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 #include "csprogs.h"
  26
  27 cvar_t r_ambient = {0, "r_ambient", "0", "brightens map, value is 0-128"};
  28 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)"};
  29 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)"};
  30 cvar_t r_useportalculling = {0, "r_useportalculling", "2", "improve framerate with r_novis 1 by using portal culling - still not as good as compiled visibility data in the map, but it helps (a value of 2 forces use of this even with vis data, which improves framerates in maps without too much complexity, but hurts in extremely complex maps, which is why 2 is not the default mode)"};
  31 cvar_t r_usesurfaceculling = {0, "r_usesurfaceculling", "1", "improve framerate by culling offscreen surfaces"};
  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         dp_model_t *model = ent->model;
  47         int *intblocklights;
  48         unsigned char *templight;
  49
  50         smax = (surface->lightmapinfo->extents[0]>>4)+1;
  51         tmax = (surface->lightmapinfo->extents[1]>>4)+1;
  52         size = smax*tmax;
  53         size3 = size*3;
  54
  55         r_refdef.stats.lightmapupdatepixels += size;
  56         r_refdef.stats.lightmapupdates++;
  57
  58         if (cl.buildlightmapmemorysize < size*sizeof(int[3]))
  59         {
  60                 cl.buildlightmapmemorysize = size*sizeof(int[3]);
  61                 if (cl.buildlightmapmemory)
  62                         Mem_Free(cl.buildlightmapmemory);
  63                 cl.buildlightmapmemory = (unsigned char *) Mem_Alloc(cls.levelmempool, cl.buildlightmapmemorysize);
  64         }
  65
  66         // these both point at the same buffer, templight is only used for final
  67         // processing and can replace the intblocklights data as it goes
  68         intblocklights = (int *)cl.buildlightmapmemory;
  69         templight = (unsigned char *)cl.buildlightmapmemory;
  70
  71         // update cached lighting info
  72         model->brushq1.lightmapupdateflags[surface - model->data_surfaces] = false;
  73
  74         lightmap = surface->lightmapinfo->samples;
  75
  76 // set to full bright if no light data
  77         bl = intblocklights;
  78         if (!model->brushq1.lightdata)
  79         {
  80                 for (i = 0;i < size3;i++)
  81                         bl[i] = 128*256;
  82         }
  83         else
  84         {
  85 // clear to no light
  86                 memset(bl, 0, size3*sizeof(*bl));
  87
  88 // add all the lightmaps
  89                 if (lightmap)
  90                         for (maps = 0;maps < MAXLIGHTMAPS && surface->lightmapinfo->styles[maps] != 255;maps++, lightmap += size3)
  91                                 for (scale = r_refdef.scene.lightstylevalue[surface->lightmapinfo->styles[maps]], i = 0;i < size3;i++)
  92                                         bl[i] += lightmap[i] * scale;
  93         }
  94
  95         stain = surface->lightmapinfo->stainsamples;
  96         bl = intblocklights;
  97         out = templight;
  98         // the >> 16 shift adjusts down 8 bits to account for the stainmap
  99         // scaling, and remaps the 0-65536 (2x overbright) to 0-256, it will
 100         // be doubled during rendering to achieve 2x overbright
 101         // (0 = 0.0, 128 = 1.0, 256 = 2.0)
 102         if (stain)
 103         {
 104                 for (i = 0;i < size;i++, bl += 3, stain += 3, out += 4)
 105                 {
 106                         l = (bl[0] * stain[0]) >> 16;out[2] = min(l, 255);
 107                         l = (bl[1] * stain[1]) >> 16;out[1] = min(l, 255);
 108                         l = (bl[2] * stain[2]) >> 16;out[0] = min(l, 255);
 109                         out[3] = 255;
 110                 }
 111         }
 112         else
 113         {
 114                 for (i = 0;i < size;i++, bl += 3, out += 4)
 115                 {
 116                         l = bl[0] >> 8;out[2] = min(l, 255);
 117                         l = bl[1] >> 8;out[1] = min(l, 255);
 118                         l = bl[2] >> 8;out[0] = min(l, 255);
 119                         out[3] = 255;
 120                 }
 121         }
 122
 123         R_UpdateTexture(surface->lightmaptexture, templight, surface->lightmapinfo->lightmaporigin[0], surface->lightmapinfo->lightmaporigin[1], 0, smax, tmax, 1);
 124
 125         // update the surface's deluxemap if it has one
 126         if (surface->deluxemaptexture != r_texture_blanknormalmap)
 127         {
 128                 vec3_t n;
 129                 unsigned char *normalmap = surface->lightmapinfo->nmapsamples;
 130                 lightmap = surface->lightmapinfo->samples;
 131                 // clear to no normalmap
 132                 bl = intblocklights;
 133                 memset(bl, 0, size3*sizeof(*bl));
 134                 // add all the normalmaps
 135                 if (lightmap && normalmap)
 136                 {
 137                         for (maps = 0;maps < MAXLIGHTMAPS && surface->lightmapinfo->styles[maps] != 255;maps++, lightmap += size3, normalmap += size3)
 138                         {
 139                                 for (scale = r_refdef.scene.lightstylevalue[surface->lightmapinfo->styles[maps]], i = 0;i < size;i++)
 140                                 {
 141                                         // add the normalmap with weighting proportional to the style's lightmap intensity
 142                                         l = (int)(VectorLength(lightmap + i*3) * scale);
 143                                         bl[i*3+0] += ((int)normalmap[i*3+0] - 128) * l;
 144                                         bl[i*3+1] += ((int)normalmap[i*3+1] - 128) * l;
 145                                         bl[i*3+2] += ((int)normalmap[i*3+2] - 128) * l;
 146                                 }
 147                         }
 148                 }
 149                 bl = intblocklights;
 150                 out = templight;
 151                 // we simply renormalize the weighted normals to get a valid deluxemap
 152                 for (i = 0;i < size;i++, bl += 3, out += 4)
 153                 {
 154                         VectorCopy(bl, n);
 155                         VectorNormalize(n);
 156                         l = (int)(n[0] * 128 + 128);out[2] = bound(0, l, 255);
 157                         l = (int)(n[1] * 128 + 128);out[1] = bound(0, l, 255);
 158                         l = (int)(n[2] * 128 + 128);out[0] = bound(0, l, 255);
 159                         out[3] = 255;
 160                 }
 161                 R_UpdateTexture(surface->deluxemaptexture, templight, surface->lightmapinfo->lightmaporigin[0], surface->lightmapinfo->lightmaporigin[1], 0, smax, tmax, 1);
 162         }
 163 }
 164
 165 void R_StainNode (mnode_t *node, dp_model_t *model, const vec3_t origin, float radius, const float fcolor[8])
 166 {
 167         float ndist, a, ratio, maxdist, maxdist2, maxdist3, invradius, sdtable[256], td, dist2;
 168         msurface_t *surface, *endsurface;
 169         int i, s, t, smax, tmax, smax3, impacts, impactt, stained;
 170         unsigned char *bl;
 171         vec3_t impact;
 172
 173         maxdist = radius * radius;
 174         invradius = 1.0f / radius;
 175
 176 loc0:
 177         if (!node->plane)
 178                 return;
 179         ndist = PlaneDiff(origin, node->plane);
 180         if (ndist > radius)
 181         {
 182                 node = node->children[0];
 183                 goto loc0;
 184         }
 185         if (ndist < -radius)
 186         {
 187                 node = node->children[1];
 188                 goto loc0;
 189         }
 190
 191         dist2 = ndist * ndist;
 192         maxdist3 = maxdist - dist2;
 193
 194         if (node->plane->type < 3)
 195         {
 196                 VectorCopy(origin, impact);
 197                 impact[node->plane->type] -= ndist;
 198         }
 199         else
 200         {
 201                 impact[0] = origin[0] - node->plane->normal[0] * ndist;
 202                 impact[1] = origin[1] - node->plane->normal[1] * ndist;
 203                 impact[2] = origin[2] - node->plane->normal[2] * ndist;
 204         }
 205
 206         for (surface = model->data_surfaces + node->firstsurface, endsurface = surface + node->numsurfaces;surface < endsurface;surface++)
 207         {
 208                 if (surface->lightmapinfo->stainsamples)
 209                 {
 210                         smax = (surface->lightmapinfo->extents[0] >> 4) + 1;
 211                         tmax = (surface->lightmapinfo->extents[1] >> 4) + 1;
 212
 213                         impacts = (int)(DotProduct (impact, surface->lightmapinfo->texinfo->vecs[0]) + surface->lightmapinfo->texinfo->vecs[0][3] - surface->lightmapinfo->texturemins[0]);
 214                         impactt = (int)(DotProduct (impact, surface->lightmapinfo->texinfo->vecs[1]) + surface->lightmapinfo->texinfo->vecs[1][3] - surface->lightmapinfo->texturemins[1]);
 215
 216                         s = bound(0, impacts, smax * 16) - impacts;
 217                         t = bound(0, impactt, tmax * 16) - impactt;
 218                         i = (int)(s * s + t * t + dist2);
 219                         if ((i > maxdist) || (smax > (int)(sizeof(sdtable)/sizeof(sdtable[0])))) // smax overflow fix from Andreas Dehmel
 220                                 continue;
 221
 222                         // reduce calculations
 223                         for (s = 0, i = impacts; s < smax; s++, i -= 16)
 224                                 sdtable[s] = i * i + dist2;
 225
 226                         bl = surface->lightmapinfo->stainsamples;
 227                         smax3 = smax * 3;
 228                         stained = false;
 229
 230                         i = impactt;
 231                         for (t = 0;t < tmax;t++, i -= 16)
 232                         {
 233                                 td = i * i;
 234                                 // make sure some part of it is visible on this line
 235                                 if (td < maxdist3)
 236                                 {
 237                                         maxdist2 = maxdist - td;
 238                                         for (s = 0;s < smax;s++)
 239                                         {
 240                                                 if (sdtable[s] < maxdist2)
 241                                                 {
 242                                                         ratio = lhrandom(0.0f, 1.0f);
 243                                                         a = (fcolor[3] + ratio * fcolor[7]) * (1.0f - sqrt(sdtable[s] + td) * invradius);
 244                                                         if (a >= (1.0f / 64.0f))
 245                                                         {
 246                                                                 if (a > 1)
 247                                                                         a = 1;
 248                                                                 bl[0] = (unsigned char) ((float) bl[0] + a * ((fcolor[0] + ratio * fcolor[4]) - (float) bl[0]));
 249                                                                 bl[1] = (unsigned char) ((float) bl[1] + a * ((fcolor[1] + ratio * fcolor[5]) - (float) bl[1]));
 250                                                                 bl[2] = (unsigned char) ((float) bl[2] + a * ((fcolor[2] + ratio * fcolor[6]) - (float) bl[2]));
 251                                                                 stained = true;
 252                                                         }
 253                                                 }
 254                                                 bl += 3;
 255                                         }
 256                                 }
 257                                 else // skip line
 258                                         bl += smax3;
 259                         }
 260                         // force lightmap upload
 261                         if (stained)
 262                                 model->brushq1.lightmapupdateflags[surface - model->data_surfaces] = true;
 263                 }
 264         }
 265
 266         if (node->children[0]->plane)
 267         {
 268                 if (node->children[1]->plane)
 269                 {
 270                         R_StainNode(node->children[0], model, origin, radius, fcolor);
 271                         node = node->children[1];
 272                         goto loc0;
 273                 }
 274                 else
 275                 {
 276                         node = node->children[0];
 277                         goto loc0;
 278                 }
 279         }
 280         else if (node->children[1]->plane)
 281         {
 282                 node = node->children[1];
 283                 goto loc0;
 284         }
 285 }
 286
 287 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)
 288 {
 289         int n;
 290         float fcolor[8];
 291         entity_render_t *ent;
 292         dp_model_t *model;
 293         vec3_t org;
 294         if (r_refdef.scene.worldmodel == NULL || !r_refdef.scene.worldmodel->brush.data_nodes || !r_refdef.scene.worldmodel->brushq1.lightdata)
 295                 return;
 296         fcolor[0] = cr1;
 297         fcolor[1] = cg1;
 298         fcolor[2] = cb1;
 299         fcolor[3] = ca1 * (1.0f / 64.0f);
 300         fcolor[4] = cr2 - cr1;
 301         fcolor[5] = cg2 - cg1;
 302         fcolor[6] = cb2 - cb1;
 303         fcolor[7] = (ca2 - ca1) * (1.0f / 64.0f);
 304
 305         R_StainNode(r_refdef.scene.worldmodel->brush.data_nodes + r_refdef.scene.worldmodel->brushq1.hulls[0].firstclipnode, r_refdef.scene.worldmodel, origin, radius, fcolor);
 306
 307         // look for embedded bmodels
 308         for (n = 0;n < cl.num_brushmodel_entities;n++)
 309         {
 310                 ent = &cl.entities[cl.brushmodel_entities[n]].render;
 311                 model = ent->model;
 312                 if (model && model->name[0] == '*')
 313                 {
 314                         if (model->brush.data_nodes)
 315                         {
 316                                 Matrix4x4_Transform(&ent->inversematrix, origin, org);
 317                                 R_StainNode(model->brush.data_nodes + model->brushq1.hulls[0].firstclipnode, model, org, radius, fcolor);
 318                         }
 319                 }
 320         }
 321 }
 322
 323
 324 /*
 325 =============================================================
 326
 327         BRUSH MODELS
 328
 329 =============================================================
 330 */
 331
 332 static void R_DrawPortal_Callback(const entity_render_t *ent, const rtlight_t *rtlight, int numsurfaces, int *surfacelist)
 333 {
 334         // due to the hacky nature of this function's parameters, this is never
 335         // called with a batch, so numsurfaces is always 1, and the surfacelist
 336         // contains only a leaf number for coloring purposes
 337         const mportal_t *portal = (mportal_t *)ent;
 338         qboolean isvis;
 339         int i, numpoints;
 340         float *v;
 341         float vertex3f[POLYGONELEMENTS_MAXPOINTS*3];
 342         CHECKGLERROR
 343         GL_BlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
 344         GL_DepthMask(false);
 345         GL_DepthRange(0, 1);
 346         GL_PolygonOffset(r_refdef.polygonfactor, r_refdef.polygonoffset);
 347         GL_DepthTest(true);
 348         GL_CullFace(GL_NONE);
 349         R_EntityMatrix(&identitymatrix);
 350
 351         numpoints = min(portal->numpoints, POLYGONELEMENTS_MAXPOINTS);
 352
 353 //      R_Mesh_ResetTextureState();
 354
 355         isvis = (portal->here->clusterindex >= 0 && portal->past->clusterindex >= 0 && portal->here->clusterindex != portal->past->clusterindex);
 356
 357         i = surfacelist[0] >> 1;
 358         GL_Color(((i & 0x0007) >> 0) * (1.0f / 7.0f) * r_refdef.view.colorscale,
 359                          ((i & 0x0038) >> 3) * (1.0f / 7.0f) * r_refdef.view.colorscale,
 360                          ((i & 0x01C0) >> 6) * (1.0f / 7.0f) * r_refdef.view.colorscale,
 361                          isvis ? 0.125f : 0.03125f);
 362         for (i = 0, v = vertex3f;i < numpoints;i++, v += 3)
 363                 VectorCopy(portal->points[i].position, v);
 364         R_Mesh_PrepareVertices_Generic_Arrays(numpoints, vertex3f, NULL, NULL);
 365         R_SetupShader_Generic(NULL, NULL, GL_MODULATE, 1, false);
 366         R_Mesh_Draw(0, numpoints, 0, numpoints - 2, polygonelement3i, NULL, 0, polygonelement3s, NULL, 0);
 367 }
 368
 369 // LordHavoc: this is just a nice debugging tool, very slow
 370 void R_DrawPortals(void)
 371 {
 372         int i, leafnum;
 373         mportal_t *portal;
 374         float center[3], f;
 375         dp_model_t *model = r_refdef.scene.worldmodel;
 376         if (model == NULL)
 377                 return;
 378         for (leafnum = 0;leafnum < r_refdef.scene.worldmodel->brush.num_leafs;leafnum++)
 379         {
 380                 if (r_refdef.viewcache.world_leafvisible[leafnum])
 381                 {
 382                         //for (portalnum = 0, portal = model->brush.data_portals;portalnum < model->brush.num_portals;portalnum++, portal++)
 383                         for (portal = r_refdef.scene.worldmodel->brush.data_leafs[leafnum].portals;portal;portal = portal->next)
 384                         {
 385                                 if (portal->numpoints <= POLYGONELEMENTS_MAXPOINTS)
 386                                 if (!R_CullBox(portal->mins, portal->maxs))
 387                                 {
 388                                         VectorClear(center);
 389                                         for (i = 0;i < portal->numpoints;i++)
 390                                                 VectorAdd(center, portal->points[i].position, center);
 391                                         f = ixtable[portal->numpoints];
 392                                         VectorScale(center, f, center);
 393                                         R_MeshQueue_AddTransparent(center, R_DrawPortal_Callback, (entity_render_t *)portal, leafnum, rsurface.rtlight);
 394                                 }
 395                         }
 396                 }
 397         }
 398 }
 399
 400 void R_View_WorldVisibility(qboolean forcenovis)
 401 {
 402         int i, j, *mark;
 403         mleaf_t *leaf;
 404         mleaf_t *viewleaf;
 405         dp_model_t *model = r_refdef.scene.worldmodel;
 406
 407         if (!model)
 408                 return;
 409
 410         if (r_refdef.view.usecustompvs)
 411         {
 412                 // clear the visible surface and leaf flags arrays
 413                 memset(r_refdef.viewcache.world_surfacevisible, 0, model->num_surfaces);
 414                 memset(r_refdef.viewcache.world_leafvisible, 0, model->brush.num_leafs);
 415                 r_refdef.viewcache.world_novis = false;
 416
 417                 // simply cull each marked leaf to the frustum (view pyramid)
 418                 for (j = 0, leaf = model->brush.data_leafs;j < model->brush.num_leafs;j++, leaf++)
 419                 {
 420                         // if leaf is in current pvs and on the screen, mark its surfaces
 421                         if (CHECKPVSBIT(r_refdef.viewcache.world_pvsbits, leaf->clusterindex) && !R_CullBox(leaf->mins, leaf->maxs))
 422                         {
 423                                 r_refdef.stats.world_leafs++;
 424                                 r_refdef.viewcache.world_leafvisible[j] = true;
 425                                 if (leaf->numleafsurfaces)
 426                                         for (i = 0, mark = leaf->firstleafsurface;i < leaf->numleafsurfaces;i++, mark++)
 427                                                 r_refdef.viewcache.world_surfacevisible[*mark] = true;
 428                         }
 429                 }
 430                 return;
 431         }
 432
 433         // if possible find the leaf the view origin is in
 434         viewleaf = model->brush.PointInLeaf ? model->brush.PointInLeaf(model, r_refdef.view.origin) : NULL;
 435         // if possible fetch the visible cluster bits
 436         if (!r_lockpvs.integer && model->brush.FatPVS)
 437                 model->brush.FatPVS(model, r_refdef.view.origin, 2, r_refdef.viewcache.world_pvsbits, (r_refdef.viewcache.world_numclusters+7)>>3, false);
 438
 439         if (!r_lockvisibility.integer)
 440         {
 441                 // clear the visible surface and leaf flags arrays
 442                 memset(r_refdef.viewcache.world_surfacevisible, 0, model->num_surfaces);
 443                 memset(r_refdef.viewcache.world_leafvisible, 0, model->brush.num_leafs);
 444
 445                 r_refdef.viewcache.world_novis = false;
 446
 447                 // if floating around in the void (no pvs data available, and no
 448                 // portals available), simply use all on-screen leafs.
 449                 if (!viewleaf || viewleaf->clusterindex < 0 || forcenovis || r_trippy.integer)
 450                 {
 451                         // no visibility method: (used when floating around in the void)
 452                         // simply cull each leaf to the frustum (view pyramid)
 453                         // similar to quake's RecursiveWorldNode but without cache misses
 454                         r_refdef.viewcache.world_novis = true;
 455                         for (j = 0, leaf = model->brush.data_leafs;j < model->brush.num_leafs;j++, leaf++)
 456                         {
 457                                 if (leaf->clusterindex < 0)
 458                                         continue;
 459                                 // if leaf is in current pvs and on the screen, mark its surfaces
 460                                 if (!R_CullBox(leaf->mins, leaf->maxs))
 461                                 {
 462                                         r_refdef.stats.world_leafs++;
 463                                         r_refdef.viewcache.world_leafvisible[j] = true;
 464                                         if (leaf->numleafsurfaces)
 465                                                 for (i = 0, mark = leaf->firstleafsurface;i < leaf->numleafsurfaces;i++, mark++)
 466                                                         r_refdef.viewcache.world_surfacevisible[*mark] = true;
 467                                 }
 468                         }
 469                 }
 470                 // just check if each leaf in the PVS is on screen
 471                 // (unless portal culling is enabled)
 472                 else if (!model->brush.data_portals || r_useportalculling.integer < 1 || (r_useportalculling.integer < 2 && !r_novis.integer))
 473                 {
 474                         // pvs method:
 475                         // simply check if each leaf is in the Potentially Visible Set,
 476                         // and cull to frustum (view pyramid)
 477                         // similar to quake's RecursiveWorldNode but without cache misses
 478                         for (j = 0, leaf = model->brush.data_leafs;j < model->brush.num_leafs;j++, leaf++)
 479                         {
 480                                 if (leaf->clusterindex < 0)
 481                                         continue;
 482                                 // if leaf is in current pvs and on the screen, mark its surfaces
 483                                 if (CHECKPVSBIT(r_refdef.viewcache.world_pvsbits, leaf->clusterindex) && !R_CullBox(leaf->mins, leaf->maxs))
 484                                 {
 485                                         r_refdef.stats.world_leafs++;
 486                                         r_refdef.viewcache.world_leafvisible[j] = true;
 487                                         if (leaf->numleafsurfaces)
 488                                                 for (i = 0, mark = leaf->firstleafsurface;i < leaf->numleafsurfaces;i++, mark++)
 489                                                         r_refdef.viewcache.world_surfacevisible[*mark] = true;
 490                                 }
 491                         }
 492                 }
 493                 // if desired use a recursive portal flow, culling each portal to
 494                 // frustum and checking if the leaf the portal leads to is in the pvs
 495                 else
 496                 {
 497                         int leafstackpos;
 498                         mportal_t *p;
 499                         mleaf_t *leafstack[8192];
 500                         // simple-frustum portal method:
 501                         // follows portals leading outward from viewleaf, does not venture
 502                         // offscreen or into leafs that are not visible, faster than
 503                         // Quake's RecursiveWorldNode and vastly better in unvised maps,
 504                         // often culls some surfaces that pvs alone would miss
 505                         // (such as a room in pvs that is hidden behind a wall, but the
 506                         //  passage leading to the room is off-screen)
 507                         leafstack[0] = viewleaf;
 508                         leafstackpos = 1;
 509                         while (leafstackpos)
 510                         {
 511                                 leaf = leafstack[--leafstackpos];
 512                                 if (r_refdef.viewcache.world_leafvisible[leaf - model->brush.data_leafs])
 513                                         continue;
 514                                 if (leaf->clusterindex < 0)
 515                                         continue;
 516                                 r_refdef.stats.world_leafs++;
 517                                 r_refdef.viewcache.world_leafvisible[leaf - model->brush.data_leafs] = true;
 518                                 // mark any surfaces bounding this leaf
 519                                 if (leaf->numleafsurfaces)
 520                                         for (i = 0, mark = leaf->firstleafsurface;i < leaf->numleafsurfaces;i++, mark++)
 521                                                 r_refdef.viewcache.world_surfacevisible[*mark] = true;
 522                                 // follow portals into other leafs
 523                                 // the checks are:
 524                                 // if viewer is behind portal (portal faces outward into the scene)
 525                                 // and the portal polygon's bounding box is on the screen
 526                                 // and the leaf has not been visited yet
 527                                 // and the leaf is visible in the pvs
 528                                 // (the first two checks won't cause as many cache misses as the leaf checks)
 529                                 for (p = leaf->portals;p;p = p->next)
 530                                 {
 531                                         r_refdef.stats.world_portals++;
 532                                         if (DotProduct(r_refdef.view.origin, p->plane.normal) < (p->plane.dist + 1)
 533                                          && !r_refdef.viewcache.world_leafvisible[p->past - model->brush.data_leafs]
 534                                          && CHECKPVSBIT(r_refdef.viewcache.world_pvsbits, p->past->clusterindex)
 535                                          && !R_CullBox(p->mins, p->maxs)
 536                                          && leafstackpos < (int)(sizeof(leafstack) / sizeof(leafstack[0])))
 537                                                 leafstack[leafstackpos++] = p->past;
 538                                 }
 539                         }
 540                 }
 541         }
 542
 543         if (r_usesurfaceculling.integer)
 544         {
 545                 int k = model->firstmodelsurface;
 546                 int l = k + model->nummodelsurfaces;
 547                 unsigned char *visible = r_refdef.viewcache.world_surfacevisible;
 548                 msurface_t *surfaces = model->data_surfaces;
 549                 msurface_t *surface;
 550                 for (;k < l;k++)
 551                 {
 552                         if (visible[k])
 553                         {
 554                                 surface = surfaces + k;
 555                                 if (R_CullBox(surface->mins, surface->maxs))
 556                                         visible[k] = false;
 557                         }
 558                 }
 559 }
 560 }
 561
 562 void R_Q1BSP_DrawSky(entity_render_t *ent)
 563 {
 564         if (ent->model == NULL)
 565                 return;
 566         if (ent == r_refdef.scene.worldentity)
 567                 R_DrawWorldSurfaces(true, true, false, false, false);
 568         else
 569                 R_DrawModelSurfaces(ent, true, true, false, false, false);
 570 }
 571
 572 extern void R_Water_AddWaterPlane(msurface_t *surface, int entno);
 573 void R_Q1BSP_DrawAddWaterPlanes(entity_render_t *ent)
 574 {
 575         int i, j, n, flagsmask;
 576         dp_model_t *model = ent->model;
 577         msurface_t *surfaces;
 578         if (model == NULL)
 579                 return;
 580
 581         if (ent == r_refdef.scene.worldentity)
 582                 RSurf_ActiveWorldEntity();
 583         else
 584                 RSurf_ActiveModelEntity(ent, false, false, false);
 585
 586         surfaces = model->data_surfaces;
 587         flagsmask = MATERIALFLAG_WATERSHADER | MATERIALFLAG_REFRACTION | MATERIALFLAG_REFLECTION | MATERIALFLAG_CAMERA;
 588
 589         // add visible surfaces to draw list
 590         if (ent == r_refdef.scene.worldentity)
 591         {
 592                 for (i = 0;i < model->nummodelsurfaces;i++)
 593                 {
 594                         j = model->sortedmodelsurfaces[i];
 595                         if (r_refdef.viewcache.world_surfacevisible[j])
 596                                 if (surfaces[j].texture->basematerialflags & flagsmask)
 597                                         R_Water_AddWaterPlane(surfaces + j, 0);
 598                 }
 599         }
 600         else
 601         {
 602                 if(ent->entitynumber >= MAX_EDICTS) // && CL_VM_TransformView(ent->entitynumber - MAX_EDICTS, NULL, NULL, NULL))
 603                         n = ent->entitynumber;
 604                 else
 605                         n = 0;
 606                 for (i = 0;i < model->nummodelsurfaces;i++)
 607                 {
 608                         j = model->sortedmodelsurfaces[i];
 609                         if (surfaces[j].texture->basematerialflags & flagsmask)
 610                                 R_Water_AddWaterPlane(surfaces + j, n);
 611                 }
 612         }
 613         rsurface.entity = NULL; // used only by R_GetCurrentTexture and RSurf_ActiveWorldEntity/RSurf_ActiveModelEntity
 614 }
 615
 616 void R_Q1BSP_Draw(entity_render_t *ent)
 617 {
 618         dp_model_t *model = ent->model;
 619         if (model == NULL)
 620                 return;
 621         if (ent == r_refdef.scene.worldentity)
 622                 R_DrawWorldSurfaces(false, true, false, false, false);
 623         else
 624                 R_DrawModelSurfaces(ent, false, true, false, false, false);
 625 }
 626
 627 void R_Q1BSP_DrawDepth(entity_render_t *ent)
 628 {
 629         dp_model_t *model = ent->model;
 630         if (model == NULL)
 631                 return;
 632         GL_ColorMask(0,0,0,0);
 633         GL_Color(1,1,1,1);
 634         GL_DepthTest(true);
 635         GL_BlendFunc(GL_ONE, GL_ZERO);
 636         GL_DepthMask(true);
 637 //      R_Mesh_ResetTextureState();
 638         R_SetupShader_DepthOrShadow(false);
 639         if (ent == r_refdef.scene.worldentity)
 640                 R_DrawWorldSurfaces(false, false, true, false, false);
 641         else
 642                 R_DrawModelSurfaces(ent, false, false, true, false, false);
 643         GL_ColorMask(r_refdef.view.colormask[0], r_refdef.view.colormask[1], r_refdef.view.colormask[2], 1);
 644 }
 645
 646 void R_Q1BSP_DrawDebug(entity_render_t *ent)
 647 {
 648         if (ent->model == NULL)
 649                 return;
 650         if (ent == r_refdef.scene.worldentity)
 651                 R_DrawWorldSurfaces(false, false, false, true, false);
 652         else
 653                 R_DrawModelSurfaces(ent, false, false, false, true, false);
 654 }
 655
 656 void R_Q1BSP_DrawPrepass(entity_render_t *ent)
 657 {
 658         dp_model_t *model = ent->model;
 659         if (model == NULL)
 660                 return;
 661         if (ent == r_refdef.scene.worldentity)
 662                 R_DrawWorldSurfaces(false, true, false, false, true);
 663         else
 664                 R_DrawModelSurfaces(ent, false, true, false, false, true);
 665 }
 666
 667 typedef struct r_q1bsp_getlightinfo_s
 668 {
 669         dp_model_t *model;
 670         vec3_t relativelightorigin;
 671         float lightradius;
 672         int *outleaflist;
 673         unsigned char *outleafpvs;
 674         int outnumleafs;
 675         unsigned char *visitingleafpvs;
 676         int *outsurfacelist;
 677         unsigned char *outsurfacepvs;
 678         unsigned char *tempsurfacepvs;
 679         unsigned char *outshadowtrispvs;
 680         unsigned char *outlighttrispvs;
 681         int outnumsurfaces;
 682         vec3_t outmins;
 683         vec3_t outmaxs;
 684         vec3_t lightmins;
 685         vec3_t lightmaxs;
 686         const unsigned char *pvs;
 687         qboolean svbsp_active;
 688         qboolean svbsp_insertoccluder;
 689         int numfrustumplanes;
 690         const mplane_t *frustumplanes;
 691 }
 692 r_q1bsp_getlightinfo_t;
 693
 694 #define GETLIGHTINFO_MAXNODESTACK 4096
 695
 696 static void R_Q1BSP_RecursiveGetLightInfo_BSP(r_q1bsp_getlightinfo_t *info, qboolean skipsurfaces)
 697 {
 698         // nodestack
 699         mnode_t *nodestack[GETLIGHTINFO_MAXNODESTACK];
 700         int nodestackpos = 0;
 701         // node processing
 702         mplane_t *plane;
 703         mnode_t *node;
 704         int sides;
 705         // leaf processing
 706         mleaf_t *leaf;
 707         const msurface_t *surface;
 708         const msurface_t *surfaces = info->model->data_surfaces;
 709         int numleafsurfaces;
 710         int leafsurfaceindex;
 711         int surfaceindex;
 712         int triangleindex, t;
 713         int currentmaterialflags;
 714         qboolean castshadow;
 715         const int *e;
 716         const vec_t *v[3];
 717         float v2[3][3];
 718         qboolean insidebox;
 719         qboolean frontsidecasting = r_shadow_frontsidecasting.integer != 0;
 720         qboolean svbspactive = info->svbsp_active;
 721         qboolean svbspinsertoccluder = info->svbsp_insertoccluder;
 722         const int *leafsurfaceindices;
 723         qboolean addedtris;
 724         int i;
 725         mportal_t *portal;
 726         static float points[128][3];
 727         // push the root node onto our nodestack
 728         nodestack[nodestackpos++] = info->model->brush.data_nodes;
 729         // we'll be done when the nodestack is empty
 730         while (nodestackpos)
 731         {
 732                 // get a node from the stack to process
 733                 node = nodestack[--nodestackpos];
 734                 // is it a node or a leaf?
 735                 plane = node->plane;
 736                 if (plane)
 737                 {
 738                         // node
 739 #if 0
 740                         if (!BoxesOverlap(info->lightmins, info->lightmaxs, node->mins, node->maxs))
 741                                 continue;
 742 #endif
 743 #if 0
 744                         if (!r_shadow_compilingrtlight && R_CullBoxCustomPlanes(node->mins, node->maxs, rtlight->cached_numfrustumplanes, rtlight->cached_frustumplanes))
 745                                 continue;
 746 #endif
 747                         // axial planes can be processed much more quickly
 748                         if (plane->type < 3)
 749                         {
 750                                 // axial plane
 751                                 if (info->lightmins[plane->type] > plane->dist)
 752                                         nodestack[nodestackpos++] = node->children[0];
 753                                 else if (info->lightmaxs[plane->type] < plane->dist)
 754                                         nodestack[nodestackpos++] = node->children[1];
 755                                 else
 756                                 {
 757                                         // recurse front side first because the svbsp building prefers it
 758                                         if (info->relativelightorigin[plane->type] >= plane->dist)
 759                                         {
 760                                                 if (nodestackpos < GETLIGHTINFO_MAXNODESTACK)
 761                                                         nodestack[nodestackpos++] = node->children[0];
 762                                                 nodestack[nodestackpos++] = node->children[1];
 763                                         }
 764                                         else
 765                                         {
 766                                                 if (nodestackpos < GETLIGHTINFO_MAXNODESTACK)
 767                                                         nodestack[nodestackpos++] = node->children[1];
 768                                                 nodestack[nodestackpos++] = node->children[0];
 769                                         }
 770                                 }
 771                         }
 772                         else
 773                         {
 774                                 // sloped plane
 775                                 sides = BoxOnPlaneSide(info->lightmins, info->lightmaxs, plane);
 776                                 switch (sides)
 777                                 {
 778                                 default:
 779                                         continue; // ERROR: NAN bounding box!
 780                                 case 1:
 781                                         nodestack[nodestackpos++] = node->children[0];
 782                                         break;
 783                                 case 2:
 784                                         nodestack[nodestackpos++] = node->children[1];
 785                                         break;
 786                                 case 3:
 787                                         // recurse front side first because the svbsp building prefers it
 788                                         if (PlaneDist(info->relativelightorigin, plane) >= 0)
 789                                         {
 790                                                 if (nodestackpos < GETLIGHTINFO_MAXNODESTACK)
 791                                                         nodestack[nodestackpos++] = node->children[0];
 792                                                 nodestack[nodestackpos++] = node->children[1];
 793                                         }
 794                                         else
 795                                         {
 796                                                 if (nodestackpos < GETLIGHTINFO_MAXNODESTACK)
 797                                                         nodestack[nodestackpos++] = node->children[1];
 798                                                 nodestack[nodestackpos++] = node->children[0];
 799                                         }
 800                                         break;
 801                                 }
 802                         }
 803                 }
 804                 else
 805                 {
 806                         // leaf
 807                         leaf = (mleaf_t *)node;
 808 #if 1
 809                         if (r_shadow_frontsidecasting.integer && info->pvs != NULL && !CHECKPVSBIT(info->pvs, leaf->clusterindex))
 810                                 continue;
 811 #endif
 812 #if 1
 813                         if (!BoxesOverlap(info->lightmins, info->lightmaxs, leaf->mins, leaf->maxs))
 814                                 continue;
 815 #endif
 816 #if 1
 817                         if (!r_shadow_compilingrtlight && R_CullBoxCustomPlanes(leaf->mins, leaf->maxs, info->numfrustumplanes, info->frustumplanes))
 818                                 continue;
 819 #endif
 820
 821                         if (svbspactive)
 822                         {
 823                                 // we can occlusion test the leaf by checking if all of its portals
 824                                 // are occluded (unless the light is in this leaf - but that was
 825                                 // already handled by the caller)
 826                                 for (portal = leaf->portals;portal;portal = portal->next)
 827                                 {
 828                                         for (i = 0;i < portal->numpoints;i++)
 829                                                 VectorCopy(portal->points[i].position, points[i]);
 830                                         if (SVBSP_AddPolygon(&r_svbsp, portal->numpoints, points[0], false, NULL, NULL, 0) & 2)
 831                                                 break;
 832                                 }
 833                                 if (leaf->portals && portal == NULL)
 834                                         continue; // no portals of this leaf visible
 835                         }
 836
 837                         // add this leaf to the reduced light bounds
 838                         info->outmins[0] = min(info->outmins[0], leaf->mins[0]);
 839                         info->outmins[1] = min(info->outmins[1], leaf->mins[1]);
 840                         info->outmins[2] = min(info->outmins[2], leaf->mins[2]);
 841                         info->outmaxs[0] = max(info->outmaxs[0], leaf->maxs[0]);
 842                         info->outmaxs[1] = max(info->outmaxs[1], leaf->maxs[1]);
 843                         info->outmaxs[2] = max(info->outmaxs[2], leaf->maxs[2]);
 844
 845                         // mark this leaf as being visible to the light
 846                         if (info->outleafpvs)
 847                         {
 848                                 int leafindex = leaf - info->model->brush.data_leafs;
 849                                 if (!CHECKPVSBIT(info->outleafpvs, leafindex))
 850                                 {
 851                                         SETPVSBIT(info->outleafpvs, leafindex);
 852                                         info->outleaflist[info->outnumleafs++] = leafindex;
 853                                 }
 854                         }
 855
 856                         // when using BIH, we skip the surfaces here
 857                         if (skipsurfaces)
 858                                 continue;
 859
 860                         // iterate the surfaces linked by this leaf and check their triangles
 861                         leafsurfaceindices = leaf->firstleafsurface;
 862                         numleafsurfaces = leaf->numleafsurfaces;
 863                         if (svbspinsertoccluder)
 864                         {
 865                                 for (leafsurfaceindex = 0;leafsurfaceindex < numleafsurfaces;leafsurfaceindex++)
 866                                 {
 867                                         surfaceindex = leafsurfaceindices[leafsurfaceindex];
 868                                         if (CHECKPVSBIT(info->outsurfacepvs, surfaceindex))
 869                                                 continue;
 870                                         SETPVSBIT(info->outsurfacepvs, surfaceindex);
 871                                         surface = surfaces + surfaceindex;
 872                                         if (!BoxesOverlap(info->lightmins, info->lightmaxs, surface->mins, surface->maxs))
 873                                                 continue;
 874                                         currentmaterialflags = R_GetCurrentTexture(surface->texture)->currentmaterialflags;
 875                                         castshadow = !(currentmaterialflags & MATERIALFLAG_NOSHADOW);
 876                                         if (!castshadow)
 877                                                 continue;
 878                                         insidebox = BoxInsideBox(surface->mins, surface->maxs, info->lightmins, info->lightmaxs);
 879                                         for (triangleindex = 0, t = surface->num_firstshadowmeshtriangle, e = info->model->brush.shadowmesh->element3i + t * 3;triangleindex < surface->num_triangles;triangleindex++, t++, e += 3)
 880                                         {
 881                                                 v[0] = info->model->brush.shadowmesh->vertex3f + e[0] * 3;
 882                                                 v[1] = info->model->brush.shadowmesh->vertex3f + e[1] * 3;
 883                                                 v[2] = info->model->brush.shadowmesh->vertex3f + e[2] * 3;
 884                                                 VectorCopy(v[0], v2[0]);
 885                                                 VectorCopy(v[1], v2[1]);
 886                                                 VectorCopy(v[2], v2[2]);
 887                                                 if (insidebox || TriangleOverlapsBox(v2[0], v2[1], v2[2], info->lightmins, info->lightmaxs))
 888                                                         SVBSP_AddPolygon(&r_svbsp, 3, v2[0], true, NULL, NULL, 0);
 889                                         }
 890                                 }
 891                         }
 892                         else
 893                         {
 894                                 for (leafsurfaceindex = 0;leafsurfaceindex < numleafsurfaces;leafsurfaceindex++)
 895                                 {
 896                                         surfaceindex = leafsurfaceindices[leafsurfaceindex];
 897                                         if (CHECKPVSBIT(info->outsurfacepvs, surfaceindex))
 898                                                 continue;
 899                                         SETPVSBIT(info->outsurfacepvs, surfaceindex);
 900                                         surface = surfaces + surfaceindex;
 901                                         if (!BoxesOverlap(info->lightmins, info->lightmaxs, surface->mins, surface->maxs))
 902                                                 continue;
 903                                         addedtris = false;
 904                                         currentmaterialflags = R_GetCurrentTexture(surface->texture)->currentmaterialflags;
 905                                         castshadow = !(currentmaterialflags & MATERIALFLAG_NOSHADOW);
 906                                         insidebox = BoxInsideBox(surface->mins, surface->maxs, info->lightmins, info->lightmaxs);
 907                                         for (triangleindex = 0, t = surface->num_firstshadowmeshtriangle, e = info->model->brush.shadowmesh->element3i + t * 3;triangleindex < surface->num_triangles;triangleindex++, t++, e += 3)
 908                                         {
 909                                                 v[0] = info->model->brush.shadowmesh->vertex3f + e[0] * 3;
 910                                                 v[1] = info->model->brush.shadowmesh->vertex3f + e[1] * 3;
 911                                                 v[2] = info->model->brush.shadowmesh->vertex3f + e[2] * 3;
 912                                                 VectorCopy(v[0], v2[0]);
 913                                                 VectorCopy(v[1], v2[1]);
 914                                                 VectorCopy(v[2], v2[2]);
 915                                                 if (!insidebox && !TriangleOverlapsBox(v2[0], v2[1], v2[2], info->lightmins, info->lightmaxs))
 916                                                         continue;
 917                                                 if (svbspactive && !(SVBSP_AddPolygon(&r_svbsp, 3, v2[0], false, NULL, NULL, 0) & 2))
 918                                                         continue;
 919                                                 // we don't omit triangles from lighting even if they are
 920                                                 // backfacing, because when using shadowmapping they are often
 921                                                 // not fully occluded on the horizon of an edge
 922                                                 SETPVSBIT(info->outlighttrispvs, t);
 923                                                 addedtris = true;
 924                                                 if (castshadow)
 925                                                 {
 926                                                         if (currentmaterialflags & MATERIALFLAG_NOCULLFACE)
 927                                                         {
 928                                                                 // if the material is double sided we
 929                                                                 // can't cull by direction
 930                                                                 SETPVSBIT(info->outshadowtrispvs, t);
 931                                                         }
 932                                                         else if (frontsidecasting)
 933                                                         {
 934                                                                 // front side casting occludes backfaces,
 935                                                                 // so they are completely useless as both
 936                                                                 // casters and lit polygons
 937                                                                 if (PointInfrontOfTriangle(info->relativelightorigin, v2[0], v2[1], v2[2]))
 938                                                                         SETPVSBIT(info->outshadowtrispvs, t);
 939                                                         }
 940                                                         else
 941                                                         {
 942                                                                 // back side casting does not occlude
 943                                                                 // anything so we can't cull lit polygons
 944                                                                 if (!PointInfrontOfTriangle(info->relativelightorigin, v2[0], v2[1], v2[2]))
 945                                                                         SETPVSBIT(info->outshadowtrispvs, t);
 946                                                         }
 947                                                 }
 948                                         }
 949                                         if (addedtris)
 950                                                 info->outsurfacelist[info->outnumsurfaces++] = surfaceindex;
 951                                 }
 952                         }
 953                 }
 954         }
 955 }
 956
 957 static void R_Q1BSP_RecursiveGetLightInfo_BIH(r_q1bsp_getlightinfo_t *info, const bih_t *bih)
 958 {
 959         bih_leaf_t *leaf;
 960         bih_node_t *node;
 961         int nodenum;
 962         int axis;
 963         int surfaceindex;
 964         int t;
 965         int nodeleafindex;
 966         int currentmaterialflags;
 967         qboolean castshadow;
 968         msurface_t *surface;
 969         const int *e;
 970         const vec_t *v[3];
 971         float v2[3][3];
 972         int nodestack[GETLIGHTINFO_MAXNODESTACK];
 973         int nodestackpos = 0;
 974         // note: because the BSP leafs are not in the BIH tree, the _BSP function
 975         // must be called to mark leafs visible for entity culling...
 976         // we start at the root node
 977         nodestack[nodestackpos++] = bih->rootnode;
 978         // we'll be done when the stack is empty
 979         while (nodestackpos)
 980         {
 981                 // pop one off the stack to process
 982                 nodenum = nodestack[--nodestackpos];
 983                 // node
 984                 node = bih->nodes + nodenum;
 985                 if (node->type == BIH_UNORDERED)
 986                 {
 987                         for (nodeleafindex = 0;nodeleafindex < BIH_MAXUNORDEREDCHILDREN && node->children[nodeleafindex] >= 0;nodeleafindex++)
 988                         {
 989                                 leaf = bih->leafs + node->children[nodeleafindex];
 990                                 if (leaf->type != BIH_RENDERTRIANGLE)
 991                                         continue;
 992 #if 1
 993                                 if (!BoxesOverlap(info->lightmins, info->lightmaxs, leaf->mins, leaf->maxs))
 994                                         continue;
 995 #endif
 996 #if 1
 997                                 if (!r_shadow_compilingrtlight && R_CullBoxCustomPlanes(leaf->mins, leaf->maxs, info->numfrustumplanes, info->frustumplanes))
 998                                         continue;
 999 #endif
1000                                 surfaceindex = leaf->surfaceindex;
1001                                 surface = info->model->data_surfaces + surfaceindex;
1002                                 currentmaterialflags = R_GetCurrentTexture(surface->texture)->currentmaterialflags;
1003                                 castshadow = !(currentmaterialflags & MATERIALFLAG_NOSHADOW);
1004                                 t = leaf->itemindex + surface->num_firstshadowmeshtriangle - surface->num_firsttriangle;
1005                                 e = info->model->brush.shadowmesh->element3i + t * 3;
1006                                 v[0] = info->model->brush.shadowmesh->vertex3f + e[0] * 3;
1007                                 v[1] = info->model->brush.shadowmesh->vertex3f + e[1] * 3;
1008                                 v[2] = info->model->brush.shadowmesh->vertex3f + e[2] * 3;
1009                                 VectorCopy(v[0], v2[0]);
1010                                 VectorCopy(v[1], v2[1]);
1011                                 VectorCopy(v[2], v2[2]);
1012                                 if (info->svbsp_insertoccluder)
1013                                 {
1014                                         if (castshadow)
1015                                                 SVBSP_AddPolygon(&r_svbsp, 3, v2[0], true, NULL, NULL, 0);
1016                                         continue;
1017                                 }
1018                                 if (info->svbsp_active && !(SVBSP_AddPolygon(&r_svbsp, 3, v2[0], false, NULL, NULL, 0) & 2))
1019                                         continue;
1020                                 // we don't occlude triangles from lighting even
1021                                 // if they are backfacing, because when using
1022                                 // shadowmapping they are often not fully occluded
1023                                 // on the horizon of an edge
1024                                 SETPVSBIT(info->outlighttrispvs, t);
1025                                 if (castshadow)
1026                                 {
1027                                         if (currentmaterialflags & MATERIALFLAG_NOCULLFACE)
1028                                         {
1029                                                 // if the material is double sided we
1030                                                 // can't cull by direction
1031                                                 SETPVSBIT(info->outshadowtrispvs, t);
1032                                         }
1033                                         else if (r_shadow_frontsidecasting.integer)
1034                                         {
1035                                                 // front side casting occludes backfaces,
1036                                                 // so they are completely useless as both
1037                                                 // casters and lit polygons
1038                                                 if (PointInfrontOfTriangle(info->relativelightorigin, v2[0], v2[1], v2[2]))
1039                                                         SETPVSBIT(info->outshadowtrispvs, t);
1040                                         }
1041                                         else
1042                                         {
1043                                                 // back side casting does not occlude
1044                                                 // anything so we can't cull lit polygons
1045                                                 if (!PointInfrontOfTriangle(info->relativelightorigin, v2[0], v2[1], v2[2]))
1046                                                         SETPVSBIT(info->outshadowtrispvs, t);
1047                                         }
1048                                 }
1049                                 if (!CHECKPVSBIT(info->outsurfacepvs, surfaceindex))
1050                                 {
1051                                         SETPVSBIT(info->outsurfacepvs, surfaceindex);
1052                                         info->outsurfacelist[info->outnumsurfaces++] = surfaceindex;
1053                                 }
1054                         }
1055                 }
1056                 else
1057                 {
1058                         axis = node->type - BIH_SPLITX;
1059 #if 0
1060                         if (!BoxesOverlap(info->lightmins, info->lightmaxs, node->mins, node->maxs))
1061                                 continue;
1062 #endif
1063 #if 0
1064                         if (!r_shadow_compilingrtlight && R_CullBoxCustomPlanes(node->mins, node->maxs, rtlight->cached_numfrustumplanes, rtlight->cached_frustumplanes))
1065                                 continue;
1066 #endif
1067                         if (info->lightmins[axis] <= node->backmax)
1068                         {
1069                                 if (info->lightmaxs[axis] >= node->frontmin && nodestackpos < GETLIGHTINFO_MAXNODESTACK)
1070                                         nodestack[nodestackpos++] = node->front;
1071                                 nodestack[nodestackpos++] = node->back;
1072                                 continue;
1073                         }
1074                         else if (info->lightmaxs[axis] >= node->frontmin)
1075                         {
1076                                 nodestack[nodestackpos++] = node->front;
1077                                 continue;
1078                         }
1079                         else
1080                                 continue; // light falls between children, nothing here
1081                 }
1082         }
1083 }
1084
1085 static void R_Q1BSP_CallRecursiveGetLightInfo(r_q1bsp_getlightinfo_t *info, qboolean use_svbsp)
1086 {
1087         extern cvar_t r_shadow_usebihculling;
1088         if (use_svbsp)
1089         {
1090                 float origin[3];
1091                 VectorCopy(info->relativelightorigin, origin);
1092                 r_svbsp.maxnodes = max(r_svbsp.maxnodes, 1<<12);
1093                 r_svbsp.nodes = (svbsp_node_t*) R_FrameData_Alloc(r_svbsp.maxnodes * sizeof(svbsp_node_t));
1094                 info->svbsp_active = true;
1095                 info->svbsp_insertoccluder = true;
1096                 for (;;)
1097                 {
1098                         SVBSP_Init(&r_svbsp, origin, r_svbsp.maxnodes, r_svbsp.nodes);
1099                         R_Q1BSP_RecursiveGetLightInfo_BSP(info, false);
1100                         // if that failed, retry with more nodes
1101                         if (r_svbsp.ranoutofnodes)
1102                         {
1103                                 // an upper limit is imposed
1104                                 if (r_svbsp.maxnodes >= 2<<22)
1105                                         break;
1106                                 r_svbsp.maxnodes *= 2;
1107                                 r_svbsp.nodes = (svbsp_node_t*) R_FrameData_Alloc(r_svbsp.maxnodes * sizeof(svbsp_node_t));
1108                                 //Mem_Free(r_svbsp.nodes);
1109                                 //r_svbsp.nodes = (svbsp_node_t*) Mem_Alloc(tempmempool, r_svbsp.maxnodes * sizeof(svbsp_node_t));
1110                         }
1111                         else
1112                                 break;
1113                 }
1114                 // now clear the visibility arrays because we need to redo it
1115                 info->outnumleafs = 0;
1116                 info->outnumsurfaces = 0;
1117                 memset(info->outleafpvs, 0, (info->model->brush.num_leafs + 7) >> 3);
1118                 memset(info->outsurfacepvs, 0, (info->model->nummodelsurfaces + 7) >> 3);
1119                 if (info->model->brush.shadowmesh)
1120                         memset(info->outshadowtrispvs, 0, (info->model->brush.shadowmesh->numtriangles + 7) >> 3);
1121                 else
1122                         memset(info->outshadowtrispvs, 0, (info->model->surfmesh.num_triangles + 7) >> 3);
1123                 memset(info->outlighttrispvs, 0, (info->model->surfmesh.num_triangles + 7) >> 3);
1124         }
1125         else
1126                 info->svbsp_active = false;
1127
1128         // we HAVE to mark the leaf the light is in as lit, because portals are
1129         // irrelevant to a leaf that the light source is inside of
1130         // (and they are all facing away, too)
1131         {
1132                 mnode_t *node = info->model->brush.data_nodes;
1133                 mleaf_t *leaf;
1134                 while (node->plane)
1135                         node = node->children[(node->plane->type < 3 ? info->relativelightorigin[node->plane->type] : DotProduct(info->relativelightorigin,node->plane->normal)) < node->plane->dist];
1136                 leaf = (mleaf_t *)node;
1137                 info->outmins[0] = min(info->outmins[0], leaf->mins[0]);
1138                 info->outmins[1] = min(info->outmins[1], leaf->mins[1]);
1139                 info->outmins[2] = min(info->outmins[2], leaf->mins[2]);
1140                 info->outmaxs[0] = max(info->outmaxs[0], leaf->maxs[0]);
1141                 info->outmaxs[1] = max(info->outmaxs[1], leaf->maxs[1]);
1142                 info->outmaxs[2] = max(info->outmaxs[2], leaf->maxs[2]);
1143                 if (info->outleafpvs)
1144                 {
1145                         int leafindex = leaf - info->model->brush.data_leafs;
1146                         if (!CHECKPVSBIT(info->outleafpvs, leafindex))
1147                         {
1148                                 SETPVSBIT(info->outleafpvs, leafindex);
1149                                 info->outleaflist[info->outnumleafs++] = leafindex;
1150                         }
1151                 }
1152         }
1153
1154         info->svbsp_insertoccluder = false;
1155         // use BIH culling on single leaf maps (generally this only happens if running a model as a map), otherwise use BSP culling to make use of vis data
1156         if (r_shadow_usebihculling.integer > 0 && (r_shadow_usebihculling.integer == 2 || info->model->brush.num_leafs == 1) && info->model->render_bih.leafs != NULL)
1157         {
1158                 R_Q1BSP_RecursiveGetLightInfo_BSP(info, true);
1159                 R_Q1BSP_RecursiveGetLightInfo_BIH(info, &info->model->render_bih);
1160         }
1161         else
1162                 R_Q1BSP_RecursiveGetLightInfo_BSP(info, false);
1163         // we're using temporary framedata memory, so this pointer will be invalid soon, clear it
1164         r_svbsp.nodes = NULL;
1165         if (developer_extra.integer && use_svbsp)
1166         {
1167                 Con_DPrintf("GetLightInfo: svbsp built with %i nodes, polygon stats:\n", r_svbsp.numnodes);
1168                 Con_DPrintf("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);
1169                 Con_DPrintf("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);
1170         }
1171 }
1172
1173 static msurface_t *r_q1bsp_getlightinfo_surfaces;
1174
1175 int R_Q1BSP_GetLightInfo_comparefunc(const void *ap, const void *bp)
1176 {
1177         int a = *(int*)ap;
1178         int b = *(int*)bp;
1179         const msurface_t *as = r_q1bsp_getlightinfo_surfaces + a;
1180         const msurface_t *bs = r_q1bsp_getlightinfo_surfaces + b;
1181         if (as->texture < bs->texture)
1182                 return -1;
1183         if (as->texture > bs->texture)
1184                 return 1;
1185         return a - b;
1186 }
1187
1188 extern cvar_t r_shadow_sortsurfaces;
1189
1190 void R_Q1BSP_GetLightInfo(entity_render_t *ent, vec3_t relativelightorigin, float lightradius, vec3_t outmins, vec3_t outmaxs, int *outleaflist, unsigned char *outleafpvs, int *outnumleafspointer, int *outsurfacelist, unsigned char *outsurfacepvs, int *outnumsurfacespointer, unsigned char *outshadowtrispvs, unsigned char *outlighttrispvs, unsigned char *visitingleafpvs, int numfrustumplanes, const mplane_t *frustumplanes)
1191 {
1192         r_q1bsp_getlightinfo_t info;
1193         VectorCopy(relativelightorigin, info.relativelightorigin);
1194         info.lightradius = lightradius;
1195         info.lightmins[0] = info.relativelightorigin[0] - info.lightradius;
1196         info.lightmins[1] = info.relativelightorigin[1] - info.lightradius;
1197         info.lightmins[2] = info.relativelightorigin[2] - info.lightradius;
1198         info.lightmaxs[0] = info.relativelightorigin[0] + info.lightradius;
1199         info.lightmaxs[1] = info.relativelightorigin[1] + info.lightradius;
1200         info.lightmaxs[2] = info.relativelightorigin[2] + info.lightradius;
1201         if (ent->model == NULL)
1202         {
1203                 VectorCopy(info.lightmins, outmins);
1204                 VectorCopy(info.lightmaxs, outmaxs);
1205                 *outnumleafspointer = 0;
1206                 *outnumsurfacespointer = 0;
1207                 return;
1208         }
1209         info.model = ent->model;
1210         info.outleaflist = outleaflist;
1211         info.outleafpvs = outleafpvs;
1212         info.outnumleafs = 0;
1213         info.visitingleafpvs = visitingleafpvs;
1214         info.outsurfacelist = outsurfacelist;
1215         info.outsurfacepvs = outsurfacepvs;
1216         info.outshadowtrispvs = outshadowtrispvs;
1217         info.outlighttrispvs = outlighttrispvs;
1218         info.outnumsurfaces = 0;
1219         info.numfrustumplanes = numfrustumplanes;
1220         info.frustumplanes = frustumplanes;
1221         VectorCopy(info.relativelightorigin, info.outmins);
1222         VectorCopy(info.relativelightorigin, info.outmaxs);
1223         memset(visitingleafpvs, 0, (info.model->brush.num_leafs + 7) >> 3);
1224         memset(outleafpvs, 0, (info.model->brush.num_leafs + 7) >> 3);
1225         memset(outsurfacepvs, 0, (info.model->nummodelsurfaces + 7) >> 3);
1226         if (info.model->brush.shadowmesh)
1227                 memset(outshadowtrispvs, 0, (info.model->brush.shadowmesh->numtriangles + 7) >> 3);
1228         else
1229                 memset(outshadowtrispvs, 0, (info.model->surfmesh.num_triangles + 7) >> 3);
1230         memset(outlighttrispvs, 0, (info.model->surfmesh.num_triangles + 7) >> 3);
1231         if (info.model->brush.GetPVS && r_shadow_frontsidecasting.integer)
1232                 info.pvs = info.model->brush.GetPVS(info.model, info.relativelightorigin);
1233         else
1234                 info.pvs = NULL;
1235         RSurf_ActiveWorldEntity();
1236
1237         if (r_shadow_frontsidecasting.integer && r_shadow_compilingrtlight && r_shadow_realtime_world_compileportalculling.integer && info.model->brush.data_portals)
1238         {
1239                 // use portal recursion for exact light volume culling, and exact surface checking
1240                 Portal_Visibility(info.model, info.relativelightorigin, info.outleaflist, info.outleafpvs, &info.outnumleafs, info.outsurfacelist, info.outsurfacepvs, &info.outnumsurfaces, NULL, 0, true, info.lightmins, info.lightmaxs, info.outmins, info.outmaxs, info.outshadowtrispvs, info.outlighttrispvs, info.visitingleafpvs);
1241         }
1242         else if (r_shadow_frontsidecasting.integer && r_shadow_realtime_dlight_portalculling.integer && info.model->brush.data_portals)
1243         {
1244                 // use portal recursion for exact light volume culling, but not the expensive exact surface checking
1245                 Portal_Visibility(info.model, info.relativelightorigin, info.outleaflist, info.outleafpvs, &info.outnumleafs, info.outsurfacelist, info.outsurfacepvs, &info.outnumsurfaces, NULL, 0, r_shadow_realtime_dlight_portalculling.integer >= 2, info.lightmins, info.lightmaxs, info.outmins, info.outmaxs, info.outshadowtrispvs, info.outlighttrispvs, info.visitingleafpvs);
1246         }
1247         else
1248         {
1249                 // recurse the bsp tree, checking leafs and surfaces for visibility
1250                 // optionally using svbsp for exact culling of compiled lights
1251                 // (or if the user enables dlight svbsp culling, which is mostly for
1252                 //  debugging not actual use)
1253                 R_Q1BSP_CallRecursiveGetLightInfo(&info, (r_shadow_compilingrtlight ? r_shadow_realtime_world_compilesvbsp.integer : r_shadow_realtime_dlight_svbspculling.integer) != 0);
1254         }
1255
1256         rsurface.entity = NULL; // used only by R_GetCurrentTexture and RSurf_ActiveWorldEntity/RSurf_ActiveModelEntity
1257
1258         // limit combined leaf box to light boundaries
1259         outmins[0] = max(info.outmins[0] - 1, info.lightmins[0]);
1260         outmins[1] = max(info.outmins[1] - 1, info.lightmins[1]);
1261         outmins[2] = max(info.outmins[2] - 1, info.lightmins[2]);
1262         outmaxs[0] = min(info.outmaxs[0] + 1, info.lightmaxs[0]);
1263         outmaxs[1] = min(info.outmaxs[1] + 1, info.lightmaxs[1]);
1264         outmaxs[2] = min(info.outmaxs[2] + 1, info.lightmaxs[2]);
1265
1266         *outnumleafspointer = info.outnumleafs;
1267         *outnumsurfacespointer = info.outnumsurfaces;
1268
1269         // now sort surfaces by texture for faster rendering
1270         r_q1bsp_getlightinfo_surfaces = info.model->data_surfaces;
1271         if (r_shadow_sortsurfaces.integer)
1272                 qsort(info.outsurfacelist, info.outnumsurfaces, sizeof(*info.outsurfacelist), R_Q1BSP_GetLightInfo_comparefunc);
1273 }
1274
1275 void R_Q1BSP_CompileShadowVolume(entity_render_t *ent, vec3_t relativelightorigin, vec3_t relativelightdirection, float lightradius, int numsurfaces, const int *surfacelist)
1276 {
1277         dp_model_t *model = ent->model;
1278         msurface_t *surface;
1279         int surfacelistindex;
1280         float projectdistance = relativelightdirection ? lightradius : lightradius + model->radius*2 + r_shadow_projectdistance.value;
1281         // if triangle neighbors are disabled, shadowvolumes are disabled
1282         if (!model->brush.shadowmesh->neighbor3i)
1283                 return;
1284         r_shadow_compilingrtlight->static_meshchain_shadow_zfail = Mod_ShadowMesh_Begin(r_main_mempool, 32768, 32768, NULL, NULL, NULL, false, false, true);
1285         R_Shadow_PrepareShadowMark(model->brush.shadowmesh->numtriangles);
1286         for (surfacelistindex = 0;surfacelistindex < numsurfaces;surfacelistindex++)
1287         {
1288                 surface = model->data_surfaces + surfacelist[surfacelistindex];
1289                 if (surface->texture->basematerialflags & MATERIALFLAG_NOSHADOW)
1290                         continue;
1291                 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);
1292         }
1293         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, ent->mins, ent->maxs);
1294         r_shadow_compilingrtlight->static_meshchain_shadow_zfail = Mod_ShadowMesh_Finish(r_main_mempool, r_shadow_compilingrtlight->static_meshchain_shadow_zfail, false, false, true);
1295 }
1296
1297 extern cvar_t r_polygonoffset_submodel_factor;
1298 extern cvar_t r_polygonoffset_submodel_offset;
1299 void R_Q1BSP_DrawShadowVolume(entity_render_t *ent, const vec3_t relativelightorigin, const vec3_t relativelightdirection, float lightradius, int modelnumsurfaces, const int *modelsurfacelist, const vec3_t lightmins, const vec3_t lightmaxs)
1300 {
1301         dp_model_t *model = ent->model;
1302         const msurface_t *surface;
1303         int modelsurfacelistindex;
1304         float projectdistance = relativelightdirection ? lightradius : lightradius + model->radius*2 + r_shadow_projectdistance.value;
1305         // check the box in modelspace, it was already checked in worldspace
1306         if (!BoxesOverlap(model->normalmins, model->normalmaxs, lightmins, lightmaxs))
1307                 return;
1308         R_FrameData_SetMark();
1309         if (ent->model->brush.submodel)
1310                 GL_PolygonOffset(r_refdef.shadowpolygonfactor + r_polygonoffset_submodel_factor.value, r_refdef.shadowpolygonoffset + r_polygonoffset_submodel_offset.value);
1311         if (model->brush.shadowmesh)
1312         {
1313                 // if triangle neighbors are disabled, shadowvolumes are disabled
1314                 if (!model->brush.shadowmesh->neighbor3i)
1315                         return;
1316                 R_Shadow_PrepareShadowMark(model->brush.shadowmesh->numtriangles);
1317                 for (modelsurfacelistindex = 0;modelsurfacelistindex < modelnumsurfaces;modelsurfacelistindex++)
1318                 {
1319                         surface = model->data_surfaces + modelsurfacelist[modelsurfacelistindex];
1320                         if (R_GetCurrentTexture(surface->texture)->currentmaterialflags & MATERIALFLAG_NOSHADOW)
1321                                 continue;
1322                         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);
1323                 }
1324                 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, ent->mins, ent->maxs);
1325         }
1326         else
1327         {
1328                 // if triangle neighbors are disabled, shadowvolumes are disabled
1329                 if (!model->surfmesh.data_neighbor3i)
1330                         return;
1331                 projectdistance = lightradius + model->radius*2;
1332                 R_Shadow_PrepareShadowMark(model->surfmesh.num_triangles);
1333                 // identify lit faces within the bounding box
1334                 for (modelsurfacelistindex = 0;modelsurfacelistindex < modelnumsurfaces;modelsurfacelistindex++)
1335                 {
1336                         surface = model->data_surfaces + modelsurfacelist[modelsurfacelistindex];
1337                         rsurface.texture = R_GetCurrentTexture(surface->texture);
1338                         if (rsurface.texture->currentmaterialflags & MATERIALFLAG_NOSHADOW)
1339                                 continue;
1340                         R_Shadow_MarkVolumeFromBox(surface->num_firsttriangle, surface->num_triangles, rsurface.modelvertex3f, rsurface.modelelement3i, relativelightorigin, relativelightdirection, lightmins, lightmaxs, surface->mins, surface->maxs);
1341                 }
1342                 R_Shadow_VolumeFromList(model->surfmesh.num_vertices, model->surfmesh.num_triangles, rsurface.modelvertex3f, model->surfmesh.data_element3i, model->surfmesh.data_neighbor3i, relativelightorigin, relativelightdirection, projectdistance, numshadowmark, shadowmarklist, ent->mins, ent->maxs);
1343         }
1344         if (ent->model->brush.submodel)
1345                 GL_PolygonOffset(r_refdef.shadowpolygonfactor, r_refdef.shadowpolygonoffset);
1346         R_FrameData_ReturnToMark();
1347 }
1348
1349 void R_Q1BSP_CompileShadowMap(entity_render_t *ent, vec3_t relativelightorigin, vec3_t relativelightdirection, float lightradius, int numsurfaces, const int *surfacelist)
1350 {
1351         dp_model_t *model = ent->model;
1352         msurface_t *surface;
1353         int surfacelistindex;
1354         int sidetotals[6] = { 0, 0, 0, 0, 0, 0 }, sidemasks = 0;
1355         int i;
1356         r_shadow_compilingrtlight->static_meshchain_shadow_shadowmap = Mod_ShadowMesh_Begin(r_main_mempool, 32768, 32768, NULL, NULL, NULL, false, false, true);
1357         R_Shadow_PrepareShadowSides(model->brush.shadowmesh->numtriangles);
1358         for (surfacelistindex = 0;surfacelistindex < numsurfaces;surfacelistindex++)
1359         {
1360                 surface = model->data_surfaces + surfacelist[surfacelistindex];
1361                 sidemasks |= R_Shadow_ChooseSidesFromBox(surface->num_firstshadowmeshtriangle, surface->num_triangles, model->brush.shadowmesh->vertex3f, model->brush.shadowmesh->element3i, &r_shadow_compilingrtlight->matrix_worldtolight, relativelightorigin, relativelightdirection, r_shadow_compilingrtlight->cullmins, r_shadow_compilingrtlight->cullmaxs, surface->mins, surface->maxs, surface->texture->basematerialflags & MATERIALFLAG_NOSHADOW ? NULL : sidetotals);
1362         }
1363         R_Shadow_ShadowMapFromList(model->brush.shadowmesh->numverts, model->brush.shadowmesh->numtriangles, model->brush.shadowmesh->vertex3f, model->brush.shadowmesh->element3i, numshadowsides, sidetotals, shadowsides, shadowsideslist);
1364         r_shadow_compilingrtlight->static_meshchain_shadow_shadowmap = Mod_ShadowMesh_Finish(r_main_mempool, r_shadow_compilingrtlight->static_meshchain_shadow_shadowmap, false, false, true);
1365         r_shadow_compilingrtlight->static_shadowmap_receivers &= sidemasks;
1366         for(i = 0;i<6;i++)
1367                 if(!sidetotals[i])
1368                         r_shadow_compilingrtlight->static_shadowmap_casters &= ~(1 << i);
1369 }
1370
1371 #define RSURF_MAX_BATCHSURFACES 8192
1372
1373 static const msurface_t *batchsurfacelist[RSURF_MAX_BATCHSURFACES];
1374
1375 void R_Q1BSP_DrawShadowMap(int side, entity_render_t *ent, const vec3_t relativelightorigin, const vec3_t relativelightdirection, float lightradius, int modelnumsurfaces, const int *modelsurfacelist, const unsigned char *surfacesides, const vec3_t lightmins, const vec3_t lightmaxs)
1376 {
1377         dp_model_t *model = ent->model;
1378         const msurface_t *surface;
1379         int modelsurfacelistindex, batchnumsurfaces;
1380         // check the box in modelspace, it was already checked in worldspace
1381         if (!BoxesOverlap(model->normalmins, model->normalmaxs, lightmins, lightmaxs))
1382                 return;
1383         R_FrameData_SetMark();
1384         // identify lit faces within the bounding box
1385         for (modelsurfacelistindex = 0;modelsurfacelistindex < modelnumsurfaces;modelsurfacelistindex++)
1386         {
1387                 surface = model->data_surfaces + modelsurfacelist[modelsurfacelistindex];
1388                 if (surfacesides && !(surfacesides[modelsurfacelistindex] && (1 << side)))
1389                         continue;
1390                 rsurface.texture = R_GetCurrentTexture(surface->texture);
1391                 if (rsurface.texture->currentmaterialflags & MATERIALFLAG_NOSHADOW)
1392                         continue;
1393                 if (!BoxesOverlap(lightmins, lightmaxs, surface->mins, surface->maxs))
1394                         continue;
1395                 r_refdef.stats.lights_dynamicshadowtriangles += surface->num_triangles;
1396                 r_refdef.stats.lights_shadowtriangles += surface->num_triangles;
1397                 batchsurfacelist[0] = surface;
1398                 batchnumsurfaces = 1;
1399                 while(++modelsurfacelistindex < modelnumsurfaces && batchnumsurfaces < RSURF_MAX_BATCHSURFACES)
1400                 {
1401                         surface = model->data_surfaces + modelsurfacelist[modelsurfacelistindex];
1402                         if (surfacesides && !(surfacesides[modelsurfacelistindex] & (1 << side)))
1403                                 continue;
1404                         if (surface->texture != batchsurfacelist[0]->texture)
1405                                 break;
1406                         if (!BoxesOverlap(lightmins, lightmaxs, surface->mins, surface->maxs))
1407                                 continue;
1408                         r_refdef.stats.lights_dynamicshadowtriangles += surface->num_triangles;
1409                         r_refdef.stats.lights_shadowtriangles += surface->num_triangles;
1410                         batchsurfacelist[batchnumsurfaces++] = surface;
1411                 }
1412                 --modelsurfacelistindex;
1413                 GL_CullFace(rsurface.texture->currentmaterialflags & MATERIALFLAG_NOCULLFACE ? GL_NONE : r_refdef.view.cullface_back);
1414                 RSurf_PrepareVerticesForBatch(BATCHNEED_ARRAY_VERTEX, batchnumsurfaces, batchsurfacelist);
1415                 if (rsurface.batchvertex3fbuffer)
1416                         R_Mesh_PrepareVertices_Vertex3f(rsurface.batchnumvertices, rsurface.batchvertex3f, rsurface.batchvertex3fbuffer);
1417                 else
1418                         R_Mesh_PrepareVertices_Vertex3f(rsurface.batchnumvertices, rsurface.batchvertex3f, rsurface.batchvertex3f_vertexbuffer);
1419                 RSurf_DrawBatch();
1420         }
1421         R_FrameData_ReturnToMark();
1422 }
1423
1424 #define BATCHSIZE 1024
1425
1426 static void R_Q1BSP_DrawLight_TransparentCallback(const entity_render_t *ent, const rtlight_t *rtlight, int numsurfaces, int *surfacelist)
1427 {
1428         int i, j, endsurface;
1429         texture_t *t;
1430         const msurface_t *surface;
1431         R_FrameData_SetMark();
1432         // note: in practice this never actually receives batches
1433         R_Shadow_RenderMode_Begin();
1434         R_Shadow_RenderMode_ActiveLight(rtlight);
1435         R_Shadow_RenderMode_Lighting(false, true, false);
1436         R_Shadow_SetupEntityLight(ent);
1437         for (i = 0;i < numsurfaces;i = j)
1438         {
1439                 j = i + 1;
1440                 surface = rsurface.modelsurfaces + surfacelist[i];
1441                 t = surface->texture;
1442                 rsurface.texture = R_GetCurrentTexture(t);
1443                 endsurface = min(j + BATCHSIZE, numsurfaces);
1444                 for (j = i;j < endsurface;j++)
1445                 {
1446                         surface = rsurface.modelsurfaces + surfacelist[j];
1447                         if (t != surface->texture)
1448                                 break;
1449                         R_Shadow_RenderLighting(1, &surface);
1450                 }
1451         }
1452         R_Shadow_RenderMode_End();
1453         R_FrameData_ReturnToMark();
1454 }
1455
1456 extern qboolean r_shadow_usingdeferredprepass;
1457 void R_Q1BSP_DrawLight(entity_render_t *ent, int numsurfaces, const int *surfacelist, const unsigned char *lighttrispvs)
1458 {
1459         dp_model_t *model = ent->model;
1460         const msurface_t *surface;
1461         int i, k, kend, l, endsurface, batchnumsurfaces, texturenumsurfaces;
1462         const msurface_t **texturesurfacelist;
1463         texture_t *tex;
1464         CHECKGLERROR
1465         R_FrameData_SetMark();
1466         // this is a double loop because non-visible surface skipping has to be
1467         // fast, and even if this is not the world model (and hence no visibility
1468         // checking) the input surface list and batch buffer are different formats
1469         // so some processing is necessary.  (luckily models have few surfaces)
1470         for (i = 0;i < numsurfaces;)
1471         {
1472                 batchnumsurfaces = 0;
1473                 endsurface = min(i + RSURF_MAX_BATCHSURFACES, numsurfaces);
1474                 if (ent == r_refdef.scene.worldentity)
1475                 {
1476                         for (;i < endsurface;i++)
1477                                 if (r_refdef.viewcache.world_surfacevisible[surfacelist[i]])
1478                                         batchsurfacelist[batchnumsurfaces++] = model->data_surfaces + surfacelist[i];
1479                 }
1480                 else
1481                 {
1482                         for (;i < endsurface;i++)
1483                                 batchsurfacelist[batchnumsurfaces++] = model->data_surfaces + surfacelist[i];
1484                 }
1485                 if (!batchnumsurfaces)
1486                         continue;
1487                 for (k = 0;k < batchnumsurfaces;k = kend)
1488                 {
1489                         surface = batchsurfacelist[k];
1490                         tex = surface->texture;
1491                         rsurface.texture = R_GetCurrentTexture(tex);
1492                         // gather surfaces into a batch range
1493                         for (kend = k;kend < batchnumsurfaces && tex == batchsurfacelist[kend]->texture;kend++)
1494                                 ;
1495                         // now figure out what to do with this particular range of surfaces
1496                         // VorteX: added MATERIALFLAG_NORTLIGHT
1497                         if ((rsurface.texture->currentmaterialflags & (MATERIALFLAG_WALL + MATERIALFLAG_NORTLIGHT)) != MATERIALFLAG_WALL)
1498                                 continue;
1499                         if (r_waterstate.renderingscene && (rsurface.texture->currentmaterialflags & (MATERIALFLAG_WATERSHADER | MATERIALFLAG_REFRACTION | MATERIALFLAG_REFLECTION | MATERIALFLAG_CAMERA)))
1500                                 continue;
1501                         if (rsurface.texture->currentmaterialflags & MATERIALFLAGMASK_DEPTHSORTED)
1502                         {
1503                                 vec3_t tempcenter, center;
1504                                 for (l = k;l < kend;l++)
1505                                 {
1506                                         surface = batchsurfacelist[l];
1507                                         tempcenter[0] = (surface->mins[0] + surface->maxs[0]) * 0.5f;
1508                                         tempcenter[1] = (surface->mins[1] + surface->maxs[1]) * 0.5f;
1509                                         tempcenter[2] = (surface->mins[2] + surface->maxs[2]) * 0.5f;
1510                                         Matrix4x4_Transform(&rsurface.matrix, tempcenter, center);
1511                                         R_MeshQueue_AddTransparent(rsurface.texture->currentmaterialflags & MATERIALFLAG_NODEPTHTEST ? r_refdef.view.origin : center, R_Q1BSP_DrawLight_TransparentCallback, ent, surface - rsurface.modelsurfaces, rsurface.rtlight);
1512                                 }
1513                                 continue;
1514                         }
1515                         if (r_shadow_usingdeferredprepass)
1516                                 continue;
1517                         texturenumsurfaces = kend - k;
1518                         texturesurfacelist = batchsurfacelist + k;
1519                         R_Shadow_RenderLighting(texturenumsurfaces, texturesurfacelist);
1520                 }
1521         }
1522         R_FrameData_ReturnToMark();
1523 }
1524
1525 //Made by [515]
1526 void R_ReplaceWorldTexture (void)
1527 {
1528         dp_model_t              *m;
1529         texture_t       *t;
1530         int                     i;
1531         const char      *r, *newt;
1532         skinframe_t *skinframe;
1533         if (!r_refdef.scene.worldmodel)
1534         {
1535                 Con_Printf("There is no worldmodel\n");
1536                 return;
1537         }
1538         m = r_refdef.scene.worldmodel;
1539
1540         if(Cmd_Argc() < 2)
1541         {
1542                 Con_Print("r_replacemaptexture <texname> <newtexname> - replaces texture\n");
1543                 Con_Print("r_replacemaptexture <texname> - switch back to default texture\n");
1544                 return;
1545         }
1546         if(!cl.islocalgame || !cl.worldmodel)
1547         {
1548                 Con_Print("This command works only in singleplayer\n");
1549                 return;
1550         }
1551         r = Cmd_Argv(1);
1552         newt = Cmd_Argv(2);
1553         if(!newt[0])
1554                 newt = r;
1555         for(i=0,t=m->data_textures;i<m->num_textures;i++,t++)
1556         {
1557                 if(/*t->width && !strcasecmp(t->name, r)*/ matchpattern( t->name, r, true ) )
1558                 {
1559                         if ((skinframe = R_SkinFrame_LoadExternal(newt, TEXF_MIPMAP | TEXF_ALPHA | TEXF_PICMIP, true)))
1560                         {
1561 //                              t->skinframes[0] = skinframe;
1562                                 t->currentskinframe = skinframe;
1563                                 t->currentskinframe = skinframe;
1564                                 Con_Printf("%s replaced with %s\n", r, newt);
1565                         }
1566                         else
1567                         {
1568                                 Con_Printf("%s was not found\n", newt);
1569                                 return;
1570                         }
1571                 }
1572         }
1573 }
1574
1575 //Made by [515]
1576 void R_ListWorldTextures (void)
1577 {
1578         dp_model_t              *m;
1579         texture_t       *t;
1580         int                     i;
1581         if (!r_refdef.scene.worldmodel)
1582         {
1583                 Con_Printf("There is no worldmodel\n");
1584                 return;
1585         }
1586         m = r_refdef.scene.worldmodel;
1587
1588         Con_Print("Worldmodel textures :\n");
1589         for(i=0,t=m->data_textures;i<m->num_textures;i++,t++)
1590                 if (t->numskinframes)
1591                         Con_Printf("%s\n", t->name);
1592 }
1593
1594 #if 0
1595 static void gl_surf_start(void)
1596 {
1597 }
1598
1599 static void gl_surf_shutdown(void)
1600 {
1601 }
1602
1603 static void gl_surf_newmap(void)
1604 {
1605 }
1606 #endif
1607
1608 void GL_Surf_Init(void)
1609 {
1610
1611         Cvar_RegisterVariable(&r_ambient);
1612         Cvar_RegisterVariable(&r_lockpvs);
1613         Cvar_RegisterVariable(&r_lockvisibility);
1614         Cvar_RegisterVariable(&r_useportalculling);
1615         Cvar_RegisterVariable(&r_usesurfaceculling);
1616         Cvar_RegisterVariable(&r_q3bsp_renderskydepth);
1617
1618         Cmd_AddCommand ("r_replacemaptexture", R_ReplaceWorldTexture, "override a map texture for testing purposes");
1619         Cmd_AddCommand ("r_listmaptextures", R_ListWorldTextures, "list all textures used by the current map");
1620
1621         //R_RegisterModule("GL_Surf", gl_surf_start, gl_surf_shutdown, gl_surf_newmap);
1622 }
1623