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 #include "image.h"
  27
  28 cvar_t r_ambient = {0, "r_ambient", "0", "brightens map, value is 0-128"};
  29 cvar_t r_lockpvs = {0, "r_lockpvs", "0", "disables pvs switching, allows you to walk around and inspect what is visible from a given location in the map (anything not visible from your current location will not be drawn)"};
  30 cvar_t r_lockvisibility = {0, "r_lockvisibility", "0", "disables visibility updates, allows you to walk around and inspect what is visible from a given viewpoint in the map (anything offscreen at the moment this is enabled will not be drawn)"};
  31 cvar_t r_useportalculling = {0, "r_useportalculling", "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)"};
  32 cvar_t r_usesurfaceculling = {0, "r_usesurfaceculling", "1", "skip off-screen surfaces (1 = cull surfaces if the map is likely to benefit, 2 = always cull surfaces)"};
  33 cvar_t r_vis_trace = {0, "r_vis_trace", "0", "test if each portal or leaf is visible using tracelines"};
  34 cvar_t r_vis_trace_samples = {0, "r_vis_trace_samples", "1", "use this many randomly positioned tracelines each frame to refresh the visible timer"};
  35 cvar_t r_vis_trace_delay = {0, "r_vis_trace_delay", "1", "keep a portal visible for this many seconds"};
  36 cvar_t r_vis_trace_eyejitter = {0, "r_vis_trace_eyejitter", "8", "use a random offset of this much on the start of each traceline"};
  37 cvar_t r_vis_trace_enlarge = {0, "r_vis_trace_enlarge", "0", "make portal bounds bigger for tests by (1+this)*size"};
  38 cvar_t r_vis_trace_expand = {0, "r_vis_trace_expand", "0", "make portal bounds bigger for tests by this many units"};
  39 cvar_t r_vis_trace_pad = {0, "r_vis_trace_pad", "8", "accept traces that hit within this many units of the portal"};
  40 cvar_t r_vis_trace_surfaces = {0, "r_vis_trace_surfaces", "0", "also use tracelines to cull surfaces"};
  41 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"};
  42
  43 /*
  44 ===============
  45 R_BuildLightMap
  46
  47 Combine and scale multiple lightmaps into the 8.8 format in blocklights
  48 ===============
  49 */
  50 void R_BuildLightMap (const entity_render_t *ent, msurface_t *surface)
  51 {
  52         int smax, tmax, i, size, size3, maps, l;
  53         int *bl, scale;
  54         unsigned char *lightmap, *out, *stain;
  55         dp_model_t *model = ent->model;
  56         int *intblocklights;
  57         unsigned char *templight;
  58
  59         smax = (surface->lightmapinfo->extents[0]>>4)+1;
  60         tmax = (surface->lightmapinfo->extents[1]>>4)+1;
  61         size = smax*tmax;
  62         size3 = size*3;
  63
  64         r_refdef.stats[r_stat_lightmapupdatepixels] += size;
  65         r_refdef.stats[r_stat_lightmapupdates]++;
  66
  67         if (cl.buildlightmapmemorysize < size*sizeof(int[3]))
  68         {
  69                 cl.buildlightmapmemorysize = size*sizeof(int[3]);
  70                 if (cl.buildlightmapmemory)
  71                         Mem_Free(cl.buildlightmapmemory);
  72                 cl.buildlightmapmemory = (unsigned char *) Mem_Alloc(cls.levelmempool, cl.buildlightmapmemorysize);
  73         }
  74
  75         // these both point at the same buffer, templight is only used for final
  76         // processing and can replace the intblocklights data as it goes
  77         intblocklights = (int *)cl.buildlightmapmemory;
  78         templight = (unsigned char *)cl.buildlightmapmemory;
  79
  80         // update cached lighting info
  81         model->brushq1.lightmapupdateflags[surface - model->data_surfaces] = false;
  82
  83         lightmap = surface->lightmapinfo->samples;
  84
  85 // set to full bright if no light data
  86         bl = intblocklights;
  87         if (!model->brushq1.lightdata)
  88         {
  89                 for (i = 0;i < size3;i++)
  90                         bl[i] = 128*256;
  91         }
  92         else
  93         {
  94 // clear to no light
  95                 memset(bl, 0, size3*sizeof(*bl));
  96
  97 // add all the lightmaps
  98                 if (lightmap)
  99                         for (maps = 0;maps < MAXLIGHTMAPS && surface->lightmapinfo->styles[maps] != 255;maps++, lightmap += size3)
 100                                 for (scale = r_refdef.scene.lightstylevalue[surface->lightmapinfo->styles[maps]], i = 0;i < size3;i++)
 101                                         bl[i] += lightmap[i] * scale;
 102         }
 103
 104         stain = surface->lightmapinfo->stainsamples;
 105         bl = intblocklights;
 106         out = templight;
 107         // the >> 16 shift adjusts down 8 bits to account for the stainmap
 108         // scaling, and remaps the 0-65536 (2x overbright) to 0-256, it will
 109         // be doubled during rendering to achieve 2x overbright
 110         // (0 = 0.0, 128 = 1.0, 256 = 2.0)
 111         if (stain)
 112         {
 113                 for (i = 0;i < size;i++, bl += 3, stain += 3, out += 4)
 114                 {
 115                         l = (bl[0] * stain[0]) >> 16;out[2] = min(l, 255);
 116                         l = (bl[1] * stain[1]) >> 16;out[1] = min(l, 255);
 117                         l = (bl[2] * stain[2]) >> 16;out[0] = min(l, 255);
 118                         out[3] = 255;
 119                 }
 120         }
 121         else
 122         {
 123                 for (i = 0;i < size;i++, bl += 3, out += 4)
 124                 {
 125                         l = bl[0] >> 8;out[2] = min(l, 255);
 126                         l = bl[1] >> 8;out[1] = min(l, 255);
 127                         l = bl[2] >> 8;out[0] = min(l, 255);
 128                         out[3] = 255;
 129                 }
 130         }
 131
 132         if(vid_sRGB.integer && vid_sRGB_fallback.integer && !vid.sRGB3D)
 133                 Image_MakesRGBColorsFromLinear_Lightmap(templight, templight, size);
 134         R_UpdateTexture(surface->lightmaptexture, templight, surface->lightmapinfo->lightmaporigin[0], surface->lightmapinfo->lightmaporigin[1], 0, smax, tmax, 1);
 135
 136         // update the surface's deluxemap if it has one
 137         if (surface->deluxemaptexture != r_texture_blanknormalmap)
 138         {
 139                 vec3_t n;
 140                 unsigned char *normalmap = surface->lightmapinfo->nmapsamples;
 141                 lightmap = surface->lightmapinfo->samples;
 142                 // clear to no normalmap
 143                 bl = intblocklights;
 144                 memset(bl, 0, size3*sizeof(*bl));
 145                 // add all the normalmaps
 146                 if (lightmap && normalmap)
 147                 {
 148                         for (maps = 0;maps < MAXLIGHTMAPS && surface->lightmapinfo->styles[maps] != 255;maps++, lightmap += size3, normalmap += size3)
 149                         {
 150                                 for (scale = r_refdef.scene.lightstylevalue[surface->lightmapinfo->styles[maps]], i = 0;i < size;i++)
 151                                 {
 152                                         // add the normalmap with weighting proportional to the style's lightmap intensity
 153                                         l = (int)(VectorLength(lightmap + i*3) * scale);
 154                                         bl[i*3+0] += ((int)normalmap[i*3+0] - 128) * l;
 155                                         bl[i*3+1] += ((int)normalmap[i*3+1] - 128) * l;
 156                                         bl[i*3+2] += ((int)normalmap[i*3+2] - 128) * l;
 157                                 }
 158                         }
 159                 }
 160                 bl = intblocklights;
 161                 out = templight;
 162                 // we simply renormalize the weighted normals to get a valid deluxemap
 163                 for (i = 0;i < size;i++, bl += 3, out += 4)
 164                 {
 165                         VectorCopy(bl, n);
 166                         VectorNormalize(n);
 167                         l = (int)(n[0] * 128 + 128);out[2] = bound(0, l, 255);
 168                         l = (int)(n[1] * 128 + 128);out[1] = bound(0, l, 255);
 169                         l = (int)(n[2] * 128 + 128);out[0] = bound(0, l, 255);
 170                         out[3] = 255;
 171                 }
 172                 R_UpdateTexture(surface->deluxemaptexture, templight, surface->lightmapinfo->lightmaporigin[0], surface->lightmapinfo->lightmaporigin[1], 0, smax, tmax, 1);
 173         }
 174 }
 175
 176 static void R_StainNode (mnode_t *node, dp_model_t *model, const vec3_t origin, float radius, const float fcolor[8])
 177 {
 178         float ndist, a, ratio, maxdist, maxdist2, maxdist3, invradius, sdtable[256], td, dist2;
 179         msurface_t *surface, *endsurface;
 180         int i, s, t, smax, tmax, smax3, impacts, impactt, stained;
 181         unsigned char *bl;
 182         vec3_t impact;
 183
 184         maxdist = radius * radius;
 185         invradius = 1.0f / radius;
 186
 187 loc0:
 188         if (!node->plane)
 189                 return;
 190         ndist = PlaneDiff(origin, node->plane);
 191         if (ndist > radius)
 192         {
 193                 node = node->children[0];
 194                 goto loc0;
 195         }
 196         if (ndist < -radius)
 197         {
 198                 node = node->children[1];
 199                 goto loc0;
 200         }
 201
 202         dist2 = ndist * ndist;
 203         maxdist3 = maxdist - dist2;
 204
 205         if (node->plane->type < 3)
 206         {
 207                 VectorCopy(origin, impact);
 208                 impact[node->plane->type] -= ndist;
 209         }
 210         else
 211         {
 212                 impact[0] = origin[0] - node->plane->normal[0] * ndist;
 213                 impact[1] = origin[1] - node->plane->normal[1] * ndist;
 214                 impact[2] = origin[2] - node->plane->normal[2] * ndist;
 215         }
 216
 217         for (surface = model->data_surfaces + node->firstsurface, endsurface = surface + node->numsurfaces;surface < endsurface;surface++)
 218         {
 219                 if (surface->lightmapinfo->stainsamples)
 220                 {
 221                         smax = (surface->lightmapinfo->extents[0] >> 4) + 1;
 222                         tmax = (surface->lightmapinfo->extents[1] >> 4) + 1;
 223
 224                         impacts = (int)(DotProduct (impact, surface->lightmapinfo->texinfo->vecs[0]) + surface->lightmapinfo->texinfo->vecs[0][3] - surface->lightmapinfo->texturemins[0]);
 225                         impactt = (int)(DotProduct (impact, surface->lightmapinfo->texinfo->vecs[1]) + surface->lightmapinfo->texinfo->vecs[1][3] - surface->lightmapinfo->texturemins[1]);
 226
 227                         s = bound(0, impacts, smax * 16) - impacts;
 228                         t = bound(0, impactt, tmax * 16) - impactt;
 229                         i = (int)(s * s + t * t + dist2);
 230                         if ((i > maxdist) || (smax > (int)(sizeof(sdtable)/sizeof(sdtable[0])))) // smax overflow fix from Andreas Dehmel
 231                                 continue;
 232
 233                         // reduce calculations
 234                         for (s = 0, i = impacts; s < smax; s++, i -= 16)
 235                                 sdtable[s] = i * i + dist2;
 236
 237                         bl = surface->lightmapinfo->stainsamples;
 238                         smax3 = smax * 3;
 239                         stained = false;
 240
 241                         i = impactt;
 242                         for (t = 0;t < tmax;t++, i -= 16)
 243                         {
 244                                 td = i * i;
 245                                 // make sure some part of it is visible on this line
 246                                 if (td < maxdist3)
 247                                 {
 248                                         maxdist2 = maxdist - td;
 249                                         for (s = 0;s < smax;s++)
 250                                         {
 251                                                 if (sdtable[s] < maxdist2)
 252                                                 {
 253                                                         ratio = lhrandom(0.0f, 1.0f);
 254                                                         a = (fcolor[3] + ratio * fcolor[7]) * (1.0f - sqrt(sdtable[s] + td) * invradius);
 255                                                         if (a >= (1.0f / 64.0f))
 256                                                         {
 257                                                                 if (a > 1)
 258                                                                         a = 1;
 259                                                                 bl[0] = (unsigned char) ((float) bl[0] + a * ((fcolor[0] + ratio * fcolor[4]) - (float) bl[0]));
 260                                                                 bl[1] = (unsigned char) ((float) bl[1] + a * ((fcolor[1] + ratio * fcolor[5]) - (float) bl[1]));
 261                                                                 bl[2] = (unsigned char) ((float) bl[2] + a * ((fcolor[2] + ratio * fcolor[6]) - (float) bl[2]));
 262                                                                 stained = true;
 263                                                         }
 264                                                 }
 265                                                 bl += 3;
 266                                         }
 267                                 }
 268                                 else // skip line
 269                                         bl += smax3;
 270                         }
 271                         // force lightmap upload
 272                         if (stained)
 273                                 model->brushq1.lightmapupdateflags[surface - model->data_surfaces] = true;
 274                 }
 275         }
 276
 277         if (node->children[0]->plane)
 278         {
 279                 if (node->children[1]->plane)
 280                 {
 281                         R_StainNode(node->children[0], model, origin, radius, fcolor);
 282                         node = node->children[1];
 283                         goto loc0;
 284                 }
 285                 else
 286                 {
 287                         node = node->children[0];
 288                         goto loc0;
 289                 }
 290         }
 291         else if (node->children[1]->plane)
 292         {
 293                 node = node->children[1];
 294                 goto loc0;
 295         }
 296 }
 297
 298 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)
 299 {
 300         int n;
 301         float fcolor[8];
 302         entity_render_t *ent;
 303         dp_model_t *model;
 304         vec3_t org;
 305         if (r_refdef.scene.worldmodel == NULL || !r_refdef.scene.worldmodel->brush.data_nodes || !r_refdef.scene.worldmodel->brushq1.lightdata)
 306                 return;
 307         fcolor[0] = cr1;
 308         fcolor[1] = cg1;
 309         fcolor[2] = cb1;
 310         fcolor[3] = ca1 * (1.0f / 64.0f);
 311         fcolor[4] = cr2 - cr1;
 312         fcolor[5] = cg2 - cg1;
 313         fcolor[6] = cb2 - cb1;
 314         fcolor[7] = (ca2 - ca1) * (1.0f / 64.0f);
 315
 316         R_StainNode(r_refdef.scene.worldmodel->brush.data_nodes + r_refdef.scene.worldmodel->brushq1.hulls[0].firstclipnode, r_refdef.scene.worldmodel, origin, radius, fcolor);
 317
 318         // look for embedded bmodels
 319         for (n = 0;n < cl.num_brushmodel_entities;n++)
 320         {
 321                 ent = &cl.entities[cl.brushmodel_entities[n]].render;
 322                 model = ent->model;
 323                 if (model && model->name[0] == '*')
 324                 {
 325                         if (model->brush.data_nodes)
 326                         {
 327                                 Matrix4x4_Transform(&ent->inversematrix, origin, org);
 328                                 R_StainNode(model->brush.data_nodes + model->brushq1.hulls[0].firstclipnode, model, org, radius, fcolor);
 329                         }
 330                 }
 331         }
 332 }
 333
 334
 335 /*
 336 =============================================================
 337
 338         BRUSH MODELS
 339
 340 =============================================================
 341 */
 342
 343 static void R_DrawPortal_Callback(const entity_render_t *ent, const rtlight_t *rtlight, int numsurfaces, int *surfacelist)
 344 {
 345         // due to the hacky nature of this function's parameters, this is never
 346         // called with a batch, so numsurfaces is always 1, and the surfacelist
 347         // contains only a leaf number for coloring purposes
 348         const mportal_t *portal = (mportal_t *)ent;
 349         qboolean isvis;
 350         int i, numpoints;
 351         float *v;
 352         float vertex3f[POLYGONELEMENTS_MAXPOINTS*3];
 353         CHECKGLERROR
 354         GL_BlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
 355         GL_DepthMask(false);
 356         GL_DepthRange(0, 1);
 357         GL_PolygonOffset(r_refdef.polygonfactor, r_refdef.polygonoffset);
 358         GL_DepthTest(true);
 359         GL_CullFace(GL_NONE);
 360         R_EntityMatrix(&identitymatrix);
 361
 362         numpoints = min(portal->numpoints, POLYGONELEMENTS_MAXPOINTS);
 363
 364 //      R_Mesh_ResetTextureState();
 365
 366         isvis = (portal->here->clusterindex >= 0 && portal->past->clusterindex >= 0 && portal->here->clusterindex != portal->past->clusterindex);
 367
 368         i = surfacelist[0] >> 1;
 369         GL_Color(((i & 0x0007) >> 0) * (1.0f / 7.0f) * r_refdef.view.colorscale,
 370                          ((i & 0x0038) >> 3) * (1.0f / 7.0f) * r_refdef.view.colorscale,
 371                          ((i & 0x01C0) >> 6) * (1.0f / 7.0f) * r_refdef.view.colorscale,
 372                          isvis ? 0.125f : 0.03125f);
 373         for (i = 0, v = vertex3f;i < numpoints;i++, v += 3)
 374                 VectorCopy(portal->points[i].position, v);
 375         R_Mesh_PrepareVertices_Generic_Arrays(numpoints, vertex3f, NULL, NULL);
 376         R_SetupShader_Generic_NoTexture(false, false);
 377         R_Mesh_Draw(0, numpoints, 0, numpoints - 2, polygonelement3i, NULL, 0, polygonelement3s, NULL, 0);
 378 }
 379
 380 // LadyHavoc: this is just a nice debugging tool, very slow
 381 void R_DrawPortals(void)
 382 {
 383         int i, leafnum;
 384         mportal_t *portal;
 385         float center[3], f;
 386         dp_model_t *model = r_refdef.scene.worldmodel;
 387         if (model == NULL)
 388                 return;
 389         for (leafnum = 0;leafnum < r_refdef.scene.worldmodel->brush.num_leafs;leafnum++)
 390         {
 391                 if (r_refdef.viewcache.world_leafvisible[leafnum])
 392                 {
 393                         //for (portalnum = 0, portal = model->brush.data_portals;portalnum < model->brush.num_portals;portalnum++, portal++)
 394                         for (portal = r_refdef.scene.worldmodel->brush.data_leafs[leafnum].portals;portal;portal = portal->next)
 395                         {
 396                                 if (portal->numpoints <= POLYGONELEMENTS_MAXPOINTS)
 397                                 if (!R_CullBox(portal->mins, portal->maxs))
 398                                 {
 399                                         VectorClear(center);
 400                                         for (i = 0;i < portal->numpoints;i++)
 401                                                 VectorAdd(center, portal->points[i].position, center);
 402                                         f = ixtable[portal->numpoints];
 403                                         VectorScale(center, f, center);
 404                                         R_MeshQueue_AddTransparent(TRANSPARENTSORT_DISTANCE, center, R_DrawPortal_Callback, (entity_render_t *)portal, leafnum, rsurface.rtlight);
 405                                 }
 406                         }
 407                 }
 408         }
 409 }
 410
 411 static void R_View_WorldVisibility_CullSurfaces(void)
 412 {
 413         int surfaceindex;
 414         int surfaceindexstart;
 415         int surfaceindexend;
 416         unsigned char *surfacevisible;
 417         msurface_t *surfaces;
 418         dp_model_t *model = r_refdef.scene.worldmodel;
 419         if (!model)
 420                 return;
 421         if (r_trippy.integer)
 422                 return;
 423         if (r_usesurfaceculling.integer < 1)
 424                 return;
 425         surfaceindexstart = model->firstmodelsurface;
 426         surfaceindexend = surfaceindexstart + model->nummodelsurfaces;
 427         surfaces = model->data_surfaces;
 428         surfacevisible = r_refdef.viewcache.world_surfacevisible;
 429         for (surfaceindex = surfaceindexstart; surfaceindex < surfaceindexend; surfaceindex++)
 430         {
 431                 if (surfacevisible[surfaceindex])
 432                 {
 433                         if (R_CullBox(surfaces[surfaceindex].mins, surfaces[surfaceindex].maxs)
 434                          || (r_vis_trace_surfaces.integer && !R_CanSeeBox(r_vis_trace_samples.integer, r_vis_trace_eyejitter.value, r_vis_trace_enlarge.value, r_vis_trace_expand.value, r_vis_trace_pad.value, r_refdef.view.origin, surfaces[surfaceindex].mins, surfaces[surfaceindex].maxs)))
 435                                 surfacevisible[surfaceindex] = 0;
 436                 }
 437         }
 438 }
 439
 440 void R_View_WorldVisibility(qboolean forcenovis)
 441 {
 442         int i, j, *mark;
 443         mleaf_t *leaf;
 444         mleaf_t *viewleaf;
 445         dp_model_t *model = r_refdef.scene.worldmodel;
 446
 447         if (!model)
 448                 return;
 449
 450         if (r_refdef.view.usecustompvs)
 451         {
 452                 // clear the visible surface and leaf flags arrays
 453                 memset(r_refdef.viewcache.world_surfacevisible, 0, model->num_surfaces);
 454                 memset(r_refdef.viewcache.world_leafvisible, 0, model->brush.num_leafs);
 455                 r_refdef.viewcache.world_novis = false;
 456
 457                 // simply cull each marked leaf to the frustum (view pyramid)
 458                 for (j = 0, leaf = model->brush.data_leafs;j < model->brush.num_leafs;j++, leaf++)
 459                 {
 460                         // if leaf is in current pvs and on the screen, mark its surfaces
 461                         if (CHECKPVSBIT(r_refdef.viewcache.world_pvsbits, leaf->clusterindex) && !R_CullBox(leaf->mins, leaf->maxs))
 462                         {
 463                                 r_refdef.stats[r_stat_world_leafs]++;
 464                                 r_refdef.viewcache.world_leafvisible[j] = true;
 465                                 if (leaf->numleafsurfaces)
 466                                         for (i = 0, mark = leaf->firstleafsurface;i < leaf->numleafsurfaces;i++, mark++)
 467                                                 r_refdef.viewcache.world_surfacevisible[*mark] = true;
 468                         }
 469                 }
 470                 R_View_WorldVisibility_CullSurfaces();
 471                 return;
 472         }
 473
 474         // if possible find the leaf the view origin is in
 475         viewleaf = model->brush.PointInLeaf ? model->brush.PointInLeaf(model, r_refdef.view.origin) : NULL;
 476         // if possible fetch the visible cluster bits
 477         if (!r_lockpvs.integer && model->brush.FatPVS)
 478                 model->brush.FatPVS(model, r_refdef.view.origin, 2, r_refdef.viewcache.world_pvsbits, (r_refdef.viewcache.world_numclusters+7)>>3, false);
 479
 480         if (!r_lockvisibility.integer)
 481         {
 482                 // clear the visible surface and leaf flags arrays
 483                 memset(r_refdef.viewcache.world_surfacevisible, 0, model->num_surfaces);
 484                 memset(r_refdef.viewcache.world_leafvisible, 0, model->brush.num_leafs);
 485
 486                 r_refdef.viewcache.world_novis = false;
 487
 488                 // if floating around in the void (no pvs data available, and no
 489                 // portals available), simply use all on-screen leafs.
 490                 if (!viewleaf || viewleaf->clusterindex < 0 || forcenovis || !r_refdef.view.usevieworiginculling)
 491                 {
 492                         // no visibility method: (used when floating around in the void)
 493                         // simply cull each leaf to the frustum (view pyramid)
 494                         // similar to quake's RecursiveWorldNode but without cache misses
 495                         r_refdef.viewcache.world_novis = true;
 496                         for (j = 0, leaf = model->brush.data_leafs;j < model->brush.num_leafs;j++, leaf++)
 497                         {
 498                                 if (leaf->clusterindex < 0)
 499                                         continue;
 500                                 // if leaf is in current pvs and on the screen, mark its surfaces
 501                                 if (!R_CullBox(leaf->mins, leaf->maxs))
 502                                 {
 503                                         r_refdef.stats[r_stat_world_leafs]++;
 504                                         r_refdef.viewcache.world_leafvisible[j] = true;
 505                                         if (leaf->numleafsurfaces)
 506                                                 for (i = 0, mark = leaf->firstleafsurface;i < leaf->numleafsurfaces;i++, mark++)
 507                                                         r_refdef.viewcache.world_surfacevisible[*mark] = true;
 508                                 }
 509                         }
 510                 }
 511                 // just check if each leaf in the PVS is on screen
 512                 // (unless portal culling is enabled)
 513                 else if (!model->brush.data_portals || r_useportalculling.integer < 1 || (r_useportalculling.integer < 2 && !r_novis.integer))
 514                 {
 515                         // pvs method:
 516                         // simply check if each leaf is in the Potentially Visible Set,
 517                         // and cull to frustum (view pyramid)
 518                         // similar to quake's RecursiveWorldNode but without cache misses
 519                         for (j = 0, leaf = model->brush.data_leafs;j < model->brush.num_leafs;j++, leaf++)
 520                         {
 521                                 if (leaf->clusterindex < 0)
 522                                         continue;
 523                                 // if leaf is in current pvs and on the screen, mark its surfaces
 524                                 if (CHECKPVSBIT(r_refdef.viewcache.world_pvsbits, leaf->clusterindex) && !R_CullBox(leaf->mins, leaf->maxs))
 525                                 {
 526                                         r_refdef.stats[r_stat_world_leafs]++;
 527                                         r_refdef.viewcache.world_leafvisible[j] = true;
 528                                         if (leaf->numleafsurfaces)
 529                                                 for (i = 0, mark = leaf->firstleafsurface;i < leaf->numleafsurfaces;i++, mark++)
 530                                                         r_refdef.viewcache.world_surfacevisible[*mark] = true;
 531                                 }
 532                         }
 533                 }
 534                 // if desired use a recursive portal flow, culling each portal to
 535                 // frustum and checking if the leaf the portal leads to is in the pvs
 536                 else
 537                 {
 538                         int leafstackpos;
 539                         mportal_t *p;
 540                         mleaf_t *leafstack[8192];
 541                         vec3_t cullmins, cullmaxs;
 542                         float cullbias = r_nearclip.value * 2.0f; // the nearclip plane can easily end up culling portals in certain perfectly-aligned views, causing view blackouts
 543                         // simple-frustum portal method:
 544                         // follows portals leading outward from viewleaf, does not venture
 545                         // offscreen or into leafs that are not visible, faster than
 546                         // Quake's RecursiveWorldNode and vastly better in unvised maps,
 547                         // often culls some surfaces that pvs alone would miss
 548                         // (such as a room in pvs that is hidden behind a wall, but the
 549                         //  passage leading to the room is off-screen)
 550                         leafstack[0] = viewleaf;
 551                         leafstackpos = 1;
 552                         while (leafstackpos)
 553                         {
 554                                 leaf = leafstack[--leafstackpos];
 555                                 if (r_refdef.viewcache.world_leafvisible[leaf - model->brush.data_leafs])
 556                                         continue;
 557                                 if (leaf->clusterindex < 0)
 558                                         continue;
 559                                 r_refdef.stats[r_stat_world_leafs]++;
 560                                 r_refdef.viewcache.world_leafvisible[leaf - model->brush.data_leafs] = true;
 561                                 // mark any surfaces bounding this leaf
 562                                 if (leaf->numleafsurfaces)
 563                                         for (i = 0, mark = leaf->firstleafsurface;i < leaf->numleafsurfaces;i++, mark++)
 564                                                 r_refdef.viewcache.world_surfacevisible[*mark] = true;
 565                                 // follow portals into other leafs
 566                                 // the checks are:
 567                                 // the leaf has not been visited yet
 568                                 // and the leaf is visible in the pvs
 569                                 // the portal polygon's bounding box is on the screen
 570                                 for (p = leaf->portals;p;p = p->next)
 571                                 {
 572                                         r_refdef.stats[r_stat_world_portals]++;
 573                                         if (r_refdef.viewcache.world_leafvisible[p->past - model->brush.data_leafs])
 574                                                 continue;
 575                                         if (!CHECKPVSBIT(r_refdef.viewcache.world_pvsbits, p->past->clusterindex))
 576                                                 continue;
 577                                         cullmins[0] = p->mins[0] - cullbias;
 578                                         cullmins[1] = p->mins[1] - cullbias;
 579                                         cullmins[2] = p->mins[2] - cullbias;
 580                                         cullmaxs[0] = p->maxs[0] + cullbias;
 581                                         cullmaxs[1] = p->maxs[1] + cullbias;
 582                                         cullmaxs[2] = p->maxs[2] + cullbias;
 583                                         if (R_CullBox(cullmins, cullmaxs))
 584                                                 continue;
 585                                         if (r_vis_trace.integer)
 586                                         {
 587                                                 if (p->tracetime != realtime && R_CanSeeBox(r_vis_trace_samples.value, r_vis_trace_eyejitter.value, r_vis_trace_enlarge.value, r_vis_trace_expand.value, r_vis_trace_pad.value, r_refdef.view.origin, cullmins, cullmaxs))
 588                                                         p->tracetime = realtime;
 589                                                 if (realtime - p->tracetime > r_vis_trace_delay.value)
 590                                                         continue;
 591                                         }
 592                                         if (leafstackpos >= (int)(sizeof(leafstack) / sizeof(leafstack[0])))
 593                                                 break;
 594                                         leafstack[leafstackpos++] = p->past;
 595                                 }
 596                         }
 597                 }
 598         }
 599
 600         R_View_WorldVisibility_CullSurfaces();
 601 }
 602
 603 void R_Q1BSP_DrawSky(entity_render_t *ent)
 604 {
 605         if (ent->model == NULL)
 606                 return;
 607         R_DrawModelSurfaces(ent, true, true, false, false, false, false);
 608 }
 609
 610 void R_Q1BSP_DrawAddWaterPlanes(entity_render_t *ent)
 611 {
 612         int i, j, n, flagsmask;
 613         dp_model_t *model = ent->model;
 614         msurface_t *surfaces;
 615         if (model == NULL)
 616                 return;
 617
 618         RSurf_ActiveModelEntity(ent, true, false, false);
 619
 620         surfaces = model->data_surfaces;
 621         flagsmask = MATERIALFLAG_WATERSHADER | MATERIALFLAG_REFRACTION | MATERIALFLAG_REFLECTION | MATERIALFLAG_CAMERA;
 622
 623         // add visible surfaces to draw list
 624         if (ent == r_refdef.scene.worldentity)
 625         {
 626                 for (i = 0;i < model->nummodelsurfaces;i++)
 627                 {
 628                         j = model->sortedmodelsurfaces[i];
 629                         if (r_refdef.viewcache.world_surfacevisible[j])
 630                                 if (surfaces[j].texture->basematerialflags & flagsmask)
 631                                         R_Water_AddWaterPlane(surfaces + j, 0);
 632                 }
 633         }
 634         else
 635         {
 636                 if(ent->entitynumber >= MAX_EDICTS) // && CL_VM_TransformView(ent->entitynumber - MAX_EDICTS, NULL, NULL, NULL))
 637                         n = ent->entitynumber;
 638                 else
 639                         n = 0;
 640                 for (i = 0;i < model->nummodelsurfaces;i++)
 641                 {
 642                         j = model->sortedmodelsurfaces[i];
 643                         if (surfaces[j].texture->basematerialflags & flagsmask)
 644                                 R_Water_AddWaterPlane(surfaces + j, n);
 645                 }
 646         }
 647         rsurface.entity = NULL; // used only by R_GetCurrentTexture and RSurf_ActiveModelEntity
 648 }
 649
 650 void R_Q1BSP_Draw(entity_render_t *ent)
 651 {
 652         dp_model_t *model = ent->model;
 653         if (model == NULL)
 654                 return;
 655         R_DrawModelSurfaces(ent, false, true, false, false, false, false);
 656 }
 657
 658 void R_Q1BSP_DrawDepth(entity_render_t *ent)
 659 {
 660         dp_model_t *model = ent->model;
 661         if (model == NULL || model->surfmesh.isanimated)
 662                 return;
 663         GL_ColorMask(0,0,0,0);
 664         GL_Color(1,1,1,1);
 665         GL_DepthTest(true);
 666         GL_BlendFunc(GL_ONE, GL_ZERO);
 667         GL_DepthMask(true);
 668 //      R_Mesh_ResetTextureState();
 669         R_DrawModelSurfaces(ent, false, false, true, false, false, false);
 670         GL_ColorMask(r_refdef.view.colormask[0], r_refdef.view.colormask[1], r_refdef.view.colormask[2], 1);
 671 }
 672
 673 void R_Q1BSP_DrawDebug(entity_render_t *ent)
 674 {
 675         if (ent->model == NULL)
 676                 return;
 677         R_DrawModelSurfaces(ent, false, false, false, true, false, false);
 678 }
 679
 680 void R_Q1BSP_DrawPrepass(entity_render_t *ent)
 681 {
 682         dp_model_t *model = ent->model;
 683         if (model == NULL)
 684                 return;
 685         R_DrawModelSurfaces(ent, false, true, false, false, true, false);
 686 }
 687
 688 typedef struct r_q1bsp_getlightinfo_s
 689 {
 690         dp_model_t *model;
 691         vec3_t relativelightorigin;
 692         float lightradius;
 693         int *outleaflist;
 694         unsigned char *outleafpvs;
 695         int outnumleafs;
 696         unsigned char *visitingleafpvs;
 697         int *outsurfacelist;
 698         unsigned char *outsurfacepvs;
 699         unsigned char *tempsurfacepvs;
 700         unsigned char *outshadowtrispvs;
 701         unsigned char *outlighttrispvs;
 702         int outnumsurfaces;
 703         vec3_t outmins;
 704         vec3_t outmaxs;
 705         vec3_t lightmins;
 706         vec3_t lightmaxs;
 707         const unsigned char *pvs;
 708         qboolean svbsp_active;
 709         qboolean svbsp_insertoccluder;
 710         qboolean noocclusion; // avoids PVS culling
 711         qboolean frontsidecasting; // casts shadows from surfaces facing the light (otherwise ones facing away)
 712         int numfrustumplanes;
 713         const mplane_t *frustumplanes;
 714 }
 715 r_q1bsp_getlightinfo_t;
 716
 717 #define GETLIGHTINFO_MAXNODESTACK 4096
 718
 719 static void R_Q1BSP_RecursiveGetLightInfo_BSP(r_q1bsp_getlightinfo_t *info, qboolean skipsurfaces)
 720 {
 721         // nodestack
 722         mnode_t *nodestack[GETLIGHTINFO_MAXNODESTACK];
 723         int nodestackpos = 0;
 724         // node processing
 725         mplane_t *plane;
 726         mnode_t *node;
 727         int sides;
 728         // leaf processing
 729         mleaf_t *leaf;
 730         const msurface_t *surface;
 731         const msurface_t *surfaces = info->model->data_surfaces;
 732         int numleafsurfaces;
 733         int leafsurfaceindex;
 734         int surfaceindex;
 735         int triangleindex, t;
 736         int currentmaterialflags;
 737         qboolean castshadow;
 738         const int *e;
 739         const vec_t *v[3];
 740         float v2[3][3];
 741         qboolean insidebox;
 742         qboolean noocclusion = info->noocclusion;
 743         qboolean frontsidecasting = info->frontsidecasting;
 744         qboolean svbspactive = info->svbsp_active;
 745         qboolean svbspinsertoccluder = info->svbsp_insertoccluder;
 746         const int *leafsurfaceindices;
 747         qboolean addedtris;
 748         int i;
 749         mportal_t *portal;
 750         static float points[128][3];
 751         // push the root node onto our nodestack
 752         nodestack[nodestackpos++] = info->model->brush.data_nodes;
 753         // we'll be done when the nodestack is empty
 754         while (nodestackpos)
 755         {
 756                 // get a node from the stack to process
 757                 node = nodestack[--nodestackpos];
 758                 // is it a node or a leaf?
 759                 plane = node->plane;
 760                 if (plane)
 761                 {
 762                         // node
 763 #if 0
 764                         if (!BoxesOverlap(info->lightmins, info->lightmaxs, node->mins, node->maxs))
 765                                 continue;
 766 #endif
 767 #if 0
 768                         if (!r_shadow_compilingrtlight && R_CullBoxCustomPlanes(node->mins, node->maxs, rtlight->cached_numfrustumplanes, rtlight->cached_frustumplanes))
 769                                 continue;
 770 #endif
 771                         // axial planes can be processed much more quickly
 772                         if (plane->type < 3)
 773                         {
 774                                 // axial plane
 775                                 if (info->lightmins[plane->type] > plane->dist)
 776                                         nodestack[nodestackpos++] = node->children[0];
 777                                 else if (info->lightmaxs[plane->type] < plane->dist)
 778                                         nodestack[nodestackpos++] = node->children[1];
 779                                 else
 780                                 {
 781                                         // recurse front side first because the svbsp building prefers it
 782                                         if (info->relativelightorigin[plane->type] >= plane->dist)
 783                                         {
 784                                                 if (nodestackpos < GETLIGHTINFO_MAXNODESTACK-1)
 785                                                         nodestack[nodestackpos++] = node->children[0];
 786                                                 nodestack[nodestackpos++] = node->children[1];
 787                                         }
 788                                         else
 789                                         {
 790                                                 if (nodestackpos < GETLIGHTINFO_MAXNODESTACK-1)
 791                                                         nodestack[nodestackpos++] = node->children[1];
 792                                                 nodestack[nodestackpos++] = node->children[0];
 793                                         }
 794                                 }
 795                         }
 796                         else
 797                         {
 798                                 // sloped plane
 799                                 sides = BoxOnPlaneSide(info->lightmins, info->lightmaxs, plane);
 800                                 switch (sides)
 801                                 {
 802                                 default:
 803                                         continue; // ERROR: NAN bounding box!
 804                                 case 1:
 805                                         nodestack[nodestackpos++] = node->children[0];
 806                                         break;
 807                                 case 2:
 808                                         nodestack[nodestackpos++] = node->children[1];
 809                                         break;
 810                                 case 3:
 811                                         // recurse front side first because the svbsp building prefers it
 812                                         if (PlaneDist(info->relativelightorigin, plane) >= 0)
 813                                         {
 814                                                 if (nodestackpos < GETLIGHTINFO_MAXNODESTACK-1)
 815                                                         nodestack[nodestackpos++] = node->children[0];
 816                                                 nodestack[nodestackpos++] = node->children[1];
 817                                         }
 818                                         else
 819                                         {
 820                                                 if (nodestackpos < GETLIGHTINFO_MAXNODESTACK-1)
 821                                                         nodestack[nodestackpos++] = node->children[1];
 822                                                 nodestack[nodestackpos++] = node->children[0];
 823                                         }
 824                                         break;
 825                                 }
 826                         }
 827                 }
 828                 else
 829                 {
 830                         // leaf
 831                         leaf = (mleaf_t *)node;
 832 #if 1
 833                         if (!info->noocclusion && info->pvs != NULL && !CHECKPVSBIT(info->pvs, leaf->clusterindex))
 834                                 continue;
 835 #endif
 836 #if 1
 837                         if (!BoxesOverlap(info->lightmins, info->lightmaxs, leaf->mins, leaf->maxs))
 838                                 continue;
 839 #endif
 840 #if 1
 841                         if (!r_shadow_compilingrtlight && R_CullBoxCustomPlanes(leaf->mins, leaf->maxs, info->numfrustumplanes, info->frustumplanes))
 842                                 continue;
 843 #endif
 844
 845                         if (svbspactive)
 846                         {
 847                                 // we can occlusion test the leaf by checking if all of its portals
 848                                 // are occluded (unless the light is in this leaf - but that was
 849                                 // already handled by the caller)
 850                                 for (portal = leaf->portals;portal;portal = portal->next)
 851                                 {
 852                                         for (i = 0;i < portal->numpoints;i++)
 853                                                 VectorCopy(portal->points[i].position, points[i]);
 854                                         if (SVBSP_AddPolygon(&r_svbsp, portal->numpoints, points[0], false, NULL, NULL, 0) & 2)
 855                                                 break;
 856                                 }
 857                                 if (leaf->portals && portal == NULL)
 858                                         continue; // no portals of this leaf visible
 859                         }
 860
 861                         // add this leaf to the reduced light bounds
 862                         info->outmins[0] = min(info->outmins[0], leaf->mins[0]);
 863                         info->outmins[1] = min(info->outmins[1], leaf->mins[1]);
 864                         info->outmins[2] = min(info->outmins[2], leaf->mins[2]);
 865                         info->outmaxs[0] = max(info->outmaxs[0], leaf->maxs[0]);
 866                         info->outmaxs[1] = max(info->outmaxs[1], leaf->maxs[1]);
 867                         info->outmaxs[2] = max(info->outmaxs[2], leaf->maxs[2]);
 868
 869                         // mark this leaf as being visible to the light
 870                         if (info->outleafpvs)
 871                         {
 872                                 int leafindex = leaf - info->model->brush.data_leafs;
 873                                 if (!CHECKPVSBIT(info->outleafpvs, leafindex))
 874                                 {
 875                                         SETPVSBIT(info->outleafpvs, leafindex);
 876                                         info->outleaflist[info->outnumleafs++] = leafindex;
 877                                 }
 878                         }
 879
 880                         // when using BIH, we skip the surfaces here
 881                         if (skipsurfaces)
 882                                 continue;
 883
 884                         // iterate the surfaces linked by this leaf and check their triangles
 885                         leafsurfaceindices = leaf->firstleafsurface;
 886                         numleafsurfaces = leaf->numleafsurfaces;
 887                         if (svbspinsertoccluder)
 888                         {
 889                                 for (leafsurfaceindex = 0;leafsurfaceindex < numleafsurfaces;leafsurfaceindex++)
 890                                 {
 891                                         surfaceindex = leafsurfaceindices[leafsurfaceindex];
 892                                         if (CHECKPVSBIT(info->outsurfacepvs, surfaceindex))
 893                                                 continue;
 894                                         SETPVSBIT(info->outsurfacepvs, surfaceindex);
 895                                         surface = surfaces + surfaceindex;
 896                                         if (!BoxesOverlap(info->lightmins, info->lightmaxs, surface->mins, surface->maxs))
 897                                                 continue;
 898                                         currentmaterialflags = R_GetCurrentTexture(surface->texture)->currentmaterialflags;
 899                                         castshadow = !(currentmaterialflags & MATERIALFLAG_NOSHADOW);
 900                                         if (!castshadow)
 901                                                 continue;
 902                                         insidebox = BoxInsideBox(surface->mins, surface->maxs, info->lightmins, info->lightmaxs);
 903                                         for (triangleindex = 0, t = surface->num_firsttriangle, e = info->model->surfmesh.data_element3i + t * 3;triangleindex < surface->num_triangles;triangleindex++, t++, e += 3)
 904                                         {
 905                                                 v[0] = info->model->surfmesh.data_vertex3f + e[0] * 3;
 906                                                 v[1] = info->model->surfmesh.data_vertex3f + e[1] * 3;
 907                                                 v[2] = info->model->surfmesh.data_vertex3f + e[2] * 3;
 908                                                 VectorCopy(v[0], v2[0]);
 909                                                 VectorCopy(v[1], v2[1]);
 910                                                 VectorCopy(v[2], v2[2]);
 911                                                 if (insidebox || TriangleBBoxOverlapsBox(v2[0], v2[1], v2[2], info->lightmins, info->lightmaxs))
 912                                                         SVBSP_AddPolygon(&r_svbsp, 3, v2[0], true, NULL, NULL, 0);
 913                                         }
 914                                 }
 915                         }
 916                         else
 917                         {
 918                                 for (leafsurfaceindex = 0;leafsurfaceindex < numleafsurfaces;leafsurfaceindex++)
 919                                 {
 920                                         surfaceindex = leafsurfaceindices[leafsurfaceindex];
 921                                         if (CHECKPVSBIT(info->outsurfacepvs, surfaceindex))
 922                                                 continue;
 923                                         SETPVSBIT(info->outsurfacepvs, surfaceindex);
 924                                         surface = surfaces + surfaceindex;
 925                                         if (!BoxesOverlap(info->lightmins, info->lightmaxs, surface->mins, surface->maxs))
 926                                                 continue;
 927                                         addedtris = false;
 928                                         currentmaterialflags = R_GetCurrentTexture(surface->texture)->currentmaterialflags;
 929                                         castshadow = !(currentmaterialflags & MATERIALFLAG_NOSHADOW);
 930                                         insidebox = BoxInsideBox(surface->mins, surface->maxs, info->lightmins, info->lightmaxs);
 931                                         for (triangleindex = 0, t = surface->num_firsttriangle, e = info->model->surfmesh.data_element3i + t * 3;triangleindex < surface->num_triangles;triangleindex++, t++, e += 3)
 932                                         {
 933                                                 v[0] = info->model->surfmesh.data_vertex3f + e[0] * 3;
 934                                                 v[1] = info->model->surfmesh.data_vertex3f + e[1] * 3;
 935                                                 v[2] = info->model->surfmesh.data_vertex3f + e[2] * 3;
 936                                                 VectorCopy(v[0], v2[0]);
 937                                                 VectorCopy(v[1], v2[1]);
 938                                                 VectorCopy(v[2], v2[2]);
 939                                                 if (!insidebox && !TriangleBBoxOverlapsBox(v2[0], v2[1], v2[2], info->lightmins, info->lightmaxs))
 940                                                         continue;
 941                                                 if (svbspactive && !(SVBSP_AddPolygon(&r_svbsp, 3, v2[0], false, NULL, NULL, 0) & 2))
 942                                                         continue;
 943                                                 // we don't omit triangles from lighting even if they are
 944                                                 // backfacing, because when using shadowmapping they are often
 945                                                 // not fully occluded on the horizon of an edge
 946                                                 SETPVSBIT(info->outlighttrispvs, t);
 947                                                 addedtris = true;
 948                                                 if (castshadow)
 949                                                 {
 950                                                         if (noocclusion || (currentmaterialflags & MATERIALFLAG_NOCULLFACE))
 951                                                         {
 952                                                                 // if the material is double sided we
 953                                                                 // can't cull by direction
 954                                                                 SETPVSBIT(info->outshadowtrispvs, t);
 955                                                         }
 956                                                         else if (frontsidecasting)
 957                                                         {
 958                                                                 // front side casting occludes backfaces,
 959                                                                 // so they are completely useless as both
 960                                                                 // casters and lit polygons
 961                                                                 if (PointInfrontOfTriangle(info->relativelightorigin, v2[0], v2[1], v2[2]))
 962                                                                         SETPVSBIT(info->outshadowtrispvs, t);
 963                                                         }
 964                                                         else
 965                                                         {
 966                                                                 // back side casting does not occlude
 967                                                                 // anything so we can't cull lit polygons
 968                                                                 if (!PointInfrontOfTriangle(info->relativelightorigin, v2[0], v2[1], v2[2]))
 969                                                                         SETPVSBIT(info->outshadowtrispvs, t);
 970                                                         }
 971                                                 }
 972                                         }
 973                                         if (addedtris)
 974                                                 info->outsurfacelist[info->outnumsurfaces++] = surfaceindex;
 975                                 }
 976                         }
 977                 }
 978         }
 979 }
 980
 981 static void R_Q1BSP_RecursiveGetLightInfo_BIH(r_q1bsp_getlightinfo_t *info, const bih_t *bih)
 982 {
 983         bih_leaf_t *leaf;
 984         bih_node_t *node;
 985         int nodenum;
 986         int axis;
 987         int surfaceindex;
 988         int t;
 989         int nodeleafindex;
 990         int currentmaterialflags;
 991         qboolean castshadow;
 992         qboolean noocclusion = info->noocclusion;
 993         qboolean frontsidecasting = info->frontsidecasting;
 994         msurface_t *surface;
 995         const int *e;
 996         const vec_t *v[3];
 997         float v2[3][3];
 998         int nodestack[GETLIGHTINFO_MAXNODESTACK];
 999         int nodestackpos = 0;
1000         // note: because the BSP leafs are not in the BIH tree, the _BSP function
1001         // must be called to mark leafs visible for entity culling...
1002         // we start at the root node
1003         nodestack[nodestackpos++] = bih->rootnode;
1004         // we'll be done when the stack is empty
1005         while (nodestackpos)
1006         {
1007                 // pop one off the stack to process
1008                 nodenum = nodestack[--nodestackpos];
1009                 // node
1010                 node = bih->nodes + nodenum;
1011                 if (node->type == BIH_UNORDERED)
1012                 {
1013                         for (nodeleafindex = 0;nodeleafindex < BIH_MAXUNORDEREDCHILDREN && node->children[nodeleafindex] >= 0;nodeleafindex++)
1014                         {
1015                                 leaf = bih->leafs + node->children[nodeleafindex];
1016                                 if (leaf->type != BIH_RENDERTRIANGLE)
1017                                         continue;
1018 #if 1
1019                                 if (!BoxesOverlap(info->lightmins, info->lightmaxs, leaf->mins, leaf->maxs))
1020                                         continue;
1021 #endif
1022 #if 1
1023                                 if (!r_shadow_compilingrtlight && R_CullBoxCustomPlanes(leaf->mins, leaf->maxs, info->numfrustumplanes, info->frustumplanes))
1024                                         continue;
1025 #endif
1026                                 surfaceindex = leaf->surfaceindex;
1027                                 surface = info->model->data_surfaces + surfaceindex;
1028                                 currentmaterialflags = R_GetCurrentTexture(surface->texture)->currentmaterialflags;
1029                                 castshadow = !(currentmaterialflags & MATERIALFLAG_NOSHADOW);
1030                                 t = leaf->itemindex;
1031                                 e = info->model->surfmesh.data_element3i + t * 3;
1032                                 v[0] = info->model->surfmesh.data_vertex3f + e[0] * 3;
1033                                 v[1] = info->model->surfmesh.data_vertex3f + e[1] * 3;
1034                                 v[2] = info->model->surfmesh.data_vertex3f + e[2] * 3;
1035                                 VectorCopy(v[0], v2[0]);
1036                                 VectorCopy(v[1], v2[1]);
1037                                 VectorCopy(v[2], v2[2]);
1038                                 if (info->svbsp_insertoccluder)
1039                                 {
1040                                         if (castshadow)
1041                                                 SVBSP_AddPolygon(&r_svbsp, 3, v2[0], true, NULL, NULL, 0);
1042                                         continue;
1043                                 }
1044                                 if (info->svbsp_active && !(SVBSP_AddPolygon(&r_svbsp, 3, v2[0], false, NULL, NULL, 0) & 2))
1045                                         continue;
1046                                 // we don't occlude triangles from lighting even
1047                                 // if they are backfacing, because when using
1048                                 // shadowmapping they are often not fully occluded
1049                                 // on the horizon of an edge
1050                                 SETPVSBIT(info->outlighttrispvs, t);
1051                                 if (castshadow)
1052                                 {
1053                                         if (noocclusion || (currentmaterialflags & MATERIALFLAG_NOCULLFACE))
1054                                         {
1055                                                 // if the material is double sided we
1056                                                 // can't cull by direction
1057                                                 SETPVSBIT(info->outshadowtrispvs, t);
1058                                         }
1059                                         else if (frontsidecasting)
1060                                         {
1061                                                 // front side casting occludes backfaces,
1062                                                 // so they are completely useless as both
1063                                                 // casters and lit polygons
1064                                                 if (PointInfrontOfTriangle(info->relativelightorigin, v2[0], v2[1], v2[2]))
1065                                                         SETPVSBIT(info->outshadowtrispvs, t);
1066                                         }
1067                                         else
1068                                         {
1069                                                 // back side casting does not occlude
1070                                                 // anything so we can't cull lit polygons
1071                                                 if (!PointInfrontOfTriangle(info->relativelightorigin, v2[0], v2[1], v2[2]))
1072                                                         SETPVSBIT(info->outshadowtrispvs, t);
1073                                         }
1074                                 }
1075                                 if (!CHECKPVSBIT(info->outsurfacepvs, surfaceindex))
1076                                 {
1077                                         SETPVSBIT(info->outsurfacepvs, surfaceindex);
1078                                         info->outsurfacelist[info->outnumsurfaces++] = surfaceindex;
1079                                 }
1080                         }
1081                 }
1082                 else
1083                 {
1084                         axis = node->type - BIH_SPLITX;
1085 #if 0
1086                         if (!BoxesOverlap(info->lightmins, info->lightmaxs, node->mins, node->maxs))
1087                                 continue;
1088 #endif
1089 #if 0
1090                         if (!r_shadow_compilingrtlight && R_CullBoxCustomPlanes(node->mins, node->maxs, rtlight->cached_numfrustumplanes, rtlight->cached_frustumplanes))
1091                                 continue;
1092 #endif
1093                         if (info->lightmins[axis] <= node->backmax)
1094                         {
1095                                 if (info->lightmaxs[axis] >= node->frontmin && nodestackpos < GETLIGHTINFO_MAXNODESTACK-1)
1096                                         nodestack[nodestackpos++] = node->front;
1097                                 nodestack[nodestackpos++] = node->back;
1098                                 continue;
1099                         }
1100                         else if (info->lightmaxs[axis] >= node->frontmin)
1101                         {
1102                                 nodestack[nodestackpos++] = node->front;
1103                                 continue;
1104                         }
1105                         else
1106                                 continue; // light falls between children, nothing here
1107                 }
1108         }
1109 }
1110
1111 static void R_Q1BSP_CallRecursiveGetLightInfo(r_q1bsp_getlightinfo_t *info, qboolean use_svbsp)
1112 {
1113         extern cvar_t r_shadow_usebihculling;
1114         if (use_svbsp)
1115         {
1116                 float origin[3];
1117                 VectorCopy(info->relativelightorigin, origin);
1118                 r_svbsp.maxnodes = max(r_svbsp.maxnodes, 1<<12);
1119                 r_svbsp.nodes = (svbsp_node_t*) R_FrameData_Alloc(r_svbsp.maxnodes * sizeof(svbsp_node_t));
1120                 info->svbsp_active = true;
1121                 info->svbsp_insertoccluder = true;
1122                 for (;;)
1123                 {
1124                         SVBSP_Init(&r_svbsp, origin, r_svbsp.maxnodes, r_svbsp.nodes);
1125                         R_Q1BSP_RecursiveGetLightInfo_BSP(info, false);
1126                         // if that failed, retry with more nodes
1127                         if (r_svbsp.ranoutofnodes)
1128                         {
1129                                 // an upper limit is imposed
1130                                 if (r_svbsp.maxnodes >= 2<<22)
1131                                         break;
1132                                 r_svbsp.maxnodes *= 2;
1133                                 r_svbsp.nodes = (svbsp_node_t*) R_FrameData_Alloc(r_svbsp.maxnodes * sizeof(svbsp_node_t));
1134                                 //Mem_Free(r_svbsp.nodes);
1135                                 //r_svbsp.nodes = (svbsp_node_t*) Mem_Alloc(tempmempool, r_svbsp.maxnodes * sizeof(svbsp_node_t));
1136                         }
1137                         else
1138                                 break;
1139                 }
1140                 // now clear the visibility arrays because we need to redo it
1141                 info->outnumleafs = 0;
1142                 info->outnumsurfaces = 0;
1143                 memset(info->outleafpvs, 0, (info->model->brush.num_leafs + 7) >> 3);
1144                 memset(info->outsurfacepvs, 0, (info->model->nummodelsurfaces + 7) >> 3);
1145                 memset(info->outshadowtrispvs, 0, (info->model->surfmesh.num_triangles + 7) >> 3);
1146                 memset(info->outlighttrispvs, 0, (info->model->surfmesh.num_triangles + 7) >> 3);
1147         }
1148         else
1149                 info->svbsp_active = false;
1150
1151         // we HAVE to mark the leaf the light is in as lit, because portals are
1152         // irrelevant to a leaf that the light source is inside of
1153         // (and they are all facing away, too)
1154         {
1155                 mnode_t *node = info->model->brush.data_nodes;
1156                 mleaf_t *leaf;
1157                 while (node->plane)
1158                         node = node->children[(node->plane->type < 3 ? info->relativelightorigin[node->plane->type] : DotProduct(info->relativelightorigin,node->plane->normal)) < node->plane->dist];
1159                 leaf = (mleaf_t *)node;
1160                 info->outmins[0] = min(info->outmins[0], leaf->mins[0]);
1161                 info->outmins[1] = min(info->outmins[1], leaf->mins[1]);
1162                 info->outmins[2] = min(info->outmins[2], leaf->mins[2]);
1163                 info->outmaxs[0] = max(info->outmaxs[0], leaf->maxs[0]);
1164                 info->outmaxs[1] = max(info->outmaxs[1], leaf->maxs[1]);
1165                 info->outmaxs[2] = max(info->outmaxs[2], leaf->maxs[2]);
1166                 if (info->outleafpvs)
1167                 {
1168                         int leafindex = leaf - info->model->brush.data_leafs;
1169                         if (!CHECKPVSBIT(info->outleafpvs, leafindex))
1170                         {
1171                                 SETPVSBIT(info->outleafpvs, leafindex);
1172                                 info->outleaflist[info->outnumleafs++] = leafindex;
1173                         }
1174                 }
1175         }
1176
1177         info->svbsp_insertoccluder = false;
1178         // 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
1179         if (r_shadow_usebihculling.integer > 0 && (r_shadow_usebihculling.integer == 2 || info->model->brush.num_leafs == 1) && info->model->render_bih.leafs != NULL)
1180         {
1181                 R_Q1BSP_RecursiveGetLightInfo_BSP(info, true);
1182                 R_Q1BSP_RecursiveGetLightInfo_BIH(info, &info->model->render_bih);
1183         }
1184         else
1185                 R_Q1BSP_RecursiveGetLightInfo_BSP(info, false);
1186         // we're using temporary framedata memory, so this pointer will be invalid soon, clear it
1187         r_svbsp.nodes = NULL;
1188         if (developer_extra.integer && use_svbsp)
1189         {
1190                 Con_DPrintf("GetLightInfo: svbsp built with %i nodes, polygon stats:\n", r_svbsp.numnodes);
1191                 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);
1192                 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);
1193         }
1194 }
1195
1196 static msurface_t *r_q1bsp_getlightinfo_surfaces;
1197
1198 static int R_Q1BSP_GetLightInfo_comparefunc(const void *ap, const void *bp)
1199 {
1200         int a = *(int*)ap;
1201         int b = *(int*)bp;
1202         const msurface_t *as = r_q1bsp_getlightinfo_surfaces + a;
1203         const msurface_t *bs = r_q1bsp_getlightinfo_surfaces + b;
1204         if (as->texture < bs->texture)
1205                 return -1;
1206         if (as->texture > bs->texture)
1207                 return 1;
1208         return a - b;
1209 }
1210
1211 extern cvar_t r_shadow_sortsurfaces;
1212
1213 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, qboolean noocclusion)
1214 {
1215         r_q1bsp_getlightinfo_t info;
1216         info.frontsidecasting = r_shadow_frontsidecasting.integer != 0;
1217         info.noocclusion = noocclusion || !info.frontsidecasting;
1218         VectorCopy(relativelightorigin, info.relativelightorigin);
1219         info.lightradius = lightradius;
1220         info.lightmins[0] = info.relativelightorigin[0] - info.lightradius;
1221         info.lightmins[1] = info.relativelightorigin[1] - info.lightradius;
1222         info.lightmins[2] = info.relativelightorigin[2] - info.lightradius;
1223         info.lightmaxs[0] = info.relativelightorigin[0] + info.lightradius;
1224         info.lightmaxs[1] = info.relativelightorigin[1] + info.lightradius;
1225         info.lightmaxs[2] = info.relativelightorigin[2] + info.lightradius;
1226         if (ent->model == NULL)
1227         {
1228                 VectorCopy(info.lightmins, outmins);
1229                 VectorCopy(info.lightmaxs, outmaxs);
1230                 *outnumleafspointer = 0;
1231                 *outnumsurfacespointer = 0;
1232                 return;
1233         }
1234         info.model = ent->model;
1235         info.outleaflist = outleaflist;
1236         info.outleafpvs = outleafpvs;
1237         info.outnumleafs = 0;
1238         info.visitingleafpvs = visitingleafpvs;
1239         info.outsurfacelist = outsurfacelist;
1240         info.outsurfacepvs = outsurfacepvs;
1241         info.outshadowtrispvs = outshadowtrispvs;
1242         info.outlighttrispvs = outlighttrispvs;
1243         info.outnumsurfaces = 0;
1244         info.numfrustumplanes = numfrustumplanes;
1245         info.frustumplanes = frustumplanes;
1246         VectorCopy(info.relativelightorigin, info.outmins);
1247         VectorCopy(info.relativelightorigin, info.outmaxs);
1248         memset(visitingleafpvs, 0, (info.model->brush.num_leafs + 7) >> 3);
1249         memset(outleafpvs, 0, (info.model->brush.num_leafs + 7) >> 3);
1250         memset(outsurfacepvs, 0, (info.model->nummodelsurfaces + 7) >> 3);
1251         memset(outshadowtrispvs, 0, (info.model->surfmesh.num_triangles + 7) >> 3);
1252         memset(outlighttrispvs, 0, (info.model->surfmesh.num_triangles + 7) >> 3);
1253         if (info.model->brush.GetPVS && !info.noocclusion)
1254                 info.pvs = info.model->brush.GetPVS(info.model, info.relativelightorigin);
1255         else
1256                 info.pvs = NULL;
1257         RSurf_ActiveModelEntity(r_refdef.scene.worldentity, false, false, false);
1258
1259         if (!info.noocclusion && r_shadow_compilingrtlight && r_shadow_realtime_world_compileportalculling.integer && info.model->brush.data_portals)
1260         {
1261                 // use portal recursion for exact light volume culling, and exact surface checking
1262                 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);
1263         }
1264         else if (!info.noocclusion && r_shadow_realtime_dlight_portalculling.integer && info.model->brush.data_portals)
1265         {
1266                 // use portal recursion for exact light volume culling, but not the expensive exact surface checking
1267                 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);
1268         }
1269         else
1270         {
1271                 // recurse the bsp tree, checking leafs and surfaces for visibility
1272                 // optionally using svbsp for exact culling of compiled lights
1273                 // (or if the user enables dlight svbsp culling, which is mostly for
1274                 //  debugging not actual use)
1275                 R_Q1BSP_CallRecursiveGetLightInfo(&info, !info.noocclusion && (r_shadow_compilingrtlight ? r_shadow_realtime_world_compilesvbsp.integer : r_shadow_realtime_dlight_svbspculling.integer) != 0);
1276         }
1277
1278         rsurface.entity = NULL; // used only by R_GetCurrentTexture and RSurf_ActiveModelEntity
1279
1280         // limit combined leaf box to light boundaries
1281         outmins[0] = max(info.outmins[0] - 1, info.lightmins[0]);
1282         outmins[1] = max(info.outmins[1] - 1, info.lightmins[1]);
1283         outmins[2] = max(info.outmins[2] - 1, info.lightmins[2]);
1284         outmaxs[0] = min(info.outmaxs[0] + 1, info.lightmaxs[0]);
1285         outmaxs[1] = min(info.outmaxs[1] + 1, info.lightmaxs[1]);
1286         outmaxs[2] = min(info.outmaxs[2] + 1, info.lightmaxs[2]);
1287
1288         *outnumleafspointer = info.outnumleafs;
1289         *outnumsurfacespointer = info.outnumsurfaces;
1290
1291         // now sort surfaces by texture for faster rendering
1292         r_q1bsp_getlightinfo_surfaces = info.model->data_surfaces;
1293         if (r_shadow_sortsurfaces.integer)
1294                 qsort(info.outsurfacelist, info.outnumsurfaces, sizeof(*info.outsurfacelist), R_Q1BSP_GetLightInfo_comparefunc);
1295 }
1296
1297 void R_Q1BSP_CompileShadowMap(entity_render_t *ent, vec3_t relativelightorigin, vec3_t relativelightdirection, float lightradius, int numsurfaces, const int *surfacelist)
1298 {
1299         dp_model_t *model = ent->model;
1300         msurface_t *surface;
1301         int surfacelistindex;
1302         int sidetotals[6] = { 0, 0, 0, 0, 0, 0 }, sidemasks = 0;
1303         int i;
1304         // FIXME: the sidetotals code incorrectly assumes that static_meshchain is
1305         // a single mesh - to prevent that from crashing (sideoffsets, sidetotals
1306         // exceeding the number of triangles in a single mesh) we have to make sure
1307         // that we make only a single mesh - so over-estimate the size of the mesh
1308         // to match the model.
1309         r_shadow_compilingrtlight->static_meshchain_shadow_shadowmap = Mod_ShadowMesh_Begin(r_main_mempool, model->surfmesh.num_vertices, model->surfmesh.num_triangles);
1310         R_Shadow_PrepareShadowSides(model->surfmesh.num_triangles);
1311         for (surfacelistindex = 0;surfacelistindex < numsurfaces;surfacelistindex++)
1312         {
1313                 surface = model->data_surfaces + surfacelist[surfacelistindex];
1314                 sidemasks |= R_Shadow_ChooseSidesFromBox(surface->num_firsttriangle, surface->num_triangles, model->surfmesh.data_vertex3f, model->surfmesh.data_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);
1315         }
1316         R_Shadow_ShadowMapFromList(model->surfmesh.num_vertices, model->surfmesh.num_triangles, model->surfmesh.data_vertex3f, model->surfmesh.data_element3i, numshadowsides, sidetotals, shadowsides, shadowsideslist);
1317         r_shadow_compilingrtlight->static_meshchain_shadow_shadowmap = Mod_ShadowMesh_Finish(r_shadow_compilingrtlight->static_meshchain_shadow_shadowmap, true);
1318         r_shadow_compilingrtlight->static_shadowmap_receivers &= sidemasks;
1319         for(i = 0;i<6;i++)
1320                 if(!sidetotals[i])
1321                         r_shadow_compilingrtlight->static_shadowmap_casters &= ~(1 << i);
1322 }
1323
1324 #define RSURF_MAX_BATCHSURFACES 8192
1325
1326 static const msurface_t *batchsurfacelist[RSURF_MAX_BATCHSURFACES];
1327
1328 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)
1329 {
1330         dp_model_t *model = ent->model;
1331         const msurface_t *surface;
1332         int modelsurfacelistindex, batchnumsurfaces;
1333         // check the box in modelspace, it was already checked in worldspace
1334         if (!BoxesOverlap(model->normalmins, model->normalmaxs, lightmins, lightmaxs))
1335                 return;
1336         R_FrameData_SetMark();
1337         // identify lit faces within the bounding box
1338         for (modelsurfacelistindex = 0;modelsurfacelistindex < modelnumsurfaces;modelsurfacelistindex++)
1339         {
1340                 surface = model->data_surfaces + modelsurfacelist[modelsurfacelistindex];
1341                 if (surfacesides && !(surfacesides[modelsurfacelistindex] && (1 << side)))
1342                         continue;
1343                 rsurface.texture = R_GetCurrentTexture(surface->texture);
1344                 if (rsurface.texture->currentmaterialflags & MATERIALFLAG_NOSHADOW)
1345                         continue;
1346                 if (!BoxesOverlap(lightmins, lightmaxs, surface->mins, surface->maxs))
1347                         continue;
1348                 r_refdef.stats[r_stat_lights_dynamicshadowtriangles] += surface->num_triangles;
1349                 r_refdef.stats[r_stat_lights_shadowtriangles] += surface->num_triangles;
1350                 batchsurfacelist[0] = surface;
1351                 batchnumsurfaces = 1;
1352                 while(++modelsurfacelistindex < modelnumsurfaces && batchnumsurfaces < RSURF_MAX_BATCHSURFACES)
1353                 {
1354                         surface = model->data_surfaces + modelsurfacelist[modelsurfacelistindex];
1355                         if (surfacesides && !(surfacesides[modelsurfacelistindex] & (1 << side)))
1356                                 continue;
1357                         if (surface->texture != batchsurfacelist[0]->texture)
1358                                 break;
1359                         if (!BoxesOverlap(lightmins, lightmaxs, surface->mins, surface->maxs))
1360                                 continue;
1361                         r_refdef.stats[r_stat_lights_dynamicshadowtriangles] += surface->num_triangles;
1362                         r_refdef.stats[r_stat_lights_shadowtriangles] += surface->num_triangles;
1363                         batchsurfacelist[batchnumsurfaces++] = surface;
1364                 }
1365                 --modelsurfacelistindex;
1366                 GL_CullFace(rsurface.texture->currentmaterialflags & MATERIALFLAG_NOCULLFACE ? GL_NONE : r_refdef.view.cullface_back);
1367                 RSurf_PrepareVerticesForBatch(BATCHNEED_ARRAY_VERTEX | BATCHNEED_ALLOWMULTIDRAW, batchnumsurfaces, batchsurfacelist);
1368                 R_Mesh_PrepareVertices_Vertex3f(rsurface.batchnumvertices, rsurface.batchvertex3f, rsurface.batchvertex3f_vertexbuffer, rsurface.batchvertex3f_bufferoffset);
1369                 RSurf_DrawBatch();
1370         }
1371         R_FrameData_ReturnToMark();
1372 }
1373
1374 #define BATCHSIZE 1024
1375
1376 static void R_Q1BSP_DrawLight_TransparentCallback(const entity_render_t *ent, const rtlight_t *rtlight, int numsurfaces, int *surfacelist)
1377 {
1378         int i, j, endsurface;
1379         texture_t *t;
1380         const msurface_t *surface;
1381         R_FrameData_SetMark();
1382         // note: in practice this never actually receives batches
1383         R_Shadow_RenderMode_Begin();
1384         R_Shadow_RenderMode_ActiveLight(rtlight);
1385         R_Shadow_RenderMode_Lighting(true, rtlight->shadowmapatlassidesize != 0, (ent->flags & RENDER_NOSELFSHADOW) != 0);
1386         R_Shadow_SetupEntityLight(ent);
1387         for (i = 0;i < numsurfaces;i = j)
1388         {
1389                 j = i + 1;
1390                 surface = rsurface.modelsurfaces + surfacelist[i];
1391                 t = surface->texture;
1392                 rsurface.texture = R_GetCurrentTexture(t);
1393                 endsurface = min(j + BATCHSIZE, numsurfaces);
1394                 for (j = i;j < endsurface;j++)
1395                 {
1396                         surface = rsurface.modelsurfaces + surfacelist[j];
1397                         if (t != surface->texture)
1398                                 break;
1399                         R_Shadow_RenderLighting(1, &surface);
1400                 }
1401         }
1402         R_Shadow_RenderMode_End();
1403         R_FrameData_ReturnToMark();
1404 }
1405
1406 extern qboolean r_shadow_usingdeferredprepass;
1407 void R_Q1BSP_DrawLight(entity_render_t *ent, int numsurfaces, const int *surfacelist, const unsigned char *lighttrispvs)
1408 {
1409         dp_model_t *model = ent->model;
1410         const msurface_t *surface;
1411         int i, k, kend, l, endsurface, batchnumsurfaces, texturenumsurfaces;
1412         const msurface_t **texturesurfacelist;
1413         texture_t *tex;
1414         CHECKGLERROR
1415         R_FrameData_SetMark();
1416         // this is a double loop because non-visible surface skipping has to be
1417         // fast, and even if this is not the world model (and hence no visibility
1418         // checking) the input surface list and batch buffer are different formats
1419         // so some processing is necessary.  (luckily models have few surfaces)
1420         for (i = 0;i < numsurfaces;)
1421         {
1422                 batchnumsurfaces = 0;
1423                 endsurface = min(i + RSURF_MAX_BATCHSURFACES, numsurfaces);
1424                 if (ent == r_refdef.scene.worldentity)
1425                 {
1426                         for (;i < endsurface;i++)
1427                                 if (r_refdef.viewcache.world_surfacevisible[surfacelist[i]])
1428                                         batchsurfacelist[batchnumsurfaces++] = model->data_surfaces + surfacelist[i];
1429                 }
1430                 else
1431                 {
1432                         for (;i < endsurface;i++)
1433                                 batchsurfacelist[batchnumsurfaces++] = model->data_surfaces + surfacelist[i];
1434                 }
1435                 if (!batchnumsurfaces)
1436                         continue;
1437                 for (k = 0;k < batchnumsurfaces;k = kend)
1438                 {
1439                         surface = batchsurfacelist[k];
1440                         tex = surface->texture;
1441                         rsurface.texture = R_GetCurrentTexture(tex);
1442                         // gather surfaces into a batch range
1443                         for (kend = k;kend < batchnumsurfaces && tex == batchsurfacelist[kend]->texture;kend++)
1444                                 ;
1445                         // now figure out what to do with this particular range of surfaces
1446                         // VorteX: added MATERIALFLAG_NORTLIGHT
1447                         if ((rsurface.texture->currentmaterialflags & (MATERIALFLAG_WALL | MATERIALFLAG_NORTLIGHT)) != MATERIALFLAG_WALL)
1448                                 continue;
1449                         if (r_fb.water.renderingscene && (rsurface.texture->currentmaterialflags & (MATERIALFLAG_WATERSHADER | MATERIALFLAG_REFRACTION | MATERIALFLAG_REFLECTION | MATERIALFLAG_CAMERA)))
1450                                 continue;
1451                         if (rsurface.texture->currentmaterialflags & MATERIALFLAGMASK_DEPTHSORTED)
1452                         {
1453                                 vec3_t tempcenter, center;
1454                                 for (l = k;l < kend;l++)
1455                                 {
1456                                         surface = batchsurfacelist[l];
1457                                         if (r_transparent_sortsurfacesbynearest.integer)
1458                                         {
1459                                                 tempcenter[0] = bound(surface->mins[0], rsurface.localvieworigin[0], surface->maxs[0]);
1460                                                 tempcenter[1] = bound(surface->mins[1], rsurface.localvieworigin[1], surface->maxs[1]);
1461                                                 tempcenter[2] = bound(surface->mins[2], rsurface.localvieworigin[2], surface->maxs[2]);
1462                                         }
1463                                         else
1464                                         {
1465                                                 tempcenter[0] = (surface->mins[0] + surface->maxs[0]) * 0.5f;
1466                                                 tempcenter[1] = (surface->mins[1] + surface->maxs[1]) * 0.5f;
1467                                                 tempcenter[2] = (surface->mins[2] + surface->maxs[2]) * 0.5f;
1468                                         }
1469                                         Matrix4x4_Transform(&rsurface.matrix, tempcenter, center);
1470                                         if (ent->transparent_offset) // transparent offset
1471                                         {
1472                                                 center[0] += r_refdef.view.forward[0]*ent->transparent_offset;
1473                                                 center[1] += r_refdef.view.forward[1]*ent->transparent_offset;
1474                                                 center[2] += r_refdef.view.forward[2]*ent->transparent_offset;
1475                                         }
1476                                         R_MeshQueue_AddTransparent((rsurface.entity->flags & RENDER_WORLDOBJECT) ? TRANSPARENTSORT_SKY : ((rsurface.texture->currentmaterialflags & MATERIALFLAG_NODEPTHTEST) ? TRANSPARENTSORT_HUD : rsurface.texture->transparentsort), center, R_Q1BSP_DrawLight_TransparentCallback, ent, surface - rsurface.modelsurfaces, rsurface.rtlight);
1477                                 }
1478                                 continue;
1479                         }
1480                         if (r_shadow_usingdeferredprepass)
1481                                 continue;
1482                         texturenumsurfaces = kend - k;
1483                         texturesurfacelist = batchsurfacelist + k;
1484                         R_Shadow_RenderLighting(texturenumsurfaces, texturesurfacelist);
1485                 }
1486         }
1487         R_FrameData_ReturnToMark();
1488 }
1489
1490 //Made by [515]
1491 static void R_ReplaceWorldTexture (void)
1492 {
1493         dp_model_t              *m;
1494         texture_t       *t;
1495         int                     i;
1496         const char      *r, *newt;
1497         skinframe_t *skinframe;
1498         if (!r_refdef.scene.worldmodel)
1499         {
1500                 Con_Printf("There is no worldmodel\n");
1501                 return;
1502         }
1503         m = r_refdef.scene.worldmodel;
1504
1505         if(Cmd_Argc() < 2)
1506         {
1507                 Con_Print("r_replacemaptexture <texname> <newtexname> - replaces texture\n");
1508                 Con_Print("r_replacemaptexture <texname> - switch back to default texture\n");
1509                 return;
1510         }
1511         if(!cl.islocalgame || !cl.worldmodel)
1512         {
1513                 Con_Print("This command works only in singleplayer\n");
1514                 return;
1515         }
1516         r = Cmd_Argv(1);
1517         newt = Cmd_Argv(2);
1518         if(!newt[0])
1519                 newt = r;
1520         for(i=0,t=m->data_textures;i<m->num_textures;i++,t++)
1521         {
1522                 if(/*t->width && !strcasecmp(t->name, r)*/ matchpattern( t->name, r, true ) )
1523                 {
1524                         if ((skinframe = R_SkinFrame_LoadExternal(newt, TEXF_MIPMAP | TEXF_ALPHA | TEXF_PICMIP, true, false)))
1525                         {
1526 //                              t->skinframes[0] = skinframe;
1527                                 t->currentskinframe = skinframe;
1528                                 Con_Printf("%s replaced with %s\n", r, newt);
1529                         }
1530                         else
1531                         {
1532                                 Con_Printf("%s was not found\n", newt);
1533                                 return;
1534                         }
1535                 }
1536         }
1537 }
1538
1539 //Made by [515]
1540 static void R_ListWorldTextures (void)
1541 {
1542         dp_model_t              *m;
1543         texture_t       *t;
1544         int                     i;
1545         if (!r_refdef.scene.worldmodel)
1546         {
1547                 Con_Printf("There is no worldmodel\n");
1548                 return;
1549         }
1550         m = r_refdef.scene.worldmodel;
1551
1552         Con_Print("Worldmodel textures :\n");
1553         for(i=0,t=m->data_textures;i<m->num_textures;i++,t++)
1554                 if (t->name[0] && strcasecmp(t->name, "NO TEXTURE FOUND"))
1555                         Con_Printf("%s\n", t->name);
1556 }
1557
1558 #if 0
1559 static void gl_surf_start(void)
1560 {
1561 }
1562
1563 static void gl_surf_shutdown(void)
1564 {
1565 }
1566
1567 static void gl_surf_newmap(void)
1568 {
1569 }
1570 #endif
1571
1572 void GL_Surf_Init(void)
1573 {
1574
1575         Cvar_RegisterVariable(&r_ambient);
1576         Cvar_RegisterVariable(&r_lockpvs);
1577         Cvar_RegisterVariable(&r_lockvisibility);
1578         Cvar_RegisterVariable(&r_useportalculling);
1579         Cvar_RegisterVariable(&r_usesurfaceculling);
1580         Cvar_RegisterVariable(&r_vis_trace);
1581         Cvar_RegisterVariable(&r_vis_trace_samples);
1582         Cvar_RegisterVariable(&r_vis_trace_delay);
1583         Cvar_RegisterVariable(&r_vis_trace_eyejitter);
1584         Cvar_RegisterVariable(&r_vis_trace_enlarge);
1585         Cvar_RegisterVariable(&r_vis_trace_expand);
1586         Cvar_RegisterVariable(&r_vis_trace_pad);
1587         Cvar_RegisterVariable(&r_vis_trace_surfaces);
1588         Cvar_RegisterVariable(&r_q3bsp_renderskydepth);
1589
1590         Cmd_AddCommand ("r_replacemaptexture", R_ReplaceWorldTexture, "override a map texture for testing purposes");
1591         Cmd_AddCommand ("r_listmaptextures", R_ListWorldTextures, "list all textures used by the current map");
1592
1593         //R_RegisterModule("GL_Surf", gl_surf_start, gl_surf_shutdown, gl_surf_newmap);
1594 }
1595