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