info->outnumsurfaces = 0;
 799         }
 800         else
 801                 info->svbsp_active = false;
 802
 803         // we HAVE to mark the leaf the light is in as lit, because portals are
 804         // irrelevant to a leaf that the light source is inside of
 805         // (and they are all facing away, too)
 806         {
 807                 mnode_t *node = info->model->brush.data_nodes;
 808                 mleaf_t *leaf;
 809                 while (node->plane)
 810                         node = node->children[(node->plane->type < 3 ? info->relativelightorigin[node->plane->type] : DotProduct(info->relativelightorigin,node->plane->normal)) < node->plane->dist];
 811                 leaf = (mleaf_t *)node;
 812                 info->outmins[0] = min(info->outmins[0], leaf->mins[0]);
 813                 info->outmins[1] = min(info->outmins[1], leaf->mins[1]);
 814                 info->outmins[2] = min(info->outmins[2], leaf->mins[2]);
 815                 info->outmaxs[0] = max(info->outmaxs[0], leaf->maxs[0]);
 816                 info->outmaxs[1] = max(info->outmaxs[1], leaf->maxs[1]);
 817                 info->outmaxs[2] = max(info->outmaxs[2], leaf->maxs[2]);
 818                 if (info->outleafpvs)
 819                 {
 820                         int leafindex = leaf - info->model->brush.data_leafs;
 821                         if (!CHECKPVSBIT(info->outleafpvs, leafindex))
 822                         {
 823                                 SETPVSBIT(info->outleafpvs, leafindex);
 824                                 info->outleaflist[info->outnumleafs++] = leafindex;
 825                         }
 826                 }
 827         }
 828
 829         info->svbsp_insertoccluder = false;
 830         R_Q1BSP_RecursiveGetLightInfo(info, info->model->brush.data_nodes);
 831         if (developer.integer >= 100 && use_svbsp)
 832         {
 833                 Con_Printf("GetLightInfo: svbsp built with %i nodes, polygon stats:\n", r_svbsp.numnodes);
 834                 Con_Printf("occluders: %i accepted, %i rejected, %i fragments accepted, %i fragments rejected.\n", r_svbsp.stat_occluders_accepted, r_svbsp.stat_occluders_rejected, r_svbsp.stat_occluders_fragments_accepted, r_svbsp.stat_occluders_fragments_rejected);
 835                 Con_Printf("queries  : %i accepted, %i rejected, %i fragments accepted, %i fragments rejected.\n", r_svbsp.stat_queries_accepted, r_svbsp.stat_queries_rejected, r_svbsp.stat_queries_fragments_accepted, r_svbsp.stat_queries_fragments_rejected);
 836         }
 837 }
 838
 839 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, unsigned char *outshadowtrispvs, unsigned char *outlighttrispvs)
 840 {
 841         r_q1bsp_getlightinfo_t info;
 842         VectorCopy(relativelightorigin, info.relativelightorigin);
 843         info.lightradius = lightradius;
 844         info.lightmins[0] = info.relativelightorigin[0] - info.lightradius;
 845         info.lightmins[1] = info.relativelightorigin[1] - info.lightradius;
 846         info.lightmins[2] = info.relativelightorigin[2] - info.lightradius;
 847         info.lightmaxs[0] = info.relativelightorigin[0] + info.lightradius;
 848         info.lightmaxs[1] = info.relativelightorigin[1] + info.lightradius;
 849         info.lightmaxs[2] = info.relativelightorigin[2] + info.lightradius;
 850         if (ent->model == NULL)
 851         {
 852                 VectorCopy(info.lightmins, outmins);
 853                 VectorCopy(info.lightmaxs, outmaxs);
 854                 *outnumleafspointer = 0;
 855                 *outnumsurfacespointer = 0;
 856                 return;
 857         }
 858         info.model = ent->model;
 859         info.outleaflist = outleaflist;
 860         info.outleafpvs = outleafpvs;
 861         info.outnumleafs = 0;
 862         info.outsurfacelist = outsurfacelist;
 863         info.outsurfacepvs = outsurfacepvs;
 864         info.outshadowtrispvs = outshadowtrispvs;
 865         info.outlighttrispvs = outlighttrispvs;
 866         info.outnumsurfaces = 0;
 867         VectorCopy(info.relativelightorigin, info.outmins);
 868         VectorCopy(info.relativelightorigin, info.outmaxs);
 869         memset(outleafpvs, 0, (info.model->brush.num_leafs + 7) >> 3);
 870         memset(outsurfacepvs, 0, (info.model->nummodelsurfaces + 7) >> 3);
 871         if (info.model->brush.shadowmesh)
 872                 memset(outshadowtrispvs, 0, (info.model->brush.shadowmesh->numtriangles + 7) >> 3);
 873         else
 874                 memset(outshadowtrispvs, 0, (info.model->surfmesh.num_triangles + 7) >> 3);
 875         memset(outlighttrispvs, 0, (info.model->surfmesh.num_triangles + 7) >> 3);
 876         if (info.model->brush.GetPVS && r_shadow_frontsidecasting.integer)
 877                 info.pvs = info.model->brush.GetPVS(info.model, info.relativelightorigin);
 878         else
 879                 info.pvs = NULL;
 880         R_UpdateAllTextureInfo(ent);
 881
 882         if (r_shadow_frontsidecasting.integer && r_shadow_compilingrtlight && r_shadow_realtime_world_compileportalculling.integer)
 883         {
 884                 // use portal recursion for exact light volume culling, and exact surface checking
 885                 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, info.outshadowtrispvs, info.outlighttrispvs);
 886         }
 887         else if (r_shadow_frontsidecasting.integer && r_shadow_realtime_dlight_portalculling.integer)
 888         {
 889                 // use portal recursion for exact light volume culling, but not the expensive exact surface checking
 890                 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, info.outshadowtrispvs, info.outlighttrispvs);
 891         }
 892         else
 893         {
 894                 // recurse the bsp tree, checking leafs and surfaces for visibility
 895                 // optionally using svbsp for exact culling of compiled lights
 896                 // (or if the user enables dlight svbsp culling, which is mostly for
 897                 //  debugging not actual use)
 898                 R_Q1BSP_CallRecursiveGetLightInfo(&info, r_shadow_compilingrtlight ? r_shadow_realtime_world_compilesvbsp.integer : r_shadow_realtime_dlight_svbspculling.integer);
 899         }
 900
 901         // limit combined leaf box to light boundaries
 902         outmins[0] = max(info.outmins[0] - 1, info.lightmins[0]);
 903         outmins[1] = max(info.outmins[1] - 1, info.lightmins[1]);
 904         outmins[2] = max(info.outmins[2] - 1, info.lightmins[2]);
 905         outmaxs[0] = min(info.outmaxs[0] + 1, info.lightmaxs[0]);
 906         outmaxs[1] = min(info.outmaxs[1] + 1, info.lightmaxs[1]);
 907         outmaxs[2] = min(info.outmaxs[2] + 1, info.lightmaxs[2]);
 908
 909         *outnumleafspointer = info.outnumleafs;
 910         *outnumsurfacespointer = info.outnumsurfaces;
 911 }
 912
 913 void R_Q1BSP_CompileShadowVolume(entity_render_t *ent, vec3_t relativelightorigin, vec3_t relativelightdirection, float lightradius, int numsurfaces, const int *surfacelist)
 914 {
 915         model_t *model = ent->model;
 916         msurface_t *surface;
 917         int surfacelistindex;
 918         float projectdistance = relativelightdirection ? lightradius : lightradius + model->radius*2 + r_shadow_projectdistance.value;
 919         r_shadow_compilingrtlight->static_meshchain_shadow = Mod_ShadowMesh_Begin(r_main_mempool, 32768, 32768, NULL, NULL, NULL, false, false, true);
 920         R_Shadow_PrepareShadowMark(model->brush.shadowmesh->numtriangles);
 921         for (surfacelistindex = 0;surfacelistindex < numsurfaces;surfacelistindex++)
 922         {
 923                 surface = model->data_surfaces + surfacelist[surfacelistindex];
 924                 if (surface->texture->currentframe->basematerialflags & MATERIALFLAG_NOSHADOW)
 925                         continue;
 926                 R_Shadow_MarkVolumeFromBox(surface->num_firstshadowmeshtriangle, surface->num_triangles, model->brush.shadowmesh->vertex3f, model->brush.shadowmesh->element3i, relativelightorigin, relativelightdirection, r_shadow_compilingrtlight->cullmins, r_shadow_compilingrtlight->cullmaxs, surface->mins, surface->maxs);
 927         }
 928         R_Shadow_VolumeFromList(model->brush.shadowmesh->numverts, model->brush.shadowmesh->numtriangles, model->brush.shadowmesh->vertex3f, model->brush.shadowmesh->element3i, model->brush.shadowmesh->neighbor3i, relativelightorigin, relativelightdirection, projectdistance, numshadowmark, shadowmarklist);
 929         r_shadow_compilingrtlight->static_meshchain_shadow = Mod_ShadowMesh_Finish(r_main_mempool, r_shadow_compilingrtlight->static_meshchain_shadow, false, false, true);
 930 }
 931
 932 void R_Q1BSP_DrawShadowVolume(entity_render_t *ent, vec3_t relativelightorigin, vec3_t relativelightdirection, float lightradius, int modelnumsurfaces, const int *modelsurfacelist, const vec3_t lightmins, const vec3_t lightmaxs)
 933 {
 934         model_t *model = ent->model;
 935         msurface_t *surface;
 936         int modelsurfacelistindex;
 937         float projectdistance = relativelightdirection ? lightradius : lightradius + model->radius*2 + r_shadow_projectdistance.value;
 938         // check the box in modelspace, it was already checked in worldspace
 939         if (!BoxesOverlap(model->normalmins, model->normalmaxs, lightmins, lightmaxs))
 940                 return;
 941         R_UpdateAllTextureInfo(ent);
 942         if (model->brush.shadowmesh)
 943         {
 944                 R_Shadow_PrepareShadowMark(model->brush.shadowmesh->numtriangles);
 945                 for (modelsurfacelistindex = 0;modelsurfacelistindex < modelnumsurfaces;modelsurfacelistindex++)
 946                 {
 947                         surface = model->data_surfaces + modelsurfacelist[modelsurfacelistindex];
 948                         if (surface->texture->currentframe->currentmaterialflags & MATERIALFLAG_NOSHADOW)
 949                                 continue;
 950                         R_Shadow_MarkVolumeFromBox(surface->num_firstshadowmeshtriangle, surface->num_triangles, model->brush.shadowmesh->vertex3f, model->brush.shadowmesh->element3i, relativelightorigin, relativelightdirection, lightmins, lightmaxs, surface->mins, surface->maxs);
 951                 }
 952                 R_Shadow_VolumeFromList(model->brush.shadowmesh->numverts, model->brush.shadowmesh->numtriangles, model->brush.shadowmesh->vertex3f, model->brush.shadowmesh->element3i, model->brush.shadowmesh->neighbor3i, relativelightorigin, relativelightdirection, projectdistance, numshadowmark, shadowmarklist);
 953         }
 954         else
 955         {
 956                 projectdistance = lightradius + model->radius*2;
 957                 R_Shadow_PrepareShadowMark(model->surfmesh.num_triangles);
 958                 // identify lit faces within the bounding box
 959                 for (modelsurfacelistindex = 0;modelsurfacelistindex < modelnumsurfaces;modelsurfacelistindex++)
 960                 {
 961                         surface = model->data_surfaces + modelsurfacelist[modelsurfacelistindex];
 962                         rsurface_texture = surface->texture->currentframe;
 963                         if (rsurface_texture->currentmaterialflags & MATERIALFLAG_NOSHADOW)
 964                                 continue;
 965                         RSurf_PrepareVerticesForBatch(false, false, 1, &surface);
 966                         R_Shadow_MarkVolumeFromBox(surface->num_firsttriangle, surface->num_triangles, rsurface_vertex3f, rsurface_model->surfmesh.data_element3i, relativelightorigin, relativelightdirection, lightmins, lightmaxs, surface->mins, surface->maxs);
 967                 }
 968                 R_Shadow_VolumeFromList(model->surfmesh.num_vertices, model->surfmesh.num_triangles, rsurface_vertex3f, model->surfmesh.data_element3i, model->surfmesh.data_neighbor3i, relativelightorigin, relativelightdirection, projectdistance, numshadowmark, shadowmarklist);
 969         }
 970 }
 971
 972 #define BATCHSIZE 1024
 973
 974 static void R_Q1BSP_DrawLight_TransparentCallback(const entity_render_t *ent, const rtlight_t *rtlight, int numsurfaces, int *surfacelist)
 975 {
 976         int i, j, endsurface;
 977         texture_t *t;
 978         msurface_t *surface;
 979         // note: in practice this never actually receives batches), oh well
 980         R_Shadow_RenderMode_Begin();
 981         R_Shadow_RenderMode_ActiveLight((rtlight_t *)rtlight);
 982         R_Shadow_RenderMode_Lighting(false, true);
 983         R_Shadow_SetupEntityLight(ent);
 984         for (i = 0;i < numsurfaces;i = j)
 985         {
 986                 j = i + 1;
 987                 surface = rsurface_model->data_surfaces + surfacelist[i];
 988                 t = surface->texture;
 989                 R_UpdateTextureInfo(ent, t);
 990                 rsurface_texture = t->currentframe;
 991                 endsurface = min(j + BATCHSIZE, numsurfaces);
 992                 for (j = i;j < endsurface;j++)
 993                 {
 994                         surface = rsurface_model->data_surfaces + surfacelist[j];
 995                         if (t != surface->texture)
 996                                 break;
 997                         RSurf_PrepareVerticesForBatch(true, true, 1, &surface);
 998                         R_Shadow_RenderLighting(surface->num_firstvertex, surface->num_vertices, surface->num_triangles, ent->model->surfmesh.data_element3i + surface->num_firsttriangle * 3, ent->model->surfmesh.ebo, (sizeof(int[3]) * surface->num_firsttriangle));
 999                 }
1000         }
1001         R_Shadow_RenderMode_End();
1002 }
1003
1004 #define RSURF_MAX_BATCHSURFACES 1024
1005
1006 void R_Q1BSP_DrawLight(entity_render_t *ent, int numsurfaces, const int *surfacelist, const unsigned char *trispvs)
1007 {
1008         model_t *model = ent->model;
1009         msurface_t *surface;
1010         int i, k, l, m, mend, endsurface, batchnumsurfaces, batchnumtriangles, batchfirstvertex, batchlastvertex;
1011         qboolean usebufferobject, culltriangles;
1012         const int *element3i;
1013         msurface_t *batchsurfacelist[RSURF_MAX_BATCHSURFACES];
1014         int batchelements[BATCHSIZE*3];
1015         texture_t *tex;
1016         CHECKGLERROR
1017         RSurf_ActiveModelEntity(ent, true, true);
1018         R_UpdateAllTextureInfo(ent);
1019         CHECKGLERROR
1020         culltriangles = r_shadow_culltriangles.integer && !(ent->flags & RENDER_NOSELFSHADOW);
1021         element3i = rsurface_model->surfmesh.data_element3i;
1022         // this is a double loop because non-visible surface skipping has to be
1023         // fast, and even if this is not the world model (and hence no visibility
1024         // checking) the input surface list and batch buffer are different formats
1025         // so some processing is necessary.  (luckily models have few surfaces)
1026         for (i = 0;i < numsurfaces;)
1027         {
1028                 batchnumsurfaces = 0;
1029                 endsurface = min(i + RSURF_MAX_BATCHSURFACES, numsurfaces);
1030                 if (ent == r_refdef.worldentity)
1031                 {
1032                         for (;i < endsurface;i++)
1033                                 if (r_viewcache.world_surfacevisible[surfacelist[i]])
1034                                         batchsurfacelist[batchnumsurfaces++] = model->data_surfaces + surfacelist[i];
1035                 }
1036                 else
1037                 {
1038                         for (;i < endsurface;i++)
1039                                 batchsurfacelist[batchnumsurfaces++] = model->data_surfaces + surfacelist[i];
1040                 }
1041                 if (!batchnumsurfaces)
1042                         continue;
1043                 for (k = 0;k < batchnumsurfaces;k = l)
1044                 {
1045                         surface = batchsurfacelist[k];
1046                         tex = surface->texture;
1047                         rsurface_texture = tex->currentframe;
1048                         if (rsurface_texture->currentmaterialflags & (MATERIALFLAG_WALL | MATERIALFLAG_WATER))
1049                         {
1050                                 if (rsurface_texture->currentmaterialflags & MATERIALFLAGMASK_DEPTHSORTED)
1051                                 {
1052                                         vec3_t tempcenter, center;
1053                                         for (l = k;l < batchnumsurfaces && tex == batchsurfacelist[l]->texture;l++)
1054                                         {
1055                                                 surface = batchsurfacelist[l];
1056                                                 tempcenter[0] = (surface->mins[0] + surface->maxs[0]) * 0.5f;
1057                                                 tempcenter[1] = (surface->mins[1] + surface->maxs[1]) * 0.5f;
1058                                                 tempcenter[2] = (surface->mins[2] + surface->maxs[2]) * 0.5f;
1059                                                 Matrix4x4_Transform(&rsurface_matrix, tempcenter, center);
1060                                                 R_MeshQueue_AddTransparent(rsurface_texture->currentmaterialflags & MATERIALFLAG_NODEPTHTEST ? r_view.origin : center, R_Q1BSP_DrawLight_TransparentCallback, ent, surface - rsurface_model->data_surfaces, r_shadow_rtlight);
1061                                         }
1062                                 }
1063                                 else
1064                                 {
1065                                         // use the bufferobject if all triangles are accepted
1066                                         usebufferobject = true;
1067                                         batchnumtriangles = 0;
1068                                         // note: this only accepts consecutive surfaces because
1069                                         // non-consecutive surfaces often have extreme vertex
1070                                         // ranges (due to large numbers of surfaces omitted
1071                                         // between them)
1072                                         surface = batchsurfacelist[k];
1073                                         for (l = k;l < batchnumsurfaces && surface == batchsurfacelist[l] && tex == surface->texture;l++, surface++)
1074                                         {
1075                                                 RSurf_PrepareVerticesForBatch(true, true, 1, &surface);
1076                                                 for (m = surface->num_firsttriangle, mend = m + surface->num_triangles;m < mend;m++)
1077                                                 {
1078                                                         if (culltriangles)
1079                                                         {
1080                                                                 if (trispvs)
1081                                                                 {
1082                                                                         if (!CHECKPVSBIT(trispvs, m))
1083                                                                         {
1084                                                                                 usebufferobject = false;
1085                                                                                 continue;
1086                                                                         }
1087                                                                 }
1088                                                                 else
1089                                                                 {
1090                                                                         if (r_shadow_frontsidecasting.integer && !PointInfrontOfTriangle(r_shadow_entitylightorigin, rsurface_vertex3f + element3i[m*3+0]*3, rsurface_vertex3f + element3i[m*3+1]*3, rsurface_vertex3f + element3i[m*3+2]*3))
1091                                                                         {
1092                                                                                 usebufferobject = false;
1093                                                                                 continue;
1094                                                                         }
1095                                                                 }
1096                                                         }
1097                                                         batchelements[batchnumtriangles*3+0] = element3i[m*3+0];
1098                                                         batchelements[batchnumtriangles*3+1] = element3i[m*3+1];
1099                                                         batchelements[batchnumtriangles*3+2] = element3i[m*3+2];
1100                                                         batchnumtriangles++;
1101                                                         r_refdef.stats.lights_lighttriangles++;
1102                                                         if (batchnumtriangles >= BATCHSIZE)
1103                                                         {
1104                                                                 Mod_VertexRangeFromElements(batchnumtriangles*3, batchelements, &batchfirstvertex, &batchlastvertex);
1105                                                                 R_Shadow_RenderLighting(batchfirstvertex, batchlastvertex + 1 - batchfirstvertex, batchnumtriangles, batchelements, 0, 0);
1106                                                                 batchnumtriangles = 0;
1107                                                                 usebufferobject = false;
1108                                                         }
1109                                                 }
1110                                                 r_refdef.stats.lights_lighttriangles += batchsurfacelist[l]->num_triangles;
1111                                         }
1112                                         if (batchnumtriangles > 0)
1113                                         {
1114                                                 Mod_VertexRangeFromElements(batchnumtriangles*3, batchelements, &batchfirstvertex, &batchlastvertex);
1115                                                 if (usebufferobject)
1116                                                         R_Shadow_RenderLighting(batchfirstvertex, batchlastvertex + 1 - batchfirstvertex, batchnumtriangles, batchelements, ent->model->surfmesh.ebo, sizeof(int[3]) * batchsurfacelist[k]->num_firsttriangle);
1117                                                 else
1118                                                         R_Shadow_RenderLighting(batchfirstvertex, batchlastvertex + 1 - batchfirstvertex, batchnumtriangles, batchelements, 0, 0);
1119                                         }
1120                                 }
1121                         }
1122                         else
1123                         {
1124                                 // skip ahead to the next texture
1125                                 for (l = k;l < batchnumsurfaces && tex == batchsurfacelist[l]->texture;l++)
1126                                         ;
1127                         }
1128                 }
1129         }
1130 }
1131
1132 //Made by [515]
1133 void R_ReplaceWorldTexture (void)
1134 {
1135         model_t         *m;
1136         texture_t       *t;
1137         int                     i;
1138         const char      *r, *newt;
1139         skinframe_t *skinframe;
1140         m = r_refdef.worldmodel;
1141
1142         if(Cmd_Argc() < 2)
1143         {
1144                 Con_Print("r_replacemaptexture <texname> <newtexname> - replaces texture\n");
1145                 Con_Print("r_replacemaptexture <texname> - switch back to default texture\n");
1146                 return;
1147         }
1148         if(!cl.islocalgame || !cl.worldmodel)
1149         {
1150                 Con_Print("This command works only in singleplayer\n");
1151                 return;
1152         }
1153         r = Cmd_Argv(1);
1154         newt = Cmd_Argv(2);
1155         if(!newt[0])
1156                 newt = r;
1157         for(i=0,t=m->data_textures;i<m->num_textures;i++,t++)
1158         {
1159                 if(t->width && !strcasecmp(t->name, r))
1160                 {
1161                         if ((skinframe = R_SkinFrame_LoadExternal((char*)newt, TEXF_MIPMAP | TEXF_ALPHA | TEXF_PRECACHE | TEXF_PICMIP, true)))
1162                         {
1163                                 t->skinframes[0] = skinframe;
1164                                 Con_Printf("%s replaced with %s\n", r, newt);
1165                                 return;
1166                         }
1167                         else
1168                         {
1169                                 Con_Printf("%s was not found\n", newt);
1170                                 return;
1171                         }
1172                 }
1173         }
1174 }
1175
1176 //Made by [515]
1177 void R_ListWorldTextures (void)
1178 {
1179         model_t         *m;
1180         texture_t       *t;
1181         int                     i;
1182         m = r_refdef.worldmodel;
1183
1184         Con_Print("Worldmodel textures :\n");
1185         for(i=0,t=m->data_textures;i<m->num_textures;i++,t++)
1186                 if (t->numskinframes)
1187                         Con_Printf("%s\n", t->name);
1188 }
1189
1190 #if 0
1191 static void gl_surf_start(void)
1192 {
1193 }
1194
1195 static void gl_surf_shutdown(void)
1196 {
1197 }
1198
1199 static void gl_surf_newmap(void)
1200 {
1201 }
1202 #endif
1203
1204 void GL_Surf_Init(void)
1205 {
1206
1207         Cvar_RegisterVariable(&r_ambient);
1208         Cvar_RegisterVariable(&r_lockpvs);
1209         Cvar_RegisterVariable(&r_lockvisibility);
1210         Cvar_RegisterVariable(&r_useportalculling);
1211         Cvar_RegisterVariable(&r_q3bsp_renderskydepth);
1212
1213         Cmd_AddCommand ("r_replacemaptexture", R_ReplaceWorldTexture, "override a map texture for testing purposes");
1214         Cmd_AddCommand ("r_listmaptextures", R_ListWorldTextures, "list all textures used by the current map");
1215
1216         //R_RegisterModule("GL_Surf", gl_surf_start, gl_surf_shutdown, gl_surf_newmap);
1217 }
1218