tools/quake3/q3map2/light.c

   1 /* -------------------------------------------------------------------------------
   2
   3 Copyright (C) 1999-2007 id Software, Inc. and contributors.
   4 For a list of contributors, see the accompanying CONTRIBUTORS file.
   5
   6 This file is part of GtkRadiant.
   7
   8 GtkRadiant is free software; you can redistribute it and/or modify
   9 it under the terms of the GNU General Public License as published by
  10 the Free Software Foundation; either version 2 of the License, or
  11 (at your option) any later version.
  12
  13 GtkRadiant is distributed in the hope that it will be useful,
  14 but WITHOUT ANY WARRANTY; without even the implied warranty of
  15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16 GNU General Public License for more details.
  17
  18 You should have received a copy of the GNU General Public License
  19 along with GtkRadiant; if not, write to the Free Software
  20 Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
  21
  22 ----------------------------------------------------------------------------------
  23
  24 This code has been altered significantly from its original form, to support
  25 several games based on the Quake III Arena engine, in the form of "Q3Map2."
  26
  27 ------------------------------------------------------------------------------- */
  28
  29
  30
  31 /* marker */
  32 #define LIGHT_C
  33
  34
  35
  36 /* dependencies */
  37 #include "q3map2.h"
  38
  39
  40
  41 /*
  42 CreateSunLight() - ydnar
  43 this creates a sun light
  44 */
  45
  46 static void CreateSunLight( sun_t *sun )
  47 {
  48         int                     i;
  49         float           photons, d, angle, elevation, da, de;
  50         vec3_t          direction;
  51         light_t         *light;
  52
  53
  54         /* dummy check */
  55         if( sun == NULL )
  56                 return;
  57
  58         /* fixup */
  59         if( sun->numSamples < 1 )
  60                 sun->numSamples = 1;
  61
  62         /* set photons */
  63         photons = sun->photons / sun->numSamples;
  64
  65         /* create the right number of suns */
  66         for( i = 0; i < sun->numSamples; i++ )
  67         {
  68                 /* calculate sun direction */
  69                 if( i == 0 )
  70                         VectorCopy( sun->direction, direction );
  71                 else
  72                 {
  73                         /*
  74                                 sun->direction[ 0 ] = cos( angle ) * cos( elevation );
  75                                 sun->direction[ 1 ] = sin( angle ) * cos( elevation );
  76                                 sun->direction[ 2 ] = sin( elevation );
  77
  78                                 xz_dist   = sqrt( x*x + z*z )
  79                                 latitude  = atan2( xz_dist, y ) * RADIANS
  80                                 longitude = atan2( x,       z ) * RADIANS
  81                         */
  82
  83                         d = sqrt( sun->direction[ 0 ] * sun->direction[ 0 ] + sun->direction[ 1 ] * sun->direction[ 1 ] );
  84                         angle = atan2( sun->direction[ 1 ], sun->direction[ 0 ] );
  85                         elevation = atan2( sun->direction[ 2 ], d );
  86
  87                         /* jitter the angles (loop to keep random sample within sun->deviance steridians) */
  88                         do
  89                         {
  90                                 da = (Random() * 2.0f - 1.0f) * sun->deviance;
  91                                 de = (Random() * 2.0f - 1.0f) * sun->deviance;
  92                         }
  93                         while( (da * da + de * de) > (sun->deviance * sun->deviance) );
  94                         angle += da;
  95                         elevation += de;
  96
  97                         /* debug code */
  98                         //%     Sys_Printf( "%d: Angle: %3.4f Elevation: %3.3f\n", sun->numSamples, (angle / Q_PI * 180.0f), (elevation / Q_PI * 180.0f) );
  99
 100                         /* create new vector */
 101                         direction[ 0 ] = cos( angle ) * cos( elevation );
 102                         direction[ 1 ] = sin( angle ) * cos( elevation );
 103                         direction[ 2 ] = sin( elevation );
 104                 }
 105
 106                 /* create a light */
 107                 numSunLights++;
 108                 light = safe_malloc( sizeof( *light ) );
 109                 memset( light, 0, sizeof( *light ) );
 110                 light->next = lights;
 111                 lights = light;
 112
 113                 /* initialize the light */
 114                 light->flags = LIGHT_SUN_DEFAULT;
 115                 light->type = EMIT_SUN;
 116                 light->fade = 1.0f;
 117                 light->falloffTolerance = falloffTolerance;
 118                 light->filterRadius = sun->filterRadius / sun->numSamples;
 119                 light->style = noStyles ? LS_NORMAL : sun->style;
 120
 121                 /* set the light's position out to infinity */
 122                 VectorMA( vec3_origin, (MAX_WORLD_COORD * 8.0f), direction, light->origin );    /* MAX_WORLD_COORD * 2.0f */
 123
 124                 /* set the facing to be the inverse of the sun direction */
 125                 VectorScale( direction, -1.0, light->normal );
 126                 light->dist = DotProduct( light->origin, light->normal );
 127
 128                 /* set color and photons */
 129                 VectorCopy( sun->color, light->color );
 130                 light->photons = photons * skyScale;
 131         }
 132
 133         /* another sun? */
 134         if( sun->next != NULL )
 135                 CreateSunLight( sun->next );
 136 }
 137
 138
 139
 140 /*
 141 CreateSkyLights() - ydnar
 142 simulates sky light with multiple suns
 143 */
 144
 145 static void CreateSkyLights( vec3_t color, float value, int iterations, float filterRadius, int style )
 146 {
 147         int                     i, j, numSuns;
 148         int                     angleSteps, elevationSteps;
 149         float           angle, elevation;
 150         float           angleStep, elevationStep;
 151         float           step, start;
 152         sun_t           sun;
 153
 154
 155         /* dummy check */
 156         if( value <= 0.0f || iterations < 2 )
 157                 return;
 158
 159         /* calculate some stuff */
 160         step = 2.0f / (iterations - 1);
 161         start = -1.0f;
 162
 163         /* basic sun setup */
 164         VectorCopy( color, sun.color );
 165         sun.deviance = 0.0f;
 166         sun.filterRadius = filterRadius;
 167         sun.numSamples = 1;
 168         sun.style = noStyles ? LS_NORMAL : style;
 169         sun.next = NULL;
 170
 171         /* setup */
 172         elevationSteps = iterations - 1;
 173         angleSteps = elevationSteps * 4;
 174         angle = 0.0f;
 175         elevationStep = DEG2RAD( 90.0f / iterations );  /* skip elevation 0 */
 176         angleStep = DEG2RAD( 360.0f / angleSteps );
 177
 178         /* calc individual sun brightness */
 179         numSuns = angleSteps * elevationSteps + 1;
 180         sun.photons = value / numSuns;
 181
 182         /* iterate elevation */
 183         elevation = elevationStep * 0.5f;
 184         angle = 0.0f;
 185         for( i = 0, elevation = elevationStep * 0.5f; i < elevationSteps; i++ )
 186         {
 187                 /* iterate angle */
 188                 for( j = 0; j < angleSteps; j++ )
 189                 {
 190                         /* create sun */
 191                         sun.direction[ 0 ] = cos( angle ) * cos( elevation );
 192                         sun.direction[ 1 ] = sin( angle ) * cos( elevation );
 193                         sun.direction[ 2 ] = sin( elevation );
 194                         CreateSunLight( &sun );
 195
 196                         /* move */
 197                         angle += angleStep;
 198                 }
 199
 200                 /* move */
 201                 elevation += elevationStep;
 202                 angle += angleStep / elevationSteps;
 203         }
 204
 205         /* create vertical sun */
 206         VectorSet( sun.direction, 0.0f, 0.0f, 1.0f );
 207         CreateSunLight( &sun );
 208
 209         /* short circuit */
 210         return;
 211 }
 212
 213
 214
 215 /*
 216 CreateEntityLights()
 217 creates lights from light entities
 218 */
 219
 220 void CreateEntityLights( void )
 221 {
 222         int                             i, j;
 223         light_t                 *light, *light2;
 224         entity_t                *e, *e2;
 225         const char              *name;
 226         const char              *target;
 227         vec3_t                  dest;
 228         const char              *_color;
 229         float                   intensity, scale, deviance, filterRadius;
 230         int                             spawnflags, flags, numSamples;
 231         qboolean                junior;
 232
 233
 234         /* go throught entity list and find lights */
 235         for( i = 0; i < numEntities; i++ )
 236         {
 237                 /* get entity */
 238                 e = &entities[ i ];
 239                 name = ValueForKey( e, "classname" );
 240
 241                 /* ydnar: check for lightJunior */
 242                 if( Q_strncasecmp( name, "lightJunior", 11 ) == 0 )
 243                         junior = qtrue;
 244                 else if( Q_strncasecmp( name, "light", 5 ) == 0 )
 245                         junior = qfalse;
 246                 else
 247                         continue;
 248
 249                 /* lights with target names (and therefore styles) are only parsed from BSP */
 250                 target = ValueForKey( e, "targetname" );
 251                 if( target[ 0 ] != '\0' && i >= numBSPEntities )
 252                         continue;
 253
 254                 /* create a light */
 255                 numPointLights++;
 256                 light = safe_malloc( sizeof( *light ) );
 257                 memset( light, 0, sizeof( *light ) );
 258                 light->next = lights;
 259                 lights = light;
 260
 261                 /* handle spawnflags */
 262                 spawnflags = IntForKey( e, "spawnflags" );
 263
 264                 /* ydnar: quake 3+ light behavior */
 265                 if( wolfLight == qfalse )
 266                 {
 267                         /* set default flags */
 268                         flags = LIGHT_Q3A_DEFAULT;
 269
 270                         /* linear attenuation? */
 271                         if( spawnflags & 1 )
 272                         {
 273                                 flags |= LIGHT_ATTEN_LINEAR;
 274                                 flags &= ~LIGHT_ATTEN_ANGLE;
 275                         }
 276
 277                         /* no angle attenuate? */
 278                         if( spawnflags & 2 )
 279                                 flags &= ~LIGHT_ATTEN_ANGLE;
 280                 }
 281
 282                 /* ydnar: wolf light behavior */
 283                 else
 284                 {
 285                         /* set default flags */
 286                         flags = LIGHT_WOLF_DEFAULT;
 287
 288                         /* inverse distance squared attenuation? */
 289                         if( spawnflags & 1 )
 290                         {
 291                                 flags &= ~LIGHT_ATTEN_LINEAR;
 292                                 flags |= LIGHT_ATTEN_ANGLE;
 293                         }
 294
 295                         /* angle attenuate? */
 296                         if( spawnflags & 2 )
 297                                 flags |= LIGHT_ATTEN_ANGLE;
 298                 }
 299
 300                 /* other flags (borrowed from wolf) */
 301
 302                 /* wolf dark light? */
 303                 if( (spawnflags & 4) || (spawnflags & 8) )
 304                         flags |= LIGHT_DARK;
 305
 306                 /* nogrid? */
 307                 if( spawnflags & 16 )
 308                         flags &= ~LIGHT_GRID;
 309
 310                 /* junior? */
 311                 if( junior )
 312                 {
 313                         flags |= LIGHT_GRID;
 314                         flags &= ~LIGHT_SURFACES;
 315                 }
 316
 317                 /* vortex: unnormalized? */
 318                 if (spawnflags & 32)
 319                         flags |= LIGHT_UNNORMALIZED;
 320
 321                 /* vortex: distance atten? */
 322                 if (spawnflags & 64)
 323                         flags |= LIGHT_ATTEN_DISTANCE;
 324
 325                 /* store the flags */
 326                 light->flags = flags;
 327
 328                 /* ydnar: set fade key (from wolf) */
 329                 light->fade = 1.0f;
 330                 if( light->flags & LIGHT_ATTEN_LINEAR )
 331                 {
 332                         light->fade = FloatForKey( e, "fade" );
 333                         if( light->fade == 0.0f )
 334                                 light->fade = 1.0f;
 335                 }
 336
 337                 /* ydnar: set angle scaling (from vlight) */
 338                 light->angleScale = FloatForKey( e, "_anglescale" );
 339                 if( light->angleScale != 0.0f )
 340                         light->flags |= LIGHT_ATTEN_ANGLE;
 341
 342                 /* set origin */
 343                 GetVectorForKey( e, "origin", light->origin);
 344                 light->style = IntForKey( e, "_style" );
 345                 if( light->style == LS_NORMAL )
 346                         light->style = IntForKey( e, "style" );
 347                 if( light->style < LS_NORMAL || light->style >= LS_NONE )
 348                         Error( "Invalid lightstyle (%d) on entity %d", light->style, i );
 349
 350                 if( light->style != LS_NORMAL ) {
 351                         Sys_FPrintf (SYS_WRN, "WARNING: Styled light found targeting %s\n **", target );
 352                 }
 353
 354                 /* set light intensity */
 355                 intensity = FloatForKey( e, "_light" );
 356                 if( intensity == 0.0f )
 357                         intensity = FloatForKey( e, "light" );
 358                 if( intensity == 0.0f)
 359                         intensity = 300.0f;
 360
 361                 /* ydnar: set light scale (sof2) */
 362                 scale = FloatForKey( e, "scale" );
 363                 if( scale == 0.0f )
 364                         scale = 1.0f;
 365                 intensity *= scale;
 366
 367                 /* ydnar: get deviance and samples */
 368                 deviance = FloatForKey( e, "_deviance" );
 369                 if( deviance == 0.0f )
 370                         deviance = FloatForKey( e, "_deviation" );
 371                 if( deviance == 0.0f )
 372                         deviance = FloatForKey( e, "_jitter" );
 373                 numSamples = IntForKey( e, "_samples" );
 374                 if( deviance < 0.0f || numSamples < 1 )
 375                 {
 376                         deviance = 0.0f;
 377                         numSamples = 1;
 378                 }
 379                 intensity /= numSamples;
 380
 381                 /* ydnar: get filter radius */
 382                 filterRadius = FloatForKey( e, "_filterradius" );
 383                 if( filterRadius == 0.0f )
 384                         filterRadius = FloatForKey( e, "_filteradius" );
 385                 if( filterRadius == 0.0f )
 386                         filterRadius = FloatForKey( e, "_filter" );
 387                 if( filterRadius < 0.0f )
 388                         filterRadius = 0.0f;
 389                 light->filterRadius = filterRadius;
 390
 391                 /* set light color */
 392                 _color = ValueForKey( e, "_color" );
 393                 if( _color && _color[ 0 ] )
 394                 {
 395                         sscanf( _color, "%f %f %f", &light->color[ 0 ], &light->color[ 1 ], &light->color[ 2 ] );
 396                         if (!(light->flags & LIGHT_UNNORMALIZED))
 397                         {
 398                                 ColorNormalize( light->color, light->color );
 399                         }
 400                 }
 401                 else
 402                         light->color[ 0 ] = light->color[ 1 ] = light->color[ 2 ] = 1.0f;
 403
 404                 intensity = intensity * pointScale;
 405                 light->photons = intensity;
 406
 407                 light->type = EMIT_POINT;
 408
 409                 /* set falloff threshold */
 410                 light->falloffTolerance = falloffTolerance / numSamples;
 411
 412                 /* lights with a target will be spotlights */
 413                 target = ValueForKey( e, "target" );
 414                 if( target[ 0 ] )
 415                 {
 416                         float           radius;
 417                         float           dist;
 418                         sun_t           sun;
 419                         const char      *_sun;
 420
 421
 422                         /* get target */
 423                         e2 = FindTargetEntity( target );
 424                         if( e2 == NULL )
 425                         {
 426                                 Sys_Printf( "WARNING: light at (%i %i %i) has missing target\n",
 427                                         (int) light->origin[ 0 ], (int) light->origin[ 1 ], (int) light->origin[ 2 ] );
 428                         }
 429                         else
 430                         {
 431                                 /* not a point light */
 432                                 numPointLights--;
 433                                 numSpotLights++;
 434
 435                                 /* make a spotlight */
 436                                 GetVectorForKey( e2, "origin", dest );
 437                                 VectorSubtract( dest, light->origin, light->normal );
 438                                 dist = VectorNormalize( light->normal, light->normal );
 439                                 radius = FloatForKey( e, "radius" );
 440                                 if( !radius )
 441                                         radius = 64;
 442                                 if( !dist )
 443                                         dist = 64;
 444                                 light->radiusByDist = (radius + 16) / dist;
 445                                 light->type = EMIT_SPOT;
 446
 447                                 /* ydnar: wolf mods: spotlights always use nonlinear + angle attenuation */
 448                                 light->flags &= ~LIGHT_ATTEN_LINEAR;
 449                                 light->flags |= LIGHT_ATTEN_ANGLE;
 450                                 light->fade = 1.0f;
 451
 452                                 /* ydnar: is this a sun? */
 453                                 _sun = ValueForKey( e, "_sun" );
 454                                 if( _sun[ 0 ] == '1' )
 455                                 {
 456                                         /* not a spot light */
 457                                         numSpotLights--;
 458
 459                                         /* unlink this light */
 460                                         lights = light->next;
 461
 462                                         /* make a sun */
 463                                         VectorScale( light->normal, -1.0f, sun.direction );
 464                                         VectorCopy( light->color, sun.color );
 465                                         sun.photons = (intensity / pointScale);
 466                                         sun.deviance = deviance / 180.0f * Q_PI;
 467                                         sun.numSamples = numSamples;
 468                                         sun.style = noStyles ? LS_NORMAL : light->style;
 469                                         sun.next = NULL;
 470
 471                                         /* make a sun light */
 472                                         CreateSunLight( &sun );
 473
 474                                         /* free original light */
 475                                         free( light );
 476                                         light = NULL;
 477
 478                                         /* skip the rest of this love story */
 479                                         continue;
 480                                 }
 481                         }
 482                 }
 483
 484                 /* jitter the light */
 485                 for( j = 1; j < numSamples; j++ )
 486                 {
 487                         /* create a light */
 488                         light2 = safe_malloc( sizeof( *light ) );
 489                         memcpy( light2, light, sizeof( *light ) );
 490                         light2->next = lights;
 491                         lights = light2;
 492
 493                         /* add to counts */
 494                         if( light->type == EMIT_SPOT )
 495                                 numSpotLights++;
 496                         else
 497                                 numPointLights++;
 498
 499                         /* jitter it */
 500                         light2->origin[ 0 ] = light->origin[ 0 ] + (Random() * 2.0f - 1.0f) * deviance;
 501                         light2->origin[ 1 ] = light->origin[ 1 ] + (Random() * 2.0f - 1.0f) * deviance;
 502                         light2->origin[ 2 ] = light->origin[ 2 ] + (Random() * 2.0f - 1.0f) * deviance;
 503                 }
 504         }
 505 }
 506
 507
 508
 509 /*
 510 CreateSurfaceLights() - ydnar
 511 this hijacks the radiosity code to generate surface lights for first pass
 512 */
 513
 514 #define APPROX_BOUNCE   1.0f
 515
 516 void CreateSurfaceLights( void )
 517 {
 518         int                                     i;
 519         bspDrawSurface_t        *ds;
 520         surfaceInfo_t           *info;
 521         shaderInfo_t            *si;
 522         light_t                         *light;
 523         float                           subdivide;
 524         vec3_t                          origin;
 525         clipWork_t                      cw;
 526         const char                      *nss;
 527
 528
 529         /* get sun shader supressor */
 530         nss = ValueForKey( &entities[ 0 ], "_noshadersun" );
 531
 532         /* walk the list of surfaces */
 533         for( i = 0; i < numBSPDrawSurfaces; i++ )
 534         {
 535                 /* get surface and other bits */
 536                 ds = &bspDrawSurfaces[ i ];
 537                 info = &surfaceInfos[ i ];
 538                 si = info->si;
 539
 540                 /* sunlight? */
 541                 if( si->sun != NULL && nss[ 0 ] != '1' )
 542                 {
 543                         Sys_FPrintf( SYS_VRB, "Sun: %s\n", si->shader );
 544                         CreateSunLight( si->sun );
 545                         si->sun = NULL; /* FIXME: leak! */
 546                 }
 547
 548                 /* sky light? */
 549                 if( si->skyLightValue > 0.0f )
 550                 {
 551                         Sys_FPrintf( SYS_VRB, "Sky: %s\n", si->shader );
 552                         CreateSkyLights( si->color, si->skyLightValue, si->skyLightIterations, si->lightFilterRadius, si->lightStyle );
 553                         si->skyLightValue = 0.0f;       /* FIXME: hack! */
 554                 }
 555
 556                 /* try to early out */
 557                 if( si->value <= 0 )
 558                         continue;
 559
 560                 /* autosprite shaders become point lights */
 561                 if( si->autosprite )
 562                 {
 563                         /* create an average xyz */
 564                         VectorAdd( info->mins, info->maxs, origin );
 565                         VectorScale( origin, 0.5f, origin );
 566
 567                         /* create a light */
 568                         light = safe_malloc( sizeof( *light ) );
 569                         memset( light, 0, sizeof( *light ) );
 570                         light->next = lights;
 571                         lights = light;
 572
 573                         /* set it up */
 574                         light->flags = LIGHT_Q3A_DEFAULT;
 575                         light->type = EMIT_POINT;
 576                         light->photons = si->value * pointScale;
 577                         light->fade = 1.0f;
 578                         light->si = si;
 579                         VectorCopy( origin, light->origin );
 580                         VectorCopy( si->color, light->color );
 581                         light->falloffTolerance = falloffTolerance;
 582                         light->style = si->lightStyle;
 583
 584                         /* add to point light count and continue */
 585                         numPointLights++;
 586                         continue;
 587                 }
 588
 589                 /* get subdivision amount */
 590                 if( si->lightSubdivide > 0 )
 591                         subdivide = si->lightSubdivide;
 592                 else
 593                         subdivide = defaultLightSubdivide;
 594
 595                 /* switch on type */
 596                 switch( ds->surfaceType )
 597                 {
 598                         case MST_PLANAR:
 599                         case MST_TRIANGLE_SOUP:
 600                                 RadLightForTriangles( i, 0, info->lm, si, APPROX_BOUNCE, subdivide, &cw );
 601                                 break;
 602
 603                         case MST_PATCH:
 604                                 RadLightForPatch( i, 0, info->lm, si, APPROX_BOUNCE, subdivide, &cw );
 605                                 break;
 606
 607                         default:
 608                                 break;
 609                 }
 610         }
 611 }
 612
 613
 614
 615 /*
 616 SetEntityOrigins()
 617 find the offset values for inline models
 618 */
 619
 620 void SetEntityOrigins( void )
 621 {
 622         int                                     i, j, k, f;
 623         entity_t                        *e;
 624         vec3_t                          origin;
 625         const char                      *key;
 626         int                                     modelnum;
 627         bspModel_t                      *dm;
 628         bspDrawSurface_t        *ds;
 629
 630
 631         /* ydnar: copy drawverts into private storage for nefarious purposes */
 632         yDrawVerts = safe_malloc( numBSPDrawVerts * sizeof( bspDrawVert_t ) );
 633         memcpy( yDrawVerts, bspDrawVerts, numBSPDrawVerts * sizeof( bspDrawVert_t ) );
 634
 635         /* set the entity origins */
 636         for( i = 0; i < numEntities; i++ )
 637         {
 638                 /* get entity and model */
 639                 e = &entities[ i ];
 640                 key = ValueForKey( e, "model" );
 641                 if( key[ 0 ] != '*' )
 642                         continue;
 643                 modelnum = atoi( key + 1 );
 644                 dm = &bspModels[ modelnum ];
 645
 646                 /* get entity origin */
 647                 key = ValueForKey( e, "origin" );
 648                 if( key[ 0 ] == '\0' )
 649                         continue;
 650                 GetVectorForKey( e, "origin", origin );
 651
 652                 /* set origin for all surfaces for this model */
 653                 for( j = 0; j < dm->numBSPSurfaces; j++ )
 654                 {
 655                         /* get drawsurf */
 656                         ds = &bspDrawSurfaces[ dm->firstBSPSurface + j ];
 657
 658                         /* set its verts */
 659                         for( k = 0; k < ds->numVerts; k++ )
 660                         {
 661                                 f = ds->firstVert + k;
 662                                 VectorAdd( origin, bspDrawVerts[ f ].xyz, yDrawVerts[ f ].xyz );
 663                         }
 664                 }
 665         }
 666 }
 667
 668
 669
 670 /*
 671 PointToPolygonFormFactor()
 672 calculates the area over a point/normal hemisphere a winding covers
 673 ydnar: fixme: there has to be a faster way to calculate this
 674 without the expensive per-vert sqrts and transcendental functions
 675 ydnar 2002-09-30: added -faster switch because only 19% deviance > 10%
 676 between this and the approximation
 677 */
 678
 679 #define ONE_OVER_2PI    0.159154942f    //% (1.0f / (2.0f * 3.141592657f))
 680
 681 float PointToPolygonFormFactor( const vec3_t point, const vec3_t normal, const winding_t *w )
 682 {
 683         vec3_t          triVector, triNormal;
 684         int                     i, j;
 685         vec3_t          dirs[ MAX_POINTS_ON_WINDING ];
 686         float           total;
 687         float           dot, angle, facing;
 688
 689
 690         /* this is expensive */
 691         for( i = 0; i < w->numpoints; i++ )
 692         {
 693                 VectorSubtract( w->p[ i ], point, dirs[ i ] );
 694                 VectorNormalize( dirs[ i ], dirs[ i ] );
 695         }
 696
 697         /* duplicate first vertex to avoid mod operation */
 698         VectorCopy( dirs[ 0 ], dirs[ i ] );
 699
 700         /* calculcate relative area */
 701         total = 0.0f;
 702         for( i = 0; i < w->numpoints; i++ )
 703         {
 704                 /* get a triangle */
 705                 j = i + 1;
 706                 dot = DotProduct( dirs[ i ], dirs[ j ] );
 707
 708                 /* roundoff can cause slight creep, which gives an IND from acos */
 709                 if( dot > 1.0f )
 710                         dot = 1.0f;
 711                 else if( dot < -1.0f )
 712                         dot = -1.0f;
 713
 714                 /* get the angle */
 715                 angle = acos( dot );
 716
 717                 CrossProduct( dirs[ i ], dirs[ j ], triVector );
 718                 if( VectorNormalize( triVector, triNormal ) < 0.0001f )
 719                         continue;
 720
 721                 facing = DotProduct( normal, triNormal );
 722                 total += facing * angle;
 723
 724                 /* ydnar: this was throwing too many errors with radiosity + crappy maps. ignoring it. */
 725                 if( total > 6.3f || total < -6.3f )
 726                         return 0.0f;
 727         }
 728
 729         /* now in the range of 0 to 1 over the entire incoming hemisphere */
 730         //%     total /= (2.0f * 3.141592657f);
 731         total *= ONE_OVER_2PI;
 732         return total;
 733 }
 734
 735
 736
 737 /*
 738 LightContributionTosample()
 739 determines the amount of light reaching a sample (luxel or vertex) from a given light
 740 */
 741
 742 int LightContributionToSample( trace_t *trace )
 743 {
 744         light_t                 *light;
 745         float                   angle;
 746         float                   add;
 747         float                   dist;
 748
 749
 750         /* get light */
 751         light = trace->light;
 752
 753         /* clear color */
 754         VectorClear( trace->color );
 755         VectorClear( trace->colorNoShadow );
 756
 757         /* ydnar: early out */
 758         if( !(light->flags & LIGHT_SURFACES) || light->envelope <= 0.0f )
 759                 return 0;
 760
 761         /* do some culling checks */
 762         if( light->type != EMIT_SUN )
 763         {
 764                 /* MrE: if the light is behind the surface */
 765                 if( trace->twoSided == qfalse )
 766                         if( DotProduct( light->origin, trace->normal ) - DotProduct( trace->origin, trace->normal ) < 0.0f )
 767                                 return 0;
 768
 769                 /* ydnar: test pvs */
 770                 if( !ClusterVisible( trace->cluster, light->cluster ) )
 771                         return 0;
 772         }
 773
 774         /* exact point to polygon form factor */
 775         if( light->type == EMIT_AREA )
 776         {
 777                 float           factor;
 778                 float           d;
 779                 vec3_t          pushedOrigin;
 780
 781                 /* project sample point into light plane */
 782                 d = DotProduct( trace->origin, light->normal ) - light->dist;
 783                 if( d < 3.0f )
 784                 {
 785                         /* sample point behind plane? */
 786                         if( !(light->flags & LIGHT_TWOSIDED) && d < -1.0f )
 787                                 return 0;
 788
 789                         /* sample plane coincident? */
 790                         if( d > -3.0f && DotProduct( trace->normal, light->normal ) > 0.9f )
 791                                 return 0;
 792                 }
 793
 794                 /* nudge the point so that it is clearly forward of the light */
 795                 /* so that surfaces meeting a light emiter don't get black edges */
 796                 if( d > -8.0f && d < 8.0f )
 797                         VectorMA( trace->origin, (8.0f - d), light->normal, pushedOrigin );
 798                 else
 799                         VectorCopy( trace->origin, pushedOrigin );
 800
 801                 /* get direction and distance */
 802                 VectorCopy( light->origin, trace->end );
 803                 dist = SetupTrace( trace );
 804                 if( dist >= light->envelope )
 805                         return 0;
 806
 807                 /* ptpff approximation */
 808                 if( faster )
 809                 {
 810                         /* angle attenuation */
 811                         angle = DotProduct( trace->normal, trace->direction );
 812
 813                         /* twosided lighting */
 814                         if( trace->twoSided )
 815                                 angle = fabs( angle );
 816
 817                         /* attenuate */
 818                         angle *= -DotProduct( light->normal, trace->direction );
 819                         if( angle == 0.0f )
 820                                 return 0;
 821                         else if( angle < 0.0f &&
 822                                 (trace->twoSided || (light->flags & LIGHT_TWOSIDED)) )
 823                                 angle = -angle;
 824                         add = light->photons / (dist * dist) * angle;
 825                 }
 826                 else
 827                 {
 828                         /* calculate the contribution */
 829                         factor = PointToPolygonFormFactor( pushedOrigin, trace->normal, light->w );
 830                         if( factor == 0.0f )
 831                                 return 0;
 832                         else if( factor < 0.0f )
 833                         {
 834                                 /* twosided lighting */
 835                                 if( trace->twoSided || (light->flags & LIGHT_TWOSIDED) )
 836                                 {
 837                                         factor = -factor;
 838
 839                                         /* push light origin to other side of the plane */
 840                                         VectorMA( light->origin, -2.0f, light->normal, trace->end );
 841                                         dist = SetupTrace( trace );
 842                                         if( dist >= light->envelope )
 843                                                 return 0;
 844                                 }
 845                                 else
 846                                         return 0;
 847                         }
 848
 849                         /* ydnar: moved to here */
 850                         add = factor * light->add;
 851                 }
 852         }
 853
 854         /* point/spot lights */
 855         else if( light->type == EMIT_POINT || light->type == EMIT_SPOT )
 856         {
 857                 /* get direction and distance */
 858                 VectorCopy( light->origin, trace->end );
 859                 dist = SetupTrace( trace );
 860                 if( dist >= light->envelope )
 861                         return 0;
 862
 863                 /* clamp the distance to prevent super hot spots */
 864                 if( dist < 16.0f )
 865                         dist = 16.0f;
 866
 867                 /* angle attenuation */
 868                 angle = (light->flags & LIGHT_ATTEN_ANGLE) ? DotProduct( trace->normal, trace->direction ) : 1.0f;
 869                 if( light->angleScale != 0.0f )
 870                 {
 871                         angle /= light->angleScale;
 872                         if( angle > 1.0f )
 873                                 angle = 1.0f;
 874                 }
 875
 876                 /* twosided lighting */
 877                 if( trace->twoSided )
 878                         angle = fabs( angle );
 879
 880                 /* attenuate */
 881                 if( light->flags & LIGHT_ATTEN_LINEAR )
 882                 {
 883                         add = angle * light->photons * linearScale - (dist * light->fade);
 884                         if( add < 0.0f )
 885                                 add = 0.0f;
 886                 }
 887                 else
 888                         add = light->photons / (dist * dist) * angle;
 889
 890                 /* handle spotlights */
 891                 if( light->type == EMIT_SPOT )
 892                 {
 893                         float   distByNormal, radiusAtDist, sampleRadius;
 894                         vec3_t  pointAtDist, distToSample;
 895
 896                         /* do cone calculation */
 897                         distByNormal = -DotProduct( trace->displacement, light->normal );
 898                         if( distByNormal < 0.0f )
 899                                 return 0;
 900                         VectorMA( light->origin, distByNormal, light->normal, pointAtDist );
 901                         radiusAtDist = light->radiusByDist * distByNormal;
 902                         VectorSubtract( trace->origin, pointAtDist, distToSample );
 903                         sampleRadius = VectorLength( distToSample );
 904
 905                         /* outside the cone */
 906                         if( sampleRadius >= radiusAtDist )
 907                                 return 0;
 908
 909                         /* attenuate */
 910                         if( sampleRadius > (radiusAtDist - 32.0f) )
 911                                 add *= ((radiusAtDist - sampleRadius) / 32.0f);
 912                 }
 913         }
 914
 915         /* ydnar: sunlight */
 916         else if( light->type == EMIT_SUN )
 917         {
 918                 /* get origin and direction */
 919                 VectorAdd( trace->origin, light->origin, trace->end );
 920                 dist = SetupTrace( trace );
 921
 922                 /* angle attenuation */
 923                 angle = (light->flags & LIGHT_ATTEN_ANGLE)
 924                         ? DotProduct( trace->normal, trace->direction )
 925                         : 1.0f;
 926
 927                 /* twosided lighting */
 928                 if( trace->twoSided )
 929                         angle = fabs( angle );
 930
 931                 /* attenuate */
 932                 add = light->photons * angle;
 933                 if( add <= 0.0f )
 934                         return 0;
 935
 936                 /* VorteX: set noShadow color */
 937                 VectorScale(light->color, add, trace->colorNoShadow);
 938
 939                 /* setup trace */
 940                 trace->testAll = qtrue;
 941                 VectorScale( light->color, add, trace->color );
 942
 943                 /* trace to point */
 944                 if( trace->testOcclusion && !trace->forceSunlight )
 945                 {
 946                         /* trace */
 947                         TraceLine( trace );
 948                         if( !(trace->compileFlags & C_SKY) || trace->opaque )
 949                         {
 950                                 VectorClear( trace->color );
 951                                 return -1;
 952                         }
 953                 }
 954
 955                 /* return to sender */
 956                 return 1;
 957         }
 958
 959         /* VorteX: set noShadow color */
 960         VectorScale(light->color, add, trace->colorNoShadow);
 961
 962         /* ydnar: changed to a variable number */
 963         if( add <= 0.0f || (add <= light->falloffTolerance && (light->flags & LIGHT_FAST_ACTUAL)) )
 964                 return 0;
 965
 966         /* setup trace */
 967         trace->testAll = qfalse;
 968         VectorScale( light->color, add, trace->color );
 969
 970         /* raytrace */
 971         TraceLine( trace );
 972         if( trace->passSolid || trace->opaque )
 973         {
 974                 VectorClear( trace->color );
 975                 return -1;
 976         }
 977
 978         /* return to sender */
 979         return 1;
 980 }
 981
 982
 983
 984 /*
 985 LightingAtSample()
 986 determines the amount of light reaching a sample (luxel or vertex)
 987 */
 988
 989 void LightingAtSample( trace_t *trace, byte styles[ MAX_LIGHTMAPS ], vec3_t colors[ MAX_LIGHTMAPS ] )
 990 {
 991         int                             i, lightmapNum;
 992
 993
 994         /* clear colors */
 995         for( lightmapNum = 0; lightmapNum < MAX_LIGHTMAPS; lightmapNum++ )
 996                 VectorClear( colors[ lightmapNum ] );
 997
 998         /* ydnar: normalmap */
 999         if( normalmap )
1000         {
1001                 colors[ 0 ][ 0 ] = (trace->normal[ 0 ] + 1.0f) * 127.5f;
1002                 colors[ 0 ][ 1 ] = (trace->normal[ 1 ] + 1.0f) * 127.5f;
1003                 colors[ 0 ][ 2 ] = (trace->normal[ 2 ] + 1.0f) * 127.5f;
1004                 return;
1005         }
1006
1007         /* ydnar: don't bounce ambient all the time */
1008         if( !bouncing )
1009                 VectorCopy( ambientColor, colors[ 0 ] );
1010
1011         /* ydnar: trace to all the list of lights pre-stored in tw */
1012         for( i = 0; i < trace->numLights && trace->lights[ i ] != NULL; i++ )
1013         {
1014                 /* set light */
1015                 trace->light = trace->lights[ i ];
1016
1017                 /* style check */
1018                 for( lightmapNum = 0; lightmapNum < MAX_LIGHTMAPS; lightmapNum++ )
1019                 {
1020                         if( styles[ lightmapNum ] == trace->light->style ||
1021                                 styles[ lightmapNum ] == LS_NONE )
1022                                 break;
1023                 }
1024
1025                 /* max of MAX_LIGHTMAPS (4) styles allowed to hit a sample */
1026                 if( lightmapNum >= MAX_LIGHTMAPS )
1027                         continue;
1028
1029                 /* sample light */
1030                 LightContributionToSample( trace );
1031                 if( trace->color[ 0 ] == 0.0f && trace->color[ 1 ] == 0.0f && trace->color[ 2 ] == 0.0f )
1032                         continue;
1033
1034                 /* handle negative light */
1035                 if( trace->light->flags & LIGHT_NEGATIVE )
1036                         VectorScale( trace->color, -1.0f, trace->color );
1037
1038                 /* set style */
1039                 styles[ lightmapNum ] = trace->light->style;
1040
1041                 /* add it */
1042                 VectorAdd( colors[ lightmapNum ], trace->color, colors[ lightmapNum ] );
1043
1044                 /* cheap mode */
1045                 if( cheap &&
1046                         colors[ 0 ][ 0 ] >= 255.0f &&
1047                         colors[ 0 ][ 1 ] >= 255.0f &&
1048                         colors[ 0 ][ 2 ] >= 255.0f )
1049                         break;
1050         }
1051 }
1052
1053
1054
1055 /*
1056 LightContributionToPoint()
1057 for a given light, how much light/color reaches a given point in space (with no facing)
1058 note: this is similar to LightContributionToSample() but optimized for omnidirectional sampling
1059 */
1060
1061 int LightContributionToPoint( trace_t *trace )
1062 {
1063         light_t         *light;
1064         float           add, dist;
1065
1066
1067         /* get light */
1068         light = trace->light;
1069
1070         /* clear color */
1071         VectorClear( trace->color );
1072
1073         /* ydnar: early out */
1074         if( !(light->flags & LIGHT_GRID) || light->envelope <= 0.0f )
1075                 return qfalse;
1076
1077         /* is this a sun? */
1078         if( light->type != EMIT_SUN )
1079         {
1080                 /* sun only? */
1081                 if( sunOnly )
1082                         return qfalse;
1083
1084                 /* test pvs */
1085                 if( !ClusterVisible( trace->cluster, light->cluster ) )
1086                         return qfalse;
1087         }
1088
1089         /* ydnar: check origin against light's pvs envelope */
1090         if( trace->origin[ 0 ] > light->maxs[ 0 ] || trace->origin[ 0 ] < light->mins[ 0 ] ||
1091                 trace->origin[ 1 ] > light->maxs[ 1 ] || trace->origin[ 1 ] < light->mins[ 1 ] ||
1092                 trace->origin[ 2 ] > light->maxs[ 2 ] || trace->origin[ 2 ] < light->mins[ 2 ] )
1093         {
1094                 gridBoundsCulled++;
1095                 return qfalse;
1096         }
1097
1098         /* set light origin */
1099         if( light->type == EMIT_SUN )
1100                 VectorAdd( trace->origin, light->origin, trace->end );
1101         else
1102                 VectorCopy( light->origin, trace->end );
1103
1104         /* set direction */
1105         dist = SetupTrace( trace );
1106
1107         /* test envelope */
1108         if( dist > light->envelope )
1109         {
1110                 gridEnvelopeCulled++;
1111                 return qfalse;
1112         }
1113
1114         /* ptpff approximation */
1115         if( light->type == EMIT_AREA && faster )
1116         {
1117                 /* clamp the distance to prevent super hot spots */
1118                 if( dist < 16.0f )
1119                         dist = 16.0f;
1120
1121                 /* attenuate */
1122                 add = light->photons / (dist * dist);
1123         }
1124
1125         /* exact point to polygon form factor */
1126         else if( light->type == EMIT_AREA )
1127         {
1128                 float           factor, d;
1129                 vec3_t          pushedOrigin;
1130
1131
1132                 /* see if the point is behind the light */
1133                 d = DotProduct( trace->origin, light->normal ) - light->dist;
1134                 if( !(light->flags & LIGHT_TWOSIDED) && d < -1.0f )
1135                         return qfalse;
1136
1137                 /* nudge the point so that it is clearly forward of the light */
1138                 /* so that surfaces meeting a light emiter don't get black edges */
1139                 if( d > -8.0f && d < 8.0f )
1140                         VectorMA( trace->origin, (8.0f - d), light->normal, pushedOrigin );
1141                 else
1142                         VectorCopy( trace->origin, pushedOrigin );
1143
1144                 /* calculate the contribution (ydnar 2002-10-21: [bug 642] bad normal calc) */
1145                 factor = PointToPolygonFormFactor( pushedOrigin, trace->direction, light->w );
1146                 if( factor == 0.0f )
1147                         return qfalse;
1148                 else if( factor < 0.0f )
1149                 {
1150                         if( light->flags & LIGHT_TWOSIDED )
1151                                 factor = -factor;
1152                         else
1153                                 return qfalse;
1154                 }
1155
1156                 /* ydnar: moved to here */
1157                 add = factor * light->add;
1158         }
1159
1160         /* point/spot lights */
1161         else if( light->type == EMIT_POINT || light->type == EMIT_SPOT )
1162         {
1163                 /* clamp the distance to prevent super hot spots */
1164                 if( dist < 16.0f )
1165                         dist = 16.0f;
1166
1167                 /* attenuate */
1168                 if( light->flags & LIGHT_ATTEN_LINEAR )
1169                 {
1170                         add = light->photons * linearScale - (dist * light->fade);
1171                         if( add < 0.0f )
1172                                 add = 0.0f;
1173                 }
1174                 else
1175                         add = light->photons / (dist * dist);
1176
1177                 /* handle spotlights */
1178                 if( light->type == EMIT_SPOT )
1179                 {
1180                         float   distByNormal, radiusAtDist, sampleRadius;
1181                         vec3_t  pointAtDist, distToSample;
1182
1183
1184                         /* do cone calculation */
1185                         distByNormal = -DotProduct( trace->displacement, light->normal );
1186                         if( distByNormal < 0.0f )
1187                                 return qfalse;
1188                         VectorMA( light->origin, distByNormal, light->normal, pointAtDist );
1189                         radiusAtDist = light->radiusByDist * distByNormal;
1190                         VectorSubtract( trace->origin, pointAtDist, distToSample );
1191                         sampleRadius = VectorLength( distToSample );
1192
1193                         /* outside the cone */
1194                         if( sampleRadius >= radiusAtDist )
1195                                 return qfalse;
1196
1197                         /* attenuate */
1198                         if( sampleRadius > (radiusAtDist - 32.0f) )
1199                                 add *= ((radiusAtDist - sampleRadius) / 32.0f);
1200                 }
1201         }
1202
1203         /* ydnar: sunlight */
1204         else if( light->type == EMIT_SUN )
1205         {
1206                 /* attenuate */
1207                 add = light->photons;
1208                 if( add <= 0.0f )
1209                         return qfalse;
1210
1211                 /* setup trace */
1212                 trace->testAll = qtrue;
1213                 VectorScale( light->color, add, trace->color );
1214
1215                 /* trace to point */
1216                 if( trace->testOcclusion && !trace->forceSunlight )
1217                 {
1218                         /* trace */
1219                         TraceLine( trace );
1220                         if( !(trace->compileFlags & C_SKY) || trace->opaque )
1221                         {
1222                                 VectorClear( trace->color );
1223                                 return -1;
1224                         }
1225                 }
1226
1227                 /* return to sender */
1228                 return qtrue;
1229         }
1230
1231         /* unknown light type */
1232         else
1233                 return qfalse;
1234
1235         /* ydnar: changed to a variable number */
1236         if( add <= 0.0f || (add <= light->falloffTolerance && (light->flags & LIGHT_FAST_ACTUAL)) )
1237                 return qfalse;
1238
1239         /* setup trace */
1240         trace->testAll = qfalse;
1241         VectorScale( light->color, add, trace->color );
1242
1243         /* trace */
1244         TraceLine( trace );
1245         if( trace->passSolid )
1246         {
1247                 VectorClear( trace->color );
1248                 return qfalse;
1249         }
1250
1251         /* we have a valid sample */
1252         return qtrue;
1253 }
1254
1255
1256
1257 /*
1258 TraceGrid()
1259 grid samples are for quickly determining the lighting
1260 of dynamically placed entities in the world
1261 */
1262
1263 #define MAX_CONTRIBUTIONS       1024
1264
1265 typedef struct
1266 {
1267         vec3_t          dir;
1268         vec3_t          color;
1269         int                     style;
1270 }
1271 contribution_t;
1272
1273 void TraceGrid( int num )
1274 {
1275         int                                             i, j, x, y, z, mod, step, numCon, numStyles;
1276         float                                   d;
1277         vec3_t                                  baseOrigin, cheapColor, color;
1278         rawGridPoint_t                  *gp;
1279         bspGridPoint_t                  *bgp;
1280         contribution_t                  contributions[ MAX_CONTRIBUTIONS ];
1281         trace_t                                 trace;
1282
1283
1284         /* get grid points */
1285         gp = &rawGridPoints[ num ];
1286         bgp = &bspGridPoints[ num ];
1287
1288         /* get grid origin */
1289         mod = num;
1290         z = mod / (gridBounds[ 0 ] * gridBounds[ 1 ]);
1291         mod -= z * (gridBounds[ 0 ] * gridBounds[ 1 ]);
1292         y = mod / gridBounds[ 0 ];
1293         mod -= y * gridBounds[ 0 ];
1294         x = mod;
1295
1296         trace.origin[ 0 ] = gridMins[ 0 ] + x * gridSize[ 0 ];
1297         trace.origin[ 1 ] = gridMins[ 1 ] + y * gridSize[ 1 ];
1298         trace.origin[ 2 ] = gridMins[ 2 ] + z * gridSize[ 2 ];
1299
1300         /* set inhibit sphere */
1301         if( gridSize[ 0 ] > gridSize[ 1 ] && gridSize[ 0 ] > gridSize[ 2 ] )
1302                 trace.inhibitRadius = gridSize[ 0 ] * 0.5f;
1303         else if( gridSize[ 1 ] > gridSize[ 0 ] && gridSize[ 1 ] > gridSize[ 2 ] )
1304                 trace.inhibitRadius = gridSize[ 1 ] * 0.5f;
1305         else
1306                 trace.inhibitRadius = gridSize[ 2 ] * 0.5f;
1307
1308         /* find point cluster */
1309         trace.cluster = ClusterForPointExt( trace.origin, GRID_EPSILON );
1310         if( trace.cluster < 0 )
1311         {
1312                 /* try to nudge the origin around to find a valid point */
1313                 VectorCopy( trace.origin, baseOrigin );
1314                 for( step = 9; step <= 18; step += 9 )
1315                 {
1316                         for( i = 0; i < 8; i++ )
1317                         {
1318                                 VectorCopy( baseOrigin, trace.origin );
1319                                 if( i & 1 )
1320                                         trace.origin[ 0 ] += step;
1321                                 else
1322                                         trace.origin[ 0 ] -= step;
1323
1324                                 if( i & 2 )
1325                                         trace.origin[ 1 ] += step;
1326                                 else
1327                                         trace.origin[ 1 ] -= step;
1328
1329                                 if( i & 4 )
1330                                         trace.origin[ 2 ] += step;
1331                                 else
1332                                         trace.origin[ 2 ] -= step;
1333
1334                                 /* ydnar: changed to find cluster num */
1335                                 trace.cluster = ClusterForPointExt( trace.origin, VERTEX_EPSILON );
1336                                 if( trace.cluster >= 0 )
1337                                         break;
1338                         }
1339
1340                         if( i != 8 )
1341                                 break;
1342                 }
1343
1344                 /* can't find a valid point at all */
1345                 if( step > 18 )
1346                         return;
1347         }
1348
1349         /* setup trace */
1350         trace.testOcclusion = !noTrace;
1351         trace.forceSunlight = qfalse;
1352         trace.recvShadows = WORLDSPAWN_RECV_SHADOWS;
1353         trace.numSurfaces = 0;
1354         trace.surfaces = NULL;
1355         trace.numLights = 0;
1356         trace.lights = NULL;
1357
1358         /* clear */
1359         numCon = 0;
1360         VectorClear( cheapColor );
1361
1362         /* trace to all the lights, find the major light direction, and divide the
1363            total light between that along the direction and the remaining in the ambient */
1364         for( trace.light = lights; trace.light != NULL; trace.light = trace.light->next )
1365         {
1366                 float           addSize;
1367
1368
1369                 /* sample light */
1370                 if( !LightContributionToPoint( &trace ) )
1371                         continue;
1372
1373                 /* handle negative light */
1374                 if( trace.light->flags & LIGHT_NEGATIVE )
1375                         VectorScale( trace.color, -1.0f, trace.color );
1376
1377                 /* add a contribution */
1378                 VectorCopy( trace.color, contributions[ numCon ].color );
1379                 VectorCopy( trace.direction, contributions[ numCon ].dir );
1380                 contributions[ numCon ].style = trace.light->style;
1381                 numCon++;
1382
1383                 /* push average direction around */
1384                 addSize = VectorLength( trace.color );
1385                 VectorMA( gp->dir, addSize, trace.direction, gp->dir );
1386
1387                 /* stop after a while */
1388                 if( numCon >= (MAX_CONTRIBUTIONS - 1) )
1389                         break;
1390
1391                 /* ydnar: cheap mode */
1392                 VectorAdd( cheapColor, trace.color, cheapColor );
1393                 if( cheapgrid && cheapColor[ 0 ] >= 255.0f && cheapColor[ 1 ] >= 255.0f && cheapColor[ 2 ] >= 255.0f )
1394                         break;
1395         }
1396
1397         /////// Floodlighting for point //////////////////
1398         //do our floodlight ambient occlusion loop, and add a single contribution based on the brightest dir
1399         if (floodlighty)
1400         {
1401                 int q;
1402                 float addSize,f;
1403                 vec3_t col,dir;
1404                 col[0]=col[1]=col[2]=floodlightIntensity;
1405                 dir[0]=dir[1]=0;
1406                 dir[2]=1;
1407
1408                 trace.testOcclusion = qtrue;
1409                 trace.forceSunlight = qfalse;
1410                 trace.inhibitRadius = DEFAULT_INHIBIT_RADIUS;
1411                 trace.testAll = qtrue;
1412
1413                 for (q=0;q<2;q++)
1414                 {
1415                         if (q==0) //upper hemisphere
1416                         {
1417                                 trace.normal[0]=0;
1418                                 trace.normal[1]=0;
1419                                 trace.normal[2]=1;
1420                         }
1421                         else //lower hemisphere
1422                         {
1423                                 trace.normal[0]=0;
1424                                 trace.normal[1]=0;
1425                                 trace.normal[2]=-1;
1426                         }
1427
1428                         f = FloodLightForSample(&trace, floodlightDistance, floodlight_lowquality);
1429
1430                         contributions[ numCon ].color[0]=col[0]*f;
1431                         contributions[ numCon ].color[1]=col[1]*f;
1432                         contributions[ numCon ].color[2]=col[2]*f;
1433
1434                         contributions[ numCon ].dir[0]=dir[0];
1435                         contributions[ numCon ].dir[1]=dir[1];
1436                         contributions[ numCon ].dir[2]=dir[2];
1437
1438                         contributions[ numCon ].style = 0;
1439                         numCon++;
1440                         /* push average direction around */
1441                         addSize = VectorLength( col );
1442                         VectorMA( gp->dir, addSize, dir, gp->dir );
1443                 }
1444         }
1445         /////////////////////
1446
1447         /* normalize to get primary light direction */
1448         VectorNormalize( gp->dir, gp->dir );
1449
1450         /* now that we have identified the primary light direction,
1451            go back and separate all the light into directed and ambient */
1452         numStyles = 1;
1453         for( i = 0; i < numCon; i++ )
1454         {
1455                 /* get relative directed strength */
1456                 d = DotProduct( contributions[ i ].dir, gp->dir );
1457                 if( d < 0.0f )
1458                         d = 0.0f;
1459
1460                 /* find appropriate style */
1461                 for( j = 0; j < numStyles; j++ )
1462                 {
1463                         if( gp->styles[ j ] == contributions[ i ].style )
1464                                 break;
1465                 }
1466
1467                 /* style not found? */
1468                 if( j >= numStyles )
1469                 {
1470                         /* add a new style */
1471                         if( numStyles < MAX_LIGHTMAPS )
1472                         {
1473                                 gp->styles[ numStyles ] = contributions[ i ].style;
1474                                 bgp->styles[ numStyles ] = contributions[ i ].style;
1475                                 numStyles++;
1476                                 //%     Sys_Printf( "(%d, %d) ", num, contributions[ i ].style );
1477                         }
1478
1479                         /* fallback */
1480                         else
1481                                 j = 0;
1482                 }
1483
1484                 /* add the directed color */
1485                 VectorMA( gp->directed[ j ], d, contributions[ i ].color, gp->directed[ j ] );
1486
1487                 /* ambient light will be at 1/4 the value of directed light */
1488                 /* (ydnar: nuke this in favor of more dramatic lighting?) */
1489                 /* (PM: how about actually making it work? d=1 when it got here for single lights/sun :P */
1490 //              d = 0.25f;
1491                 /* (Hobbes: always setting it to .25 is hardly any better) */
1492                 d = 0.25f * (1.0f - d);
1493                 VectorMA( gp->ambient[ j ], d, contributions[ i ].color, gp->ambient[ j ] );
1494         }
1495
1496
1497         /* store off sample */
1498         for( i = 0; i < MAX_LIGHTMAPS; i++ )
1499         {
1500                 /* do some fudging to keep the ambient from being too low (2003-07-05: 0.25 -> 0.125) */
1501                 if( !bouncing )
1502                         VectorMA( gp->ambient[ i ], 0.125f, gp->directed[ i ], gp->ambient[ i ] );
1503
1504                 /* set minimum light and copy off to bytes */
1505                 VectorCopy( gp->ambient[ i ], color );
1506                 for( j = 0; j < 3; j++ )
1507                         if( color[ j ] < minGridLight[ j ] )
1508                                 color[ j ] = minGridLight[ j ];
1509
1510                 /* vortex: apply gridscale and gridambientscale here */
1511                 ColorToBytes( color, bgp->ambient[ i ], gridScale*gridAmbientScale );
1512                 ColorToBytes( gp->directed[ i ], bgp->directed[ i ], gridScale );
1513         }
1514
1515         /* debug code */
1516         #if 0
1517                 //%     Sys_FPrintf( SYS_VRB, "%10d %10d %10d ", &gp->ambient[ 0 ][ 0 ], &gp->ambient[ 0 ][ 1 ], &gp->ambient[ 0 ][ 2 ] );
1518                 Sys_FPrintf( SYS_VRB, "%9d Amb: (%03.1f %03.1f %03.1f) Dir: (%03.1f %03.1f %03.1f)\n",
1519                         num,
1520                         gp->ambient[ 0 ][ 0 ], gp->ambient[ 0 ][ 1 ], gp->ambient[ 0 ][ 2 ],
1521                         gp->directed[ 0 ][ 0 ], gp->directed[ 0 ][ 1 ], gp->directed[ 0 ][ 2 ] );
1522         #endif
1523
1524         /* store direction */
1525         if( !bouncing )
1526                 NormalToLatLong( gp->dir, bgp->latLong );
1527 }
1528
1529
1530
1531 /*
1532 SetupGrid()
1533 calculates the size of the lightgrid and allocates memory
1534 */
1535
1536 void SetupGrid( void )
1537 {
1538         int                     i, j;
1539         vec3_t          maxs, oldGridSize;
1540         const char      *value;
1541         char            temp[ 64 ];
1542
1543
1544         /* don't do this if not grid lighting */
1545         if( noGridLighting )
1546                 return;
1547
1548         /* ydnar: set grid size */
1549         value = ValueForKey( &entities[ 0 ], "gridsize" );
1550         if( value[ 0 ] != '\0' )
1551                 sscanf( value, "%f %f %f", &gridSize[ 0 ], &gridSize[ 1 ], &gridSize[ 2 ] );
1552
1553         /* quantize it */
1554         VectorCopy( gridSize, oldGridSize );
1555         for( i = 0; i < 3; i++ )
1556                 gridSize[ i ] = gridSize[ i ] >= 8.0f ? floor( gridSize[ i ] ) : 8.0f;
1557
1558         /* ydnar: increase gridSize until grid count is smaller than max allowed */
1559         numRawGridPoints = MAX_MAP_LIGHTGRID + 1;
1560         j = 0;
1561         while( numRawGridPoints > MAX_MAP_LIGHTGRID )
1562         {
1563                 /* get world bounds */
1564                 for( i = 0; i < 3; i++ )
1565                 {
1566                         gridMins[ i ] = gridSize[ i ] * ceil( bspModels[ 0 ].mins[ i ] / gridSize[ i ] );
1567                         maxs[ i ] = gridSize[ i ] * floor( bspModels[ 0 ].maxs[ i ] / gridSize[ i ] );
1568                         gridBounds[ i ] = (maxs[ i ] - gridMins[ i ]) / gridSize[ i ] + 1;
1569                 }
1570
1571                 /* set grid size */
1572                 numRawGridPoints = gridBounds[ 0 ] * gridBounds[ 1 ] * gridBounds[ 2 ];
1573
1574                 /* increase grid size a bit */
1575                 if( numRawGridPoints > MAX_MAP_LIGHTGRID )
1576                         gridSize[ j++ % 3 ] += 16.0f;
1577         }
1578
1579         /* print it */
1580         Sys_Printf( "Grid size = { %1.0f, %1.0f, %1.0f }\n", gridSize[ 0 ], gridSize[ 1 ], gridSize[ 2 ] );
1581
1582         /* different? */
1583         if( !VectorCompare( gridSize, oldGridSize ) )
1584         {
1585                 sprintf( temp, "%.0f %.0f %.0f", gridSize[ 0 ], gridSize[ 1 ], gridSize[ 2 ] );
1586                 SetKeyValue( &entities[ 0 ], "gridsize", (const char*) temp );
1587                 Sys_FPrintf( SYS_VRB, "Storing adjusted grid size\n" );
1588         }
1589
1590         /* 2nd variable. fixme: is this silly? */
1591         numBSPGridPoints = numRawGridPoints;
1592
1593         /* allocate lightgrid */
1594         rawGridPoints = safe_malloc( numRawGridPoints * sizeof( *rawGridPoints ) );
1595         memset( rawGridPoints, 0, numRawGridPoints * sizeof( *rawGridPoints ) );
1596
1597         if( bspGridPoints != NULL )
1598                 free( bspGridPoints );
1599         bspGridPoints = safe_malloc( numBSPGridPoints * sizeof( *bspGridPoints ) );
1600         memset( bspGridPoints, 0, numBSPGridPoints * sizeof( *bspGridPoints ) );
1601
1602         /* clear lightgrid */
1603         for( i = 0; i < numRawGridPoints; i++ )
1604         {
1605                 VectorCopy( ambientColor, rawGridPoints[ i ].ambient[ j ] );
1606                 rawGridPoints[ i ].styles[ 0 ] = LS_NORMAL;
1607                 bspGridPoints[ i ].styles[ 0 ] = LS_NORMAL;
1608                 for( j = 1; j < MAX_LIGHTMAPS; j++ )
1609                 {
1610                         rawGridPoints[ i ].styles[ j ] = LS_NONE;
1611                         bspGridPoints[ i ].styles[ j ] = LS_NONE;
1612                 }
1613         }
1614
1615         /* note it */
1616         Sys_Printf( "%9d grid points\n", numRawGridPoints );
1617 }
1618
1619
1620
1621 /*
1622 LightWorld()
1623 does what it says...
1624 */
1625
1626 void LightWorld( void )
1627 {
1628         vec3_t          color;
1629         float           f;
1630         int                     b, bt;
1631         qboolean        minVertex, minGrid;
1632         const char      *value;
1633
1634
1635         /* ydnar: smooth normals */
1636         if( shade )
1637         {
1638                 Sys_Printf( "--- SmoothNormals ---\n" );
1639                 SmoothNormals();
1640         }
1641
1642         /* determine the number of grid points */
1643         Sys_Printf( "--- SetupGrid ---\n" );
1644         SetupGrid();
1645
1646         /* find the optional minimum lighting values */
1647         GetVectorForKey( &entities[ 0 ], "_color", color );
1648         if( VectorLength( color ) == 0.0f )
1649                 VectorSet( color, 1.0, 1.0, 1.0 );
1650
1651         /* ambient */
1652         f = FloatForKey( &entities[ 0 ], "_ambient" );
1653         if( f == 0.0f )
1654                 f = FloatForKey( &entities[ 0 ], "ambient" );
1655         VectorScale( color, f, ambientColor );
1656
1657         /* minvertexlight */
1658         minVertex = qfalse;
1659         value = ValueForKey( &entities[ 0 ], "_minvertexlight" );
1660         if( value[ 0 ] != '\0' )
1661         {
1662                 minVertex = qtrue;
1663                 f = atof( value );
1664                 VectorScale( color, f, minVertexLight );
1665         }
1666
1667         /* mingridlight */
1668         minGrid = qfalse;
1669         value = ValueForKey( &entities[ 0 ], "_mingridlight" );
1670         if( value[ 0 ] != '\0' )
1671         {
1672                 minGrid = qtrue;
1673                 f = atof( value );
1674                 VectorScale( color, f, minGridLight );
1675         }
1676
1677         /* minlight */
1678         value = ValueForKey( &entities[ 0 ], "_minlight" );
1679         if( value[ 0 ] != '\0' )
1680         {
1681                 f = atof( value );
1682                 VectorScale( color, f, minLight );
1683                 if( minVertex == qfalse )
1684                         VectorScale( color, f, minVertexLight );
1685                 if( minGrid == qfalse )
1686                         VectorScale( color, f, minGridLight );
1687         }
1688
1689         /* create world lights */
1690         Sys_FPrintf( SYS_VRB, "--- CreateLights ---\n" );
1691         CreateEntityLights();
1692         CreateSurfaceLights();
1693         Sys_Printf( "%9d point lights\n", numPointLights );
1694         Sys_Printf( "%9d spotlights\n", numSpotLights );
1695         Sys_Printf( "%9d diffuse (area) lights\n", numDiffuseLights );
1696         Sys_Printf( "%9d sun/sky lights\n", numSunLights );
1697
1698         /* calculate lightgrid */
1699         if( !noGridLighting )
1700         {
1701                 /* ydnar: set up light envelopes */
1702                 SetupEnvelopes( qtrue, fastgrid );
1703
1704                 Sys_Printf( "--- TraceGrid ---\n" );
1705                 RunThreadsOnIndividual( numRawGridPoints, qtrue, TraceGrid );
1706                 Sys_Printf( "%d x %d x %d = %d grid\n",
1707                         gridBounds[ 0 ], gridBounds[ 1 ], gridBounds[ 2 ], numBSPGridPoints );
1708
1709                 /* ydnar: emit statistics on light culling */
1710                 Sys_FPrintf( SYS_VRB, "%9d grid points envelope culled\n", gridEnvelopeCulled );
1711                 Sys_FPrintf( SYS_VRB, "%9d grid points bounds culled\n", gridBoundsCulled );
1712         }
1713
1714         /* slight optimization to remove a sqrt */
1715         subdivideThreshold *= subdivideThreshold;
1716
1717         /* map the world luxels */
1718         Sys_Printf( "--- MapRawLightmap ---\n" );
1719         RunThreadsOnIndividual( numRawLightmaps, qtrue, MapRawLightmap );
1720         Sys_Printf( "%9d luxels\n", numLuxels );
1721         Sys_Printf( "%9d luxels mapped\n", numLuxelsMapped );
1722         Sys_Printf( "%9d luxels occluded\n", numLuxelsOccluded );
1723
1724         /* dirty them up */
1725         if( dirty )
1726         {
1727                 Sys_Printf( "--- DirtyRawLightmap ---\n" );
1728
1729
1730
1731
1732                 RunThreadsOnIndividual( numRawLightmaps, qtrue, DirtyRawLightmap );
1733         }
1734
1735         /* floodlight pass */
1736         FloodlightRawLightmaps();
1737
1738         /* ydnar: set up light envelopes */
1739         SetupEnvelopes( qfalse, fast );
1740
1741         /* light up my world */
1742         lightsPlaneCulled = 0;
1743         lightsEnvelopeCulled = 0;
1744         lightsBoundsCulled = 0;
1745         lightsClusterCulled = 0;
1746
1747         Sys_Printf( "--- IlluminateRawLightmap ---\n" );
1748         RunThreadsOnIndividual( numRawLightmaps, qtrue, IlluminateRawLightmap );
1749         Sys_Printf( "%9d luxels illuminated\n", numLuxelsIlluminated );
1750
1751         StitchSurfaceLightmaps();
1752
1753         Sys_Printf( "--- IlluminateVertexes ---\n" );
1754         RunThreadsOnIndividual( numBSPDrawSurfaces, qtrue, IlluminateVertexes );
1755         Sys_Printf( "%9d vertexes illuminated\n", numVertsIlluminated );
1756
1757         /* ydnar: emit statistics on light culling */
1758         Sys_FPrintf( SYS_VRB, "%9d lights plane culled\n", lightsPlaneCulled );
1759         Sys_FPrintf( SYS_VRB, "%9d lights envelope culled\n", lightsEnvelopeCulled );
1760         Sys_FPrintf( SYS_VRB, "%9d lights bounds culled\n", lightsBoundsCulled );
1761         Sys_FPrintf( SYS_VRB, "%9d lights cluster culled\n", lightsClusterCulled );
1762
1763         /* radiosity */
1764         b = 1;
1765         bt = bounce;
1766         while( bounce > 0 )
1767         {
1768                 /* store off the bsp between bounces */
1769                 StoreSurfaceLightmaps();
1770                 UnparseEntities();
1771                 Sys_Printf( "Writing %s\n", source );
1772                 WriteBSPFile( source );
1773
1774                 /* note it */
1775                 Sys_Printf( "\n--- Radiosity (bounce %d of %d) ---\n", b, bt );
1776
1777                 /* flag bouncing */
1778                 bouncing = qtrue;
1779                 VectorClear( ambientColor );
1780                 floodlighty = qfalse;
1781
1782                 /* generate diffuse lights */
1783                 RadFreeLights();
1784                 RadCreateDiffuseLights();
1785
1786                 /* setup light envelopes */
1787                 SetupEnvelopes( qfalse, fastbounce );
1788                 if( numLights == 0 )
1789                 {
1790                         Sys_Printf( "No diffuse light to calculate, ending radiosity.\n" );
1791                         break;
1792                 }
1793
1794                 /* add to lightgrid */
1795                 if( bouncegrid )
1796                 {
1797                         gridEnvelopeCulled = 0;
1798                         gridBoundsCulled = 0;
1799
1800                         Sys_Printf( "--- BounceGrid ---\n" );
1801                         RunThreadsOnIndividual( numRawGridPoints, qtrue, TraceGrid );
1802                         Sys_FPrintf( SYS_VRB, "%9d grid points envelope culled\n", gridEnvelopeCulled );
1803                         Sys_FPrintf( SYS_VRB, "%9d grid points bounds culled\n", gridBoundsCulled );
1804                 }
1805
1806                 /* light up my world */
1807                 lightsPlaneCulled = 0;
1808                 lightsEnvelopeCulled = 0;
1809                 lightsBoundsCulled = 0;
1810                 lightsClusterCulled = 0;
1811
1812                 Sys_Printf( "--- IlluminateRawLightmap ---\n" );
1813                 RunThreadsOnIndividual( numRawLightmaps, qtrue, IlluminateRawLightmap );
1814                 Sys_Printf( "%9d luxels illuminated\n", numLuxelsIlluminated );
1815                 Sys_Printf( "%9d vertexes illuminated\n", numVertsIlluminated );
1816
1817                 StitchSurfaceLightmaps();
1818
1819                 Sys_Printf( "--- IlluminateVertexes ---\n" );
1820                 RunThreadsOnIndividual( numBSPDrawSurfaces, qtrue, IlluminateVertexes );
1821                 Sys_Printf( "%9d vertexes illuminated\n", numVertsIlluminated );
1822
1823                 /* ydnar: emit statistics on light culling */
1824                 Sys_FPrintf( SYS_VRB, "%9d lights plane culled\n", lightsPlaneCulled );
1825                 Sys_FPrintf( SYS_VRB, "%9d lights envelope culled\n", lightsEnvelopeCulled );
1826                 Sys_FPrintf( SYS_VRB, "%9d lights bounds culled\n", lightsBoundsCulled );
1827                 Sys_FPrintf( SYS_VRB, "%9d lights cluster culled\n", lightsClusterCulled );
1828
1829                 /* interate */
1830                 bounce--;
1831                 b++;
1832         }
1833 }
1834
1835
1836
1837 /*
1838 LightMain()
1839 main routine for light processing
1840 */
1841
1842 int LightMain( int argc, char **argv )
1843 {
1844         int                     i;
1845         float           f;
1846         char            mapSource[ 1024 ];
1847         const char      *value;
1848         int lightmapMergeSize = 0;
1849
1850
1851         /* note it */
1852         Sys_Printf( "--- Light ---\n" );
1853         Sys_Printf( "--- ProcessGameSpecific ---\n" );
1854
1855         /* set standard game flags */
1856         wolfLight = game->wolfLight;
1857         if (wolfLight == qtrue)
1858                 Sys_Printf( " lightning model: wolf\n" );
1859         else
1860                 Sys_Printf( " lightning model: quake3\n" );
1861
1862         lmCustomSize = game->lightmapSize;
1863         Sys_Printf( " lightmap size: %d x %d pixels\n", lmCustomSize, lmCustomSize );
1864
1865         lightmapGamma = game->lightmapGamma;
1866         Sys_Printf( " lightning gamma: %f\n", lightmapGamma );
1867
1868         lightmapCompensate = game->lightmapCompensate;
1869         Sys_Printf( " lightning compensation: %f\n", lightmapCompensate );
1870
1871         lightmapExposure = game->lightmapExposure;
1872         Sys_Printf( " lightning exposure: %f\n", lightmapExposure );
1873
1874         gridScale = game->gridScale;
1875         Sys_Printf( " lightgrid scale: %f\n", gridScale );
1876
1877         gridAmbientScale = game->gridAmbientScale;
1878         Sys_Printf( " lightgrid ambient scale: %f\n", gridAmbientScale );
1879
1880         noStyles = game->noStyles;
1881         if (noStyles == qtrue)
1882                 Sys_Printf( " shader lightstyles hack: disabled\n" );
1883         else
1884                 Sys_Printf( " shader lightstyles hack: enabled\n" );
1885
1886         keepLights = game->keepLights;
1887         if (keepLights == qtrue)
1888                 Sys_Printf( " keep lights: enabled\n" );
1889         else
1890                 Sys_Printf( " keep lights: disabled\n" );
1891
1892         patchShadows = game->patchShadows;
1893         if (patchShadows == qtrue)
1894                 Sys_Printf( " patch shadows: enabled\n" );
1895         else
1896                 Sys_Printf( " patch shadows: disabled\n" );
1897
1898         deluxemap = game->deluxeMap;
1899         deluxemode = game->deluxeMode;
1900         if (deluxemap == qtrue)
1901         {
1902                 if (deluxemode)
1903                         Sys_Printf( " deluxemapping: enabled with tangentspace deluxemaps\n" );
1904                 else
1905                         Sys_Printf( " deluxemapping: enabled with modelspace deluxemaps\n" );
1906         }
1907         else
1908                 Sys_Printf( " deluxemapping: disabled\n" );
1909
1910         Sys_Printf( "--- ProcessCommandLine ---\n" );
1911
1912         /* process commandline arguments */
1913         for( i = 1; i < (argc - 1); i++ )
1914         {
1915                 /* lightsource scaling */
1916                 if( !strcmp( argv[ i ], "-point" ) || !strcmp( argv[ i ], "-pointscale" ) )
1917                 {
1918                         f = atof( argv[ i + 1 ] );
1919                         pointScale *= f;
1920                         Sys_Printf( "Point (entity) light scaled by %f to %f\n", f, pointScale );
1921                         i++;
1922                 }
1923
1924                 else if( !strcmp( argv[ i ], "-area" ) || !strcmp( argv[ i ], "-areascale" ) )
1925                 {
1926                         f = atof( argv[ i + 1 ] );
1927                         areaScale *= f;
1928                         Sys_Printf( "Area (shader) light scaled by %f to %f\n", f, areaScale );
1929                         i++;
1930                 }
1931
1932                 else if( !strcmp( argv[ i ], "-sky" ) || !strcmp( argv[ i ], "-skyscale" ) )
1933                 {
1934                         f = atof( argv[ i + 1 ] );
1935                         skyScale *= f;
1936                         Sys_Printf( "Sky/sun light scaled by %f to %f\n", f, skyScale );
1937                         i++;
1938                 }
1939
1940                 else if( !strcmp( argv[ i ], "-bouncescale" ) )
1941                 {
1942                         f = atof( argv[ i + 1 ] );
1943                         bounceScale *= f;
1944                         Sys_Printf( "Bounce (radiosity) light scaled by %f to %f\n", f, bounceScale );
1945                         i++;
1946                 }
1947
1948                 else if( !strcmp( argv[ i ], "-scale" ) )
1949                 {
1950                         f = atof( argv[ i + 1 ] );
1951                         pointScale *= f;
1952                         areaScale *= f;
1953                         skyScale *= f;
1954                         bounceScale *= f;
1955                         Sys_Printf( "All light scaled by %f\n", f );
1956                         i++;
1957                 }
1958
1959                 else if( !strcmp( argv[ i ], "-gridscale" ) )
1960                 {
1961                         f = atof( argv[ i + 1 ] );
1962                         Sys_Printf( "Grid lightning scaled by %f\n", f );
1963                         gridScale *= f;
1964                         i++;
1965                 }
1966
1967                 else if( !strcmp( argv[ i ], "-gridambientscale" ) )
1968                 {
1969                         f = atof( argv[ i + 1 ] );
1970                         Sys_Printf( "Grid ambient lightning scaled by %f\n", f );
1971                         gridAmbientScale *= f;
1972                         i++;
1973                 }
1974
1975                 else if( !strcmp( argv[ i ], "-gamma" ) )
1976                 {
1977                         f = atof( argv[ i + 1 ] );
1978                         lightmapGamma = f;
1979                         Sys_Printf( "Lighting gamma set to %f\n", lightmapGamma );
1980                         i++;
1981                 }
1982
1983                 else if( !strcmp( argv[ i ], "-exposure" ) )
1984                 {
1985                         f = atof( argv[ i + 1 ] );
1986                         lightmapExposure = f;
1987                         Sys_Printf( "Lighting exposure set to %f\n", lightmapExposure );
1988                         i++;
1989                 }
1990
1991                 else if( !strcmp( argv[ i ], "-compensate" ) )
1992                 {
1993                         f = atof( argv[ i + 1 ] );
1994                         if( f <= 0.0f )
1995                                 f = 1.0f;
1996                         lightmapCompensate = f;
1997                         Sys_Printf( "Lighting compensation set to 1/%f\n", lightmapCompensate );
1998                         i++;
1999                 }
2000
2001                 /* ydnar switches */
2002                 else if( !strcmp( argv[ i ], "-bounce" ) )
2003                 {
2004                         bounce = atoi( argv[ i + 1 ] );
2005                         if( bounce < 0 )
2006                                 bounce = 0;
2007                         else if( bounce > 0 )
2008                                 Sys_Printf( "Radiosity enabled with %d bounce(s)\n", bounce );
2009                         i++;
2010                 }
2011
2012                 else if( !strcmp( argv[ i ], "-supersample" ) || !strcmp( argv[ i ], "-super" ) )
2013                 {
2014                         superSample = atoi( argv[ i + 1 ] );
2015                         if( superSample < 1 )
2016                                 superSample = 1;
2017                         else if( superSample > 1 )
2018                                 Sys_Printf( "Ordered-grid supersampling enabled with %d sample(s) per lightmap texel\n", (superSample * superSample) );
2019                         i++;
2020                 }
2021
2022                 else if( !strcmp( argv[ i ], "-samples" ) )
2023                 {
2024                         lightSamples = atoi( argv[ i + 1 ] );
2025                         if( lightSamples < 1 )
2026                                 lightSamples = 1;
2027                         else if( lightSamples > 1 )
2028                                 Sys_Printf( "Adaptive supersampling enabled with %d sample(s) per lightmap texel\n", lightSamples );
2029                         i++;
2030                 }
2031
2032                 else if( !strcmp( argv[ i ], "-filter" ) )
2033                 {
2034                         filter = qtrue;
2035                         Sys_Printf( "Lightmap filtering enabled\n" );
2036                 }
2037
2038                 else if( !strcmp( argv[ i ], "-dark" ) )
2039                 {
2040                         dark = qtrue;
2041                         Sys_Printf( "Dark lightmap seams enabled\n" );
2042                 }
2043
2044                 else if( !strcmp( argv[ i ], "-shadeangle" ) )
2045                 {
2046                         shadeAngleDegrees = atof( argv[ i + 1 ] );
2047                         if( shadeAngleDegrees < 0.0f )
2048                                 shadeAngleDegrees = 0.0f;
2049                         else if( shadeAngleDegrees > 0.0f )
2050                         {
2051                                 shade = qtrue;
2052                                 Sys_Printf( "Phong shading enabled with a breaking angle of %f degrees\n", shadeAngleDegrees );
2053                         }
2054                         i++;
2055                 }
2056
2057                 else if( !strcmp( argv[ i ], "-thresh" ) )
2058                 {
2059                         subdivideThreshold = atof( argv[ i + 1 ] );
2060                         if( subdivideThreshold < 0 )
2061                                 subdivideThreshold = DEFAULT_SUBDIVIDE_THRESHOLD;
2062                         else
2063                                 Sys_Printf( "Subdivision threshold set at %.3f\n", subdivideThreshold );
2064                         i++;
2065                 }
2066
2067                 else if( !strcmp( argv[ i ], "-approx" ) )
2068                 {
2069                         approximateTolerance = atoi( argv[ i + 1 ] );
2070                         if( approximateTolerance < 0 )
2071                                 approximateTolerance = 0;
2072                         else if( approximateTolerance > 0 )
2073                                 Sys_Printf( "Approximating lightmaps within a byte tolerance of %d\n", approximateTolerance );
2074                         i++;
2075                 }
2076                 else if( !strcmp( argv[ i ], "-deluxe" ) || !strcmp( argv[ i ], "-deluxemap" ) )
2077                 {
2078                         deluxemap = qtrue;
2079                         Sys_Printf( "Generating deluxemaps for average light direction\n" );
2080                 }
2081                 else if( !strcmp( argv[ i ], "-deluxemode" ))
2082                 {
2083                         deluxemode = atoi( argv[ i + 1 ] );
2084                         if (deluxemode == 0 || deluxemode > 1 || deluxemode < 0)
2085                         {
2086                                 Sys_Printf( "Generating modelspace deluxemaps\n" );
2087                                 deluxemode = 0;
2088                         }
2089                         else
2090                                 Sys_Printf( "Generating tangentspace deluxemaps\n" );
2091                         i++;
2092                 }
2093                 else if( !strcmp( argv[ i ], "-nodeluxe" ) || !strcmp( argv[ i ], "-nodeluxemap" ) )
2094                 {
2095                         deluxemap = qfalse;
2096                         Sys_Printf( "Disabling generating of deluxemaps for average light direction\n" );
2097                 }
2098                 else if( !strcmp( argv[ i ], "-external" ) )
2099                 {
2100                         externalLightmaps = qtrue;
2101                         Sys_Printf( "Storing all lightmaps externally\n" );
2102                 }
2103
2104                 else if( !strcmp( argv[ i ], "-lightmapsize" ) )
2105                 {
2106                         lmCustomSize = atoi( argv[ i + 1 ] );
2107
2108                         /* must be a power of 2 and greater than 2 */
2109                         if( ((lmCustomSize - 1) & lmCustomSize) || lmCustomSize < 2 )
2110                         {
2111                                 Sys_Printf( "WARNING: Lightmap size must be a power of 2, greater or equal to 2 pixels.\n" );
2112                                 lmCustomSize = game->lightmapSize;
2113                         }
2114                         i++;
2115                         Sys_Printf( "Default lightmap size set to %d x %d pixels\n", lmCustomSize, lmCustomSize );
2116
2117                         /* enable external lightmaps */
2118                         if( lmCustomSize != game->lightmapSize )
2119                         {
2120                                 externalLightmaps = qtrue;
2121                                 Sys_Printf( "Storing all lightmaps externally\n" );
2122                         }
2123                 }
2124
2125                 else if( !strcmp( argv[ i ], "-rawlightmapsizelimit" ) )
2126                 {
2127                         lmLimitSize = atoi( argv[ i + 1 ] );
2128
2129                         i++;
2130                         Sys_Printf( "Raw lightmap size limit set to %d x %d pixels\n", lmLimitSize, lmLimitSize );
2131                 }
2132
2133                 else if( !strcmp( argv[ i ], "-lightmapdir" ) )
2134                 {
2135                         lmCustomDir = argv[i + 1];
2136                         i++;
2137                         Sys_Printf( "Lightmap directory set to %s\n", lmCustomDir );
2138                         externalLightmaps = qtrue;
2139                         Sys_Printf( "Storing all lightmaps externally\n" );
2140                 }
2141
2142                 /* ydnar: add this to suppress warnings */
2143                 else if( !strcmp( argv[ i ],  "-custinfoparms") )
2144                 {
2145                         Sys_Printf( "Custom info parms enabled\n" );
2146                         useCustomInfoParms = qtrue;
2147                 }
2148
2149                 else if( !strcmp( argv[ i ], "-wolf" ) )
2150                 {
2151                         /* -game should already be set */
2152                         wolfLight = qtrue;
2153                         Sys_Printf( "Enabling Wolf lighting model (linear default)\n" );
2154                 }
2155
2156                 else if( !strcmp( argv[ i ], "-q3" ) )
2157                 {
2158                         /* -game should already be set */
2159                         wolfLight = qfalse;
2160                         Sys_Printf( "Enabling Quake 3 lighting model (nonlinear default)\n" );
2161                 }
2162
2163                 else if( !strcmp( argv[ i ], "-sunonly" ) )
2164                 {
2165                         sunOnly = qtrue;
2166                         Sys_Printf( "Only computing sunlight\n" );
2167                 }
2168
2169                 else if( !strcmp( argv[ i ], "-bounceonly" ) )
2170                 {
2171                         bounceOnly = qtrue;
2172                         Sys_Printf( "Storing bounced light (radiosity) only\n" );
2173                 }
2174
2175                 else if( !strcmp( argv[ i ], "-nocollapse" ) )
2176                 {
2177                         noCollapse = qtrue;
2178                         Sys_Printf( "Identical lightmap collapsing disabled\n" );
2179                 }
2180
2181                 else if( !strcmp( argv[ i ], "-nolightmapsearch" ) )
2182                 {
2183                         lightmapSearchBlockSize = 1;
2184                         Sys_Printf( "No lightmap searching - all lightmaps will be sequential\n" );
2185                 }
2186
2187                 else if( !strcmp( argv[ i ], "-lightmapsearchpower" ) )
2188                 {
2189                         lightmapMergeSize = (game->lightmapSize << atoi(argv[i+1]));
2190                         ++i;
2191                         Sys_Printf( "Restricted lightmap searching enabled - optimize for lightmap merge power %d (size %d)\n", atoi(argv[i]), lightmapMergeSize );
2192                 }
2193
2194                 else if( !strcmp( argv[ i ], "-lightmapsearchblocksize" ) )
2195                 {
2196                         lightmapSearchBlockSize = atoi(argv[i+1]);
2197                         ++i;
2198                         Sys_Printf( "Restricted lightmap searching enabled - block size set to %d\n", lightmapSearchBlockSize );
2199                 }
2200
2201                 else if( !strcmp( argv[ i ], "-shade" ) )
2202                 {
2203                         shade = qtrue;
2204                         Sys_Printf( "Phong shading enabled\n" );
2205                 }
2206
2207                 else if( !strcmp( argv[ i ], "-bouncegrid") )
2208                 {
2209                         bouncegrid = qtrue;
2210                         if( bounce > 0 )
2211                                 Sys_Printf( "Grid lighting with radiosity enabled\n" );
2212                 }
2213
2214                 else if( !strcmp( argv[ i ], "-smooth" ) )
2215                 {
2216                         lightSamples = EXTRA_SCALE;
2217                         Sys_Printf( "The -smooth argument is deprecated, use \"-samples 2\" instead\n" );
2218                 }
2219
2220                 else if( !strcmp( argv[ i ], "-fast" ) )
2221                 {
2222                         fast = qtrue;
2223                         fastgrid = qtrue;
2224                         fastbounce = qtrue;
2225                         Sys_Printf( "Fast mode enabled\n" );
2226                 }
2227
2228                 else if( !strcmp( argv[ i ], "-faster" ) )
2229                 {
2230                         faster = qtrue;
2231                         fast = qtrue;
2232                         fastgrid = qtrue;
2233                         fastbounce = qtrue;
2234                         Sys_Printf( "Faster mode enabled\n" );
2235                 }
2236
2237                 else if( !strcmp( argv[ i ], "-fastgrid" ) )
2238                 {
2239                         fastgrid = qtrue;
2240                         Sys_Printf( "Fast grid lighting enabled\n" );
2241                 }
2242
2243                 else if( !strcmp( argv[ i ], "-fastbounce" ) )
2244                 {
2245                         fastbounce = qtrue;
2246                         Sys_Printf( "Fast bounce mode enabled\n" );
2247                 }
2248
2249                 else if( !strcmp( argv[ i ], "-cheap" ) )
2250                 {
2251                         cheap = qtrue;
2252                         cheapgrid = qtrue;
2253                         Sys_Printf( "Cheap mode enabled\n" );
2254                 }
2255
2256                 else if( !strcmp( argv[ i ], "-cheapgrid" ) )
2257                 {
2258                         cheapgrid = qtrue;
2259                         Sys_Printf( "Cheap grid mode enabled\n" );
2260                 }
2261
2262                 else if( !strcmp( argv[ i ], "-normalmap" ) )
2263                 {
2264                         normalmap = qtrue;
2265                         Sys_Printf( "Storing normal map instead of lightmap\n" );
2266                 }
2267
2268                 else if( !strcmp( argv[ i ], "-trisoup" ) )
2269                 {
2270                         trisoup = qtrue;
2271                         Sys_Printf( "Converting brush faces to triangle soup\n" );
2272                 }
2273
2274                 else if( !strcmp( argv[ i ], "-debug" ) )
2275                 {
2276                         debug = qtrue;
2277                         Sys_Printf( "Lightmap debugging enabled\n" );
2278                 }
2279
2280                 else if( !strcmp( argv[ i ], "-debugsurfaces" ) || !strcmp( argv[ i ], "-debugsurface" ) )
2281                 {
2282                         debugSurfaces = qtrue;
2283                         Sys_Printf( "Lightmap surface debugging enabled\n" );
2284                 }
2285
2286                 else if( !strcmp( argv[ i ], "-debugunused" ) )
2287                 {
2288                         debugUnused = qtrue;
2289                         Sys_Printf( "Unused luxel debugging enabled\n" );
2290                 }
2291
2292                 else if( !strcmp( argv[ i ], "-debugaxis" ) )
2293                 {
2294                         debugAxis = qtrue;
2295                         Sys_Printf( "Lightmap axis debugging enabled\n" );
2296                 }
2297
2298                 else if( !strcmp( argv[ i ], "-debugcluster" ) )
2299                 {
2300                         debugCluster = qtrue;
2301                         Sys_Printf( "Luxel cluster debugging enabled\n" );
2302                 }
2303
2304                 else if( !strcmp( argv[ i ], "-debugorigin" ) )
2305                 {
2306                         debugOrigin = qtrue;
2307                         Sys_Printf( "Luxel origin debugging enabled\n" );
2308                 }
2309
2310                 else if( !strcmp( argv[ i ], "-debugdeluxe" ) )
2311                 {
2312                         deluxemap = qtrue;
2313                         debugDeluxemap = qtrue;
2314                         Sys_Printf( "Deluxemap debugging enabled\n" );
2315                 }
2316
2317                 else if( !strcmp( argv[ i ], "-export" ) )
2318                 {
2319                         exportLightmaps = qtrue;
2320                         Sys_Printf( "Exporting lightmaps\n" );
2321                 }
2322
2323                 else if( !strcmp(argv[ i ], "-notrace" ))
2324                 {
2325                         noTrace = qtrue;
2326                         Sys_Printf( "Shadow occlusion disabled\n" );
2327                 }
2328                 else if( !strcmp(argv[ i ], "-patchshadows" ) )
2329                 {
2330                         patchShadows = qtrue;
2331                         Sys_Printf( "Patch shadow casting enabled\n" );
2332                 }
2333                 else if( !strcmp( argv[ i ], "-extra" ) )
2334                 {
2335                         superSample = EXTRA_SCALE;              /* ydnar */
2336                         Sys_Printf( "The -extra argument is deprecated, use \"-super 2\" instead\n" );
2337                 }
2338                 else if( !strcmp( argv[ i ], "-extrawide" ) )
2339                 {
2340                         superSample = EXTRAWIDE_SCALE;  /* ydnar */
2341                         filter = qtrue;                                 /* ydnar */
2342                         Sys_Printf( "The -extrawide argument is deprecated, use \"-filter [-super 2]\" instead\n");
2343                 }
2344                 else if( !strcmp( argv[ i ], "-samplesize" ) )
2345                 {
2346                         sampleSize = atoi( argv[ i + 1 ] );
2347                         if( sampleSize < 1 )
2348                                 sampleSize = 1;
2349                         i++;
2350                         Sys_Printf( "Default lightmap sample size set to %dx%d units\n", sampleSize, sampleSize );
2351                 }
2352                 else if( !strcmp( argv[ i ], "-minsamplesize" ) )
2353                 {
2354                         minSampleSize = atoi( argv[ i + 1 ] );
2355                         if( minSampleSize < 1 )
2356                                 minSampleSize = 1;
2357                         i++;
2358                         Sys_Printf( "Minimum lightmap sample size set to %dx%d units\n", minSampleSize, minSampleSize );
2359                 }
2360                 else if( !strcmp( argv[ i ],  "-samplescale" ) )
2361                 {
2362                         sampleScale = atoi( argv[ i + 1 ] );
2363                         i++;
2364                         Sys_Printf( "Lightmaps sample scale set to %d\n", sampleScale);
2365                 }
2366                 else if( !strcmp( argv[ i ], "-novertex" ) )
2367                 {
2368                         noVertexLighting = qtrue;
2369                         Sys_Printf( "Disabling vertex lighting\n" );
2370                 }
2371                 else if( !strcmp( argv[ i ], "-nogrid" ) )
2372                 {
2373                         noGridLighting = qtrue;
2374                         Sys_Printf( "Disabling grid lighting\n" );
2375                 }
2376                 else if( !strcmp( argv[ i ], "-border" ) )
2377                 {
2378                         lightmapBorder = qtrue;
2379                         Sys_Printf( "Adding debug border to lightmaps\n" );
2380                 }
2381                 else if( !strcmp( argv[ i ], "-nosurf" ) )
2382                 {
2383                         noSurfaces = qtrue;
2384                         Sys_Printf( "Not tracing against surfaces\n" );
2385                 }
2386                 else if( !strcmp( argv[ i ], "-dump" ) )
2387                 {
2388                         dump = qtrue;
2389                         Sys_Printf( "Dumping radiosity lights into numbered prefabs\n" );
2390                 }
2391                 else if( !strcmp( argv[ i ], "-lomem" ) )
2392                 {
2393                         loMem = qtrue;
2394                         Sys_Printf( "Enabling low-memory (potentially slower) lighting mode\n" );
2395                 }
2396                 else if( !strcmp( argv[ i ], "-nostyle" ) || !strcmp( argv[ i ], "-nostyles" ) )
2397                 {
2398                         noStyles = qtrue;
2399                         Sys_Printf( "Disabling lightstyles\n" );
2400                 }
2401                 else if( !strcmp( argv[ i ], "-style" ) || !strcmp( argv[ i ], "-styles" ) )
2402                 {
2403                         noStyles = qfalse;
2404                         Sys_Printf( "Enabling lightstyles\n" );
2405                 }
2406                 else if( !strcmp( argv[ i ], "-keeplights" ))
2407                 {
2408                         keepLights = qtrue;
2409                         Sys_Printf( "Leaving light entities on map after compile\n" );
2410                 }
2411                 else if( !strcmp( argv[ i ], "-cpma" ) )
2412                 {
2413                         cpmaHack = qtrue;
2414                         Sys_Printf( "Enabling Challenge Pro Mode Asstacular Vertex Lighting Mode (tm)\n" );
2415                 }
2416                 else if( !strcmp( argv[ i ], "-floodlight" ) )
2417                 {
2418                         floodlighty = qtrue;
2419                         Sys_Printf( "FloodLighting enabled\n" );
2420                 }
2421                 else if( !strcmp( argv[ i ], "-debugnormals" ) )
2422                 {
2423                         debugnormals = qtrue;
2424                         Sys_Printf( "DebugNormals enabled\n" );
2425                 }
2426                 else if( !strcmp( argv[ i ], "-lowquality" ) )
2427                 {
2428                         floodlight_lowquality = qtrue;
2429                         Sys_Printf( "Low Quality FloodLighting enabled\n" );
2430                 }
2431
2432                 /* r7: dirtmapping */
2433                 else if( !strcmp( argv[ i ], "-dirty" ) )
2434                 {
2435                         dirty = qtrue;
2436                         Sys_Printf( "Dirtmapping enabled\n" );
2437                 }
2438                 else if( !strcmp( argv[ i ], "-dirtdebug" ) || !strcmp( argv[ i ], "-debugdirt" ) )
2439                 {
2440                         dirtDebug = qtrue;
2441                         Sys_Printf( "Dirtmap debugging enabled\n" );
2442                 }
2443                 else if( !strcmp( argv[ i ], "-dirtmode" ) )
2444                 {
2445                         dirtMode = atoi( argv[ i + 1 ] );
2446                         if( dirtMode != 0 && dirtMode != 1 )
2447                                 dirtMode = 0;
2448                         if( dirtMode == 1 )
2449                                 Sys_Printf( "Enabling randomized dirtmapping\n" );
2450                         else
2451                                 Sys_Printf( "Enabling ordered dir mapping\n" );
2452                         i++;
2453                 }
2454                 else if( !strcmp( argv[ i ], "-dirtdepth" ) )
2455                 {
2456                         dirtDepth = atof( argv[ i + 1 ] );
2457                         if( dirtDepth <= 0.0f )
2458                                 dirtDepth = 128.0f;
2459                         Sys_Printf( "Dirtmapping depth set to %.1f\n", dirtDepth );
2460                         i++;
2461                 }
2462                 else if( !strcmp( argv[ i ], "-dirtscale" ) )
2463                 {
2464                         dirtScale = atof( argv[ i + 1 ] );
2465                         if( dirtScale <= 0.0f )
2466                                 dirtScale = 1.0f;
2467                         Sys_Printf( "Dirtmapping scale set to %.1f\n", dirtScale );
2468                         i++;
2469                 }
2470                 else if( !strcmp( argv[ i ], "-dirtgain" ) )
2471                 {
2472                         dirtGain = atof( argv[ i + 1 ] );
2473                         if( dirtGain <= 0.0f )
2474                                 dirtGain = 1.0f;
2475                         Sys_Printf( "Dirtmapping gain set to %.1f\n", dirtGain );
2476                         i++;
2477                 }
2478                 else if( !strcmp( argv[ i ], "-trianglecheck" ) )
2479                 {
2480                         lightmapTriangleCheck = qtrue;
2481                 }
2482                 else if( !strcmp( argv[ i ], "-extravisnudge" ) )
2483                 {
2484                         lightmapExtraVisClusterNudge = qtrue;
2485                 }
2486                 /* unhandled args */
2487                 else
2488                 {
2489                         Sys_Printf( "WARNING: Unknown argument \"%s\"\n", argv[ i ] );
2490                 }
2491
2492         }
2493
2494         /* fix up lightmap search power */
2495         if(lightmapMergeSize)
2496         {
2497                 lightmapSearchBlockSize = (lightmapMergeSize / lmCustomSize) * (lightmapMergeSize / lmCustomSize);
2498                 if(lightmapSearchBlockSize < 1)
2499                         lightmapSearchBlockSize = 1;
2500
2501                 Sys_Printf( "Restricted lightmap searching enabled - block size adjusted to %d\n", lightmapSearchBlockSize );
2502         }
2503
2504         /* clean up map name */
2505         strcpy( source, ExpandArg( argv[ i ] ) );
2506         StripExtension( source );
2507         DefaultExtension( source, ".bsp" );
2508         strcpy( mapSource, ExpandArg( argv[ i ] ) );
2509         StripExtension( mapSource );
2510         DefaultExtension( mapSource, ".map" );
2511
2512         /* ydnar: set default sample size */
2513         SetDefaultSampleSize( sampleSize );
2514
2515         /* ydnar: handle shaders */
2516         BeginMapShaderFile( source );
2517         LoadShaderInfo();
2518
2519         /* note loading */
2520         Sys_Printf( "Loading %s\n", source );
2521
2522         /* ydnar: load surface file */
2523         LoadSurfaceExtraFile( source );
2524
2525         /* load bsp file */
2526         LoadBSPFile( source );
2527
2528         /* parse bsp entities */
2529         ParseEntities();
2530
2531         /* inject command line parameters */
2532         InjectCommandLine(argv, 0, argc - 1);
2533
2534         /* load map file */
2535         value = ValueForKey( &entities[ 0 ], "_keepLights" );
2536         if( value[ 0 ] != '1' )
2537                 LoadMapFile( mapSource, qtrue );
2538
2539         /* set the entity/model origins and init yDrawVerts */
2540         SetEntityOrigins();
2541
2542         /* ydnar: set up optimization */
2543         SetupBrushes();
2544         SetupDirt();
2545         SetupFloodLight();
2546         SetupSurfaceLightmaps();
2547
2548         /* initialize the surface facet tracing */
2549         SetupTraceNodes();
2550
2551         /* light the world */
2552         LightWorld();
2553
2554         /* ydnar: store off lightmaps */
2555         StoreSurfaceLightmaps();
2556
2557         /* write out the bsp */
2558         UnparseEntities();
2559         Sys_Printf( "Writing %s\n", source );
2560         WriteBSPFile( source );
2561
2562         /* ydnar: export lightmaps */
2563         if( exportLightmaps && !externalLightmaps )
2564                 ExportLightmaps();
2565
2566         /* return to sender */
2567         return 0;
2568 }
2569