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
  25 #define MAX_LIGHTMAP_SIZE 256
  26
  27 static unsigned int intblocklights[MAX_LIGHTMAP_SIZE*MAX_LIGHTMAP_SIZE*3]; // LordHavoc: *3 for colored lighting
  28 static float floatblocklights[MAX_LIGHTMAP_SIZE*MAX_LIGHTMAP_SIZE*3]; // LordHavoc: *3 for colored lighting
  29
  30 static qbyte templight[MAX_LIGHTMAP_SIZE*MAX_LIGHTMAP_SIZE*4];
  31
  32 cvar_t r_ambient = {0, "r_ambient", "0"};
  33 cvar_t r_vertexsurfaces = {0, "r_vertexsurfaces", "0"};
  34 cvar_t r_dlightmap = {CVAR_SAVE, "r_dlightmap", "1"};
  35 cvar_t r_drawportals = {0, "r_drawportals", "0"};
  36 cvar_t r_testvis = {0, "r_testvis", "0"};
  37 cvar_t r_floatbuildlightmap = {0, "r_floatbuildlightmap", "0"};
  38 cvar_t r_detailtextures = {CVAR_SAVE, "r_detailtextures", "1"};
  39 cvar_t r_surfaceworldnode = {0, "r_surfaceworldnode", "1"};
  40
  41 static int dlightdivtable[32768];
  42
  43 static int R_IntAddDynamicLights (const matrix4x4_t *matrix, msurface_t *surf)
  44 {
  45         int sdtable[256], lnum, td, maxdist, maxdist2, maxdist3, i, s, t, smax, tmax, smax3, red, green, blue, lit, dist2, impacts, impactt, subtract, k;
  46         unsigned int *bl;
  47         float dist, impact[3], local[3];
  48
  49         lit = false;
  50
  51         smax = (surf->extents[0] >> 4) + 1;
  52         tmax = (surf->extents[1] >> 4) + 1;
  53         smax3 = smax * 3;
  54
  55         for (lnum = 0; lnum < r_numdlights; lnum++)
  56         {
  57                 if (!(surf->dlightbits[lnum >> 5] & (1 << (lnum & 31))))
  58                         continue;                                       // not lit by this light
  59
  60                 Matrix4x4_Transform(matrix, r_dlight[lnum].origin, local);
  61                 dist = DotProduct (local, surf->plane->normal) - surf->plane->dist;
  62
  63                 // for comparisons to minimum acceptable light
  64                 // compensate for LIGHTOFFSET
  65                 maxdist = (int) r_dlight[lnum].cullradius2 + LIGHTOFFSET;
  66
  67                 dist2 = dist * dist;
  68                 dist2 += LIGHTOFFSET;
  69                 if (dist2 >= maxdist)
  70                         continue;
  71
  72                 if (surf->plane->type < 3)
  73                 {
  74                         VectorCopy(local, impact);
  75                         impact[surf->plane->type] -= dist;
  76                 }
  77                 else
  78                 {
  79                         impact[0] = local[0] - surf->plane->normal[0] * dist;
  80                         impact[1] = local[1] - surf->plane->normal[1] * dist;
  81                         impact[2] = local[2] - surf->plane->normal[2] * dist;
  82                 }
  83
  84                 impacts = DotProduct (impact, surf->texinfo->vecs[0]) + surf->texinfo->vecs[0][3] - surf->texturemins[0];
  85                 impactt = DotProduct (impact, surf->texinfo->vecs[1]) + surf->texinfo->vecs[1][3] - surf->texturemins[1];
  86
  87                 s = bound(0, impacts, smax * 16) - impacts;
  88                 t = bound(0, impactt, tmax * 16) - impactt;
  89                 i = s * s + t * t + dist2;
  90                 if (i > maxdist)
  91                         continue;
  92
  93                 // reduce calculations
  94                 for (s = 0, i = impacts; s < smax; s++, i -= 16)
  95                         sdtable[s] = i * i + dist2;
  96
  97                 maxdist3 = maxdist - dist2;
  98
  99                 // convert to 8.8 blocklights format
 100                 red = r_dlight[lnum].light[0] * (1.0f / 128.0f);
 101                 green = r_dlight[lnum].light[1] * (1.0f / 128.0f);
 102                 blue = r_dlight[lnum].light[2] * (1.0f / 128.0f);
 103                 subtract = (int) (r_dlight[lnum].subtract * 4194304.0f);
 104                 bl = intblocklights;
 105
 106                 i = impactt;
 107                 for (t = 0;t < tmax;t++, i -= 16)
 108                 {
 109                         td = i * i;
 110                         // make sure some part of it is visible on this line
 111                         if (td < maxdist3)
 112                         {
 113                                 maxdist2 = maxdist - td;
 114                                 for (s = 0;s < smax;s++)
 115                                 {
 116                                         if (sdtable[s] < maxdist2)
 117                                         {
 118                                                 k = dlightdivtable[(sdtable[s] + td) >> 7] - subtract;
 119                                                 if (k > 0)
 120                                                 {
 121                                                         bl[0] += (red   * k);
 122                                                         bl[1] += (green * k);
 123                                                         bl[2] += (blue  * k);
 124                                                         lit = true;
 125                                                 }
 126                                         }
 127                                         bl += 3;
 128                                 }
 129                         }
 130                         else // skip line
 131                                 bl += smax3;
 132                 }
 133         }
 134         return lit;
 135 }
 136
 137 static int R_FloatAddDynamicLights (const matrix4x4_t *matrix, msurface_t *surf)
 138 {
 139         int lnum, s, t, smax, tmax, smax3, lit, impacts, impactt;
 140         float sdtable[256], *bl, k, dist, dist2, maxdist, maxdist2, maxdist3, td1, td, red, green, blue, impact[3], local[3], subtract;
 141
 142         lit = false;
 143
 144         smax = (surf->extents[0] >> 4) + 1;
 145         tmax = (surf->extents[1] >> 4) + 1;
 146         smax3 = smax * 3;
 147
 148         for (lnum = 0; lnum < r_numdlights; lnum++)
 149         {
 150                 if (!(surf->dlightbits[lnum >> 5] & (1 << (lnum & 31))))
 151                         continue;                                       // not lit by this light
 152
 153                 Matrix4x4_Transform(matrix, r_dlight[lnum].origin, local);
 154                 dist = DotProduct (local, surf->plane->normal) - surf->plane->dist;
 155
 156                 // for comparisons to minimum acceptable light
 157                 // compensate for LIGHTOFFSET
 158                 maxdist = (int) r_dlight[lnum].cullradius2 + LIGHTOFFSET;
 159
 160                 dist2 = dist * dist;
 161                 dist2 += LIGHTOFFSET;
 162                 if (dist2 >= maxdist)
 163                         continue;
 164
 165                 if (surf->plane->type < 3)
 166                 {
 167                         VectorCopy(local, impact);
 168                         impact[surf->plane->type] -= dist;
 169                 }
 170                 else
 171                 {
 172                         impact[0] = local[0] - surf->plane->normal[0] * dist;
 173                         impact[1] = local[1] - surf->plane->normal[1] * dist;
 174                         impact[2] = local[2] - surf->plane->normal[2] * dist;
 175                 }
 176
 177                 impacts = DotProduct (impact, surf->texinfo->vecs[0]) + surf->texinfo->vecs[0][3] - surf->texturemins[0];
 178                 impactt = DotProduct (impact, surf->texinfo->vecs[1]) + surf->texinfo->vecs[1][3] - surf->texturemins[1];
 179
 180                 td = bound(0, impacts, smax * 16) - impacts;
 181                 td1 = bound(0, impactt, tmax * 16) - impactt;
 182                 td = td * td + td1 * td1 + dist2;
 183                 if (td > maxdist)
 184                         continue;
 185
 186                 // reduce calculations
 187                 for (s = 0, td1 = impacts; s < smax; s++, td1 -= 16.0f)
 188                         sdtable[s] = td1 * td1 + dist2;
 189
 190                 maxdist3 = maxdist - dist2;
 191
 192                 // convert to 8.8 blocklights format
 193                 red = r_dlight[lnum].light[0];
 194                 green = r_dlight[lnum].light[1];
 195                 blue = r_dlight[lnum].light[2];
 196                 subtract = r_dlight[lnum].subtract * 32768.0f;
 197                 bl = floatblocklights;
 198
 199                 td1 = impactt;
 200                 for (t = 0;t < tmax;t++, td1 -= 16.0f)
 201                 {
 202                         td = td1 * td1;
 203                         // make sure some part of it is visible on this line
 204                         if (td < maxdist3)
 205                         {
 206                                 maxdist2 = maxdist - td;
 207                                 for (s = 0;s < smax;s++)
 208                                 {
 209                                         if (sdtable[s] < maxdist2)
 210                                         {
 211                                                 k = (32768.0f / (sdtable[s] + td)) - subtract;
 212                                                 bl[0] += red   * k;
 213                                                 bl[1] += green * k;
 214                                                 bl[2] += blue  * k;
 215                                                 lit = true;
 216                                         }
 217                                         bl += 3;
 218                                 }
 219                         }
 220                         else // skip line
 221                                 bl += smax3;
 222                 }
 223         }
 224         return lit;
 225 }
 226
 227 /*
 228 ===============
 229 R_BuildLightMap
 230
 231 Combine and scale multiple lightmaps into the 8.8 format in blocklights
 232 ===============
 233 */
 234 static void R_BuildLightMap (const entity_render_t *ent, msurface_t *surf)
 235 {
 236         if (!r_floatbuildlightmap.integer)
 237         {
 238                 int smax, tmax, i, j, size, size3, shift, maps, stride, l;
 239                 unsigned int *bl, scale;
 240                 qbyte *lightmap, *out, *stain;
 241
 242                 // update cached lighting info
 243                 surf->cached_dlight = 0;
 244
 245                 smax = (surf->extents[0]>>4)+1;
 246                 tmax = (surf->extents[1]>>4)+1;
 247                 size = smax*tmax;
 248                 size3 = size*3;
 249                 lightmap = surf->samples;
 250
 251         // set to full bright if no light data
 252                 bl = intblocklights;
 253                 if ((ent->effects & EF_FULLBRIGHT) || !ent->model->lightdata)
 254                 {
 255                         for (i = 0;i < size3;i++)
 256                                 bl[i] = 255*256;
 257                 }
 258                 else
 259                 {
 260         // clear to no light
 261                         j = r_ambient.value * 512.0f; // would be 128.0f logically, but using 512.0f to match winquake style
 262                         if (j)
 263                         {
 264                                 for (i = 0;i < size3;i++)
 265                                         *bl++ = j;
 266                         }
 267                         else
 268                                 memset(bl, 0, size*3*sizeof(unsigned int));
 269
 270                         if (surf->dlightframe == r_framecount && r_dlightmap.integer)
 271                         {
 272                                 surf->cached_dlight = R_IntAddDynamicLights(&ent->inversematrix, surf);
 273                                 if (surf->cached_dlight)
 274                                         c_light_polys++;
 275                         }
 276
 277         // add all the lightmaps
 278                         if (lightmap)
 279                         {
 280                                 bl = intblocklights;
 281                                 for (maps = 0;maps < MAXLIGHTMAPS && surf->styles[maps] != 255;maps++, lightmap += size3)
 282                                         for (scale = d_lightstylevalue[surf->styles[maps]], i = 0;i < size3;i++)
 283                                                 bl[i] += lightmap[i] * scale;
 284                         }
 285                 }
 286
 287                 stain = surf->stainsamples;
 288                 bl = intblocklights;
 289                 out = templight;
 290                 // deal with lightmap brightness scale
 291                 shift = 7 + r_lightmapscalebit + 8;
 292                 if (ent->model->lightmaprgba)
 293                 {
 294                         stride = (surf->lightmaptexturestride - smax) * 4;
 295                         for (i = 0;i < tmax;i++, out += stride)
 296                         {
 297                                 for (j = 0;j < smax;j++)
 298                                 {
 299                                         l = (*bl++ * *stain++) >> shift;*out++ = min(l, 255);
 300                                         l = (*bl++ * *stain++) >> shift;*out++ = min(l, 255);
 301                                         l = (*bl++ * *stain++) >> shift;*out++ = min(l, 255);
 302                                         *out++ = 255;
 303                                 }
 304                         }
 305                 }
 306                 else
 307                 {
 308                         stride = (surf->lightmaptexturestride - smax) * 3;
 309                         for (i = 0;i < tmax;i++, out += stride)
 310                         {
 311                                 for (j = 0;j < smax;j++)
 312                                 {
 313                                         l = (*bl++ * *stain++) >> shift;*out++ = min(l, 255);
 314                                         l = (*bl++ * *stain++) >> shift;*out++ = min(l, 255);
 315                                         l = (*bl++ * *stain++) >> shift;*out++ = min(l, 255);
 316                                 }
 317                         }
 318                 }
 319
 320                 R_UpdateTexture(surf->lightmaptexture, templight);
 321         }
 322         else
 323         {
 324                 int smax, tmax, i, j, size, size3, maps, stride, l;
 325                 float *bl, scale;
 326                 qbyte *lightmap, *out, *stain;
 327
 328                 // update cached lighting info
 329                 surf->cached_dlight = 0;
 330
 331                 smax = (surf->extents[0]>>4)+1;
 332                 tmax = (surf->extents[1]>>4)+1;
 333                 size = smax*tmax;
 334                 size3 = size*3;
 335                 lightmap = surf->samples;
 336
 337         // set to full bright if no light data
 338                 bl = floatblocklights;
 339                 if ((ent->effects & EF_FULLBRIGHT) || !ent->model->lightdata)
 340                         j = 255*256;
 341                 else
 342                         j = r_ambient.value * 512.0f; // would be 128.0f logically, but using 512.0f to match winquake style
 343
 344                 // clear to no light
 345                 if (j)
 346                 {
 347                         for (i = 0;i < size3;i++)
 348                                 *bl++ = j;
 349                 }
 350                 else
 351                         memset(bl, 0, size*3*sizeof(float));
 352
 353                 if (surf->dlightframe == r_framecount && r_dlightmap.integer)
 354                 {
 355                         surf->cached_dlight = R_FloatAddDynamicLights(&ent->inversematrix, surf);
 356                         if (surf->cached_dlight)
 357                                 c_light_polys++;
 358                 }
 359
 360                 // add all the lightmaps
 361                 if (lightmap)
 362                 {
 363                         bl = floatblocklights;
 364                         for (maps = 0;maps < MAXLIGHTMAPS && surf->styles[maps] != 255;maps++, lightmap += size3)
 365                                 for (scale = d_lightstylevalue[surf->styles[maps]], i = 0;i < size3;i++)
 366                                         bl[i] += lightmap[i] * scale;
 367                 }
 368
 369                 stain = surf->stainsamples;
 370                 bl = floatblocklights;
 371                 out = templight;
 372                 // deal with lightmap brightness scale
 373                 scale = 1.0f / (1 << (7 + r_lightmapscalebit + 8));
 374                 if (ent->model->lightmaprgba)
 375                 {
 376                         stride = (surf->lightmaptexturestride - smax) * 4;
 377                         for (i = 0;i < tmax;i++, out += stride)
 378                         {
 379                                 for (j = 0;j < smax;j++)
 380                                 {
 381                                         l = *bl++ * *stain++ * scale;*out++ = min(l, 255);
 382                                         l = *bl++ * *stain++ * scale;*out++ = min(l, 255);
 383                                         l = *bl++ * *stain++ * scale;*out++ = min(l, 255);
 384                                         *out++ = 255;
 385                                 }
 386                         }
 387                 }
 388                 else
 389                 {
 390                         stride = (surf->lightmaptexturestride - smax) * 3;
 391                         for (i = 0;i < tmax;i++, out += stride)
 392                         {
 393                                 for (j = 0;j < smax;j++)
 394                                 {
 395                                         l = *bl++ * *stain++ * scale;*out++ = min(l, 255);
 396                                         l = *bl++ * *stain++ * scale;*out++ = min(l, 255);
 397                                         l = *bl++ * *stain++ * scale;*out++ = min(l, 255);
 398                                 }
 399                         }
 400                 }
 401
 402                 R_UpdateTexture(surf->lightmaptexture, templight);
 403         }
 404 }
 405
 406 void R_StainNode (mnode_t *node, model_t *model, const vec3_t origin, float radius, const float fcolor[8])
 407 {
 408         float ndist, a, ratio, maxdist, maxdist2, maxdist3, invradius, sdtable[256], td, dist2;
 409         msurface_t *surf, *endsurf;
 410         int i, s, t, smax, tmax, smax3, impacts, impactt, stained;
 411         qbyte *bl;
 412         vec3_t impact;
 413
 414         maxdist = radius * radius;
 415         invradius = 1.0f / radius;
 416
 417 loc0:
 418         if (node->contents < 0)
 419                 return;
 420         ndist = PlaneDiff(origin, node->plane);
 421         if (ndist > radius)
 422         {
 423                 node = node->children[0];
 424                 goto loc0;
 425         }
 426         if (ndist < -radius)
 427         {
 428                 node = node->children[1];
 429                 goto loc0;
 430         }
 431
 432         dist2 = ndist * ndist;
 433         maxdist3 = maxdist - dist2;
 434
 435         if (node->plane->type < 3)
 436         {
 437                 VectorCopy(origin, impact);
 438                 impact[node->plane->type] -= ndist;
 439         }
 440         else
 441         {
 442                 impact[0] = origin[0] - node->plane->normal[0] * ndist;
 443                 impact[1] = origin[1] - node->plane->normal[1] * ndist;
 444                 impact[2] = origin[2] - node->plane->normal[2] * ndist;
 445         }
 446
 447         for (surf = model->surfaces + node->firstsurface, endsurf = surf + node->numsurfaces;surf < endsurf;surf++)
 448         {
 449                 if (surf->stainsamples)
 450                 {
 451                         smax = (surf->extents[0] >> 4) + 1;
 452                         tmax = (surf->extents[1] >> 4) + 1;
 453
 454                         impacts = DotProduct (impact, surf->texinfo->vecs[0]) + surf->texinfo->vecs[0][3] - surf->texturemins[0];
 455                         impactt = DotProduct (impact, surf->texinfo->vecs[1]) + surf->texinfo->vecs[1][3] - surf->texturemins[1];
 456
 457                         s = bound(0, impacts, smax * 16) - impacts;
 458                         t = bound(0, impactt, tmax * 16) - impactt;
 459                         i = s * s + t * t + dist2;
 460                         if (i > maxdist)
 461                                 continue;
 462
 463                         // reduce calculations
 464                         for (s = 0, i = impacts; s < smax; s++, i -= 16)
 465                                 sdtable[s] = i * i + dist2;
 466
 467                         bl = surf->stainsamples;
 468                         smax3 = smax * 3;
 469                         stained = false;
 470
 471                         i = impactt;
 472                         for (t = 0;t < tmax;t++, i -= 16)
 473                         {
 474                                 td = i * i;
 475                                 // make sure some part of it is visible on this line
 476                                 if (td < maxdist3)
 477                                 {
 478                                         maxdist2 = maxdist - td;
 479                                         for (s = 0;s < smax;s++)
 480                                         {
 481                                                 if (sdtable[s] < maxdist2)
 482                                                 {
 483                                                         ratio = lhrandom(0.0f, 1.0f);
 484                                                         a = (fcolor[3] + ratio * fcolor[7]) * (1.0f - sqrt(sdtable[s] + td) * invradius);
 485                                                         if (a >= (1.0f / 64.0f))
 486                                                         {
 487                                                                 if (a > 1)
 488                                                                         a = 1;
 489                                                                 bl[0] = (qbyte) ((float) bl[0] + a * ((fcolor[0] + ratio * fcolor[4]) - (float) bl[0]));
 490                                                                 bl[1] = (qbyte) ((float) bl[1] + a * ((fcolor[1] + ratio * fcolor[5]) - (float) bl[1]));
 491                                                                 bl[2] = (qbyte) ((float) bl[2] + a * ((fcolor[2] + ratio * fcolor[6]) - (float) bl[2]));
 492                                                                 stained = true;
 493                                                         }
 494                                                 }
 495                                                 bl += 3;
 496                                         }
 497                                 }
 498                                 else // skip line
 499                                         bl += smax3;
 500                         }
 501                         // force lightmap upload
 502                         if (stained)
 503                                 surf->cached_dlight = true;
 504                 }
 505         }
 506
 507         if (node->children[0]->contents >= 0)
 508         {
 509                 if (node->children[1]->contents >= 0)
 510                 {
 511                         R_StainNode(node->children[0], model, origin, radius, fcolor);
 512                         node = node->children[1];
 513                         goto loc0;
 514                 }
 515                 else
 516                 {
 517                         node = node->children[0];
 518                         goto loc0;
 519                 }
 520         }
 521         else if (node->children[1]->contents >= 0)
 522         {
 523                 node = node->children[1];
 524                 goto loc0;
 525         }
 526 }
 527
 528 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)
 529 {
 530         int n;
 531         float fcolor[8];
 532         entity_render_t *ent;
 533         model_t *model;
 534         vec3_t org;
 535         if (cl.worldmodel == NULL)
 536                 return;
 537         fcolor[0] = cr1;
 538         fcolor[1] = cg1;
 539         fcolor[2] = cb1;
 540         fcolor[3] = ca1 * (1.0f / 64.0f);
 541         fcolor[4] = cr2 - cr1;
 542         fcolor[5] = cg2 - cg1;
 543         fcolor[6] = cb2 - cb1;
 544         fcolor[7] = (ca2 - ca1) * (1.0f / 64.0f);
 545
 546         R_StainNode(cl.worldmodel->nodes + cl.worldmodel->hulls[0].firstclipnode, cl.worldmodel, origin, radius, fcolor);
 547
 548         // look for embedded bmodels
 549         for (n = 0;n < cl_num_brushmodel_entities;n++)
 550         {
 551                 ent = cl_brushmodel_entities[n];
 552                 model = ent->model;
 553                 if (model && model->name[0] == '*')
 554                 {
 555                         Mod_CheckLoaded(model);
 556                         if (model->type == mod_brush)
 557                         {
 558                                 Matrix4x4_Transform(&ent->inversematrix, origin, org);
 559                                 R_StainNode(model->nodes + model->hulls[0].firstclipnode, model, org, radius, fcolor);
 560                         }
 561                 }
 562         }
 563 }
 564
 565
 566 /*
 567 =============================================================
 568
 569         BRUSH MODELS
 570
 571 =============================================================
 572 */
 573
 574 static void RSurf_AddLightmapToVertexColors(const int *lightmapoffsets, float *c, int numverts, const qbyte *samples, int size3, const qbyte *styles)
 575 {
 576         int i;
 577         float scale;
 578         const qbyte *lm;
 579         if (styles[0] != 255)
 580         {
 581                 for (i = 0;i < numverts;i++, c += 4)
 582                 {
 583                         lm = samples + lightmapoffsets[i];
 584                         scale = d_lightstylevalue[styles[0]] * (1.0f / 32768.0f);
 585                         VectorMA(c, scale, lm, c);
 586                         if (styles[1] != 255)
 587                         {
 588                                 lm += size3;
 589                                 scale = d_lightstylevalue[styles[1]] * (1.0f / 32768.0f);
 590                                 VectorMA(c, scale, lm, c);
 591                                 if (styles[2] != 255)
 592                                 {
 593                                         lm += size3;
 594                                         scale = d_lightstylevalue[styles[2]] * (1.0f / 32768.0f);
 595                                         VectorMA(c, scale, lm, c);
 596                                         if (styles[3] != 255)
 597                                         {
 598                                                 lm += size3;
 599                                                 scale = d_lightstylevalue[styles[3]] * (1.0f / 32768.0f);
 600                                                 VectorMA(c, scale, lm, c);
 601                                         }
 602                                 }
 603                         }
 604                 }
 605         }
 606 }
 607
 608 static void RSurf_FogColors(const float *v, float *c, float colorscale, int numverts, const float *modelorg)
 609 {
 610         int i;
 611         float diff[3], f;
 612         if (fogenabled)
 613         {
 614                 for (i = 0;i < numverts;i++, v += 4, c += 4)
 615                 {
 616                         VectorSubtract(v, modelorg, diff);
 617                         f = colorscale * (1 - exp(fogdensity/DotProduct(diff, diff)));
 618                         VectorScale(c, f, c);
 619                 }
 620         }
 621         else if (colorscale != 1)
 622                 for (i = 0;i < numverts;i++, c += 4)
 623                         VectorScale(c, colorscale, c);
 624 }
 625
 626 static void RSurf_FoggedColors(const float *v, float *c, float r, float g, float b, float a, float colorscale, int numverts, const float *modelorg)
 627 {
 628         int i;
 629         float diff[3], f;
 630         r *= colorscale;
 631         g *= colorscale;
 632         b *= colorscale;
 633         if (fogenabled)
 634         {
 635                 for (i = 0;i < numverts;i++, v += 4, c += 4)
 636                 {
 637                         VectorSubtract(v, modelorg, diff);
 638                         f = 1 - exp(fogdensity/DotProduct(diff, diff));
 639                         c[0] = r * f;
 640                         c[1] = g * f;
 641                         c[2] = b * f;
 642                         c[3] = a;
 643                 }
 644         }
 645         else
 646         {
 647                 for (i = 0;i < numverts;i++, c += 4)
 648                 {
 649                         c[0] = r;
 650                         c[1] = g;
 651                         c[2] = b;
 652                         c[3] = a;
 653                 }
 654         }
 655 }
 656
 657 static void RSurf_FogPassColors(const float *v, float *c, float r, float g, float b, float a, float colorscale, int numverts, const float *modelorg)
 658 {
 659         int i;
 660         float diff[3], f;
 661         r *= colorscale;
 662         g *= colorscale;
 663         b *= colorscale;
 664         for (i = 0;i < numverts;i++, v += 4, c += 4)
 665         {
 666                 VectorSubtract(v, modelorg, diff);
 667                 f = exp(fogdensity/DotProduct(diff, diff));
 668                 c[0] = r;
 669                 c[1] = g;
 670                 c[2] = b;
 671                 c[3] = a * f;
 672         }
 673 }
 674
 675 static void RSurf_ScaleColors(float *c, float scale, int numverts)
 676 {
 677         int i;
 678         if (scale != 1)
 679                 for (i = 0;i < numverts;i++, c += 4)
 680                         VectorScale(c, scale, c);
 681 }
 682
 683 static int RSurf_LightSeparate(const matrix4x4_t *matrix, const int *dlightbits, int numverts, const float *vert, float *color)
 684 {
 685         float f;
 686         const float *v;
 687         float *c;
 688         int i, l, lit = false;
 689         const rdlight_t *rd;
 690         vec3_t lightorigin;
 691         for (l = 0;l < r_numdlights;l++)
 692         {
 693                 if (dlightbits[l >> 5] & (1 << (l & 31)))
 694                 {
 695                         rd = &r_dlight[l];
 696                         Matrix4x4_Transform(matrix, rd->origin, lightorigin);
 697                         for (i = 0, v = vert, c = color;i < numverts;i++, v += 4, c += 4)
 698                         {
 699                                 f = VectorDistance2(v, lightorigin) + LIGHTOFFSET;
 700                                 if (f < rd->cullradius2)
 701                                 {
 702                                         f = (1.0f / f) - rd->subtract;
 703                                         VectorMA(c, f, rd->light, c);
 704                                         lit = true;
 705                                 }
 706                         }
 707                 }
 708         }
 709         return lit;
 710 }
 711
 712 // note: this untransforms lights to do the checking,
 713 // and takes surf->mesh->verts data
 714 static int RSurf_LightCheck(const matrix4x4_t *matrix, const int *dlightbits, const surfmesh_t *mesh)
 715 {
 716         int i, l;
 717         const rdlight_t *rd;
 718         vec3_t lightorigin;
 719         const float *v;
 720         for (l = 0;l < r_numdlights;l++)
 721         {
 722                 if (dlightbits[l >> 5] & (1 << (l & 31)))
 723                 {
 724                         rd = &r_dlight[l];
 725                         Matrix4x4_Transform(matrix, rd->origin, lightorigin);
 726                         for (i = 0, v = mesh->verts;i < mesh->numverts;i++, v += 4)
 727                                 if (VectorDistance2(v, lightorigin) < rd->cullradius2)
 728                                         return true;
 729                 }
 730         }
 731         return false;
 732 }
 733
 734 static void RSurfShader_Sky(const entity_render_t *ent, const texture_t *texture, msurface_t **surfchain)
 735 {
 736         const msurface_t *surf;
 737         const surfmesh_t *mesh;
 738         rmeshstate_t m;
 739
 740         // LordHavoc: HalfLife maps have freaky skypolys...
 741         if (ent->model->ishlbsp)
 742                 return;
 743
 744         if (skyrendernow)
 745         {
 746                 skyrendernow = false;
 747                 if (skyrendermasked)
 748                         R_Sky();
 749         }
 750
 751         R_Mesh_Matrix(&ent->matrix);
 752
 753         // draw depth-only polys
 754         memset(&m, 0, sizeof(m));
 755         if (skyrendermasked)
 756         {
 757                 qglColorMask(0,0,0,0);
 758                 // just to make sure that braindead drivers don't draw anything
 759                 // despite that colormask...
 760                 m.blendfunc1 = GL_ZERO;
 761                 m.blendfunc2 = GL_ONE;
 762         }
 763         else
 764         {
 765                 // fog sky
 766                 m.blendfunc1 = GL_ONE;
 767                 m.blendfunc2 = GL_ZERO;
 768         }
 769         m.depthwrite = true;
 770         R_Mesh_State(&m);
 771         while((surf = *surfchain++) != NULL)
 772         {
 773                 if (surf->visframe == r_framecount)
 774                 {
 775                         for (mesh = surf->mesh;mesh;mesh = mesh->chain)
 776                         {
 777                                 GL_Color(fogcolor[0] * r_colorscale, fogcolor[1] * r_colorscale, fogcolor[2] * r_colorscale, 1);
 778                                 R_Mesh_GetSpace(mesh->numverts);
 779                                 memcpy(varray_vertex, mesh->verts, mesh->numverts * sizeof(float[4]));
 780                                 R_Mesh_Draw(mesh->numverts, mesh->numtriangles, mesh->index);
 781                         }
 782                 }
 783         }
 784         qglColorMask(1,1,1,1);
 785 }
 786
 787 static void RSurfShader_Water_Callback(const void *calldata1, int calldata2)
 788 {
 789         int i;
 790         const entity_render_t *ent = calldata1;
 791         const msurface_t *surf = ent->model->surfaces + calldata2;
 792         float f, colorscale, scroll[2], *v;
 793         const surfmesh_t *mesh;
 794         rmeshstate_t m;
 795         float alpha;
 796         float modelorg[3];
 797         texture_t *texture;
 798         Matrix4x4_Transform(&ent->inversematrix, r_origin, modelorg);
 799
 800         R_Mesh_Matrix(&ent->matrix);
 801
 802         memset(&m, 0, sizeof(m));
 803         texture = surf->texinfo->texture->currentframe;
 804         alpha = texture->currentalpha;
 805         if (texture->rendertype == SURFRENDER_ADD)
 806         {
 807                 m.blendfunc1 = GL_SRC_ALPHA;
 808                 m.blendfunc2 = GL_ONE;
 809         }
 810         else if (texture->rendertype == SURFRENDER_ALPHA)
 811         {
 812                 m.blendfunc1 = GL_SRC_ALPHA;
 813                 m.blendfunc2 = GL_ONE_MINUS_SRC_ALPHA;
 814         }
 815         else
 816         {
 817                 m.blendfunc1 = GL_ONE;
 818                 m.blendfunc2 = GL_ZERO;
 819         }
 820         m.tex[0] = R_GetTexture(texture->skin.base);
 821         colorscale = r_colorscale;
 822         if (gl_combine.integer)
 823         {
 824                 m.texrgbscale[0] = 4;
 825                 colorscale *= 0.25f;
 826         }
 827         R_Mesh_State(&m);
 828         GL_UseColorArray();
 829         for (mesh = surf->mesh;mesh;mesh = mesh->chain)
 830         {
 831                 R_Mesh_GetSpace(mesh->numverts);
 832                 memcpy(varray_vertex, mesh->verts, mesh->numverts * sizeof(float[4]));
 833                 memcpy(varray_texcoord[0], mesh->str, mesh->numverts * sizeof(float[4]));
 834                 scroll[0] = sin(cl.time) * 0.125f;
 835                 scroll[1] = sin(cl.time * 0.8f) * 0.125f;
 836                 for (i = 0, v = varray_texcoord[0];i < mesh->numverts;i++, v += 4)
 837                 {
 838                         v[0] += scroll[0];
 839                         v[1] += scroll[1];
 840                 }
 841                 f = surf->flags & SURF_DRAWFULLBRIGHT ? 1.0f : ((surf->flags & SURF_LIGHTMAP) ? 0 : 0.5f);
 842                 R_FillColors(varray_color, mesh->numverts, f, f, f, alpha);
 843                 if (!(surf->flags & SURF_DRAWFULLBRIGHT || ent->effects & EF_FULLBRIGHT))
 844                 {
 845                         if (surf->dlightframe == r_framecount)
 846                                 RSurf_LightSeparate(&ent->inversematrix, surf->dlightbits, mesh->numverts, varray_vertex, varray_color);
 847                         if (surf->flags & SURF_LIGHTMAP)
 848                                 RSurf_AddLightmapToVertexColors(mesh->lightmapoffsets, varray_color, mesh->numverts, surf->samples, ((surf->extents[0]>>4)+1)*((surf->extents[1]>>4)+1)*3, surf->styles);
 849                 }
 850                 RSurf_FogColors(varray_vertex, varray_color, colorscale, mesh->numverts, modelorg);
 851                 R_Mesh_Draw(mesh->numverts, mesh->numtriangles, mesh->index);
 852         }
 853
 854         if (fogenabled)
 855         {
 856                 memset(&m, 0, sizeof(m));
 857                 m.blendfunc1 = GL_SRC_ALPHA;
 858                 m.blendfunc2 = GL_ONE;
 859                 m.tex[0] = R_GetTexture(texture->skin.fog);
 860                 R_Mesh_State(&m);
 861                 for (mesh = surf->mesh;mesh;mesh = mesh->chain)
 862                 {
 863                         R_Mesh_GetSpace(mesh->numverts);
 864                         memcpy(varray_vertex, mesh->verts, mesh->numverts * sizeof(float[4]));
 865                         if (m.tex[0])
 866                                 memcpy(varray_texcoord[0], mesh->str, mesh->numverts * sizeof(float[4]));
 867                         RSurf_FogPassColors(varray_vertex, varray_color, fogcolor[0], fogcolor[1], fogcolor[2], alpha, r_colorscale, mesh->numverts, modelorg);
 868                         R_Mesh_Draw(mesh->numverts, mesh->numtriangles, mesh->index);
 869                 }
 870         }
 871 }
 872
 873 static void RSurfShader_Water(const entity_render_t *ent, const texture_t *texture, msurface_t **surfchain)
 874 {
 875         const msurface_t *surf;
 876         msurface_t **chain;
 877         vec3_t center;
 878         if (texture->rendertype != SURFRENDER_OPAQUE)
 879         {
 880                 for (chain = surfchain;(surf = *chain) != NULL;chain++)
 881                 {
 882                         if (surf->visframe == r_framecount)
 883                         {
 884                                 Matrix4x4_Transform(&ent->matrix, surf->poly_center, center);
 885                                 R_MeshQueue_AddTransparent(center, RSurfShader_Water_Callback, ent, surf - ent->model->surfaces);
 886                         }
 887                 }
 888         }
 889         else
 890                 for (chain = surfchain;(surf = *chain) != NULL;chain++)
 891                         if (surf->visframe == r_framecount)
 892                                 RSurfShader_Water_Callback(ent, surf - ent->model->surfaces);
 893 }
 894
 895 static void RSurfShader_Wall_Pass_BaseVertex(const entity_render_t *ent, const msurface_t *surf, const texture_t *texture, int rendertype, float currentalpha)
 896 {
 897         float base, colorscale;
 898         const surfmesh_t *mesh;
 899         rmeshstate_t m;
 900         float modelorg[3];
 901         Matrix4x4_Transform(&ent->inversematrix, r_origin, modelorg);
 902         memset(&m, 0, sizeof(m));
 903         if (rendertype == SURFRENDER_ADD)
 904         {
 905                 m.blendfunc1 = GL_SRC_ALPHA;
 906                 m.blendfunc2 = GL_ONE;
 907         }
 908         else if (rendertype == SURFRENDER_ALPHA)
 909         {
 910                 m.blendfunc1 = GL_SRC_ALPHA;
 911                 m.blendfunc2 = GL_ONE_MINUS_SRC_ALPHA;
 912         }
 913         else
 914         {
 915                 m.blendfunc1 = GL_ONE;
 916                 m.blendfunc2 = GL_ZERO;
 917         }
 918         m.tex[0] = R_GetTexture(texture->skin.base);
 919         colorscale = r_colorscale;
 920         if (gl_combine.integer)
 921         {
 922                 m.texrgbscale[0] = 4;
 923                 colorscale *= 0.25f;
 924         }
 925         base = ent->effects & EF_FULLBRIGHT ? 2.0f : r_ambient.value * (1.0f / 64.0f);
 926         R_Mesh_State(&m);
 927         GL_UseColorArray();
 928         for (mesh = surf->mesh;mesh;mesh = mesh->chain)
 929         {
 930                 R_Mesh_GetSpace(mesh->numverts);
 931                 memcpy(varray_vertex, mesh->verts, mesh->numverts * sizeof(float[4]));
 932                 memcpy(varray_texcoord[0], mesh->str, mesh->numverts * sizeof(float[4]));
 933                 R_FillColors(varray_color, mesh->numverts, base, base, base, currentalpha);
 934                 if (!(ent->effects & EF_FULLBRIGHT))
 935                 {
 936                         if (surf->dlightframe == r_framecount)
 937                                 RSurf_LightSeparate(&ent->inversematrix, surf->dlightbits, mesh->numverts, varray_vertex, varray_color);
 938                         if (surf->flags & SURF_LIGHTMAP)
 939                                 RSurf_AddLightmapToVertexColors(mesh->lightmapoffsets, varray_color, mesh->numverts, surf->samples, ((surf->extents[0]>>4)+1)*((surf->extents[1]>>4)+1)*3, surf->styles);
 940                 }
 941                 RSurf_FogColors(varray_vertex, varray_color, colorscale, mesh->numverts, modelorg);
 942                 R_Mesh_Draw(mesh->numverts, mesh->numtriangles, mesh->index);
 943         }
 944 }
 945
 946 static void RSurfShader_Wall_Pass_Glow(const entity_render_t *ent, const msurface_t *surf, const texture_t *texture, int rendertype, float currentalpha)
 947 {
 948         const surfmesh_t *mesh;
 949         rmeshstate_t m;
 950         float modelorg[3];
 951         Matrix4x4_Transform(&ent->inversematrix, r_origin, modelorg);
 952         memset(&m, 0, sizeof(m));
 953         m.blendfunc1 = GL_SRC_ALPHA;
 954         m.blendfunc2 = GL_ONE;
 955         m.tex[0] = R_GetTexture(texture->skin.glow);
 956         R_Mesh_State(&m);
 957         GL_UseColorArray();
 958         for (mesh = surf->mesh;mesh;mesh = mesh->chain)
 959         {
 960                 R_Mesh_GetSpace(mesh->numverts);
 961                 memcpy(varray_vertex, mesh->verts, mesh->numverts * sizeof(float[4]));
 962                 memcpy(varray_texcoord[0], mesh->str, mesh->numverts * sizeof(float[4]));
 963                 RSurf_FoggedColors(varray_vertex, varray_color, 1, 1, 1, currentalpha, r_colorscale, mesh->numverts, modelorg);
 964                 R_Mesh_Draw(mesh->numverts, mesh->numtriangles, mesh->index);
 965         }
 966 }
 967
 968 static void RSurfShader_Wall_Pass_Fog(const entity_render_t *ent, const msurface_t *surf, const texture_t *texture, int rendertype, float currentalpha)
 969 {
 970         const surfmesh_t *mesh;
 971         rmeshstate_t m;
 972         float modelorg[3];
 973         Matrix4x4_Transform(&ent->inversematrix, r_origin, modelorg);
 974         memset(&m, 0, sizeof(m));
 975         m.blendfunc1 = GL_SRC_ALPHA;
 976         m.blendfunc2 = GL_ONE;
 977         m.tex[0] = R_GetTexture(texture->skin.fog);
 978         R_Mesh_State(&m);
 979         GL_UseColorArray();
 980         for (mesh = surf->mesh;mesh;mesh = mesh->chain)
 981         {
 982                 R_Mesh_GetSpace(mesh->numverts);
 983                 memcpy(varray_vertex, mesh->verts, mesh->numverts * sizeof(float[4]));
 984                 if (m.tex[0])
 985                         memcpy(varray_texcoord[0], mesh->str, mesh->numverts * sizeof(float[4]));
 986                 RSurf_FogPassColors(varray_vertex, varray_color, fogcolor[0], fogcolor[1], fogcolor[2], currentalpha, r_colorscale, mesh->numverts, modelorg);
 987                 R_Mesh_Draw(mesh->numverts, mesh->numtriangles, mesh->index);
 988         }
 989 }
 990
 991 static void RSurfShader_OpaqueWall_Pass_BaseTripleTexCombine(const entity_render_t *ent, const texture_t *texture, msurface_t **surfchain)
 992 {
 993         const msurface_t *surf;
 994         const surfmesh_t *mesh;
 995         rmeshstate_t m;
 996         int lightmaptexturenum;
 997         float cl;
 998         memset(&m, 0, sizeof(m));
 999         m.blendfunc1 = GL_ONE;
1000         m.blendfunc2 = GL_ZERO;
1001         m.tex[0] = R_GetTexture(texture->skin.base);
1002         m.tex[1] = R_GetTexture((**surfchain).lightmaptexture);
1003         m.tex[2] = R_GetTexture(texture->skin.detail);
1004         m.texrgbscale[0] = 1;
1005         m.texrgbscale[1] = 4;
1006         m.texrgbscale[2] = 2;
1007         R_Mesh_State(&m);
1008         cl = (float) (1 << r_lightmapscalebit) * r_colorscale;
1009         GL_Color(cl, cl, cl, 1);
1010         while((surf = *surfchain++) != NULL)
1011         {
1012                 if (surf->visframe == r_framecount)
1013                 {
1014                         lightmaptexturenum = R_GetTexture(surf->lightmaptexture);
1015                         if (m.tex[1] != lightmaptexturenum)
1016                         {
1017                                 m.tex[1] = lightmaptexturenum;
1018                                 R_Mesh_State(&m);
1019                         }
1020                         for (mesh = surf->mesh;mesh;mesh = mesh->chain)
1021                         {
1022                                 R_Mesh_GetSpace(mesh->numverts);
1023                                 memcpy(varray_vertex, mesh->verts, mesh->numverts * sizeof(float[4]));
1024                                 memcpy(varray_texcoord[0], mesh->str, mesh->numverts * sizeof(float[4]));
1025                                 memcpy(varray_texcoord[1], mesh->uvw, mesh->numverts * sizeof(float[4]));
1026                                 memcpy(varray_texcoord[2], mesh->abc, mesh->numverts * sizeof(float[4]));
1027                                 R_Mesh_Draw(mesh->numverts, mesh->numtriangles, mesh->index);
1028                         }
1029                 }
1030         }
1031 }
1032
1033 static void RSurfShader_OpaqueWall_Pass_BaseDoubleTex(const entity_render_t *ent, const texture_t *texture, msurface_t **surfchain)
1034 {
1035         const msurface_t *surf;
1036         const surfmesh_t *mesh;
1037         rmeshstate_t m;
1038         int lightmaptexturenum;
1039         memset(&m, 0, sizeof(m));
1040         m.blendfunc1 = GL_ONE;
1041         m.blendfunc2 = GL_ZERO;
1042         m.tex[0] = R_GetTexture(texture->skin.base);
1043         m.tex[1] = R_GetTexture((**surfchain).lightmaptexture);
1044         if (gl_combine.integer)
1045                 m.texrgbscale[1] = 4;
1046         R_Mesh_State(&m);
1047         GL_Color(r_colorscale, r_colorscale, r_colorscale, 1);
1048         while((surf = *surfchain++) != NULL)
1049         {
1050                 if (surf->visframe == r_framecount)
1051                 {
1052                         lightmaptexturenum = R_GetTexture(surf->lightmaptexture);
1053                         if (m.tex[1] != lightmaptexturenum)
1054                         {
1055                                 m.tex[1] = lightmaptexturenum;
1056                                 R_Mesh_State(&m);
1057                         }
1058                         for (mesh = surf->mesh;mesh;mesh = mesh->chain)
1059                         {
1060                                 R_Mesh_GetSpace(mesh->numverts);
1061                                 memcpy(varray_vertex, mesh->verts, mesh->numverts * sizeof(float[4]));
1062                                 memcpy(varray_texcoord[0], mesh->str, mesh->numverts * sizeof(float[4]));
1063                                 memcpy(varray_texcoord[1], mesh->uvw, mesh->numverts * sizeof(float[4]));
1064                                 R_Mesh_Draw(mesh->numverts, mesh->numtriangles, mesh->index);
1065                         }
1066                 }
1067         }
1068 }
1069
1070 static void RSurfShader_OpaqueWall_Pass_BaseTexture(const entity_render_t *ent, const texture_t *texture, msurface_t **surfchain)
1071 {
1072         const msurface_t *surf;
1073         const surfmesh_t *mesh;
1074         rmeshstate_t m;
1075         memset(&m, 0, sizeof(m));
1076         m.blendfunc1 = GL_ONE;
1077         m.blendfunc2 = GL_ZERO;
1078         m.tex[0] = R_GetTexture(texture->skin.base);
1079         R_Mesh_State(&m);
1080         GL_Color(1, 1, 1, 1);
1081         while((surf = *surfchain++) != NULL)
1082         {
1083                 if (surf->visframe == r_framecount)
1084                 {
1085                         for (mesh = surf->mesh;mesh;mesh = mesh->chain)
1086                         {
1087                                 R_Mesh_GetSpace(mesh->numverts);
1088                                 memcpy(varray_vertex, mesh->verts, mesh->numverts * sizeof(float[4]));
1089                                 memcpy(varray_texcoord[0], mesh->str, mesh->numverts * sizeof(float[4]));
1090                                 R_Mesh_Draw(mesh->numverts, mesh->numtriangles, mesh->index);
1091                         }
1092                 }
1093         }
1094 }
1095
1096 static void RSurfShader_OpaqueWall_Pass_BaseLightmap(const entity_render_t *ent, const texture_t *texture, msurface_t **surfchain)
1097 {
1098         const msurface_t *surf;
1099         const surfmesh_t *mesh;
1100         rmeshstate_t m;
1101         int lightmaptexturenum;
1102         memset(&m, 0, sizeof(m));
1103         m.blendfunc1 = GL_ZERO;
1104         m.blendfunc2 = GL_SRC_COLOR;
1105         m.tex[0] = R_GetTexture((**surfchain).lightmaptexture);
1106         if (gl_combine.integer)
1107                 m.texrgbscale[0] = 4;
1108         R_Mesh_State(&m);
1109         GL_Color(r_colorscale, r_colorscale, r_colorscale, 1);
1110         while((surf = *surfchain++) != NULL)
1111         {
1112                 if (surf->visframe == r_framecount)
1113                 {
1114                         lightmaptexturenum = R_GetTexture(surf->lightmaptexture);
1115                         if (m.tex[0] != lightmaptexturenum)
1116                         {
1117                                 m.tex[0] = lightmaptexturenum;
1118                                 R_Mesh_State(&m);
1119                         }
1120                         for (mesh = surf->mesh;mesh;mesh = mesh->chain)
1121                         {
1122                                 R_Mesh_GetSpace(mesh->numverts);
1123                                 memcpy(varray_vertex, mesh->verts, mesh->numverts * sizeof(float[4]));
1124                                 memcpy(varray_texcoord[0], mesh->uvw, mesh->numverts * sizeof(float[4]));
1125                                 R_Mesh_Draw(mesh->numverts, mesh->numtriangles, mesh->index);
1126                         }
1127                 }
1128         }
1129 }
1130
1131 static void RSurfShader_OpaqueWall_Pass_Light(const entity_render_t *ent, const texture_t *texture, msurface_t **surfchain)
1132 {
1133         const msurface_t *surf;
1134         const surfmesh_t *mesh;
1135         float colorscale;
1136         rmeshstate_t m;
1137
1138         memset(&m, 0, sizeof(m));
1139         m.blendfunc1 = GL_SRC_ALPHA;
1140         m.blendfunc2 = GL_ONE;
1141         m.tex[0] = R_GetTexture(texture->skin.base);
1142         colorscale = r_colorscale;
1143         if (gl_combine.integer)
1144         {
1145                 m.texrgbscale[0] = 4;
1146                 colorscale *= 0.25f;
1147         }
1148         R_Mesh_State(&m);
1149         GL_UseColorArray();
1150         while((surf = *surfchain++) != NULL)
1151         {
1152                 if (surf->visframe == r_framecount && surf->dlightframe == r_framecount)
1153                 {
1154                         for (mesh = surf->mesh;mesh;mesh = mesh->chain)
1155                         {
1156                                 if (RSurf_LightCheck(&ent->inversematrix, surf->dlightbits, mesh))
1157                                 {
1158                                         R_Mesh_GetSpace(mesh->numverts);
1159                                         memcpy(varray_vertex, mesh->verts, mesh->numverts * sizeof(float[4]));
1160                                         memcpy(varray_texcoord[0], mesh->str, mesh->numverts * sizeof(float[4]));
1161                                         R_FillColors(varray_color, mesh->numverts, 0, 0, 0, 1);
1162                                         RSurf_LightSeparate(&ent->inversematrix, surf->dlightbits, mesh->numverts, varray_vertex, varray_color);
1163                                         RSurf_ScaleColors(varray_color, colorscale, mesh->numverts);
1164                                         R_Mesh_Draw(mesh->numverts, mesh->numtriangles, mesh->index);
1165                                 }
1166                         }
1167                 }
1168         }
1169 }
1170
1171 static void RSurfShader_OpaqueWall_Pass_Fog(const entity_render_t *ent, const texture_t *texture, msurface_t **surfchain)
1172 {
1173         const msurface_t *surf;
1174         const surfmesh_t *mesh;
1175         rmeshstate_t m;
1176         float modelorg[3];
1177         Matrix4x4_Transform(&ent->inversematrix, r_origin, modelorg);
1178         memset(&m, 0, sizeof(m));
1179         m.blendfunc1 = GL_SRC_ALPHA;
1180         m.blendfunc2 = GL_ONE_MINUS_SRC_ALPHA;
1181         R_Mesh_State(&m);
1182         GL_UseColorArray();
1183         while((surf = *surfchain++) != NULL)
1184         {
1185                 if (surf->visframe == r_framecount)
1186                 {
1187                         for (mesh = surf->mesh;mesh;mesh = mesh->chain)
1188                         {
1189                                 R_Mesh_GetSpace(mesh->numverts);
1190                                 memcpy(varray_vertex, mesh->verts, mesh->numverts * sizeof(float[4]));
1191                                 if (m.tex[0])
1192                                         memcpy(varray_texcoord[0], mesh->str, mesh->numverts * sizeof(float[4]));
1193                                 RSurf_FogPassColors(varray_vertex, varray_color, fogcolor[0], fogcolor[1], fogcolor[2], 1, r_colorscale, mesh->numverts, modelorg);
1194                                 R_Mesh_Draw(mesh->numverts, mesh->numtriangles, mesh->index);
1195                         }
1196                 }
1197         }
1198 }
1199
1200 static void RSurfShader_OpaqueWall_Pass_BaseDetail(const entity_render_t *ent, const texture_t *texture, msurface_t **surfchain)
1201 {
1202         const msurface_t *surf;
1203         const surfmesh_t *mesh;
1204         rmeshstate_t m;
1205         memset(&m, 0, sizeof(m));
1206         m.blendfunc1 = GL_DST_COLOR;
1207         m.blendfunc2 = GL_SRC_COLOR;
1208         m.tex[0] = R_GetTexture(texture->skin.detail);
1209         R_Mesh_State(&m);
1210         GL_Color(1, 1, 1, 1);
1211         while((surf = *surfchain++) != NULL)
1212         {
1213                 if (surf->visframe == r_framecount)
1214                 {
1215                         for (mesh = surf->mesh;mesh;mesh = mesh->chain)
1216                         {
1217                                 R_Mesh_GetSpace(mesh->numverts);
1218                                 memcpy(varray_vertex, mesh->verts, mesh->numverts * sizeof(float[4]));
1219                                 memcpy(varray_texcoord[0], mesh->abc, mesh->numverts * sizeof(float[4]));
1220                                 R_Mesh_Draw(mesh->numverts, mesh->numtriangles, mesh->index);
1221                         }
1222                 }
1223         }
1224 }
1225
1226 static void RSurfShader_OpaqueWall_Pass_Glow(const entity_render_t *ent, const texture_t *texture, msurface_t **surfchain)
1227 {
1228         const msurface_t *surf;
1229         const surfmesh_t *mesh;
1230         rmeshstate_t m;
1231         memset(&m, 0, sizeof(m));
1232         m.blendfunc1 = GL_SRC_ALPHA;
1233         m.blendfunc2 = GL_ONE;
1234         m.tex[0] = R_GetTexture(texture->skin.glow);
1235         R_Mesh_State(&m);
1236         GL_Color(r_colorscale, r_colorscale, r_colorscale, 1);
1237         while((surf = *surfchain++) != NULL)
1238         {
1239                 if (surf->visframe == r_framecount)
1240                 {
1241                         for (mesh = surf->mesh;mesh;mesh = mesh->chain)
1242                         {
1243                                 R_Mesh_GetSpace(mesh->numverts);
1244                                 memcpy(varray_vertex, mesh->verts, mesh->numverts * sizeof(float[4]));
1245                                 memcpy(varray_texcoord[0], mesh->str, mesh->numverts * sizeof(float[4]));
1246                                 R_Mesh_Draw(mesh->numverts, mesh->numtriangles, mesh->index);
1247                         }
1248                 }
1249         }
1250 }
1251
1252 static void RSurfShader_OpaqueWall_Pass_OpaqueGlow(const entity_render_t *ent, const texture_t *texture, msurface_t **surfchain)
1253 {
1254         const msurface_t *surf;
1255         const surfmesh_t *mesh;
1256         rmeshstate_t m;
1257         memset(&m, 0, sizeof(m));
1258         m.blendfunc1 = GL_SRC_ALPHA;
1259         m.blendfunc2 = GL_ZERO;
1260         m.tex[0] = R_GetTexture(texture->skin.glow);
1261         R_Mesh_State(&m);
1262         if (m.tex[0])
1263                 GL_Color(r_colorscale, r_colorscale, r_colorscale, 1);
1264         else
1265                 GL_Color(0, 0, 0, 1);
1266         while((surf = *surfchain++) != NULL)
1267         {
1268                 if (surf->visframe == r_framecount)
1269                 {
1270                         for (mesh = surf->mesh;mesh;mesh = mesh->chain)
1271                         {
1272                                 R_Mesh_GetSpace(mesh->numverts);
1273                                 memcpy(varray_vertex, mesh->verts, mesh->numverts * sizeof(float[4]));
1274                                 memcpy(varray_texcoord[0], mesh->str, mesh->numverts * sizeof(float[4]));
1275                                 R_Mesh_Draw(mesh->numverts, mesh->numtriangles, mesh->index);
1276                         }
1277                 }
1278         }
1279 }
1280
1281 static void RSurfShader_Wall_Vertex_Callback(const void *calldata1, int calldata2)
1282 {
1283         const entity_render_t *ent = calldata1;
1284         const msurface_t *surf = ent->model->surfaces + calldata2;
1285         int rendertype;
1286         float currentalpha;
1287         texture_t *texture;
1288         R_Mesh_Matrix(&ent->matrix);
1289
1290         texture = surf->texinfo->texture;
1291         if (texture->animated)
1292                 texture = texture->anim_frames[ent->frame != 0][(texture->anim_total[ent->frame != 0] >= 2) ? ((int) (cl.time * 5.0f) % texture->anim_total[ent->frame != 0]) : 0];
1293
1294         currentalpha = ent->alpha;
1295         if (texture->flags & SURF_WATERALPHA)
1296                 currentalpha *= r_wateralpha.value;
1297         if (ent->effects & EF_ADDITIVE)
1298                 rendertype = SURFRENDER_ADD;
1299         else if (currentalpha < 1 || texture->skin.fog != NULL)
1300                 rendertype = SURFRENDER_ALPHA;
1301         else
1302                 rendertype = SURFRENDER_OPAQUE;
1303
1304         RSurfShader_Wall_Pass_BaseVertex(ent, surf, texture, rendertype, currentalpha);
1305         if (texture->skin.glow)
1306                 RSurfShader_Wall_Pass_Glow(ent, surf, texture, rendertype, currentalpha);
1307         if (fogenabled)
1308                 RSurfShader_Wall_Pass_Fog(ent, surf, texture, rendertype, currentalpha);
1309 }
1310
1311 static void RSurfShader_Wall_Lightmap(const entity_render_t *ent, const texture_t *texture, msurface_t **surfchain)
1312 {
1313         const msurface_t *surf;
1314         msurface_t **chain;
1315         vec3_t center;
1316         if (texture->rendertype != SURFRENDER_OPAQUE)
1317         {
1318                 // transparent vertex shaded from lightmap
1319                 for (chain = surfchain;(surf = *chain) != NULL;chain++)
1320                 {
1321                         if (surf->visframe == r_framecount)
1322                         {
1323                                 Matrix4x4_Transform(&ent->matrix, surf->poly_center, center);
1324                                 R_MeshQueue_AddTransparent(center, RSurfShader_Wall_Vertex_Callback, ent, surf - ent->model->surfaces);
1325                         }
1326                 }
1327         }
1328         else if (r_shadow_lightingmode >= 2)
1329         {
1330                 // opaque base lighting
1331                 RSurfShader_OpaqueWall_Pass_OpaqueGlow(ent, texture, surfchain);
1332                 if (fogenabled)
1333                         RSurfShader_OpaqueWall_Pass_Fog(ent, texture, surfchain);
1334         }
1335         else if (r_vertexsurfaces.integer)
1336         {
1337                 // opaque vertex shaded from lightmap
1338                 for (chain = surfchain;(surf = *chain) != NULL;chain++)
1339                         if (surf->visframe == r_framecount)
1340                                 RSurfShader_Wall_Pass_BaseVertex(ent, surf, texture, texture->rendertype, texture->currentalpha);
1341                 if (texture->skin.glow)
1342                         for (chain = surfchain;(surf = *chain) != NULL;chain++)
1343                                 if (surf->visframe == r_framecount)
1344                                         RSurfShader_Wall_Pass_Glow(ent, surf, texture, texture->rendertype, texture->currentalpha);
1345                 if (fogenabled)
1346                         for (chain = surfchain;(surf = *chain) != NULL;chain++)
1347                                 if (surf->visframe == r_framecount)
1348                                         RSurfShader_Wall_Pass_Fog(ent, surf, texture, texture->rendertype, texture->currentalpha);
1349         }
1350         else
1351         {
1352                 // opaque lightmapped
1353                 if (r_textureunits.integer >= 2)
1354                 {
1355                         if (r_textureunits.integer >= 3 && gl_combine.integer && r_detailtextures.integer)
1356                                 RSurfShader_OpaqueWall_Pass_BaseTripleTexCombine(ent, texture, surfchain);
1357                         else
1358                         {
1359                                 RSurfShader_OpaqueWall_Pass_BaseDoubleTex(ent, texture, surfchain);
1360                                 if (r_detailtextures.integer)
1361                                         RSurfShader_OpaqueWall_Pass_BaseDetail(ent, texture, surfchain);
1362                         }
1363                 }
1364                 else
1365                 {
1366                         RSurfShader_OpaqueWall_Pass_BaseTexture(ent, texture, surfchain);
1367                         RSurfShader_OpaqueWall_Pass_BaseLightmap(ent, texture, surfchain);
1368                         if (r_detailtextures.integer)
1369                                 RSurfShader_OpaqueWall_Pass_BaseDetail(ent, texture, surfchain);
1370                 }
1371                 if (!r_dlightmap.integer && !(ent->effects & EF_FULLBRIGHT))
1372                         RSurfShader_OpaqueWall_Pass_Light(ent, texture, surfchain);
1373                 if (texture->skin.glow)
1374                         RSurfShader_OpaqueWall_Pass_Glow(ent, texture, surfchain);
1375                 if (fogenabled)
1376                         RSurfShader_OpaqueWall_Pass_Fog(ent, texture, surfchain);
1377         }
1378 }
1379
1380 Cshader_t Cshader_wall_lightmap = {{NULL, RSurfShader_Wall_Lightmap}, SHADERFLAGS_NEEDLIGHTMAP};
1381 Cshader_t Cshader_water = {{NULL, RSurfShader_Water}, 0};
1382 Cshader_t Cshader_sky = {{RSurfShader_Sky, NULL}, 0};
1383
1384 int Cshader_count = 3;
1385 Cshader_t *Cshaders[3] =
1386 {
1387         &Cshader_wall_lightmap,
1388         &Cshader_water,
1389         &Cshader_sky
1390 };
1391
1392 void R_UpdateTextureInfo(entity_render_t *ent)
1393 {
1394         int i, texframe, alttextures;
1395         texture_t *t;
1396
1397         if (!ent->model)
1398                 return;
1399
1400         alttextures = ent->frame != 0;
1401         texframe = (int)(cl.time * 5.0f);
1402         for (i = 0;i < ent->model->numtextures;i++)
1403         {
1404                 t = ent->model->textures + i;
1405                 t->currentalpha = ent->alpha;
1406                 if (t->flags & SURF_WATERALPHA)
1407                         t->currentalpha *= r_wateralpha.value;
1408                 if (ent->effects & EF_ADDITIVE)
1409                         t->rendertype = SURFRENDER_ADD;
1410                 else if (t->currentalpha < 1 || t->skin.fog != NULL)
1411                         t->rendertype = SURFRENDER_ALPHA;
1412                 else
1413                         t->rendertype = SURFRENDER_OPAQUE;
1414                 // we don't need to set currentframe if t->animated is false because
1415                 // it was already set up by the texture loader for non-animating
1416                 if (t->animated)
1417                         t->currentframe = t->anim_frames[alttextures][(t->anim_total[alttextures] >= 2) ? (texframe % t->anim_total[alttextures]) : 0];
1418         }
1419 }
1420
1421 void R_PrepareSurfaces(entity_render_t *ent)
1422 {
1423         int i, numsurfaces, *surfacevisframes;
1424         model_t *model;
1425         msurface_t *surf, *surfaces, **surfchain;
1426         vec3_t modelorg;
1427
1428         if (!ent->model)
1429                 return;
1430
1431         model = ent->model;
1432         Matrix4x4_Transform(&ent->inversematrix, r_origin, modelorg);
1433         numsurfaces = model->nummodelsurfaces;
1434         surfaces = model->surfaces + model->firstmodelsurface;
1435         surfacevisframes = model->surfacevisframes + model->firstmodelsurface;
1436
1437         R_UpdateTextureInfo(ent);
1438
1439         if (r_dynamic.integer && r_shadow_lightingmode < 1)
1440                 R_MarkLights(ent);
1441
1442         if (model->light_ambient != r_ambient.value || model->light_scalebit != r_lightmapscalebit)
1443         {
1444                 model->light_ambient = r_ambient.value;
1445                 model->light_scalebit = r_lightmapscalebit;
1446                 for (i = 0;i < model->nummodelsurfaces;i++)
1447                         model->surfaces[i + model->firstmodelsurface].cached_dlight = true;
1448         }
1449         else
1450         {
1451                 for (i = 0;i < model->light_styles;i++)
1452                 {
1453                         if (model->light_stylevalue[i] != d_lightstylevalue[model->light_style[i]])
1454                         {
1455                                 model->light_stylevalue[i] = d_lightstylevalue[model->light_style[i]];
1456                                 for (surfchain = model->light_styleupdatechains[i];*surfchain;surfchain++)
1457                                         (**surfchain).cached_dlight = true;
1458                         }
1459                 }
1460         }
1461
1462         for (i = 0, surf = surfaces;i < numsurfaces;i++, surf++)
1463         {
1464                 if (surfacevisframes[i] == r_framecount)
1465                 {
1466 #if !WORLDNODECULLBACKFACES
1467                         // mark any backface surfaces as not visible
1468                         if (PlaneDist(modelorg, surf->plane) < surf->plane->dist)
1469                         {
1470                                 if (!(surf->flags & SURF_PLANEBACK))
1471                                         surfacevisframes[i] = -1;
1472                         }
1473                         else
1474                         {
1475                                 if ((surf->flags & SURF_PLANEBACK))
1476                                         surfacevisframes[i] = -1;
1477                         }
1478                         if (surfacevisframes[i] == r_framecount)
1479 #endif
1480                         {
1481                                 c_faces++;
1482                                 surf->visframe = r_framecount;
1483                                 if (surf->cached_dlight && surf->lightmaptexture != NULL && !r_vertexsurfaces.integer)
1484                                         R_BuildLightMap(ent, surf);
1485                         }
1486                 }
1487         }
1488 }
1489
1490 void R_DrawSurfaces(entity_render_t *ent, int type, msurface_t ***chains)
1491 {
1492         int i;
1493         texture_t *t;
1494         if (ent->model == NULL)
1495                 return;
1496         R_Mesh_Matrix(&ent->matrix);
1497         for (i = 0, t = ent->model->textures;i < ent->model->numtextures;i++, t++)
1498                 if (t->shader->shaderfunc[type] && t->currentframe && chains[i] != NULL)
1499                         t->shader->shaderfunc[type](ent, t->currentframe, chains[i]);
1500 }
1501
1502 static void R_DrawPortal_Callback(const void *calldata1, int calldata2)
1503 {
1504         int i;
1505         float *v;
1506         rmeshstate_t m;
1507         const entity_render_t *ent = calldata1;
1508         const mportal_t *portal = ent->model->portals + calldata2;
1509         memset(&m, 0, sizeof(m));
1510         m.blendfunc1 = GL_SRC_ALPHA;
1511         m.blendfunc2 = GL_ONE_MINUS_SRC_ALPHA;
1512         R_Mesh_Matrix(&ent->matrix);
1513         R_Mesh_State(&m);
1514         R_Mesh_GetSpace(portal->numpoints);
1515         i = portal - ent->model->portals;
1516         GL_Color(((i & 0x0007) >> 0) * (1.0f / 7.0f) * r_colorscale,
1517                          ((i & 0x0038) >> 3) * (1.0f / 7.0f) * r_colorscale,
1518                          ((i & 0x01C0) >> 6) * (1.0f / 7.0f) * r_colorscale,
1519                          0.125f);
1520         if (PlaneDiff(r_origin, (&portal->plane)) > 0)
1521         {
1522                 for (i = portal->numpoints - 1, v = varray_vertex;i >= 0;i--, v += 4)
1523                         VectorCopy(portal->points[i].position, v);
1524         }
1525         else
1526                 for (i = 0, v = varray_vertex;i < portal->numpoints;i++, v += 4)
1527                         VectorCopy(portal->points[i].position, v);
1528         R_Mesh_Draw(portal->numpoints, portal->numpoints - 2, polygonelements);
1529 }
1530
1531 static void R_DrawPortals(entity_render_t *ent)
1532 {
1533         int i;
1534         mportal_t *portal, *endportal;
1535         float temp[3], center[3], f;
1536         if (ent->model == NULL)
1537                 return;
1538         for (portal = ent->model->portals, endportal = portal + ent->model->numportals;portal < endportal;portal++)
1539         {
1540                 if ((portal->here->pvsframe == ent->model->pvsframecount || portal->past->pvsframe == ent->model->pvsframecount) && portal->numpoints <= POLYGONELEMENTS_MAXPOINTS)
1541                 {
1542                         VectorClear(temp);
1543                         for (i = 0;i < portal->numpoints;i++)
1544                                 VectorAdd(temp, portal->points[i].position, temp);
1545                         f = ixtable[portal->numpoints];
1546                         VectorScale(temp, f, temp);
1547                         Matrix4x4_Transform(&ent->matrix, temp, center);
1548                         R_MeshQueue_AddTransparent(center, R_DrawPortal_Callback, ent, portal - ent->model->portals);
1549                 }
1550         }
1551 }
1552
1553 void R_PrepareBrushModel(entity_render_t *ent)
1554 {
1555         int i, numsurfaces, *surfacevisframes, *surfacepvsframes;
1556         msurface_t *surf;
1557         model_t *model;
1558 #if WORLDNODECULLBACKFACES
1559         vec3_t modelorg;
1560 #endif
1561
1562         // because bmodels can be reused, we have to decide which things to render
1563         // from scratch every time
1564         model = ent->model;
1565         if (model == NULL)
1566                 return;
1567 #if WORLDNODECULLBACKFACES
1568         Matrix4x4_Transform(&ent->inversematrix, r_origin, modelorg);
1569 #endif
1570         numsurfaces = model->nummodelsurfaces;
1571         surf = model->surfaces + model->firstmodelsurface;
1572         surfacevisframes = model->surfacevisframes + model->firstmodelsurface;
1573         surfacepvsframes = model->surfacepvsframes + model->firstmodelsurface;
1574         for (i = 0;i < numsurfaces;i++, surf++)
1575         {
1576 #if WORLDNODECULLBACKFACES
1577                 // mark any backface surfaces as not visible
1578                 if (PlaneDist(modelorg, surf->plane) < surf->plane->dist)
1579                 {
1580                         if ((surf->flags & SURF_PLANEBACK))
1581                                 surfacevisframes[i] = r_framecount;
1582                 }
1583                 else if (!(surf->flags & SURF_PLANEBACK))
1584                         surfacevisframes[i] = r_framecount;
1585 #else
1586                 surfacevisframes[i] = r_framecount;
1587 #endif
1588                 surf->dlightframe = -1;
1589         }
1590         R_PrepareSurfaces(ent);
1591 }
1592
1593 void R_SurfaceWorldNode (entity_render_t *ent)
1594 {
1595         int i, *surfacevisframes, *surfacepvsframes, surfnum;
1596         msurface_t *surf;
1597         mleaf_t *leaf;
1598         model_t *model;
1599         vec3_t modelorg;
1600
1601         // equivilant to quake's RecursiveWorldNode but faster and more effective
1602         model = ent->model;
1603         if (model == NULL)
1604                 return;
1605         surfacevisframes = model->surfacevisframes + model->firstmodelsurface;
1606         surfacepvsframes = model->surfacepvsframes + model->firstmodelsurface;
1607         Matrix4x4_Transform(&ent->inversematrix, r_origin, modelorg);
1608
1609         for (leaf = model->pvsleafchain;leaf;leaf = leaf->pvschain)
1610         {
1611                 if (!R_CullBox (leaf->mins, leaf->maxs))
1612                 {
1613                         c_leafs++;
1614                         leaf->visframe = r_framecount;
1615                 }
1616         }
1617
1618         for (i = 0;i < model->pvssurflistlength;i++)
1619         {
1620                 surfnum = model->pvssurflist[i];
1621                 surf = model->surfaces + surfnum;
1622 #if WORLDNODECULLBACKFACES
1623                 if (PlaneDist(modelorg, surf->plane) < surf->plane->dist)
1624                 {
1625                         if ((surf->flags & SURF_PLANEBACK) && !R_CullBox (surf->poly_mins, surf->poly_maxs))
1626                                 surfacevisframes[surfnum] = r_framecount;
1627                 }
1628                 else
1629                 {
1630                         if (!(surf->flags & SURF_PLANEBACK) && !R_CullBox (surf->poly_mins, surf->poly_maxs))
1631                                 surfacevisframes[surfnum] = r_framecount;
1632                 }
1633 #else
1634                 if (!R_CullBox (surf->poly_mins, surf->poly_maxs))
1635                         surfacevisframes[surfnum] = r_framecount;
1636 #endif
1637         }
1638 }
1639
1640 static void R_PortalWorldNode(entity_render_t *ent, mleaf_t *viewleaf)
1641 {
1642         int c, leafstackpos, *mark, *surfacevisframes;
1643 #if WORLDNODECULLBACKFACES
1644         int n;
1645         msurface_t *surf;
1646 #endif
1647         mleaf_t *leaf, *leafstack[8192];
1648         mportal_t *p;
1649         vec3_t modelorg;
1650         msurface_t *surfaces;
1651         if (ent->model == NULL)
1652                 return;
1653         // LordHavoc: portal-passage worldnode with PVS;
1654         // follows portals leading outward from viewleaf, does not venture
1655         // offscreen or into leafs that are not visible, faster than Quake's
1656         // RecursiveWorldNode
1657         surfaces = ent->model->surfaces;
1658         surfacevisframes = ent->model->surfacevisframes;
1659         Matrix4x4_Transform(&ent->inversematrix, r_origin, modelorg);
1660         viewleaf->worldnodeframe = r_framecount;
1661         leafstack[0] = viewleaf;
1662         leafstackpos = 1;
1663         while (leafstackpos)
1664         {
1665                 c_leafs++;
1666                 leaf = leafstack[--leafstackpos];
1667                 leaf->visframe = r_framecount;
1668                 // draw any surfaces bounding this leaf
1669                 if (leaf->nummarksurfaces)
1670                 {
1671                         for (c = leaf->nummarksurfaces, mark = leaf->firstmarksurface;c;c--)
1672                         {
1673 #if WORLDNODECULLBACKFACES
1674                                 n = *mark++;
1675                                 if (surfacevisframes[n] != r_framecount)
1676                                 {
1677                                         surf = surfaces + n;
1678                                         if (PlaneDist(modelorg, surf->plane) < surf->plane->dist)
1679                                         {
1680                                                 if ((surf->flags & SURF_PLANEBACK))
1681                                                         surfacevisframes[n] = r_framecount;
1682                                         }
1683                                         else
1684                                         {
1685                                                 if (!(surf->flags & SURF_PLANEBACK))
1686                                                         surfacevisframes[n] = r_framecount;
1687                                         }
1688                                 }
1689 #else
1690                                 surfacevisframes[*mark++] = r_framecount;
1691 #endif
1692                         }
1693                 }
1694                 // follow portals into other leafs
1695                 for (p = leaf->portals;p;p = p->next)
1696                 {
1697                         // LordHavoc: this DotProduct hurts less than a cache miss
1698                         // (which is more likely to happen if backflowing through leafs)
1699                         if (DotProduct(modelorg, p->plane.normal) < (p->plane.dist + 1))
1700                         {
1701                                 leaf = p->past;
1702                                 if (leaf->worldnodeframe != r_framecount)
1703                                 {
1704                                         leaf->worldnodeframe = r_framecount;
1705                                         // FIXME: R_CullBox is absolute, should be done relative
1706                                         if (leaf->pvsframe == ent->model->pvsframecount && !R_CullBox(leaf->mins, leaf->maxs))
1707                                                 leafstack[leafstackpos++] = leaf;
1708                                 }
1709                         }
1710                 }
1711         }
1712 }
1713
1714 void R_PVSUpdate (entity_render_t *ent, mleaf_t *viewleaf)
1715 {
1716         int i, j, l, c, bits, *surfacepvsframes, *mark;
1717         mleaf_t *leaf;
1718         qbyte *vis;
1719         model_t *model;
1720
1721         model = ent->model;
1722         if (model && (model->pvsviewleaf != viewleaf || model->pvsviewleafnovis != r_novis.integer))
1723         {
1724                 model->pvsframecount++;
1725                 model->pvsviewleaf = viewleaf;
1726                 model->pvsviewleafnovis = r_novis.integer;
1727                 model->pvsleafchain = NULL;
1728                 model->pvssurflistlength = 0;
1729                 if (viewleaf)
1730                 {
1731                         surfacepvsframes = model->surfacepvsframes;
1732                         vis = Mod_LeafPVS (viewleaf, model);
1733                         for (j = 0;j < model->numleafs;j += 8)
1734                         {
1735                                 bits = *vis++;
1736                                 if (bits)
1737                                 {
1738                                         l = model->numleafs - j;
1739                                         if (l > 8)
1740                                                 l = 8;
1741                                         for (i = 0;i < l;i++)
1742                                         {
1743                                                 if (bits & (1 << i))
1744                                                 {
1745                                                         leaf = &model->leafs[j + i + 1];
1746                                                         leaf->pvschain = model->pvsleafchain;
1747                                                         model->pvsleafchain = leaf;
1748                                                         leaf->pvsframe = model->pvsframecount;
1749                                                         // mark surfaces bounding this leaf as visible
1750                                                         for (c = leaf->nummarksurfaces, mark = leaf->firstmarksurface;c;c--, mark++)
1751                                                                 surfacepvsframes[*mark] = model->pvsframecount;
1752                                                 }
1753                                         }
1754                                 }
1755                         }
1756                         Mod_BuildPVSTextureChains(model);
1757                 }
1758         }
1759 }
1760
1761 void R_WorldVisibility (entity_render_t *ent)
1762 {
1763         vec3_t modelorg;
1764         mleaf_t *viewleaf;
1765
1766         Matrix4x4_Transform(&ent->inversematrix, r_origin, modelorg);
1767         viewleaf = Mod_PointInLeaf (modelorg, ent->model);
1768         R_PVSUpdate(ent, viewleaf);
1769
1770         if (!viewleaf)
1771                 return;
1772
1773         if (r_surfaceworldnode.integer || viewleaf->contents == CONTENTS_SOLID)
1774                 R_SurfaceWorldNode (ent);
1775         else
1776                 R_PortalWorldNode (ent, viewleaf);
1777 }
1778
1779 void R_DrawWorld (entity_render_t *ent)
1780 {
1781         if (ent->model == NULL)
1782                 return;
1783         R_PrepareSurfaces(ent);
1784         R_DrawSurfaces(ent, SHADERSTAGE_SKY, ent->model->pvstexturechains);
1785         R_DrawSurfaces(ent, SHADERSTAGE_NORMAL, ent->model->pvstexturechains);
1786         if (r_drawportals.integer)
1787                 R_DrawPortals(ent);
1788 }
1789
1790 void R_Model_Brush_DrawSky (entity_render_t *ent)
1791 {
1792         if (ent->model == NULL)
1793                 return;
1794         if (ent != &cl_entities[0].render)
1795                 R_PrepareBrushModel(ent);
1796         R_DrawSurfaces(ent, SHADERSTAGE_SKY, ent->model->pvstexturechains);
1797 }
1798
1799 void R_Model_Brush_Draw (entity_render_t *ent)
1800 {
1801         if (ent->model == NULL)
1802                 return;
1803         c_bmodels++;
1804         if (ent != &cl_entities[0].render)
1805                 R_PrepareBrushModel(ent);
1806         R_DrawSurfaces(ent, SHADERSTAGE_NORMAL, ent->model->pvstexturechains);
1807 }
1808
1809 void R_Model_Brush_DrawShadowVolume (entity_render_t *ent, vec3_t relativelightorigin, float lightradius)
1810 {
1811         int i;
1812         msurface_t *surf;
1813         float projectdistance, f, temp[3], lightradius2;
1814         surfmesh_t *mesh;
1815         if (ent->model == NULL)
1816                 return;
1817         R_Mesh_Matrix(&ent->matrix);
1818         lightradius2 = lightradius * lightradius;
1819         R_UpdateTextureInfo(ent);
1820         projectdistance = 1000000000.0f;//lightradius + ent->model->radius;
1821         for (i = 0, surf = ent->model->surfaces + ent->model->firstmodelsurface;i < ent->model->nummodelsurfaces;i++, surf++)
1822         {
1823                 if (surf->texinfo->texture->rendertype == SURFRENDER_OPAQUE && surf->flags & SURF_SHADOWCAST)
1824                 {
1825                         f = PlaneDiff(relativelightorigin, surf->plane);
1826                         if (surf->flags & SURF_PLANEBACK)
1827                                 f = -f;
1828                         // draw shadows only for frontfaces and only if they are close
1829                         if (f >= 0.1 && f < lightradius)
1830                         {
1831                                 temp[0] = bound(surf->poly_mins[0], relativelightorigin[0], surf->poly_maxs[0]) - relativelightorigin[0];
1832                                 temp[1] = bound(surf->poly_mins[1], relativelightorigin[1], surf->poly_maxs[1]) - relativelightorigin[1];
1833                                 temp[2] = bound(surf->poly_mins[2], relativelightorigin[2], surf->poly_maxs[2]) - relativelightorigin[2];
1834                                 if (DotProduct(temp, temp) < lightradius2)
1835                                 {
1836                                         for (mesh = surf->mesh;mesh;mesh = mesh->chain)
1837                                         {
1838                                                 R_Mesh_GetSpace(mesh->numverts);
1839                                                 memcpy(varray_vertex, mesh->verts, mesh->numverts * sizeof(float[4]));
1840                                                 R_Shadow_Volume(mesh->numverts, mesh->numtriangles, mesh->index, mesh->triangleneighbors, relativelightorigin, lightradius, projectdistance);
1841                                         }
1842                                 }
1843                         }
1844                 }
1845         }
1846 }
1847
1848 void R_Model_Brush_DrawLightForSurfaceList(entity_render_t *ent, vec3_t relativelightorigin, vec3_t relativeeyeorigin, float lightradius, float *lightcolor, msurface_t **surflist, int numsurfaces, const matrix4x4_t *matrix_modeltofilter, const matrix4x4_t *matrix_modeltoattenuationxyz, const matrix4x4_t *matrix_modeltoattenuationz)
1849 {
1850         int surfnum;
1851         msurface_t *surf;
1852         texture_t *t;
1853         surfmesh_t *mesh;
1854         if (ent->model == NULL)
1855                 return;
1856         R_Mesh_Matrix(&ent->matrix);
1857         R_UpdateTextureInfo(ent);
1858         for (surfnum = 0;surfnum < numsurfaces;surfnum++)
1859         {
1860                 surf = surflist[surfnum];
1861                 if (surf->visframe == r_framecount)
1862                 {
1863                         t = surf->texinfo->texture->currentframe;
1864                         if (t->rendertype == SURFRENDER_OPAQUE && t->flags & SURF_SHADOWLIGHT)
1865                         {
1866                                 for (mesh = surf->mesh;mesh;mesh = mesh->chain)
1867                                 {
1868                                         R_Shadow_DiffuseLighting(mesh->numverts, mesh->numtriangles, mesh->index, mesh->verts, mesh->svectors, mesh->tvectors, mesh->normals, mesh->str, relativelightorigin, lightradius, lightcolor, matrix_modeltofilter, matrix_modeltoattenuationxyz, matrix_modeltoattenuationz, t->skin.base, t->skin.nmap, NULL);
1869                                         R_Shadow_SpecularLighting(mesh->numverts, mesh->numtriangles, mesh->index, mesh->verts, mesh->svectors, mesh->tvectors, mesh->normals, mesh->str, relativelightorigin, relativeeyeorigin, lightradius, lightcolor, matrix_modeltofilter, matrix_modeltoattenuationxyz, matrix_modeltoattenuationz, t->skin.gloss, t->skin.nmap, NULL);
1870                                 }
1871                         }
1872                 }
1873         }
1874 }
1875
1876 void R_Model_Brush_DrawLight(entity_render_t *ent, vec3_t relativelightorigin, vec3_t relativeeyeorigin, float lightradius, float *lightcolor, const matrix4x4_t *matrix_modeltofilter, const matrix4x4_t *matrix_modeltoattenuationxyz, const matrix4x4_t *matrix_modeltoattenuationz)
1877 {
1878         int surfnum;
1879         msurface_t *surf;
1880         texture_t *t;
1881         float f, lightmins[3], lightmaxs[3];
1882         surfmesh_t *mesh;
1883         if (ent->model == NULL)
1884                 return;
1885         R_Mesh_Matrix(&ent->matrix);
1886         lightmins[0] = relativelightorigin[0] - lightradius;
1887         lightmins[1] = relativelightorigin[1] - lightradius;
1888         lightmins[2] = relativelightorigin[2] - lightradius;
1889         lightmaxs[0] = relativelightorigin[0] + lightradius;
1890         lightmaxs[1] = relativelightorigin[1] + lightradius;
1891         lightmaxs[2] = relativelightorigin[2] + lightradius;
1892         R_UpdateTextureInfo(ent);
1893         if (ent != &cl_entities[0].render)
1894         {
1895                 // bmodel, cull crudely to view and light
1896                 for (surfnum = 0, surf = ent->model->surfaces + ent->model->firstmodelsurface;surfnum < ent->model->nummodelsurfaces;surfnum++, surf++)
1897                 {
1898                         if (BoxesOverlap(surf->poly_mins, surf->poly_maxs, lightmins, lightmaxs))
1899                         {
1900                                 f = PlaneDiff(relativelightorigin, surf->plane);
1901                                 if (surf->flags & SURF_PLANEBACK)
1902                                         f = -f;
1903                                 if (f >= -0.1 && f < lightradius)
1904                                 {
1905                                         f = PlaneDiff(relativeeyeorigin, surf->plane);
1906                                         if (surf->flags & SURF_PLANEBACK)
1907                                                 f = -f;
1908                                         if (f > 0)
1909                                         {
1910                                                 t = surf->texinfo->texture->currentframe;
1911                                                 if (t->rendertype == SURFRENDER_OPAQUE && t->flags & SURF_SHADOWLIGHT)
1912                                                 {
1913                                                         for (mesh = surf->mesh;mesh;mesh = mesh->chain)
1914                                                         {
1915                                                                 R_Shadow_DiffuseLighting(mesh->numverts, mesh->numtriangles, mesh->index, mesh->verts, mesh->svectors, mesh->tvectors, mesh->normals, mesh->str, relativelightorigin, lightradius, lightcolor, matrix_modeltofilter, matrix_modeltoattenuationxyz, matrix_modeltoattenuationz, t->skin.base, t->skin.nmap, NULL);
1916                                                                 R_Shadow_SpecularLighting(mesh->numverts, mesh->numtriangles, mesh->index, mesh->verts, mesh->svectors, mesh->tvectors, mesh->normals, mesh->str, relativelightorigin, relativeeyeorigin, lightradius, lightcolor, matrix_modeltofilter, matrix_modeltoattenuationxyz, matrix_modeltoattenuationz, t->skin.gloss, t->skin.nmap, NULL);
1917                                                         }
1918                                                 }
1919                                         }
1920                                 }
1921                         }
1922                 }
1923         }
1924         else
1925         {
1926                 // world, already culled to view, just cull to light
1927                 for (surfnum = 0, surf = ent->model->surfaces + ent->model->firstmodelsurface;surfnum < ent->model->nummodelsurfaces;surfnum++, surf++)
1928                 {
1929                         if (surf->visframe == r_framecount && BoxesOverlap(surf->poly_mins, surf->poly_maxs, lightmins, lightmaxs))
1930                         {
1931                                 f = PlaneDiff(relativelightorigin, surf->plane);
1932                                 if (surf->flags & SURF_PLANEBACK)
1933                                         f = -f;
1934                                 if (f >= -0.1 && f < lightradius)
1935                                 {
1936                                         t = surf->texinfo->texture->currentframe;
1937                                         if (t->rendertype == SURFRENDER_OPAQUE && t->flags & SURF_SHADOWLIGHT)
1938                                         {
1939                                                 for (mesh = surf->mesh;mesh;mesh = mesh->chain)
1940                                                 {
1941                                                         R_Shadow_DiffuseLighting(mesh->numverts, mesh->numtriangles, mesh->index, mesh->verts, mesh->svectors, mesh->tvectors, mesh->normals, mesh->str, relativelightorigin, lightradius, lightcolor, matrix_modeltofilter, matrix_modeltoattenuationxyz, matrix_modeltoattenuationz, t->skin.base, t->skin.nmap, NULL);
1942                                                         R_Shadow_SpecularLighting(mesh->numverts, mesh->numtriangles, mesh->index, mesh->verts, mesh->svectors, mesh->tvectors, mesh->normals, mesh->str, relativelightorigin, relativeeyeorigin, lightradius, lightcolor, matrix_modeltofilter, matrix_modeltoattenuationxyz, matrix_modeltoattenuationz, t->skin.gloss, t->skin.nmap, NULL);
1943                                                 }
1944                                         }
1945                                 }
1946                         }
1947                 }
1948         }
1949 }
1950
1951 static void gl_surf_start(void)
1952 {
1953 }
1954
1955 static void gl_surf_shutdown(void)
1956 {
1957 }
1958
1959 static void gl_surf_newmap(void)
1960 {
1961 }
1962
1963 void GL_Surf_Init(void)
1964 {
1965         int i;
1966         dlightdivtable[0] = 4194304;
1967         for (i = 1;i < 32768;i++)
1968                 dlightdivtable[i] = 4194304 / (i << 7);
1969
1970         Cvar_RegisterVariable(&r_ambient);
1971         Cvar_RegisterVariable(&r_vertexsurfaces);
1972         Cvar_RegisterVariable(&r_dlightmap);
1973         Cvar_RegisterVariable(&r_drawportals);
1974         Cvar_RegisterVariable(&r_testvis);
1975         Cvar_RegisterVariable(&r_floatbuildlightmap);
1976         Cvar_RegisterVariable(&r_detailtextures);
1977         Cvar_RegisterVariable(&r_surfaceworldnode);
1978
1979         R_RegisterModule("GL_Surf", gl_surf_start, gl_surf_shutdown, gl_surf_newmap);
1980 }
1981