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 byte 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         byte *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] = (byte) ((((cr - (int) bl[0]) * a) >> 8) + (int) bl[0]);
 266                                                                                 bl[1] = (byte) ((((cg - (int) bl[1]) * a) >> 8) + (int) bl[1]);
 267                                                                                 bl[2] = (byte) ((((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         byte    *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                         if (r_mergesky.integer)
 563                                 m.tex[0] = R_GetTexture(mergeskytexture);
 564                         else
 565                                 m.tex[0] = R_GetTexture(solidskytexture);
 566                         m.texcoords[0] = &svert[0].st[0];
 567                         m.texcoordstep[0] = sizeof(surfvert_t);
 568                         speedscale = cl.time * (8.0/128.0);
 569                         speedscale -= (int)speedscale;
 570                         for (i = 0, sv = svert, v = s->mesh.vertex;i < m.numverts;i++, sv++, v++)
 571                         {
 572                                 softwaretransform(v->v, sv->v);
 573                                 VectorSubtract (sv->v, r_origin, dir);
 574                                 // flatten the sphere
 575                                 dir[2] *= 3;
 576
 577                                 number = DotProduct(dir, dir);
 578                                 #if SLOWMATH
 579                                 length = 3.0f / sqrt(number);
 580                                 #else
 581                                 *((long *)&length) = 0x5f3759df - ((* (long *) &number) >> 1);
 582                                 length = 3.0f * (length * (1.5f - (number * 0.5f * length * length)));
 583                                 #endif
 584
 585                                 sv->st[0] = speedscale + dir[0] * length;
 586                                 sv->st[1] = speedscale + dir[1] * length;
 587                         }
 588                         R_Mesh_Draw(&m);
 589                 }
 590                 else
 591                 {
 592                         // flat color
 593                         memset(&m, 0, sizeof(m));
 594                         m.transparent = false;
 595                         m.blendfunc1 = GL_ONE;
 596                         m.blendfunc2 = GL_ZERO;
 597                         m.numtriangles = s->mesh.numtriangles;
 598                         m.numverts = s->mesh.numverts;
 599                         m.index = s->mesh.index;
 600                         m.cr = fogcolor[0];
 601                         m.cg = fogcolor[1];
 602                         m.cb = fogcolor[2];
 603                         m.ca = 1;
 604                         if (softwaretransform_complexity)
 605                         {
 606                                 m.vertex = &svert[0].v[0];
 607                                 m.vertexstep = sizeof(surfvert_t);
 608                                 for (i = 0, sv = svert, v = s->mesh.vertex;i < m.numverts;i++, sv++, v++)
 609                                         softwaretransform(v->v, sv->v);
 610                         }
 611                         else
 612                         {
 613                                 m.vertex = &s->mesh.vertex[0].v[0];
 614                                 m.vertexstep = sizeof(surfvertex_t);
 615                         }
 616                         R_Mesh_Draw(&m);
 617                 }
 618                 return false;
 619         }
 620         else if (stage == 1)
 621         {
 622                 if (skyrenderglquake && !r_mergesky.integer)
 623                 {
 624                         memset(&m, 0, sizeof(m));
 625                         m.transparent = false;
 626                         m.blendfunc1 = GL_SRC_ALPHA;
 627                         m.blendfunc2 = GL_ONE_MINUS_SRC_ALPHA;
 628                         m.numtriangles = s->mesh.numtriangles;
 629                         m.numverts = s->mesh.numverts;
 630                         m.index = s->mesh.index;
 631                         m.vertex = &svert[0].v[0];
 632                         m.vertexstep = sizeof(surfvert_t);
 633                         m.cr = 1;
 634                         m.cg = 1;
 635                         m.cb = 1;
 636                         m.ca = 1;
 637                         m.tex[0] = R_GetTexture(alphaskytexture);
 638                         m.texcoords[0] = &svert[0].st[0];
 639                         m.texcoordstep[0] = sizeof(surfvert_t);
 640                         speedscale = cl.time * (16.0/128.0);
 641                         speedscale -= (int)speedscale;
 642                         for (i = 0, sv = svert, v = s->mesh.vertex;i < m.numverts;i++, sv++, v++)
 643                         {
 644                                 softwaretransform(v->v, sv->v);
 645                                 VectorSubtract (sv->v, r_origin, dir);
 646                                 // flatten the sphere
 647                                 dir[2] *= 3;
 648
 649                                 number = DotProduct(dir, dir);
 650                                 #if SLOWMATH
 651                                 length = 3.0f / sqrt(number);
 652                                 #else
 653                                 *((long *)&length) = 0x5f3759df - ((* (long *) &number) >> 1);
 654                                 length = 3.0f * (length * (1.5f - (number * 0.5f * length * length)));
 655                                 #endif
 656
 657                                 sv->st[0] = speedscale + dir[0] * length;
 658                                 sv->st[1] = speedscale + dir[1] * length;
 659                         }
 660                         R_Mesh_Draw(&m);
 661                         return false;
 662                 }
 663                 return true;
 664         }
 665         else
 666                 return true;
 667 }
 668
 669 static int RSurf_Light(int *dlightbits, int numverts)
 670 {
 671         float           f;
 672         int                     i, l, lit = false;
 673         rdlight_t       *rd;
 674         vec3_t          lightorigin;
 675         surfvert_t      *sv;
 676         for (l = 0;l < r_numdlights;l++)
 677         {
 678                 if (dlightbits[l >> 5] & (1 << (l & 31)))
 679                 {
 680                         rd = &r_dlight[l];
 681                         // FIXME: support softwareuntransform here and make bmodels use hardware transform?
 682                         VectorCopy(rd->origin, lightorigin);
 683                         for (i = 0, sv = svert;i < numverts;i++, sv++)
 684                         {
 685                                 f = VectorDistance2(sv->v, lightorigin) + LIGHTOFFSET;
 686                                 if (f < rd->cullradius2)
 687                                 {
 688                                         f = (1.0f / f) - rd->lightsubtract;
 689                                         sv->c[0] += rd->light[0] * f;
 690                                         sv->c[1] += rd->light[1] * f;
 691                                         sv->c[2] += rd->light[2] * f;
 692                                         lit = true;
 693                                 }
 694                         }
 695                 }
 696         }
 697         return lit;
 698 }
 699
 700 static void RSurfShader_Water_Pass_Base(msurface_t *s)
 701 {
 702         int                             i;
 703         float                   diff[3], alpha, ifog;
 704         surfvertex_t    *v;
 705         surfvert_t              *sv;
 706         rmeshinfo_t             m;
 707         alpha = currentrenderentity->alpha * (s->flags & SURF_DRAWNOALPHA ? 1 : r_wateralpha.value);
 708
 709         memset(&m, 0, sizeof(m));
 710         if (alpha != 1 || s->currenttexture->fogtexture != NULL)
 711         {
 712                 m.transparent = true;
 713                 m.blendfunc1 = GL_SRC_ALPHA;
 714                 m.blendfunc2 = GL_ONE; //_MINUS_SRC_ALPHA;
 715         }
 716         else
 717         {
 718                 m.transparent = false;
 719                 m.blendfunc1 = GL_ONE;
 720                 m.blendfunc2 = GL_ZERO;
 721         }
 722         m.numtriangles = s->mesh.numtriangles;
 723         m.numverts = s->mesh.numverts;
 724         m.index = s->mesh.index;
 725         m.vertex = &svert[0].v[0];
 726         m.vertexstep = sizeof(surfvert_t);
 727         m.color = &svert[0].c[0];
 728         m.colorstep = sizeof(surfvert_t);
 729         m.tex[0] = R_GetTexture(s->currenttexture->texture);
 730         m.texcoords[0] = &svert[0].st[0];
 731         m.texcoordstep[0] = sizeof(surfvert_t);
 732         for (i = 0, sv = svert, v = s->mesh.vertex;i < m.numverts;i++, sv++, v++)
 733         {
 734                 softwaretransform(v->v, sv->v);
 735                 if (r_waterripple.value)
 736                         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];
 737                 if (s->flags & SURF_DRAWFULLBRIGHT)
 738                 {
 739                         sv->c[0] = 1;
 740                         sv->c[1] = 1;
 741                         sv->c[2] = 1;
 742                         sv->c[3] = alpha;
 743                 }
 744                 else
 745                 {
 746                         sv->c[0] = 0.5f;
 747                         sv->c[1] = 0.5f;
 748                         sv->c[2] = 0.5f;
 749                         sv->c[3] = alpha;
 750                 }
 751                 sv->st[0] = (v->st[0] + turbsin[(int)((v->st[1]*0.125f+cl.time) * TURBSCALE) & 255]) * (1.0f / 64.0f);
 752                 sv->st[1] = (v->st[1] + turbsin[(int)((v->st[0]*0.125f+cl.time) * TURBSCALE) & 255]) * (1.0f / 64.0f);
 753         }
 754         if (s->dlightframe == r_framecount && !(s->flags & SURF_DRAWFULLBRIGHT))
 755                 RSurf_Light(s->dlightbits, m.numverts);
 756         if (fogenabled/* && m.blendfunc2 == GL_ONE_MINUS_SRC_ALPHA*/)
 757         {
 758                 for (i = 0, sv = svert;i < m.numverts;i++, sv++)
 759                 {
 760                         VectorSubtract(sv->v, r_origin, diff);
 761                         ifog = 1 - exp(fogdensity/DotProduct(diff, diff));
 762                         sv->c[0] *= ifog;
 763                         sv->c[1] *= ifog;
 764                         sv->c[2] *= ifog;
 765                 }
 766         }
 767         R_Mesh_Draw(&m);
 768 }
 769
 770 static void RSurfShader_Water_Pass_Glow(msurface_t *s)
 771 {
 772         int                             i;
 773         float                   diff[3], alpha, ifog;
 774         surfvertex_t    *v;
 775         surfvert_t              *sv;
 776         rmeshinfo_t             m;
 777         alpha = currentrenderentity->alpha * (s->flags & SURF_DRAWNOALPHA ? 1 : r_wateralpha.value);
 778
 779         memset(&m, 0, sizeof(m));
 780         m.transparent = alpha != 1 || s->currenttexture->fogtexture != NULL;
 781         m.blendfunc1 = GL_SRC_ALPHA;
 782         m.blendfunc2 = GL_ONE;
 783         m.numtriangles = s->mesh.numtriangles;
 784         m.numverts = s->mesh.numverts;
 785         m.index = s->mesh.index;
 786         m.vertex = &svert[0].v[0];
 787         m.vertexstep = sizeof(surfvert_t);
 788         m.cr = 1;
 789         m.cg = 1;
 790         m.cb = 1;
 791         m.ca = alpha;
 792         m.tex[0] = R_GetTexture(s->currenttexture->glowtexture);
 793         m.texcoords[0] = &svert[0].st[0];
 794         m.texcoordstep[0] = sizeof(surfvert_t);
 795         if (fogenabled)
 796         {
 797                 m.color = &svert[0].c[0];
 798                 m.colorstep = sizeof(surfvert_t);
 799                 for (i = 0, sv = svert, v = s->mesh.vertex;i < m.numverts;i++, sv++, v++)
 800                 {
 801                         softwaretransform(v->v, sv->v);
 802                         if (r_waterripple.value)
 803                                 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];
 804                         sv->st[0] = (v->st[0] + turbsin[(int)((v->st[1]*0.125f+cl.time) * TURBSCALE) & 255]) * (1.0f / 64.0f);
 805                         sv->st[1] = (v->st[1] + turbsin[(int)((v->st[0]*0.125f+cl.time) * TURBSCALE) & 255]) * (1.0f / 64.0f);
 806                         VectorSubtract(sv->v, r_origin, diff);
 807                         ifog = 1 - exp(fogdensity/DotProduct(diff, diff));
 808                         sv->c[0] = m.cr * ifog;
 809                         sv->c[1] = m.cg * ifog;
 810                         sv->c[2] = m.cb * ifog;
 811                         sv->c[3] = m.ca;
 812                 }
 813         }
 814         else
 815         {
 816                 for (i = 0, sv = svert, v = s->mesh.vertex;i < m.numverts;i++, sv++, v++)
 817                 {
 818                         softwaretransform(v->v, sv->v);
 819                         if (r_waterripple.value)
 820                                 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];
 821                         sv->st[0] = (v->st[0] + turbsin[(int)((v->st[1]*0.125f+cl.time) * TURBSCALE) & 255]) * (1.0f / 64.0f);
 822                         sv->st[1] = (v->st[1] + turbsin[(int)((v->st[0]*0.125f+cl.time) * TURBSCALE) & 255]) * (1.0f / 64.0f);
 823                 }
 824         }
 825         R_Mesh_Draw(&m);
 826 }
 827
 828 static void RSurfShader_Water_Pass_Fog(msurface_t *s)
 829 {
 830         int                             i;
 831         float                   alpha;
 832         surfvertex_t    *v;
 833         surfvert_t              *sv;
 834         rmeshinfo_t             m;
 835         vec3_t                  diff;
 836         alpha = currentrenderentity->alpha * (s->flags & SURF_DRAWNOALPHA ? 1 : r_wateralpha.value);
 837
 838         memset(&m, 0, sizeof(m));
 839         m.transparent = alpha != 1 || s->currenttexture->fogtexture != NULL;
 840         m.blendfunc1 = GL_SRC_ALPHA;
 841         m.blendfunc2 = GL_ONE;
 842         m.numtriangles = s->mesh.numtriangles;
 843         m.numverts = s->mesh.numverts;
 844         m.index = s->mesh.index;
 845         m.vertex = &svert[0].v[0];
 846         m.vertexstep = sizeof(surfvert_t);
 847         m.color = &svert[0].c[0];
 848         m.colorstep = sizeof(surfvert_t);
 849         m.tex[0] = R_GetTexture(s->currenttexture->fogtexture);
 850         m.texcoords[0] = &svert[0].st[0];
 851         m.texcoordstep[0] = sizeof(surfvert_t);
 852
 853         for (i = 0, sv = svert, v = s->mesh.vertex;i < m.numverts;i++, sv++, v++)
 854         {
 855                 softwaretransform(v->v, sv->v);
 856                 if (r_waterripple.value)
 857                         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];
 858                 if (m.tex[0])
 859                 {
 860                         sv->st[0] = (v->st[0] + turbsin[(int)((v->st[1]*0.125f+cl.time) * TURBSCALE) & 255]) * (1.0f / 64.0f);
 861                         sv->st[1] = (v->st[1] + turbsin[(int)((v->st[0]*0.125f+cl.time) * TURBSCALE) & 255]) * (1.0f / 64.0f);
 862                 }
 863                 VectorSubtract(sv->v, r_origin, diff);
 864                 sv->c[0] = fogcolor[0];
 865                 sv->c[1] = fogcolor[1];
 866                 sv->c[2] = fogcolor[2];
 867                 sv->c[3] = alpha * exp(fogdensity/DotProduct(diff, diff));
 868         }
 869         R_Mesh_Draw(&m);
 870 }
 871
 872 static int RSurfShader_Water(int stage, msurface_t *s)
 873 {
 874         switch(stage)
 875         {
 876         case 0:
 877                 RSurfShader_Water_Pass_Base(s);
 878                 return false;
 879         case 1:
 880                 if (s->currenttexture->glowtexture)
 881                         RSurfShader_Water_Pass_Glow(s);
 882                 return false;
 883         case 2:
 884                 if (fogenabled && (s->flags & SURF_DRAWNOALPHA))
 885                 {
 886                         RSurfShader_Water_Pass_Fog(s);
 887                         return false;
 888                 }
 889                 else
 890                         return true;
 891         default:
 892                 return true;
 893         }
 894 }
 895
 896 static void RSurfShader_Wall_Pass_BaseMTex(msurface_t *s)
 897 {
 898         int                             i;
 899         float                   diff[3], ifog;
 900         surfvertex_t    *v;
 901         surfvert_t              *sv;
 902         rmeshinfo_t             m;
 903
 904         memset(&m, 0, sizeof(m));
 905         if (currentrenderentity->effects & EF_ADDITIVE)
 906         {
 907                 m.transparent = true;
 908                 m.blendfunc1 = GL_SRC_ALPHA;
 909                 m.blendfunc2 = GL_ONE;
 910         }
 911         else if (s->currenttexture->fogtexture != NULL || currentrenderentity->alpha != 1)
 912         {
 913                 m.transparent = true;
 914                 m.blendfunc1 = GL_SRC_ALPHA;
 915                 m.blendfunc2 = GL_ONE_MINUS_SRC_ALPHA;
 916         }
 917         else
 918         {
 919                 m.transparent = false;
 920                 m.blendfunc1 = GL_ONE;
 921                 m.blendfunc2 = GL_ZERO;
 922         }
 923         m.numtriangles = s->mesh.numtriangles;
 924         m.numverts = s->mesh.numverts;
 925         m.index = s->mesh.index;
 926         m.cr = m.cg = m.cb = (float) (1 << lightscalebit);
 927         m.ca = currentrenderentity->alpha;
 928         m.tex[0] = R_GetTexture(s->currenttexture->texture);
 929         m.tex[1] = R_GetTexture(s->lightmaptexture);
 930         m.texcoords[0] = &s->mesh.vertex->st[0];
 931         m.texcoords[1] = &s->mesh.vertex->uv[0];
 932         m.texcoordstep[0] = sizeof(surfvertex_t);
 933         m.texcoordstep[1] = sizeof(surfvertex_t);
 934         if (fogenabled)
 935         {
 936                 m.color = &svert[0].c[0];
 937                 m.colorstep = sizeof(surfvert_t);
 938                 if (softwaretransform_complexity)
 939                 {
 940                         m.vertex = &svert[0].v[0];
 941                         m.vertexstep = sizeof(surfvert_t);
 942                         for (i = 0, sv = svert, v = s->mesh.vertex;i < m.numverts;i++, sv++, v++)
 943                         {
 944                                 softwaretransform(v->v, sv->v);
 945                                 VectorSubtract(sv->v, r_origin, diff);
 946                                 ifog = 1 - exp(fogdensity/DotProduct(diff, diff));
 947                                 sv->c[0] = m.cr * ifog;
 948                                 sv->c[1] = m.cg * ifog;
 949                                 sv->c[2] = m.cb * ifog;
 950                                 sv->c[3] = m.ca;
 951                         }
 952                 }
 953                 else
 954                 {
 955                         m.vertex = &s->mesh.vertex->v[0];
 956                         m.vertexstep = sizeof(surfvertex_t);
 957                         for (i = 0, sv = svert, v = s->mesh.vertex;i < m.numverts;i++, sv++, v++)
 958                         {
 959                                 VectorSubtract(v->v, r_origin, diff);
 960                                 ifog = 1 - exp(fogdensity/DotProduct(diff, diff));
 961                                 sv->c[0] = m.cr * ifog;
 962                                 sv->c[1] = m.cg * ifog;
 963                                 sv->c[2] = m.cb * ifog;
 964                                 sv->c[3] = m.ca;
 965                         }
 966                 }
 967         }
 968         else
 969         {
 970                 if (softwaretransform_complexity)
 971                 {
 972                         m.vertex = &svert[0].v[0];
 973                         m.vertexstep = sizeof(surfvert_t);
 974                         for (i = 0, sv = svert, v = s->mesh.vertex;i < m.numverts;i++, sv++, v++)
 975                                 softwaretransform(v->v, sv->v);
 976                 }
 977                 else
 978                 {
 979                         m.vertex = &s->mesh.vertex->v[0];
 980                         m.vertexstep = sizeof(surfvertex_t);
 981                 }
 982         }
 983         R_Mesh_Draw(&m);
 984 }
 985
 986 static void RSurfShader_Wall_Pass_BaseTexture(msurface_t *s)
 987 {
 988         int                             i;
 989         surfvertex_t    *v;
 990         surfvert_t              *sv;
 991         rmeshinfo_t             m;
 992
 993         memset(&m, 0, sizeof(m));
 994         m.transparent = false;
 995         m.blendfunc1 = GL_ONE;
 996         m.blendfunc2 = GL_ZERO;
 997         m.numtriangles = s->mesh.numtriangles;
 998         m.numverts = s->mesh.numverts;
 999         m.index = s->mesh.index;
1000         m.cr = m.cg = m.cb = (float) (1 << v_overbrightbits.integer);
1001         m.ca = 1;
1002         m.tex[0] = R_GetTexture(s->currenttexture->texture);
1003         m.texcoords[0] = &s->mesh.vertex->st[0];
1004         m.texcoordstep[0] = sizeof(surfvertex_t);
1005         if (softwaretransform_complexity)
1006         {
1007                 m.vertex = &svert[0].v[0];
1008                 m.vertexstep = sizeof(surfvert_t);
1009                 for (i = 0, sv = svert, v = s->mesh.vertex;i < m.numverts;i++, sv++, v++)
1010                         softwaretransform(v->v, sv->v);
1011         }
1012         else
1013         {
1014                 m.vertex = &s->mesh.vertex->v[0];
1015                 m.vertexstep = sizeof(surfvertex_t);
1016         }
1017         R_Mesh_Draw(&m);
1018 }
1019
1020 static void RSurfShader_Wall_Pass_BaseLightmap(msurface_t *s)
1021 {
1022         int                             i;
1023         float                   diff[3], ifog;
1024         surfvertex_t    *v;
1025         surfvert_t              *sv;
1026         rmeshinfo_t             m;
1027
1028         memset(&m, 0, sizeof(m));
1029         m.transparent = false;
1030         m.blendfunc1 = GL_ZERO;
1031         m.blendfunc2 = GL_SRC_COLOR;
1032         m.numtriangles = s->mesh.numtriangles;
1033         m.numverts = s->mesh.numverts;
1034         m.index = s->mesh.index;
1035         m.cr = m.cg = m.cb = (float) (1 << v_overbrightbits.integer);
1036         m.ca = 1;
1037         m.tex[0] = R_GetTexture(s->lightmaptexture);
1038         m.texcoords[0] = &s->mesh.vertex->uv[0];
1039         m.texcoordstep[0] = sizeof(surfvertex_t);
1040         if (fogenabled)
1041         {
1042                 m.color = &svert[0].c[0];
1043                 m.colorstep = sizeof(surfvert_t);
1044                 if (softwaretransform_complexity)
1045                 {
1046                         m.vertex = &svert[0].v[0];
1047                         m.vertexstep = sizeof(surfvert_t);
1048                         for (i = 0, sv = svert, v = s->mesh.vertex;i < m.numverts;i++, sv++, v++)
1049                         {
1050                                 softwaretransform(v->v, sv->v);
1051                                 VectorSubtract(sv->v, r_origin, diff);
1052                                 ifog = 1 - exp(fogdensity/DotProduct(diff, diff));
1053                                 sv->c[0] = m.cr * ifog;
1054                                 sv->c[1] = m.cg * ifog;
1055                                 sv->c[2] = m.cb * ifog;
1056                                 sv->c[3] = m.ca;
1057                         }
1058                 }
1059                 else
1060                 {
1061                         m.vertex = &s->mesh.vertex->v[0];
1062                         m.vertexstep = sizeof(surfvertex_t);
1063                         for (i = 0, sv = svert, v = s->mesh.vertex;i < m.numverts;i++, sv++, v++)
1064                         {
1065                                 VectorSubtract(v->v, r_origin, diff);
1066                                 ifog = 1 - exp(fogdensity/DotProduct(diff, diff));
1067                                 sv->c[0] = m.cr * ifog;
1068                                 sv->c[1] = m.cg * ifog;
1069                                 sv->c[2] = m.cb * ifog;
1070                                 sv->c[3] = m.ca;
1071                         }
1072                 }
1073         }
1074         else
1075         {
1076                 if (softwaretransform_complexity)
1077                 {
1078                         m.vertex = &svert[0].v[0];
1079                         m.vertexstep = sizeof(surfvert_t);
1080                         for (i = 0, sv = svert, v = s->mesh.vertex;i < m.numverts;i++, sv++, v++)
1081                                 softwaretransform(v->v, sv->v);
1082                 }
1083                 else
1084                 {
1085                         m.vertex = &s->mesh.vertex->v[0];
1086                         m.vertexstep = sizeof(surfvertex_t);
1087                 }
1088         }
1089         R_Mesh_Draw(&m);
1090 }
1091
1092 static void RSurfShader_Wall_Pass_BaseVertex(msurface_t *s)
1093 {
1094         int                             i, size3;
1095         float                   c[3], base[3], scale, diff[3], ifog;
1096         surfvertex_t    *v;
1097         surfvert_t              *sv;
1098         rmeshinfo_t             m;
1099         byte                    *lm;
1100
1101         size3 = ((s->extents[0]>>4)+1)*((s->extents[1]>>4)+1)*3;
1102
1103         base[0] = base[1] = base[2] = r_ambient.value * (1.0f / 128.0f);
1104
1105         memset(&m, 0, sizeof(m));
1106         if (currentrenderentity->effects & EF_ADDITIVE)
1107         {
1108                 m.transparent = true;
1109                 m.blendfunc1 = GL_SRC_ALPHA;
1110                 m.blendfunc2 = GL_ONE;
1111         }
1112         else if (s->currenttexture->fogtexture != NULL || currentrenderentity->alpha != 1)
1113         {
1114                 m.transparent = true;
1115                 m.blendfunc1 = GL_SRC_ALPHA;
1116                 m.blendfunc2 = GL_ONE_MINUS_SRC_ALPHA;
1117         }
1118         else
1119         {
1120                 m.transparent = false;
1121                 m.blendfunc1 = GL_ONE;
1122                 m.blendfunc2 = GL_ZERO;
1123         }
1124         m.numtriangles = s->mesh.numtriangles;
1125         m.numverts = s->mesh.numverts;
1126         m.index = s->mesh.index;
1127         m.vertex = &svert[0].v[0];
1128         m.vertexstep = sizeof(surfvert_t);
1129         m.color = &svert[0].c[0];
1130         m.colorstep = sizeof(surfvert_t);
1131         m.tex[0] = R_GetTexture(s->currenttexture->texture);
1132         m.texcoords[0] = &s->mesh.vertex->st[0];
1133         m.texcoordstep[0] = sizeof(surfvertex_t);
1134         for (i = 0, sv = svert, v = s->mesh.vertex;i < m.numverts;i++, sv++, v++)
1135         {
1136                 softwaretransform(v->v, sv->v);
1137                 VectorCopy(base, c);
1138                 if (s->styles[0] != 255)
1139                 {
1140                         lm = s->samples + v->lightmapoffset;
1141                         scale = d_lightstylevalue[s->styles[0]] * (1.0f / 32768.0f);
1142                         VectorMA(c, scale, lm, c);
1143                         if (s->styles[1] != 255)
1144                         {
1145                                 lm += size3;
1146                                 scale = d_lightstylevalue[s->styles[1]] * (1.0f / 32768.0f);
1147                                 VectorMA(c, scale, lm, c);
1148                                 if (s->styles[2] != 255)
1149                                 {
1150                                         lm += size3;
1151                                         scale = d_lightstylevalue[s->styles[2]] * (1.0f / 32768.0f);
1152                                         VectorMA(c, scale, lm, c);
1153                                         if (s->styles[3] != 255)
1154                                         {
1155                                                 lm += size3;
1156                                                 scale = d_lightstylevalue[s->styles[3]] * (1.0f / 32768.0f);
1157                                                 VectorMA(c, scale, lm, c);
1158                                         }
1159                                 }
1160                         }
1161                 }
1162                 sv->c[0] = c[0];
1163                 sv->c[1] = c[1];
1164                 sv->c[2] = c[2];
1165                 sv->c[3] = currentrenderentity->alpha;
1166         }
1167         if (s->dlightframe == r_framecount)
1168                 RSurf_Light(s->dlightbits, m.numverts);
1169         if (fogenabled)
1170         {
1171                 for (i = 0, sv = svert, v = s->mesh.vertex;i < m.numverts;i++, sv++, v++)
1172                 {
1173                         VectorSubtract(sv->v, r_origin, diff);
1174                         ifog = 1 - exp(fogdensity/DotProduct(diff, diff));
1175                         sv->c[0] *= ifog;
1176                         sv->c[1] *= ifog;
1177                         sv->c[2] *= ifog;
1178                 }
1179         }
1180         R_Mesh_Draw(&m);
1181 }
1182
1183 static void RSurfShader_Wall_Pass_BaseFullbright(msurface_t *s)
1184 {
1185         int                             i;
1186         float                   diff[3], ifog;
1187         surfvertex_t    *v;
1188         surfvert_t              *sv;
1189         rmeshinfo_t             m;
1190
1191         memset(&m, 0, sizeof(m));
1192         if (currentrenderentity->effects & EF_ADDITIVE)
1193         {
1194                 m.transparent = true;
1195                 m.blendfunc1 = GL_SRC_ALPHA;
1196                 m.blendfunc2 = GL_ONE;
1197         }
1198         else if (s->currenttexture->fogtexture != NULL || currentrenderentity->alpha != 1)
1199         {
1200                 m.transparent = true;
1201                 m.blendfunc1 = GL_SRC_ALPHA;
1202                 m.blendfunc2 = GL_ONE_MINUS_SRC_ALPHA;
1203         }
1204         else
1205         {
1206                 m.transparent = false;
1207                 m.blendfunc1 = GL_ONE;
1208                 m.blendfunc2 = GL_ZERO;
1209         }
1210         m.numtriangles = s->mesh.numtriangles;
1211         m.numverts = s->mesh.numverts;
1212         m.index = s->mesh.index;
1213         m.vertex = &svert[0].v[0];
1214         m.vertexstep = sizeof(surfvert_t);
1215         m.tex[0] = R_GetTexture(s->currenttexture->texture);
1216         m.texcoords[0] = &s->mesh.vertex->st[0];
1217         m.texcoordstep[0] = sizeof(surfvertex_t);
1218         if (fogenabled)
1219         {
1220                 m.color = &svert[0].c[0];
1221                 m.colorstep = sizeof(surfvert_t);
1222                 for (i = 0, sv = svert, v = s->mesh.vertex;i < m.numverts;i++, sv++, v++)
1223                 {
1224                         softwaretransform(v->v, sv->v);
1225                         VectorSubtract(sv->v, r_origin, diff);
1226                         ifog = 1 - exp(fogdensity/DotProduct(diff, diff));
1227                         sv->c[0] = ifog;
1228                         sv->c[1] = ifog;
1229                         sv->c[2] = ifog;
1230                         sv->c[3] = currentrenderentity->alpha;
1231                 }
1232         }
1233         else
1234         {
1235                 m.cr = m.cg = m.cb = 1;
1236                 m.ca = currentrenderentity->alpha;
1237                 for (i = 0, sv = svert, v = s->mesh.vertex;i < m.numverts;i++, sv++, v++)
1238                         softwaretransform(v->v, sv->v);
1239         }
1240         R_Mesh_Draw(&m);
1241 }
1242
1243 static void RSurfShader_Wall_Pass_Light(msurface_t *s)
1244 {
1245         int                             i;
1246         float                   diff[3], ifog;
1247         surfvertex_t    *v;
1248         surfvert_t              *sv;
1249         rmeshinfo_t             m;
1250
1251         memset(&m, 0, sizeof(m));
1252         if (currentrenderentity->effects & EF_ADDITIVE)
1253                 m.transparent = true;
1254         else if (s->currenttexture->fogtexture != NULL || currentrenderentity->alpha != 1)
1255                 m.transparent = true;
1256         else
1257                 m.transparent = false;
1258         m.blendfunc1 = GL_SRC_ALPHA;
1259         m.blendfunc2 = GL_ONE;
1260         m.numtriangles = s->mesh.numtriangles;
1261         m.numverts = s->mesh.numverts;
1262         m.index = s->mesh.index;
1263         m.vertex = &svert[0].v[0];
1264         m.vertexstep = sizeof(surfvert_t);
1265         m.color = &svert[0].c[0];
1266         m.colorstep = sizeof(surfvert_t);
1267         m.tex[0] = R_GetTexture(s->currenttexture->texture);
1268         m.texcoords[0] = &s->mesh.vertex->st[0];
1269         m.texcoordstep[0] = sizeof(surfvertex_t);
1270         for (i = 0, sv = svert, v = s->mesh.vertex;i < m.numverts;i++, sv++, v++)
1271         {
1272                 softwaretransform(v->v, sv->v);
1273                 sv->c[0] = 0;
1274                 sv->c[1] = 0;
1275                 sv->c[2] = 0;
1276                 sv->c[3] = currentrenderentity->alpha;
1277         }
1278         if (RSurf_Light(s->dlightbits, m.numverts))
1279         {
1280                 if (fogenabled)
1281                 {
1282                         for (i = 0, sv = svert;i < m.numverts;i++, sv++)
1283                         {
1284                                 VectorSubtract(sv->v, r_origin, diff);
1285                                 ifog = 1 - exp(fogdensity/DotProduct(diff, diff));
1286                                 sv->c[0] *= ifog;
1287                                 sv->c[1] *= ifog;
1288                                 sv->c[2] *= ifog;
1289                         }
1290                 }
1291                 R_Mesh_Draw(&m);
1292         }
1293 }
1294
1295 static void RSurfShader_Wall_Pass_Glow(msurface_t *s)
1296 {
1297         int                             i;
1298         float                   diff[3], ifog;
1299         surfvertex_t    *v;
1300         surfvert_t              *sv;
1301         rmeshinfo_t             m;
1302
1303         memset(&m, 0, sizeof(m));
1304         if (currentrenderentity->effects & EF_ADDITIVE)
1305                 m.transparent = true;
1306         else if (s->currenttexture->fogtexture != NULL || currentrenderentity->alpha != 1)
1307                 m.transparent = true;
1308         else
1309                 m.transparent = false;
1310         m.blendfunc1 = GL_SRC_ALPHA;
1311         m.blendfunc2 = GL_ONE;
1312         m.numtriangles = s->mesh.numtriangles;
1313         m.numverts = s->mesh.numverts;
1314         m.index = s->mesh.index;
1315         m.cr = 1;
1316         m.cg = 1;
1317         m.cb = 1;
1318         m.ca = currentrenderentity->alpha;
1319         m.tex[0] = R_GetTexture(s->currenttexture->glowtexture);
1320         m.texcoords[0] = &s->mesh.vertex->st[0];
1321         m.texcoordstep[0] = sizeof(surfvertex_t);
1322         if (fogenabled)
1323         {
1324                 m.color = &svert[0].c[0];
1325                 m.colorstep = sizeof(surfvert_t);
1326                 if (softwaretransform_complexity)
1327                 {
1328                         m.vertex = &svert[0].v[0];
1329                         m.vertexstep = sizeof(surfvert_t);
1330                         for (i = 0, sv = svert, v = s->mesh.vertex;i < m.numverts;i++, sv++, v++)
1331                         {
1332                                 softwaretransform(v->v, sv->v);
1333                                 VectorSubtract(sv->v, r_origin, diff);
1334                                 ifog = 1 - exp(fogdensity/DotProduct(diff, diff));
1335                                 sv->c[0] = m.cr * ifog;
1336                                 sv->c[1] = m.cg * ifog;
1337                                 sv->c[2] = m.cb * ifog;
1338                                 sv->c[3] = m.ca;
1339                         }
1340                 }
1341                 else
1342                 {
1343                         m.vertex = &s->mesh.vertex->v[0];
1344                         m.vertexstep = sizeof(surfvertex_t);
1345                         for (i = 0, sv = svert, v = s->mesh.vertex;i < m.numverts;i++, sv++, v++)
1346                         {
1347                                 VectorSubtract(v->v, r_origin, diff);
1348                                 ifog = 1 - exp(fogdensity/DotProduct(diff, diff));
1349                                 sv->c[0] = m.cr * ifog;
1350                                 sv->c[1] = m.cg * ifog;
1351                                 sv->c[2] = m.cb * ifog;
1352                                 sv->c[3] = m.ca;
1353                         }
1354                 }
1355         }
1356         else
1357         {
1358                 if (softwaretransform_complexity)
1359                 {
1360                         m.vertex = &svert[0].v[0];
1361                         m.vertexstep = sizeof(surfvert_t);
1362                         for (i = 0, sv = svert, v = s->mesh.vertex;i < m.numverts;i++, sv++, v++)
1363                                 softwaretransform(v->v, sv->v);
1364                 }
1365                 else
1366                 {
1367                         m.vertex = &s->mesh.vertex->v[0];
1368                         m.vertexstep = sizeof(surfvertex_t);
1369                 }
1370         }
1371         R_Mesh_Draw(&m);
1372 }
1373
1374 static void RSurfShader_Wall_Pass_Fog(msurface_t *s)
1375 {
1376         int                             i;
1377         surfvertex_t    *v;
1378         surfvert_t              *sv;
1379         rmeshinfo_t             m;
1380         vec3_t                  diff;
1381
1382         memset(&m, 0, sizeof(m));
1383         if (currentrenderentity->effects & EF_ADDITIVE)
1384                 m.transparent = true;
1385         else if (s->currenttexture->fogtexture != NULL || currentrenderentity->alpha != 1)
1386                 m.transparent = true;
1387         else
1388                 m.transparent = false;
1389         m.blendfunc1 = GL_SRC_ALPHA;
1390         m.blendfunc2 = GL_ONE;
1391         m.numtriangles = s->mesh.numtriangles;
1392         m.numverts = s->mesh.numverts;
1393         m.index = s->mesh.index;
1394         m.color = &svert[0].c[0];
1395         m.colorstep = sizeof(surfvert_t);
1396         m.tex[0] = R_GetTexture(s->currenttexture->fogtexture);
1397         m.texcoords[0] = &s->mesh.vertex->st[0];
1398         m.texcoordstep[0] = sizeof(surfvertex_t);
1399         if (softwaretransform_complexity)
1400         {
1401                 m.vertex = &svert[0].v[0];
1402                 m.vertexstep = sizeof(surfvert_t);
1403                 for (i = 0, sv = svert, v = s->mesh.vertex;i < m.numverts;i++, sv++, v++)
1404                 {
1405                         softwaretransform(v->v, sv->v);
1406                         VectorSubtract(sv->v, r_origin, diff);
1407                         sv->c[0] = fogcolor[0];
1408                         sv->c[1] = fogcolor[1];
1409                         sv->c[2] = fogcolor[2];
1410                         sv->c[3] = currentrenderentity->alpha * exp(fogdensity/DotProduct(diff,diff));
1411                 }
1412         }
1413         else
1414         {
1415                 m.vertex = &s->mesh.vertex->v[0];
1416                 m.vertexstep = sizeof(surfvertex_t);
1417                 for (i = 0, sv = svert, v = s->mesh.vertex;i < m.numverts;i++, sv++, v++)
1418                 {
1419                         VectorSubtract(v->v, r_origin, diff);
1420                         sv->c[0] = fogcolor[0];
1421                         sv->c[1] = fogcolor[1];
1422                         sv->c[2] = fogcolor[2];
1423                         sv->c[3] = currentrenderentity->alpha * exp(fogdensity/DotProduct(diff,diff));
1424                 }
1425         }
1426         R_Mesh_Draw(&m);
1427 }
1428
1429 static int RSurfShader_Wall_Fullbright(int stage, msurface_t *s)
1430 {
1431         switch(stage)
1432         {
1433         case 0:
1434                 RSurfShader_Wall_Pass_BaseFullbright(s);
1435                 return false;
1436         case 1:
1437                 if (s->currenttexture->glowtexture)
1438                         RSurfShader_Wall_Pass_Glow(s);
1439                 return false;
1440         default:
1441                 return true;
1442         }
1443 }
1444
1445 static int RSurfShader_Wall_Vertex(int stage, msurface_t *s)
1446 {
1447         switch(stage)
1448         {
1449         case 0:
1450                 RSurfShader_Wall_Pass_BaseVertex(s);
1451                 return false;
1452         case 1:
1453                 if (s->currenttexture->glowtexture)
1454                         RSurfShader_Wall_Pass_Glow(s);
1455                 return false;
1456         default:
1457                 return true;
1458         }
1459 }
1460
1461 static int RSurfShader_Wall_Lightmap(int stage, msurface_t *s)
1462 {
1463         if (r_vertexsurfaces.integer)
1464         {
1465                 switch(stage)
1466                 {
1467                 case 0:
1468                         RSurfShader_Wall_Pass_BaseVertex(s);
1469                         return false;
1470                 case 1:
1471                         if (s->currenttexture->glowtexture)
1472                                 RSurfShader_Wall_Pass_Glow(s);
1473                         return false;
1474                 default:
1475                         return true;
1476                 }
1477         }
1478         else if (r_multitexture.integer)
1479         {
1480                 if (r_dlightmap.integer)
1481                 {
1482                         switch(stage)
1483                         {
1484                         case 0:
1485                                 RSurfShader_Wall_Pass_BaseMTex(s);
1486                                 return false;
1487                         case 1:
1488                                 if (s->currenttexture->glowtexture)
1489                                         RSurfShader_Wall_Pass_Glow(s);
1490                                 return false;
1491                         default:
1492                                 return true;
1493                         }
1494                 }
1495                 else
1496                 {
1497                         switch(stage)
1498                         {
1499                         case 0:
1500                                 RSurfShader_Wall_Pass_BaseMTex(s);
1501                                 return false;
1502                         case 1:
1503                                 if (s->dlightframe == r_framecount)
1504                                         RSurfShader_Wall_Pass_Light(s);
1505                                 return false;
1506                         case 2:
1507                                 if (s->currenttexture->glowtexture)
1508                                         RSurfShader_Wall_Pass_Glow(s);
1509                                 return false;
1510                         default:
1511                                 return true;
1512                         }
1513                 }
1514         }
1515         else if (s->currenttexture->fogtexture != NULL || currentrenderentity->alpha != 1 || currentrenderentity->effects & EF_ADDITIVE)
1516         {
1517                 switch(stage)
1518                 {
1519                 case 0:
1520                         RSurfShader_Wall_Pass_BaseVertex(s);
1521                         return false;
1522                 case 1:
1523                         if (s->currenttexture->glowtexture)
1524                                 RSurfShader_Wall_Pass_Glow(s);
1525                         return false;
1526                 default:
1527                         return true;
1528                 }
1529         }
1530         else
1531         {
1532                 if (r_dlightmap.integer)
1533                 {
1534                         switch(stage)
1535                         {
1536                         case 0:
1537                                 RSurfShader_Wall_Pass_BaseTexture(s);
1538                                 return false;
1539                         case 1:
1540                                 RSurfShader_Wall_Pass_BaseLightmap(s);
1541                                 return false;
1542                         case 2:
1543                                 if (s->currenttexture->glowtexture)
1544                                         RSurfShader_Wall_Pass_Glow(s);
1545                                 return false;
1546                         default:
1547                                 return true;
1548                         }
1549                 }
1550                 else
1551                 {
1552                         switch(stage)
1553                         {
1554                         case 0:
1555                                 RSurfShader_Wall_Pass_BaseTexture(s);
1556                                 return false;
1557                         case 1:
1558                                 RSurfShader_Wall_Pass_BaseLightmap(s);
1559                                 return false;
1560                         case 2:
1561                                 if (s->dlightframe == r_framecount)
1562                                         RSurfShader_Wall_Pass_Light(s);
1563                                 return false;
1564                         case 3:
1565                                 if (s->currenttexture->glowtexture)
1566                                         RSurfShader_Wall_Pass_Glow(s);
1567                                 return false;
1568                         default:
1569                                 return true;
1570                         }
1571                 }
1572         }
1573 }
1574
1575 static int RSurfShader_Wall_Fog(int stage, msurface_t *s)
1576 {
1577         if (stage == 0 && fogenabled)
1578         {
1579                 RSurfShader_Wall_Pass_Fog(s);
1580                 return false;
1581         }
1582         else
1583                 return true;
1584 }
1585
1586 /*
1587 =============================================================
1588
1589         WORLD MODEL
1590
1591 =============================================================
1592 */
1593
1594 static void RSurf_Callback(void *data, void *junk)
1595 {
1596         ((msurface_t *)data)->visframe = r_framecount;
1597 }
1598
1599 static void R_SolidWorldNode (void)
1600 {
1601         if (r_viewleaf->contents != CONTENTS_SOLID)
1602         {
1603                 int portalstack;
1604                 mportal_t *p, *pstack[8192];
1605                 msurface_t *surf, **mark, **endmark;
1606                 mleaf_t *leaf;
1607                 tinyplane_t plane;
1608                 // LordHavoc: portal-passage worldnode; follows portals leading
1609                 // outward from viewleaf, if a portal leads offscreen it is not
1610                 // followed, in indoor maps this can often cull a great deal of
1611                 // geometry away when pvs data is not present (useful with pvs as well)
1612
1613                 leaf = r_viewleaf;
1614                 leaf->worldnodeframe = r_framecount;
1615                 portalstack = 0;
1616         loc0:
1617                 c_leafs++;
1618
1619                 leaf->visframe = r_framecount;
1620
1621                 if (leaf->nummarksurfaces)
1622                 {
1623                         mark = leaf->firstmarksurface;
1624                         endmark = mark + leaf->nummarksurfaces;
1625                         if (r_ser.integer)
1626                         {
1627                                 do
1628                                 {
1629                                         surf = *mark++;
1630                                         // make sure surfaces are only processed once
1631                                         if (surf->worldnodeframe == r_framecount)
1632                                                 continue;
1633                                         surf->worldnodeframe = r_framecount;
1634                                         if (PlaneDist(r_origin, surf->plane) < surf->plane->dist)
1635                                         {
1636                                                 if (surf->flags & SURF_PLANEBACK)
1637                                                 {
1638                                                         VectorNegate(surf->plane->normal, plane.normal);
1639                                                         plane.dist = -surf->plane->dist;
1640                                                         R_Clip_AddPolygon((float *)surf->poly_verts, surf->poly_numverts, sizeof(float[3]), (surf->flags & SURF_CLIPSOLID) != 0, RSurf_Callback, surf, NULL, &plane);
1641                                                 }
1642                                         }
1643                                         else
1644                                         {
1645                                                 if (!(surf->flags & SURF_PLANEBACK))
1646                                                         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);
1647                                         }
1648                                 }
1649                                 while (mark < endmark);
1650                         }
1651                         else
1652                         {
1653                                 do
1654                                 {
1655                                         surf = *mark++;
1656                                         // make sure surfaces are only processed once
1657                                         if (surf->worldnodeframe == r_framecount)
1658                                                 continue;
1659                                         surf->worldnodeframe = r_framecount;
1660                                         if (PlaneDist(r_origin, surf->plane) < surf->plane->dist)
1661                                         {
1662                                                 if (surf->flags & SURF_PLANEBACK)
1663                                                         surf->visframe = r_framecount;
1664                                         }
1665                                         else
1666                                         {
1667                                                 if (!(surf->flags & SURF_PLANEBACK))
1668                                                         surf->visframe = r_framecount;
1669                                         }
1670                                 }
1671                                 while (mark < endmark);
1672                         }
1673                 }
1674
1675                 // follow portals into other leafs
1676                 p = leaf->portals;
1677                 for (;p;p = p->next)
1678                 {
1679                         if (DotProduct(r_origin, p->plane.normal) < p->plane.dist)
1680                         {
1681                                 leaf = p->past;
1682                                 if (leaf->worldnodeframe != r_framecount)
1683                                 {
1684                                         leaf->worldnodeframe = r_framecount;
1685                                         if (leaf->contents != CONTENTS_SOLID)
1686                                         {
1687                                                 if (R_NotCulledBox(leaf->mins, leaf->maxs))
1688                                                 {
1689                                                         p->visframe = r_framecount;
1690                                                         pstack[portalstack++] = p;
1691                                                         goto loc0;
1692
1693         loc1:
1694                                                         p = pstack[--portalstack];
1695                                                 }
1696                                         }
1697                                 }
1698                         }
1699                 }
1700
1701                 if (portalstack)
1702                         goto loc1;
1703         }
1704         else
1705         {
1706                 mnode_t *nodestack[8192], *node = cl.worldmodel->nodes;
1707                 int nodestackpos = 0;
1708                 // LordHavoc: recursive descending worldnode; if portals are not
1709                 // available, this is a good last resort, can cull large amounts of
1710                 // geometry, but is more time consuming than portal-passage and renders
1711                 // things behind walls
1712
1713 loc2:
1714                 if (R_NotCulledBox(node->mins, node->maxs))
1715                 {
1716                         if (node->numsurfaces)
1717                         {
1718                                 if (r_ser.integer)
1719                                 {
1720                                         msurface_t *surf = cl.worldmodel->surfaces + node->firstsurface, *surfend = surf + node->numsurfaces;
1721                                         tinyplane_t plane;
1722                                         if (PlaneDiff (r_origin, node->plane) < 0)
1723                                         {
1724                                                 for (;surf < surfend;surf++)
1725                                                 {
1726                                                         if (surf->flags & SURF_PLANEBACK)
1727                                                         {
1728                                                                 VectorNegate(surf->plane->normal, plane.normal);
1729                                                                 plane.dist = -surf->plane->dist;
1730                                                                 R_Clip_AddPolygon((float *)surf->poly_verts, surf->poly_numverts, sizeof(float[3]), surf->flags & SURF_CLIPSOLID, RSurf_Callback, surf, NULL, &plane);
1731                                                         }
1732                                                 }
1733                                         }
1734                                         else
1735                                         {
1736                                                 for (;surf < surfend;surf++)
1737                                                 {
1738                                                         if (!(surf->flags & SURF_PLANEBACK))
1739                                                                 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);
1740                                                 }
1741                                         }
1742                                 }
1743                                 else
1744                                 {
1745                                         msurface_t *surf = cl.worldmodel->surfaces + node->firstsurface, *surfend = surf + node->numsurfaces;
1746                                         if (PlaneDiff (r_origin, node->plane) < 0)
1747                                         {
1748                                                 for (;surf < surfend;surf++)
1749                                                 {
1750                                                         if (surf->flags & SURF_PLANEBACK)
1751                                                                 surf->visframe = r_framecount;
1752                                                 }
1753                                         }
1754                                         else
1755                                         {
1756                                                 for (;surf < surfend;surf++)
1757                                                 {
1758                                                         if (!(surf->flags & SURF_PLANEBACK))
1759                                                                 surf->visframe = r_framecount;
1760                                                 }
1761                                         }
1762                                 }
1763                         }
1764
1765                         // recurse down the children
1766                         if (node->children[0]->contents >= 0)
1767                         {
1768                                 if (node->children[1]->contents >= 0)
1769                                 {
1770                                         if (nodestackpos < 8192)
1771                                                 nodestack[nodestackpos++] = node->children[1];
1772                                         node = node->children[0];
1773                                         goto loc2;
1774                                 }
1775                                 else
1776                                         ((mleaf_t *)node->children[1])->visframe = r_framecount;
1777                                 node = node->children[0];
1778                                 goto loc2;
1779                         }
1780                         else
1781                         {
1782                                 ((mleaf_t *)node->children[0])->visframe = r_framecount;
1783                                 if (node->children[1]->contents >= 0)
1784                                 {
1785                                         node = node->children[1];
1786                                         goto loc2;
1787                                 }
1788                                 else if (nodestackpos > 0)
1789                                 {
1790                                         ((mleaf_t *)node->children[1])->visframe = r_framecount;
1791                                         node = nodestack[--nodestackpos];
1792                                         goto loc2;
1793                                 }
1794                         }
1795                 }
1796                 else if (nodestackpos > 0)
1797                 {
1798                         node = nodestack[--nodestackpos];
1799                         goto loc2;
1800                 }
1801         }
1802 }
1803
1804 static int r_portalframecount = 0;
1805
1806 static void R_PVSWorldNode()
1807 {
1808         int portalstack, i;
1809         mportal_t *p, *pstack[8192];
1810         msurface_t *surf, **mark, **endmark;
1811         mleaf_t *leaf;
1812         tinyplane_t plane;
1813         byte *worldvis;
1814
1815         worldvis = Mod_LeafPVS (r_viewleaf, cl.worldmodel);
1816
1817         leaf = r_viewleaf;
1818         leaf->worldnodeframe = r_framecount;
1819         portalstack = 0;
1820 loc0:
1821         c_leafs++;
1822
1823         leaf->visframe = r_framecount;
1824
1825         if (leaf->nummarksurfaces)
1826         {
1827                 mark = leaf->firstmarksurface;
1828                 endmark = mark + leaf->nummarksurfaces;
1829                 if (r_ser.integer)
1830                 {
1831                         do
1832                         {
1833                                 surf = *mark++;
1834                                 // make sure surfaces are only processed once
1835                                 if (surf->worldnodeframe == r_framecount)
1836                                         continue;
1837                                 surf->worldnodeframe = r_framecount;
1838                                 if (PlaneDist(r_origin, surf->plane) < surf->plane->dist)
1839                                 {
1840                                         if (surf->flags & SURF_PLANEBACK)
1841                                         {
1842                                                 VectorNegate(surf->plane->normal, plane.normal);
1843                                                 plane.dist = -surf->plane->dist;
1844                                                 R_Clip_AddPolygon((float *)surf->poly_verts, surf->poly_numverts, sizeof(float[3]), (surf->flags & SURF_CLIPSOLID) != 0, RSurf_Callback, surf, NULL, &plane);
1845                                         }
1846                                 }
1847                                 else
1848                                 {
1849                                         if (!(surf->flags & SURF_PLANEBACK))
1850                                                 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);
1851                                 }
1852                         }
1853                         while (mark < endmark);
1854                 }
1855                 else
1856                 {
1857                         do
1858                         {
1859                                 surf = *mark++;
1860                                 // make sure surfaces are only processed once
1861                                 if (surf->worldnodeframe == r_framecount)
1862                                         continue;
1863                                 surf->worldnodeframe = r_framecount;
1864                                 if (PlaneDist(r_origin, surf->plane) < surf->plane->dist)
1865                                 {
1866                                         if (surf->flags & SURF_PLANEBACK)
1867                                                 surf->visframe = r_framecount;
1868                                 }
1869                                 else
1870                                 {
1871                                         if (!(surf->flags & SURF_PLANEBACK))
1872                                                 surf->visframe = r_framecount;
1873                                 }
1874                         }
1875                         while (mark < endmark);
1876                 }
1877         }
1878
1879         // follow portals into other leafs
1880         for (p = leaf->portals;p;p = p->next)
1881         {
1882                 if (DotProduct(r_origin, p->plane.normal) < p->plane.dist)
1883                 {
1884                         leaf = p->past;
1885                         if (leaf->worldnodeframe != r_framecount)
1886                         {
1887                                 leaf->worldnodeframe = r_framecount;
1888                                 if (leaf->contents != CONTENTS_SOLID)
1889                                 {
1890                                         i = (leaf - cl.worldmodel->leafs) - 1;
1891                                         if (worldvis[i>>3] & (1<<(i&7)))
1892                                         {
1893                                                 if (R_NotCulledBox(leaf->mins, leaf->maxs))
1894                                                 {
1895                                                         pstack[portalstack++] = p;
1896                                                         goto loc0;
1897
1898 loc1:
1899                                                         p = pstack[--portalstack];
1900                                                 }
1901                                         }
1902                                 }
1903                         }
1904                 }
1905         }
1906
1907         if (portalstack)
1908                 goto loc1;
1909 }
1910
1911 Cshader_t Cshader_wall_vertex = {{NULL, RSurfShader_Wall_Vertex, RSurfShader_Wall_Fog}, NULL};
1912 Cshader_t Cshader_wall_lightmap = {{NULL, RSurfShader_Wall_Lightmap, RSurfShader_Wall_Fog}, NULL};
1913 Cshader_t Cshader_wall_fullbright = {{NULL, RSurfShader_Wall_Fullbright, RSurfShader_Wall_Fog}, NULL};
1914 Cshader_t Cshader_water = {{NULL, RSurfShader_Water, NULL}, NULL};
1915 Cshader_t Cshader_sky = {{RSurfShader_Sky, NULL, NULL}, NULL};
1916
1917 int Cshader_count = 5;
1918 Cshader_t *Cshaders[5] =
1919 {
1920         &Cshader_wall_vertex,
1921         &Cshader_wall_lightmap,
1922         &Cshader_wall_fullbright,
1923         &Cshader_water,
1924         &Cshader_sky
1925 };
1926
1927 void R_PrepareSurfaces(void)
1928 {
1929         int i;
1930         texture_t *t;
1931         model_t *model;
1932         msurface_t *surf;
1933
1934         for (i = 0;i < Cshader_count;i++)
1935                 Cshaders[i]->chain = NULL;
1936
1937         model = currentrenderentity->model;
1938
1939         for (i = 0;i < model->nummodelsurfaces;i++)
1940         {
1941                 surf = model->modelsortedsurfaces[i];
1942                 if (surf->visframe == r_framecount)
1943                 {
1944                         if (surf->insertframe != r_framecount)
1945                         {
1946                                 surf->insertframe = r_framecount;
1947                                 c_faces++;
1948                                 // manually inlined R_TextureAnimation
1949                                 //t = R_TextureAnimation(surf->texinfo->texture);
1950                                 t = surf->texinfo->texture;
1951                                 if (t->alternate_anims != NULL && currentrenderentity->frame)
1952                                         t = t->alternate_anims;
1953                                 if (t->anim_total >= 2)
1954                                         t = t->anim_frames[(int)(cl.time * 5.0f) % t->anim_total];
1955                                 surf->currenttexture = t;
1956                         }
1957
1958                         surf->chain = surf->shader->chain;
1959                         surf->shader->chain = surf;
1960                 }
1961         }
1962 }
1963
1964 void R_DrawSurfaces (int type)
1965 {
1966         int                     i, stage;
1967         msurface_t      *surf;
1968         Cshader_t       *shader;
1969
1970         for (i = 0;i < Cshader_count;i++)
1971         {
1972                 shader = Cshaders[i];
1973                 if (shader->chain && shader->shaderfunc[type])
1974                         for (stage = 0;stage < 1000;stage++)
1975                                 for (surf = shader->chain;surf;surf = surf->chain)
1976                                         if (shader->shaderfunc[type](stage, surf))
1977                                                 goto done;
1978 done:;
1979         }
1980 }
1981
1982 static float portalpointbuffer[256][3];
1983
1984 void R_DrawPortals(void)
1985 {
1986         int drawportals, i;
1987 //      mleaf_t *leaf, *endleaf;
1988         mportal_t *portal, *endportal;
1989         mvertex_t *point/*, *endpoint*/;
1990         rmeshinfo_t m;
1991         drawportals = r_drawportals.integer;
1992         if (drawportals < 1)
1993                 return;
1994         /*
1995         leaf = cl.worldmodel->leafs;
1996         endleaf = leaf + cl.worldmodel->numleafs;
1997         for (;leaf < endleaf;leaf++)
1998         {
1999                 if (leaf->visframe == r_framecount && leaf->portals)
2000                 {
2001                         i = leaf - cl.worldmodel->leafs;
2002                         r = (i & 0x0007) << 5;
2003                         g = (i & 0x0038) << 2;
2004                         b = (i & 0x01C0) >> 1;
2005                         portal = leaf->portals;
2006                         while (portal)
2007                         {
2008                                 transpolybegin(0, 0, 0, TPOLYTYPE_ALPHA);
2009                                 point = portal->points + portal->numpoints - 1;
2010                                 endpoint = portal->points;
2011                                 for (;point >= endpoint;point--)
2012                                         transpolyvertub(point->position[0], point->position[1], point->position[2], 0, 0, r, g, b, 32);
2013                                 transpolyend();
2014                                 portal = portal->next;
2015                         }
2016                 }
2017         }
2018         */
2019         memset(&m, 0, sizeof(m));
2020         m.transparent = true;
2021         m.blendfunc1 = GL_SRC_ALPHA;
2022         m.blendfunc2 = GL_ONE_MINUS_SRC_ALPHA;
2023         m.vertex = &portalpointbuffer[0][0];
2024         m.vertexstep = sizeof(float[3]);
2025         m.ca = 0.125;
2026         for (portal = cl.worldmodel->portals, endportal = portal + cl.worldmodel->numportals;portal < endportal;portal++)
2027         {
2028                 if (portal->visframe == r_portalframecount)
2029                 {
2030                         if (portal->numpoints <= 256)
2031                         {
2032                                 i = portal - cl.worldmodel->portals;
2033                                 m.cr = ((i & 0x0007) >> 0) * (1.0f / 7.0f);
2034                                 m.cg = ((i & 0x0038) >> 3) * (1.0f / 7.0f);
2035                                 m.cb = ((i & 0x01C0) >> 6) * (1.0f / 7.0f);
2036                                 point = portal->points;
2037                                 if (PlaneDiff(r_origin, (&portal->plane)) > 0)
2038                                 {
2039                                         for (i = portal->numpoints - 1;i >= 0;i--)
2040                                                 VectorCopy(point[i].position, portalpointbuffer[i]);
2041                                 }
2042                                 else
2043                                 {
2044                                         for (i = 0;i < portal->numpoints;i++)
2045                                                 VectorCopy(point[i].position, portalpointbuffer[i]);
2046                                 }
2047                                 R_Mesh_DrawPolygon(&m, portal->numpoints);
2048                         }
2049                 }
2050         }
2051 }
2052
2053 void R_SetupForBModelRendering(void)
2054 {
2055         int                     i;
2056         msurface_t      *s;
2057         model_t         *model;
2058         vec3_t          modelorg;
2059
2060         // because bmodels can be reused, we have to decide which things to render
2061         // from scratch every time
2062
2063         model = currentrenderentity->model;
2064
2065         softwaretransformforentity (currentrenderentity);
2066         softwareuntransform(r_origin, modelorg);
2067
2068         for (i = 0;i < model->nummodelsurfaces;i++)
2069         {
2070                 s = model->modelsortedsurfaces[i];
2071                 if (((s->flags & SURF_PLANEBACK) == 0) == (PlaneDiff(modelorg, s->plane) >= 0))
2072                         s->visframe = r_framecount;
2073                 else
2074                         s->visframe = -1;
2075                 s->worldnodeframe = -1;
2076                 s->lightframe = -1;
2077                 s->dlightframe = -1;
2078                 s->insertframe = -1;
2079         }
2080 }
2081
2082 void R_SetupForWorldRendering(void)
2083 {
2084         // there is only one instance of the world, but it can be rendered in
2085         // multiple stages
2086
2087         currentrenderentity = &cl_entities[0].render;
2088         softwaretransformidentity();
2089 }
2090
2091 static void R_SurfMarkLights (void)
2092 {
2093         int                     i;
2094         msurface_t      *s;
2095
2096         if (r_dynamic.integer)
2097                 R_MarkLights();
2098
2099         if (!r_vertexsurfaces.integer)
2100         {
2101                 for (i = 0;i < currentrenderentity->model->nummodelsurfaces;i++)
2102                 {
2103                         s = currentrenderentity->model->modelsortedsurfaces[i];
2104                         if (s->visframe == r_framecount && s->lightmaptexture != NULL)
2105                         {
2106                                 if (s->cached_dlight
2107                                  || s->cached_ambient != r_ambient.value
2108                                  || s->cached_lightscalebit != lightscalebit)
2109                                         R_BuildLightMap(s, false); // base lighting changed
2110                                 else if (r_dynamic.integer)
2111                                 {
2112                                         if  (s->styles[0] != 255 && (d_lightstylevalue[s->styles[0]] != s->cached_light[0]
2113                                          || (s->styles[1] != 255 && (d_lightstylevalue[s->styles[1]] != s->cached_light[1]
2114                                          || (s->styles[2] != 255 && (d_lightstylevalue[s->styles[2]] != s->cached_light[2]
2115                                          || (s->styles[3] != 255 && (d_lightstylevalue[s->styles[3]] != s->cached_light[3]))))))))
2116                                         //if (s->cached_light[0] != d_lightstylevalue[s->styles[0]]
2117                                         // || s->cached_light[1] != d_lightstylevalue[s->styles[1]]
2118                                         // || s->cached_light[2] != d_lightstylevalue[s->styles[2]]
2119                                         // || s->cached_light[3] != d_lightstylevalue[s->styles[3]])
2120                                                 R_BuildLightMap(s, false); // base lighting changed
2121                                         else if (s->dlightframe == r_framecount && r_dlightmap.integer)
2122                                                 R_BuildLightMap(s, true); // only dlights
2123                                 }
2124                         }
2125                 }
2126         }
2127 }
2128
2129 void R_MarkWorldLights(void)
2130 {
2131         R_SetupForWorldRendering();
2132         R_SurfMarkLights();
2133 }
2134
2135 /*
2136 =============
2137 R_DrawWorld
2138 =============
2139 */
2140 void R_DrawWorld (void)
2141 {
2142         R_SetupForWorldRendering();
2143
2144         if (r_viewleaf->contents == CONTENTS_SOLID || r_novis.integer || r_viewleaf->compressed_vis == NULL)
2145                 R_SolidWorldNode ();
2146         else
2147                 R_PVSWorldNode ();
2148 }
2149
2150 /*
2151 =================
2152 R_DrawBrushModel
2153 =================
2154 */
2155 void R_DrawBrushModelSky (void)
2156 {
2157         R_SetupForBModelRendering();
2158
2159         R_PrepareSurfaces();
2160         R_DrawSurfaces(SHADERSTAGE_SKY);
2161 }
2162
2163 void R_DrawBrushModelNormal (void)
2164 {
2165         c_bmodels++;
2166
2167         // have to flush queue because of possible lightmap reuse
2168         R_Mesh_Render();
2169
2170         R_SetupForBModelRendering();
2171
2172         R_SurfMarkLights();
2173
2174         R_PrepareSurfaces();
2175
2176         if (!skyrendermasked)
2177                 R_DrawSurfaces(SHADERSTAGE_SKY);
2178         R_DrawSurfaces(SHADERSTAGE_NORMAL);
2179         R_DrawSurfaces(SHADERSTAGE_FOG);
2180 }