added optimized case in R_Q1BSP_GetLightInfo surface culling that skips checking...
[divverent/darkplaces.git] / 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)
493                                          && !r_viewcache.world_leafvisible[p->past - model->brush.data_leafs]
494                                          && CHECKPVSBIT(r_viewcache.world_pvsbits, p->past->clusterindex)
495                                          && !R_CullBox(p->mins, p->maxs)
496                                          && leafstackpos < (int)(sizeof(leafstack) / sizeof(leafstack[0])))
497                                                 leafstack[leafstackpos++] = p->past;
498                                 }
499                         }
500                 }
501         }
502 }
503
504 void R_Q1BSP_DrawSky(entity_render_t *ent)
505 {
506         if (ent->model == NULL)
507                 return;
508         if (ent == r_refdef.worldentity)
509                 R_DrawWorldSurfaces(true);
510         else
511                 R_DrawModelSurfaces(ent, true);
512 }
513
514 void R_Q1BSP_Draw(entity_render_t *ent)
515 {
516         model_t *model = ent->model;
517         if (model == NULL)
518                 return;
519         if (ent == r_refdef.worldentity)
520                 R_DrawWorldSurfaces(false);
521         else
522                 R_DrawModelSurfaces(ent, false);
523 }
524
525 typedef struct r_q1bsp_getlightinfo_s
526 {
527         model_t *model;
528         vec3_t relativelightorigin;
529         float lightradius;
530         int *outleaflist;
531         unsigned char *outleafpvs;
532         int outnumleafs;
533         int *outsurfacelist;
534         unsigned char *outsurfacepvs;
535         unsigned char *tempsurfacepvs;
536         int outnumsurfaces;
537         vec3_t outmins;
538         vec3_t outmaxs;
539         vec3_t lightmins;
540         vec3_t lightmaxs;
541         const unsigned char *pvs;
542         qboolean svbsp_active;
543         qboolean svbsp_insertoccluder;
544 }
545 r_q1bsp_getlightinfo_t;
546
547 void R_Q1BSP_RecursiveGetLightInfo(r_q1bsp_getlightinfo_t *info, mnode_t *node)
548 {
549         int sides;
550         mleaf_t *leaf;
551         for (;;)
552         {
553                 mplane_t *plane = node->plane;
554                 //if (!BoxesOverlap(info->lightmins, info->lightmaxs, node->mins, node->maxs))
555                 //      return;
556                 if (!plane)
557                         break;
558                 if (plane->type < 3)
559                 {
560                         if (info->lightmins[plane->type] > plane->dist)
561                                 node = node->children[0];
562                         else if (info->lightmaxs[plane->type] < plane->dist)
563                                 node = node->children[1];
564                         else if (info->relativelightorigin[plane->type] >= plane->dist)
565                         {
566                                 R_Q1BSP_RecursiveGetLightInfo(info, node->children[0]);
567                                 node = node->children[1];
568                         }
569                         else
570                         {
571                                 R_Q1BSP_RecursiveGetLightInfo(info, node->children[1]);
572                                 node = node->children[0];
573                         }
574                 }
575                 else
576                 {
577                         sides = BoxOnPlaneSide(info->lightmins, info->lightmaxs, plane);
578                         if (sides == 3)
579                         {
580                                 // recurse front side first because the svbsp building prefers it
581                                 if (PlaneDist(info->relativelightorigin, plane) >= 0)
582                                 {
583                                         R_Q1BSP_RecursiveGetLightInfo(info, node->children[0]);
584                                         node = node->children[1];
585                                 }
586                                 else
587                                 {
588                                         R_Q1BSP_RecursiveGetLightInfo(info, node->children[1]);
589                                         node = node->children[0];
590                                 }
591                         }
592                         else if (sides == 0)
593                                 return; // ERROR: NAN bounding box!
594                         else
595                                 node = node->children[sides - 1];
596                 }
597         }
598         leaf = (mleaf_t *)node;
599         if (info->svbsp_active)
600         {
601                 int i;
602                 mportal_t *portal;
603                 double points[128][3];
604                 for (portal = leaf->portals;portal;portal = portal->next)
605                 {
606                         for (i = 0;i < portal->numpoints;i++)
607                                 VectorCopy(portal->points[i].position, points[i]);
608                         if (SVBSP_AddPolygon(&r_svbsp, portal->numpoints, points[0], false, NULL, NULL, 0) & 2)
609                                 break;
610                 }
611                 if (portal == NULL)
612                         return; // no portals of this leaf visible
613         }
614         else
615         {
616                 if (r_shadow_frontsidecasting.integer && info->pvs != NULL && !CHECKPVSBIT(info->pvs, leaf->clusterindex))
617                         return;
618         }
619         // inserting occluders does not alter the leaf info
620         if (!info->svbsp_insertoccluder)
621         {
622                 info->outmins[0] = min(info->outmins[0], leaf->mins[0]);
623                 info->outmins[1] = min(info->outmins[1], leaf->mins[1]);
624                 info->outmins[2] = min(info->outmins[2], leaf->mins[2]);
625                 info->outmaxs[0] = max(info->outmaxs[0], leaf->maxs[0]);
626                 info->outmaxs[1] = max(info->outmaxs[1], leaf->maxs[1]);
627                 info->outmaxs[2] = max(info->outmaxs[2], leaf->maxs[2]);
628                 if (info->outleafpvs)
629                 {
630                         int leafindex = leaf - info->model->brush.data_leafs;
631                         if (!CHECKPVSBIT(info->outleafpvs, leafindex))
632                         {
633                                 SETPVSBIT(info->outleafpvs, leafindex);
634                                 info->outleaflist[info->outnumleafs++] = leafindex;
635                         }
636                 }
637         }
638         if (info->outsurfacepvs)
639         {
640                 int leafsurfaceindex;
641                 int surfaceindex;
642                 int triangleindex, t;
643                 msurface_t *surface;
644                 const int *e;
645                 const vec_t *v[3];
646                 double v2[3][3];
647                 for (leafsurfaceindex = 0;leafsurfaceindex < leaf->numleafsurfaces;leafsurfaceindex++)
648                 {
649                         surfaceindex = leaf->firstleafsurface[leafsurfaceindex];
650                         if (!CHECKPVSBIT(info->outsurfacepvs, surfaceindex))
651                         {
652                                 surface = info->model->data_surfaces + surfaceindex;
653                                 if (BoxesOverlap(info->lightmins, info->lightmaxs, surface->mins, surface->maxs)
654                                  && (!info->svbsp_insertoccluder || !(surface->texture->currentframe->currentmaterialflags & MATERIALFLAG_NOSHADOW)))
655                                 {
656                                         if (BoxInsideBox(surface->mins, surface->maxs, info->lightmins, info->lightmaxs))
657                                         {
658                                                 // surface is entirely inside light box
659                                                 for (triangleindex = 0, t = surface->num_firstshadowmeshtriangle, e = info->model->brush.shadowmesh->element3i + t * 3;triangleindex < surface->num_triangles;triangleindex++, t++, e += 3)
660                                                 {
661                                                         v[0] = info->model->brush.shadowmesh->vertex3f + e[0] * 3;
662                                                         v[1] = info->model->brush.shadowmesh->vertex3f + e[1] * 3;
663                                                         v[2] = info->model->brush.shadowmesh->vertex3f + e[2] * 3;
664                                                         if ((!r_shadow_frontsidecasting.integer || PointInfrontOfTriangle(info->relativelightorigin, v[0], v[1], v[2])))
665                                                         {
666                                                                 if (info->svbsp_active)
667                                                                 {
668                                                                         VectorCopy(v[0], v2[0]);
669                                                                         VectorCopy(v[1], v2[1]);
670                                                                         VectorCopy(v[2], v2[2]);
671                                                                         if (!(SVBSP_AddPolygon(&r_svbsp, 3, v2[0], info->svbsp_insertoccluder, NULL, NULL, 0) & 2))
672                                                                                 continue;
673                                                                 }
674                                                                 SETPVSBIT(info->outsurfacepvs, surfaceindex);
675                                                                 info->outsurfacelist[info->outnumsurfaces++] = surfaceindex;
676                                                                 if (!info->svbsp_insertoccluder)
677                                                                         break;
678                                                         }
679                                                 }
680                                         }
681                                         else
682                                         {
683                                                 // surface is partially clipped by lightbox
684                                                 // check each triangle's bounding box
685                                                 for (triangleindex = 0, t = surface->num_firstshadowmeshtriangle, e = info->model->brush.shadowmesh->element3i + t * 3;triangleindex < surface->num_triangles;triangleindex++, t++, e += 3)
686                                                 {
687                                                         v[0] = info->model->brush.shadowmesh->vertex3f + e[0] * 3;
688                                                         v[1] = info->model->brush.shadowmesh->vertex3f + e[1] * 3;
689                                                         v[2] = info->model->brush.shadowmesh->vertex3f + e[2] * 3;
690                                                         if ((!r_shadow_frontsidecasting.integer || PointInfrontOfTriangle(info->relativelightorigin, v[0], v[1], v[2]))
691                                                          && info->lightmaxs[0] > min(v[0][0], min(v[1][0], v[2][0]))
692                                                          && info->lightmins[0] < max(v[0][0], max(v[1][0], v[2][0]))
693                                                          && info->lightmaxs[1] > min(v[0][1], min(v[1][1], v[2][1]))
694                                                          && info->lightmins[1] < max(v[0][1], max(v[1][1], v[2][1]))
695                                                          && info->lightmaxs[2] > min(v[0][2], min(v[1][2], v[2][2]))
696                                                          && info->lightmins[2] < max(v[0][2], max(v[1][2], v[2][2])))
697                                                         {
698                                                                 if (info->svbsp_active)
699                                                                 {
700                                                                         VectorCopy(v[0], v2[0]);
701                                                                         VectorCopy(v[1], v2[1]);
702                                                                         VectorCopy(v[2], v2[2]);
703                                                                         if (!(SVBSP_AddPolygon(&r_svbsp, 3, v2[0], info->svbsp_insertoccluder, NULL, NULL, 0) & 2))
704                                                                                 continue;
705                                                                 }
706                                                                 SETPVSBIT(info->outsurfacepvs, surfaceindex);
707                                                                 info->outsurfacelist[info->outnumsurfaces++] = surfaceindex;
708                                                                 if (!info->svbsp_insertoccluder)
709                                                                         break;
710                                                         }
711                                                 }
712                                         }
713                                 }
714                         }
715                 }
716         }
717 }
718
719 void R_Q1BSP_CallRecursiveGetLightInfo(r_q1bsp_getlightinfo_t *info, qboolean use_svbsp)
720 {
721         if (use_svbsp)
722         {
723                 double origin[3];
724                 VectorCopy(info->relativelightorigin, origin);
725                 if (!r_svbsp.nodes)
726                 {
727                         r_svbsp.maxnodes = max(r_svbsp.maxnodes, 1<<18);
728                         r_svbsp.nodes = Mem_Alloc(r_main_mempool, r_svbsp.maxnodes * sizeof(svbsp_node_t));
729                 }
730                 info->svbsp_active = true;
731                 info->svbsp_insertoccluder = true;
732                 for (;;)
733                 {
734                         SVBSP_Init(&r_svbsp, origin, r_svbsp.maxnodes, r_svbsp.nodes);
735                         R_Q1BSP_RecursiveGetLightInfo(info, info->model->brush.data_nodes);
736                         // if that failed, retry with more nodes
737                         if (r_svbsp.ranoutofnodes)
738                         {
739                                 // an upper limit is imposed
740                                 if (r_svbsp.maxnodes >= 2<<22)
741                                         break;
742                                 Mem_Free(r_svbsp.nodes);
743                                 r_svbsp.maxnodes *= 2;
744                                 r_svbsp.nodes = Mem_Alloc(tempmempool, r_svbsp.maxnodes * sizeof(svbsp_node_t));
745                         }
746                         else
747                                 break;
748                 }
749                 // now clear the surfacepvs array because we need to redo it
750                 memset(info->outsurfacepvs, 0, (info->model->nummodelsurfaces + 7) >> 3);
751                 info->outnumsurfaces = 0;
752         }
753         else
754                 info->svbsp_active = false;
755
756         // we HAVE to mark the leaf the light is in as lit, because portals are
757         // irrelevant to a leaf that the light source is inside of
758         // (and they are all facing away, too)
759         {
760                 mnode_t *node = info->model->brush.data_nodes;
761                 mleaf_t *leaf;
762                 while (node->plane)
763                         node = node->children[(node->plane->type < 3 ? info->relativelightorigin[node->plane->type] : DotProduct(info->relativelightorigin,node->plane->normal)) < node->plane->dist];
764                 leaf = (mleaf_t *)node;
765                 info->outmins[0] = min(info->outmins[0], leaf->mins[0]);
766                 info->outmins[1] = min(info->outmins[1], leaf->mins[1]);
767                 info->outmins[2] = min(info->outmins[2], leaf->mins[2]);
768                 info->outmaxs[0] = max(info->outmaxs[0], leaf->maxs[0]);
769                 info->outmaxs[1] = max(info->outmaxs[1], leaf->maxs[1]);
770                 info->outmaxs[2] = max(info->outmaxs[2], leaf->maxs[2]);
771                 if (info->outleafpvs)
772                 {
773                         int leafindex = leaf - info->model->brush.data_leafs;
774                         if (!CHECKPVSBIT(info->outleafpvs, leafindex))
775                         {
776                                 SETPVSBIT(info->outleafpvs, leafindex);
777                                 info->outleaflist[info->outnumleafs++] = leafindex;
778                         }
779                 }
780         }
781
782         info->svbsp_insertoccluder = false;
783         R_Q1BSP_RecursiveGetLightInfo(info, info->model->brush.data_nodes);
784         if (developer.integer >= 100 && use_svbsp)
785         {
786                 Con_Printf("GetLightInfo: svbsp built with %i nodes, polygon stats:\n", r_svbsp.numnodes);
787                 Con_Printf("occluders: %i accepted, %i rejected, %i fragments accepted, %i fragments rejected.\n", r_svbsp.stat_occluders_accepted, r_svbsp.stat_occluders_rejected, r_svbsp.stat_occluders_fragments_accepted, r_svbsp.stat_occluders_fragments_rejected);
788                 Con_Printf("queries  : %i accepted, %i rejected, %i fragments accepted, %i fragments rejected.\n", r_svbsp.stat_queries_accepted, r_svbsp.stat_queries_rejected, r_svbsp.stat_queries_fragments_accepted, r_svbsp.stat_queries_fragments_rejected);
789         }
790 }
791
792 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)
793 {
794         r_q1bsp_getlightinfo_t info;
795         VectorCopy(relativelightorigin, info.relativelightorigin);
796         info.lightradius = lightradius;
797         info.lightmins[0] = info.relativelightorigin[0] - info.lightradius;
798         info.lightmins[1] = info.relativelightorigin[1] - info.lightradius;
799         info.lightmins[2] = info.relativelightorigin[2] - info.lightradius;
800         info.lightmaxs[0] = info.relativelightorigin[0] + info.lightradius;
801         info.lightmaxs[1] = info.relativelightorigin[1] + info.lightradius;
802         info.lightmaxs[2] = info.relativelightorigin[2] + info.lightradius;
803         if (ent->model == NULL)
804         {
805                 VectorCopy(info.lightmins, outmins);
806                 VectorCopy(info.lightmaxs, outmaxs);
807                 *outnumleafspointer = 0;
808                 *outnumsurfacespointer = 0;
809                 return;
810         }
811         info.model = ent->model;
812         info.outleaflist = outleaflist;
813         info.outleafpvs = outleafpvs;
814         info.outnumleafs = 0;
815         info.outsurfacelist = outsurfacelist;
816         info.outsurfacepvs = outsurfacepvs;
817         info.outnumsurfaces = 0;
818         VectorCopy(info.relativelightorigin, info.outmins);
819         VectorCopy(info.relativelightorigin, info.outmaxs);
820         memset(outleafpvs, 0, (info.model->brush.num_leafs + 7) >> 3);
821         memset(outsurfacepvs, 0, (info.model->nummodelsurfaces + 7) >> 3);
822         if (info.model->brush.GetPVS && r_shadow_frontsidecasting.integer)
823                 info.pvs = info.model->brush.GetPVS(info.model, info.relativelightorigin);
824         else
825                 info.pvs = NULL;
826         R_UpdateAllTextureInfo(ent);
827
828         if (r_shadow_frontsidecasting.integer && r_shadow_compilingrtlight && r_shadow_realtime_world_compileportalculling.integer)
829         {
830                 // use portal recursion for exact light volume culling, and exact surface checking
831                 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);
832         }
833         else if (r_shadow_frontsidecasting.integer && r_shadow_realtime_dlight_portalculling.integer)
834         {
835                 // use portal recursion for exact light volume culling, but not the expensive exact surface checking
836                 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);
837         }
838         else
839         {
840                 // recurse the bsp tree, checking leafs and surfaces for visibility
841                 // optionally using svbsp for exact culling of compiled lights
842                 // (or if the user enables dlight svbsp culling, which is mostly for
843                 //  debugging not actual use)
844                 R_Q1BSP_CallRecursiveGetLightInfo(&info, r_shadow_compilingrtlight ? r_shadow_realtime_world_compilesvbsp.integer : r_shadow_realtime_dlight_svbspculling.integer);
845         }
846
847         // limit combined leaf box to light boundaries
848         outmins[0] = max(info.outmins[0] - 1, info.lightmins[0]);
849         outmins[1] = max(info.outmins[1] - 1, info.lightmins[1]);
850         outmins[2] = max(info.outmins[2] - 1, info.lightmins[2]);
851         outmaxs[0] = min(info.outmaxs[0] + 1, info.lightmaxs[0]);
852         outmaxs[1] = min(info.outmaxs[1] + 1, info.lightmaxs[1]);
853         outmaxs[2] = min(info.outmaxs[2] + 1, info.lightmaxs[2]);
854
855         *outnumleafspointer = info.outnumleafs;
856         *outnumsurfacespointer = info.outnumsurfaces;
857 }
858
859 void R_Q1BSP_CompileShadowVolume(entity_render_t *ent, vec3_t relativelightorigin, vec3_t relativelightdirection, float lightradius, int numsurfaces, const int *surfacelist)
860 {
861         model_t *model = ent->model;
862         msurface_t *surface;
863         int surfacelistindex;
864         float projectdistance = relativelightdirection ? lightradius : lightradius + model->radius*2 + r_shadow_projectdistance.value;
865         r_shadow_compilingrtlight->static_meshchain_shadow = Mod_ShadowMesh_Begin(r_main_mempool, 32768, 32768, NULL, NULL, NULL, false, false, true);
866         R_Shadow_PrepareShadowMark(model->brush.shadowmesh->numtriangles);
867         for (surfacelistindex = 0;surfacelistindex < numsurfaces;surfacelistindex++)
868         {
869                 surface = model->data_surfaces + surfacelist[surfacelistindex];
870                 if (surface->texture->currentframe->basematerialflags & MATERIALFLAG_NOSHADOW)
871                         continue;
872                 R_Shadow_MarkVolumeFromBox(surface->num_firstshadowmeshtriangle, surface->num_triangles, model->brush.shadowmesh->vertex3f, model->brush.shadowmesh->element3i, relativelightorigin, relativelightdirection, r_shadow_compilingrtlight->cullmins, r_shadow_compilingrtlight->cullmaxs, surface->mins, surface->maxs);
873         }
874         R_Shadow_VolumeFromList(model->brush.shadowmesh->numverts, model->brush.shadowmesh->numtriangles, model->brush.shadowmesh->vertex3f, model->brush.shadowmesh->element3i, model->brush.shadowmesh->neighbor3i, relativelightorigin, relativelightdirection, projectdistance, numshadowmark, shadowmarklist);
875         r_shadow_compilingrtlight->static_meshchain_shadow = Mod_ShadowMesh_Finish(r_main_mempool, r_shadow_compilingrtlight->static_meshchain_shadow, false, false);
876 }
877
878 void R_Q1BSP_DrawShadowVolume(entity_render_t *ent, vec3_t relativelightorigin, vec3_t relativelightdirection, float lightradius, int modelnumsurfaces, const int *modelsurfacelist, const vec3_t lightmins, const vec3_t lightmaxs)
879 {
880         model_t *model = ent->model;
881         msurface_t *surface;
882         int modelsurfacelistindex;
883         float projectdistance = relativelightdirection ? lightradius : lightradius + model->radius*2 + r_shadow_projectdistance.value;
884         // check the box in modelspace, it was already checked in worldspace
885         if (!BoxesOverlap(model->normalmins, model->normalmaxs, lightmins, lightmaxs))
886                 return;
887         R_UpdateAllTextureInfo(ent);
888         if (model->brush.shadowmesh)
889         {
890                 R_Shadow_PrepareShadowMark(model->brush.shadowmesh->numtriangles);
891                 for (modelsurfacelistindex = 0;modelsurfacelistindex < modelnumsurfaces;modelsurfacelistindex++)
892                 {
893                         surface = model->data_surfaces + modelsurfacelist[modelsurfacelistindex];
894                         if (surface->texture->currentframe->currentmaterialflags & MATERIALFLAG_NOSHADOW)
895                                 continue;
896                         R_Shadow_MarkVolumeFromBox(surface->num_firstshadowmeshtriangle, surface->num_triangles, model->brush.shadowmesh->vertex3f, model->brush.shadowmesh->element3i, relativelightorigin, relativelightdirection, lightmins, lightmaxs, surface->mins, surface->maxs);
897                 }
898                 R_Shadow_VolumeFromList(model->brush.shadowmesh->numverts, model->brush.shadowmesh->numtriangles, model->brush.shadowmesh->vertex3f, model->brush.shadowmesh->element3i, model->brush.shadowmesh->neighbor3i, relativelightorigin, relativelightdirection, projectdistance, numshadowmark, shadowmarklist);
899         }
900         else
901         {
902                 projectdistance = lightradius + model->radius*2;
903                 R_Shadow_PrepareShadowMark(model->surfmesh.num_triangles);
904                 // identify lit faces within the bounding box
905                 for (modelsurfacelistindex = 0;modelsurfacelistindex < modelnumsurfaces;modelsurfacelistindex++)
906                 {
907                         surface = model->data_surfaces + modelsurfacelist[modelsurfacelistindex];
908                         rsurface_texture = surface->texture->currentframe;
909                         if (rsurface_texture->currentmaterialflags & MATERIALFLAG_NOSHADOW)
910                                 continue;
911                         RSurf_PrepareVerticesForBatch(false, false, 1, &surface);
912                         R_Shadow_MarkVolumeFromBox(surface->num_firsttriangle, surface->num_triangles, rsurface_vertex3f, rsurface_model->surfmesh.data_element3i, relativelightorigin, relativelightdirection, lightmins, lightmaxs, surface->mins, surface->maxs);
913                 }
914                 R_Shadow_VolumeFromList(model->surfmesh.num_vertices, model->surfmesh.num_triangles, rsurface_vertex3f, model->surfmesh.data_element3i, model->surfmesh.data_neighbor3i, relativelightorigin, relativelightdirection, projectdistance, numshadowmark, shadowmarklist);
915         }
916 }
917
918 #define BATCHSIZE 256
919
920 static void R_Q1BSP_DrawLight_TransparentCallback(const entity_render_t *ent, const rtlight_t *rtlight, int numsurfaces, int *surfacelist)
921 {
922         int i, j, batchnumsurfaces, endsurface;
923         texture_t *t;
924         msurface_t *surface;
925         msurface_t *batchsurfaces[BATCHSIZE];
926         // note: in practice this never actually batches, oh well
927         R_Shadow_RenderMode_Begin();
928         R_Shadow_RenderMode_ActiveLight((rtlight_t *)rtlight);
929         R_Shadow_RenderMode_Lighting(false, true);
930         R_Shadow_SetupEntityLight(ent);
931         for (i = 0;i < numsurfaces;i = j)
932         {
933                 j = i + 1;
934                 surface = rsurface_model->data_surfaces + surfacelist[i];
935                 t = surface->texture;
936                 R_UpdateTextureInfo(ent, t);
937                 rsurface_texture = t->currentframe;
938                 endsurface = min(j + BATCHSIZE, numsurfaces);
939                 batchnumsurfaces = 0;
940                 batchsurfaces[batchnumsurfaces++] = surface;
941                 for (;j < endsurface;j++)
942                 {
943                         surface = rsurface_model->data_surfaces + surfacelist[j];
944                         if (t != surface->texture)
945                                 continue;
946                         batchsurfaces[batchnumsurfaces++] = surface;
947                 }
948                 R_Shadow_RenderSurfacesLighting(batchnumsurfaces, batchsurfaces);
949         }
950         R_Shadow_RenderMode_End();
951 }
952
953 static void R_Q1BSP_DrawLight_TransparentBatch(int batchnumsurfaces, msurface_t **batchsurfacelist)
954 {
955         int batchsurfaceindex;
956         msurface_t *batchsurface;
957         vec3_t tempcenter, center;
958         for (batchsurfaceindex = 0;batchsurfaceindex < batchnumsurfaces;batchsurfaceindex++)
959         {
960                 batchsurface = batchsurfacelist[batchsurfaceindex];
961                 tempcenter[0] = (batchsurface->mins[0] + batchsurface->maxs[0]) * 0.5f;
962                 tempcenter[1] = (batchsurface->mins[1] + batchsurface->maxs[1]) * 0.5f;
963                 tempcenter[2] = (batchsurface->mins[2] + batchsurface->maxs[2]) * 0.5f;
964                 Matrix4x4_Transform(&rsurface_entity->matrix, tempcenter, center);
965                 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);
966         }
967 }
968
969 #define RSURF_MAX_BATCHSURFACES 1024
970
971 void R_Q1BSP_DrawLight(entity_render_t *ent, int numsurfaces, const int *surfacelist)
972 {
973         model_t *model = ent->model;
974         msurface_t *surface;
975         int i, k, l, endsurface, batchnumsurfaces;
976         msurface_t *batchsurfacelist[RSURF_MAX_BATCHSURFACES];
977         texture_t *tex;
978         CHECKGLERROR
979         RSurf_ActiveModelEntity(ent, true, true);
980         R_UpdateAllTextureInfo(ent);
981         CHECKGLERROR
982         // this is a double loop because non-visible surface skipping has to be
983         // fast, and even if this is not the world model (and hence no visibility
984         // checking) the input surface list and batch buffer are different formats
985         // so some processing is necessary.  (luckily models have few surfaces)
986         for (i = 0;i < numsurfaces;)
987         {
988                 batchnumsurfaces = 0;
989                 endsurface = min(i + RSURF_MAX_BATCHSURFACES, numsurfaces);
990                 if (ent == r_refdef.worldentity)
991                 {
992                         for (;i < endsurface;i++)
993                                 if (r_viewcache.world_surfacevisible[surfacelist[i]])
994                                         batchsurfacelist[batchnumsurfaces++] = model->data_surfaces + surfacelist[i];
995                 }
996                 else
997                 {
998                         for (;i < endsurface;i++)
999                                 batchsurfacelist[batchnumsurfaces++] = model->data_surfaces + surfacelist[i];
1000                 }
1001                 if (!batchnumsurfaces)
1002                         continue;
1003                 for (k = 0;k < batchnumsurfaces;k = l)
1004                 {
1005                         surface = batchsurfacelist[k];
1006                         tex = surface->texture;
1007                         rsurface_texture = tex->currentframe;
1008                         for (l = k;l < batchnumsurfaces && tex == batchsurfacelist[l]->texture;l++)
1009                                 r_refdef.stats.lights_lighttriangles += batchsurfacelist[l]->num_triangles;
1010                         if (rsurface_texture->currentmaterialflags & (MATERIALFLAG_WALL | MATERIALFLAG_WATER))
1011                         {
1012                                 if (rsurface_texture->currentmaterialflags & MATERIALFLAG_BLENDED)
1013                                         R_Q1BSP_DrawLight_TransparentBatch(l - k, batchsurfacelist + k);
1014                                 else
1015                                         R_Shadow_RenderSurfacesLighting(l - k, batchsurfacelist + k);
1016                         }
1017                 }
1018         }
1019 }
1020
1021 //Made by [515]
1022 void R_ReplaceWorldTexture (void)
1023 {
1024         model_t         *m;
1025         texture_t       *t;
1026         int                     i;
1027         const char      *r, *newt;
1028         m = r_refdef.worldmodel;
1029
1030         if(Cmd_Argc() < 2)
1031         {
1032                 Con_Print("r_replacemaptexture <texname> <newtexname> - replaces texture\n");
1033                 Con_Print("r_replacemaptexture <texname> - switch back to default texture\n");
1034                 return;
1035         }
1036         if(!cl.islocalgame || !cl.worldmodel)
1037         {
1038                 Con_Print("This command works only in singleplayer\n");
1039                 return;
1040         }
1041         r = Cmd_Argv(1);
1042         newt = Cmd_Argv(2);
1043         if(!newt[0])
1044                 newt = r;
1045         for(i=0,t=m->data_textures;i<m->num_textures;i++,t++)
1046         {
1047                 if(t->width && !strcasecmp(t->name, r))
1048                 {
1049                         if(Mod_LoadSkinFrame(&t->skinframes[0], (char*)newt, TEXF_MIPMAP | TEXF_ALPHA | TEXF_PRECACHE | TEXF_PICMIP, false, r_fullbrights.integer))
1050                         {
1051                                 Con_Printf("%s replaced with %s\n", r, newt);
1052                                 return;
1053                         }
1054                         else
1055                         {
1056                                 Con_Printf("%s was not found\n", newt);
1057                                 Mod_LoadSkinFrame(&t->skinframes[0], (char*)r, TEXF_MIPMAP | TEXF_ALPHA | TEXF_PRECACHE | TEXF_PICMIP, false, r_fullbrights.integer);//back to default
1058                                 return;
1059                         }
1060                 }
1061         }
1062 }
1063
1064 //Made by [515]
1065 void R_ListWorldTextures (void)
1066 {
1067         model_t         *m;
1068         texture_t       *t;
1069         int                     i;
1070         m = r_refdef.worldmodel;
1071
1072         Con_Print("Worldmodel textures :\n");
1073         for(i=0,t=m->data_textures;i<m->num_textures;i++,t++)
1074                 if (t->numskinframes)
1075                         Con_Printf("%s\n", t->name);
1076 }
1077
1078 #if 0
1079 static void gl_surf_start(void)
1080 {
1081 }
1082
1083 static void gl_surf_shutdown(void)
1084 {
1085 }
1086
1087 static void gl_surf_newmap(void)
1088 {
1089 }
1090 #endif
1091
1092 void GL_Surf_Init(void)
1093 {
1094
1095         Cvar_RegisterVariable(&r_ambient);
1096         Cvar_RegisterVariable(&r_lockpvs);
1097         Cvar_RegisterVariable(&r_lockvisibility);
1098         Cvar_RegisterVariable(&r_useportalculling);
1099         Cvar_RegisterVariable(&r_q3bsp_renderskydepth);
1100
1101         Cmd_AddCommand ("r_replacemaptexture", R_ReplaceWorldTexture, "override a map texture for testing purposes");   // By [515]
1102         Cmd_AddCommand ("r_listmaptextures", R_ListWorldTextures, "list all textures used by the current map"); // By [515]
1103
1104         //R_RegisterModule("GL_Surf", gl_surf_start, gl_surf_shutdown, gl_surf_newmap);
1105 }
1106