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
  24 #define MAX_LIGHTMAP_SIZE 256
  25
  26 static unsigned int intblocklights[MAX_LIGHTMAP_SIZE*MAX_LIGHTMAP_SIZE*3]; // LordHavoc: *3 for colored lighting
  27 static float floatblocklights[MAX_LIGHTMAP_SIZE*MAX_LIGHTMAP_SIZE*3]; // LordHavoc: *3 for colored lighting
  28
  29 static qbyte templight[MAX_LIGHTMAP_SIZE*MAX_LIGHTMAP_SIZE*4];
  30
  31 cvar_t r_ambient = {0, "r_ambient", "0"};
  32 cvar_t r_vertexsurfaces = {0, "r_vertexsurfaces", "0"};
  33 cvar_t r_dlightmap = {CVAR_SAVE, "r_dlightmap", "1"};
  34 cvar_t r_drawportals = {0, "r_drawportals", "0"};
  35 cvar_t r_testvis = {0, "r_testvis", "0"};
  36 cvar_t r_floatbuildlightmap = {0, "r_floatbuildlightmap", "0"};
  37
  38 static int dlightdivtable[32768];
  39
  40 static int R_IntAddDynamicLights (msurface_t *surf)
  41 {
  42         int sdtable[256], lnum, td, maxdist, maxdist2, maxdist3, i, s, t, smax, tmax, smax3, red, green, blue, lit, dist2, impacts, impactt, subtract;
  43         unsigned int *bl;
  44         float dist, impact[3], local[3];
  45
  46         // LordHavoc: use 64bit integer...  shame it's not very standardized...
  47 #if _MSC_VER || __BORLANDC__
  48         __int64     k;
  49 #else
  50         long long   k;
  51 #endif
  52
  53         lit = false;
  54
  55         smax = (surf->extents[0] >> 4) + 1;
  56         tmax = (surf->extents[1] >> 4) + 1;
  57         smax3 = smax * 3;
  58
  59         for (lnum = 0; lnum < r_numdlights; lnum++)
  60         {
  61                 if (!(surf->dlightbits[lnum >> 5] & (1 << (lnum & 31))))
  62                         continue;                                       // not lit by this light
  63
  64                 softwareuntransform(r_dlight[lnum].origin, local);
  65                 dist = DotProduct (local, surf->plane->normal) - surf->plane->dist;
  66
  67                 // for comparisons to minimum acceptable light
  68                 // compensate for LIGHTOFFSET
  69                 maxdist = (int) r_dlight[lnum].cullradius2 + LIGHTOFFSET;
  70
  71                 dist2 = dist * dist;
  72                 dist2 += LIGHTOFFSET;
  73                 if (dist2 >= maxdist)
  74                         continue;
  75
  76                 if (surf->plane->type < 3)
  77                 {
  78                         VectorCopy(local, impact);
  79                         impact[surf->plane->type] -= dist;
  80                 }
  81                 else
  82                 {
  83                         impact[0] = local[0] - surf->plane->normal[0] * dist;
  84                         impact[1] = local[1] - surf->plane->normal[1] * dist;
  85                         impact[2] = local[2] - surf->plane->normal[2] * dist;
  86                 }
  87
  88                 impacts = DotProduct (impact, surf->texinfo->vecs[0]) + surf->texinfo->vecs[0][3] - surf->texturemins[0];
  89                 impactt = DotProduct (impact, surf->texinfo->vecs[1]) + surf->texinfo->vecs[1][3] - surf->texturemins[1];
  90
  91                 s = bound(0, impacts, smax * 16) - impacts;
  92                 t = bound(0, impactt, tmax * 16) - impactt;
  93                 i = s * s + t * t + dist2;
  94                 if (i > maxdist)
  95                         continue;
  96
  97                 // reduce calculations
  98                 for (s = 0, i = impacts; s < smax; s++, i -= 16)
  99                         sdtable[s] = i * i + dist2;
 100
 101                 maxdist3 = maxdist - dist2;
 102
 103                 // convert to 8.8 blocklights format
 104                 red = r_dlight[lnum].light[0];
 105                 green = r_dlight[lnum].light[1];
 106                 blue = r_dlight[lnum].light[2];
 107                 subtract = (int) (r_dlight[lnum].lightsubtract * 4194304.0f);
 108                 bl = intblocklights;
 109
 110                 i = impactt;
 111                 for (t = 0;t < tmax;t++, i -= 16)
 112                 {
 113                         td = i * i;
 114                         // make sure some part of it is visible on this line
 115                         if (td < maxdist3)
 116                         {
 117                                 maxdist2 = maxdist - td;
 118                                 for (s = 0;s < smax;s++)
 119                                 {
 120                                         if (sdtable[s] < maxdist2)
 121                                         {
 122                                                 k = dlightdivtable[(sdtable[s] + td) >> 7] - subtract;
 123                                                 if (k > 0)
 124                                                 {
 125                                                         bl[0] += (red   * k) >> 8;
 126                                                         bl[1] += (green * k) >> 8;
 127                                                         bl[2] += (blue  * k) >> 8;
 128                                                         lit = true;
 129                                                 }
 130                                         }
 131                                         bl += 3;
 132                                 }
 133                         }
 134                         else // skip line
 135                                 bl += smax3;
 136                 }
 137         }
 138         return lit;
 139 }
 140
 141 static int R_FloatAddDynamicLights (msurface_t *surf)
 142 {
 143         int lnum, s, t, smax, tmax, smax3, lit, impacts, impactt;
 144         float sdtable[256], *bl, k, dist, dist2, maxdist, maxdist2, maxdist3, td1, td, red, green, blue, impact[3], local[3], subtract;
 145
 146         lit = false;
 147
 148         smax = (surf->extents[0] >> 4) + 1;
 149         tmax = (surf->extents[1] >> 4) + 1;
 150         smax3 = smax * 3;
 151
 152         for (lnum = 0; lnum < r_numdlights; lnum++)
 153         {
 154                 if (!(surf->dlightbits[lnum >> 5] & (1 << (lnum & 31))))
 155                         continue;                                       // not lit by this light
 156
 157                 softwareuntransform(r_dlight[lnum].origin, local);
 158                 dist = DotProduct (local, surf->plane->normal) - surf->plane->dist;
 159
 160                 // for comparisons to minimum acceptable light
 161                 // compensate for LIGHTOFFSET
 162                 maxdist = (int) r_dlight[lnum].cullradius2 + LIGHTOFFSET;
 163
 164                 dist2 = dist * dist;
 165                 dist2 += LIGHTOFFSET;
 166                 if (dist2 >= maxdist)
 167                         continue;
 168
 169                 if (surf->plane->type < 3)
 170                 {
 171                         VectorCopy(local, impact);
 172                         impact[surf->plane->type] -= dist;
 173                 }
 174                 else
 175                 {
 176                         impact[0] = local[0] - surf->plane->normal[0] * dist;
 177                         impact[1] = local[1] - surf->plane->normal[1] * dist;
 178                         impact[2] = local[2] - surf->plane->normal[2] * dist;
 179                 }
 180
 181                 impacts = DotProduct (impact, surf->texinfo->vecs[0]) + surf->texinfo->vecs[0][3] - surf->texturemins[0];
 182                 impactt = DotProduct (impact, surf->texinfo->vecs[1]) + surf->texinfo->vecs[1][3] - surf->texturemins[1];
 183
 184                 td = bound(0, impacts, smax * 16) - impacts;
 185                 td1 = bound(0, impactt, tmax * 16) - impactt;
 186                 td = td * td + td1 * td1 + dist2;
 187                 if (td > maxdist)
 188                         continue;
 189
 190                 // reduce calculations
 191                 for (s = 0, td1 = impacts; s < smax; s++, td1 -= 16.0f)
 192                         sdtable[s] = td1 * td1 + dist2;
 193
 194                 maxdist3 = maxdist - dist2;
 195
 196                 // convert to 8.8 blocklights format
 197                 red = r_dlight[lnum].light[0];
 198                 green = r_dlight[lnum].light[1];
 199                 blue = r_dlight[lnum].light[2];
 200                 subtract = r_dlight[lnum].lightsubtract * 16384.0f;
 201                 bl = floatblocklights;
 202
 203                 td1 = impactt;
 204                 for (t = 0;t < tmax;t++, td1 -= 16.0f)
 205                 {
 206                         td = td1 * td1;
 207                         // make sure some part of it is visible on this line
 208                         if (td < maxdist3)
 209                         {
 210                                 maxdist2 = maxdist - td;
 211                                 for (s = 0;s < smax;s++)
 212                                 {
 213                                         if (sdtable[s] < maxdist2)
 214                                         {
 215                                                 k = (16384.0f / (sdtable[s] + td)) - subtract;
 216                                                 bl[0] += red   * k;
 217                                                 bl[1] += green * k;
 218                                                 bl[2] += blue  * k;
 219                                                 lit = true;
 220                                         }
 221                                         bl += 3;
 222                                 }
 223                         }
 224                         else // skip line
 225                                 bl += smax3;
 226                 }
 227         }
 228         return lit;
 229 }
 230
 231 /*
 232 ===============
 233 R_BuildLightMap
 234
 235 Combine and scale multiple lightmaps into the 8.8 format in blocklights
 236 ===============
 237 */
 238 static void R_BuildLightMap (msurface_t *surf, int dlightchanged)
 239 {
 240         if (!r_floatbuildlightmap.integer)
 241         {
 242                 int smax, tmax, i, j, size, size3, shift, maps, stride, l;
 243                 unsigned int *bl, scale;
 244                 qbyte *lightmap, *out, *stain;
 245
 246                 // update cached lighting info
 247                 surf->cached_dlight = 0;
 248                 surf->cached_lightscalebit = lightscalebit;
 249                 surf->cached_ambient = r_ambient.value;
 250                 surf->cached_light[0] = d_lightstylevalue[surf->styles[0]];
 251                 surf->cached_light[1] = d_lightstylevalue[surf->styles[1]];
 252                 surf->cached_light[2] = d_lightstylevalue[surf->styles[2]];
 253                 surf->cached_light[3] = d_lightstylevalue[surf->styles[3]];
 254
 255                 smax = (surf->extents[0]>>4)+1;
 256                 tmax = (surf->extents[1]>>4)+1;
 257                 size = smax*tmax;
 258                 size3 = size*3;
 259                 lightmap = surf->samples;
 260
 261         // set to full bright if no light data
 262                 bl = intblocklights;
 263                 if ((currentrenderentity->effects & EF_FULLBRIGHT) || !currentrenderentity->model->lightdata)
 264                 {
 265                         for (i = 0;i < size3;i++)
 266                                 bl[i] = 255*256;
 267                 }
 268                 else
 269                 {
 270         // clear to no light
 271                         j = r_ambient.value * 512.0f; // would be 128.0f logically, but using 512.0f to match winquake style
 272                         if (j)
 273                         {
 274                                 for (i = 0;i < size3;i++)
 275                                         *bl++ = j;
 276                         }
 277                         else
 278                                 memset(bl, 0, size*3*sizeof(unsigned int));
 279
 280                         if (surf->dlightframe == r_framecount && r_dlightmap.integer)
 281                         {
 282                                 surf->cached_dlight = R_IntAddDynamicLights(surf);
 283                                 if (surf->cached_dlight)
 284                                         c_light_polys++;
 285                                 else if (dlightchanged)
 286                                         return; // don't upload if only updating dlights and none mattered
 287                         }
 288
 289         // add all the lightmaps
 290                         if (lightmap)
 291                         {
 292                                 bl = intblocklights;
 293                                 for (maps = 0;maps < MAXLIGHTMAPS && surf->styles[maps] != 255;maps++, lightmap += size3)
 294                                         for (scale = d_lightstylevalue[surf->styles[maps]], i = 0;i < size3;i++)
 295                                                 bl[i] += lightmap[i] * scale;
 296                         }
 297                 }
 298
 299                 stain = surf->stainsamples;
 300                 bl = intblocklights;
 301                 out = templight;
 302                 // deal with lightmap brightness scale
 303                 shift = 7 + lightscalebit + 8;
 304                 if (currentrenderentity->model->lightmaprgba)
 305                 {
 306                         stride = (surf->lightmaptexturestride - smax) * 4;
 307                         for (i = 0;i < tmax;i++, out += stride)
 308                         {
 309                                 for (j = 0;j < smax;j++)
 310                                 {
 311                                         l = (*bl++ * *stain++) >> shift;*out++ = min(l, 255);
 312                                         l = (*bl++ * *stain++) >> shift;*out++ = min(l, 255);
 313                                         l = (*bl++ * *stain++) >> shift;*out++ = min(l, 255);
 314                                         *out++ = 255;
 315                                 }
 316                         }
 317                 }
 318                 else
 319                 {
 320                         stride = (surf->lightmaptexturestride - smax) * 3;
 321                         for (i = 0;i < tmax;i++, out += stride)
 322                         {
 323                                 for (j = 0;j < smax;j++)
 324                                 {
 325                                         l = (*bl++ * *stain++) >> shift;*out++ = min(l, 255);
 326                                         l = (*bl++ * *stain++) >> shift;*out++ = min(l, 255);
 327                                         l = (*bl++ * *stain++) >> shift;*out++ = min(l, 255);
 328                                 }
 329                         }
 330                 }
 331
 332                 R_UpdateTexture(surf->lightmaptexture, templight);
 333         }
 334         else
 335         {
 336                 int smax, tmax, i, j, size, size3, maps, stride, l;
 337                 float *bl, scale;
 338                 qbyte *lightmap, *out, *stain;
 339
 340                 // update cached lighting info
 341                 surf->cached_dlight = 0;
 342                 surf->cached_lightscalebit = lightscalebit;
 343                 surf->cached_ambient = r_ambient.value;
 344                 surf->cached_light[0] = d_lightstylevalue[surf->styles[0]];
 345                 surf->cached_light[1] = d_lightstylevalue[surf->styles[1]];
 346                 surf->cached_light[2] = d_lightstylevalue[surf->styles[2]];
 347                 surf->cached_light[3] = d_lightstylevalue[surf->styles[3]];
 348
 349                 smax = (surf->extents[0]>>4)+1;
 350                 tmax = (surf->extents[1]>>4)+1;
 351                 size = smax*tmax;
 352                 size3 = size*3;
 353                 lightmap = surf->samples;
 354
 355         // set to full bright if no light data
 356                 bl = floatblocklights;
 357                 if ((currentrenderentity->effects & EF_FULLBRIGHT) || !currentrenderentity->model->lightdata)
 358                         j = 255*256;
 359                 else
 360                         j = r_ambient.value * 512.0f; // would be 128.0f logically, but using 512.0f to match winquake style
 361
 362                 // clear to no light
 363                 if (j)
 364                 {
 365                         for (i = 0;i < size3;i++)
 366                                 *bl++ = j;
 367                 }
 368                 else
 369                         memset(bl, 0, size*3*sizeof(float));
 370
 371                 if (surf->dlightframe == r_framecount && r_dlightmap.integer)
 372                 {
 373                         surf->cached_dlight = R_FloatAddDynamicLights(surf);
 374                         if (surf->cached_dlight)
 375                                 c_light_polys++;
 376                         else if (dlightchanged)
 377                                 return; // don't upload if only updating dlights and none mattered
 378                 }
 379
 380                 // add all the lightmaps
 381                 if (lightmap)
 382                 {
 383                         bl = floatblocklights;
 384                         for (maps = 0;maps < MAXLIGHTMAPS && surf->styles[maps] != 255;maps++, lightmap += size3)
 385                                 for (scale = d_lightstylevalue[surf->styles[maps]], i = 0;i < size3;i++)
 386                                         bl[i] += lightmap[i] * scale;
 387                 }
 388
 389                 stain = surf->stainsamples;
 390                 bl = floatblocklights;
 391                 out = templight;
 392                 // deal with lightmap brightness scale
 393                 scale = 1.0f / (1 << (7 + lightscalebit + 8));
 394                 if (currentrenderentity->model->lightmaprgba)
 395                 {
 396                         stride = (surf->lightmaptexturestride - smax) * 4;
 397                         for (i = 0;i < tmax;i++, out += stride)
 398                         {
 399                                 for (j = 0;j < smax;j++)
 400                                 {
 401                                         l = *bl++ * *stain++ * scale;*out++ = min(l, 255);
 402                                         l = *bl++ * *stain++ * scale;*out++ = min(l, 255);
 403                                         l = *bl++ * *stain++ * scale;*out++ = min(l, 255);
 404                                         *out++ = 255;
 405                                 }
 406                         }
 407                 }
 408                 else
 409                 {
 410                         stride = (surf->lightmaptexturestride - smax) * 3;
 411                         for (i = 0;i < tmax;i++, out += stride)
 412                         {
 413                                 for (j = 0;j < smax;j++)
 414                                 {
 415                                         l = *bl++ * *stain++ * scale;*out++ = min(l, 255);
 416                                         l = *bl++ * *stain++ * scale;*out++ = min(l, 255);
 417                                         l = *bl++ * *stain++ * scale;*out++ = min(l, 255);
 418                                 }
 419                         }
 420                 }
 421
 422                 R_UpdateTexture(surf->lightmaptexture, templight);
 423         }
 424 }
 425
 426 void R_StainNode (mnode_t *node, model_t *model, vec3_t origin, float radius, int icolor[8])
 427 {
 428         float ndist;
 429         msurface_t *surf, *endsurf;
 430         int sdtable[256], td, maxdist, maxdist2, maxdist3, i, s, t, smax, tmax, smax3, dist2, impacts, impactt, subtract, a, stained, cr, cg, cb, ca, ratio;
 431         qbyte *bl;
 432         vec3_t impact;
 433         // LordHavoc: use 64bit integer...  shame it's not very standardized...
 434 #if _MSC_VER || __BORLANDC__
 435         __int64     k;
 436 #else
 437         long long   k;
 438 #endif
 439
 440
 441         // for comparisons to minimum acceptable light
 442         // compensate for 4096 offset
 443         maxdist = radius * radius + 4096;
 444
 445         // clamp radius to avoid exceeding 32768 entry division table
 446         if (maxdist > 4194304)
 447                 maxdist = 4194304;
 448
 449         subtract = (int) ((1.0f / maxdist) * 4194304.0f);
 450
 451 loc0:
 452         if (node->contents < 0)
 453                 return;
 454         ndist = PlaneDiff(origin, node->plane);
 455         if (ndist > radius)
 456         {
 457                 node = node->children[0];
 458                 goto loc0;
 459         }
 460         if (ndist < -radius)
 461         {
 462                 node = node->children[1];
 463                 goto loc0;
 464         }
 465
 466         dist2 = ndist * ndist;
 467         dist2 += 4096.0f;
 468         if (dist2 < maxdist)
 469         {
 470                 maxdist3 = maxdist - dist2;
 471
 472                 if (node->plane->type < 3)
 473                 {
 474                         VectorCopy(origin, impact);
 475                         impact[node->plane->type] -= ndist;
 476                 }
 477                 else
 478                 {
 479                         impact[0] = origin[0] - node->plane->normal[0] * ndist;
 480                         impact[1] = origin[1] - node->plane->normal[1] * ndist;
 481                         impact[2] = origin[2] - node->plane->normal[2] * ndist;
 482                 }
 483
 484                 for (surf = model->surfaces + node->firstsurface, endsurf = surf + node->numsurfaces;surf < endsurf;surf++)
 485                 {
 486                         if (surf->stainsamples)
 487                         {
 488                                 smax = (surf->extents[0] >> 4) + 1;
 489                                 tmax = (surf->extents[1] >> 4) + 1;
 490
 491                                 impacts = DotProduct (impact, surf->texinfo->vecs[0]) + surf->texinfo->vecs[0][3] - surf->texturemins[0];
 492                                 impactt = DotProduct (impact, surf->texinfo->vecs[1]) + surf->texinfo->vecs[1][3] - surf->texturemins[1];
 493
 494                                 s = bound(0, impacts, smax * 16) - impacts;
 495                                 t = bound(0, impactt, tmax * 16) - impactt;
 496                                 i = s * s + t * t + dist2;
 497                                 if (i > maxdist)
 498                                         continue;
 499
 500                                 // reduce calculations
 501                                 for (s = 0, i = impacts; s < smax; s++, i -= 16)
 502                                         sdtable[s] = i * i + dist2;
 503
 504                                 // convert to 8.8 blocklights format
 505                                 bl = surf->stainsamples;
 506                                 smax3 = smax * 3;
 507                                 stained = false;
 508
 509                                 i = impactt;
 510                                 for (t = 0;t < tmax;t++, i -= 16)
 511                                 {
 512                                         td = i * i;
 513                                         // make sure some part of it is visible on this line
 514                                         if (td < maxdist3)
 515                                         {
 516                                                 maxdist2 = maxdist - td;
 517                                                 for (s = 0;s < smax;s++)
 518                                                 {
 519                                                         if (sdtable[s] < maxdist2)
 520                                                         {
 521                                                                 k = dlightdivtable[(sdtable[s] + td) >> 7] - subtract;
 522                                                                 if (k > 0)
 523                                                                 {
 524                                                                         ratio = rand() & 255;
 525                                                                         ca = (((icolor[7] - icolor[3]) * ratio) >> 8) + icolor[3];
 526                                                                         a = (ca * k) >> 8;
 527                                                                         if (a > 0)
 528                                                                         {
 529                                                                                 a = bound(0, a, 256);
 530                                                                                 cr = (((icolor[4] - icolor[0]) * ratio) >> 8) + icolor[0];
 531                                                                                 cg = (((icolor[5] - icolor[1]) * ratio) >> 8) + icolor[1];
 532                                                                                 cb = (((icolor[6] - icolor[2]) * ratio) >> 8) + icolor[2];
 533                                                                                 bl[0] = (qbyte) ((((cr - (int) bl[0]) * a) >> 8) + (int) bl[0]);
 534                                                                                 bl[1] = (qbyte) ((((cg - (int) bl[1]) * a) >> 8) + (int) bl[1]);
 535                                                                                 bl[2] = (qbyte) ((((cb - (int) bl[2]) * a) >> 8) + (int) bl[2]);
 536                                                                                 stained = true;
 537                                                                         }
 538                                                                 }
 539                                                         }
 540                                                         bl += 3;
 541                                                 }
 542                                         }
 543                                         else // skip line
 544                                                 bl += smax3;
 545                                 }
 546                                 // force lightmap upload
 547                                 if (stained)
 548                                         surf->cached_dlight = true;
 549                         }
 550                 }
 551         }
 552
 553         if (node->children[0]->contents >= 0)
 554         {
 555                 if (node->children[1]->contents >= 0)
 556                 {
 557                         R_StainNode(node->children[0], model, origin, radius, icolor);
 558                         node = node->children[1];
 559                         goto loc0;
 560                 }
 561                 else
 562                 {
 563                         node = node->children[0];
 564                         goto loc0;
 565                 }
 566         }
 567         else if (node->children[1]->contents >= 0)
 568         {
 569                 node = node->children[1];
 570                 goto loc0;
 571         }
 572 }
 573
 574 void R_Stain (vec3_t origin, float radius, int cr1, int cg1, int cb1, int ca1, int cr2, int cg2, int cb2, int ca2)
 575 {
 576         int n, icolor[8];
 577         entity_render_t *ent;
 578         model_t *model;
 579         vec3_t org;
 580         icolor[0] = cr1;
 581         icolor[1] = cg1;
 582         icolor[2] = cb1;
 583         icolor[3] = ca1;
 584         icolor[4] = cr2;
 585         icolor[5] = cg2;
 586         icolor[6] = cb2;
 587         icolor[7] = ca2;
 588
 589         model = cl.worldmodel;
 590         softwaretransformidentity();
 591         R_StainNode(model->nodes + model->hulls[0].firstclipnode, model, origin, radius, icolor);
 592
 593         // look for embedded bmodels
 594         for (n = 0;n < cl_num_brushmodel_entities;n++)
 595         {
 596                 ent = cl_brushmodel_entities[n];
 597                 model = ent->model;
 598                 if (model && model->name[0] == '*')
 599                 {
 600                         Mod_CheckLoaded(model);
 601                         if (model->type == mod_brush)
 602                         {
 603                                 softwaretransformforentity(ent);
 604                                 softwareuntransform(origin, org);
 605                                 R_StainNode(model->nodes + model->hulls[0].firstclipnode, model, org, radius, icolor);
 606                         }
 607                 }
 608         }
 609 }
 610
 611
 612 /*
 613 =============================================================
 614
 615         BRUSH MODELS
 616
 617 =============================================================
 618 */
 619
 620
 621 static float turbsin[256] =
 622 {
 623         #include "gl_warp_sin.h"
 624 };
 625 #define TURBSCALE (256.0 / (2 * M_PI))
 626
 627 // only need to hold as many verts as the mesh splitter will allow in model_brush.c
 628 #define MAX_SURFVERTS 3072
 629 typedef struct
 630 {
 631         float v[4];
 632         float st[2];
 633         float uv[2];
 634         float c[4];
 635 }
 636 surfvert_t;
 637 static surfvert_t svert[MAX_SURFVERTS]; // used by the following functions
 638
 639 static void RSurfShader_Sky(msurface_t *firstsurf)
 640 {
 641         msurface_t *surf;
 642         int i;
 643         float number, length, dir[3], speedscale;
 644         surfvertex_t *v;
 645         surfvert_t *sv;
 646         surfmesh_t *mesh;
 647         rmeshinfo_t m;
 648
 649         // LordHavoc: HalfLife maps have freaky skypolys...
 650         if (currentrenderentity->model->ishlbsp)
 651                 return;
 652
 653         if (skyrendermasked)
 654         {
 655                 if (skyrendernow)
 656                 {
 657                         skyrendernow = false;
 658                         R_Sky();
 659                 }
 660                 for (surf = firstsurf;surf;surf = surf->chain)
 661                 {
 662                         // draw depth-only polys
 663                         memset(&m, 0, sizeof(m));
 664                         m.transparent = false;
 665                         m.blendfunc1 = GL_ZERO;
 666                         m.blendfunc2 = GL_ONE;
 667                         m.depthwrite = true;
 668                         for (mesh = surf->mesh;mesh;mesh = mesh->chain)
 669                         {
 670                                 m.numtriangles = mesh->numtriangles;
 671                                 m.numverts = mesh->numverts;
 672                                 m.index = mesh->index;
 673                                 if (softwaretransform_complexity)
 674                                 {
 675                                         m.vertex = &svert[0].v[0];
 676                                         m.vertexstep = sizeof(surfvert_t);
 677                                         for (i = 0, sv = svert, v = mesh->vertex;i < m.numverts;i++, sv++, v++)
 678                                                 softwaretransform(v->v, sv->v);
 679                                 }
 680                                 else
 681                                 {
 682                                         m.vertex = &mesh->vertex[0].v[0];
 683                                         m.vertexstep = sizeof(surfvertex_t);
 684                                 }
 685                                 R_Mesh_Draw(&m);
 686                         }
 687                 }
 688         }
 689         else if (skyrenderglquake)
 690         {
 691                 for (surf = firstsurf;surf;surf = surf->chain)
 692                 {
 693                         memset(&m, 0, sizeof(m));
 694                         m.transparent = false;
 695                         m.blendfunc1 = GL_ONE;
 696                         m.blendfunc2 = GL_ZERO;
 697                         m.vertex = &svert[0].v[0];
 698                         m.vertexstep = sizeof(surfvert_t);
 699                         m.cr = 1;
 700                         m.cg = 1;
 701                         m.cb = 1;
 702                         m.ca = 1;
 703                         m.tex[0] = R_GetTexture(solidskytexture);
 704                         m.texcoords[0] = &svert[0].st[0];
 705                         m.texcoordstep[0] = sizeof(surfvert_t);
 706                         speedscale = cl.time * (8.0/128.0);
 707                         speedscale -= (int)speedscale;
 708                         for (mesh = surf->mesh;mesh;mesh = mesh->chain)
 709                         {
 710                                 m.numtriangles = mesh->numtriangles;
 711                                 m.numverts = mesh->numverts;
 712                                 m.index = mesh->index;
 713                                 for (i = 0, sv = svert, v = mesh->vertex;i < m.numverts;i++, sv++, v++)
 714                                 {
 715                                         softwaretransform(v->v, sv->v);
 716                                         VectorSubtract (sv->v, r_origin, dir);
 717                                         // flatten the sphere
 718                                         dir[2] *= 3;
 719
 720                                         number = DotProduct(dir, dir);
 721                                         #if SLOWMATH
 722                                         length = 3.0f / sqrt(number);
 723                                         #else
 724                                         *((int *)&length) = 0x5f3759df - ((* (int *) &number) >> 1);
 725                                         length = 3.0f * (length * (1.5f - (number * 0.5f * length * length)));
 726                                         #endif
 727
 728                                         sv->st[0] = speedscale + dir[0] * length;
 729                                         sv->st[1] = speedscale + dir[1] * length;
 730                                 }
 731                                 R_Mesh_Draw(&m);
 732                         }
 733                 }
 734         }
 735         else
 736         {
 737                 for (surf = firstsurf;surf;surf = surf->chain)
 738                 {
 739                         // flat color
 740                         memset(&m, 0, sizeof(m));
 741                         m.transparent = false;
 742                         m.blendfunc1 = GL_ONE;
 743                         m.blendfunc2 = GL_ZERO;
 744                         m.cr = fogcolor[0];
 745                         m.cg = fogcolor[1];
 746                         m.cb = fogcolor[2];
 747                         m.ca = 1;
 748                         for (mesh = surf->mesh;mesh;mesh = mesh->chain)
 749                         {
 750                                 m.numtriangles = mesh->numtriangles;
 751                                 m.numverts = mesh->numverts;
 752                                 m.index = mesh->index;
 753                                 if (softwaretransform_complexity)
 754                                 {
 755                                         m.vertex = &svert[0].v[0];
 756                                         m.vertexstep = sizeof(surfvert_t);
 757                                         for (i = 0, sv = svert, v = mesh->vertex;i < m.numverts;i++, sv++, v++)
 758                                                 softwaretransform(v->v, sv->v);
 759                                 }
 760                                 else
 761                                 {
 762                                         m.vertex = &mesh->vertex[0].v[0];
 763                                         m.vertexstep = sizeof(surfvertex_t);
 764                                 }
 765                                 R_Mesh_Draw(&m);
 766                         }
 767                 }
 768         }
 769         if (skyrenderglquake)
 770         {
 771                 for (surf = firstsurf;surf;surf = surf->chain)
 772                 {
 773                         memset(&m, 0, sizeof(m));
 774                         m.transparent = false;
 775                         m.blendfunc1 = GL_SRC_ALPHA;
 776                         m.blendfunc2 = GL_ONE_MINUS_SRC_ALPHA;
 777                         m.vertex = &svert[0].v[0];
 778                         m.vertexstep = sizeof(surfvert_t);
 779                         m.cr = 1;
 780                         m.cg = 1;
 781                         m.cb = 1;
 782                         m.ca = 1;
 783                         m.tex[0] = R_GetTexture(alphaskytexture);
 784                         m.texcoords[0] = &svert[0].st[0];
 785                         m.texcoordstep[0] = sizeof(surfvert_t);
 786                         speedscale = cl.time * (16.0/128.0);
 787                         speedscale -= (int)speedscale;
 788                         for (mesh = surf->mesh;mesh;mesh = mesh->chain)
 789                         {
 790                                 m.numtriangles = mesh->numtriangles;
 791                                 m.numverts = mesh->numverts;
 792                                 m.index = mesh->index;
 793                                 for (i = 0, sv = svert, v = mesh->vertex;i < m.numverts;i++, sv++, v++)
 794                                 {
 795                                         softwaretransform(v->v, sv->v);
 796                                         VectorSubtract (sv->v, r_origin, dir);
 797                                         // flatten the sphere
 798                                         dir[2] *= 3;
 799
 800                                         number = DotProduct(dir, dir);
 801                                         #if SLOWMATH
 802                                         length = 3.0f / sqrt(number);
 803                                         #else
 804                                         *((int *)&length) = 0x5f3759df - ((* (int *) &number) >> 1);
 805                                         length = 3.0f * (length * (1.5f - (number * 0.5f * length * length)));
 806                                         #endif
 807
 808                                         sv->st[0] = speedscale + dir[0] * length;
 809                                         sv->st[1] = speedscale + dir[1] * length;
 810                                 }
 811                                 R_Mesh_Draw(&m);
 812                         }
 813                 }
 814         }
 815 }
 816
 817 static int RSurf_Light(int *dlightbits, int numverts)
 818 {
 819         float           f;
 820         int                     i, l, lit = false;
 821         rdlight_t       *rd;
 822         vec3_t          lightorigin;
 823         surfvert_t      *sv;
 824         for (l = 0;l < r_numdlights;l++)
 825         {
 826                 if (dlightbits[l >> 5] & (1 << (l & 31)))
 827                 {
 828                         rd = &r_dlight[l];
 829                         // FIXME: support softwareuntransform here and make bmodels use hardware transform?
 830                         VectorCopy(rd->origin, lightorigin);
 831                         for (i = 0, sv = svert;i < numverts;i++, sv++)
 832                         {
 833                                 f = VectorDistance2(sv->v, lightorigin) + LIGHTOFFSET;
 834                                 if (f < rd->cullradius2)
 835                                 {
 836                                         f = (1.0f / f) - rd->lightsubtract;
 837                                         sv->c[0] += rd->light[0] * f;
 838                                         sv->c[1] += rd->light[1] * f;
 839                                         sv->c[2] += rd->light[2] * f;
 840                                         lit = true;
 841                                 }
 842                         }
 843                 }
 844         }
 845         return lit;
 846 }
 847
 848 static void RSurfShader_Water_Pass_Base(msurface_t *surf)
 849 {
 850         int i;
 851         float diff[3], alpha, ifog;
 852         surfvertex_t *v;
 853         surfvert_t *sv;
 854         surfmesh_t *mesh;
 855         rmeshinfo_t m;
 856         alpha = currentrenderentity->alpha * (surf->flags & SURF_DRAWNOALPHA ? 1 : r_wateralpha.value);
 857
 858         memset(&m, 0, sizeof(m));
 859         if (alpha != 1 || surf->currenttexture->fogtexture != NULL)
 860         {
 861                 m.transparent = true;
 862                 m.blendfunc1 = GL_SRC_ALPHA;
 863                 m.blendfunc2 = GL_ONE_MINUS_SRC_ALPHA;
 864         }
 865         else
 866         {
 867                 m.transparent = false;
 868                 m.blendfunc1 = GL_ONE;
 869                 m.blendfunc2 = GL_ZERO;
 870         }
 871         m.vertex = &svert[0].v[0];
 872         m.vertexstep = sizeof(surfvert_t);
 873         m.color = &svert[0].c[0];
 874         m.colorstep = sizeof(surfvert_t);
 875         m.tex[0] = R_GetTexture(surf->currenttexture->texture);
 876         m.texcoords[0] = &svert[0].st[0];
 877         m.texcoordstep[0] = sizeof(surfvert_t);
 878         for (mesh = surf->mesh;mesh;mesh = mesh->chain)
 879         {
 880                 m.numtriangles = mesh->numtriangles;
 881                 m.numverts = mesh->numverts;
 882                 m.index = mesh->index;
 883                 for (i = 0, sv = svert, v = mesh->vertex;i < m.numverts;i++, sv++, v++)
 884                 {
 885                         softwaretransform(v->v, sv->v);
 886                         if (r_waterripple.value)
 887                                 sv->v[2] += r_waterripple.value * (1.0f / 64.0f) * turbsin[(int)((v->v[0]*(1.0f/32.0f)+cl.time) * TURBSCALE) & 255] * turbsin[(int)((v->v[1]*(1.0f/32.0f)+cl.time) * TURBSCALE) & 255];
 888                         if (surf->flags & SURF_DRAWFULLBRIGHT)
 889                         {
 890                                 sv->c[0] = 1;
 891                                 sv->c[1] = 1;
 892                                 sv->c[2] = 1;
 893                                 sv->c[3] = alpha;
 894                         }
 895                         else
 896                         {
 897                                 sv->c[0] = 0.5f;
 898                                 sv->c[1] = 0.5f;
 899                                 sv->c[2] = 0.5f;
 900                                 sv->c[3] = alpha;
 901                         }
 902                         sv->st[0] = (v->st[0] + turbsin[(int)((v->st[1]*0.125f+cl.time) * TURBSCALE) & 255]) * (1.0f / 64.0f);
 903                         sv->st[1] = (v->st[1] + turbsin[(int)((v->st[0]*0.125f+cl.time) * TURBSCALE) & 255]) * (1.0f / 64.0f);
 904                 }
 905                 if (surf->dlightframe == r_framecount && !(surf->flags & SURF_DRAWFULLBRIGHT))
 906                         RSurf_Light(surf->dlightbits, m.numverts);
 907                 if (fogenabled && (surf->flags & SURF_DRAWNOALPHA))
 908                 {
 909                         for (i = 0, sv = svert;i < m.numverts;i++, sv++)
 910                         {
 911                                 VectorSubtract(sv->v, r_origin, diff);
 912                                 ifog = 1 - exp(fogdensity/DotProduct(diff, diff));
 913                                 sv->c[0] *= ifog;
 914                                 sv->c[1] *= ifog;
 915                                 sv->c[2] *= ifog;
 916                         }
 917                 }
 918                 R_Mesh_Draw(&m);
 919         }
 920 }
 921
 922 static void RSurfShader_Water_Pass_Glow(msurface_t *surf)
 923 {
 924         int i;
 925         float diff[3], alpha, ifog;
 926         surfvertex_t *v;
 927         surfvert_t *sv;
 928         surfmesh_t *mesh;
 929         rmeshinfo_t m;
 930         alpha = currentrenderentity->alpha * (surf->flags & SURF_DRAWNOALPHA ? 1 : r_wateralpha.value);
 931
 932         memset(&m, 0, sizeof(m));
 933         m.transparent = alpha != 1 || surf->currenttexture->fogtexture != NULL;
 934         m.blendfunc1 = GL_SRC_ALPHA;
 935         m.blendfunc2 = GL_ONE;
 936         m.vertex = &svert[0].v[0];
 937         m.vertexstep = sizeof(surfvert_t);
 938         m.cr = 1;
 939         m.cg = 1;
 940         m.cb = 1;
 941         m.ca = alpha;
 942         m.tex[0] = R_GetTexture(surf->currenttexture->glowtexture);
 943         m.texcoords[0] = &svert[0].st[0];
 944         m.texcoordstep[0] = sizeof(surfvert_t);
 945         for (mesh = surf->mesh;mesh;mesh = mesh->chain)
 946         {
 947                 m.numtriangles = mesh->numtriangles;
 948                 m.numverts = mesh->numverts;
 949                 m.index = mesh->index;
 950                 if (fogenabled)
 951                 {
 952                         m.color = &svert[0].c[0];
 953                         m.colorstep = sizeof(surfvert_t);
 954                         for (i = 0, sv = svert, v = mesh->vertex;i < m.numverts;i++, sv++, v++)
 955                         {
 956                                 softwaretransform(v->v, sv->v);
 957                                 if (r_waterripple.value)
 958                                         sv->v[2] += r_waterripple.value * (1.0f / 64.0f) * turbsin[(int)((v->v[0]*(1.0f/32.0f)+cl.time) * TURBSCALE) & 255] * turbsin[(int)((v->v[1]*(1.0f/32.0f)+cl.time) * TURBSCALE) & 255];
 959                                 sv->st[0] = (v->st[0] + turbsin[(int)((v->st[1]*0.125f+cl.time) * TURBSCALE) & 255]) * (1.0f / 64.0f);
 960                                 sv->st[1] = (v->st[1] + turbsin[(int)((v->st[0]*0.125f+cl.time) * TURBSCALE) & 255]) * (1.0f / 64.0f);
 961                                 VectorSubtract(sv->v, r_origin, diff);
 962                                 ifog = 1 - exp(fogdensity/DotProduct(diff, diff));
 963                                 sv->c[0] = m.cr * ifog;
 964                                 sv->c[1] = m.cg * ifog;
 965                                 sv->c[2] = m.cb * ifog;
 966                                 sv->c[3] = m.ca;
 967                         }
 968                 }
 969                 else
 970                 {
 971                         for (i = 0, sv = svert, v = mesh->vertex;i < m.numverts;i++, sv++, v++)
 972                         {
 973                                 softwaretransform(v->v, sv->v);
 974                                 if (r_waterripple.value)
 975                                         sv->v[2] += r_waterripple.value * (1.0f / 64.0f) * turbsin[(int)((v->v[0]*(1.0f/32.0f)+cl.time) * TURBSCALE) & 255] * turbsin[(int)((v->v[1]*(1.0f/32.0f)+cl.time) * TURBSCALE) & 255];
 976                                 sv->st[0] = (v->st[0] + turbsin[(int)((v->st[1]*0.125f+cl.time) * TURBSCALE) & 255]) * (1.0f / 64.0f);
 977                                 sv->st[1] = (v->st[1] + turbsin[(int)((v->st[0]*0.125f+cl.time) * TURBSCALE) & 255]) * (1.0f / 64.0f);
 978                         }
 979                 }
 980                 R_Mesh_Draw(&m);
 981         }
 982 }
 983
 984 static void RSurfShader_Water_Pass_Fog(msurface_t *surf)
 985 {
 986         int i;
 987         float alpha;
 988         surfvertex_t *v;
 989         surfvert_t *sv;
 990         surfmesh_t *mesh;
 991         rmeshinfo_t m;
 992         vec3_t diff;
 993         alpha = currentrenderentity->alpha * (surf->flags & SURF_DRAWNOALPHA ? 1 : r_wateralpha.value);
 994
 995         memset(&m, 0, sizeof(m));
 996         m.transparent = alpha != 1 || surf->currenttexture->fogtexture != NULL;
 997         m.blendfunc1 = GL_SRC_ALPHA;
 998         m.blendfunc2 = GL_ONE;
 999         m.vertex = &svert[0].v[0];
1000         m.vertexstep = sizeof(surfvert_t);
1001         m.color = &svert[0].c[0];
1002         m.colorstep = sizeof(surfvert_t);
1003         m.tex[0] = R_GetTexture(surf->currenttexture->fogtexture);
1004         m.texcoords[0] = &svert[0].st[0];
1005         m.texcoordstep[0] = sizeof(surfvert_t);
1006
1007         for (mesh = surf->mesh;mesh;mesh = mesh->chain)
1008         {
1009                 m.numtriangles = mesh->numtriangles;
1010                 m.numverts = mesh->numverts;
1011                 m.index = mesh->index;
1012                 for (i = 0, sv = svert, v = mesh->vertex;i < m.numverts;i++, sv++, v++)
1013                 {
1014                         softwaretransform(v->v, sv->v);
1015                         if (r_waterripple.value)
1016                                 sv->v[2] += r_waterripple.value * (1.0f / 64.0f) * turbsin[(int)((v->v[0]*(1.0f/32.0f)+cl.time) * TURBSCALE) & 255] * turbsin[(int)((v->v[1]*(1.0f/32.0f)+cl.time) * TURBSCALE) & 255];
1017                         if (m.tex[0])
1018                         {
1019                                 sv->st[0] = (v->st[0] + turbsin[(int)((v->st[1]*0.125f+cl.time) * TURBSCALE) & 255]) * (1.0f / 64.0f);
1020                                 sv->st[1] = (v->st[1] + turbsin[(int)((v->st[0]*0.125f+cl.time) * TURBSCALE) & 255]) * (1.0f / 64.0f);
1021                         }
1022                         VectorSubtract(sv->v, r_origin, diff);
1023                         sv->c[0] = fogcolor[0];
1024                         sv->c[1] = fogcolor[1];
1025                         sv->c[2] = fogcolor[2];
1026                         sv->c[3] = alpha * exp(fogdensity/DotProduct(diff, diff));
1027                 }
1028                 R_Mesh_Draw(&m);
1029         }
1030 }
1031
1032 static void RSurfShader_Water(msurface_t *firstsurf)
1033 {
1034         msurface_t *surf;
1035         for (surf = firstsurf;surf;surf = surf->chain)
1036                 RSurfShader_Water_Pass_Base(surf);
1037         for (surf = firstsurf;surf;surf = surf->chain)
1038                 if (surf->currenttexture->glowtexture)
1039                         RSurfShader_Water_Pass_Glow(surf);
1040         if (fogenabled)
1041                 for (surf = firstsurf;surf;surf = surf->chain)
1042                         RSurfShader_Water_Pass_Fog(surf);
1043 }
1044
1045 static void RSurfShader_Wall_Pass_BaseMTex(msurface_t *surf)
1046 {
1047         int i;
1048         float diff[3], ifog;
1049         surfvertex_t *v;
1050         surfvert_t *sv;
1051         surfmesh_t *mesh;
1052         rmeshinfo_t m;
1053
1054         memset(&m, 0, sizeof(m));
1055         if (currentrenderentity->effects & EF_ADDITIVE)
1056         {
1057                 m.transparent = true;
1058                 m.blendfunc1 = GL_SRC_ALPHA;
1059                 m.blendfunc2 = GL_ONE;
1060         }
1061         else if (surf->currenttexture->fogtexture != NULL || currentrenderentity->alpha != 1)
1062         {
1063                 m.transparent = true;
1064                 m.blendfunc1 = GL_SRC_ALPHA;
1065                 m.blendfunc2 = GL_ONE_MINUS_SRC_ALPHA;
1066         }
1067         else
1068         {
1069                 m.transparent = false;
1070                 m.blendfunc1 = GL_ONE;
1071                 m.blendfunc2 = GL_ZERO;
1072         }
1073         m.cr = m.cg = m.cb = (float) (1 << lightscalebit);
1074         m.ca = currentrenderentity->alpha;
1075         m.tex[0] = R_GetTexture(surf->currenttexture->texture);
1076         m.tex[1] = R_GetTexture(surf->lightmaptexture);
1077         m.texcoordstep[0] = sizeof(surfvertex_t);
1078         m.texcoordstep[1] = sizeof(surfvertex_t);
1079         for (mesh = surf->mesh;mesh;mesh = mesh->chain)
1080         {
1081                 m.numtriangles = mesh->numtriangles;
1082                 m.numverts = mesh->numverts;
1083                 m.index = mesh->index;
1084                 m.texcoords[0] = &mesh->vertex->st[0];
1085                 m.texcoords[1] = &mesh->vertex->uv[0];
1086                 if (fogenabled)
1087                 {
1088                         m.color = &svert[0].c[0];
1089                         m.colorstep = sizeof(surfvert_t);
1090                         if (softwaretransform_complexity)
1091                         {
1092                                 m.vertex = &svert[0].v[0];
1093                                 m.vertexstep = sizeof(surfvert_t);
1094                                 for (i = 0, sv = svert, v = mesh->vertex;i < m.numverts;i++, sv++, v++)
1095                                 {
1096                                         softwaretransform(v->v, sv->v);
1097                                         VectorSubtract(sv->v, r_origin, diff);
1098                                         ifog = 1 - exp(fogdensity/DotProduct(diff, diff));
1099                                         sv->c[0] = m.cr * ifog;
1100                                         sv->c[1] = m.cg * ifog;
1101                                         sv->c[2] = m.cb * ifog;
1102                                         sv->c[3] = m.ca;
1103                                 }
1104                         }
1105                         else
1106                         {
1107                                 m.vertex = &mesh->vertex->v[0];
1108                                 m.vertexstep = sizeof(surfvertex_t);
1109                                 for (i = 0, sv = svert, v = mesh->vertex;i < m.numverts;i++, sv++, v++)
1110                                 {
1111                                         VectorSubtract(v->v, r_origin, diff);
1112                                         ifog = 1 - exp(fogdensity/DotProduct(diff, diff));
1113                                         sv->c[0] = m.cr * ifog;
1114                                         sv->c[1] = m.cg * ifog;
1115                                         sv->c[2] = m.cb * ifog;
1116                                         sv->c[3] = m.ca;
1117                                 }
1118                         }
1119                 }
1120                 else
1121                 {
1122                         if (softwaretransform_complexity)
1123                         {
1124                                 m.vertex = &svert[0].v[0];
1125                                 m.vertexstep = sizeof(surfvert_t);
1126                                 for (i = 0, sv = svert, v = mesh->vertex;i < m.numverts;i++, sv++, v++)
1127                                         softwaretransform(v->v, sv->v);
1128                         }
1129                         else
1130                         {
1131                                 m.vertex = &mesh->vertex->v[0];
1132                                 m.vertexstep = sizeof(surfvertex_t);
1133                         }
1134                 }
1135                 R_Mesh_Draw(&m);
1136         }
1137 }
1138
1139 static void RSurfShader_Wall_Pass_BaseTexture(msurface_t *surf)
1140 {
1141         int i;
1142         surfvertex_t *v;
1143         surfvert_t *sv;
1144         surfmesh_t *mesh;
1145         rmeshinfo_t m;
1146
1147         memset(&m, 0, sizeof(m));
1148         m.transparent = false;
1149         m.blendfunc1 = GL_ONE;
1150         m.blendfunc2 = GL_ZERO;
1151         m.cr = m.cg = m.cb = (float) (1 << v_overbrightbits.integer);
1152         m.ca = 1;
1153         m.tex[0] = R_GetTexture(surf->currenttexture->texture);
1154         m.texcoordstep[0] = sizeof(surfvertex_t);
1155         for (mesh = surf->mesh;mesh;mesh = mesh->chain)
1156         {
1157                 m.numtriangles = mesh->numtriangles;
1158                 m.numverts = mesh->numverts;
1159                 m.index = mesh->index;
1160                 m.texcoords[0] = &mesh->vertex->st[0];
1161                 if (softwaretransform_complexity)
1162                 {
1163                         m.vertex = &svert[0].v[0];
1164                         m.vertexstep = sizeof(surfvert_t);
1165                         for (i = 0, sv = svert, v = mesh->vertex;i < m.numverts;i++, sv++, v++)
1166                                 softwaretransform(v->v, sv->v);
1167                 }
1168                 else
1169                 {
1170                         m.vertex = &mesh->vertex->v[0];
1171                         m.vertexstep = sizeof(surfvertex_t);
1172                 }
1173                 R_Mesh_Draw(&m);
1174         }
1175 }
1176
1177 static void RSurfShader_Wall_Pass_BaseLightmap(msurface_t *surf)
1178 {
1179         int i;
1180         float diff[3], ifog;
1181         surfvertex_t *v;
1182         surfvert_t *sv;
1183         surfmesh_t *mesh;
1184         rmeshinfo_t m;
1185
1186         memset(&m, 0, sizeof(m));
1187         m.transparent = false;
1188         m.blendfunc1 = GL_ZERO;
1189         m.blendfunc2 = GL_SRC_COLOR;
1190         m.cr = m.cg = m.cb = (float) (1 << v_overbrightbits.integer);
1191         m.ca = 1;
1192         m.tex[0] = R_GetTexture(surf->lightmaptexture);
1193         m.texcoordstep[0] = sizeof(surfvertex_t);
1194         for (mesh = surf->mesh;mesh;mesh = mesh->chain)
1195         {
1196                 m.numtriangles = mesh->numtriangles;
1197                 m.numverts = mesh->numverts;
1198                 m.index = mesh->index;
1199                 m.texcoords[0] = &mesh->vertex->uv[0];
1200                 if (fogenabled)
1201                 {
1202                         m.color = &svert[0].c[0];
1203                         m.colorstep = sizeof(surfvert_t);
1204                         if (softwaretransform_complexity)
1205                         {
1206                                 m.vertex = &svert[0].v[0];
1207                                 m.vertexstep = sizeof(surfvert_t);
1208                                 for (i = 0, sv = svert, v = mesh->vertex;i < m.numverts;i++, sv++, v++)
1209                                 {
1210                                         softwaretransform(v->v, sv->v);
1211                                         VectorSubtract(sv->v, r_origin, diff);
1212                                         ifog = 1 - exp(fogdensity/DotProduct(diff, diff));
1213                                         sv->c[0] = m.cr * ifog;
1214                                         sv->c[1] = m.cg * ifog;
1215                                         sv->c[2] = m.cb * ifog;
1216                                         sv->c[3] = m.ca;
1217                                 }
1218                         }
1219                         else
1220                         {
1221                                 m.vertex = &mesh->vertex->v[0];
1222                                 m.vertexstep = sizeof(surfvertex_t);
1223                                 for (i = 0, sv = svert, v = mesh->vertex;i < m.numverts;i++, sv++, v++)
1224                                 {
1225                                         VectorSubtract(v->v, r_origin, diff);
1226                                         ifog = 1 - exp(fogdensity/DotProduct(diff, diff));
1227                                         sv->c[0] = m.cr * ifog;
1228                                         sv->c[1] = m.cg * ifog;
1229                                         sv->c[2] = m.cb * ifog;
1230                                         sv->c[3] = m.ca;
1231                                 }
1232                         }
1233                 }
1234                 else
1235                 {
1236                         if (softwaretransform_complexity)
1237                         {
1238                                 m.vertex = &svert[0].v[0];
1239                                 m.vertexstep = sizeof(surfvert_t);
1240                                 for (i = 0, sv = svert, v = mesh->vertex;i < m.numverts;i++, sv++, v++)
1241                                         softwaretransform(v->v, sv->v);
1242                         }
1243                         else
1244                         {
1245                                 m.vertex = &mesh->vertex->v[0];
1246                                 m.vertexstep = sizeof(surfvertex_t);
1247                         }
1248                 }
1249                 R_Mesh_Draw(&m);
1250         }
1251 }
1252
1253 static void RSurfShader_Wall_Pass_BaseVertex(msurface_t *surf)
1254 {
1255         int i, size3;
1256         float c[3], base[3], scale, diff[3], ifog;
1257         surfvertex_t *v;
1258         surfvert_t *sv;
1259         surfmesh_t *mesh;
1260         rmeshinfo_t m;
1261         qbyte *lm;
1262
1263         size3 = ((surf->extents[0]>>4)+1)*((surf->extents[1]>>4)+1)*3;
1264
1265         base[0] = base[1] = base[2] = r_ambient.value * (1.0f / 128.0f);
1266
1267         memset(&m, 0, sizeof(m));
1268         if (currentrenderentity->effects & EF_ADDITIVE)
1269         {
1270                 m.transparent = true;
1271                 m.blendfunc1 = GL_SRC_ALPHA;
1272                 m.blendfunc2 = GL_ONE;
1273         }
1274         else if (surf->currenttexture->fogtexture != NULL || currentrenderentity->alpha != 1)
1275         {
1276                 m.transparent = true;
1277                 m.blendfunc1 = GL_SRC_ALPHA;
1278                 m.blendfunc2 = GL_ONE_MINUS_SRC_ALPHA;
1279         }
1280         else
1281         {
1282                 m.transparent = false;
1283                 m.blendfunc1 = GL_ONE;
1284                 m.blendfunc2 = GL_ZERO;
1285         }
1286         m.vertex = &svert[0].v[0];
1287         m.vertexstep = sizeof(surfvert_t);
1288         m.color = &svert[0].c[0];
1289         m.colorstep = sizeof(surfvert_t);
1290         m.tex[0] = R_GetTexture(surf->currenttexture->texture);
1291         m.texcoordstep[0] = sizeof(surfvertex_t);
1292         for (mesh = surf->mesh;mesh;mesh = mesh->chain)
1293         {
1294                 m.numtriangles = mesh->numtriangles;
1295                 m.numverts = mesh->numverts;
1296                 m.index = mesh->index;
1297                 m.texcoords[0] = &mesh->vertex->st[0];
1298                 for (i = 0, sv = svert, v = mesh->vertex;i < m.numverts;i++, sv++, v++)
1299                 {
1300                         softwaretransform(v->v, sv->v);
1301                         VectorCopy(base, c);
1302                         if (surf->styles[0] != 255)
1303                         {
1304                                 lm = surf->samples + v->lightmapoffset;
1305                                 scale = d_lightstylevalue[surf->styles[0]] * (1.0f / 32768.0f);
1306                                 VectorMA(c, scale, lm, c);
1307                                 if (surf->styles[1] != 255)
1308                                 {
1309                                         lm += size3;
1310                                         scale = d_lightstylevalue[surf->styles[1]] * (1.0f / 32768.0f);
1311                                         VectorMA(c, scale, lm, c);
1312                                         if (surf->styles[2] != 255)
1313                                         {
1314                                                 lm += size3;
1315                                                 scale = d_lightstylevalue[surf->styles[2]] * (1.0f / 32768.0f);
1316                                                 VectorMA(c, scale, lm, c);
1317                                                 if (surf->styles[3] != 255)
1318                                                 {
1319                                                         lm += size3;
1320                                                         scale = d_lightstylevalue[surf->styles[3]] * (1.0f / 32768.0f);
1321                                                         VectorMA(c, scale, lm, c);
1322                                                 }
1323                                         }
1324                                 }
1325                         }
1326                         sv->c[0] = c[0];
1327                         sv->c[1] = c[1];
1328                         sv->c[2] = c[2];
1329                         sv->c[3] = currentrenderentity->alpha;
1330                 }
1331                 if (surf->dlightframe == r_framecount)
1332                         RSurf_Light(surf->dlightbits, m.numverts);
1333                 if (fogenabled)
1334                 {
1335                         for (i = 0, sv = svert, v = mesh->vertex;i < m.numverts;i++, sv++, v++)
1336                         {
1337                                 VectorSubtract(sv->v, r_origin, diff);
1338                                 ifog = 1 - exp(fogdensity/DotProduct(diff, diff));
1339                                 sv->c[0] *= ifog;
1340                                 sv->c[1] *= ifog;
1341                                 sv->c[2] *= ifog;
1342                         }
1343                 }
1344                 R_Mesh_Draw(&m);
1345         }
1346 }
1347
1348 static void RSurfShader_Wall_Pass_BaseFullbright(msurface_t *surf)
1349 {
1350         int i;
1351         float diff[3], ifog;
1352         surfvertex_t *v;
1353         surfvert_t *sv;
1354         surfmesh_t *mesh;
1355         rmeshinfo_t m;
1356
1357         memset(&m, 0, sizeof(m));
1358         if (currentrenderentity->effects & EF_ADDITIVE)
1359         {
1360                 m.transparent = true;
1361                 m.blendfunc1 = GL_SRC_ALPHA;
1362                 m.blendfunc2 = GL_ONE;
1363         }
1364         else if (surf->currenttexture->fogtexture != NULL || currentrenderentity->alpha != 1)
1365         {
1366                 m.transparent = true;
1367                 m.blendfunc1 = GL_SRC_ALPHA;
1368                 m.blendfunc2 = GL_ONE_MINUS_SRC_ALPHA;
1369         }
1370         else
1371         {
1372                 m.transparent = false;
1373                 m.blendfunc1 = GL_ONE;
1374                 m.blendfunc2 = GL_ZERO;
1375         }
1376         m.vertex = &svert[0].v[0];
1377         m.vertexstep = sizeof(surfvert_t);
1378         m.tex[0] = R_GetTexture(surf->currenttexture->texture);
1379         m.texcoordstep[0] = sizeof(surfvertex_t);
1380         for (mesh = surf->mesh;mesh;mesh = mesh->chain)
1381         {
1382                 m.numtriangles = mesh->numtriangles;
1383                 m.numverts = mesh->numverts;
1384                 m.index = mesh->index;
1385                 m.texcoords[0] = &mesh->vertex->st[0];
1386                 if (fogenabled)
1387                 {
1388                         m.color = &svert[0].c[0];
1389                         m.colorstep = sizeof(surfvert_t);
1390                         for (i = 0, sv = svert, v = mesh->vertex;i < m.numverts;i++, sv++, v++)
1391                         {
1392                                 softwaretransform(v->v, sv->v);
1393                                 VectorSubtract(sv->v, r_origin, diff);
1394                                 ifog = 1 - exp(fogdensity/DotProduct(diff, diff));
1395                                 sv->c[0] = ifog;
1396                                 sv->c[1] = ifog;
1397                                 sv->c[2] = ifog;
1398                                 sv->c[3] = currentrenderentity->alpha;
1399                         }
1400                 }
1401                 else
1402                 {
1403                         m.cr = m.cg = m.cb = 1;
1404                         m.ca = currentrenderentity->alpha;
1405                         for (i = 0, sv = svert, v = mesh->vertex;i < m.numverts;i++, sv++, v++)
1406                                 softwaretransform(v->v, sv->v);
1407                 }
1408                 R_Mesh_Draw(&m);
1409         }
1410 }
1411
1412 static void RSurfShader_Wall_Pass_Light(msurface_t *surf)
1413 {
1414         int i;
1415         float diff[3], ifog;
1416         surfvertex_t *v;
1417         surfvert_t *sv;
1418         surfmesh_t *mesh;
1419         rmeshinfo_t m;
1420
1421         memset(&m, 0, sizeof(m));
1422         if (currentrenderentity->effects & EF_ADDITIVE)
1423                 m.transparent = true;
1424         else if (surf->currenttexture->fogtexture != NULL || currentrenderentity->alpha != 1)
1425                 m.transparent = true;
1426         else
1427                 m.transparent = false;
1428         m.blendfunc1 = GL_SRC_ALPHA;
1429         m.blendfunc2 = GL_ONE;
1430         m.vertex = &svert[0].v[0];
1431         m.vertexstep = sizeof(surfvert_t);
1432         m.color = &svert[0].c[0];
1433         m.colorstep = sizeof(surfvert_t);
1434         m.tex[0] = R_GetTexture(surf->currenttexture->texture);
1435         m.texcoordstep[0] = sizeof(surfvertex_t);
1436         for (mesh = surf->mesh;mesh;mesh = mesh->chain)
1437         {
1438                 m.numtriangles = mesh->numtriangles;
1439                 m.numverts = mesh->numverts;
1440                 m.index = mesh->index;
1441                 m.texcoords[0] = &mesh->vertex->st[0];
1442                 for (i = 0, sv = svert, v = mesh->vertex;i < m.numverts;i++, sv++, v++)
1443                 {
1444                         softwaretransform(v->v, sv->v);
1445                         sv->c[0] = 0;
1446                         sv->c[1] = 0;
1447                         sv->c[2] = 0;
1448                         sv->c[3] = currentrenderentity->alpha;
1449                 }
1450                 if (RSurf_Light(surf->dlightbits, m.numverts))
1451                 {
1452                         if (fogenabled)
1453                         {
1454                                 for (i = 0, sv = svert;i < m.numverts;i++, sv++)
1455                                 {
1456                                         VectorSubtract(sv->v, r_origin, diff);
1457                                         ifog = 1 - exp(fogdensity/DotProduct(diff, diff));
1458                                         sv->c[0] *= ifog;
1459                                         sv->c[1] *= ifog;
1460                                         sv->c[2] *= ifog;
1461                                 }
1462                         }
1463                         R_Mesh_Draw(&m);
1464                 }
1465         }
1466 }
1467
1468 static void RSurfShader_Wall_Pass_Glow(msurface_t *surf)
1469 {
1470         int i;
1471         float diff[3], ifog;
1472         surfvertex_t *v;
1473         surfvert_t *sv;
1474         surfmesh_t *mesh;
1475         rmeshinfo_t m;
1476
1477         memset(&m, 0, sizeof(m));
1478         if (currentrenderentity->effects & EF_ADDITIVE)
1479                 m.transparent = true;
1480         else if (surf->currenttexture->fogtexture != NULL || currentrenderentity->alpha != 1)
1481                 m.transparent = true;
1482         else
1483                 m.transparent = false;
1484         m.blendfunc1 = GL_SRC_ALPHA;
1485         m.blendfunc2 = GL_ONE;
1486         m.cr = 1;
1487         m.cg = 1;
1488         m.cb = 1;
1489         m.ca = currentrenderentity->alpha;
1490         m.tex[0] = R_GetTexture(surf->currenttexture->glowtexture);
1491         m.texcoordstep[0] = sizeof(surfvertex_t);
1492         for (mesh = surf->mesh;mesh;mesh = mesh->chain)
1493         {
1494                 m.numtriangles = mesh->numtriangles;
1495                 m.numverts = mesh->numverts;
1496                 m.index = mesh->index;
1497                 m.texcoords[0] = &mesh->vertex->st[0];
1498                 if (fogenabled)
1499                 {
1500                         m.color = &svert[0].c[0];
1501                         m.colorstep = sizeof(surfvert_t);
1502                         if (softwaretransform_complexity)
1503                         {
1504                                 m.vertex = &svert[0].v[0];
1505                                 m.vertexstep = sizeof(surfvert_t);
1506                                 for (i = 0, sv = svert, v = mesh->vertex;i < m.numverts;i++, sv++, v++)
1507                                 {
1508                                         softwaretransform(v->v, sv->v);
1509                                         VectorSubtract(sv->v, r_origin, diff);
1510                                         ifog = 1 - exp(fogdensity/DotProduct(diff, diff));
1511                                         sv->c[0] = m.cr * ifog;
1512                                         sv->c[1] = m.cg * ifog;
1513                                         sv->c[2] = m.cb * ifog;
1514                                         sv->c[3] = m.ca;
1515                                 }
1516                         }
1517                         else
1518                         {
1519                                 m.vertex = &mesh->vertex->v[0];
1520                                 m.vertexstep = sizeof(surfvertex_t);
1521                                 for (i = 0, sv = svert, v = mesh->vertex;i < m.numverts;i++, sv++, v++)
1522                                 {
1523                                         VectorSubtract(v->v, r_origin, diff);
1524                                         ifog = 1 - exp(fogdensity/DotProduct(diff, diff));
1525                                         sv->c[0] = m.cr * ifog;
1526                                         sv->c[1] = m.cg * ifog;
1527                                         sv->c[2] = m.cb * ifog;
1528                                         sv->c[3] = m.ca;
1529                                 }
1530                         }
1531                 }
1532                 else
1533                 {
1534                         if (softwaretransform_complexity)
1535                         {
1536                                 m.vertex = &svert[0].v[0];
1537                                 m.vertexstep = sizeof(surfvert_t);
1538                                 for (i = 0, sv = svert, v = mesh->vertex;i < m.numverts;i++, sv++, v++)
1539                                         softwaretransform(v->v, sv->v);
1540                         }
1541                         else
1542                         {
1543                                 m.vertex = &mesh->vertex->v[0];
1544                                 m.vertexstep = sizeof(surfvertex_t);
1545                         }
1546                 }
1547                 R_Mesh_Draw(&m);
1548         }
1549 }
1550
1551 static void RSurfShader_Wall_Pass_Fog(msurface_t *surf)
1552 {
1553         int i;
1554         surfvertex_t *v;
1555         surfvert_t *sv;
1556         rmeshinfo_t m;
1557         surfmesh_t *mesh;
1558         vec3_t diff;
1559
1560         memset(&m, 0, sizeof(m));
1561         if (currentrenderentity->effects & EF_ADDITIVE)
1562                 m.transparent = true;
1563         else if (surf->currenttexture->fogtexture != NULL || currentrenderentity->alpha != 1)
1564                 m.transparent = true;
1565         else
1566                 m.transparent = false;
1567         m.blendfunc1 = GL_SRC_ALPHA;
1568         m.blendfunc2 = GL_ONE;
1569         m.color = &svert[0].c[0];
1570         m.colorstep = sizeof(surfvert_t);
1571         m.tex[0] = R_GetTexture(surf->currenttexture->fogtexture);
1572         m.texcoordstep[0] = sizeof(surfvertex_t);
1573         for (mesh = surf->mesh;mesh;mesh = mesh->chain)
1574         {
1575                 m.numtriangles = mesh->numtriangles;
1576                 m.numverts = mesh->numverts;
1577                 m.index = mesh->index;
1578                 m.texcoords[0] = &mesh->vertex->st[0];
1579                 if (softwaretransform_complexity)
1580                 {
1581                         m.vertex = &svert[0].v[0];
1582                         m.vertexstep = sizeof(surfvert_t);
1583                         for (i = 0, sv = svert, v = mesh->vertex;i < m.numverts;i++, sv++, v++)
1584                         {
1585                                 softwaretransform(v->v, sv->v);
1586                                 VectorSubtract(sv->v, r_origin, diff);
1587                                 sv->c[0] = fogcolor[0];
1588                                 sv->c[1] = fogcolor[1];
1589                                 sv->c[2] = fogcolor[2];
1590                                 sv->c[3] = currentrenderentity->alpha * exp(fogdensity/DotProduct(diff,diff));
1591                         }
1592                 }
1593                 else
1594                 {
1595                         m.vertex = &mesh->vertex->v[0];
1596                         m.vertexstep = sizeof(surfvertex_t);
1597                         for (i = 0, sv = svert, v = mesh->vertex;i < m.numverts;i++, sv++, v++)
1598                         {
1599                                 VectorSubtract(v->v, r_origin, diff);
1600                                 sv->c[0] = fogcolor[0];
1601                                 sv->c[1] = fogcolor[1];
1602                                 sv->c[2] = fogcolor[2];
1603                                 sv->c[3] = currentrenderentity->alpha * exp(fogdensity/DotProduct(diff,diff));
1604                         }
1605                 }
1606                 R_Mesh_Draw(&m);
1607         }
1608 }
1609
1610 static void RSurfShader_Wall_Fullbright(msurface_t *firstsurf)
1611 {
1612         msurface_t *surf;
1613         for (surf = firstsurf;surf;surf = surf->chain)
1614         {
1615                 c_brush_polys++;
1616                 RSurfShader_Wall_Pass_BaseFullbright(surf);
1617         }
1618         for (surf = firstsurf;surf;surf = surf->chain)
1619                 if (surf->currenttexture->glowtexture)
1620                         RSurfShader_Wall_Pass_Glow(surf);
1621         if (fogenabled)
1622                 for (surf = firstsurf;surf;surf = surf->chain)
1623                         RSurfShader_Wall_Pass_Fog(surf);
1624 }
1625
1626 static void RSurfShader_Wall_Vertex(msurface_t *firstsurf)
1627 {
1628         msurface_t *surf;
1629         for (surf = firstsurf;surf;surf = surf->chain)
1630         {
1631                 c_brush_polys++;
1632                 RSurfShader_Wall_Pass_BaseVertex(surf);
1633         }
1634         for (surf = firstsurf;surf;surf = surf->chain)
1635                 if (surf->currenttexture->glowtexture)
1636                         RSurfShader_Wall_Pass_Glow(surf);
1637         if (fogenabled)
1638                 for (surf = firstsurf;surf;surf = surf->chain)
1639                         RSurfShader_Wall_Pass_Fog(surf);
1640 }
1641
1642 static void RSurfShader_Wall_Lightmap(msurface_t *firstsurf)
1643 {
1644         msurface_t *surf;
1645         if (r_vertexsurfaces.integer)
1646         {
1647                 for (surf = firstsurf;surf;surf = surf->chain)
1648                 {
1649                         c_brush_polys++;
1650                         RSurfShader_Wall_Pass_BaseVertex(surf);
1651                 }
1652                 for (surf = firstsurf;surf;surf = surf->chain)
1653                         if (surf->currenttexture->glowtexture)
1654                                 RSurfShader_Wall_Pass_Glow(surf);
1655                 if (fogenabled)
1656                         for (surf = firstsurf;surf;surf = surf->chain)
1657                                 RSurfShader_Wall_Pass_Fog(surf);
1658         }
1659         else if (r_multitexture.integer)
1660         {
1661                 if (r_dlightmap.integer)
1662                 {
1663                         for (surf = firstsurf;surf;surf = surf->chain)
1664                         {
1665                                 c_brush_polys++;
1666                                 RSurfShader_Wall_Pass_BaseMTex(surf);
1667                         }
1668                         for (surf = firstsurf;surf;surf = surf->chain)
1669                                 if (surf->currenttexture->glowtexture)
1670                                         RSurfShader_Wall_Pass_Glow(surf);
1671                         if (fogenabled)
1672                                 for (surf = firstsurf;surf;surf = surf->chain)
1673                                         RSurfShader_Wall_Pass_Fog(surf);
1674                 }
1675                 else
1676                 {
1677                         for (surf = firstsurf;surf;surf = surf->chain)
1678                         {
1679                                 c_brush_polys++;
1680                                 RSurfShader_Wall_Pass_BaseMTex(surf);
1681                         }
1682                         for (surf = firstsurf;surf;surf = surf->chain)
1683                                 if (surf->dlightframe == r_framecount)
1684                                         RSurfShader_Wall_Pass_Light(surf);
1685                         for (surf = firstsurf;surf;surf = surf->chain)
1686                                 if (surf->currenttexture->glowtexture)
1687                                         RSurfShader_Wall_Pass_Glow(surf);
1688                         if (fogenabled)
1689                                 for (surf = firstsurf;surf;surf = surf->chain)
1690                                         RSurfShader_Wall_Pass_Fog(surf);
1691                 }
1692         }
1693         else if (firstsurf->currenttexture->fogtexture != NULL || currentrenderentity->alpha != 1 || currentrenderentity->effects & EF_ADDITIVE)
1694         {
1695                 for (surf = firstsurf;surf;surf = surf->chain)
1696                 {
1697                         c_brush_polys++;
1698                         RSurfShader_Wall_Pass_BaseVertex(surf);
1699                 }
1700                 for (surf = firstsurf;surf;surf = surf->chain)
1701                         if (surf->currenttexture->glowtexture)
1702                                 RSurfShader_Wall_Pass_Glow(surf);
1703                 if (fogenabled)
1704                         for (surf = firstsurf;surf;surf = surf->chain)
1705                                 RSurfShader_Wall_Pass_Fog(surf);
1706         }
1707         else
1708         {
1709                 if (r_dlightmap.integer)
1710                 {
1711                         for (surf = firstsurf;surf;surf = surf->chain)
1712                         {
1713                                 c_brush_polys++;
1714                                 RSurfShader_Wall_Pass_BaseTexture(surf);
1715                         }
1716                         for (surf = firstsurf;surf;surf = surf->chain)
1717                                 RSurfShader_Wall_Pass_BaseLightmap(surf);
1718                         for (surf = firstsurf;surf;surf = surf->chain)
1719                                 if (surf->currenttexture->glowtexture)
1720                                         RSurfShader_Wall_Pass_Glow(surf);
1721                         if (fogenabled)
1722                                 for (surf = firstsurf;surf;surf = surf->chain)
1723                                         RSurfShader_Wall_Pass_Fog(surf);
1724                 }
1725                 else
1726                 {
1727                         for (surf = firstsurf;surf;surf = surf->chain)
1728                         {
1729                                 c_brush_polys++;
1730                                 RSurfShader_Wall_Pass_BaseTexture(surf);
1731                         }
1732                         for (surf = firstsurf;surf;surf = surf->chain)
1733                                 RSurfShader_Wall_Pass_BaseLightmap(surf);
1734                         for (surf = firstsurf;surf;surf = surf->chain)
1735                                 if (surf->dlightframe == r_framecount)
1736                                         RSurfShader_Wall_Pass_Light(surf);
1737                         for (surf = firstsurf;surf;surf = surf->chain)
1738                                 if (surf->currenttexture->glowtexture)
1739                                         RSurfShader_Wall_Pass_Glow(surf);
1740                         if (fogenabled)
1741                                 for (surf = firstsurf;surf;surf = surf->chain)
1742                                         RSurfShader_Wall_Pass_Fog(surf);
1743                 }
1744         }
1745 }
1746
1747 /*
1748 =============================================================
1749
1750         WORLD MODEL
1751
1752 =============================================================
1753 */
1754
1755 static void R_SolidWorldNode (void)
1756 {
1757         if (r_viewleaf->contents != CONTENTS_SOLID)
1758         {
1759                 int portalstack;
1760                 mportal_t *p, *pstack[8192];
1761                 msurface_t *surf, **mark, **endmark;
1762                 mleaf_t *leaf;
1763                 // LordHavoc: portal-passage worldnode; follows portals leading
1764                 // outward from viewleaf, if a portal leads offscreen it is not
1765                 // followed, in indoor maps this can often cull a great deal of
1766                 // geometry away when pvs data is not present (useful with pvs as well)
1767
1768                 leaf = r_viewleaf;
1769                 leaf->worldnodeframe = r_framecount;
1770                 portalstack = 0;
1771         loc0:
1772                 c_leafs++;
1773
1774                 leaf->visframe = r_framecount;
1775
1776                 if (leaf->nummarksurfaces)
1777                 {
1778                         mark = leaf->firstmarksurface;
1779                         endmark = mark + leaf->nummarksurfaces;
1780                         do
1781                         {
1782                                 surf = *mark++;
1783                                 // make sure surfaces are only processed once
1784                                 if (surf->worldnodeframe == r_framecount)
1785                                         continue;
1786                                 surf->worldnodeframe = r_framecount;
1787                                 if (PlaneDist(r_origin, surf->plane) < surf->plane->dist)
1788                                 {
1789                                         if (surf->flags & SURF_PLANEBACK)
1790                                                 surf->visframe = r_framecount;
1791                                 }
1792                                 else
1793                                 {
1794                                         if (!(surf->flags & SURF_PLANEBACK))
1795                                                 surf->visframe = r_framecount;
1796                                 }
1797                         }
1798                         while (mark < endmark);
1799                 }
1800
1801                 // follow portals into other leafs
1802                 p = leaf->portals;
1803                 for (;p;p = p->next)
1804                 {
1805                         if (DotProduct(r_origin, p->plane.normal) < p->plane.dist)
1806                         {
1807                                 leaf = p->past;
1808                                 if (leaf->worldnodeframe != r_framecount)
1809                                 {
1810                                         leaf->worldnodeframe = r_framecount;
1811                                         if (leaf->contents != CONTENTS_SOLID)
1812                                         {
1813                                                 if (R_NotCulledBox(leaf->mins, leaf->maxs))
1814                                                 {
1815                                                         p->visframe = r_framecount;
1816                                                         pstack[portalstack++] = p;
1817                                                         goto loc0;
1818
1819         loc1:
1820                                                         p = pstack[--portalstack];
1821                                                 }
1822                                         }
1823                                 }
1824                         }
1825                 }
1826
1827                 if (portalstack)
1828                         goto loc1;
1829         }
1830         else
1831         {
1832                 mnode_t *nodestack[8192], *node = cl.worldmodel->nodes;
1833                 int nodestackpos = 0;
1834                 // LordHavoc: recursive descending worldnode; if portals are not
1835                 // available, this is a good last resort, can cull large amounts of
1836                 // geometry, but is more time consuming than portal-passage and renders
1837                 // things behind walls
1838
1839 loc2:
1840                 if (R_NotCulledBox(node->mins, node->maxs))
1841                 {
1842                         if (node->numsurfaces)
1843                         {
1844                                 msurface_t *surf = cl.worldmodel->surfaces + node->firstsurface, *surfend = surf + node->numsurfaces;
1845                                 if (PlaneDiff (r_origin, node->plane) < 0)
1846                                 {
1847                                         for (;surf < surfend;surf++)
1848                                         {
1849                                                 if (surf->flags & SURF_PLANEBACK)
1850                                                         surf->visframe = r_framecount;
1851                                         }
1852                                 }
1853                                 else
1854                                 {
1855                                         for (;surf < surfend;surf++)
1856                                         {
1857                                                 if (!(surf->flags & SURF_PLANEBACK))
1858                                                         surf->visframe = r_framecount;
1859                                         }
1860                                 }
1861                         }
1862
1863                         // recurse down the children
1864                         if (node->children[0]->contents >= 0)
1865                         {
1866                                 if (node->children[1]->contents >= 0)
1867                                 {
1868                                         if (nodestackpos < 8192)
1869                                                 nodestack[nodestackpos++] = node->children[1];
1870                                         node = node->children[0];
1871                                         goto loc2;
1872                                 }
1873                                 else
1874                                         ((mleaf_t *)node->children[1])->visframe = r_framecount;
1875                                 node = node->children[0];
1876                                 goto loc2;
1877                         }
1878                         else
1879                         {
1880                                 ((mleaf_t *)node->children[0])->visframe = r_framecount;
1881                                 if (node->children[1]->contents >= 0)
1882                                 {
1883                                         node = node->children[1];
1884                                         goto loc2;
1885                                 }
1886                                 else if (nodestackpos > 0)
1887                                 {
1888                                         ((mleaf_t *)node->children[1])->visframe = r_framecount;
1889                                         node = nodestack[--nodestackpos];
1890                                         goto loc2;
1891                                 }
1892                         }
1893                 }
1894                 else if (nodestackpos > 0)
1895                 {
1896                         node = nodestack[--nodestackpos];
1897                         goto loc2;
1898                 }
1899         }
1900 }
1901
1902 static int r_portalframecount = 0;
1903
1904 static void R_PVSWorldNode()
1905 {
1906         int portalstack, i;
1907         mportal_t *p, *pstack[8192];
1908         msurface_t *surf, **mark, **endmark;
1909         mleaf_t *leaf;
1910         qbyte *worldvis;
1911
1912         worldvis = Mod_LeafPVS (r_viewleaf, cl.worldmodel);
1913
1914         leaf = r_viewleaf;
1915         leaf->worldnodeframe = r_framecount;
1916         portalstack = 0;
1917 loc0:
1918         c_leafs++;
1919
1920         leaf->visframe = r_framecount;
1921
1922         if (leaf->nummarksurfaces)
1923         {
1924                 mark = leaf->firstmarksurface;
1925                 endmark = mark + leaf->nummarksurfaces;
1926                 do
1927                 {
1928                         surf = *mark++;
1929                         // make sure surfaces are only processed once
1930                         if (surf->worldnodeframe == r_framecount)
1931                                 continue;
1932                         surf->worldnodeframe = r_framecount;
1933                         if (PlaneDist(r_origin, surf->plane) < surf->plane->dist)
1934                         {
1935                                 if (surf->flags & SURF_PLANEBACK)
1936                                         surf->visframe = r_framecount;
1937                         }
1938                         else
1939                         {
1940                                 if (!(surf->flags & SURF_PLANEBACK))
1941                                         surf->visframe = r_framecount;
1942                         }
1943                 }
1944                 while (mark < endmark);
1945         }
1946
1947         // follow portals into other leafs
1948         for (p = leaf->portals;p;p = p->next)
1949         {
1950                 if (DotProduct(r_origin, p->plane.normal) < p->plane.dist)
1951                 {
1952                         leaf = p->past;
1953                         if (leaf->worldnodeframe != r_framecount)
1954                         {
1955                                 leaf->worldnodeframe = r_framecount;
1956                                 if (leaf->contents != CONTENTS_SOLID)
1957                                 {
1958                                         i = (leaf - cl.worldmodel->leafs) - 1;
1959                                         if (worldvis[i>>3] & (1<<(i&7)))
1960                                         {
1961                                                 if (R_NotCulledBox(leaf->mins, leaf->maxs))
1962                                                 {
1963                                                         pstack[portalstack++] = p;
1964                                                         goto loc0;
1965
1966 loc1:
1967                                                         p = pstack[--portalstack];
1968                                                 }
1969                                         }
1970                                 }
1971                         }
1972                 }
1973         }
1974
1975         if (portalstack)
1976                 goto loc1;
1977 }
1978
1979 Cshader_t Cshader_wall_vertex = {{NULL, RSurfShader_Wall_Vertex}, NULL};
1980 Cshader_t Cshader_wall_lightmap = {{NULL, RSurfShader_Wall_Lightmap}, NULL};
1981 Cshader_t Cshader_wall_fullbright = {{NULL, RSurfShader_Wall_Fullbright}, NULL};
1982 Cshader_t Cshader_water = {{NULL, RSurfShader_Water}, NULL};
1983 Cshader_t Cshader_sky = {{RSurfShader_Sky, NULL}, NULL};
1984
1985 int Cshader_count = 5;
1986 Cshader_t *Cshaders[5] =
1987 {
1988         &Cshader_wall_vertex,
1989         &Cshader_wall_lightmap,
1990         &Cshader_wall_fullbright,
1991         &Cshader_water,
1992         &Cshader_sky
1993 };
1994
1995 void R_PrepareSurfaces(void)
1996 {
1997         int i, alttextures, texframe, framecount;
1998         texture_t *t;
1999         model_t *model;
2000         msurface_t *surf;
2001
2002         for (i = 0;i < Cshader_count;i++)
2003                 Cshaders[i]->chain = NULL;
2004
2005         model = currentrenderentity->model;
2006         alttextures = currentrenderentity->frame != 0;
2007         texframe = (int)(cl.time * 5.0f);
2008
2009         for (i = 0;i < model->nummodelsurfaces;i++)
2010         {
2011                 surf = model->modelsortedsurfaces[i];
2012                 if (surf->visframe == r_framecount)
2013                 {
2014                         if (surf->insertframe != r_framecount)
2015                         {
2016                                 surf->insertframe = r_framecount;
2017                                 c_faces++;
2018                                 t = surf->texinfo->texture;
2019                                 if (t->animated)
2020                                 {
2021                                         framecount = t->anim_total[alttextures];
2022                                         if (framecount >= 2)
2023                                                 surf->currenttexture = t->anim_frames[alttextures][texframe % framecount];
2024                                         else
2025                                                 surf->currenttexture = t->anim_frames[alttextures][0];
2026                                 }
2027                                 else
2028                                         surf->currenttexture = t;
2029                         }
2030
2031                         surf->chain = surf->shader->chain;
2032                         surf->shader->chain = surf;
2033                 }
2034         }
2035 }
2036
2037 void R_DrawSurfaces (int type)
2038 {
2039         int                     i;
2040         Cshader_t       *shader;
2041
2042         for (i = 0;i < Cshader_count;i++)
2043         {
2044                 shader = Cshaders[i];
2045                 if (shader->chain && shader->shaderfunc[type])
2046                         shader->shaderfunc[type](shader->chain);
2047         }
2048 }
2049
2050 static float portalpointbuffer[256][3];
2051
2052 void R_DrawPortals(void)
2053 {
2054         int drawportals, i;
2055         mportal_t *portal, *endportal;
2056         mvertex_t *point;
2057         rmeshinfo_t m;
2058         drawportals = r_drawportals.integer;
2059
2060         if (drawportals < 1)
2061                 return;
2062
2063         memset(&m, 0, sizeof(m));
2064         m.transparent = true;
2065         m.blendfunc1 = GL_SRC_ALPHA;
2066         m.blendfunc2 = GL_ONE_MINUS_SRC_ALPHA;
2067         m.vertex = &portalpointbuffer[0][0];
2068         m.vertexstep = sizeof(float[3]);
2069         m.ca = 0.125;
2070         for (portal = cl.worldmodel->portals, endportal = portal + cl.worldmodel->numportals;portal < endportal;portal++)
2071         {
2072                 if (portal->visframe == r_portalframecount)
2073                 {
2074                         if (portal->numpoints <= 256)
2075                         {
2076                                 i = portal - cl.worldmodel->portals;
2077                                 m.cr = ((i & 0x0007) >> 0) * (1.0f / 7.0f);
2078                                 m.cg = ((i & 0x0038) >> 3) * (1.0f / 7.0f);
2079                                 m.cb = ((i & 0x01C0) >> 6) * (1.0f / 7.0f);
2080                                 point = portal->points;
2081                                 if (PlaneDiff(r_origin, (&portal->plane)) > 0)
2082                                 {
2083                                         for (i = portal->numpoints - 1;i >= 0;i--)
2084                                                 VectorCopy(point[i].position, portalpointbuffer[i]);
2085                                 }
2086                                 else
2087                                 {
2088                                         for (i = 0;i < portal->numpoints;i++)
2089                                                 VectorCopy(point[i].position, portalpointbuffer[i]);
2090                                 }
2091                                 R_Mesh_DrawPolygon(&m, portal->numpoints);
2092                         }
2093                 }
2094         }
2095 }
2096
2097 void R_SetupForBModelRendering(void)
2098 {
2099         int                     i;
2100         msurface_t      *surf;
2101         model_t         *model;
2102         vec3_t          modelorg;
2103
2104         // because bmodels can be reused, we have to decide which things to render
2105         // from scratch every time
2106
2107         model = currentrenderentity->model;
2108
2109         softwaretransformforentity (currentrenderentity);
2110         softwareuntransform(r_origin, modelorg);
2111
2112         for (i = 0;i < model->nummodelsurfaces;i++)
2113         {
2114                 surf = model->modelsortedsurfaces[i];
2115                 if (((surf->flags & SURF_PLANEBACK) == 0) == (PlaneDiff(modelorg, surf->plane) >= 0))
2116                         surf->visframe = r_framecount;
2117                 else
2118                         surf->visframe = -1;
2119                 surf->worldnodeframe = -1;
2120                 surf->lightframe = -1;
2121                 surf->dlightframe = -1;
2122                 surf->insertframe = -1;
2123         }
2124 }
2125
2126 void R_SetupForWorldRendering(void)
2127 {
2128         // there is only one instance of the world, but it can be rendered in
2129         // multiple stages
2130
2131         currentrenderentity = &cl_entities[0].render;
2132         softwaretransformidentity();
2133 }
2134
2135 static void R_SurfMarkLights (void)
2136 {
2137         int                     i;
2138         msurface_t      *surf;
2139
2140         if (r_dynamic.integer)
2141                 R_MarkLights();
2142
2143         if (!r_vertexsurfaces.integer)
2144         {
2145                 for (i = 0;i < currentrenderentity->model->nummodelsurfaces;i++)
2146                 {
2147                         surf = currentrenderentity->model->modelsortedsurfaces[i];
2148                         if (surf->visframe == r_framecount && surf->lightmaptexture != NULL)
2149                         {
2150                                 if (surf->cached_dlight
2151                                  || surf->cached_ambient != r_ambient.value
2152                                  || surf->cached_lightscalebit != lightscalebit)
2153                                         R_BuildLightMap(surf, false); // base lighting changed
2154                                 else if (r_dynamic.integer)
2155                                 {
2156                                         if  (surf->styles[0] != 255 && (d_lightstylevalue[surf->styles[0]] != surf->cached_light[0]
2157                                          || (surf->styles[1] != 255 && (d_lightstylevalue[surf->styles[1]] != surf->cached_light[1]
2158                                          || (surf->styles[2] != 255 && (d_lightstylevalue[surf->styles[2]] != surf->cached_light[2]
2159                                          || (surf->styles[3] != 255 && (d_lightstylevalue[surf->styles[3]] != surf->cached_light[3]))))))))
2160                                                 R_BuildLightMap(surf, false); // base lighting changed
2161                                         else if (surf->dlightframe == r_framecount && r_dlightmap.integer)
2162                                                 R_BuildLightMap(surf, true); // only dlights
2163                                 }
2164                         }
2165                 }
2166         }
2167 }
2168
2169 void R_MarkWorldLights(void)
2170 {
2171         R_SetupForWorldRendering();
2172         R_SurfMarkLights();
2173 }
2174
2175 /*
2176 =============
2177 R_DrawWorld
2178 =============
2179 */
2180 void R_DrawWorld (void)
2181 {
2182         R_SetupForWorldRendering();
2183
2184         if (r_viewleaf->contents == CONTENTS_SOLID || r_novis.integer || r_viewleaf->compressed_vis == NULL)
2185                 R_SolidWorldNode ();
2186         else
2187                 R_PVSWorldNode ();
2188 }
2189
2190 /*
2191 =================
2192 R_DrawBrushModel
2193 =================
2194 */
2195 void R_DrawBrushModelSky (void)
2196 {
2197         R_SetupForBModelRendering();
2198
2199         R_PrepareSurfaces();
2200         R_DrawSurfaces(SHADERSTAGE_SKY);
2201 }
2202
2203 void R_DrawBrushModelNormal (void)
2204 {
2205         c_bmodels++;
2206
2207         // have to flush queue because of possible lightmap reuse
2208         R_Mesh_Render();
2209
2210         R_SetupForBModelRendering();
2211
2212         R_SurfMarkLights();
2213
2214         R_PrepareSurfaces();
2215
2216         if (!skyrendermasked)
2217                 R_DrawSurfaces(SHADERSTAGE_SKY);
2218         R_DrawSurfaces(SHADERSTAGE_NORMAL);
2219 }
2220
2221 static void gl_surf_start(void)
2222 {
2223 }
2224
2225 static void gl_surf_shutdown(void)
2226 {
2227 }
2228
2229 static void gl_surf_newmap(void)
2230 {
2231 }
2232
2233 void GL_Surf_Init(void)
2234 {
2235         int i;
2236         dlightdivtable[0] = 4194304;
2237         for (i = 1;i < 32768;i++)
2238                 dlightdivtable[i] = 4194304 / (i << 7);
2239
2240         Cvar_RegisterVariable(&r_ambient);
2241         Cvar_RegisterVariable(&r_vertexsurfaces);
2242         Cvar_RegisterVariable(&r_dlightmap);
2243         Cvar_RegisterVariable(&r_drawportals);
2244         Cvar_RegisterVariable(&r_testvis);
2245         Cvar_RegisterVariable(&r_floatbuildlightmap);
2246
2247         R_RegisterModule("GL_Surf", gl_surf_start, gl_surf_shutdown, gl_surf_newmap);
2248 }
2249