gl_rsurf.c

   1 /*
   2 Copyright (C) 1996-1997 Id Software, Inc.
   3
   4 This program is free software; you can redistribute it and/or
   5 modify it under the terms of the GNU General Public License
   6 as published by the Free Software Foundation; either version 2
   7 of the License, or (at your option) any later version.
   8
   9 This program is distributed in the hope that it will be useful,
  10 but WITHOUT ANY WARRANTY; without even the implied warranty of
  11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
  12
  13 See the GNU General Public License for more details.
  14
  15 You should have received a copy of the GNU General Public License
  16 along with this program; if not, write to the Free Software
  17 Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
  18
  19 */
  20 // r_surf.c: surface-related refresh code
  21
  22 #include "quakedef.h"
  23 #include "r_shadow.h"
  24 #include "portals.h"
  25
  26 #define MAX_LIGHTMAP_SIZE 256
  27
  28 cvar_t r_ambient = {0, "r_ambient", "0", "brighter world cheat (not allowed in multiplayer), value is 0-128"};
  29 cvar_t r_lockpvs = {0, "r_lockpvs", "0", "disables pvs switching, allows you to walk around and inspect what is visible from a given location in the map (anything not visible from your current location will not be drawn)"};
  30 cvar_t r_lockvisibility = {0, "r_lockvisibility", "0", "disables visibility updates, allows you to walk around and inspect what is visible from a given viewpoint in the map (anything offscreen at the moment this is enabled will not be drawn)"};
  31 cvar_t r_useportalculling = {0, "r_useportalculling", "1", "use advanced portal culling visibility method to improve performance over just Potentially Visible Set, provides an even more significant speed improvement in unvised maps"};
  32 cvar_t r_q3bsp_renderskydepth = {0, "r_q3bsp_renderskydepth", "0", "draws sky depth masking in q3 maps (as in q1 maps), this means for example that sky polygons can hide other things"};
  33
  34 /*
  35 ===============
  36 R_BuildLightMap
  37
  38 Combine and scale multiple lightmaps into the 8.8 format in blocklights
  39 ===============
  40 */
  41 void R_BuildLightMap (const entity_render_t *ent, msurface_t *surface)
  42 {
  43         int smax, tmax, i, size, size3, maps, l;
  44         int *bl, scale;
  45         unsigned char *lightmap, *out, *stain;
  46         model_t *model = ent->model;
  47         static int intblocklights[MAX_LIGHTMAP_SIZE*MAX_LIGHTMAP_SIZE*3]; // LordHavoc: *3 for colored lighting
  48         static unsigned char templight[MAX_LIGHTMAP_SIZE*MAX_LIGHTMAP_SIZE*4];
  49
  50         // update cached lighting info
  51         surface->cached_dlight = 0;
  52
  53         smax = (surface->lightmapinfo->extents[0]>>4)+1;
  54         tmax = (surface->lightmapinfo->extents[1]>>4)+1;
  55         size = smax*tmax;
  56         size3 = size*3;
  57         lightmap = surface->lightmapinfo->samples;
  58
  59 // set to full bright if no light data
  60         bl = intblocklights;
  61         if (!model->brushq1.lightdata)
  62         {
  63                 for (i = 0;i < size3;i++)
  64                         bl[i] = 255*256;
  65         }
  66         else
  67         {
  68 // clear to no light
  69                 memset(bl, 0, size3*sizeof(*bl));
  70
  71 // add all the lightmaps
  72                 if (lightmap)
  73                         for (maps = 0;maps < MAXLIGHTMAPS && surface->lightmapinfo->styles[maps] != 255;maps++, lightmap += size3)
  74                                 for (scale = r_refdef.lightstylevalue[surface->lightmapinfo->styles[maps]], i = 0;i < size3;i++)
  75                                         bl[i] += lightmap[i] * scale;
  76         }
  77
  78         stain = surface->lightmapinfo->stainsamples;
  79         bl = intblocklights;
  80         out = templight;
  81         // the >> 16 shift adjusts down 8 bits to account for the stainmap
  82         // scaling, and remaps the 0-65536 (2x overbright) to 0-256, it will
  83         // be doubled during rendering to achieve 2x overbright
  84         // (0 = 0.0, 128 = 1.0, 256 = 2.0)
  85         if (model->brushq1.lightmaprgba)
  86         {
  87                 for (i = 0;i < size;i++)
  88                 {
  89                         l = (*bl++ * *stain++) >> 16;*out++ = min(l, 255);
  90                         l = (*bl++ * *stain++) >> 16;*out++ = min(l, 255);
  91                         l = (*bl++ * *stain++) >> 16;*out++ = min(l, 255);
  92                         *out++ = 255;
  93                 }
  94         }
  95         else
  96         {
  97                 for (i = 0;i < size;i++)
  98                 {
  99                         l = (*bl++ * *stain++) >> 16;*out++ = min(l, 255);
 100                         l = (*bl++ * *stain++) >> 16;*out++ = min(l, 255);
 101                         l = (*bl++ * *stain++) >> 16;*out++ = min(l, 255);
 102                 }
 103         }
 104
 105         R_UpdateTexture(surface->lightmaptexture, templight, surface->lightmapinfo->lightmaporigin[0], surface->lightmapinfo->lightmaporigin[1], smax, tmax);
 106
 107         // update the surface's deluxemap if it has one
 108         if (surface->deluxemaptexture != r_texture_blanknormalmap)
 109         {
 110                 vec3_t n;
 111                 unsigned char *normalmap = surface->lightmapinfo->nmapsamples;
 112                 lightmap = surface->lightmapinfo->samples;
 113                 // clear to no normalmap
 114                 bl = intblocklights;
 115                 memset(bl, 0, size3*sizeof(*bl));
 116                 // add all the normalmaps
 117                 if (lightmap && normalmap)
 118                 {
 119                         for (maps = 0;maps < MAXLIGHTMAPS && surface->lightmapinfo->styles[maps] != 255;maps++, lightmap += size3, normalmap += size3)
 120                         {
 121                                 for (scale = r_refdef.lightstylevalue[surface->lightmapinfo->styles[maps]], i = 0;i < size;i++)
 122                                 {
 123                                         // add the normalmap with weighting proportional to the style's lightmap intensity
 124                                         l = (int)(VectorLength(lightmap + i*3) * scale);
 125                                         bl[i*3+0] += ((int)normalmap[i*3+0] - 128) * l;
 126                                         bl[i*3+1] += ((int)normalmap[i*3+1] - 128) * l;
 127                                         bl[i*3+2] += ((int)normalmap[i*3+2] - 128) * l;
 128                                 }
 129                         }
 130                 }
 131                 bl = intblocklights;
 132                 out = templight;
 133                 // we simply renormalize the weighted normals to get a valid deluxemap
 134                 if (model->brushq1.lightmaprgba)
 135                 {
 136                         for (i = 0;i < size;i++, bl += 3)
 137                         {
 138                                 VectorCopy(bl, n);
 139                                 VectorNormalize(n);
 140                                 l = (int)(n[0] * 128 + 128);*out++ = bound(0, l, 255);
 141                                 l = (int)(n[1] * 128 + 128);*out++ = bound(0, l, 255);
 142                                 l = (int)(n[2] * 128 + 128);*out++ = bound(0, l, 255);
 143                                 *out++ = 255;
 144                         }
 145                 }
 146                 else
 147                 {
 148                         for (i = 0;i < size;i++, bl += 3)
 149                         {
 150                                 VectorCopy(bl, n);
 151                                 VectorNormalize(n);
 152                                 l = (int)(n[0] * 128 + 128);*out++ = bound(0, l, 255);
 153                                 l = (int)(n[1] * 128 + 128);*out++ = bound(0, l, 255);
 154                                 l = (int)(n[2] * 128 + 128);*out++ = bound(0, l, 255);
 155                         }
 156                 }
 157                 R_UpdateTexture(surface->deluxemaptexture, templight, surface->lightmapinfo->lightmaporigin[0], surface->lightmapinfo->lightmaporigin[1], smax, tmax);
 158         }
 159 }
 160
 161 void R_StainNode (mnode_t *node, model_t *model, const vec3_t origin, float radius, const float fcolor[8])
 162 {
 163         float ndist, a, ratio, maxdist, maxdist2, maxdist3, invradius, sdtable[256], td, dist2;
 164         msurface_t *surface, *endsurface;
 165         int i, s, t, smax, tmax, smax3, impacts, impactt, stained;
 166         unsigned char *bl;
 167         vec3_t impact;
 168
 169         maxdist = radius * radius;
 170         invradius = 1.0f / radius;
 171
 172 loc0:
 173         if (!node->plane)
 174                 return;
 175         ndist = PlaneDiff(origin, node->plane);
 176         if (ndist > radius)
 177         {
 178                 node = node->children[0];
 179                 goto loc0;
 180         }
 181         if (ndist < -radius)
 182         {
 183                 node = node->children[1];
 184                 goto loc0;
 185         }
 186
 187         dist2 = ndist * ndist;
 188         maxdist3 = maxdist - dist2;
 189
 190         if (node->plane->type < 3)
 191         {
 192                 VectorCopy(origin, impact);
 193                 impact[node->plane->type] -= ndist;
 194         }
 195         else
 196         {
 197                 impact[0] = origin[0] - node->plane->normal[0] * ndist;
 198                 impact[1] = origin[1] - node->plane->normal[1] * ndist;
 199                 impact[2] = origin[2] - node->plane->normal[2] * ndist;
 200         }
 201
 202         for (surface = model->data_surfaces + node->firstsurface, endsurface = surface + node->numsurfaces;surface < endsurface;surface++)
 203         {
 204                 if (surface->lightmapinfo->stainsamples)
 205                 {
 206                         smax = (surface->lightmapinfo->extents[0] >> 4) + 1;
 207                         tmax = (surface->lightmapinfo->extents[1] >> 4) + 1;
 208
 209                         impacts = (int)(DotProduct (impact, surface->lightmapinfo->texinfo->vecs[0]) + surface->lightmapinfo->texinfo->vecs[0][3] - surface->lightmapinfo->texturemins[0]);
 210                         impactt = (int)(DotProduct (impact, surface->lightmapinfo->texinfo->vecs[1]) + surface->lightmapinfo->texinfo->vecs[1][3] - surface->lightmapinfo->texturemins[1]);
 211
 212                         s = bound(0, impacts, smax * 16) - impacts;
 213                         t = bound(0, impactt, tmax * 16) - impactt;
 214                         i = (int)(s * s + t * t + dist2);
 215                         if (i > maxdist)
 216                                 continue;
 217
 218                         // reduce calculations
 219                         for (s = 0, i = impacts; s < smax; s++, i -= 16)
 220                                 sdtable[s] = i * i + dist2;
 221
 222                         bl = surface->lightmapinfo->stainsamples;
 223                         smax3 = smax * 3;
 224                         stained = false;
 225
 226                         i = impactt;
 227                         for (t = 0;t < tmax;t++, i -= 16)
 228                         {
 229                                 td = i * i;
 230                                 // make sure some part of it is visible on this line
 231                                 if (td < maxdist3)
 232                                 {
 233                                         maxdist2 = maxdist - td;
 234                                         for (s = 0;s < smax;s++)
 235                                         {
 236                                                 if (sdtable[s] < maxdist2)
 237                                                 {
 238                                                         ratio = lhrandom(0.0f, 1.0f);
 239                                                         a = (fcolor[3] + ratio * fcolor[7]) * (1.0f - sqrt(sdtable[s] + td) * invradius);
 240                                                         if (a >= (1.0f / 64.0f))
 241                                                         {
 242                                                                 if (a > 1)
 243                                                                         a = 1;
 244                                                                 bl[0] = (unsigned char) ((float) bl[0] + a * ((fcolor[0] + ratio * fcolor[4]) - (float) bl[0]));
 245                                                                 bl[1] = (unsigned char) ((float) bl[1] + a * ((fcolor[1] + ratio * fcolor[5]) - (float) bl[1]));
 246                                                                 bl[2] = (unsigned char) ((float) bl[2] + a * ((fcolor[2] + ratio * fcolor[6]) - (float) bl[2]));
 247                                                                 stained = true;
 248                                                         }
 249                                                 }
 250                                                 bl += 3;
 251                                         }
 252                                 }
 253                                 else // skip line
 254                                         bl += smax3;
 255                         }
 256                         // force lightmap upload
 257                         if (stained)
 258                                 surface->cached_dlight = true;
 259                 }
 260         }
 261
 262         if (node->children[0]->plane)
 263         {
 264                 if (node->children[1]->plane)
 265                 {
 266                         R_StainNode(node->children[0], model, origin, radius, fcolor);
 267                         node = node->children[1];
 268                         goto loc0;
 269                 }
 270                 else
 271                 {
 272                         node = node->children[0];
 273                         goto loc0;
 274                 }
 275         }
 276         else if (node->children[1]->plane)
 277         {
 278                 node = node->children[1];
 279                 goto loc0;
 280         }
 281 }
 282
 283 void R_Stain (const vec3_t origin, float radius, int cr1, int cg1, int cb1, int ca1, int cr2, int cg2, int cb2, int ca2)
 284 {
 285         int n;
 286         float fcolor[8];
 287         entity_render_t *ent;
 288         model_t *model;
 289         vec3_t org;
 290         if (r_refdef.worldmodel == NULL || !r_refdef.worldmodel->brush.data_nodes || !r_refdef.worldmodel->brushq1.lightdata)
 291                 return;
 292         fcolor[0] = cr1;
 293         fcolor[1] = cg1;
 294         fcolor[2] = cb1;
 295         fcolor[3] = ca1 * (1.0f / 64.0f);
 296         fcolor[4] = cr2 - cr1;
 297         fcolor[5] = cg2 - cg1;
 298         fcolor[6] = cb2 - cb1;
 299         fcolor[7] = (ca2 - ca1) * (1.0f / 64.0f);
 300
 301         R_StainNode(r_refdef.worldmodel->brush.data_nodes + r_refdef.worldmodel->brushq1.hulls[0].firstclipnode, r_refdef.worldmodel, origin, radius, fcolor);
 302
 303         // look for embedded bmodels
 304         for (n = 0;n < cl.num_brushmodel_entities;n++)
 305         {
 306                 ent = &cl.entities[cl.brushmodel_entities[n]].render;
 307                 model = ent->model;
 308                 if (model && model->name[0] == '*')
 309                 {
 310                         if (model->brush.data_nodes)
 311                         {
 312                                 Matrix4x4_Transform(&ent->inversematrix, origin, org);
 313                                 R_StainNode(model->brush.data_nodes + model->brushq1.hulls[0].firstclipnode, model, org, radius, fcolor);
 314                         }
 315                 }
 316         }
 317 }
 318
 319
 320 /*
 321 =============================================================
 322
 323         BRUSH MODELS
 324
 325 =============================================================
 326 */
 327
 328 static void R_DrawPortal_Callback(const entity_render_t *ent, const rtlight_t *rtlight, int numsurfaces, int *surfacelist)
 329 {
 330         // due to the hacky nature of this function's parameters, this is never
 331         // called with a batch, so numsurfaces is always 1, and the surfacelist
 332         // contains only a leaf number for coloring purposes
 333         const mportal_t *portal = (mportal_t *)ent;
 334         int i, numpoints;
 335         float *v;
 336         float vertex3f[POLYGONELEMENTS_MAXPOINTS*3];
 337         CHECKGLERROR
 338         GL_BlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
 339         GL_DepthMask(false);
 340         GL_DepthTest(true);
 341         GL_CullFace(GL_NONE);
 342         R_Mesh_Matrix(&identitymatrix);
 343
 344         numpoints = min(portal->numpoints, POLYGONELEMENTS_MAXPOINTS);
 345
 346         R_Mesh_VertexPointer(vertex3f);
 347         R_Mesh_ColorPointer(NULL);
 348         R_Mesh_ResetTextureState();
 349
 350         i = surfacelist[0];
 351         GL_Color(((i & 0x0007) >> 0) * (1.0f / 7.0f) * r_view.colorscale,
 352                          ((i & 0x0038) >> 3) * (1.0f / 7.0f) * r_view.colorscale,
 353                          ((i & 0x01C0) >> 6) * (1.0f / 7.0f) * r_view.colorscale,
 354                          0.125f);
 355         for (i = 0, v = vertex3f;i < numpoints;i++, v += 3)
 356                 VectorCopy(portal->points[i].position, v);
 357         R_Mesh_Draw(0, numpoints, numpoints - 2, polygonelements);
 358 }
 359
 360 // LordHavoc: this is just a nice debugging tool, very slow
 361 void R_DrawPortals(void)
 362 {
 363         int i, leafnum;
 364         mportal_t *portal;
 365         float center[3], f;
 366         model_t *model = r_refdef.worldmodel;
 367         if (model == NULL)
 368                 return;
 369         for (leafnum = 0;leafnum < r_refdef.worldmodel->brush.num_leafs;leafnum++)
 370         {
 371                 if (r_viewcache.world_leafvisible[leafnum])
 372                 {
 373                         //for (portalnum = 0, portal = model->brush.data_portals;portalnum < model->brush.num_portals;portalnum++, portal++)
 374                         for (portal = r_refdef.worldmodel->brush.data_leafs[leafnum].portals;portal;portal = portal->next)
 375                         {
 376                                 if (portal->numpoints <= POLYGONELEMENTS_MAXPOINTS)
 377                                 if (!R_CullBox(portal->mins, portal->maxs))
 378                                 {
 379                                         VectorClear(center);
 380                                         for (i = 0;i < portal->numpoints;i++)
 381                                                 VectorAdd(center, portal->points[i].position, center);
 382                                         f = ixtable[portal->numpoints];
 383                                         VectorScale(center, f, center);
 384                                         R_MeshQueue_AddTransparent(center, R_DrawPortal_Callback, (entity_render_t *)portal, leafnum, r_shadow_rtlight);
 385                                 }
 386                         }
 387                 }
 388         }
 389 }
 390
 391 void R_View_WorldVisibility(void)
 392 {
 393         int i, j, *mark;
 394         mleaf_t *leaf;
 395         mleaf_t *viewleaf;
 396         model_t *model = r_refdef.worldmodel;
 397
 398         if (!model)
 399                 return;
 400
 401         // if possible find the leaf the view origin is in
 402         viewleaf = model->brush.PointInLeaf ? model->brush.PointInLeaf(model, r_view.origin) : NULL;
 403         // if possible fetch the visible cluster bits
 404         if (!r_lockpvs.integer && model->brush.FatPVS)
 405                 model->brush.FatPVS(model, r_view.origin, 2, r_viewcache.world_pvsbits, sizeof(r_viewcache.world_pvsbits));
 406
 407         if (!r_lockvisibility.integer)
 408         {
 409                 // clear the visible surface and leaf flags arrays
 410                 memset(r_viewcache.world_surfacevisible, 0, model->num_surfaces);
 411                 memset(r_viewcache.world_leafvisible, 0, model->brush.num_leafs);
 412
 413                 r_viewcache.world_novis = false;
 414
 415                 // if floating around in the void (no pvs data available, and no
 416                 // portals available), simply use all on-screen leafs.
 417                 if (!viewleaf || viewleaf->clusterindex < 0)
 418                 {
 419                         // no visibility method: (used when floating around in the void)
 420                         // simply cull each leaf to the frustum (view pyramid)
 421                         // similar to quake's RecursiveWorldNode but without cache misses
 422                         r_viewcache.world_novis = true;
 423                         for (j = 0, leaf = model->brush.data_leafs;j < model->brush.num_leafs;j++, leaf++)
 424                         {
 425                                 // if leaf is in current pvs and on the screen, mark its surfaces
 426                                 if (!R_CullBox(leaf->mins, leaf->maxs))
 427                                 {
 428                                         r_refdef.stats.world_leafs++;
 429                                         r_viewcache.world_leafvisible[j] = true;
 430                                         if (leaf->numleafsurfaces)
 431                                                 for (i = 0, mark = leaf->firstleafsurface;i < leaf->numleafsurfaces;i++, mark++)
 432                                                         r_viewcache.world_surfacevisible[*mark] = true;
 433                                 }
 434                         }
 435                 }
 436                 // if the user prefers to disable portal culling (testing?), simply
 437                 // use all on-screen leafs that are in the pvs.
 438                 else if (!r_useportalculling.integer)
 439                 {
 440                         // pvs method:
 441                         // simply check if each leaf is in the Potentially Visible Set,
 442                         // and cull to frustum (view pyramid)
 443                         // similar to quake's RecursiveWorldNode but without cache misses
 444                         for (j = 0, leaf = model->brush.data_leafs;j < model->brush.num_leafs;j++, leaf++)
 445                         {
 446                                 // if leaf is in current pvs and on the screen, mark its surfaces
 447                                 if (CHECKPVSBIT(r_viewcache.world_pvsbits, leaf->clusterindex) && !R_CullBox(leaf->mins, leaf->maxs))
 448                                 {
 449                                         r_refdef.stats.world_leafs++;
 450                                         r_viewcache.world_leafvisible[j] = true;
 451                                         if (leaf->numleafsurfaces)
 452                                                 for (i = 0, mark = leaf->firstleafsurface;i < leaf->numleafsurfaces;i++, mark++)
 453                                                         r_viewcache.world_surfacevisible[*mark] = true;
 454                                 }
 455                         }
 456                 }
 457                 // otherwise use a recursive portal flow, culling each portal to
 458                 // frustum and checking if the leaf the portal leads to is in the pvs
 459                 else
 460                 {
 461                         int leafstackpos;
 462                         mportal_t *p;
 463                         mleaf_t *leafstack[8192];
 464                         // simple-frustum portal method:
 465                         // follows portals leading outward from viewleaf, does not venture
 466                         // offscreen or into leafs that are not visible, faster than
 467                         // Quake's RecursiveWorldNode and vastly better in unvised maps,
 468                         // often culls some surfaces that pvs alone would miss
 469                         // (such as a room in pvs that is hidden behind a wall, but the
 470                         //  passage leading to the room is off-screen)
 471                         leafstack[0] = viewleaf;
 472                         leafstackpos = 1;
 473                         while (leafstackpos)
 474                         {
 475                                 r_refdef.stats.world_leafs++;
 476                                 leaf = leafstack[--leafstackpos];
 477                                 r_viewcache.world_leafvisible[leaf - model->brush.data_leafs] = true;
 478                                 // mark any surfaces bounding this leaf
 479                                 if (leaf->numleafsurfaces)
 480                                         for (i = 0, mark = leaf->firstleafsurface;i < leaf->numleafsurfaces;i++, mark++)
 481                                                 r_viewcache.world_surfacevisible[*mark] = true;
 482                                 // follow portals into other leafs
 483                                 // the checks are:
 484                                 // if viewer is behind portal (portal faces outward into the scene)
 485                                 // and the portal polygon's bounding box is on the screen
 486                                 // and the leaf has not been visited yet
 487                                 // and the leaf is visible in the pvs
 488                                 // (the first two checks won't cause as many cache misses as the leaf checks)
 489                                 for (p = leaf->portals;p;p = p->next)
 490                                 {
 491                                         r_refdef.stats.world_portals++;
 492                                         if (DotProduct(r_view.origin, p->plane.normal) < (p->plane.dist + 1)
 493                                          && !r_viewcache.world_leafvisible[p->past - model->brush.data_leafs]
 494                                          && CHECKPVSBIT(r_viewcache.world_pvsbits, p->past->clusterindex)
 495                                          && !R_CullBox(p->mins, p->maxs)
 496                                          && leafstackpos < (int)(sizeof(leafstack) / sizeof(leafstack[0])))
 497                                                 leafstack[leafstackpos++] = p->past;
 498                                 }
 499                         }
 500                 }
 501         }
 502 }
 503
 504 void R_Q1BSP_DrawSky(entity_render_t *ent)
 505 {
 506         if (ent->model == NULL)
 507                 return;
 508         if (ent == r_refdef.worldentity)
 509                 R_DrawWorldSurfaces(true);
 510         else
 511                 R_DrawModelSurfaces(ent, true);
 512 }
 513
 514 void R_Q1BSP_Draw(entity_render_t *ent)
 515 {
 516         model_t *model = ent->model;
 517         if (model == NULL)
 518                 return;
 519         if (ent == r_refdef.worldentity)
 520                 R_DrawWorldSurfaces(false);
 521         else
 522                 R_DrawModelSurfaces(ent, false);
 523 }
 524
 525 typedef struct r_q1bsp_getlightinfo_s
 526 {
 527         model_t *model;
 528         vec3_t relativelightorigin;
 529         float lightradius;
 530         int *outleaflist;
 531         unsigned char *outleafpvs;
 532         int outnumleafs;
 533         int *outsurfacelist;
 534         unsigned char *outsurfacepvs;
 535         unsigned char *tempsurfacepvs;
 536         int outnumsurfaces;
 537         vec3_t outmins;
 538         vec3_t outmaxs;
 539         vec3_t lightmins;
 540         vec3_t lightmaxs;
 541         const unsigned char *pvs;
 542         qboolean svbsp_active;
 543         qboolean svbsp_insertoccluder;
 544 }
 545 r_q1bsp_getlightinfo_t;
 546
 547 void R_Q1BSP_RecursiveGetLightInfo(r_q1bsp_getlightinfo_t *info, mnode_t *node)
 548 {
 549         int sides;
 550         mleaf_t *leaf;
 551         for (;;)
 552         {
 553                 mplane_t *plane = node->plane;
 554                 //if (!BoxesOverlap(info->lightmins, info->lightmaxs, node->mins, node->maxs))
 555                 //      return;
 556                 if (!plane)
 557                         break;
 558                 if (plane->type < 3)
 559                 {
 560                         if (info->lightmins[plane->type] > plane->dist)
 561                                 node = node->children[0];
 562                         else if (info->lightmaxs[plane->type] < plane->dist)
 563                                 node = node->children[1];
 564                         else if (info->relativelightorigin[plane->type] >= plane->dist)
 565                         {
 566                                 R_Q1BSP_RecursiveGetLightInfo(info, node->children[0]);
 567                                 node = node->children[1];
 568                         }
 569                         else
 570                         {
 571                                 R_Q1BSP_RecursiveGetLightInfo(info, node->children[1]);
 572                                 node = node->children[0];
 573                         }
 574                 }
 575                 else
 576                 {
 577                         sides = BoxOnPlaneSide(info->lightmins, info->lightmaxs, plane);
 578                         if (sides == 3)
 579                         {
 580                                 // recurse front side first because the svbsp building prefers it
 581                                 if (PlaneDist(info->relativelightorigin, plane) >= 0)
 582                                 {
 583                                         R_Q1BSP_RecursiveGetLightInfo(info, node->children[0]);
 584                                         node = node->children[1];
 585                                 }
 586                                 else
 587                                 {
 588                                         R_Q1BSP_RecursiveGetLightInfo(info, node->children[1]);
 589                                         node = node->children[0];
 590                                 }
 591                         }
 592                         else if (sides == 0)
 593                                 return; // ERROR: NAN bounding box!
 594                         else
 595                                 node = node->children[sides - 1];
 596                 }
 597         }
 598         leaf = (mleaf_t *)node;
 599         if (info->svbsp_active)
 600         {
 601                 int i;
 602                 mportal_t *portal;
 603                 double points[128][3];
 604                 for (portal = leaf->portals;portal;portal = portal->next)
 605                 {
 606                         for (i = 0;i < portal->numpoints;i++)
 607                                 VectorCopy(portal->points[i].position, points[i]);
 608                         if (SVBSP_AddPolygon(&r_svbsp, portal->numpoints, points[0], false, NULL, NULL, 0) & 2)
 609                                 break;
 610                 }
 611                 if (portal == NULL)
 612                         return; // no portals of this leaf visible
 613         }
 614         else
 615         {
 616                 if (r_shadow_frontsidecasting.integer && info->pvs != NULL && !CHECKPVSBIT(info->pvs, leaf->clusterindex))
 617                         return;
 618         }
 619         // inserting occluders does not alter the leaf info
 620         if (!info->svbsp_insertoccluder)
 621         {
 622                 info->outmins[0] = min(info->outmins[0], leaf->mins[0]);
 623                 info->outmins[1] = min(info->outmins[1], leaf->mins[1]);
 624                 info->outmins[2] = min(info->outmins[2], leaf->mins[2]);
 625                 info->outmaxs[0] = max(info->outmaxs[0], leaf->maxs[0]);
 626                 info->outmaxs[1] = max(info->outmaxs[1], leaf->maxs[1]);
 627                 info->outmaxs[2] = max(info->outmaxs[2], leaf->maxs[2]);
 628                 if (info->outleafpvs)
 629                 {
 630                         int leafindex = leaf - info->model->brush.data_leafs;
 631                         if (!CHECKPVSBIT(info->outleafpvs, leafindex))
 632                         {
 633                                 SETPVSBIT(info->outleafpvs, leafindex);
 634                                 info->outleaflist[info->outnumleafs++] = leafindex;
 635                         }
 636                 }
 637         }
 638         if (info->outsurfacepvs)
 639         {
 640                 int leafsurfaceindex;
 641                 int surfaceindex;
 642                 int triangleindex, t;
 643                 msurface_t *surface;
 644                 const int *e;
 645                 const vec_t *v[3];
 646                 double v2[3][3];
 647                 for (leafsurfaceindex = 0;leafsurfaceindex < leaf->numleafsurfaces;leafsurfaceindex++)
 648                 {
 649                         surfaceindex = leaf->firstleafsurface[leafsurfaceindex];
 650                         if (!CHECKPVSBIT(info->outsurfacepvs, surfaceindex))
 651                         {
 652                                 surface = info->model->data_surfaces + surfaceindex;
 653                                 if (BoxesOverlap(info->lightmins, info->lightmaxs, surface->mins, surface->maxs)
 654                                  && (!info->svbsp_insertoccluder || !(surface->texture->currentframe->currentmaterialflags & MATERIALFLAG_NOSHADOW)))
 655                                 {
 656                                         if (BoxInsideBox(surface->mins, surface->maxs, info->lightmins, info->lightmaxs))
 657                                         {
 658                                                 // surface is entirely inside light box
 659                                                 for (triangleindex = 0, t = surface->num_firstshadowmeshtriangle, e = info->model->brush.shadowmesh->element3i + t * 3;triangleindex < surface->num_triangles;triangleindex++, t++, e += 3)
 660                                                 {
 661                                                         v[0] = info->model->brush.shadowmesh->vertex3f + e[0] * 3;
 662                                                         v[1] = info->model->brush.shadowmesh->vertex3f + e[1] * 3;
 663                                                         v[2] = info->model->brush.shadowmesh->vertex3f + e[2] * 3;
 664                                                         if ((!r_shadow_frontsidecasting.integer || PointInfrontOfTriangle(info->relativelightorigin, v[0], v[1], v[2])))
 665                                                         {
 666                                                                 if (info->svbsp_active)
 667                                                                 {
 668                                                                         VectorCopy(v[0], v2[0]);
 669                                                                         VectorCopy(v[1], v2[1]);
 670                                                                         VectorCopy(v[2], v2[2]);
 671                                                                         if (!(SVBSP_AddPolygon(&r_svbsp, 3, v2[0], info->svbsp_insertoccluder, NULL, NULL, 0) & 2))
 672                                                                                 continue;
 673                                                                 }
 674                                                                 SETPVSBIT(info->outsurfacepvs, surfaceindex);
 675                                                                 info->outsurfacelist[info->outnumsurfaces++] = surfaceindex;
 676                                                                 if (!info->svbsp_insertoccluder)
 677                                                                         break;
 678                                                         }
 679                                                 }
 680                                         }
 681                                         else
 682                                         {
 683                                                 // surface is partially clipped by lightbox
 684                                                 // check each triangle's bounding box
 685                                                 for (triangleindex = 0, t = surface->num_firstshadowmeshtriangle, e = info->model->brush.shadowmesh->element3i + t * 3;triangleindex < surface->num_triangles;triangleindex++, t++, e += 3)
 686                                                 {
 687                                                         v[0] = info->model->brush.shadowmesh->vertex3f + e[0] * 3;
 688                                                         v[1] = info->model->brush.shadowmesh->vertex3f + e[1] * 3;
 689                                                         v[2] = info->model->brush.shadowmesh->vertex3f + e[2] * 3;
 690                                                         if ((!r_shadow_frontsidecasting.integer || PointInfrontOfTriangle(info->relativelightorigin, v[0], v[1], v[2]))
 691                                                          && info->lightmaxs[0] > min(v[0][0], min(v[1][0], v[2][0]))
 692                                                          && info->lightmins[0] < max(v[0][0], max(v[1][0], v[2][0]))
 693                                                          && info->lightmaxs[1] > min(v[0][1], min(v[1][1], v[2][1]))
 694                                                          && info->lightmins[1] < max(v[0][1], max(v[1][1], v[2][1]))
 695                                                          && info->lightmaxs[2] > min(v[0][2], min(v[1][2], v[2][2]))
 696                                                          && info->lightmins[2] < max(v[0][2], max(v[1][2], v[2][2])))
 697                                                         {
 698                                                                 if (info->svbsp_active)
 699                                                                 {
 700                                                                         VectorCopy(v[0], v2[0]);
 701                                                                         VectorCopy(v[1], v2[1]);
 702                                                                         VectorCopy(v[2], v2[2]);
 703                                                                         if (!(SVBSP_AddPolygon(&r_svbsp, 3, v2[0], info->svbsp_insertoccluder, NULL, NULL, 0) & 2))
 704                                                                                 continue;
 705                                                                 }
 706                                                                 SETPVSBIT(info->outsurfacepvs, surfaceindex);
 707                                                                 info->outsurfacelist[info->outnumsurfaces++] = surfaceindex;
 708                                                                 if (!info->svbsp_insertoccluder)
 709                                                                         break;
 710                                                         }
 711                                                 }
 712                                         }
 713                                 }
 714                         }
 715                 }
 716         }
 717 }
 718
 719 void R_Q1BSP_CallRecursiveGetLightInfo(r_q1bsp_getlightinfo_t *info, qboolean use_svbsp)
 720 {
 721         if (use_svbsp)
 722         {
 723                 double origin[3];
 724                 VectorCopy(info->relativelightorigin, origin);
 725                 if (!r_svbsp.nodes)
 726                 {
 727                         r_svbsp.maxnodes = max(r_svbsp.maxnodes, 1<<18);
 728                         r_svbsp.nodes = Mem_Alloc(r_main_mempool, r_svbsp.maxnodes * sizeof(svbsp_node_t));
 729                 }
 730                 info->svbsp_active = true;
 731                 info->svbsp_insertoccluder = true;
 732                 for (;;)
 733                 {
 734                         SVBSP_Init(&r_svbsp, origin, r_svbsp.maxnodes, r_svbsp.nodes);
 735                         R_Q1BSP_RecursiveGetLightInfo(info, info->model->brush.data_nodes);
 736                         // if that failed, retry with more nodes
 737                         if (r_svbsp.ranoutofnodes)
 738                         {
 739                                 // an upper limit is imposed
 740                                 if (r_svbsp.maxnodes >= 2<<22)
 741                                         break;
 742                                 Mem_Free(r_svbsp.nodes);
 743                                 r_svbsp.maxnodes *= 2;
 744                                 r_svbsp.nodes = Mem_Alloc(tempmempool, r_svbsp.maxnodes * sizeof(svbsp_node_t));
 745                         }
 746                         else
 747                                 break;
 748                 }
 749                 // now clear the surfacepvs array because we need to redo it
 750                 memset(info->outsurfacepvs, 0, (info->model->nummodelsurfaces + 7) >> 3);
 751                 info->outnumsurfaces = 0;
 752         }
 753         else
 754                 info->svbsp_active = false;
 755
 756         // we HAVE to mark the leaf the light is in as lit, because portals are
 757         // irrelevant to a leaf that the light source is inside of
 758         // (and they are all facing away, too)
 759         {
 760                 mnode_t *node = info->model->brush.data_nodes;
 761                 mleaf_t *leaf;
 762                 while (node->plane)
 763                         node = node->children[(node->plane->type < 3 ? info->relativelightorigin[node->plane->type] : DotProduct(info->relativelightorigin,node->plane->normal)) < node->plane->dist];
 764                 leaf = (mleaf_t *)node;
 765                 info->outmins[0] = min(info->outmins[0], leaf->mins[0]);
 766                 info->outmins[1] = min(info->outmins[1], leaf->mins[1]);
 767                 info->outmins[2] = min(info->outmins[2], leaf->mins[2]);
 768                 info->outmaxs[0] = max(info->outmaxs[0], leaf->maxs[0]);
 769                 info->outmaxs[1] = max(info->outmaxs[1], leaf->maxs[1]);
 770                 info->outmaxs[2] = max(info->outmaxs[2], leaf->maxs[2]);
 771                 if (info->outleafpvs)
 772                 {
 773                         int leafindex = leaf - info->model->brush.data_leafs;
 774                         if (!CHECKPVSBIT(info->outleafpvs, leafindex))
 775                         {
 776                                 SETPVSBIT(info->outleafpvs, leafindex);
 777                                 info->outleaflist[info->outnumleafs++] = leafindex;
 778                         }
 779                 }
 780         }
 781
 782         info->svbsp_insertoccluder = false;
 783         R_Q1BSP_RecursiveGetLightInfo(info, info->model->brush.data_nodes);
 784         if (developer.integer >= 100 && use_svbsp)
 785         {
 786                 Con_Printf("GetLightInfo: svbsp built with %i nodes, polygon stats:\n", r_svbsp.numnodes);
 787                 Con_Printf("occluders: %i accepted, %i rejected, %i fragments accepted, %i fragments rejected.\n", r_svbsp.stat_occluders_accepted, r_svbsp.stat_occluders_rejected, r_svbsp.stat_occluders_fragments_accepted, r_svbsp.stat_occluders_fragments_rejected);
 788                 Con_Printf("queries  : %i accepted, %i rejected, %i fragments accepted, %i fragments rejected.\n", r_svbsp.stat_queries_accepted, r_svbsp.stat_queries_rejected, r_svbsp.stat_queries_fragments_accepted, r_svbsp.stat_queries_fragments_rejected);
 789         }
 790 }
 791
 792 void R_Q1BSP_GetLightInfo(entity_render_t *ent, vec3_t relativelightorigin, float lightradius, vec3_t outmins, vec3_t outmaxs, int *outleaflist, unsigned char *outleafpvs, int *outnumleafspointer, int *outsurfacelist, unsigned char *outsurfacepvs, int *outnumsurfacespointer)
 793 {
 794         r_q1bsp_getlightinfo_t info;
 795         VectorCopy(relativelightorigin, info.relativelightorigin);
 796         info.lightradius = lightradius;
 797         info.lightmins[0] = info.relativelightorigin[0] - info.lightradius;
 798         info.lightmins[1] = info.relativelightorigin[1] - info.lightradius;
 799         info.lightmins[2] = info.relativelightorigin[2] - info.lightradius;
 800         info.lightmaxs[0] = info.relativelightorigin[0] + info.lightradius;
 801         info.lightmaxs[1] = info.relativelightorigin[1] + info.lightradius;
 802         info.lightmaxs[2] = info.relativelightorigin[2] + info.lightradius;
 803         if (ent->model == NULL)
 804         {
 805                 VectorCopy(info.lightmins, outmins);
 806                 VectorCopy(info.lightmaxs, outmaxs);
 807                 *outnumleafspointer = 0;
 808                 *outnumsurfacespointer = 0;
 809                 return;
 810         }
 811         info.model = ent->model;
 812         info.outleaflist = outleaflist;
 813         info.outleafpvs = outleafpvs;
 814         info.outnumleafs = 0;
 815         info.outsurfacelist = outsurfacelist;
 816         info.outsurfacepvs = outsurfacepvs;
 817         info.outnumsurfaces = 0;
 818         VectorCopy(info.relativelightorigin, info.outmins);
 819         VectorCopy(info.relativelightorigin, info.outmaxs);
 820         memset(outleafpvs, 0, (info.model->brush.num_leafs + 7) >> 3);
 821         memset(outsurfacepvs, 0, (info.model->nummodelsurfaces + 7) >> 3);
 822         if (info.model->brush.GetPVS && r_shadow_frontsidecasting.integer)
 823                 info.pvs = info.model->brush.GetPVS(info.model, info.relativelightorigin);
 824         else
 825                 info.pvs = NULL;
 826         R_UpdateAllTextureInfo(ent);
 827
 828         if (r_shadow_frontsidecasting.integer && r_shadow_compilingrtlight && r_shadow_realtime_world_compileportalculling.integer)
 829         {
 830                 // use portal recursion for exact light volume culling, and exact surface checking
 831                 Portal_Visibility(info.model, info.relativelightorigin, info.outleaflist, info.outleafpvs, &info.outnumleafs, info.outsurfacelist, info.outsurfacepvs, &info.outnumsurfaces, NULL, 0, true, info.lightmins, info.lightmaxs, info.outmins, info.outmaxs);
 832         }
 833         else if (r_shadow_frontsidecasting.integer && r_shadow_realtime_dlight_portalculling.integer)
 834         {
 835                 // use portal recursion for exact light volume culling, but not the expensive exact surface checking
 836                 Portal_Visibility(info.model, info.relativelightorigin, info.outleaflist, info.outleafpvs, &info.outnumleafs, info.outsurfacelist, info.outsurfacepvs, &info.outnumsurfaces, NULL, 0, r_shadow_realtime_dlight_portalculling.integer >= 2, info.lightmins, info.lightmaxs, info.outmins, info.outmaxs);
 837         }
 838         else
 839         {
 840                 // recurse the bsp tree, checking leafs and surfaces for visibility
 841                 // optionally using svbsp for exact culling of compiled lights
 842                 // (or if the user enables dlight svbsp culling, which is mostly for
 843                 //  debugging not actual use)
 844                 R_Q1BSP_CallRecursiveGetLightInfo(&info, r_shadow_compilingrtlight ? r_shadow_realtime_world_compilesvbsp.integer : r_shadow_realtime_dlight_svbspculling.integer);
 845         }
 846
 847         // limit combined leaf box to light boundaries
 848         outmins[0] = max(info.outmins[0] - 1, info.lightmins[0]);
 849         outmins[1] = max(info.outmins[1] - 1, info.lightmins[1]);
 850         outmins[2] = max(info.outmins[2] - 1, info.lightmins[2]);
 851         outmaxs[0] = min(info.outmaxs[0] + 1, info.lightmaxs[0]);
 852         outmaxs[1] = min(info.outmaxs[1] + 1, info.lightmaxs[1]);
 853         outmaxs[2] = min(info.outmaxs[2] + 1, info.lightmaxs[2]);
 854
 855         *outnumleafspointer = info.outnumleafs;
 856         *outnumsurfacespointer = info.outnumsurfaces;
 857 }
 858
 859 void R_Q1BSP_CompileShadowVolume(entity_render_t *ent, vec3_t relativelightorigin, vec3_t relativelightdirection, float lightradius, int numsurfaces, const int *surfacelist)
 860 {
 861         model_t *model = ent->model;
 862         msurface_t *surface;
 863         int surfacelistindex;
 864         float projectdistance = relativelightdirection ? lightradius : lightradius + model->radius*2 + r_shadow_projectdistance.value;
 865         r_shadow_compilingrtlight->static_meshchain_shadow = Mod_ShadowMesh_Begin(r_main_mempool, 32768, 32768, NULL, NULL, NULL, false, false, true);
 866         R_Shadow_PrepareShadowMark(model->brush.shadowmesh->numtriangles);
 867         for (surfacelistindex = 0;surfacelistindex < numsurfaces;surfacelistindex++)
 868         {
 869                 surface = model->data_surfaces + surfacelist[surfacelistindex];
 870                 if (surface->texture->currentframe->basematerialflags & MATERIALFLAG_NOSHADOW)
 871                         continue;
 872                 R_Shadow_MarkVolumeFromBox(surface->num_firstshadowmeshtriangle, surface->num_triangles, model->brush.shadowmesh->vertex3f, model->brush.shadowmesh->element3i, relativelightorigin, relativelightdirection, r_shadow_compilingrtlight->cullmins, r_shadow_compilingrtlight->cullmaxs, surface->mins, surface->maxs);
 873         }
 874         R_Shadow_VolumeFromList(model->brush.shadowmesh->numverts, model->brush.shadowmesh->numtriangles, model->brush.shadowmesh->vertex3f, model->brush.shadowmesh->element3i, model->brush.shadowmesh->neighbor3i, relativelightorigin, relativelightdirection, projectdistance, numshadowmark, shadowmarklist);
 875         r_shadow_compilingrtlight->static_meshchain_shadow = Mod_ShadowMesh_Finish(r_main_mempool, r_shadow_compilingrtlight->static_meshchain_shadow, false, false);
 876 }
 877
 878 void R_Q1BSP_DrawShadowVolume(entity_render_t *ent, vec3_t relativelightorigin, vec3_t relativelightdirection, float lightradius, int modelnumsurfaces, const int *modelsurfacelist, const vec3_t lightmins, const vec3_t lightmaxs)
 879 {
 880         model_t *model = ent->model;
 881         msurface_t *surface;
 882         int modelsurfacelistindex;
 883         float projectdistance = relativelightdirection ? lightradius : lightradius + model->radius*2 + r_shadow_projectdistance.value;
 884         // check the box in modelspace, it was already checked in worldspace
 885         if (!BoxesOverlap(model->normalmins, model->normalmaxs, lightmins, lightmaxs))
 886                 return;
 887         R_UpdateAllTextureInfo(ent);
 888         if (model->brush.shadowmesh)
 889         {
 890                 R_Shadow_PrepareShadowMark(model->brush.shadowmesh->numtriangles);
 891                 for (modelsurfacelistindex = 0;modelsurfacelistindex < modelnumsurfaces;modelsurfacelistindex++)
 892                 {
 893                         surface = model->data_surfaces + modelsurfacelist[modelsurfacelistindex];
 894                         if (surface->texture->currentframe->currentmaterialflags & MATERIALFLAG_NOSHADOW)
 895                                 continue;
 896                         R_Shadow_MarkVolumeFromBox(surface->num_firstshadowmeshtriangle, surface->num_triangles, model->brush.shadowmesh->vertex3f, model->brush.shadowmesh->element3i, relativelightorigin, relativelightdirection, lightmins, lightmaxs, surface->mins, surface->maxs);
 897                 }
 898                 R_Shadow_VolumeFromList(model->brush.shadowmesh->numverts, model->brush.shadowmesh->numtriangles, model->brush.shadowmesh->vertex3f, model->brush.shadowmesh->element3i, model->brush.shadowmesh->neighbor3i, relativelightorigin, relativelightdirection, projectdistance, numshadowmark, shadowmarklist);
 899         }
 900         else
 901         {
 902                 projectdistance = lightradius + model->radius*2;
 903                 R_Shadow_PrepareShadowMark(model->surfmesh.num_triangles);
 904                 // identify lit faces within the bounding box
 905                 for (modelsurfacelistindex = 0;modelsurfacelistindex < modelnumsurfaces;modelsurfacelistindex++)
 906                 {
 907                         surface = model->data_surfaces + modelsurfacelist[modelsurfacelistindex];
 908                         rsurface_texture = surface->texture->currentframe;
 909                         if (rsurface_texture->currentmaterialflags & MATERIALFLAG_NOSHADOW)
 910                                 continue;
 911                         RSurf_PrepareVerticesForBatch(false, false, 1, &surface);
 912                         R_Shadow_MarkVolumeFromBox(surface->num_firsttriangle, surface->num_triangles, rsurface_vertex3f, rsurface_model->surfmesh.data_element3i, relativelightorigin, relativelightdirection, lightmins, lightmaxs, surface->mins, surface->maxs);
 913                 }
 914                 R_Shadow_VolumeFromList(model->surfmesh.num_vertices, model->surfmesh.num_triangles, rsurface_vertex3f, model->surfmesh.data_element3i, model->surfmesh.data_neighbor3i, relativelightorigin, relativelightdirection, projectdistance, numshadowmark, shadowmarklist);
 915         }
 916 }
 917
 918 #define BATCHSIZE 256
 919
 920 static void R_Q1BSP_DrawLight_TransparentCallback(const entity_render_t *ent, const rtlight_t *rtlight, int numsurfaces, int *surfacelist)
 921 {
 922         int i, j, batchnumsurfaces, endsurface;
 923         texture_t *t;
 924         msurface_t *surface;
 925         msurface_t *batchsurfaces[BATCHSIZE];
 926         // note: in practice this never actually batches, oh well
 927         R_Shadow_RenderMode_Begin();
 928         R_Shadow_RenderMode_ActiveLight((rtlight_t *)rtlight);
 929         R_Shadow_RenderMode_Lighting(false, true);
 930         R_Shadow_SetupEntityLight(ent);
 931         for (i = 0;i < numsurfaces;i = j)
 932         {
 933                 j = i + 1;
 934                 surface = rsurface_model->data_surfaces + surfacelist[i];
 935                 t = surface->texture;
 936                 R_UpdateTextureInfo(ent, t);
 937                 rsurface_texture = t->currentframe;
 938                 endsurface = min(j + BATCHSIZE, numsurfaces);
 939                 batchnumsurfaces = 0;
 940                 batchsurfaces[batchnumsurfaces++] = surface;
 941                 for (;j < endsurface;j++)
 942                 {
 943                         surface = rsurface_model->data_surfaces + surfacelist[j];
 944                         if (t != surface->texture)
 945                                 continue;
 946                         batchsurfaces[batchnumsurfaces++] = surface;
 947                 }
 948                 R_Shadow_RenderSurfacesLighting(batchnumsurfaces, batchsurfaces);
 949         }
 950         R_Shadow_RenderMode_End();
 951 }
 952
 953 static void R_Q1BSP_DrawLight_TransparentBatch(int batchnumsurfaces, msurface_t **batchsurfacelist)
 954 {
 955         int batchsurfaceindex;
 956         msurface_t *batchsurface;
 957         vec3_t tempcenter, center;
 958         for (batchsurfaceindex = 0;batchsurfaceindex < batchnumsurfaces;batchsurfaceindex++)
 959         {
 960                 batchsurface = batchsurfacelist[batchsurfaceindex];
 961                 tempcenter[0] = (batchsurface->mins[0] + batchsurface->maxs[0]) * 0.5f;
 962                 tempcenter[1] = (batchsurface->mins[1] + batchsurface->maxs[1]) * 0.5f;
 963                 tempcenter[2] = (batchsurface->mins[2] + batchsurface->maxs[2]) * 0.5f;
 964                 Matrix4x4_Transform(&rsurface_entity->matrix, tempcenter, center);
 965                 R_MeshQueue_AddTransparent(rsurface_texture->currentmaterialflags & MATERIALFLAG_NODEPTHTEST ? r_view.origin : center, R_Q1BSP_DrawLight_TransparentCallback, rsurface_entity, batchsurface - rsurface_model->data_surfaces, r_shadow_rtlight);
 966         }
 967 }
 968
 969 #define RSURF_MAX_BATCHSURFACES 1024
 970
 971 void R_Q1BSP_DrawLight(entity_render_t *ent, int numsurfaces, const int *surfacelist)
 972 {
 973         model_t *model = ent->model;
 974         msurface_t *surface;
 975         int i, k, l, endsurface, batchnumsurfaces;
 976         msurface_t *batchsurfacelist[RSURF_MAX_BATCHSURFACES];
 977         texture_t *tex;
 978         CHECKGLERROR
 979         RSurf_ActiveModelEntity(ent, true, true);
 980         R_UpdateAllTextureInfo(ent);
 981         CHECKGLERROR
 982         // this is a double loop because non-visible surface skipping has to be
 983         // fast, and even if this is not the world model (and hence no visibility
 984         // checking) the input surface list and batch buffer are different formats
 985         // so some processing is necessary.  (luckily models have few surfaces)
 986         for (i = 0;i < numsurfaces;)
 987         {
 988                 batchnumsurfaces = 0;
 989                 endsurface = min(i + RSURF_MAX_BATCHSURFACES, numsurfaces);
 990                 if (ent == r_refdef.worldentity)
 991                 {
 992                         for (;i < endsurface;i++)
 993                                 if (r_viewcache.world_surfacevisible[surfacelist[i]])
 994                                         batchsurfacelist[batchnumsurfaces++] = model->data_surfaces + surfacelist[i];
 995                 }
 996                 else
 997                 {
 998                         for (;i < endsurface;i++)
 999                                 batchsurfacelist[batchnumsurfaces++] = model->data_surfaces + surfacelist[i];
1000                 }
1001                 if (!batchnumsurfaces)
1002                         continue;
1003                 for (k = 0;k < batchnumsurfaces;k = l)
1004                 {
1005                         surface = batchsurfacelist[k];
1006                         tex = surface->texture;
1007                         rsurface_texture = tex->currentframe;
1008                         for (l = k;l < batchnumsurfaces && tex == batchsurfacelist[l]->texture;l++)
1009                                 r_refdef.stats.lights_lighttriangles += batchsurfacelist[l]->num_triangles;
1010                         if (rsurface_texture->currentmaterialflags & (MATERIALFLAG_WALL | MATERIALFLAG_WATER))
1011                         {
1012                                 if (rsurface_texture->currentmaterialflags & MATERIALFLAG_BLENDED)
1013                                         R_Q1BSP_DrawLight_TransparentBatch(l - k, batchsurfacelist + k);
1014                                 else
1015                                         R_Shadow_RenderSurfacesLighting(l - k, batchsurfacelist + k);
1016                         }
1017                 }
1018         }
1019 }
1020
1021 //Made by [515]
1022 void R_ReplaceWorldTexture (void)
1023 {
1024         model_t         *m;
1025         texture_t       *t;
1026         int                     i;
1027         const char      *r, *newt;
1028         m = r_refdef.worldmodel;
1029
1030         if(Cmd_Argc() < 2)
1031         {
1032                 Con_Print("r_replacemaptexture <texname> <newtexname> - replaces texture\n");
1033                 Con_Print("r_replacemaptexture <texname> - switch back to default texture\n");
1034                 return;
1035         }
1036         if(!cl.islocalgame || !cl.worldmodel)
1037         {
1038                 Con_Print("This command works only in singleplayer\n");
1039                 return;
1040         }
1041         r = Cmd_Argv(1);
1042         newt = Cmd_Argv(2);
1043         if(!newt[0])
1044                 newt = r;
1045         for(i=0,t=m->data_textures;i<m->num_textures;i++,t++)
1046         {
1047                 if(t->width && !strcasecmp(t->name, r))
1048                 {
1049                         if(Mod_LoadSkinFrame(&t->skinframes[0], (char*)newt, TEXF_MIPMAP | TEXF_ALPHA | TEXF_PRECACHE | TEXF_PICMIP, false, r_fullbrights.integer))
1050                         {
1051                                 Con_Printf("%s replaced with %s\n", r, newt);
1052                                 return;
1053                         }
1054                         else
1055                         {
1056                                 Con_Printf("%s was not found\n", newt);
1057                                 Mod_LoadSkinFrame(&t->skinframes[0], (char*)r, TEXF_MIPMAP | TEXF_ALPHA | TEXF_PRECACHE | TEXF_PICMIP, false, r_fullbrights.integer);//back to default
1058                                 return;
1059                         }
1060                 }
1061         }
1062 }
1063
1064 //Made by [515]
1065 void R_ListWorldTextures (void)
1066 {
1067         model_t         *m;
1068         texture_t       *t;
1069         int                     i;
1070         m = r_refdef.worldmodel;
1071
1072         Con_Print("Worldmodel textures :\n");
1073         for(i=0,t=m->data_textures;i<m->num_textures;i++,t++)
1074                 if (t->numskinframes)
1075                         Con_Printf("%s\n", t->name);
1076 }
1077
1078 #if 0
1079 static void gl_surf_start(void)
1080 {
1081 }
1082
1083 static void gl_surf_shutdown(void)
1084 {
1085 }
1086
1087 static void gl_surf_newmap(void)
1088 {
1089 }
1090 #endif
1091
1092 void GL_Surf_Init(void)
1093 {
1094
1095         Cvar_RegisterVariable(&r_ambient);
1096         Cvar_RegisterVariable(&r_lockpvs);
1097         Cvar_RegisterVariable(&r_lockvisibility);
1098         Cvar_RegisterVariable(&r_useportalculling);
1099         Cvar_RegisterVariable(&r_q3bsp_renderskydepth);
1100
1101         Cmd_AddCommand ("r_replacemaptexture", R_ReplaceWorldTexture, "override a map texture for testing purposes");   // By [515]
1102         Cmd_AddCommand ("r_listmaptextures", R_ListWorldTextures, "list all textures used by the current map"); // By [515]
1103
1104         //R_RegisterModule("GL_Surf", gl_surf_start, gl_surf_shutdown, gl_surf_newmap);
1105 }
1106