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", "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", "1", "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_q3bsp_renderskydepth = {0, "r_q3bsp_renderskydepth", "0", "draws sky depth masking in q3 maps (as in q1 maps), this means for example that sky polygons can hide other things"};
  33
  34 /*
  35 ===============
  36 R_BuildLightMap
  37
  38 Combine and scale multiple lightmaps into the 8.8 format in blocklights
  39 ===============
  40 */
  41 void R_BuildLightMap (const entity_render_t *ent, msurface_t *surface)
  42 {
  43         int smax, tmax, i, size, size3, maps, l;
  44         int *bl, scale;
  45         unsigned char *lightmap, *out, *stain;
  46         dp_model_t *model = ent->model;
  47         int *intblocklights;
  48         unsigned char *templight;
  49
  50         smax = (surface->lightmapinfo->extents[0]>>4)+1;
  51         tmax = (surface->lightmapinfo->extents[1]>>4)+1;
  52         size = smax*tmax;
  53         size3 = size*3;
  54
  55         r_refdef.stats.lightmapupdatepixels += size;
  56         r_refdef.stats.lightmapupdates++;
  57
  58         if (cl.buildlightmapmemorysize < size*sizeof(int[3]))
  59         {
  60                 cl.buildlightmapmemorysize = size*sizeof(int[3]);
  61                 if (cl.buildlightmapmemory)
  62                         Mem_Free(cl.buildlightmapmemory);
  63                 cl.buildlightmapmemory = (unsigned char *) Mem_Alloc(cls.levelmempool, cl.buildlightmapmemorysize);
  64         }
  65
  66         // these both point at the same buffer, templight is only used for final
  67         // processing and can replace the intblocklights data as it goes
  68         intblocklights = (int *)cl.buildlightmapmemory;
  69         templight = (unsigned char *)cl.buildlightmapmemory;
  70
  71         // update cached lighting info
  72         model->brushq1.lightmapupdateflags[surface - model->data_surfaces] = false;
  73
  74         lightmap = surface->lightmapinfo->samples;
  75
  76 // set to full bright if no light data
  77         bl = intblocklights;
  78         if (!model->brushq1.lightdata)
  79         {
  80                 for (i = 0;i < size3;i++)
  81                         bl[i] = 128*256;
  82         }
  83         else
  84         {
  85 // clear to no light
  86                 memset(bl, 0, size3*sizeof(*bl));
  87
  88 // add all the lightmaps
  89                 if (lightmap)
  90                         for (maps = 0;maps < MAXLIGHTMAPS && surface->lightmapinfo->styles[maps] != 255;maps++, lightmap += size3)
  91                                 for (scale = r_refdef.scene.lightstylevalue[surface->lightmapinfo->styles[maps]], i = 0;i < size3;i++)
  92                                         bl[i] += lightmap[i] * scale;
  93         }
  94
  95         stain = surface->lightmapinfo->stainsamples;
  96         bl = intblocklights;
  97         out = templight;
  98         // the >> 16 shift adjusts down 8 bits to account for the stainmap
  99         // scaling, and remaps the 0-65536 (2x overbright) to 0-256, it will
 100         // be doubled during rendering to achieve 2x overbright
 101         // (0 = 0.0, 128 = 1.0, 256 = 2.0)
 102         if (stain)
 103         {
 104                 for (i = 0;i < size;i++, bl += 3, stain += 3, out += 4)
 105                 {
 106                         l = (bl[0] * stain[0]) >> 16;out[2] = min(l, 255);
 107                         l = (bl[1] * stain[1]) >> 16;out[1] = min(l, 255);
 108                         l = (bl[2] * stain[2]) >> 16;out[0] = min(l, 255);
 109                         out[3] = 255;
 110                 }
 111         }
 112         else
 113         {
 114                 for (i = 0;i < size;i++, bl += 3, out += 4)
 115                 {
 116                         l = bl[0] >> 8;out[2] = min(l, 255);
 117                         l = bl[1] >> 8;out[1] = min(l, 255);
 118                         l = bl[2] >> 8;out[0] = min(l, 255);
 119                         out[3] = 255;
 120                 }
 121         }
 122
 123         R_UpdateTexture(surface->lightmaptexture, templight, surface->lightmapinfo->lightmaporigin[0], surface->lightmapinfo->lightmaporigin[1], smax, tmax);
 124
 125         // update the surface's deluxemap if it has one
 126         if (surface->deluxemaptexture != r_texture_blanknormalmap)
 127         {
 128                 vec3_t n;
 129                 unsigned char *normalmap = surface->lightmapinfo->nmapsamples;
 130                 lightmap = surface->lightmapinfo->samples;
 131                 // clear to no normalmap
 132                 bl = intblocklights;
 133                 memset(bl, 0, size3*sizeof(*bl));
 134                 // add all the normalmaps
 135                 if (lightmap && normalmap)
 136                 {
 137                         for (maps = 0;maps < MAXLIGHTMAPS && surface->lightmapinfo->styles[maps] != 255;maps++, lightmap += size3, normalmap += size3)
 138                         {
 139                                 for (scale = r_refdef.scene.lightstylevalue[surface->lightmapinfo->styles[maps]], i = 0;i < size;i++)
 140                                 {
 141                                         // add the normalmap with weighting proportional to the style's lightmap intensity
 142                                         l = (int)(VectorLength(lightmap + i*3) * scale);
 143                                         bl[i*3+0] += ((int)normalmap[i*3+0] - 128) * l;
 144                                         bl[i*3+1] += ((int)normalmap[i*3+1] - 128) * l;
 145                                         bl[i*3+2] += ((int)normalmap[i*3+2] - 128) * l;
 146                                 }
 147                         }
 148                 }
 149                 bl = intblocklights;
 150                 out = templight;
 151                 // we simply renormalize the weighted normals to get a valid deluxemap
 152                 for (i = 0;i < size;i++, bl += 3, out += 4)
 153                 {
 154                         VectorCopy(bl, n);
 155                         VectorNormalize(n);
 156                         l = (int)(n[0] * 128 + 128);out[2] = bound(0, l, 255);
 157                         l = (int)(n[1] * 128 + 128);out[1] = bound(0, l, 255);
 158                         l = (int)(n[2] * 128 + 128);out[0] = bound(0, l, 255);
 159                         out[3] = 255;
 160                 }
 161                 R_UpdateTexture(surface->deluxemaptexture, templight, surface->lightmapinfo->lightmaporigin[0], surface->lightmapinfo->lightmaporigin[1], smax, tmax);
 162         }
 163 }
 164
 165 void R_StainNode (mnode_t *node, dp_model_t *model, const vec3_t origin, float radius, const float fcolor[8])
 166 {
 167         float ndist, a, ratio, maxdist, maxdist2, maxdist3, invradius, sdtable[256], td, dist2;
 168         msurface_t *surface, *endsurface;
 169         int i, s, t, smax, tmax, smax3, impacts, impactt, stained;
 170         unsigned char *bl;
 171         vec3_t impact;
 172
 173         maxdist = radius * radius;
 174         invradius = 1.0f / radius;
 175
 176 loc0:
 177         if (!node->plane)
 178                 return;
 179         ndist = PlaneDiff(origin, node->plane);
 180         if (ndist > radius)
 181         {
 182                 node = node->children[0];
 183                 goto loc0;
 184         }
 185         if (ndist < -radius)
 186         {
 187                 node = node->children[1];
 188                 goto loc0;
 189         }
 190
 191         dist2 = ndist * ndist;
 192         maxdist3 = maxdist - dist2;
 193
 194         if (node->plane->type < 3)
 195         {
 196                 VectorCopy(origin, impact);
 197                 impact[node->plane->type] -= ndist;
 198         }
 199         else
 200         {
 201                 impact[0] = origin[0] - node->plane->normal[0] * ndist;
 202                 impact[1] = origin[1] - node->plane->normal[1] * ndist;
 203                 impact[2] = origin[2] - node->plane->normal[2] * ndist;
 204         }
 205
 206         for (surface = model->data_surfaces + node->firstsurface, endsurface = surface + node->numsurfaces;surface < endsurface;surface++)
 207         {
 208                 if (surface->lightmapinfo->stainsamples)
 209                 {
 210                         smax = (surface->lightmapinfo->extents[0] >> 4) + 1;
 211                         tmax = (surface->lightmapinfo->extents[1] >> 4) + 1;
 212
 213                         impacts = (int)(DotProduct (impact, surface->lightmapinfo->texinfo->vecs[0]) + surface->lightmapinfo->texinfo->vecs[0][3] - surface->lightmapinfo->texturemins[0]);
 214                         impactt = (int)(DotProduct (impact, surface->lightmapinfo->texinfo->vecs[1]) + surface->lightmapinfo->texinfo->vecs[1][3] - surface->lightmapinfo->texturemins[1]);
 215
 216                         s = bound(0, impacts, smax * 16) - impacts;
 217                         t = bound(0, impactt, tmax * 16) - impactt;
 218                         i = (int)(s * s + t * t + dist2);
 219                         if ((i > maxdist) || (smax > (int)(sizeof(sdtable)/sizeof(sdtable[0])))) // smax overflow fix from Andreas Dehmel
 220                                 continue;
 221
 222                         // reduce calculations
 223                         for (s = 0, i = impacts; s < smax; s++, i -= 16)
 224                                 sdtable[s] = i * i + dist2;
 225
 226                         bl = surface->lightmapinfo->stainsamples;
 227                         smax3 = smax * 3;
 228                         stained = false;
 229
 230                         i = impactt;
 231                         for (t = 0;t < tmax;t++, i -= 16)
 232                         {
 233                                 td = i * i;
 234                                 // make sure some part of it is visible on this line
 235                                 if (td < maxdist3)
 236                                 {
 237                                         maxdist2 = maxdist - td;
 238                                         for (s = 0;s < smax;s++)
 239                                         {
 240                                                 if (sdtable[s] < maxdist2)
 241                                                 {
 242                                                         ratio = lhrandom(0.0f, 1.0f);
 243                                                         a = (fcolor[3] + ratio * fcolor[7]) * (1.0f - sqrt(sdtable[s] + td) * invradius);
 244                                                         if (a >= (1.0f / 64.0f))
 245                                                         {
 246                                                                 if (a > 1)
 247                                                                         a = 1;
 248                                                                 bl[0] = (unsigned char) ((float) bl[0] + a * ((fcolor[0] + ratio * fcolor[4]) - (float) bl[0]));
 249                                                                 bl[1] = (unsigned char) ((float) bl[1] + a * ((fcolor[1] + ratio * fcolor[5]) - (float) bl[1]));
 250                                                                 bl[2] = (unsigned char) ((float) bl[2] + a * ((fcolor[2] + ratio * fcolor[6]) - (float) bl[2]));
 251                                                                 stained = true;
 252                                                         }
 253                                                 }
 254                                                 bl += 3;
 255                                         }
 256                                 }
 257                                 else // skip line
 258                                         bl += smax3;
 259                         }
 260                         // force lightmap upload
 261                         if (stained)
 262                                 model->brushq1.lightmapupdateflags[surface - model->data_surfaces] = true;
 263                 }
 264         }
 265
 266         if (node->children[0]->plane)
 267         {
 268                 if (node->children[1]->plane)
 269                 {
 270                         R_StainNode(node->children[0], model, origin, radius, fcolor);
 271                         node = node->children[1];
 272                         goto loc0;
 273                 }
 274                 else
 275                 {
 276                         node = node->children[0];
 277                         goto loc0;
 278                 }
 279         }
 280         else if (node->children[1]->plane)
 281         {
 282                 node = node->children[1];
 283                 goto loc0;
 284         }
 285 }
 286
 287 void R_Stain (const vec3_t origin, float radius, int cr1, int cg1, int cb1, int ca1, int cr2, int cg2, int cb2, int ca2)
 288 {
 289         int n;
 290         float fcolor[8];
 291         entity_render_t *ent;
 292         dp_model_t *model;
 293         vec3_t org;
 294         if (r_refdef.scene.worldmodel == NULL || !r_refdef.scene.worldmodel->brush.data_nodes || !r_refdef.scene.worldmodel->brushq1.lightdata)
 295                 return;
 296         fcolor[0] = cr1;
 297         fcolor[1] = cg1;
 298         fcolor[2] = cb1;
 299         fcolor[3] = ca1 * (1.0f / 64.0f);
 300         fcolor[4] = cr2 - cr1;
 301         fcolor[5] = cg2 - cg1;
 302         fcolor[6] = cb2 - cb1;
 303         fcolor[7] = (ca2 - ca1) * (1.0f / 64.0f);
 304
 305         R_StainNode(r_refdef.scene.worldmodel->brush.data_nodes + r_refdef.scene.worldmodel->brushq1.hulls[0].firstclipnode, r_refdef.scene.worldmodel, origin, radius, fcolor);
 306
 307         // look for embedded bmodels
 308         for (n = 0;n < cl.num_brushmodel_entities;n++)
 309         {
 310                 ent = &cl.entities[cl.brushmodel_entities[n]].render;
 311                 model = ent->model;
 312                 if (model && model->name[0] == '*')
 313                 {
 314                         if (model->brush.data_nodes)
 315                         {
 316                                 Matrix4x4_Transform(&ent->inversematrix, origin, org);
 317                                 R_StainNode(model->brush.data_nodes + model->brushq1.hulls[0].firstclipnode, model, org, radius, fcolor);
 318                         }
 319                 }
 320         }
 321 }
 322
 323
 324 /*
 325 =============================================================
 326
 327         BRUSH MODELS
 328
 329 =============================================================
 330 */
 331
 332 static void R_DrawPortal_Callback(const entity_render_t *ent, const rtlight_t *rtlight, int numsurfaces, int *surfacelist)
 333 {
 334         // due to the hacky nature of this function's parameters, this is never
 335         // called with a batch, so numsurfaces is always 1, and the surfacelist
 336         // contains only a leaf number for coloring purposes
 337         const mportal_t *portal = (mportal_t *)ent;
 338         int i, numpoints;
 339         float *v;
 340         float vertex3f[POLYGONELEMENTS_MAXPOINTS*3];
 341         CHECKGLERROR
 342         GL_BlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
 343         GL_DepthMask(false);
 344         GL_DepthRange(0, 1);
 345         GL_PolygonOffset(r_refdef.polygonfactor, r_refdef.polygonoffset);
 346         GL_DepthTest(true);
 347         GL_CullFace(GL_NONE);
 348         R_Mesh_Matrix(&identitymatrix);
 349
 350         numpoints = min(portal->numpoints, POLYGONELEMENTS_MAXPOINTS);
 351
 352         R_Mesh_VertexPointer(vertex3f, 0, 0);
 353         R_Mesh_ColorPointer(NULL, 0, 0);
 354         R_Mesh_ResetTextureState();
 355         R_SetupGenericShader(false);
 356
 357         i = surfacelist[0];
 358         GL_Color(((i & 0x0007) >> 0) * (1.0f / 7.0f) * r_refdef.view.colorscale,
 359                          ((i & 0x0038) >> 3) * (1.0f / 7.0f) * r_refdef.view.colorscale,
 360                          ((i & 0x01C0) >> 6) * (1.0f / 7.0f) * r_refdef.view.colorscale,
 361                          0.125f);
 362         for (i = 0, v = vertex3f;i < numpoints;i++, v += 3)
 363                 VectorCopy(portal->points[i].position, v);
 364         R_Mesh_Draw(0, numpoints, 0, numpoints - 2, NULL, polygonelements, 0, 0);
 365 }
 366
 367 // LordHavoc: this is just a nice debugging tool, very slow
 368 void R_DrawPortals(void)
 369 {
 370         int i, leafnum;
 371         mportal_t *portal;
 372         float center[3], f;
 373         dp_model_t *model = r_refdef.scene.worldmodel;
 374         if (model == NULL)
 375                 return;
 376         for (leafnum = 0;leafnum < r_refdef.scene.worldmodel->brush.num_leafs;leafnum++)
 377         {
 378                 if (r_refdef.viewcache.world_leafvisible[leafnum])
 379                 {
 380                         //for (portalnum = 0, portal = model->brush.data_portals;portalnum < model->brush.num_portals;portalnum++, portal++)
 381                         for (portal = r_refdef.scene.worldmodel->brush.data_leafs[leafnum].portals;portal;portal = portal->next)
 382                         {
 383                                 if (portal->numpoints <= POLYGONELEMENTS_MAXPOINTS)
 384                                 if (!R_CullBox(portal->mins, portal->maxs))
 385                                 {
 386                                         VectorClear(center);
 387                                         for (i = 0;i < portal->numpoints;i++)
 388                                                 VectorAdd(center, portal->points[i].position, center);
 389                                         f = ixtable[portal->numpoints];
 390                                         VectorScale(center, f, center);
 391                                         R_MeshQueue_AddTransparent(center, R_DrawPortal_Callback, (entity_render_t *)portal, leafnum, rsurface.rtlight);
 392                                 }
 393                         }
 394                 }
 395         }
 396 }
 397
 398 void R_View_WorldVisibility(qboolean forcenovis)
 399 {
 400         int i, j, *mark;
 401         mleaf_t *leaf;
 402         mleaf_t *viewleaf;
 403         dp_model_t *model = r_refdef.scene.worldmodel;
 404
 405         if (!model)
 406                 return;
 407
 408         if (r_refdef.view.usecustompvs)
 409         {
 410                 // clear the visible surface and leaf flags arrays
 411                 memset(r_refdef.viewcache.world_surfacevisible, 0, model->num_surfaces);
 412                 memset(r_refdef.viewcache.world_leafvisible, 0, model->brush.num_leafs);
 413                 r_refdef.viewcache.world_novis = false;
 414
 415                 // simply cull each marked leaf to the frustum (view pyramid)
 416                 for (j = 0, leaf = model->brush.data_leafs;j < model->brush.num_leafs;j++, leaf++)
 417                 {
 418                         // if leaf is in current pvs and on the screen, mark its surfaces
 419                         if (CHECKPVSBIT(r_refdef.viewcache.world_pvsbits, leaf->clusterindex) && !R_CullBox(leaf->mins, leaf->maxs))
 420                         {
 421                                 r_refdef.stats.world_leafs++;
 422                                 r_refdef.viewcache.world_leafvisible[j] = true;
 423                                 if (leaf->numleafsurfaces)
 424                                         for (i = 0, mark = leaf->firstleafsurface;i < leaf->numleafsurfaces;i++, mark++)
 425                                                 r_refdef.viewcache.world_surfacevisible[*mark] = true;
 426                         }
 427                 }
 428                 return;
 429         }
 430
 431         // if possible find the leaf the view origin is in
 432         viewleaf = model->brush.PointInLeaf ? model->brush.PointInLeaf(model, r_refdef.view.origin) : NULL;
 433         // if possible fetch the visible cluster bits
 434         if (!r_lockpvs.integer && model->brush.FatPVS)
 435                 model->brush.FatPVS(model, r_refdef.view.origin, 2, r_refdef.viewcache.world_pvsbits, sizeof(r_refdef.viewcache.world_pvsbits), false);
 436
 437         if (!r_lockvisibility.integer)
 438         {
 439                 // clear the visible surface and leaf flags arrays
 440                 memset(r_refdef.viewcache.world_surfacevisible, 0, model->num_surfaces);
 441                 memset(r_refdef.viewcache.world_leafvisible, 0, model->brush.num_leafs);
 442
 443                 r_refdef.viewcache.world_novis = false;
 444
 445                 // if floating around in the void (no pvs data available, and no
 446                 // portals available), simply use all on-screen leafs.
 447                 if (!viewleaf || viewleaf->clusterindex < 0 || forcenovis)
 448                 {
 449                         // no visibility method: (used when floating around in the void)
 450                         // simply cull each leaf to the frustum (view pyramid)
 451                         // similar to quake's RecursiveWorldNode but without cache misses
 452                         r_refdef.viewcache.world_novis = true;
 453                         for (j = 0, leaf = model->brush.data_leafs;j < model->brush.num_leafs;j++, leaf++)
 454                         {
 455                                 // if leaf is in current pvs and on the screen, mark its surfaces
 456                                 if (!R_CullBox(leaf->mins, leaf->maxs))
 457                                 {
 458                                         r_refdef.stats.world_leafs++;
 459                                         r_refdef.viewcache.world_leafvisible[j] = true;
 460                                         if (leaf->numleafsurfaces)
 461                                                 for (i = 0, mark = leaf->firstleafsurface;i < leaf->numleafsurfaces;i++, mark++)
 462                                                         r_refdef.viewcache.world_surfacevisible[*mark] = true;
 463                                 }
 464                         }
 465                 }
 466                 // just check if each leaf in the PVS is on screen
 467                 // (unless portal culling is enabled)
 468                 else if (!model->brush.data_portals || r_useportalculling.integer < 1 || (r_useportalculling.integer < 2 && !r_novis.integer))
 469                 {
 470                         // pvs method:
 471                         // simply check if each leaf is in the Potentially Visible Set,
 472                         // and cull to frustum (view pyramid)
 473                         // similar to quake's RecursiveWorldNode but without cache misses
 474                         for (j = 0, leaf = model->brush.data_leafs;j < model->brush.num_leafs;j++, leaf++)
 475                         {
 476                                 // if leaf is in current pvs and on the screen, mark its surfaces
 477                                 if (CHECKPVSBIT(r_refdef.viewcache.world_pvsbits, leaf->clusterindex) && !R_CullBox(leaf->mins, leaf->maxs))
 478                                 {
 479                                         r_refdef.stats.world_leafs++;
 480                                         r_refdef.viewcache.world_leafvisible[j] = true;
 481                                         if (leaf->numleafsurfaces)
 482                                                 for (i = 0, mark = leaf->firstleafsurface;i < leaf->numleafsurfaces;i++, mark++)
 483                                                         r_refdef.viewcache.world_surfacevisible[*mark] = true;
 484                                 }
 485                         }
 486                 }
 487                 // if desired use a recursive portal flow, culling each portal to
 488                 // frustum and checking if the leaf the portal leads to is in the pvs
 489                 else
 490                 {
 491                         int leafstackpos;
 492                         mportal_t *p;
 493                         mleaf_t *leafstack[8192];
 494                         // simple-frustum portal method:
 495                         // follows portals leading outward from viewleaf, does not venture
 496                         // offscreen or into leafs that are not visible, faster than
 497                         // Quake's RecursiveWorldNode and vastly better in unvised maps,
 498                         // often culls some surfaces that pvs alone would miss
 499                         // (such as a room in pvs that is hidden behind a wall, but the
 500                         //  passage leading to the room is off-screen)
 501                         leafstack[0] = viewleaf;
 502                         leafstackpos = 1;
 503                         while (leafstackpos)
 504                         {
 505                                 leaf = leafstack[--leafstackpos];
 506                                 if (r_refdef.viewcache.world_leafvisible[leaf - model->brush.data_leafs])
 507                                         continue;
 508                                 r_refdef.stats.world_leafs++;
 509                                 r_refdef.viewcache.world_leafvisible[leaf - model->brush.data_leafs] = true;
 510                                 // mark any surfaces bounding this leaf
 511                                 if (leaf->numleafsurfaces)
 512                                         for (i = 0, mark = leaf->firstleafsurface;i < leaf->numleafsurfaces;i++, mark++)
 513                                                 r_refdef.viewcache.world_surfacevisible[*mark] = true;
 514                                 // follow portals into other leafs
 515                                 // the checks are:
 516                                 // if viewer is behind portal (portal faces outward into the scene)
 517                                 // and the portal polygon's bounding box is on the screen
 518                                 // and the leaf has not been visited yet
 519                                 // and the leaf is visible in the pvs
 520                                 // (the first two checks won't cause as many cache misses as the leaf checks)
 521                                 for (p = leaf->portals;p;p = p->next)
 522                                 {
 523                                         r_refdef.stats.world_portals++;
 524                                         if (DotProduct(r_refdef.view.origin, p->plane.normal) < (p->plane.dist + 1)
 525                                          && !r_refdef.viewcache.world_leafvisible[p->past - model->brush.data_leafs]
 526                                          && CHECKPVSBIT(r_refdef.viewcache.world_pvsbits, p->past->clusterindex)
 527                                          && !R_CullBox(p->mins, p->maxs)
 528                                          && leafstackpos < (int)(sizeof(leafstack) / sizeof(leafstack[0])))
 529                                                 leafstack[leafstackpos++] = p->past;
 530                                 }
 531                         }
 532                 }
 533         }
 534 }
 535
 536 void R_Q1BSP_DrawSky(entity_render_t *ent)
 537 {
 538         if (ent->model == NULL)
 539                 return;
 540         if (ent == r_refdef.scene.worldentity)
 541                 R_DrawWorldSurfaces(true, true, false, false, false);
 542         else
 543                 R_DrawModelSurfaces(ent, true, true, false, false, false);
 544 }
 545
 546 void R_Q1BSP_DrawAddWaterPlanes(entity_render_t *ent)
 547 {
 548         dp_model_t *model = ent->model;
 549         if (model == NULL)
 550                 return;
 551         if (ent == r_refdef.scene.worldentity)
 552                 R_DrawWorldSurfaces(false, false, false, true, false);
 553         else
 554                 R_DrawModelSurfaces(ent, false, false, false, true, false);
 555 }
 556
 557 void R_Q1BSP_Draw(entity_render_t *ent)
 558 {
 559         dp_model_t *model = ent->model;
 560         if (model == NULL)
 561                 return;
 562         if (ent == r_refdef.scene.worldentity)
 563                 R_DrawWorldSurfaces(false, true, false, false, false);
 564         else
 565                 R_DrawModelSurfaces(ent, false, true, false, false, false);
 566 }
 567
 568 void R_Q1BSP_DrawDepth(entity_render_t *ent)
 569 {
 570         dp_model_t *model = ent->model;
 571         if (model == NULL)
 572                 return;
 573         GL_ColorMask(0,0,0,0);
 574         GL_Color(1,1,1,1);
 575         GL_DepthTest(true);
 576         GL_BlendFunc(GL_ONE, GL_ZERO);
 577         GL_DepthMask(true);
 578         GL_AlphaTest(false);
 579         R_Mesh_ColorPointer(NULL, 0, 0);
 580         R_Mesh_ResetTextureState();
 581         R_SetupDepthOrShadowShader();
 582         if (ent == r_refdef.scene.worldentity)
 583                 R_DrawWorldSurfaces(false, false, true, false, false);
 584         else
 585                 R_DrawModelSurfaces(ent, false, false, true, false, false);
 586         GL_ColorMask(r_refdef.view.colormask[0], r_refdef.view.colormask[1], r_refdef.view.colormask[2], 1);
 587 }
 588
 589 void R_Q1BSP_DrawDebug(entity_render_t *ent)
 590 {
 591         if (ent->model == NULL)
 592                 return;
 593         if (ent == r_refdef.scene.worldentity)
 594                 R_DrawWorldSurfaces(false, false, false, false, true);
 595         else
 596                 R_DrawModelSurfaces(ent, false, false, false, false, true);
 597 }
 598
 599 typedef struct r_q1bsp_getlightinfo_s
 600 {
 601         dp_model_t *model;
 602         vec3_t relativelightorigin;
 603         float lightradius;
 604         int *outleaflist;
 605         unsigned char *outleafpvs;
 606         int outnumleafs;
 607         unsigned char *visitingleafpvs;
 608         int *outsurfacelist;
 609         unsigned char *outsurfacepvs;
 610         unsigned char *tempsurfacepvs;
 611         unsigned char *outshadowtrispvs;
 612         unsigned char *outlighttrispvs;
 613         int outnumsurfaces;
 614         vec3_t outmins;
 615         vec3_t outmaxs;
 616         vec3_t lightmins;
 617         vec3_t lightmaxs;
 618         const unsigned char *pvs;
 619         qboolean svbsp_active;
 620         qboolean svbsp_insertoccluder;
 621 }
 622 r_q1bsp_getlightinfo_t;
 623
 624 void R_Q1BSP_RecursiveGetLightInfo(r_q1bsp_getlightinfo_t *info, mnode_t *node)
 625 {
 626         int sides;
 627         mleaf_t *leaf;
 628         for (;;)
 629         {
 630                 mplane_t *plane = node->plane;
 631                 //if (!BoxesOverlap(info->lightmins, info->lightmaxs, node->mins, node->maxs))
 632                 //      return;
 633                 if (!plane)
 634                         break;
 635                 //if (!r_shadow_compilingrtlight && R_CullBoxCustomPlanes(node->mins, node->maxs, rsurface.rtlight_numfrustumplanes, rsurface.rtlight_frustumplanes))
 636                 //      return;
 637                 if (plane->type < 3)
 638                 {
 639                         if (info->lightmins[plane->type] > plane->dist)
 640                                 node = node->children[0];
 641                         else if (info->lightmaxs[plane->type] < plane->dist)
 642                                 node = node->children[1];
 643                         else if (info->relativelightorigin[plane->type] >= plane->dist)
 644                         {
 645                                 R_Q1BSP_RecursiveGetLightInfo(info, node->children[0]);
 646                                 node = node->children[1];
 647                         }
 648                         else
 649                         {
 650                                 R_Q1BSP_RecursiveGetLightInfo(info, node->children[1]);
 651                                 node = node->children[0];
 652                         }
 653                 }
 654                 else
 655                 {
 656                         sides = BoxOnPlaneSide(info->lightmins, info->lightmaxs, plane);
 657                         if (sides == 3)
 658                         {
 659                                 // recurse front side first because the svbsp building prefers it
 660                                 if (PlaneDist(info->relativelightorigin, plane) >= 0)
 661                                 {
 662                                         R_Q1BSP_RecursiveGetLightInfo(info, node->children[0]);
 663                                         node = node->children[1];
 664                                 }
 665                                 else
 666                                 {
 667                                         R_Q1BSP_RecursiveGetLightInfo(info, node->children[1]);
 668                                         node = node->children[0];
 669                                 }
 670                         }
 671                         else if (sides == 0)
 672                                 return; // ERROR: NAN bounding box!
 673                         else
 674                                 node = node->children[sides - 1];
 675                 }
 676         }
 677         if (!r_shadow_compilingrtlight && R_CullBoxCustomPlanes(node->mins, node->maxs, rsurface.rtlight_numfrustumplanes, rsurface.rtlight_frustumplanes))
 678                 return;
 679         leaf = (mleaf_t *)node;
 680         if (info->svbsp_active)
 681         {
 682                 int i;
 683                 mportal_t *portal;
 684                 double points[128][3];
 685                 for (portal = leaf->portals;portal;portal = portal->next)
 686                 {
 687                         for (i = 0;i < portal->numpoints;i++)
 688                                 VectorCopy(portal->points[i].position, points[i]);
 689                         if (SVBSP_AddPolygon(&r_svbsp, portal->numpoints, points[0], false, NULL, NULL, 0) & 2)
 690                                 break;
 691                 }
 692                 if (portal == NULL)
 693                         return; // no portals of this leaf visible
 694         }
 695         else
 696         {
 697                 if (r_shadow_frontsidecasting.integer && info->pvs != NULL && !CHECKPVSBIT(info->pvs, leaf->clusterindex))
 698                         return;
 699         }
 700         // inserting occluders does not alter the leaf info
 701         if (!info->svbsp_insertoccluder)
 702         {
 703                 info->outmins[0] = min(info->outmins[0], leaf->mins[0]);
 704                 info->outmins[1] = min(info->outmins[1], leaf->mins[1]);
 705                 info->outmins[2] = min(info->outmins[2], leaf->mins[2]);
 706                 info->outmaxs[0] = max(info->outmaxs[0], leaf->maxs[0]);
 707                 info->outmaxs[1] = max(info->outmaxs[1], leaf->maxs[1]);
 708                 info->outmaxs[2] = max(info->outmaxs[2], leaf->maxs[2]);
 709                 if (info->outleafpvs)
 710                 {
 711                         int leafindex = leaf - info->model->brush.data_leafs;
 712                         if (!CHECKPVSBIT(info->outleafpvs, leafindex))
 713                         {
 714                                 SETPVSBIT(info->outleafpvs, leafindex);
 715                                 info->outleaflist[info->outnumleafs++] = leafindex;
 716                         }
 717                 }
 718         }
 719         if (info->outsurfacepvs)
 720         {
 721                 int leafsurfaceindex;
 722                 int surfaceindex;
 723                 int triangleindex, t;
 724                 msurface_t *surface;
 725                 const int *e;
 726                 const vec_t *v[3];
 727                 double v2[3][3];
 728                 for (leafsurfaceindex = 0;leafsurfaceindex < leaf->numleafsurfaces;leafsurfaceindex++)
 729                 {
 730                         surfaceindex = leaf->firstleafsurface[leafsurfaceindex];
 731                         if (!CHECKPVSBIT(info->outsurfacepvs, surfaceindex))
 732                         {
 733                                 surface = info->model->data_surfaces + surfaceindex;
 734                                 if (BoxesOverlap(info->lightmins, info->lightmaxs, surface->mins, surface->maxs)
 735                                  && (!info->svbsp_insertoccluder || !(surface->texture->currentframe->currentmaterialflags & MATERIALFLAG_NOSHADOW)))
 736                                 {
 737                                         qboolean addedtris = false;
 738                                         qboolean insidebox = BoxInsideBox(surface->mins, surface->maxs, info->lightmins, info->lightmaxs);
 739                                         for (triangleindex = 0, t = surface->num_firstshadowmeshtriangle, e = info->model->brush.shadowmesh->element3i + t * 3;triangleindex < surface->num_triangles;triangleindex++, t++, e += 3)
 740                                         {
 741                                                 v[0] = info->model->brush.shadowmesh->vertex3f + e[0] * 3;
 742                                                 v[1] = info->model->brush.shadowmesh->vertex3f + e[1] * 3;
 743                                                 v[2] = info->model->brush.shadowmesh->vertex3f + e[2] * 3;
 744                                                 if (insidebox || TriangleOverlapsBox(v[0], v[1], v[2], info->lightmins, info->lightmaxs))
 745                                                 {
 746                                                         if (info->svbsp_insertoccluder)
 747                                                         {
 748                                                                 if (!(surface->texture->currentframe->currentmaterialflags & MATERIALFLAG_NOCULLFACE) && r_shadow_frontsidecasting.integer != PointInfrontOfTriangle(info->relativelightorigin, v[0], v[1], v[2]))
 749                                                                         continue;
 750                                                                 if (surface->texture->currentframe->currentmaterialflags & MATERIALFLAG_NOSHADOW)
 751                                                                         continue;
 752                                                                 VectorCopy(v[0], v2[0]);
 753                                                                 VectorCopy(v[1], v2[1]);
 754                                                                 VectorCopy(v[2], v2[2]);
 755                                                                 if (!(SVBSP_AddPolygon(&r_svbsp, 3, v2[0], true, NULL, NULL, 0) & 2))
 756                                                                         continue;
 757                                                                 addedtris = true;
 758                                                         }
 759                                                         else
 760                                                         {
 761                                                                 if (info->svbsp_active)
 762                                                                 {
 763                                                                         VectorCopy(v[0], v2[0]);
 764                                                                         VectorCopy(v[1], v2[1]);
 765                                                                         VectorCopy(v[2], v2[2]);
 766                                                                         if (!(SVBSP_AddPolygon(&r_svbsp, 3, v2[0], false, NULL, NULL, 0) & 2))
 767                                                                                 continue;
 768                                                                 }
 769                                                                 if (surface->texture->currentframe->currentmaterialflags & MATERIALFLAG_NOCULLFACE)
 770                                                                 {
 771                                                                         // if the material is double sided we
 772                                                                         // can't cull by direction
 773                                                                         SETPVSBIT(info->outlighttrispvs, t);
 774                                                                         addedtris = true;
 775                                                                         if (!(surface->texture->currentframe->currentmaterialflags & MATERIALFLAG_NOSHADOW))
 776                                                                                 SETPVSBIT(info->outshadowtrispvs, t);
 777                                                                 }
 778                                                                 else if (r_shadow_frontsidecasting.integer)
 779                                                                 {
 780                                                                         // front side casting occludes backfaces,
 781                                                                         // so they are completely useless as both
 782                                                                         // casters and lit polygons
 783                                                                         if (!PointInfrontOfTriangle(info->relativelightorigin, v[0], v[1], v[2]))
 784                                                                                 continue;
 785                                                                         SETPVSBIT(info->outlighttrispvs, t);
 786                                                                         addedtris = true;
 787                                                                         if (!(surface->texture->currentframe->currentmaterialflags & MATERIALFLAG_NOSHADOW))
 788                                                                                 SETPVSBIT(info->outshadowtrispvs, t);
 789                                                                 }
 790                                                                 else
 791                                                                 {
 792                                                                         // back side casting does not occlude
 793                                                                         // anything so we can't cull lit polygons
 794                                                                         SETPVSBIT(info->outlighttrispvs, t);
 795                                                                         addedtris = true;
 796                                                                         if (!PointInfrontOfTriangle(info->relativelightorigin, v[0], v[1], v[2]) && !(surface->texture->currentframe->currentmaterialflags & MATERIALFLAG_NOSHADOW))
 797                                                                                 SETPVSBIT(info->outshadowtrispvs, t);
 798                                                                 }
 799                                                         }
 800                                                 }
 801                                         }
 802                                         if (addedtris)
 803                                         {
 804                                                 SETPVSBIT(info->outsurfacepvs, surfaceindex);
 805                                                 info->outsurfacelist[info->outnumsurfaces++] = surfaceindex;
 806                                         }
 807                                 }
 808                         }
 809                 }
 810         }
 811 }
 812
 813 void R_Q1BSP_CallRecursiveGetLightInfo(r_q1bsp_getlightinfo_t *info, qboolean use_svbsp)
 814 {
 815         if (use_svbsp)
 816         {
 817                 double origin[3];
 818                 VectorCopy(info->relativelightorigin, origin);
 819                 if (!r_svbsp.nodes)
 820                 {
 821                         r_svbsp.maxnodes = max(r_svbsp.maxnodes, 1<<18);
 822                         r_svbsp.nodes = (svbsp_node_t*) Mem_Alloc(r_main_mempool, r_svbsp.maxnodes * sizeof(svbsp_node_t));
 823                 }
 824                 info->svbsp_active = true;
 825                 info->svbsp_insertoccluder = true;
 826                 for (;;)
 827                 {
 828                         SVBSP_Init(&r_svbsp, origin, r_svbsp.maxnodes, r_svbsp.nodes);
 829                         R_Q1BSP_RecursiveGetLightInfo(info, info->model->brush.data_nodes);
 830                         // if that failed, retry with more nodes
 831                         if (r_svbsp.ranoutofnodes)
 832                         {
 833                                 // an upper limit is imposed
 834                                 if (r_svbsp.maxnodes >= 2<<22)
 835                                         break;
 836                                 Mem_Free(r_svbsp.nodes);
 837                                 r_svbsp.maxnodes *= 2;
 838                                 r_svbsp.nodes = (svbsp_node_t*) Mem_Alloc(tempmempool, r_svbsp.maxnodes * sizeof(svbsp_node_t));
 839                         }
 840                         else
 841                                 break;
 842                 }
 843                 // now clear the surfacepvs array because we need to redo it
 844                 memset(info->outsurfacepvs, 0, (info->model->nummodelsurfaces + 7) >> 3);
 845                 info->outnumsurfaces = 0;
 846         }
 847         else
 848                 info->svbsp_active = false;
 849
 850         // we HAVE to mark the leaf the light is in as lit, because portals are
 851         // irrelevant to a leaf that the light source is inside of
 852         // (and they are all facing away, too)
 853         {
 854                 mnode_t *node = info->model->brush.data_nodes;
 855                 mleaf_t *leaf;
 856                 while (node->plane)
 857                         node = node->children[(node->plane->type < 3 ? info->relativelightorigin[node->plane->type] : DotProduct(info->relativelightorigin,node->plane->normal)) < node->plane->dist];
 858                 leaf = (mleaf_t *)node;
 859                 info->outmins[0] = min(info->outmins[0], leaf->mins[0]);
 860                 info->outmins[1] = min(info->outmins[1], leaf->mins[1]);
 861                 info->outmins[2] = min(info->outmins[2], leaf->mins[2]);
 862                 info->outmaxs[0] = max(info->outmaxs[0], leaf->maxs[0]);
 863                 info->outmaxs[1] = max(info->outmaxs[1], leaf->maxs[1]);
 864                 info->outmaxs[2] = max(info->outmaxs[2], leaf->maxs[2]);
 865                 if (info->outleafpvs)
 866                 {
 867                         int leafindex = leaf - info->model->brush.data_leafs;
 868                         if (!CHECKPVSBIT(info->outleafpvs, leafindex))
 869                         {
 870                                 SETPVSBIT(info->outleafpvs, leafindex);
 871                                 info->outleaflist[info->outnumleafs++] = leafindex;
 872                         }
 873                 }
 874         }
 875
 876         info->svbsp_insertoccluder = false;
 877         R_Q1BSP_RecursiveGetLightInfo(info, info->model->brush.data_nodes);
 878         if (developer.integer >= 100 && use_svbsp)
 879         {
 880                 Con_Printf("GetLightInfo: svbsp built with %i nodes, polygon stats:\n", r_svbsp.numnodes);
 881                 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);
 882                 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);
 883         }
 884 }
 885
 886 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)
 887 {
 888         r_q1bsp_getlightinfo_t info;
 889         VectorCopy(relativelightorigin, info.relativelightorigin);
 890         info.lightradius = lightradius;
 891         info.lightmins[0] = info.relativelightorigin[0] - info.lightradius;
 892         info.lightmins[1] = info.relativelightorigin[1] - info.lightradius;
 893         info.lightmins[2] = info.relativelightorigin[2] - info.lightradius;
 894         info.lightmaxs[0] = info.relativelightorigin[0] + info.lightradius;
 895         info.lightmaxs[1] = info.relativelightorigin[1] + info.lightradius;
 896         info.lightmaxs[2] = info.relativelightorigin[2] + info.lightradius;
 897         if (ent->model == NULL)
 898         {
 899                 VectorCopy(info.lightmins, outmins);
 900                 VectorCopy(info.lightmaxs, outmaxs);
 901                 *outnumleafspointer = 0;
 902                 *outnumsurfacespointer = 0;
 903                 return;
 904         }
 905         info.model = ent->model;
 906         info.outleaflist = outleaflist;
 907         info.outleafpvs = outleafpvs;
 908         info.outnumleafs = 0;
 909         info.visitingleafpvs = visitingleafpvs;
 910         info.outsurfacelist = outsurfacelist;
 911         info.outsurfacepvs = outsurfacepvs;
 912         info.outshadowtrispvs = outshadowtrispvs;
 913         info.outlighttrispvs = outlighttrispvs;
 914         info.outnumsurfaces = 0;
 915         VectorCopy(info.relativelightorigin, info.outmins);
 916         VectorCopy(info.relativelightorigin, info.outmaxs);
 917         memset(visitingleafpvs, 0, (info.model->brush.num_leafs + 7) >> 3);
 918         memset(outleafpvs, 0, (info.model->brush.num_leafs + 7) >> 3);
 919         memset(outsurfacepvs, 0, (info.model->nummodelsurfaces + 7) >> 3);
 920         if (info.model->brush.shadowmesh)
 921                 memset(outshadowtrispvs, 0, (info.model->brush.shadowmesh->numtriangles + 7) >> 3);
 922         else
 923                 memset(outshadowtrispvs, 0, (info.model->surfmesh.num_triangles + 7) >> 3);
 924         memset(outlighttrispvs, 0, (info.model->surfmesh.num_triangles + 7) >> 3);
 925         if (info.model->brush.GetPVS && r_shadow_frontsidecasting.integer)
 926                 info.pvs = info.model->brush.GetPVS(info.model, info.relativelightorigin);
 927         else
 928                 info.pvs = NULL;
 929         R_UpdateAllTextureInfo(ent);
 930
 931         if (r_shadow_frontsidecasting.integer && r_shadow_compilingrtlight && r_shadow_realtime_world_compileportalculling.integer && info.model->brush.data_portals)
 932         {
 933                 // use portal recursion for exact light volume culling, and exact surface checking
 934                 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);
 935         }
 936         else if (r_shadow_frontsidecasting.integer && r_shadow_realtime_dlight_portalculling.integer && info.model->brush.data_portals)
 937         {
 938                 // use portal recursion for exact light volume culling, but not the expensive exact surface checking
 939                 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);
 940         }
 941         else
 942         {
 943                 // recurse the bsp tree, checking leafs and surfaces for visibility
 944                 // optionally using svbsp for exact culling of compiled lights
 945                 // (or if the user enables dlight svbsp culling, which is mostly for
 946                 //  debugging not actual use)
 947                 R_Q1BSP_CallRecursiveGetLightInfo(&info, r_shadow_compilingrtlight ? r_shadow_realtime_world_compilesvbsp.integer : r_shadow_realtime_dlight_svbspculling.integer);
 948         }
 949
 950         // limit combined leaf box to light boundaries
 951         outmins[0] = max(info.outmins[0] - 1, info.lightmins[0]);
 952         outmins[1] = max(info.outmins[1] - 1, info.lightmins[1]);
 953         outmins[2] = max(info.outmins[2] - 1, info.lightmins[2]);
 954         outmaxs[0] = min(info.outmaxs[0] + 1, info.lightmaxs[0]);
 955         outmaxs[1] = min(info.outmaxs[1] + 1, info.lightmaxs[1]);
 956         outmaxs[2] = min(info.outmaxs[2] + 1, info.lightmaxs[2]);
 957
 958         *outnumleafspointer = info.outnumleafs;
 959         *outnumsurfacespointer = info.outnumsurfaces;
 960 }
 961
 962 void R_Q1BSP_CompileShadowVolume(entity_render_t *ent, vec3_t relativelightorigin, vec3_t relativelightdirection, float lightradius, int numsurfaces, const int *surfacelist)
 963 {
 964         dp_model_t *model = ent->model;
 965         msurface_t *surface;
 966         int surfacelistindex;
 967         float projectdistance = relativelightdirection ? lightradius : lightradius + model->radius*2 + r_shadow_projectdistance.value;
 968         r_shadow_compilingrtlight->static_meshchain_shadow_zfail = Mod_ShadowMesh_Begin(r_main_mempool, 32768, 32768, NULL, NULL, NULL, false, false, true);
 969         R_Shadow_PrepareShadowMark(model->brush.shadowmesh->numtriangles);
 970         for (surfacelistindex = 0;surfacelistindex < numsurfaces;surfacelistindex++)
 971         {
 972                 surface = model->data_surfaces + surfacelist[surfacelistindex];
 973                 if (surface->texture->currentframe->basematerialflags & MATERIALFLAG_NOSHADOW)
 974                         continue;
 975                 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);
 976         }
 977         R_Shadow_VolumeFromList(model->brush.shadowmesh->numverts, model->brush.shadowmesh->numtriangles, model->brush.shadowmesh->vertex3f, model->brush.shadowmesh->element3i, model->brush.shadowmesh->neighbor3i, relativelightorigin, relativelightdirection, projectdistance, numshadowmark, shadowmarklist, ent->mins, ent->maxs);
 978         r_shadow_compilingrtlight->static_meshchain_shadow_zfail = Mod_ShadowMesh_Finish(r_main_mempool, r_shadow_compilingrtlight->static_meshchain_shadow_zfail, false, false, true);
 979 }
 980
 981 extern cvar_t r_polygonoffset_submodel_factor;
 982 extern cvar_t r_polygonoffset_submodel_offset;
 983 void R_Q1BSP_DrawShadowVolume(entity_render_t *ent, const vec3_t relativelightorigin, const vec3_t relativelightdirection, float lightradius, int modelnumsurfaces, const int *modelsurfacelist, const vec3_t lightmins, const vec3_t lightmaxs)
 984 {
 985         dp_model_t *model = ent->model;
 986         msurface_t *surface;
 987         int modelsurfacelistindex;
 988         float projectdistance = relativelightdirection ? lightradius : lightradius + model->radius*2 + r_shadow_projectdistance.value;
 989         // check the box in modelspace, it was already checked in worldspace
 990         if (!BoxesOverlap(model->normalmins, model->normalmaxs, lightmins, lightmaxs))
 991                 return;
 992         R_UpdateAllTextureInfo(ent);
 993         if (ent->model->brush.submodel)
 994                 GL_PolygonOffset(r_refdef.shadowpolygonfactor + r_polygonoffset_submodel_factor.value, r_refdef.shadowpolygonoffset + r_polygonoffset_submodel_offset.value);
 995         if (model->brush.shadowmesh)
 996         {
 997                 R_Shadow_PrepareShadowMark(model->brush.shadowmesh->numtriangles);
 998                 for (modelsurfacelistindex = 0;modelsurfacelistindex < modelnumsurfaces;modelsurfacelistindex++)
 999                 {
1000                         surface = model->data_surfaces + modelsurfacelist[modelsurfacelistindex];
1001                         if (surface->texture->currentframe->currentmaterialflags & MATERIALFLAG_NOSHADOW)
1002                                 continue;
1003                         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);
1004                 }
1005                 R_Shadow_VolumeFromList(model->brush.shadowmesh->numverts, model->brush.shadowmesh->numtriangles, model->brush.shadowmesh->vertex3f, model->brush.shadowmesh->element3i, model->brush.shadowmesh->neighbor3i, relativelightorigin, relativelightdirection, projectdistance, numshadowmark, shadowmarklist, ent->mins, ent->maxs);
1006         }
1007         else
1008         {
1009                 projectdistance = lightradius + model->radius*2;
1010                 R_Shadow_PrepareShadowMark(model->surfmesh.num_triangles);
1011                 // identify lit faces within the bounding box
1012                 for (modelsurfacelistindex = 0;modelsurfacelistindex < modelnumsurfaces;modelsurfacelistindex++)
1013                 {
1014                         surface = model->data_surfaces + modelsurfacelist[modelsurfacelistindex];
1015                         rsurface.texture = surface->texture->currentframe;
1016                         if (rsurface.texture->currentmaterialflags & MATERIALFLAG_NOSHADOW)
1017                                 continue;
1018                         RSurf_PrepareVerticesForBatch(false, false, 1, &surface);
1019                         R_Shadow_MarkVolumeFromBox(surface->num_firsttriangle, surface->num_triangles, rsurface.vertex3f, rsurface.modelelement3i, relativelightorigin, relativelightdirection, lightmins, lightmaxs, surface->mins, surface->maxs);
1020                 }
1021                 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, ent->mins, ent->maxs);
1022         }
1023         if (ent->model->brush.submodel)
1024                 GL_PolygonOffset(r_refdef.shadowpolygonfactor, r_refdef.shadowpolygonoffset);
1025 }
1026
1027 #define BATCHSIZE 1024
1028
1029 static void R_Q1BSP_DrawLight_TransparentCallback(const entity_render_t *ent, const rtlight_t *rtlight, int numsurfaces, int *surfacelist)
1030 {
1031         int i, j, endsurface;
1032         texture_t *t;
1033         msurface_t *surface;
1034         // note: in practice this never actually receives batches), oh well
1035         R_Shadow_RenderMode_Begin();
1036         R_Shadow_RenderMode_ActiveLight(rtlight);
1037         R_Shadow_RenderMode_Lighting(false, true);
1038         R_Shadow_SetupEntityLight(ent);
1039         for (i = 0;i < numsurfaces;i = j)
1040         {
1041                 j = i + 1;
1042                 surface = rsurface.modelsurfaces + surfacelist[i];
1043                 t = surface->texture;
1044                 R_UpdateTextureInfo(ent, t);
1045                 rsurface.texture = t->currentframe;
1046                 endsurface = min(j + BATCHSIZE, numsurfaces);
1047                 for (j = i;j < endsurface;j++)
1048                 {
1049                         surface = rsurface.modelsurfaces + surfacelist[j];
1050                         if (t != surface->texture)
1051                                 break;
1052                         RSurf_PrepareVerticesForBatch(true, true, 1, &surface);
1053                         R_Shadow_RenderLighting(surface->num_firstvertex, surface->num_vertices, surface->num_firsttriangle, surface->num_triangles, ent->model->surfmesh.data_element3i, ent->model->surfmesh.data_element3s, ent->model->surfmesh.ebo3i, ent->model->surfmesh.ebo3s);
1054                 }
1055         }
1056         R_Shadow_RenderMode_End();
1057 }
1058
1059 #define RSURF_MAX_BATCHSURFACES 8192
1060
1061 void R_Q1BSP_DrawLight(entity_render_t *ent, int numsurfaces, const int *surfacelist, const unsigned char *trispvs)
1062 {
1063         dp_model_t *model = ent->model;
1064         msurface_t *surface;
1065         int i, k, kend, l, m, mend, endsurface, batchnumsurfaces, batchnumtriangles, batchfirstvertex, batchlastvertex, batchfirsttriangle;
1066         qboolean usebufferobject, culltriangles;
1067         const int *element3i;
1068         msurface_t *batchsurfacelist[RSURF_MAX_BATCHSURFACES];
1069         int batchelements[BATCHSIZE*3];
1070         texture_t *tex;
1071         CHECKGLERROR
1072         R_UpdateAllTextureInfo(ent);
1073         culltriangles = r_shadow_culltriangles.integer && !(ent->flags & RENDER_NOSELFSHADOW);
1074         element3i = rsurface.modelelement3i;
1075         // this is a double loop because non-visible surface skipping has to be
1076         // fast, and even if this is not the world model (and hence no visibility
1077         // checking) the input surface list and batch buffer are different formats
1078         // so some processing is necessary.  (luckily models have few surfaces)
1079         for (i = 0;i < numsurfaces;)
1080         {
1081                 batchnumsurfaces = 0;
1082                 endsurface = min(i + RSURF_MAX_BATCHSURFACES, numsurfaces);
1083                 if (ent == r_refdef.scene.worldentity)
1084                 {
1085                         for (;i < endsurface;i++)
1086                                 if (r_refdef.viewcache.world_surfacevisible[surfacelist[i]])
1087                                         batchsurfacelist[batchnumsurfaces++] = model->data_surfaces + surfacelist[i];
1088                 }
1089                 else
1090                 {
1091                         for (;i < endsurface;i++)
1092                                 batchsurfacelist[batchnumsurfaces++] = model->data_surfaces + surfacelist[i];
1093                 }
1094                 if (!batchnumsurfaces)
1095                         continue;
1096                 for (k = 0;k < batchnumsurfaces;k = kend)
1097                 {
1098                         surface = batchsurfacelist[k];
1099                         tex = surface->texture;
1100                         rsurface.texture = tex->currentframe;
1101                         // gather surfaces into a batch range
1102                         for (kend = k;kend < batchnumsurfaces && tex == batchsurfacelist[kend]->texture;kend++)
1103                                 ;
1104                         // now figure out what to do with this particular range of surfaces
1105                         if (!(rsurface.texture->currentmaterialflags & MATERIALFLAG_WALL))
1106                                 continue;
1107                         if (r_waterstate.renderingscene && (rsurface.texture->currentmaterialflags & (MATERIALFLAG_WATERSHADER | MATERIALFLAG_REFRACTION | MATERIALFLAG_REFLECTION)))
1108                                 continue;
1109                         if (rsurface.texture->currentmaterialflags & MATERIALFLAGMASK_DEPTHSORTED)
1110                         {
1111                                 vec3_t tempcenter, center;
1112                                 for (l = k;l < kend;l++)
1113                                 {
1114                                         surface = batchsurfacelist[l];
1115                                         tempcenter[0] = (surface->mins[0] + surface->maxs[0]) * 0.5f;
1116                                         tempcenter[1] = (surface->mins[1] + surface->maxs[1]) * 0.5f;
1117                                         tempcenter[2] = (surface->mins[2] + surface->maxs[2]) * 0.5f;
1118                                         Matrix4x4_Transform(&rsurface.matrix, tempcenter, center);
1119                                         R_MeshQueue_AddTransparent(rsurface.texture->currentmaterialflags & MATERIALFLAG_NODEPTHTEST ? r_refdef.view.origin : center, R_Q1BSP_DrawLight_TransparentCallback, ent, surface - rsurface.modelsurfaces, rsurface.rtlight);
1120                                 }
1121                                 continue;
1122                         }
1123                         batchnumtriangles = 0;
1124                         batchfirsttriangle = surface->num_firsttriangle;
1125                         m = 0; // hush warning
1126                         for (l = k;l < kend;l++)
1127                         {
1128                                 surface = batchsurfacelist[l];
1129                                 RSurf_PrepareVerticesForBatch(true, true, 1, &surface);
1130                                 for (m = surface->num_firsttriangle, mend = m + surface->num_triangles;m < mend;m++)
1131                                 {
1132                                         if (trispvs)
1133                                         {
1134                                                 if (!CHECKPVSBIT(trispvs, m))
1135                                                 {
1136                                                         usebufferobject = false;
1137                                                         continue;
1138                                                 }
1139                                         }
1140                                         else if (culltriangles)
1141                                         {
1142                                                 if (r_shadow_frontsidecasting.integer && !PointInfrontOfTriangle(rsurface.entitylightorigin, rsurface.vertex3f + element3i[m*3+0]*3, rsurface.vertex3f + element3i[m*3+1]*3, rsurface.vertex3f + element3i[m*3+2]*3))
1143                                                 {
1144                                                         usebufferobject = false;
1145                                                         continue;
1146                                                 }
1147                                         }
1148                                         if (batchnumtriangles >= BATCHSIZE)
1149                                         {
1150                                                 r_refdef.stats.lights_lighttriangles += batchnumtriangles;
1151                                                 Mod_VertexRangeFromElements(batchnumtriangles*3, batchelements, &batchfirstvertex, &batchlastvertex);
1152                                                 // use the element buffer if all triangles are consecutive
1153                                                 if (m == batchfirsttriangle + batchnumtriangles)
1154                                                         R_Shadow_RenderLighting(batchfirstvertex, batchlastvertex + 1 - batchfirstvertex, batchfirsttriangle, batchnumtriangles, ent->model->surfmesh.data_element3i, ent->model->surfmesh.data_element3s, ent->model->surfmesh.ebo3i, ent->model->surfmesh.ebo3s);
1155                                                 else
1156                                                         R_Shadow_RenderLighting(batchfirstvertex, batchlastvertex + 1 - batchfirstvertex, 0, batchnumtriangles, batchelements, NULL, 0, 0);
1157                                                 usebufferobject = true;
1158                                                 batchnumtriangles = 0;
1159                                                 batchfirsttriangle = m;
1160                                         }
1161                                         batchelements[batchnumtriangles*3+0] = element3i[m*3+0];
1162                                         batchelements[batchnumtriangles*3+1] = element3i[m*3+1];
1163                                         batchelements[batchnumtriangles*3+2] = element3i[m*3+2];
1164                                         batchnumtriangles++;
1165                                 }
1166                         }
1167                         if (batchnumtriangles > 0)
1168                         {
1169                                 r_refdef.stats.lights_lighttriangles += batchnumtriangles;
1170                                 Mod_VertexRangeFromElements(batchnumtriangles*3, batchelements, &batchfirstvertex, &batchlastvertex);
1171                                 // use the element buffer if all triangles are consecutive
1172                                 if (m == batchfirsttriangle + batchnumtriangles)
1173                                         R_Shadow_RenderLighting(batchfirstvertex, batchlastvertex + 1 - batchfirstvertex, batchfirsttriangle, batchnumtriangles, ent->model->surfmesh.data_element3i, ent->model->surfmesh.data_element3s, ent->model->surfmesh.ebo3i, ent->model->surfmesh.ebo3s);
1174                                 else
1175                                         R_Shadow_RenderLighting(batchfirstvertex, batchlastvertex + 1 - batchfirstvertex, 0, batchnumtriangles, batchelements, NULL, 0, 0);
1176                         }
1177                 }
1178         }
1179 }
1180
1181 //Made by [515]
1182 void R_ReplaceWorldTexture (void)
1183 {
1184         dp_model_t              *m;
1185         texture_t       *t;
1186         int                     i;
1187         const char      *r, *newt;
1188         skinframe_t *skinframe;
1189         if (!r_refdef.scene.worldmodel)
1190         {
1191                 Con_Printf("There is no worldmodel\n");
1192                 return;
1193         }
1194         m = r_refdef.scene.worldmodel;
1195
1196         if(Cmd_Argc() < 2)
1197         {
1198                 Con_Print("r_replacemaptexture <texname> <newtexname> - replaces texture\n");
1199                 Con_Print("r_replacemaptexture <texname> - switch back to default texture\n");
1200                 return;
1201         }
1202         if(!cl.islocalgame || !cl.worldmodel)
1203         {
1204                 Con_Print("This command works only in singleplayer\n");
1205                 return;
1206         }
1207         r = Cmd_Argv(1);
1208         newt = Cmd_Argv(2);
1209         if(!newt[0])
1210                 newt = r;
1211         for(i=0,t=m->data_textures;i<m->num_textures;i++,t++)
1212         {
1213                 if(/*t->width && !strcasecmp(t->name, r)*/ matchpattern( t->name, r, true ) )
1214                 {
1215                         if ((skinframe = R_SkinFrame_LoadExternal(newt, TEXF_MIPMAP | TEXF_ALPHA | TEXF_PRECACHE | TEXF_PICMIP, true)))
1216                         {
1217 //                              t->skinframes[0] = skinframe;
1218                                 t->currentskinframe = skinframe;
1219                                 t->currentskinframe = skinframe;
1220                                 Con_Printf("%s replaced with %s\n", r, newt);
1221                         }
1222                         else
1223                         {
1224                                 Con_Printf("%s was not found\n", newt);
1225                                 return;
1226                         }
1227                 }
1228         }
1229 }
1230
1231 //Made by [515]
1232 void R_ListWorldTextures (void)
1233 {
1234         dp_model_t              *m;
1235         texture_t       *t;
1236         int                     i;
1237         if (!r_refdef.scene.worldmodel)
1238         {
1239                 Con_Printf("There is no worldmodel\n");
1240                 return;
1241         }
1242         m = r_refdef.scene.worldmodel;
1243
1244         Con_Print("Worldmodel textures :\n");
1245         for(i=0,t=m->data_textures;i<m->num_textures;i++,t++)
1246                 if (t->numskinframes)
1247                         Con_Printf("%s\n", t->name);
1248 }
1249
1250 #if 0
1251 static void gl_surf_start(void)
1252 {
1253 }
1254
1255 static void gl_surf_shutdown(void)
1256 {
1257 }
1258
1259 static void gl_surf_newmap(void)
1260 {
1261 }
1262 #endif
1263
1264 void GL_Surf_Init(void)
1265 {
1266
1267         Cvar_RegisterVariable(&r_ambient);
1268         Cvar_RegisterVariable(&r_lockpvs);
1269         Cvar_RegisterVariable(&r_lockvisibility);
1270         Cvar_RegisterVariable(&r_useportalculling);
1271         Cvar_RegisterVariable(&r_q3bsp_renderskydepth);
1272
1273         Cmd_AddCommand ("r_replacemaptexture", R_ReplaceWorldTexture, "override a map texture for testing purposes");
1274         Cmd_AddCommand ("r_listmaptextures", R_ListWorldTextures, "list all textures used by the current map");
1275
1276         //R_RegisterModule("GL_Surf", gl_surf_start, gl_surf_shutdown, gl_surf_newmap);
1277 }
1278