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", "1"};
  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_funnywalls = {"gl_funnywalls", "0"}; // LordHavoc: see BuildSurfaceDisplayList
  52
  53 qboolean lightmaprgba, nosubimagefragments, nosubimage;
  54 int lightmapbytes;
  55
  56 qboolean skyisvisible;
  57 extern qboolean gl_arrays;
  58
  59 extern int r_dlightframecount;
  60
  61 void glrsurf_init()
  62 {
  63         int i;
  64         for (i = 0;i < MAX_LIGHTMAPS;i++)
  65                 lightmaps[i] = NULL;
  66         Cvar_RegisterVariable(&gl_lightmapalign);
  67         Cvar_RegisterVariable(&gl_lightmaprgba);
  68         Cvar_RegisterVariable(&gl_nosubimagefragments);
  69         Cvar_RegisterVariable(&gl_nosubimage);
  70         Cvar_RegisterVariable(&r_ambient);
  71 //      Cvar_RegisterVariable(&gl_funnywalls);
  72         Cvar_RegisterVariable(&gl_vertex);
  73         // check if it's the glquake minigl driver
  74         if (strncasecmp(gl_vendor,"3Dfx",4)==0)
  75         if (!gl_arrays)
  76         {
  77 //              Cvar_SetValue("gl_nosubimagefragments", 1);
  78 //              Cvar_SetValue("gl_nosubimage", 1);
  79                 Cvar_SetValue("gl_lightmode", 0);
  80         }
  81 }
  82
  83 extern qboolean lighthalf;
  84 /*
  85 ===============
  86 R_BuildLightMap
  87
  88 Combine and scale multiple lightmaps into the 8.8 format in blocklights
  89 ===============
  90 */
  91 void R_BuildLightMap (msurface_t *surf, byte *dest, int stride)
  92 {
  93         int                     smax, tmax;
  94         int                     t;
  95         int                     i, j, size;
  96         byte            *lightmap;
  97         int                     scale;
  98         int                     maps;
  99         int                     *bl;
 100
 101         surf->cached_lighthalf = lighthalf;
 102         surf->cached_ambient = r_ambient.value;
 103
 104         smax = (surf->extents[0]>>4)+1;
 105         tmax = (surf->extents[1]>>4)+1;
 106         size = smax*tmax;
 107         lightmap = surf->samples;
 108
 109 // set to full bright if no light data
 110         if (currententity->effects & EF_FULLBRIGHT || !cl.worldmodel->lightdata)
 111         {
 112                 bl = blocklights;
 113                 for (i=0 ; i<size ; i++)
 114                 {
 115                         *bl++ = 255*256;
 116                         *bl++ = 255*256;
 117                         *bl++ = 255*256;
 118                 }
 119         }
 120         else
 121         {
 122 // clear to no light
 123                 bl = blocklights;
 124                 j = r_ambient.value * 512.0f; // would be 256.0f logically, but using 512.0f to match winquake style
 125                 for (i=0 ; i<size ; i++)
 126                 {
 127                         *bl++ = j;
 128                         *bl++ = j;
 129                         *bl++ = j;
 130                 }
 131
 132 // add all the lightmaps
 133                 if (lightmap)
 134                         for (maps = 0;maps < MAXLIGHTMAPS && surf->styles[maps] != 255;maps++)
 135                         {
 136                                 scale = d_lightstylevalue[surf->styles[maps]];
 137                                 surf->cached_light[maps] = scale;       // 8.8 fraction
 138                                 bl = blocklights;
 139                                 for (i=0 ; i<size ; i++)
 140                                 {
 141                                         *bl++ += *lightmap++ * scale;
 142                                         *bl++ += *lightmap++ * scale;
 143                                         *bl++ += *lightmap++ * scale;
 144                                 }
 145                         }
 146         }
 147         stride -= (smax*lightmapbytes);
 148         bl = blocklights;
 149         if (lighthalf)
 150         {
 151                 // LordHavoc: I shift down by 8 unlike GLQuake's 7,
 152                 // the image is brightened as a processing pass
 153                 if (lightmaprgba)
 154                 {
 155                         for (i=0 ; i<tmax ; i++, dest += stride)
 156                         {
 157                                 for (j=0 ; j<smax ; j++)
 158                                 {
 159                                         t = *bl++ >> 8;if (t > 255) t = 255;else if (t < 0) t = 0;*dest++ = t;
 160                                         t = *bl++ >> 8;if (t > 255) t = 255;else if (t < 0) t = 0;*dest++ = t;
 161                                         t = *bl++ >> 8;if (t > 255) t = 255;else if (t < 0) t = 0;*dest++ = t;
 162                                         *dest++ = 255;
 163                                 }
 164                         }
 165                 }
 166                 else
 167                 {
 168                         for (i=0 ; i<tmax ; i++, dest += stride)
 169                         {
 170                                 for (j=0 ; j<smax ; j++)
 171                                 {
 172                                         t = *bl++ >> 8;if (t > 255) t = 255;else if (t < 0) t = 0;*dest++ = t;
 173                                         t = *bl++ >> 8;if (t > 255) t = 255;else if (t < 0) t = 0;*dest++ = t;
 174                                         t = *bl++ >> 8;if (t > 255) t = 255;else if (t < 0) t = 0;*dest++ = t;
 175                                 }
 176                         }
 177                 }
 178         }
 179         else
 180         {
 181                 if (lightmaprgba)
 182                 {
 183                         for (i=0 ; i<tmax ; i++, dest += stride)
 184                         {
 185                                 for (j=0 ; j<smax ; j++)
 186                                 {
 187                                         t = *bl++ >> 7;if (t > 255) t = 255;else if (t < 0) t = 0;*dest++ = t;
 188                                         t = *bl++ >> 7;if (t > 255) t = 255;else if (t < 0) t = 0;*dest++ = t;
 189                                         t = *bl++ >> 7;if (t > 255) t = 255;else if (t < 0) t = 0;*dest++ = t;
 190                                         *dest++ = 255;
 191                                 }
 192                         }
 193                 }
 194                 else
 195                 {
 196                         for (i=0 ; i<tmax ; i++, dest += stride)
 197                         {
 198                                 for (j=0 ; j<smax ; j++)
 199                                 {
 200                                         t = *bl++ >> 7;if (t > 255) t = 255;else if (t < 0) t = 0;*dest++ = t;
 201                                         t = *bl++ >> 7;if (t > 255) t = 255;else if (t < 0) t = 0;*dest++ = t;
 202                                         t = *bl++ >> 7;if (t > 255) t = 255;else if (t < 0) t = 0;*dest++ = t;
 203                                 }
 204                         }
 205                 }
 206         }
 207 }
 208
 209 byte templight[32*32*4];
 210
 211 void R_UpdateLightmap(msurface_t *s, int lnum)
 212 {
 213         int smax, tmax;
 214         // upload the new lightmap texture fragment
 215         glBindTexture(GL_TEXTURE_2D, lightmap_textures + lnum);
 216         if (nosubimage || nosubimagefragments)
 217         {
 218                 if (lightmapupdate[lnum][0] > s->light_t)
 219                         lightmapupdate[lnum][0] = s->light_t;
 220                 if (lightmapupdate[lnum][1] < (s->light_t + ((s->extents[1]>>4)+1)))
 221                         lightmapupdate[lnum][1] = (s->light_t + ((s->extents[1]>>4)+1));
 222                 if (lightmaprgba)
 223                         R_BuildLightMap (s, lightmaps[s->lightmaptexturenum] + (s->light_t * BLOCK_WIDTH + s->light_s) * 4, BLOCK_WIDTH * 4);
 224                 else
 225                         R_BuildLightMap (s, lightmaps[s->lightmaptexturenum] + (s->light_t * BLOCK_WIDTH + s->light_s) * 3, BLOCK_WIDTH * 3);
 226         }
 227         else
 228         {
 229                 smax = ((s->extents[0]>>4)+lightmapalign) & lightmapalignmask;
 230                 tmax = (s->extents[1]>>4)+1;
 231                 if (lightmaprgba)
 232                 {
 233                         R_BuildLightMap (s, templight, smax * 4);
 234                         glTexSubImage2D(GL_TEXTURE_2D, 0, s->light_s, s->light_t, smax, tmax, GL_RGBA, GL_UNSIGNED_BYTE, templight);
 235                 }
 236                 else
 237                 {
 238                         R_BuildLightMap (s, templight, smax * 3);
 239                         glTexSubImage2D(GL_TEXTURE_2D, 0, s->light_s, s->light_t, smax, tmax, GL_RGB , GL_UNSIGNED_BYTE, templight);
 240                 }
 241         }
 242 }
 243
 244
 245 /*
 246 ===============
 247 R_TextureAnimation
 248
 249 Returns the proper texture for a given time and base texture
 250 ===============
 251 */
 252 texture_t *R_TextureAnimation (texture_t *base)
 253 {
 254         texture_t *original;
 255         int             relative;
 256         int             count;
 257
 258         if (currententity->frame)
 259         {
 260                 if (base->alternate_anims)
 261                         base = base->alternate_anims;
 262         }
 263
 264         if (!base->anim_total)
 265                 return base;
 266
 267         original = base;
 268
 269         relative = (int)(cl.time*10) % base->anim_total;
 270
 271         count = 0;
 272         while (base->anim_min > relative || base->anim_max <= relative)
 273         {
 274                 base = base->anim_next;
 275                 if (!base)
 276                 {
 277                         Con_Printf("R_TextureAnimation: broken cycle");
 278                         return original;
 279                 }
 280                 if (++count > 100)
 281                 {
 282                         Con_Printf("R_TextureAnimation: infinite cycle");
 283                         return original;
 284                 }
 285         }
 286
 287         return base;
 288 }
 289
 290
 291 /*
 292 =============================================================
 293
 294         BRUSH MODELS
 295
 296 =============================================================
 297 */
 298
 299
 300 extern  int             solidskytexture;
 301 extern  int             alphaskytexture;
 302 extern  float   speedscale;             // for top sky and bottom sky
 303
 304 qboolean mtexenabled = false;
 305
 306 extern char skyname[];
 307
 308 void R_DynamicLightPoint(vec3_t color, vec3_t org, int *dlightbits);
 309 //extern cvar_t r_dynamicwater;
 310 float   turbsin[256] =
 311 {
 312         #include "gl_warp_sin.h"
 313 };
 314 #define TURBSCALE (256.0 / (2 * M_PI))
 315
 316
 317 void UploadLightmaps()
 318 {
 319         int i;
 320         if (nosubimage || nosubimagefragments)
 321         {
 322                 for (i = 0;i < MAX_LIGHTMAPS;i++)
 323                 {
 324                         if (lightmapupdate[i][0] < lightmapupdate[i][1])
 325                         {
 326                                 glBindTexture(GL_TEXTURE_2D, lightmap_textures + i);
 327                                 if (nosubimage)
 328                                 {
 329                                         if (lightmaprgba)
 330                                                 glTexImage2D(GL_TEXTURE_2D, 0, 3, BLOCK_WIDTH, BLOCK_HEIGHT, 0, GL_RGBA, GL_UNSIGNED_BYTE, lightmaps[i]);
 331                                         else
 332                                                 glTexImage2D(GL_TEXTURE_2D, 0, 3, BLOCK_WIDTH, BLOCK_HEIGHT, 0, GL_RGB, GL_UNSIGNED_BYTE, lightmaps[i]);
 333                                 }
 334                                 else
 335                                 {
 336                                         if (lightmaprgba)
 337                                                 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]));
 338                                         else
 339                                                 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]));
 340                                 }
 341                         }
 342                         lightmapupdate[i][0] = BLOCK_HEIGHT;
 343                         lightmapupdate[i][1] = 0;
 344                 }
 345         }
 346 }
 347
 348 void R_SkySurf(msurface_t *s, qboolean transform)
 349 {
 350         glpoly_t *p;
 351         int i;
 352         float *v;
 353         for (p=s->polys ; p ; p=p->next)
 354         {
 355                 if (currentskypoly < MAX_SKYPOLYS && currentskyvert + p->numverts <= MAX_SKYVERTS)
 356                 {
 357                         skypoly[currentskypoly].firstvert = currentskyvert;
 358                         skypoly[currentskypoly++].verts = p->numverts;
 359                         if (transform)
 360                         {
 361                                 for (i = 0,v = p->verts[0];i < p->numverts;i++, v += VERTEXSIZE)
 362                                 {
 363                                         softwaretransform(v, skyvert[currentskyvert].v);
 364                                         currentskyvert++;
 365                                 }
 366                         }
 367                         else
 368                         {
 369                                 for (i = 0,v = p->verts[0];i < p->numverts;i++, v += VERTEXSIZE)
 370                                 {
 371                                         skyvert[currentskyvert].v[0] = v[0];
 372                                         skyvert[currentskyvert].v[1] = v[1];
 373                                         skyvert[currentskyvert++].v[2] = v[2];
 374                                 }
 375                         }
 376                 }
 377         }
 378 }
 379
 380 void R_WaterSurf(msurface_t *s, texture_t *t, qboolean transform, int alpha)
 381 {
 382         int             i, a, b;
 383         unsigned int c;
 384         float   cr, cg, cb, radius, radius2, f;
 385         float   os = turbsin[(int)(realtime * TURBSCALE) & 255], ot = turbsin[(int)(realtime * TURBSCALE + 96.0) & 255];
 386         glpoly_t *p;
 387         float   wvert[64*6], *wv, *v, *lightorigin;
 388         dlight_t *light;
 389         wv = wvert;
 390         for (p = s->polys;p;p = p->next)
 391         {
 392                 for (i = 0, v = p->verts[0];i < p->numverts;i++, v += VERTEXSIZE)
 393                 {
 394                         if (transform)
 395                                 softwaretransform(v, wv);
 396                         else
 397                                 VectorCopy(v, wv);
 398                         if (r_waterripple.value)
 399                                 wv[2] += r_waterripple.value * turbsin[(int)((wv[0]*0.125f+realtime) * TURBSCALE) & 255] * turbsin[(int)((wv[1]*0.125f+realtime) * TURBSCALE) & 255] * (1.0f / 64.0f);
 400                         wv[3] = wv[4] = wv[5] = 128.0f;
 401                         wv += 6;
 402                 }
 403         }
 404         if (s->dlightframe == r_dlightframecount && r_dynamic.value)
 405         {
 406                 for (a = 0;a < 8;a++)
 407                 {
 408                         if (c = s->dlightbits[a])
 409                         {
 410                                 for (b = 0;c && b < 32;b++)
 411                                 {
 412                                         if (c & (1 << b))
 413                                         {
 414                                                 c -= (1 << b);
 415                                                 light = &cl_dlights[a * 32 + b];
 416                                                 lightorigin = light->origin;
 417                                                 cr = light->color[0];
 418                                                 cg = light->color[1];
 419                                                 cb = light->color[2];
 420                                                 radius = light->radius*light->radius*16.0f;
 421                                                 radius2 = radius * 16.0f;
 422                                                 wv = wvert;
 423                                                 for (p = s->polys;p;p = p->next)
 424                                                 {
 425                                                         for (i = 0;i < p->numverts;i++, wv += 6)
 426                                                         {
 427                                                                 f = VectorDistance2(wv, lightorigin);
 428                                                                 if (f < radius)
 429                                                                 {
 430                                                                         f = radius2 / (f + 65536.0f);
 431                                                                         wv[3] += cr * f;
 432                                                                         wv[4] += cg * f;
 433                                                                         wv[5] += cb * f;
 434                                                                 }
 435                                                         }
 436                                                 }
 437                                         }
 438                                         c >>= 1;
 439                                         b++;
 440                                 }
 441                         }
 442                 }
 443         }
 444         wv = wvert;
 445         // FIXME: make fog texture if water texture is transparent?
 446         if (lighthalf)
 447         {
 448                 for (p=s->polys ; p ; p=p->next)
 449                 {
 450                         transpolybegin(t->gl_texturenum, t->gl_glowtexturenum, 0, TPOLYTYPE_ALPHA);
 451                         for (i = 0,v = p->verts[0];i < p->numverts;i++, v += VERTEXSIZE, wv += 6)
 452                                 transpolyvert(wv[0], wv[1], wv[2], (v[3] + os) * (1.0f/64.0f), (v[4] + ot) * (1.0f/64.0f), (int) wv[3] >> 1,(int) wv[4] >> 1,(int) wv[5] >> 1,alpha);
 453                         transpolyend();
 454                 }
 455         }
 456         else
 457         {
 458                 for (p=s->polys ; p ; p=p->next)
 459                 {
 460                         transpolybegin(t->gl_texturenum, t->gl_glowtexturenum, 0, TPOLYTYPE_ALPHA);
 461                         for (i = 0,v = p->verts[0];i < p->numverts;i++, v += VERTEXSIZE, wv += 6)
 462                                 transpolyvert(wv[0], wv[1], wv[2], (v[3] + os) * (1.0f/64.0f), (v[4] + ot) * (1.0f/64.0f), (int) wv[3],(int) wv[4],(int) wv[5],alpha);
 463                         transpolyend();
 464                 }
 465         }
 466 }
 467
 468 void R_WallSurf(msurface_t *s, texture_t *t, qboolean transform)
 469 {
 470         int                     i, a, b;
 471         unsigned int c;
 472         glpoly_t        *p;
 473         float           wvert[64*6], *wv, *v, cr, cg, cb, radius, radius2, f, *lightorigin;
 474         dlight_t        *light;
 475         // check for lightmap modification
 476         if (r_dynamic.value)
 477         {
 478                 if (r_ambient.value != s->cached_ambient || lighthalf != s->cached_lighthalf
 479                 || (s->styles[0] != 255 && d_lightstylevalue[s->styles[0]] != s->cached_light[0])
 480                 || (s->styles[1] != 255 && d_lightstylevalue[s->styles[1]] != s->cached_light[1])
 481                 || (s->styles[2] != 255 && d_lightstylevalue[s->styles[2]] != s->cached_light[2])
 482                 || (s->styles[3] != 255 && d_lightstylevalue[s->styles[3]] != s->cached_light[3]))
 483                         R_UpdateLightmap(s, s->lightmaptexturenum);
 484         }
 485         wv = wvert;
 486         for (p = s->polys;p;p = p->next)
 487         {
 488                 for (i = 0, v = p->verts[0];i < p->numverts;i++, v += VERTEXSIZE)
 489                 {
 490                         if (transform)
 491                                 softwaretransform(v, wv);
 492                         else
 493                                 VectorCopy(v, wv);
 494                         wv[3] = wv[4] = wv[5] = 0.0f;
 495                         wv += 6;
 496                 }
 497         }
 498         if (s->dlightframe == r_dlightframecount && r_dynamic.value)
 499         {
 500                 for (a = 0;a < 8;a++)
 501                 {
 502                         if (c = s->dlightbits[a])
 503                         {
 504                                 for (b = 0;c && b < 32;b++)
 505                                 {
 506                                         if (c & (1 << b))
 507                                         {
 508                                                 c -= (1 << b);
 509                                                 light = &cl_dlights[a * 32 + b];
 510                                                 lightorigin = light->origin;
 511                                                 cr = light->color[0];
 512                                                 cg = light->color[1];
 513                                                 cb = light->color[2];
 514                                                 radius = light->radius*light->radius*16.0f;
 515                                                 radius2 = radius * 16.0f;
 516                                                 wv = wvert;
 517                                                 for (p = s->polys;p;p = p->next)
 518                                                 {
 519                                                         for (i = 0, v = p->verts[0];i < p->numverts;i++, v += VERTEXSIZE)
 520                                                         {
 521                                                                 f = VectorDistance2(wv, lightorigin);
 522                                                                 if (f < radius)
 523                                                                 {
 524                                                                         f = radius2 / (f + 65536.0f);
 525                                                                         wv[3] += cr * f;
 526                                                                         wv[4] += cg * f;
 527                                                                         wv[5] += cb * f;
 528                                                                 }
 529                                                                 wv += 6;
 530                                                         }
 531                                                 }
 532                                         }
 533                                 }
 534                         }
 535                 }
 536         }
 537         wv = wvert;
 538         for (p = s->polys;p;p = p->next)
 539         {
 540                 if (currentwallpoly >= MAX_WALLPOLYS)
 541                         break;
 542                 v = p->verts[0];
 543                 wallpoly[currentwallpoly].texnum = (unsigned short) t->gl_texturenum;
 544                 wallpoly[currentwallpoly].lighttexnum = (unsigned short) lightmap_textures + s->lightmaptexturenum;
 545                 wallpoly[currentwallpoly].glowtexnum = (unsigned short) t->gl_glowtexturenum;
 546                 wallpoly[currentwallpoly].firstvert = currentwallvert;
 547                 wallpoly[currentwallpoly].numverts = p->numverts;
 548                 wallpoly[currentwallpoly++].lit = true;
 549                 for (i = 0;i<p->numverts;i++, v += VERTEXSIZE)
 550                 {
 551                         wallvert[currentwallvert].r = (byte) (bound(0, (int) wv[3], 255));
 552                         wallvert[currentwallvert].g = (byte) (bound(0, (int) wv[4], 255));
 553                         wallvert[currentwallvert].b = (byte) (bound(0, (int) wv[5], 255));
 554                         wallvert[currentwallvert].a = 255;
 555                         wallvert[currentwallvert].vert[0] = wv[0];
 556                         wallvert[currentwallvert].vert[1] = wv[1];
 557                         wallvert[currentwallvert].vert[2] = wv[2];
 558                         wallvert[currentwallvert].s = v[3];
 559                         wallvert[currentwallvert].t = v[4];
 560                         wallvert[currentwallvert].u = v[5];
 561                         wallvert[currentwallvert++].v = v[6];
 562                         wv += 6;
 563                 }
 564         }
 565 }
 566
 567 // LordHavoc: transparent brush models
 568 extern int r_dlightframecount;
 569 extern float modelalpha;
 570 //extern vec3_t shadecolor;
 571 //qboolean R_CullBox (vec3_t mins, vec3_t maxs);
 572 //void R_DynamicLightPoint(vec3_t color, vec3_t org, int *dlightbits);
 573 //void R_DynamicLightPointNoMask(vec3_t color, vec3_t org);
 574 //void EmitWaterPolys (msurface_t *fa);
 575
 576 void R_WallSurfVertex(msurface_t *s, texture_t *t, qboolean transform)
 577 {
 578         int                     i, a, b, alpha;
 579         unsigned int c;
 580         glpoly_t        *p;
 581         float           wvert[64*6], *wv, *v, cr, cg, cb, radius, radius2, f, *lightorigin;
 582         int                     smax, tmax, size3;
 583         float           scale;
 584         byte            *lm;
 585         dlight_t        *light;
 586         smax = (s->extents[0]>>4)+1;
 587         tmax = (s->extents[1]>>4)+1;
 588         size3 = smax*tmax*3; // *3 for colored lighting
 589         alpha = (int) (modelalpha * 255.0f);
 590         // check for lightmap modification
 591         if (r_dynamic.value)
 592         {
 593                 if (r_ambient.value != s->cached_ambient || lighthalf != s->cached_lighthalf
 594                 || (s->styles[0] != 255 && d_lightstylevalue[s->styles[0]] != s->cached_light[0])
 595                 || (s->styles[1] != 255 && d_lightstylevalue[s->styles[1]] != s->cached_light[1])
 596                 || (s->styles[2] != 255 && d_lightstylevalue[s->styles[2]] != s->cached_light[2])
 597                 || (s->styles[3] != 255 && d_lightstylevalue[s->styles[3]] != s->cached_light[3]))
 598                         R_UpdateLightmap(s, s->lightmaptexturenum);
 599         }
 600         wv = wvert;
 601         for (p = s->polys;p;p = p->next)
 602         {
 603                 for (i = 0, v = p->verts[0];i < p->numverts;i++, v += VERTEXSIZE)
 604                 {
 605                         if (transform)
 606                                 softwaretransform(v, wv);
 607                         else
 608                                 VectorCopy(v, wv);
 609                         wv[3] = wv[4] = wv[5] = r_ambient.value * 2.0f;
 610                         if (s->styles[0] != 255)
 611                         {
 612                                 lm = (byte *)((long) s->samples + ((int) v[8] * smax + (int) v[7]) * 3); // LordHavoc: *3 for colored lighting
 613                                 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;
 614                                 if (s->styles[1] != 255)
 615                                 {
 616                                         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;
 617                                         if (s->styles[2] != 255)
 618                                         {
 619                                                 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;
 620                                                 if (s->styles[3] != 255)
 621                                                 {
 622                                                         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;
 623                                                 }
 624                                         }
 625                                 }
 626                         }
 627                         wv += 6;
 628                 }
 629         }
 630         if (s->dlightframe == r_dlightframecount && r_dynamic.value)
 631         {
 632                 for (a = 0;a < 8;a++)
 633                 {
 634                         if (c = s->dlightbits[a])
 635                         {
 636                                 for (b = 0;c && b < 32;b++)
 637                                 {
 638                                         if (c & (1 << b))
 639                                         {
 640                                                 c -= (1 << b);
 641                                                 light = &cl_dlights[a * 32 + b];
 642                                                 lightorigin = light->origin;
 643                                                 cr = light->color[0];
 644                                                 cg = light->color[1];
 645                                                 cb = light->color[2];
 646                                                 radius = light->radius*light->radius*16.0f;
 647                                                 radius2 = radius * 16.0f;
 648                                                 wv = wvert;
 649                                                 for (p = s->polys;p;p = p->next)
 650                                                 {
 651                                                         for (i = 0, v = p->verts[0];i < p->numverts;i++, v += VERTEXSIZE)
 652                                                         {
 653                                                                 f = VectorDistance2(wv, lightorigin);
 654                                                                 if (f < radius)
 655                                                                 {
 656                                                                         f = radius2 / (f + 65536.0f);
 657                                                                         wv[3] += cr * f;
 658                                                                         wv[4] += cg * f;
 659                                                                         wv[5] += cb * f;
 660                                                                 }
 661                                                                 wv += 6;
 662                                                         }
 663                                                 }
 664                                         }
 665                                         c >>= 1;
 666                                         b++;
 667                                 }
 668                         }
 669                 }
 670         }
 671         wv = wvert;
 672         if (currententity->colormod[0] != 1 || currententity->colormod[1] != 1 || currententity->colormod[2] != 1)
 673         {
 674                 if (lighthalf)
 675                 {
 676                         for (p = s->polys;p;p = p->next)
 677                         {
 678                                 v = p->verts[0];
 679                                 transpolybegin(t->gl_texturenum, t->gl_glowtexturenum, 0, currententity->effects & EF_ADDITIVE ? TPOLYTYPE_ADD : TPOLYTYPE_ALPHA);
 680                                 for (i = 0,v = p->verts[0];i < p->numverts;i++, v += VERTEXSIZE, wv += 6)
 681                                         transpolyvert(wv[0], wv[1], wv[2], v[3], v[4], (int) (wv[3] * currententity->colormod[0]) >> 1,(int) (wv[4] * currententity->colormod[1]) >> 1,(int) (wv[5] * currententity->colormod[0]) >> 1,alpha);
 682                                 transpolyend();
 683                         }
 684                 }
 685                 else
 686                 {
 687                         for (p = s->polys;p;p = p->next)
 688                         {
 689                                 v = p->verts[0];
 690                                 transpolybegin(t->gl_texturenum, t->gl_glowtexturenum, 0, currententity->effects & EF_ADDITIVE ? TPOLYTYPE_ADD : TPOLYTYPE_ALPHA);
 691                                 for (i = 0,v = p->verts[0];i < p->numverts;i++, v += VERTEXSIZE, wv += 6)
 692                                         transpolyvert(wv[0], wv[1], wv[2], v[3], v[4], (int) (wv[3] * currententity->colormod[0]),(int) (wv[4] * currententity->colormod[1]),(int) (wv[5] * currententity->colormod[2]),alpha);
 693                                 transpolyend();
 694                         }
 695                 }
 696         }
 697         else
 698         {
 699                 if (lighthalf)
 700                 {
 701                         for (p = s->polys;p;p = p->next)
 702                         {
 703                                 v = p->verts[0];
 704                                 transpolybegin(t->gl_texturenum, t->gl_glowtexturenum, 0, currententity->effects & EF_ADDITIVE ? TPOLYTYPE_ADD : TPOLYTYPE_ALPHA);
 705                                 for (i = 0,v = p->verts[0];i < p->numverts;i++, v += VERTEXSIZE, wv += 6)
 706                                         transpolyvert(wv[0], wv[1], wv[2], v[3], v[4], (int) wv[3] >> 1,(int) wv[4] >> 1,(int) wv[5] >> 1,alpha);
 707                                 transpolyend();
 708                         }
 709                 }
 710                 else
 711                 {
 712                         for (p = s->polys;p;p = p->next)
 713                         {
 714                                 v = p->verts[0];
 715                                 transpolybegin(t->gl_texturenum, t->gl_glowtexturenum, 0, currententity->effects & EF_ADDITIVE ? TPOLYTYPE_ADD : TPOLYTYPE_ALPHA);
 716                                 for (i = 0,v = p->verts[0];i < p->numverts;i++, v += VERTEXSIZE, wv += 6)
 717                                         transpolyvert(wv[0], wv[1], wv[2], v[3], v[4], (int) wv[3],(int) wv[4],(int) wv[5],alpha);
 718                                 transpolyend();
 719                         }
 720                 }
 721         }
 722 }
 723
 724 /*
 725 ================
 726 DrawTextureChains
 727 ================
 728 */
 729 extern qboolean hlbsp;
 730 extern char skyname[];
 731 //extern qboolean SV_TestLine (hull_t *hull, int num, vec3_t p1, vec3_t p2);
 732 void DrawTextureChains (void)
 733 {
 734         int                     n;
 735         msurface_t      *s;
 736         texture_t       *t;
 737
 738         for (n = 0;n < cl.worldmodel->numtextures;n++)
 739         {
 740                 if (!cl.worldmodel->textures[n] || !(s = cl.worldmodel->textures[n]->texturechain))
 741                         continue;
 742                 // LordHavoc: decide the render type only once, because the surface properties were determined by texture anyway
 743                 cl.worldmodel->textures[n]->texturechain = NULL;
 744                 t = R_TextureAnimation (cl.worldmodel->textures[n]);
 745                 // sky
 746                 if (s->flags & SURF_DRAWSKY)
 747                 {
 748                         skyisvisible = true;
 749                         if (!hlbsp) // LordHavoc: HalfLife maps have freaky skypolys...
 750                                 for (;s;s = s->texturechain)
 751                                         R_SkySurf(s, false);
 752                         continue;
 753                 }
 754                 // subdivided water surface warp
 755                 if (s->flags & SURF_DRAWTURB)
 756                 {
 757                         int alpha = s->flags & SURF_DRAWNOALPHA ? 255 : r_wateralpha.value*255.0f;
 758                         for (;s;s = s->texturechain)
 759                                 R_WaterSurf(s, t, false, alpha);
 760                         continue;
 761                 }
 762                 if (gl_vertex.value)
 763                         for (;s;s = s->texturechain)
 764                                 R_WallSurfVertex(s, t, false);
 765                 else
 766                         for (;s;s = s->texturechain)
 767                                 R_WallSurf(s, t, false);
 768         }
 769 }
 770
 771 void R_NoVisMarkLights (vec3_t lightorigin, dlight_t *light, int bit, int bitindex, model_t *model);
 772
 773 /*
 774 =================
 775 R_DrawBrushModel
 776 =================
 777 */
 778 void R_DrawBrushModel (entity_t *e)
 779 {
 780         int                     i;
 781         vec3_t          mins, maxs;
 782         msurface_t      *s;
 783         model_t         *clmodel;
 784         qboolean        rotated, vertexlit = false;
 785         texture_t       *t;
 786         vec3_t          org;
 787
 788         currententity = e;
 789
 790         clmodel = e->model;
 791
 792         if (e->angles[0] || e->angles[1] || e->angles[2])
 793         {
 794                 rotated = true;
 795                 for (i=0 ; i<3 ; i++)
 796                 {
 797                         mins[i] = e->origin[i] - clmodel->radius;
 798                         maxs[i] = e->origin[i] + clmodel->radius;
 799                 }
 800         }
 801         else
 802         {
 803                 rotated = false;
 804                 VectorAdd (e->origin, clmodel->mins, mins);
 805                 VectorAdd (e->origin, clmodel->maxs, maxs);
 806         }
 807
 808         if (R_CullBox (mins, maxs))
 809                 return;
 810
 811         VectorSubtract (r_refdef.vieworg, e->origin, modelorg);
 812         if (rotated)
 813         {
 814                 vec3_t  temp;
 815                 vec3_t  forward, right, up;
 816
 817                 VectorCopy (modelorg, temp);
 818                 AngleVectors (e->angles, forward, right, up);
 819                 modelorg[0] = DotProduct (temp, forward);
 820                 modelorg[1] = -DotProduct (temp, right);
 821                 modelorg[2] = DotProduct (temp, up);
 822         }
 823
 824         s = &clmodel->surfaces[clmodel->firstmodelsurface];
 825
 826 // calculate dynamic lighting for bmodel if it's not an
 827 // instanced model
 828         for (i = 0;i < MAX_DLIGHTS;i++)
 829         {
 830                 if ((cl_dlights[i].die < cl.time) || (!cl_dlights[i].radius))
 831                         continue;
 832
 833                 VectorSubtract(cl_dlights[i].origin, currententity->origin, org);
 834                 R_NoVisMarkLights (org, &cl_dlights[i], 1<<(i&31), i >> 5, clmodel);
 835         }
 836         vertexlit = modelalpha != 1 || clmodel->firstmodelsurface == 0 || (currententity->effects & EF_FULLBRIGHT) || currententity->colormod[0] != 1 || currententity->colormod[2] != 1 || currententity->colormod[2] != 1;
 837
 838 e->angles[0] = -e->angles[0];   // stupid quake bug
 839         softwaretransformforentity (e);
 840 e->angles[0] = -e->angles[0];   // stupid quake bug
 841
 842         // draw texture
 843         for (i = 0;i < clmodel->nummodelsurfaces;i++, s++)
 844         {
 845                 if (((s->flags & SURF_PLANEBACK) == 0) == (PlaneDiff(modelorg, s->plane) >= 0))
 846                 {
 847                         if (s->flags & SURF_DRAWSKY)
 848                         {
 849                                 R_SkySurf(s, true);
 850                                 continue;
 851                         }
 852                         t = R_TextureAnimation (s->texinfo->texture);
 853                         if (s->flags & SURF_DRAWTURB)
 854                         {
 855                                 R_WaterSurf(s, t, true, s->flags & SURF_DRAWNOALPHA ? 255 : r_wateralpha.value*255.0f);
 856                                 continue;
 857                         }
 858                         if (vertexlit || s->texinfo->texture->transparent)
 859                                 R_WallSurfVertex(s, t, true);
 860                         else
 861                                 R_WallSurf(s, t, true);
 862                 }
 863         }
 864         UploadLightmaps();
 865 }
 866
 867 /*
 868 =============================================================
 869
 870         WORLD MODEL
 871
 872 =============================================================
 873 */
 874
 875 void R_StoreEfrags (efrag_t **ppefrag);
 876
 877 /*
 878 ================
 879 R_WorldNode
 880 ================
 881 */
 882 void R_WorldNode ()
 883 {
 884         int             c, side, s = 0;
 885         double  dot;
 886         struct
 887         {
 888                 double dot;
 889                 mnode_t *node;
 890         } nodestack[8192];
 891         mnode_t *node;
 892
 893         if (!(node = cl.worldmodel->nodes))
 894                 return;
 895
 896         while(1)
 897         {
 898         // if a leaf node, draw stuff
 899                 if (node->contents < 0)
 900                 {
 901                         if (node->contents != CONTENTS_SOLID)
 902                         {
 903                                 mleaf_t         *pleaf;
 904                                 pleaf = (mleaf_t *)node;
 905
 906                                 c_leafs++;
 907                                 if ((c = pleaf->nummarksurfaces))
 908                                 {
 909                                         msurface_t      **mark;
 910                                         mark = pleaf->firstmarksurface;
 911                                         do
 912                                         {
 913                                                 (*mark)->visframe = r_framecount;
 914                                                 mark++;
 915                                         } while (--c);
 916                                 }
 917
 918                                 // deal with model fragments in this leaf
 919                                 if (pleaf->efrags)
 920                                         R_StoreEfrags (&pleaf->efrags);
 921                         }
 922
 923                         if (!s)
 924                                 break;
 925                         node = nodestack[--s].node;
 926                         dot = nodestack[s].dot;
 927                         goto loc0;
 928                 }
 929
 930                 c_nodes++;
 931
 932         // node is just a decision point, so go down the apropriate sides
 933
 934         // find which side of the node we are on
 935                 dot = (node->plane->type < 3 ? modelorg[node->plane->type] : DotProduct (modelorg, node->plane->normal)) - node->plane->dist;
 936
 937         // recurse down the children, front side first
 938                 side = dot < 0;
 939                 if (node->children[side]->visframe == r_visframecount && R_NotCulledBox(node->children[side]->minmaxs, node->children[side]->minmaxs+3))
 940                 {
 941                         nodestack[s].node = node;
 942                         nodestack[s++].dot = dot;
 943                         node = node->children[side];
 944                         continue;
 945                 }
 946 loc0:
 947
 948                 // backside
 949                 side = dot >= 0;
 950         // draw stuff
 951                 if ((c = node->numsurfaces))
 952                 {
 953                         msurface_t      *surf;
 954                         surf = cl.worldmodel->surfaces + node->firstsurface;
 955
 956                         if (side)
 957                         {
 958                                 for (;c;c--, surf++)
 959                                 {
 960                                         if (surf->visframe == r_framecount && !(surf->flags & SURF_PLANEBACK))
 961                                         {
 962                                                 surf->texturechain = surf->texinfo->texture->texturechain;
 963                                                 surf->texinfo->texture->texturechain = surf;
 964                                         }
 965                                 }
 966                         }
 967                         else
 968                         {
 969                                 for (;c;c--, surf++)
 970                                 {
 971                                         if (surf->visframe == r_framecount && (surf->flags & SURF_PLANEBACK))
 972                                         {
 973                                                 surf->texturechain = surf->texinfo->texture->texturechain;
 974                                                 surf->texinfo->texture->texturechain = surf;
 975                                         }
 976                                 }
 977                         }
 978                 }
 979
 980         // recurse down the back side
 981                 if (node->children[side]->visframe == r_visframecount && R_NotCulledBox(node->children[side]->minmaxs, node->children[side]->minmaxs+3))
 982                 {
 983                         node = node->children[side];
 984                         continue;
 985                 }
 986
 987                 if (!s)
 988                         break;
 989                 node = nodestack[--s].node;
 990                 dot = nodestack[s].dot;
 991                 goto loc0;
 992         }
 993 }
 994
 995
 996 /*
 997 =============
 998 R_DrawWorld
 999 =============
1000 */
1001 void R_DrawWorld (void)
1002 {
1003         entity_t        ent;
1004
1005         memset (&ent, 0, sizeof(ent));
1006         ent.model = cl.worldmodel;
1007         ent.colormod[0] = ent.colormod[1] = ent.colormod[2] = 1;
1008         modelalpha = ent.alpha = 1;
1009         ent.scale = 1;
1010
1011         VectorCopy (r_refdef.vieworg, modelorg);
1012
1013         currententity = &ent;
1014
1015         softwaretransformidentity(); // LordHavoc: clear transform
1016
1017         if (cl.worldmodel)
1018                 R_WorldNode ();
1019
1020         glClear (GL_DEPTH_BUFFER_BIT);
1021
1022         R_PushDlights (); // now mark the lit surfaces
1023
1024         DrawTextureChains ();
1025
1026         glTexEnvf(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE);
1027         glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
1028 }
1029
1030
1031 /*
1032 ===============
1033 R_MarkLeaves
1034 ===============
1035 */
1036 void R_MarkLeaves (void)
1037 {
1038         byte    *vis;
1039         mnode_t *node;
1040         int             i;
1041
1042         if (r_oldviewleaf == r_viewleaf && !r_novis.value)
1043                 return;
1044
1045         r_visframecount++;
1046         r_oldviewleaf = r_viewleaf;
1047
1048         if (r_novis.value)
1049         {
1050                 for (i=0 ; i<cl.worldmodel->numleafs ; i++)
1051                 {
1052                         node = (mnode_t *)&cl.worldmodel->leafs[i+1];
1053                         do
1054                         {
1055                                 if (node->visframe == r_visframecount)
1056                                         break;
1057                                 node->visframe = r_visframecount;
1058                                 node = node->parent;
1059                         } while (node);
1060                 }
1061         }
1062         else
1063         {
1064                 vis = Mod_LeafPVS (r_viewleaf, cl.worldmodel);
1065
1066                 for (i=0 ; i<cl.worldmodel->numleafs ; i++)
1067                 {
1068                         if (vis[i>>3] & (1<<(i&7)))
1069                         {
1070                                 node = (mnode_t *)&cl.worldmodel->leafs[i+1];
1071                                 do
1072                                 {
1073                                         if (node->visframe == r_visframecount)
1074                                                 break;
1075                                         node->visframe = r_visframecount;
1076                                         node = node->parent;
1077                                 } while (node);
1078                         }
1079                 }
1080         }
1081 }
1082
1083
1084
1085 /*
1086 =============================================================================
1087
1088   LIGHTMAP ALLOCATION
1089
1090 =============================================================================
1091 */
1092
1093 // returns a texture number and the position inside it
1094 int AllocBlock (int w, int h, int *x, int *y)
1095 {
1096         int             i, j;
1097         int             best, best2;
1098         int             texnum;
1099
1100         for (texnum=0 ; texnum<MAX_LIGHTMAPS ; texnum++)
1101         {
1102                 best = BLOCK_HEIGHT;
1103
1104                 for (i=0 ; i<BLOCK_WIDTH-w ; i+=lightmapalign) // LordHavoc: NVIDIA has broken subimage, so align the lightmaps
1105                 {
1106                         best2 = 0;
1107
1108                         for (j=0 ; j<w ; j++)
1109                         {
1110                                 if (allocated[texnum][i+j] >= best)
1111                                         break;
1112                                 if (allocated[texnum][i+j] > best2)
1113                                         best2 = allocated[texnum][i+j];
1114                         }
1115                         if (j == w)
1116                         {       // this is a valid spot
1117                                 *x = i;
1118                                 *y = best = best2;
1119                         }
1120                 }
1121
1122                 if (best + h > BLOCK_HEIGHT)
1123                         continue;
1124
1125                 if (nosubimagefragments || nosubimage)
1126                 {
1127                         if (!lightmaps[texnum])
1128                                 lightmaps[texnum] = calloc(BLOCK_WIDTH*BLOCK_HEIGHT*4, 1);
1129                 }
1130                 // LordHavoc: clear texture to blank image, fragments are uploaded using subimage
1131                 else if (!allocated[texnum][0])
1132                 {
1133                         byte blank[BLOCK_WIDTH*BLOCK_HEIGHT*3];
1134                         memset(blank, 0, sizeof(blank));
1135                         glBindTexture(GL_TEXTURE_2D, lightmap_textures + texnum);
1136                         glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
1137                         glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
1138                         if (lightmaprgba)
1139                                 glTexImage2D (GL_TEXTURE_2D, 0, 3, BLOCK_WIDTH, BLOCK_HEIGHT, 0, GL_RGBA, GL_UNSIGNED_BYTE, blank);
1140                         else
1141                                 glTexImage2D (GL_TEXTURE_2D, 0, 3, BLOCK_WIDTH, BLOCK_HEIGHT, 0, GL_RGB, GL_UNSIGNED_BYTE, blank);
1142                 }
1143
1144                 for (i=0 ; i<w ; i++)
1145                         allocated[texnum][*x + i] = best + h;
1146
1147                 return texnum;
1148         }
1149
1150         Sys_Error ("AllocBlock: full");
1151         return 0;
1152 }
1153
1154
1155 mvertex_t       *r_pcurrentvertbase;
1156 model_t         *currentmodel;
1157
1158 int     nColinElim;
1159
1160 /*
1161 ================
1162 BuildSurfaceDisplayList
1163 ================
1164 */
1165 void BuildSurfaceDisplayList (msurface_t *fa)
1166 {
1167         int                     i, lindex, lnumverts;
1168         medge_t         *pedges, *r_pedge;
1169         int                     vertpage;
1170         float           *vec;
1171         float           s, t;
1172         glpoly_t        *poly;
1173
1174 // reconstruct the polygon
1175         pedges = currentmodel->edges;
1176         lnumverts = fa->numedges;
1177         vertpage = 0;
1178
1179         //
1180         // draw texture
1181         //
1182         poly = Hunk_Alloc (sizeof(glpoly_t) + (lnumverts-4) * VERTEXSIZE*sizeof(float));
1183         poly->next = fa->polys;
1184         poly->flags = fa->flags;
1185         fa->polys = poly;
1186         poly->numverts = lnumverts;
1187
1188         for (i=0 ; i<lnumverts ; i++)
1189         {
1190                 lindex = currentmodel->surfedges[fa->firstedge + i];
1191
1192                 if (lindex > 0)
1193                 {
1194                         r_pedge = &pedges[lindex];
1195                         vec = r_pcurrentvertbase[r_pedge->v[0]].position;
1196                 }
1197                 else
1198                 {
1199                         r_pedge = &pedges[-lindex];
1200                         vec = r_pcurrentvertbase[r_pedge->v[1]].position;
1201                 }
1202                 s = DotProduct (vec, fa->texinfo->vecs[0]) + fa->texinfo->vecs[0][3];
1203                 s /= fa->texinfo->texture->width;
1204
1205                 t = DotProduct (vec, fa->texinfo->vecs[1]) + fa->texinfo->vecs[1][3];
1206                 t /= fa->texinfo->texture->height;
1207
1208                 VectorCopy (vec, poly->verts[i]);
1209                 poly->verts[i][3] = s;
1210                 poly->verts[i][4] = t;
1211
1212                 //
1213                 // lightmap texture coordinates
1214                 //
1215                 s = DotProduct (vec, fa->texinfo->vecs[0]) + fa->texinfo->vecs[0][3];
1216                 s -= fa->texturemins[0];
1217                 poly->verts[i][7] = bound(0l, ((int)s>>4), (fa->extents[0]>>4)); // LordHavoc: raw lightmap coordinates
1218                 s += fa->light_s*16;
1219                 s += 8;
1220                 s /= BLOCK_WIDTH*16; //fa->texinfo->texture->width;
1221
1222                 t = DotProduct (vec, fa->texinfo->vecs[1]) + fa->texinfo->vecs[1][3];
1223                 t -= fa->texturemins[1];
1224                 poly->verts[i][8] = bound(0l, ((int)t>>4), (fa->extents[1]>>4)); // LordHavoc: raw lightmap coordinates
1225                 t += fa->light_t*16;
1226                 t += 8;
1227                 t /= BLOCK_HEIGHT*16; //fa->texinfo->texture->height;
1228
1229                 poly->verts[i][5] = s;
1230                 poly->verts[i][6] = t;
1231         }
1232
1233         //
1234         // remove co-linear points - Ed
1235         //
1236         /*
1237         if (!gl_keeptjunctions.value)
1238         {
1239                 for (i = 0 ; i < lnumverts ; ++i)
1240                 {
1241                         vec3_t v1, v2;
1242                         float *prev, *this, *next;
1243
1244                         prev = poly->verts[(i + lnumverts - 1) % lnumverts];
1245                         this = poly->verts[i];
1246                         next = poly->verts[(i + 1) % lnumverts];
1247
1248                         VectorSubtract( this, prev, v1 );
1249                         VectorNormalize( v1 );
1250                         VectorSubtract( next, prev, v2 );
1251                         VectorNormalize( v2 );
1252
1253                         // skip co-linear points
1254                         #define COLINEAR_EPSILON 0.001
1255                         if ((fabs( v1[0] - v2[0] ) <= COLINEAR_EPSILON) &&
1256                                 (fabs( v1[1] - v2[1] ) <= COLINEAR_EPSILON) &&
1257                                 (fabs( v1[2] - v2[2] ) <= COLINEAR_EPSILON))
1258                         {
1259                                 int j;
1260                                 for (j = i + 1; j < lnumverts; ++j)
1261                                 {
1262                                         int k;
1263                                         for (k = 0; k < VERTEXSIZE; ++k)
1264                                                 poly->verts[j - 1][k] = poly->verts[j][k];
1265                                 }
1266                                 --lnumverts;
1267                                 ++nColinElim;
1268                                 // retry next vertex next time, which is now current vertex
1269                                 --i;
1270                         }
1271                 }
1272         }
1273         */
1274         poly->numverts = lnumverts;
1275
1276         /*
1277         int                     i, k, lindex, lnumverts;
1278         medge_t         *pedges, *r_pedge;
1279         int                     vertpage, points;
1280         float           *vec;
1281         float           s, t;
1282         glpoly_t        *poly;
1283         float           point1[1024][VERTEXSIZE], point[1024][VERTEXSIZE];
1284
1285 // reconstruct the polygon
1286         pedges = currentmodel->edges;
1287         lnumverts = fa->numedges;
1288         vertpage = 0;
1289
1290         //
1291         // draw texture
1292         //
1293         for (i=0 ; i<lnumverts ; i++)
1294         {
1295                 lindex = currentmodel->surfedges[fa->firstedge + i];
1296
1297                 if (lindex > 0)
1298                 {
1299                         r_pedge = &pedges[lindex];
1300                         vec = r_pcurrentvertbase[r_pedge->v[0]].position;
1301                 }
1302                 else
1303                 {
1304                         r_pedge = &pedges[-lindex];
1305                         vec = r_pcurrentvertbase[r_pedge->v[1]].position;
1306                 }
1307                 s = DotProduct (vec, fa->texinfo->vecs[0]) + fa->texinfo->vecs[0][3];
1308                 s /= fa->texinfo->texture->width;
1309
1310                 t = DotProduct (vec, fa->texinfo->vecs[1]) + fa->texinfo->vecs[1][3];
1311                 t /= fa->texinfo->texture->height;
1312
1313                 VectorCopy (vec, point1[i]);
1314                 point1[i][3] = s;
1315                 point1[i][4] = t;
1316
1317                 //
1318                 // lightmap texture coordinates
1319                 //
1320                 s = DotProduct (vec, fa->texinfo->vecs[0]) + fa->texinfo->vecs[0][3];
1321                 s -= fa->texturemins[0];
1322                 point1[i][7] = bound(0l, ((int)s>>4), (fa->extents[0]>>4)); // LordHavoc: raw lightmap coordinates
1323                 s += fa->light_s*16;
1324                 s += 8;
1325                 s /= BLOCK_WIDTH*16; //fa->texinfo->texture->width;
1326
1327                 t = DotProduct (vec, fa->texinfo->vecs[1]) + fa->texinfo->vecs[1][3];
1328                 t -= fa->texturemins[1];
1329                 point1[i][8] = bound(0l, ((int)t>>4), (fa->extents[1]>>4)); // LordHavoc: raw lightmap coordinates
1330                 t += fa->light_t*16;
1331                 t += 8;
1332                 t /= BLOCK_HEIGHT*16; //fa->texinfo->texture->height;
1333
1334                 point1[i][5] = s;
1335                 point1[i][6] = t;
1336         }
1337
1338         if (fa->flags & (SURF_DRAWSKY | SURF_DRAWTURB))
1339         {
1340                 poly = Hunk_Alloc (sizeof(glpoly_t) + (lnumverts-4) * VERTEXSIZE*sizeof(float));
1341                 poly->next = fa->polys;
1342                 poly->flags = fa->flags;
1343                 fa->polys = poly;
1344                 poly->numverts = lnumverts;
1345                 memcpy(poly->verts, &point1[0][0], lnumverts*VERTEXSIZE*sizeof(float));
1346                 return;
1347         }
1348
1349 #define VectorCopy9(a,b) {for(k = 0;k < VERTEXSIZE;k++) b[k]=a[k];}
1350         points = 0;
1351 #if 0
1352         int                     j;
1353         float           center[VERTEXSIZE];
1354         // subdivide by placing a point at the center (more tris)
1355         // LordHavoc:
1356         // you, the reader, have stumbled upon the most amusing visual artifact I have
1357         // encountered to date, saved here for historical/hysterical reasons :)
1358         if (gl_funnywalls.value)
1359                 for (j = 0;j < 5;j++)
1360                         center[j] = 0;
1361         else
1362                 for (j = 0;j < VERTEXSIZE;j++)
1363                         center[j] = 0;
1364         for (i = 0;i < lnumverts;i++)
1365                 for (j = 0;j < VERTEXSIZE;j++)
1366                         center[j] += point1[i][j];
1367         s = 1.0f / lnumverts;
1368         for (i = 0;i < VERTEXSIZE;i++)
1369                 center[i] *= s;
1370         for (i = 0;i < lnumverts;i++)
1371         {
1372                 VectorCopy9(center, point[points]);points++;
1373                 VectorCopy9(point1[i], point[points]);points++;
1374                 VectorCopy9(point1[(i+1)%lnumverts], point[points]);points++;
1375         }
1376 #else
1377         // subdivide by turning it into a fan (less tris)
1378         for (i = 1;i < lnumverts-1;i++)
1379         {
1380                 VectorCopy9(point1[0], point[points]);points++;
1381                 VectorCopy9(point1[i], point[points]);points++;
1382                 VectorCopy9(point1[i+1], point[points]);points++;
1383         }
1384 #endif
1385 #if 0
1386         {
1387                 float p1[VERTEXSIZE], p2[VERTEXSIZE], p3[VERTEXSIZE], p4[VERTEXSIZE], p5[VERTEXSIZE], p6[VERTEXSIZE]
1388                 // now subdivide any large triangles
1389                 for (j = 0;j < points;j+=3)
1390                 {
1391                         if (points > (1024-9))
1392                                 break;
1393                         while ((max(point[j][0], max(point[j+1][0], point[j+2][0])) - min(point[j][0], min(point[j+1][0], point[j+2][0]))) > 128
1394                                 || (max(point[j][1], max(point[j+1][1], point[j+2][1])) - min(point[j][1], min(point[j+1][1], point[j+2][1]))) > 128
1395                                 || (max(point[j][2], max(point[j+1][2], point[j+2][2])) - min(point[j][2], min(point[j+1][2], point[j+2][2]))) > 128)
1396                         {
1397                                 if (points > (1024-9))
1398                                         break;
1399         #define halfway(v, a, b) for (k = 0;k < VERTEXSIZE;k++) v[k] = (a[k] + b[k]) * 0.5f;
1400                                 VectorCopy9(point[j+0], p1);
1401                                 VectorCopy9(point[j+1], p3);
1402                                 VectorCopy9(point[j+2], p5);
1403                                 halfway(p2, p1, p3);
1404                                 halfway(p4, p3, p5);
1405                                 halfway(p6, p5, p1);
1406                                 // build tri 1 (top middle)
1407                                 VectorCopy9(p1, point[j+0]);
1408                                 VectorCopy9(p2, point[j+1]);
1409                                 VectorCopy9(p6, point[j+2]);
1410                                 // build tri 2 (bottom right)
1411                                 VectorCopy9(p2, point[points+0]);
1412                                 VectorCopy9(p3, point[points+1]);
1413                                 VectorCopy9(p4, point[points+2]);
1414                                 // build tri 3 (bottom left)
1415                                 VectorCopy9(p4, point[points+3]);
1416                                 VectorCopy9(p5, point[points+4]);
1417                                 VectorCopy9(p6, point[points+5]);
1418                                 // build tri 4 (middle)
1419                                 VectorCopy9(p2, point[points+6]);
1420                                 VectorCopy9(p4, point[points+7]);
1421                                 VectorCopy9(p6, point[points+8]);
1422                                 points+=9;
1423                         }
1424                 }
1425         }
1426 #endif
1427         poly = Hunk_Alloc (sizeof(glpoly_t) + (points-4) * VERTEXSIZE*sizeof(float));
1428         poly->next = fa->polys;
1429         poly->flags = fa->flags;
1430         fa->polys = poly;
1431         poly->numverts = 0;
1432         poly->numtris = points / 3;
1433         memcpy(&poly->verts[0][0], &point[0][0], points * VERTEXSIZE*sizeof(float));
1434         */
1435 }
1436
1437 /*
1438 ========================
1439 GL_CreateSurfaceLightmap
1440 ========================
1441 */
1442 void GL_CreateSurfaceLightmap (msurface_t *surf)
1443 {
1444         int             smax, tmax;
1445
1446         if (surf->flags & (SURF_DRAWSKY|SURF_DRAWTURB))
1447                 return;
1448
1449         smax = (surf->extents[0]>>4)+1;
1450         tmax = (surf->extents[1]>>4)+1;
1451
1452         surf->lightmaptexturenum = AllocBlock (smax, tmax, &surf->light_s, &surf->light_t);
1453         if (nosubimage || nosubimagefragments)
1454                 return;
1455         glBindTexture(GL_TEXTURE_2D, lightmap_textures + surf->lightmaptexturenum);
1456         smax = ((surf->extents[0]>>4)+lightmapalign) & lightmapalignmask;
1457         if (lightmaprgba)
1458         {
1459                 R_BuildLightMap (surf, templight, smax * 4);
1460                 glTexSubImage2D(GL_TEXTURE_2D, 0, surf->light_s, surf->light_t, smax, tmax, GL_RGBA, GL_UNSIGNED_BYTE, templight);
1461         }
1462         else
1463         {
1464                 R_BuildLightMap (surf, templight, smax * 3);
1465                 glTexSubImage2D(GL_TEXTURE_2D, 0, surf->light_s, surf->light_t, smax, tmax, GL_RGB , GL_UNSIGNED_BYTE, templight);
1466         }
1467 }
1468
1469
1470 /*
1471 ==================
1472 GL_BuildLightmaps
1473
1474 Builds the lightmap texture
1475 with all the surfaces from all brush models
1476 ==================
1477 */
1478 void GL_BuildLightmaps (void)
1479 {
1480         int             i, j;
1481         model_t *m;
1482
1483         memset (allocated, 0, sizeof(allocated));
1484
1485         r_framecount = 1;               // no dlightcache
1486
1487         if (gl_nosubimagefragments.value)
1488                 nosubimagefragments = 1;
1489         else
1490                 nosubimagefragments = 0;
1491
1492         if (gl_nosubimage.value)
1493                 nosubimage = 1;
1494         else
1495                 nosubimage = 0;
1496
1497         if (gl_lightmaprgba.value)
1498         {
1499                 lightmaprgba = true;
1500                 lightmapbytes = 4;
1501         }
1502         else
1503         {
1504                 lightmaprgba = false;
1505                 lightmapbytes = 3;
1506         }
1507
1508         // LordHavoc: NVIDIA seems to have a broken glTexSubImage2D,
1509         //            it needs to be aligned on 4 pixel boundaries...
1510         //            so I implemented an adjustable lightmap alignment
1511         if (gl_lightmapalign.value < 1)
1512                 gl_lightmapalign.value = 1;
1513         if (gl_lightmapalign.value > 16)
1514                 gl_lightmapalign.value = 16;
1515         lightmapalign = 1;
1516         while (lightmapalign < gl_lightmapalign.value)
1517                 lightmapalign <<= 1;
1518         gl_lightmapalign.value = lightmapalign;
1519         lightmapalignmask = ~(lightmapalign - 1);
1520         if (nosubimagefragments || nosubimage)
1521         {
1522                 lightmapalign = 1;
1523                 lightmapalignmask = ~0;
1524         }
1525
1526         if (!lightmap_textures)
1527         {
1528                 lightmap_textures = texture_extension_number;
1529                 texture_extension_number += MAX_LIGHTMAPS;
1530         }
1531
1532         for (j=1 ; j<MAX_MODELS ; j++)
1533         {
1534                 m = cl.model_precache[j];
1535                 if (!m)
1536                         break;
1537                 if (m->name[0] == '*')
1538                         continue;
1539                 r_pcurrentvertbase = m->vertexes;
1540                 currentmodel = m;
1541                 for (i=0 ; i<m->numsurfaces ; i++)
1542                 {
1543                         if ( m->surfaces[i].flags & SURF_DRAWTURB )
1544                                 continue;
1545                         if ( m->surfaces[i].flags & SURF_DRAWSKY )
1546                                 continue;
1547                         GL_CreateSurfaceLightmap (m->surfaces + i);
1548                         BuildSurfaceDisplayList (m->surfaces + i);
1549                 }
1550         }
1551
1552         if (nosubimage || nosubimagefragments)
1553         {
1554                 if (gl_mtexable)
1555                         qglSelectTexture(gl_mtex_enum+1);
1556                 for (i = 0;i < MAX_LIGHTMAPS;i++)
1557                 {
1558                         if (!allocated[i][0])
1559                                 break;
1560                         lightmapupdate[i][0] = BLOCK_HEIGHT;
1561                         lightmapupdate[i][1] = 0;
1562                         glBindTexture(GL_TEXTURE_2D, lightmap_textures + i);
1563                         glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
1564                         glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
1565                         if (lightmaprgba)
1566                                 glTexImage2D(GL_TEXTURE_2D, 0, 3, BLOCK_WIDTH, BLOCK_HEIGHT, 0, GL_RGBA, GL_UNSIGNED_BYTE, lightmaps[i]);
1567                         else
1568                                 glTexImage2D(GL_TEXTURE_2D, 0, 3, BLOCK_WIDTH, BLOCK_HEIGHT, 0, GL_RGB, GL_UNSIGNED_BYTE, lightmaps[i]);
1569                 }
1570                 if (gl_mtexable)
1571                         qglSelectTexture(gl_mtex_enum+0);
1572         }
1573 }
1574