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 // if true, the view is currently in a leaf without pvs data
  44 qboolean r_worldnovis;
  45
  46 /*
  47 ===============
  48 R_BuildLightMap
  49
  50 Combine and scale multiple lightmaps into the 8.8 format in blocklights
  51 ===============
  52 */
  53 void R_BuildLightMap (const entity_render_t *ent, msurface_t *surface)
  54 {
  55         int smax, tmax, i, size, size3, maps, l;
  56         int *bl, scale;
  57         unsigned char *lightmap, *out, *stain;
  58         model_t *model = ent->model;
  59         static int intblocklights[MAX_LIGHTMAP_SIZE*MAX_LIGHTMAP_SIZE*3]; // LordHavoc: *3 for colored lighting
  60         static unsigned char templight[MAX_LIGHTMAP_SIZE*MAX_LIGHTMAP_SIZE*4];
  61
  62         // update cached lighting info
  63         surface->cached_dlight = 0;
  64
  65         smax = (surface->lightmapinfo->extents[0]>>4)+1;
  66         tmax = (surface->lightmapinfo->extents[1]>>4)+1;
  67         size = smax*tmax;
  68         size3 = size*3;
  69         lightmap = surface->lightmapinfo->samples;
  70
  71 // set to full bright if no light data
  72         bl = intblocklights;
  73         if (!model->brushq1.lightdata)
  74         {
  75                 for (i = 0;i < size3;i++)
  76                         bl[i] = 255*256;
  77         }
  78         else
  79         {
  80 // clear to no light
  81                 memset(bl, 0, size3*sizeof(*bl));
  82
  83 // add all the lightmaps
  84                 if (lightmap)
  85                         for (maps = 0;maps < MAXLIGHTMAPS && surface->lightmapinfo->styles[maps] != 255;maps++, lightmap += size3)
  86                                 for (scale = r_refdef.lightstylevalue[surface->lightmapinfo->styles[maps]], i = 0;i < size3;i++)
  87                                         bl[i] += lightmap[i] * scale;
  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 (model->brushq1.lightmaprgba)
  98         {
  99                 for (i = 0;i < size;i++)
 100                 {
 101                         l = (*bl++ * *stain++) >> 16;*out++ = min(l, 255);
 102                         l = (*bl++ * *stain++) >> 16;*out++ = min(l, 255);
 103                         l = (*bl++ * *stain++) >> 16;*out++ = min(l, 255);
 104                         *out++ = 255;
 105                 }
 106         }
 107         else
 108         {
 109                 for (i = 0;i < size;i++)
 110                 {
 111                         l = (*bl++ * *stain++) >> 16;*out++ = min(l, 255);
 112                         l = (*bl++ * *stain++) >> 16;*out++ = min(l, 255);
 113                         l = (*bl++ * *stain++) >> 16;*out++ = min(l, 255);
 114                 }
 115         }
 116
 117         R_UpdateTexture(surface->lightmaptexture, templight, surface->lightmapinfo->lightmaporigin[0], surface->lightmapinfo->lightmaporigin[1], smax, tmax);
 118
 119         // update the surface's deluxemap if it has one
 120         if (surface->deluxemaptexture != r_texture_blanknormalmap)
 121         {
 122                 vec3_t n;
 123                 unsigned char *normalmap = surface->lightmapinfo->nmapsamples;
 124                 lightmap = surface->lightmapinfo->samples;
 125                 // clear to no normalmap
 126                 bl = intblocklights;
 127                 memset(bl, 0, size3*sizeof(*bl));
 128                 // add all the normalmaps
 129                 if (lightmap && normalmap)
 130                 {
 131                         for (maps = 0;maps < MAXLIGHTMAPS && surface->lightmapinfo->styles[maps] != 255;maps++, lightmap += size3, normalmap += size3)
 132                         {
 133                                 for (scale = r_refdef.lightstylevalue[surface->lightmapinfo->styles[maps]], i = 0;i < size;i++)
 134                                 {
 135                                         // add the normalmap with weighting proportional to the style's lightmap intensity
 136                                         l = (int)(VectorLength(lightmap + i*3) * scale);
 137                                         bl[i*3+0] += ((int)normalmap[i*3+0] - 128) * l;
 138                                         bl[i*3+1] += ((int)normalmap[i*3+1] - 128) * l;
 139                                         bl[i*3+2] += ((int)normalmap[i*3+2] - 128) * l;
 140                                 }
 141                         }
 142                 }
 143                 bl = intblocklights;
 144                 out = templight;
 145                 // we simply renormalize the weighted normals to get a valid deluxemap
 146                 if (model->brushq1.lightmaprgba)
 147                 {
 148                         for (i = 0;i < size;i++, bl += 3)
 149                         {
 150                                 VectorCopy(bl, n);
 151                                 VectorNormalize(n);
 152                                 l = (int)(n[0] * 128 + 128);*out++ = bound(0, l, 255);
 153                                 l = (int)(n[1] * 128 + 128);*out++ = bound(0, l, 255);
 154                                 l = (int)(n[2] * 128 + 128);*out++ = bound(0, l, 255);
 155                                 *out++ = 255;
 156                         }
 157                 }
 158                 else
 159                 {
 160                         for (i = 0;i < size;i++, bl += 3)
 161                         {
 162                                 VectorCopy(bl, n);
 163                                 VectorNormalize(n);
 164                                 l = (int)(n[0] * 128 + 128);*out++ = bound(0, l, 255);
 165                                 l = (int)(n[1] * 128 + 128);*out++ = bound(0, l, 255);
 166                                 l = (int)(n[2] * 128 + 128);*out++ = bound(0, l, 255);
 167                         }
 168                 }
 169                 R_UpdateTexture(surface->deluxemaptexture, templight, surface->lightmapinfo->lightmaporigin[0], surface->lightmapinfo->lightmaporigin[1], smax, tmax);
 170         }
 171 }
 172
 173 void R_StainNode (mnode_t *node, model_t *model, const vec3_t origin, float radius, const float fcolor[8])
 174 {
 175         float ndist, a, ratio, maxdist, maxdist2, maxdist3, invradius, sdtable[256], td, dist2;
 176         msurface_t *surface, *endsurface;
 177         int i, s, t, smax, tmax, smax3, impacts, impactt, stained;
 178         unsigned char *bl;
 179         vec3_t impact;
 180
 181         maxdist = radius * radius;
 182         invradius = 1.0f / radius;
 183
 184 loc0:
 185         if (!node->plane)
 186                 return;
 187         ndist = PlaneDiff(origin, node->plane);
 188         if (ndist > radius)
 189         {
 190                 node = node->children[0];
 191                 goto loc0;
 192         }
 193         if (ndist < -radius)
 194         {
 195                 node = node->children[1];
 196                 goto loc0;
 197         }
 198
 199         dist2 = ndist * ndist;
 200         maxdist3 = maxdist - dist2;
 201
 202         if (node->plane->type < 3)
 203         {
 204                 VectorCopy(origin, impact);
 205                 impact[node->plane->type] -= ndist;
 206         }
 207         else
 208         {
 209                 impact[0] = origin[0] - node->plane->normal[0] * ndist;
 210                 impact[1] = origin[1] - node->plane->normal[1] * ndist;
 211                 impact[2] = origin[2] - node->plane->normal[2] * ndist;
 212         }
 213
 214         for (surface = model->data_surfaces + node->firstsurface, endsurface = surface + node->numsurfaces;surface < endsurface;surface++)
 215         {
 216                 if (surface->lightmapinfo->stainsamples)
 217                 {
 218                         smax = (surface->lightmapinfo->extents[0] >> 4) + 1;
 219                         tmax = (surface->lightmapinfo->extents[1] >> 4) + 1;
 220
 221                         impacts = (int)(DotProduct (impact, surface->lightmapinfo->texinfo->vecs[0]) + surface->lightmapinfo->texinfo->vecs[0][3] - surface->lightmapinfo->texturemins[0]);
 222                         impactt = (int)(DotProduct (impact, surface->lightmapinfo->texinfo->vecs[1]) + surface->lightmapinfo->texinfo->vecs[1][3] - surface->lightmapinfo->texturemins[1]);
 223
 224                         s = bound(0, impacts, smax * 16) - impacts;
 225                         t = bound(0, impactt, tmax * 16) - impactt;
 226                         i = (int)(s * s + t * t + dist2);
 227                         if (i > maxdist)
 228                                 continue;
 229
 230                         // reduce calculations
 231                         for (s = 0, i = impacts; s < smax; s++, i -= 16)
 232                                 sdtable[s] = i * i + dist2;
 233
 234                         bl = surface->lightmapinfo->stainsamples;
 235                         smax3 = smax * 3;
 236                         stained = false;
 237
 238                         i = impactt;
 239                         for (t = 0;t < tmax;t++, i -= 16)
 240                         {
 241                                 td = i * i;
 242                                 // make sure some part of it is visible on this line
 243                                 if (td < maxdist3)
 244                                 {
 245                                         maxdist2 = maxdist - td;
 246                                         for (s = 0;s < smax;s++)
 247                                         {
 248                                                 if (sdtable[s] < maxdist2)
 249                                                 {
 250                                                         ratio = lhrandom(0.0f, 1.0f);
 251                                                         a = (fcolor[3] + ratio * fcolor[7]) * (1.0f - sqrt(sdtable[s] + td) * invradius);
 252                                                         if (a >= (1.0f / 64.0f))
 253                                                         {
 254                                                                 if (a > 1)
 255                                                                         a = 1;
 256                                                                 bl[0] = (unsigned char) ((float) bl[0] + a * ((fcolor[0] + ratio * fcolor[4]) - (float) bl[0]));
 257                                                                 bl[1] = (unsigned char) ((float) bl[1] + a * ((fcolor[1] + ratio * fcolor[5]) - (float) bl[1]));
 258                                                                 bl[2] = (unsigned char) ((float) bl[2] + a * ((fcolor[2] + ratio * fcolor[6]) - (float) bl[2]));
 259                                                                 stained = true;
 260                                                         }
 261                                                 }
 262                                                 bl += 3;
 263                                         }
 264                                 }
 265                                 else // skip line
 266                                         bl += smax3;
 267                         }
 268                         // force lightmap upload
 269                         if (stained)
 270                                 surface->cached_dlight = true;
 271                 }
 272         }
 273
 274         if (node->children[0]->plane)
 275         {
 276                 if (node->children[1]->plane)
 277                 {
 278                         R_StainNode(node->children[0], model, origin, radius, fcolor);
 279                         node = node->children[1];
 280                         goto loc0;
 281                 }
 282                 else
 283                 {
 284                         node = node->children[0];
 285                         goto loc0;
 286                 }
 287         }
 288         else if (node->children[1]->plane)
 289         {
 290                 node = node->children[1];
 291                 goto loc0;
 292         }
 293 }
 294
 295 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)
 296 {
 297         int n;
 298         float fcolor[8];
 299         entity_render_t *ent;
 300         model_t *model;
 301         vec3_t org;
 302         if (r_refdef.worldmodel == NULL || !r_refdef.worldmodel->brush.data_nodes || !r_refdef.worldmodel->brushq1.lightdata)
 303                 return;
 304         fcolor[0] = cr1;
 305         fcolor[1] = cg1;
 306         fcolor[2] = cb1;
 307         fcolor[3] = ca1 * (1.0f / 64.0f);
 308         fcolor[4] = cr2 - cr1;
 309         fcolor[5] = cg2 - cg1;
 310         fcolor[6] = cb2 - cb1;
 311         fcolor[7] = (ca2 - ca1) * (1.0f / 64.0f);
 312
 313         R_StainNode(r_refdef.worldmodel->brush.data_nodes + r_refdef.worldmodel->brushq1.hulls[0].firstclipnode, r_refdef.worldmodel, origin, radius, fcolor);
 314
 315         // look for embedded bmodels
 316         for (n = 0;n < cl.num_brushmodel_entities;n++)
 317         {
 318                 ent = &cl.entities[cl.brushmodel_entities[n]].render;
 319                 model = ent->model;
 320                 if (model && model->name[0] == '*')
 321                 {
 322                         if (model->brush.data_nodes)
 323                         {
 324                                 Matrix4x4_Transform(&ent->inversematrix, origin, org);
 325                                 R_StainNode(model->brush.data_nodes + model->brushq1.hulls[0].firstclipnode, model, org, radius, fcolor);
 326                         }
 327                 }
 328         }
 329 }
 330
 331
 332 /*
 333 =============================================================
 334
 335         BRUSH MODELS
 336
 337 =============================================================
 338 */
 339
 340 static void R_DrawPortal_Callback(const entity_render_t *ent, int surfacenumber, const rtlight_t *rtlight)
 341 {
 342         const mportal_t *portal = (mportal_t *)ent;
 343         int i, numpoints;
 344         float *v;
 345         float vertex3f[POLYGONELEMENTS_MAXPOINTS*3];
 346         GL_BlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
 347         GL_DepthMask(false);
 348         GL_DepthTest(true);
 349         qglDisable(GL_CULL_FACE);
 350         R_Mesh_Matrix(&identitymatrix);
 351
 352         numpoints = min(portal->numpoints, POLYGONELEMENTS_MAXPOINTS);
 353
 354         R_Mesh_VertexPointer(vertex3f);
 355         R_Mesh_ColorPointer(NULL);
 356         R_Mesh_ResetTextureState();
 357
 358         i = surfacenumber;
 359         GL_Color(((i & 0x0007) >> 0) * (1.0f / 7.0f),
 360                          ((i & 0x0038) >> 3) * (1.0f / 7.0f),
 361                          ((i & 0x01C0) >> 6) * (1.0f / 7.0f),
 362                          0.125f);
 363         for (i = 0, v = vertex3f;i < numpoints;i++, v += 3)
 364                 VectorCopy(portal->points[i].position, v);
 365         R_Mesh_Draw(0, numpoints, numpoints - 2, polygonelements);
 366         qglEnable(GL_CULL_FACE);
 367 }
 368
 369 // LordHavoc: this is just a nice debugging tool, very slow
 370 static void R_DrawPortals(void)
 371 {
 372         int i, leafnum;
 373         mportal_t *portal;
 374         float center[3], f;
 375         model_t *model = r_refdef.worldmodel;
 376         if (model == NULL)
 377                 return;
 378         for (leafnum = 0;leafnum < r_refdef.worldmodel->brush.num_leafs;leafnum++)
 379         {
 380                 if (r_worldleafvisible[leafnum])
 381                 {
 382                         //for (portalnum = 0, portal = model->brush.data_portals;portalnum < model->brush.num_portals;portalnum++, portal++)
 383                         for (portal = r_refdef.worldmodel->brush.data_leafs[leafnum].portals;portal;portal = portal->next)
 384                         {
 385                                 if (portal->numpoints <= POLYGONELEMENTS_MAXPOINTS)
 386                                 if (!R_CullBox(portal->mins, portal->maxs))
 387                                 {
 388                                         VectorClear(center);
 389                                         for (i = 0;i < portal->numpoints;i++)
 390                                                 VectorAdd(center, portal->points[i].position, center);
 391                                         f = ixtable[portal->numpoints];
 392                                         VectorScale(center, f, center);
 393                                         R_MeshQueue_AddTransparent(center, R_DrawPortal_Callback, (entity_render_t *)portal, leafnum, r_shadow_rtlight);
 394                                 }
 395                         }
 396                 }
 397         }
 398 }
 399
 400 void R_WorldVisibility(void)
 401 {
 402         int i, j, *mark;
 403         mleaf_t *leaf;
 404         mleaf_t *viewleaf;
 405         model_t *model = r_refdef.worldmodel;
 406
 407         if (!model)
 408                 return;
 409
 410         // if possible find the leaf the view origin is in
 411         viewleaf = model->brush.PointInLeaf ? model->brush.PointInLeaf(model, r_vieworigin) : NULL;
 412         // if possible fetch the visible cluster bits
 413         if (!r_lockpvs.integer && model->brush.FatPVS)
 414                 model->brush.FatPVS(model, r_vieworigin, 2, r_pvsbits, sizeof(r_pvsbits));
 415
 416         if (!r_lockvisibility.integer)
 417         {
 418                 // clear the visible surface and leaf flags arrays
 419                 memset(r_worldsurfacevisible, 0, model->num_surfaces);
 420                 memset(r_worldleafvisible, 0, model->brush.num_leafs);
 421
 422                 r_worldnovis = false;
 423
 424                 // if floating around in the void (no pvs data available, and no
 425                 // portals available), simply use all on-screen leafs.
 426                 if (!viewleaf || viewleaf->clusterindex < 0)
 427                 {
 428                         // no visibility method: (used when floating around in the void)
 429                         // simply cull each leaf to the frustum (view pyramid)
 430                         // similar to quake's RecursiveWorldNode but without cache misses
 431                         r_worldnovis = true;
 432                         for (j = 0, leaf = model->brush.data_leafs;j < model->brush.num_leafs;j++, leaf++)
 433                         {
 434                                 // if leaf is in current pvs and on the screen, mark its surfaces
 435                                 if (!R_CullBox(leaf->mins, leaf->maxs))
 436                                 {
 437                                         renderstats.world_leafs++;
 438                                         r_worldleafvisible[j] = true;
 439                                         if (leaf->numleafsurfaces)
 440                                                 for (i = 0, mark = leaf->firstleafsurface;i < leaf->numleafsurfaces;i++, mark++)
 441                                                         r_worldsurfacevisible[*mark] = true;
 442                                 }
 443                         }
 444                 }
 445                 // if the user prefers to disable portal culling (testing?), simply
 446                 // use all on-screen leafs that are in the pvs.
 447                 else if (!r_useportalculling.integer)
 448                 {
 449                         // pvs method:
 450                         // simply check if each leaf is in the Potentially Visible Set,
 451                         // and cull to frustum (view pyramid)
 452                         // similar to quake's RecursiveWorldNode but without cache misses
 453                         for (j = 0, leaf = model->brush.data_leafs;j < model->brush.num_leafs;j++, leaf++)
 454                         {
 455                                 // if leaf is in current pvs and on the screen, mark its surfaces
 456                                 if (CHECKPVSBIT(r_pvsbits, leaf->clusterindex) && !R_CullBox(leaf->mins, leaf->maxs))
 457                                 {
 458                                         renderstats.world_leafs++;
 459                                         r_worldleafvisible[j] = true;
 460                                         if (leaf->numleafsurfaces)
 461                                                 for (i = 0, mark = leaf->firstleafsurface;i < leaf->numleafsurfaces;i++, mark++)
 462                                                         r_worldsurfacevisible[*mark] = true;
 463                                 }
 464                         }
 465                 }
 466                 // otherwise use a recursive portal flow, culling each portal to
 467                 // frustum and checking if the leaf the portal leads to is in the pvs
 468                 else
 469                 {
 470                         int leafstackpos;
 471                         mportal_t *p;
 472                         mleaf_t *leafstack[8192];
 473                         // simple-frustum portal method:
 474                         // follows portals leading outward from viewleaf, does not venture
 475                         // offscreen or into leafs that are not visible, faster than
 476                         // Quake's RecursiveWorldNode and vastly better in unvised maps,
 477                         // often culls some surfaces that pvs alone would miss
 478                         // (such as a room in pvs that is hidden behind a wall, but the
 479                         //  passage leading to the room is off-screen)
 480                         leafstack[0] = viewleaf;
 481                         leafstackpos = 1;
 482                         while (leafstackpos)
 483                         {
 484                                 renderstats.world_leafs++;
 485                                 leaf = leafstack[--leafstackpos];
 486                                 r_worldleafvisible[leaf - model->brush.data_leafs] = true;
 487                                 // mark any surfaces bounding this leaf
 488                                 if (leaf->numleafsurfaces)
 489                                         for (i = 0, mark = leaf->firstleafsurface;i < leaf->numleafsurfaces;i++, mark++)
 490                                                 r_worldsurfacevisible[*mark] = true;
 491                                 // follow portals into other leafs
 492                                 // the checks are:
 493                                 // if viewer is behind portal (portal faces outward into the scene)
 494                                 // and the portal polygon's bounding box is on the screen
 495                                 // and the leaf has not been visited yet
 496                                 // and the leaf is visible in the pvs
 497                                 // (the first two checks won't cause as many cache misses as the leaf checks)
 498                                 for (p = leaf->portals;p;p = p->next)
 499                                 {
 500                                         renderstats.world_portals++;
 501                                         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))
 502                                                 leafstack[leafstackpos++] = p->past;
 503                                 }
 504                         }
 505                 }
 506         }
 507
 508         if (r_drawportals.integer)
 509                 R_DrawPortals();
 510 }
 511
 512 void R_Q1BSP_DrawSky(entity_render_t *ent)
 513 {
 514         if (ent->model == NULL)
 515                 return;
 516         R_DrawSurfaces(ent, true);
 517 }
 518
 519 void R_Q1BSP_Draw(entity_render_t *ent)
 520 {
 521         model_t *model = ent->model;
 522         if (model == NULL)
 523                 return;
 524         R_DrawSurfaces(ent, false);
 525 }
 526
 527 typedef struct r_q1bsp_getlightinfo_s
 528 {
 529         model_t *model;
 530         vec3_t relativelightorigin;
 531         float lightradius;
 532         int *outleaflist;
 533         unsigned char *outleafpvs;
 534         int outnumleafs;
 535         int *outsurfacelist;
 536         unsigned char *outsurfacepvs;
 537         int outnumsurfaces;
 538         vec3_t outmins;
 539         vec3_t outmaxs;
 540         vec3_t lightmins;
 541         vec3_t lightmaxs;
 542         const unsigned char *pvs;
 543 }
 544 r_q1bsp_getlightinfo_t;
 545
 546 void R_Q1BSP_RecursiveGetLightInfo(r_q1bsp_getlightinfo_t *info, mnode_t *node)
 547 {
 548         int sides;
 549         mleaf_t *leaf;
 550         for (;;)
 551         {
 552                 mplane_t *plane = node->plane;
 553                 //if (!BoxesOverlap(info->lightmins, info->lightmaxs, node->mins, node->maxs))
 554                 //      return;
 555                 if (!plane)
 556                         break;
 557                 if (plane->type < 3)
 558                         sides = ((info->lightmaxs[plane->type] >= plane->dist) | ((info->lightmins[plane->type] < plane->dist) << 1));
 559                 else
 560                         sides = BoxOnPlaneSide(info->lightmins, info->lightmaxs, plane);
 561                 if (sides == 3)
 562                 {
 563                         R_Q1BSP_RecursiveGetLightInfo(info, node->children[0]);
 564                         node = node->children[1];
 565                 }
 566                 else if (sides == 0)
 567                         return; // ERROR: NAN bounding box!
 568                 else
 569                         node = node->children[sides - 1];
 570         }
 571         leaf = (mleaf_t *)node;
 572         if (info->pvs == NULL || CHECKPVSBIT(info->pvs, leaf->clusterindex))
 573         {
 574                 info->outmins[0] = min(info->outmins[0], leaf->mins[0]);
 575                 info->outmins[1] = min(info->outmins[1], leaf->mins[1]);
 576                 info->outmins[2] = min(info->outmins[2], leaf->mins[2]);
 577                 info->outmaxs[0] = max(info->outmaxs[0], leaf->maxs[0]);
 578                 info->outmaxs[1] = max(info->outmaxs[1], leaf->maxs[1]);
 579                 info->outmaxs[2] = max(info->outmaxs[2], leaf->maxs[2]);
 580                 if (info->outleafpvs)
 581                 {
 582                         int leafindex = leaf - info->model->brush.data_leafs;
 583                         if (!CHECKPVSBIT(info->outleafpvs, leafindex))
 584                         {
 585                                 SETPVSBIT(info->outleafpvs, leafindex);
 586                                 info->outleaflist[info->outnumleafs++] = leafindex;
 587                         }
 588                 }
 589                 if (info->outsurfacepvs)
 590                 {
 591                         int leafsurfaceindex;
 592                         for (leafsurfaceindex = 0;leafsurfaceindex < leaf->numleafsurfaces;leafsurfaceindex++)
 593                         {
 594                                 int surfaceindex = leaf->firstleafsurface[leafsurfaceindex];
 595                                 if (!CHECKPVSBIT(info->outsurfacepvs, surfaceindex))
 596                                 {
 597                                         msurface_t *surface = info->model->data_surfaces + surfaceindex;
 598                                         if (BoxesOverlap(info->lightmins, info->lightmaxs, surface->mins, surface->maxs))
 599                                         {
 600                                                 int triangleindex, t;
 601                                                 const int *e;
 602                                                 const vec_t *v[3];
 603                                                 for (triangleindex = 0, t = surface->num_firstshadowmeshtriangle, e = info->model->brush.shadowmesh->element3i + t * 3;triangleindex < surface->num_triangles;triangleindex++, t++, e += 3)
 604                                                 {
 605                                                         v[0] = info->model->brush.shadowmesh->vertex3f + e[0] * 3;
 606                                                         v[1] = info->model->brush.shadowmesh->vertex3f + e[1] * 3;
 607                                                         v[2] = info->model->brush.shadowmesh->vertex3f + e[2] * 3;
 608                                                         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])))
 609                                                         {
 610                                                                 SETPVSBIT(info->outsurfacepvs, surfaceindex);
 611                                                                 info->outsurfacelist[info->outnumsurfaces++] = surfaceindex;
 612                                                                 break;
 613                                                         }
 614                                                 }
 615                                         }
 616                                 }
 617                         }
 618                 }
 619         }
 620 }
 621
 622 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)
 623 {
 624         r_q1bsp_getlightinfo_t info;
 625         VectorCopy(relativelightorigin, info.relativelightorigin);
 626         info.lightradius = lightradius;
 627         info.lightmins[0] = info.relativelightorigin[0] - info.lightradius;
 628         info.lightmins[1] = info.relativelightorigin[1] - info.lightradius;
 629         info.lightmins[2] = info.relativelightorigin[2] - info.lightradius;
 630         info.lightmaxs[0] = info.relativelightorigin[0] + info.lightradius;
 631         info.lightmaxs[1] = info.relativelightorigin[1] + info.lightradius;
 632         info.lightmaxs[2] = info.relativelightorigin[2] + info.lightradius;
 633         if (ent->model == NULL)
 634         {
 635                 VectorCopy(info.lightmins, outmins);
 636                 VectorCopy(info.lightmaxs, outmaxs);
 637                 *outnumleafspointer = 0;
 638                 *outnumsurfacespointer = 0;
 639                 return;
 640         }
 641         info.model = ent->model;
 642         info.outleaflist = outleaflist;
 643         info.outleafpvs = outleafpvs;
 644         info.outnumleafs = 0;
 645         info.outsurfacelist = outsurfacelist;
 646         info.outsurfacepvs = outsurfacepvs;
 647         info.outnumsurfaces = 0;
 648         VectorCopy(info.relativelightorigin, info.outmins);
 649         VectorCopy(info.relativelightorigin, info.outmaxs);
 650         memset(outleafpvs, 0, (info.model->brush.num_leafs + 7) >> 3);
 651         memset(outsurfacepvs, 0, (info.model->nummodelsurfaces + 7) >> 3);
 652         if (info.model->brush.GetPVS)
 653                 info.pvs = info.model->brush.GetPVS(info.model, info.relativelightorigin);
 654         else
 655                 info.pvs = NULL;
 656         R_UpdateAllTextureInfo(ent);
 657         if (r_shadow_compilingrtlight)
 658         {
 659                 // use portal recursion for exact light volume culling, and exact surface checking
 660                 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);
 661         }
 662         else if (r_shadow_realtime_dlight_portalculling.integer)
 663         {
 664                 // use portal recursion for exact light volume culling, but not the expensive exact surface checking
 665                 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);
 666         }
 667         else
 668         {
 669                 // use BSP recursion as lights are often small
 670                 R_Q1BSP_RecursiveGetLightInfo(&info, info.model->brush.data_nodes);
 671         }
 672
 673         // limit combined leaf box to light boundaries
 674         outmins[0] = max(info.outmins[0] - 1, info.lightmins[0]);
 675         outmins[1] = max(info.outmins[1] - 1, info.lightmins[1]);
 676         outmins[2] = max(info.outmins[2] - 1, info.lightmins[2]);
 677         outmaxs[0] = min(info.outmaxs[0] + 1, info.lightmaxs[0]);
 678         outmaxs[1] = min(info.outmaxs[1] + 1, info.lightmaxs[1]);
 679         outmaxs[2] = min(info.outmaxs[2] + 1, info.lightmaxs[2]);
 680
 681         *outnumleafspointer = info.outnumleafs;
 682         *outnumsurfacespointer = info.outnumsurfaces;
 683 }
 684
 685 void R_Q1BSP_CompileShadowVolume(entity_render_t *ent, vec3_t relativelightorigin, float lightradius, int numsurfaces, const int *surfacelist)
 686 {
 687         model_t *model = ent->model;
 688         msurface_t *surface;
 689         int surfacelistindex;
 690         float projectdistance = lightradius + model->radius*2 + r_shadow_projectdistance.value;
 691         texture_t *texture;
 692         r_shadow_compilingrtlight->static_meshchain_shadow = Mod_ShadowMesh_Begin(r_main_mempool, 32768, 32768, NULL, NULL, NULL, false, false, true);
 693         R_Shadow_PrepareShadowMark(model->brush.shadowmesh->numtriangles);
 694         for (surfacelistindex = 0;surfacelistindex < numsurfaces;surfacelistindex++)
 695         {
 696                 surface = model->data_surfaces + surfacelist[surfacelistindex];
 697                 texture = surface->texture;
 698                 if ((texture->basematerialflags & (MATERIALFLAG_NODRAW | MATERIALFLAG_TRANSPARENT | MATERIALFLAG_WALL)) != MATERIALFLAG_WALL)
 699                         continue;
 700                 if ((texture->textureflags & (Q3TEXTUREFLAG_TWOSIDED | Q3TEXTUREFLAG_AUTOSPRITE | Q3TEXTUREFLAG_AUTOSPRITE2)) || (ent->flags & RENDER_NOCULLFACE))
 701                         continue;
 702                 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);
 703         }
 704         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);
 705         r_shadow_compilingrtlight->static_meshchain_shadow = Mod_ShadowMesh_Finish(r_main_mempool, r_shadow_compilingrtlight->static_meshchain_shadow, false, false);
 706 }
 707
 708 void R_Q1BSP_DrawShadowVolume_Batch(entity_render_t *ent, texture_t *texture, const vec3_t modelorg, const vec3_t relativelightorigin, const vec3_t lightmins, const vec3_t lightmaxs, int texturenumsurfaces, msurface_t **texturesurfacelist)
 709 {
 710         int texturesurfaceindex;
 711         RSurf_PrepareVerticesForBatch(ent, texture, modelorg, false, false, texturenumsurfaces, texturesurfacelist);
 712         for (texturesurfaceindex = 0;texturesurfaceindex < texturenumsurfaces;texturesurfaceindex++)
 713         {
 714                 msurface_t *surface = texturesurfacelist[texturesurfaceindex];
 715                 R_Shadow_MarkVolumeFromBox(surface->num_firsttriangle, surface->num_triangles, rsurface_vertex3f, rsurface_model->surfmesh.data_element3i, relativelightorigin, lightmins, lightmaxs, surface->mins, surface->maxs);
 716         }
 717 }
 718
 719 void R_Q1BSP_DrawShadowVolume(entity_render_t *ent, vec3_t relativelightorigin, float lightradius, int modelnumsurfaces, const int *modelsurfacelist, const vec3_t lightmins, const vec3_t lightmaxs)
 720 {
 721         model_t *model = ent->model;
 722         msurface_t *surface;
 723         int modelsurfacelistindex;
 724         int f = 0;
 725         float projectdistance = lightradius + model->radius*2 + r_shadow_projectdistance.value;
 726         vec3_t modelorg;
 727         texture_t *t = NULL, *texture;
 728         const int maxsurfacelist = 1024;
 729         int numsurfacelist = 0;
 730         msurface_t *surfacelist[1024];
 731         // check the box in modelspace, it was already checked in worldspace
 732         if (!BoxesOverlap(model->normalmins, model->normalmaxs, lightmins, lightmaxs))
 733                 return;
 734         R_UpdateAllTextureInfo(ent);
 735         if (model->brush.shadowmesh)
 736         {
 737                 R_Shadow_PrepareShadowMark(model->brush.shadowmesh->numtriangles);
 738                 for (modelsurfacelistindex = 0;modelsurfacelistindex < modelnumsurfaces;modelsurfacelistindex++)
 739                 {
 740                         surface = model->data_surfaces + modelsurfacelist[modelsurfacelistindex];
 741                         texture = surface->texture->currentframe;
 742                         if ((texture->currentmaterialflags & (MATERIALFLAG_NODRAW | MATERIALFLAG_TRANSPARENT | MATERIALFLAG_WALL)) != MATERIALFLAG_WALL)
 743                                 continue;
 744                         if ((texture->textureflags & (Q3TEXTUREFLAG_TWOSIDED | Q3TEXTUREFLAG_AUTOSPRITE | Q3TEXTUREFLAG_AUTOSPRITE2)) || (ent->flags & RENDER_NOCULLFACE))
 745                                 continue;
 746                         R_Shadow_MarkVolumeFromBox(surface->num_firstshadowmeshtriangle, surface->num_triangles, model->brush.shadowmesh->vertex3f, model->brush.shadowmesh->element3i, relativelightorigin, lightmins, lightmaxs, surface->mins, surface->maxs);
 747                 }
 748                 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);
 749         }
 750         else
 751         {
 752                 projectdistance = lightradius + model->radius*2;
 753                 Matrix4x4_Transform(&ent->inversematrix, r_vieworigin, modelorg);
 754                 R_Shadow_PrepareShadowMark(model->surfmesh.num_triangles);
 755                 // identify lit faces within the bounding box
 756                 for (modelsurfacelistindex = 0;modelsurfacelistindex < modelnumsurfaces;modelsurfacelistindex++)
 757                 {
 758                         surface = model->data_surfaces + modelsurfacelist[modelsurfacelistindex];
 759                         if (t != surface->texture || numsurfacelist >= maxsurfacelist)
 760                         {
 761                                 if (numsurfacelist)
 762                                 {
 763                                         R_Q1BSP_DrawShadowVolume_Batch(ent, texture, modelorg, relativelightorigin, lightmins, lightmaxs, numsurfacelist, surfacelist);
 764                                         numsurfacelist = 0;
 765                                 }
 766                                 t = surface->texture;
 767                                 texture = t->currentframe;
 768                                 f = (texture->currentmaterialflags & (MATERIALFLAG_NODRAW | MATERIALFLAG_TRANSPARENT | MATERIALFLAG_WALL)) == MATERIALFLAG_WALL;
 769                         }
 770                         if (f && surface->num_triangles)
 771                                 surfacelist[numsurfacelist++] = surface;
 772                 }
 773                 if (numsurfacelist)
 774                         R_Q1BSP_DrawShadowVolume_Batch(ent, texture, modelorg, relativelightorigin, lightmins, lightmaxs, numsurfacelist, surfacelist);
 775                 R_Shadow_VolumeFromList(model->surfmesh.num_vertices, model->surfmesh.num_triangles, rsurface_vertex3f, model->surfmesh.data_element3i, model->surfmesh.data_neighbor3i, relativelightorigin, projectdistance, numshadowmark, shadowmarklist);
 776         }
 777 }
 778
 779 static void R_Q1BSP_DrawLight_TransparentCallback(const entity_render_t *ent, int surfacenumber, const rtlight_t *rtlight)
 780 {
 781         msurface_t *surface = ent->model->data_surfaces + surfacenumber;
 782         texture_t *texture = surface->texture;
 783         R_UpdateTextureInfo(ent, texture);
 784         texture = texture->currentframe;
 785         R_Shadow_RenderMode_Begin();
 786         R_Shadow_RenderMode_ActiveLight((rtlight_t *)rtlight);
 787         R_Shadow_RenderMode_Lighting(false, true);
 788         R_Shadow_SetupEntityLight(ent);
 789         R_Shadow_RenderSurfacesLighting(ent, texture, 1, &surface);
 790         R_Shadow_RenderMode_End();
 791 }
 792
 793 static void R_Q1BSP_DrawLight_TransparentBatch(const entity_render_t *ent, texture_t *texture, int batchnumsurfaces, msurface_t **batchsurfacelist)
 794 {
 795         int batchsurfaceindex;
 796         model_t *model = ent->model;
 797         msurface_t *batchsurface;
 798         vec3_t tempcenter, center;
 799         for (batchsurfaceindex = 0;batchsurfaceindex < batchnumsurfaces;batchsurfaceindex++)
 800         {
 801                 batchsurface = batchsurfacelist[batchsurfaceindex];
 802                 tempcenter[0] = (batchsurface->mins[0] + batchsurface->maxs[0]) * 0.5f;
 803                 tempcenter[1] = (batchsurface->mins[1] + batchsurface->maxs[1]) * 0.5f;
 804                 tempcenter[2] = (batchsurface->mins[2] + batchsurface->maxs[2]) * 0.5f;
 805                 Matrix4x4_Transform(&ent->matrix, tempcenter, center);
 806                 R_MeshQueue_AddTransparent(texture->currentmaterialflags & MATERIALFLAG_NODEPTHTEST ? r_vieworigin : center, R_Q1BSP_DrawLight_TransparentCallback, ent, batchsurface - model->data_surfaces, r_shadow_rtlight);
 807         }
 808 }
 809
 810 #define RSURF_MAX_BATCHSURFACES 1024
 811
 812 void R_Q1BSP_DrawLight(entity_render_t *ent, int numsurfaces, const int *surfacelist)
 813 {
 814         model_t *model = ent->model;
 815         msurface_t *surface;
 816         texture_t *texture;
 817         int surfacelistindex, batchnumsurfaces;
 818         msurface_t *batchsurfacelist[RSURF_MAX_BATCHSURFACES];
 819         vec3_t modelorg;
 820         texture_t *tex;
 821         qboolean skip;
 822         R_UpdateAllTextureInfo(ent);
 823         Matrix4x4_Transform(&ent->inversematrix, r_vieworigin, modelorg);
 824         tex = NULL;
 825         texture = NULL;
 826         skip = false;
 827         batchnumsurfaces = 0;
 828         for (surfacelistindex = 0;surfacelistindex < numsurfaces;surfacelistindex++)
 829         {
 830                 if ((ent == r_refdef.worldentity && !r_worldsurfacevisible[surfacelist[surfacelistindex]]))
 831                         continue;
 832                 surface = model->data_surfaces + surfacelist[surfacelistindex];
 833                 renderstats.lights_lighttriangles += surface->num_triangles;
 834                 if (tex != surface->texture)
 835                 {
 836                         if (batchnumsurfaces > 0)
 837                         {
 838                                 if (texture->currentmaterialflags & MATERIALFLAG_TRANSPARENT)
 839                                         R_Q1BSP_DrawLight_TransparentBatch(ent, texture, batchnumsurfaces, batchsurfacelist);
 840                                 else
 841                                         R_Shadow_RenderSurfacesLighting(ent, texture, batchnumsurfaces, batchsurfacelist);
 842                                 batchnumsurfaces = 0;
 843                         }
 844                         tex = surface->texture;
 845                         texture = surface->texture->currentframe;
 846                         skip = (texture->currentmaterialflags & MATERIALFLAG_SKY) != 0;
 847                         if (skip)
 848                                 continue;
 849                 }
 850                 if (!skip && surface->num_triangles)
 851                 {
 852                         if (batchnumsurfaces == RSURF_MAX_BATCHSURFACES)
 853                         {
 854                                 if (texture->currentmaterialflags & MATERIALFLAG_TRANSPARENT)
 855                                         R_Q1BSP_DrawLight_TransparentBatch(ent, texture, batchnumsurfaces, batchsurfacelist);
 856                                 else
 857                                         R_Shadow_RenderSurfacesLighting(ent, texture, batchnumsurfaces, batchsurfacelist);
 858                                 batchnumsurfaces = 0;
 859                         }
 860                         batchsurfacelist[batchnumsurfaces++] = surface;
 861                 }
 862         }
 863         if (batchnumsurfaces > 0)
 864         {
 865                 if (texture->currentmaterialflags & MATERIALFLAG_TRANSPARENT)
 866                         R_Q1BSP_DrawLight_TransparentBatch(ent, texture, batchnumsurfaces, batchsurfacelist);
 867                 else
 868                         R_Shadow_RenderSurfacesLighting(ent, texture, batchnumsurfaces, batchsurfacelist);
 869                 batchnumsurfaces = 0;
 870         }
 871         qglEnable(GL_CULL_FACE);
 872 }
 873
 874 //Made by [515]
 875 void R_ReplaceWorldTexture (void)
 876 {
 877         model_t         *m;
 878         texture_t       *t;
 879         int                     i;
 880         const char      *r, *newt;
 881         m = r_refdef.worldmodel;
 882
 883         if(Cmd_Argc() < 2)
 884         {
 885                 Con_Print("r_replacemaptexture <texname> <newtexname> - replaces texture\n");
 886                 Con_Print("r_replacemaptexture <texname> - switch back to default texture\n");
 887                 return;
 888         }
 889         if(!cl.islocalgame || !cl.worldmodel)
 890         {
 891                 Con_Print("This command works only in singleplayer\n");
 892                 return;
 893         }
 894         r = Cmd_Argv(1);
 895         newt = Cmd_Argv(2);
 896         if(!newt[0])
 897                 newt = r;
 898         for(i=0,t=m->data_textures;i<m->num_textures;i++,t++)
 899         {
 900                 if(t->width && !strcasecmp(t->name, r))
 901                 {
 902                         if(Mod_LoadSkinFrame(&t->skin, (char*)newt, TEXF_MIPMAP | TEXF_ALPHA | TEXF_PRECACHE | TEXF_PICMIP, false, r_fullbrights.integer))
 903                         {
 904                                 Con_Printf("%s replaced with %s\n", r, newt);
 905                                 return;
 906                         }
 907                         else
 908                         {
 909                                 Con_Printf("%s was not found\n", newt);
 910                                 Mod_LoadSkinFrame(&t->skin, (char*)r, TEXF_MIPMAP | TEXF_ALPHA | TEXF_PRECACHE | TEXF_PICMIP, false, r_fullbrights.integer);//back to default
 911                                 return;
 912                         }
 913                 }
 914         }
 915 }
 916
 917 //Made by [515]
 918 void R_ListWorldTextures (void)
 919 {
 920         model_t         *m;
 921         texture_t       *t;
 922         int                     i;
 923         m = r_refdef.worldmodel;
 924
 925         Con_Print("Worldmodel textures :\n");
 926         for(i=0,t=m->data_textures;i<m->num_textures;i++,t++)
 927                 if(t->skin.base != r_texture_notexture)
 928                         Con_Printf("%s\n", t->name);
 929 }
 930
 931 #if 0
 932 static void gl_surf_start(void)
 933 {
 934 }
 935
 936 static void gl_surf_shutdown(void)
 937 {
 938 }
 939
 940 static void gl_surf_newmap(void)
 941 {
 942 }
 943 #endif
 944
 945 void GL_Surf_Init(void)
 946 {
 947
 948         Cvar_RegisterVariable(&r_ambient);
 949         Cvar_RegisterVariable(&r_drawportals);
 950         Cvar_RegisterVariable(&r_lockpvs);
 951         Cvar_RegisterVariable(&r_lockvisibility);
 952         Cvar_RegisterVariable(&r_useportalculling);
 953         Cvar_RegisterVariable(&r_q3bsp_renderskydepth);
 954
 955         Cmd_AddCommand ("r_replacemaptexture", R_ReplaceWorldTexture, "override a map texture for testing purposes");   // By [515]
 956         Cmd_AddCommand ("r_listmaptextures", R_ListWorldTextures, "list all textures used by the current map"); // By [515]
 957
 958         //R_RegisterModule("GL_Surf", gl_surf_start, gl_surf_shutdown, gl_surf_newmap);
 959 }
 960