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_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         static int intblocklights[MAX_LIGHTMAP_SIZE*MAX_LIGHTMAP_SIZE*3]; // LordHavoc: *3 for colored lighting
  48         static unsigned char templight[MAX_LIGHTMAP_SIZE*MAX_LIGHTMAP_SIZE*4];
  49
  50         // update cached lighting info
  51         surface->cached_dlight = 0;
  52
  53         smax = (surface->lightmapinfo->extents[0]>>4)+1;
  54         tmax = (surface->lightmapinfo->extents[1]>>4)+1;
  55         size = smax*tmax;
  56         size3 = size*3;
  57         lightmap = surface->lightmapinfo->samples;
  58
  59 // set to full bright if no light data
  60         bl = intblocklights;
  61         if (!model->brushq1.lightdata)
  62         {
  63                 for (i = 0;i < size3;i++)
  64                         bl[i] = 255*256;
  65         }
  66         else
  67         {
  68 // clear to no light
  69                 memset(bl, 0, size3*sizeof(*bl));
  70
  71 // add all the lightmaps
  72                 if (lightmap)
  73                         for (maps = 0;maps < MAXLIGHTMAPS && surface->lightmapinfo->styles[maps] != 255;maps++, lightmap += size3)
  74                                 for (scale = r_refdef.lightstylevalue[surface->lightmapinfo->styles[maps]], i = 0;i < size3;i++)
  75                                         bl[i] += lightmap[i] * scale;
  76         }
  77
  78         stain = surface->lightmapinfo->stainsamples;
  79         bl = intblocklights;
  80         out = templight;
  81         // the >> 16 shift adjusts down 8 bits to account for the stainmap
  82         // scaling, and remaps the 0-65536 (2x overbright) to 0-256, it will
  83         // be doubled during rendering to achieve 2x overbright
  84         // (0 = 0.0, 128 = 1.0, 256 = 2.0)
  85         if (model->brushq1.lightmaprgba)
  86         {
  87                 for (i = 0;i < size;i++)
  88                 {
  89                         l = (*bl++ * *stain++) >> 16;*out++ = min(l, 255);
  90                         l = (*bl++ * *stain++) >> 16;*out++ = min(l, 255);
  91                         l = (*bl++ * *stain++) >> 16;*out++ = min(l, 255);
  92                         *out++ = 255;
  93                 }
  94         }
  95         else
  96         {
  97                 for (i = 0;i < size;i++)
  98                 {
  99                         l = (*bl++ * *stain++) >> 16;*out++ = min(l, 255);
 100                         l = (*bl++ * *stain++) >> 16;*out++ = min(l, 255);
 101                         l = (*bl++ * *stain++) >> 16;*out++ = min(l, 255);
 102                 }
 103         }
 104
 105         R_UpdateTexture(surface->lightmaptexture, templight, surface->lightmapinfo->lightmaporigin[0], surface->lightmapinfo->lightmaporigin[1], smax, tmax);
 106
 107         // update the surface's deluxemap if it has one
 108         if (surface->deluxemaptexture != r_texture_blanknormalmap)
 109         {
 110                 vec3_t n;
 111                 unsigned char *normalmap = surface->lightmapinfo->nmapsamples;
 112                 lightmap = surface->lightmapinfo->samples;
 113                 // clear to no normalmap
 114                 bl = intblocklights;
 115                 memset(bl, 0, size3*sizeof(*bl));
 116                 // add all the normalmaps
 117                 if (lightmap && normalmap)
 118                 {
 119                         for (maps = 0;maps < MAXLIGHTMAPS && surface->lightmapinfo->styles[maps] != 255;maps++, lightmap += size3, normalmap += size3)
 120                         {
 121                                 for (scale = r_refdef.lightstylevalue[surface->lightmapinfo->styles[maps]], i = 0;i < size;i++)
 122                                 {
 123                                         // add the normalmap with weighting proportional to the style's lightmap intensity
 124                                         l = (int)(VectorLength(lightmap + i*3) * scale);
 125                                         bl[i*3+0] += ((int)normalmap[i*3+0] - 128) * l;
 126                                         bl[i*3+1] += ((int)normalmap[i*3+1] - 128) * l;
 127                                         bl[i*3+2] += ((int)normalmap[i*3+2] - 128) * l;
 128                                 }
 129                         }
 130                 }
 131                 bl = intblocklights;
 132                 out = templight;
 133                 // we simply renormalize the weighted normals to get a valid deluxemap
 134                 if (model->brushq1.lightmaprgba)
 135                 {
 136                         for (i = 0;i < size;i++, bl += 3)
 137                         {
 138                                 VectorCopy(bl, n);
 139                                 VectorNormalize(n);
 140                                 l = (int)(n[0] * 128 + 128);*out++ = bound(0, l, 255);
 141                                 l = (int)(n[1] * 128 + 128);*out++ = bound(0, l, 255);
 142                                 l = (int)(n[2] * 128 + 128);*out++ = bound(0, l, 255);
 143                                 *out++ = 255;
 144                         }
 145                 }
 146                 else
 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                         }
 156                 }
 157                 R_UpdateTexture(surface->deluxemaptexture, templight, surface->lightmapinfo->lightmaporigin[0], surface->lightmapinfo->lightmaporigin[1], smax, tmax);
 158         }
 159 }
 160
 161 void R_StainNode (mnode_t *node, model_t *model, const vec3_t origin, float radius, const float fcolor[8])
 162 {
 163         float ndist, a, ratio, maxdist, maxdist2, maxdist3, invradius, sdtable[256], td, dist2;
 164         msurface_t *surface, *endsurface;
 165         int i, s, t, smax, tmax, smax3, impacts, impactt, stained;
 166         unsigned char *bl;
 167         vec3_t impact;
 168
 169         maxdist = radius * radius;
 170         invradius = 1.0f / radius;
 171
 172 loc0:
 173         if (!node->plane)
 174                 return;
 175         ndist = PlaneDiff(origin, node->plane);
 176         if (ndist > radius)
 177         {
 178                 node = node->children[0];
 179                 goto loc0;
 180         }
 181         if (ndist < -radius)
 182         {
 183                 node = node->children[1];
 184                 goto loc0;
 185         }
 186
 187         dist2 = ndist * ndist;
 188         maxdist3 = maxdist - dist2;
 189
 190         if (node->plane->type < 3)
 191         {
 192                 VectorCopy(origin, impact);
 193                 impact[node->plane->type] -= ndist;
 194         }
 195         else
 196         {
 197                 impact[0] = origin[0] - node->plane->normal[0] * ndist;
 198                 impact[1] = origin[1] - node->plane->normal[1] * ndist;
 199                 impact[2] = origin[2] - node->plane->normal[2] * ndist;
 200         }
 201
 202         for (surface = model->data_surfaces + node->firstsurface, endsurface = surface + node->numsurfaces;surface < endsurface;surface++)
 203         {
 204                 if (surface->lightmapinfo->stainsamples)
 205                 {
 206                         smax = (surface->lightmapinfo->extents[0] >> 4) + 1;
 207                         tmax = (surface->lightmapinfo->extents[1] >> 4) + 1;
 208
 209                         impacts = (int)(DotProduct (impact, surface->lightmapinfo->texinfo->vecs[0]) + surface->lightmapinfo->texinfo->vecs[0][3] - surface->lightmapinfo->texturemins[0]);
 210                         impactt = (int)(DotProduct (impact, surface->lightmapinfo->texinfo->vecs[1]) + surface->lightmapinfo->texinfo->vecs[1][3] - surface->lightmapinfo->texturemins[1]);
 211
 212                         s = bound(0, impacts, smax * 16) - impacts;
 213                         t = bound(0, impactt, tmax * 16) - impactt;
 214                         i = (int)(s * s + t * t + dist2);
 215                         if (i > maxdist)
 216                                 continue;
 217
 218                         // reduce calculations
 219                         for (s = 0, i = impacts; s < smax; s++, i -= 16)
 220                                 sdtable[s] = i * i + dist2;
 221
 222                         bl = surface->lightmapinfo->stainsamples;
 223                         smax3 = smax * 3;
 224                         stained = false;
 225
 226                         i = impactt;
 227                         for (t = 0;t < tmax;t++, i -= 16)
 228                         {
 229                                 td = i * i;
 230                                 // make sure some part of it is visible on this line
 231                                 if (td < maxdist3)
 232                                 {
 233                                         maxdist2 = maxdist - td;
 234                                         for (s = 0;s < smax;s++)
 235                                         {
 236                                                 if (sdtable[s] < maxdist2)
 237                                                 {
 238                                                         ratio = lhrandom(0.0f, 1.0f);
 239                                                         a = (fcolor[3] + ratio * fcolor[7]) * (1.0f - sqrt(sdtable[s] + td) * invradius);
 240                                                         if (a >= (1.0f / 64.0f))
 241                                                         {
 242                                                                 if (a > 1)
 243                                                                         a = 1;
 244                                                                 bl[0] = (unsigned char) ((float) bl[0] + a * ((fcolor[0] + ratio * fcolor[4]) - (float) bl[0]));
 245                                                                 bl[1] = (unsigned char) ((float) bl[1] + a * ((fcolor[1] + ratio * fcolor[5]) - (float) bl[1]));
 246                                                                 bl[2] = (unsigned char) ((float) bl[2] + a * ((fcolor[2] + ratio * fcolor[6]) - (float) bl[2]));
 247                                                                 stained = true;
 248                                                         }
 249                                                 }
 250                                                 bl += 3;
 251                                         }
 252                                 }
 253                                 else // skip line
 254                                         bl += smax3;
 255                         }
 256                         // force lightmap upload
 257                         if (stained)
 258                                 surface->cached_dlight = true;
 259                 }
 260         }
 261
 262         if (node->children[0]->plane)
 263         {
 264                 if (node->children[1]->plane)
 265                 {
 266                         R_StainNode(node->children[0], model, origin, radius, fcolor);
 267                         node = node->children[1];
 268                         goto loc0;
 269                 }
 270                 else
 271                 {
 272                         node = node->children[0];
 273                         goto loc0;
 274                 }
 275         }
 276         else if (node->children[1]->plane)
 277         {
 278                 node = node->children[1];
 279                 goto loc0;
 280         }
 281 }
 282
 283 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)
 284 {
 285         int n;
 286         float fcolor[8];
 287         entity_render_t *ent;
 288         model_t *model;
 289         vec3_t org;
 290         if (r_refdef.worldmodel == NULL || !r_refdef.worldmodel->brush.data_nodes || !r_refdef.worldmodel->brushq1.lightdata)
 291                 return;
 292         fcolor[0] = cr1;
 293         fcolor[1] = cg1;
 294         fcolor[2] = cb1;
 295         fcolor[3] = ca1 * (1.0f / 64.0f);
 296         fcolor[4] = cr2 - cr1;
 297         fcolor[5] = cg2 - cg1;
 298         fcolor[6] = cb2 - cb1;
 299         fcolor[7] = (ca2 - ca1) * (1.0f / 64.0f);
 300
 301         R_StainNode(r_refdef.worldmodel->brush.data_nodes + r_refdef.worldmodel->brushq1.hulls[0].firstclipnode, r_refdef.worldmodel, origin, radius, fcolor);
 302
 303         // look for embedded bmodels
 304         for (n = 0;n < cl.num_brushmodel_entities;n++)
 305         {
 306                 ent = &cl.entities[cl.brushmodel_entities[n]].render;
 307                 model = ent->model;
 308                 if (model && model->name[0] == '*')
 309                 {
 310                         if (model->brush.data_nodes)
 311                         {
 312                                 Matrix4x4_Transform(&ent->inversematrix, origin, org);
 313                                 R_StainNode(model->brush.data_nodes + model->brushq1.hulls[0].firstclipnode, model, org, radius, fcolor);
 314                         }
 315                 }
 316         }
 317 }
 318
 319
 320 /*
 321 =============================================================
 322
 323         BRUSH MODELS
 324
 325 =============================================================
 326 */
 327
 328 static void R_DrawPortal_Callback(const entity_render_t *ent, const rtlight_t *rtlight, int numsurfaces, int *surfacelist)
 329 {
 330         // due to the hacky nature of this function's parameters, this is never
 331         // called with a batch, so numsurfaces is always 1, and the surfacelist
 332         // contains only a leaf number for coloring purposes
 333         const mportal_t *portal = (mportal_t *)ent;
 334         int i, numpoints;
 335         float *v;
 336         float vertex3f[POLYGONELEMENTS_MAXPOINTS*3];
 337         CHECKGLERROR
 338         GL_BlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
 339         GL_DepthMask(false);
 340         GL_DepthTest(true);
 341         GL_CullFace(GL_NONE);
 342         R_Mesh_Matrix(&identitymatrix);
 343
 344         numpoints = min(portal->numpoints, POLYGONELEMENTS_MAXPOINTS);
 345
 346         R_Mesh_VertexPointer(vertex3f);
 347         R_Mesh_ColorPointer(NULL);
 348         R_Mesh_ResetTextureState();
 349
 350         i = surfacelist[0];
 351         GL_Color(((i & 0x0007) >> 0) * (1.0f / 7.0f) * r_view.colorscale,
 352                          ((i & 0x0038) >> 3) * (1.0f / 7.0f) * r_view.colorscale,
 353                          ((i & 0x01C0) >> 6) * (1.0f / 7.0f) * r_view.colorscale,
 354                          0.125f);
 355         for (i = 0, v = vertex3f;i < numpoints;i++, v += 3)
 356                 VectorCopy(portal->points[i].position, v);
 357         R_Mesh_Draw(0, numpoints, numpoints - 2, polygonelements);
 358 }
 359
 360 // LordHavoc: this is just a nice debugging tool, very slow
 361 void R_DrawPortals(void)
 362 {
 363         int i, leafnum;
 364         mportal_t *portal;
 365         float center[3], f;
 366         model_t *model = r_refdef.worldmodel;
 367         if (model == NULL)
 368                 return;
 369         for (leafnum = 0;leafnum < r_refdef.worldmodel->brush.num_leafs;leafnum++)
 370         {
 371                 if (r_viewcache.world_leafvisible[leafnum])
 372                 {
 373                         //for (portalnum = 0, portal = model->brush.data_portals;portalnum < model->brush.num_portals;portalnum++, portal++)
 374                         for (portal = r_refdef.worldmodel->brush.data_leafs[leafnum].portals;portal;portal = portal->next)
 375                         {
 376                                 if (portal->numpoints <= POLYGONELEMENTS_MAXPOINTS)
 377                                 if (!R_CullBox(portal->mins, portal->maxs))
 378                                 {
 379                                         VectorClear(center);
 380                                         for (i = 0;i < portal->numpoints;i++)
 381                                                 VectorAdd(center, portal->points[i].position, center);
 382                                         f = ixtable[portal->numpoints];
 383                                         VectorScale(center, f, center);
 384                                         R_MeshQueue_AddTransparent(center, R_DrawPortal_Callback, (entity_render_t *)portal, leafnum, r_shadow_rtlight);
 385                                 }
 386                         }
 387                 }
 388         }
 389 }
 390
 391 void R_View_WorldVisibility(void)
 392 {
 393         int i, j, *mark;
 394         mleaf_t *leaf;
 395         mleaf_t *viewleaf;
 396         model_t *model = r_refdef.worldmodel;
 397
 398         if (!model)
 399                 return;
 400
 401         // if possible find the leaf the view origin is in
 402         viewleaf = model->brush.PointInLeaf ? model->brush.PointInLeaf(model, r_view.origin) : NULL;
 403         // if possible fetch the visible cluster bits
 404         if (!r_lockpvs.integer && model->brush.FatPVS)
 405                 model->brush.FatPVS(model, r_view.origin, 2, r_viewcache.world_pvsbits, sizeof(r_viewcache.world_pvsbits));
 406
 407         if (!r_lockvisibility.integer)
 408         {
 409                 // clear the visible surface and leaf flags arrays
 410                 memset(r_viewcache.world_surfacevisible, 0, model->num_surfaces);
 411                 memset(r_viewcache.world_leafvisible, 0, model->brush.num_leafs);
 412
 413                 r_viewcache.world_novis = false;
 414
 415                 // if floating around in the void (no pvs data available, and no
 416                 // portals available), simply use all on-screen leafs.
 417                 if (!viewleaf || viewleaf->clusterindex < 0)
 418                 {
 419                         // no visibility method: (used when floating around in the void)
 420                         // simply cull each leaf to the frustum (view pyramid)
 421                         // similar to quake's RecursiveWorldNode but without cache misses
 422                         r_viewcache.world_novis = true;
 423                         for (j = 0, leaf = model->brush.data_leafs;j < model->brush.num_leafs;j++, leaf++)
 424                         {
 425                                 // if leaf is in current pvs and on the screen, mark its surfaces
 426                                 if (!R_CullBox(leaf->mins, leaf->maxs))
 427                                 {
 428                                         r_refdef.stats.world_leafs++;
 429                                         r_viewcache.world_leafvisible[j] = true;
 430                                         if (leaf->numleafsurfaces)
 431                                                 for (i = 0, mark = leaf->firstleafsurface;i < leaf->numleafsurfaces;i++, mark++)
 432                                                         r_viewcache.world_surfacevisible[*mark] = true;
 433                                 }
 434                         }
 435                 }
 436                 // if the user prefers to disable portal culling (testing?), simply
 437                 // use all on-screen leafs that are in the pvs.
 438                 else if (!r_useportalculling.integer)
 439                 {
 440                         // pvs method:
 441                         // simply check if each leaf is in the Potentially Visible Set,
 442                         // and cull to frustum (view pyramid)
 443                         // similar to quake's RecursiveWorldNode but without cache misses
 444                         for (j = 0, leaf = model->brush.data_leafs;j < model->brush.num_leafs;j++, leaf++)
 445                         {
 446                                 // if leaf is in current pvs and on the screen, mark its surfaces
 447                                 if (CHECKPVSBIT(r_viewcache.world_pvsbits, leaf->clusterindex) && !R_CullBox(leaf->mins, leaf->maxs))
 448                                 {
 449                                         r_refdef.stats.world_leafs++;
 450                                         r_viewcache.world_leafvisible[j] = true;
 451                                         if (leaf->numleafsurfaces)
 452                                                 for (i = 0, mark = leaf->firstleafsurface;i < leaf->numleafsurfaces;i++, mark++)
 453                                                         r_viewcache.world_surfacevisible[*mark] = true;
 454                                 }
 455                         }
 456                 }
 457                 // otherwise use a recursive portal flow, culling each portal to
 458                 // frustum and checking if the leaf the portal leads to is in the pvs
 459                 else
 460                 {
 461                         int leafstackpos;
 462                         mportal_t *p;
 463                         mleaf_t *leafstack[8192];
 464                         // simple-frustum portal method:
 465                         // follows portals leading outward from viewleaf, does not venture
 466                         // offscreen or into leafs that are not visible, faster than
 467                         // Quake's RecursiveWorldNode and vastly better in unvised maps,
 468                         // often culls some surfaces that pvs alone would miss
 469                         // (such as a room in pvs that is hidden behind a wall, but the
 470                         //  passage leading to the room is off-screen)
 471                         leafstack[0] = viewleaf;
 472                         leafstackpos = 1;
 473                         while (leafstackpos)
 474                         {
 475                                 r_refdef.stats.world_leafs++;
 476                                 leaf = leafstack[--leafstackpos];
 477                                 r_viewcache.world_leafvisible[leaf - model->brush.data_leafs] = true;
 478                                 // mark any surfaces bounding this leaf
 479                                 if (leaf->numleafsurfaces)
 480                                         for (i = 0, mark = leaf->firstleafsurface;i < leaf->numleafsurfaces;i++, mark++)
 481                                                 r_viewcache.world_surfacevisible[*mark] = true;
 482                                 // follow portals into other leafs
 483                                 // the checks are:
 484                                 // if viewer is behind portal (portal faces outward into the scene)
 485                                 // and the portal polygon's bounding box is on the screen
 486                                 // and the leaf has not been visited yet
 487                                 // and the leaf is visible in the pvs
 488                                 // (the first two checks won't cause as many cache misses as the leaf checks)
 489                                 for (p = leaf->portals;p;p = p->next)
 490                                 {
 491                                         r_refdef.stats.world_portals++;
 492                                         if (DotProduct(r_view.origin, p->plane.normal) < (p->plane.dist + 1) && !R_CullBox(p->mins, p->maxs) && !r_viewcache.world_leafvisible[p->past - model->brush.data_leafs] && CHECKPVSBIT(r_viewcache.world_pvsbits, p->past->clusterindex))
 493                                                 leafstack[leafstackpos++] = p->past;
 494                                 }
 495                         }
 496                 }
 497         }
 498 }
 499
 500 void R_Q1BSP_DrawSky(entity_render_t *ent)
 501 {
 502         if (ent->model == NULL)
 503                 return;
 504         R_DrawSurfaces(ent, true);
 505 }
 506
 507 void R_Q1BSP_Draw(entity_render_t *ent)
 508 {
 509         model_t *model = ent->model;
 510         if (model == NULL)
 511                 return;
 512         R_DrawSurfaces(ent, false);
 513 }
 514
 515 typedef struct r_q1bsp_getlightinfo_s
 516 {
 517         model_t *model;
 518         vec3_t relativelightorigin;
 519         float lightradius;
 520         int *outleaflist;
 521         unsigned char *outleafpvs;
 522         int outnumleafs;
 523         int *outsurfacelist;
 524         unsigned char *outsurfacepvs;
 525         int outnumsurfaces;
 526         vec3_t outmins;
 527         vec3_t outmaxs;
 528         vec3_t lightmins;
 529         vec3_t lightmaxs;
 530         const unsigned char *pvs;
 531 }
 532 r_q1bsp_getlightinfo_t;
 533
 534 void R_Q1BSP_RecursiveGetLightInfo(r_q1bsp_getlightinfo_t *info, mnode_t *node)
 535 {
 536         int sides;
 537         mleaf_t *leaf;
 538         for (;;)
 539         {
 540                 mplane_t *plane = node->plane;
 541                 //if (!BoxesOverlap(info->lightmins, info->lightmaxs, node->mins, node->maxs))
 542                 //      return;
 543                 if (!plane)
 544                         break;
 545                 if (plane->type < 3)
 546                         sides = ((info->lightmaxs[plane->type] >= plane->dist) | ((info->lightmins[plane->type] < plane->dist) << 1));
 547                 else
 548                         sides = BoxOnPlaneSide(info->lightmins, info->lightmaxs, plane);
 549                 if (sides == 3)
 550                 {
 551                         R_Q1BSP_RecursiveGetLightInfo(info, node->children[0]);
 552                         node = node->children[1];
 553                 }
 554                 else if (sides == 0)
 555                         return; // ERROR: NAN bounding box!
 556                 else
 557                         node = node->children[sides - 1];
 558         }
 559         leaf = (mleaf_t *)node;
 560         if (info->pvs == NULL || CHECKPVSBIT(info->pvs, leaf->clusterindex))
 561         {
 562                 info->outmins[0] = min(info->outmins[0], leaf->mins[0]);
 563                 info->outmins[1] = min(info->outmins[1], leaf->mins[1]);
 564                 info->outmins[2] = min(info->outmins[2], leaf->mins[2]);
 565                 info->outmaxs[0] = max(info->outmaxs[0], leaf->maxs[0]);
 566                 info->outmaxs[1] = max(info->outmaxs[1], leaf->maxs[1]);
 567                 info->outmaxs[2] = max(info->outmaxs[2], leaf->maxs[2]);
 568                 if (info->outleafpvs)
 569                 {
 570                         int leafindex = leaf - info->model->brush.data_leafs;
 571                         if (!CHECKPVSBIT(info->outleafpvs, leafindex))
 572                         {
 573                                 SETPVSBIT(info->outleafpvs, leafindex);
 574                                 info->outleaflist[info->outnumleafs++] = leafindex;
 575                         }
 576                 }
 577                 if (info->outsurfacepvs)
 578                 {
 579                         int leafsurfaceindex;
 580                         for (leafsurfaceindex = 0;leafsurfaceindex < leaf->numleafsurfaces;leafsurfaceindex++)
 581                         {
 582                                 int surfaceindex = leaf->firstleafsurface[leafsurfaceindex];
 583                                 if (!CHECKPVSBIT(info->outsurfacepvs, surfaceindex))
 584                                 {
 585                                         msurface_t *surface = info->model->data_surfaces + surfaceindex;
 586                                         if (BoxesOverlap(info->lightmins, info->lightmaxs, surface->mins, surface->maxs))
 587                                         {
 588                                                 int triangleindex, t;
 589                                                 const int *e;
 590                                                 const vec_t *v[3];
 591                                                 for (triangleindex = 0, t = surface->num_firstshadowmeshtriangle, e = info->model->brush.shadowmesh->element3i + t * 3;triangleindex < surface->num_triangles;triangleindex++, t++, e += 3)
 592                                                 {
 593                                                         v[0] = info->model->brush.shadowmesh->vertex3f + e[0] * 3;
 594                                                         v[1] = info->model->brush.shadowmesh->vertex3f + e[1] * 3;
 595                                                         v[2] = info->model->brush.shadowmesh->vertex3f + e[2] * 3;
 596                                                         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])))
 597                                                         {
 598                                                                 SETPVSBIT(info->outsurfacepvs, surfaceindex);
 599                                                                 info->outsurfacelist[info->outnumsurfaces++] = surfaceindex;
 600                                                                 break;
 601                                                         }
 602                                                 }
 603                                         }
 604                                 }
 605                         }
 606                 }
 607         }
 608 }
 609
 610 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)
 611 {
 612         r_q1bsp_getlightinfo_t info;
 613         VectorCopy(relativelightorigin, info.relativelightorigin);
 614         info.lightradius = lightradius;
 615         info.lightmins[0] = info.relativelightorigin[0] - info.lightradius;
 616         info.lightmins[1] = info.relativelightorigin[1] - info.lightradius;
 617         info.lightmins[2] = info.relativelightorigin[2] - info.lightradius;
 618         info.lightmaxs[0] = info.relativelightorigin[0] + info.lightradius;
 619         info.lightmaxs[1] = info.relativelightorigin[1] + info.lightradius;
 620         info.lightmaxs[2] = info.relativelightorigin[2] + info.lightradius;
 621         if (ent->model == NULL)
 622         {
 623                 VectorCopy(info.lightmins, outmins);
 624                 VectorCopy(info.lightmaxs, outmaxs);
 625                 *outnumleafspointer = 0;
 626                 *outnumsurfacespointer = 0;
 627                 return;
 628         }
 629         info.model = ent->model;
 630         info.outleaflist = outleaflist;
 631         info.outleafpvs = outleafpvs;
 632         info.outnumleafs = 0;
 633         info.outsurfacelist = outsurfacelist;
 634         info.outsurfacepvs = outsurfacepvs;
 635         info.outnumsurfaces = 0;
 636         VectorCopy(info.relativelightorigin, info.outmins);
 637         VectorCopy(info.relativelightorigin, info.outmaxs);
 638         memset(outleafpvs, 0, (info.model->brush.num_leafs + 7) >> 3);
 639         memset(outsurfacepvs, 0, (info.model->nummodelsurfaces + 7) >> 3);
 640         if (info.model->brush.GetPVS)
 641                 info.pvs = info.model->brush.GetPVS(info.model, info.relativelightorigin);
 642         else
 643                 info.pvs = NULL;
 644         R_UpdateAllTextureInfo(ent);
 645         if (r_shadow_compilingrtlight)
 646         {
 647                 // use portal recursion for exact light volume culling, and exact surface checking
 648                 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);
 649         }
 650         else if (r_shadow_realtime_dlight_portalculling.integer)
 651         {
 652                 // use portal recursion for exact light volume culling, but not the expensive exact surface checking
 653                 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);
 654         }
 655         else
 656         {
 657                 // use BSP recursion as lights are often small
 658                 R_Q1BSP_RecursiveGetLightInfo(&info, info.model->brush.data_nodes);
 659         }
 660
 661         // limit combined leaf box to light boundaries
 662         outmins[0] = max(info.outmins[0] - 1, info.lightmins[0]);
 663         outmins[1] = max(info.outmins[1] - 1, info.lightmins[1]);
 664         outmins[2] = max(info.outmins[2] - 1, info.lightmins[2]);
 665         outmaxs[0] = min(info.outmaxs[0] + 1, info.lightmaxs[0]);
 666         outmaxs[1] = min(info.outmaxs[1] + 1, info.lightmaxs[1]);
 667         outmaxs[2] = min(info.outmaxs[2] + 1, info.lightmaxs[2]);
 668
 669         *outnumleafspointer = info.outnumleafs;
 670         *outnumsurfacespointer = info.outnumsurfaces;
 671 }
 672
 673 void R_Q1BSP_CompileShadowVolume(entity_render_t *ent, vec3_t relativelightorigin, float lightradius, int numsurfaces, const int *surfacelist)
 674 {
 675         model_t *model = ent->model;
 676         msurface_t *surface;
 677         int surfacelistindex;
 678         float projectdistance = lightradius + model->radius*2 + r_shadow_projectdistance.value;
 679         texture_t *texture;
 680         r_shadow_compilingrtlight->static_meshchain_shadow = Mod_ShadowMesh_Begin(r_main_mempool, 32768, 32768, NULL, NULL, NULL, false, false, true);
 681         R_Shadow_PrepareShadowMark(model->brush.shadowmesh->numtriangles);
 682         for (surfacelistindex = 0;surfacelistindex < numsurfaces;surfacelistindex++)
 683         {
 684                 surface = model->data_surfaces + surfacelist[surfacelistindex];
 685                 texture = surface->texture;
 686                 if ((texture->basematerialflags & (MATERIALFLAG_NODRAW | MATERIALFLAG_TRANSPARENT | MATERIALFLAG_WALL)) != MATERIALFLAG_WALL)
 687                         continue;
 688                 if ((texture->textureflags & (Q3TEXTUREFLAG_TWOSIDED | Q3TEXTUREFLAG_AUTOSPRITE | Q3TEXTUREFLAG_AUTOSPRITE2)) || (ent->flags & RENDER_NOCULLFACE))
 689                         continue;
 690                 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);
 691         }
 692         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);
 693         r_shadow_compilingrtlight->static_meshchain_shadow = Mod_ShadowMesh_Finish(r_main_mempool, r_shadow_compilingrtlight->static_meshchain_shadow, false, false);
 694 }
 695
 696 void R_Q1BSP_DrawShadowVolume_Batch(const vec3_t relativelightorigin, const vec3_t lightmins, const vec3_t lightmaxs, int texturenumsurfaces, msurface_t **texturesurfacelist)
 697 {
 698         int texturesurfaceindex;
 699         RSurf_PrepareVerticesForBatch(false, false, texturenumsurfaces, texturesurfacelist);
 700         for (texturesurfaceindex = 0;texturesurfaceindex < texturenumsurfaces;texturesurfaceindex++)
 701         {
 702                 msurface_t *surface = texturesurfacelist[texturesurfaceindex];
 703                 R_Shadow_MarkVolumeFromBox(surface->num_firsttriangle, surface->num_triangles, rsurface_vertex3f, rsurface_model->surfmesh.data_element3i, relativelightorigin, lightmins, lightmaxs, surface->mins, surface->maxs);
 704         }
 705 }
 706
 707 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)
 708 {
 709         model_t *model = ent->model;
 710         msurface_t *surface;
 711         int modelsurfacelistindex;
 712         int f = 0;
 713         float projectdistance = lightradius + model->radius*2 + r_shadow_projectdistance.value;
 714         texture_t *t = NULL;
 715         const int maxsurfacelist = 1024;
 716         int numsurfacelist = 0;
 717         msurface_t *surfacelist[1024];
 718         // check the box in modelspace, it was already checked in worldspace
 719         if (!BoxesOverlap(model->normalmins, model->normalmaxs, lightmins, lightmaxs))
 720                 return;
 721         R_UpdateAllTextureInfo(ent);
 722         if (model->brush.shadowmesh)
 723         {
 724                 R_Shadow_PrepareShadowMark(model->brush.shadowmesh->numtriangles);
 725                 for (modelsurfacelistindex = 0;modelsurfacelistindex < modelnumsurfaces;modelsurfacelistindex++)
 726                 {
 727                         surface = model->data_surfaces + modelsurfacelist[modelsurfacelistindex];
 728                         t = surface->texture->currentframe;
 729                         if ((t->currentmaterialflags & (MATERIALFLAG_NODRAW | MATERIALFLAG_TRANSPARENT | MATERIALFLAG_WALL)) != MATERIALFLAG_WALL)
 730                                 continue;
 731                         if ((t->textureflags & (Q3TEXTUREFLAG_TWOSIDED | Q3TEXTUREFLAG_AUTOSPRITE | Q3TEXTUREFLAG_AUTOSPRITE2)) || (ent->flags & RENDER_NOCULLFACE))
 732                                 continue;
 733                         R_Shadow_MarkVolumeFromBox(surface->num_firstshadowmeshtriangle, surface->num_triangles, model->brush.shadowmesh->vertex3f, model->brush.shadowmesh->element3i, relativelightorigin, lightmins, lightmaxs, surface->mins, surface->maxs);
 734                 }
 735                 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);
 736         }
 737         else
 738         {
 739                 projectdistance = lightradius + model->radius*2;
 740                 RSurf_ActiveEntity(ent, false, false);
 741                 R_Shadow_PrepareShadowMark(model->surfmesh.num_triangles);
 742                 // identify lit faces within the bounding box
 743                 for (modelsurfacelistindex = 0;modelsurfacelistindex < modelnumsurfaces;modelsurfacelistindex++)
 744                 {
 745                         surface = model->data_surfaces + modelsurfacelist[modelsurfacelistindex];
 746                         if (t != surface->texture || numsurfacelist >= maxsurfacelist)
 747                         {
 748                                 if (numsurfacelist)
 749                                 {
 750                                         R_Q1BSP_DrawShadowVolume_Batch(relativelightorigin, lightmins, lightmaxs, numsurfacelist, surfacelist);
 751                                         numsurfacelist = 0;
 752                                 }
 753                                 t = surface->texture;
 754                                 rsurface_texture = t->currentframe;
 755                                 f = (rsurface_texture->currentmaterialflags & (MATERIALFLAG_NODRAW | MATERIALFLAG_TRANSPARENT | MATERIALFLAG_WALL)) == MATERIALFLAG_WALL;
 756                         }
 757                         if (f && surface->num_triangles)
 758                                 surfacelist[numsurfacelist++] = surface;
 759                 }
 760                 if (numsurfacelist)
 761                         R_Q1BSP_DrawShadowVolume_Batch(relativelightorigin, lightmins, lightmaxs, numsurfacelist, surfacelist);
 762                 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);
 763         }
 764 }
 765
 766 #define BATCHSIZE 256
 767
 768 static void R_Q1BSP_DrawLight_TransparentCallback(const entity_render_t *ent, const rtlight_t *rtlight, int numsurfaces, int *surfacelist)
 769 {
 770         int surfacelistindex, batchcount;
 771         texture_t *t;
 772         msurface_t *batchsurfaces[BATCHSIZE];
 773         // note: in practice this never actually batches, oh well
 774         R_Shadow_RenderMode_Begin();
 775         R_Shadow_RenderMode_ActiveLight((rtlight_t *)rtlight);
 776         R_Shadow_RenderMode_Lighting(false, true);
 777         R_Shadow_SetupEntityLight(ent);
 778         t = NULL;
 779         batchcount = 0;
 780         for (surfacelistindex = 0;surfacelistindex < numsurfaces;surfacelistindex++)
 781         {
 782                 msurface_t *surface = ent->model->data_surfaces + surfacelist[surfacelistindex];
 783                 if (t != surface->texture)
 784                 {
 785                         if (batchcount > 0)
 786                                 R_Shadow_RenderSurfacesLighting(batchcount, batchsurfaces);
 787                         batchcount = 0;
 788                         t = surface->texture;
 789                         R_UpdateTextureInfo(ent, t);
 790                         rsurface_texture = t->currentframe;
 791                 }
 792                 batchsurfaces[batchcount++] = surface;
 793         }
 794         if (batchcount > 0)
 795                 R_Shadow_RenderSurfacesLighting(batchcount, batchsurfaces);
 796         R_Shadow_RenderMode_End();
 797 }
 798
 799 static void R_Q1BSP_DrawLight_TransparentBatch(int batchnumsurfaces, msurface_t **batchsurfacelist)
 800 {
 801         int batchsurfaceindex;
 802         msurface_t *batchsurface;
 803         vec3_t tempcenter, center;
 804         for (batchsurfaceindex = 0;batchsurfaceindex < batchnumsurfaces;batchsurfaceindex++)
 805         {
 806                 batchsurface = batchsurfacelist[batchsurfaceindex];
 807                 tempcenter[0] = (batchsurface->mins[0] + batchsurface->maxs[0]) * 0.5f;
 808                 tempcenter[1] = (batchsurface->mins[1] + batchsurface->maxs[1]) * 0.5f;
 809                 tempcenter[2] = (batchsurface->mins[2] + batchsurface->maxs[2]) * 0.5f;
 810                 Matrix4x4_Transform(&rsurface_entity->matrix, tempcenter, center);
 811                 R_MeshQueue_AddTransparent(rsurface_texture->currentmaterialflags & MATERIALFLAG_NODEPTHTEST ? r_view.origin : center, R_Q1BSP_DrawLight_TransparentCallback, rsurface_entity, batchsurface - rsurface_model->data_surfaces, r_shadow_rtlight);
 812         }
 813 }
 814
 815 #define RSURF_MAX_BATCHSURFACES 1024
 816
 817 void R_Q1BSP_DrawLight(entity_render_t *ent, int numsurfaces, const int *surfacelist)
 818 {
 819         model_t *model = ent->model;
 820         msurface_t *surface;
 821         int surfacelistindex, batchnumsurfaces;
 822         msurface_t *batchsurfacelist[RSURF_MAX_BATCHSURFACES];
 823         texture_t *tex;
 824         qboolean skip;
 825         CHECKGLERROR
 826         RSurf_ActiveEntity(ent, true, true);
 827         R_UpdateAllTextureInfo(ent);
 828         tex = NULL;
 829         rsurface_texture = NULL;
 830         skip = false;
 831         batchnumsurfaces = 0;
 832         CHECKGLERROR
 833         for (surfacelistindex = 0;surfacelistindex < numsurfaces;surfacelistindex++)
 834         {
 835                 if ((ent == r_refdef.worldentity && !r_viewcache.world_surfacevisible[surfacelist[surfacelistindex]]))
 836                         continue;
 837                 surface = model->data_surfaces + surfacelist[surfacelistindex];
 838                 r_refdef.stats.lights_lighttriangles += surface->num_triangles;
 839                 if (tex != surface->texture)
 840                 {
 841                         if (batchnumsurfaces > 0)
 842                         {
 843                                 if (rsurface_texture->currentmaterialflags & MATERIALFLAG_BLENDED)
 844                                         R_Q1BSP_DrawLight_TransparentBatch(batchnumsurfaces, batchsurfacelist);
 845                                 else
 846                                         R_Shadow_RenderSurfacesLighting(batchnumsurfaces, batchsurfacelist);
 847                                 batchnumsurfaces = 0;
 848                         }
 849                         tex = surface->texture;
 850                         rsurface_texture = surface->texture->currentframe;
 851                         skip = (rsurface_texture->currentmaterialflags & MATERIALFLAG_SKY) != 0;
 852                         if (skip)
 853                                 continue;
 854                 }
 855                 if (!skip && surface->num_triangles)
 856                 {
 857                         if (batchnumsurfaces == RSURF_MAX_BATCHSURFACES)
 858                         {
 859                                 if (rsurface_texture->currentmaterialflags & MATERIALFLAG_BLENDED)
 860                                         R_Q1BSP_DrawLight_TransparentBatch(batchnumsurfaces, batchsurfacelist);
 861                                 else
 862                                         R_Shadow_RenderSurfacesLighting(batchnumsurfaces, batchsurfacelist);
 863                                 batchnumsurfaces = 0;
 864                         }
 865                         batchsurfacelist[batchnumsurfaces++] = surface;
 866                 }
 867         }
 868         if (batchnumsurfaces > 0)
 869         {
 870                 if (rsurface_texture->currentmaterialflags & MATERIALFLAG_BLENDED)
 871                         R_Q1BSP_DrawLight_TransparentBatch(batchnumsurfaces, batchsurfacelist);
 872                 else
 873                         R_Shadow_RenderSurfacesLighting(batchnumsurfaces, batchsurfacelist);
 874                 batchnumsurfaces = 0;
 875         }
 876 }
 877
 878 //Made by [515]
 879 void R_ReplaceWorldTexture (void)
 880 {
 881         model_t         *m;
 882         texture_t       *t;
 883         int                     i;
 884         const char      *r, *newt;
 885         m = r_refdef.worldmodel;
 886
 887         if(Cmd_Argc() < 2)
 888         {
 889                 Con_Print("r_replacemaptexture <texname> <newtexname> - replaces texture\n");
 890                 Con_Print("r_replacemaptexture <texname> - switch back to default texture\n");
 891                 return;
 892         }
 893         if(!cl.islocalgame || !cl.worldmodel)
 894         {
 895                 Con_Print("This command works only in singleplayer\n");
 896                 return;
 897         }
 898         r = Cmd_Argv(1);
 899         newt = Cmd_Argv(2);
 900         if(!newt[0])
 901                 newt = r;
 902         for(i=0,t=m->data_textures;i<m->num_textures;i++,t++)
 903         {
 904                 if(t->width && !strcasecmp(t->name, r))
 905                 {
 906                         if(Mod_LoadSkinFrame(&t->skinframes[0], (char*)newt, TEXF_MIPMAP | TEXF_ALPHA | TEXF_PRECACHE | TEXF_PICMIP, false, r_fullbrights.integer))
 907                         {
 908                                 Con_Printf("%s replaced with %s\n", r, newt);
 909                                 return;
 910                         }
 911                         else
 912                         {
 913                                 Con_Printf("%s was not found\n", newt);
 914                                 Mod_LoadSkinFrame(&t->skinframes[0], (char*)r, TEXF_MIPMAP | TEXF_ALPHA | TEXF_PRECACHE | TEXF_PICMIP, false, r_fullbrights.integer);//back to default
 915                                 return;
 916                         }
 917                 }
 918         }
 919 }
 920
 921 //Made by [515]
 922 void R_ListWorldTextures (void)
 923 {
 924         model_t         *m;
 925         texture_t       *t;
 926         int                     i;
 927         m = r_refdef.worldmodel;
 928
 929         Con_Print("Worldmodel textures :\n");
 930         for(i=0,t=m->data_textures;i<m->num_textures;i++,t++)
 931                 if (t->numskinframes)
 932                         Con_Printf("%s\n", t->name);
 933 }
 934
 935 #if 0
 936 static void gl_surf_start(void)
 937 {
 938 }
 939
 940 static void gl_surf_shutdown(void)
 941 {
 942 }
 943
 944 static void gl_surf_newmap(void)
 945 {
 946 }
 947 #endif
 948
 949 void GL_Surf_Init(void)
 950 {
 951
 952         Cvar_RegisterVariable(&r_ambient);
 953         Cvar_RegisterVariable(&r_lockpvs);
 954         Cvar_RegisterVariable(&r_lockvisibility);
 955         Cvar_RegisterVariable(&r_useportalculling);
 956         Cvar_RegisterVariable(&r_q3bsp_renderskydepth);
 957
 958         Cmd_AddCommand ("r_replacemaptexture", R_ReplaceWorldTexture, "override a map texture for testing purposes");   // By [515]
 959         Cmd_AddCommand ("r_listmaptextures", R_ListWorldTextures, "list all textures used by the current map"); // By [515]
 960
 961         //R_RegisterModule("GL_Surf", gl_surf_start, gl_surf_shutdown, gl_surf_newmap);
 962 }
 963