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                 light->extraDist = FloatForKey( e, "_extradist" );
 405                 if(light->extraDist == 0.0f)
 406                         light->extraDist = extraDist;
 407
 408                 intensity = intensity * pointScale;
 409                 light->photons = intensity;
 410
 411                 light->type = EMIT_POINT;
 412
 413                 /* set falloff threshold */
 414                 light->falloffTolerance = falloffTolerance / numSamples;
 415
 416                 /* lights with a target will be spotlights */
 417                 target = ValueForKey( e, "target" );
 418                 if( target[ 0 ] )
 419                 {
 420                         float           radius;
 421                         float           dist;
 422                         sun_t           sun;
 423                         const char      *_sun;
 424
 425
 426                         /* get target */
 427                         e2 = FindTargetEntity( target );
 428                         if( e2 == NULL )
 429                         {
 430                                 Sys_Printf( "WARNING: light at (%i %i %i) has missing target\n",
 431                                         (int) light->origin[ 0 ], (int) light->origin[ 1 ], (int) light->origin[ 2 ] );
 432                         }
 433                         else
 434                         {
 435                                 /* not a point light */
 436                                 numPointLights--;
 437                                 numSpotLights++;
 438
 439                                 /* make a spotlight */
 440                                 GetVectorForKey( e2, "origin", dest );
 441                                 VectorSubtract( dest, light->origin, light->normal );
 442                                 dist = VectorNormalize( light->normal, light->normal );
 443                                 radius = FloatForKey( e, "radius" );
 444                                 if( !radius )
 445                                         radius = 64;
 446                                 if( !dist )
 447                                         dist = 64;
 448                                 light->radiusByDist = (radius + 16) / dist;
 449                                 light->type = EMIT_SPOT;
 450
 451                                 /* ydnar: wolf mods: spotlights always use nonlinear + angle attenuation */
 452                                 light->flags &= ~LIGHT_ATTEN_LINEAR;
 453                                 light->flags |= LIGHT_ATTEN_ANGLE;
 454                                 light->fade = 1.0f;
 455
 456                                 /* ydnar: is this a sun? */
 457                                 _sun = ValueForKey( e, "_sun" );
 458                                 if( _sun[ 0 ] == '1' )
 459                                 {
 460                                         /* not a spot light */
 461                                         numSpotLights--;
 462
 463                                         /* unlink this light */
 464                                         lights = light->next;
 465
 466                                         /* make a sun */
 467                                         VectorScale( light->normal, -1.0f, sun.direction );
 468                                         VectorCopy( light->color, sun.color );
 469                                         sun.photons = (intensity / pointScale);
 470                                         sun.deviance = deviance / 180.0f * Q_PI;
 471                                         sun.numSamples = numSamples;
 472                                         sun.style = noStyles ? LS_NORMAL : light->style;
 473                                         sun.next = NULL;
 474
 475                                         /* make a sun light */
 476                                         CreateSunLight( &sun );
 477
 478                                         /* free original light */
 479                                         free( light );
 480                                         light = NULL;
 481
 482                                         /* skip the rest of this love story */
 483                                         continue;
 484                                 }
 485                         }
 486                 }
 487
 488                 /* jitter the light */
 489                 for( j = 1; j < numSamples; j++ )
 490                 {
 491                         /* create a light */
 492                         light2 = safe_malloc( sizeof( *light ) );
 493                         memcpy( light2, light, sizeof( *light ) );
 494                         light2->next = lights;
 495                         lights = light2;
 496
 497                         /* add to counts */
 498                         if( light->type == EMIT_SPOT )
 499                                 numSpotLights++;
 500                         else
 501                                 numPointLights++;
 502
 503                         /* jitter it */
 504                         light2->origin[ 0 ] = light->origin[ 0 ] + (Random() * 2.0f - 1.0f) * deviance;
 505                         light2->origin[ 1 ] = light->origin[ 1 ] + (Random() * 2.0f - 1.0f) * deviance;
 506                         light2->origin[ 2 ] = light->origin[ 2 ] + (Random() * 2.0f - 1.0f) * deviance;
 507                 }
 508         }
 509 }
 510
 511
 512
 513 /*
 514 CreateSurfaceLights() - ydnar
 515 this hijacks the radiosity code to generate surface lights for first pass
 516 */
 517
 518 #define APPROX_BOUNCE   1.0f
 519
 520 void CreateSurfaceLights( void )
 521 {
 522         int                                     i;
 523         bspDrawSurface_t        *ds;
 524         surfaceInfo_t           *info;
 525         shaderInfo_t            *si;
 526         light_t                         *light;
 527         float                           subdivide;
 528         vec3_t                          origin;
 529         clipWork_t                      cw;
 530         const char                      *nss;
 531
 532
 533         /* get sun shader supressor */
 534         nss = ValueForKey( &entities[ 0 ], "_noshadersun" );
 535
 536         /* walk the list of surfaces */
 537         for( i = 0; i < numBSPDrawSurfaces; i++ )
 538         {
 539                 /* get surface and other bits */
 540                 ds = &bspDrawSurfaces[ i ];
 541                 info = &surfaceInfos[ i ];
 542                 si = info->si;
 543
 544                 /* sunlight? */
 545                 if( si->sun != NULL && nss[ 0 ] != '1' )
 546                 {
 547                         Sys_FPrintf( SYS_VRB, "Sun: %s\n", si->shader );
 548                         CreateSunLight( si->sun );
 549                         si->sun = NULL; /* FIXME: leak! */
 550                 }
 551
 552                 /* sky light? */
 553                 if( si->skyLightValue > 0.0f )
 554                 {
 555                         Sys_FPrintf( SYS_VRB, "Sky: %s\n", si->shader );
 556                         CreateSkyLights( si->color, si->skyLightValue, si->skyLightIterations, si->lightFilterRadius, si->lightStyle );
 557                         si->skyLightValue = 0.0f;       /* FIXME: hack! */
 558                 }
 559
 560                 /* try to early out */
 561                 if( si->value <= 0 )
 562                         continue;
 563
 564                 /* autosprite shaders become point lights */
 565                 if( si->autosprite )
 566                 {
 567                         /* create an average xyz */
 568                         VectorAdd( info->mins, info->maxs, origin );
 569                         VectorScale( origin, 0.5f, origin );
 570
 571                         /* create a light */
 572                         light = safe_malloc( sizeof( *light ) );
 573                         memset( light, 0, sizeof( *light ) );
 574                         light->next = lights;
 575                         lights = light;
 576
 577                         /* set it up */
 578                         light->flags = LIGHT_Q3A_DEFAULT;
 579                         light->type = EMIT_POINT;
 580                         light->photons = si->value * pointScale;
 581                         light->fade = 1.0f;
 582                         light->si = si;
 583                         VectorCopy( origin, light->origin );
 584                         VectorCopy( si->color, light->color );
 585                         light->falloffTolerance = falloffTolerance;
 586                         light->style = si->lightStyle;
 587
 588                         /* add to point light count and continue */
 589                         numPointLights++;
 590                         continue;
 591                 }
 592
 593                 /* get subdivision amount */
 594                 if( si->lightSubdivide > 0 )
 595                         subdivide = si->lightSubdivide;
 596                 else
 597                         subdivide = defaultLightSubdivide;
 598
 599                 /* switch on type */
 600                 switch( ds->surfaceType )
 601                 {
 602                         case MST_PLANAR:
 603                         case MST_TRIANGLE_SOUP:
 604                                 RadLightForTriangles( i, 0, info->lm, si, APPROX_BOUNCE, subdivide, &cw );
 605                                 break;
 606
 607                         case MST_PATCH:
 608                                 RadLightForPatch( i, 0, info->lm, si, APPROX_BOUNCE, subdivide, &cw );
 609                                 break;
 610
 611                         default:
 612                                 break;
 613                 }
 614         }
 615 }
 616
 617
 618
 619 /*
 620 SetEntityOrigins()
 621 find the offset values for inline models
 622 */
 623
 624 void SetEntityOrigins( void )
 625 {
 626         int                                     i, j, k, f;
 627         entity_t                        *e;
 628         vec3_t                          origin;
 629         const char                      *key;
 630         int                                     modelnum;
 631         bspModel_t                      *dm;
 632         bspDrawSurface_t        *ds;
 633
 634
 635         /* ydnar: copy drawverts into private storage for nefarious purposes */
 636         yDrawVerts = safe_malloc( numBSPDrawVerts * sizeof( bspDrawVert_t ) );
 637         memcpy( yDrawVerts, bspDrawVerts, numBSPDrawVerts * sizeof( bspDrawVert_t ) );
 638
 639         /* set the entity origins */
 640         for( i = 0; i < numEntities; i++ )
 641         {
 642                 /* get entity and model */
 643                 e = &entities[ i ];
 644                 key = ValueForKey( e, "model" );
 645                 if( key[ 0 ] != '*' )
 646                         continue;
 647                 modelnum = atoi( key + 1 );
 648                 dm = &bspModels[ modelnum ];
 649
 650                 /* get entity origin */
 651                 key = ValueForKey( e, "origin" );
 652                 if( key[ 0 ] == '\0' )
 653                         continue;
 654                 GetVectorForKey( e, "origin", origin );
 655
 656                 /* set origin for all surfaces for this model */
 657                 for( j = 0; j < dm->numBSPSurfaces; j++ )
 658                 {
 659                         /* get drawsurf */
 660                         ds = &bspDrawSurfaces[ dm->firstBSPSurface + j ];
 661
 662                         /* set its verts */
 663                         for( k = 0; k < ds->numVerts; k++ )
 664                         {
 665                                 f = ds->firstVert + k;
 666                                 VectorAdd( origin, bspDrawVerts[ f ].xyz, yDrawVerts[ f ].xyz );
 667                         }
 668                 }
 669         }
 670 }
 671
 672
 673
 674 /*
 675 PointToPolygonFormFactor()
 676 calculates the area over a point/normal hemisphere a winding covers
 677 ydnar: fixme: there has to be a faster way to calculate this
 678 without the expensive per-vert sqrts and transcendental functions
 679 ydnar 2002-09-30: added -faster switch because only 19% deviance > 10%
 680 between this and the approximation
 681 */
 682
 683 #define ONE_OVER_2PI    0.159154942f    //% (1.0f / (2.0f * 3.141592657f))
 684
 685 float PointToPolygonFormFactor( const vec3_t point, const vec3_t normal, const winding_t *w )
 686 {
 687         vec3_t          triVector, triNormal;
 688         int                     i, j;
 689         vec3_t          dirs[ MAX_POINTS_ON_WINDING ];
 690         float           total;
 691         float           dot, angle, facing;
 692
 693
 694         /* this is expensive */
 695         for( i = 0; i < w->numpoints; i++ )
 696         {
 697                 VectorSubtract( w->p[ i ], point, dirs[ i ] );
 698                 VectorNormalize( dirs[ i ], dirs[ i ] );
 699         }
 700
 701         /* duplicate first vertex to avoid mod operation */
 702         VectorCopy( dirs[ 0 ], dirs[ i ] );
 703
 704         /* calculcate relative area */
 705         total = 0.0f;
 706         for( i = 0; i < w->numpoints; i++ )
 707         {
 708                 /* get a triangle */
 709                 j = i + 1;
 710                 dot = DotProduct( dirs[ i ], dirs[ j ] );
 711
 712                 /* roundoff can cause slight creep, which gives an IND from acos */
 713                 if( dot > 1.0f )
 714                         dot = 1.0f;
 715                 else if( dot < -1.0f )
 716                         dot = -1.0f;
 717
 718                 /* get the angle */
 719                 angle = acos( dot );
 720
 721                 CrossProduct( dirs[ i ], dirs[ j ], triVector );
 722                 if( VectorNormalize( triVector, triNormal ) < 0.0001f )
 723                         continue;
 724
 725                 facing = DotProduct( normal, triNormal );
 726                 total += facing * angle;
 727
 728                 /* ydnar: this was throwing too many errors with radiosity + crappy maps. ignoring it. */
 729                 if( total > 6.3f || total < -6.3f )
 730                         return 0.0f;
 731         }
 732
 733         /* now in the range of 0 to 1 over the entire incoming hemisphere */
 734         //%     total /= (2.0f * 3.141592657f);
 735         total *= ONE_OVER_2PI;
 736         return total;
 737 }
 738
 739
 740
 741 /*
 742 LightContributionTosample()
 743 determines the amount of light reaching a sample (luxel or vertex) from a given light
 744 */
 745
 746 int LightContributionToSample( trace_t *trace )
 747 {
 748         light_t                 *light;
 749         float                   angle;
 750         float                   add;
 751         float                   dist;
 752
 753
 754         /* get light */
 755         light = trace->light;
 756
 757         /* clear color */
 758         VectorClear( trace->color );
 759         VectorClear( trace->colorNoShadow );
 760
 761         /* ydnar: early out */
 762         if( !(light->flags & LIGHT_SURFACES) || light->envelope <= 0.0f )
 763                 return 0;
 764
 765         /* do some culling checks */
 766         if( light->type != EMIT_SUN )
 767         {
 768                 /* MrE: if the light is behind the surface */
 769                 if( trace->twoSided == qfalse )
 770                         if( DotProduct( light->origin, trace->normal ) - DotProduct( trace->origin, trace->normal ) < 0.0f )
 771                                 return 0;
 772
 773                 /* ydnar: test pvs */
 774                 if( !ClusterVisible( trace->cluster, light->cluster ) )
 775                         return 0;
 776         }
 777
 778         /* exact point to polygon form factor */
 779         if( light->type == EMIT_AREA )
 780         {
 781                 float           factor;
 782                 float           d;
 783                 vec3_t          pushedOrigin;
 784
 785                 /* project sample point into light plane */
 786                 d = DotProduct( trace->origin, light->normal ) - light->dist;
 787                 if( d < 3.0f )
 788                 {
 789                         /* sample point behind plane? */
 790                         if( !(light->flags & LIGHT_TWOSIDED) && d < -1.0f )
 791                                 return 0;
 792
 793                         /* sample plane coincident? */
 794                         if( d > -3.0f && DotProduct( trace->normal, light->normal ) > 0.9f )
 795                                 return 0;
 796                 }
 797
 798                 /* nudge the point so that it is clearly forward of the light */
 799                 /* so that surfaces meeting a light emiter don't get black edges */
 800                 if( d > -8.0f && d < 8.0f )
 801                         VectorMA( trace->origin, (8.0f - d), light->normal, pushedOrigin );
 802                 else
 803                         VectorCopy( trace->origin, pushedOrigin );
 804
 805                 /* get direction and distance */
 806                 VectorCopy( light->origin, trace->end );
 807                 dist = SetupTrace( trace );
 808                 if( dist >= light->envelope )
 809                         return 0;
 810
 811                 /* ptpff approximation */
 812                 if( faster )
 813                 {
 814                         /* angle attenuation */
 815                         angle = DotProduct( trace->normal, trace->direction );
 816
 817                         /* twosided lighting */
 818                         if( trace->twoSided )
 819                                 angle = fabs( angle );
 820
 821                         /* attenuate */
 822                         angle *= -DotProduct( light->normal, trace->direction );
 823                         if( angle == 0.0f )
 824                                 return 0;
 825                         else if( angle < 0.0f &&
 826                                 (trace->twoSided || (light->flags & LIGHT_TWOSIDED)) )
 827                                 angle = -angle;
 828
 829                         /* clamp the distance to prevent super hot spots */
 830                         dist = sqrt(dist * dist + light->extraDist * light->extraDist);
 831                         if( dist < 16.0f )
 832                                 dist = 16.0f;
 833
 834                         add = light->photons / (dist * dist) * angle;
 835                 }
 836                 else
 837                 {
 838                         /* calculate the contribution */
 839                         factor = PointToPolygonFormFactor( pushedOrigin, trace->normal, light->w );
 840                         if( factor == 0.0f )
 841                                 return 0;
 842                         else if( factor < 0.0f )
 843                         {
 844                                 /* twosided lighting */
 845                                 if( trace->twoSided || (light->flags & LIGHT_TWOSIDED) )
 846                                 {
 847                                         factor = -factor;
 848
 849                                         /* push light origin to other side of the plane */
 850                                         VectorMA( light->origin, -2.0f, light->normal, trace->end );
 851                                         dist = SetupTrace( trace );
 852                                         if( dist >= light->envelope )
 853                                                 return 0;
 854                                 }
 855                                 else
 856                                         return 0;
 857                         }
 858
 859                         /* ydnar: moved to here */
 860                         add = factor * light->add;
 861                 }
 862         }
 863
 864         /* point/spot lights */
 865         else if( light->type == EMIT_POINT || light->type == EMIT_SPOT )
 866         {
 867                 /* get direction and distance */
 868                 VectorCopy( light->origin, trace->end );
 869                 dist = SetupTrace( trace );
 870                 if( dist >= light->envelope )
 871                         return 0;
 872
 873                 /* clamp the distance to prevent super hot spots */
 874                 dist = sqrt(dist * dist + light->extraDist * light->extraDist);
 875                 if( dist < 16.0f )
 876                         dist = 16.0f;
 877
 878                 /* angle attenuation */
 879                 if( light->flags & LIGHT_ATTEN_ANGLE )
 880                 {
 881                         /* standard Lambert attenuation */
 882                         float dot = DotProduct( trace->normal, trace->direction );
 883
 884                         /* twosided lighting */
 885                         if( trace->twoSided )
 886                                 dot = fabs( dot );
 887
 888                         /* jal: optional half Lambert attenuation (http://developer.valvesoftware.com/wiki/Half_Lambert) */
 889                         if( lightAngleHL )
 890                         {
 891                                 if( dot > 0.001f ) // skip coplanar
 892                                 {
 893                                         if( dot > 1.0f ) dot = 1.0f;
 894                                         dot = ( dot * 0.5f ) + 0.5f;
 895                                         dot *= dot;
 896                                 }
 897                                 else
 898                                         dot = 0;
 899                         }
 900
 901                         angle = dot;
 902                 }
 903                 else
 904                         angle = 1.0f;
 905
 906                 if( light->angleScale != 0.0f )
 907                 {
 908                         angle /= light->angleScale;
 909                         if( angle > 1.0f )
 910                                 angle = 1.0f;
 911                 }
 912
 913                 /* attenuate */
 914                 if( light->flags & LIGHT_ATTEN_LINEAR )
 915                 {
 916                         add = angle * light->photons * linearScale - (dist * light->fade);
 917                         if( add < 0.0f )
 918                                 add = 0.0f;
 919                 }
 920                 else
 921                         add = (light->photons / (dist * dist)) * angle;
 922
 923                 /* handle spotlights */
 924                 if( light->type == EMIT_SPOT )
 925                 {
 926                         float   distByNormal, radiusAtDist, sampleRadius;
 927                         vec3_t  pointAtDist, distToSample;
 928
 929                         /* do cone calculation */
 930                         distByNormal = -DotProduct( trace->displacement, light->normal );
 931                         if( distByNormal < 0.0f )
 932                                 return 0;
 933                         VectorMA( light->origin, distByNormal, light->normal, pointAtDist );
 934                         radiusAtDist = light->radiusByDist * distByNormal;
 935                         VectorSubtract( trace->origin, pointAtDist, distToSample );
 936                         sampleRadius = VectorLength( distToSample );
 937
 938                         /* outside the cone */
 939                         if( sampleRadius >= radiusAtDist )
 940                                 return 0;
 941
 942                         /* attenuate */
 943                         if( sampleRadius > (radiusAtDist - 32.0f) )
 944                                 add *= ((radiusAtDist - sampleRadius) / 32.0f);
 945                 }
 946         }
 947
 948         /* ydnar: sunlight */
 949         else if( light->type == EMIT_SUN )
 950         {
 951                 /* get origin and direction */
 952                 VectorAdd( trace->origin, light->origin, trace->end );
 953                 dist = SetupTrace( trace );
 954
 955                 /* angle attenuation */
 956                 if( light->flags & LIGHT_ATTEN_ANGLE )
 957                 {
 958                         /* standard Lambert attenuation */
 959                         float dot = DotProduct( trace->normal, trace->direction );
 960
 961                         /* twosided lighting */
 962                         if( trace->twoSided )
 963                                 dot = fabs( dot );
 964
 965                         /* jal: optional half Lambert attenuation (http://developer.valvesoftware.com/wiki/Half_Lambert) */
 966                         if( lightAngleHL )
 967                         {
 968                                 if( dot > 0.001f ) // skip coplanar
 969                                 {
 970                                         if( dot > 1.0f ) dot = 1.0f;
 971                                         dot = ( dot * 0.5f ) + 0.5f;
 972                                         dot *= dot;
 973                                 }
 974                                 else
 975                                         dot = 0;
 976                         }
 977
 978                         angle = dot;
 979                 }
 980                 else
 981                         angle = 1.0f;
 982
 983                 /* attenuate */
 984                 add = light->photons * angle;
 985                 if( add <= 0.0f )
 986                         return 0;
 987
 988                 /* VorteX: set noShadow color */
 989                 VectorScale(light->color, add, trace->colorNoShadow);
 990
 991                 /* setup trace */
 992                 trace->testAll = qtrue;
 993                 VectorScale( light->color, add, trace->color );
 994
 995                 /* trace to point */
 996                 if( trace->testOcclusion && !trace->forceSunlight )
 997                 {
 998                         /* trace */
 999                         TraceLine( trace );
1000                         if( !(trace->compileFlags & C_SKY) || trace->opaque )
1001                         {
1002                                 VectorClear( trace->color );
1003                                 return -1;
1004                         }
1005                 }
1006
1007                 /* return to sender */
1008                 return 1;
1009         }
1010
1011         /* VorteX: set noShadow color */
1012         VectorScale(light->color, add, trace->colorNoShadow);
1013
1014         /* ydnar: changed to a variable number */
1015         if( add <= 0.0f || (add <= light->falloffTolerance && (light->flags & LIGHT_FAST_ACTUAL)) )
1016                 return 0;
1017
1018         /* setup trace */
1019         trace->testAll = qfalse;
1020         VectorScale( light->color, add, trace->color );
1021
1022         /* raytrace */
1023         TraceLine( trace );
1024         if( trace->passSolid || trace->opaque )
1025         {
1026                 VectorClear( trace->color );
1027                 return -1;
1028         }
1029
1030         /* return to sender */
1031         return 1;
1032 }
1033
1034
1035
1036 /*
1037 LightingAtSample()
1038 determines the amount of light reaching a sample (luxel or vertex)
1039 */
1040
1041 void LightingAtSample( trace_t *trace, byte styles[ MAX_LIGHTMAPS ], vec3_t colors[ MAX_LIGHTMAPS ] )
1042 {
1043         int                             i, lightmapNum;
1044
1045
1046         /* clear colors */
1047         for( lightmapNum = 0; lightmapNum < MAX_LIGHTMAPS; lightmapNum++ )
1048                 VectorClear( colors[ lightmapNum ] );
1049
1050         /* ydnar: normalmap */
1051         if( normalmap )
1052         {
1053                 colors[ 0 ][ 0 ] = (trace->normal[ 0 ] + 1.0f) * 127.5f;
1054                 colors[ 0 ][ 1 ] = (trace->normal[ 1 ] + 1.0f) * 127.5f;
1055                 colors[ 0 ][ 2 ] = (trace->normal[ 2 ] + 1.0f) * 127.5f;
1056                 return;
1057         }
1058
1059         /* ydnar: don't bounce ambient all the time */
1060         if( !bouncing )
1061                 VectorCopy( ambientColor, colors[ 0 ] );
1062
1063         /* ydnar: trace to all the list of lights pre-stored in tw */
1064         for( i = 0; i < trace->numLights && trace->lights[ i ] != NULL; i++ )
1065         {
1066                 /* set light */
1067                 trace->light = trace->lights[ i ];
1068
1069                 /* style check */
1070                 for( lightmapNum = 0; lightmapNum < MAX_LIGHTMAPS; lightmapNum++ )
1071                 {
1072                         if( styles[ lightmapNum ] == trace->light->style ||
1073                                 styles[ lightmapNum ] == LS_NONE )
1074                                 break;
1075                 }
1076
1077                 /* max of MAX_LIGHTMAPS (4) styles allowed to hit a sample */
1078                 if( lightmapNum >= MAX_LIGHTMAPS )
1079                         continue;
1080
1081                 /* sample light */
1082                 LightContributionToSample( trace );
1083                 if( trace->color[ 0 ] == 0.0f && trace->color[ 1 ] == 0.0f && trace->color[ 2 ] == 0.0f )
1084                         continue;
1085
1086                 /* handle negative light */
1087                 if( trace->light->flags & LIGHT_NEGATIVE )
1088                         VectorScale( trace->color, -1.0f, trace->color );
1089
1090                 /* set style */
1091                 styles[ lightmapNum ] = trace->light->style;
1092
1093                 /* add it */
1094                 VectorAdd( colors[ lightmapNum ], trace->color, colors[ lightmapNum ] );
1095
1096                 /* cheap mode */
1097                 if( cheap &&
1098                         colors[ 0 ][ 0 ] >= 255.0f &&
1099                         colors[ 0 ][ 1 ] >= 255.0f &&
1100                         colors[ 0 ][ 2 ] >= 255.0f )
1101                         break;
1102         }
1103 }
1104
1105
1106
1107 /*
1108 LightContributionToPoint()
1109 for a given light, how much light/color reaches a given point in space (with no facing)
1110 note: this is similar to LightContributionToSample() but optimized for omnidirectional sampling
1111 */
1112
1113 int LightContributionToPoint( trace_t *trace )
1114 {
1115         light_t         *light;
1116         float           add, dist;
1117
1118
1119         /* get light */
1120         light = trace->light;
1121
1122         /* clear color */
1123         VectorClear( trace->color );
1124
1125         /* ydnar: early out */
1126         if( !(light->flags & LIGHT_GRID) || light->envelope <= 0.0f )
1127                 return qfalse;
1128
1129         /* is this a sun? */
1130         if( light->type != EMIT_SUN )
1131         {
1132                 /* sun only? */
1133                 if( sunOnly )
1134                         return qfalse;
1135
1136                 /* test pvs */
1137                 if( !ClusterVisible( trace->cluster, light->cluster ) )
1138                         return qfalse;
1139         }
1140
1141         /* ydnar: check origin against light's pvs envelope */
1142         if( trace->origin[ 0 ] > light->maxs[ 0 ] || trace->origin[ 0 ] < light->mins[ 0 ] ||
1143                 trace->origin[ 1 ] > light->maxs[ 1 ] || trace->origin[ 1 ] < light->mins[ 1 ] ||
1144                 trace->origin[ 2 ] > light->maxs[ 2 ] || trace->origin[ 2 ] < light->mins[ 2 ] )
1145         {
1146                 gridBoundsCulled++;
1147                 return qfalse;
1148         }
1149
1150         /* set light origin */
1151         if( light->type == EMIT_SUN )
1152                 VectorAdd( trace->origin, light->origin, trace->end );
1153         else
1154                 VectorCopy( light->origin, trace->end );
1155
1156         /* set direction */
1157         dist = SetupTrace( trace );
1158
1159         /* test envelope */
1160         if( dist > light->envelope )
1161         {
1162                 gridEnvelopeCulled++;
1163                 return qfalse;
1164         }
1165
1166         /* ptpff approximation */
1167         if( light->type == EMIT_AREA && faster )
1168         {
1169                 /* clamp the distance to prevent super hot spots */
1170                 dist = sqrt(dist * dist + light->extraDist * light->extraDist);
1171                 if( dist < 16.0f )
1172                         dist = 16.0f;
1173
1174                 /* attenuate */
1175                 add = light->photons / (dist * dist);
1176         }
1177
1178         /* exact point to polygon form factor */
1179         else if( light->type == EMIT_AREA )
1180         {
1181                 float           factor, d;
1182                 vec3_t          pushedOrigin;
1183
1184
1185                 /* see if the point is behind the light */
1186                 d = DotProduct( trace->origin, light->normal ) - light->dist;
1187                 if( !(light->flags & LIGHT_TWOSIDED) && d < -1.0f )
1188                         return qfalse;
1189
1190                 /* nudge the point so that it is clearly forward of the light */
1191                 /* so that surfaces meeting a light emiter don't get black edges */
1192                 if( d > -8.0f && d < 8.0f )
1193                         VectorMA( trace->origin, (8.0f - d), light->normal, pushedOrigin );
1194                 else
1195                         VectorCopy( trace->origin, pushedOrigin );
1196
1197                 /* calculate the contribution (ydnar 2002-10-21: [bug 642] bad normal calc) */
1198                 factor = PointToPolygonFormFactor( pushedOrigin, trace->direction, light->w );
1199                 if( factor == 0.0f )
1200                         return qfalse;
1201                 else if( factor < 0.0f )
1202                 {
1203                         if( light->flags & LIGHT_TWOSIDED )
1204                                 factor = -factor;
1205                         else
1206                                 return qfalse;
1207                 }
1208
1209                 /* ydnar: moved to here */
1210                 add = factor * light->add;
1211         }
1212
1213         /* point/spot lights */
1214         else if( light->type == EMIT_POINT || light->type == EMIT_SPOT )
1215         {
1216                 /* clamp the distance to prevent super hot spots */
1217                 dist = sqrt(dist * dist + light->extraDist * light->extraDist);
1218                 if( dist < 16.0f )
1219                         dist = 16.0f;
1220
1221                 /* attenuate */
1222                 if( light->flags & LIGHT_ATTEN_LINEAR )
1223                 {
1224                         add = light->photons * linearScale - (dist * light->fade);
1225                         if( add < 0.0f )
1226                                 add = 0.0f;
1227                 }
1228                 else
1229                         add = light->photons / (dist * dist);
1230
1231                 /* handle spotlights */
1232                 if( light->type == EMIT_SPOT )
1233                 {
1234                         float   distByNormal, radiusAtDist, sampleRadius;
1235                         vec3_t  pointAtDist, distToSample;
1236
1237
1238                         /* do cone calculation */
1239                         distByNormal = -DotProduct( trace->displacement, light->normal );
1240                         if( distByNormal < 0.0f )
1241                                 return qfalse;
1242                         VectorMA( light->origin, distByNormal, light->normal, pointAtDist );
1243                         radiusAtDist = light->radiusByDist * distByNormal;
1244                         VectorSubtract( trace->origin, pointAtDist, distToSample );
1245                         sampleRadius = VectorLength( distToSample );
1246
1247                         /* outside the cone */
1248                         if( sampleRadius >= radiusAtDist )
1249                                 return qfalse;
1250
1251                         /* attenuate */
1252                         if( sampleRadius > (radiusAtDist - 32.0f) )
1253                                 add *= ((radiusAtDist - sampleRadius) / 32.0f);
1254                 }
1255         }
1256
1257         /* ydnar: sunlight */
1258         else if( light->type == EMIT_SUN )
1259         {
1260                 /* attenuate */
1261                 add = light->photons;
1262                 if( add <= 0.0f )
1263                         return qfalse;
1264
1265                 /* setup trace */
1266                 trace->testAll = qtrue;
1267                 VectorScale( light->color, add, trace->color );
1268
1269                 /* trace to point */
1270                 if( trace->testOcclusion && !trace->forceSunlight )
1271                 {
1272                         /* trace */
1273                         TraceLine( trace );
1274                         if( !(trace->compileFlags & C_SKY) || trace->opaque )
1275                         {
1276                                 VectorClear( trace->color );
1277                                 return -1;
1278                         }
1279                 }
1280
1281                 /* return to sender */
1282                 return qtrue;
1283         }
1284
1285         /* unknown light type */
1286         else
1287                 return qfalse;
1288
1289         /* ydnar: changed to a variable number */
1290         if( add <= 0.0f || (add <= light->falloffTolerance && (light->flags & LIGHT_FAST_ACTUAL)) )
1291                 return qfalse;
1292
1293         /* setup trace */
1294         trace->testAll = qfalse;
1295         VectorScale( light->color, add, trace->color );
1296
1297         /* trace */
1298         TraceLine( trace );
1299         if( trace->passSolid )
1300         {
1301                 VectorClear( trace->color );
1302                 return qfalse;
1303         }
1304
1305         /* we have a valid sample */
1306         return qtrue;
1307 }
1308
1309
1310
1311 /*
1312 TraceGrid()
1313 grid samples are for quickly determining the lighting
1314 of dynamically placed entities in the world
1315 */
1316
1317 #define MAX_CONTRIBUTIONS       32768
1318
1319 typedef struct
1320 {
1321         vec3_t          dir;
1322         vec3_t          color;
1323         int                     style;
1324 }
1325 contribution_t;
1326
1327 void TraceGrid( int num )
1328 {
1329         int                                             i, j, x, y, z, mod, numCon, numStyles;
1330         float                                   d, step;
1331         vec3_t                                  baseOrigin, cheapColor, color, thisdir;
1332         rawGridPoint_t                  *gp;
1333         bspGridPoint_t                  *bgp;
1334         contribution_t                  contributions[ MAX_CONTRIBUTIONS ];
1335         trace_t                                 trace;
1336
1337         /* get grid points */
1338         gp = &rawGridPoints[ num ];
1339         bgp = &bspGridPoints[ num ];
1340
1341         /* get grid origin */
1342         mod = num;
1343         z = mod / (gridBounds[ 0 ] * gridBounds[ 1 ]);
1344         mod -= z * (gridBounds[ 0 ] * gridBounds[ 1 ]);
1345         y = mod / gridBounds[ 0 ];
1346         mod -= y * gridBounds[ 0 ];
1347         x = mod;
1348
1349         trace.origin[ 0 ] = gridMins[ 0 ] + x * gridSize[ 0 ];
1350         trace.origin[ 1 ] = gridMins[ 1 ] + y * gridSize[ 1 ];
1351         trace.origin[ 2 ] = gridMins[ 2 ] + z * gridSize[ 2 ];
1352
1353         /* set inhibit sphere */
1354         if( gridSize[ 0 ] > gridSize[ 1 ] && gridSize[ 0 ] > gridSize[ 2 ] )
1355                 trace.inhibitRadius = gridSize[ 0 ] * 0.5f;
1356         else if( gridSize[ 1 ] > gridSize[ 0 ] && gridSize[ 1 ] > gridSize[ 2 ] )
1357                 trace.inhibitRadius = gridSize[ 1 ] * 0.5f;
1358         else
1359                 trace.inhibitRadius = gridSize[ 2 ] * 0.5f;
1360
1361         /* find point cluster */
1362         trace.cluster = ClusterForPointExt( trace.origin, GRID_EPSILON );
1363         if( trace.cluster < 0 )
1364         {
1365                 /* try to nudge the origin around to find a valid point */
1366                 VectorCopy( trace.origin, baseOrigin );
1367                 for( step = 0; (step += 0.005) <= 1.0; )
1368                 {
1369                         VectorCopy( baseOrigin, trace.origin );
1370                         trace.origin[ 0 ] += step * (Random() - 0.5) * gridSize[0];
1371                         trace.origin[ 1 ] += step * (Random() - 0.5) * gridSize[1];
1372                         trace.origin[ 2 ] += step * (Random() - 0.5) * gridSize[2];
1373
1374                         /* ydnar: changed to find cluster num */
1375                         trace.cluster = ClusterForPointExt( trace.origin, VERTEX_EPSILON );
1376                         if( trace.cluster >= 0 )
1377                                 break;
1378                 }
1379
1380                 /* can't find a valid point at all */
1381                 if( step > 1.0 )
1382                         return;
1383         }
1384
1385         /* setup trace */
1386         trace.testOcclusion = !noTrace;
1387         trace.forceSunlight = qfalse;
1388         trace.recvShadows = WORLDSPAWN_RECV_SHADOWS;
1389         trace.numSurfaces = 0;
1390         trace.surfaces = NULL;
1391         trace.numLights = 0;
1392         trace.lights = NULL;
1393
1394         /* clear */
1395         numCon = 0;
1396         VectorClear( cheapColor );
1397
1398         /* trace to all the lights, find the major light direction, and divide the
1399            total light between that along the direction and the remaining in the ambient */
1400         for( trace.light = lights; trace.light != NULL; trace.light = trace.light->next )
1401         {
1402                 float           addSize;
1403
1404
1405                 /* sample light */
1406                 if( !LightContributionToPoint( &trace ) )
1407                         continue;
1408
1409                 /* handle negative light */
1410                 if( trace.light->flags & LIGHT_NEGATIVE )
1411                         VectorScale( trace.color, -1.0f, trace.color );
1412
1413                 /* add a contribution */
1414                 VectorCopy( trace.color, contributions[ numCon ].color );
1415                 VectorCopy( trace.direction, contributions[ numCon ].dir );
1416                 contributions[ numCon ].style = trace.light->style;
1417                 numCon++;
1418
1419                 /* push average direction around */
1420                 addSize = VectorLength( trace.color );
1421                 VectorMA( gp->dir, addSize, trace.direction, gp->dir );
1422
1423                 /* stop after a while */
1424                 if( numCon >= (MAX_CONTRIBUTIONS - 1) )
1425                         break;
1426
1427                 /* ydnar: cheap mode */
1428                 VectorAdd( cheapColor, trace.color, cheapColor );
1429                 if( cheapgrid && cheapColor[ 0 ] >= 255.0f && cheapColor[ 1 ] >= 255.0f && cheapColor[ 2 ] >= 255.0f )
1430                         break;
1431         }
1432
1433         /////// Floodlighting for point //////////////////
1434         //do our floodlight ambient occlusion loop, and add a single contribution based on the brightest dir
1435         if (floodlighty)
1436         {
1437                 int q;
1438                 float addSize,f;
1439                 vec3_t col,dir;
1440                 col[0]=col[1]=col[2]=floodlightIntensity;
1441                 dir[0]=dir[1]=0;
1442                 dir[2]=1;
1443
1444                 trace.testOcclusion = qtrue;
1445                 trace.forceSunlight = qfalse;
1446                 trace.inhibitRadius = DEFAULT_INHIBIT_RADIUS;
1447                 trace.testAll = qtrue;
1448
1449                 for (q=0;q<2;q++)
1450                 {
1451                         if (q==0) //upper hemisphere
1452                         {
1453                                 trace.normal[0]=0;
1454                                 trace.normal[1]=0;
1455                                 trace.normal[2]=1;
1456                         }
1457                         else //lower hemisphere
1458                         {
1459                                 trace.normal[0]=0;
1460                                 trace.normal[1]=0;
1461                                 trace.normal[2]=-1;
1462                         }
1463
1464                         f = FloodLightForSample(&trace, floodlightDistance, floodlight_lowquality);
1465
1466                         contributions[ numCon ].color[0]=col[0]*f;
1467                         contributions[ numCon ].color[1]=col[1]*f;
1468                         contributions[ numCon ].color[2]=col[2]*f;
1469
1470                         contributions[ numCon ].dir[0]=dir[0];
1471                         contributions[ numCon ].dir[1]=dir[1];
1472                         contributions[ numCon ].dir[2]=dir[2];
1473
1474                         contributions[ numCon ].style = 0;
1475                         numCon++;
1476                         /* push average direction around */
1477                         addSize = VectorLength( col );
1478                         VectorMA( gp->dir, addSize, dir, gp->dir );
1479                 }
1480         }
1481         /////////////////////
1482
1483         /* normalize to get primary light direction */
1484         VectorNormalize( gp->dir, thisdir );
1485
1486         /* now that we have identified the primary light direction,
1487            go back and separate all the light into directed and ambient */
1488
1489         numStyles = 1;
1490         for( i = 0; i < numCon; i++ )
1491         {
1492                 /* get relative directed strength */
1493                 d = DotProduct( contributions[ i ].dir, thisdir );
1494                 /* we map 1 to gridDirectionality, and 0 to gridAmbientDirectionality */
1495                 d = gridAmbientDirectionality + d * (gridDirectionality - gridAmbientDirectionality);
1496                 if( d < 0.0f )
1497                         d = 0.0f;
1498
1499                 /* find appropriate style */
1500                 for( j = 0; j < numStyles; j++ )
1501                 {
1502                         if( gp->styles[ j ] == contributions[ i ].style )
1503                                 break;
1504                 }
1505
1506                 /* style not found? */
1507                 if( j >= numStyles )
1508                 {
1509                         /* add a new style */
1510                         if( numStyles < MAX_LIGHTMAPS )
1511                         {
1512                                 gp->styles[ numStyles ] = contributions[ i ].style;
1513                                 bgp->styles[ numStyles ] = contributions[ i ].style;
1514                                 numStyles++;
1515                                 //%     Sys_Printf( "(%d, %d) ", num, contributions[ i ].style );
1516                         }
1517
1518                         /* fallback */
1519                         else
1520                                 j = 0;
1521                 }
1522
1523                 /* add the directed color */
1524                 VectorMA( gp->directed[ j ], d, contributions[ i ].color, gp->directed[ j ] );
1525
1526                 /* ambient light will be at 1/4 the value of directed light */
1527                 /* (ydnar: nuke this in favor of more dramatic lighting?) */
1528                 /* (PM: how about actually making it work? d=1 when it got here for single lights/sun :P */
1529 //              d = 0.25f;
1530                 /* (Hobbes: always setting it to .25 is hardly any better) */
1531                 d = 0.25f * (1.0f - d);
1532                 VectorMA( gp->ambient[ j ], d, contributions[ i ].color, gp->ambient[ j ] );
1533
1534 /*
1535  * div0:
1536  * the total light average = ambient value + 0.25 * sum of all directional values
1537  * we can also get the total light average as 0.25 * the sum of all contributions
1538  *
1539  * 0.25 * sum(contribution_i) == ambient + 0.25 * sum(d_i contribution_i)
1540  *
1541  * THIS YIELDS:
1542  * ambient == 0.25 * sum((1 - d_i) contribution_i)
1543  *
1544  * So, 0.25f * (1.0f - d) IS RIGHT. If you want to tune it, tune d BEFORE.
1545  */
1546         }
1547
1548
1549         /* store off sample */
1550         for( i = 0; i < MAX_LIGHTMAPS; i++ )
1551         {
1552 #if 0
1553                 /* do some fudging to keep the ambient from being too low (2003-07-05: 0.25 -> 0.125) */
1554                 if( !bouncing )
1555                         VectorMA( gp->ambient[ i ], 0.125f, gp->directed[ i ], gp->ambient[ i ] );
1556 #endif
1557
1558                 /* set minimum light and copy off to bytes */
1559                 VectorCopy( gp->ambient[ i ], color );
1560                 for( j = 0; j < 3; j++ )
1561                         if( color[ j ] < minGridLight[ j ] )
1562                                 color[ j ] = minGridLight[ j ];
1563
1564                 /* vortex: apply gridscale and gridambientscale here */
1565                 ColorToBytes( color, bgp->ambient[ i ], gridScale*gridAmbientScale );
1566                 ColorToBytes( gp->directed[ i ], bgp->directed[ i ], gridScale );
1567         }
1568
1569         /* debug code */
1570         #if 0
1571                 //%     Sys_FPrintf( SYS_VRB, "%10d %10d %10d ", &gp->ambient[ 0 ][ 0 ], &gp->ambient[ 0 ][ 1 ], &gp->ambient[ 0 ][ 2 ] );
1572                 Sys_FPrintf( SYS_VRB, "%9d Amb: (%03.1f %03.1f %03.1f) Dir: (%03.1f %03.1f %03.1f)\n",
1573                         num,
1574                         gp->ambient[ 0 ][ 0 ], gp->ambient[ 0 ][ 1 ], gp->ambient[ 0 ][ 2 ],
1575                         gp->directed[ 0 ][ 0 ], gp->directed[ 0 ][ 1 ], gp->directed[ 0 ][ 2 ] );
1576         #endif
1577
1578         /* store direction */
1579         NormalToLatLong( thisdir, bgp->latLong );
1580 }
1581
1582
1583
1584 /*
1585 SetupGrid()
1586 calculates the size of the lightgrid and allocates memory
1587 */
1588
1589 void SetupGrid( void )
1590 {
1591         int                     i, j;
1592         vec3_t          maxs, oldGridSize;
1593         const char      *value;
1594         char            temp[ 64 ];
1595
1596
1597         /* don't do this if not grid lighting */
1598         if( noGridLighting )
1599                 return;
1600
1601         /* ydnar: set grid size */
1602         value = ValueForKey( &entities[ 0 ], "gridsize" );
1603         if( value[ 0 ] != '\0' )
1604                 sscanf( value, "%f %f %f", &gridSize[ 0 ], &gridSize[ 1 ], &gridSize[ 2 ] );
1605
1606         /* quantize it */
1607         VectorCopy( gridSize, oldGridSize );
1608         for( i = 0; i < 3; i++ )
1609                 gridSize[ i ] = gridSize[ i ] >= 8.0f ? floor( gridSize[ i ] ) : 8.0f;
1610
1611         /* ydnar: increase gridSize until grid count is smaller than max allowed */
1612         numRawGridPoints = MAX_MAP_LIGHTGRID + 1;
1613         j = 0;
1614         while( numRawGridPoints > MAX_MAP_LIGHTGRID )
1615         {
1616                 /* get world bounds */
1617                 for( i = 0; i < 3; i++ )
1618                 {
1619                         gridMins[ i ] = gridSize[ i ] * ceil( bspModels[ 0 ].mins[ i ] / gridSize[ i ] );
1620                         maxs[ i ] = gridSize[ i ] * floor( bspModels[ 0 ].maxs[ i ] / gridSize[ i ] );
1621                         gridBounds[ i ] = (maxs[ i ] - gridMins[ i ]) / gridSize[ i ] + 1;
1622                 }
1623
1624                 /* set grid size */
1625                 numRawGridPoints = gridBounds[ 0 ] * gridBounds[ 1 ] * gridBounds[ 2 ];
1626
1627                 /* increase grid size a bit */
1628                 if( numRawGridPoints > MAX_MAP_LIGHTGRID )
1629                         gridSize[ j++ % 3 ] += 16.0f;
1630         }
1631
1632         /* print it */
1633         Sys_Printf( "Grid size = { %1.0f, %1.0f, %1.0f }\n", gridSize[ 0 ], gridSize[ 1 ], gridSize[ 2 ] );
1634
1635         /* different? */
1636         if( !VectorCompare( gridSize, oldGridSize ) )
1637         {
1638                 sprintf( temp, "%.0f %.0f %.0f", gridSize[ 0 ], gridSize[ 1 ], gridSize[ 2 ] );
1639                 SetKeyValue( &entities[ 0 ], "gridsize", (const char*) temp );
1640                 Sys_FPrintf( SYS_VRB, "Storing adjusted grid size\n" );
1641         }
1642
1643         /* 2nd variable. fixme: is this silly? */
1644         numBSPGridPoints = numRawGridPoints;
1645
1646         /* allocate lightgrid */
1647         rawGridPoints = safe_malloc( numRawGridPoints * sizeof( *rawGridPoints ) );
1648         memset( rawGridPoints, 0, numRawGridPoints * sizeof( *rawGridPoints ) );
1649
1650         if( bspGridPoints != NULL )
1651                 free( bspGridPoints );
1652         bspGridPoints = safe_malloc( numBSPGridPoints * sizeof( *bspGridPoints ) );
1653         memset( bspGridPoints, 0, numBSPGridPoints * sizeof( *bspGridPoints ) );
1654
1655         /* clear lightgrid */
1656         for( i = 0; i < numRawGridPoints; i++ )
1657         {
1658                 VectorCopy( ambientColor, rawGridPoints[ i ].ambient[ j ] );
1659                 rawGridPoints[ i ].styles[ 0 ] = LS_NORMAL;
1660                 bspGridPoints[ i ].styles[ 0 ] = LS_NORMAL;
1661                 for( j = 1; j < MAX_LIGHTMAPS; j++ )
1662                 {
1663                         rawGridPoints[ i ].styles[ j ] = LS_NONE;
1664                         bspGridPoints[ i ].styles[ j ] = LS_NONE;
1665                 }
1666         }
1667
1668         /* note it */
1669         Sys_Printf( "%9d grid points\n", numRawGridPoints );
1670 }
1671
1672
1673
1674 /*
1675 LightWorld()
1676 does what it says...
1677 */
1678
1679 void LightWorld( void )
1680 {
1681         vec3_t          color;
1682         float           f;
1683         int                     b, bt;
1684         qboolean        minVertex, minGrid, ps;
1685         const char      *value;
1686
1687
1688         /* ydnar: smooth normals */
1689         if( shade )
1690         {
1691                 Sys_Printf( "--- SmoothNormals ---\n" );
1692                 SmoothNormals();
1693         }
1694
1695         /* determine the number of grid points */
1696         Sys_Printf( "--- SetupGrid ---\n" );
1697         SetupGrid();
1698
1699         /* find the optional minimum lighting values */
1700         GetVectorForKey( &entities[ 0 ], "_color", color );
1701         if( VectorLength( color ) == 0.0f )
1702                 VectorSet( color, 1.0, 1.0, 1.0 );
1703
1704         /* ambient */
1705         f = FloatForKey( &entities[ 0 ], "_ambient" );
1706         if( f == 0.0f )
1707                 f = FloatForKey( &entities[ 0 ], "ambient" );
1708         VectorScale( color, f, ambientColor );
1709
1710         /* minvertexlight */
1711         minVertex = qfalse;
1712         value = ValueForKey( &entities[ 0 ], "_minvertexlight" );
1713         if( value[ 0 ] != '\0' )
1714         {
1715                 minVertex = qtrue;
1716                 f = atof( value );
1717                 VectorScale( color, f, minVertexLight );
1718         }
1719
1720         /* mingridlight */
1721         minGrid = qfalse;
1722         value = ValueForKey( &entities[ 0 ], "_mingridlight" );
1723         if( value[ 0 ] != '\0' )
1724         {
1725                 minGrid = qtrue;
1726                 f = atof( value );
1727                 VectorScale( color, f, minGridLight );
1728         }
1729
1730         /* minlight */
1731         value = ValueForKey( &entities[ 0 ], "_minlight" );
1732         if( value[ 0 ] != '\0' )
1733         {
1734                 f = atof( value );
1735                 VectorScale( color, f, minLight );
1736                 if( minVertex == qfalse )
1737                         VectorScale( color, f, minVertexLight );
1738                 if( minGrid == qfalse )
1739                         VectorScale( color, f, minGridLight );
1740         }
1741
1742         /* create world lights */
1743         Sys_FPrintf( SYS_VRB, "--- CreateLights ---\n" );
1744         CreateEntityLights();
1745         CreateSurfaceLights();
1746         Sys_Printf( "%9d point lights\n", numPointLights );
1747         Sys_Printf( "%9d spotlights\n", numSpotLights );
1748         Sys_Printf( "%9d diffuse (area) lights\n", numDiffuseLights );
1749         Sys_Printf( "%9d sun/sky lights\n", numSunLights );
1750
1751         /* calculate lightgrid */
1752         if( !noGridLighting )
1753         {
1754                 /* ydnar: set up light envelopes */
1755                 SetupEnvelopes( qtrue, fastgrid );
1756
1757                 Sys_Printf( "--- TraceGrid ---\n" );
1758                 inGrid = qtrue;
1759                 RunThreadsOnIndividual( numRawGridPoints, qtrue, TraceGrid );
1760                 inGrid = qfalse;
1761                 Sys_Printf( "%d x %d x %d = %d grid\n",
1762                         gridBounds[ 0 ], gridBounds[ 1 ], gridBounds[ 2 ], numBSPGridPoints );
1763
1764                 /* ydnar: emit statistics on light culling */
1765                 Sys_FPrintf( SYS_VRB, "%9d grid points envelope culled\n", gridEnvelopeCulled );
1766                 Sys_FPrintf( SYS_VRB, "%9d grid points bounds culled\n", gridBoundsCulled );
1767         }
1768
1769         /* slight optimization to remove a sqrt */
1770         subdivideThreshold *= subdivideThreshold;
1771
1772         /* map the world luxels */
1773         Sys_Printf( "--- MapRawLightmap ---\n" );
1774         RunThreadsOnIndividual( numRawLightmaps, qtrue, MapRawLightmap );
1775         Sys_Printf( "%9d luxels\n", numLuxels );
1776         Sys_Printf( "%9d luxels mapped\n", numLuxelsMapped );
1777         Sys_Printf( "%9d luxels occluded\n", numLuxelsOccluded );
1778
1779         /* dirty them up */
1780         if( dirty )
1781         {
1782                 Sys_Printf( "--- DirtyRawLightmap ---\n" );
1783                 RunThreadsOnIndividual( numRawLightmaps, qtrue, DirtyRawLightmap );
1784         }
1785
1786         /* floodlight pass */
1787         FloodlightRawLightmaps();
1788
1789         /* ydnar: set up light envelopes */
1790         SetupEnvelopes( qfalse, fast );
1791
1792         /* light up my world */
1793         lightsPlaneCulled = 0;
1794         lightsEnvelopeCulled = 0;
1795         lightsBoundsCulled = 0;
1796         lightsClusterCulled = 0;
1797
1798         Sys_Printf( "--- IlluminateRawLightmap ---\n" );
1799         RunThreadsOnIndividual( numRawLightmaps, qtrue, IlluminateRawLightmap );
1800         Sys_Printf( "%9d luxels illuminated\n", numLuxelsIlluminated );
1801
1802         StitchSurfaceLightmaps();
1803
1804         Sys_Printf( "--- IlluminateVertexes ---\n" );
1805         RunThreadsOnIndividual( numBSPDrawSurfaces, qtrue, IlluminateVertexes );
1806         Sys_Printf( "%9d vertexes illuminated\n", numVertsIlluminated );
1807
1808         /* ydnar: emit statistics on light culling */
1809         Sys_FPrintf( SYS_VRB, "%9d lights plane culled\n", lightsPlaneCulled );
1810         Sys_FPrintf( SYS_VRB, "%9d lights envelope culled\n", lightsEnvelopeCulled );
1811         Sys_FPrintf( SYS_VRB, "%9d lights bounds culled\n", lightsBoundsCulled );
1812         Sys_FPrintf( SYS_VRB, "%9d lights cluster culled\n", lightsClusterCulled );
1813
1814         /* radiosity */
1815         b = 1;
1816         bt = bounce;
1817         while( bounce > 0 )
1818         {
1819                 /* store off the bsp between bounces */
1820                 StoreSurfaceLightmaps();
1821                 UnparseEntities();
1822                 Sys_Printf( "Writing %s\n", source );
1823                 WriteBSPFile( source );
1824
1825                 /* note it */
1826                 Sys_Printf( "\n--- Radiosity (bounce %d of %d) ---\n", b, bt );
1827
1828                 /* flag bouncing */
1829                 bouncing = qtrue;
1830                 VectorClear( ambientColor );
1831                 floodlighty = qfalse;
1832
1833                 /* generate diffuse lights */
1834                 RadFreeLights();
1835                 RadCreateDiffuseLights();
1836
1837                 /* setup light envelopes */
1838                 SetupEnvelopes( qfalse, fastbounce );
1839                 if( numLights == 0 )
1840                 {
1841                         Sys_Printf( "No diffuse light to calculate, ending radiosity.\n" );
1842                         break;
1843                 }
1844
1845                 /* add to lightgrid */
1846                 if( bouncegrid )
1847                 {
1848                         gridEnvelopeCulled = 0;
1849                         gridBoundsCulled = 0;
1850
1851                         Sys_Printf( "--- BounceGrid ---\n" );
1852                         inGrid = qtrue;
1853                         RunThreadsOnIndividual( numRawGridPoints, qtrue, TraceGrid );
1854                         inGrid = qfalse;
1855                         Sys_FPrintf( SYS_VRB, "%9d grid points envelope culled\n", gridEnvelopeCulled );
1856                         Sys_FPrintf( SYS_VRB, "%9d grid points bounds culled\n", gridBoundsCulled );
1857                 }
1858
1859                 /* light up my world */
1860                 lightsPlaneCulled = 0;
1861                 lightsEnvelopeCulled = 0;
1862                 lightsBoundsCulled = 0;
1863                 lightsClusterCulled = 0;
1864
1865                 Sys_Printf( "--- IlluminateRawLightmap ---\n" );
1866                 RunThreadsOnIndividual( numRawLightmaps, qtrue, IlluminateRawLightmap );
1867                 Sys_Printf( "%9d luxels illuminated\n", numLuxelsIlluminated );
1868                 Sys_Printf( "%9d vertexes illuminated\n", numVertsIlluminated );
1869
1870                 StitchSurfaceLightmaps();
1871
1872                 Sys_Printf( "--- IlluminateVertexes ---\n" );
1873                 RunThreadsOnIndividual( numBSPDrawSurfaces, qtrue, IlluminateVertexes );
1874                 Sys_Printf( "%9d vertexes illuminated\n", numVertsIlluminated );
1875
1876                 /* ydnar: emit statistics on light culling */
1877                 Sys_FPrintf( SYS_VRB, "%9d lights plane culled\n", lightsPlaneCulled );
1878                 Sys_FPrintf( SYS_VRB, "%9d lights envelope culled\n", lightsEnvelopeCulled );
1879                 Sys_FPrintf( SYS_VRB, "%9d lights bounds culled\n", lightsBoundsCulled );
1880                 Sys_FPrintf( SYS_VRB, "%9d lights cluster culled\n", lightsClusterCulled );
1881
1882                 /* interate */
1883                 bounce--;
1884                 b++;
1885         }
1886 }
1887
1888
1889
1890 /*
1891 LightMain()
1892 main routine for light processing
1893 */
1894
1895 int LightMain( int argc, char **argv )
1896 {
1897         int                     i;
1898         float           f;
1899         char            mapSource[ 1024 ];
1900         const char      *value;
1901         int lightmapMergeSize = 0;
1902
1903
1904         /* note it */
1905         Sys_Printf( "--- Light ---\n" );
1906         Sys_Printf( "--- ProcessGameSpecific ---\n" );
1907
1908         /* set standard game flags */
1909         wolfLight = game->wolfLight;
1910         if (wolfLight == qtrue)
1911                 Sys_Printf( " lightning model: wolf\n" );
1912         else
1913                 Sys_Printf( " lightning model: quake3\n" );
1914
1915         lmCustomSize = game->lightmapSize;
1916         Sys_Printf( " lightmap size: %d x %d pixels\n", lmCustomSize, lmCustomSize );
1917
1918         lightmapGamma = game->lightmapGamma;
1919         Sys_Printf( " lightning gamma: %f\n", lightmapGamma );
1920
1921         lightmapCompensate = game->lightmapCompensate;
1922         Sys_Printf( " lightning compensation: %f\n", lightmapCompensate );
1923
1924         lightmapExposure = game->lightmapExposure;
1925         Sys_Printf( " lightning exposure: %f\n", lightmapExposure );
1926
1927         gridScale = game->gridScale;
1928         Sys_Printf( " lightgrid scale: %f\n", gridScale );
1929
1930         gridAmbientScale = game->gridAmbientScale;
1931         Sys_Printf( " lightgrid ambient scale: %f\n", gridAmbientScale );
1932
1933         lightAngleHL = game->lightAngleHL;
1934         if( lightAngleHL )
1935                 Sys_Printf( " half lambert light angle attenuation enabled \n" );
1936
1937         noStyles = game->noStyles;
1938         if (noStyles == qtrue)
1939                 Sys_Printf( " shader lightstyles hack: disabled\n" );
1940         else
1941                 Sys_Printf( " shader lightstyles hack: enabled\n" );
1942
1943         keepLights = game->keepLights;
1944         if (keepLights == qtrue)
1945                 Sys_Printf( " keep lights: enabled\n" );
1946         else
1947                 Sys_Printf( " keep lights: disabled\n" );
1948
1949         patchShadows = game->patchShadows;
1950         if (patchShadows == qtrue)
1951                 Sys_Printf( " patch shadows: enabled\n" );
1952         else
1953                 Sys_Printf( " patch shadows: disabled\n" );
1954
1955         deluxemap = game->deluxeMap;
1956         deluxemode = game->deluxeMode;
1957         if (deluxemap == qtrue)
1958         {
1959                 if (deluxemode)
1960                         Sys_Printf( " deluxemapping: enabled with tangentspace deluxemaps\n" );
1961                 else
1962                         Sys_Printf( " deluxemapping: enabled with modelspace deluxemaps\n" );
1963         }
1964         else
1965                 Sys_Printf( " deluxemapping: disabled\n" );
1966
1967         Sys_Printf( "--- ProcessCommandLine ---\n" );
1968
1969         /* process commandline arguments */
1970         for( i = 1; i < (argc - 1); i++ )
1971         {
1972                 /* lightsource scaling */
1973                 if( !strcmp( argv[ i ], "-point" ) || !strcmp( argv[ i ], "-pointscale" ) )
1974                 {
1975                         f = atof( argv[ i + 1 ] );
1976                         pointScale *= f;
1977                         Sys_Printf( "Point (entity) light scaled by %f to %f\n", f, pointScale );
1978                         i++;
1979                 }
1980
1981                 else if( !strcmp( argv[ i ], "-area" ) || !strcmp( argv[ i ], "-areascale" ) )
1982                 {
1983                         f = atof( argv[ i + 1 ] );
1984                         areaScale *= f;
1985                         Sys_Printf( "Area (shader) light scaled by %f to %f\n", f, areaScale );
1986                         i++;
1987                 }
1988
1989                 else if( !strcmp( argv[ i ], "-sky" ) || !strcmp( argv[ i ], "-skyscale" ) )
1990                 {
1991                         f = atof( argv[ i + 1 ] );
1992                         skyScale *= f;
1993                         Sys_Printf( "Sky/sun light scaled by %f to %f\n", f, skyScale );
1994                         i++;
1995                 }
1996
1997                 else if( !strcmp( argv[ i ], "-bouncescale" ) )
1998                 {
1999                         f = atof( argv[ i + 1 ] );
2000                         bounceScale *= f;
2001                         Sys_Printf( "Bounce (radiosity) light scaled by %f to %f\n", f, bounceScale );
2002                         i++;
2003                 }
2004
2005                 else if( !strcmp( argv[ i ], "-scale" ) )
2006                 {
2007                         f = atof( argv[ i + 1 ] );
2008                         pointScale *= f;
2009                         areaScale *= f;
2010                         skyScale *= f;
2011                         bounceScale *= f;
2012                         Sys_Printf( "All light scaled by %f\n", f );
2013                         i++;
2014                 }
2015
2016                 else if( !strcmp( argv[ i ], "-gridscale" ) )
2017                 {
2018                         f = atof( argv[ i + 1 ] );
2019                         Sys_Printf( "Grid lightning scaled by %f\n", f );
2020                         gridScale *= f;
2021                         i++;
2022                 }
2023
2024                 else if( !strcmp( argv[ i ], "-gridambientscale" ) )
2025                 {
2026                         f = atof( argv[ i + 1 ] );
2027                         Sys_Printf( "Grid ambient lightning scaled by %f\n", f );
2028                         gridAmbientScale *= f;
2029                         i++;
2030                 }
2031
2032                 else if( !strcmp( argv[ i ], "-griddirectionality" ) )
2033                 {
2034                         f = atof( argv[ i + 1 ] );
2035                         if(f < 0) f = 0;
2036                         if(f > gridAmbientDirectionality) f = gridAmbientDirectionality;
2037                         Sys_Printf( "Grid directionality is %f\n", f );
2038                         gridDirectionality *= f;
2039                         i++;
2040                 }
2041
2042                 else if( !strcmp( argv[ i ], "-gridambientdirectionality" ) )
2043                 {
2044                         f = atof( argv[ i + 1 ] );
2045                         if(f > gridDirectionality) f = gridDirectionality;
2046                         if(f > 1) f = 1;
2047                         Sys_Printf( "Grid ambient directionality is %f\n", f );
2048                         gridAmbientDirectionality *= f;
2049                         i++;
2050                 }
2051
2052                 else if( !strcmp( argv[ i ], "-gamma" ) )
2053                 {
2054                         f = atof( argv[ i + 1 ] );
2055                         lightmapGamma = f;
2056                         Sys_Printf( "Lighting gamma set to %f\n", lightmapGamma );
2057                         i++;
2058                 }
2059
2060                 else if( !strcmp( argv[ i ], "-exposure" ) )
2061                 {
2062                         f = atof( argv[ i + 1 ] );
2063                         lightmapExposure = f;
2064                         Sys_Printf( "Lighting exposure set to %f\n", lightmapExposure );
2065                         i++;
2066                 }
2067
2068                 else if( !strcmp( argv[ i ], "-compensate" ) )
2069                 {
2070                         f = atof( argv[ i + 1 ] );
2071                         if( f <= 0.0f )
2072                                 f = 1.0f;
2073                         lightmapCompensate = f;
2074                         Sys_Printf( "Lighting compensation set to 1/%f\n", lightmapCompensate );
2075                         i++;
2076                 }
2077
2078                 /* ydnar switches */
2079                 else if( !strcmp( argv[ i ], "-bounce" ) )
2080                 {
2081                         bounce = atoi( argv[ i + 1 ] );
2082                         if( bounce < 0 )
2083                                 bounce = 0;
2084                         else if( bounce > 0 )
2085                                 Sys_Printf( "Radiosity enabled with %d bounce(s)\n", bounce );
2086                         i++;
2087                 }
2088
2089                 else if( !strcmp( argv[ i ], "-supersample" ) || !strcmp( argv[ i ], "-super" ) )
2090                 {
2091                         superSample = atoi( argv[ i + 1 ] );
2092                         if( superSample < 1 )
2093                                 superSample = 1;
2094                         else if( superSample > 1 )
2095                                 Sys_Printf( "Ordered-grid supersampling enabled with %d sample(s) per lightmap texel\n", (superSample * superSample) );
2096                         i++;
2097                 }
2098
2099                 else if( !strcmp( argv[ i ], "-samples" ) )
2100                 {
2101                         lightSamples = atoi( argv[ i + 1 ] );
2102                         if( lightSamples < 1 )
2103                                 lightSamples = 1;
2104                         else if( lightSamples > 1 )
2105                                 Sys_Printf( "Adaptive supersampling enabled with %d sample(s) per lightmap texel\n", lightSamples );
2106                         i++;
2107                 }
2108
2109                 else if( !strcmp( argv[ i ], "-filter" ) )
2110                 {
2111                         filter = qtrue;
2112                         Sys_Printf( "Lightmap filtering enabled\n" );
2113                 }
2114
2115                 else if( !strcmp( argv[ i ], "-dark" ) )
2116                 {
2117                         dark = qtrue;
2118                         Sys_Printf( "Dark lightmap seams enabled\n" );
2119                 }
2120
2121                 else if( !strcmp( argv[ i ], "-shadeangle" ) )
2122                 {
2123                         shadeAngleDegrees = atof( argv[ i + 1 ] );
2124                         if( shadeAngleDegrees < 0.0f )
2125                                 shadeAngleDegrees = 0.0f;
2126                         else if( shadeAngleDegrees > 0.0f )
2127                         {
2128                                 shade = qtrue;
2129                                 Sys_Printf( "Phong shading enabled with a breaking angle of %f degrees\n", shadeAngleDegrees );
2130                         }
2131                         i++;
2132                 }
2133
2134                 else if( !strcmp( argv[ i ], "-thresh" ) )
2135                 {
2136                         subdivideThreshold = atof( argv[ i + 1 ] );
2137                         if( subdivideThreshold < 0 )
2138                                 subdivideThreshold = DEFAULT_SUBDIVIDE_THRESHOLD;
2139                         else
2140                                 Sys_Printf( "Subdivision threshold set at %.3f\n", subdivideThreshold );
2141                         i++;
2142                 }
2143
2144                 else if( !strcmp( argv[ i ], "-approx" ) )
2145                 {
2146                         approximateTolerance = atoi( argv[ i + 1 ] );
2147                         if( approximateTolerance < 0 )
2148                                 approximateTolerance = 0;
2149                         else if( approximateTolerance > 0 )
2150                                 Sys_Printf( "Approximating lightmaps within a byte tolerance of %d\n", approximateTolerance );
2151                         i++;
2152                 }
2153                 else if( !strcmp( argv[ i ], "-deluxe" ) || !strcmp( argv[ i ], "-deluxemap" ) )
2154                 {
2155                         deluxemap = qtrue;
2156                         Sys_Printf( "Generating deluxemaps for average light direction\n" );
2157                 }
2158                 else if( !strcmp( argv[ i ], "-deluxemode" ))
2159                 {
2160                         deluxemode = atoi( argv[ i + 1 ] );
2161                         if (deluxemode == 0 || deluxemode > 1 || deluxemode < 0)
2162                         {
2163                                 Sys_Printf( "Generating modelspace deluxemaps\n" );
2164                                 deluxemode = 0;
2165                         }
2166                         else
2167                                 Sys_Printf( "Generating tangentspace deluxemaps\n" );
2168                         i++;
2169                 }
2170                 else if( !strcmp( argv[ i ], "-nodeluxe" ) || !strcmp( argv[ i ], "-nodeluxemap" ) )
2171                 {
2172                         deluxemap = qfalse;
2173                         Sys_Printf( "Disabling generating of deluxemaps for average light direction\n" );
2174                 }
2175                 else if( !strcmp( argv[ i ], "-external" ) )
2176                 {
2177                         externalLightmaps = qtrue;
2178                         Sys_Printf( "Storing all lightmaps externally\n" );
2179                 }
2180
2181                 else if( !strcmp( argv[ i ], "-lightmapsize" ) )
2182                 {
2183                         lmCustomSize = atoi( argv[ i + 1 ] );
2184
2185                         /* must be a power of 2 and greater than 2 */
2186                         if( ((lmCustomSize - 1) & lmCustomSize) || lmCustomSize < 2 )
2187                         {
2188                                 Sys_Printf( "WARNING: Lightmap size must be a power of 2, greater or equal to 2 pixels.\n" );
2189                                 lmCustomSize = game->lightmapSize;
2190                         }
2191                         i++;
2192                         Sys_Printf( "Default lightmap size set to %d x %d pixels\n", lmCustomSize, lmCustomSize );
2193
2194                         /* enable external lightmaps */
2195                         if( lmCustomSize != game->lightmapSize )
2196                         {
2197                                 externalLightmaps = qtrue;
2198                                 Sys_Printf( "Storing all lightmaps externally\n" );
2199                         }
2200                 }
2201
2202                 else if( !strcmp( argv[ i ], "-rawlightmapsizelimit" ) )
2203                 {
2204                         lmLimitSize = atoi( argv[ i + 1 ] );
2205
2206                         i++;
2207                         Sys_Printf( "Raw lightmap size limit set to %d x %d pixels\n", lmLimitSize, lmLimitSize );
2208                 }
2209
2210                 else if( !strcmp( argv[ i ], "-lightmapdir" ) )
2211                 {
2212                         lmCustomDir = argv[i + 1];
2213                         i++;
2214                         Sys_Printf( "Lightmap directory set to %s\n", lmCustomDir );
2215                         externalLightmaps = qtrue;
2216                         Sys_Printf( "Storing all lightmaps externally\n" );
2217                 }
2218
2219                 /* ydnar: add this to suppress warnings */
2220                 else if( !strcmp( argv[ i ],  "-custinfoparms") )
2221                 {
2222                         Sys_Printf( "Custom info parms enabled\n" );
2223                         useCustomInfoParms = qtrue;
2224                 }
2225
2226                 else if( !strcmp( argv[ i ], "-wolf" ) )
2227                 {
2228                         /* -game should already be set */
2229                         wolfLight = qtrue;
2230                         Sys_Printf( "Enabling Wolf lighting model (linear default)\n" );
2231                 }
2232
2233                 else if( !strcmp( argv[ i ], "-q3" ) )
2234                 {
2235                         /* -game should already be set */
2236                         wolfLight = qfalse;
2237                         Sys_Printf( "Enabling Quake 3 lighting model (nonlinear default)\n" );
2238                 }
2239
2240                 else if( !strcmp( argv[ i ], "-extradist" ) )
2241                 {
2242                         extraDist = atof( argv[ i + 1 ] );
2243                         if( extraDist < 0 )
2244                                 extraDist = 0;
2245                         i++;
2246                         Sys_Printf( "Default extra radius set to %f units\n", extraDist );
2247                 }
2248
2249                 else if( !strcmp( argv[ i ], "-sunonly" ) )
2250                 {
2251                         sunOnly = qtrue;
2252                         Sys_Printf( "Only computing sunlight\n" );
2253                 }
2254
2255                 else if( !strcmp( argv[ i ], "-bounceonly" ) )
2256                 {
2257                         bounceOnly = qtrue;
2258                         Sys_Printf( "Storing bounced light (radiosity) only\n" );
2259                 }
2260
2261                 else if( !strcmp( argv[ i ], "-nocollapse" ) )
2262                 {
2263                         noCollapse = qtrue;
2264                         Sys_Printf( "Identical lightmap collapsing disabled\n" );
2265                 }
2266
2267                 else if( !strcmp( argv[ i ], "-nolightmapsearch" ) )
2268                 {
2269                         lightmapSearchBlockSize = 1;
2270                         Sys_Printf( "No lightmap searching - all lightmaps will be sequential\n" );
2271                 }
2272
2273                 else if( !strcmp( argv[ i ], "-lightmapsearchpower" ) )
2274                 {
2275                         lightmapMergeSize = (game->lightmapSize << atoi(argv[i+1]));
2276                         ++i;
2277                         Sys_Printf( "Restricted lightmap searching enabled - optimize for lightmap merge power %d (size %d)\n", atoi(argv[i]), lightmapMergeSize );
2278                 }
2279
2280                 else if( !strcmp( argv[ i ], "-lightmapsearchblocksize" ) )
2281                 {
2282                         lightmapSearchBlockSize = atoi(argv[i+1]);
2283                         ++i;
2284                         Sys_Printf( "Restricted lightmap searching enabled - block size set to %d\n", lightmapSearchBlockSize );
2285                 }
2286
2287                 else if( !strcmp( argv[ i ], "-shade" ) )
2288                 {
2289                         shade = qtrue;
2290                         Sys_Printf( "Phong shading enabled\n" );
2291                 }
2292
2293                 else if( !strcmp( argv[ i ], "-bouncegrid") )
2294                 {
2295                         bouncegrid = qtrue;
2296                         if( bounce > 0 )
2297                                 Sys_Printf( "Grid lighting with radiosity enabled\n" );
2298                 }
2299
2300                 else if( !strcmp( argv[ i ], "-smooth" ) )
2301                 {
2302                         lightSamples = EXTRA_SCALE;
2303                         Sys_Printf( "The -smooth argument is deprecated, use \"-samples 2\" instead\n" );
2304                 }
2305
2306                 else if( !strcmp( argv[ i ], "-fast" ) )
2307                 {
2308                         fast = qtrue;
2309                         fastgrid = qtrue;
2310                         fastbounce = qtrue;
2311                         Sys_Printf( "Fast mode enabled\n" );
2312                 }
2313
2314                 else if( !strcmp( argv[ i ], "-faster" ) )
2315                 {
2316                         faster = qtrue;
2317                         fast = qtrue;
2318                         fastgrid = qtrue;
2319                         fastbounce = qtrue;
2320                         Sys_Printf( "Faster mode enabled\n" );
2321                 }
2322
2323                 else if( !strcmp( argv[ i ], "-fastgrid" ) )
2324                 {
2325                         fastgrid = qtrue;
2326                         Sys_Printf( "Fast grid lighting enabled\n" );
2327                 }
2328
2329                 else if( !strcmp( argv[ i ], "-fastbounce" ) )
2330                 {
2331                         fastbounce = qtrue;
2332                         Sys_Printf( "Fast bounce mode enabled\n" );
2333                 }
2334
2335                 else if( !strcmp( argv[ i ], "-cheap" ) )
2336                 {
2337                         cheap = qtrue;
2338                         cheapgrid = qtrue;
2339                         Sys_Printf( "Cheap mode enabled\n" );
2340                 }
2341
2342                 else if( !strcmp( argv[ i ], "-cheapgrid" ) )
2343                 {
2344                         cheapgrid = qtrue;
2345                         Sys_Printf( "Cheap grid mode enabled\n" );
2346                 }
2347
2348                 else if( !strcmp( argv[ i ], "-normalmap" ) )
2349                 {
2350                         normalmap = qtrue;
2351                         Sys_Printf( "Storing normal map instead of lightmap\n" );
2352                 }
2353
2354                 else if( !strcmp( argv[ i ], "-trisoup" ) )
2355                 {
2356                         trisoup = qtrue;
2357                         Sys_Printf( "Converting brush faces to triangle soup\n" );
2358                 }
2359
2360                 else if( !strcmp( argv[ i ], "-debug" ) )
2361                 {
2362                         debug = qtrue;
2363                         Sys_Printf( "Lightmap debugging enabled\n" );
2364                 }
2365
2366                 else if( !strcmp( argv[ i ], "-debugsurfaces" ) || !strcmp( argv[ i ], "-debugsurface" ) )
2367                 {
2368                         debugSurfaces = qtrue;
2369                         Sys_Printf( "Lightmap surface debugging enabled\n" );
2370                 }
2371
2372                 else if( !strcmp( argv[ i ], "-debugunused" ) )
2373                 {
2374                         debugUnused = qtrue;
2375                         Sys_Printf( "Unused luxel debugging enabled\n" );
2376                 }
2377
2378                 else if( !strcmp( argv[ i ], "-debugaxis" ) )
2379                 {
2380                         debugAxis = qtrue;
2381                         Sys_Printf( "Lightmap axis debugging enabled\n" );
2382                 }
2383
2384                 else if( !strcmp( argv[ i ], "-debugcluster" ) )
2385                 {
2386                         debugCluster = qtrue;
2387                         Sys_Printf( "Luxel cluster debugging enabled\n" );
2388                 }
2389
2390                 else if( !strcmp( argv[ i ], "-debugorigin" ) )
2391                 {
2392                         debugOrigin = qtrue;
2393                         Sys_Printf( "Luxel origin debugging enabled\n" );
2394                 }
2395
2396                 else if( !strcmp( argv[ i ], "-debugdeluxe" ) )
2397                 {
2398                         deluxemap = qtrue;
2399                         debugDeluxemap = qtrue;
2400                         Sys_Printf( "Deluxemap debugging enabled\n" );
2401                 }
2402
2403                 else if( !strcmp( argv[ i ], "-export" ) )
2404                 {
2405                         exportLightmaps = qtrue;
2406                         Sys_Printf( "Exporting lightmaps\n" );
2407                 }
2408
2409                 else if( !strcmp(argv[ i ], "-notrace" ))
2410                 {
2411                         noTrace = qtrue;
2412                         Sys_Printf( "Shadow occlusion disabled\n" );
2413                 }
2414                 else if( !strcmp(argv[ i ], "-patchshadows" ) )
2415                 {
2416                         patchShadows = qtrue;
2417                         Sys_Printf( "Patch shadow casting enabled\n" );
2418                 }
2419                 else if( !strcmp( argv[ i ], "-extra" ) )
2420                 {
2421                         superSample = EXTRA_SCALE;              /* ydnar */
2422                         Sys_Printf( "The -extra argument is deprecated, use \"-super 2\" instead\n" );
2423                 }
2424                 else if( !strcmp( argv[ i ], "-extrawide" ) )
2425                 {
2426                         superSample = EXTRAWIDE_SCALE;  /* ydnar */
2427                         filter = qtrue;                                 /* ydnar */
2428                         Sys_Printf( "The -extrawide argument is deprecated, use \"-filter [-super 2]\" instead\n");
2429                 }
2430                 else if( !strcmp( argv[ i ], "-samplesize" ) )
2431                 {
2432                         sampleSize = atoi( argv[ i + 1 ] );
2433                         if( sampleSize < 1 )
2434                                 sampleSize = 1;
2435                         i++;
2436                         Sys_Printf( "Default lightmap sample size set to %dx%d units\n", sampleSize, sampleSize );
2437                 }
2438                 else if( !strcmp( argv[ i ], "-minsamplesize" ) )
2439                 {
2440                         minSampleSize = atoi( argv[ i + 1 ] );
2441                         if( minSampleSize < 1 )
2442                                 minSampleSize = 1;
2443                         i++;
2444                         Sys_Printf( "Minimum lightmap sample size set to %dx%d units\n", minSampleSize, minSampleSize );
2445                 }
2446                 else if( !strcmp( argv[ i ],  "-samplescale" ) )
2447                 {
2448                         sampleScale = atoi( argv[ i + 1 ] );
2449                         i++;
2450                         Sys_Printf( "Lightmaps sample scale set to %d\n", sampleScale);
2451                 }
2452                 else if( !strcmp( argv[ i ], "-novertex" ) )
2453                 {
2454                         noVertexLighting = qtrue;
2455                         Sys_Printf( "Disabling vertex lighting\n" );
2456                 }
2457                 else if( !strcmp( argv[ i ], "-nogrid" ) )
2458                 {
2459                         noGridLighting = qtrue;
2460                         Sys_Printf( "Disabling grid lighting\n" );
2461                 }
2462                 else if( !strcmp( argv[ i ], "-border" ) )
2463                 {
2464                         lightmapBorder = qtrue;
2465                         Sys_Printf( "Adding debug border to lightmaps\n" );
2466                 }
2467                 else if( !strcmp( argv[ i ], "-nosurf" ) )
2468                 {
2469                         noSurfaces = qtrue;
2470                         Sys_Printf( "Not tracing against surfaces\n" );
2471                 }
2472                 else if( !strcmp( argv[ i ], "-dump" ) )
2473                 {
2474                         dump = qtrue;
2475                         Sys_Printf( "Dumping radiosity lights into numbered prefabs\n" );
2476                 }
2477                 else if( !strcmp( argv[ i ], "-lomem" ) )
2478                 {
2479                         loMem = qtrue;
2480                         Sys_Printf( "Enabling low-memory (potentially slower) lighting mode\n" );
2481                 }
2482                 else if( !strcmp( argv[ i ], "-lightanglehl" ) )
2483                 {
2484                         if( ( atoi( argv[ i + 1 ] ) != 0 ) != lightAngleHL )
2485                         {
2486                                 lightAngleHL = ( atoi( argv[ i + 1 ] ) != 0 );
2487                                 if( lightAngleHL )
2488                                         Sys_Printf( "Enabling half lambert light angle attenuation\n" );
2489                                 else
2490                                         Sys_Printf( "Disabling half lambert light angle attenuation\n" );
2491                         }
2492                 }
2493                 else if( !strcmp( argv[ i ], "-nostyle" ) || !strcmp( argv[ i ], "-nostyles" ) )
2494                 {
2495                         noStyles = qtrue;
2496                         Sys_Printf( "Disabling lightstyles\n" );
2497                 }
2498                 else if( !strcmp( argv[ i ], "-style" ) || !strcmp( argv[ i ], "-styles" ) )
2499                 {
2500                         noStyles = qfalse;
2501                         Sys_Printf( "Enabling lightstyles\n" );
2502                 }
2503                 else if( !strcmp( argv[ i ], "-keeplights" ))
2504                 {
2505                         keepLights = qtrue;
2506                         Sys_Printf( "Leaving light entities on map after compile\n" );
2507                 }
2508                 else if( !strcmp( argv[ i ], "-cpma" ) )
2509                 {
2510                         cpmaHack = qtrue;
2511                         Sys_Printf( "Enabling Challenge Pro Mode Asstacular Vertex Lighting Mode (tm)\n" );
2512                 }
2513                 else if( !strcmp( argv[ i ], "-floodlight" ) )
2514                 {
2515                         floodlighty = qtrue;
2516                         Sys_Printf( "FloodLighting enabled\n" );
2517                 }
2518                 else if( !strcmp( argv[ i ], "-debugnormals" ) )
2519                 {
2520                         debugnormals = qtrue;
2521                         Sys_Printf( "DebugNormals enabled\n" );
2522                 }
2523                 else if( !strcmp( argv[ i ], "-lowquality" ) )
2524                 {
2525                         floodlight_lowquality = qtrue;
2526                         Sys_Printf( "Low Quality FloodLighting enabled\n" );
2527                 }
2528
2529                 /* r7: dirtmapping */
2530                 else if( !strcmp( argv[ i ], "-dirty" ) )
2531                 {
2532                         dirty = qtrue;
2533                         Sys_Printf( "Dirtmapping enabled\n" );
2534                 }
2535                 else if( !strcmp( argv[ i ], "-dirtdebug" ) || !strcmp( argv[ i ], "-debugdirt" ) )
2536                 {
2537                         dirtDebug = qtrue;
2538                         Sys_Printf( "Dirtmap debugging enabled\n" );
2539                 }
2540                 else if( !strcmp( argv[ i ], "-dirtmode" ) )
2541                 {
2542                         dirtMode = atoi( argv[ i + 1 ] );
2543                         if( dirtMode != 0 && dirtMode != 1 )
2544                                 dirtMode = 0;
2545                         if( dirtMode == 1 )
2546                                 Sys_Printf( "Enabling randomized dirtmapping\n" );
2547                         else
2548                                 Sys_Printf( "Enabling ordered dir mapping\n" );
2549                         i++;
2550                 }
2551                 else if( !strcmp( argv[ i ], "-dirtdepth" ) )
2552                 {
2553                         dirtDepth = atof( argv[ i + 1 ] );
2554                         if( dirtDepth <= 0.0f )
2555                                 dirtDepth = 128.0f;
2556                         Sys_Printf( "Dirtmapping depth set to %.1f\n", dirtDepth );
2557                         i++;
2558                 }
2559                 else if( !strcmp( argv[ i ], "-dirtscale" ) )
2560                 {
2561                         dirtScale = atof( argv[ i + 1 ] );
2562                         if( dirtScale <= 0.0f )
2563                                 dirtScale = 1.0f;
2564                         Sys_Printf( "Dirtmapping scale set to %.1f\n", dirtScale );
2565                         i++;
2566                 }
2567                 else if( !strcmp( argv[ i ], "-dirtgain" ) )
2568                 {
2569                         dirtGain = atof( argv[ i + 1 ] );
2570                         if( dirtGain <= 0.0f )
2571                                 dirtGain = 1.0f;
2572                         Sys_Printf( "Dirtmapping gain set to %.1f\n", dirtGain );
2573                         i++;
2574                 }
2575                 else if( !strcmp( argv[ i ], "-trianglecheck" ) )
2576                 {
2577                         lightmapTriangleCheck = qtrue;
2578                 }
2579                 else if( !strcmp( argv[ i ], "-extravisnudge" ) )
2580                 {
2581                         lightmapExtraVisClusterNudge = qtrue;
2582                 }
2583                 /* unhandled args */
2584                 else
2585                 {
2586                         Sys_Printf( "WARNING: Unknown argument \"%s\"\n", argv[ i ] );
2587                 }
2588
2589         }
2590
2591         /* fix up lightmap search power */
2592         if(lightmapMergeSize)
2593         {
2594                 lightmapSearchBlockSize = (lightmapMergeSize / lmCustomSize) * (lightmapMergeSize / lmCustomSize);
2595                 if(lightmapSearchBlockSize < 1)
2596                         lightmapSearchBlockSize = 1;
2597
2598                 Sys_Printf( "Restricted lightmap searching enabled - block size adjusted to %d\n", lightmapSearchBlockSize );
2599         }
2600
2601         /* clean up map name */
2602         strcpy( source, ExpandArg( argv[ i ] ) );
2603         StripExtension( source );
2604         DefaultExtension( source, ".bsp" );
2605         strcpy( mapSource, ExpandArg( argv[ i ] ) );
2606         StripExtension( mapSource );
2607         DefaultExtension( mapSource, ".map" );
2608
2609         /* ydnar: set default sample size */
2610         SetDefaultSampleSize( sampleSize );
2611
2612         /* ydnar: handle shaders */
2613         BeginMapShaderFile( source );
2614         LoadShaderInfo();
2615
2616         /* note loading */
2617         Sys_Printf( "Loading %s\n", source );
2618
2619         /* ydnar: load surface file */
2620         LoadSurfaceExtraFile( source );
2621
2622         /* load bsp file */
2623         LoadBSPFile( source );
2624
2625         /* parse bsp entities */
2626         ParseEntities();
2627
2628         /* inject command line parameters */
2629         InjectCommandLine(argv, 0, argc - 1);
2630
2631         /* load map file */
2632         value = ValueForKey( &entities[ 0 ], "_keepLights" );
2633         if( value[ 0 ] != '1' )
2634                 LoadMapFile( mapSource, qtrue );
2635
2636         /* set the entity/model origins and init yDrawVerts */
2637         SetEntityOrigins();
2638
2639         /* ydnar: set up optimization */
2640         SetupBrushes();
2641         SetupDirt();
2642         SetupFloodLight();
2643         SetupSurfaceLightmaps();
2644
2645         /* initialize the surface facet tracing */
2646         SetupTraceNodes();
2647
2648         /* light the world */
2649         LightWorld();
2650
2651         /* ydnar: store off lightmaps */
2652         StoreSurfaceLightmaps();
2653
2654         /* write out the bsp */
2655         UnparseEntities();
2656         Sys_Printf( "Writing %s\n", source );
2657         WriteBSPFile( source );
2658
2659         /* ydnar: export lightmaps */
2660         if( exportLightmaps && !externalLightmaps )
2661                 ExportLightmaps();
2662
2663         /* return to sender */
2664         return 0;
2665 }
2666