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 extern int                     skytexturenum;
  25
  26 int             lightmap_textures;
  27
  28 signed blocklights[18*18*3]; // LordHavoc: *3 for colored lighting
  29
  30 // LordHavoc: skinny but tall lightmaps for quicker subimage uploads
  31 #define BLOCK_WIDTH             128
  32 #define BLOCK_HEIGHT    128
  33 // LordHavoc: increased lightmap limit from 64 to 1024
  34 #define MAX_LIGHTMAPS   1024
  35 #define LIGHTMAPSIZE    (BLOCK_WIDTH*BLOCK_HEIGHT*4)
  36
  37 int                     active_lightmaps;
  38
  39 short allocated[MAX_LIGHTMAPS][BLOCK_WIDTH];
  40
  41 byte *lightmaps[MAX_LIGHTMAPS];
  42 short lightmapupdate[MAX_LIGHTMAPS][2];
  43
  44 int lightmapalign, lightmapalignmask; // LordHavoc: NVIDIA's broken subimage fix, see BuildLightmaps for notes
  45 cvar_t gl_lightmapalign = {"gl_lightmapalign", "4"};
  46 cvar_t gl_lightmaprgba = {"gl_lightmaprgba", "0"};
  47 cvar_t gl_nosubimagefragments = {"gl_nosubimagefragments", "0"};
  48 cvar_t gl_nosubimage = {"gl_nosubimage", "0"};
  49 cvar_t r_ambient = {"r_ambient", "0"};
  50 cvar_t gl_vertex = {"gl_vertex", "0"};
  51 cvar_t gl_texsort = {"gl_texsort", "1"};
  52 //cvar_t gl_funnywalls = {"gl_funnywalls", "0"}; // LordHavoc: see BuildSurfaceDisplayList
  53
  54 qboolean lightmaprgba, nosubimagefragments, nosubimage, skyisvisible;
  55 int lightmapbytes;
  56
  57 extern qboolean gl_arrays;
  58
  59 extern int r_dlightframecount;
  60
  61 void gl_surf_start()
  62 {
  63 }
  64
  65 void gl_surf_shutdown()
  66 {
  67 }
  68
  69 void GL_Surf_Init()
  70 {
  71         int i;
  72         for (i = 0;i < MAX_LIGHTMAPS;i++)
  73                 lightmaps[i] = NULL;
  74         Cvar_RegisterVariable(&gl_lightmapalign);
  75         Cvar_RegisterVariable(&gl_lightmaprgba);
  76         Cvar_RegisterVariable(&gl_nosubimagefragments);
  77         Cvar_RegisterVariable(&gl_nosubimage);
  78         Cvar_RegisterVariable(&r_ambient);
  79 //      Cvar_RegisterVariable(&gl_funnywalls);
  80         Cvar_RegisterVariable(&gl_vertex);
  81         Cvar_RegisterVariable(&gl_texsort);
  82         // check if it's the glquake minigl driver
  83         if (strncasecmp(gl_vendor,"3Dfx",4)==0)
  84         if (!gl_arrays)
  85         {
  86 //              Cvar_SetValue("gl_nosubimagefragments", 1);
  87 //              Cvar_SetValue("gl_nosubimage", 1);
  88                 Cvar_SetValue("gl_lightmode", 0);
  89         }
  90
  91         R_RegisterModule("GL_Surf", gl_surf_start, gl_surf_shutdown);
  92 }
  93
  94 extern qboolean lighthalf;
  95 /*
  96 ===============
  97 R_BuildLightMap
  98
  99 Combine and scale multiple lightmaps into the 8.8 format in blocklights
 100 ===============
 101 */
 102 void R_BuildLightMap (msurface_t *surf, byte *dest, int stride)
 103 {
 104         int                     smax, tmax;
 105         int                     t;
 106         int                     i, j, size;
 107         byte            *lightmap;
 108         int                     scale;
 109         int                     maps;
 110         int                     *bl;
 111
 112         surf->cached_lighthalf = lighthalf;
 113         surf->cached_ambient = r_ambient.value;
 114
 115         smax = (surf->extents[0]>>4)+1;
 116         tmax = (surf->extents[1]>>4)+1;
 117         size = smax*tmax;
 118         lightmap = surf->samples;
 119
 120 // set to full bright if no light data
 121         if (currententity->effects & EF_FULLBRIGHT || !cl.worldmodel->lightdata)
 122         {
 123                 bl = blocklights;
 124                 for (i=0 ; i<size ; i++)
 125                 {
 126                         *bl++ = 255*256;
 127                         *bl++ = 255*256;
 128                         *bl++ = 255*256;
 129                 }
 130         }
 131         else
 132         {
 133 // clear to no light
 134                 bl = blocklights;
 135                 j = r_ambient.value * 512.0f; // would be 256.0f logically, but using 512.0f to match winquake style
 136                 for (i=0 ; i<size ; i++)
 137                 {
 138                         *bl++ = j;
 139                         *bl++ = j;
 140                         *bl++ = j;
 141                 }
 142
 143 // add all the lightmaps
 144                 if (lightmap)
 145                         for (maps = 0;maps < MAXLIGHTMAPS && surf->styles[maps] != 255;maps++)
 146                         {
 147                                 scale = d_lightstylevalue[surf->styles[maps]];
 148                                 surf->cached_light[maps] = scale;       // 8.8 fraction
 149                                 bl = blocklights;
 150                                 for (i=0 ; i<size ; i++)
 151                                 {
 152                                         *bl++ += *lightmap++ * scale;
 153                                         *bl++ += *lightmap++ * scale;
 154                                         *bl++ += *lightmap++ * scale;
 155                                 }
 156                         }
 157         }
 158         stride -= (smax*lightmapbytes);
 159         bl = blocklights;
 160         if (lighthalf)
 161         {
 162                 // LordHavoc: I shift down by 8 unlike GLQuake's 7,
 163                 // the image is brightened as a processing pass
 164                 if (lightmaprgba)
 165                 {
 166                         for (i=0 ; i<tmax ; i++, dest += stride)
 167                         {
 168                                 for (j=0 ; j<smax ; j++)
 169                                 {
 170                                         t = *bl++ >> 8;if (t > 255) t = 255;else if (t < 0) t = 0;*dest++ = t;
 171                                         t = *bl++ >> 8;if (t > 255) t = 255;else if (t < 0) t = 0;*dest++ = t;
 172                                         t = *bl++ >> 8;if (t > 255) t = 255;else if (t < 0) t = 0;*dest++ = t;
 173                                         *dest++ = 255;
 174                                 }
 175                         }
 176                 }
 177                 else
 178                 {
 179                         for (i=0 ; i<tmax ; i++, dest += stride)
 180                         {
 181                                 for (j=0 ; j<smax ; j++)
 182                                 {
 183                                         t = *bl++ >> 8;if (t > 255) t = 255;else if (t < 0) t = 0;*dest++ = t;
 184                                         t = *bl++ >> 8;if (t > 255) t = 255;else if (t < 0) t = 0;*dest++ = t;
 185                                         t = *bl++ >> 8;if (t > 255) t = 255;else if (t < 0) t = 0;*dest++ = t;
 186                                 }
 187                         }
 188                 }
 189         }
 190         else
 191         {
 192                 if (lightmaprgba)
 193                 {
 194                         for (i=0 ; i<tmax ; i++, dest += stride)
 195                         {
 196                                 for (j=0 ; j<smax ; j++)
 197                                 {
 198                                         t = *bl++ >> 7;if (t > 255) t = 255;else if (t < 0) t = 0;*dest++ = t;
 199                                         t = *bl++ >> 7;if (t > 255) t = 255;else if (t < 0) t = 0;*dest++ = t;
 200                                         t = *bl++ >> 7;if (t > 255) t = 255;else if (t < 0) t = 0;*dest++ = t;
 201                                         *dest++ = 255;
 202                                 }
 203                         }
 204                 }
 205                 else
 206                 {
 207                         for (i=0 ; i<tmax ; i++, dest += stride)
 208                         {
 209                                 for (j=0 ; j<smax ; j++)
 210                                 {
 211                                         t = *bl++ >> 7;if (t > 255) t = 255;else if (t < 0) t = 0;*dest++ = t;
 212                                         t = *bl++ >> 7;if (t > 255) t = 255;else if (t < 0) t = 0;*dest++ = t;
 213                                         t = *bl++ >> 7;if (t > 255) t = 255;else if (t < 0) t = 0;*dest++ = t;
 214                                 }
 215                         }
 216                 }
 217         }
 218 }
 219
 220 byte templight[32*32*4];
 221
 222 void R_UpdateLightmap(msurface_t *s, int lnum)
 223 {
 224         int smax, tmax;
 225         // upload the new lightmap texture fragment
 226         glBindTexture(GL_TEXTURE_2D, lightmap_textures + lnum);
 227         if (nosubimage || nosubimagefragments)
 228         {
 229                 if (lightmapupdate[lnum][0] > s->light_t)
 230                         lightmapupdate[lnum][0] = s->light_t;
 231                 if (lightmapupdate[lnum][1] < (s->light_t + ((s->extents[1]>>4)+1)))
 232                         lightmapupdate[lnum][1] = (s->light_t + ((s->extents[1]>>4)+1));
 233                 if (lightmaprgba)
 234                         R_BuildLightMap (s, lightmaps[s->lightmaptexturenum] + (s->light_t * BLOCK_WIDTH + s->light_s) * 4, BLOCK_WIDTH * 4);
 235                 else
 236                         R_BuildLightMap (s, lightmaps[s->lightmaptexturenum] + (s->light_t * BLOCK_WIDTH + s->light_s) * 3, BLOCK_WIDTH * 3);
 237         }
 238         else
 239         {
 240                 smax = ((s->extents[0]>>4)+lightmapalign) & lightmapalignmask;
 241                 tmax = (s->extents[1]>>4)+1;
 242                 if (lightmaprgba)
 243                 {
 244                         R_BuildLightMap (s, templight, smax * 4);
 245                         glTexSubImage2D(GL_TEXTURE_2D, 0, s->light_s, s->light_t, smax, tmax, GL_RGBA, GL_UNSIGNED_BYTE, templight);
 246                 }
 247                 else
 248                 {
 249                         R_BuildLightMap (s, templight, smax * 3);
 250                         glTexSubImage2D(GL_TEXTURE_2D, 0, s->light_s, s->light_t, smax, tmax, GL_RGB , GL_UNSIGNED_BYTE, templight);
 251                 }
 252         }
 253 }
 254
 255
 256 /*
 257 ===============
 258 R_TextureAnimation
 259
 260 Returns the proper texture for a given time and base texture
 261 ===============
 262 */
 263 texture_t *R_TextureAnimation (texture_t *base)
 264 {
 265         texture_t *original;
 266         int             relative;
 267         int             count;
 268
 269         if (currententity->frame)
 270         {
 271                 if (base->alternate_anims)
 272                         base = base->alternate_anims;
 273         }
 274
 275         if (!base->anim_total)
 276                 return base;
 277
 278         original = base;
 279
 280         relative = (int)(cl.time*10) % base->anim_total;
 281
 282         count = 0;
 283         while (base->anim_min > relative || base->anim_max <= relative)
 284         {
 285                 base = base->anim_next;
 286                 if (!base)
 287                 {
 288                         Con_Printf("R_TextureAnimation: broken cycle");
 289                         return original;
 290                 }
 291                 if (++count > 100)
 292                 {
 293                         Con_Printf("R_TextureAnimation: infinite cycle");
 294                         return original;
 295                 }
 296         }
 297
 298         return base;
 299 }
 300
 301
 302 /*
 303 =============================================================
 304
 305         BRUSH MODELS
 306
 307 =============================================================
 308 */
 309
 310
 311 extern  int             solidskytexture;
 312 extern  int             alphaskytexture;
 313 extern  float   speedscale;             // for top sky and bottom sky
 314
 315 extern char skyname[];
 316
 317 void R_DynamicLightPoint(vec3_t color, vec3_t org, int *dlightbits);
 318 float   turbsin[256] =
 319 {
 320         #include "gl_warp_sin.h"
 321 };
 322 #define TURBSCALE (256.0 / (2 * M_PI))
 323
 324
 325 void UploadLightmaps()
 326 {
 327         int i;
 328         if (nosubimage || nosubimagefragments)
 329         {
 330                 for (i = 0;i < MAX_LIGHTMAPS;i++)
 331                 {
 332                         if (lightmapupdate[i][0] < lightmapupdate[i][1])
 333                         {
 334                                 glBindTexture(GL_TEXTURE_2D, lightmap_textures + i);
 335                                 if (nosubimage)
 336                                 {
 337                                         if (lightmaprgba)
 338                                                 glTexImage2D(GL_TEXTURE_2D, 0, 3, BLOCK_WIDTH, BLOCK_HEIGHT, 0, GL_RGBA, GL_UNSIGNED_BYTE, lightmaps[i]);
 339                                         else
 340                                                 glTexImage2D(GL_TEXTURE_2D, 0, 3, BLOCK_WIDTH, BLOCK_HEIGHT, 0, GL_RGB, GL_UNSIGNED_BYTE, lightmaps[i]);
 341                                 }
 342                                 else
 343                                 {
 344                                         if (lightmaprgba)
 345                                                 glTexSubImage2D(GL_TEXTURE_2D, 0, 0, lightmapupdate[i][0], BLOCK_WIDTH, lightmapupdate[i][1] - lightmapupdate[i][0], GL_RGBA, GL_UNSIGNED_BYTE, lightmaps[i] + (BLOCK_WIDTH * 4 * lightmapupdate[i][0]));
 346                                         else
 347                                                 glTexSubImage2D(GL_TEXTURE_2D, 0, 0, lightmapupdate[i][0], BLOCK_WIDTH, lightmapupdate[i][1] - lightmapupdate[i][0], GL_RGB, GL_UNSIGNED_BYTE, lightmaps[i] + (BLOCK_WIDTH * 3 * lightmapupdate[i][0]));
 348                                 }
 349                         }
 350                         lightmapupdate[i][0] = BLOCK_HEIGHT;
 351                         lightmapupdate[i][1] = 0;
 352                 }
 353         }
 354 }
 355
 356 float   wvert[1024*6]; // used by the following functions
 357
 358 void RSurf_DrawSky(msurface_t *s, int transform)
 359 {
 360         glpoly_t *p;
 361         int i;
 362         float *v;
 363         for (p=s->polys ; p ; p=p->next)
 364         {
 365                 if (currentskypoly < MAX_SKYPOLYS && currentskyvert + p->numverts <= MAX_SKYVERTS)
 366                 {
 367                         skypoly[currentskypoly].firstvert = currentskyvert;
 368                         skypoly[currentskypoly++].verts = p->numverts;
 369                         if (transform)
 370                         {
 371                                 for (i = 0,v = p->verts[0];i < p->numverts;i++, v += VERTEXSIZE)
 372                                 {
 373                                         softwaretransform(v, skyvert[currentskyvert].v);
 374                                         currentskyvert++;
 375                                 }
 376                         }
 377                         else
 378                         {
 379                                 for (i = 0,v = p->verts[0];i < p->numverts;i++, v += VERTEXSIZE)
 380                                 {
 381                                         skyvert[currentskyvert].v[0] = v[0];
 382                                         skyvert[currentskyvert].v[1] = v[1];
 383                                         skyvert[currentskyvert++].v[2] = v[2];
 384                                 }
 385                         }
 386                 }
 387         }
 388 }
 389
 390 int RSurf_Light(int *dlightbits, glpoly_t *polys)
 391 {
 392         float           cr, cg, cb, radius, radius2, f, *v, *wv;
 393         int                     i, a, b, lit = false;
 394         unsigned int c, d;
 395         dlight_t        *light;
 396         vec_t           *lightorigin;
 397         glpoly_t        *p;
 398         for (a = 0;a < 8;a++)
 399         {
 400                 if ((c = dlightbits[a]))
 401                 {
 402                         for (b = 0, d = 1;c;b++, d <<= 1)
 403                         {
 404                                 if (c & d)
 405                                 {
 406                                         c -= d;
 407                                         light = &cl_dlights[a * 32 + b];
 408                                         lightorigin = light->origin;
 409                                         cr = light->color[0];
 410                                         cg = light->color[1];
 411                                         cb = light->color[2];
 412                                         radius = light->radius*light->radius*LIGHTSCALE;
 413                                         radius2 = radius * (256.0f / LIGHTSCALE);
 414                                         wv = wvert;
 415                                         for (p = polys;p;p = p->next)
 416                                         {
 417                                                 for (i = 0, v = p->verts[0];i < p->numverts;i++, v += VERTEXSIZE)
 418                                                 {
 419                                                         f = VectorDistance2(wv, lightorigin);
 420                                                         if (f < radius)
 421                                                         {
 422                                                                 f = radius2 / (f + LIGHTOFFSET);
 423                                                                 wv[3] += cr * f;
 424                                                                 wv[4] += cg * f;
 425                                                                 wv[5] += cb * f;
 426                                                                 lit = true;
 427                                                         }
 428                                                         wv += 6;
 429                                                 }
 430                                         }
 431                                 }
 432                         }
 433                 }
 434         }
 435         return lit;
 436 }
 437
 438 void RSurf_DrawWater(msurface_t *s, texture_t *t, int transform, int alpha)
 439 {
 440         int             i;
 441         float   os = turbsin[(int)(realtime * TURBSCALE) & 255], ot = turbsin[(int)(realtime * TURBSCALE + 96.0) & 255];
 442         glpoly_t *p;
 443         float   *wv, *v;
 444         wv = wvert;
 445         for (p = s->polys;p;p = p->next)
 446         {
 447                 for (i = 0, v = p->verts[0];i < p->numverts;i++, v += VERTEXSIZE)
 448                 {
 449                         if (transform)
 450                                 softwaretransform(v, wv);
 451                         else
 452                                 VectorCopy(v, wv);
 453                         if (r_waterripple.value)
 454                                 wv[2] += r_waterripple.value * turbsin[(int)((wv[0]*(1.0f/32.0f)+realtime) * TURBSCALE) & 255] * turbsin[(int)((wv[1]*(1.0f/32.0f)+realtime) * TURBSCALE) & 255] * (1.0f / 64.0f);
 455                         wv[3] = wv[4] = wv[5] = 128.0f;
 456                         wv += 6;
 457                 }
 458         }
 459         if (s->dlightframe == r_dlightframecount && r_dynamic.value)
 460                 RSurf_Light(s->dlightbits, s->polys);
 461         wv = wvert;
 462         // FIXME: make fog texture if water texture is transparent?
 463         for (p=s->polys ; p ; p=p->next)
 464         {
 465                 transpolybegin(t->gl_texturenum, t->gl_glowtexturenum, 0, TPOLYTYPE_ALPHA);
 466                 for (i = 0,v = p->verts[0];i < p->numverts;i++, v += VERTEXSIZE, wv += 6)
 467                         transpolyvert(wv[0], wv[1], wv[2], (v[3] + os) * (1.0f/64.0f), (v[4] + ot) * (1.0f/64.0f), wv[3], wv[4], wv[5], alpha);
 468                 transpolyend();
 469         }
 470 }
 471
 472 void RSurf_CheckLightmap(msurface_t *s)
 473 {
 474         if (r_dynamic.value)
 475         {
 476                 if (r_ambient.value != s->cached_ambient || lighthalf != s->cached_lighthalf
 477                 || (s->styles[0] != 255 && d_lightstylevalue[s->styles[0]] != s->cached_light[0])
 478                 || (s->styles[1] != 255 && d_lightstylevalue[s->styles[1]] != s->cached_light[1])
 479                 || (s->styles[2] != 255 && d_lightstylevalue[s->styles[2]] != s->cached_light[2])
 480                 || (s->styles[3] != 255 && d_lightstylevalue[s->styles[3]] != s->cached_light[3]))
 481                         R_UpdateLightmap(s, s->lightmaptexturenum);
 482         }
 483 }
 484
 485 void RSurf_Transform(glpoly_t *p, int transform)
 486 {
 487         int             i;
 488         float   *v, *wv = wvert;
 489         for (;p;p = p->next)
 490         {
 491                 for (i = 0, v = p->verts[0];i < p->numverts;i++, v += VERTEXSIZE)
 492                 {
 493                         if (transform)
 494                                 softwaretransform(v, wv);
 495                         else
 496                                 VectorCopy(v, wv);
 497                         wv[3] = wv[4] = wv[5] = 0.0f;
 498                         wv += 6;
 499                 }
 500         }
 501 }
 502
 503 void RSurf_EmitWallpolys(int lightmap, glpoly_t *p, texture_t *t, int lit)
 504 {
 505         int             i;
 506         float   *v, *wv = wvert;
 507         wallpoly_t *wp = &wallpoly[currentwallpoly];
 508         wallvert_t *out = &wallvert[currentwallvert];
 509         for (;p;p = p->next)
 510         {
 511                 if (currentwallpoly >= MAX_WALLPOLYS)
 512                         break;
 513                 if (currentwallvert+p->numverts > MAX_WALLVERTS)
 514                         break;
 515                 v = p->verts[0];
 516                 wp->texnum = (unsigned short) t->gl_texturenum;
 517                 wp->lighttexnum = (unsigned short) lightmap;
 518                 wp->glowtexnum = (unsigned short) t->gl_glowtexturenum;
 519                 wp->firstvert = currentwallvert;
 520                 wp->numverts = p->numverts;
 521                 wp->lit = lit;
 522                 wp++;
 523                 currentwallpoly++;
 524                 currentwallvert += p->numverts;
 525                 for (i = 0;i < p->numverts;i++, v += VERTEXSIZE, wv += 6, out++)
 526                 {
 527                         if (lit)
 528                         {
 529                                 if (lighthalf)
 530                                 {
 531                                         out->r = (byte) (bound(0, (int) wv[3] >> 1, 255));
 532                                         out->g = (byte) (bound(0, (int) wv[4] >> 1, 255));
 533                                         out->b = (byte) (bound(0, (int) wv[5] >> 1, 255));
 534                                         out->a = 255;
 535                                 }
 536                                 else
 537                                 {
 538                                         out->r = (byte) (bound(0, (int) wv[3], 255));
 539                                         out->g = (byte) (bound(0, (int) wv[4], 255));
 540                                         out->b = (byte) (bound(0, (int) wv[5], 255));
 541                                         out->a = 255;
 542                                 }
 543                         }
 544                         out->vert[0] = wv[0];
 545                         out->vert[1] = wv[1];
 546                         out->vert[2] = wv[2];
 547                         out->s = v[3];
 548                         out->t = v[4];
 549                         out->u = v[5];
 550                         out->v = v[6];
 551                 }
 552         }
 553 }
 554
 555 void RSurf_DrawWall(msurface_t *s, texture_t *t, int transform)
 556 {
 557         int                     lit = false;
 558         // check for lightmap modification
 559         RSurf_CheckLightmap(s);
 560         RSurf_Transform(s->polys, transform);
 561         if (s->dlightframe == r_dlightframecount && r_dynamic.value)
 562                 lit = RSurf_Light(s->dlightbits, s->polys);
 563         RSurf_EmitWallpolys(lightmap_textures + s->lightmaptexturenum, s->polys, t, lit);
 564 }
 565
 566 // LordHavoc: transparent brush models
 567 extern int r_dlightframecount;
 568 extern float modelalpha;
 569
 570 void RSurf_EmitWallVertex(glpoly_t *p, texture_t *t, int modulate, int alpha)
 571 {
 572         int i;
 573         float *v, *wv = wvert;
 574         if (modulate)
 575         {
 576                 for (;p;p = p->next)
 577                 {
 578                         v = p->verts[0];
 579                         transpolybegin(t->gl_texturenum, t->gl_glowtexturenum, 0, currententity->effects & EF_ADDITIVE ? TPOLYTYPE_ADD : TPOLYTYPE_ALPHA);
 580                         for (i = 0,v = p->verts[0];i < p->numverts;i++, v += VERTEXSIZE, wv += 6)
 581                                 transpolyvert(wv[0], wv[1], wv[2], v[3], v[4], wv[3] * currententity->colormod[0], wv[4] * currententity->colormod[1], wv[5] * currententity->colormod[2], alpha);
 582                         transpolyend();
 583                 }
 584         }
 585         else
 586         {
 587                 for (;p;p = p->next)
 588                 {
 589                         v = p->verts[0];
 590                         transpolybegin(t->gl_texturenum, t->gl_glowtexturenum, 0, currententity->effects & EF_ADDITIVE ? TPOLYTYPE_ADD : TPOLYTYPE_ALPHA);
 591                         for (i = 0,v = p->verts[0];i < p->numverts;i++, v += VERTEXSIZE, wv += 6)
 592                                 transpolyvert(wv[0], wv[1], wv[2], v[3], v[4], wv[3], wv[4], wv[5], alpha);
 593                         transpolyend();
 594                 }
 595         }
 596 }
 597
 598 void RSurf_WallVertexTransform(msurface_t *s, texture_t *t, int transform)
 599 {
 600         int                     i;
 601         glpoly_t        *p;
 602         float           *wv, *v;
 603         int                     size3;
 604         float           scale;
 605         byte            *lm;
 606         size3 = ((s->extents[0]>>4)+1)*((s->extents[1]>>4)+1)*3; // *3 for colored lighting
 607         wv = wvert;
 608         for (p = s->polys;p;p = p->next)
 609         {
 610                 for (i = 0, v = p->verts[0];i < p->numverts;i++, v += VERTEXSIZE)
 611                 {
 612                         if (transform)
 613                                 softwaretransform(v, wv);
 614                         else
 615                                 VectorCopy(v, wv);
 616                         wv[3] = wv[4] = wv[5] = r_ambient.value * 2.0f;
 617                         if (s->styles[0] != 255)
 618                         {
 619                                 lm = (byte *)((long) s->samples + (int) v[7]);
 620                                 scale = d_lightstylevalue[s->styles[0]] * (1.0f / 128.0f);wv[3] += lm[size3*0+0] * scale;wv[4] += lm[size3*0+1] * scale;wv[5] += lm[size3*0+2] * scale;
 621                                 if (s->styles[1] != 255)
 622                                 {
 623                                         scale = d_lightstylevalue[s->styles[1]] * (1.0f / 128.0f);wv[3] += lm[size3*1+0] * scale;wv[4] += lm[size3*1+1] * scale;wv[5] += lm[size3*1+2] * scale;
 624                                         if (s->styles[2] != 255)
 625                                         {
 626                                                 scale = d_lightstylevalue[s->styles[2]] * (1.0f / 128.0f);wv[3] += lm[size3*2+0] * scale;wv[4] += lm[size3*2+1] * scale;wv[5] += lm[size3*2+2] * scale;
 627                                                 if (s->styles[3] != 255)
 628                                                 {
 629                                                         scale = d_lightstylevalue[s->styles[3]] * (1.0f / 128.0f);wv[3] += lm[size3*3+0] * scale;wv[4] += lm[size3*3+1] * scale;wv[5] += lm[size3*3+2] * scale;
 630                                                 }
 631                                         }
 632                                 }
 633                         }
 634                         wv += 6;
 635                 }
 636         }
 637 }
 638
 639 void RSurf_DrawWallVertex(msurface_t *s, texture_t *t, int transform, int isbmodel)
 640 {
 641         RSurf_WallVertexTransform(s, t, transform);
 642         if (s->dlightframe == r_dlightframecount && r_dynamic.value)
 643                 RSurf_Light(s->dlightbits, s->polys);
 644         RSurf_EmitWallVertex(s->polys, t, isbmodel && (currententity->colormod[0] != 1 || currententity->colormod[1] != 1 || currententity->colormod[2] != 1), (int) (modelalpha * 255.0f));
 645 }
 646
 647 /*
 648 ================
 649 DrawTextureChains
 650 ================
 651 */
 652 extern qboolean hlbsp;
 653 extern char skyname[];
 654 void R_DrawSurf(msurface_t *s, int isbmodel, int vertexlit)
 655 {
 656         texture_t *t;
 657         if (s->flags & SURF_DRAWSKY)
 658         {
 659                 skyisvisible = true;
 660                 if (!hlbsp) // LordHavoc: HalfLife maps have freaky skypolys...
 661                         RSurf_DrawSky(s, false);
 662                 return;
 663         }
 664         t = R_TextureAnimation (s->texinfo->texture);
 665         if (s->flags & SURF_DRAWTURB)
 666         {
 667                 RSurf_DrawWater(s, t, false, s->flags & SURF_DRAWNOALPHA ? 255 : r_wateralpha.value*255.0f);
 668                 return;
 669         }
 670         if (vertexlit)
 671                 RSurf_DrawWallVertex(s, t, false, false);
 672         else
 673                 RSurf_DrawWall(s, t, false);
 674 }
 675
 676 void DrawTextureChains (void)
 677 {
 678         int                     n;
 679         msurface_t      *s;
 680         texture_t       *t;
 681
 682         for (n = 0;n < cl.worldmodel->numtextures;n++)
 683         {
 684                 if (!cl.worldmodel->textures[n] || !(s = cl.worldmodel->textures[n]->texturechain))
 685                         continue;
 686                 cl.worldmodel->textures[n]->texturechain = NULL;
 687 //              for (;s;s = s->texturechain)
 688 //                      R_DrawSurf(s, false, gl_vertex.value);
 689                 // LordHavoc: decide the render type only once, because the surface properties were determined by texture anyway
 690                 // sky
 691                 if (s->flags & SURF_DRAWSKY)
 692                 {
 693                         skyisvisible = true;
 694                         if (!hlbsp) // LordHavoc: HalfLife maps have freaky skypolys...
 695                                 for (;s;s = s->texturechain)
 696                                         RSurf_DrawSky(s, false);
 697                         continue;
 698                 }
 699                 t = R_TextureAnimation (cl.worldmodel->textures[n]);
 700                 // subdivided water surface warp
 701                 if (s->flags & SURF_DRAWTURB)
 702                 {
 703                         int alpha = s->flags & SURF_DRAWNOALPHA ? 255 : r_wateralpha.value*255.0f;
 704                         for (;s;s = s->texturechain)
 705                                 RSurf_DrawWater(s, t, false, alpha);
 706                         continue;
 707                 }
 708                 if (gl_vertex.value)
 709                         for (;s;s = s->texturechain)
 710                                 RSurf_DrawWallVertex(s, t, false, false);
 711                 else
 712                         for (;s;s = s->texturechain)
 713                                 RSurf_DrawWall(s, t, false);
 714         }
 715 }
 716
 717 void R_NoVisMarkLights (vec3_t lightorigin, dlight_t *light, int bit, int bitindex, model_t *model);
 718
 719 /*
 720 =================
 721 R_DrawBrushModel
 722 =================
 723 */
 724 void R_DrawBrushModel (entity_t *e)
 725 {
 726         int                     i;
 727         vec3_t          mins, maxs;
 728         msurface_t      *s;
 729         model_t         *clmodel;
 730         int     rotated, vertexlit = false;
 731         texture_t       *t;
 732         vec3_t          org;
 733
 734         currententity = e;
 735
 736         clmodel = e->model;
 737
 738         if (e->angles[0] || e->angles[1] || e->angles[2])
 739         {
 740                 rotated = true;
 741                 for (i=0 ; i<3 ; i++)
 742                 {
 743                         mins[i] = e->origin[i] - clmodel->radius;
 744                         maxs[i] = e->origin[i] + clmodel->radius;
 745                 }
 746         }
 747         else
 748         {
 749                 rotated = false;
 750                 VectorAdd (e->origin, clmodel->mins, mins);
 751                 VectorAdd (e->origin, clmodel->maxs, maxs);
 752         }
 753
 754         if (R_CullBox (mins, maxs))
 755                 return;
 756
 757         VectorSubtract (r_refdef.vieworg, e->origin, modelorg);
 758         if (rotated)
 759         {
 760                 vec3_t  temp;
 761                 vec3_t  forward, right, up;
 762
 763                 VectorCopy (modelorg, temp);
 764                 AngleVectors (e->angles, forward, right, up);
 765                 modelorg[0] = DotProduct (temp, forward);
 766                 modelorg[1] = -DotProduct (temp, right);
 767                 modelorg[2] = DotProduct (temp, up);
 768         }
 769
 770         s = &clmodel->surfaces[clmodel->firstmodelsurface];
 771
 772 // calculate dynamic lighting for bmodel if it's not an
 773 // instanced model
 774         for (i = 0;i < MAX_DLIGHTS;i++)
 775         {
 776                 if ((cl_dlights[i].die < cl.time) || (!cl_dlights[i].radius))
 777                         continue;
 778
 779                 VectorSubtract(cl_dlights[i].origin, currententity->origin, org);
 780                 R_NoVisMarkLights (org, &cl_dlights[i], 1<<(i&31), i >> 5, clmodel);
 781         }
 782         vertexlit = modelalpha != 1 || clmodel->firstmodelsurface == 0 || (currententity->effects & EF_FULLBRIGHT) || currententity->colormod[0] != 1 || currententity->colormod[2] != 1 || currententity->colormod[2] != 1;
 783
 784 e->angles[0] = -e->angles[0];   // stupid quake bug
 785         softwaretransformforentity (e);
 786 e->angles[0] = -e->angles[0];   // stupid quake bug
 787
 788         // draw texture
 789         for (i = 0;i < clmodel->nummodelsurfaces;i++, s++)
 790         {
 791                 if (((s->flags & SURF_PLANEBACK) == 0) == (PlaneDiff(modelorg, s->plane) >= 0))
 792                 {
 793 //                      R_DrawSurf(s, true, vertexlit || s->texinfo->texture->transparent);
 794                         if (s->flags & SURF_DRAWSKY)
 795                         {
 796                                 RSurf_DrawSky(s, true);
 797                                 continue;
 798                         }
 799                         t = R_TextureAnimation (s->texinfo->texture);
 800                         if (s->flags & SURF_DRAWTURB)
 801                         {
 802                                 RSurf_DrawWater(s, t, true, s->flags & SURF_DRAWNOALPHA ? 255 : r_wateralpha.value*255.0f);
 803                                 continue;
 804                         }
 805                         if (vertexlit || s->texinfo->texture->transparent)
 806                                 RSurf_DrawWallVertex(s, t, true, true);
 807                         else
 808                                 RSurf_DrawWall(s, t, true);
 809                 }
 810         }
 811         UploadLightmaps();
 812 }
 813
 814 /*
 815 =============================================================
 816
 817         WORLD MODEL
 818
 819 =============================================================
 820 */
 821
 822 void R_StoreEfrags (efrag_t **ppefrag);
 823
 824 struct nodestack_s
 825 {
 826         int side;
 827         mnode_t *node;
 828 } nodestack[8192];
 829
 830 /*
 831 ================
 832 R_WorldNode
 833 ================
 834 */
 835 void R_WorldNode ()
 836 {
 837         int side, texsort, vertex;
 838         struct nodestack_s *nstack;
 839         mnode_t *node;
 840         mleaf_t *pleaf;
 841         msurface_t *surf, *endsurf, **mark, **endmark;
 842         nstack = nodestack;
 843         texsort = gl_texsort.value;
 844         vertex = gl_vertex.value;
 845
 846         if (!(node = cl.worldmodel->nodes))
 847                 return;
 848
 849         while(1)
 850         {
 851         // if a leaf node, draw stuff
 852                 if (node->contents < 0)
 853                 {
 854                         if (node->contents != CONTENTS_SOLID)
 855                         {
 856                                 pleaf = (mleaf_t *)node;
 857
 858                                 c_leafs++;
 859                                 if (pleaf->nummarksurfaces)
 860                                 {
 861                                         mark = pleaf->firstmarksurface;
 862                                         endmark = mark + pleaf->nummarksurfaces;
 863                                         do
 864                                         {
 865                                                 (*mark)->visframe = r_framecount;
 866                                                 mark++;
 867                                         }
 868                                         while (mark < endmark);
 869                                 }
 870
 871                                 // deal with model fragments in this leaf
 872                                 if (pleaf->efrags)
 873                                         R_StoreEfrags (&pleaf->efrags);
 874                         }
 875
 876                         if (nstack <= nodestack)
 877                                 break;
 878                         nstack--;
 879                         node = nstack->node;
 880                         side = nstack->side;
 881                         goto loc0;
 882                 }
 883
 884                 c_nodes++;
 885
 886                 // node is just a decision point, so go down the apropriate sides
 887
 888                 // find which side of the node we are on
 889                 side = PlaneDist(modelorg, node->plane) < node->plane->dist;
 890
 891                 // recurse down the children, front side first
 892                 if (node->children[side]->visframe == r_visframecount && R_NotCulledBox(node->children[side]->minmaxs, node->children[side]->minmaxs+3))
 893                 {
 894                         nstack->node = node;
 895                         nstack->side = !side; // go down back side when we come back up
 896                         nstack++;
 897                         node = node->children[side];
 898                         continue;
 899                 }
 900                 side = !side;
 901 loc0:
 902
 903         // draw stuff
 904                 if (node->numsurfaces)
 905                 {
 906                         surf = cl.worldmodel->surfaces + node->firstsurface;
 907                         endsurf = surf + node->numsurfaces;
 908
 909                         if (texsort)
 910                         {
 911                                 if (side)
 912                                 {
 913                                         do
 914                                         {
 915                                                 if (surf->visframe == r_framecount && !(surf->flags & SURF_PLANEBACK))
 916                                                 {
 917                                                         surf->texturechain = surf->texinfo->texture->texturechain;
 918                                                         surf->texinfo->texture->texturechain = surf;
 919                                                 }
 920                                                 surf++;
 921                                         }
 922                                         while (surf < endsurf);
 923                                 }
 924                                 else
 925                                 {
 926                                         do
 927                                         {
 928                                                 if (surf->visframe == r_framecount && (surf->flags & SURF_PLANEBACK))
 929                                                 {
 930                                                         surf->texturechain = surf->texinfo->texture->texturechain;
 931                                                         surf->texinfo->texture->texturechain = surf;
 932                                                 }
 933                                                 surf++;
 934                                         }
 935                                         while (surf < endsurf);
 936                                 }
 937                         }
 938                         else
 939                         {
 940                                 if (side)
 941                                 {
 942                                         do
 943                                         {
 944                                                 if (surf->visframe == r_framecount && !(surf->flags & SURF_PLANEBACK))
 945                                                         R_DrawSurf(surf, false, vertex);
 946                                                 surf++;
 947                                         }
 948                                         while (surf < endsurf);
 949                                 }
 950                                 else
 951                                 {
 952                                         do
 953                                         {
 954                                                 if (surf->visframe == r_framecount && (surf->flags & SURF_PLANEBACK))
 955                                                         R_DrawSurf(surf, false, vertex);
 956                                                 surf++;
 957                                         }
 958                                         while (surf < endsurf);
 959                                 }
 960                         }
 961                 }
 962
 963         // recurse down the back side
 964                 if (node->children[side]->visframe == r_visframecount && R_NotCulledBox(node->children[side]->minmaxs, node->children[side]->minmaxs+3))
 965                 {
 966                         node = node->children[side];
 967                         continue;
 968                 }
 969
 970                 if (nstack <= nodestack)
 971                         break;
 972                 nstack--;
 973                 node = nstack->node;
 974                 side = nstack->side;
 975                 goto loc0;
 976         }
 977 }
 978
 979
 980 /*
 981 =============
 982 R_DrawWorld
 983 =============
 984 */
 985 void R_DrawWorld (void)
 986 {
 987         entity_t        ent;
 988
 989         memset (&ent, 0, sizeof(ent));
 990         ent.model = cl.worldmodel;
 991         ent.colormod[0] = ent.colormod[1] = ent.colormod[2] = 1;
 992         modelalpha = ent.alpha = 1;
 993         ent.scale = 1;
 994
 995         VectorCopy (r_refdef.vieworg, modelorg);
 996
 997         currententity = &ent;
 998
 999         softwaretransformidentity(); // LordHavoc: clear transform
1000
1001         if (cl.worldmodel)
1002                 R_WorldNode ();
1003
1004         glClear (GL_DEPTH_BUFFER_BIT);
1005
1006         R_PushDlights (); // now mark the lit surfaces
1007
1008         DrawTextureChains ();
1009
1010         glTexEnvf(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE);
1011         glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
1012 }
1013
1014
1015 /*
1016 ===============
1017 R_MarkLeaves
1018 ===============
1019 */
1020 void R_MarkLeaves (void)
1021 {
1022         byte    *vis;
1023         mnode_t *node;
1024         int             i;
1025
1026         if (r_oldviewleaf == r_viewleaf && !r_novis.value)
1027                 return;
1028
1029         r_visframecount++;
1030         r_oldviewleaf = r_viewleaf;
1031
1032         if (r_novis.value)
1033         {
1034                 for (i=0 ; i<cl.worldmodel->numleafs ; i++)
1035                 {
1036                         node = (mnode_t *)&cl.worldmodel->leafs[i+1];
1037                         do
1038                         {
1039                                 if (node->visframe == r_visframecount)
1040                                         break;
1041                                 node->visframe = r_visframecount;
1042                                 node = node->parent;
1043                         } while (node);
1044                 }
1045         }
1046         else
1047         {
1048                 vis = Mod_LeafPVS (r_viewleaf, cl.worldmodel);
1049
1050                 for (i=0 ; i<cl.worldmodel->numleafs ; i++)
1051                 {
1052                         if (vis[i>>3] & (1<<(i&7)))
1053                         {
1054                                 node = (mnode_t *)&cl.worldmodel->leafs[i+1];
1055                                 do
1056                                 {
1057                                         if (node->visframe == r_visframecount)
1058                                                 break;
1059                                         node->visframe = r_visframecount;
1060                                         node = node->parent;
1061                                 } while (node);
1062                         }
1063                 }
1064         }
1065 }
1066
1067
1068
1069 /*
1070 =============================================================================
1071
1072   LIGHTMAP ALLOCATION
1073
1074 =============================================================================
1075 */
1076
1077 // returns a texture number and the position inside it
1078 int AllocBlock (int w, int h, short *x, short *y)
1079 {
1080         int             i, j;
1081         int             best, best2;
1082         int             texnum;
1083
1084         for (texnum=0 ; texnum<MAX_LIGHTMAPS ; texnum++)
1085         {
1086                 best = BLOCK_HEIGHT;
1087
1088                 for (i=0 ; i<BLOCK_WIDTH-w ; i+=lightmapalign) // LordHavoc: NVIDIA has broken subimage, so align the lightmaps
1089                 {
1090                         best2 = 0;
1091
1092                         for (j=0 ; j<w ; j++)
1093                         {
1094                                 if (allocated[texnum][i+j] >= best)
1095                                         break;
1096                                 if (allocated[texnum][i+j] > best2)
1097                                         best2 = allocated[texnum][i+j];
1098                         }
1099                         if (j == w)
1100                         {       // this is a valid spot
1101                                 *x = i;
1102                                 *y = best = best2;
1103                         }
1104                 }
1105
1106                 if (best + h > BLOCK_HEIGHT)
1107                         continue;
1108
1109                 if (nosubimagefragments || nosubimage)
1110                 {
1111                         if (!lightmaps[texnum])
1112                                 lightmaps[texnum] = calloc(BLOCK_WIDTH*BLOCK_HEIGHT*4, 1);
1113                 }
1114                 // LordHavoc: clear texture to blank image, fragments are uploaded using subimage
1115                 else if (!allocated[texnum][0])
1116                 {
1117                         byte blank[BLOCK_WIDTH*BLOCK_HEIGHT*3];
1118                         memset(blank, 0, sizeof(blank));
1119                         glBindTexture(GL_TEXTURE_2D, lightmap_textures + texnum);
1120                         glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
1121                         glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
1122                         if (lightmaprgba)
1123                                 glTexImage2D (GL_TEXTURE_2D, 0, 3, BLOCK_WIDTH, BLOCK_HEIGHT, 0, GL_RGBA, GL_UNSIGNED_BYTE, blank);
1124                         else
1125                                 glTexImage2D (GL_TEXTURE_2D, 0, 3, BLOCK_WIDTH, BLOCK_HEIGHT, 0, GL_RGB, GL_UNSIGNED_BYTE, blank);
1126                 }
1127
1128                 for (i=0 ; i<w ; i++)
1129                         allocated[texnum][*x + i] = best + h;
1130
1131                 return texnum;
1132         }
1133
1134         Sys_Error ("AllocBlock: full");
1135         return 0;
1136 }
1137
1138
1139 mvertex_t       *r_pcurrentvertbase;
1140 model_t         *currentmodel;
1141
1142 int     nColinElim;
1143
1144 /*
1145 ================
1146 BuildSurfaceDisplayList
1147 ================
1148 */
1149 void BuildSurfaceDisplayList (msurface_t *fa)
1150 {
1151         int                     i, j, lindex, lnumverts;
1152         medge_t         *pedges, *r_pedge;
1153         int                     vertpage;
1154         float           *vec;
1155         float           s, t;
1156         glpoly_t        *poly;
1157
1158 // reconstruct the polygon
1159         pedges = currentmodel->edges;
1160         lnumverts = fa->numedges;
1161         vertpage = 0;
1162
1163         //
1164         // draw texture
1165         //
1166         poly = Hunk_Alloc (sizeof(glpoly_t) + (lnumverts-4) * VERTEXSIZE*sizeof(float));
1167         poly->next = fa->polys;
1168         poly->flags = fa->flags;
1169         fa->polys = poly;
1170         poly->numverts = lnumverts;
1171
1172         for (i=0 ; i<lnumverts ; i++)
1173         {
1174                 lindex = currentmodel->surfedges[fa->firstedge + i];
1175
1176                 if (lindex > 0)
1177                 {
1178                         r_pedge = &pedges[lindex];
1179                         vec = r_pcurrentvertbase[r_pedge->v[0]].position;
1180                 }
1181                 else
1182                 {
1183                         r_pedge = &pedges[-lindex];
1184                         vec = r_pcurrentvertbase[r_pedge->v[1]].position;
1185                 }
1186                 s = DotProduct (vec, fa->texinfo->vecs[0]) + fa->texinfo->vecs[0][3];
1187                 t = DotProduct (vec, fa->texinfo->vecs[1]) + fa->texinfo->vecs[1][3];
1188
1189                 VectorCopy (vec, poly->verts[i]);
1190                 poly->verts[i][3] = s / fa->texinfo->texture->width;
1191                 poly->verts[i][4] = t / fa->texinfo->texture->height;
1192
1193                 //
1194                 // lightmap texture coordinates
1195                 //
1196                 s -= fa->texturemins[0];
1197                 t -= fa->texturemins[1];
1198                 s += 8;
1199                 t += 8;
1200                 // LordHavoc: calc lightmap data offset
1201                 j = (bound(0l, (int)t>>4, fa->extents[1]>>4) * ((fa->extents[0]>>4)+1) + bound(0l, (int)s>>4, fa->extents[0]>>4)) * 3;
1202                 poly->verts[i][7] = j;
1203                 s += fa->light_s*16;
1204                 s /= BLOCK_WIDTH*16; //fa->texinfo->texture->width;
1205
1206                 t += fa->light_t*16;
1207                 t /= BLOCK_HEIGHT*16; //fa->texinfo->texture->height;
1208
1209                 poly->verts[i][5] = s;
1210                 poly->verts[i][6] = t;
1211         }
1212
1213         //
1214         // remove co-linear points - Ed
1215         //
1216         /*
1217         if (!gl_keeptjunctions.value)
1218         {
1219                 for (i = 0 ; i < lnumverts ; ++i)
1220                 {
1221                         vec3_t v1, v2;
1222                         float *prev, *this, *next;
1223
1224                         prev = poly->verts[(i + lnumverts - 1) % lnumverts];
1225                         this = poly->verts[i];
1226                         next = poly->verts[(i + 1) % lnumverts];
1227
1228                         VectorSubtract( this, prev, v1 );
1229                         VectorNormalize( v1 );
1230                         VectorSubtract( next, prev, v2 );
1231                         VectorNormalize( v2 );
1232
1233                         // skip co-linear points
1234                         #define COLINEAR_EPSILON 0.001
1235                         if ((fabs( v1[0] - v2[0] ) <= COLINEAR_EPSILON) &&
1236                                 (fabs( v1[1] - v2[1] ) <= COLINEAR_EPSILON) &&
1237                                 (fabs( v1[2] - v2[2] ) <= COLINEAR_EPSILON))
1238                         {
1239                                 int j;
1240                                 for (j = i + 1; j < lnumverts; ++j)
1241                                 {
1242                                         int k;
1243                                         for (k = 0; k < VERTEXSIZE; ++k)
1244                                                 poly->verts[j - 1][k] = poly->verts[j][k];
1245                                 }
1246                                 --lnumverts;
1247                                 ++nColinElim;
1248                                 // retry next vertex next time, which is now current vertex
1249                                 --i;
1250                         }
1251                 }
1252         }
1253         */
1254         poly->numverts = lnumverts;
1255 }
1256
1257 /*
1258 ========================
1259 GL_CreateSurfaceLightmap
1260 ========================
1261 */
1262 void GL_CreateSurfaceLightmap (msurface_t *surf)
1263 {
1264         int             smax, tmax;
1265
1266         if (surf->flags & (SURF_DRAWSKY|SURF_DRAWTURB))
1267                 return;
1268
1269         smax = (surf->extents[0]>>4)+1;
1270         tmax = (surf->extents[1]>>4)+1;
1271
1272         surf->lightmaptexturenum = AllocBlock (smax, tmax, &surf->light_s, &surf->light_t);
1273         if (nosubimage || nosubimagefragments)
1274                 return;
1275         glBindTexture(GL_TEXTURE_2D, lightmap_textures + surf->lightmaptexturenum);
1276         smax = ((surf->extents[0]>>4)+lightmapalign) & lightmapalignmask;
1277         if (lightmaprgba)
1278         {
1279                 R_BuildLightMap (surf, templight, smax * 4);
1280                 glTexSubImage2D(GL_TEXTURE_2D, 0, surf->light_s, surf->light_t, smax, tmax, GL_RGBA, GL_UNSIGNED_BYTE, templight);
1281         }
1282         else
1283         {
1284                 R_BuildLightMap (surf, templight, smax * 3);
1285                 glTexSubImage2D(GL_TEXTURE_2D, 0, surf->light_s, surf->light_t, smax, tmax, GL_RGB , GL_UNSIGNED_BYTE, templight);
1286         }
1287 }
1288
1289
1290 /*
1291 ==================
1292 GL_BuildLightmaps
1293
1294 Builds the lightmap texture
1295 with all the surfaces from all brush models
1296 ==================
1297 */
1298 void GL_BuildLightmaps (void)
1299 {
1300         int             i, j;
1301         model_t *m;
1302
1303         memset (allocated, 0, sizeof(allocated));
1304
1305         r_framecount = 1;               // no dlightcache
1306
1307         if (gl_nosubimagefragments.value)
1308                 nosubimagefragments = 1;
1309         else
1310                 nosubimagefragments = 0;
1311
1312         if (gl_nosubimage.value)
1313                 nosubimage = 1;
1314         else
1315                 nosubimage = 0;
1316
1317         if (gl_lightmaprgba.value)
1318         {
1319                 lightmaprgba = true;
1320                 lightmapbytes = 4;
1321         }
1322         else
1323         {
1324                 lightmaprgba = false;
1325                 lightmapbytes = 3;
1326         }
1327
1328         // LordHavoc: NVIDIA seems to have a broken glTexSubImage2D,
1329         //            it needs to be aligned on 4 pixel boundaries...
1330         //            so I implemented an adjustable lightmap alignment
1331         if (gl_lightmapalign.value < 1)
1332                 gl_lightmapalign.value = 1;
1333         if (gl_lightmapalign.value > 16)
1334                 gl_lightmapalign.value = 16;
1335         lightmapalign = 1;
1336         while (lightmapalign < gl_lightmapalign.value)
1337                 lightmapalign <<= 1;
1338         gl_lightmapalign.value = lightmapalign;
1339         lightmapalignmask = ~(lightmapalign - 1);
1340         if (nosubimagefragments || nosubimage)
1341         {
1342                 lightmapalign = 1;
1343                 lightmapalignmask = ~0;
1344         }
1345
1346         if (!lightmap_textures)
1347         {
1348                 lightmap_textures = texture_extension_number;
1349                 texture_extension_number += MAX_LIGHTMAPS;
1350         }
1351
1352         for (j=1 ; j<MAX_MODELS ; j++)
1353         {
1354                 m = cl.model_precache[j];
1355                 if (!m)
1356                         break;
1357                 if (m->name[0] == '*')
1358                         continue;
1359                 r_pcurrentvertbase = m->vertexes;
1360                 currentmodel = m;
1361                 for (i=0 ; i<m->numsurfaces ; i++)
1362                 {
1363                         if ( m->surfaces[i].flags & SURF_DRAWTURB )
1364                                 continue;
1365                         if ( m->surfaces[i].flags & SURF_DRAWSKY )
1366                                 continue;
1367                         GL_CreateSurfaceLightmap (m->surfaces + i);
1368                         BuildSurfaceDisplayList (m->surfaces + i);
1369                 }
1370         }
1371
1372         if (nosubimage || nosubimagefragments)
1373         {
1374                 if (gl_mtexable)
1375                         qglSelectTexture(gl_mtex_enum+1);
1376                 for (i = 0;i < MAX_LIGHTMAPS;i++)
1377                 {
1378                         if (!allocated[i][0])
1379                                 break;
1380                         lightmapupdate[i][0] = BLOCK_HEIGHT;
1381                         lightmapupdate[i][1] = 0;
1382                         glBindTexture(GL_TEXTURE_2D, lightmap_textures + i);
1383                         glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
1384                         glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
1385                         if (lightmaprgba)
1386                                 glTexImage2D(GL_TEXTURE_2D, 0, 3, BLOCK_WIDTH, BLOCK_HEIGHT, 0, GL_RGBA, GL_UNSIGNED_BYTE, lightmaps[i]);
1387                         else
1388                                 glTexImage2D(GL_TEXTURE_2D, 0, 3, BLOCK_WIDTH, BLOCK_HEIGHT, 0, GL_RGB, GL_UNSIGNED_BYTE, lightmaps[i]);
1389                 }
1390                 if (gl_mtexable)
1391                         qglSelectTexture(gl_mtex_enum+0);
1392         }
1393 }
1394