gl_rsurf.c

   1 /*
   2 Copyright (C) 1996-1997 Id Software, Inc.
   3
   4 This program is free software; you can redistribute it and/or
   5 modify it under the terms of the GNU General Public License
   6 as published by the Free Software Foundation; either version 2
   7 of the License, or (at your option) any later version.
   8
   9 This program is distributed in the hope that it will be useful,
  10 but WITHOUT ANY WARRANTY; without even the implied warranty of
  11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
  12
  13 See the GNU General Public License for more details.
  14
  15 You should have received a copy of the GNU General Public License
  16 along with this program; if not, write to the Free Software
  17 Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
  18
  19 */
  20 // r_surf.c: surface-related refresh code
  21
  22 #include "quakedef.h"
  23 #include "r_shadow.h"
  24
  25 #define MAX_LIGHTMAP_SIZE 256
  26
  27 static unsigned int intblocklights[MAX_LIGHTMAP_SIZE*MAX_LIGHTMAP_SIZE*3]; // LordHavoc: *3 for colored lighting
  28 static float floatblocklights[MAX_LIGHTMAP_SIZE*MAX_LIGHTMAP_SIZE*3]; // LordHavoc: *3 for colored lighting
  29
  30 static qbyte templight[MAX_LIGHTMAP_SIZE*MAX_LIGHTMAP_SIZE*4];
  31
  32 cvar_t r_ambient = {0, "r_ambient", "0"};
  33 cvar_t r_vertexsurfaces = {0, "r_vertexsurfaces", "0"};
  34 cvar_t r_dlightmap = {CVAR_SAVE, "r_dlightmap", "1"};
  35 cvar_t r_drawportals = {0, "r_drawportals", "0"};
  36 cvar_t r_testvis = {0, "r_testvis", "0"};
  37 cvar_t r_floatbuildlightmap = {0, "r_floatbuildlightmap", "0"};
  38 cvar_t r_detailtextures = {CVAR_SAVE, "r_detailtextures", "1"};
  39 cvar_t r_surfaceworldnode = {0, "r_surfaceworldnode", "1"};
  40
  41 static int dlightdivtable[32768];
  42
  43 static int R_IntAddDynamicLights (const matrix4x4_t *matrix, msurface_t *surf)
  44 {
  45         int sdtable[256], lnum, td, maxdist, maxdist2, maxdist3, i, s, t, smax, tmax, smax3, red, green, blue, lit, dist2, impacts, impactt, subtract, k;
  46         unsigned int *bl;
  47         float dist, impact[3], local[3];
  48
  49         lit = false;
  50
  51         smax = (surf->extents[0] >> 4) + 1;
  52         tmax = (surf->extents[1] >> 4) + 1;
  53         smax3 = smax * 3;
  54
  55         for (lnum = 0; lnum < r_numdlights; lnum++)
  56         {
  57                 if (!(surf->dlightbits[lnum >> 5] & (1 << (lnum & 31))))
  58                         continue;                                       // not lit by this light
  59
  60                 Matrix4x4_Transform(matrix, r_dlight[lnum].origin, local);
  61                 dist = DotProduct (local, surf->plane->normal) - surf->plane->dist;
  62
  63                 // for comparisons to minimum acceptable light
  64                 // compensate for LIGHTOFFSET
  65                 maxdist = (int) r_dlight[lnum].cullradius2 + LIGHTOFFSET;
  66
  67                 dist2 = dist * dist;
  68                 dist2 += LIGHTOFFSET;
  69                 if (dist2 >= maxdist)
  70                         continue;
  71
  72                 if (surf->plane->type < 3)
  73                 {
  74                         VectorCopy(local, impact);
  75                         impact[surf->plane->type] -= dist;
  76                 }
  77                 else
  78                 {
  79                         impact[0] = local[0] - surf->plane->normal[0] * dist;
  80                         impact[1] = local[1] - surf->plane->normal[1] * dist;
  81                         impact[2] = local[2] - surf->plane->normal[2] * dist;
  82                 }
  83
  84                 impacts = DotProduct (impact, surf->texinfo->vecs[0]) + surf->texinfo->vecs[0][3] - surf->texturemins[0];
  85                 impactt = DotProduct (impact, surf->texinfo->vecs[1]) + surf->texinfo->vecs[1][3] - surf->texturemins[1];
  86
  87                 s = bound(0, impacts, smax * 16) - impacts;
  88                 t = bound(0, impactt, tmax * 16) - impactt;
  89                 i = s * s + t * t + dist2;
  90                 if (i > maxdist)
  91                         continue;
  92
  93                 // reduce calculations
  94                 for (s = 0, i = impacts; s < smax; s++, i -= 16)
  95                         sdtable[s] = i * i + dist2;
  96
  97                 maxdist3 = maxdist - dist2;
  98
  99                 // convert to 8.8 blocklights format
 100                 red = r_dlight[lnum].light[0] * (1.0f / 128.0f);
 101                 green = r_dlight[lnum].light[1] * (1.0f / 128.0f);
 102                 blue = r_dlight[lnum].light[2] * (1.0f / 128.0f);
 103                 subtract = (int) (r_dlight[lnum].subtract * 4194304.0f);
 104                 bl = intblocklights;
 105
 106                 i = impactt;
 107                 for (t = 0;t < tmax;t++, i -= 16)
 108                 {
 109                         td = i * i;
 110                         // make sure some part of it is visible on this line
 111                         if (td < maxdist3)
 112                         {
 113                                 maxdist2 = maxdist - td;
 114                                 for (s = 0;s < smax;s++)
 115                                 {
 116                                         if (sdtable[s] < maxdist2)
 117                                         {
 118                                                 k = dlightdivtable[(sdtable[s] + td) >> 7] - subtract;
 119                                                 if (k > 0)
 120                                                 {
 121                                                         bl[0] += (red   * k);
 122                                                         bl[1] += (green * k);
 123                                                         bl[2] += (blue  * k);
 124                                                         lit = true;
 125                                                 }
 126                                         }
 127                                         bl += 3;
 128                                 }
 129                         }
 130                         else // skip line
 131                                 bl += smax3;
 132                 }
 133         }
 134         return lit;
 135 }
 136
 137 static int R_FloatAddDynamicLights (const matrix4x4_t *matrix, msurface_t *surf)
 138 {
 139         int lnum, s, t, smax, tmax, smax3, lit, impacts, impactt;
 140         float sdtable[256], *bl, k, dist, dist2, maxdist, maxdist2, maxdist3, td1, td, red, green, blue, impact[3], local[3], subtract;
 141
 142         lit = false;
 143
 144         smax = (surf->extents[0] >> 4) + 1;
 145         tmax = (surf->extents[1] >> 4) + 1;
 146         smax3 = smax * 3;
 147
 148         for (lnum = 0; lnum < r_numdlights; lnum++)
 149         {
 150                 if (!(surf->dlightbits[lnum >> 5] & (1 << (lnum & 31))))
 151                         continue;                                       // not lit by this light
 152
 153                 Matrix4x4_Transform(matrix, r_dlight[lnum].origin, local);
 154                 dist = DotProduct (local, surf->plane->normal) - surf->plane->dist;
 155
 156                 // for comparisons to minimum acceptable light
 157                 // compensate for LIGHTOFFSET
 158                 maxdist = (int) r_dlight[lnum].cullradius2 + LIGHTOFFSET;
 159
 160                 dist2 = dist * dist;
 161                 dist2 += LIGHTOFFSET;
 162                 if (dist2 >= maxdist)
 163                         continue;
 164
 165                 if (surf->plane->type < 3)
 166                 {
 167                         VectorCopy(local, impact);
 168                         impact[surf->plane->type] -= dist;
 169                 }
 170                 else
 171                 {
 172                         impact[0] = local[0] - surf->plane->normal[0] * dist;
 173                         impact[1] = local[1] - surf->plane->normal[1] * dist;
 174                         impact[2] = local[2] - surf->plane->normal[2] * dist;
 175                 }
 176
 177                 impacts = DotProduct (impact, surf->texinfo->vecs[0]) + surf->texinfo->vecs[0][3] - surf->texturemins[0];
 178                 impactt = DotProduct (impact, surf->texinfo->vecs[1]) + surf->texinfo->vecs[1][3] - surf->texturemins[1];
 179
 180                 td = bound(0, impacts, smax * 16) - impacts;
 181                 td1 = bound(0, impactt, tmax * 16) - impactt;
 182                 td = td * td + td1 * td1 + dist2;
 183                 if (td > maxdist)
 184                         continue;
 185
 186                 // reduce calculations
 187                 for (s = 0, td1 = impacts; s < smax; s++, td1 -= 16.0f)
 188                         sdtable[s] = td1 * td1 + dist2;
 189
 190                 maxdist3 = maxdist - dist2;
 191
 192                 // convert to 8.8 blocklights format
 193                 red = r_dlight[lnum].light[0];
 194                 green = r_dlight[lnum].light[1];
 195                 blue = r_dlight[lnum].light[2];
 196                 subtract = r_dlight[lnum].subtract * 32768.0f;
 197                 bl = floatblocklights;
 198
 199                 td1 = impactt;
 200                 for (t = 0;t < tmax;t++, td1 -= 16.0f)
 201                 {
 202                         td = td1 * td1;
 203                         // make sure some part of it is visible on this line
 204                         if (td < maxdist3)
 205                         {
 206                                 maxdist2 = maxdist - td;
 207                                 for (s = 0;s < smax;s++)
 208                                 {
 209                                         if (sdtable[s] < maxdist2)
 210                                         {
 211                                                 k = (32768.0f / (sdtable[s] + td)) - subtract;
 212                                                 bl[0] += red   * k;
 213                                                 bl[1] += green * k;
 214                                                 bl[2] += blue  * k;
 215                                                 lit = true;
 216                                         }
 217                                         bl += 3;
 218                                 }
 219                         }
 220                         else // skip line
 221                                 bl += smax3;
 222                 }
 223         }
 224         return lit;
 225 }
 226
 227 /*
 228 ===============
 229 R_BuildLightMap
 230
 231 Combine and scale multiple lightmaps into the 8.8 format in blocklights
 232 ===============
 233 */
 234 static void R_BuildLightMap (const entity_render_t *ent, msurface_t *surf)
 235 {
 236         if (!r_floatbuildlightmap.integer)
 237         {
 238                 int smax, tmax, i, j, size, size3, shift, maps, stride, l;
 239                 unsigned int *bl, scale;
 240                 qbyte *lightmap, *out, *stain;
 241
 242                 // update cached lighting info
 243                 surf->cached_dlight = 0;
 244
 245                 smax = (surf->extents[0]>>4)+1;
 246                 tmax = (surf->extents[1]>>4)+1;
 247                 size = smax*tmax;
 248                 size3 = size*3;
 249                 lightmap = surf->samples;
 250
 251         // set to full bright if no light data
 252                 bl = intblocklights;
 253                 if ((ent->effects & EF_FULLBRIGHT) || !ent->model->lightdata)
 254                 {
 255                         for (i = 0;i < size3;i++)
 256                                 bl[i] = 255*256;
 257                 }
 258                 else
 259                 {
 260         // clear to no light
 261                         j = r_ambient.value * 512.0f; // would be 128.0f logically, but using 512.0f to match winquake style
 262                         if (j)
 263                         {
 264                                 for (i = 0;i < size3;i++)
 265                                         *bl++ = j;
 266                         }
 267                         else
 268                                 memset(bl, 0, size*3*sizeof(unsigned int));
 269
 270                         if (surf->dlightframe == r_framecount && r_dlightmap.integer)
 271                         {
 272                                 surf->cached_dlight = R_IntAddDynamicLights(&ent->inversematrix, surf);
 273                                 if (surf->cached_dlight)
 274                                         c_light_polys++;
 275                         }
 276
 277         // add all the lightmaps
 278                         if (lightmap)
 279                         {
 280                                 bl = intblocklights;
 281                                 for (maps = 0;maps < MAXLIGHTMAPS && surf->styles[maps] != 255;maps++, lightmap += size3)
 282                                         for (scale = d_lightstylevalue[surf->styles[maps]], i = 0;i < size3;i++)
 283                                                 bl[i] += lightmap[i] * scale;
 284                         }
 285                 }
 286
 287                 stain = surf->stainsamples;
 288                 bl = intblocklights;
 289                 out = templight;
 290                 // deal with lightmap brightness scale
 291                 shift = 7 + r_lightmapscalebit + 8;
 292                 if (ent->model->lightmaprgba)
 293                 {
 294                         stride = (surf->lightmaptexturestride - smax) * 4;
 295                         for (i = 0;i < tmax;i++, out += stride)
 296                         {
 297                                 for (j = 0;j < smax;j++)
 298                                 {
 299                                         l = (*bl++ * *stain++) >> shift;*out++ = min(l, 255);
 300                                         l = (*bl++ * *stain++) >> shift;*out++ = min(l, 255);
 301                                         l = (*bl++ * *stain++) >> shift;*out++ = min(l, 255);
 302                                         *out++ = 255;
 303                                 }
 304                         }
 305                 }
 306                 else
 307                 {
 308                         stride = (surf->lightmaptexturestride - smax) * 3;
 309                         for (i = 0;i < tmax;i++, out += stride)
 310                         {
 311                                 for (j = 0;j < smax;j++)
 312                                 {
 313                                         l = (*bl++ * *stain++) >> shift;*out++ = min(l, 255);
 314                                         l = (*bl++ * *stain++) >> shift;*out++ = min(l, 255);
 315                                         l = (*bl++ * *stain++) >> shift;*out++ = min(l, 255);
 316                                 }
 317                         }
 318                 }
 319
 320                 R_UpdateTexture(surf->lightmaptexture, templight);
 321         }
 322         else
 323         {
 324                 int smax, tmax, i, j, size, size3, maps, stride, l;
 325                 float *bl, scale;
 326                 qbyte *lightmap, *out, *stain;
 327
 328                 // update cached lighting info
 329                 surf->cached_dlight = 0;
 330
 331                 smax = (surf->extents[0]>>4)+1;
 332                 tmax = (surf->extents[1]>>4)+1;
 333                 size = smax*tmax;
 334                 size3 = size*3;
 335                 lightmap = surf->samples;
 336
 337         // set to full bright if no light data
 338                 bl = floatblocklights;
 339                 if ((ent->effects & EF_FULLBRIGHT) || !ent->model->lightdata)
 340                         j = 255*256;
 341                 else
 342                         j = r_ambient.value * 512.0f; // would be 128.0f logically, but using 512.0f to match winquake style
 343
 344                 // clear to no light
 345                 if (j)
 346                 {
 347                         for (i = 0;i < size3;i++)
 348                                 *bl++ = j;
 349                 }
 350                 else
 351                         memset(bl, 0, size*3*sizeof(float));
 352
 353                 if (surf->dlightframe == r_framecount && r_dlightmap.integer)
 354                 {
 355                         surf->cached_dlight = R_FloatAddDynamicLights(&ent->inversematrix, surf);
 356                         if (surf->cached_dlight)
 357                                 c_light_polys++;
 358                 }
 359
 360                 // add all the lightmaps
 361                 if (lightmap)
 362                 {
 363                         bl = floatblocklights;
 364                         for (maps = 0;maps < MAXLIGHTMAPS && surf->styles[maps] != 255;maps++, lightmap += size3)
 365                                 for (scale = d_lightstylevalue[surf->styles[maps]], i = 0;i < size3;i++)
 366                                         bl[i] += lightmap[i] * scale;
 367                 }
 368
 369                 stain = surf->stainsamples;
 370                 bl = floatblocklights;
 371                 out = templight;
 372                 // deal with lightmap brightness scale
 373                 scale = 1.0f / (1 << (7 + r_lightmapscalebit + 8));
 374                 if (ent->model->lightmaprgba)
 375                 {
 376                         stride = (surf->lightmaptexturestride - smax) * 4;
 377                         for (i = 0;i < tmax;i++, out += stride)
 378                         {
 379                                 for (j = 0;j < smax;j++)
 380                                 {
 381                                         l = *bl++ * *stain++ * scale;*out++ = min(l, 255);
 382                                         l = *bl++ * *stain++ * scale;*out++ = min(l, 255);
 383                                         l = *bl++ * *stain++ * scale;*out++ = min(l, 255);
 384                                         *out++ = 255;
 385                                 }
 386                         }
 387                 }
 388                 else
 389                 {
 390                         stride = (surf->lightmaptexturestride - smax) * 3;
 391                         for (i = 0;i < tmax;i++, out += stride)
 392                         {
 393                                 for (j = 0;j < smax;j++)
 394                                 {
 395                                         l = *bl++ * *stain++ * scale;*out++ = min(l, 255);
 396                                         l = *bl++ * *stain++ * scale;*out++ = min(l, 255);
 397                                         l = *bl++ * *stain++ * scale;*out++ = min(l, 255);
 398                                 }
 399                         }
 400                 }
 401
 402                 R_UpdateTexture(surf->lightmaptexture, templight);
 403         }
 404 }
 405
 406 void R_StainNode (mnode_t *node, model_t *model, const vec3_t origin, float radius, const float fcolor[8])
 407 {
 408         float ndist, a, ratio, maxdist, maxdist2, maxdist3, invradius, sdtable[256], td, dist2;
 409         msurface_t *surf, *endsurf;
 410         int i, s, t, smax, tmax, smax3, impacts, impactt, stained;
 411         qbyte *bl;
 412         vec3_t impact;
 413
 414         maxdist = radius * radius;
 415         invradius = 1.0f / radius;
 416
 417 loc0:
 418         if (node->contents < 0)
 419                 return;
 420         ndist = PlaneDiff(origin, node->plane);
 421         if (ndist > radius)
 422         {
 423                 node = node->children[0];
 424                 goto loc0;
 425         }
 426         if (ndist < -radius)
 427         {
 428                 node = node->children[1];
 429                 goto loc0;
 430         }
 431
 432         dist2 = ndist * ndist;
 433         maxdist3 = maxdist - dist2;
 434
 435         if (node->plane->type < 3)
 436         {
 437                 VectorCopy(origin, impact);
 438                 impact[node->plane->type] -= ndist;
 439         }
 440         else
 441         {
 442                 impact[0] = origin[0] - node->plane->normal[0] * ndist;
 443                 impact[1] = origin[1] - node->plane->normal[1] * ndist;
 444                 impact[2] = origin[2] - node->plane->normal[2] * ndist;
 445         }
 446
 447         for (surf = model->surfaces + node->firstsurface, endsurf = surf + node->numsurfaces;surf < endsurf;surf++)
 448         {
 449                 if (surf->stainsamples)
 450                 {
 451                         smax = (surf->extents[0] >> 4) + 1;
 452                         tmax = (surf->extents[1] >> 4) + 1;
 453
 454                         impacts = DotProduct (impact, surf->texinfo->vecs[0]) + surf->texinfo->vecs[0][3] - surf->texturemins[0];
 455                         impactt = DotProduct (impact, surf->texinfo->vecs[1]) + surf->texinfo->vecs[1][3] - surf->texturemins[1];
 456
 457                         s = bound(0, impacts, smax * 16) - impacts;
 458                         t = bound(0, impactt, tmax * 16) - impactt;
 459                         i = s * s + t * t + dist2;
 460                         if (i > maxdist)
 461                                 continue;
 462
 463                         // reduce calculations
 464                         for (s = 0, i = impacts; s < smax; s++, i -= 16)
 465                                 sdtable[s] = i * i + dist2;
 466
 467                         bl = surf->stainsamples;
 468                         smax3 = smax * 3;
 469                         stained = false;
 470
 471                         i = impactt;
 472                         for (t = 0;t < tmax;t++, i -= 16)
 473                         {
 474                                 td = i * i;
 475                                 // make sure some part of it is visible on this line
 476                                 if (td < maxdist3)
 477                                 {
 478                                         maxdist2 = maxdist - td;
 479                                         for (s = 0;s < smax;s++)
 480                                         {
 481                                                 if (sdtable[s] < maxdist2)
 482                                                 {
 483                                                         ratio = lhrandom(0.0f, 1.0f);
 484                                                         a = (fcolor[3] + ratio * fcolor[7]) * (1.0f - sqrt(sdtable[s] + td) * invradius);
 485                                                         if (a >= (1.0f / 64.0f))
 486                                                         {
 487                                                                 if (a > 1)
 488                                                                         a = 1;
 489                                                                 bl[0] = (qbyte) ((float) bl[0] + a * ((fcolor[0] + ratio * fcolor[4]) - (float) bl[0]));
 490                                                                 bl[1] = (qbyte) ((float) bl[1] + a * ((fcolor[1] + ratio * fcolor[5]) - (float) bl[1]));
 491                                                                 bl[2] = (qbyte) ((float) bl[2] + a * ((fcolor[2] + ratio * fcolor[6]) - (float) bl[2]));
 492                                                                 stained = true;
 493                                                         }
 494                                                 }
 495                                                 bl += 3;
 496                                         }
 497                                 }
 498                                 else // skip line
 499                                         bl += smax3;
 500                         }
 501                         // force lightmap upload
 502                         if (stained)
 503                                 surf->cached_dlight = true;
 504                 }
 505         }
 506
 507         if (node->children[0]->contents >= 0)
 508         {
 509                 if (node->children[1]->contents >= 0)
 510                 {
 511                         R_StainNode(node->children[0], model, origin, radius, fcolor);
 512                         node = node->children[1];
 513                         goto loc0;
 514                 }
 515                 else
 516                 {
 517                         node = node->children[0];
 518                         goto loc0;
 519                 }
 520         }
 521         else if (node->children[1]->contents >= 0)
 522         {
 523                 node = node->children[1];
 524                 goto loc0;
 525         }
 526 }
 527
 528 void R_Stain (const vec3_t origin, float radius, int cr1, int cg1, int cb1, int ca1, int cr2, int cg2, int cb2, int ca2)
 529 {
 530         int n;
 531         float fcolor[8];
 532         entity_render_t *ent;
 533         model_t *model;
 534         vec3_t org;
 535         fcolor[0] = cr1;
 536         fcolor[1] = cg1;
 537         fcolor[2] = cb1;
 538         fcolor[3] = ca1 * (1.0f / 64.0f);
 539         fcolor[4] = cr2 - cr1;
 540         fcolor[5] = cg2 - cg1;
 541         fcolor[6] = cb2 - cb1;
 542         fcolor[7] = (ca2 - ca1) * (1.0f / 64.0f);
 543
 544         model = cl.worldmodel;
 545         if (model)
 546                 R_StainNode(model->nodes + model->hulls[0].firstclipnode, model, origin, radius, fcolor);
 547
 548         // look for embedded bmodels
 549         for (n = 0;n < cl_num_brushmodel_entities;n++)
 550         {
 551                 ent = cl_brushmodel_entities[n];
 552                 model = ent->model;
 553                 if (model && model->name[0] == '*')
 554                 {
 555                         Mod_CheckLoaded(model);
 556                         if (model->type == mod_brush)
 557                         {
 558                                 Matrix4x4_Transform(&ent->inversematrix, origin, org);
 559                                 R_StainNode(model->nodes + model->hulls[0].firstclipnode, model, org, radius, fcolor);
 560                         }
 561                 }
 562         }
 563 }
 564
 565
 566 /*
 567 =============================================================
 568
 569         BRUSH MODELS
 570
 571 =============================================================
 572 */
 573
 574 static void RSurf_AddLightmapToVertexColors(const int *lightmapoffsets, float *c, int numverts, const qbyte *samples, int size3, const qbyte *styles)
 575 {
 576         int i;
 577         float scale;
 578         const qbyte *lm;
 579         if (styles[0] != 255)
 580         {
 581                 for (i = 0;i < numverts;i++, c += 4)
 582                 {
 583                         lm = samples + lightmapoffsets[i];
 584                         scale = d_lightstylevalue[styles[0]] * (1.0f / 32768.0f);
 585                         VectorMA(c, scale, lm, c);
 586                         if (styles[1] != 255)
 587                         {
 588                                 lm += size3;
 589                                 scale = d_lightstylevalue[styles[1]] * (1.0f / 32768.0f);
 590                                 VectorMA(c, scale, lm, c);
 591                                 if (styles[2] != 255)
 592                                 {
 593                                         lm += size3;
 594                                         scale = d_lightstylevalue[styles[2]] * (1.0f / 32768.0f);
 595                                         VectorMA(c, scale, lm, c);
 596                                         if (styles[3] != 255)
 597                                         {
 598                                                 lm += size3;
 599                                                 scale = d_lightstylevalue[styles[3]] * (1.0f / 32768.0f);
 600                                                 VectorMA(c, scale, lm, c);
 601                                         }
 602                                 }
 603                         }
 604                 }
 605         }
 606 }
 607
 608 static void RSurf_FogColors(const float *v, float *c, float colorscale, int numverts, const float *modelorg)
 609 {
 610         int i;
 611         float diff[3], f;
 612         if (fogenabled)
 613         {
 614                 for (i = 0;i < numverts;i++, v += 4, c += 4)
 615                 {
 616                         VectorSubtract(v, modelorg, diff);
 617                         f = colorscale * (1 - exp(fogdensity/DotProduct(diff, diff)));
 618                         VectorScale(c, f, c);
 619                 }
 620         }
 621         else if (colorscale != 1)
 622                 for (i = 0;i < numverts;i++, c += 4)
 623                         VectorScale(c, colorscale, c);
 624 }
 625
 626 static void RSurf_FoggedColors(const float *v, float *c, float r, float g, float b, float a, float colorscale, int numverts, const float *modelorg)
 627 {
 628         int i;
 629         float diff[3], f;
 630         r *= colorscale;
 631         g *= colorscale;
 632         b *= colorscale;
 633         if (fogenabled)
 634         {
 635                 for (i = 0;i < numverts;i++, v += 4, c += 4)
 636                 {
 637                         VectorSubtract(v, modelorg, diff);
 638                         f = 1 - exp(fogdensity/DotProduct(diff, diff));
 639                         c[0] = r * f;
 640                         c[1] = g * f;
 641                         c[2] = b * f;
 642                         c[3] = a;
 643                 }
 644         }
 645         else
 646         {
 647                 for (i = 0;i < numverts;i++, c += 4)
 648                 {
 649                         c[0] = r;
 650                         c[1] = g;
 651                         c[2] = b;
 652                         c[3] = a;
 653                 }
 654         }
 655 }
 656
 657 static void RSurf_FogPassColors(const float *v, float *c, float r, float g, float b, float a, float colorscale, int numverts, const float *modelorg)
 658 {
 659         int i;
 660         float diff[3], f;
 661         r *= colorscale;
 662         g *= colorscale;
 663         b *= colorscale;
 664         for (i = 0;i < numverts;i++, v += 4, c += 4)
 665         {
 666                 VectorSubtract(v, modelorg, diff);
 667                 f = exp(fogdensity/DotProduct(diff, diff));
 668                 c[0] = r;
 669                 c[1] = g;
 670                 c[2] = b;
 671                 c[3] = a * f;
 672         }
 673 }
 674
 675 static void RSurf_ScaleColors(float *c, float scale, int numverts)
 676 {
 677         int i;
 678         if (scale != 1)
 679                 for (i = 0;i < numverts;i++, c += 4)
 680                         VectorScale(c, scale, c);
 681 }
 682
 683 static int RSurf_LightSeparate(const matrix4x4_t *matrix, const int *dlightbits, int numverts, const float *vert, float *color)
 684 {
 685         float f;
 686         const float *v;
 687         float *c;
 688         int i, l, lit = false;
 689         const rdlight_t *rd;
 690         vec3_t lightorigin;
 691         for (l = 0;l < r_numdlights;l++)
 692         {
 693                 if (dlightbits[l >> 5] & (1 << (l & 31)))
 694                 {
 695                         rd = &r_dlight[l];
 696                         Matrix4x4_Transform(matrix, rd->origin, lightorigin);
 697                         for (i = 0, v = vert, c = color;i < numverts;i++, v += 4, c += 4)
 698                         {
 699                                 f = VectorDistance2(v, lightorigin) + LIGHTOFFSET;
 700                                 if (f < rd->cullradius2)
 701                                 {
 702                                         f = (1.0f / f) - rd->subtract;
 703                                         VectorMA(c, f, rd->light, c);
 704                                         lit = true;
 705                                 }
 706                         }
 707                 }
 708         }
 709         return lit;
 710 }
 711
 712 // note: this untransforms lights to do the checking,
 713 // and takes surf->mesh->verts data
 714 static int RSurf_LightCheck(const matrix4x4_t *matrix, const int *dlightbits, const surfmesh_t *mesh)
 715 {
 716         int i, l;
 717         const rdlight_t *rd;
 718         vec3_t lightorigin;
 719         const float *v;
 720         for (l = 0;l < r_numdlights;l++)
 721         {
 722                 if (dlightbits[l >> 5] & (1 << (l & 31)))
 723                 {
 724                         rd = &r_dlight[l];
 725                         Matrix4x4_Transform(matrix, rd->origin, lightorigin);
 726                         for (i = 0, v = mesh->verts;i < mesh->numverts;i++, v += 4)
 727                                 if (VectorDistance2(v, lightorigin) < rd->cullradius2)
 728                                         return true;
 729                 }
 730         }
 731         return false;
 732 }
 733
 734 static void RSurfShader_Sky(const entity_render_t *ent, const texture_t *texture, msurface_t **surfchain)
 735 {
 736         const msurface_t *surf;
 737         const surfmesh_t *mesh;
 738         rmeshstate_t m;
 739
 740         // LordHavoc: HalfLife maps have freaky skypolys...
 741         if (ent->model->ishlbsp)
 742                 return;
 743
 744         if (skyrendernow)
 745         {
 746                 skyrendernow = false;
 747                 if (skyrendermasked)
 748                         R_Sky();
 749         }
 750
 751         R_Mesh_Matrix(&ent->matrix);
 752
 753         // draw depth-only polys
 754         memset(&m, 0, sizeof(m));
 755         if (skyrendermasked)
 756         {
 757                 qglColorMask(0,0,0,0);
 758                 // just to make sure that braindead drivers don't draw anything
 759                 // despite that colormask...
 760                 m.blendfunc1 = GL_ZERO;
 761                 m.blendfunc2 = GL_ONE;
 762         }
 763         else
 764         {
 765                 // fog sky
 766                 m.blendfunc1 = GL_ONE;
 767                 m.blendfunc2 = GL_ZERO;
 768         }
 769         m.depthwrite = true;
 770         R_Mesh_State(&m);
 771         while((surf = *surfchain++) != NULL)
 772         {
 773                 if (surf->visframe == r_framecount)
 774                 {
 775                         for (mesh = surf->mesh;mesh;mesh = mesh->chain)
 776                         {
 777                                 R_Mesh_ResizeCheck(mesh->numverts);
 778                                 memcpy(varray_vertex, mesh->verts, mesh->numverts * sizeof(float[4]));
 779                                 GL_Color(fogcolor[0] * r_colorscale, fogcolor[1] * r_colorscale, fogcolor[2] * r_colorscale, 1);
 780                                 R_Mesh_Draw(mesh->numverts, mesh->numtriangles, mesh->index);
 781                         }
 782                 }
 783         }
 784         qglColorMask(1,1,1,1);
 785 }
 786
 787 static void RSurfShader_Water_Callback(const void *calldata1, int calldata2)
 788 {
 789         const entity_render_t *ent = calldata1;
 790         const msurface_t *surf = ent->model->surfaces + calldata2;
 791         float f, colorscale;
 792         const surfmesh_t *mesh;
 793         rmeshstate_t m;
 794         float alpha;
 795         float modelorg[3];
 796         texture_t *texture;
 797         Matrix4x4_Transform(&ent->inversematrix, r_origin, modelorg);
 798
 799         R_Mesh_Matrix(&ent->matrix);
 800
 801         memset(&m, 0, sizeof(m));
 802         texture = surf->texinfo->texture->currentframe;
 803         alpha = texture->currentalpha;
 804         if (texture->rendertype == SURFRENDER_ADD)
 805         {
 806                 m.blendfunc1 = GL_SRC_ALPHA;
 807                 m.blendfunc2 = GL_ONE;
 808         }
 809         else if (texture->rendertype == SURFRENDER_ALPHA)
 810         {
 811                 m.blendfunc1 = GL_SRC_ALPHA;
 812                 m.blendfunc2 = GL_ONE_MINUS_SRC_ALPHA;
 813         }
 814         else
 815         {
 816                 m.blendfunc1 = GL_ONE;
 817                 m.blendfunc2 = GL_ZERO;
 818         }
 819         m.tex[0] = R_GetTexture(texture->texture);
 820         colorscale = r_colorscale;
 821         if (gl_combine.integer)
 822         {
 823                 m.texrgbscale[0] = 4;
 824                 colorscale *= 0.25f;
 825         }
 826         R_Mesh_State(&m);
 827         GL_UseColorArray();
 828         for (mesh = surf->mesh;mesh;mesh = mesh->chain)
 829         {
 830                 R_Mesh_ResizeCheck(mesh->numverts);
 831                 memcpy(varray_vertex, mesh->verts, mesh->numverts * sizeof(float[4]));
 832                 memcpy(varray_texcoord[0], mesh->str, mesh->numverts * sizeof(float[4]));
 833                 f = surf->flags & SURF_DRAWFULLBRIGHT ? 1.0f : ((surf->flags & SURF_LIGHTMAP) ? 0 : 0.5f);
 834                 R_FillColors(varray_color, mesh->numverts, f, f, f, alpha);
 835                 if (!(surf->flags & SURF_DRAWFULLBRIGHT || ent->effects & EF_FULLBRIGHT))
 836                 {
 837                         if (surf->dlightframe == r_framecount)
 838                                 RSurf_LightSeparate(&ent->inversematrix, surf->dlightbits, mesh->numverts, varray_vertex, varray_color);
 839                         if (surf->flags & SURF_LIGHTMAP)
 840                                 RSurf_AddLightmapToVertexColors(mesh->lightmapoffsets, varray_color, mesh->numverts, surf->samples, ((surf->extents[0]>>4)+1)*((surf->extents[1]>>4)+1)*3, surf->styles);
 841                 }
 842                 RSurf_FogColors(varray_vertex, varray_color, colorscale, mesh->numverts, modelorg);
 843                 R_Mesh_Draw(mesh->numverts, mesh->numtriangles, mesh->index);
 844         }
 845
 846         if (fogenabled)
 847         {
 848                 memset(&m, 0, sizeof(m));
 849                 m.blendfunc1 = GL_SRC_ALPHA;
 850                 m.blendfunc2 = GL_ONE;
 851                 m.tex[0] = R_GetTexture(texture->fogtexture);
 852                 R_Mesh_State(&m);
 853                 for (mesh = surf->mesh;mesh;mesh = mesh->chain)
 854                 {
 855                         R_Mesh_ResizeCheck(mesh->numverts);
 856                         memcpy(varray_vertex, mesh->verts, mesh->numverts * sizeof(float[4]));
 857                         if (m.tex[0])
 858                                 memcpy(varray_texcoord[0], mesh->str, mesh->numverts * sizeof(float[4]));
 859                         RSurf_FogPassColors(varray_vertex, varray_color, fogcolor[0], fogcolor[1], fogcolor[2], alpha, r_colorscale, mesh->numverts, modelorg);
 860                         R_Mesh_Draw(mesh->numverts, mesh->numtriangles, mesh->index);
 861                 }
 862         }
 863 }
 864
 865 static void RSurfShader_Water(const entity_render_t *ent, const texture_t *texture, msurface_t **surfchain)
 866 {
 867         const msurface_t *surf;
 868         msurface_t **chain;
 869         vec3_t center;
 870         if (texture->rendertype != SURFRENDER_OPAQUE)
 871         {
 872                 for (chain = surfchain;(surf = *chain) != NULL;chain++)
 873                 {
 874                         if (surf->visframe == r_framecount)
 875                         {
 876                                 Matrix4x4_Transform(&ent->matrix, surf->poly_center, center);
 877                                 R_MeshQueue_AddTransparent(center, RSurfShader_Water_Callback, ent, surf - ent->model->surfaces);
 878                         }
 879                 }
 880         }
 881         else
 882                 for (chain = surfchain;(surf = *chain) != NULL;chain++)
 883                         if (surf->visframe == r_framecount)
 884                                 RSurfShader_Water_Callback(ent, surf - ent->model->surfaces);
 885 }
 886
 887 static void RSurfShader_Wall_Pass_BaseVertex(const entity_render_t *ent, const msurface_t *surf, const texture_t *texture, int rendertype, float currentalpha)
 888 {
 889         float base, colorscale;
 890         const surfmesh_t *mesh;
 891         rmeshstate_t m;
 892         float modelorg[3];
 893         Matrix4x4_Transform(&ent->inversematrix, r_origin, modelorg);
 894         memset(&m, 0, sizeof(m));
 895         if (rendertype == SURFRENDER_ADD)
 896         {
 897                 m.blendfunc1 = GL_SRC_ALPHA;
 898                 m.blendfunc2 = GL_ONE;
 899         }
 900         else if (rendertype == SURFRENDER_ALPHA)
 901         {
 902                 m.blendfunc1 = GL_SRC_ALPHA;
 903                 m.blendfunc2 = GL_ONE_MINUS_SRC_ALPHA;
 904         }
 905         else
 906         {
 907                 m.blendfunc1 = GL_ONE;
 908                 m.blendfunc2 = GL_ZERO;
 909         }
 910         m.tex[0] = R_GetTexture(texture->texture);
 911         colorscale = r_colorscale;
 912         if (gl_combine.integer)
 913         {
 914                 m.texrgbscale[0] = 4;
 915                 colorscale *= 0.25f;
 916         }
 917         base = ent->effects & EF_FULLBRIGHT ? 2.0f : r_ambient.value * (1.0f / 64.0f);
 918         R_Mesh_State(&m);
 919         GL_UseColorArray();
 920         for (mesh = surf->mesh;mesh;mesh = mesh->chain)
 921         {
 922                 R_Mesh_ResizeCheck(mesh->numverts);
 923                 memcpy(varray_vertex, mesh->verts, mesh->numverts * sizeof(float[4]));
 924                 memcpy(varray_texcoord[0], mesh->str, mesh->numverts * sizeof(float[4]));
 925                 R_FillColors(varray_color, mesh->numverts, base, base, base, currentalpha);
 926                 if (!(ent->effects & EF_FULLBRIGHT))
 927                 {
 928                         if (surf->dlightframe == r_framecount)
 929                                 RSurf_LightSeparate(&ent->inversematrix, surf->dlightbits, mesh->numverts, varray_vertex, varray_color);
 930                         if (surf->flags & SURF_LIGHTMAP)
 931                                 RSurf_AddLightmapToVertexColors(mesh->lightmapoffsets, varray_color, mesh->numverts, surf->samples, ((surf->extents[0]>>4)+1)*((surf->extents[1]>>4)+1)*3, surf->styles);
 932                 }
 933                 RSurf_FogColors(varray_vertex, varray_color, colorscale, mesh->numverts, modelorg);
 934                 R_Mesh_Draw(mesh->numverts, mesh->numtriangles, mesh->index);
 935         }
 936 }
 937
 938 static void RSurfShader_Wall_Pass_Glow(const entity_render_t *ent, const msurface_t *surf, const texture_t *texture, int rendertype, float currentalpha)
 939 {
 940         const surfmesh_t *mesh;
 941         rmeshstate_t m;
 942         float modelorg[3];
 943         Matrix4x4_Transform(&ent->inversematrix, r_origin, modelorg);
 944         memset(&m, 0, sizeof(m));
 945         m.blendfunc1 = GL_SRC_ALPHA;
 946         m.blendfunc2 = GL_ONE;
 947         m.tex[0] = R_GetTexture(texture->glowtexture);
 948         R_Mesh_State(&m);
 949         GL_UseColorArray();
 950         for (mesh = surf->mesh;mesh;mesh = mesh->chain)
 951         {
 952                 R_Mesh_ResizeCheck(mesh->numverts);
 953                 memcpy(varray_vertex, mesh->verts, mesh->numverts * sizeof(float[4]));
 954                 memcpy(varray_texcoord[0], mesh->str, mesh->numverts * sizeof(float[4]));
 955                 RSurf_FoggedColors(varray_vertex, varray_color, 1, 1, 1, currentalpha, r_colorscale, mesh->numverts, modelorg);
 956                 R_Mesh_Draw(mesh->numverts, mesh->numtriangles, mesh->index);
 957         }
 958 }
 959
 960 static void RSurfShader_Wall_Pass_Fog(const entity_render_t *ent, const msurface_t *surf, const texture_t *texture, int rendertype, float currentalpha)
 961 {
 962         const surfmesh_t *mesh;
 963         rmeshstate_t m;
 964         float modelorg[3];
 965         Matrix4x4_Transform(&ent->inversematrix, r_origin, modelorg);
 966         memset(&m, 0, sizeof(m));
 967         m.blendfunc1 = GL_SRC_ALPHA;
 968         m.blendfunc2 = GL_ONE;
 969         m.tex[0] = R_GetTexture(texture->fogtexture);
 970         R_Mesh_State(&m);
 971         GL_UseColorArray();
 972         for (mesh = surf->mesh;mesh;mesh = mesh->chain)
 973         {
 974                 R_Mesh_ResizeCheck(mesh->numverts);
 975                 memcpy(varray_vertex, mesh->verts, mesh->numverts * sizeof(float[4]));
 976                 if (m.tex[0])
 977                         memcpy(varray_texcoord[0], mesh->str, mesh->numverts * sizeof(float[4]));
 978                 RSurf_FogPassColors(varray_vertex, varray_color, fogcolor[0], fogcolor[1], fogcolor[2], currentalpha, r_colorscale, mesh->numverts, modelorg);
 979                 R_Mesh_Draw(mesh->numverts, mesh->numtriangles, mesh->index);
 980         }
 981 }
 982
 983 static void RSurfShader_OpaqueWall_Pass_BaseTripleTexCombine(const entity_render_t *ent, const texture_t *texture, msurface_t **surfchain)
 984 {
 985         const msurface_t *surf;
 986         const surfmesh_t *mesh;
 987         rmeshstate_t m;
 988         int lightmaptexturenum;
 989         float cl;
 990         memset(&m, 0, sizeof(m));
 991         m.blendfunc1 = GL_ONE;
 992         m.blendfunc2 = GL_ZERO;
 993         m.tex[0] = R_GetTexture(texture->texture);
 994         m.tex[1] = R_GetTexture((**surfchain).lightmaptexture);
 995         m.tex[2] = R_GetTexture(texture->detailtexture);
 996         m.texrgbscale[0] = 1;
 997         m.texrgbscale[1] = 4;
 998         m.texrgbscale[2] = 2;
 999         R_Mesh_State(&m);
1000         cl = (float) (1 << r_lightmapscalebit) * r_colorscale;
1001         GL_Color(cl, cl, cl, 1);
1002         while((surf = *surfchain++) != NULL)
1003         {
1004                 if (surf->visframe == r_framecount)
1005                 {
1006                         lightmaptexturenum = R_GetTexture(surf->lightmaptexture);
1007                         if (m.tex[1] != lightmaptexturenum)
1008                         {
1009                                 m.tex[1] = lightmaptexturenum;
1010                                 R_Mesh_State(&m);
1011                         }
1012                         for (mesh = surf->mesh;mesh;mesh = mesh->chain)
1013                         {
1014                                 R_Mesh_ResizeCheck(mesh->numverts);
1015                                 memcpy(varray_vertex, mesh->verts, mesh->numverts * sizeof(float[4]));
1016                                 memcpy(varray_texcoord[0], mesh->str, mesh->numverts * sizeof(float[4]));
1017                                 memcpy(varray_texcoord[1], mesh->uvw, mesh->numverts * sizeof(float[4]));
1018                                 memcpy(varray_texcoord[2], mesh->abc, mesh->numverts * sizeof(float[4]));
1019                                 R_Mesh_Draw(mesh->numverts, mesh->numtriangles, mesh->index);
1020                         }
1021                 }
1022         }
1023 }
1024
1025 static void RSurfShader_OpaqueWall_Pass_BaseDoubleTex(const entity_render_t *ent, const texture_t *texture, msurface_t **surfchain)
1026 {
1027         const msurface_t *surf;
1028         const surfmesh_t *mesh;
1029         rmeshstate_t m;
1030         int lightmaptexturenum;
1031         memset(&m, 0, sizeof(m));
1032         m.blendfunc1 = GL_ONE;
1033         m.blendfunc2 = GL_ZERO;
1034         m.tex[0] = R_GetTexture(texture->texture);
1035         m.tex[1] = R_GetTexture((**surfchain).lightmaptexture);
1036         if (gl_combine.integer)
1037                 m.texrgbscale[1] = 4;
1038         R_Mesh_State(&m);
1039         GL_Color(r_colorscale, r_colorscale, r_colorscale, 1);
1040         while((surf = *surfchain++) != NULL)
1041         {
1042                 if (surf->visframe == r_framecount)
1043                 {
1044                         lightmaptexturenum = R_GetTexture(surf->lightmaptexture);
1045                         if (m.tex[1] != lightmaptexturenum)
1046                         {
1047                                 m.tex[1] = lightmaptexturenum;
1048                                 R_Mesh_State(&m);
1049                         }
1050                         for (mesh = surf->mesh;mesh;mesh = mesh->chain)
1051                         {
1052                                 R_Mesh_ResizeCheck(mesh->numverts);
1053                                 memcpy(varray_vertex, mesh->verts, mesh->numverts * sizeof(float[4]));
1054                                 memcpy(varray_texcoord[0], mesh->str, mesh->numverts * sizeof(float[4]));
1055                                 memcpy(varray_texcoord[1], mesh->uvw, mesh->numverts * sizeof(float[4]));
1056                                 R_Mesh_Draw(mesh->numverts, mesh->numtriangles, mesh->index);
1057                         }
1058                 }
1059         }
1060 }
1061
1062 static void RSurfShader_OpaqueWall_Pass_BaseTexture(const entity_render_t *ent, const texture_t *texture, msurface_t **surfchain)
1063 {
1064         const msurface_t *surf;
1065         const surfmesh_t *mesh;
1066         rmeshstate_t m;
1067         memset(&m, 0, sizeof(m));
1068         m.blendfunc1 = GL_ONE;
1069         m.blendfunc2 = GL_ZERO;
1070         m.tex[0] = R_GetTexture(texture->texture);
1071         R_Mesh_State(&m);
1072         GL_Color(1, 1, 1, 1);
1073         while((surf = *surfchain++) != NULL)
1074         {
1075                 if (surf->visframe == r_framecount)
1076                 {
1077                         for (mesh = surf->mesh;mesh;mesh = mesh->chain)
1078                         {
1079                                 R_Mesh_ResizeCheck(mesh->numverts);
1080                                 memcpy(varray_vertex, mesh->verts, mesh->numverts * sizeof(float[4]));
1081                                 memcpy(varray_texcoord[0], mesh->str, mesh->numverts * sizeof(float[4]));
1082                                 R_Mesh_Draw(mesh->numverts, mesh->numtriangles, mesh->index);
1083                         }
1084                 }
1085         }
1086 }
1087
1088 static void RSurfShader_OpaqueWall_Pass_BaseLightmap(const entity_render_t *ent, const texture_t *texture, msurface_t **surfchain)
1089 {
1090         const msurface_t *surf;
1091         const surfmesh_t *mesh;
1092         rmeshstate_t m;
1093         int lightmaptexturenum;
1094         memset(&m, 0, sizeof(m));
1095         m.blendfunc1 = GL_ZERO;
1096         m.blendfunc2 = GL_SRC_COLOR;
1097         m.tex[0] = R_GetTexture((**surfchain).lightmaptexture);
1098         if (gl_combine.integer)
1099                 m.texrgbscale[0] = 4;
1100         R_Mesh_State(&m);
1101         GL_Color(r_colorscale, r_colorscale, r_colorscale, 1);
1102         while((surf = *surfchain++) != NULL)
1103         {
1104                 if (surf->visframe == r_framecount)
1105                 {
1106                         lightmaptexturenum = R_GetTexture(surf->lightmaptexture);
1107                         if (m.tex[0] != lightmaptexturenum)
1108                         {
1109                                 m.tex[0] = lightmaptexturenum;
1110                                 R_Mesh_State(&m);
1111                         }
1112                         for (mesh = surf->mesh;mesh;mesh = mesh->chain)
1113                         {
1114                                 R_Mesh_ResizeCheck(mesh->numverts);
1115                                 memcpy(varray_vertex, mesh->verts, mesh->numverts * sizeof(float[4]));
1116                                 memcpy(varray_texcoord[0], mesh->uvw, mesh->numverts * sizeof(float[4]));
1117                                 R_Mesh_Draw(mesh->numverts, mesh->numtriangles, mesh->index);
1118                         }
1119                 }
1120         }
1121 }
1122
1123 static void RSurfShader_OpaqueWall_Pass_Light(const entity_render_t *ent, const texture_t *texture, msurface_t **surfchain)
1124 {
1125         const msurface_t *surf;
1126         const surfmesh_t *mesh;
1127         float colorscale;
1128         rmeshstate_t m;
1129
1130         memset(&m, 0, sizeof(m));
1131         m.blendfunc1 = GL_SRC_ALPHA;
1132         m.blendfunc2 = GL_ONE;
1133         m.tex[0] = R_GetTexture(texture->texture);
1134         colorscale = r_colorscale;
1135         if (gl_combine.integer)
1136         {
1137                 m.texrgbscale[0] = 4;
1138                 colorscale *= 0.25f;
1139         }
1140         R_Mesh_State(&m);
1141         GL_UseColorArray();
1142         while((surf = *surfchain++) != NULL)
1143         {
1144                 if (surf->visframe == r_framecount && surf->dlightframe == r_framecount)
1145                 {
1146                         for (mesh = surf->mesh;mesh;mesh = mesh->chain)
1147                         {
1148                                 if (RSurf_LightCheck(&ent->inversematrix, surf->dlightbits, mesh))
1149                                 {
1150                                         R_Mesh_ResizeCheck(mesh->numverts);
1151                                         memcpy(varray_vertex, mesh->verts, mesh->numverts * sizeof(float[4]));
1152                                         memcpy(varray_texcoord[0], mesh->str, mesh->numverts * sizeof(float[4]));
1153                                         R_FillColors(varray_color, mesh->numverts, 0, 0, 0, 1);
1154                                         RSurf_LightSeparate(&ent->inversematrix, surf->dlightbits, mesh->numverts, varray_vertex, varray_color);
1155                                         RSurf_ScaleColors(varray_color, colorscale, mesh->numverts);
1156                                         R_Mesh_Draw(mesh->numverts, mesh->numtriangles, mesh->index);
1157                                 }
1158                         }
1159                 }
1160         }
1161 }
1162
1163 static void RSurfShader_OpaqueWall_Pass_Fog(const entity_render_t *ent, const texture_t *texture, msurface_t **surfchain)
1164 {
1165         const msurface_t *surf;
1166         const surfmesh_t *mesh;
1167         rmeshstate_t m;
1168         float modelorg[3];
1169         Matrix4x4_Transform(&ent->inversematrix, r_origin, modelorg);
1170         memset(&m, 0, sizeof(m));
1171         m.blendfunc1 = GL_SRC_ALPHA;
1172         m.blendfunc2 = GL_ONE_MINUS_SRC_ALPHA;
1173         R_Mesh_State(&m);
1174         GL_UseColorArray();
1175         while((surf = *surfchain++) != NULL)
1176         {
1177                 if (surf->visframe == r_framecount)
1178                 {
1179                         for (mesh = surf->mesh;mesh;mesh = mesh->chain)
1180                         {
1181                                 R_Mesh_ResizeCheck(mesh->numverts);
1182                                 memcpy(varray_vertex, mesh->verts, mesh->numverts * sizeof(float[4]));
1183                                 if (m.tex[0])
1184                                         memcpy(varray_texcoord[0], mesh->str, mesh->numverts * sizeof(float[4]));
1185                                 RSurf_FogPassColors(varray_vertex, varray_color, fogcolor[0], fogcolor[1], fogcolor[2], 1, r_colorscale, mesh->numverts, modelorg);
1186                                 R_Mesh_Draw(mesh->numverts, mesh->numtriangles, mesh->index);
1187                         }
1188                 }
1189         }
1190 }
1191
1192 static void RSurfShader_OpaqueWall_Pass_BaseDetail(const entity_render_t *ent, const texture_t *texture, msurface_t **surfchain)
1193 {
1194         const msurface_t *surf;
1195         const surfmesh_t *mesh;
1196         rmeshstate_t m;
1197         memset(&m, 0, sizeof(m));
1198         m.blendfunc1 = GL_DST_COLOR;
1199         m.blendfunc2 = GL_SRC_COLOR;
1200         m.tex[0] = R_GetTexture(texture->detailtexture);
1201         R_Mesh_State(&m);
1202         GL_Color(1, 1, 1, 1);
1203         while((surf = *surfchain++) != NULL)
1204         {
1205                 if (surf->visframe == r_framecount)
1206                 {
1207                         for (mesh = surf->mesh;mesh;mesh = mesh->chain)
1208                         {
1209                                 R_Mesh_ResizeCheck(mesh->numverts);
1210                                 memcpy(varray_vertex, mesh->verts, mesh->numverts * sizeof(float[4]));
1211                                 memcpy(varray_texcoord[0], mesh->abc, mesh->numverts * sizeof(float[4]));
1212                                 R_Mesh_Draw(mesh->numverts, mesh->numtriangles, mesh->index);
1213                         }
1214                 }
1215         }
1216 }
1217
1218 static void RSurfShader_OpaqueWall_Pass_Glow(const entity_render_t *ent, const texture_t *texture, msurface_t **surfchain)
1219 {
1220         const msurface_t *surf;
1221         const surfmesh_t *mesh;
1222         rmeshstate_t m;
1223         memset(&m, 0, sizeof(m));
1224         m.blendfunc1 = GL_SRC_ALPHA;
1225         m.blendfunc2 = GL_ONE;
1226         m.tex[0] = R_GetTexture(texture->glowtexture);
1227         R_Mesh_State(&m);
1228         GL_Color(r_colorscale, r_colorscale, r_colorscale, 1);
1229         while((surf = *surfchain++) != NULL)
1230         {
1231                 if (surf->visframe == r_framecount)
1232                 {
1233                         for (mesh = surf->mesh;mesh;mesh = mesh->chain)
1234                         {
1235                                 R_Mesh_ResizeCheck(mesh->numverts);
1236                                 memcpy(varray_vertex, mesh->verts, mesh->numverts * sizeof(float[4]));
1237                                 memcpy(varray_texcoord[0], mesh->str, mesh->numverts * sizeof(float[4]));
1238                                 R_Mesh_Draw(mesh->numverts, mesh->numtriangles, mesh->index);
1239                         }
1240                 }
1241         }
1242 }
1243
1244 static void RSurfShader_OpaqueWall_Pass_OpaqueGlow(const entity_render_t *ent, const texture_t *texture, msurface_t **surfchain)
1245 {
1246         const msurface_t *surf;
1247         const surfmesh_t *mesh;
1248         rmeshstate_t m;
1249         memset(&m, 0, sizeof(m));
1250         m.blendfunc1 = GL_SRC_ALPHA;
1251         m.blendfunc2 = GL_ZERO;
1252         m.tex[0] = R_GetTexture(texture->glowtexture);
1253         R_Mesh_State(&m);
1254         if (m.tex[0])
1255                 GL_Color(r_colorscale, r_colorscale, r_colorscale, 1);
1256         else
1257                 GL_Color(0, 0, 0, 1);
1258         while((surf = *surfchain++) != NULL)
1259         {
1260                 if (surf->visframe == r_framecount)
1261                 {
1262                         for (mesh = surf->mesh;mesh;mesh = mesh->chain)
1263                         {
1264                                 R_Mesh_ResizeCheck(mesh->numverts);
1265                                 memcpy(varray_vertex, mesh->verts, mesh->numverts * sizeof(float[4]));
1266                                 memcpy(varray_texcoord[0], mesh->str, mesh->numverts * sizeof(float[4]));
1267                                 R_Mesh_Draw(mesh->numverts, mesh->numtriangles, mesh->index);
1268                         }
1269                 }
1270         }
1271 }
1272
1273 static void RSurfShader_Wall_Vertex_Callback(const void *calldata1, int calldata2)
1274 {
1275         const entity_render_t *ent = calldata1;
1276         const msurface_t *surf = ent->model->surfaces + calldata2;
1277         int rendertype;
1278         float currentalpha;
1279         texture_t *texture;
1280         R_Mesh_Matrix(&ent->matrix);
1281
1282         texture = surf->texinfo->texture;
1283         if (texture->animated)
1284                 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];
1285
1286         currentalpha = ent->alpha;
1287         if (texture->flags & SURF_WATERALPHA)
1288                 currentalpha *= r_wateralpha.value;
1289         if (ent->effects & EF_ADDITIVE)
1290                 rendertype = SURFRENDER_ADD;
1291         else if (currentalpha < 1 || texture->fogtexture != NULL)
1292                 rendertype = SURFRENDER_ALPHA;
1293         else
1294                 rendertype = SURFRENDER_OPAQUE;
1295
1296         RSurfShader_Wall_Pass_BaseVertex(ent, surf, texture, rendertype, currentalpha);
1297         if (texture->glowtexture)
1298                 RSurfShader_Wall_Pass_Glow(ent, surf, texture, rendertype, currentalpha);
1299         if (fogenabled)
1300                 RSurfShader_Wall_Pass_Fog(ent, surf, texture, rendertype, currentalpha);
1301 }
1302
1303 static void RSurfShader_Wall_Lightmap(const entity_render_t *ent, const texture_t *texture, msurface_t **surfchain)
1304 {
1305         const msurface_t *surf;
1306         msurface_t **chain;
1307         vec3_t center;
1308         if (texture->rendertype != SURFRENDER_OPAQUE)
1309         {
1310                 // transparent vertex shaded from lightmap
1311                 for (chain = surfchain;(surf = *chain) != NULL;chain++)
1312                 {
1313                         if (surf->visframe == r_framecount)
1314                         {
1315                                 Matrix4x4_Transform(&ent->matrix, surf->poly_center, center);
1316                                 R_MeshQueue_AddTransparent(center, RSurfShader_Wall_Vertex_Callback, ent, surf - ent->model->surfaces);
1317                         }
1318                 }
1319         }
1320         else if (r_shadow_lightingmode >= 2)
1321         {
1322                 // opaque base lighting
1323                 RSurfShader_OpaqueWall_Pass_OpaqueGlow(ent, texture, surfchain);
1324                 if (fogenabled)
1325                         RSurfShader_OpaqueWall_Pass_Fog(ent, texture, surfchain);
1326         }
1327         else if (r_vertexsurfaces.integer)
1328         {
1329                 // opaque vertex shaded from lightmap
1330                 for (chain = surfchain;(surf = *chain) != NULL;chain++)
1331                         if (surf->visframe == r_framecount)
1332                                 RSurfShader_Wall_Pass_BaseVertex(ent, surf, texture, texture->rendertype, texture->currentalpha);
1333                 if (texture->glowtexture)
1334                         for (chain = surfchain;(surf = *chain) != NULL;chain++)
1335                                 if (surf->visframe == r_framecount)
1336                                         RSurfShader_Wall_Pass_Glow(ent, surf, texture, texture->rendertype, texture->currentalpha);
1337                 if (fogenabled)
1338                         for (chain = surfchain;(surf = *chain) != NULL;chain++)
1339                                 if (surf->visframe == r_framecount)
1340                                         RSurfShader_Wall_Pass_Fog(ent, surf, texture, texture->rendertype, texture->currentalpha);
1341         }
1342         else
1343         {
1344                 // opaque lightmapped
1345                 if (r_textureunits.integer >= 2)
1346                 {
1347                         if (r_textureunits.integer >= 3 && gl_combine.integer && r_detailtextures.integer)
1348                                 RSurfShader_OpaqueWall_Pass_BaseTripleTexCombine(ent, texture, surfchain);
1349                         else
1350                         {
1351                                 RSurfShader_OpaqueWall_Pass_BaseDoubleTex(ent, texture, surfchain);
1352                                 if (r_detailtextures.integer)
1353                                         RSurfShader_OpaqueWall_Pass_BaseDetail(ent, texture, surfchain);
1354                         }
1355                 }
1356                 else
1357                 {
1358                         RSurfShader_OpaqueWall_Pass_BaseTexture(ent, texture, surfchain);
1359                         RSurfShader_OpaqueWall_Pass_BaseLightmap(ent, texture, surfchain);
1360                         if (r_detailtextures.integer)
1361                                 RSurfShader_OpaqueWall_Pass_BaseDetail(ent, texture, surfchain);
1362                 }
1363                 if (!r_dlightmap.integer && !(ent->effects & EF_FULLBRIGHT))
1364                         RSurfShader_OpaqueWall_Pass_Light(ent, texture, surfchain);
1365                 if (texture->glowtexture)
1366                         RSurfShader_OpaqueWall_Pass_Glow(ent, texture, surfchain);
1367                 if (fogenabled)
1368                         RSurfShader_OpaqueWall_Pass_Fog(ent, texture, surfchain);
1369         }
1370 }
1371
1372 Cshader_t Cshader_wall_lightmap = {{NULL, RSurfShader_Wall_Lightmap}, SHADERFLAGS_NEEDLIGHTMAP};
1373 Cshader_t Cshader_water = {{NULL, RSurfShader_Water}, 0};
1374 Cshader_t Cshader_sky = {{RSurfShader_Sky, NULL}, 0};
1375
1376 int Cshader_count = 3;
1377 Cshader_t *Cshaders[3] =
1378 {
1379         &Cshader_wall_lightmap,
1380         &Cshader_water,
1381         &Cshader_sky
1382 };
1383
1384 void R_UpdateTextureInfo(entity_render_t *ent)
1385 {
1386         int i, texframe, alttextures;
1387         texture_t *t;
1388
1389         if (!ent->model)
1390                 return;
1391
1392         alttextures = ent->frame != 0;
1393         texframe = (int)(cl.time * 5.0f);
1394         for (i = 0;i < ent->model->numtextures;i++)
1395         {
1396                 t = ent->model->textures + i;
1397                 t->currentalpha = ent->alpha;
1398                 if (t->flags & SURF_WATERALPHA)
1399                         t->currentalpha *= r_wateralpha.value;
1400                 if (ent->effects & EF_ADDITIVE)
1401                         t->rendertype = SURFRENDER_ADD;
1402                 else if (t->currentalpha < 1 || t->fogtexture != NULL)
1403                         t->rendertype = SURFRENDER_ALPHA;
1404                 else
1405                         t->rendertype = SURFRENDER_OPAQUE;
1406                 // we don't need to set currentframe if t->animated is false because
1407                 // it was already set up by the texture loader for non-animating
1408                 if (t->animated)
1409                         t->currentframe = t->anim_frames[alttextures][(t->anim_total[alttextures] >= 2) ? (texframe % t->anim_total[alttextures]) : 0];
1410         }
1411 }
1412
1413 void R_PrepareSurfaces(entity_render_t *ent)
1414 {
1415         int i, numsurfaces, *surfacevisframes;
1416         model_t *model;
1417         msurface_t *surf, *surfaces, **surfchain;
1418         vec3_t modelorg;
1419
1420         if (!ent->model)
1421                 return;
1422
1423         model = ent->model;
1424         Matrix4x4_Transform(&ent->inversematrix, r_origin, modelorg);
1425         numsurfaces = model->nummodelsurfaces;
1426         surfaces = model->surfaces + model->firstmodelsurface;
1427         surfacevisframes = model->surfacevisframes + model->firstmodelsurface;
1428
1429         R_UpdateTextureInfo(ent);
1430
1431         if (r_dynamic.integer && r_shadow_lightingmode < 1)
1432                 R_MarkLights(ent);
1433
1434         if (model->light_ambient != r_ambient.value || model->light_scalebit != r_lightmapscalebit)
1435         {
1436                 model->light_ambient = r_ambient.value;
1437                 model->light_scalebit = r_lightmapscalebit;
1438                 for (i = 0;i < model->nummodelsurfaces;i++)
1439                         model->surfaces[i + model->firstmodelsurface].cached_dlight = true;
1440         }
1441         else
1442         {
1443                 for (i = 0;i < model->light_styles;i++)
1444                 {
1445                         if (model->light_stylevalue[i] != d_lightstylevalue[model->light_style[i]])
1446                         {
1447                                 model->light_stylevalue[i] = d_lightstylevalue[model->light_style[i]];
1448                                 for (surfchain = model->light_styleupdatechains[i];*surfchain;surfchain++)
1449                                         (**surfchain).cached_dlight = true;
1450                         }
1451                 }
1452         }
1453
1454         for (i = 0, surf = surfaces;i < numsurfaces;i++, surf++)
1455         {
1456                 if (surfacevisframes[i] == r_framecount)
1457                 {
1458 #if !WORLDNODECULLBACKFACES
1459                         // mark any backface surfaces as not visible
1460                         if (PlaneDist(modelorg, surf->plane) < surf->plane->dist)
1461                         {
1462                                 if (!(surf->flags & SURF_PLANEBACK))
1463                                         surfacevisframes[i] = -1;
1464                         }
1465                         else
1466                         {
1467                                 if ((surf->flags & SURF_PLANEBACK))
1468                                         surfacevisframes[i] = -1;
1469                         }
1470                         if (surfacevisframes[i] == r_framecount)
1471 #endif
1472                         {
1473                                 c_faces++;
1474                                 surf->visframe = r_framecount;
1475                                 if (surf->cached_dlight && surf->lightmaptexture != NULL && !r_vertexsurfaces.integer)
1476                                         R_BuildLightMap(ent, surf);
1477                         }
1478                 }
1479         }
1480 }
1481
1482 void R_DrawSurfaces(entity_render_t *ent, int type, msurface_t ***chains)
1483 {
1484         int i;
1485         texture_t *t;
1486         R_Mesh_Matrix(&ent->matrix);
1487         for (i = 0, t = ent->model->textures;i < ent->model->numtextures;i++, t++)
1488                 if (t->shader->shaderfunc[type] && t->currentframe && chains[i] != NULL)
1489                         t->shader->shaderfunc[type](ent, t->currentframe, chains[i]);
1490 }
1491
1492 static void R_DrawPortal_Callback(const void *calldata1, int calldata2)
1493 {
1494         int i;
1495         float *v;
1496         rmeshstate_t m;
1497         const entity_render_t *ent = calldata1;
1498         const mportal_t *portal = ent->model->portals + calldata2;
1499         memset(&m, 0, sizeof(m));
1500         m.blendfunc1 = GL_SRC_ALPHA;
1501         m.blendfunc2 = GL_ONE_MINUS_SRC_ALPHA;
1502         R_Mesh_Matrix(&ent->matrix);
1503         R_Mesh_State(&m);
1504         R_Mesh_ResizeCheck(portal->numpoints);
1505         i = portal - ent->model->portals;
1506         GL_Color(((i & 0x0007) >> 0) * (1.0f / 7.0f) * r_colorscale,
1507                          ((i & 0x0038) >> 3) * (1.0f / 7.0f) * r_colorscale,
1508                          ((i & 0x01C0) >> 6) * (1.0f / 7.0f) * r_colorscale,
1509                          0.125f);
1510         if (PlaneDiff(r_origin, (&portal->plane)) > 0)
1511         {
1512                 for (i = portal->numpoints - 1, v = varray_vertex;i >= 0;i--, v += 4)
1513                         VectorCopy(portal->points[i].position, v);
1514         }
1515         else
1516                 for (i = 0, v = varray_vertex;i < portal->numpoints;i++, v += 4)
1517                         VectorCopy(portal->points[i].position, v);
1518         R_Mesh_Draw(portal->numpoints, portal->numpoints - 2, polygonelements);
1519 }
1520
1521 static void R_DrawPortals(entity_render_t *ent)
1522 {
1523         int i;
1524         mportal_t *portal, *endportal;
1525         float temp[3], center[3], f;
1526         for (portal = ent->model->portals, endportal = portal + ent->model->numportals;portal < endportal;portal++)
1527         {
1528                 if ((portal->here->pvsframe == ent->model->pvsframecount || portal->past->pvsframe == ent->model->pvsframecount) && portal->numpoints <= POLYGONELEMENTS_MAXPOINTS)
1529                 {
1530                         VectorClear(temp);
1531                         for (i = 0;i < portal->numpoints;i++)
1532                                 VectorAdd(temp, portal->points[i].position, temp);
1533                         f = ixtable[portal->numpoints];
1534                         VectorScale(temp, f, temp);
1535                         Matrix4x4_Transform(&ent->matrix, temp, center);
1536                         R_MeshQueue_AddTransparent(center, R_DrawPortal_Callback, ent, portal - ent->model->portals);
1537                 }
1538         }
1539 }
1540
1541 void R_PrepareBrushModel(entity_render_t *ent)
1542 {
1543         int i, numsurfaces, *surfacevisframes, *surfacepvsframes;
1544         msurface_t *surf;
1545         model_t *model;
1546 #if WORLDNODECULLBACKFACES
1547         vec3_t modelorg;
1548 #endif
1549
1550         // because bmodels can be reused, we have to decide which things to render
1551         // from scratch every time
1552         model = ent->model;
1553 #if WORLDNODECULLBACKFACES
1554         Matrix4x4_Transform(&ent->inversematrix, r_origin, modelorg);
1555 #endif
1556         numsurfaces = model->nummodelsurfaces;
1557         surf = model->surfaces + model->firstmodelsurface;
1558         surfacevisframes = model->surfacevisframes + model->firstmodelsurface;
1559         surfacepvsframes = model->surfacepvsframes + model->firstmodelsurface;
1560         for (i = 0;i < numsurfaces;i++, surf++)
1561         {
1562 #if WORLDNODECULLBACKFACES
1563                 // mark any backface surfaces as not visible
1564                 if (PlaneDist(modelorg, surf->plane) < surf->plane->dist)
1565                 {
1566                         if ((surf->flags & SURF_PLANEBACK))
1567                                 surfacevisframes[i] = r_framecount;
1568                 }
1569                 else if (!(surf->flags & SURF_PLANEBACK))
1570                         surfacevisframes[i] = r_framecount;
1571 #else
1572                 surfacevisframes[i] = r_framecount;
1573 #endif
1574                 surf->dlightframe = -1;
1575         }
1576         R_PrepareSurfaces(ent);
1577 }
1578
1579 void R_SurfaceWorldNode (entity_render_t *ent)
1580 {
1581         int i, *surfacevisframes, *surfacepvsframes, surfnum;
1582         msurface_t *surf;
1583         mleaf_t *leaf;
1584         model_t *model;
1585         vec3_t modelorg;
1586
1587         model = ent->model;
1588         surfacevisframes = model->surfacevisframes + model->firstmodelsurface;
1589         surfacepvsframes = model->surfacepvsframes + model->firstmodelsurface;
1590         Matrix4x4_Transform(&ent->inversematrix, r_origin, modelorg);
1591
1592         for (leaf = model->pvsleafchain;leaf;leaf = leaf->pvschain)
1593         {
1594                 if (!R_CullBox (leaf->mins, leaf->maxs))
1595                 {
1596                         c_leafs++;
1597                         leaf->visframe = r_framecount;
1598                 }
1599         }
1600
1601         for (i = 0;i < model->pvssurflistlength;i++)
1602         {
1603                 surfnum = model->pvssurflist[i];
1604                 surf = model->surfaces + surfnum;
1605 #if WORLDNODECULLBACKFACES
1606                 if (PlaneDist(modelorg, surf->plane) < surf->plane->dist)
1607                 {
1608                         if ((surf->flags & SURF_PLANEBACK) && !R_CullBox (surf->poly_mins, surf->poly_maxs))
1609                                 surfacevisframes[surfnum] = r_framecount;
1610                 }
1611                 else
1612                 {
1613                         if (!(surf->flags & SURF_PLANEBACK) && !R_CullBox (surf->poly_mins, surf->poly_maxs))
1614                                 surfacevisframes[surfnum] = r_framecount;
1615                 }
1616 #else
1617                 if (!R_CullBox (surf->poly_mins, surf->poly_maxs))
1618                         surfacevisframes[surfnum] = r_framecount;
1619 #endif
1620         }
1621 }
1622
1623 static void R_PortalWorldNode(entity_render_t *ent, mleaf_t *viewleaf)
1624 {
1625         int c, leafstackpos, *mark, *surfacevisframes;
1626 #if WORLDNODECULLBACKFACES
1627         int n;
1628         msurface_t *surf;
1629 #endif
1630         mleaf_t *leaf, *leafstack[8192];
1631         mportal_t *p;
1632         vec3_t modelorg;
1633         msurface_t *surfaces;
1634         // LordHavoc: portal-passage worldnode with PVS;
1635         // follows portals leading outward from viewleaf, does not venture
1636         // offscreen or into leafs that are not visible, faster than Quake's
1637         // RecursiveWorldNode
1638         surfaces = ent->model->surfaces;
1639         surfacevisframes = ent->model->surfacevisframes;
1640         Matrix4x4_Transform(&ent->inversematrix, r_origin, modelorg);
1641         viewleaf->worldnodeframe = r_framecount;
1642         leafstack[0] = viewleaf;
1643         leafstackpos = 1;
1644         while (leafstackpos)
1645         {
1646                 c_leafs++;
1647                 leaf = leafstack[--leafstackpos];
1648                 leaf->visframe = r_framecount;
1649                 // draw any surfaces bounding this leaf
1650                 if (leaf->nummarksurfaces)
1651                 {
1652                         for (c = leaf->nummarksurfaces, mark = leaf->firstmarksurface;c;c--)
1653                         {
1654 #if WORLDNODECULLBACKFACES
1655                                 n = *mark++;
1656                                 if (surfacevisframes[n] != r_framecount)
1657                                 {
1658                                         surf = surfaces + n;
1659                                         if (PlaneDist(modelorg, surf->plane) < surf->plane->dist)
1660                                         {
1661                                                 if ((surf->flags & SURF_PLANEBACK))
1662                                                         surfacevisframes[n] = r_framecount;
1663                                         }
1664                                         else
1665                                         {
1666                                                 if (!(surf->flags & SURF_PLANEBACK))
1667                                                         surfacevisframes[n] = r_framecount;
1668                                         }
1669                                 }
1670 #else
1671                                 surfacevisframes[*mark++] = r_framecount;
1672 #endif
1673                         }
1674                 }
1675                 // follow portals into other leafs
1676                 for (p = leaf->portals;p;p = p->next)
1677                 {
1678                         // LordHavoc: this DotProduct hurts less than a cache miss
1679                         // (which is more likely to happen if backflowing through leafs)
1680                         if (DotProduct(modelorg, p->plane.normal) < (p->plane.dist + 1))
1681                         {
1682                                 leaf = p->past;
1683                                 if (leaf->worldnodeframe != r_framecount)
1684                                 {
1685                                         leaf->worldnodeframe = r_framecount;
1686                                         // FIXME: R_CullBox is absolute, should be done relative
1687                                         if (leaf->pvsframe == ent->model->pvsframecount && !R_CullBox(leaf->mins, leaf->maxs))
1688                                                 leafstack[leafstackpos++] = leaf;
1689                                 }
1690                         }
1691                 }
1692         }
1693         if (r_drawportals.integer)
1694                 R_DrawPortals(ent);
1695 }
1696
1697 void R_PVSUpdate (entity_render_t *ent, mleaf_t *viewleaf)
1698 {
1699         int i, j, l, c, bits, *surfacepvsframes, *mark;
1700         mleaf_t *leaf;
1701         qbyte *vis;
1702         model_t *model;
1703
1704         model = ent->model;
1705         if (model && (model->pvsviewleaf != viewleaf || model->pvsviewleafnovis != r_novis.integer))
1706         {
1707                 model->pvsframecount++;
1708                 model->pvsviewleaf = viewleaf;
1709                 model->pvsviewleafnovis = r_novis.integer;
1710                 model->pvsleafchain = NULL;
1711                 model->pvssurflistlength = 0;
1712                 if (viewleaf)
1713                 {
1714                         surfacepvsframes = model->surfacepvsframes;
1715                         vis = Mod_LeafPVS (viewleaf, model);
1716                         for (j = 0;j < model->numleafs;j += 8)
1717                         {
1718                                 bits = *vis++;
1719                                 if (bits)
1720                                 {
1721                                         l = model->numleafs - j;
1722                                         if (l > 8)
1723                                                 l = 8;
1724                                         for (i = 0;i < l;i++)
1725                                         {
1726                                                 if (bits & (1 << i))
1727                                                 {
1728                                                         leaf = &model->leafs[j + i + 1];
1729                                                         leaf->pvschain = model->pvsleafchain;
1730                                                         model->pvsleafchain = leaf;
1731                                                         leaf->pvsframe = model->pvsframecount;
1732                                                         // mark surfaces bounding this leaf as visible
1733                                                         for (c = leaf->nummarksurfaces, mark = leaf->firstmarksurface;c;c--, mark++)
1734                                                                 surfacepvsframes[*mark] = model->pvsframecount;
1735                                                 }
1736                                         }
1737                                 }
1738                         }
1739                         Mod_BuildPVSTextureChains(model);
1740                 }
1741         }
1742 }
1743
1744 void R_WorldVisibility (entity_render_t *ent)
1745 {
1746         vec3_t modelorg;
1747         mleaf_t *viewleaf;
1748
1749         Matrix4x4_Transform(&ent->inversematrix, r_origin, modelorg);
1750         viewleaf = Mod_PointInLeaf (modelorg, ent->model);
1751         R_PVSUpdate(ent, viewleaf);
1752
1753         if (!viewleaf)
1754                 return;
1755
1756         if (r_surfaceworldnode.integer || viewleaf->contents == CONTENTS_SOLID)
1757                 R_SurfaceWorldNode (ent);
1758         else
1759                 R_PortalWorldNode (ent, viewleaf);
1760 }
1761
1762 void R_DrawWorld (entity_render_t *ent)
1763 {
1764         R_PrepareSurfaces(ent);
1765         R_DrawSurfaces(ent, SHADERSTAGE_SKY, ent->model->pvstexturechains);
1766         R_DrawSurfaces(ent, SHADERSTAGE_NORMAL, ent->model->pvstexturechains);
1767 }
1768
1769 void R_Model_Brush_DrawSky (entity_render_t *ent)
1770 {
1771         if (ent != &cl_entities[0].render)
1772                 R_PrepareBrushModel(ent);
1773         R_DrawSurfaces(ent, SHADERSTAGE_SKY, ent->model->pvstexturechains);
1774 }
1775
1776 void R_Model_Brush_Draw (entity_render_t *ent)
1777 {
1778         c_bmodels++;
1779         if (ent != &cl_entities[0].render)
1780                 R_PrepareBrushModel(ent);
1781         R_DrawSurfaces(ent, SHADERSTAGE_NORMAL, ent->model->pvstexturechains);
1782 }
1783
1784 void R_Model_Brush_DrawShadowVolume (entity_render_t *ent, vec3_t relativelightorigin, float lightradius)
1785 {
1786         int i;
1787         msurface_t *surf;
1788         float projectdistance, f, temp[3], lightradius2;
1789         surfmesh_t *mesh;
1790         R_Mesh_Matrix(&ent->matrix);
1791         lightradius2 = lightradius * lightradius;
1792         R_UpdateTextureInfo(ent);
1793         projectdistance = 1000000000.0f;//lightradius + ent->model->radius;
1794         for (i = 0, surf = ent->model->surfaces + ent->model->firstmodelsurface;i < ent->model->nummodelsurfaces;i++, surf++)
1795         {
1796                 if (surf->texinfo->texture->rendertype == SURFRENDER_OPAQUE && surf->flags & SURF_SHADOWCAST)
1797                 {
1798                         f = PlaneDiff(relativelightorigin, surf->plane);
1799                         if (surf->flags & SURF_PLANEBACK)
1800                                 f = -f;
1801                         // draw shadows only for frontfaces and only if they are close
1802                         if (f >= 0.1 && f < lightradius)
1803                         {
1804                                 temp[0] = bound(surf->poly_mins[0], relativelightorigin[0], surf->poly_maxs[0]) - relativelightorigin[0];
1805                                 temp[1] = bound(surf->poly_mins[1], relativelightorigin[1], surf->poly_maxs[1]) - relativelightorigin[1];
1806                                 temp[2] = bound(surf->poly_mins[2], relativelightorigin[2], surf->poly_maxs[2]) - relativelightorigin[2];
1807                                 if (DotProduct(temp, temp) < lightradius2)
1808                                 {
1809                                         for (mesh = surf->mesh;mesh;mesh = mesh->chain)
1810                                         {
1811                                                 R_Mesh_ResizeCheck(mesh->numverts * 2);
1812                                                 memcpy(varray_vertex, mesh->verts, mesh->numverts * sizeof(float[4]));
1813                                                 R_Shadow_Volume(mesh->numverts, mesh->numtriangles, mesh->index, mesh->triangleneighbors, relativelightorigin, lightradius, projectdistance);
1814                                         }
1815                                 }
1816                         }
1817                 }
1818         }
1819 }
1820
1821 void R_Model_Brush_DrawLightForSurfaceList(entity_render_t *ent, vec3_t relativelightorigin, vec3_t relativeeyeorigin, float lightradius, float *lightcolor, msurface_t **surflist, int numsurfaces)
1822 {
1823         int surfnum;
1824         msurface_t *surf;
1825         texture_t *t;
1826         surfmesh_t *mesh;
1827         R_Mesh_Matrix(&ent->matrix);
1828         R_UpdateTextureInfo(ent);
1829         for (surfnum = 0;surfnum < numsurfaces;surfnum++)
1830         {
1831                 surf = surflist[surfnum];
1832                 if (surf->visframe == r_framecount)
1833                 {
1834                         t = surf->texinfo->texture->currentframe;
1835                         if (t->rendertype == SURFRENDER_OPAQUE && t->flags & SURF_SHADOWLIGHT)
1836                         {
1837                                 for (mesh = surf->mesh;mesh;mesh = mesh->chain)
1838                                 {
1839                                         R_Mesh_ResizeCheck(mesh->numverts);
1840                                         memcpy(varray_vertex, mesh->verts, mesh->numverts * sizeof(float[4]));
1841                                         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);
1842                                         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);
1843                                 }
1844                         }
1845                 }
1846         }
1847 }
1848
1849 void R_Model_Brush_DrawLight(entity_render_t *ent, vec3_t relativelightorigin, vec3_t relativeeyeorigin, float lightradius, float *lightcolor)
1850 {
1851         int surfnum;
1852         msurface_t *surf;
1853         texture_t *t;
1854         float f, lightradius2, temp[3];
1855         surfmesh_t *mesh;
1856         R_Mesh_Matrix(&ent->matrix);
1857         lightradius2 = lightradius * lightradius;
1858         R_UpdateTextureInfo(ent);
1859         if (ent != &cl_entities[0].render)
1860         {
1861                 // bmodel, cull crudely to view and light
1862                 for (surfnum = 0, surf = ent->model->surfaces + ent->model->firstmodelsurface;surfnum < ent->model->nummodelsurfaces;surfnum++, surf++)
1863                 {
1864                         temp[0] = bound(surf->poly_mins[0], relativelightorigin[0], surf->poly_maxs[0]) - relativelightorigin[0];
1865                         temp[1] = bound(surf->poly_mins[1], relativelightorigin[1], surf->poly_maxs[1]) - relativelightorigin[1];
1866                         temp[2] = bound(surf->poly_mins[2], relativelightorigin[2], surf->poly_maxs[2]) - relativelightorigin[2];
1867                         if (DotProduct(temp, temp) < lightradius2)
1868                         {
1869                                 f = PlaneDiff(relativelightorigin, surf->plane);
1870                                 if (surf->flags & SURF_PLANEBACK)
1871                                         f = -f;
1872                                 if (f >= -0.1 && f < lightradius)
1873                                 {
1874                                         f = PlaneDiff(relativeeyeorigin, surf->plane);
1875                                         if (surf->flags & SURF_PLANEBACK)
1876                                                 f = -f;
1877                                         if (f > 0)
1878                                         {
1879                                                 t = surf->texinfo->texture->currentframe;
1880                                                 if (t->rendertype == SURFRENDER_OPAQUE && t->flags & SURF_SHADOWLIGHT)
1881                                                 {
1882                                                         for (mesh = surf->mesh;mesh;mesh = mesh->chain)
1883                                                         {
1884                                                                 R_Mesh_ResizeCheck(mesh->numverts);
1885                                                                 memcpy(varray_vertex, mesh->verts, mesh->numverts * sizeof(float[4]));
1886                                                                 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);
1887                                                                 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);
1888                                                         }
1889                                                 }
1890                                         }
1891                                 }
1892                         }
1893                 }
1894         }
1895         else
1896         {
1897                 // world, already culled to view, just cull to light
1898                 for (surfnum = 0, surf = ent->model->surfaces + ent->model->firstmodelsurface;surfnum < ent->model->nummodelsurfaces;surfnum++, surf++)
1899                 {
1900                         if (surf->visframe == r_framecount)
1901                         {
1902                                 temp[0] = bound(surf->poly_mins[0], relativelightorigin[0], surf->poly_maxs[0]) - relativelightorigin[0];
1903                                 temp[1] = bound(surf->poly_mins[1], relativelightorigin[1], surf->poly_maxs[1]) - relativelightorigin[1];
1904                                 temp[2] = bound(surf->poly_mins[2], relativelightorigin[2], surf->poly_maxs[2]) - relativelightorigin[2];
1905                                 if (DotProduct(temp, temp) < lightradius2)
1906                                 {
1907                                         f = PlaneDiff(relativelightorigin, surf->plane);
1908                                         if (surf->flags & SURF_PLANEBACK)
1909                                                 f = -f;
1910                                         if (f >= -0.1 && f < lightradius)
1911                                         {
1912                                                 t = surf->texinfo->texture->currentframe;
1913                                                 if (t->rendertype == SURFRENDER_OPAQUE && t->flags & SURF_SHADOWLIGHT)
1914                                                 {
1915                                                         for (mesh = surf->mesh;mesh;mesh = mesh->chain)
1916                                                         {
1917                                                                 R_Mesh_ResizeCheck(mesh->numverts);
1918                                                                 memcpy(varray_vertex, mesh->verts, mesh->numverts * sizeof(float[4]));
1919                                                                 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);
1920                                                                 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);
1921                                                         }
1922                                                 }
1923                                         }
1924                                 }
1925                         }
1926                 }
1927         }
1928 }
1929
1930 static void gl_surf_start(void)
1931 {
1932 }
1933
1934 static void gl_surf_shutdown(void)
1935 {
1936 }
1937
1938 static void gl_surf_newmap(void)
1939 {
1940 }
1941
1942 void GL_Surf_Init(void)
1943 {
1944         int i;
1945         dlightdivtable[0] = 4194304;
1946         for (i = 1;i < 32768;i++)
1947                 dlightdivtable[i] = 4194304 / (i << 7);
1948
1949         Cvar_RegisterVariable(&r_ambient);
1950         Cvar_RegisterVariable(&r_vertexsurfaces);
1951         Cvar_RegisterVariable(&r_dlightmap);
1952         Cvar_RegisterVariable(&r_drawportals);
1953         Cvar_RegisterVariable(&r_testvis);
1954         Cvar_RegisterVariable(&r_floatbuildlightmap);
1955         Cvar_RegisterVariable(&r_detailtextures);
1956         Cvar_RegisterVariable(&r_surfaceworldnode);
1957
1958         R_RegisterModule("GL_Surf", gl_surf_start, gl_surf_shutdown, gl_surf_newmap);
1959 }
1960