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, const vec3_t origin, float radius, const 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 (const 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, msurface_t **surfchain)
 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         while((surf = *surfchain++) != NULL)
 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, msurface_t **surfchain)
 882 {
 883         const msurface_t *surf;
 884         msurface_t **chain;
 885         vec3_t center;
 886         if (texture->rendertype != SURFRENDER_OPAQUE)
 887         {
 888                 for (chain = surfchain;(surf = *chain) != NULL;*chain++)
 889                 {
 890                         if (surf->visframe == r_framecount)
 891                         {
 892                                 Matrix4x4_Transform(&ent->matrix, surf->poly_center, center);
 893                                 R_MeshQueue_AddTransparent(center, RSurfShader_Water_Callback, ent, surf - ent->model->surfaces);
 894                         }
 895                 }
 896         }
 897         else
 898                 for (chain = surfchain;(surf = *chain) != NULL;*chain++)
 899                         if (surf->visframe == r_framecount)
 900                                 RSurfShader_Water_Callback(ent, surf - ent->model->surfaces);
 901 }
 902
 903 static void RSurfShader_Wall_Pass_BaseVertex(const entity_render_t *ent, const msurface_t *surf, const texture_t *texture, int rendertype, float currentalpha)
 904 {
 905         float base, colorscale;
 906         const surfmesh_t *mesh;
 907         rmeshstate_t m;
 908         float modelorg[3];
 909         Matrix4x4_Transform(&ent->inversematrix, r_origin, modelorg);
 910         memset(&m, 0, sizeof(m));
 911         if (rendertype == SURFRENDER_ADD)
 912         {
 913                 m.blendfunc1 = GL_SRC_ALPHA;
 914                 m.blendfunc2 = GL_ONE;
 915         }
 916         else if (rendertype == SURFRENDER_ALPHA)
 917         {
 918                 m.blendfunc1 = GL_SRC_ALPHA;
 919                 m.blendfunc2 = GL_ONE_MINUS_SRC_ALPHA;
 920         }
 921         else
 922         {
 923                 m.blendfunc1 = GL_ONE;
 924                 m.blendfunc2 = GL_ZERO;
 925         }
 926         m.tex[0] = R_GetTexture(texture->texture);
 927         colorscale = r_colorscale;
 928         if (gl_combine.integer)
 929         {
 930                 m.texrgbscale[0] = 4;
 931                 colorscale *= 0.25f;
 932         }
 933         base = ent->effects & EF_FULLBRIGHT ? 2.0f : r_ambient.value * (1.0f / 64.0f);
 934         R_Mesh_State(&m);
 935         GL_UseColorArray();
 936         for (mesh = surf->mesh;mesh;mesh = mesh->chain)
 937         {
 938                 R_Mesh_ResizeCheck(mesh->numverts);
 939                 memcpy(varray_vertex, mesh->verts, mesh->numverts * sizeof(float[4]));
 940                 memcpy(varray_texcoord[0], mesh->str, mesh->numverts * sizeof(float[4]));
 941                 R_FillColors(varray_color, mesh->numverts, base, base, base, currentalpha);
 942                 if (!(ent->effects & EF_FULLBRIGHT))
 943                 {
 944                         if (surf->dlightframe == r_framecount)
 945                                 RSurf_LightSeparate(&ent->inversematrix, surf->dlightbits, mesh->numverts, varray_vertex, varray_color);
 946                         if (surf->flags & SURF_LIGHTMAP)
 947                                 RSurf_AddLightmapToVertexColors(mesh->lightmapoffsets, varray_color, mesh->numverts, surf->samples, ((surf->extents[0]>>4)+1)*((surf->extents[1]>>4)+1)*3, surf->styles);
 948                 }
 949                 RSurf_FogColors(varray_vertex, varray_color, colorscale, mesh->numverts, modelorg);
 950                 R_Mesh_Draw(mesh->numverts, mesh->numtriangles, mesh->index);
 951         }
 952 }
 953
 954 static void RSurfShader_Wall_Pass_Glow(const entity_render_t *ent, const msurface_t *surf, const texture_t *texture, int rendertype, float currentalpha)
 955 {
 956         const surfmesh_t *mesh;
 957         rmeshstate_t m;
 958         float modelorg[3];
 959         Matrix4x4_Transform(&ent->inversematrix, r_origin, modelorg);
 960         memset(&m, 0, sizeof(m));
 961         m.blendfunc1 = GL_SRC_ALPHA;
 962         m.blendfunc2 = GL_ONE;
 963         m.tex[0] = R_GetTexture(texture->glowtexture);
 964         R_Mesh_State(&m);
 965         GL_UseColorArray();
 966         for (mesh = surf->mesh;mesh;mesh = mesh->chain)
 967         {
 968                 R_Mesh_ResizeCheck(mesh->numverts);
 969                 memcpy(varray_vertex, mesh->verts, mesh->numverts * sizeof(float[4]));
 970                 memcpy(varray_texcoord[0], mesh->str, mesh->numverts * sizeof(float[4]));
 971                 RSurf_FoggedColors(varray_vertex, varray_color, 1, 1, 1, currentalpha, r_colorscale, mesh->numverts, modelorg);
 972                 R_Mesh_Draw(mesh->numverts, mesh->numtriangles, mesh->index);
 973         }
 974 }
 975
 976 static void RSurfShader_Wall_Pass_Fog(const entity_render_t *ent, const msurface_t *surf, const texture_t *texture, int rendertype, float currentalpha)
 977 {
 978         const surfmesh_t *mesh;
 979         rmeshstate_t m;
 980         float modelorg[3];
 981         Matrix4x4_Transform(&ent->inversematrix, r_origin, modelorg);
 982         memset(&m, 0, sizeof(m));
 983         m.blendfunc1 = GL_SRC_ALPHA;
 984         m.blendfunc2 = GL_ONE;
 985         m.tex[0] = R_GetTexture(texture->fogtexture);
 986         R_Mesh_State(&m);
 987         GL_UseColorArray();
 988         for (mesh = surf->mesh;mesh;mesh = mesh->chain)
 989         {
 990                 R_Mesh_ResizeCheck(mesh->numverts);
 991                 memcpy(varray_vertex, mesh->verts, mesh->numverts * sizeof(float[4]));
 992                 if (m.tex[0])
 993                         memcpy(varray_texcoord[0], mesh->str, mesh->numverts * sizeof(float[4]));
 994                 RSurf_FogPassColors(varray_vertex, varray_color, fogcolor[0], fogcolor[1], fogcolor[2], currentalpha, r_colorscale, mesh->numverts, modelorg);
 995                 R_Mesh_Draw(mesh->numverts, mesh->numtriangles, mesh->index);
 996         }
 997 }
 998
 999 static void RSurfShader_OpaqueWall_Pass_BaseTripleTexCombine(const entity_render_t *ent, const texture_t *texture, msurface_t **surfchain)
1000 {
1001         const msurface_t *surf;
1002         const surfmesh_t *mesh;
1003         rmeshstate_t m;
1004         int lightmaptexturenum;
1005         float cl;
1006         memset(&m, 0, sizeof(m));
1007         m.blendfunc1 = GL_ONE;
1008         m.blendfunc2 = GL_ZERO;
1009         m.tex[0] = R_GetTexture(texture->texture);
1010         m.tex[1] = R_GetTexture((**surfchain).lightmaptexture);
1011         m.tex[2] = R_GetTexture(texture->detailtexture);
1012         m.texrgbscale[0] = 1;
1013         m.texrgbscale[1] = 4;
1014         m.texrgbscale[2] = 2;
1015         R_Mesh_State(&m);
1016         cl = (float) (1 << r_lightmapscalebit) * r_colorscale;
1017         GL_Color(cl, cl, cl, 1);
1018         while((surf = *surfchain++) != NULL)
1019         {
1020                 if (surf->visframe == r_framecount)
1021                 {
1022                         lightmaptexturenum = R_GetTexture(surf->lightmaptexture);
1023                         if (m.tex[1] != lightmaptexturenum)
1024                         {
1025                                 m.tex[1] = lightmaptexturenum;
1026                                 R_Mesh_State(&m);
1027                         }
1028                         for (mesh = surf->mesh;mesh;mesh = mesh->chain)
1029                         {
1030                                 R_Mesh_ResizeCheck(mesh->numverts);
1031                                 memcpy(varray_vertex, mesh->verts, mesh->numverts * sizeof(float[4]));
1032                                 memcpy(varray_texcoord[0], mesh->str, mesh->numverts * sizeof(float[4]));
1033                                 memcpy(varray_texcoord[1], mesh->uvw, mesh->numverts * sizeof(float[4]));
1034                                 memcpy(varray_texcoord[2], mesh->abc, mesh->numverts * sizeof(float[4]));
1035                                 R_Mesh_Draw(mesh->numverts, mesh->numtriangles, mesh->index);
1036                         }
1037                 }
1038         }
1039 }
1040
1041 static void RSurfShader_OpaqueWall_Pass_BaseDoubleTex(const entity_render_t *ent, const texture_t *texture, msurface_t **surfchain)
1042 {
1043         const msurface_t *surf;
1044         const surfmesh_t *mesh;
1045         rmeshstate_t m;
1046         int lightmaptexturenum;
1047         memset(&m, 0, sizeof(m));
1048         m.blendfunc1 = GL_ONE;
1049         m.blendfunc2 = GL_ZERO;
1050         m.tex[0] = R_GetTexture(texture->texture);
1051         m.tex[1] = R_GetTexture((**surfchain).lightmaptexture);
1052         if (gl_combine.integer)
1053                 m.texrgbscale[1] = 4;
1054         R_Mesh_State(&m);
1055         GL_Color(r_colorscale, r_colorscale, r_colorscale, 1);
1056         while((surf = *surfchain++) != NULL)
1057         {
1058                 if (surf->visframe == r_framecount)
1059                 {
1060                         lightmaptexturenum = R_GetTexture(surf->lightmaptexture);
1061                         if (m.tex[1] != lightmaptexturenum)
1062                         {
1063                                 m.tex[1] = lightmaptexturenum;
1064                                 R_Mesh_State(&m);
1065                         }
1066                         for (mesh = surf->mesh;mesh;mesh = mesh->chain)
1067                         {
1068                                 R_Mesh_ResizeCheck(mesh->numverts);
1069                                 memcpy(varray_vertex, mesh->verts, mesh->numverts * sizeof(float[4]));
1070                                 memcpy(varray_texcoord[0], mesh->str, mesh->numverts * sizeof(float[4]));
1071                                 memcpy(varray_texcoord[1], mesh->uvw, mesh->numverts * sizeof(float[4]));
1072                                 R_Mesh_Draw(mesh->numverts, mesh->numtriangles, mesh->index);
1073                         }
1074                 }
1075         }
1076 }
1077
1078 static void RSurfShader_OpaqueWall_Pass_BaseTexture(const entity_render_t *ent, const texture_t *texture, msurface_t **surfchain)
1079 {
1080         const msurface_t *surf;
1081         const surfmesh_t *mesh;
1082         rmeshstate_t m;
1083         memset(&m, 0, sizeof(m));
1084         m.blendfunc1 = GL_ONE;
1085         m.blendfunc2 = GL_ZERO;
1086         m.tex[0] = R_GetTexture(texture->texture);
1087         R_Mesh_State(&m);
1088         GL_Color(1, 1, 1, 1);
1089         while((surf = *surfchain++) != NULL)
1090         {
1091                 if (surf->visframe == r_framecount)
1092                 {
1093                         for (mesh = surf->mesh;mesh;mesh = mesh->chain)
1094                         {
1095                                 R_Mesh_ResizeCheck(mesh->numverts);
1096                                 memcpy(varray_vertex, mesh->verts, mesh->numverts * sizeof(float[4]));
1097                                 memcpy(varray_texcoord[0], mesh->str, mesh->numverts * sizeof(float[4]));
1098                                 R_Mesh_Draw(mesh->numverts, mesh->numtriangles, mesh->index);
1099                         }
1100                 }
1101         }
1102 }
1103
1104 static void RSurfShader_OpaqueWall_Pass_BaseLightmap(const entity_render_t *ent, const texture_t *texture, msurface_t **surfchain)
1105 {
1106         const msurface_t *surf;
1107         const surfmesh_t *mesh;
1108         rmeshstate_t m;
1109         int lightmaptexturenum;
1110         memset(&m, 0, sizeof(m));
1111         m.blendfunc1 = GL_ZERO;
1112         m.blendfunc2 = GL_SRC_COLOR;
1113         m.tex[0] = R_GetTexture((**surfchain).lightmaptexture);
1114         if (gl_combine.integer)
1115                 m.texrgbscale[0] = 4;
1116         R_Mesh_State(&m);
1117         GL_Color(r_colorscale, r_colorscale, r_colorscale, 1);
1118         while((surf = *surfchain++) != NULL)
1119         {
1120                 if (surf->visframe == r_framecount)
1121                 {
1122                         lightmaptexturenum = R_GetTexture(surf->lightmaptexture);
1123                         if (m.tex[0] != lightmaptexturenum)
1124                         {
1125                                 m.tex[0] = lightmaptexturenum;
1126                                 R_Mesh_State(&m);
1127                         }
1128                         for (mesh = surf->mesh;mesh;mesh = mesh->chain)
1129                         {
1130                                 R_Mesh_ResizeCheck(mesh->numverts);
1131                                 memcpy(varray_vertex, mesh->verts, mesh->numverts * sizeof(float[4]));
1132                                 memcpy(varray_texcoord[0], mesh->uvw, mesh->numverts * sizeof(float[4]));
1133                                 R_Mesh_Draw(mesh->numverts, mesh->numtriangles, mesh->index);
1134                         }
1135                 }
1136         }
1137 }
1138
1139 static void RSurfShader_OpaqueWall_Pass_Light(const entity_render_t *ent, const texture_t *texture, msurface_t **surfchain)
1140 {
1141         const msurface_t *surf;
1142         const surfmesh_t *mesh;
1143         float colorscale;
1144         rmeshstate_t m;
1145
1146         memset(&m, 0, sizeof(m));
1147         m.blendfunc1 = GL_SRC_ALPHA;
1148         m.blendfunc2 = GL_ONE;
1149         m.tex[0] = R_GetTexture(texture->texture);
1150         colorscale = r_colorscale;
1151         if (gl_combine.integer)
1152         {
1153                 m.texrgbscale[0] = 4;
1154                 colorscale *= 0.25f;
1155         }
1156         R_Mesh_State(&m);
1157         GL_UseColorArray();
1158         while((surf = *surfchain++) != NULL)
1159         {
1160                 if (surf->visframe == r_framecount && surf->dlightframe == r_framecount)
1161                 {
1162                         for (mesh = surf->mesh;mesh;mesh = mesh->chain)
1163                         {
1164                                 if (RSurf_LightCheck(&ent->inversematrix, surf->dlightbits, mesh))
1165                                 {
1166                                         R_Mesh_ResizeCheck(mesh->numverts);
1167                                         memcpy(varray_vertex, mesh->verts, mesh->numverts * sizeof(float[4]));
1168                                         memcpy(varray_texcoord[0], mesh->str, mesh->numverts * sizeof(float[4]));
1169                                         R_FillColors(varray_color, mesh->numverts, 0, 0, 0, 1);
1170                                         RSurf_LightSeparate(&ent->inversematrix, surf->dlightbits, mesh->numverts, varray_vertex, varray_color);
1171                                         RSurf_ScaleColors(varray_color, colorscale, mesh->numverts);
1172                                         R_Mesh_Draw(mesh->numverts, mesh->numtriangles, mesh->index);
1173                                 }
1174                         }
1175                 }
1176         }
1177 }
1178
1179 static void RSurfShader_OpaqueWall_Pass_Fog(const entity_render_t *ent, const texture_t *texture, msurface_t **surfchain)
1180 {
1181         const msurface_t *surf;
1182         const surfmesh_t *mesh;
1183         rmeshstate_t m;
1184         float modelorg[3];
1185         Matrix4x4_Transform(&ent->inversematrix, r_origin, modelorg);
1186         memset(&m, 0, sizeof(m));
1187         m.blendfunc1 = GL_SRC_ALPHA;
1188         m.blendfunc2 = GL_ONE_MINUS_SRC_ALPHA;
1189         R_Mesh_State(&m);
1190         GL_UseColorArray();
1191         while((surf = *surfchain++) != NULL)
1192         {
1193                 if (surf->visframe == r_framecount)
1194                 {
1195                         for (mesh = surf->mesh;mesh;mesh = mesh->chain)
1196                         {
1197                                 R_Mesh_ResizeCheck(mesh->numverts);
1198                                 memcpy(varray_vertex, mesh->verts, mesh->numverts * sizeof(float[4]));
1199                                 if (m.tex[0])
1200                                         memcpy(varray_texcoord[0], mesh->str, mesh->numverts * sizeof(float[4]));
1201                                 RSurf_FogPassColors(varray_vertex, varray_color, fogcolor[0], fogcolor[1], fogcolor[2], 1, r_colorscale, mesh->numverts, modelorg);
1202                                 R_Mesh_Draw(mesh->numverts, mesh->numtriangles, mesh->index);
1203                         }
1204                 }
1205         }
1206 }
1207
1208 static void RSurfShader_OpaqueWall_Pass_BaseDetail(const entity_render_t *ent, const texture_t *texture, msurface_t **surfchain)
1209 {
1210         const msurface_t *surf;
1211         const surfmesh_t *mesh;
1212         rmeshstate_t m;
1213         memset(&m, 0, sizeof(m));
1214         m.blendfunc1 = GL_DST_COLOR;
1215         m.blendfunc2 = GL_SRC_COLOR;
1216         m.tex[0] = R_GetTexture(texture->detailtexture);
1217         R_Mesh_State(&m);
1218         GL_Color(1, 1, 1, 1);
1219         while((surf = *surfchain++) != NULL)
1220         {
1221                 if (surf->visframe == r_framecount)
1222                 {
1223                         for (mesh = surf->mesh;mesh;mesh = mesh->chain)
1224                         {
1225                                 R_Mesh_ResizeCheck(mesh->numverts);
1226                                 memcpy(varray_vertex, mesh->verts, mesh->numverts * sizeof(float[4]));
1227                                 memcpy(varray_texcoord[0], mesh->abc, mesh->numverts * sizeof(float[4]));
1228                                 R_Mesh_Draw(mesh->numverts, mesh->numtriangles, mesh->index);
1229                         }
1230                 }
1231         }
1232 }
1233
1234 static void RSurfShader_OpaqueWall_Pass_Glow(const entity_render_t *ent, const texture_t *texture, msurface_t **surfchain)
1235 {
1236         const msurface_t *surf;
1237         const surfmesh_t *mesh;
1238         rmeshstate_t m;
1239         memset(&m, 0, sizeof(m));
1240         m.blendfunc1 = GL_SRC_ALPHA;
1241         m.blendfunc2 = GL_ONE;
1242         m.tex[0] = R_GetTexture(texture->glowtexture);
1243         R_Mesh_State(&m);
1244         GL_Color(r_colorscale, r_colorscale, r_colorscale, 1);
1245         while((surf = *surfchain++) != NULL)
1246         {
1247                 if (surf->visframe == r_framecount)
1248                 {
1249                         for (mesh = surf->mesh;mesh;mesh = mesh->chain)
1250                         {
1251                                 R_Mesh_ResizeCheck(mesh->numverts);
1252                                 memcpy(varray_vertex, mesh->verts, mesh->numverts * sizeof(float[4]));
1253                                 memcpy(varray_texcoord[0], mesh->str, mesh->numverts * sizeof(float[4]));
1254                                 R_Mesh_Draw(mesh->numverts, mesh->numtriangles, mesh->index);
1255                         }
1256                 }
1257         }
1258 }
1259
1260 static void RSurfShader_OpaqueWall_Pass_OpaqueGlow(const entity_render_t *ent, const texture_t *texture, msurface_t **surfchain)
1261 {
1262         const msurface_t *surf;
1263         const surfmesh_t *mesh;
1264         rmeshstate_t m;
1265         memset(&m, 0, sizeof(m));
1266         m.blendfunc1 = GL_SRC_ALPHA;
1267         m.blendfunc2 = GL_ZERO;
1268         m.tex[0] = R_GetTexture(texture->glowtexture);
1269         R_Mesh_State(&m);
1270         if (m.tex[0])
1271                 GL_Color(r_colorscale, r_colorscale, r_colorscale, 1);
1272         else
1273                 GL_Color(0, 0, 0, 1);
1274         while((surf = *surfchain++) != NULL)
1275         {
1276                 if (surf->visframe == r_framecount)
1277                 {
1278                         for (mesh = surf->mesh;mesh;mesh = mesh->chain)
1279                         {
1280                                 R_Mesh_ResizeCheck(mesh->numverts);
1281                                 memcpy(varray_vertex, mesh->verts, mesh->numverts * sizeof(float[4]));
1282                                 memcpy(varray_texcoord[0], mesh->str, mesh->numverts * sizeof(float[4]));
1283                                 R_Mesh_Draw(mesh->numverts, mesh->numtriangles, mesh->index);
1284                         }
1285                 }
1286         }
1287 }
1288
1289 static void RSurfShader_Wall_Vertex_Callback(const void *calldata1, int calldata2)
1290 {
1291         const entity_render_t *ent = calldata1;
1292         const msurface_t *surf = ent->model->surfaces + calldata2;
1293         int rendertype;
1294         float currentalpha;
1295         texture_t *texture;
1296         R_Mesh_Matrix(&ent->matrix);
1297
1298         texture = surf->texinfo->texture;
1299         if (texture->animated)
1300                 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];
1301
1302         currentalpha = ent->alpha;
1303         if (texture->flags & SURF_WATERALPHA)
1304                 currentalpha *= r_wateralpha.value;
1305         if (ent->effects & EF_ADDITIVE)
1306                 rendertype = SURFRENDER_ADD;
1307         else if (currentalpha < 1 || texture->fogtexture != NULL)
1308                 rendertype = SURFRENDER_ALPHA;
1309         else
1310                 rendertype = SURFRENDER_OPAQUE;
1311
1312         RSurfShader_Wall_Pass_BaseVertex(ent, surf, texture, rendertype, currentalpha);
1313         if (texture->glowtexture)
1314                 RSurfShader_Wall_Pass_Glow(ent, surf, texture, rendertype, currentalpha);
1315         if (fogenabled)
1316                 RSurfShader_Wall_Pass_Fog(ent, surf, texture, rendertype, currentalpha);
1317 }
1318
1319 static void RSurfShader_Wall_Lightmap(const entity_render_t *ent, const texture_t *texture, msurface_t **surfchain)
1320 {
1321         const msurface_t *surf;
1322         msurface_t **chain;
1323         vec3_t center;
1324         if (texture->rendertype != SURFRENDER_OPAQUE)
1325         {
1326                 // transparent vertex shaded from lightmap
1327                 for (chain = surfchain;(surf = *chain) != NULL;chain++)
1328                 {
1329                         if (surf->visframe == r_framecount)
1330                         {
1331                                 Matrix4x4_Transform(&ent->matrix, surf->poly_center, center);
1332                                 R_MeshQueue_AddTransparent(center, RSurfShader_Wall_Vertex_Callback, ent, surf - ent->model->surfaces);
1333                         }
1334                 }
1335         }
1336         else if (r_shadow_lightingmode >= 2)
1337         {
1338                 // opaque base lighting
1339                 RSurfShader_OpaqueWall_Pass_OpaqueGlow(ent, texture, surfchain);
1340                 if (fogenabled)
1341                         RSurfShader_OpaqueWall_Pass_Fog(ent, texture, surfchain);
1342         }
1343         else if (r_vertexsurfaces.integer)
1344         {
1345                 // opaque vertex shaded from lightmap
1346                 for (chain = surfchain;(surf = *chain) != NULL;chain++)
1347                         if (surf->visframe == r_framecount)
1348                                 RSurfShader_Wall_Pass_BaseVertex(ent, surf, texture, texture->rendertype, texture->currentalpha);
1349                 if (texture->glowtexture)
1350                         for (chain = surfchain;(surf = *chain) != NULL;chain++)
1351                                 if (surf->visframe == r_framecount)
1352                                         RSurfShader_Wall_Pass_Glow(ent, surf, texture, texture->rendertype, texture->currentalpha);
1353                 if (fogenabled)
1354                         for (chain = surfchain;(surf = *chain) != NULL;chain++)
1355                                 if (surf->visframe == r_framecount)
1356                                         RSurfShader_Wall_Pass_Fog(ent, surf, texture, texture->rendertype, texture->currentalpha);
1357         }
1358         else
1359         {
1360                 // opaque lightmapped
1361                 if (r_textureunits.integer >= 2)
1362                 {
1363                         if (r_textureunits.integer >= 3 && gl_combine.integer && r_detailtextures.integer)
1364                                 RSurfShader_OpaqueWall_Pass_BaseTripleTexCombine(ent, texture, surfchain);
1365                         else
1366                         {
1367                                 RSurfShader_OpaqueWall_Pass_BaseDoubleTex(ent, texture, surfchain);
1368                                 if (r_detailtextures.integer)
1369                                         RSurfShader_OpaqueWall_Pass_BaseDetail(ent, texture, surfchain);
1370                         }
1371                 }
1372                 else
1373                 {
1374                         RSurfShader_OpaqueWall_Pass_BaseTexture(ent, texture, surfchain);
1375                         RSurfShader_OpaqueWall_Pass_BaseLightmap(ent, texture, surfchain);
1376                         if (r_detailtextures.integer)
1377                                 RSurfShader_OpaqueWall_Pass_BaseDetail(ent, texture, surfchain);
1378                 }
1379                 if (!r_dlightmap.integer && !(ent->effects & EF_FULLBRIGHT))
1380                         RSurfShader_OpaqueWall_Pass_Light(ent, texture, surfchain);
1381                 if (texture->glowtexture)
1382                         RSurfShader_OpaqueWall_Pass_Glow(ent, texture, surfchain);
1383                 if (fogenabled)
1384                         RSurfShader_OpaqueWall_Pass_Fog(ent, texture, surfchain);
1385         }
1386 }
1387
1388 Cshader_t Cshader_wall_lightmap = {{NULL, RSurfShader_Wall_Lightmap}, SHADERFLAGS_NEEDLIGHTMAP};
1389 Cshader_t Cshader_water = {{NULL, RSurfShader_Water}, 0};
1390 Cshader_t Cshader_sky = {{RSurfShader_Sky, NULL}, 0};
1391
1392 int Cshader_count = 3;
1393 Cshader_t *Cshaders[3] =
1394 {
1395         &Cshader_wall_lightmap,
1396         &Cshader_water,
1397         &Cshader_sky
1398 };
1399
1400 void R_UpdateTextureInfo(entity_render_t *ent)
1401 {
1402         int i, texframe, alttextures;
1403         texture_t *t;
1404
1405         if (!ent->model)
1406                 return;
1407
1408         alttextures = ent->frame != 0;
1409         texframe = (int)(cl.time * 5.0f);
1410         for (i = 0;i < ent->model->numtextures;i++)
1411         {
1412                 t = ent->model->textures + i;
1413                 t->currentalpha = ent->alpha;
1414                 if (t->flags & SURF_WATERALPHA)
1415                         t->currentalpha *= r_wateralpha.value;
1416                 if (ent->effects & EF_ADDITIVE)
1417                         t->rendertype = SURFRENDER_ADD;
1418                 else if (t->currentalpha < 1 || t->fogtexture != NULL)
1419                         t->rendertype = SURFRENDER_ALPHA;
1420                 else
1421                         t->rendertype = SURFRENDER_OPAQUE;
1422                 // we don't need to set currentframe if t->animated is false because
1423                 // it was already set up by the texture loader for non-animating
1424                 if (t->animated)
1425                         t->currentframe = t->anim_frames[alttextures][(t->anim_total[alttextures] >= 2) ? (texframe % t->anim_total[alttextures]) : 0];
1426         }
1427 }
1428
1429 void R_PrepareSurfaces(entity_render_t *ent)
1430 {
1431         int i, numsurfaces, *surfacevisframes;
1432         model_t *model;
1433         msurface_t *surf, *surfaces, **surfchain;
1434         vec3_t modelorg;
1435
1436         if (!ent->model)
1437                 return;
1438
1439         model = ent->model;
1440         Matrix4x4_Transform(&ent->inversematrix, r_origin, modelorg);
1441         numsurfaces = model->nummodelsurfaces;
1442         surfaces = model->surfaces + model->firstmodelsurface;
1443         surfacevisframes = model->surfacevisframes + model->firstmodelsurface;
1444
1445         R_UpdateTextureInfo(ent);
1446
1447         if (r_dynamic.integer && r_shadow_lightingmode < 1)
1448                 R_MarkLights(ent);
1449
1450         if (model->light_ambient != r_ambient.value || model->light_scalebit != r_lightmapscalebit)
1451         {
1452                 model->light_ambient = r_ambient.value;
1453                 model->light_scalebit = r_lightmapscalebit;
1454                 for (i = 0;i < model->nummodelsurfaces;i++)
1455                         model->surfaces[i + model->firstmodelsurface].cached_dlight = true;
1456         }
1457         else
1458         {
1459                 for (i = 0;i < model->light_styles;i++)
1460                 {
1461                         if (model->light_stylevalue[i] != d_lightstylevalue[model->light_style[i]])
1462                         {
1463                                 model->light_stylevalue[i] = d_lightstylevalue[model->light_style[i]];
1464                                 for (surfchain = model->light_styleupdatechains[i];*surfchain;surfchain++)
1465                                         (**surfchain).cached_dlight = true;
1466                         }
1467                 }
1468         }
1469
1470         for (i = 0, surf = surfaces;i < numsurfaces;i++, surf++)
1471         {
1472                 if (surfacevisframes[i] == r_framecount)
1473                 {
1474 #if !WORLDNODECULLBACKFACES
1475                         // mark any backface surfaces as not visible
1476                         if (PlaneDist(modelorg, surf->plane) < surf->plane->dist)
1477                         {
1478                                 if (!(surf->flags & SURF_PLANEBACK))
1479                                         surfacevisframes[i] = -1;
1480                         }
1481                         else
1482                         {
1483                                 if ((surf->flags & SURF_PLANEBACK))
1484                                         surfacevisframes[i] = -1;
1485                         }
1486                         if (surfacevisframes[i] == r_framecount)
1487 #endif
1488                         {
1489                                 c_faces++;
1490                                 surf->visframe = r_framecount;
1491 #if 1
1492                                 if (surf->cached_dlight && surf->lightmaptexture != NULL && !r_vertexsurfaces.integer)
1493                                         R_BuildLightMap(ent, surf, false); // base lighting changed
1494 #else
1495                                 if (!r_vertexsurfaces.integer && surf->lightmaptexture != NULL)
1496                                 {
1497                                         if (surf->cached_dlight
1498                                          || surf->cached_ambient != r_ambient.value
1499                                          || surf->cached_lightmapscalebit != r_lightmapscalebit)
1500                                                 R_BuildLightMap(ent, surf, false); // base lighting changed
1501                                         else if (r_dynamic.integer)
1502                                         {
1503                                                 if  (surf->styles[0] != 255 && (d_lightstylevalue[surf->styles[0]] != surf->cached_light[0]
1504                                                  || (surf->styles[1] != 255 && (d_lightstylevalue[surf->styles[1]] != surf->cached_light[1]
1505                                                  || (surf->styles[2] != 255 && (d_lightstylevalue[surf->styles[2]] != surf->cached_light[2]
1506                                                  || (surf->styles[3] != 255 && (d_lightstylevalue[surf->styles[3]] != surf->cached_light[3]))))))))
1507                                                         R_BuildLightMap(ent, surf, false); // base lighting changed
1508                                                 else if (surf->dlightframe == r_framecount && r_dlightmap.integer)
1509                                                         R_BuildLightMap(ent, surf, true); // only dlights
1510                                         }
1511                                 }
1512 #endif
1513                         }
1514                 }
1515         }
1516 }
1517
1518 void R_DrawSurfaces(entity_render_t *ent, int type, msurface_t ***chains)
1519 {
1520         int i;
1521         texture_t *t;
1522         R_Mesh_Matrix(&ent->matrix);
1523         for (i = 0, t = ent->model->textures;i < ent->model->numtextures;i++, t++)
1524                 if (t->shader->shaderfunc[type] && t->currentframe && chains[i] != NULL)
1525                         t->shader->shaderfunc[type](ent, t->currentframe, chains[i]);
1526 }
1527
1528 static void R_DrawPortal_Callback(const void *calldata1, int calldata2)
1529 {
1530         int i;
1531         float *v;
1532         rmeshstate_t m;
1533         const entity_render_t *ent = calldata1;
1534         const mportal_t *portal = ent->model->portals + calldata2;
1535         memset(&m, 0, sizeof(m));
1536         m.blendfunc1 = GL_SRC_ALPHA;
1537         m.blendfunc2 = GL_ONE_MINUS_SRC_ALPHA;
1538         R_Mesh_Matrix(&ent->matrix);
1539         R_Mesh_State(&m);
1540         R_Mesh_ResizeCheck(portal->numpoints);
1541         i = portal - ent->model->portals;
1542         GL_Color(((i & 0x0007) >> 0) * (1.0f / 7.0f) * r_colorscale,
1543                          ((i & 0x0038) >> 3) * (1.0f / 7.0f) * r_colorscale,
1544                          ((i & 0x01C0) >> 6) * (1.0f / 7.0f) * r_colorscale,
1545                          0.125f);
1546         if (PlaneDiff(r_origin, (&portal->plane)) > 0)
1547         {
1548                 for (i = portal->numpoints - 1, v = varray_vertex;i >= 0;i--, v += 4)
1549                         VectorCopy(portal->points[i].position, v);
1550         }
1551         else
1552                 for (i = 0, v = varray_vertex;i < portal->numpoints;i++, v += 4)
1553                         VectorCopy(portal->points[i].position, v);
1554         R_Mesh_Draw(portal->numpoints, portal->numpoints - 2, polygonelements);
1555 }
1556
1557 static void R_DrawPortals(entity_render_t *ent)
1558 {
1559         int i;
1560         mportal_t *portal, *endportal;
1561         float temp[3], center[3], f;
1562         for (portal = ent->model->portals, endportal = portal + ent->model->numportals;portal < endportal;portal++)
1563         {
1564                 if ((portal->here->pvsframe == ent->model->pvsframecount || portal->past->pvsframe == ent->model->pvsframecount) && portal->numpoints <= POLYGONELEMENTS_MAXPOINTS)
1565                 {
1566                         VectorClear(temp);
1567                         for (i = 0;i < portal->numpoints;i++)
1568                                 VectorAdd(temp, portal->points[i].position, temp);
1569                         f = ixtable[portal->numpoints];
1570                         VectorScale(temp, f, temp);
1571                         Matrix4x4_Transform(&ent->matrix, temp, center);
1572                         R_MeshQueue_AddTransparent(center, R_DrawPortal_Callback, ent, portal - ent->model->portals);
1573                 }
1574         }
1575 }
1576
1577 void R_PrepareBrushModel(entity_render_t *ent)
1578 {
1579         int i, numsurfaces, *surfacevisframes, *surfacepvsframes;
1580         msurface_t *surf;
1581         model_t *model;
1582 #if WORLDNODECULLBACKFACES
1583         vec3_t modelorg;
1584 #endif
1585
1586         // because bmodels can be reused, we have to decide which things to render
1587         // from scratch every time
1588         model = ent->model;
1589 #if WORLDNODECULLBACKFACES
1590         Matrix4x4_Transform(&ent->inversematrix, r_origin, modelorg);
1591 #endif
1592         numsurfaces = model->nummodelsurfaces;
1593         surf = model->surfaces + model->firstmodelsurface;
1594         surfacevisframes = model->surfacevisframes + model->firstmodelsurface;
1595         surfacepvsframes = model->surfacepvsframes + model->firstmodelsurface;
1596         for (i = 0;i < numsurfaces;i++, surf++)
1597         {
1598 #if WORLDNODECULLBACKFACES
1599                 // mark any backface surfaces as not visible
1600                 if (PlaneDist(modelorg, surf->plane) < surf->plane->dist)
1601                 {
1602                         if ((surf->flags & SURF_PLANEBACK))
1603                                 surfacevisframes[i] = r_framecount;
1604                 }
1605                 else if (!(surf->flags & SURF_PLANEBACK))
1606                         surfacevisframes[i] = r_framecount;
1607 #else
1608                 surfacevisframes[i] = r_framecount;
1609 #endif
1610                 surf->dlightframe = -1;
1611         }
1612         R_PrepareSurfaces(ent);
1613 }
1614
1615 void R_SurfaceWorldNode (entity_render_t *ent)
1616 {
1617         int i, *surfacevisframes, *surfacepvsframes, surfnum;
1618         msurface_t *surf;
1619         mleaf_t *leaf;
1620         model_t *model;
1621         vec3_t modelorg;
1622
1623         model = ent->model;
1624         surfacevisframes = model->surfacevisframes + model->firstmodelsurface;
1625         surfacepvsframes = model->surfacepvsframes + model->firstmodelsurface;
1626         Matrix4x4_Transform(&ent->inversematrix, r_origin, modelorg);
1627
1628         for (leaf = model->pvsleafchain;leaf;leaf = leaf->pvschain)
1629         {
1630                 if (!R_CullBox (leaf->mins, leaf->maxs))
1631                 {
1632                         c_leafs++;
1633                         leaf->visframe = r_framecount;
1634                 }
1635         }
1636
1637         for (i = 0;i < model->pvssurflistlength;i++)
1638         {
1639                 surfnum = model->pvssurflist[i];
1640                 surf = model->surfaces + surfnum;
1641 #if WORLDNODECULLBACKFACES
1642                 if (PlaneDist(modelorg, surf->plane) < surf->plane->dist)
1643                 {
1644                         if ((surf->flags & SURF_PLANEBACK) && !R_CullBox (surf->poly_mins, surf->poly_maxs))
1645                                 surfacevisframes[surfnum] = r_framecount;
1646                 }
1647                 else
1648                 {
1649                         if (!(surf->flags & SURF_PLANEBACK) && !R_CullBox (surf->poly_mins, surf->poly_maxs))
1650                                 surfacevisframes[surfnum] = r_framecount;
1651                 }
1652 #else
1653                 if (!R_CullBox (surf->poly_mins, surf->poly_maxs))
1654                         surfacevisframes[surfnum] = r_framecount;
1655 #endif
1656         }
1657 }
1658
1659 static void R_PortalWorldNode(entity_render_t *ent, mleaf_t *viewleaf)
1660 {
1661         int c, leafstackpos, *mark, *surfacevisframes;
1662 #if WORLDNODECULLBACKFACES
1663         int n;
1664         msurface_t *surf;
1665 #endif
1666         mleaf_t *leaf, *leafstack[8192];
1667         mportal_t *p;
1668         vec3_t modelorg;
1669         msurface_t *surfaces;
1670         // LordHavoc: portal-passage worldnode with PVS;
1671         // follows portals leading outward from viewleaf, does not venture
1672         // offscreen or into leafs that are not visible, faster than Quake's
1673         // RecursiveWorldNode
1674         surfaces = ent->model->surfaces;
1675         surfacevisframes = ent->model->surfacevisframes;
1676         Matrix4x4_Transform(&ent->inversematrix, r_origin, modelorg);
1677         viewleaf->worldnodeframe = r_framecount;
1678         leafstack[0] = viewleaf;
1679         leafstackpos = 1;
1680         while (leafstackpos)
1681         {
1682                 c_leafs++;
1683                 leaf = leafstack[--leafstackpos];
1684                 leaf->visframe = r_framecount;
1685                 // draw any surfaces bounding this leaf
1686                 if (leaf->nummarksurfaces)
1687                 {
1688                         for (c = leaf->nummarksurfaces, mark = leaf->firstmarksurface;c;c--)
1689                         {
1690 #if WORLDNODECULLBACKFACES
1691                                 n = *mark++;
1692                                 if (surfacevisframes[n] != r_framecount)
1693                                 {
1694                                         surf = surfaces + n;
1695                                         if (PlaneDist(modelorg, surf->plane) < surf->plane->dist)
1696                                         {
1697                                                 if ((surf->flags & SURF_PLANEBACK))
1698                                                         surfacevisframes[n] = r_framecount;
1699                                         }
1700                                         else
1701                                         {
1702                                                 if (!(surf->flags & SURF_PLANEBACK))
1703                                                         surfacevisframes[n] = r_framecount;
1704                                         }
1705                                 }
1706 #else
1707                                 surfacevisframes[*mark++] = r_framecount;
1708 #endif
1709                         }
1710                 }
1711                 // follow portals into other leafs
1712                 for (p = leaf->portals;p;p = p->next)
1713                 {
1714                         // LordHavoc: this DotProduct hurts less than a cache miss
1715                         // (which is more likely to happen if backflowing through leafs)
1716                         if (DotProduct(modelorg, p->plane.normal) < (p->plane.dist + 1))
1717                         {
1718                                 leaf = p->past;
1719                                 if (leaf->worldnodeframe != r_framecount)
1720                                 {
1721                                         leaf->worldnodeframe = r_framecount;
1722                                         // FIXME: R_CullBox is absolute, should be done relative
1723                                         if (leaf->pvsframe == ent->model->pvsframecount && !R_CullBox(leaf->mins, leaf->maxs))
1724                                                 leafstack[leafstackpos++] = leaf;
1725                                 }
1726                         }
1727                 }
1728         }
1729         if (r_drawportals.integer)
1730                 R_DrawPortals(ent);
1731 }
1732
1733 void R_PVSUpdate (entity_render_t *ent, mleaf_t *viewleaf)
1734 {
1735         int i, j, l, c, bits, *surfacepvsframes, *mark;
1736         mleaf_t *leaf;
1737         qbyte *vis;
1738         model_t *model;
1739
1740         model = ent->model;
1741         if (model && (model->pvsviewleaf != viewleaf || model->pvsviewleafnovis != r_novis.integer))
1742         {
1743                 model->pvsframecount++;
1744                 model->pvsviewleaf = viewleaf;
1745                 model->pvsviewleafnovis = r_novis.integer;
1746                 model->pvsleafchain = NULL;
1747                 model->pvssurflistlength = 0;
1748                 if (viewleaf)
1749                 {
1750                         surfacepvsframes = model->surfacepvsframes;
1751                         vis = Mod_LeafPVS (viewleaf, model);
1752                         for (j = 0;j < model->numleafs;j += 8)
1753                         {
1754                                 bits = *vis++;
1755                                 if (bits)
1756                                 {
1757                                         l = model->numleafs - j;
1758                                         if (l > 8)
1759                                                 l = 8;
1760                                         for (i = 0;i < l;i++)
1761                                         {
1762                                                 if (bits & (1 << i))
1763                                                 {
1764                                                         leaf = &model->leafs[j + i + 1];
1765                                                         leaf->pvschain = model->pvsleafchain;
1766                                                         model->pvsleafchain = leaf;
1767                                                         leaf->pvsframe = model->pvsframecount;
1768                                                         // mark surfaces bounding this leaf as visible
1769                                                         for (c = leaf->nummarksurfaces, mark = leaf->firstmarksurface;c;c--, mark++)
1770                                                                 surfacepvsframes[*mark] = model->pvsframecount;
1771                                                 }
1772                                         }
1773                                 }
1774                         }
1775                         Mod_BuildPVSTextureChains(model);
1776                 }
1777         }
1778 }
1779
1780 void R_WorldVisibility (entity_render_t *ent)
1781 {
1782         vec3_t modelorg;
1783         mleaf_t *viewleaf;
1784
1785         Matrix4x4_Transform(&ent->inversematrix, r_origin, modelorg);
1786         viewleaf = Mod_PointInLeaf (modelorg, ent->model);
1787         R_PVSUpdate(ent, viewleaf);
1788
1789         if (!viewleaf)
1790                 return;
1791
1792         if (r_surfaceworldnode.integer || viewleaf->contents == CONTENTS_SOLID)
1793                 R_SurfaceWorldNode (ent);
1794         else
1795                 R_PortalWorldNode (ent, viewleaf);
1796 }
1797
1798 void R_DrawWorld (entity_render_t *ent)
1799 {
1800         R_PrepareSurfaces(ent);
1801         R_DrawSurfaces(ent, SHADERSTAGE_SKY, ent->model->pvstexturechains);
1802         R_DrawSurfaces(ent, SHADERSTAGE_NORMAL, ent->model->pvstexturechains);
1803 }
1804
1805 void R_Model_Brush_DrawSky (entity_render_t *ent)
1806 {
1807         if (ent != &cl_entities[0].render)
1808                 R_PrepareBrushModel(ent);
1809         R_DrawSurfaces(ent, SHADERSTAGE_SKY, ent->model->pvstexturechains);
1810 }
1811
1812 void R_Model_Brush_Draw (entity_render_t *ent)
1813 {
1814         c_bmodels++;
1815         if (ent != &cl_entities[0].render)
1816                 R_PrepareBrushModel(ent);
1817         R_DrawSurfaces(ent, SHADERSTAGE_NORMAL, ent->model->pvstexturechains);
1818 }
1819
1820 void R_Model_Brush_DrawShadowVolume (entity_render_t *ent, vec3_t relativelightorigin, float lightradius)
1821 {
1822         int i;
1823         msurface_t *surf;
1824         float projectdistance, f, temp[3], lightradius2;
1825         surfmesh_t *mesh;
1826         R_Mesh_Matrix(&ent->matrix);
1827         lightradius2 = lightradius * lightradius;
1828         R_UpdateTextureInfo(ent);
1829         projectdistance = 1000000000.0f;//lightradius + ent->model->radius;
1830         for (i = 0, surf = ent->model->surfaces + ent->model->firstmodelsurface;i < ent->model->nummodelsurfaces;i++, surf++)
1831         {
1832                 if (surf->texinfo->texture->rendertype == SURFRENDER_OPAQUE && surf->flags & SURF_SHADOWCAST)
1833                 {
1834                         f = PlaneDiff(relativelightorigin, surf->plane);
1835                         if (surf->flags & SURF_PLANEBACK)
1836                                 f = -f;
1837                         // draw shadows only for frontfaces and only if they are close
1838                         if (f >= 0.1 && f < lightradius)
1839                         {
1840                                 temp[0] = bound(surf->poly_mins[0], relativelightorigin[0], surf->poly_maxs[0]) - relativelightorigin[0];
1841                                 temp[1] = bound(surf->poly_mins[1], relativelightorigin[1], surf->poly_maxs[1]) - relativelightorigin[1];
1842                                 temp[2] = bound(surf->poly_mins[2], relativelightorigin[2], surf->poly_maxs[2]) - relativelightorigin[2];
1843                                 if (DotProduct(temp, temp) < lightradius2)
1844                                 {
1845                                         for (mesh = surf->mesh;mesh;mesh = mesh->chain)
1846                                         {
1847                                                 R_Mesh_ResizeCheck(mesh->numverts * 2);
1848                                                 memcpy(varray_vertex, mesh->verts, mesh->numverts * sizeof(float[4]));
1849                                                 R_Shadow_Volume(mesh->numverts, mesh->numtriangles, mesh->index, mesh->triangleneighbors, relativelightorigin, lightradius, projectdistance);
1850                                         }
1851                                 }
1852                         }
1853                 }
1854         }
1855 }
1856
1857 void R_Model_Brush_DrawLightForSurfaceList(entity_render_t *ent, vec3_t relativelightorigin, vec3_t relativeeyeorigin, float lightradius, float *lightcolor, msurface_t **surflist, int numsurfaces)
1858 {
1859         int surfnum;
1860         msurface_t *surf;
1861         texture_t *t;
1862         surfmesh_t *mesh;
1863         R_Mesh_Matrix(&ent->matrix);
1864         R_UpdateTextureInfo(ent);
1865         for (surfnum = 0;surfnum < numsurfaces;surfnum++)
1866         {
1867                 surf = surflist[surfnum];
1868                 if (surf->visframe == r_framecount)
1869                 {
1870                         t = surf->texinfo->texture->currentframe;
1871                         if (t->rendertype == SURFRENDER_OPAQUE && t->flags & SURF_SHADOWLIGHT)
1872                         {
1873                                 for (mesh = surf->mesh;mesh;mesh = mesh->chain)
1874                                 {
1875                                         R_Mesh_ResizeCheck(mesh->numverts);
1876                                         memcpy(varray_vertex, mesh->verts, mesh->numverts * sizeof(float[4]));
1877                                         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);
1878                                         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);
1879                                 }
1880                         }
1881                 }
1882         }
1883 }
1884
1885 void R_Model_Brush_DrawLight(entity_render_t *ent, vec3_t relativelightorigin, vec3_t relativeeyeorigin, float lightradius, float *lightcolor)
1886 {
1887         int surfnum;
1888         msurface_t *surf;
1889         texture_t *t;
1890         float f, lightradius2, temp[3];
1891         surfmesh_t *mesh;
1892         R_Mesh_Matrix(&ent->matrix);
1893         lightradius2 = lightradius * lightradius;
1894         R_UpdateTextureInfo(ent);
1895         if (ent != &cl_entities[0].render)
1896         {
1897                 // bmodel, cull crudely to view and light
1898                 for (surfnum = 0, surf = ent->model->surfaces + ent->model->firstmodelsurface;surfnum < ent->model->nummodelsurfaces;surfnum++, surf++)
1899                 {
1900                         temp[0] = bound(surf->poly_mins[0], relativelightorigin[0], surf->poly_maxs[0]) - relativelightorigin[0];
1901                         temp[1] = bound(surf->poly_mins[1], relativelightorigin[1], surf->poly_maxs[1]) - relativelightorigin[1];
1902                         temp[2] = bound(surf->poly_mins[2], relativelightorigin[2], surf->poly_maxs[2]) - relativelightorigin[2];
1903                         if (DotProduct(temp, temp) < lightradius2)
1904                         {
1905                                 f = PlaneDiff(relativelightorigin, surf->plane);
1906                                 if (surf->flags & SURF_PLANEBACK)
1907                                         f = -f;
1908                                 if (f >= -0.1 && f < lightradius)
1909                                 {
1910                                         f = PlaneDiff(relativeeyeorigin, surf->plane);
1911                                         if (surf->flags & SURF_PLANEBACK)
1912                                                 f = -f;
1913                                         if (f > 0)
1914                                         {
1915                                                 t = surf->texinfo->texture->currentframe;
1916                                                 if (t->rendertype == SURFRENDER_OPAQUE && t->flags & SURF_SHADOWLIGHT)
1917                                                 {
1918                                                         for (mesh = surf->mesh;mesh;mesh = mesh->chain)
1919                                                         {
1920                                                                 R_Mesh_ResizeCheck(mesh->numverts);
1921                                                                 memcpy(varray_vertex, mesh->verts, mesh->numverts * sizeof(float[4]));
1922                                                                 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);
1923                                                                 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);
1924                                                         }
1925                                                 }
1926                                         }
1927                                 }
1928                         }
1929                 }
1930         }
1931         else
1932         {
1933                 // world, already culled to view, just cull to light
1934                 for (surfnum = 0, surf = ent->model->surfaces + ent->model->firstmodelsurface;surfnum < ent->model->nummodelsurfaces;surfnum++, surf++)
1935                 {
1936                         if (surf->visframe == r_framecount)
1937                         {
1938                                 temp[0] = bound(surf->poly_mins[0], relativelightorigin[0], surf->poly_maxs[0]) - relativelightorigin[0];
1939                                 temp[1] = bound(surf->poly_mins[1], relativelightorigin[1], surf->poly_maxs[1]) - relativelightorigin[1];
1940                                 temp[2] = bound(surf->poly_mins[2], relativelightorigin[2], surf->poly_maxs[2]) - relativelightorigin[2];
1941                                 if (DotProduct(temp, temp) < lightradius2)
1942                                 {
1943                                         f = PlaneDiff(relativelightorigin, surf->plane);
1944                                         if (surf->flags & SURF_PLANEBACK)
1945                                                 f = -f;
1946                                         if (f >= -0.1 && f < lightradius)
1947                                         {
1948                                                 t = surf->texinfo->texture->currentframe;
1949                                                 if (t->rendertype == SURFRENDER_OPAQUE && t->flags & SURF_SHADOWLIGHT)
1950                                                 {
1951                                                         for (mesh = surf->mesh;mesh;mesh = mesh->chain)
1952                                                         {
1953                                                                 R_Mesh_ResizeCheck(mesh->numverts);
1954                                                                 memcpy(varray_vertex, mesh->verts, mesh->numverts * sizeof(float[4]));
1955                                                                 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);
1956                                                                 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);
1957                                                         }
1958                                                 }
1959                                         }
1960                                 }
1961                         }
1962                 }
1963         }
1964 }
1965
1966 static void gl_surf_start(void)
1967 {
1968 }
1969
1970 static void gl_surf_shutdown(void)
1971 {
1972 }
1973
1974 static void gl_surf_newmap(void)
1975 {
1976 }
1977
1978 void GL_Surf_Init(void)
1979 {
1980         int i;
1981         dlightdivtable[0] = 4194304;
1982         for (i = 1;i < 32768;i++)
1983                 dlightdivtable[i] = 4194304 / (i << 7);
1984
1985         Cvar_RegisterVariable(&r_ambient);
1986         Cvar_RegisterVariable(&r_vertexsurfaces);
1987         Cvar_RegisterVariable(&r_dlightmap);
1988         Cvar_RegisterVariable(&r_drawportals);
1989         Cvar_RegisterVariable(&r_testvis);
1990         Cvar_RegisterVariable(&r_floatbuildlightmap);
1991         Cvar_RegisterVariable(&r_detailtextures);
1992         Cvar_RegisterVariable(&r_surfaceworldnode);
1993
1994         R_RegisterModule("GL_Surf", gl_surf_start, gl_surf_shutdown, gl_surf_newmap);
1995 }
1996