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", "0"};
  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, int dlightchanged)
 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                 surf->cached_lightmapscalebit = r_lightmapscalebit;
 245                 surf->cached_ambient = r_ambient.value;
 246                 surf->cached_light[0] = d_lightstylevalue[surf->styles[0]];
 247                 surf->cached_light[1] = d_lightstylevalue[surf->styles[1]];
 248                 surf->cached_light[2] = d_lightstylevalue[surf->styles[2]];
 249                 surf->cached_light[3] = d_lightstylevalue[surf->styles[3]];
 250
 251                 smax = (surf->extents[0]>>4)+1;
 252                 tmax = (surf->extents[1]>>4)+1;
 253                 size = smax*tmax;
 254                 size3 = size*3;
 255                 lightmap = surf->samples;
 256
 257         // set to full bright if no light data
 258                 bl = intblocklights;
 259                 if ((ent->effects & EF_FULLBRIGHT) || !ent->model->lightdata)
 260                 {
 261                         for (i = 0;i < size3;i++)
 262                                 bl[i] = 255*256;
 263                 }
 264                 else
 265                 {
 266         // clear to no light
 267                         j = r_ambient.value * 512.0f; // would be 128.0f logically, but using 512.0f to match winquake style
 268                         if (j)
 269                         {
 270                                 for (i = 0;i < size3;i++)
 271                                         *bl++ = j;
 272                         }
 273                         else
 274                                 memset(bl, 0, size*3*sizeof(unsigned int));
 275
 276                         if (surf->dlightframe == r_framecount && r_dlightmap.integer)
 277                         {
 278                                 surf->cached_dlight = R_IntAddDynamicLights(&ent->inversematrix, surf);
 279                                 if (surf->cached_dlight)
 280                                         c_light_polys++;
 281                                 else if (dlightchanged)
 282                                         return; // don't upload if only updating dlights and none mattered
 283                         }
 284
 285         // add all the lightmaps
 286                         if (lightmap)
 287                         {
 288                                 bl = intblocklights;
 289                                 for (maps = 0;maps < MAXLIGHTMAPS && surf->styles[maps] != 255;maps++, lightmap += size3)
 290                                         for (scale = d_lightstylevalue[surf->styles[maps]], i = 0;i < size3;i++)
 291                                                 bl[i] += lightmap[i] * scale;
 292                         }
 293                 }
 294
 295                 stain = surf->stainsamples;
 296                 bl = intblocklights;
 297                 out = templight;
 298                 // deal with lightmap brightness scale
 299                 shift = 7 + r_lightmapscalebit + 8;
 300                 if (ent->model->lightmaprgba)
 301                 {
 302                         stride = (surf->lightmaptexturestride - smax) * 4;
 303                         for (i = 0;i < tmax;i++, out += stride)
 304                         {
 305                                 for (j = 0;j < smax;j++)
 306                                 {
 307                                         l = (*bl++ * *stain++) >> shift;*out++ = min(l, 255);
 308                                         l = (*bl++ * *stain++) >> shift;*out++ = min(l, 255);
 309                                         l = (*bl++ * *stain++) >> shift;*out++ = min(l, 255);
 310                                         *out++ = 255;
 311                                 }
 312                         }
 313                 }
 314                 else
 315                 {
 316                         stride = (surf->lightmaptexturestride - smax) * 3;
 317                         for (i = 0;i < tmax;i++, out += stride)
 318                         {
 319                                 for (j = 0;j < smax;j++)
 320                                 {
 321                                         l = (*bl++ * *stain++) >> shift;*out++ = min(l, 255);
 322                                         l = (*bl++ * *stain++) >> shift;*out++ = min(l, 255);
 323                                         l = (*bl++ * *stain++) >> shift;*out++ = min(l, 255);
 324                                 }
 325                         }
 326                 }
 327
 328                 R_UpdateTexture(surf->lightmaptexture, templight);
 329         }
 330         else
 331         {
 332                 int smax, tmax, i, j, size, size3, maps, stride, l;
 333                 float *bl, scale;
 334                 qbyte *lightmap, *out, *stain;
 335
 336                 // update cached lighting info
 337                 surf->cached_dlight = 0;
 338                 surf->cached_lightmapscalebit = r_lightmapscalebit;
 339                 surf->cached_ambient = r_ambient.value;
 340                 surf->cached_light[0] = d_lightstylevalue[surf->styles[0]];
 341                 surf->cached_light[1] = d_lightstylevalue[surf->styles[1]];
 342                 surf->cached_light[2] = d_lightstylevalue[surf->styles[2]];
 343                 surf->cached_light[3] = d_lightstylevalue[surf->styles[3]];
 344
 345                 smax = (surf->extents[0]>>4)+1;
 346                 tmax = (surf->extents[1]>>4)+1;
 347                 size = smax*tmax;
 348                 size3 = size*3;
 349                 lightmap = surf->samples;
 350
 351         // set to full bright if no light data
 352                 bl = floatblocklights;
 353                 if ((ent->effects & EF_FULLBRIGHT) || !ent->model->lightdata)
 354                         j = 255*256;
 355                 else
 356                         j = r_ambient.value * 512.0f; // would be 128.0f logically, but using 512.0f to match winquake style
 357
 358                 // clear to no light
 359                 if (j)
 360                 {
 361                         for (i = 0;i < size3;i++)
 362                                 *bl++ = j;
 363                 }
 364                 else
 365                         memset(bl, 0, size*3*sizeof(float));
 366
 367                 if (surf->dlightframe == r_framecount && r_dlightmap.integer)
 368                 {
 369                         surf->cached_dlight = R_FloatAddDynamicLights(&ent->inversematrix, surf);
 370                         if (surf->cached_dlight)
 371                                 c_light_polys++;
 372                         else if (dlightchanged)
 373                                 return; // don't upload if only updating dlights and none mattered
 374                 }
 375
 376                 // add all the lightmaps
 377                 if (lightmap)
 378                 {
 379                         bl = floatblocklights;
 380                         for (maps = 0;maps < MAXLIGHTMAPS && surf->styles[maps] != 255;maps++, lightmap += size3)
 381                                 for (scale = d_lightstylevalue[surf->styles[maps]], i = 0;i < size3;i++)
 382                                         bl[i] += lightmap[i] * scale;
 383                 }
 384
 385                 stain = surf->stainsamples;
 386                 bl = floatblocklights;
 387                 out = templight;
 388                 // deal with lightmap brightness scale
 389                 scale = 1.0f / (1 << (7 + r_lightmapscalebit + 8));
 390                 if (ent->model->lightmaprgba)
 391                 {
 392                         stride = (surf->lightmaptexturestride - smax) * 4;
 393                         for (i = 0;i < tmax;i++, out += stride)
 394                         {
 395                                 for (j = 0;j < smax;j++)
 396                                 {
 397                                         l = *bl++ * *stain++ * scale;*out++ = min(l, 255);
 398                                         l = *bl++ * *stain++ * scale;*out++ = min(l, 255);
 399                                         l = *bl++ * *stain++ * scale;*out++ = min(l, 255);
 400                                         *out++ = 255;
 401                                 }
 402                         }
 403                 }
 404                 else
 405                 {
 406                         stride = (surf->lightmaptexturestride - smax) * 3;
 407                         for (i = 0;i < tmax;i++, out += stride)
 408                         {
 409                                 for (j = 0;j < smax;j++)
 410                                 {
 411                                         l = *bl++ * *stain++ * scale;*out++ = min(l, 255);
 412                                         l = *bl++ * *stain++ * scale;*out++ = min(l, 255);
 413                                         l = *bl++ * *stain++ * scale;*out++ = min(l, 255);
 414                                 }
 415                         }
 416                 }
 417
 418                 R_UpdateTexture(surf->lightmaptexture, templight);
 419         }
 420 }
 421
 422 void R_StainNode (mnode_t *node, model_t *model, vec3_t origin, float radius, float fcolor[8])
 423 {
 424         float ndist, a, ratio, maxdist, maxdist2, maxdist3, invradius, sdtable[256], td, dist2;
 425         msurface_t *surf, *endsurf;
 426         int i, s, t, smax, tmax, smax3, impacts, impactt, stained;
 427         qbyte *bl;
 428         vec3_t impact;
 429
 430         maxdist = radius * radius;
 431         invradius = 1.0f / radius;
 432
 433 loc0:
 434         if (node->contents < 0)
 435                 return;
 436         ndist = PlaneDiff(origin, node->plane);
 437         if (ndist > radius)
 438         {
 439                 node = node->children[0];
 440                 goto loc0;
 441         }
 442         if (ndist < -radius)
 443         {
 444                 node = node->children[1];
 445                 goto loc0;
 446         }
 447
 448         dist2 = ndist * ndist;
 449         maxdist3 = maxdist - dist2;
 450
 451         if (node->plane->type < 3)
 452         {
 453                 VectorCopy(origin, impact);
 454                 impact[node->plane->type] -= ndist;
 455         }
 456         else
 457         {
 458                 impact[0] = origin[0] - node->plane->normal[0] * ndist;
 459                 impact[1] = origin[1] - node->plane->normal[1] * ndist;
 460                 impact[2] = origin[2] - node->plane->normal[2] * ndist;
 461         }
 462
 463         for (surf = model->surfaces + node->firstsurface, endsurf = surf + node->numsurfaces;surf < endsurf;surf++)
 464         {
 465                 if (surf->stainsamples)
 466                 {
 467                         smax = (surf->extents[0] >> 4) + 1;
 468                         tmax = (surf->extents[1] >> 4) + 1;
 469
 470                         impacts = DotProduct (impact, surf->texinfo->vecs[0]) + surf->texinfo->vecs[0][3] - surf->texturemins[0];
 471                         impactt = DotProduct (impact, surf->texinfo->vecs[1]) + surf->texinfo->vecs[1][3] - surf->texturemins[1];
 472
 473                         s = bound(0, impacts, smax * 16) - impacts;
 474                         t = bound(0, impactt, tmax * 16) - impactt;
 475                         i = s * s + t * t + dist2;
 476                         if (i > maxdist)
 477                                 continue;
 478
 479                         // reduce calculations
 480                         for (s = 0, i = impacts; s < smax; s++, i -= 16)
 481                                 sdtable[s] = i * i + dist2;
 482
 483                         bl = surf->stainsamples;
 484                         smax3 = smax * 3;
 485                         stained = false;
 486
 487                         i = impactt;
 488                         for (t = 0;t < tmax;t++, i -= 16)
 489                         {
 490                                 td = i * i;
 491                                 // make sure some part of it is visible on this line
 492                                 if (td < maxdist3)
 493                                 {
 494                                         maxdist2 = maxdist - td;
 495                                         for (s = 0;s < smax;s++)
 496                                         {
 497                                                 if (sdtable[s] < maxdist2)
 498                                                 {
 499                                                         ratio = lhrandom(0.0f, 1.0f);
 500                                                         a = (fcolor[3] + ratio * fcolor[7]) * (1.0f - sqrt(sdtable[s] + td) * invradius);
 501                                                         if (a >= (1.0f / 64.0f))
 502                                                         {
 503                                                                 if (a > 1)
 504                                                                         a = 1;
 505                                                                 bl[0] = (qbyte) ((float) bl[0] + a * ((fcolor[0] + ratio * fcolor[4]) - (float) bl[0]));
 506                                                                 bl[1] = (qbyte) ((float) bl[1] + a * ((fcolor[1] + ratio * fcolor[5]) - (float) bl[1]));
 507                                                                 bl[2] = (qbyte) ((float) bl[2] + a * ((fcolor[2] + ratio * fcolor[6]) - (float) bl[2]));
 508                                                                 stained = true;
 509                                                         }
 510                                                 }
 511                                                 bl += 3;
 512                                         }
 513                                 }
 514                                 else // skip line
 515                                         bl += smax3;
 516                         }
 517                         // force lightmap upload
 518                         if (stained)
 519                                 surf->cached_dlight = true;
 520                 }
 521         }
 522
 523         if (node->children[0]->contents >= 0)
 524         {
 525                 if (node->children[1]->contents >= 0)
 526                 {
 527                         R_StainNode(node->children[0], model, origin, radius, fcolor);
 528                         node = node->children[1];
 529                         goto loc0;
 530                 }
 531                 else
 532                 {
 533                         node = node->children[0];
 534                         goto loc0;
 535                 }
 536         }
 537         else if (node->children[1]->contents >= 0)
 538         {
 539                 node = node->children[1];
 540                 goto loc0;
 541         }
 542 }
 543
 544 void R_Stain (vec3_t origin, float radius, int cr1, int cg1, int cb1, int ca1, int cr2, int cg2, int cb2, int ca2)
 545 {
 546         int n;
 547         float fcolor[8];
 548         entity_render_t *ent;
 549         model_t *model;
 550         vec3_t org;
 551         fcolor[0] = cr1;
 552         fcolor[1] = cg1;
 553         fcolor[2] = cb1;
 554         fcolor[3] = ca1 * (1.0f / 64.0f);
 555         fcolor[4] = cr2 - cr1;
 556         fcolor[5] = cg2 - cg1;
 557         fcolor[6] = cb2 - cb1;
 558         fcolor[7] = (ca2 - ca1) * (1.0f / 64.0f);
 559
 560         model = cl.worldmodel;
 561         if (model)
 562                 R_StainNode(model->nodes + model->hulls[0].firstclipnode, model, origin, radius, fcolor);
 563
 564         // look for embedded bmodels
 565         for (n = 0;n < cl_num_brushmodel_entities;n++)
 566         {
 567                 ent = cl_brushmodel_entities[n];
 568                 model = ent->model;
 569                 if (model && model->name[0] == '*')
 570                 {
 571                         Mod_CheckLoaded(model);
 572                         if (model->type == mod_brush)
 573                         {
 574                                 Matrix4x4_Transform(&ent->inversematrix, origin, org);
 575                                 R_StainNode(model->nodes + model->hulls[0].firstclipnode, model, org, radius, fcolor);
 576                         }
 577                 }
 578         }
 579 }
 580
 581
 582 /*
 583 =============================================================
 584
 585         BRUSH MODELS
 586
 587 =============================================================
 588 */
 589
 590 static void RSurf_AddLightmapToVertexColors(const int *lightmapoffsets, float *c, int numverts, const qbyte *samples, int size3, const qbyte *styles)
 591 {
 592         int i;
 593         float scale;
 594         const qbyte *lm;
 595         if (styles[0] != 255)
 596         {
 597                 for (i = 0;i < numverts;i++, c += 4)
 598                 {
 599                         lm = samples + lightmapoffsets[i];
 600                         scale = d_lightstylevalue[styles[0]] * (1.0f / 32768.0f);
 601                         VectorMA(c, scale, lm, c);
 602                         if (styles[1] != 255)
 603                         {
 604                                 lm += size3;
 605                                 scale = d_lightstylevalue[styles[1]] * (1.0f / 32768.0f);
 606                                 VectorMA(c, scale, lm, c);
 607                                 if (styles[2] != 255)
 608                                 {
 609                                         lm += size3;
 610                                         scale = d_lightstylevalue[styles[2]] * (1.0f / 32768.0f);
 611                                         VectorMA(c, scale, lm, c);
 612                                         if (styles[3] != 255)
 613                                         {
 614                                                 lm += size3;
 615                                                 scale = d_lightstylevalue[styles[3]] * (1.0f / 32768.0f);
 616                                                 VectorMA(c, scale, lm, c);
 617                                         }
 618                                 }
 619                         }
 620                 }
 621         }
 622 }
 623
 624 static void RSurf_FogColors(const float *v, float *c, float colorscale, int numverts, const float *modelorg)
 625 {
 626         int i;
 627         float diff[3], f;
 628         if (fogenabled)
 629         {
 630                 for (i = 0;i < numverts;i++, v += 4, c += 4)
 631                 {
 632                         VectorSubtract(v, modelorg, diff);
 633                         f = colorscale * (1 - exp(fogdensity/DotProduct(diff, diff)));
 634                         VectorScale(c, f, c);
 635                 }
 636         }
 637         else if (colorscale != 1)
 638                 for (i = 0;i < numverts;i++, c += 4)
 639                         VectorScale(c, colorscale, c);
 640 }
 641
 642 static void RSurf_FoggedColors(const float *v, float *c, float r, float g, float b, float a, float colorscale, int numverts, const float *modelorg)
 643 {
 644         int i;
 645         float diff[3], f;
 646         r *= colorscale;
 647         g *= colorscale;
 648         b *= colorscale;
 649         if (fogenabled)
 650         {
 651                 for (i = 0;i < numverts;i++, v += 4, c += 4)
 652                 {
 653                         VectorSubtract(v, modelorg, diff);
 654                         f = 1 - exp(fogdensity/DotProduct(diff, diff));
 655                         c[0] = r * f;
 656                         c[1] = g * f;
 657                         c[2] = b * f;
 658                         c[3] = a;
 659                 }
 660         }
 661         else
 662         {
 663                 for (i = 0;i < numverts;i++, c += 4)
 664                 {
 665                         c[0] = r;
 666                         c[1] = g;
 667                         c[2] = b;
 668                         c[3] = a;
 669                 }
 670         }
 671 }
 672
 673 static void RSurf_FogPassColors(const float *v, float *c, float r, float g, float b, float a, float colorscale, int numverts, const float *modelorg)
 674 {
 675         int i;
 676         float diff[3], f;
 677         r *= colorscale;
 678         g *= colorscale;
 679         b *= colorscale;
 680         for (i = 0;i < numverts;i++, v += 4, c += 4)
 681         {
 682                 VectorSubtract(v, modelorg, diff);
 683                 f = exp(fogdensity/DotProduct(diff, diff));
 684                 c[0] = r;
 685                 c[1] = g;
 686                 c[2] = b;
 687                 c[3] = a * f;
 688         }
 689 }
 690
 691 static void RSurf_ScaleColors(float *c, float scale, int numverts)
 692 {
 693         int i;
 694         if (scale != 1)
 695                 for (i = 0;i < numverts;i++, c += 4)
 696                         VectorScale(c, scale, c);
 697 }
 698
 699 static int RSurf_LightSeparate(const matrix4x4_t *matrix, const int *dlightbits, int numverts, const float *vert, float *color)
 700 {
 701         float f;
 702         const float *v;
 703         float *c;
 704         int i, l, lit = false;
 705         const rdlight_t *rd;
 706         vec3_t lightorigin;
 707         for (l = 0;l < r_numdlights;l++)
 708         {
 709                 if (dlightbits[l >> 5] & (1 << (l & 31)))
 710                 {
 711                         rd = &r_dlight[l];
 712                         Matrix4x4_Transform(matrix, rd->origin, lightorigin);
 713                         for (i = 0, v = vert, c = color;i < numverts;i++, v += 4, c += 4)
 714                         {
 715                                 f = VectorDistance2(v, lightorigin) + LIGHTOFFSET;
 716                                 if (f < rd->cullradius2)
 717                                 {
 718                                         f = (1.0f / f) - rd->subtract;
 719                                         VectorMA(c, f, rd->light, c);
 720                                         lit = true;
 721                                 }
 722                         }
 723                 }
 724         }
 725         return lit;
 726 }
 727
 728 // note: this untransforms lights to do the checking,
 729 // and takes surf->mesh->verts data
 730 static int RSurf_LightCheck(const matrix4x4_t *matrix, const int *dlightbits, const surfmesh_t *mesh)
 731 {
 732         int i, l;
 733         const rdlight_t *rd;
 734         vec3_t lightorigin;
 735         const float *v;
 736         for (l = 0;l < r_numdlights;l++)
 737         {
 738                 if (dlightbits[l >> 5] & (1 << (l & 31)))
 739                 {
 740                         rd = &r_dlight[l];
 741                         Matrix4x4_Transform(matrix, rd->origin, lightorigin);
 742                         for (i = 0, v = mesh->verts;i < mesh->numverts;i++, v += 4)
 743                                 if (VectorDistance2(v, lightorigin) < rd->cullradius2)
 744                                         return true;
 745                 }
 746         }
 747         return false;
 748 }
 749
 750 static void RSurfShader_Sky(const entity_render_t *ent, const texture_t *texture, const msurface_t *firstsurf)
 751 {
 752         const msurface_t *surf;
 753         const surfmesh_t *mesh;
 754         rmeshstate_t m;
 755
 756         // LordHavoc: HalfLife maps have freaky skypolys...
 757         if (ent->model->ishlbsp)
 758                 return;
 759
 760         if (skyrendernow)
 761         {
 762                 skyrendernow = false;
 763                 if (skyrendermasked)
 764                         R_Sky();
 765         }
 766
 767         R_Mesh_Matrix(&ent->matrix);
 768
 769         // draw depth-only polys
 770         memset(&m, 0, sizeof(m));
 771         if (skyrendermasked)
 772         {
 773                 qglColorMask(0,0,0,0);
 774                 // just to make sure that braindead drivers don't draw anything
 775                 // despite that colormask...
 776                 m.blendfunc1 = GL_ZERO;
 777                 m.blendfunc2 = GL_ONE;
 778         }
 779         else
 780         {
 781                 // fog sky
 782                 m.blendfunc1 = GL_ONE;
 783                 m.blendfunc2 = GL_ZERO;
 784         }
 785         m.depthwrite = true;
 786         R_Mesh_State(&m);
 787         for (surf = firstsurf;surf;surf = surf->texturechain)
 788         {
 789                 if (surf->visframe == r_framecount)
 790                 {
 791                         for (mesh = surf->mesh;mesh;mesh = mesh->chain)
 792                         {
 793                                 R_Mesh_ResizeCheck(mesh->numverts);
 794                                 memcpy(varray_vertex, mesh->verts, mesh->numverts * sizeof(float[4]));
 795                                 GL_Color(fogcolor[0] * r_colorscale, fogcolor[1] * r_colorscale, fogcolor[2] * r_colorscale, 1);
 796                                 R_Mesh_Draw(mesh->numverts, mesh->numtriangles, mesh->index);
 797                         }
 798                 }
 799         }
 800         qglColorMask(1,1,1,1);
 801 }
 802
 803 static void RSurfShader_Water_Callback(const void *calldata1, int calldata2)
 804 {
 805         const entity_render_t *ent = calldata1;
 806         const msurface_t *surf = ent->model->surfaces + calldata2;
 807         float f, colorscale;
 808         const surfmesh_t *mesh;
 809         rmeshstate_t m;
 810         float alpha;
 811         float modelorg[3];
 812         texture_t *texture;
 813         Matrix4x4_Transform(&ent->inversematrix, r_origin, modelorg);
 814
 815         R_Mesh_Matrix(&ent->matrix);
 816
 817         memset(&m, 0, sizeof(m));
 818         texture = surf->texinfo->texture->currentframe;
 819         alpha = texture->currentalpha;
 820         if (texture->rendertype == SURFRENDER_ADD)
 821         {
 822                 m.blendfunc1 = GL_SRC_ALPHA;
 823                 m.blendfunc2 = GL_ONE;
 824         }
 825         else if (texture->rendertype == SURFRENDER_ALPHA)
 826         {
 827                 m.blendfunc1 = GL_SRC_ALPHA;
 828                 m.blendfunc2 = GL_ONE_MINUS_SRC_ALPHA;
 829         }
 830         else
 831         {
 832                 m.blendfunc1 = GL_ONE;
 833                 m.blendfunc2 = GL_ZERO;
 834         }
 835         m.tex[0] = R_GetTexture(texture->texture);
 836         colorscale = r_colorscale;
 837         if (gl_combine.integer)
 838         {
 839                 m.texrgbscale[0] = 4;
 840                 colorscale *= 0.25f;
 841         }
 842         R_Mesh_State(&m);
 843         GL_UseColorArray();
 844         for (mesh = surf->mesh;mesh;mesh = mesh->chain)
 845         {
 846                 R_Mesh_ResizeCheck(mesh->numverts);
 847                 memcpy(varray_vertex, mesh->verts, mesh->numverts * sizeof(float[4]));
 848                 memcpy(varray_texcoord[0], mesh->str, mesh->numverts * sizeof(float[4]));
 849                 f = surf->flags & SURF_DRAWFULLBRIGHT ? 1.0f : ((surf->flags & SURF_LIGHTMAP) ? 0 : 0.5f);
 850                 R_FillColors(varray_color, mesh->numverts, f, f, f, alpha);
 851                 if (!(surf->flags & SURF_DRAWFULLBRIGHT || ent->effects & EF_FULLBRIGHT))
 852                 {
 853                         if (surf->dlightframe == r_framecount)
 854                                 RSurf_LightSeparate(&ent->inversematrix, surf->dlightbits, mesh->numverts, varray_vertex, varray_color);
 855                         if (surf->flags & SURF_LIGHTMAP)
 856                                 RSurf_AddLightmapToVertexColors(mesh->lightmapoffsets, varray_color, mesh->numverts, surf->samples, ((surf->extents[0]>>4)+1)*((surf->extents[1]>>4)+1)*3, surf->styles);
 857                 }
 858                 RSurf_FogColors(varray_vertex, varray_color, colorscale, mesh->numverts, modelorg);
 859                 R_Mesh_Draw(mesh->numverts, mesh->numtriangles, mesh->index);
 860         }
 861
 862         if (fogenabled)
 863         {
 864                 memset(&m, 0, sizeof(m));
 865                 m.blendfunc1 = GL_SRC_ALPHA;
 866                 m.blendfunc2 = GL_ONE;
 867                 m.tex[0] = R_GetTexture(texture->fogtexture);
 868                 R_Mesh_State(&m);
 869                 for (mesh = surf->mesh;mesh;mesh = mesh->chain)
 870                 {
 871                         R_Mesh_ResizeCheck(mesh->numverts);
 872                         memcpy(varray_vertex, mesh->verts, mesh->numverts * sizeof(float[4]));
 873                         if (m.tex[0])
 874                                 memcpy(varray_texcoord[0], mesh->str, mesh->numverts * sizeof(float[4]));
 875                         RSurf_FogPassColors(varray_vertex, varray_color, fogcolor[0], fogcolor[1], fogcolor[2], alpha, r_colorscale, mesh->numverts, modelorg);
 876                         R_Mesh_Draw(mesh->numverts, mesh->numtriangles, mesh->index);
 877                 }
 878         }
 879 }
 880
 881 static void RSurfShader_Water(const entity_render_t *ent, const texture_t *texture, const msurface_t *firstsurf)
 882 {
 883         const msurface_t *surf;
 884         vec3_t center;
 885         if (texture->rendertype != SURFRENDER_OPAQUE)
 886         {
 887                 for (surf = firstsurf;surf;surf = surf->texturechain)
 888                 {
 889                         if (surf->visframe == r_framecount)
 890                         {
 891                                 Matrix4x4_Transform(&ent->matrix, surf->poly_center, center);
 892                                 R_MeshQueue_AddTransparent(center, RSurfShader_Water_Callback, ent, surf - ent->model->surfaces);
 893                         }
 894                 }
 895         }
 896         else
 897                 for (surf = firstsurf;surf;surf = surf->texturechain)
 898                         if (surf->visframe == r_framecount)
 899                                 RSurfShader_Water_Callback(ent, surf - ent->model->surfaces);
 900 }
 901
 902 static void RSurfShader_Wall_Pass_BaseVertex(const entity_render_t *ent, const msurface_t *surf, const texture_t *texture, int rendertype, float currentalpha)
 903 {
 904         float base, colorscale;
 905         const surfmesh_t *mesh;
 906         rmeshstate_t m;
 907         float modelorg[3];
 908         Matrix4x4_Transform(&ent->inversematrix, r_origin, modelorg);
 909         memset(&m, 0, sizeof(m));
 910         if (rendertype == SURFRENDER_ADD)
 911         {
 912                 m.blendfunc1 = GL_SRC_ALPHA;
 913                 m.blendfunc2 = GL_ONE;
 914         }
 915         else if (rendertype == SURFRENDER_ALPHA)
 916         {
 917                 m.blendfunc1 = GL_SRC_ALPHA;
 918                 m.blendfunc2 = GL_ONE_MINUS_SRC_ALPHA;
 919         }
 920         else
 921         {
 922                 m.blendfunc1 = GL_ONE;
 923                 m.blendfunc2 = GL_ZERO;
 924         }
 925         m.tex[0] = R_GetTexture(texture->texture);
 926         colorscale = r_colorscale;
 927         if (gl_combine.integer)
 928         {
 929                 m.texrgbscale[0] = 4;
 930                 colorscale *= 0.25f;
 931         }
 932         base = ent->effects & EF_FULLBRIGHT ? 2.0f : r_ambient.value * (1.0f / 64.0f);
 933         R_Mesh_State(&m);
 934         GL_UseColorArray();
 935         for (mesh = surf->mesh;mesh;mesh = mesh->chain)
 936         {
 937                 R_Mesh_ResizeCheck(mesh->numverts);
 938                 memcpy(varray_vertex, mesh->verts, mesh->numverts * sizeof(float[4]));
 939                 memcpy(varray_texcoord[0], mesh->str, mesh->numverts * sizeof(float[4]));
 940                 R_FillColors(varray_color, mesh->numverts, base, base, base, currentalpha);
 941                 if (!(ent->effects & EF_FULLBRIGHT))
 942                 {
 943                         if (surf->dlightframe == r_framecount)
 944                                 RSurf_LightSeparate(&ent->inversematrix, surf->dlightbits, mesh->numverts, varray_vertex, varray_color);
 945                         if (surf->flags & SURF_LIGHTMAP)
 946                                 RSurf_AddLightmapToVertexColors(mesh->lightmapoffsets, varray_color, mesh->numverts, surf->samples, ((surf->extents[0]>>4)+1)*((surf->extents[1]>>4)+1)*3, surf->styles);
 947                 }
 948                 RSurf_FogColors(varray_vertex, varray_color, colorscale, mesh->numverts, modelorg);
 949                 R_Mesh_Draw(mesh->numverts, mesh->numtriangles, mesh->index);
 950         }
 951 }
 952
 953 static void RSurfShader_Wall_Pass_Glow(const entity_render_t *ent, const msurface_t *surf, const texture_t *texture, int rendertype, float currentalpha)
 954 {
 955         const surfmesh_t *mesh;
 956         rmeshstate_t m;
 957         float modelorg[3];
 958         Matrix4x4_Transform(&ent->inversematrix, r_origin, modelorg);
 959         memset(&m, 0, sizeof(m));
 960         m.blendfunc1 = GL_SRC_ALPHA;
 961         m.blendfunc2 = GL_ONE;
 962         m.tex[0] = R_GetTexture(texture->glowtexture);
 963         R_Mesh_State(&m);
 964         GL_UseColorArray();
 965         for (mesh = surf->mesh;mesh;mesh = mesh->chain)
 966         {
 967                 R_Mesh_ResizeCheck(mesh->numverts);
 968                 memcpy(varray_vertex, mesh->verts, mesh->numverts * sizeof(float[4]));
 969                 memcpy(varray_texcoord[0], mesh->str, mesh->numverts * sizeof(float[4]));
 970                 RSurf_FoggedColors(varray_vertex, varray_color, 1, 1, 1, currentalpha, r_colorscale, mesh->numverts, modelorg);
 971                 R_Mesh_Draw(mesh->numverts, mesh->numtriangles, mesh->index);
 972         }
 973 }
 974
 975 static void RSurfShader_Wall_Pass_Fog(const entity_render_t *ent, const msurface_t *surf, const texture_t *texture, int rendertype, float currentalpha)
 976 {
 977         const surfmesh_t *mesh;
 978         rmeshstate_t m;
 979         float modelorg[3];
 980         Matrix4x4_Transform(&ent->inversematrix, r_origin, modelorg);
 981         memset(&m, 0, sizeof(m));
 982         m.blendfunc1 = GL_SRC_ALPHA;
 983         m.blendfunc2 = GL_ONE;
 984         m.tex[0] = R_GetTexture(texture->fogtexture);
 985         R_Mesh_State(&m);
 986         GL_UseColorArray();
 987         for (mesh = surf->mesh;mesh;mesh = mesh->chain)
 988         {
 989                 R_Mesh_ResizeCheck(mesh->numverts);
 990                 memcpy(varray_vertex, mesh->verts, mesh->numverts * sizeof(float[4]));
 991                 if (m.tex[0])
 992                         memcpy(varray_texcoord[0], mesh->str, mesh->numverts * sizeof(float[4]));
 993                 RSurf_FogPassColors(varray_vertex, varray_color, fogcolor[0], fogcolor[1], fogcolor[2], currentalpha, r_colorscale, mesh->numverts, modelorg);
 994                 R_Mesh_Draw(mesh->numverts, mesh->numtriangles, mesh->index);
 995         }
 996 }
 997
 998 static void RSurfShader_OpaqueWall_Pass_BaseTripleTexCombine(const entity_render_t *ent, const texture_t *texture, const msurface_t *firstsurf)
 999 {
1000         const msurface_t *surf;
1001         const surfmesh_t *mesh;
1002         rmeshstate_t m;
1003         int lightmaptexturenum;
1004         float cl;
1005         memset(&m, 0, sizeof(m));
1006         m.blendfunc1 = GL_ONE;
1007         m.blendfunc2 = GL_ZERO;
1008         m.tex[0] = R_GetTexture(texture->texture);
1009         m.tex[1] = R_GetTexture(firstsurf->lightmaptexture);
1010         m.tex[2] = R_GetTexture(texture->detailtexture);
1011         m.texrgbscale[0] = 1;
1012         m.texrgbscale[1] = 4;
1013         m.texrgbscale[2] = 2;
1014         R_Mesh_State(&m);
1015         cl = (float) (1 << r_lightmapscalebit) * r_colorscale;
1016         GL_Color(cl, cl, cl, 1);
1017         for (surf = firstsurf;surf;surf = surf->texturechain)
1018         {
1019                 if (surf->visframe == r_framecount)
1020                 {
1021                         lightmaptexturenum = R_GetTexture(surf->lightmaptexture);
1022                         if (m.tex[1] != lightmaptexturenum)
1023                         {
1024                                 m.tex[1] = lightmaptexturenum;
1025                                 R_Mesh_State(&m);
1026                         }
1027                         for (mesh = surf->mesh;mesh;mesh = mesh->chain)
1028                         {
1029                                 R_Mesh_ResizeCheck(mesh->numverts);
1030                                 memcpy(varray_vertex, mesh->verts, mesh->numverts * sizeof(float[4]));
1031                                 memcpy(varray_texcoord[0], mesh->str, mesh->numverts * sizeof(float[4]));
1032                                 memcpy(varray_texcoord[1], mesh->uvw, mesh->numverts * sizeof(float[4]));
1033                                 memcpy(varray_texcoord[2], mesh->abc, mesh->numverts * sizeof(float[4]));
1034                                 R_Mesh_Draw(mesh->numverts, mesh->numtriangles, mesh->index);
1035                         }
1036                 }
1037         }
1038 }
1039
1040 static void RSurfShader_OpaqueWall_Pass_BaseDoubleTex(const entity_render_t *ent, const texture_t *texture, const msurface_t *firstsurf)
1041 {
1042         const msurface_t *surf;
1043         const surfmesh_t *mesh;
1044         rmeshstate_t m;
1045         int lightmaptexturenum;
1046         memset(&m, 0, sizeof(m));
1047         m.blendfunc1 = GL_ONE;
1048         m.blendfunc2 = GL_ZERO;
1049         m.tex[0] = R_GetTexture(texture->texture);
1050         m.tex[1] = R_GetTexture(firstsurf->lightmaptexture);
1051         if (gl_combine.integer)
1052                 m.texrgbscale[1] = 4;
1053         R_Mesh_State(&m);
1054         GL_Color(r_colorscale, r_colorscale, r_colorscale, 1);
1055         for (surf = firstsurf;surf;surf = surf->texturechain)
1056         {
1057                 if (surf->visframe == r_framecount)
1058                 {
1059                         lightmaptexturenum = R_GetTexture(surf->lightmaptexture);
1060                         if (m.tex[1] != lightmaptexturenum)
1061                         {
1062                                 m.tex[1] = lightmaptexturenum;
1063                                 R_Mesh_State(&m);
1064                         }
1065                         for (mesh = surf->mesh;mesh;mesh = mesh->chain)
1066                         {
1067                                 R_Mesh_ResizeCheck(mesh->numverts);
1068                                 memcpy(varray_vertex, mesh->verts, mesh->numverts * sizeof(float[4]));
1069                                 memcpy(varray_texcoord[0], mesh->str, mesh->numverts * sizeof(float[4]));
1070                                 memcpy(varray_texcoord[1], mesh->uvw, mesh->numverts * sizeof(float[4]));
1071                                 R_Mesh_Draw(mesh->numverts, mesh->numtriangles, mesh->index);
1072                         }
1073                 }
1074         }
1075 }
1076
1077 static void RSurfShader_OpaqueWall_Pass_BaseTexture(const entity_render_t *ent, const texture_t *texture, const msurface_t *firstsurf)
1078 {
1079         const msurface_t *surf;
1080         const surfmesh_t *mesh;
1081         rmeshstate_t m;
1082         memset(&m, 0, sizeof(m));
1083         m.blendfunc1 = GL_ONE;
1084         m.blendfunc2 = GL_ZERO;
1085         m.tex[0] = R_GetTexture(texture->texture);
1086         R_Mesh_State(&m);
1087         GL_Color(1, 1, 1, 1);
1088         for (surf = firstsurf;surf;surf = surf->texturechain)
1089         {
1090                 if (surf->visframe == r_framecount)
1091                 {
1092                         for (mesh = surf->mesh;mesh;mesh = mesh->chain)
1093                         {
1094                                 R_Mesh_ResizeCheck(mesh->numverts);
1095                                 memcpy(varray_vertex, mesh->verts, mesh->numverts * sizeof(float[4]));
1096                                 memcpy(varray_texcoord[0], mesh->str, mesh->numverts * sizeof(float[4]));
1097                                 R_Mesh_Draw(mesh->numverts, mesh->numtriangles, mesh->index);
1098                         }
1099                 }
1100         }
1101 }
1102
1103 static void RSurfShader_OpaqueWall_Pass_BaseLightmap(const entity_render_t *ent, const texture_t *texture, const msurface_t *firstsurf)
1104 {
1105         const msurface_t *surf;
1106         const surfmesh_t *mesh;
1107         rmeshstate_t m;
1108         int lightmaptexturenum;
1109         memset(&m, 0, sizeof(m));
1110         m.blendfunc1 = GL_ZERO;
1111         m.blendfunc2 = GL_SRC_COLOR;
1112         m.tex[0] = R_GetTexture(firstsurf->lightmaptexture);
1113         if (gl_combine.integer)
1114                 m.texrgbscale[0] = 4;
1115         R_Mesh_State(&m);
1116         GL_Color(r_colorscale, r_colorscale, r_colorscale, 1);
1117         for (surf = firstsurf;surf;surf = surf->texturechain)
1118         {
1119                 if (surf->visframe == r_framecount)
1120                 {
1121                         lightmaptexturenum = R_GetTexture(surf->lightmaptexture);
1122                         if (m.tex[0] != lightmaptexturenum)
1123                         {
1124                                 m.tex[0] = lightmaptexturenum;
1125                                 R_Mesh_State(&m);
1126                         }
1127                         for (mesh = surf->mesh;mesh;mesh = mesh->chain)
1128                         {
1129                                 R_Mesh_ResizeCheck(mesh->numverts);
1130                                 memcpy(varray_vertex, mesh->verts, mesh->numverts * sizeof(float[4]));
1131                                 memcpy(varray_texcoord[0], mesh->uvw, mesh->numverts * sizeof(float[4]));
1132                                 R_Mesh_Draw(mesh->numverts, mesh->numtriangles, mesh->index);
1133                         }
1134                 }
1135         }
1136 }
1137
1138 static void RSurfShader_OpaqueWall_Pass_Light(const entity_render_t *ent, const texture_t *texture, const msurface_t *firstsurf)
1139 {
1140         const msurface_t *surf;
1141         const surfmesh_t *mesh;
1142         float colorscale;
1143         rmeshstate_t m;
1144
1145         memset(&m, 0, sizeof(m));
1146         m.blendfunc1 = GL_SRC_ALPHA;
1147         m.blendfunc2 = GL_ONE;
1148         m.tex[0] = R_GetTexture(texture->texture);
1149         colorscale = r_colorscale;
1150         if (gl_combine.integer)
1151         {
1152                 m.texrgbscale[0] = 4;
1153                 colorscale *= 0.25f;
1154         }
1155         R_Mesh_State(&m);
1156         GL_UseColorArray();
1157         for (surf = firstsurf;surf;surf = surf->texturechain)
1158         {
1159                 if (surf->visframe == r_framecount && surf->dlightframe == r_framecount)
1160                 {
1161                         for (mesh = surf->mesh;mesh;mesh = mesh->chain)
1162                         {
1163                                 if (RSurf_LightCheck(&ent->inversematrix, surf->dlightbits, mesh))
1164                                 {
1165                                         R_Mesh_ResizeCheck(mesh->numverts);
1166                                         memcpy(varray_vertex, mesh->verts, mesh->numverts * sizeof(float[4]));
1167                                         memcpy(varray_texcoord[0], mesh->str, mesh->numverts * sizeof(float[4]));
1168                                         R_FillColors(varray_color, mesh->numverts, 0, 0, 0, 1);
1169                                         RSurf_LightSeparate(&ent->inversematrix, surf->dlightbits, mesh->numverts, varray_vertex, varray_color);
1170                                         RSurf_ScaleColors(varray_color, colorscale, mesh->numverts);
1171                                         R_Mesh_Draw(mesh->numverts, mesh->numtriangles, mesh->index);
1172                                 }
1173                         }
1174                 }
1175         }
1176 }
1177
1178 static void RSurfShader_OpaqueWall_Pass_Fog(const entity_render_t *ent, const texture_t *texture, const msurface_t *firstsurf)
1179 {
1180         const msurface_t *surf;
1181         const surfmesh_t *mesh;
1182         rmeshstate_t m;
1183         float modelorg[3];
1184         Matrix4x4_Transform(&ent->inversematrix, r_origin, modelorg);
1185         memset(&m, 0, sizeof(m));
1186         m.blendfunc1 = GL_SRC_ALPHA;
1187         m.blendfunc2 = GL_ONE_MINUS_SRC_ALPHA;
1188         R_Mesh_State(&m);
1189         GL_UseColorArray();
1190         for (surf = firstsurf;surf;surf = surf->texturechain)
1191         {
1192                 if (surf->visframe == r_framecount)
1193                 {
1194                         for (mesh = surf->mesh;mesh;mesh = mesh->chain)
1195                         {
1196                                 R_Mesh_ResizeCheck(mesh->numverts);
1197                                 memcpy(varray_vertex, mesh->verts, mesh->numverts * sizeof(float[4]));
1198                                 if (m.tex[0])
1199                                         memcpy(varray_texcoord[0], mesh->str, mesh->numverts * sizeof(float[4]));
1200                                 RSurf_FogPassColors(varray_vertex, varray_color, fogcolor[0], fogcolor[1], fogcolor[2], 1, r_colorscale, mesh->numverts, modelorg);
1201                                 R_Mesh_Draw(mesh->numverts, mesh->numtriangles, mesh->index);
1202                         }
1203                 }
1204         }
1205 }
1206
1207 static void RSurfShader_OpaqueWall_Pass_BaseDetail(const entity_render_t *ent, const texture_t *texture, const msurface_t *firstsurf)
1208 {
1209         const msurface_t *surf;
1210         const surfmesh_t *mesh;
1211         rmeshstate_t m;
1212         memset(&m, 0, sizeof(m));
1213         m.blendfunc1 = GL_DST_COLOR;
1214         m.blendfunc2 = GL_SRC_COLOR;
1215         m.tex[0] = R_GetTexture(texture->detailtexture);
1216         R_Mesh_State(&m);
1217         GL_Color(1, 1, 1, 1);
1218         for (surf = firstsurf;surf;surf = surf->texturechain)
1219         {
1220                 if (surf->visframe == r_framecount)
1221                 {
1222                         for (mesh = surf->mesh;mesh;mesh = mesh->chain)
1223                         {
1224                                 R_Mesh_ResizeCheck(mesh->numverts);
1225                                 memcpy(varray_vertex, mesh->verts, mesh->numverts * sizeof(float[4]));
1226                                 memcpy(varray_texcoord[0], mesh->abc, mesh->numverts * sizeof(float[4]));
1227                                 R_Mesh_Draw(mesh->numverts, mesh->numtriangles, mesh->index);
1228                         }
1229                 }
1230         }
1231 }
1232
1233 static void RSurfShader_OpaqueWall_Pass_Glow(const entity_render_t *ent, const texture_t *texture, const msurface_t *firstsurf)
1234 {
1235         const msurface_t *surf;
1236         const surfmesh_t *mesh;
1237         rmeshstate_t m;
1238         memset(&m, 0, sizeof(m));
1239         m.blendfunc1 = GL_SRC_ALPHA;
1240         m.blendfunc2 = GL_ONE;
1241         m.tex[0] = R_GetTexture(texture->glowtexture);
1242         R_Mesh_State(&m);
1243         GL_Color(r_colorscale, r_colorscale, r_colorscale, 1);
1244         for (surf = firstsurf;surf;surf = surf->texturechain)
1245         {
1246                 if (surf->visframe == r_framecount)
1247                 {
1248                         for (mesh = surf->mesh;mesh;mesh = mesh->chain)
1249                         {
1250                                 R_Mesh_ResizeCheck(mesh->numverts);
1251                                 memcpy(varray_vertex, mesh->verts, mesh->numverts * sizeof(float[4]));
1252                                 memcpy(varray_texcoord[0], mesh->str, mesh->numverts * sizeof(float[4]));
1253                                 R_Mesh_Draw(mesh->numverts, mesh->numtriangles, mesh->index);
1254                         }
1255                 }
1256         }
1257 }
1258
1259 static void RSurfShader_OpaqueWall_Pass_OpaqueGlow(const entity_render_t *ent, const texture_t *texture, const msurface_t *firstsurf)
1260 {
1261         const msurface_t *surf;
1262         const surfmesh_t *mesh;
1263         rmeshstate_t m;
1264         memset(&m, 0, sizeof(m));
1265         m.blendfunc1 = GL_SRC_ALPHA;
1266         m.blendfunc2 = GL_ZERO;
1267         m.tex[0] = R_GetTexture(texture->glowtexture);
1268         R_Mesh_State(&m);
1269         if (m.tex[0])
1270                 GL_Color(r_colorscale, r_colorscale, r_colorscale, 1);
1271         else
1272                 GL_Color(0, 0, 0, 1);
1273         for (surf = firstsurf;surf;surf = surf->texturechain)
1274         {
1275                 if (surf->visframe == r_framecount)
1276                 {
1277                         for (mesh = surf->mesh;mesh;mesh = mesh->chain)
1278                         {
1279                                 R_Mesh_ResizeCheck(mesh->numverts);
1280                                 memcpy(varray_vertex, mesh->verts, mesh->numverts * sizeof(float[4]));
1281                                 memcpy(varray_texcoord[0], mesh->str, mesh->numverts * sizeof(float[4]));
1282                                 R_Mesh_Draw(mesh->numverts, mesh->numtriangles, mesh->index);
1283                         }
1284                 }
1285         }
1286 }
1287
1288 static void RSurfShader_Wall_Vertex_Callback(const void *calldata1, int calldata2)
1289 {
1290         const entity_render_t *ent = calldata1;
1291         const msurface_t *surf = ent->model->surfaces + calldata2;
1292         int rendertype;
1293         float currentalpha;
1294         texture_t *texture;
1295         R_Mesh_Matrix(&ent->matrix);
1296
1297         texture = surf->texinfo->texture;
1298         if (texture->animated)
1299                 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];
1300
1301         currentalpha = ent->alpha;
1302         if (texture->flags & SURF_WATERALPHA)
1303                 currentalpha *= r_wateralpha.value;
1304         if (ent->effects & EF_ADDITIVE)
1305                 rendertype = SURFRENDER_ADD;
1306         else if (currentalpha < 1 || texture->fogtexture != NULL)
1307                 rendertype = SURFRENDER_ALPHA;
1308         else
1309                 rendertype = SURFRENDER_OPAQUE;
1310
1311         RSurfShader_Wall_Pass_BaseVertex(ent, surf, texture, rendertype, currentalpha);
1312         if (texture->glowtexture)
1313                 RSurfShader_Wall_Pass_Glow(ent, surf, texture, rendertype, currentalpha);
1314         if (fogenabled)
1315                 RSurfShader_Wall_Pass_Fog(ent, surf, texture, rendertype, currentalpha);
1316 }
1317
1318 static void RSurfShader_Wall_Lightmap(const entity_render_t *ent, const texture_t *texture, const msurface_t *firstsurf)
1319 {
1320         const msurface_t *surf;
1321         vec3_t center;
1322         if (texture->rendertype != SURFRENDER_OPAQUE)
1323         {
1324                 // transparent vertex shaded from lightmap
1325                 for (surf = firstsurf;surf;surf = surf->texturechain)
1326                 {
1327                         if (surf->visframe == r_framecount)
1328                         {
1329                                 Matrix4x4_Transform(&ent->matrix, surf->poly_center, center);
1330                                 R_MeshQueue_AddTransparent(center, RSurfShader_Wall_Vertex_Callback, ent, surf - ent->model->surfaces);
1331                         }
1332                 }
1333         }
1334         else if (r_shadow_lightingmode >= 2)
1335         {
1336                 // opaque base lighting
1337                 RSurfShader_OpaqueWall_Pass_OpaqueGlow(ent, texture, firstsurf);
1338                 if (fogenabled)
1339                         RSurfShader_OpaqueWall_Pass_Fog(ent, texture, firstsurf);
1340         }
1341         else if (r_vertexsurfaces.integer)
1342         {
1343                 // opaque vertex shaded from lightmap
1344                 for (surf = firstsurf;surf;surf = surf->texturechain)
1345                         if (surf->visframe == r_framecount)
1346                                 RSurfShader_Wall_Pass_BaseVertex(ent, surf, texture, texture->rendertype, texture->currentalpha);
1347                 if (texture->glowtexture)
1348                         for (surf = firstsurf;surf;surf = surf->texturechain)
1349                                 if (surf->visframe == r_framecount)
1350                                         RSurfShader_Wall_Pass_Glow(ent, surf, texture, texture->rendertype, texture->currentalpha);
1351                 if (fogenabled)
1352                         for (surf = firstsurf;surf;surf = surf->texturechain)
1353                                 if (surf->visframe == r_framecount)
1354                                         RSurfShader_Wall_Pass_Fog(ent, surf, texture, texture->rendertype, texture->currentalpha);
1355         }
1356         else
1357         {
1358                 // opaque lightmapped
1359                 if (r_textureunits.integer >= 2)
1360                 {
1361                         if (r_textureunits.integer >= 3 && gl_combine.integer && r_detailtextures.integer)
1362                                 RSurfShader_OpaqueWall_Pass_BaseTripleTexCombine(ent, texture, firstsurf);
1363                         else
1364                         {
1365                                 RSurfShader_OpaqueWall_Pass_BaseDoubleTex(ent, texture, firstsurf);
1366                                 if (r_detailtextures.integer)
1367                                         RSurfShader_OpaqueWall_Pass_BaseDetail(ent, texture, firstsurf);
1368                         }
1369                 }
1370                 else
1371                 {
1372                         RSurfShader_OpaqueWall_Pass_BaseTexture(ent, texture, firstsurf);
1373                         RSurfShader_OpaqueWall_Pass_BaseLightmap(ent, texture, firstsurf);
1374                         if (r_detailtextures.integer)
1375                                 RSurfShader_OpaqueWall_Pass_BaseDetail(ent, texture, firstsurf);
1376                 }
1377                 if (!r_dlightmap.integer && !(ent->effects & EF_FULLBRIGHT))
1378                         RSurfShader_OpaqueWall_Pass_Light(ent, texture, firstsurf);
1379                 if (texture->glowtexture)
1380                         RSurfShader_OpaqueWall_Pass_Glow(ent, texture, firstsurf);
1381                 if (fogenabled)
1382                         RSurfShader_OpaqueWall_Pass_Fog(ent, texture, firstsurf);
1383         }
1384 }
1385
1386 Cshader_t Cshader_wall_lightmap = {{NULL, RSurfShader_Wall_Lightmap}, SHADERFLAGS_NEEDLIGHTMAP};
1387 Cshader_t Cshader_water = {{NULL, RSurfShader_Water}, 0};
1388 Cshader_t Cshader_sky = {{RSurfShader_Sky, NULL}, 0};
1389
1390 int Cshader_count = 3;
1391 Cshader_t *Cshaders[3] =
1392 {
1393         &Cshader_wall_lightmap,
1394         &Cshader_water,
1395         &Cshader_sky
1396 };
1397
1398 void R_UpdateTextureInfo(entity_render_t *ent)
1399 {
1400         int i, texframe, alttextures;
1401         texture_t *t;
1402
1403         if (!ent->model)
1404                 return;
1405
1406         alttextures = ent->frame != 0;
1407         texframe = (int)(cl.time * 5.0f);
1408         for (i = 0;i < ent->model->numtextures;i++)
1409         {
1410                 t = ent->model->textures + i;
1411                 t->currentalpha = ent->alpha;
1412                 if (t->flags & SURF_WATERALPHA)
1413                         t->currentalpha *= r_wateralpha.value;
1414                 if (ent->effects & EF_ADDITIVE)
1415                         t->rendertype = SURFRENDER_ADD;
1416                 else if (t->currentalpha < 1 || t->fogtexture != NULL)
1417                         t->rendertype = SURFRENDER_ALPHA;
1418                 else
1419                         t->rendertype = SURFRENDER_OPAQUE;
1420                 // we don't need to set currentframe if t->animated is false because
1421                 // it was already set up by the texture loader for non-animating
1422                 if (t->animated)
1423                         t->currentframe = t->anim_frames[alttextures][(t->anim_total[alttextures] >= 2) ? (texframe % t->anim_total[alttextures]) : 0];
1424         }
1425 }
1426
1427 void R_PrepareSurfaces(entity_render_t *ent)
1428 {
1429         int i, numsurfaces, *surfacevisframes;
1430         model_t *model;
1431         msurface_t *surf, *surfaces;
1432         vec3_t modelorg;
1433
1434         if (!ent->model)
1435                 return;
1436
1437         model = ent->model;
1438         Matrix4x4_Transform(&ent->inversematrix, r_origin, modelorg);
1439         numsurfaces = model->nummodelsurfaces;
1440         surfaces = model->surfaces + model->firstmodelsurface;
1441         surfacevisframes = model->surfacevisframes + model->firstmodelsurface;
1442
1443         R_UpdateTextureInfo(ent);
1444
1445         if (r_dynamic.integer && r_shadow_lightingmode < 1)
1446                 R_MarkLights(ent);
1447
1448         for (i = 0, surf = surfaces;i < numsurfaces;i++, surf++)
1449         {
1450                 if (surfacevisframes[i] == r_framecount)
1451                 {
1452 #if !WORLDNODECULLBACKFACES
1453                         // mark any backface surfaces as not visible
1454                         if (PlaneDist(modelorg, surf->plane) < surf->plane->dist)
1455                         {
1456                                 if (!(surf->flags & SURF_PLANEBACK))
1457                                         surfacevisframes[i] = -1;
1458                         }
1459                         else
1460                         {
1461                                 if ((surf->flags & SURF_PLANEBACK))
1462                                         surfacevisframes[i] = -1;
1463                         }
1464                         if (surfacevisframes[i] == r_framecount)
1465 #endif
1466                         {
1467                                 c_faces++;
1468                                 surf->visframe = r_framecount;
1469                                 if (!r_vertexsurfaces.integer && surf->lightmaptexture != NULL)
1470                                 {
1471                                         if (surf->cached_dlight
1472                                          || surf->cached_ambient != r_ambient.value
1473                                          || surf->cached_lightmapscalebit != r_lightmapscalebit)
1474                                                 R_BuildLightMap(ent, surf, false); // base lighting changed
1475                                         else if (r_dynamic.integer)
1476                                         {
1477                                                 if  (surf->styles[0] != 255 && (d_lightstylevalue[surf->styles[0]] != surf->cached_light[0]
1478                                                  || (surf->styles[1] != 255 && (d_lightstylevalue[surf->styles[1]] != surf->cached_light[1]
1479                                                  || (surf->styles[2] != 255 && (d_lightstylevalue[surf->styles[2]] != surf->cached_light[2]
1480                                                  || (surf->styles[3] != 255 && (d_lightstylevalue[surf->styles[3]] != surf->cached_light[3]))))))))
1481                                                         R_BuildLightMap(ent, surf, false); // base lighting changed
1482                                                 else if (surf->dlightframe == r_framecount && r_dlightmap.integer)
1483                                                         R_BuildLightMap(ent, surf, true); // only dlights
1484                                         }
1485                                 }
1486                         }
1487                 }
1488         }
1489 }
1490
1491 void R_DrawSurfaces(entity_render_t *ent, int type)
1492 {
1493         int i;
1494         texture_t *t;
1495         R_Mesh_Matrix(&ent->matrix);
1496         for (i = 0, t = ent->model->textures;i < ent->model->numtextures;i++, t++)
1497                 if (t->shader->shaderfunc[type] && ent->model->texturesurfacechains[i])
1498                         t->shader->shaderfunc[type](ent, t->currentframe, ent->model->texturesurfacechains[i]);
1499 }
1500
1501 static void R_DrawPortal_Callback(const void *calldata1, int calldata2)
1502 {
1503         int i;
1504         float *v;
1505         rmeshstate_t m;
1506         const entity_render_t *ent = calldata1;
1507         const mportal_t *portal = ent->model->portals + calldata2;
1508         memset(&m, 0, sizeof(m));
1509         m.blendfunc1 = GL_SRC_ALPHA;
1510         m.blendfunc2 = GL_ONE_MINUS_SRC_ALPHA;
1511         R_Mesh_Matrix(&ent->matrix);
1512         R_Mesh_State(&m);
1513         R_Mesh_ResizeCheck(portal->numpoints);
1514         i = portal - ent->model->portals;
1515         GL_Color(((i & 0x0007) >> 0) * (1.0f / 7.0f) * r_colorscale,
1516                          ((i & 0x0038) >> 3) * (1.0f / 7.0f) * r_colorscale,
1517                          ((i & 0x01C0) >> 6) * (1.0f / 7.0f) * r_colorscale,
1518                          0.125f);
1519         if (PlaneDiff(r_origin, (&portal->plane)) > 0)
1520         {
1521                 for (i = portal->numpoints - 1, v = varray_vertex;i >= 0;i--, v += 4)
1522                         VectorCopy(portal->points[i].position, v);
1523         }
1524         else
1525                 for (i = 0, v = varray_vertex;i < portal->numpoints;i++, v += 4)
1526                         VectorCopy(portal->points[i].position, v);
1527         R_Mesh_Draw(portal->numpoints, portal->numpoints - 2, polygonelements);
1528 }
1529
1530 static void R_DrawPortals(entity_render_t *ent)
1531 {
1532         int i;
1533         mportal_t *portal, *endportal;
1534         float temp[3], center[3], f;
1535
1536         if (r_drawportals.integer < 1)
1537                 return;
1538
1539         for (portal = ent->model->portals, endportal = portal + ent->model->numportals;portal < endportal;portal++)
1540         {
1541                 if (portal->here->pvsframe == ent->model->pvsframecount || portal->past->pvsframe == ent->model->pvsframecount)
1542                 {
1543                         if (portal->numpoints <= POLYGONELEMENTS_MAXPOINTS)
1544                         {
1545                                 VectorClear(temp);
1546                                 for (i = 0;i < portal->numpoints;i++)
1547                                         VectorAdd(temp, portal->points[i].position, temp);
1548                                 f = ixtable[portal->numpoints];
1549                                 VectorScale(temp, f, temp);
1550                                 Matrix4x4_Transform(&ent->matrix, temp, center);
1551                                 R_MeshQueue_AddTransparent(center, R_DrawPortal_Callback, ent, portal - ent->model->portals);
1552                         }
1553                 }
1554         }
1555 }
1556
1557 void R_PrepareBrushModel(entity_render_t *ent)
1558 {
1559         int i, numsurfaces, *surfacevisframes, *surfacepvsframes;
1560         msurface_t *surf;
1561         model_t *model;
1562 #if WORLDNODECULLBACKFACES
1563         vec3_t modelorg;
1564 #endif
1565
1566         // because bmodels can be reused, we have to decide which things to render
1567         // from scratch every time
1568         model = ent->model;
1569 #if WORLDNODECULLBACKFACES
1570         Matrix4x4_Transform(&ent->inversematrix, r_origin, modelorg);
1571 #endif
1572         numsurfaces = model->nummodelsurfaces;
1573         surf = model->surfaces + model->firstmodelsurface;
1574         surfacevisframes = model->surfacevisframes + model->firstmodelsurface;
1575         surfacepvsframes = model->surfacepvsframes + model->firstmodelsurface;
1576         for (i = 0;i < numsurfaces;i++, surf++)
1577         {
1578 #if WORLDNODECULLBACKFACES
1579                 // mark any backface surfaces as not visible
1580                 if (PlaneDist(modelorg, surf->plane) < surf->plane->dist)
1581                 {
1582                         if ((surf->flags & SURF_PLANEBACK))
1583                         {
1584                                 surfacevisframes[i] = r_framecount;
1585                                 surfacepvsframes[i] = model->pvsframecount;
1586                         }
1587                 }
1588                 else
1589                 {
1590                         if (!(surf->flags & SURF_PLANEBACK))
1591                         {
1592                                 surfacevisframes[i] = r_framecount;
1593                                 surfacepvsframes[i] = model->pvsframecount;
1594                         }
1595                 }
1596 #else
1597                 surfacevisframes[i] = r_framecount;
1598                 surfacepvsframes[i] = model->pvsframecount;
1599 #endif
1600                 surf->dlightframe = -1;
1601         }
1602         R_PrepareSurfaces(ent);
1603 }
1604
1605 void R_SurfaceWorldNode (entity_render_t *ent)
1606 {
1607         int i, *surfacevisframes, *surfacepvsframes, surfnum;
1608         msurface_t *surf;
1609         mleaf_t *leaf;
1610         model_t *model;
1611         vec3_t modelorg;
1612
1613         model = ent->model;
1614         surfacevisframes = model->surfacevisframes + model->firstmodelsurface;
1615         surfacepvsframes = model->surfacepvsframes + model->firstmodelsurface;
1616         Matrix4x4_Transform(&ent->inversematrix, r_origin, modelorg);
1617
1618         for (leaf = model->pvsleafchain;leaf;leaf = leaf->pvschain)
1619         {
1620                 if (!R_CullBox (leaf->mins, leaf->maxs))
1621                 {
1622                         c_leafs++;
1623                         leaf->visframe = r_framecount;
1624                 }
1625         }
1626
1627         for (i = 0;i < model->pvssurflistlength;i++)
1628         {
1629                 surfnum = model->pvssurflist[i];
1630                 surf = model->surfaces + surfnum;
1631 #if WORLDNODECULLBACKFACES
1632                 if (PlaneDist(modelorg, surf->plane) < surf->plane->dist)
1633                 {
1634                         if ((surf->flags & SURF_PLANEBACK) && !R_CullBox (surf->poly_mins, surf->poly_maxs))
1635                                 surfacevisframes[surfnum] = r_framecount;
1636                 }
1637                 else
1638                 {
1639                         if (!(surf->flags & SURF_PLANEBACK) && !R_CullBox (surf->poly_mins, surf->poly_maxs))
1640                                 surfacevisframes[surfnum] = r_framecount;
1641                 }
1642 #else
1643                 if (!R_CullBox (surf->poly_mins, surf->poly_maxs))
1644                         surfacevisframes[surfnum] = r_framecount;
1645 #endif
1646         }
1647 }
1648
1649 static void R_PortalWorldNode(entity_render_t *ent, mleaf_t *viewleaf)
1650 {
1651         int c, leafstackpos, *mark, *surfacevisframes;
1652 #if WORLDNODECULLBACKFACES
1653         int n;
1654         msurface_t *surf;
1655 #endif
1656         mleaf_t *leaf, *leafstack[8192];
1657         mportal_t *p;
1658         vec3_t modelorg;
1659         msurface_t *surfaces;
1660         // LordHavoc: portal-passage worldnode with PVS;
1661         // follows portals leading outward from viewleaf, does not venture
1662         // offscreen or into leafs that are not visible, faster than Quake's
1663         // RecursiveWorldNode
1664         surfaces = ent->model->surfaces;
1665         surfacevisframes = ent->model->surfacevisframes;
1666         Matrix4x4_Transform(&ent->inversematrix, r_origin, modelorg);
1667         viewleaf->worldnodeframe = r_framecount;
1668         leafstack[0] = viewleaf;
1669         leafstackpos = 1;
1670         while (leafstackpos)
1671         {
1672                 c_leafs++;
1673                 leaf = leafstack[--leafstackpos];
1674                 leaf->visframe = r_framecount;
1675                 // draw any surfaces bounding this leaf
1676                 if (leaf->nummarksurfaces)
1677                 {
1678                         for (c = leaf->nummarksurfaces, mark = leaf->firstmarksurface;c;c--)
1679                         {
1680 #if WORLDNODECULLBACKFACES
1681                                 n = *mark++;
1682                                 if (surfacevisframes[n] != r_framecount)
1683                                 {
1684                                         surf = surfaces + n;
1685                                         if (PlaneDist(modelorg, surf->plane) < surf->plane->dist)
1686                                         {
1687                                                 if ((surf->flags & SURF_PLANEBACK))
1688                                                         surfacevisframes[n] = r_framecount;
1689                                         }
1690                                         else
1691                                         {
1692                                                 if (!(surf->flags & SURF_PLANEBACK))
1693                                                         surfacevisframes[n] = r_framecount;
1694                                         }
1695                                 }
1696 #else
1697                                 surfacevisframes[*mark++] = r_framecount;
1698 #endif
1699                         }
1700                 }
1701                 // follow portals into other leafs
1702                 for (p = leaf->portals;p;p = p->next)
1703                 {
1704                         // LordHavoc: this DotProduct hurts less than a cache miss
1705                         // (which is more likely to happen if backflowing through leafs)
1706                         if (DotProduct(modelorg, p->plane.normal) < (p->plane.dist + 1))
1707                         {
1708                                 leaf = p->past;
1709                                 if (leaf->worldnodeframe != r_framecount)
1710                                 {
1711                                         leaf->worldnodeframe = r_framecount;
1712                                         // FIXME: R_CullBox is absolute, should be done relative
1713                                         if (leaf->pvsframe == ent->model->pvsframecount && !R_CullBox(leaf->mins, leaf->maxs))
1714                                                 leafstack[leafstackpos++] = leaf;
1715                                 }
1716                         }
1717                 }
1718         }
1719         if (r_drawportals.integer)
1720                 R_DrawPortals(ent);
1721 }
1722
1723 void R_PVSUpdate (entity_render_t *ent, mleaf_t *viewleaf)
1724 {
1725         int i, j, l, c, bits, *surfacepvsframes, *mark;
1726         mleaf_t *leaf;
1727         qbyte *vis;
1728         model_t *model;
1729
1730         model = ent->model;
1731         if (model && (model->pvsviewleaf != viewleaf || model->pvsviewleafnovis != r_novis.integer))
1732         {
1733                 model->pvsframecount++;
1734                 model->pvsviewleaf = viewleaf;
1735                 model->pvsviewleafnovis = r_novis.integer;
1736                 model->pvsleafchain = NULL;
1737                 model->pvssurflistlength = 0;
1738                 if (viewleaf)
1739                 {
1740                         surfacepvsframes = model->surfacepvsframes;
1741                         vis = Mod_LeafPVS (viewleaf, model);
1742                         for (j = 0;j < model->numleafs;j += 8)
1743                         {
1744                                 bits = *vis++;
1745                                 if (bits)
1746                                 {
1747                                         l = model->numleafs - j;
1748                                         if (l > 8)
1749                                                 l = 8;
1750                                         for (i = 0;i < l;i++)
1751                                         {
1752                                                 if (bits & (1 << i))
1753                                                 {
1754                                                         leaf = &model->leafs[j + i + 1];
1755                                                         leaf->pvschain = model->pvsleafchain;
1756                                                         model->pvsleafchain = leaf;
1757                                                         leaf->pvsframe = model->pvsframecount;
1758                                                         // mark surfaces bounding this leaf as visible
1759                                                         for (c = leaf->nummarksurfaces, mark = leaf->firstmarksurface;c;c--, mark++)
1760                                                         {
1761                                                                 //if (surfacepvsframes[*mark] != model->pvsframecount)
1762                                                                 //{
1763                                                                         surfacepvsframes[*mark] = model->pvsframecount;
1764                                                                 //      model->pvssurflist[model->pvssurflistlength++] = *mark;
1765                                                                 //}
1766                                                         }
1767                                                 }
1768                                         }
1769                                 }
1770                         }
1771                         for (i = 0, j = model->firstmodelsurface;i < model->nummodelsurfaces;i++, j++)
1772                                 if (model->surfacepvsframes[j] == model->pvsframecount)
1773                                         model->pvssurflist[model->pvssurflistlength++] = j;
1774                 }
1775         }
1776 }
1777
1778 void R_WorldVisibility (entity_render_t *ent)
1779 {
1780         vec3_t modelorg;
1781         mleaf_t *viewleaf;
1782
1783         Matrix4x4_Transform(&ent->inversematrix, r_origin, modelorg);
1784         viewleaf = Mod_PointInLeaf (modelorg, ent->model);
1785         R_PVSUpdate(ent, viewleaf);
1786
1787         if (!viewleaf)
1788                 return;
1789
1790         if (r_surfaceworldnode.integer || viewleaf->contents == CONTENTS_SOLID)
1791                 R_SurfaceWorldNode (ent);
1792         else
1793                 R_PortalWorldNode (ent, viewleaf);
1794 }
1795
1796 void R_DrawWorld (entity_render_t *ent)
1797 {
1798         R_PrepareSurfaces(ent);
1799         R_DrawSurfaces(ent, SHADERSTAGE_SKY);
1800         R_DrawSurfaces(ent, SHADERSTAGE_NORMAL);
1801 }
1802
1803 void R_Model_Brush_DrawSky (entity_render_t *ent)
1804 {
1805         if (ent != &cl_entities[0].render)
1806                 R_PrepareBrushModel(ent);
1807         R_DrawSurfaces(ent, SHADERSTAGE_SKY);
1808 }
1809
1810 void R_Model_Brush_Draw (entity_render_t *ent)
1811 {
1812         c_bmodels++;
1813         if (ent != &cl_entities[0].render)
1814                 R_PrepareBrushModel(ent);
1815         R_DrawSurfaces(ent, SHADERSTAGE_NORMAL);
1816 }
1817
1818 void R_Model_Brush_DrawShadowVolume (entity_render_t *ent, vec3_t relativelightorigin, float lightradius)
1819 {
1820         int i;
1821         msurface_t *surf;
1822         float projectdistance, f, temp[3], lightradius2;
1823         surfmesh_t *mesh;
1824         R_Mesh_Matrix(&ent->matrix);
1825         lightradius2 = lightradius * lightradius;
1826         R_UpdateTextureInfo(ent);
1827         projectdistance = 1000000000.0f;//lightradius + ent->model->radius;
1828         for (i = 0, surf = ent->model->surfaces + ent->model->firstmodelsurface;i < ent->model->nummodelsurfaces;i++, surf++)
1829         {
1830                 if (surf->texinfo->texture->rendertype == SURFRENDER_OPAQUE && surf->flags & SURF_SHADOWCAST)
1831                 {
1832                         f = PlaneDiff(relativelightorigin, surf->plane);
1833                         if (surf->flags & SURF_PLANEBACK)
1834                                 f = -f;
1835                         // draw shadows only for frontfaces and only if they are close
1836                         if (f >= 0.1 && f < lightradius)
1837                         {
1838                                 temp[0] = bound(surf->poly_mins[0], relativelightorigin[0], surf->poly_maxs[0]) - relativelightorigin[0];
1839                                 temp[1] = bound(surf->poly_mins[1], relativelightorigin[1], surf->poly_maxs[1]) - relativelightorigin[1];
1840                                 temp[2] = bound(surf->poly_mins[2], relativelightorigin[2], surf->poly_maxs[2]) - relativelightorigin[2];
1841                                 if (DotProduct(temp, temp) < lightradius2)
1842                                 {
1843                                         for (mesh = surf->mesh;mesh;mesh = mesh->chain)
1844                                         {
1845                                                 R_Mesh_ResizeCheck(mesh->numverts * 2);
1846                                                 memcpy(varray_vertex, mesh->verts, mesh->numverts * sizeof(float[4]));
1847                                                 R_Shadow_Volume(mesh->numverts, mesh->numtriangles, mesh->index, mesh->triangleneighbors, relativelightorigin, lightradius, projectdistance);
1848                                         }
1849                                 }
1850                         }
1851                 }
1852         }
1853 }
1854
1855 void R_Model_Brush_DrawLightForSurfaceList(entity_render_t *ent, vec3_t relativelightorigin, vec3_t relativeeyeorigin, float lightradius, float *lightcolor, msurface_t **surflist, int numsurfaces)
1856 {
1857         int surfnum;
1858         msurface_t *surf;
1859         texture_t *t;
1860         surfmesh_t *mesh;
1861         R_Mesh_Matrix(&ent->matrix);
1862         R_UpdateTextureInfo(ent);
1863         for (surfnum = 0;surfnum < numsurfaces;surfnum++)
1864         {
1865                 surf = surflist[surfnum];
1866                 if (surf->visframe == r_framecount)
1867                 {
1868                         t = surf->texinfo->texture->currentframe;
1869                         if (t->rendertype == SURFRENDER_OPAQUE && t->flags & SURF_SHADOWLIGHT)
1870                         {
1871                                 for (mesh = surf->mesh;mesh;mesh = mesh->chain)
1872                                 {
1873                                         R_Mesh_ResizeCheck(mesh->numverts);
1874                                         memcpy(varray_vertex, mesh->verts, mesh->numverts * sizeof(float[4]));
1875                                         R_Shadow_DiffuseLighting(mesh->numverts, mesh->numtriangles, mesh->index, mesh->svectors, mesh->tvectors, mesh->normals, mesh->str, relativelightorigin, lightradius, lightcolor, t->texture, t->nmaptexture, NULL);
1876                                         R_Shadow_SpecularLighting(mesh->numverts, mesh->numtriangles, mesh->index, mesh->svectors, mesh->tvectors, mesh->normals, mesh->str, relativelightorigin, relativeeyeorigin, lightradius, lightcolor, t->glosstexture, t->nmaptexture, NULL);
1877                                 }
1878                         }
1879                 }
1880         }
1881 }
1882
1883 void R_Model_Brush_DrawLight(entity_render_t *ent, vec3_t relativelightorigin, vec3_t relativeeyeorigin, float lightradius, float *lightcolor)
1884 {
1885         int surfnum;
1886         msurface_t *surf;
1887         texture_t *t;
1888         float f, lightradius2, temp[3];
1889         surfmesh_t *mesh;
1890         R_Mesh_Matrix(&ent->matrix);
1891         lightradius2 = lightradius * 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                         temp[0] = bound(surf->poly_mins[0], relativelightorigin[0], surf->poly_maxs[0]) - relativelightorigin[0];
1899                         temp[1] = bound(surf->poly_mins[1], relativelightorigin[1], surf->poly_maxs[1]) - relativelightorigin[1];
1900                         temp[2] = bound(surf->poly_mins[2], relativelightorigin[2], surf->poly_maxs[2]) - relativelightorigin[2];
1901                         if (DotProduct(temp, temp) < lightradius2)
1902                         {
1903                                 f = PlaneDiff(relativelightorigin, surf->plane);
1904                                 if (surf->flags & SURF_PLANEBACK)
1905                                         f = -f;
1906                                 if (f >= -0.1 && f < lightradius)
1907                                 {
1908                                         f = PlaneDiff(relativeeyeorigin, surf->plane);
1909                                         if (surf->flags & SURF_PLANEBACK)
1910                                                 f = -f;
1911                                         if (f > 0)
1912                                         {
1913                                                 t = surf->texinfo->texture->currentframe;
1914                                                 if (t->rendertype == SURFRENDER_OPAQUE && t->flags & SURF_SHADOWLIGHT)
1915                                                 {
1916                                                         for (mesh = surf->mesh;mesh;mesh = mesh->chain)
1917                                                         {
1918                                                                 R_Mesh_ResizeCheck(mesh->numverts);
1919                                                                 memcpy(varray_vertex, mesh->verts, mesh->numverts * sizeof(float[4]));
1920                                                                 R_Shadow_DiffuseLighting(mesh->numverts, mesh->numtriangles, mesh->index, mesh->svectors, mesh->tvectors, mesh->normals, mesh->str, relativelightorigin, lightradius, lightcolor, t->texture, t->nmaptexture, NULL);
1921                                                                 R_Shadow_SpecularLighting(mesh->numverts, mesh->numtriangles, mesh->index, mesh->svectors, mesh->tvectors, mesh->normals, mesh->str, relativelightorigin, relativeeyeorigin, lightradius, lightcolor, t->glosstexture, t->nmaptexture, NULL);
1922                                                         }
1923                                                 }
1924                                         }
1925                                 }
1926                         }
1927                 }
1928         }
1929         else
1930         {
1931                 // world, already culled to view, just cull to light
1932                 for (surfnum = 0, surf = ent->model->surfaces + ent->model->firstmodelsurface;surfnum < ent->model->nummodelsurfaces;surfnum++, surf++)
1933                 {
1934                         if (surf->visframe == r_framecount)
1935                         {
1936                                 temp[0] = bound(surf->poly_mins[0], relativelightorigin[0], surf->poly_maxs[0]) - relativelightorigin[0];
1937                                 temp[1] = bound(surf->poly_mins[1], relativelightorigin[1], surf->poly_maxs[1]) - relativelightorigin[1];
1938                                 temp[2] = bound(surf->poly_mins[2], relativelightorigin[2], surf->poly_maxs[2]) - relativelightorigin[2];
1939                                 if (DotProduct(temp, temp) < lightradius2)
1940                                 {
1941                                         f = PlaneDiff(relativelightorigin, surf->plane);
1942                                         if (surf->flags & SURF_PLANEBACK)
1943                                                 f = -f;
1944                                         if (f >= -0.1 && f < lightradius)
1945                                         {
1946                                                 t = surf->texinfo->texture->currentframe;
1947                                                 if (t->rendertype == SURFRENDER_OPAQUE && t->flags & SURF_SHADOWLIGHT)
1948                                                 {
1949                                                         for (mesh = surf->mesh;mesh;mesh = mesh->chain)
1950                                                         {
1951                                                                 R_Mesh_ResizeCheck(mesh->numverts);
1952                                                                 memcpy(varray_vertex, mesh->verts, mesh->numverts * sizeof(float[4]));
1953                                                                 R_Shadow_DiffuseLighting(mesh->numverts, mesh->numtriangles, mesh->index, mesh->svectors, mesh->tvectors, mesh->normals, mesh->str, relativelightorigin, lightradius, lightcolor, t->texture, t->nmaptexture, NULL);
1954                                                                 R_Shadow_SpecularLighting(mesh->numverts, mesh->numtriangles, mesh->index, mesh->svectors, mesh->tvectors, mesh->normals, mesh->str, relativelightorigin, relativeeyeorigin, lightradius, lightcolor, t->glosstexture, t->nmaptexture, NULL);
1955                                                         }
1956                                                 }
1957                                         }
1958                                 }
1959                         }
1960                 }
1961         }
1962 }
1963
1964 static void gl_surf_start(void)
1965 {
1966 }
1967
1968 static void gl_surf_shutdown(void)
1969 {
1970 }
1971
1972 static void gl_surf_newmap(void)
1973 {
1974 }
1975
1976 void GL_Surf_Init(void)
1977 {
1978         int i;
1979         dlightdivtable[0] = 4194304;
1980         for (i = 1;i < 32768;i++)
1981                 dlightdivtable[i] = 4194304 / (i << 7);
1982
1983         Cvar_RegisterVariable(&r_ambient);
1984         Cvar_RegisterVariable(&r_vertexsurfaces);
1985         Cvar_RegisterVariable(&r_dlightmap);
1986         Cvar_RegisterVariable(&r_drawportals);
1987         Cvar_RegisterVariable(&r_testvis);
1988         Cvar_RegisterVariable(&r_floatbuildlightmap);
1989         Cvar_RegisterVariable(&r_detailtextures);
1990         Cvar_RegisterVariable(&r_surfaceworldnode);
1991
1992         R_RegisterModule("GL_Surf", gl_surf_start, gl_surf_shutdown, gl_surf_newmap);
1993 }
1994