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         int i;
  48         float photons, d, angle, elevation, da, de;
  49         vec3_t direction;
  50         light_t     *light;
  51
  52
  53         /* dummy check */
  54         if ( sun == NULL ) {
  55                 return;
  56         }
  57
  58         /* fixup */
  59         if ( sun->numSamples < 1 ) {
  60                 sun->numSamples = 1;
  61         }
  62
  63         /* set photons */
  64         photons = sun->photons / sun->numSamples;
  65
  66         /* create the right number of suns */
  67         for ( i = 0; i < sun->numSamples; i++ )
  68         {
  69                 /* calculate sun direction */
  70                 if ( i == 0 ) {
  71                         VectorCopy( sun->direction, direction );
  72                 }
  73                 else
  74                 {
  75                         /*
  76                             sun->direction[ 0 ] = cos( angle ) * cos( elevation );
  77                             sun->direction[ 1 ] = sin( angle ) * cos( elevation );
  78                             sun->direction[ 2 ] = sin( elevation );
  79
  80                             xz_dist   = sqrt( x*x + z*z )
  81                             latitude  = atan2( xz_dist, y ) * RADIANS
  82                             longitude = atan2( x,       z ) * RADIANS
  83                          */
  84
  85                         d = sqrt( sun->direction[ 0 ] * sun->direction[ 0 ] + sun->direction[ 1 ] * sun->direction[ 1 ] );
  86                         angle = atan2( sun->direction[ 1 ], sun->direction[ 0 ] );
  87                         elevation = atan2( sun->direction[ 2 ], d );
  88
  89                         /* jitter the angles (loop to keep random sample within sun->deviance steridians) */
  90                         do
  91                         {
  92                                 da = ( Random() * 2.0f - 1.0f ) * sun->deviance;
  93                                 de = ( Random() * 2.0f - 1.0f ) * sun->deviance;
  94                         }
  95                         while ( ( da * da + de * de ) > ( sun->deviance * sun->deviance ) );
  96                         angle += da;
  97                         elevation += de;
  98
  99                         /* debug code */
 100                         //%     Sys_Printf( "%d: Angle: %3.4f Elevation: %3.3f\n", sun->numSamples, (angle / Q_PI * 180.0f), (elevation / Q_PI * 180.0f) );
 101
 102                         /* create new vector */
 103                         direction[ 0 ] = cos( angle ) * cos( elevation );
 104                         direction[ 1 ] = sin( angle ) * cos( elevation );
 105                         direction[ 2 ] = sin( elevation );
 106                 }
 107
 108                 /* create a light */
 109                 numSunLights++;
 110                 light = safe_malloc( sizeof( *light ) );
 111                 memset( light, 0, sizeof( *light ) );
 112                 light->next = lights;
 113                 lights = light;
 114
 115                 /* initialize the light */
 116                 light->flags = LIGHT_SUN_DEFAULT;
 117                 light->type = EMIT_SUN;
 118                 light->fade = 1.0f;
 119                 light->falloffTolerance = falloffTolerance;
 120                 light->filterRadius = sun->filterRadius / sun->numSamples;
 121                 light->style = noStyles ? LS_NORMAL : sun->style;
 122
 123                 /* set the light's position out to infinity */
 124                 VectorMA( vec3_origin, ( MAX_WORLD_COORD * 8.0f ), direction, light->origin );    /* MAX_WORLD_COORD * 2.0f */
 125
 126                 /* set the facing to be the inverse of the sun direction */
 127                 VectorScale( direction, -1.0, light->normal );
 128                 light->dist = DotProduct( light->origin, light->normal );
 129
 130                 /* set color and photons */
 131                 VectorCopy( sun->color, light->color );
 132                 light->photons = photons * skyScale;
 133         }
 134
 135         /* another sun? */
 136         if ( sun->next != NULL ) {
 137                 CreateSunLight( sun->next );
 138         }
 139 }
 140
 141
 142
 143 /*
 144    CreateSkyLights() - ydnar
 145    simulates sky light with multiple suns
 146  */
 147
 148 static void CreateSkyLights( vec3_t color, float value, int iterations, float filterRadius, int style ){
 149         int i, j, numSuns;
 150         int angleSteps, elevationSteps;
 151         float angle, elevation;
 152         float angleStep, elevationStep;
 153         sun_t sun;
 154
 155
 156         /* dummy check */
 157         if ( value <= 0.0f || iterations < 2 ) {
 158                 return;
 159         }
 160
 161         /* basic sun setup */
 162         VectorCopy( color, sun.color );
 163         sun.deviance = 0.0f;
 164         sun.filterRadius = filterRadius;
 165         sun.numSamples = 1;
 166         sun.style = noStyles ? LS_NORMAL : style;
 167         sun.next = NULL;
 168
 169         /* setup */
 170         elevationSteps = iterations - 1;
 171         angleSteps = elevationSteps * 4;
 172         angle = 0.0f;
 173         elevationStep = DEG2RAD( 90.0f / iterations );  /* skip elevation 0 */
 174         angleStep = DEG2RAD( 360.0f / angleSteps );
 175
 176         /* calc individual sun brightness */
 177         numSuns = angleSteps * elevationSteps + 1;
 178         sun.photons = value / numSuns;
 179
 180         /* iterate elevation */
 181         elevation = elevationStep * 0.5f;
 182         angle = 0.0f;
 183         for ( i = 0, elevation = elevationStep * 0.5f; i < elevationSteps; i++ )
 184         {
 185                 /* iterate angle */
 186                 for ( j = 0; j < angleSteps; j++ )
 187                 {
 188                         /* create sun */
 189                         sun.direction[ 0 ] = cos( angle ) * cos( elevation );
 190                         sun.direction[ 1 ] = sin( angle ) * cos( elevation );
 191                         sun.direction[ 2 ] = sin( elevation );
 192                         CreateSunLight( &sun );
 193
 194                         /* move */
 195                         angle += angleStep;
 196                 }
 197
 198                 /* move */
 199                 elevation += elevationStep;
 200                 angle += angleStep / elevationSteps;
 201         }
 202
 203         /* create vertical sun */
 204         VectorSet( sun.direction, 0.0f, 0.0f, 1.0f );
 205         CreateSunLight( &sun );
 206
 207         /* short circuit */
 208         return;
 209 }
 210
 211
 212
 213 /*
 214    CreateEntityLights()
 215    creates lights from light entities
 216  */
 217
 218 void CreateEntityLights( void ){
 219         int i, j;
 220         light_t         *light, *light2;
 221         entity_t        *e, *e2;
 222         const char      *name;
 223         const char      *target;
 224         vec3_t dest;
 225         const char      *_color;
 226         float intensity, scale, deviance, filterRadius;
 227         int spawnflags, flags, numSamples;
 228         qboolean junior;
 229
 230
 231         /* go throught entity list and find lights */
 232         for ( i = 0; i < numEntities; i++ )
 233         {
 234                 /* get entity */
 235                 e = &entities[ i ];
 236                 name = ValueForKey( e, "classname" );
 237
 238                 /* ydnar: check for lightJunior */
 239                 if ( Q_strncasecmp( name, "lightJunior", 11 ) == 0 ) {
 240                         junior = qtrue;
 241                 }
 242                 else if ( Q_strncasecmp( name, "light", 5 ) == 0 ) {
 243                         junior = qfalse;
 244                 }
 245                 else{
 246                         continue;
 247                 }
 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
 255                 /* create a light */
 256                 numPointLights++;
 257                 light = safe_malloc( sizeof( *light ) );
 258                 memset( light, 0, sizeof( *light ) );
 259                 light->next = lights;
 260                 lights = light;
 261
 262                 /* handle spawnflags */
 263                 spawnflags = IntForKey( e, "spawnflags" );
 264
 265                 /* ydnar: quake 3+ light behavior */
 266                 if ( wolfLight == qfalse ) {
 267                         /* set default flags */
 268                         flags = LIGHT_Q3A_DEFAULT;
 269
 270                         /* linear attenuation? */
 271                         if ( spawnflags & 1 ) {
 272                                 flags |= LIGHT_ATTEN_LINEAR;
 273                                 flags &= ~LIGHT_ATTEN_ANGLE;
 274                         }
 275
 276                         /* no angle attenuate? */
 277                         if ( spawnflags & 2 ) {
 278                                 flags &= ~LIGHT_ATTEN_ANGLE;
 279                         }
 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                                 flags &= ~LIGHT_ATTEN_LINEAR;
 291                                 flags |= LIGHT_ATTEN_ANGLE;
 292                         }
 293
 294                         /* angle attenuate? */
 295                         if ( spawnflags & 2 ) {
 296                                 flags |= LIGHT_ATTEN_ANGLE;
 297                         }
 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
 307                 /* nogrid? */
 308                 if ( spawnflags & 16 ) {
 309                         flags &= ~LIGHT_GRID;
 310                 }
 311
 312                 /* junior? */
 313                 if ( junior ) {
 314                         flags |= LIGHT_GRID;
 315                         flags &= ~LIGHT_SURFACES;
 316                 }
 317
 318                 /* vortex: unnormalized? */
 319                 if ( spawnflags & 32 ) {
 320                         flags |= LIGHT_UNNORMALIZED;
 321                 }
 322
 323                 /* vortex: distance atten? */
 324                 if ( spawnflags & 64 ) {
 325                         flags |= LIGHT_ATTEN_DISTANCE;
 326                 }
 327
 328                 /* store the flags */
 329                 light->flags = flags;
 330
 331                 /* ydnar: set fade key (from wolf) */
 332                 light->fade = 1.0f;
 333                 if ( light->flags & LIGHT_ATTEN_LINEAR ) {
 334                         light->fade = FloatForKey( e, "fade" );
 335                         if ( light->fade == 0.0f ) {
 336                                 light->fade = 1.0f;
 337                         }
 338                 }
 339
 340                 /* ydnar: set angle scaling (from vlight) */
 341                 light->angleScale = FloatForKey( e, "_anglescale" );
 342                 if ( light->angleScale != 0.0f ) {
 343                         light->flags |= LIGHT_ATTEN_ANGLE;
 344                 }
 345
 346                 /* set origin */
 347                 GetVectorForKey( e, "origin", light->origin );
 348                 light->style = IntForKey( e, "_style" );
 349                 if ( light->style == LS_NORMAL ) {
 350                         light->style = IntForKey( e, "style" );
 351                 }
 352                 if ( light->style < LS_NORMAL || light->style >= LS_NONE ) {
 353                         Error( "Invalid lightstyle (%d) on entity %d", light->style, i );
 354                 }
 355
 356                 if ( light->style != LS_NORMAL ) {
 357                         Sys_FPrintf( SYS_WRN, "WARNING: Styled light found targeting %s\n **", target );
 358                 }
 359
 360                 /* set light intensity */
 361                 intensity = FloatForKey( e, "_light" );
 362                 if ( intensity == 0.0f ) {
 363                         intensity = FloatForKey( e, "light" );
 364                 }
 365                 if ( intensity == 0.0f ) {
 366                         intensity = 300.0f;
 367                 }
 368
 369                 /* ydnar: set light scale (sof2) */
 370                 scale = FloatForKey( e, "scale" );
 371                 if ( scale == 0.0f ) {
 372                         scale = 1.0f;
 373                 }
 374                 intensity *= scale;
 375
 376                 /* ydnar: get deviance and samples */
 377                 deviance = FloatForKey( e, "_deviance" );
 378                 if ( deviance == 0.0f ) {
 379                         deviance = FloatForKey( e, "_deviation" );
 380                 }
 381                 if ( deviance == 0.0f ) {
 382                         deviance = FloatForKey( e, "_jitter" );
 383                 }
 384                 numSamples = IntForKey( e, "_samples" );
 385                 if ( deviance < 0.0f || numSamples < 1 ) {
 386                         deviance = 0.0f;
 387                         numSamples = 1;
 388                 }
 389                 intensity /= numSamples;
 390
 391                 /* ydnar: get filter radius */
 392                 filterRadius = FloatForKey( e, "_filterradius" );
 393                 if ( filterRadius == 0.0f ) {
 394                         filterRadius = FloatForKey( e, "_filteradius" );
 395                 }
 396                 if ( filterRadius == 0.0f ) {
 397                         filterRadius = FloatForKey( e, "_filter" );
 398                 }
 399                 if ( filterRadius < 0.0f ) {
 400                         filterRadius = 0.0f;
 401                 }
 402                 light->filterRadius = filterRadius;
 403
 404                 /* set light color */
 405                 _color = ValueForKey( e, "_color" );
 406                 if ( _color && _color[ 0 ] ) {
 407                         sscanf( _color, "%f %f %f", &light->color[ 0 ], &light->color[ 1 ], &light->color[ 2 ] );
 408                         if ( colorsRGB ) {
 409                                 light->color[0] = Image_LinearFloatFromsRGBFloat( light->color[0] );
 410                                 light->color[1] = Image_LinearFloatFromsRGBFloat( light->color[1] );
 411                                 light->color[2] = Image_LinearFloatFromsRGBFloat( light->color[2] );
 412                         }
 413                         if ( !( light->flags & LIGHT_UNNORMALIZED ) ) {
 414                                 ColorNormalize( light->color, light->color );
 415                         }
 416                 }
 417                 else{
 418                         light->color[ 0 ] = light->color[ 1 ] = light->color[ 2 ] = 1.0f;
 419                 }
 420
 421                 light->extraDist = FloatForKey( e, "_extradist" );
 422                 if ( light->extraDist == 0.0f ) {
 423                         light->extraDist = extraDist;
 424                 }
 425
 426                 light->photons = intensity;
 427
 428                 light->type = EMIT_POINT;
 429
 430                 /* set falloff threshold */
 431                 light->falloffTolerance = falloffTolerance / numSamples;
 432
 433                 /* lights with a target will be spotlights */
 434                 target = ValueForKey( e, "target" );
 435                 if ( target[ 0 ] ) {
 436                         float radius;
 437                         float dist;
 438                         sun_t sun;
 439                         const char  *_sun;
 440
 441
 442                         /* get target */
 443                         e2 = FindTargetEntity( target );
 444                         if ( e2 == NULL ) {
 445                                 Sys_Printf( "WARNING: light at (%i %i %i) has missing target\n",
 446                                                         (int) light->origin[ 0 ], (int) light->origin[ 1 ], (int) light->origin[ 2 ] );
 447                                 light->photons *= pointScale;
 448                         }
 449                         else
 450                         {
 451                                 /* not a point light */
 452                                 numPointLights--;
 453                                 numSpotLights++;
 454
 455                                 /* make a spotlight */
 456                                 GetVectorForKey( e2, "origin", dest );
 457                                 VectorSubtract( dest, light->origin, light->normal );
 458                                 dist = VectorNormalize( light->normal, light->normal );
 459                                 radius = FloatForKey( e, "radius" );
 460                                 if ( !radius ) {
 461                                         radius = 64;
 462                                 }
 463                                 if ( !dist ) {
 464                                         dist = 64;
 465                                 }
 466                                 light->radiusByDist = ( radius + 16 ) / dist;
 467                                 light->type = EMIT_SPOT;
 468
 469                                 /* ydnar: wolf mods: spotlights always use nonlinear + angle attenuation */
 470                                 light->flags &= ~LIGHT_ATTEN_LINEAR;
 471                                 light->flags |= LIGHT_ATTEN_ANGLE;
 472                                 light->fade = 1.0f;
 473
 474                                 /* ydnar: is this a sun? */
 475                                 _sun = ValueForKey( e, "_sun" );
 476                                 if ( _sun[ 0 ] == '1' ) {
 477                                         /* not a spot light */
 478                                         numSpotLights--;
 479
 480                                         /* unlink this light */
 481                                         lights = light->next;
 482
 483                                         /* make a sun */
 484                                         VectorScale( light->normal, -1.0f, sun.direction );
 485                                         VectorCopy( light->color, sun.color );
 486                                         sun.photons = intensity;
 487                                         sun.deviance = deviance / 180.0f * Q_PI;
 488                                         sun.numSamples = numSamples;
 489                                         sun.style = noStyles ? LS_NORMAL : light->style;
 490                                         sun.next = NULL;
 491
 492                                         /* make a sun light */
 493                                         CreateSunLight( &sun );
 494
 495                                         /* free original light */
 496                                         free( light );
 497                                         light = NULL;
 498
 499                                         /* skip the rest of this love story */
 500                                         continue;
 501                                 }
 502                                 else
 503                                 {
 504                                         light->photons *= spotScale;
 505                                 }
 506                         }
 507                 }
 508                 else{
 509                         light->photons *= pointScale;
 510                 }
 511
 512                 /* jitter the light */
 513                 for ( j = 1; j < numSamples; j++ )
 514                 {
 515                         /* create a light */
 516                         light2 = safe_malloc( sizeof( *light ) );
 517                         memcpy( light2, light, sizeof( *light ) );
 518                         light2->next = lights;
 519                         lights = light2;
 520
 521                         /* add to counts */
 522                         if ( light->type == EMIT_SPOT ) {
 523                                 numSpotLights++;
 524                         }
 525                         else{
 526                                 numPointLights++;
 527                         }
 528
 529                         /* jitter it */
 530                         light2->origin[ 0 ] = light->origin[ 0 ] + ( Random() * 2.0f - 1.0f ) * deviance;
 531                         light2->origin[ 1 ] = light->origin[ 1 ] + ( Random() * 2.0f - 1.0f ) * deviance;
 532                         light2->origin[ 2 ] = light->origin[ 2 ] + ( Random() * 2.0f - 1.0f ) * deviance;
 533                 }
 534         }
 535 }
 536
 537
 538
 539 /*
 540    CreateSurfaceLights() - ydnar
 541    this hijacks the radiosity code to generate surface lights for first pass
 542  */
 543
 544 #define APPROX_BOUNCE   1.0f
 545
 546 void CreateSurfaceLights( void ){
 547         int i;
 548         bspDrawSurface_t    *ds;
 549         surfaceInfo_t       *info;
 550         shaderInfo_t        *si;
 551         light_t             *light;
 552         float subdivide;
 553         vec3_t origin;
 554         clipWork_t cw;
 555         const char          *nss;
 556
 557
 558         /* get sun shader supressor */
 559         nss = ValueForKey( &entities[ 0 ], "_noshadersun" );
 560
 561         /* walk the list of surfaces */
 562         for ( i = 0; i < numBSPDrawSurfaces; i++ )
 563         {
 564                 /* get surface and other bits */
 565                 ds = &bspDrawSurfaces[ i ];
 566                 info = &surfaceInfos[ i ];
 567                 si = info->si;
 568
 569                 /* sunlight? */
 570                 if ( si->sun != NULL && nss[ 0 ] != '1' ) {
 571                         Sys_FPrintf( SYS_VRB, "Sun: %s\n", si->shader );
 572                         CreateSunLight( si->sun );
 573                         si->sun = NULL; /* FIXME: leak! */
 574                 }
 575
 576                 /* sky light? */
 577                 if ( si->skyLightValue > 0.0f ) {
 578                         Sys_FPrintf( SYS_VRB, "Sky: %s\n", si->shader );
 579                         CreateSkyLights( si->color, si->skyLightValue, si->skyLightIterations, si->lightFilterRadius, si->lightStyle );
 580                         si->skyLightValue = 0.0f;   /* FIXME: hack! */
 581                 }
 582
 583                 /* try to early out */
 584                 if ( si->value <= 0 ) {
 585                         continue;
 586                 }
 587
 588                 /* autosprite shaders become point lights */
 589                 if ( si->autosprite ) {
 590                         /* create an average xyz */
 591                         VectorAdd( info->mins, info->maxs, origin );
 592                         VectorScale( origin, 0.5f, origin );
 593
 594                         /* create a light */
 595                         light = safe_malloc( sizeof( *light ) );
 596                         memset( light, 0, sizeof( *light ) );
 597                         light->next = lights;
 598                         lights = light;
 599
 600                         /* set it up */
 601                         light->flags = LIGHT_Q3A_DEFAULT;
 602                         light->type = EMIT_POINT;
 603                         light->photons = si->value * pointScale;
 604                         light->fade = 1.0f;
 605                         light->si = si;
 606                         VectorCopy( origin, light->origin );
 607                         VectorCopy( si->color, light->color );
 608                         light->falloffTolerance = falloffTolerance;
 609                         light->style = si->lightStyle;
 610
 611                         /* add to point light count and continue */
 612                         numPointLights++;
 613                         continue;
 614                 }
 615
 616                 /* get subdivision amount */
 617                 if ( si->lightSubdivide > 0 ) {
 618                         subdivide = si->lightSubdivide;
 619                 }
 620                 else{
 621                         subdivide = defaultLightSubdivide;
 622                 }
 623
 624                 /* switch on type */
 625                 switch ( ds->surfaceType )
 626                 {
 627                 case MST_PLANAR:
 628                 case MST_TRIANGLE_SOUP:
 629                         RadLightForTriangles( i, 0, info->lm, si, APPROX_BOUNCE, subdivide, &cw );
 630                         break;
 631
 632                 case MST_PATCH:
 633                         RadLightForPatch( i, 0, info->lm, si, APPROX_BOUNCE, subdivide, &cw );
 634                         break;
 635
 636                 default:
 637                         break;
 638                 }
 639         }
 640 }
 641
 642
 643
 644 /*
 645    SetEntityOrigins()
 646    find the offset values for inline models
 647  */
 648
 649 void SetEntityOrigins( void ){
 650         int i, j, k, f;
 651         entity_t            *e;
 652         vec3_t origin;
 653         const char          *key;
 654         int modelnum;
 655         bspModel_t          *dm;
 656         bspDrawSurface_t    *ds;
 657
 658
 659         /* ydnar: copy drawverts into private storage for nefarious purposes */
 660         yDrawVerts = safe_malloc( numBSPDrawVerts * sizeof( bspDrawVert_t ) );
 661         memcpy( yDrawVerts, bspDrawVerts, numBSPDrawVerts * sizeof( bspDrawVert_t ) );
 662
 663         /* set the entity origins */
 664         for ( i = 0; i < numEntities; i++ )
 665         {
 666                 /* get entity and model */
 667                 e = &entities[ i ];
 668                 key = ValueForKey( e, "model" );
 669                 if ( key[ 0 ] != '*' ) {
 670                         continue;
 671                 }
 672                 modelnum = atoi( key + 1 );
 673                 dm = &bspModels[ modelnum ];
 674
 675                 /* get entity origin */
 676                 key = ValueForKey( e, "origin" );
 677                 if ( key[ 0 ] == '\0' ) {
 678                         continue;
 679                 }
 680                 GetVectorForKey( e, "origin", origin );
 681
 682                 /* set origin for all surfaces for this model */
 683                 for ( j = 0; j < dm->numBSPSurfaces; j++ )
 684                 {
 685                         /* get drawsurf */
 686                         ds = &bspDrawSurfaces[ dm->firstBSPSurface + j ];
 687
 688                         /* set its verts */
 689                         for ( k = 0; k < ds->numVerts; k++ )
 690                         {
 691                                 f = ds->firstVert + k;
 692                                 VectorAdd( origin, bspDrawVerts[ f ].xyz, yDrawVerts[ f ].xyz );
 693                         }
 694                 }
 695         }
 696 }
 697
 698
 699
 700 /*
 701    PointToPolygonFormFactor()
 702    calculates the area over a point/normal hemisphere a winding covers
 703    ydnar: fixme: there has to be a faster way to calculate this
 704    without the expensive per-vert sqrts and transcendental functions
 705    ydnar 2002-09-30: added -faster switch because only 19% deviance > 10%
 706    between this and the approximation
 707  */
 708
 709 #define ONE_OVER_2PI    0.159154942f    //% (1.0f / (2.0f * 3.141592657f))
 710
 711 float PointToPolygonFormFactor( const vec3_t point, const vec3_t normal, const winding_t *w ){
 712         vec3_t triVector, triNormal;
 713         int i, j;
 714         vec3_t dirs[ MAX_POINTS_ON_WINDING ];
 715         float total;
 716         float dot, angle, facing;
 717
 718
 719         /* this is expensive */
 720         for ( i = 0; i < w->numpoints; i++ )
 721         {
 722                 VectorSubtract( w->p[ i ], point, dirs[ i ] );
 723                 VectorNormalize( dirs[ i ], dirs[ i ] );
 724         }
 725
 726         /* duplicate first vertex to avoid mod operation */
 727         VectorCopy( dirs[ 0 ], dirs[ i ] );
 728
 729         /* calculcate relative area */
 730         total = 0.0f;
 731         for ( i = 0; i < w->numpoints; i++ )
 732         {
 733                 /* get a triangle */
 734                 j = i + 1;
 735                 dot = DotProduct( dirs[ i ], dirs[ j ] );
 736
 737                 /* roundoff can cause slight creep, which gives an IND from acos */
 738                 if ( dot > 1.0f ) {
 739                         dot = 1.0f;
 740                 }
 741                 else if ( dot < -1.0f ) {
 742                         dot = -1.0f;
 743                 }
 744
 745                 /* get the angle */
 746                 angle = acos( dot );
 747
 748                 CrossProduct( dirs[ i ], dirs[ j ], triVector );
 749                 if ( VectorNormalize( triVector, triNormal ) < 0.0001f ) {
 750                         continue;
 751                 }
 752
 753                 facing = DotProduct( normal, triNormal );
 754                 total += facing * angle;
 755
 756                 /* ydnar: this was throwing too many errors with radiosity + crappy maps. ignoring it. */
 757                 if ( total > 6.3f || total < -6.3f ) {
 758                         return 0.0f;
 759                 }
 760         }
 761
 762         /* now in the range of 0 to 1 over the entire incoming hemisphere */
 763         //%     total /= (2.0f * 3.141592657f);
 764         total *= ONE_OVER_2PI;
 765         return total;
 766 }
 767
 768
 769
 770 /*
 771    LightContributionTosample()
 772    determines the amount of light reaching a sample (luxel or vertex) from a given light
 773  */
 774
 775 int LightContributionToSample( trace_t *trace ){
 776         light_t         *light;
 777         float angle;
 778         float add;
 779         float dist;
 780         float addDeluxe = 0.0f, addDeluxeBounceScale = 0.25f;
 781         qboolean angledDeluxe = qtrue;
 782         float colorBrightness;
 783         qboolean doAddDeluxe = qtrue;
 784
 785         /* get light */
 786         light = trace->light;
 787
 788         /* clear color */
 789         trace->forceSubsampling = 0.0f; /* to make sure */
 790         VectorClear( trace->color );
 791         VectorClear( trace->colorNoShadow );
 792         VectorClear( trace->directionContribution );
 793
 794         colorBrightness = RGBTOGRAY( light->color ) * ( 1.0f / 255.0f );
 795
 796         /* ydnar: early out */
 797         if ( !( light->flags & LIGHT_SURFACES ) || light->envelope <= 0.0f ) {
 798                 return 0;
 799         }
 800
 801         /* do some culling checks */
 802         if ( light->type != EMIT_SUN ) {
 803                 /* MrE: if the light is behind the surface */
 804                 if ( trace->twoSided == qfalse ) {
 805                         if ( DotProduct( light->origin, trace->normal ) - DotProduct( trace->origin, trace->normal ) < 0.0f ) {
 806                                 return 0;
 807                         }
 808                 }
 809
 810                 /* ydnar: test pvs */
 811                 if ( !ClusterVisible( trace->cluster, light->cluster ) ) {
 812                         return 0;
 813                 }
 814         }
 815
 816         /* exact point to polygon form factor */
 817         if ( light->type == EMIT_AREA ) {
 818                 float factor;
 819                 float d;
 820                 vec3_t pushedOrigin;
 821
 822                 /* project sample point into light plane */
 823                 d = DotProduct( trace->origin, light->normal ) - light->dist;
 824                 if ( d < 3.0f ) {
 825                         /* sample point behind plane? */
 826                         if ( !( light->flags & LIGHT_TWOSIDED ) && d < -1.0f ) {
 827                                 return 0;
 828                         }
 829
 830                         /* sample plane coincident? */
 831                         if ( d > -3.0f && DotProduct( trace->normal, light->normal ) > 0.9f ) {
 832                                 return 0;
 833                         }
 834                 }
 835
 836                 /* nudge the point so that it is clearly forward of the light */
 837                 /* so that surfaces meeting a light emitter don't get black edges */
 838                 if ( d > -8.0f && d < 8.0f ) {
 839                         VectorMA( trace->origin, ( 8.0f - d ), light->normal, pushedOrigin );
 840                 }
 841                 else{
 842                         VectorCopy( trace->origin, pushedOrigin );
 843                 }
 844
 845                 /* get direction and distance */
 846                 VectorCopy( light->origin, trace->end );
 847                 dist = SetupTrace( trace );
 848                 if ( dist >= light->envelope ) {
 849                         return 0;
 850                 }
 851
 852                 /* ptpff approximation */
 853                 if ( faster ) {
 854                         /* angle attenuation */
 855                         angle = DotProduct( trace->normal, trace->direction );
 856
 857                         /* twosided lighting */
 858                         if ( trace->twoSided && angle < 0 ) {
 859                                 angle = -angle;
 860
 861                                 /* no deluxemap contribution from "other side" light */
 862                                 doAddDeluxe = qfalse;
 863                         }
 864
 865                         /* attenuate */
 866                         angle *= -DotProduct( light->normal, trace->direction );
 867                         if ( angle == 0.0f ) {
 868                                 return 0;
 869                         }
 870                         else if ( angle < 0.0f &&
 871                                           ( trace->twoSided || ( light->flags & LIGHT_TWOSIDED ) ) ) {
 872                                 angle = -angle;
 873
 874                                 /* no deluxemap contribution from "other side" light */
 875                                 doAddDeluxe = qfalse;
 876                         }
 877
 878                         /* clamp the distance to prevent super hot spots */
 879                         dist = sqrt( dist * dist + light->extraDist * light->extraDist );
 880                         if ( dist < 16.0f ) {
 881                                 dist = 16.0f;
 882                         }
 883
 884                         add = light->photons / ( dist * dist ) * angle;
 885
 886                         if ( deluxemap ) {
 887                                 if ( angledDeluxe ) {
 888                                         addDeluxe = light->photons / ( dist * dist ) * angle;
 889                                 }
 890                                 else{
 891                                         addDeluxe = light->photons / ( dist * dist );
 892                                 }
 893                         }
 894                 }
 895                 else
 896                 {
 897                         /* calculate the contribution */
 898                         factor = PointToPolygonFormFactor( pushedOrigin, trace->normal, light->w );
 899                         if ( factor == 0.0f ) {
 900                                 return 0;
 901                         }
 902                         else if ( factor < 0.0f ) {
 903                                 /* twosided lighting */
 904                                 if ( trace->twoSided || ( light->flags & LIGHT_TWOSIDED ) ) {
 905                                         factor = -factor;
 906
 907                                         /* push light origin to other side of the plane */
 908                                         VectorMA( light->origin, -2.0f, light->normal, trace->end );
 909                                         dist = SetupTrace( trace );
 910                                         if ( dist >= light->envelope ) {
 911                                                 return 0;
 912                                         }
 913
 914                                         /* no deluxemap contribution from "other side" light */
 915                                         doAddDeluxe = qfalse;
 916                                 }
 917                                 else{
 918                                         return 0;
 919                                 }
 920                         }
 921
 922                         /* also don't deluxe if the direction is on the wrong side */
 923                         if ( DotProduct( trace->normal, trace->direction ) < 0 ) {
 924                                 /* no deluxemap contribution from "other side" light */
 925                                 doAddDeluxe = qfalse;
 926                         }
 927
 928                         /* ydnar: moved to here */
 929                         add = factor * light->add;
 930
 931                         if ( deluxemap ) {
 932                                 addDeluxe = add;
 933                         }
 934                 }
 935         }
 936
 937         /* point/spot lights */
 938         else if ( light->type == EMIT_POINT || light->type == EMIT_SPOT ) {
 939                 /* get direction and distance */
 940                 VectorCopy( light->origin, trace->end );
 941                 dist = SetupTrace( trace );
 942                 if ( dist >= light->envelope ) {
 943                         return 0;
 944                 }
 945
 946                 /* clamp the distance to prevent super hot spots */
 947                 dist = sqrt( dist * dist + light->extraDist * light->extraDist );
 948                 if ( dist < 16.0f ) {
 949                         dist = 16.0f;
 950                 }
 951
 952                 /* angle attenuation */
 953                 if ( light->flags & LIGHT_ATTEN_ANGLE ) {
 954                         /* standard Lambert attenuation */
 955                         float dot = DotProduct( trace->normal, trace->direction );
 956
 957                         /* twosided lighting */
 958                         if ( trace->twoSided && dot < 0 ) {
 959                                 dot = -dot;
 960
 961                                 /* no deluxemap contribution from "other side" light */
 962                                 doAddDeluxe = qfalse;
 963                         }
 964
 965                         /* jal: optional half Lambert attenuation (http://developer.valvesoftware.com/wiki/Half_Lambert) */
 966                         if ( lightAngleHL ) {
 967                                 if ( dot > 0.001f ) { // skip coplanar
 968                                         if ( dot > 1.0f ) {
 969                                                 dot = 1.0f;
 970                                         }
 971                                         dot = ( dot * 0.5f ) + 0.5f;
 972                                         dot *= dot;
 973                                 }
 974                                 else{
 975                                         dot = 0;
 976                                 }
 977                         }
 978
 979                         angle = dot;
 980                 }
 981                 else{
 982                         angle = 1.0f;
 983                 }
 984
 985                 if ( light->angleScale != 0.0f ) {
 986                         angle /= light->angleScale;
 987                         if ( angle > 1.0f ) {
 988                                 angle = 1.0f;
 989                         }
 990                 }
 991
 992                 /* attenuate */
 993                 if ( light->flags & LIGHT_ATTEN_LINEAR ) {
 994                         add = angle * light->photons * linearScale - ( dist * light->fade );
 995                         if ( add < 0.0f ) {
 996                                 add = 0.0f;
 997                         }
 998
 999                         if ( deluxemap ) {
1000                                 if ( angledDeluxe ) {
1001                                         addDeluxe = angle * light->photons * linearScale - ( dist * light->fade );
1002                                 }
1003                                 else{
1004                                         addDeluxe = light->photons * linearScale - ( dist * light->fade );
1005                                 }
1006
1007                                 if ( addDeluxe < 0.0f ) {
1008                                         addDeluxe = 0.0f;
1009                                 }
1010                         }
1011                 }
1012                 else
1013                 {
1014                         add = ( light->photons / ( dist * dist ) ) * angle;
1015                         if ( add < 0.0f ) {
1016                                 add = 0.0f;
1017                         }
1018
1019                         if ( deluxemap ) {
1020                                 if ( angledDeluxe ) {
1021                                         addDeluxe = ( light->photons / ( dist * dist ) ) * angle;
1022                                 }
1023                                 else{
1024                                         addDeluxe = ( light->photons / ( dist * dist ) );
1025                                 }
1026                         }
1027
1028                         if ( addDeluxe < 0.0f ) {
1029                                 addDeluxe = 0.0f;
1030                         }
1031                 }
1032
1033                 /* handle spotlights */
1034                 if ( light->type == EMIT_SPOT ) {
1035                         float distByNormal, radiusAtDist, sampleRadius;
1036                         vec3_t pointAtDist, distToSample;
1037
1038                         /* do cone calculation */
1039                         distByNormal = -DotProduct( trace->displacement, light->normal );
1040                         if ( distByNormal < 0.0f ) {
1041                                 return 0;
1042                         }
1043                         VectorMA( light->origin, distByNormal, light->normal, pointAtDist );
1044                         radiusAtDist = light->radiusByDist * distByNormal;
1045                         VectorSubtract( trace->origin, pointAtDist, distToSample );
1046                         sampleRadius = VectorLength( distToSample );
1047
1048                         /* outside the cone */
1049                         if ( sampleRadius >= radiusAtDist ) {
1050                                 return 0;
1051                         }
1052
1053                         /* attenuate */
1054                         if ( sampleRadius > ( radiusAtDist - 32.0f ) ) {
1055                                 add *= ( ( radiusAtDist - sampleRadius ) / 32.0f );
1056                                 if ( add < 0.0f ) {
1057                                         add = 0.0f;
1058                                 }
1059
1060                                 addDeluxe *= ( ( radiusAtDist - sampleRadius ) / 32.0f );
1061
1062                                 if ( addDeluxe < 0.0f ) {
1063                                         addDeluxe = 0.0f;
1064                                 }
1065                         }
1066                 }
1067         }
1068
1069         /* ydnar: sunlight */
1070         else if ( light->type == EMIT_SUN ) {
1071                 /* get origin and direction */
1072                 VectorAdd( trace->origin, light->origin, trace->end );
1073                 dist = SetupTrace( trace );
1074
1075                 /* angle attenuation */
1076                 if ( light->flags & LIGHT_ATTEN_ANGLE ) {
1077                         /* standard Lambert attenuation */
1078                         float dot = DotProduct( trace->normal, trace->direction );
1079
1080                         /* twosided lighting */
1081                         if ( trace->twoSided && dot < 0 ) {
1082                                 dot = -dot;
1083
1084                                 /* no deluxemap contribution from "other side" light */
1085                                 doAddDeluxe = qfalse;
1086                         }
1087
1088                         /* jal: optional half Lambert attenuation (http://developer.valvesoftware.com/wiki/Half_Lambert) */
1089                         if ( lightAngleHL ) {
1090                                 if ( dot > 0.001f ) { // skip coplanar
1091                                         if ( dot > 1.0f ) {
1092                                                 dot = 1.0f;
1093                                         }
1094                                         dot = ( dot * 0.5f ) + 0.5f;
1095                                         dot *= dot;
1096                                 }
1097                                 else{
1098                                         dot = 0;
1099                                 }
1100                         }
1101
1102                         angle = dot;
1103                 }
1104                 else{
1105                         angle = 1.0f;
1106                 }
1107
1108                 /* attenuate */
1109                 add = light->photons * angle;
1110
1111                 if ( deluxemap ) {
1112                         if ( angledDeluxe ) {
1113                                 addDeluxe = light->photons * angle;
1114                         }
1115                         else{
1116                                 addDeluxe = light->photons;
1117                         }
1118
1119                         if ( addDeluxe < 0.0f ) {
1120                                 addDeluxe = 0.0f;
1121                         }
1122                 }
1123
1124                 if ( add <= 0.0f ) {
1125                         return 0;
1126                 }
1127
1128                 /* VorteX: set noShadow color */
1129                 VectorScale( light->color, add, trace->colorNoShadow );
1130
1131                 addDeluxe *= colorBrightness;
1132
1133                 if ( bouncing ) {
1134                         addDeluxe *= addDeluxeBounceScale;
1135                         if ( addDeluxe < 0.00390625f ) {
1136                                 addDeluxe = 0.00390625f;
1137                         }
1138                 }
1139
1140                 VectorScale( trace->direction, addDeluxe, trace->directionContribution );
1141
1142                 /* setup trace */
1143                 trace->testAll = qtrue;
1144                 VectorScale( light->color, add, trace->color );
1145
1146                 /* trace to point */
1147                 if ( trace->testOcclusion && !trace->forceSunlight ) {
1148                         /* trace */
1149                         TraceLine( trace );
1150                         trace->forceSubsampling *= add;
1151                         if ( !( trace->compileFlags & C_SKY ) || trace->opaque ) {
1152                                 VectorClear( trace->color );
1153                                 VectorClear( trace->directionContribution );
1154
1155                                 return -1;
1156                         }
1157                 }
1158
1159                 /* return to sender */
1160                 return 1;
1161         }
1162         else{
1163                 Error( "Light of undefined type!" );
1164         }
1165
1166         /* VorteX: set noShadow color */
1167         VectorScale( light->color, add, trace->colorNoShadow );
1168
1169         /* ydnar: changed to a variable number */
1170         if ( add <= 0.0f || ( add <= light->falloffTolerance && ( light->flags & LIGHT_FAST_ACTUAL ) ) ) {
1171                 return 0;
1172         }
1173
1174         addDeluxe *= colorBrightness;
1175
1176         /* hack land: scale down the radiosity contribution to light directionality.
1177            Deluxemaps fusion many light directions into one. In a rtl process all lights
1178            would contribute individually to the bump map, so several light sources together
1179            would make it more directional (example: a yellow and red lights received from
1180            opposing sides would light one side in red and the other in blue, adding
1181            the effect of 2 directions applied. In the deluxemapping case, this 2 lights would
1182            neutralize each other making it look like having no direction.
1183            Same thing happens with radiosity. In deluxemapping case the radiosity contribution
1184            is modifying the direction applied from directional lights, making it go closer and closer
1185            to the surface normal the bigger is the amount of radiosity received.
1186            So, for preserving the directional lights contributions, we scale down the radiosity
1187            contribution. It's a hack, but there's a reason behind it */
1188         if ( bouncing ) {
1189                 addDeluxe *= addDeluxeBounceScale;
1190                 /* better NOT increase it beyond the original value
1191                    if( addDeluxe < 0.00390625f )
1192                     addDeluxe = 0.00390625f;
1193                  */
1194         }
1195
1196         if ( doAddDeluxe ) {
1197                 VectorScale( trace->direction, addDeluxe, trace->directionContribution );
1198         }
1199
1200         /* setup trace */
1201         trace->testAll = qfalse;
1202         VectorScale( light->color, add, trace->color );
1203
1204         /* raytrace */
1205         TraceLine( trace );
1206         trace->forceSubsampling *= add;
1207         if ( trace->passSolid || trace->opaque ) {
1208                 VectorClear( trace->color );
1209                 VectorClear( trace->directionContribution );
1210
1211                 return -1;
1212         }
1213
1214         /* return to sender */
1215         return 1;
1216 }
1217
1218
1219
1220 /*
1221    LightingAtSample()
1222    determines the amount of light reaching a sample (luxel or vertex)
1223  */
1224
1225 void LightingAtSample( trace_t *trace, byte styles[ MAX_LIGHTMAPS ], vec3_t colors[ MAX_LIGHTMAPS ] ){
1226         int i, lightmapNum;
1227
1228
1229         /* clear colors */
1230         for ( lightmapNum = 0; lightmapNum < MAX_LIGHTMAPS; lightmapNum++ )
1231                 VectorClear( colors[ lightmapNum ] );
1232
1233         /* ydnar: normalmap */
1234         if ( normalmap ) {
1235                 colors[ 0 ][ 0 ] = ( trace->normal[ 0 ] + 1.0f ) * 127.5f;
1236                 colors[ 0 ][ 1 ] = ( trace->normal[ 1 ] + 1.0f ) * 127.5f;
1237                 colors[ 0 ][ 2 ] = ( trace->normal[ 2 ] + 1.0f ) * 127.5f;
1238                 return;
1239         }
1240
1241         /* ydnar: don't bounce ambient all the time */
1242         if ( !bouncing ) {
1243                 VectorCopy( ambientColor, colors[ 0 ] );
1244         }
1245
1246         /* ydnar: trace to all the list of lights pre-stored in tw */
1247         for ( i = 0; i < trace->numLights && trace->lights[ i ] != NULL; i++ )
1248         {
1249                 /* set light */
1250                 trace->light = trace->lights[ i ];
1251
1252                 /* style check */
1253                 for ( lightmapNum = 0; lightmapNum < MAX_LIGHTMAPS; lightmapNum++ )
1254                 {
1255                         if ( styles[ lightmapNum ] == trace->light->style ||
1256                                  styles[ lightmapNum ] == LS_NONE ) {
1257                                 break;
1258                         }
1259                 }
1260
1261                 /* max of MAX_LIGHTMAPS (4) styles allowed to hit a sample */
1262                 if ( lightmapNum >= MAX_LIGHTMAPS ) {
1263                         continue;
1264                 }
1265
1266                 /* sample light */
1267                 LightContributionToSample( trace );
1268                 if ( trace->color[ 0 ] == 0.0f && trace->color[ 1 ] == 0.0f && trace->color[ 2 ] == 0.0f ) {
1269                         continue;
1270                 }
1271
1272                 /* handle negative light */
1273                 if ( trace->light->flags & LIGHT_NEGATIVE ) {
1274                         VectorScale( trace->color, -1.0f, trace->color );
1275                 }
1276
1277                 /* set style */
1278                 styles[ lightmapNum ] = trace->light->style;
1279
1280                 /* add it */
1281                 VectorAdd( colors[ lightmapNum ], trace->color, colors[ lightmapNum ] );
1282
1283                 /* cheap mode */
1284                 if ( cheap &&
1285                          colors[ 0 ][ 0 ] >= 255.0f &&
1286                          colors[ 0 ][ 1 ] >= 255.0f &&
1287                          colors[ 0 ][ 2 ] >= 255.0f ) {
1288                         break;
1289                 }
1290         }
1291 }
1292
1293
1294
1295 /*
1296    LightContributionToPoint()
1297    for a given light, how much light/color reaches a given point in space (with no facing)
1298    note: this is similar to LightContributionToSample() but optimized for omnidirectional sampling
1299  */
1300
1301 int LightContributionToPoint( trace_t *trace ){
1302         light_t     *light;
1303         float add, dist;
1304
1305
1306         /* get light */
1307         light = trace->light;
1308
1309         /* clear color */
1310         VectorClear( trace->color );
1311
1312         /* ydnar: early out */
1313         if ( !( light->flags & LIGHT_GRID ) || light->envelope <= 0.0f ) {
1314                 return qfalse;
1315         }
1316
1317         /* is this a sun? */
1318         if ( light->type != EMIT_SUN ) {
1319                 /* sun only? */
1320                 if ( sunOnly ) {
1321                         return qfalse;
1322                 }
1323
1324                 /* test pvs */
1325                 if ( !ClusterVisible( trace->cluster, light->cluster ) ) {
1326                         return qfalse;
1327                 }
1328         }
1329
1330         /* ydnar: check origin against light's pvs envelope */
1331         if ( trace->origin[ 0 ] > light->maxs[ 0 ] || trace->origin[ 0 ] < light->mins[ 0 ] ||
1332                  trace->origin[ 1 ] > light->maxs[ 1 ] || trace->origin[ 1 ] < light->mins[ 1 ] ||
1333                  trace->origin[ 2 ] > light->maxs[ 2 ] || trace->origin[ 2 ] < light->mins[ 2 ] ) {
1334                 gridBoundsCulled++;
1335                 return qfalse;
1336         }
1337
1338         /* set light origin */
1339         if ( light->type == EMIT_SUN ) {
1340                 VectorAdd( trace->origin, light->origin, trace->end );
1341         }
1342         else{
1343                 VectorCopy( light->origin, trace->end );
1344         }
1345
1346         /* set direction */
1347         dist = SetupTrace( trace );
1348
1349         /* test envelope */
1350         if ( dist > light->envelope ) {
1351                 gridEnvelopeCulled++;
1352                 return qfalse;
1353         }
1354
1355         /* ptpff approximation */
1356         if ( light->type == EMIT_AREA && faster ) {
1357                 /* clamp the distance to prevent super hot spots */
1358                 dist = sqrt( dist * dist + light->extraDist * light->extraDist );
1359                 if ( dist < 16.0f ) {
1360                         dist = 16.0f;
1361                 }
1362
1363                 /* attenuate */
1364                 add = light->photons / ( dist * dist );
1365         }
1366
1367         /* exact point to polygon form factor */
1368         else if ( light->type == EMIT_AREA ) {
1369                 float factor, d;
1370                 vec3_t pushedOrigin;
1371
1372
1373                 /* see if the point is behind the light */
1374                 d = DotProduct( trace->origin, light->normal ) - light->dist;
1375                 if ( !( light->flags & LIGHT_TWOSIDED ) && d < -1.0f ) {
1376                         return qfalse;
1377                 }
1378
1379                 /* nudge the point so that it is clearly forward of the light */
1380                 /* so that surfaces meeting a light emiter don't get black edges */
1381                 if ( d > -8.0f && d < 8.0f ) {
1382                         VectorMA( trace->origin, ( 8.0f - d ), light->normal, pushedOrigin );
1383                 }
1384                 else{
1385                         VectorCopy( trace->origin, pushedOrigin );
1386                 }
1387
1388                 /* calculate the contribution (ydnar 2002-10-21: [bug 642] bad normal calc) */
1389                 factor = PointToPolygonFormFactor( pushedOrigin, trace->direction, light->w );
1390                 if ( factor == 0.0f ) {
1391                         return qfalse;
1392                 }
1393                 else if ( factor < 0.0f ) {
1394                         if ( light->flags & LIGHT_TWOSIDED ) {
1395                                 factor = -factor;
1396                         }
1397                         else{
1398                                 return qfalse;
1399                         }
1400                 }
1401
1402                 /* ydnar: moved to here */
1403                 add = factor * light->add;
1404         }
1405
1406         /* point/spot lights */
1407         else if ( light->type == EMIT_POINT || light->type == EMIT_SPOT ) {
1408                 /* clamp the distance to prevent super hot spots */
1409                 dist = sqrt( dist * dist + light->extraDist * light->extraDist );
1410                 if ( dist < 16.0f ) {
1411                         dist = 16.0f;
1412                 }
1413
1414                 /* attenuate */
1415                 if ( light->flags & LIGHT_ATTEN_LINEAR ) {
1416                         add = light->photons * linearScale - ( dist * light->fade );
1417                         if ( add < 0.0f ) {
1418                                 add = 0.0f;
1419                         }
1420                 }
1421                 else{
1422                         add = light->photons / ( dist * dist );
1423                 }
1424
1425                 /* handle spotlights */
1426                 if ( light->type == EMIT_SPOT ) {
1427                         float distByNormal, radiusAtDist, sampleRadius;
1428                         vec3_t pointAtDist, distToSample;
1429
1430
1431                         /* do cone calculation */
1432                         distByNormal = -DotProduct( trace->displacement, light->normal );
1433                         if ( distByNormal < 0.0f ) {
1434                                 return qfalse;
1435                         }
1436                         VectorMA( light->origin, distByNormal, light->normal, pointAtDist );
1437                         radiusAtDist = light->radiusByDist * distByNormal;
1438                         VectorSubtract( trace->origin, pointAtDist, distToSample );
1439                         sampleRadius = VectorLength( distToSample );
1440
1441                         /* outside the cone */
1442                         if ( sampleRadius >= radiusAtDist ) {
1443                                 return qfalse;
1444                         }
1445
1446                         /* attenuate */
1447                         if ( sampleRadius > ( radiusAtDist - 32.0f ) ) {
1448                                 add *= ( ( radiusAtDist - sampleRadius ) / 32.0f );
1449                         }
1450                 }
1451         }
1452
1453         /* ydnar: sunlight */
1454         else if ( light->type == EMIT_SUN ) {
1455                 /* attenuate */
1456                 add = light->photons;
1457                 if ( add <= 0.0f ) {
1458                         return qfalse;
1459                 }
1460
1461                 /* setup trace */
1462                 trace->testAll = qtrue;
1463                 VectorScale( light->color, add, trace->color );
1464
1465                 /* trace to point */
1466                 if ( trace->testOcclusion && !trace->forceSunlight ) {
1467                         /* trace */
1468                         TraceLine( trace );
1469                         if ( !( trace->compileFlags & C_SKY ) || trace->opaque ) {
1470                                 VectorClear( trace->color );
1471                                 return -1;
1472                         }
1473                 }
1474
1475                 /* return to sender */
1476                 return qtrue;
1477         }
1478
1479         /* unknown light type */
1480         else{
1481                 return qfalse;
1482         }
1483
1484         /* ydnar: changed to a variable number */
1485         if ( add <= 0.0f || ( add <= light->falloffTolerance && ( light->flags & LIGHT_FAST_ACTUAL ) ) ) {
1486                 return qfalse;
1487         }
1488
1489         /* setup trace */
1490         trace->testAll = qfalse;
1491         VectorScale( light->color, add, trace->color );
1492
1493         /* trace */
1494         TraceLine( trace );
1495         if ( trace->passSolid ) {
1496                 VectorClear( trace->color );
1497                 return qfalse;
1498         }
1499
1500         /* we have a valid sample */
1501         return qtrue;
1502 }
1503
1504
1505
1506 /*
1507    TraceGrid()
1508    grid samples are for quickly determining the lighting
1509    of dynamically placed entities in the world
1510  */
1511
1512 #define MAX_CONTRIBUTIONS   32768
1513
1514 typedef struct
1515 {
1516         vec3_t dir;
1517         vec3_t color;
1518         vec3_t ambient;
1519         int style;
1520 }
1521 contribution_t;
1522
1523 void TraceGrid( int num ){
1524         int i, j, x, y, z, mod, numCon, numStyles;
1525         float d, step;
1526         vec3_t baseOrigin, cheapColor, color, thisdir;
1527         rawGridPoint_t          *gp;
1528         bspGridPoint_t          *bgp;
1529         contribution_t contributions[ MAX_CONTRIBUTIONS ];
1530         trace_t trace;
1531
1532         /* get grid points */
1533         gp = &rawGridPoints[ num ];
1534         bgp = &bspGridPoints[ num ];
1535
1536         /* get grid origin */
1537         mod = num;
1538         z = mod / ( gridBounds[ 0 ] * gridBounds[ 1 ] );
1539         mod -= z * ( gridBounds[ 0 ] * gridBounds[ 1 ] );
1540         y = mod / gridBounds[ 0 ];
1541         mod -= y * gridBounds[ 0 ];
1542         x = mod;
1543
1544         trace.origin[ 0 ] = gridMins[ 0 ] + x * gridSize[ 0 ];
1545         trace.origin[ 1 ] = gridMins[ 1 ] + y * gridSize[ 1 ];
1546         trace.origin[ 2 ] = gridMins[ 2 ] + z * gridSize[ 2 ];
1547
1548         /* set inhibit sphere */
1549         if ( gridSize[ 0 ] > gridSize[ 1 ] && gridSize[ 0 ] > gridSize[ 2 ] ) {
1550                 trace.inhibitRadius = gridSize[ 0 ] * 0.5f;
1551         }
1552         else if ( gridSize[ 1 ] > gridSize[ 0 ] && gridSize[ 1 ] > gridSize[ 2 ] ) {
1553                 trace.inhibitRadius = gridSize[ 1 ] * 0.5f;
1554         }
1555         else{
1556                 trace.inhibitRadius = gridSize[ 2 ] * 0.5f;
1557         }
1558
1559         /* find point cluster */
1560         trace.cluster = ClusterForPointExt( trace.origin, GRID_EPSILON );
1561         if ( trace.cluster < 0 ) {
1562                 /* try to nudge the origin around to find a valid point */
1563                 VectorCopy( trace.origin, baseOrigin );
1564                 for ( step = 0; ( step += 0.005 ) <= 1.0; )
1565                 {
1566                         VectorCopy( baseOrigin, trace.origin );
1567                         trace.origin[ 0 ] += step * ( Random() - 0.5 ) * gridSize[0];
1568                         trace.origin[ 1 ] += step * ( Random() - 0.5 ) * gridSize[1];
1569                         trace.origin[ 2 ] += step * ( Random() - 0.5 ) * gridSize[2];
1570
1571                         /* ydnar: changed to find cluster num */
1572                         trace.cluster = ClusterForPointExt( trace.origin, VERTEX_EPSILON );
1573                         if ( trace.cluster >= 0 ) {
1574                                 break;
1575                         }
1576                 }
1577
1578                 /* can't find a valid point at all */
1579                 if ( step > 1.0 ) {
1580                         return;
1581                 }
1582         }
1583
1584         /* setup trace */
1585         trace.testOcclusion = !noTrace;
1586         trace.forceSunlight = qfalse;
1587         trace.recvShadows = WORLDSPAWN_RECV_SHADOWS;
1588         trace.numSurfaces = 0;
1589         trace.surfaces = NULL;
1590         trace.numLights = 0;
1591         trace.lights = NULL;
1592
1593         /* clear */
1594         numCon = 0;
1595         VectorClear( cheapColor );
1596
1597         /* trace to all the lights, find the major light direction, and divide the
1598            total light between that along the direction and the remaining in the ambient */
1599         for ( trace.light = lights; trace.light != NULL; trace.light = trace.light->next )
1600         {
1601                 float addSize;
1602
1603
1604                 /* sample light */
1605                 if ( !LightContributionToPoint( &trace ) ) {
1606                         continue;
1607                 }
1608
1609                 /* handle negative light */
1610                 if ( trace.light->flags & LIGHT_NEGATIVE ) {
1611                         VectorScale( trace.color, -1.0f, trace.color );
1612                 }
1613
1614                 /* add a contribution */
1615                 VectorCopy( trace.color, contributions[ numCon ].color );
1616                 VectorCopy( trace.direction, contributions[ numCon ].dir );
1617                 VectorClear( contributions[ numCon ].ambient );
1618                 contributions[ numCon ].style = trace.light->style;
1619                 numCon++;
1620
1621                 /* push average direction around */
1622                 addSize = VectorLength( trace.color );
1623                 VectorMA( gp->dir, addSize, trace.direction, gp->dir );
1624
1625                 /* stop after a while */
1626                 if ( numCon >= ( MAX_CONTRIBUTIONS - 1 ) ) {
1627                         break;
1628                 }
1629
1630                 /* ydnar: cheap mode */
1631                 VectorAdd( cheapColor, trace.color, cheapColor );
1632                 if ( cheapgrid && cheapColor[ 0 ] >= 255.0f && cheapColor[ 1 ] >= 255.0f && cheapColor[ 2 ] >= 255.0f ) {
1633                         break;
1634                 }
1635         }
1636
1637         /////// Floodlighting for point //////////////////
1638         //do our floodlight ambient occlusion loop, and add a single contribution based on the brightest dir
1639         if ( floodlighty ) {
1640                 int k;
1641                 float addSize, f;
1642                 vec3_t dir = { 0, 0, 1 };
1643                 float ambientFrac = 0.25f;
1644
1645                 trace.testOcclusion = qtrue;
1646                 trace.forceSunlight = qfalse;
1647                 trace.inhibitRadius = DEFAULT_INHIBIT_RADIUS;
1648                 trace.testAll = qtrue;
1649
1650                 for ( k = 0; k < 2; k++ )
1651                 {
1652                         if ( k == 0 ) { // upper hemisphere
1653                                 trace.normal[0] = 0;
1654                                 trace.normal[1] = 0;
1655                                 trace.normal[2] = 1;
1656                         }
1657                         else //lower hemisphere
1658                         {
1659                                 trace.normal[0] = 0;
1660                                 trace.normal[1] = 0;
1661                                 trace.normal[2] = -1;
1662                         }
1663
1664                         f = FloodLightForSample( &trace, floodlightDistance, floodlight_lowquality );
1665
1666                         /* add a fraction as pure ambient, half as top-down direction */
1667                         contributions[ numCon ].color[0] = floodlightRGB[0] * floodlightIntensity * f * ( 1.0f - ambientFrac );
1668                         contributions[ numCon ].color[1] = floodlightRGB[1] * floodlightIntensity * f * ( 1.0f - ambientFrac );
1669                         contributions[ numCon ].color[2] = floodlightRGB[2] * floodlightIntensity * f * ( 1.0f - ambientFrac );
1670
1671                         contributions[ numCon ].ambient[0] = floodlightRGB[0] * floodlightIntensity * f * ambientFrac;
1672                         contributions[ numCon ].ambient[1] = floodlightRGB[1] * floodlightIntensity * f * ambientFrac;
1673                         contributions[ numCon ].ambient[2] = floodlightRGB[2] * floodlightIntensity * f * ambientFrac;
1674
1675                         contributions[ numCon ].dir[0] = dir[0];
1676                         contributions[ numCon ].dir[1] = dir[1];
1677                         contributions[ numCon ].dir[2] = dir[2];
1678
1679                         contributions[ numCon ].style = 0;
1680
1681                         /* push average direction around */
1682                         addSize = VectorLength( contributions[ numCon ].color );
1683                         VectorMA( gp->dir, addSize, dir, gp->dir );
1684
1685                         numCon++;
1686                 }
1687         }
1688         /////////////////////
1689
1690         /* normalize to get primary light direction */
1691         VectorNormalize( gp->dir, thisdir );
1692
1693         /* now that we have identified the primary light direction,
1694            go back and separate all the light into directed and ambient */
1695
1696         numStyles = 1;
1697         for ( i = 0; i < numCon; i++ )
1698         {
1699                 /* get relative directed strength */
1700                 d = DotProduct( contributions[ i ].dir, thisdir );
1701                 /* we map 1 to gridDirectionality, and 0 to gridAmbientDirectionality */
1702                 d = gridAmbientDirectionality + d * ( gridDirectionality - gridAmbientDirectionality );
1703                 if ( d < 0.0f ) {
1704                         d = 0.0f;
1705                 }
1706
1707                 /* find appropriate style */
1708                 for ( j = 0; j < numStyles; j++ )
1709                 {
1710                         if ( gp->styles[ j ] == contributions[ i ].style ) {
1711                                 break;
1712                         }
1713                 }
1714
1715                 /* style not found? */
1716                 if ( j >= numStyles ) {
1717                         /* add a new style */
1718                         if ( numStyles < MAX_LIGHTMAPS ) {
1719                                 gp->styles[ numStyles ] = contributions[ i ].style;
1720                                 bgp->styles[ numStyles ] = contributions[ i ].style;
1721                                 numStyles++;
1722                                 //%     Sys_Printf( "(%d, %d) ", num, contributions[ i ].style );
1723                         }
1724
1725                         /* fallback */
1726                         else{
1727                                 j = 0;
1728                         }
1729                 }
1730
1731                 /* add the directed color */
1732                 VectorMA( gp->directed[ j ], d, contributions[ i ].color, gp->directed[ j ] );
1733
1734                 /* ambient light will be at 1/4 the value of directed light */
1735                 /* (ydnar: nuke this in favor of more dramatic lighting?) */
1736                 /* (PM: how about actually making it work? d=1 when it got here for single lights/sun :P */
1737 //              d = 0.25f;
1738                 /* (Hobbes: always setting it to .25 is hardly any better) */
1739                 d = 0.25f * ( 1.0f - d );
1740                 VectorMA( gp->ambient[ j ], d, contributions[ i ].color, gp->ambient[ j ] );
1741
1742                 VectorAdd( gp->ambient[ j ], contributions[ i ].ambient, gp->ambient[ j ] );
1743
1744 /*
1745  * div0:
1746  * the total light average = ambient value + 0.25 * sum of all directional values
1747  * we can also get the total light average as 0.25 * the sum of all contributions
1748  *
1749  * 0.25 * sum(contribution_i) == ambient + 0.25 * sum(d_i contribution_i)
1750  *
1751  * THIS YIELDS:
1752  * ambient == 0.25 * sum((1 - d_i) contribution_i)
1753  *
1754  * So, 0.25f * (1.0f - d) IS RIGHT. If you want to tune it, tune d BEFORE.
1755  */
1756         }
1757
1758
1759         /* store off sample */
1760         for ( i = 0; i < MAX_LIGHTMAPS; i++ )
1761         {
1762 #if 0
1763                 /* do some fudging to keep the ambient from being too low (2003-07-05: 0.25 -> 0.125) */
1764                 if ( !bouncing ) {
1765                         VectorMA( gp->ambient[ i ], 0.125f, gp->directed[ i ], gp->ambient[ i ] );
1766                 }
1767 #endif
1768
1769                 /* set minimum light and copy off to bytes */
1770                 VectorCopy( gp->ambient[ i ], color );
1771                 for ( j = 0; j < 3; j++ )
1772                         if ( color[ j ] < minGridLight[ j ] ) {
1773                                 color[ j ] = minGridLight[ j ];
1774                         }
1775
1776                 /* vortex: apply gridscale and gridambientscale here */
1777                 ColorToBytes( color, bgp->ambient[ i ], gridScale * gridAmbientScale );
1778                 ColorToBytes( gp->directed[ i ], bgp->directed[ i ], gridScale );
1779         }
1780
1781         /* debug code */
1782         #if 0
1783         //%     Sys_FPrintf( SYS_VRB, "%10d %10d %10d ", &gp->ambient[ 0 ][ 0 ], &gp->ambient[ 0 ][ 1 ], &gp->ambient[ 0 ][ 2 ] );
1784         Sys_FPrintf( SYS_VRB, "%9d Amb: (%03.1f %03.1f %03.1f) Dir: (%03.1f %03.1f %03.1f)\n",
1785                                  num,
1786                                  gp->ambient[ 0 ][ 0 ], gp->ambient[ 0 ][ 1 ], gp->ambient[ 0 ][ 2 ],
1787                                  gp->directed[ 0 ][ 0 ], gp->directed[ 0 ][ 1 ], gp->directed[ 0 ][ 2 ] );
1788         #endif
1789
1790         /* store direction */
1791         NormalToLatLong( thisdir, bgp->latLong );
1792 }
1793
1794
1795
1796 /*
1797    SetupGrid()
1798    calculates the size of the lightgrid and allocates memory
1799  */
1800
1801 void SetupGrid( void ){
1802         int i, j;
1803         vec3_t maxs, oldGridSize;
1804         const char  *value;
1805         char temp[ 64 ];
1806
1807
1808         /* don't do this if not grid lighting */
1809         if ( noGridLighting ) {
1810                 return;
1811         }
1812
1813         /* ydnar: set grid size */
1814         value = ValueForKey( &entities[ 0 ], "gridsize" );
1815         if ( value[ 0 ] != '\0' ) {
1816                 sscanf( value, "%f %f %f", &gridSize[ 0 ], &gridSize[ 1 ], &gridSize[ 2 ] );
1817         }
1818
1819         /* quantize it */
1820         VectorCopy( gridSize, oldGridSize );
1821         for ( i = 0; i < 3; i++ )
1822                 gridSize[ i ] = gridSize[ i ] >= 8.0f ? floor( gridSize[ i ] ) : 8.0f;
1823
1824         /* ydnar: increase gridSize until grid count is smaller than max allowed */
1825         numRawGridPoints = MAX_MAP_LIGHTGRID + 1;
1826         j = 0;
1827         while ( numRawGridPoints > MAX_MAP_LIGHTGRID )
1828         {
1829                 /* get world bounds */
1830                 for ( i = 0; i < 3; i++ )
1831                 {
1832                         gridMins[ i ] = gridSize[ i ] * ceil( bspModels[ 0 ].mins[ i ] / gridSize[ i ] );
1833                         maxs[ i ] = gridSize[ i ] * floor( bspModels[ 0 ].maxs[ i ] / gridSize[ i ] );
1834                         gridBounds[ i ] = ( maxs[ i ] - gridMins[ i ] ) / gridSize[ i ] + 1;
1835                 }
1836
1837                 /* set grid size */
1838                 numRawGridPoints = gridBounds[ 0 ] * gridBounds[ 1 ] * gridBounds[ 2 ];
1839
1840                 /* increase grid size a bit */
1841                 if ( numRawGridPoints > MAX_MAP_LIGHTGRID ) {
1842                         gridSize[ j++ % 3 ] += 16.0f;
1843                 }
1844         }
1845
1846         /* print it */
1847         Sys_Printf( "Grid size = { %1.0f, %1.0f, %1.0f }\n", gridSize[ 0 ], gridSize[ 1 ], gridSize[ 2 ] );
1848
1849         /* different? */
1850         if ( !VectorCompare( gridSize, oldGridSize ) ) {
1851                 sprintf( temp, "%.0f %.0f %.0f", gridSize[ 0 ], gridSize[ 1 ], gridSize[ 2 ] );
1852                 SetKeyValue( &entities[ 0 ], "gridsize", (const char*) temp );
1853                 Sys_FPrintf( SYS_VRB, "Storing adjusted grid size\n" );
1854         }
1855
1856         /* 2nd variable. fixme: is this silly? */
1857         numBSPGridPoints = numRawGridPoints;
1858
1859         /* allocate lightgrid */
1860         rawGridPoints = safe_malloc( numRawGridPoints * sizeof( *rawGridPoints ) );
1861         memset( rawGridPoints, 0, numRawGridPoints * sizeof( *rawGridPoints ) );
1862
1863         if ( bspGridPoints != NULL ) {
1864                 free( bspGridPoints );
1865         }
1866         bspGridPoints = safe_malloc( numBSPGridPoints * sizeof( *bspGridPoints ) );
1867         memset( bspGridPoints, 0, numBSPGridPoints * sizeof( *bspGridPoints ) );
1868
1869         /* clear lightgrid */
1870         for ( i = 0; i < numRawGridPoints; i++ )
1871         {
1872                 VectorCopy( ambientColor, rawGridPoints[ i ].ambient[ j ] );
1873                 rawGridPoints[ i ].styles[ 0 ] = LS_NORMAL;
1874                 bspGridPoints[ i ].styles[ 0 ] = LS_NORMAL;
1875                 for ( j = 1; j < MAX_LIGHTMAPS; j++ )
1876                 {
1877                         rawGridPoints[ i ].styles[ j ] = LS_NONE;
1878                         bspGridPoints[ i ].styles[ j ] = LS_NONE;
1879                 }
1880         }
1881
1882         /* note it */
1883         Sys_Printf( "%9d grid points\n", numRawGridPoints );
1884 }
1885
1886
1887
1888 /*
1889    LightWorld()
1890    does what it says...
1891  */
1892
1893 void LightWorld( void ){
1894         vec3_t color;
1895         float f;
1896         int b, bt;
1897         qboolean minVertex, minGrid;
1898         const char  *value;
1899
1900
1901         /* ydnar: smooth normals */
1902         if ( shade ) {
1903                 Sys_Printf( "--- SmoothNormals ---\n" );
1904                 SmoothNormals();
1905         }
1906
1907         /* determine the number of grid points */
1908         Sys_Printf( "--- SetupGrid ---\n" );
1909         SetupGrid();
1910
1911         /* find the optional minimum lighting values */
1912         GetVectorForKey( &entities[ 0 ], "_color", color );
1913         if ( colorsRGB ) {
1914                 color[0] = Image_LinearFloatFromsRGBFloat( color[0] );
1915                 color[1] = Image_LinearFloatFromsRGBFloat( color[1] );
1916                 color[2] = Image_LinearFloatFromsRGBFloat( color[2] );
1917         }
1918         if ( VectorLength( color ) == 0.0f ) {
1919                 VectorSet( color, 1.0, 1.0, 1.0 );
1920         }
1921
1922         /* ambient */
1923         f = FloatForKey( &entities[ 0 ], "_ambient" );
1924         if ( f == 0.0f ) {
1925                 f = FloatForKey( &entities[ 0 ], "ambient" );
1926         }
1927         VectorScale( color, f, ambientColor );
1928
1929         /* minvertexlight */
1930         minVertex = qfalse;
1931         value = ValueForKey( &entities[ 0 ], "_minvertexlight" );
1932         if ( value[ 0 ] != '\0' ) {
1933                 minVertex = qtrue;
1934                 f = atof( value );
1935                 VectorScale( color, f, minVertexLight );
1936         }
1937
1938         /* mingridlight */
1939         minGrid = qfalse;
1940         value = ValueForKey( &entities[ 0 ], "_mingridlight" );
1941         if ( value[ 0 ] != '\0' ) {
1942                 minGrid = qtrue;
1943                 f = atof( value );
1944                 VectorScale( color, f, minGridLight );
1945         }
1946
1947         /* minlight */
1948         value = ValueForKey( &entities[ 0 ], "_minlight" );
1949         if ( value[ 0 ] != '\0' ) {
1950                 f = atof( value );
1951                 VectorScale( color, f, minLight );
1952                 if ( minVertex == qfalse ) {
1953                         VectorScale( color, f, minVertexLight );
1954                 }
1955                 if ( minGrid == qfalse ) {
1956                         VectorScale( color, f, minGridLight );
1957                 }
1958         }
1959
1960         /* create world lights */
1961         Sys_FPrintf( SYS_VRB, "--- CreateLights ---\n" );
1962         CreateEntityLights();
1963         CreateSurfaceLights();
1964         Sys_Printf( "%9d point lights\n", numPointLights );
1965         Sys_Printf( "%9d spotlights\n", numSpotLights );
1966         Sys_Printf( "%9d diffuse (area) lights\n", numDiffuseLights );
1967         Sys_Printf( "%9d sun/sky lights\n", numSunLights );
1968
1969         /* calculate lightgrid */
1970         if ( !noGridLighting ) {
1971                 /* ydnar: set up light envelopes */
1972                 SetupEnvelopes( qtrue, fastgrid );
1973
1974                 Sys_Printf( "--- TraceGrid ---\n" );
1975                 inGrid = qtrue;
1976                 RunThreadsOnIndividual( numRawGridPoints, qtrue, TraceGrid );
1977                 inGrid = qfalse;
1978                 Sys_Printf( "%d x %d x %d = %d grid\n",
1979                                         gridBounds[ 0 ], gridBounds[ 1 ], gridBounds[ 2 ], numBSPGridPoints );
1980
1981                 /* ydnar: emit statistics on light culling */
1982                 Sys_FPrintf( SYS_VRB, "%9d grid points envelope culled\n", gridEnvelopeCulled );
1983                 Sys_FPrintf( SYS_VRB, "%9d grid points bounds culled\n", gridBoundsCulled );
1984         }
1985
1986         /* slight optimization to remove a sqrt */
1987         subdivideThreshold *= subdivideThreshold;
1988
1989         /* map the world luxels */
1990         Sys_Printf( "--- MapRawLightmap ---\n" );
1991         RunThreadsOnIndividual( numRawLightmaps, qtrue, MapRawLightmap );
1992         Sys_Printf( "%9d luxels\n", numLuxels );
1993         Sys_Printf( "%9d luxels mapped\n", numLuxelsMapped );
1994         Sys_Printf( "%9d luxels occluded\n", numLuxelsOccluded );
1995
1996         /* dirty them up */
1997         if ( dirty ) {
1998                 Sys_Printf( "--- DirtyRawLightmap ---\n" );
1999                 RunThreadsOnIndividual( numRawLightmaps, qtrue, DirtyRawLightmap );
2000         }
2001
2002         /* floodlight pass */
2003         FloodlightRawLightmaps();
2004
2005         /* ydnar: set up light envelopes */
2006         SetupEnvelopes( qfalse, fast );
2007
2008         /* light up my world */
2009         lightsPlaneCulled = 0;
2010         lightsEnvelopeCulled = 0;
2011         lightsBoundsCulled = 0;
2012         lightsClusterCulled = 0;
2013
2014         Sys_Printf( "--- IlluminateRawLightmap ---\n" );
2015         RunThreadsOnIndividual( numRawLightmaps, qtrue, IlluminateRawLightmap );
2016         Sys_Printf( "%9d luxels illuminated\n", numLuxelsIlluminated );
2017
2018         StitchSurfaceLightmaps();
2019
2020         Sys_Printf( "--- IlluminateVertexes ---\n" );
2021         RunThreadsOnIndividual( numBSPDrawSurfaces, qtrue, IlluminateVertexes );
2022         Sys_Printf( "%9d vertexes illuminated\n", numVertsIlluminated );
2023
2024         /* ydnar: emit statistics on light culling */
2025         Sys_FPrintf( SYS_VRB, "%9d lights plane culled\n", lightsPlaneCulled );
2026         Sys_FPrintf( SYS_VRB, "%9d lights envelope culled\n", lightsEnvelopeCulled );
2027         Sys_FPrintf( SYS_VRB, "%9d lights bounds culled\n", lightsBoundsCulled );
2028         Sys_FPrintf( SYS_VRB, "%9d lights cluster culled\n", lightsClusterCulled );
2029
2030         /* radiosity */
2031         b = 1;
2032         bt = bounce;
2033         while ( bounce > 0 )
2034         {
2035                 /* store off the bsp between bounces */
2036                 StoreSurfaceLightmaps();
2037                 UnparseEntities();
2038                 Sys_Printf( "Writing %s\n", source );
2039                 WriteBSPFile( source );
2040
2041                 /* note it */
2042                 Sys_Printf( "\n--- Radiosity (bounce %d of %d) ---\n", b, bt );
2043
2044                 /* flag bouncing */
2045                 bouncing = qtrue;
2046                 VectorClear( ambientColor );
2047                 floodlighty = qfalse;
2048
2049                 /* generate diffuse lights */
2050                 RadFreeLights();
2051                 RadCreateDiffuseLights();
2052
2053                 /* setup light envelopes */
2054                 SetupEnvelopes( qfalse, fastbounce );
2055                 if ( numLights == 0 ) {
2056                         Sys_Printf( "No diffuse light to calculate, ending radiosity.\n" );
2057                         break;
2058                 }
2059
2060                 /* add to lightgrid */
2061                 if ( bouncegrid ) {
2062                         gridEnvelopeCulled = 0;
2063                         gridBoundsCulled = 0;
2064
2065                         Sys_Printf( "--- BounceGrid ---\n" );
2066                         inGrid = qtrue;
2067                         RunThreadsOnIndividual( numRawGridPoints, qtrue, TraceGrid );
2068                         inGrid = qfalse;
2069                         Sys_FPrintf( SYS_VRB, "%9d grid points envelope culled\n", gridEnvelopeCulled );
2070                         Sys_FPrintf( SYS_VRB, "%9d grid points bounds culled\n", gridBoundsCulled );
2071                 }
2072
2073                 /* light up my world */
2074                 lightsPlaneCulled = 0;
2075                 lightsEnvelopeCulled = 0;
2076                 lightsBoundsCulled = 0;
2077                 lightsClusterCulled = 0;
2078
2079                 Sys_Printf( "--- IlluminateRawLightmap ---\n" );
2080                 RunThreadsOnIndividual( numRawLightmaps, qtrue, IlluminateRawLightmap );
2081                 Sys_Printf( "%9d luxels illuminated\n", numLuxelsIlluminated );
2082                 Sys_Printf( "%9d vertexes illuminated\n", numVertsIlluminated );
2083
2084                 StitchSurfaceLightmaps();
2085
2086                 Sys_Printf( "--- IlluminateVertexes ---\n" );
2087                 RunThreadsOnIndividual( numBSPDrawSurfaces, qtrue, IlluminateVertexes );
2088                 Sys_Printf( "%9d vertexes illuminated\n", numVertsIlluminated );
2089
2090                 /* ydnar: emit statistics on light culling */
2091                 Sys_FPrintf( SYS_VRB, "%9d lights plane culled\n", lightsPlaneCulled );
2092                 Sys_FPrintf( SYS_VRB, "%9d lights envelope culled\n", lightsEnvelopeCulled );
2093                 Sys_FPrintf( SYS_VRB, "%9d lights bounds culled\n", lightsBoundsCulled );
2094                 Sys_FPrintf( SYS_VRB, "%9d lights cluster culled\n", lightsClusterCulled );
2095
2096                 /* interate */
2097                 bounce--;
2098                 b++;
2099         }
2100 }
2101
2102
2103
2104 /*
2105    LightMain()
2106    main routine for light processing
2107  */
2108
2109 int LightMain( int argc, char **argv ){
2110         int i;
2111         float f;
2112         char mapSource[ 1024 ];
2113         const char  *value;
2114         int lightmapMergeSize = 0;
2115         qboolean lightSamplesInsist = qfalse;
2116
2117
2118         /* note it */
2119         Sys_Printf( "--- Light ---\n" );
2120         Sys_Printf( "--- ProcessGameSpecific ---\n" );
2121
2122         /* set standard game flags */
2123         wolfLight = game->wolfLight;
2124         if ( wolfLight == qtrue ) {
2125                 Sys_Printf( " lightning model: wolf\n" );
2126         }
2127         else{
2128                 Sys_Printf( " lightning model: quake3\n" );
2129         }
2130
2131         lmCustomSize = game->lightmapSize;
2132         Sys_Printf( " lightmap size: %d x %d pixels\n", lmCustomSize, lmCustomSize );
2133
2134         lightmapGamma = game->lightmapGamma;
2135         Sys_Printf( " lightning gamma: %f\n", lightmapGamma );
2136
2137         lightmapsRGB = game->lightmapsRGB;
2138         if ( lightmapsRGB ) {
2139                 Sys_Printf( " lightmap colorspace: sRGB\n" );
2140         }
2141         else{
2142                 Sys_Printf( " lightmap colorspace: linear\n" );
2143         }
2144
2145         texturesRGB = game->texturesRGB;
2146         if ( texturesRGB ) {
2147                 Sys_Printf( " texture colorspace: sRGB\n" );
2148         }
2149         else{
2150                 Sys_Printf( " texture colorspace: linear\n" );
2151         }
2152
2153         colorsRGB = game->colorsRGB;
2154         if ( colorsRGB ) {
2155                 Sys_Printf( " _color colorspace: sRGB\n" );
2156         }
2157         else{
2158                 Sys_Printf( " _color colorspace: linear\n" );
2159         }
2160
2161         lightmapCompensate = game->lightmapCompensate;
2162         Sys_Printf( " lightning compensation: %f\n", lightmapCompensate );
2163
2164         lightmapExposure = game->lightmapExposure;
2165         Sys_Printf( " lightning exposure: %f\n", lightmapExposure );
2166
2167         gridScale = game->gridScale;
2168         Sys_Printf( " lightgrid scale: %f\n", gridScale );
2169
2170         gridAmbientScale = game->gridAmbientScale;
2171         Sys_Printf( " lightgrid ambient scale: %f\n", gridAmbientScale );
2172
2173         lightAngleHL = game->lightAngleHL;
2174         if ( lightAngleHL ) {
2175                 Sys_Printf( " half lambert light angle attenuation enabled \n" );
2176         }
2177
2178         noStyles = game->noStyles;
2179         if ( noStyles == qtrue ) {
2180                 Sys_Printf( " shader lightstyles hack: disabled\n" );
2181         }
2182         else{
2183                 Sys_Printf( " shader lightstyles hack: enabled\n" );
2184         }
2185
2186         patchShadows = game->patchShadows;
2187         if ( patchShadows == qtrue ) {
2188                 Sys_Printf( " patch shadows: enabled\n" );
2189         }
2190         else{
2191                 Sys_Printf( " patch shadows: disabled\n" );
2192         }
2193
2194         deluxemap = game->deluxeMap;
2195         deluxemode = game->deluxeMode;
2196         if ( deluxemap == qtrue ) {
2197                 if ( deluxemode ) {
2198                         Sys_Printf( " deluxemapping: enabled with tangentspace deluxemaps\n" );
2199                 }
2200                 else{
2201                         Sys_Printf( " deluxemapping: enabled with modelspace deluxemaps\n" );
2202                 }
2203         }
2204         else{
2205                 Sys_Printf( " deluxemapping: disabled\n" );
2206         }
2207
2208         Sys_Printf( "--- ProcessCommandLine ---\n" );
2209
2210         /* process commandline arguments */
2211         for ( i = 1; i < ( argc - 1 ); i++ )
2212         {
2213                 /* lightsource scaling */
2214                 if ( !strcmp( argv[ i ], "-point" ) || !strcmp( argv[ i ], "-pointscale" ) ) {
2215                         f = atof( argv[ i + 1 ] );
2216                         pointScale *= f;
2217                         spotScale *= f;
2218                         Sys_Printf( "Spherical point (entity) light scaled by %f to %f\n", f, pointScale );
2219                         Sys_Printf( "Spot point (entity) light scaled by %f to %f\n", f, spotScale );
2220                         i++;
2221                 }
2222
2223                 else if ( !strcmp( argv[ i ], "-spherical" ) || !strcmp( argv[ i ], "-sphericalscale" ) ) {
2224                         f = atof( argv[ i + 1 ] );
2225                         pointScale *= f;
2226                         Sys_Printf( "Spherical point (entity) light scaled by %f to %f\n", f, pointScale );
2227                         i++;
2228                 }
2229
2230                 else if ( !strcmp( argv[ i ], "-spot" ) || !strcmp( argv[ i ], "-spotscale" ) ) {
2231                         f = atof( argv[ i + 1 ] );
2232                         spotScale *= f;
2233                         Sys_Printf( "Spot point (entity) light scaled by %f to %f\n", f, spotScale );
2234                         i++;
2235                 }
2236
2237                 else if ( !strcmp( argv[ i ], "-area" ) || !strcmp( argv[ i ], "-areascale" ) ) {
2238                         f = atof( argv[ i + 1 ] );
2239                         areaScale *= f;
2240                         Sys_Printf( "Area (shader) light scaled by %f to %f\n", f, areaScale );
2241                         i++;
2242                 }
2243
2244                 else if ( !strcmp( argv[ i ], "-sky" ) || !strcmp( argv[ i ], "-skyscale" ) ) {
2245                         f = atof( argv[ i + 1 ] );
2246                         skyScale *= f;
2247                         Sys_Printf( "Sky/sun light scaled by %f to %f\n", f, skyScale );
2248                         i++;
2249                 }
2250
2251                 else if ( !strcmp( argv[ i ], "-vertexscale" ) ) {
2252                         f = atof( argv[ i + 1 ] );
2253                         vertexglobalscale *= f;
2254                         Sys_Printf( "Vertexlight scaled by %f to %f\n", f, vertexglobalscale );
2255                         i++;
2256                 }
2257
2258                 else if ( !strcmp( argv[ i ], "-nolm" ) ) {
2259                         nolm = qtrue;
2260                         Sys_Printf( "No lightmaps yo\n" );
2261                 }
2262
2263                 else if ( !strcmp( argv[ i ], "-bouncescale" ) ) {
2264                         f = atof( argv[ i + 1 ] );
2265                         bounceScale *= f;
2266                         Sys_Printf( "Bounce (radiosity) light scaled by %f to %f\n", f, bounceScale );
2267                         i++;
2268                 }
2269
2270                 else if ( !strcmp( argv[ i ], "-scale" ) ) {
2271                         f = atof( argv[ i + 1 ] );
2272                         pointScale *= f;
2273                         spotScale *= f;
2274                         areaScale *= f;
2275                         skyScale *= f;
2276                         bounceScale *= f;
2277                         Sys_Printf( "All light scaled by %f\n", f );
2278                         i++;
2279                 }
2280
2281                 else if ( !strcmp( argv[ i ], "-gridscale" ) ) {
2282                         f = atof( argv[ i + 1 ] );
2283                         Sys_Printf( "Grid lightning scaled by %f\n", f );
2284                         gridScale *= f;
2285                         i++;
2286                 }
2287
2288                 else if ( !strcmp( argv[ i ], "-gridambientscale" ) ) {
2289                         f = atof( argv[ i + 1 ] );
2290                         Sys_Printf( "Grid ambient lightning scaled by %f\n", f );
2291                         gridAmbientScale *= f;
2292                         i++;
2293                 }
2294
2295                 else if ( !strcmp( argv[ i ], "-griddirectionality" ) ) {
2296                         f = atof( argv[ i + 1 ] );
2297                         if ( f > 1 ) {
2298                                 f = 1;
2299                         }
2300                         if ( f < gridAmbientDirectionality ) {
2301                                 gridAmbientDirectionality = f;
2302                         }
2303                         Sys_Printf( "Grid directionality is %f\n", f );
2304                         gridDirectionality = f;
2305                         i++;
2306                 }
2307
2308                 else if ( !strcmp( argv[ i ], "-gridambientdirectionality" ) ) {
2309                         f = atof( argv[ i + 1 ] );
2310                         if ( f < -1 ) {
2311                                 f = -1;
2312                         }
2313                         if ( f > gridDirectionality ) {
2314                                 gridDirectionality = f;
2315                         }
2316                         Sys_Printf( "Grid ambient directionality is %f\n", f );
2317                         gridAmbientDirectionality = f;
2318                         i++;
2319                 }
2320
2321                 else if ( !strcmp( argv[ i ], "-gamma" ) ) {
2322                         f = atof( argv[ i + 1 ] );
2323                         lightmapGamma = f;
2324                         Sys_Printf( "Lighting gamma set to %f\n", lightmapGamma );
2325                         i++;
2326                 }
2327
2328                 else if ( !strcmp( argv[ i ], "-sRGBlight" ) ) {
2329                         lightmapsRGB = qtrue;
2330                         Sys_Printf( "Lighting is in sRGB\n" );
2331                 }
2332
2333                 else if ( !strcmp( argv[ i ], "-nosRGBlight" ) ) {
2334                         lightmapsRGB = qfalse;
2335                         Sys_Printf( "Lighting is linear\n" );
2336                 }
2337
2338                 else if ( !strcmp( argv[ i ], "-sRGBtex" ) ) {
2339                         texturesRGB = qtrue;
2340                         Sys_Printf( "Textures are in sRGB\n" );
2341                 }
2342
2343                 else if ( !strcmp( argv[ i ], "-nosRGBtex" ) ) {
2344                         texturesRGB = qfalse;
2345                         Sys_Printf( "Textures are linear\n" );
2346                 }
2347
2348                 else if ( !strcmp( argv[ i ], "-sRGBcolor" ) ) {
2349                         colorsRGB = qtrue;
2350                         Sys_Printf( "Colors are in sRGB\n" );
2351                 }
2352
2353                 else if ( !strcmp( argv[ i ], "-nosRGBcolor" ) ) {
2354                         colorsRGB = qfalse;
2355                         Sys_Printf( "Colors are linear\n" );
2356                 }
2357
2358                 else if ( !strcmp( argv[ i ], "-sRGB" ) ) {
2359                         lightmapsRGB = qtrue;
2360                         Sys_Printf( "Lighting is in sRGB\n" );
2361                         texturesRGB = qtrue;
2362                         Sys_Printf( "Textures are in sRGB\n" );
2363                         colorsRGB = qtrue;
2364                         Sys_Printf( "Colors are in sRGB\n" );
2365                 }
2366
2367                 else if ( !strcmp( argv[ i ], "-nosRGB" ) ) {
2368                         lightmapsRGB = qfalse;
2369                         Sys_Printf( "Lighting is linear\n" );
2370                         texturesRGB = qfalse;
2371                         Sys_Printf( "Textures are linear\n" );
2372                         colorsRGB = qfalse;
2373                         Sys_Printf( "Colors are linear\n" );
2374                 }
2375
2376                 else if ( !strcmp( argv[ i ], "-exposure" ) ) {
2377                         f = atof( argv[ i + 1 ] );
2378                         lightmapExposure = f;
2379                         Sys_Printf( "Lighting exposure set to %f\n", lightmapExposure );
2380                         i++;
2381                 }
2382
2383                 else if ( !strcmp( argv[ i ], "-compensate" ) ) {
2384                         f = atof( argv[ i + 1 ] );
2385                         if ( f <= 0.0f ) {
2386                                 f = 1.0f;
2387                         }
2388                         lightmapCompensate = f;
2389                         Sys_Printf( "Lighting compensation set to 1/%f\n", lightmapCompensate );
2390                         i++;
2391                 }
2392
2393                 /* ydnar switches */
2394                 else if ( !strcmp( argv[ i ], "-bounce" ) ) {
2395                         bounce = atoi( argv[ i + 1 ] );
2396                         if ( bounce < 0 ) {
2397                                 bounce = 0;
2398                         }
2399                         else if ( bounce > 0 ) {
2400                                 Sys_Printf( "Radiosity enabled with %d bounce(s)\n", bounce );
2401                         }
2402                         i++;
2403                 }
2404
2405                 else if ( !strcmp( argv[ i ], "-supersample" ) || !strcmp( argv[ i ], "-super" ) ) {
2406                         superSample = atoi( argv[ i + 1 ] );
2407                         if ( superSample < 1 ) {
2408                                 superSample = 1;
2409                         }
2410                         else if ( superSample > 1 ) {
2411                                 Sys_Printf( "Ordered-grid supersampling enabled with %d sample(s) per lightmap texel\n", ( superSample * superSample ) );
2412                         }
2413                         i++;
2414                 }
2415
2416                 else if ( !strcmp( argv[ i ], "-randomsamples" ) ) {
2417                         lightRandomSamples = qtrue;
2418                         Sys_Printf( "Random sampling enabled\n", lightRandomSamples );
2419                 }
2420
2421                 else if ( !strcmp( argv[ i ], "-samples" ) ) {
2422                         if ( *argv[i + 1] == '+' ) {
2423                                 lightSamplesInsist = qtrue;
2424                         }
2425                         else{
2426                                 lightSamplesInsist = qfalse;
2427                         }
2428                         lightSamples = atoi( argv[ i + 1 ] );
2429                         if ( lightSamples < 1 ) {
2430                                 lightSamples = 1;
2431                         }
2432                         else if ( lightSamples > 1 ) {
2433                                 Sys_Printf( "Adaptive supersampling enabled with %d sample(s) per lightmap texel\n", lightSamples );
2434                         }
2435                         i++;
2436                 }
2437
2438                 else if ( !strcmp( argv[ i ], "-samplessearchboxsize" ) ) {
2439                         lightSamplesSearchBoxSize = atoi( argv[ i + 1 ] );
2440                         if ( lightSamplesSearchBoxSize <= 0 ) {
2441                                 lightSamplesSearchBoxSize = 1;
2442                         }
2443                         if ( lightSamplesSearchBoxSize > 4 ) {
2444                                 lightSamplesSearchBoxSize = 4; /* more makes no sense */
2445                         }
2446                         else if ( lightSamplesSearchBoxSize != 1 ) {
2447                                 Sys_Printf( "Adaptive supersampling uses %f times the normal search box size\n", lightSamplesSearchBoxSize );
2448                         }
2449                         i++;
2450                 }
2451
2452                 else if ( !strcmp( argv[ i ], "-filter" ) ) {
2453                         filter = qtrue;
2454                         Sys_Printf( "Lightmap filtering enabled\n" );
2455                 }
2456
2457                 else if ( !strcmp( argv[ i ], "-dark" ) ) {
2458                         dark = qtrue;
2459                         Sys_Printf( "Dark lightmap seams enabled\n" );
2460                 }
2461
2462                 else if ( !strcmp( argv[ i ], "-shadeangle" ) ) {
2463                         shadeAngleDegrees = atof( argv[ i + 1 ] );
2464                         if ( shadeAngleDegrees < 0.0f ) {
2465                                 shadeAngleDegrees = 0.0f;
2466                         }
2467                         else if ( shadeAngleDegrees > 0.0f ) {
2468                                 shade = qtrue;
2469                                 Sys_Printf( "Phong shading enabled with a breaking angle of %f degrees\n", shadeAngleDegrees );
2470                         }
2471                         i++;
2472                 }
2473
2474                 else if ( !strcmp( argv[ i ], "-thresh" ) ) {
2475                         subdivideThreshold = atof( argv[ i + 1 ] );
2476                         if ( subdivideThreshold < 0 ) {
2477                                 subdivideThreshold = DEFAULT_SUBDIVIDE_THRESHOLD;
2478                         }
2479                         else{
2480                                 Sys_Printf( "Subdivision threshold set at %.3f\n", subdivideThreshold );
2481                         }
2482                         i++;
2483                 }
2484
2485                 else if ( !strcmp( argv[ i ], "-approx" ) ) {
2486                         approximateTolerance = atoi( argv[ i + 1 ] );
2487                         if ( approximateTolerance < 0 ) {
2488                                 approximateTolerance = 0;
2489                         }
2490                         else if ( approximateTolerance > 0 ) {
2491                                 Sys_Printf( "Approximating lightmaps within a byte tolerance of %d\n", approximateTolerance );
2492                         }
2493                         i++;
2494                 }
2495                 else if ( !strcmp( argv[ i ], "-deluxe" ) || !strcmp( argv[ i ], "-deluxemap" ) ) {
2496                         deluxemap = qtrue;
2497                         Sys_Printf( "Generating deluxemaps for average light direction\n" );
2498                 }
2499                 else if ( !strcmp( argv[ i ], "-deluxemode" ) ) {
2500                         deluxemode = atoi( argv[ i + 1 ] );
2501                         if ( deluxemode == 0 || deluxemode > 1 || deluxemode < 0 ) {
2502                                 Sys_Printf( "Generating modelspace deluxemaps\n" );
2503                                 deluxemode = 0;
2504                         }
2505                         else{
2506                                 Sys_Printf( "Generating tangentspace deluxemaps\n" );
2507                         }
2508                         i++;
2509                 }
2510                 else if ( !strcmp( argv[ i ], "-nodeluxe" ) || !strcmp( argv[ i ], "-nodeluxemap" ) ) {
2511                         deluxemap = qfalse;
2512                         Sys_Printf( "Disabling generating of deluxemaps for average light direction\n" );
2513                 }
2514                 else if ( !strcmp( argv[ i ], "-external" ) ) {
2515                         externalLightmaps = qtrue;
2516                         Sys_Printf( "Storing all lightmaps externally\n" );
2517                 }
2518
2519                 else if ( !strcmp( argv[ i ], "-lightmapsize" ) ) {
2520                         lmCustomSize = atoi( argv[ i + 1 ] );
2521
2522                         /* must be a power of 2 and greater than 2 */
2523                         if ( ( ( lmCustomSize - 1 ) & lmCustomSize ) || lmCustomSize < 2 ) {
2524                                 Sys_Printf( "WARNING: Lightmap size must be a power of 2, greater or equal to 2 pixels.\n" );
2525                                 lmCustomSize = game->lightmapSize;
2526                         }
2527                         i++;
2528                         Sys_Printf( "Default lightmap size set to %d x %d pixels\n", lmCustomSize, lmCustomSize );
2529
2530                         /* enable external lightmaps */
2531                         if ( lmCustomSize != game->lightmapSize ) {
2532                                 externalLightmaps = qtrue;
2533                                 Sys_Printf( "Storing all lightmaps externally\n" );
2534                         }
2535                 }
2536
2537                 else if ( !strcmp( argv[ i ], "-rawlightmapsizelimit" ) ) {
2538                         lmLimitSize = atoi( argv[ i + 1 ] );
2539
2540                         i++;
2541                         Sys_Printf( "Raw lightmap size limit set to %d x %d pixels\n", lmLimitSize, lmLimitSize );
2542                 }
2543
2544                 else if ( !strcmp( argv[ i ], "-lightmapdir" ) ) {
2545                         lmCustomDir = argv[i + 1];
2546                         i++;
2547                         Sys_Printf( "Lightmap directory set to %s\n", lmCustomDir );
2548                         externalLightmaps = qtrue;
2549                         Sys_Printf( "Storing all lightmaps externally\n" );
2550                 }
2551
2552                 /* ydnar: add this to suppress warnings */
2553                 else if ( !strcmp( argv[ i ],  "-custinfoparms" ) ) {
2554                         Sys_Printf( "Custom info parms enabled\n" );
2555                         useCustomInfoParms = qtrue;
2556                 }
2557
2558                 else if ( !strcmp( argv[ i ], "-wolf" ) ) {
2559                         /* -game should already be set */
2560                         wolfLight = qtrue;
2561                         Sys_Printf( "Enabling Wolf lighting model (linear default)\n" );
2562                 }
2563
2564                 else if ( !strcmp( argv[ i ], "-q3" ) ) {
2565                         /* -game should already be set */
2566                         wolfLight = qfalse;
2567                         Sys_Printf( "Enabling Quake 3 lighting model (nonlinear default)\n" );
2568                 }
2569
2570                 else if ( !strcmp( argv[ i ], "-extradist" ) ) {
2571                         extraDist = atof( argv[ i + 1 ] );
2572                         if ( extraDist < 0 ) {
2573                                 extraDist = 0;
2574                         }
2575                         i++;
2576                         Sys_Printf( "Default extra radius set to %f units\n", extraDist );
2577                 }
2578
2579                 else if ( !strcmp( argv[ i ], "-sunonly" ) ) {
2580                         sunOnly = qtrue;
2581                         Sys_Printf( "Only computing sunlight\n" );
2582                 }
2583
2584                 else if ( !strcmp( argv[ i ], "-bounceonly" ) ) {
2585                         bounceOnly = qtrue;
2586                         Sys_Printf( "Storing bounced light (radiosity) only\n" );
2587                 }
2588
2589                 else if ( !strcmp( argv[ i ], "-nocollapse" ) ) {
2590                         noCollapse = qtrue;
2591                         Sys_Printf( "Identical lightmap collapsing disabled\n" );
2592                 }
2593
2594                 else if ( !strcmp( argv[ i ], "-nolightmapsearch" ) ) {
2595                         lightmapSearchBlockSize = 1;
2596                         Sys_Printf( "No lightmap searching - all lightmaps will be sequential\n" );
2597                 }
2598
2599                 else if ( !strcmp( argv[ i ], "-lightmapsearchpower" ) ) {
2600                         lightmapMergeSize = ( game->lightmapSize << atoi( argv[i + 1] ) );
2601                         ++i;
2602                         Sys_Printf( "Restricted lightmap searching enabled - optimize for lightmap merge power %d (size %d)\n", atoi( argv[i] ), lightmapMergeSize );
2603                 }
2604
2605                 else if ( !strcmp( argv[ i ], "-lightmapsearchblocksize" ) ) {
2606                         lightmapSearchBlockSize = atoi( argv[i + 1] );
2607                         ++i;
2608                         Sys_Printf( "Restricted lightmap searching enabled - block size set to %d\n", lightmapSearchBlockSize );
2609                 }
2610
2611                 else if ( !strcmp( argv[ i ], "-shade" ) ) {
2612                         shade = qtrue;
2613                         Sys_Printf( "Phong shading enabled\n" );
2614                 }
2615
2616                 else if ( !strcmp( argv[ i ], "-bouncegrid" ) ) {
2617                         bouncegrid = qtrue;
2618                         if ( bounce > 0 ) {
2619                                 Sys_Printf( "Grid lighting with radiosity enabled\n" );
2620                         }
2621                 }
2622
2623                 else if ( !strcmp( argv[ i ], "-smooth" ) ) {
2624                         lightSamples = EXTRA_SCALE;
2625                         Sys_Printf( "The -smooth argument is deprecated, use \"-samples 2\" instead\n" );
2626                 }
2627
2628                 else if ( !strcmp( argv[ i ], "-nofastpoint" ) ) {
2629                         fastpoint = qfalse;
2630                         Sys_Printf( "Automatic fast mode for point lights disabled\n" );
2631                 }
2632
2633                 else if ( !strcmp( argv[ i ], "-fast" ) ) {
2634                         fast = qtrue;
2635                         fastgrid = qtrue;
2636                         fastbounce = qtrue;
2637                         Sys_Printf( "Fast mode enabled for all area lights\n" );
2638                 }
2639
2640                 else if ( !strcmp( argv[ i ], "-faster" ) ) {
2641                         faster = qtrue;
2642                         fast = qtrue;
2643                         fastgrid = qtrue;
2644                         fastbounce = qtrue;
2645                         Sys_Printf( "Faster mode enabled\n" );
2646                 }
2647
2648                 else if ( !strcmp( argv[ i ], "-fastgrid" ) ) {
2649                         fastgrid = qtrue;
2650                         Sys_Printf( "Fast grid lighting enabled\n" );
2651                 }
2652
2653                 else if ( !strcmp( argv[ i ], "-fastbounce" ) ) {
2654                         fastbounce = qtrue;
2655                         Sys_Printf( "Fast bounce mode enabled\n" );
2656                 }
2657
2658                 else if ( !strcmp( argv[ i ], "-cheap" ) ) {
2659                         cheap = qtrue;
2660                         cheapgrid = qtrue;
2661                         Sys_Printf( "Cheap mode enabled\n" );
2662                 }
2663
2664                 else if ( !strcmp( argv[ i ], "-cheapgrid" ) ) {
2665                         cheapgrid = qtrue;
2666                         Sys_Printf( "Cheap grid mode enabled\n" );
2667                 }
2668
2669                 else if ( !strcmp( argv[ i ], "-normalmap" ) ) {
2670                         normalmap = qtrue;
2671                         Sys_Printf( "Storing normal map instead of lightmap\n" );
2672                 }
2673
2674                 else if ( !strcmp( argv[ i ], "-trisoup" ) ) {
2675                         trisoup = qtrue;
2676                         Sys_Printf( "Converting brush faces to triangle soup\n" );
2677                 }
2678
2679                 else if ( !strcmp( argv[ i ], "-debug" ) ) {
2680                         debug = qtrue;
2681                         Sys_Printf( "Lightmap debugging enabled\n" );
2682                 }
2683
2684                 else if ( !strcmp( argv[ i ], "-debugsurfaces" ) || !strcmp( argv[ i ], "-debugsurface" ) ) {
2685                         debugSurfaces = qtrue;
2686                         Sys_Printf( "Lightmap surface debugging enabled\n" );
2687                 }
2688
2689                 else if ( !strcmp( argv[ i ], "-debugunused" ) ) {
2690                         debugUnused = qtrue;
2691                         Sys_Printf( "Unused luxel debugging enabled\n" );
2692                 }
2693
2694                 else if ( !strcmp( argv[ i ], "-debugaxis" ) ) {
2695                         debugAxis = qtrue;
2696                         Sys_Printf( "Lightmap axis debugging enabled\n" );
2697                 }
2698
2699                 else if ( !strcmp( argv[ i ], "-debugcluster" ) ) {
2700                         debugCluster = qtrue;
2701                         Sys_Printf( "Luxel cluster debugging enabled\n" );
2702                 }
2703
2704                 else if ( !strcmp( argv[ i ], "-debugorigin" ) ) {
2705                         debugOrigin = qtrue;
2706                         Sys_Printf( "Luxel origin debugging enabled\n" );
2707                 }
2708
2709                 else if ( !strcmp( argv[ i ], "-debugdeluxe" ) ) {
2710                         deluxemap = qtrue;
2711                         debugDeluxemap = qtrue;
2712                         Sys_Printf( "Deluxemap debugging enabled\n" );
2713                 }
2714
2715                 else if ( !strcmp( argv[ i ], "-export" ) ) {
2716                         exportLightmaps = qtrue;
2717                         Sys_Printf( "Exporting lightmaps\n" );
2718                 }
2719
2720                 else if ( !strcmp( argv[ i ], "-notrace" ) ) {
2721                         noTrace = qtrue;
2722                         Sys_Printf( "Shadow occlusion disabled\n" );
2723                 }
2724                 else if ( !strcmp( argv[ i ], "-patchshadows" ) ) {
2725                         patchShadows = qtrue;
2726                         Sys_Printf( "Patch shadow casting enabled\n" );
2727                 }
2728                 else if ( !strcmp( argv[ i ], "-extra" ) ) {
2729                         superSample = EXTRA_SCALE;      /* ydnar */
2730                         Sys_Printf( "The -extra argument is deprecated, use \"-super 2\" instead\n" );
2731                 }
2732                 else if ( !strcmp( argv[ i ], "-extrawide" ) ) {
2733                         superSample = EXTRAWIDE_SCALE;  /* ydnar */
2734                         filter = qtrue;                 /* ydnar */
2735                         Sys_Printf( "The -extrawide argument is deprecated, use \"-filter [-super 2]\" instead\n" );
2736                 }
2737                 else if ( !strcmp( argv[ i ], "-samplesize" ) ) {
2738                         sampleSize = atoi( argv[ i + 1 ] );
2739                         if ( sampleSize < 1 ) {
2740                                 sampleSize = 1;
2741                         }
2742                         i++;
2743                         Sys_Printf( "Default lightmap sample size set to %dx%d units\n", sampleSize, sampleSize );
2744                 }
2745                 else if ( !strcmp( argv[ i ], "-minsamplesize" ) ) {
2746                         minSampleSize = atoi( argv[ i + 1 ] );
2747                         if ( minSampleSize < 1 ) {
2748                                 minSampleSize = 1;
2749                         }
2750                         i++;
2751                         Sys_Printf( "Minimum lightmap sample size set to %dx%d units\n", minSampleSize, minSampleSize );
2752                 }
2753                 else if ( !strcmp( argv[ i ],  "-samplescale" ) ) {
2754                         sampleScale = atoi( argv[ i + 1 ] );
2755                         i++;
2756                         Sys_Printf( "Lightmaps sample scale set to %d\n", sampleScale );
2757                 }
2758                 else if ( !strcmp( argv[ i ], "-novertex" ) ) {
2759                         noVertexLighting = 1;
2760                         if ( ( atof( argv[ i + 1 ] ) != 0 ) && ( atof( argv[ i + 1 ] )) < 1 ) {
2761                                 noVertexLighting = ( atof( argv[ i + 1 ] ) );
2762                                 i++;
2763                                 Sys_Printf( "Setting vertex lighting globally to %d\n", noVertexLighting );
2764                         }
2765                         else{
2766                                 Sys_Printf( "Disabling vertex lighting\n" );
2767                         }
2768                 }
2769                 else if ( !strcmp( argv[ i ], "-nogrid" ) ) {
2770                         noGridLighting = qtrue;
2771                         Sys_Printf( "Disabling grid lighting\n" );
2772                 }
2773                 else if ( !strcmp( argv[ i ], "-border" ) ) {
2774                         lightmapBorder = qtrue;
2775                         Sys_Printf( "Adding debug border to lightmaps\n" );
2776                 }
2777                 else if ( !strcmp( argv[ i ], "-nosurf" ) ) {
2778                         noSurfaces = qtrue;
2779                         Sys_Printf( "Not tracing against surfaces\n" );
2780                 }
2781                 else if ( !strcmp( argv[ i ], "-dump" ) ) {
2782                         dump = qtrue;
2783                         Sys_Printf( "Dumping radiosity lights into numbered prefabs\n" );
2784                 }
2785                 else if ( !strcmp( argv[ i ], "-lomem" ) ) {
2786                         loMem = qtrue;
2787                         Sys_Printf( "Enabling low-memory (potentially slower) lighting mode\n" );
2788                 }
2789                 else if ( !strcmp( argv[ i ], "-lightanglehl" ) ) {
2790                         if ( ( atoi( argv[ i + 1 ] ) != 0 ) != lightAngleHL ) {
2791                                 lightAngleHL = ( atoi( argv[ i + 1 ] ) != 0 );
2792                                 if ( lightAngleHL ) {
2793                                         Sys_Printf( "Enabling half lambert light angle attenuation\n" );
2794                                         i++;
2795                                 }
2796                                 else{
2797                                         Sys_Printf( "Disabling half lambert light angle attenuation\n" );
2798                                         i++;
2799                                 }
2800                         }
2801                 }
2802                 else if ( !strcmp( argv[ i ], "-nostyle" ) || !strcmp( argv[ i ], "-nostyles" ) ) {
2803                         noStyles = qtrue;
2804                         Sys_Printf( "Disabling lightstyles\n" );
2805                 }
2806                 else if ( !strcmp( argv[ i ], "-style" ) || !strcmp( argv[ i ], "-styles" ) ) {
2807                         noStyles = qfalse;
2808                         Sys_Printf( "Enabling lightstyles\n" );
2809                 }
2810                 else if ( !strcmp( argv[ i ], "-cpma" ) ) {
2811                         cpmaHack = qtrue;
2812                         Sys_Printf( "Enabling Challenge Pro Mode Asstacular Vertex Lighting Mode (tm)\n" );
2813                 }
2814                 else if ( !strcmp( argv[ i ], "-floodlight" ) ) {
2815                         floodlighty = qtrue;
2816                         Sys_Printf( "FloodLighting enabled\n" );
2817                 }
2818                 else if ( !strcmp( argv[ i ], "-debugnormals" ) ) {
2819                         debugnormals = qtrue;
2820                         Sys_Printf( "DebugNormals enabled\n" );
2821                 }
2822                 else if ( !strcmp( argv[ i ], "-lowquality" ) ) {
2823                         floodlight_lowquality = qtrue;
2824                         Sys_Printf( "Low Quality FloodLighting enabled\n" );
2825                 }
2826
2827                 /* r7: dirtmapping */
2828                 else if ( !strcmp( argv[ i ], "-dirty" ) ) {
2829                         dirty = qtrue;
2830                         Sys_Printf( "Dirtmapping enabled\n" );
2831                 }
2832                 else if ( !strcmp( argv[ i ], "-dirtdebug" ) || !strcmp( argv[ i ], "-debugdirt" ) ) {
2833                         dirtDebug = qtrue;
2834                         Sys_Printf( "Dirtmap debugging enabled\n" );
2835                 }
2836                 else if ( !strcmp( argv[ i ], "-dirtmode" ) ) {
2837                         dirtMode = atoi( argv[ i + 1 ] );
2838                         if ( dirtMode != 0 && dirtMode != 1 ) {
2839                                 dirtMode = 0;
2840                         }
2841                         if ( dirtMode == 1 ) {
2842                                 Sys_Printf( "Enabling randomized dirtmapping\n" );
2843                         }
2844                         else{
2845                                 Sys_Printf( "Enabling ordered dir mapping\n" );
2846                         }
2847                         i++;
2848                 }
2849                 else if ( !strcmp( argv[ i ], "-dirtdepth" ) ) {
2850                         dirtDepth = atof( argv[ i + 1 ] );
2851                         if ( dirtDepth <= 0.0f ) {
2852                                 dirtDepth = 128.0f;
2853                         }
2854                         Sys_Printf( "Dirtmapping depth set to %.1f\n", dirtDepth );
2855                         i++;
2856                 }
2857                 else if ( !strcmp( argv[ i ], "-dirtscale" ) ) {
2858                         dirtScale = atof( argv[ i + 1 ] );
2859                         if ( dirtScale <= 0.0f ) {
2860                                 dirtScale = 1.0f;
2861                         }
2862                         Sys_Printf( "Dirtmapping scale set to %.1f\n", dirtScale );
2863                         i++;
2864                 }
2865                 else if ( !strcmp( argv[ i ], "-dirtgain" ) ) {
2866                         dirtGain = atof( argv[ i + 1 ] );
2867                         if ( dirtGain <= 0.0f ) {
2868                                 dirtGain = 1.0f;
2869                         }
2870                         Sys_Printf( "Dirtmapping gain set to %.1f\n", dirtGain );
2871                         i++;
2872                 }
2873                 else if ( !strcmp( argv[ i ], "-trianglecheck" ) ) {
2874                         lightmapTriangleCheck = qtrue;
2875                 }
2876                 else if ( !strcmp( argv[ i ], "-extravisnudge" ) ) {
2877                         lightmapExtraVisClusterNudge = qtrue;
2878                 }
2879                 else if ( !strcmp( argv[ i ], "-fill" ) ) {
2880                         lightmapFill = qtrue;
2881                         Sys_Printf( "Filling lightmap colors from surrounding pixels to improve JPEG compression\n" );
2882                 }
2883                 /* unhandled args */
2884                 else
2885                 {
2886                         Sys_Printf( "WARNING: Unknown argument \"%s\"\n", argv[ i ] );
2887                 }
2888
2889         }
2890
2891         /* fix up falloff tolerance for sRGB */
2892         if ( lightmapsRGB ) {
2893                 falloffTolerance = Image_LinearFloatFromsRGBFloat( falloffTolerance * ( 1.0 / 255.0 ) ) * 255.0;
2894         }
2895
2896         /* fix up samples count */
2897         if ( lightRandomSamples ) {
2898                 if ( !lightSamplesInsist ) {
2899                         /* approximately match -samples in quality */
2900                         switch ( lightSamples )
2901                         {
2902                         /* somewhat okay */
2903                         case 1:
2904                         case 2:
2905                                 lightSamples = 16;
2906                                 Sys_Printf( "Adaptive supersampling preset enabled with %d random sample(s) per lightmap texel\n", lightSamples );
2907                                 break;
2908
2909                         /* good */
2910                         case 3:
2911                                 lightSamples = 64;
2912                                 Sys_Printf( "Adaptive supersampling preset enabled with %d random sample(s) per lightmap texel\n", lightSamples );
2913                                 break;
2914
2915                         /* perfect */
2916                         case 4:
2917                                 lightSamples = 256;
2918                                 Sys_Printf( "Adaptive supersampling preset enabled with %d random sample(s) per lightmap texel\n", lightSamples );
2919                                 break;
2920
2921                         default: break;
2922                         }
2923                 }
2924         }
2925
2926         /* fix up lightmap search power */
2927         if ( lightmapMergeSize ) {
2928                 lightmapSearchBlockSize = ( lightmapMergeSize / lmCustomSize ) * ( lightmapMergeSize / lmCustomSize );
2929                 if ( lightmapSearchBlockSize < 1 ) {
2930                         lightmapSearchBlockSize = 1;
2931                 }
2932
2933                 Sys_Printf( "Restricted lightmap searching enabled - block size adjusted to %d\n", lightmapSearchBlockSize );
2934         }
2935
2936         /* clean up map name */
2937         strcpy( source, ExpandArg( argv[ i ] ) );
2938         StripExtension( source );
2939         DefaultExtension( source, ".bsp" );
2940         strcpy( mapSource, ExpandArg( argv[ i ] ) );
2941         StripExtension( mapSource );
2942         DefaultExtension( mapSource, ".map" );
2943
2944         /* ydnar: set default sample size */
2945         SetDefaultSampleSize( sampleSize );
2946
2947         /* ydnar: handle shaders */
2948         BeginMapShaderFile( source );
2949         LoadShaderInfo();
2950
2951         /* note loading */
2952         Sys_Printf( "Loading %s\n", source );
2953
2954         /* ydnar: load surface file */
2955         LoadSurfaceExtraFile( source );
2956
2957         /* load bsp file */
2958         LoadBSPFile( source );
2959
2960         /* parse bsp entities */
2961         ParseEntities();
2962
2963         /* inject command line parameters */
2964         InjectCommandLine( argv, 0, argc - 1 );
2965
2966         /* load map file */
2967         value = ValueForKey( &entities[ 0 ], "_keepLights" );
2968         if ( value[ 0 ] != '1' ) {
2969                 LoadMapFile( mapSource, qtrue, qfalse );
2970         }
2971
2972         /* set the entity/model origins and init yDrawVerts */
2973         SetEntityOrigins();
2974
2975         /* ydnar: set up optimization */
2976         SetupBrushes();
2977         SetupDirt();
2978         SetupFloodLight();
2979         SetupSurfaceLightmaps();
2980
2981         /* initialize the surface facet tracing */
2982         SetupTraceNodes();
2983
2984         /* light the world */
2985         LightWorld();
2986
2987         /* ydnar: store off lightmaps */
2988         StoreSurfaceLightmaps();
2989
2990         /* write out the bsp */
2991         UnparseEntities();
2992         Sys_Printf( "Writing %s\n", source );
2993         WriteBSPFile( source );
2994
2995         /* ydnar: export lightmaps */
2996         if ( exportLightmaps && !externalLightmaps ) {
2997                 ExportLightmaps();
2998         }
2999
3000         /* return to sender */
3001         return 0;
3002 }