tools/quake3/q3map2/light_ydnar.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_YDNAR_C
  33
  34
  35
  36 /* dependencies */
  37 #include "q3map2.h"
  38
  39
  40
  41
  42 /*
  43 ColorToBytes()
  44 ydnar: moved to here 2001-02-04
  45 */
  46
  47 void ColorToBytes( const float *color, byte *colorBytes, float scale )
  48 {
  49         int             i;
  50         float   max, gamma;
  51         vec3_t  sample;
  52         float   inv, dif;
  53
  54
  55         /* ydnar: scaling necessary for simulating r_overbrightBits on external lightmaps */
  56         if( scale <= 0.0f )
  57                 scale = 1.0f;
  58
  59         /* make a local copy */
  60         VectorScale( color, scale, sample );
  61
  62         /* muck with it */
  63         gamma = 1.0f / lightmapGamma;
  64         for( i = 0; i < 3; i++ )
  65         {
  66                 /* handle negative light */
  67                 if( sample[ i ] < 0.0f )
  68                 {
  69                         sample[ i ] = 0.0f;
  70                         continue;
  71                 }
  72
  73                 /* gamma */
  74                 sample[ i ] = pow( sample[ i ] / 255.0f, gamma ) * 255.0f;
  75         }
  76
  77         if (lightmapExposure == 1)
  78         {
  79                 /* clamp with color normalization */
  80                 max = sample[ 0 ];
  81                 if( sample[ 1 ] > max )
  82                         max = sample[ 1 ];
  83                 if( sample[ 2 ] > max )
  84                         max = sample[ 2 ];
  85                 if( max > 255.0f )
  86                         VectorScale( sample, (255.0f / max), sample );
  87         }
  88         else
  89         {
  90                 if (lightmapExposure==0)
  91                 {
  92                         lightmapExposure=1.0f;
  93                 }
  94                 inv=1.f/lightmapExposure;
  95                 //Exposure
  96
  97                 max = sample[ 0 ];
  98                 if( sample[ 1 ] > max )
  99                         max = sample[ 1 ];
 100                 if( sample[ 2 ] > max )
 101                         max = sample[ 2 ];
 102
 103                 dif = (1-  exp(-max * inv) )  *  255;
 104
 105                 if (max >0)
 106                 {
 107                         dif = dif / max;
 108                 }
 109                 else
 110                 {
 111                         dif = 0;
 112                 }
 113
 114                 for (i=0;i<3;i++)
 115                 {
 116                         sample[i]*=dif;
 117                 }
 118         }
 119
 120
 121         /* compensate for ingame overbrighting/bitshifting */
 122         VectorScale( sample, (1.0f / lightmapCompensate), sample );
 123
 124         /* store it off */
 125         colorBytes[ 0 ] = sample[ 0 ];
 126         colorBytes[ 1 ] = sample[ 1 ];
 127         colorBytes[ 2 ] = sample[ 2 ];
 128 }
 129
 130
 131
 132 /* -------------------------------------------------------------------------------
 133
 134 this section deals with phong shading (normal interpolation across brush faces)
 135
 136 ------------------------------------------------------------------------------- */
 137
 138 /*
 139 SmoothNormals()
 140 smooths together coincident vertex normals across the bsp
 141 */
 142
 143 #define MAX_SAMPLES                             256
 144 #define THETA_EPSILON                   0.000001
 145 #define EQUAL_NORMAL_EPSILON    0.01
 146
 147 void SmoothNormals( void )
 148 {
 149         int                                     i, j, k, f, cs, numVerts, numVotes, fOld, start;
 150         float                           shadeAngle, defaultShadeAngle, maxShadeAngle, dot, testAngle;
 151         bspDrawSurface_t        *ds;
 152         shaderInfo_t            *si;
 153         float                           *shadeAngles;
 154         byte                            *smoothed;
 155         vec3_t                          average, diff;
 156         int                                     indexes[ MAX_SAMPLES ];
 157         vec3_t                          votes[ MAX_SAMPLES ];
 158
 159
 160         /* allocate shade angle table */
 161         shadeAngles = safe_malloc( numBSPDrawVerts * sizeof( float ) );
 162         memset( shadeAngles, 0, numBSPDrawVerts * sizeof( float ) );
 163
 164         /* allocate smoothed table */
 165         cs = (numBSPDrawVerts / 8) + 1;
 166         smoothed = safe_malloc( cs );
 167         memset( smoothed, 0, cs );
 168
 169         /* set default shade angle */
 170         defaultShadeAngle = DEG2RAD( shadeAngleDegrees );
 171         maxShadeAngle = 0;
 172
 173         /* run through every surface and flag verts belonging to non-lightmapped surfaces
 174            and set per-vertex smoothing angle */
 175         for( i = 0; i < numBSPDrawSurfaces; i++ )
 176         {
 177                 /* get drawsurf */
 178                 ds = &bspDrawSurfaces[ i ];
 179
 180                 /* get shader for shade angle */
 181                 si = surfaceInfos[ i ].si;
 182                 if( si->shadeAngleDegrees )
 183                         shadeAngle = DEG2RAD( si->shadeAngleDegrees );
 184                 else
 185                         shadeAngle = defaultShadeAngle;
 186                 if( shadeAngle > maxShadeAngle )
 187                         maxShadeAngle = shadeAngle;
 188
 189                 /* flag its verts */
 190                 for( j = 0; j < ds->numVerts; j++ )
 191                 {
 192                         f = ds->firstVert + j;
 193                         shadeAngles[ f ] = shadeAngle;
 194                         if( ds->surfaceType == MST_TRIANGLE_SOUP )
 195                                 smoothed[ f >> 3 ] |= (1 << (f & 7));
 196                 }
 197
 198                 /* ydnar: optional force-to-trisoup */
 199                 if( trisoup && ds->surfaceType == MST_PLANAR )
 200                 {
 201                         ds->surfaceType = MST_TRIANGLE_SOUP;
 202                         ds->lightmapNum[ 0 ] = -3;
 203                 }
 204         }
 205
 206         /* bail if no surfaces have a shade angle */
 207         if( maxShadeAngle == 0 )
 208         {
 209                 free( shadeAngles );
 210                 free( smoothed );
 211                 return;
 212         }
 213
 214         /* init pacifier */
 215         fOld = -1;
 216         start = I_FloatTime();
 217
 218         /* go through the list of vertexes */
 219         for( i = 0; i < numBSPDrawVerts; i++ )
 220         {
 221                 /* print pacifier */
 222                 f = 10 * i / numBSPDrawVerts;
 223                 if( f != fOld )
 224                 {
 225                         fOld = f;
 226                         Sys_Printf( "%i...", f );
 227                 }
 228
 229                 /* already smoothed? */
 230                 if( smoothed[ i >> 3 ] & (1 << (i & 7)) )
 231                         continue;
 232
 233                 /* clear */
 234                 VectorClear( average );
 235                 numVerts = 0;
 236                 numVotes = 0;
 237
 238                 /* build a table of coincident vertexes */
 239                 for( j = i; j < numBSPDrawVerts && numVerts < MAX_SAMPLES; j++ )
 240                 {
 241                         /* already smoothed? */
 242                         if( smoothed[ j >> 3 ] & (1 << (j & 7)) )
 243                                 continue;
 244
 245                         /* test vertexes */
 246                         if( VectorCompare( yDrawVerts[ i ].xyz, yDrawVerts[ j ].xyz ) == qfalse )
 247                                 continue;
 248
 249                         /* use smallest shade angle */
 250                         shadeAngle = (shadeAngles[ i ] < shadeAngles[ j ] ? shadeAngles[ i ] : shadeAngles[ j ]);
 251
 252                         /* check shade angle */
 253                         dot = DotProduct( bspDrawVerts[ i ].normal, bspDrawVerts[ j ].normal );
 254                         if( dot > 1.0 )
 255                                 dot = 1.0;
 256                         else if( dot < -1.0 )
 257                                 dot = -1.0;
 258                         testAngle = acos( dot ) + THETA_EPSILON;
 259                         if( testAngle >= shadeAngle )
 260                         {
 261                                 //Sys_Printf( "F(%3.3f >= %3.3f) ", RAD2DEG( testAngle ), RAD2DEG( shadeAngle ) );
 262                                 continue;
 263                         }
 264                         //Sys_Printf( "P(%3.3f < %3.3f) ", RAD2DEG( testAngle ), RAD2DEG( shadeAngle ) );
 265
 266                         /* add to the list */
 267                         indexes[ numVerts++ ] = j;
 268
 269                         /* flag vertex */
 270                         smoothed[ j >> 3 ] |= (1 << (j & 7));
 271
 272                         /* see if this normal has already been voted */
 273                         for( k = 0; k < numVotes; k++ )
 274                         {
 275                                 VectorSubtract( bspDrawVerts[ j ].normal, votes[ k ], diff );
 276                                 if( fabs( diff[ 0 ] ) < EQUAL_NORMAL_EPSILON &&
 277                                         fabs( diff[ 1 ] ) < EQUAL_NORMAL_EPSILON &&
 278                                         fabs( diff[ 2 ] ) < EQUAL_NORMAL_EPSILON )
 279                                         break;
 280                         }
 281
 282                         /* add a new vote? */
 283                         if( k == numVotes && numVotes < MAX_SAMPLES )
 284                         {
 285                                 VectorAdd( average, bspDrawVerts[ j ].normal, average );
 286                                 VectorCopy( bspDrawVerts[ j ].normal, votes[ numVotes ] );
 287                                 numVotes++;
 288                         }
 289                 }
 290
 291                 /* don't average for less than 2 verts */
 292                 if( numVerts < 2 )
 293                         continue;
 294
 295                 /* average normal */
 296                 if( VectorNormalize( average, average ) > 0 )
 297                 {
 298                         /* smooth */
 299                         for( j = 0; j < numVerts; j++ )
 300                                 VectorCopy( average, yDrawVerts[ indexes[ j ] ].normal );
 301                 }
 302         }
 303
 304         /* free the tables */
 305         free( shadeAngles );
 306         free( smoothed );
 307
 308         /* print time */
 309         Sys_Printf( " (%i)\n", (int) (I_FloatTime() - start) );
 310 }
 311
 312
 313
 314 /* -------------------------------------------------------------------------------
 315
 316 this section deals with phong shaded lightmap tracing
 317
 318 ------------------------------------------------------------------------------- */
 319
 320 /* 9th rewrite (recursive subdivision of a lightmap triangle) */
 321
 322 /*
 323 CalcTangentVectors()
 324 calculates the st tangent vectors for normalmapping
 325 */
 326
 327 static qboolean CalcTangentVectors( int numVerts, bspDrawVert_t **dv, vec3_t *stv, vec3_t *ttv )
 328 {
 329         int                     i;
 330         float           bb, s, t;
 331         vec3_t          bary;
 332
 333
 334         /* calculate barycentric basis for the triangle */
 335         bb = (dv[ 1 ]->st[ 0 ] - dv[ 0 ]->st[ 0 ]) * (dv[ 2 ]->st[ 1 ] - dv[ 0 ]->st[ 1 ]) - (dv[ 2 ]->st[ 0 ] - dv[ 0 ]->st[ 0 ]) * (dv[ 1 ]->st[ 1 ] - dv[ 0 ]->st[ 1 ]);
 336         if( fabs( bb ) < 0.00000001f )
 337                 return qfalse;
 338
 339         /* do each vertex */
 340         for( i = 0; i < numVerts; i++ )
 341         {
 342                 /* calculate s tangent vector */
 343                 s = dv[ i ]->st[ 0 ] + 10.0f;
 344                 t = dv[ i ]->st[ 1 ];
 345                 bary[ 0 ] = ((dv[ 1 ]->st[ 0 ] - s) * (dv[ 2 ]->st[ 1 ] - t) - (dv[ 2 ]->st[ 0 ] - s) * (dv[ 1 ]->st[ 1 ] - t)) / bb;
 346                 bary[ 1 ] = ((dv[ 2 ]->st[ 0 ] - s) * (dv[ 0 ]->st[ 1 ] - t) - (dv[ 0 ]->st[ 0 ] - s) * (dv[ 2 ]->st[ 1 ] - t)) / bb;
 347                 bary[ 2 ] = ((dv[ 0 ]->st[ 0 ] - s) * (dv[ 1 ]->st[ 1 ] - t) - (dv[ 1 ]->st[ 0 ] - s) * (dv[ 0 ]->st[ 1 ] - t)) / bb;
 348
 349                 stv[ i ][ 0 ] = bary[ 0 ] * dv[ 0 ]->xyz[ 0 ] + bary[ 1 ] * dv[ 1 ]->xyz[ 0 ] + bary[ 2 ] * dv[ 2 ]->xyz[ 0 ];
 350                 stv[ i ][ 1 ] = bary[ 0 ] * dv[ 0 ]->xyz[ 1 ] + bary[ 1 ] * dv[ 1 ]->xyz[ 1 ] + bary[ 2 ] * dv[ 2 ]->xyz[ 1 ];
 351                 stv[ i ][ 2 ] = bary[ 0 ] * dv[ 0 ]->xyz[ 2 ] + bary[ 1 ] * dv[ 1 ]->xyz[ 2 ] + bary[ 2 ] * dv[ 2 ]->xyz[ 2 ];
 352
 353                 VectorSubtract( stv[ i ], dv[ i ]->xyz, stv[ i ] );
 354                 VectorNormalize( stv[ i ], stv[ i ] );
 355
 356                 /* calculate t tangent vector */
 357                 s = dv[ i ]->st[ 0 ];
 358                 t = dv[ i ]->st[ 1 ] + 10.0f;
 359                 bary[ 0 ] = ((dv[ 1 ]->st[ 0 ] - s) * (dv[ 2 ]->st[ 1 ] - t) - (dv[ 2 ]->st[ 0 ] - s) * (dv[ 1 ]->st[ 1 ] - t)) / bb;
 360                 bary[ 1 ] = ((dv[ 2 ]->st[ 0 ] - s) * (dv[ 0 ]->st[ 1 ] - t) - (dv[ 0 ]->st[ 0 ] - s) * (dv[ 2 ]->st[ 1 ] - t)) / bb;
 361                 bary[ 2 ] = ((dv[ 0 ]->st[ 0 ] - s) * (dv[ 1 ]->st[ 1 ] - t) - (dv[ 1 ]->st[ 0 ] - s) * (dv[ 0 ]->st[ 1 ] - t)) / bb;
 362
 363                 ttv[ i ][ 0 ] = bary[ 0 ] * dv[ 0 ]->xyz[ 0 ] + bary[ 1 ] * dv[ 1 ]->xyz[ 0 ] + bary[ 2 ] * dv[ 2 ]->xyz[ 0 ];
 364                 ttv[ i ][ 1 ] = bary[ 0 ] * dv[ 0 ]->xyz[ 1 ] + bary[ 1 ] * dv[ 1 ]->xyz[ 1 ] + bary[ 2 ] * dv[ 2 ]->xyz[ 1 ];
 365                 ttv[ i ][ 2 ] = bary[ 0 ] * dv[ 0 ]->xyz[ 2 ] + bary[ 1 ] * dv[ 1 ]->xyz[ 2 ] + bary[ 2 ] * dv[ 2 ]->xyz[ 2 ];
 366
 367                 VectorSubtract( ttv[ i ], dv[ i ]->xyz, ttv[ i ] );
 368                 VectorNormalize( ttv[ i ], ttv[ i ] );
 369
 370                 /* debug code */
 371                 //%     Sys_FPrintf( SYS_VRB, "%d S: (%f %f %f) T: (%f %f %f)\n", i,
 372                 //%             stv[ i ][ 0 ], stv[ i ][ 1 ], stv[ i ][ 2 ], ttv[ i ][ 0 ], ttv[ i ][ 1 ], ttv[ i ][ 2 ] );
 373         }
 374
 375         /* return to caller */
 376         return qtrue;
 377 }
 378
 379
 380
 381
 382 /*
 383 PerturbNormal()
 384 perterbs the normal by the shader's normalmap in tangent space
 385 */
 386
 387 static void PerturbNormal( bspDrawVert_t *dv, shaderInfo_t *si, vec3_t pNormal, vec3_t stv[ 3 ], vec3_t ttv[ 3 ] )
 388 {
 389         int                     i;
 390         vec4_t          bump;
 391
 392
 393         /* passthrough */
 394         VectorCopy( dv->normal, pNormal );
 395
 396         /* sample normalmap */
 397         if( RadSampleImage( si->normalImage->pixels, si->normalImage->width, si->normalImage->height, dv->st, bump ) == qfalse )
 398                 return;
 399
 400         /* remap sampled normal from [0,255] to [-1,-1] */
 401         for( i = 0; i < 3; i++ )
 402                 bump[ i ] = (bump[ i ] - 127.0f) * (1.0f / 127.5f);
 403
 404         /* scale tangent vectors and add to original normal */
 405         VectorMA( dv->normal, bump[ 0 ], stv[ 0 ], pNormal );
 406         VectorMA( pNormal, bump[ 1 ], ttv[ 0 ], pNormal );
 407         VectorMA( pNormal, bump[ 2 ], dv->normal, pNormal );
 408
 409         /* renormalize and return */
 410         VectorNormalize( pNormal, pNormal );
 411 }
 412
 413
 414
 415 /*
 416 MapSingleLuxel()
 417 maps a luxel for triangle bv at
 418 */
 419
 420 #define NUDGE                   0.5f
 421 #define BOGUS_NUDGE             -99999.0f
 422
 423 static int MapSingleLuxel( rawLightmap_t *lm, surfaceInfo_t *info, bspDrawVert_t *dv, vec4_t plane, float pass, vec3_t stv[ 3 ], vec3_t ttv[ 3 ], vec3_t worldverts[ 3 ] )
 424 {
 425         int                             i, x, y, numClusters, *clusters, pointCluster, *cluster;
 426         float                   *luxel, *origin, *normal, d, lightmapSampleOffset;
 427         shaderInfo_t    *si;
 428         vec3_t                  pNormal;
 429         vec3_t                  vecs[ 3 ];
 430         vec3_t                  nudged;
 431         vec3_t                  cverts[ 3 ];
 432         vec3_t                  temp;
 433         vec4_t                  sideplane, hostplane;
 434         vec3_t                  origintwo;
 435         int                             j, next;
 436         float                   e;
 437         float                   *nudge;
 438         static float    nudges[][ 2 ] =
 439                                         {
 440                                                 //%{ 0, 0 },            /* try center first */
 441                                                 { -NUDGE, 0 },          /* left */
 442                                                 { NUDGE, 0 },           /* right */
 443                                                 { 0, NUDGE },           /* up */
 444                                                 { 0, -NUDGE },          /* down */
 445                                                 { -NUDGE, NUDGE },      /* left/up */
 446                                                 { NUDGE, -NUDGE },      /* right/down */
 447                                                 { NUDGE, NUDGE },       /* right/up */
 448                                                 { -NUDGE, -NUDGE },     /* left/down */
 449                                                 { BOGUS_NUDGE, BOGUS_NUDGE }
 450                                         };
 451
 452
 453         /* find luxel xy coords (fixme: subtract 0.5?) */
 454         x = dv->lightmap[ 0 ][ 0 ];
 455         y = dv->lightmap[ 0 ][ 1 ];
 456         if( x < 0 )
 457                 x = 0;
 458         else if( x >= lm->sw )
 459                 x = lm->sw - 1;
 460         if( y < 0 )
 461                 y = 0;
 462         else if( y >= lm->sh )
 463                 y = lm->sh - 1;
 464
 465         /* set shader and cluster list */
 466         if( info != NULL )
 467         {
 468                 si = info->si;
 469                 numClusters = info->numSurfaceClusters;
 470                 clusters = &surfaceClusters[ info->firstSurfaceCluster ];
 471         }
 472         else
 473         {
 474                 si = NULL;
 475                 numClusters = 0;
 476                 clusters = NULL;
 477         }
 478
 479         /* get luxel, origin, cluster, and normal */
 480         luxel = SUPER_LUXEL( 0, x, y );
 481         origin = SUPER_ORIGIN( x, y );
 482         normal = SUPER_NORMAL( x, y );
 483         cluster = SUPER_CLUSTER( x, y );
 484
 485         /* don't attempt to remap occluded luxels for planar surfaces */
 486         if( (*cluster) == CLUSTER_OCCLUDED && lm->plane != NULL )
 487                 return (*cluster);
 488
 489         /* only average the normal for premapped luxels */
 490         else if( (*cluster) >= 0 )
 491         {
 492                 /* do bumpmap calculations */
 493                 if( stv != NULL )
 494                         PerturbNormal( dv, si, pNormal, stv, ttv );
 495                 else
 496                         VectorCopy( dv->normal, pNormal );
 497
 498                 /* add the additional normal data */
 499                 VectorAdd( normal, pNormal, normal );
 500                 luxel[ 3 ] += 1.0f;
 501                 return (*cluster);
 502         }
 503
 504         /* otherwise, unmapped luxels (*cluster == CLUSTER_UNMAPPED) will have their full attributes calculated */
 505
 506         /* get origin */
 507
 508         /* axial lightmap projection */
 509         if( lm->vecs != NULL )
 510         {
 511                 /* calculate an origin for the sample from the lightmap vectors */
 512                 VectorCopy( lm->origin, origin );
 513                 for( i = 0; i < 3; i++ )
 514                 {
 515                         /* add unless it's the axis, which is taken care of later */
 516                         if( i == lm->axisNum )
 517                                 continue;
 518                         origin[ i ] += (x * lm->vecs[ 0 ][ i ]) + (y * lm->vecs[ 1 ][ i ]);
 519                 }
 520
 521                 /* project the origin onto the plane */
 522                 d = DotProduct( origin, plane ) - plane[ 3 ];
 523                 d /= plane[ lm->axisNum ];
 524                 origin[ lm->axisNum ] -= d;
 525         }
 526
 527         /* non axial lightmap projection (explicit xyz) */
 528         else
 529                 VectorCopy( dv->xyz, origin );
 530
 531         //////////////////////
 532         //27's test to make sure samples stay within the triangle boundaries
 533         //1) Test the sample origin to see if it lays on the wrong side of any edge (x/y)
 534         //2) if it does, nudge it onto the correct side.
 535
 536         if (worldverts!=NULL && lightmapTriangleCheck)
 537         {
 538                 for (j=0;j<3;j++)
 539                 {
 540                         VectorCopy(worldverts[j],cverts[j]);
 541                 }
 542                 PlaneFromPoints(hostplane,cverts[0],cverts[1],cverts[2]);
 543
 544                 for (j=0;j<3;j++)
 545                 {
 546                         for (i=0;i<3;i++)
 547                         {
 548                                 //build plane using 2 edges and a normal
 549                                 next=(i+1)%3;
 550
 551                                 VectorCopy(cverts[next],temp);
 552                                 VectorAdd(temp,hostplane,temp);
 553                                 PlaneFromPoints(sideplane,cverts[i],cverts[ next ], temp);
 554
 555                                 //planetest sample point
 556                                 e=DotProduct(origin,sideplane);
 557                                 e=e-sideplane[3];
 558                                 if (e>0)
 559                                 {
 560                                         //we're bad.
 561                                         //VectorClear(origin);
 562                                         //Move the sample point back inside triangle bounds
 563                                         origin[0]-=sideplane[0]*(e+1);
 564                                         origin[1]-=sideplane[1]*(e+1);
 565                                         origin[2]-=sideplane[2]*(e+1);
 566 #ifdef DEBUG_27_1
 567                                         VectorClear(origin);
 568 #endif
 569                                 }
 570                         }
 571                 }
 572         }
 573
 574         ////////////////////////
 575
 576         /* planar surfaces have precalculated lightmap vectors for nudging */
 577         if( lm->plane != NULL )
 578         {
 579                 VectorCopy( lm->vecs[ 0 ], vecs[ 0 ] );
 580                 VectorCopy( lm->vecs[ 1 ], vecs[ 1 ] );
 581                 VectorCopy( lm->plane, vecs[ 2 ] );
 582         }
 583
 584         /* non-planar surfaces must calculate them */
 585         else
 586         {
 587                 if( plane != NULL )
 588                         VectorCopy( plane, vecs[ 2 ] );
 589                 else
 590                         VectorCopy( dv->normal, vecs[ 2 ] );
 591                 MakeNormalVectors( vecs[ 2 ], vecs[ 0 ], vecs[ 1 ] );
 592         }
 593
 594         /* push the origin off the surface a bit */
 595         if( si != NULL )
 596                 lightmapSampleOffset = si->lightmapSampleOffset;
 597         else
 598                 lightmapSampleOffset = DEFAULT_LIGHTMAP_SAMPLE_OFFSET;
 599         if( lm->axisNum < 0 )
 600                 VectorMA( origin, lightmapSampleOffset, vecs[ 2 ], origin );
 601         else if( vecs[ 2 ][ lm->axisNum ] < 0.0f )
 602                 origin[ lm->axisNum ] -= lightmapSampleOffset;
 603         else
 604                 origin[ lm->axisNum ] += lightmapSampleOffset;
 605
 606         VectorCopy(origin,origintwo);
 607         if(lightmapExtraVisClusterNudge)
 608         {
 609                 origintwo[0]+=vecs[2][0];
 610                 origintwo[1]+=vecs[2][1];
 611                 origintwo[2]+=vecs[2][2];
 612         }
 613
 614         /* get cluster */
 615         pointCluster = ClusterForPointExtFilter( origintwo, LUXEL_EPSILON, numClusters, clusters );
 616
 617         /* another retarded hack, storing nudge count in luxel[ 1 ] */
 618         luxel[ 1 ] = 0.0f;
 619
 620         /* point in solid? (except in dark mode) */
 621         if( pointCluster < 0 && dark == qfalse )
 622         {
 623                 /* nudge the the location around */
 624                 nudge = nudges[ 0 ];
 625                 while( nudge[ 0 ] > BOGUS_NUDGE && pointCluster < 0 )
 626                 {
 627                         /* nudge the vector around a bit */
 628                         for( i = 0; i < 3; i++ )
 629                         {
 630                                 /* set nudged point*/
 631                                 nudged[ i ] = origintwo[ i ] + (nudge[ 0 ] * vecs[ 0 ][ i ]) + (nudge[ 1 ] * vecs[ 1 ][ i ]);
 632                         }
 633                         nudge += 2;
 634
 635                         /* get pvs cluster */
 636                         pointCluster = ClusterForPointExtFilter( nudged, LUXEL_EPSILON, numClusters, clusters ); //% + 0.625 );
 637                         if( pointCluster >= 0 )
 638                                 VectorCopy( nudged, origin );
 639                         luxel[ 1 ] += 1.0f;
 640                 }
 641         }
 642
 643         /* as a last resort, if still in solid, try drawvert origin offset by normal (except in dark mode) */
 644         if( pointCluster < 0 && si != NULL && dark == qfalse )
 645         {
 646                 VectorMA( dv->xyz, lightmapSampleOffset, dv->normal, nudged );
 647                 pointCluster = ClusterForPointExtFilter( nudged, LUXEL_EPSILON, numClusters, clusters );
 648                 if( pointCluster >= 0 )
 649                         VectorCopy( nudged, origin );
 650                 luxel[ 1 ] += 1.0f;
 651         }
 652
 653         /* valid? */
 654         if( pointCluster < 0 )
 655         {
 656                 (*cluster) = CLUSTER_OCCLUDED;
 657                 VectorClear( origin );
 658                 VectorClear( normal );
 659                 numLuxelsOccluded++;
 660                 return (*cluster);
 661         }
 662
 663         /* debug code */
 664         //%     Sys_Printf( "%f %f %f\n", origin[ 0 ], origin[ 1 ], origin[ 2 ] );
 665
 666         /* do bumpmap calculations */
 667         if( stv )
 668                 PerturbNormal( dv, si, pNormal, stv, ttv );
 669         else
 670                 VectorCopy( dv->normal, pNormal );
 671
 672         /* store the cluster and normal */
 673         (*cluster) = pointCluster;
 674         VectorCopy( pNormal, normal );
 675
 676         /* store explicit mapping pass and implicit mapping pass */
 677         luxel[ 0 ] = pass;
 678         luxel[ 3 ] = 1.0f;
 679
 680         /* add to count */
 681         numLuxelsMapped++;
 682
 683         /* return ok */
 684         return (*cluster);
 685 }
 686
 687
 688
 689 /*
 690 MapTriangle_r()
 691 recursively subdivides a triangle until its edges are shorter
 692 than the distance between two luxels (thanks jc :)
 693 */
 694
 695 static void MapTriangle_r( rawLightmap_t *lm, surfaceInfo_t *info, bspDrawVert_t *dv[ 3 ], vec4_t plane, vec3_t stv[ 3 ], vec3_t ttv[ 3 ], vec3_t worldverts[ 3 ] )
 696 {
 697         bspDrawVert_t   mid, *dv2[ 3 ];
 698         int                             max;
 699
 700
 701         /* map the vertexes */
 702         #if 0
 703         MapSingleLuxel( lm, info, dv[ 0 ], plane, 1, stv, ttv );
 704         MapSingleLuxel( lm, info, dv[ 1 ], plane, 1, stv, ttv );
 705         MapSingleLuxel( lm, info, dv[ 2 ], plane, 1, stv, ttv );
 706         #endif
 707
 708         /* subdivide calc */
 709         {
 710                 int                     i;
 711                 float           *a, *b, dx, dy, dist, maxDist;
 712
 713
 714                 /* find the longest edge and split it */
 715                 max = -1;
 716                 maxDist = 0;
 717                 for( i = 0; i < 3; i++ )
 718                 {
 719                         /* get verts */
 720                         a = dv[ i ]->lightmap[ 0 ];
 721                         b = dv[ (i + 1) % 3 ]->lightmap[ 0 ];
 722
 723                         /* get dists */
 724                         dx = a[ 0 ] - b[ 0 ];
 725                         dy = a[ 1 ] - b[ 1 ];
 726                         dist = (dx * dx) + (dy * dy);   //% sqrt( (dx * dx) + (dy * dy) );
 727
 728                         /* longer? */
 729                         if( dist > maxDist )
 730                         {
 731                                 maxDist = dist;
 732                                 max = i;
 733                         }
 734                 }
 735
 736                 /* try to early out */
 737                 if( max < 0 || maxDist <= subdivideThreshold )  /* ydnar: was i < 0 instead of max < 0 (?) */
 738                         return;
 739         }
 740
 741         /* split the longest edge and map it */
 742         LerpDrawVert( dv[ max ], dv[ (max + 1) % 3 ], &mid );
 743         MapSingleLuxel( lm, info, &mid, plane, 1, stv, ttv, worldverts );
 744
 745         /* push the point up a little bit to account for fp creep (fixme: revisit this) */
 746         //%     VectorMA( mid.xyz, 2.0f, mid.normal, mid.xyz );
 747
 748         /* recurse to first triangle */
 749         VectorCopy( dv, dv2 );
 750         dv2[ max ] = &mid;
 751         MapTriangle_r( lm, info, dv2, plane, stv, ttv, worldverts );
 752
 753         /* recurse to second triangle */
 754         VectorCopy( dv, dv2 );
 755         dv2[ (max + 1) % 3 ] = &mid;
 756         MapTriangle_r( lm, info, dv2, plane, stv, ttv, worldverts );
 757 }
 758
 759
 760
 761 /*
 762 MapTriangle()
 763 seed function for MapTriangle_r()
 764 requires a cw ordered triangle
 765 */
 766
 767 static qboolean MapTriangle( rawLightmap_t *lm, surfaceInfo_t *info, bspDrawVert_t *dv[ 3 ], qboolean mapNonAxial )
 768 {
 769         int                             i;
 770         vec4_t                  plane;
 771         vec3_t                  *stv, *ttv, stvStatic[ 3 ], ttvStatic[ 3 ];
 772         vec3_t                  worldverts[ 3 ];
 773
 774
 775         /* get plane if possible */
 776         if( lm->plane != NULL )
 777         {
 778                 VectorCopy( lm->plane, plane );
 779                 plane[ 3 ] = lm->plane[ 3 ];
 780         }
 781
 782         /* otherwise make one from the points */
 783         else if( PlaneFromPoints( plane, dv[ 0 ]->xyz, dv[ 1 ]->xyz, dv[ 2 ]->xyz ) == qfalse )
 784                 return qfalse;
 785
 786         /* check to see if we need to calculate texture->world tangent vectors */
 787         if( info->si->normalImage != NULL && CalcTangentVectors( 3, dv, stvStatic, ttvStatic ) )
 788         {
 789                 stv = stvStatic;
 790                 ttv = ttvStatic;
 791         }
 792         else
 793         {
 794                 stv = NULL;
 795                 ttv = NULL;
 796         }
 797
 798         VectorCopy( dv[ 0 ]->xyz, worldverts[ 0 ] );
 799         VectorCopy( dv[ 1 ]->xyz, worldverts[ 1 ] );
 800         VectorCopy( dv[ 2 ]->xyz, worldverts[ 2 ] );
 801
 802         /* map the vertexes */
 803         MapSingleLuxel( lm, info, dv[ 0 ], plane, 1, stv, ttv, worldverts );
 804         MapSingleLuxel( lm, info, dv[ 1 ], plane, 1, stv, ttv, worldverts );
 805         MapSingleLuxel( lm, info, dv[ 2 ], plane, 1, stv, ttv, worldverts );
 806
 807         /* 2002-11-20: prefer axial triangle edges */
 808         if( mapNonAxial )
 809         {
 810                 /* subdivide the triangle */
 811                 MapTriangle_r( lm, info, dv, plane, stv, ttv, worldverts );
 812                 return qtrue;
 813         }
 814
 815         for( i = 0; i < 3; i++ )
 816         {
 817                 float                   *a, *b;
 818                 bspDrawVert_t   *dv2[ 3 ];
 819
 820
 821                 /* get verts */
 822                 a = dv[ i ]->lightmap[ 0 ];
 823                 b = dv[ (i + 1) % 3 ]->lightmap[ 0 ];
 824
 825                 /* make degenerate triangles for mapping edges */
 826                 if( fabs( a[ 0 ] - b[ 0 ] ) < 0.01f || fabs( a[ 1 ] - b[ 1 ] ) < 0.01f )
 827                 {
 828                         dv2[ 0 ] = dv[ i ];
 829                         dv2[ 1 ] = dv[ (i + 1) % 3 ];
 830                         dv2[ 2 ] = dv[ (i + 1) % 3 ];
 831
 832                         /* map the degenerate triangle */
 833                         MapTriangle_r( lm, info, dv2, plane, stv, ttv, worldverts );
 834                 }
 835         }
 836
 837         return qtrue;
 838 }
 839
 840
 841
 842 /*
 843 MapQuad_r()
 844 recursively subdivides a quad until its edges are shorter
 845 than the distance between two luxels
 846 */
 847
 848 static void MapQuad_r( rawLightmap_t *lm, surfaceInfo_t *info, bspDrawVert_t *dv[ 4 ], vec4_t plane, vec3_t stv[ 4 ], vec3_t ttv[ 4 ] )
 849 {
 850         bspDrawVert_t   mid[ 2 ], *dv2[ 4 ];
 851         int                             max;
 852
 853
 854         /* subdivide calc */
 855         {
 856                 int                     i;
 857                 float           *a, *b, dx, dy, dist, maxDist;
 858
 859
 860                 /* find the longest edge and split it */
 861                 max = -1;
 862                 maxDist = 0;
 863                 for( i = 0; i < 4; i++ )
 864                 {
 865                         /* get verts */
 866                         a = dv[ i ]->lightmap[ 0 ];
 867                         b = dv[ (i + 1) % 4 ]->lightmap[ 0 ];
 868
 869                         /* get dists */
 870                         dx = a[ 0 ] - b[ 0 ];
 871                         dy = a[ 1 ] - b[ 1 ];
 872                         dist = (dx * dx) + (dy * dy);   //% sqrt( (dx * dx) + (dy * dy) );
 873
 874                         /* longer? */
 875                         if( dist > maxDist )
 876                         {
 877                                 maxDist = dist;
 878                                 max = i;
 879                         }
 880                 }
 881
 882                 /* try to early out */
 883                 if( max < 0 || maxDist <= subdivideThreshold )
 884                         return;
 885         }
 886
 887         /* we only care about even/odd edges */
 888         max &= 1;
 889
 890         /* split the longest edges */
 891         LerpDrawVert( dv[ max ], dv[ (max + 1) % 4 ], &mid[ 0 ] );
 892         LerpDrawVert( dv[ max + 2 ], dv[ (max + 3) % 4 ], &mid[ 1 ] );
 893
 894         /* map the vertexes */
 895         MapSingleLuxel( lm, info, &mid[ 0 ], plane, 1, stv, ttv, NULL );
 896         MapSingleLuxel( lm, info, &mid[ 1 ], plane, 1, stv, ttv, NULL );
 897
 898         /* 0 and 2 */
 899         if( max == 0 )
 900         {
 901                 /* recurse to first quad */
 902                 dv2[ 0 ] = dv[ 0 ];
 903                 dv2[ 1 ] = &mid[ 0 ];
 904                 dv2[ 2 ] = &mid[ 1 ];
 905                 dv2[ 3 ] = dv[ 3 ];
 906                 MapQuad_r( lm, info, dv2, plane, stv, ttv );
 907
 908                 /* recurse to second quad */
 909                 dv2[ 0 ] = &mid[ 0 ];
 910                 dv2[ 1 ] = dv[ 1 ];
 911                 dv2[ 2 ] = dv[ 2 ];
 912                 dv2[ 3 ] = &mid[ 1 ];
 913                 MapQuad_r( lm, info, dv2, plane, stv, ttv );
 914         }
 915
 916         /* 1 and 3 */
 917         else
 918         {
 919                 /* recurse to first quad */
 920                 dv2[ 0 ] = dv[ 0 ];
 921                 dv2[ 1 ] = dv[ 1 ];
 922                 dv2[ 2 ] = &mid[ 0 ];
 923                 dv2[ 3 ] = &mid[ 1 ];
 924                 MapQuad_r( lm, info, dv2, plane, stv, ttv );
 925
 926                 /* recurse to second quad */
 927                 dv2[ 0 ] = &mid[ 1 ];
 928                 dv2[ 1 ] = &mid[ 0 ];
 929                 dv2[ 2 ] = dv[ 2 ];
 930                 dv2[ 3 ] = dv[ 3 ];
 931                 MapQuad_r( lm, info, dv2, plane, stv, ttv );
 932         }
 933 }
 934
 935
 936
 937 /*
 938 MapQuad()
 939 seed function for MapQuad_r()
 940 requires a cw ordered triangle quad
 941 */
 942
 943 #define QUAD_PLANAR_EPSILON             0.5f
 944
 945 static qboolean MapQuad( rawLightmap_t *lm, surfaceInfo_t *info, bspDrawVert_t *dv[ 4 ] )
 946 {
 947         float                   dist;
 948         vec4_t                  plane;
 949         vec3_t                  *stv, *ttv, stvStatic[ 4 ], ttvStatic[ 4 ];
 950
 951
 952         /* get plane if possible */
 953         if( lm->plane != NULL )
 954         {
 955                 VectorCopy( lm->plane, plane );
 956                 plane[ 3 ] = lm->plane[ 3 ];
 957         }
 958
 959         /* otherwise make one from the points */
 960         else if( PlaneFromPoints( plane, dv[ 0 ]->xyz, dv[ 1 ]->xyz, dv[ 2 ]->xyz ) == qfalse )
 961                 return qfalse;
 962
 963         /* 4th point must fall on the plane */
 964         dist = DotProduct( plane, dv[ 3 ]->xyz ) - plane[ 3 ];
 965         if( fabs( dist ) > QUAD_PLANAR_EPSILON )
 966                 return qfalse;
 967
 968         /* check to see if we need to calculate texture->world tangent vectors */
 969         if( info->si->normalImage != NULL && CalcTangentVectors( 4, dv, stvStatic, ttvStatic ) )
 970         {
 971                 stv = stvStatic;
 972                 ttv = ttvStatic;
 973         }
 974         else
 975         {
 976                 stv = NULL;
 977                 ttv = NULL;
 978         }
 979
 980         /* map the vertexes */
 981         MapSingleLuxel( lm, info, dv[ 0 ], plane, 1, stv, ttv, NULL );
 982         MapSingleLuxel( lm, info, dv[ 1 ], plane, 1, stv, ttv, NULL );
 983         MapSingleLuxel( lm, info, dv[ 2 ], plane, 1, stv, ttv, NULL );
 984         MapSingleLuxel( lm, info, dv[ 3 ], plane, 1, stv, ttv, NULL );
 985
 986         /* subdivide the quad */
 987         MapQuad_r( lm, info, dv, plane, stv, ttv );
 988         return qtrue;
 989 }
 990
 991
 992
 993 /*
 994 MapRawLightmap()
 995 maps the locations, normals, and pvs clusters for a raw lightmap
 996 */
 997
 998 #define VectorDivide( in, d, out )      VectorScale( in, (1.0f / (d)), out )    //%     (out)[ 0 ] = (in)[ 0 ] / (d), (out)[ 1 ] = (in)[ 1 ] / (d), (out)[ 2 ] = (in)[ 2 ] / (d)
 999
1000 void MapRawLightmap( int rawLightmapNum )
1001 {
1002         int                                     n, num, i, x, y, sx, sy, pw[ 5 ], r, *cluster, mapNonAxial;
1003         float                           *luxel, *origin, *normal, samples, radius, pass;
1004         rawLightmap_t           *lm;
1005         bspDrawSurface_t        *ds;
1006         surfaceInfo_t           *info;
1007         mesh_t                          src, *subdivided, *mesh;
1008         bspDrawVert_t           *verts, *dv[ 4 ], fake;
1009
1010
1011         /* bail if this number exceeds the number of raw lightmaps */
1012         if( rawLightmapNum >= numRawLightmaps )
1013                 return;
1014
1015         /* get lightmap */
1016         lm = &rawLightmaps[ rawLightmapNum ];
1017
1018         /* -----------------------------------------------------------------
1019            map referenced surfaces onto the raw lightmap
1020            ----------------------------------------------------------------- */
1021
1022         /* walk the list of surfaces on this raw lightmap */
1023         for( n = 0; n < lm->numLightSurfaces; n++ )
1024         {
1025                 /* with > 1 surface per raw lightmap, clear occluded */
1026                 if( n > 0 )
1027                 {
1028                         for( y = 0; y < lm->sh; y++ )
1029                         {
1030                                 for( x = 0; x < lm->sw; x++ )
1031                                 {
1032                                         /* get cluster */
1033                                         cluster = SUPER_CLUSTER( x, y );
1034                                         if( *cluster < 0 )
1035                                                 *cluster = CLUSTER_UNMAPPED;
1036                                 }
1037                         }
1038                 }
1039
1040                 /* get surface */
1041                 num = lightSurfaces[ lm->firstLightSurface + n ];
1042                 ds = &bspDrawSurfaces[ num ];
1043                 info = &surfaceInfos[ num ];
1044
1045                 /* bail if no lightmap to calculate */
1046                 if( info->lm != lm )
1047                 {
1048                         Sys_Printf( "!" );
1049                         continue;
1050                 }
1051
1052                 /* map the surface onto the lightmap origin/cluster/normal buffers */
1053                 switch( ds->surfaceType )
1054                 {
1055                         case MST_PLANAR:
1056                                 /* get verts */
1057                                 verts = yDrawVerts + ds->firstVert;
1058
1059                                 /* map the triangles */
1060                                 for( mapNonAxial = 0; mapNonAxial < 2; mapNonAxial++ )
1061                                 {
1062                                         for( i = 0; i < ds->numIndexes; i += 3 )
1063                                         {
1064                                                 dv[ 0 ] = &verts[ bspDrawIndexes[ ds->firstIndex + i ] ];
1065                                                 dv[ 1 ] = &verts[ bspDrawIndexes[ ds->firstIndex + i + 1 ] ];
1066                                                 dv[ 2 ] = &verts[ bspDrawIndexes[ ds->firstIndex + i + 2 ] ];
1067                                                 MapTriangle( lm, info, dv, mapNonAxial );
1068                                         }
1069                                 }
1070                                 break;
1071
1072                         case MST_PATCH:
1073                                 /* make a mesh from the drawsurf */
1074                                 src.width = ds->patchWidth;
1075                                 src.height = ds->patchHeight;
1076                                 src.verts = &yDrawVerts[ ds->firstVert ];
1077                                 //%     subdivided = SubdivideMesh( src, 8, 512 );
1078                                 subdivided = SubdivideMesh2( src, info->patchIterations );
1079
1080                                 /* fit it to the curve and remove colinear verts on rows/columns */
1081                                 PutMeshOnCurve( *subdivided );
1082                                 mesh = RemoveLinearMeshColumnsRows( subdivided );
1083                                 FreeMesh( subdivided );
1084
1085                                 /* get verts */
1086                                 verts = mesh->verts;
1087
1088                                 /* debug code */
1089                                 #if 0
1090                                         if( lm->plane )
1091                                         {
1092                                                 Sys_Printf( "Planar patch: [%1.3f %1.3f %1.3f] [%1.3f %1.3f %1.3f] [%1.3f %1.3f %1.3f]\n",
1093                                                         lm->plane[ 0 ], lm->plane[ 1 ], lm->plane[ 2 ],
1094                                                         lm->vecs[ 0 ][ 0 ], lm->vecs[ 0 ][ 1 ], lm->vecs[ 0 ][ 2 ],
1095                                                         lm->vecs[ 1 ][ 0 ], lm->vecs[ 1 ][ 1 ], lm->vecs[ 1 ][ 2 ] );
1096                                         }
1097                                 #endif
1098
1099                                 /* map the mesh quads */
1100                                 #if 0
1101
1102                                 for( mapNonAxial = 0; mapNonAxial < 2; mapNonAxial++ )
1103                                 {
1104                                         for( y = 0; y < (mesh->height - 1); y++ )
1105                                         {
1106                                                 for( x = 0; x < (mesh->width - 1); x++ )
1107                                                 {
1108                                                         /* set indexes */
1109                                                         pw[ 0 ] = x + (y * mesh->width);
1110                                                         pw[ 1 ] = x + ((y + 1) * mesh->width);
1111                                                         pw[ 2 ] = x + 1 + ((y + 1) * mesh->width);
1112                                                         pw[ 3 ] = x + 1 + (y * mesh->width);
1113                                                         pw[ 4 ] = x + (y * mesh->width);        /* same as pw[ 0 ] */
1114
1115                                                         /* set radix */
1116                                                         r = (x + y) & 1;
1117
1118                                                         /* get drawverts and map first triangle */
1119                                                         dv[ 0 ] = &verts[ pw[ r + 0 ] ];
1120                                                         dv[ 1 ] = &verts[ pw[ r + 1 ] ];
1121                                                         dv[ 2 ] = &verts[ pw[ r + 2 ] ];
1122                                                         MapTriangle( lm, info, dv, mapNonAxial );
1123
1124                                                         /* get drawverts and map second triangle */
1125                                                         dv[ 0 ] = &verts[ pw[ r + 0 ] ];
1126                                                         dv[ 1 ] = &verts[ pw[ r + 2 ] ];
1127                                                         dv[ 2 ] = &verts[ pw[ r + 3 ] ];
1128                                                         MapTriangle( lm, info, dv, mapNonAxial );
1129                                                 }
1130                                         }
1131                                 }
1132
1133                                 #else
1134
1135                                 for( y = 0; y < (mesh->height - 1); y++ )
1136                                 {
1137                                         for( x = 0; x < (mesh->width - 1); x++ )
1138                                         {
1139                                                 /* set indexes */
1140                                                 pw[ 0 ] = x + (y * mesh->width);
1141                                                 pw[ 1 ] = x + ((y + 1) * mesh->width);
1142                                                 pw[ 2 ] = x + 1 + ((y + 1) * mesh->width);
1143                                                 pw[ 3 ] = x + 1 + (y * mesh->width);
1144                                                 pw[ 4 ] = pw[ 0 ];
1145
1146                                                 /* set radix */
1147                                                 r = (x + y) & 1;
1148
1149                                                 /* attempt to map quad first */
1150                                                 dv[ 0 ] = &verts[ pw[ r + 0 ] ];
1151                                                 dv[ 1 ] = &verts[ pw[ r + 1 ] ];
1152                                                 dv[ 2 ] = &verts[ pw[ r + 2 ] ];
1153                                                 dv[ 3 ] = &verts[ pw[ r + 3 ] ];
1154                                                 if( MapQuad( lm, info, dv ) )
1155                                                         continue;
1156
1157                                                 /* get drawverts and map first triangle */
1158                                                 MapTriangle( lm, info, dv, mapNonAxial );
1159
1160                                                 /* get drawverts and map second triangle */
1161                                                 dv[ 1 ] = &verts[ pw[ r + 2 ] ];
1162                                                 dv[ 2 ] = &verts[ pw[ r + 3 ] ];
1163                                                 MapTriangle( lm, info, dv, mapNonAxial );
1164                                         }
1165                                 }
1166
1167                                 #endif
1168
1169                                 /* free the mesh */
1170                                 FreeMesh( mesh );
1171                                 break;
1172
1173                         default:
1174                                 break;
1175                 }
1176         }
1177
1178         /* -----------------------------------------------------------------
1179            average and clean up luxel normals
1180            ----------------------------------------------------------------- */
1181
1182         /* walk the luxels */
1183         for( y = 0; y < lm->sh; y++ )
1184         {
1185                 for( x = 0; x < lm->sw; x++ )
1186                 {
1187                         /* get luxel */
1188                         luxel = SUPER_LUXEL( 0, x, y );
1189                         normal = SUPER_NORMAL( x, y );
1190                         cluster = SUPER_CLUSTER( x, y );
1191
1192                         /* only look at mapped luxels */
1193                         if( *cluster < 0 )
1194                                 continue;
1195
1196                         /* the normal data could be the sum of multiple samples */
1197                         if( luxel[ 3 ] > 1.0f )
1198                                 VectorNormalize( normal, normal );
1199
1200                         /* mark this luxel as having only one normal */
1201                         luxel[ 3 ] = 1.0f;
1202                 }
1203         }
1204
1205         /* non-planar surfaces stop here */
1206         if( lm->plane == NULL )
1207                 return;
1208
1209         /* -----------------------------------------------------------------
1210            map occluded or unuxed luxels
1211            ----------------------------------------------------------------- */
1212
1213         /* walk the luxels */
1214         radius = floor( superSample / 2 );
1215         radius = radius > 0 ? radius : 1.0f;
1216         radius += 1.0f;
1217         for( pass = 2.0f; pass <= radius; pass += 1.0f )
1218         {
1219                 for( y = 0; y < lm->sh; y++ )
1220                 {
1221                         for( x = 0; x < lm->sw; x++ )
1222                         {
1223                                 /* get luxel */
1224                                 luxel = SUPER_LUXEL( 0, x, y );
1225                                 normal = SUPER_NORMAL( x, y );
1226                                 cluster = SUPER_CLUSTER( x, y );
1227
1228                                 /* only look at unmapped luxels */
1229                                 if( *cluster != CLUSTER_UNMAPPED )
1230                                         continue;
1231
1232                                 /* divine a normal and origin from neighboring luxels */
1233                                 VectorClear( fake.xyz );
1234                                 VectorClear( fake.normal );
1235                                 fake.lightmap[ 0 ][ 0 ] = x;    //% 0.0001 + x;
1236                                 fake.lightmap[ 0 ][ 1 ] = y;    //% 0.0001 + y;
1237                                 samples = 0.0f;
1238                                 for( sy = (y - 1); sy <= (y + 1); sy++ )
1239                                 {
1240                                         if( sy < 0 || sy >= lm->sh )
1241                                                 continue;
1242
1243                                         for( sx = (x - 1); sx <= (x + 1); sx++ )
1244                                         {
1245                                                 if( sx < 0 || sx >= lm->sw || (sx == x && sy == y) )
1246                                                         continue;
1247
1248                                                 /* get neighboring luxel */
1249                                                 luxel = SUPER_LUXEL( 0, sx, sy );
1250                                                 origin = SUPER_ORIGIN( sx, sy );
1251                                                 normal = SUPER_NORMAL( sx, sy );
1252                                                 cluster = SUPER_CLUSTER( sx, sy );
1253
1254                                                 /* only consider luxels mapped in previous passes */
1255                                                 if( *cluster < 0 || luxel[ 0 ] >= pass )
1256                                                         continue;
1257
1258                                                 /* add its distinctiveness to our own */
1259                                                 VectorAdd( fake.xyz, origin, fake.xyz );
1260                                                 VectorAdd( fake.normal, normal, fake.normal );
1261                                                 samples += luxel[ 3 ];
1262                                         }
1263                                 }
1264
1265                                 /* any samples? */
1266                                 if( samples == 0.0f )
1267                                         continue;
1268
1269                                 /* average */
1270                                 VectorDivide( fake.xyz, samples, fake.xyz );
1271                                 //%     VectorDivide( fake.normal, samples, fake.normal );
1272                                 if( VectorNormalize( fake.normal, fake.normal ) == 0.0f )
1273                                         continue;
1274
1275                                 /* map the fake vert */
1276                                 MapSingleLuxel( lm, NULL, &fake, lm->plane, pass, NULL, NULL, NULL );
1277                         }
1278                 }
1279         }
1280
1281         /* -----------------------------------------------------------------
1282            average and clean up luxel normals
1283            ----------------------------------------------------------------- */
1284
1285         /* walk the luxels */
1286         for( y = 0; y < lm->sh; y++ )
1287         {
1288                 for( x = 0; x < lm->sw; x++ )
1289                 {
1290                         /* get luxel */
1291                         luxel = SUPER_LUXEL( 0, x, y );
1292                         normal = SUPER_NORMAL( x, y );
1293                         cluster = SUPER_CLUSTER( x, y );
1294
1295                         /* only look at mapped luxels */
1296                         if( *cluster < 0 )
1297                                 continue;
1298
1299                         /* the normal data could be the sum of multiple samples */
1300                         if( luxel[ 3 ] > 1.0f )
1301                                 VectorNormalize( normal, normal );
1302
1303                         /* mark this luxel as having only one normal */
1304                         luxel[ 3 ] = 1.0f;
1305                 }
1306         }
1307
1308         /* debug code */
1309         #if 0
1310                 Sys_Printf( "\n" );
1311                 for( y = 0; y < lm->sh; y++ )
1312                 {
1313                         for( x = 0; x < lm->sw; x++ )
1314                         {
1315                                 vec3_t  mins, maxs;
1316
1317
1318                                 cluster = SUPER_CLUSTER( x, y );
1319                                 origin = SUPER_ORIGIN( x, y );
1320                                 normal = SUPER_NORMAL( x, y );
1321                                 luxel = SUPER_LUXEL( x, y );
1322
1323                                 if( *cluster < 0 )
1324                                         continue;
1325
1326                                 /* check if within the bounding boxes of all surfaces referenced */
1327                                 ClearBounds( mins, maxs );
1328                                 for( n = 0; n < lm->numLightSurfaces; n++ )
1329                                 {
1330                                         int TOL;
1331                                         info = &surfaceInfos[ lightSurfaces[ lm->firstLightSurface + n ] ];
1332                                         TOL = info->sampleSize + 2;
1333                                         AddPointToBounds( info->mins, mins, maxs );
1334                                         AddPointToBounds( info->maxs, mins, maxs );
1335                                         if( origin[ 0 ] > (info->mins[ 0 ] - TOL) && origin[ 0 ] < (info->maxs[ 0 ] + TOL) &&
1336                                                 origin[ 1 ] > (info->mins[ 1 ] - TOL) && origin[ 1 ] < (info->maxs[ 1 ] + TOL) &&
1337                                                 origin[ 2 ] > (info->mins[ 2 ] - TOL) && origin[ 2 ] < (info->maxs[ 2 ] + TOL) )
1338                                                 break;
1339                                 }
1340
1341                                 /* inside? */
1342                                 if( n < lm->numLightSurfaces )
1343                                         continue;
1344
1345                                 /* report bogus origin */
1346                                 Sys_Printf( "%6d [%2d,%2d] (%4d): XYZ(%+4.1f %+4.1f %+4.1f) LO(%+4.1f %+4.1f %+4.1f) HI(%+4.1f %+4.1f %+4.1f) <%3.0f>\n",
1347                                         rawLightmapNum, x, y, *cluster,
1348                                         origin[ 0 ], origin[ 1 ], origin[ 2 ],
1349                                         mins[ 0 ], mins[ 1 ], mins[ 2 ],
1350                                         maxs[ 0 ], maxs[ 1 ], maxs[ 2 ],
1351                                         luxel[ 3 ] );
1352                         }
1353                 }
1354         #endif
1355 }
1356
1357
1358
1359 /*
1360 SetupDirt()
1361 sets up dirtmap (ambient occlusion)
1362 */
1363
1364 #define DIRT_CONE_ANGLE                         88      /* degrees */
1365 #define DIRT_NUM_ANGLE_STEPS            16
1366 #define DIRT_NUM_ELEVATION_STEPS        3
1367 #define DIRT_NUM_VECTORS                        (DIRT_NUM_ANGLE_STEPS * DIRT_NUM_ELEVATION_STEPS)
1368
1369 static vec3_t           dirtVectors[ DIRT_NUM_VECTORS ];
1370 static int                      numDirtVectors = 0;
1371
1372 void SetupDirt( void )
1373 {
1374         int             i, j;
1375         float   angle, elevation, angleStep, elevationStep;
1376
1377
1378         /* note it */
1379         Sys_FPrintf( SYS_VRB, "--- SetupDirt ---\n" );
1380
1381         /* calculate angular steps */
1382         angleStep = DEG2RAD( 360.0f / DIRT_NUM_ANGLE_STEPS );
1383         elevationStep = DEG2RAD( DIRT_CONE_ANGLE / DIRT_NUM_ELEVATION_STEPS );
1384
1385         /* iterate angle */
1386         angle = 0.0f;
1387         for( i = 0, angle = 0.0f; i < DIRT_NUM_ANGLE_STEPS; i++, angle += angleStep )
1388         {
1389                 /* iterate elevation */
1390                 for( j = 0, elevation = elevationStep * 0.5f; j < DIRT_NUM_ELEVATION_STEPS; j++, elevation += elevationStep )
1391                 {
1392                         dirtVectors[ numDirtVectors ][ 0 ] = sin( elevation ) * cos( angle );
1393                         dirtVectors[ numDirtVectors ][ 1 ] = sin( elevation ) * sin( angle );
1394                         dirtVectors[ numDirtVectors ][ 2 ] = cos( elevation );
1395                         numDirtVectors++;
1396                 }
1397         }
1398
1399         /* emit some statistics */
1400         Sys_FPrintf( SYS_VRB, "%9d dirtmap vectors\n", numDirtVectors );
1401 }
1402
1403
1404 /*
1405 DirtForSample()
1406 calculates dirt value for a given sample
1407 */
1408
1409 float DirtForSample( trace_t *trace )
1410 {
1411         int             i;
1412         float   gatherDirt, outDirt, angle, elevation, ooDepth;
1413         vec3_t  normal, worldUp, myUp, myRt, temp, direction, displacement;
1414
1415
1416         /* dummy check */
1417         if( !dirty )
1418                 return 1.0f;
1419         if( trace == NULL || trace->cluster < 0 )
1420                 return 0.0f;
1421
1422         /* setup */
1423         gatherDirt = 0.0f;
1424         ooDepth = 1.0f / dirtDepth;
1425         VectorCopy( trace->normal, normal );
1426
1427         /* check if the normal is aligned to the world-up */
1428         if( normal[ 0 ] == 0.0f && normal[ 1 ] == 0.0f )
1429         {
1430                 if( normal[ 2 ] == 1.0f )
1431                 {
1432                         VectorSet( myRt, 1.0f, 0.0f, 0.0f );
1433                         VectorSet( myUp, 0.0f, 1.0f, 0.0f );
1434                 }
1435                 else if( normal[ 2 ] == -1.0f )
1436                 {
1437                         VectorSet( myRt, -1.0f, 0.0f, 0.0f );
1438                         VectorSet( myUp,  0.0f, 1.0f, 0.0f );
1439                 }
1440         }
1441         else
1442         {
1443                 VectorSet( worldUp, 0.0f, 0.0f, 1.0f );
1444                 CrossProduct( normal, worldUp, myRt );
1445                 VectorNormalize( myRt, myRt );
1446                 CrossProduct( myRt, normal, myUp );
1447                 VectorNormalize( myUp, myUp );
1448         }
1449
1450         /* 1 = random mode, 0 (well everything else) = non-random mode */
1451         if( dirtMode == 1 )
1452         {
1453                 /* iterate */
1454                 for( i = 0; i < numDirtVectors; i++ )
1455                 {
1456                         /* get random vector */
1457                         angle = Random() * DEG2RAD( 360.0f );
1458                         elevation = Random() * DEG2RAD( DIRT_CONE_ANGLE );
1459                         temp[ 0 ] = cos( angle ) * sin( elevation );
1460                         temp[ 1 ] = sin( angle ) * sin( elevation );
1461                         temp[ 2 ] = cos( elevation );
1462
1463                         /* transform into tangent space */
1464                         direction[ 0 ] = myRt[ 0 ] * temp[ 0 ] + myUp[ 0 ] * temp[ 1 ] + normal[ 0 ] * temp[ 2 ];
1465                         direction[ 1 ] = myRt[ 1 ] * temp[ 0 ] + myUp[ 1 ] * temp[ 1 ] + normal[ 1 ] * temp[ 2 ];
1466                         direction[ 2 ] = myRt[ 2 ] * temp[ 0 ] + myUp[ 2 ] * temp[ 1 ] + normal[ 2 ] * temp[ 2 ];
1467
1468                         /* set endpoint */
1469                         VectorMA( trace->origin, dirtDepth, direction, trace->end );
1470                         SetupTrace( trace );
1471
1472                         /* trace */
1473                         TraceLine( trace );
1474                         if( trace->opaque )
1475                         {
1476                                 VectorSubtract( trace->hit, trace->origin, displacement );
1477                                 gatherDirt += 1.0f - ooDepth * VectorLength( displacement );
1478                         }
1479                 }
1480         }
1481         else
1482         {
1483                 /* iterate through ordered vectors */
1484                 for( i = 0; i < numDirtVectors; i++ )
1485                 {
1486                         /* transform vector into tangent space */
1487                         direction[ 0 ] = myRt[ 0 ] * dirtVectors[ i ][ 0 ] + myUp[ 0 ] * dirtVectors[ i ][ 1 ] + normal[ 0 ] * dirtVectors[ i ][ 2 ];
1488                         direction[ 1 ] = myRt[ 1 ] * dirtVectors[ i ][ 0 ] + myUp[ 1 ] * dirtVectors[ i ][ 1 ] + normal[ 1 ] * dirtVectors[ i ][ 2 ];
1489                         direction[ 2 ] = myRt[ 2 ] * dirtVectors[ i ][ 0 ] + myUp[ 2 ] * dirtVectors[ i ][ 1 ] + normal[ 2 ] * dirtVectors[ i ][ 2 ];
1490
1491                         /* set endpoint */
1492                         VectorMA( trace->origin, dirtDepth, direction, trace->end );
1493                         SetupTrace( trace );
1494
1495                         /* trace */
1496                         TraceLine( trace );
1497                         if( trace->opaque )
1498                         {
1499                                 VectorSubtract( trace->hit, trace->origin, displacement );
1500                                 gatherDirt += 1.0f - ooDepth * VectorLength( displacement );
1501                         }
1502                 }
1503         }
1504
1505         /* direct ray */
1506         VectorMA( trace->origin, dirtDepth, normal, trace->end );
1507         SetupTrace( trace );
1508
1509         /* trace */
1510         TraceLine( trace );
1511         if( trace->opaque )
1512         {
1513                 VectorSubtract( trace->hit, trace->origin, displacement );
1514                 gatherDirt += 1.0f - ooDepth * VectorLength( displacement );
1515         }
1516
1517         /* early out */
1518         if( gatherDirt <= 0.0f )
1519                 return 1.0f;
1520
1521         /* apply gain (does this even do much? heh) */
1522         outDirt = pow( gatherDirt / (numDirtVectors + 1), dirtGain );
1523         if( outDirt > 1.0f )
1524                 outDirt = 1.0f;
1525
1526         /* apply scale */
1527         outDirt *= dirtScale;
1528         if( outDirt > 1.0f )
1529                 outDirt = 1.0f;
1530
1531         /* return to sender */
1532         return 1.0f - outDirt;
1533 }
1534
1535
1536
1537 /*
1538 DirtyRawLightmap()
1539 calculates dirty fraction for each luxel
1540 */
1541
1542 void DirtyRawLightmap( int rawLightmapNum )
1543 {
1544         int                                     i, x, y, sx, sy, *cluster;
1545         float                           *origin, *normal, *dirt, *dirt2, average, samples;
1546         rawLightmap_t           *lm;
1547         surfaceInfo_t           *info;
1548         trace_t                         trace;
1549
1550
1551         /* bail if this number exceeds the number of raw lightmaps */
1552         if( rawLightmapNum >= numRawLightmaps )
1553                 return;
1554
1555         /* get lightmap */
1556         lm = &rawLightmaps[ rawLightmapNum ];
1557
1558         /* setup trace */
1559         trace.testOcclusion = qtrue;
1560         trace.forceSunlight = qfalse;
1561         trace.recvShadows = lm->recvShadows;
1562         trace.numSurfaces = lm->numLightSurfaces;
1563         trace.surfaces = &lightSurfaces[ lm->firstLightSurface ];
1564         trace.inhibitRadius = DEFAULT_INHIBIT_RADIUS;
1565         trace.testAll = qfalse;
1566
1567         /* twosided lighting (may or may not be a good idea for lightmapped stuff) */
1568         trace.twoSided = qfalse;
1569         for( i = 0; i < trace.numSurfaces; i++ )
1570         {
1571                 /* get surface */
1572                 info = &surfaceInfos[ trace.surfaces[ i ] ];
1573
1574                 /* check twosidedness */
1575                 if( info->si->twoSided )
1576                 {
1577                         trace.twoSided = qtrue;
1578                         break;
1579                 }
1580         }
1581
1582         /* gather dirt */
1583         for( y = 0; y < lm->sh; y++ )
1584         {
1585                 for( x = 0; x < lm->sw; x++ )
1586                 {
1587                         /* get luxel */
1588                         cluster = SUPER_CLUSTER( x, y );
1589                         origin = SUPER_ORIGIN( x, y );
1590                         normal = SUPER_NORMAL( x, y );
1591                         dirt = SUPER_DIRT( x, y );
1592
1593                         /* set default dirt */
1594                         *dirt = 0.0f;
1595
1596                         /* only look at mapped luxels */
1597                         if( *cluster < 0 )
1598                                 continue;
1599
1600                         /* copy to trace */
1601                         trace.cluster = *cluster;
1602                         VectorCopy( origin, trace.origin );
1603                         VectorCopy( normal, trace.normal );
1604
1605                         /* get dirt */
1606                         *dirt = DirtForSample( &trace );
1607                 }
1608         }
1609
1610         /* testing no filtering */
1611         //%     return;
1612
1613         /* filter dirt */
1614         for( y = 0; y < lm->sh; y++ )
1615         {
1616                 for( x = 0; x < lm->sw; x++ )
1617                 {
1618                         /* get luxel */
1619                         cluster = SUPER_CLUSTER( x, y );
1620                         dirt = SUPER_DIRT( x, y );
1621
1622                         /* filter dirt by adjacency to unmapped luxels */
1623                         average = *dirt;
1624                         samples = 1.0f;
1625                         for( sy = (y - 1); sy <= (y + 1); sy++ )
1626                         {
1627                                 if( sy < 0 || sy >= lm->sh )
1628                                         continue;
1629
1630                                 for( sx = (x - 1); sx <= (x + 1); sx++ )
1631                                 {
1632                                         if( sx < 0 || sx >= lm->sw || (sx == x && sy == y) )
1633                                                 continue;
1634
1635                                         /* get neighboring luxel */
1636                                         cluster = SUPER_CLUSTER( sx, sy );
1637                                         dirt2 = SUPER_DIRT( sx, sy );
1638                                         if( *cluster < 0 || *dirt2 <= 0.0f )
1639                                                 continue;
1640
1641                                         /* add it */
1642                                         average += *dirt2;
1643                                         samples += 1.0f;
1644                                 }
1645
1646                                 /* bail */
1647                                 if( samples <= 0.0f )
1648                                         break;
1649                         }
1650
1651                         /* bail */
1652                         if( samples <= 0.0f )
1653                                 continue;
1654
1655                         /* scale dirt */
1656                         *dirt = average / samples;
1657                 }
1658         }
1659 }
1660
1661
1662
1663 /*
1664 SubmapRawLuxel()
1665 calculates the pvs cluster, origin, normal of a sub-luxel
1666 */
1667
1668 static qboolean SubmapRawLuxel( rawLightmap_t *lm, int x, int y, float bx, float by, int *sampleCluster, vec3_t sampleOrigin, vec3_t sampleNormal )
1669 {
1670         int                     i, *cluster, *cluster2;
1671         float           *origin, *origin2, *normal;     //%     , *normal2;
1672         vec3_t          originVecs[ 2 ];                        //%     , normalVecs[ 2 ];
1673
1674
1675         /* calulate x vector */
1676         if( (x < (lm->sw - 1) && bx >= 0.0f) || (x == 0 && bx <= 0.0f) )
1677         {
1678                 cluster = SUPER_CLUSTER( x, y );
1679                 origin = SUPER_ORIGIN( x, y );
1680                 //%     normal = SUPER_NORMAL( x, y );
1681                 cluster2 = SUPER_CLUSTER( x + 1, y );
1682                 origin2 = *cluster2 < 0 ? SUPER_ORIGIN( x, y ) : SUPER_ORIGIN( x + 1, y );
1683                 //%     normal2 = *cluster2 < 0 ? SUPER_NORMAL( x, y ) : SUPER_NORMAL( x + 1, y );
1684         }
1685         else if( (x > 0 && bx <= 0.0f) || (x == (lm->sw - 1) && bx >= 0.0f) )
1686         {
1687                 cluster = SUPER_CLUSTER( x - 1, y );
1688                 origin = *cluster < 0 ? SUPER_ORIGIN( x, y ) : SUPER_ORIGIN( x - 1, y );
1689                 //%     normal = *cluster < 0 ? SUPER_NORMAL( x, y ) : SUPER_NORMAL( x - 1, y );
1690                 cluster2 = SUPER_CLUSTER( x, y );
1691                 origin2 = SUPER_ORIGIN( x, y );
1692                 //%     normal2 = SUPER_NORMAL( x, y );
1693         }
1694         else
1695                 Sys_Printf( "WARNING: Spurious lightmap S vector\n" );
1696
1697         VectorSubtract( origin2, origin, originVecs[ 0 ] );
1698         //%     VectorSubtract( normal2, normal, normalVecs[ 0 ] );
1699
1700         /* calulate y vector */
1701         if( (y < (lm->sh - 1) && bx >= 0.0f) || (y == 0 && bx <= 0.0f) )
1702         {
1703                 cluster = SUPER_CLUSTER( x, y );
1704                 origin = SUPER_ORIGIN( x, y );
1705                 //%     normal = SUPER_NORMAL( x, y );
1706                 cluster2 = SUPER_CLUSTER( x, y + 1 );
1707                 origin2 = *cluster2 < 0 ? SUPER_ORIGIN( x, y ) : SUPER_ORIGIN( x, y + 1 );
1708                 //%     normal2 = *cluster2 < 0 ? SUPER_NORMAL( x, y ) : SUPER_NORMAL( x, y + 1 );
1709         }
1710         else if( (y > 0 && bx <= 0.0f) || (y == (lm->sh - 1) && bx >= 0.0f) )
1711         {
1712                 cluster = SUPER_CLUSTER( x, y - 1 );
1713                 origin = *cluster < 0 ? SUPER_ORIGIN( x, y ) : SUPER_ORIGIN( x, y - 1 );
1714                 //%     normal = *cluster < 0 ? SUPER_NORMAL( x, y ) : SUPER_NORMAL( x, y - 1 );
1715                 cluster2 = SUPER_CLUSTER( x, y );
1716                 origin2 = SUPER_ORIGIN( x, y );
1717                 //%     normal2 = SUPER_NORMAL( x, y );
1718         }
1719         else
1720                 Sys_Printf( "WARNING: Spurious lightmap T vector\n" );
1721
1722         VectorSubtract( origin2, origin, originVecs[ 1 ] );
1723         //%     VectorSubtract( normal2, normal, normalVecs[ 1 ] );
1724
1725         /* calculate new origin */
1726         //%     VectorMA( origin, bx, originVecs[ 0 ], sampleOrigin );
1727         //%     VectorMA( sampleOrigin, by, originVecs[ 1 ], sampleOrigin );
1728         for( i = 0; i < 3; i++ )
1729                 sampleOrigin[ i ] = sampleOrigin[ i ] + (bx * originVecs[ 0 ][ i ]) + (by * originVecs[ 1 ][ i ]);
1730
1731         /* get cluster */
1732         *sampleCluster = ClusterForPointExtFilter( sampleOrigin, (LUXEL_EPSILON * 2), lm->numLightClusters, lm->lightClusters );
1733         if( *sampleCluster < 0 )
1734                 return qfalse;
1735
1736         /* calculate new normal */
1737         //%     VectorMA( normal, bx, normalVecs[ 0 ], sampleNormal );
1738         //%     VectorMA( sampleNormal, by, normalVecs[ 1 ], sampleNormal );
1739         //%     if( VectorNormalize( sampleNormal, sampleNormal ) <= 0.0f )
1740         //%             return qfalse;
1741         normal = SUPER_NORMAL( x, y );
1742         VectorCopy( normal, sampleNormal );
1743
1744         /* return ok */
1745         return qtrue;
1746 }
1747
1748
1749 /*
1750 SubsampleRawLuxel_r()
1751 recursively subsamples a luxel until its color gradient is low enough or subsampling limit is reached
1752 */
1753
1754 static void SubsampleRawLuxel_r( rawLightmap_t *lm, trace_t *trace, vec3_t sampleOrigin, int x, int y, float bias, float *lightLuxel )
1755 {
1756         int                     b, samples, mapped, lighted;
1757         int                     cluster[ 4 ];
1758         vec4_t          luxel[ 4 ];
1759         vec3_t          origin[ 4 ], normal[ 4 ];
1760         float           biasDirs[ 4 ][ 2 ] = { { -1.0f, -1.0f }, { 1.0f, -1.0f }, { -1.0f, 1.0f }, { 1.0f, 1.0f } };
1761         vec3_t          color, total;
1762
1763
1764         /* limit check */
1765         if( lightLuxel[ 3 ] >= lightSamples )
1766                 return;
1767
1768         /* setup */
1769         VectorClear( total );
1770         mapped = 0;
1771         lighted = 0;
1772
1773         /* make 2x2 subsample stamp */
1774         for( b = 0; b < 4; b++ )
1775         {
1776                 /* set origin */
1777                 VectorCopy( sampleOrigin, origin[ b ] );
1778
1779                 /* calculate position */
1780                 if( !SubmapRawLuxel( lm, x, y, (bias * biasDirs[ b ][ 0 ]), (bias * biasDirs[ b ][ 1 ]), &cluster[ b ], origin[ b ], normal[ b ] ) )
1781                 {
1782                         cluster[ b ] = -1;
1783                         continue;
1784                 }
1785                 mapped++;
1786
1787                 /* increment sample count */
1788                 luxel[ b ][ 3 ] = lightLuxel[ 3 ] + 1.0f;
1789
1790                 /* setup trace */
1791                 trace->cluster = *cluster;
1792                 VectorCopy( origin[ b ], trace->origin );
1793                 VectorCopy( normal[ b ], trace->normal );
1794
1795                 /* sample light */
1796
1797                 LightContributionToSample( trace );
1798
1799                 /* add to totals (fixme: make contrast function) */
1800                 VectorCopy( trace->color, luxel[ b ] );
1801                 VectorAdd( total, trace->color, total );
1802                 if( (luxel[ b ][ 0 ] + luxel[ b ][ 1 ] + luxel[ b ][ 2 ]) > 0.0f )
1803                         lighted++;
1804         }
1805
1806         /* subsample further? */
1807         if( (lightLuxel[ 3 ] + 1.0f) < lightSamples &&
1808                 (total[ 0 ] > 4.0f || total[ 1 ] > 4.0f || total[ 2 ] > 4.0f) &&
1809                 lighted != 0 && lighted != mapped )
1810         {
1811                 for( b = 0; b < 4; b++ )
1812                 {
1813                         if( cluster[ b ] < 0 )
1814                                 continue;
1815                         SubsampleRawLuxel_r( lm, trace, origin[ b ], x, y, (bias * 0.25f), luxel[ b ] );
1816                 }
1817         }
1818
1819         /* average */
1820         //%     VectorClear( color );
1821         //%     samples = 0;
1822         VectorCopy( lightLuxel, color );
1823         samples = 1;
1824         for( b = 0; b < 4; b++ )
1825         {
1826                 if( cluster[ b ] < 0 )
1827                         continue;
1828                 VectorAdd( color, luxel[ b ], color );
1829                 samples++;
1830         }
1831
1832         /* add to luxel */
1833         if( samples > 0 )
1834         {
1835                 /* average */
1836                 color[ 0 ] /= samples;
1837                 color[ 1 ] /= samples;
1838                 color[ 2 ] /= samples;
1839
1840                 /* add to color */
1841                 VectorCopy( color, lightLuxel );
1842                 lightLuxel[ 3 ] += 1.0f;
1843         }
1844 }
1845
1846
1847
1848 /*
1849 IlluminateRawLightmap()
1850 illuminates the luxels
1851 */
1852
1853 #define STACK_LL_SIZE                   (SUPER_LUXEL_SIZE * 64 * 64)
1854 #define LIGHT_LUXEL( x, y )             (lightLuxels + ((((y) * lm->sw) + (x)) * SUPER_LUXEL_SIZE))
1855
1856 void IlluminateRawLightmap( int rawLightmapNum )
1857 {
1858         int                                     i, t, x, y, sx, sy, size, llSize, luxelFilterRadius, lightmapNum;
1859         int                                     *cluster, *cluster2, mapped, lighted, totalLighted;
1860         rawLightmap_t           *lm;
1861         surfaceInfo_t           *info;
1862         qboolean                        filterColor, filterDir;
1863         float                           brightness;
1864         float                           *origin, *normal, *dirt, *luxel, *luxel2, *deluxel, *deluxel2;
1865         float                           *lightLuxels, *lightLuxel, samples, filterRadius, weight;
1866         vec3_t                          color, averageColor, averageDir, total, temp, temp2;
1867         float                           tests[ 4 ][ 2 ] = { { 0.0f, 0 }, { 1, 0 }, { 0, 1 }, { 1, 1 } };
1868         trace_t                         trace;
1869         float                           stackLightLuxels[ STACK_LL_SIZE ];
1870         vec3_t                          flood;
1871         float                           *floodlight;
1872
1873
1874         /* bail if this number exceeds the number of raw lightmaps */
1875         if( rawLightmapNum >= numRawLightmaps )
1876                 return;
1877
1878         /* get lightmap */
1879         lm = &rawLightmaps[ rawLightmapNum ];
1880
1881         /* setup trace */
1882         trace.testOcclusion = !noTrace;
1883         trace.forceSunlight = qfalse;
1884         trace.recvShadows = lm->recvShadows;
1885         trace.numSurfaces = lm->numLightSurfaces;
1886         trace.surfaces = &lightSurfaces[ lm->firstLightSurface ];
1887         trace.inhibitRadius = DEFAULT_INHIBIT_RADIUS;
1888
1889         /* twosided lighting (may or may not be a good idea for lightmapped stuff) */
1890         trace.twoSided = qfalse;
1891         for( i = 0; i < trace.numSurfaces; i++ )
1892         {
1893                 /* get surface */
1894                 info = &surfaceInfos[ trace.surfaces[ i ] ];
1895
1896                 /* check twosidedness */
1897                 if( info->si->twoSided )
1898                 {
1899                         trace.twoSided = qtrue;
1900                         break;
1901                 }
1902         }
1903
1904         /* create a culled light list for this raw lightmap */
1905         CreateTraceLightsForBounds( lm->mins, lm->maxs, lm->plane, lm->numLightClusters, lm->lightClusters, LIGHT_SURFACES, &trace );
1906
1907         /* -----------------------------------------------------------------
1908            fill pass
1909            ----------------------------------------------------------------- */
1910
1911         /* set counts */
1912         numLuxelsIlluminated += (lm->sw * lm->sh);
1913
1914         /* test debugging state */
1915         if( debugSurfaces || debugAxis || debugCluster || debugOrigin || dirtDebug || normalmap )
1916         {
1917                 /* debug fill the luxels */
1918                 for( y = 0; y < lm->sh; y++ )
1919                 {
1920                         for( x = 0; x < lm->sw; x++ )
1921                         {
1922                                 /* get cluster */
1923                                 cluster = SUPER_CLUSTER( x, y );
1924
1925                                 /* only fill mapped luxels */
1926                                 if( *cluster < 0 )
1927                                         continue;
1928
1929                                 /* get particulars */
1930                                 luxel = SUPER_LUXEL( 0, x, y );
1931                                 origin = SUPER_ORIGIN( x, y );
1932                                 normal = SUPER_NORMAL( x, y );
1933
1934                                 /* color the luxel with raw lightmap num? */
1935                                 if( debugSurfaces )
1936                                         VectorCopy( debugColors[ rawLightmapNum % 12 ], luxel );
1937
1938                                 /* color the luxel with lightmap axis? */
1939                                 else if( debugAxis )
1940                                 {
1941                                         luxel[ 0 ] = (lm->axis[ 0 ] + 1.0f) * 127.5f;
1942                                         luxel[ 1 ] = (lm->axis[ 1 ] + 1.0f) * 127.5f;
1943                                         luxel[ 2 ] = (lm->axis[ 2 ] + 1.0f) * 127.5f;
1944                                 }
1945
1946                                 /* color the luxel with luxel cluster? */
1947                                 else if( debugCluster )
1948                                         VectorCopy( debugColors[ *cluster % 12 ], luxel );
1949
1950                                 /* color the luxel with luxel origin? */
1951                                 else if( debugOrigin )
1952                                 {
1953                                         VectorSubtract( lm->maxs, lm->mins, temp );
1954                                         VectorScale( temp, (1.0f / 255.0f), temp );
1955                                         VectorSubtract( origin, lm->mins, temp2 );
1956                                         luxel[ 0 ] = lm->mins[ 0 ] + (temp[ 0 ] * temp2[ 0 ]);
1957                                         luxel[ 1 ] = lm->mins[ 1 ] + (temp[ 1 ] * temp2[ 1 ]);
1958                                         luxel[ 2 ] = lm->mins[ 2 ] + (temp[ 2 ] * temp2[ 2 ]);
1959                                 }
1960
1961                                 /* color the luxel with the normal */
1962                                 else if( normalmap )
1963                                 {
1964                                         luxel[ 0 ] = (normal[ 0 ] + 1.0f) * 127.5f;
1965                                         luxel[ 1 ] = (normal[ 1 ] + 1.0f) * 127.5f;
1966                                         luxel[ 2 ] = (normal[ 2 ] + 1.0f) * 127.5f;
1967                                 }
1968
1969                                 /* otherwise clear it */
1970                                 else
1971                                         VectorClear( luxel );
1972
1973                                 /* add to counts */
1974                                 luxel[ 3 ] = 1.0f;
1975                         }
1976                 }
1977         }
1978         else
1979         {
1980                 /* allocate temporary per-light luxel storage */
1981                 llSize = lm->sw * lm->sh * SUPER_LUXEL_SIZE * sizeof( float );
1982                 if( llSize <= (STACK_LL_SIZE * sizeof( float )) )
1983                         lightLuxels = stackLightLuxels;
1984                 else
1985                         lightLuxels = safe_malloc( llSize );
1986
1987                 /* clear luxels */
1988                 //%     memset( lm->superLuxels[ 0 ], 0, llSize );
1989
1990                 /* set ambient color */
1991                 for( y = 0; y < lm->sh; y++ )
1992                 {
1993                         for( x = 0; x < lm->sw; x++ )
1994                         {
1995                                 /* get cluster */
1996                                 cluster = SUPER_CLUSTER( x, y );
1997                                 luxel = SUPER_LUXEL( 0, x, y );
1998                                 normal = SUPER_NORMAL( x, y );
1999                                 deluxel = SUPER_DELUXEL( x, y );
2000
2001                                 /* blacken unmapped clusters */
2002                                 if( *cluster < 0 )
2003                                         VectorClear( luxel );
2004
2005                                 /* set ambient */
2006                                 else
2007                                 {
2008                                         VectorCopy( ambientColor, luxel );
2009                                         if( deluxemap )
2010                                                 VectorScale( normal, 0.00390625f, deluxel );
2011                                         luxel[ 3 ] = 1.0f;
2012                                 }
2013                         }
2014                 }
2015
2016                 /* clear styled lightmaps */
2017                 size = lm->sw * lm->sh * SUPER_LUXEL_SIZE * sizeof( float );
2018                 for( lightmapNum = 1; lightmapNum < MAX_LIGHTMAPS; lightmapNum++ )
2019                 {
2020                         if( lm->superLuxels[ lightmapNum ] != NULL )
2021                                 memset( lm->superLuxels[ lightmapNum ], 0, size );
2022                 }
2023
2024                 /* debugging code */
2025                 //%     if( trace.numLights <= 0 )
2026                 //%             Sys_Printf( "Lightmap %9d: 0 lights, axis: %.2f, %.2f, %.2f\n", rawLightmapNum, lm->axis[ 0 ], lm->axis[ 1 ], lm->axis[ 2 ] );
2027
2028                 /* walk light list */
2029                 for( i = 0; i < trace.numLights; i++ )
2030                 {
2031                         /* setup trace */
2032                         trace.light = trace.lights[ i ];
2033
2034                         /* style check */
2035                         for( lightmapNum = 0; lightmapNum < MAX_LIGHTMAPS; lightmapNum++ )
2036                         {
2037                                 if( lm->styles[ lightmapNum ] == trace.light->style ||
2038                                         lm->styles[ lightmapNum ] == LS_NONE )
2039                                         break;
2040                         }
2041
2042                         /* max of MAX_LIGHTMAPS (4) styles allowed to hit a surface/lightmap */
2043                         if( lightmapNum >= MAX_LIGHTMAPS )
2044                         {
2045                                 Sys_Printf( "WARNING: Hit per-surface style limit (%d)\n", MAX_LIGHTMAPS );
2046                                 continue;
2047                         }
2048
2049                         /* setup */
2050                         memset( lightLuxels, 0, llSize );
2051                         totalLighted = 0;
2052
2053                         /* initial pass, one sample per luxel */
2054                         for( y = 0; y < lm->sh; y++ )
2055                         {
2056                                 for( x = 0; x < lm->sw; x++ )
2057                                 {
2058                                         /* get cluster */
2059                                         cluster = SUPER_CLUSTER( x, y );
2060                                         if( *cluster < 0 )
2061                                                 continue;
2062
2063                                         /* get particulars */
2064                                         lightLuxel = LIGHT_LUXEL( x, y );
2065                                         deluxel = SUPER_DELUXEL( x, y );
2066                                         origin = SUPER_ORIGIN( x, y );
2067                                         normal = SUPER_NORMAL( x, y );
2068
2069 #if 0
2070                                         ////////// 27's temp hack for testing edge clipping ////
2071                                         if( origin[0]==0 && origin[1]==0 && origin[2]==0 )
2072                                         {
2073                                                 lightLuxel[ 1 ] = 255;
2074                                                 lightLuxel[ 3 ] = 1.0f;
2075                                                 totalLighted++;
2076                                         }
2077                                         else
2078 #endif
2079                                         {
2080                                                 /* set contribution count */
2081                                                 lightLuxel[ 3 ] = 1.0f;
2082
2083                                                 /* setup trace */
2084                                                 trace.cluster = *cluster;
2085                                                 VectorCopy( origin, trace.origin );
2086                                                 VectorCopy( normal, trace.normal );
2087
2088                                                 /* get light for this sample */
2089                                                 LightContributionToSample( &trace );
2090                                                 VectorCopy( trace.color, lightLuxel );
2091
2092                                                 /* add to count */
2093                                                 if( trace.color[ 0 ] || trace.color[ 1 ] || trace.color[ 2 ] )
2094                                                         totalLighted++;
2095                                         }
2096
2097                                         /* add to light direction map (fixme: use luxel normal as starting point for deluxel?) */
2098                                         if( deluxemap )
2099                                         {
2100                                                 /* color to grayscale (photoshop rgb weighting) */
2101                                                 brightness = trace.color[ 0 ] * 0.3f + trace.color[ 1 ] * 0.59f + trace.color[ 2 ] * 0.11f;
2102                                                 brightness *= (1.0 / 255.0);
2103                                                 VectorScale( trace.direction, brightness, trace.direction );
2104                                                 VectorAdd( deluxel, trace.direction, deluxel );
2105                                         }
2106                                 }
2107                         }
2108
2109                         /* don't even bother with everything else if nothing was lit */
2110                         if( totalLighted == 0 )
2111                                 continue;
2112
2113                         /* determine filter radius */
2114                         filterRadius = lm->filterRadius > trace.light->filterRadius
2115                                 ? lm->filterRadius
2116                                 : trace.light->filterRadius;
2117                         if( filterRadius < 0.0f )
2118                                 filterRadius = 0.0f;
2119
2120                         /* set luxel filter radius */
2121                         luxelFilterRadius = superSample * filterRadius / lm->sampleSize;
2122                         if( luxelFilterRadius == 0 && (filterRadius > 0.0f || filter) )
2123                                 luxelFilterRadius = 1;
2124
2125                         /* secondary pass, adaptive supersampling (fixme: use a contrast function to determine if subsampling is necessary) */
2126                         /* 2003-09-27: changed it so filtering disamples supersampling, as it would waste time */
2127                         if( lightSamples > 1 && luxelFilterRadius == 0 )
2128                         {
2129                                 /* walk luxels */
2130                                 for( y = 0; y < (lm->sh - 1); y++ )
2131                                 {
2132                                         for( x = 0; x < (lm->sw - 1); x++ )
2133                                         {
2134                                                 /* setup */
2135                                                 mapped = 0;
2136                                                 lighted = 0;
2137                                                 VectorClear( total );
2138
2139                                                 /* test 2x2 stamp */
2140                                                 for( t = 0; t < 4; t++ )
2141                                                 {
2142                                                         /* set sample coords */
2143                                                         sx = x + tests[ t ][ 0 ];
2144                                                         sy = y + tests[ t ][ 1 ];
2145
2146                                                         /* get cluster */
2147                                                         cluster = SUPER_CLUSTER( sx, sy );
2148                                                         if( *cluster < 0 )
2149                                                                 continue;
2150                                                         mapped++;
2151
2152                                                         /* get luxel */
2153                                                         lightLuxel = LIGHT_LUXEL( sx, sy );
2154                                                         VectorAdd( total, lightLuxel, total );
2155                                                         if( (lightLuxel[ 0 ] + lightLuxel[ 1 ] + lightLuxel[ 2 ]) > 0.0f )
2156                                                                 lighted++;
2157                                                 }
2158
2159                                                 /* if total color is under a certain amount, then don't bother subsampling */
2160                                                 if( total[ 0 ] <= 4.0f && total[ 1 ] <= 4.0f && total[ 2 ] <= 4.0f )
2161                                                         continue;
2162
2163                                                 /* if all 4 pixels are either in shadow or light, then don't subsample */
2164                                                 if( lighted != 0 && lighted != mapped )
2165                                                 {
2166                                                         for( t = 0; t < 4; t++ )
2167                                                         {
2168                                                                 /* set sample coords */
2169                                                                 sx = x + tests[ t ][ 0 ];
2170                                                                 sy = y + tests[ t ][ 1 ];
2171
2172                                                                 /* get luxel */
2173                                                                 cluster = SUPER_CLUSTER( sx, sy );
2174                                                                 if( *cluster < 0 )
2175                                                                         continue;
2176                                                                 lightLuxel = LIGHT_LUXEL( sx, sy );
2177                                                                 origin = SUPER_ORIGIN( sx, sy );
2178
2179                                                                 /* only subsample shadowed luxels */
2180                                                                 //%     if( (lightLuxel[ 0 ] + lightLuxel[ 1 ] + lightLuxel[ 2 ]) <= 0.0f )
2181                                                                 //%             continue;
2182
2183                                                                 /* subsample it */
2184                                                                 SubsampleRawLuxel_r( lm, &trace, origin, sx, sy, 0.25f, lightLuxel );
2185
2186                                                                 /* debug code to colorize subsampled areas to yellow */
2187                                                                 //%     luxel = SUPER_LUXEL( lightmapNum, sx, sy );
2188                                                                 //%     VectorSet( luxel, 255, 204, 0 );
2189                                                         }
2190                                                 }
2191                                         }
2192                                 }
2193                         }
2194
2195                         /* tertiary pass, apply dirt map (ambient occlusion) */
2196                         if( 0 && dirty )
2197                         {
2198                                 /* walk luxels */
2199                                 for( y = 0; y < lm->sh; y++ )
2200                                 {
2201                                         for( x = 0; x < lm->sw; x++ )
2202                                         {
2203                                                 /* get cluster  */
2204                                                 cluster = SUPER_CLUSTER( x, y );
2205                                                 if( *cluster < 0 )
2206                                                         continue;
2207
2208                                                 /* get particulars */
2209                                                 lightLuxel = LIGHT_LUXEL( x, y );
2210                                                 dirt = SUPER_DIRT( x, y );
2211
2212                                                 /* scale light value */
2213                                                 VectorScale( lightLuxel, *dirt, lightLuxel );
2214                                         }
2215                                 }
2216                         }
2217
2218                         /* allocate sampling lightmap storage */
2219                         if( lm->superLuxels[ lightmapNum ] == NULL )
2220                         {
2221                                 /* allocate sampling lightmap storage */
2222                                 size = lm->sw * lm->sh * SUPER_LUXEL_SIZE * sizeof( float );
2223                                 lm->superLuxels[ lightmapNum ] = safe_malloc( size );
2224                                 memset( lm->superLuxels[ lightmapNum ], 0, size );
2225                         }
2226
2227                         /* set style */
2228                         if( lightmapNum > 0 )
2229                         {
2230                                 lm->styles[ lightmapNum ] = trace.light->style;
2231                                 //%     Sys_Printf( "Surface %6d has lightstyle %d\n", rawLightmapNum, trace.light->style );
2232                         }
2233
2234                         /* copy to permanent luxels */
2235                         for( y = 0; y < lm->sh; y++ )
2236                         {
2237                                 for( x = 0; x < lm->sw; x++ )
2238                                 {
2239                                         /* get cluster and origin */
2240                                         cluster = SUPER_CLUSTER( x, y );
2241                                         if( *cluster < 0 )
2242                                                 continue;
2243                                         origin = SUPER_ORIGIN( x, y );
2244
2245                                         /* filter? */
2246                                         if( luxelFilterRadius )
2247                                         {
2248                                                 /* setup */
2249                                                 VectorClear( averageColor );
2250                                                 samples = 0.0f;
2251
2252                                                 /* cheaper distance-based filtering */
2253                                                 for( sy = (y - luxelFilterRadius); sy <= (y + luxelFilterRadius); sy++ )
2254                                                 {
2255                                                         if( sy < 0 || sy >= lm->sh )
2256                                                                 continue;
2257
2258                                                         for( sx = (x - luxelFilterRadius); sx <= (x + luxelFilterRadius); sx++ )
2259                                                         {
2260                                                                 if( sx < 0 || sx >= lm->sw )
2261                                                                         continue;
2262
2263                                                                 /* get particulars */
2264                                                                 cluster = SUPER_CLUSTER( sx, sy );
2265                                                                 if( *cluster < 0 )
2266                                                                         continue;
2267                                                                 lightLuxel = LIGHT_LUXEL( sx, sy );
2268
2269                                                                 /* create weight */
2270                                                                 weight = (abs( sx - x ) == luxelFilterRadius ? 0.5f : 1.0f);
2271                                                                 weight *= (abs( sy - y ) == luxelFilterRadius ? 0.5f : 1.0f);
2272
2273                                                                 /* scale luxel by filter weight */
2274                                                                 VectorScale( lightLuxel, weight, color );
2275                                                                 VectorAdd( averageColor, color, averageColor );
2276                                                                 samples += weight;
2277                                                         }
2278                                                 }
2279
2280                                                 /* any samples? */
2281                                                 if( samples <= 0.0f     )
2282                                                         continue;
2283
2284                                                 /* scale into luxel */
2285                                                 luxel = SUPER_LUXEL( lightmapNum, x, y );
2286                                                 luxel[ 3 ] = 1.0f;
2287
2288                                                 /* handle negative light */
2289                                                 if( trace.light->flags & LIGHT_NEGATIVE )
2290                                                 {
2291                                                         luxel[ 0 ] -= averageColor[ 0 ] / samples;
2292                                                         luxel[ 1 ] -= averageColor[ 1 ] / samples;
2293                                                         luxel[ 2 ] -= averageColor[ 2 ] / samples;
2294                                                 }
2295
2296                                                 /* handle normal light */
2297                                                 else
2298                                                 {
2299                                                         luxel[ 0 ] += averageColor[ 0 ] / samples;
2300                                                         luxel[ 1 ] += averageColor[ 1 ] / samples;
2301                                                         luxel[ 2 ] += averageColor[ 2 ] / samples;
2302                                                 }
2303                                         }
2304
2305                                         /* single sample */
2306                                         else
2307                                         {
2308                                                 /* get particulars */
2309                                                 lightLuxel = LIGHT_LUXEL( x, y );
2310                                                 luxel = SUPER_LUXEL( lightmapNum, x, y );
2311
2312                                                 /* handle negative light */
2313                                                 if( trace.light->flags & LIGHT_NEGATIVE )
2314                                                         VectorScale( averageColor, -1.0f, averageColor );
2315
2316                                                 /* add color */
2317                                                 luxel[ 3 ] = 1.0f;
2318
2319                                                 /* handle negative light */
2320                                                 if( trace.light->flags & LIGHT_NEGATIVE )
2321                                                         VectorSubtract( luxel, lightLuxel, luxel );
2322
2323                                                 /* handle normal light */
2324                                                 else
2325                                                         VectorAdd( luxel, lightLuxel, luxel );
2326                                         }
2327                                 }
2328                         }
2329                 }
2330
2331                 /* free temporary luxels */
2332                 if( lightLuxels != stackLightLuxels )
2333                         free( lightLuxels );
2334         }
2335
2336         /* free light list */
2337         FreeTraceLights( &trace );
2338
2339         /*      -----------------------------------------------------------------
2340                 floodlight pass
2341                 ----------------------------------------------------------------- */
2342
2343         if( floodlighty )
2344         {
2345                 /* walk lightmaps */
2346                 for( lightmapNum = 0; lightmapNum < MAX_LIGHTMAPS; lightmapNum++ )
2347                 {
2348                         /* early out */
2349                         if( lm->superLuxels[ lightmapNum ] == NULL )
2350                                 continue;
2351
2352                         /* apply floodlight to each luxel */
2353                         for( y = 0; y < lm->sh; y++ )
2354                         {
2355                                 for( x = 0; x < lm->sw; x++ )
2356                                 {
2357                                         /* get cluster */
2358                                         cluster = SUPER_CLUSTER( x, y );
2359                                         if( *cluster < 0 )
2360                                                 continue;
2361
2362                                         /* get particulars */
2363                                         luxel = SUPER_LUXEL( lightmapNum, x, y );
2364                                         floodlight = SUPER_FLOODLIGHT( x, y );
2365
2366                                         flood[0]=floodlightRGB[0]*floodlightIntensity;
2367                                         flood[1]=floodlightRGB[1]*floodlightIntensity;
2368                                         flood[2]=floodlightRGB[2]*floodlightIntensity;
2369
2370                                         /* scale light value */
2371                                         VectorScale( flood, *floodlight, flood );
2372                                         luxel[0]+=flood[0];
2373                                         luxel[1]+=flood[1];
2374                                         luxel[2]+=flood[2];
2375
2376                                         if (luxel[3]==0) luxel[3]=1;
2377                                 }
2378                         }
2379                 }
2380         }
2381
2382         if (debugnormals)
2383         {
2384                 for( lightmapNum = 0; lightmapNum < MAX_LIGHTMAPS; lightmapNum++ )
2385                 {
2386                         /* early out */
2387                         if( lm->superLuxels[ lightmapNum ] == NULL )
2388                                 continue;
2389
2390                         for( y = 0; y < lm->sh; y++ )
2391                         {
2392                                 for( x = 0; x < lm->sw; x++ )
2393                                 {
2394                                         /* get cluster */
2395                                         cluster = SUPER_CLUSTER( x, y );
2396                                         //%     if( *cluster < 0 )
2397                                         //%             continue;
2398
2399                                         /* get particulars */
2400                                         luxel = SUPER_LUXEL( lightmapNum, x, y );
2401                                         normal = SUPER_NORMAL (  x, y );
2402
2403                                         luxel[0]=(normal[0]*127)+127;
2404                                         luxel[1]=(normal[1]*127)+127;
2405                                         luxel[2]=(normal[2]*127)+127;
2406                                 }
2407                         }
2408                 }
2409         }
2410
2411         /*      -----------------------------------------------------------------
2412                 dirt pass
2413                 ----------------------------------------------------------------- */
2414
2415         if( dirty )
2416         {
2417                 /* walk lightmaps */
2418                 for( lightmapNum = 0; lightmapNum < MAX_LIGHTMAPS; lightmapNum++ )
2419                 {
2420                         /* early out */
2421                         if( lm->superLuxels[ lightmapNum ] == NULL )
2422                                 continue;
2423
2424                         /* apply dirt to each luxel */
2425                         for( y = 0; y < lm->sh; y++ )
2426                         {
2427                                 for( x = 0; x < lm->sw; x++ )
2428                                 {
2429                                         /* get cluster */
2430                                         cluster = SUPER_CLUSTER( x, y );
2431                                         //%     if( *cluster < 0 ) // TODO why not do this check? These pixels should be zero anyway
2432                                         //%             continue;
2433
2434                                         /* get particulars */
2435                                         luxel = SUPER_LUXEL( lightmapNum, x, y );
2436                                         dirt = SUPER_DIRT( x, y );
2437
2438                                         /* apply dirt */
2439                                         VectorScale( luxel, *dirt, luxel );
2440
2441                                         /* debugging */
2442                                         if( dirtDebug )
2443                                                 VectorSet( luxel, *dirt * 255.0f, *dirt * 255.0f, *dirt * 255.0f );
2444                                 }
2445                         }
2446                 }
2447         }
2448
2449         /* -----------------------------------------------------------------
2450            filter pass
2451            ----------------------------------------------------------------- */
2452
2453         /* walk lightmaps */
2454         for( lightmapNum = 0; lightmapNum < MAX_LIGHTMAPS; lightmapNum++ )
2455         {
2456                 /* early out */
2457                 if( lm->superLuxels[ lightmapNum ] == NULL )
2458                         continue;
2459
2460                 /* average occluded luxels from neighbors */
2461                 for( y = 0; y < lm->sh; y++ )
2462                 {
2463                         for( x = 0; x < lm->sw; x++ )
2464                         {
2465                                 /* get particulars */
2466                                 cluster = SUPER_CLUSTER( x, y );
2467                                 luxel = SUPER_LUXEL( lightmapNum, x, y );
2468                                 deluxel = SUPER_DELUXEL( x, y );
2469                                 normal = SUPER_NORMAL( x, y );
2470
2471                                 /* determine if filtering is necessary */
2472                                 filterColor = qfalse;
2473                                 filterDir = qfalse;
2474                                 if( *cluster < 0 ||
2475                                         (lm->splotchFix && (luxel[ 0 ] <= ambientColor[ 0 ] || luxel[ 1 ] <= ambientColor[ 1 ] || luxel[ 2 ] <= ambientColor[ 2 ])) )
2476                                         filterColor = qtrue;
2477                                 if( deluxemap && lightmapNum == 0 && (*cluster < 0 || filter) )
2478                                         filterDir = qtrue;
2479
2480                                 if( !filterColor && !filterDir )
2481                                         continue;
2482
2483                                 /* choose seed amount */
2484                                 VectorClear( averageColor );
2485                                 VectorClear( averageDir );
2486                                 samples = 0.0f;
2487
2488                                 /* walk 3x3 matrix */
2489                                 for( sy = (y - 1); sy <= (y + 1); sy++ )
2490                                 {
2491                                         if( sy < 0 || sy >= lm->sh )
2492                                                 continue;
2493
2494                                         for( sx = (x - 1); sx <= (x + 1); sx++ )
2495                                         {
2496                                                 if( sx < 0 || sx >= lm->sw || (sx == x && sy == y) )
2497                                                         continue;
2498
2499                                                 /* get neighbor's particulars */
2500                                                 cluster2 = SUPER_CLUSTER( sx, sy );
2501                                                 luxel2 = SUPER_LUXEL( lightmapNum, sx, sy );
2502                                                 deluxel2 = SUPER_DELUXEL( sx, sy );
2503
2504                                                 /* ignore unmapped/unlit luxels */
2505                                                 if( *cluster2 < 0 || luxel2[ 3 ] == 0.0f ||
2506                                                         (lm->splotchFix && VectorCompare( luxel2, ambientColor )) )
2507                                                         continue;
2508
2509                                                 /* add its distinctiveness to our own */
2510                                                 VectorAdd( averageColor, luxel2, averageColor );
2511                                                 samples += luxel2[ 3 ];
2512                                                 if( filterDir )
2513                                                         VectorAdd( averageDir, deluxel2, averageDir );
2514                                         }
2515                                 }
2516
2517                                 /* fall through */
2518                                 if( samples <= 0.0f )
2519                                         continue;
2520
2521                                 /* dark lightmap seams */
2522                                 if( dark )
2523                                 {
2524                                         if( lightmapNum == 0 )
2525                                                 VectorMA( averageColor, 2.0f, ambientColor, averageColor );
2526                                         samples += 2.0f;
2527                                 }
2528
2529                                 /* average it */
2530                                 if( filterColor )
2531                                 {
2532                                         VectorDivide( averageColor, samples, luxel );
2533                                         luxel[ 3 ] = 1.0f;
2534                                 }
2535                                 if( filterDir )
2536                                         VectorDivide( averageDir, samples, deluxel );
2537
2538                                 /* set cluster to -3 */
2539                                 if( *cluster < 0 )
2540                                         *cluster = CLUSTER_FLOODED;
2541                         }
2542                 }
2543         }
2544
2545
2546 #if 0
2547         // audit pass
2548         for( lightmapNum = 0; lightmapNum < MAX_LIGHTMAPS; lightmapNum++ )
2549         {
2550                 /* early out */
2551                 if( lm->superLuxels[ lightmapNum ] == NULL )
2552                         continue;
2553                 for( y = 0; y < lm->sh; y++ )
2554                         for( x = 0; x < lm->sw; x++ )
2555                         {
2556                                 /* get cluster */
2557                                 cluster = SUPER_CLUSTER( x, y );
2558                                 luxel = SUPER_LUXEL( lightmapNum, x, y );
2559                                 deluxel = SUPER_DELUXEL( x, y );
2560                                 if(!luxel || !deluxel || !cluster)
2561                                 {
2562                                         Sys_FPrintf(SYS_VRB, "WARNING: I got NULL'd.\n");
2563                                         continue;
2564                                 }
2565                                 else if(*cluster < 0)
2566                                 {
2567                                         // unmapped pixel
2568                                         // should have neither deluxemap nor lightmap
2569                                         if(deluxel[3])
2570                                                 Sys_FPrintf(SYS_VRB, "WARNING: I have written deluxe to an unmapped luxel. Sorry.\n");
2571                                 }
2572                                 else
2573                                 {
2574                                         // mapped pixel
2575                                         // should have both deluxemap and lightmap
2576                                         if(deluxel[3])
2577                                                 Sys_FPrintf(SYS_VRB, "WARNING: I forgot to write deluxe to a mapped luxel. Sorry.\n");
2578                                 }
2579                         }
2580         }
2581 #endif
2582 }
2583
2584
2585
2586 /*
2587 IlluminateVertexes()
2588 light the surface vertexes
2589 */
2590
2591 #define VERTEX_NUDGE    4.0f
2592
2593 void IlluminateVertexes( int num )
2594 {
2595         int                                     i, x, y, z, x1, y1, z1, sx, sy, radius, maxRadius, *cluster;
2596         int                                     lightmapNum, numAvg;
2597         float                           samples, *vertLuxel, *radVertLuxel, *luxel, dirt;
2598         vec3_t                          origin, temp, temp2, colors[ MAX_LIGHTMAPS ], avgColors[ MAX_LIGHTMAPS ];
2599         bspDrawSurface_t        *ds;
2600         surfaceInfo_t           *info;
2601         rawLightmap_t           *lm;
2602         bspDrawVert_t           *verts;
2603         trace_t                         trace;
2604
2605
2606         /* get surface, info, and raw lightmap */
2607         ds = &bspDrawSurfaces[ num ];
2608         info = &surfaceInfos[ num ];
2609         lm = info->lm;
2610
2611         /* -----------------------------------------------------------------
2612            illuminate the vertexes
2613            ----------------------------------------------------------------- */
2614
2615         /* calculate vertex lighting for surfaces without lightmaps */
2616         if( lm == NULL || cpmaHack )
2617         {
2618                 /* setup trace */
2619                 trace.testOcclusion = (cpmaHack && lm != NULL) ? qfalse : !noTrace;
2620                 trace.forceSunlight = info->si->forceSunlight;
2621                 trace.recvShadows = info->recvShadows;
2622                 trace.numSurfaces = 1;
2623                 trace.surfaces = &num;
2624                 trace.inhibitRadius = DEFAULT_INHIBIT_RADIUS;
2625
2626                 /* twosided lighting */
2627                 trace.twoSided = info->si->twoSided;
2628
2629                 /* make light list for this surface */
2630                 CreateTraceLightsForSurface( num, &trace );
2631
2632                 /* setup */
2633                 verts = yDrawVerts + ds->firstVert;
2634                 numAvg = 0;
2635                 memset( avgColors, 0, sizeof( avgColors ) );
2636
2637                 /* walk the surface verts */
2638                 for( i = 0; i < ds->numVerts; i++ )
2639                 {
2640                         /* get vertex luxel */
2641                         radVertLuxel = RAD_VERTEX_LUXEL( 0, ds->firstVert + i );
2642
2643                         /* color the luxel with raw lightmap num? */
2644                         if( debugSurfaces )
2645                                 VectorCopy( debugColors[ num % 12 ], radVertLuxel );
2646
2647                         /* color the luxel with luxel origin? */
2648                         else if( debugOrigin )
2649                         {
2650                                 VectorSubtract( info->maxs, info->mins, temp );
2651                                 VectorScale( temp, (1.0f / 255.0f), temp );
2652                                 VectorSubtract( origin, lm->mins, temp2 );
2653                                 radVertLuxel[ 0 ] = info->mins[ 0 ] + (temp[ 0 ] * temp2[ 0 ]);
2654                                 radVertLuxel[ 1 ] = info->mins[ 1 ] + (temp[ 1 ] * temp2[ 1 ]);
2655                                 radVertLuxel[ 2 ] = info->mins[ 2 ] + (temp[ 2 ] * temp2[ 2 ]);
2656                         }
2657
2658                         /* color the luxel with the normal */
2659                         else if( normalmap )
2660                         {
2661                                 radVertLuxel[ 0 ] = (verts[ i ].normal[ 0 ] + 1.0f) * 127.5f;
2662                                 radVertLuxel[ 1 ] = (verts[ i ].normal[ 1 ] + 1.0f) * 127.5f;
2663                                 radVertLuxel[ 2 ] = (verts[ i ].normal[ 2 ] + 1.0f) * 127.5f;
2664                         }
2665
2666                         /* illuminate the vertex */
2667                         else
2668                         {
2669                                 /* clear vertex luxel */
2670                                 VectorSet( radVertLuxel, -1.0f, -1.0f, -1.0f );
2671
2672                                 /* try at initial origin */
2673                                 trace.cluster = ClusterForPointExtFilter( verts[ i ].xyz, VERTEX_EPSILON, info->numSurfaceClusters, &surfaceClusters[ info->firstSurfaceCluster ] );
2674                                 if( trace.cluster >= 0 )
2675                                 {
2676                                         /* setup trace */
2677                                         VectorCopy( verts[ i ].xyz, trace.origin );
2678                                         VectorCopy( verts[ i ].normal, trace.normal );
2679
2680                                         /* r7 dirt */
2681                                         if( dirty )
2682                                                 dirt = DirtForSample( &trace );
2683                                         else
2684                                                 dirt = 1.0f;
2685
2686                                         /* trace */
2687                                         LightingAtSample( &trace, ds->vertexStyles, colors );
2688
2689                                         /* store */
2690                                         for( lightmapNum = 0; lightmapNum < MAX_LIGHTMAPS; lightmapNum++ )
2691                                         {
2692                                                 /* r7 dirt */
2693                                                 VectorScale( colors[ lightmapNum ], dirt, colors[ lightmapNum ] );
2694
2695                                                 /* store */
2696                                                 radVertLuxel = RAD_VERTEX_LUXEL( lightmapNum, ds->firstVert + i );
2697                                                 VectorCopy( colors[ lightmapNum ], radVertLuxel );
2698                                                 VectorAdd( avgColors[ lightmapNum ], colors[ lightmapNum ], colors[ lightmapNum ] );
2699                                         }
2700                                 }
2701
2702                                 /* is this sample bright enough? */
2703                                 radVertLuxel = RAD_VERTEX_LUXEL( 0, ds->firstVert + i );
2704                                 if( radVertLuxel[ 0 ] <= ambientColor[ 0 ] &&
2705                                         radVertLuxel[ 1 ] <= ambientColor[ 1 ] &&
2706                                         radVertLuxel[ 2 ] <= ambientColor[ 2 ] )
2707                                 {
2708                                         /* nudge the sample point around a bit */
2709                                         for( x = 0; x < 4; x++ )
2710                                         {
2711                                                 /* two's complement 0, 1, -1, 2, -2, etc */
2712                                                 x1 = ((x >> 1) ^ (x & 1 ? -1 : 0)) + (x & 1);
2713
2714                                                 for( y = 0; y < 4; y++ )
2715                                                 {
2716                                                         y1 = ((y >> 1) ^ (y & 1 ? -1 : 0)) + (y & 1);
2717
2718                                                         for( z = 0; z < 4; z++ )
2719                                                         {
2720                                                                 z1 = ((z >> 1) ^ (z & 1 ? -1 : 0)) + (z & 1);
2721
2722                                                                 /* nudge origin */
2723                                                                 trace.origin[ 0 ] = verts[ i ].xyz[ 0 ] + (VERTEX_NUDGE * x1);
2724                                                                 trace.origin[ 1 ] = verts[ i ].xyz[ 1 ] + (VERTEX_NUDGE * y1);
2725                                                                 trace.origin[ 2 ] = verts[ i ].xyz[ 2 ] + (VERTEX_NUDGE * z1);
2726
2727                                                                 /* try at nudged origin */
2728                                                                 trace.cluster = ClusterForPointExtFilter( origin, VERTEX_EPSILON, info->numSurfaceClusters, &surfaceClusters[ info->firstSurfaceCluster ] );
2729                                                                 if( trace.cluster < 0 )
2730                                                                         continue;
2731
2732                                                                 /* trace */
2733                                                                 LightingAtSample( &trace, ds->vertexStyles, colors );
2734
2735                                                                 /* store */
2736                                                                 for( lightmapNum = 0; lightmapNum < MAX_LIGHTMAPS; lightmapNum++ )
2737                                                                 {
2738                                                                         /* r7 dirt */
2739                                                                         VectorScale( colors[ lightmapNum ], dirt, colors[ lightmapNum ] );
2740
2741                                                                         /* store */
2742                                                                         radVertLuxel = RAD_VERTEX_LUXEL( lightmapNum, ds->firstVert + i );
2743                                                                         VectorCopy( colors[ lightmapNum ], radVertLuxel );
2744                                                                 }
2745
2746                                                                 /* bright enough? */
2747                                                                 radVertLuxel = RAD_VERTEX_LUXEL( 0, ds->firstVert + i );
2748                                                                 if( radVertLuxel[ 0 ] > ambientColor[ 0 ] ||
2749                                                                         radVertLuxel[ 1 ] > ambientColor[ 1 ] ||
2750                                                                         radVertLuxel[ 2 ] > ambientColor[ 2 ] )
2751                                                                         x = y = z = 1000;
2752                                                         }
2753                                                 }
2754                                         }
2755                                 }
2756
2757                                 /* add to average? */
2758                                 radVertLuxel = RAD_VERTEX_LUXEL( 0, ds->firstVert + i );
2759                                 if( radVertLuxel[ 0 ] > ambientColor[ 0 ] ||
2760                                         radVertLuxel[ 1 ] > ambientColor[ 1 ] ||
2761                                         radVertLuxel[ 2 ] > ambientColor[ 2 ] )
2762                                 {
2763                                         numAvg++;
2764                                         for( lightmapNum = 0; lightmapNum < MAX_LIGHTMAPS; lightmapNum++ )
2765                                         {
2766                                                 radVertLuxel = RAD_VERTEX_LUXEL( lightmapNum, ds->firstVert + i );
2767                                                 VectorAdd( avgColors[ lightmapNum ], radVertLuxel, avgColors[ lightmapNum ] );
2768                                         }
2769                                 }
2770                         }
2771
2772                         /* another happy customer */
2773                         numVertsIlluminated++;
2774                 }
2775
2776                 /* set average color */
2777                 if( numAvg > 0 )
2778                 {
2779                         for( lightmapNum = 0; lightmapNum < MAX_LIGHTMAPS; lightmapNum++ )
2780                                 VectorScale( avgColors[ lightmapNum ], (1.0f / numAvg), avgColors[ lightmapNum ] );
2781                 }
2782                 else
2783                 {
2784                         VectorCopy( ambientColor, avgColors[ 0 ] );
2785                 }
2786
2787                 /* clean up and store vertex color */
2788                 for( i = 0; i < ds->numVerts; i++ )
2789                 {
2790                         /* get vertex luxel */
2791                         radVertLuxel = RAD_VERTEX_LUXEL( 0, ds->firstVert + i );
2792
2793                         /* store average in occluded vertexes */
2794                         if( radVertLuxel[ 0 ] < 0.0f )
2795                         {
2796                                 for( lightmapNum = 0; lightmapNum < MAX_LIGHTMAPS; lightmapNum++ )
2797                                 {
2798                                         radVertLuxel = RAD_VERTEX_LUXEL( lightmapNum, ds->firstVert + i );
2799                                         VectorCopy( avgColors[ lightmapNum ], radVertLuxel );
2800
2801                                         /* debug code */
2802                                         //%     VectorSet( radVertLuxel, 255.0f, 0.0f, 0.0f );
2803                                 }
2804                         }
2805
2806                         /* store it */
2807                         for( lightmapNum = 0; lightmapNum < MAX_LIGHTMAPS; lightmapNum++ )
2808                         {
2809                                 /* get luxels */
2810                                 vertLuxel = VERTEX_LUXEL( lightmapNum, ds->firstVert + i );
2811                                 radVertLuxel = RAD_VERTEX_LUXEL( lightmapNum, ds->firstVert + i );
2812
2813                                 /* store */
2814                                 if( bouncing || bounce == 0 || !bounceOnly )
2815                                         VectorAdd( vertLuxel, radVertLuxel, vertLuxel );
2816                                 if( !info->si->noVertexLight )
2817                                         ColorToBytes( vertLuxel, verts[ i ].color[ lightmapNum ], info->si->vertexScale );
2818                         }
2819                 }
2820
2821                 /* free light list */
2822                 FreeTraceLights( &trace );
2823
2824                 /* return to sender */
2825                 return;
2826         }
2827
2828         /* -----------------------------------------------------------------
2829            reconstitute vertex lighting from the luxels
2830            ----------------------------------------------------------------- */
2831
2832         /* set styles from lightmap */
2833         for( lightmapNum = 0; lightmapNum < MAX_LIGHTMAPS; lightmapNum++ )
2834                 ds->vertexStyles[ lightmapNum ] = lm->styles[ lightmapNum ];
2835
2836         /* get max search radius */
2837         maxRadius = lm->sw;
2838         maxRadius = maxRadius > lm->sh ? maxRadius : lm->sh;
2839
2840         /* walk the surface verts */
2841         verts = yDrawVerts + ds->firstVert;
2842         for( i = 0; i < ds->numVerts; i++ )
2843         {
2844                 /* do each lightmap */
2845                 for( lightmapNum = 0; lightmapNum < MAX_LIGHTMAPS; lightmapNum++ )
2846                 {
2847                         /* early out */
2848                         if( lm->superLuxels[ lightmapNum ] == NULL )
2849                                 continue;
2850
2851                         /* get luxel coords */
2852                         x = verts[ i ].lightmap[ lightmapNum ][ 0 ];
2853                         y = verts[ i ].lightmap[ lightmapNum ][ 1 ];
2854                         if( x < 0 )
2855                                 x = 0;
2856                         else if( x >= lm->sw )
2857                                 x = lm->sw - 1;
2858                         if( y < 0 )
2859                                 y = 0;
2860                         else if( y >= lm->sh )
2861                                 y = lm->sh - 1;
2862
2863                         /* get vertex luxels */
2864                         vertLuxel = VERTEX_LUXEL( lightmapNum, ds->firstVert + i );
2865                         radVertLuxel = RAD_VERTEX_LUXEL( lightmapNum, ds->firstVert + i );
2866
2867                         /* color the luxel with the normal? */
2868                         if( normalmap )
2869                         {
2870                                 radVertLuxel[ 0 ] = (verts[ i ].normal[ 0 ] + 1.0f) * 127.5f;
2871                                 radVertLuxel[ 1 ] = (verts[ i ].normal[ 1 ] + 1.0f) * 127.5f;
2872                                 radVertLuxel[ 2 ] = (verts[ i ].normal[ 2 ] + 1.0f) * 127.5f;
2873                         }
2874
2875                         /* color the luxel with surface num? */
2876                         else if( debugSurfaces )
2877                                 VectorCopy( debugColors[ num % 12 ], radVertLuxel );
2878
2879                         /* divine color from the superluxels */
2880                         else
2881                         {
2882                                 /* increasing radius */
2883                                 VectorClear( radVertLuxel );
2884                                 samples = 0.0f;
2885                                 for( radius = 0; radius < maxRadius && samples <= 0.0f; radius++ )
2886                                 {
2887                                         /* sample within radius */
2888                                         for( sy = (y - radius); sy <= (y + radius); sy++ )
2889                                         {
2890                                                 if( sy < 0 || sy >= lm->sh )
2891                                                         continue;
2892
2893                                                 for( sx = (x - radius); sx <= (x + radius); sx++ )
2894                                                 {
2895                                                         if( sx < 0 || sx >= lm->sw )
2896                                                                 continue;
2897
2898                                                         /* get luxel particulars */
2899                                                         luxel = SUPER_LUXEL( lightmapNum, sx, sy );
2900                                                         cluster = SUPER_CLUSTER( sx, sy );
2901                                                         if( *cluster < 0 )
2902                                                                 continue;
2903
2904                                                         /* testing: must be brigher than ambient color */
2905                                                         //%     if( luxel[ 0 ] <= ambientColor[ 0 ] || luxel[ 1 ] <= ambientColor[ 1 ] || luxel[ 2 ] <= ambientColor[ 2 ] )
2906                                                         //%             continue;
2907
2908                                                         /* add its distinctiveness to our own */
2909                                                         VectorAdd( radVertLuxel, luxel, radVertLuxel );
2910                                                         samples += luxel[ 3 ];
2911                                                 }
2912                                         }
2913                                 }
2914
2915                                 /* any color? */
2916                                 if( samples > 0.0f )
2917                                         VectorDivide( radVertLuxel, samples, radVertLuxel );
2918                                 else
2919                                         VectorCopy( ambientColor, radVertLuxel );
2920                         }
2921
2922                         /* store into floating point storage */
2923                         VectorAdd( vertLuxel, radVertLuxel, vertLuxel );
2924                         numVertsIlluminated++;
2925
2926                         /* store into bytes (for vertex approximation) */
2927                         if( !info->si->noVertexLight )
2928                                 ColorToBytes( vertLuxel, verts[ i ].color[ lightmapNum ], 1.0f );
2929                 }
2930         }
2931 }
2932
2933
2934
2935 /* -------------------------------------------------------------------------------
2936
2937 light optimization (-fast)
2938
2939 creates a list of lights that will affect a surface and stores it in tw
2940 this is to optimize surface lighting by culling out as many of the
2941 lights in the world as possible from further calculation
2942
2943 ------------------------------------------------------------------------------- */
2944
2945 /*
2946 SetupBrushes()
2947 determines opaque brushes in the world and find sky shaders for sunlight calculations
2948 */
2949
2950 void SetupBrushes( void )
2951 {
2952         int                             i, j, b, compileFlags;
2953         qboolean                inside;
2954         bspBrush_t              *brush;
2955         bspBrushSide_t  *side;
2956         bspShader_t             *shader;
2957         shaderInfo_t    *si;
2958
2959
2960         /* note it */
2961         Sys_FPrintf( SYS_VRB, "--- SetupBrushes ---\n" );
2962
2963         /* allocate */
2964         if( opaqueBrushes == NULL )
2965                 opaqueBrushes = safe_malloc( numBSPBrushes / 8 + 1 );
2966
2967         /* clear */
2968         memset( opaqueBrushes, 0, numBSPBrushes / 8 + 1 );
2969         numOpaqueBrushes = 0;
2970
2971         /* walk the list of worldspawn brushes */
2972         for( i = 0; i < bspModels[ 0 ].numBSPBrushes; i++ )
2973         {
2974                 /* get brush */
2975                 b = bspModels[ 0 ].firstBSPBrush + i;
2976                 brush = &bspBrushes[ b ];
2977
2978                 /* check all sides */
2979                 inside = qtrue;
2980                 compileFlags = 0;
2981                 for( j = 0; j < brush->numSides && inside; j++ )
2982                 {
2983                         /* do bsp shader calculations */
2984                         side = &bspBrushSides[ brush->firstSide + j ];
2985                         shader = &bspShaders[ side->shaderNum ];
2986
2987                         /* get shader info */
2988                         si = ShaderInfoForShader( shader->shader );
2989                         if( si == NULL )
2990                                 continue;
2991
2992                         /* or together compile flags */
2993                         compileFlags |= si->compileFlags;
2994                 }
2995
2996                 /* determine if this brush is opaque to light */
2997                 if( !(compileFlags & C_TRANSLUCENT) )
2998                 {
2999                         opaqueBrushes[ b >> 3 ] |= (1 << (b & 7));
3000                         numOpaqueBrushes++;
3001                         maxOpaqueBrush = i;
3002                 }
3003         }
3004
3005         /* emit some statistics */
3006         Sys_FPrintf( SYS_VRB, "%9d opaque brushes\n", numOpaqueBrushes );
3007 }
3008
3009
3010
3011 /*
3012 ClusterVisible()
3013 determines if two clusters are visible to each other using the PVS
3014 */
3015
3016 qboolean ClusterVisible( int a, int b )
3017 {
3018         int                     portalClusters, leafBytes;
3019         byte            *pvs;
3020
3021
3022         /* dummy check */
3023         if( a < 0 || b < 0 )
3024                 return qfalse;
3025
3026         /* early out */
3027         if( a == b )
3028                 return qtrue;
3029
3030         /* not vised? */
3031         if( numBSPVisBytes <=8 )
3032                 return qtrue;
3033
3034         /* get pvs data */
3035         portalClusters = ((int *) bspVisBytes)[ 0 ];
3036         leafBytes = ((int*) bspVisBytes)[ 1 ];
3037         pvs = bspVisBytes + VIS_HEADER_SIZE + (a * leafBytes);
3038
3039         /* check */
3040         if( (pvs[ b >> 3 ] & (1 << (b & 7))) )
3041                 return qtrue;
3042         return qfalse;
3043 }
3044
3045
3046
3047 /*
3048 PointInLeafNum_r()
3049 borrowed from vlight.c
3050 */
3051
3052 int     PointInLeafNum_r( vec3_t point, int nodenum )
3053 {
3054         int                     leafnum;
3055         vec_t           dist;
3056         bspNode_t               *node;
3057         bspPlane_t      *plane;
3058
3059
3060         while( nodenum >= 0 )
3061         {
3062                 node = &bspNodes[ nodenum ];
3063                 plane = &bspPlanes[ node->planeNum ];
3064                 dist = DotProduct( point, plane->normal ) - plane->dist;
3065                 if( dist > 0.1 )
3066                         nodenum = node->children[ 0 ];
3067                 else if( dist < -0.1 )
3068                         nodenum = node->children[ 1 ];
3069                 else
3070                 {
3071                         leafnum = PointInLeafNum_r( point, node->children[ 0 ] );
3072                         if( bspLeafs[ leafnum ].cluster != -1 )
3073                                 return leafnum;
3074                         nodenum = node->children[ 1 ];
3075                 }
3076         }
3077
3078         leafnum = -nodenum - 1;
3079         return leafnum;
3080 }
3081
3082
3083
3084 /*
3085 PointInLeafnum()
3086 borrowed from vlight.c
3087 */
3088
3089 int     PointInLeafNum( vec3_t point )
3090 {
3091         return PointInLeafNum_r( point, 0 );
3092 }
3093
3094
3095
3096 /*
3097 ClusterVisibleToPoint() - ydnar
3098 returns qtrue if point can "see" cluster
3099 */
3100
3101 qboolean ClusterVisibleToPoint( vec3_t point, int cluster )
3102 {
3103         int             pointCluster;
3104
3105
3106         /* get leafNum for point */
3107         pointCluster = ClusterForPoint( point );
3108         if( pointCluster < 0 )
3109                 return qfalse;
3110
3111         /* check pvs */
3112         return ClusterVisible( pointCluster, cluster );
3113 }
3114
3115
3116
3117 /*
3118 ClusterForPoint() - ydnar
3119 returns the pvs cluster for point
3120 */
3121
3122 int ClusterForPoint( vec3_t point )
3123 {
3124         int             leafNum;
3125
3126
3127         /* get leafNum for point */
3128         leafNum = PointInLeafNum( point );
3129         if( leafNum < 0 )
3130                 return -1;
3131
3132         /* return the cluster */
3133         return bspLeafs[ leafNum ].cluster;
3134 }
3135
3136
3137
3138 /*
3139 ClusterForPointExt() - ydnar
3140 also takes brushes into account for occlusion testing
3141 */
3142
3143 int ClusterForPointExt( vec3_t point, float epsilon )
3144 {
3145         int                             i, j, b, leafNum, cluster;
3146         float                   dot;
3147         qboolean                inside;
3148         int                             *brushes, numBSPBrushes;
3149         bspLeaf_t               *leaf;
3150         bspBrush_t              *brush;
3151         bspPlane_t              *plane;
3152
3153
3154         /* get leaf for point */
3155         leafNum = PointInLeafNum( point );
3156         if( leafNum < 0 )
3157                 return -1;
3158         leaf = &bspLeafs[ leafNum ];
3159
3160         /* get the cluster */
3161         cluster = leaf->cluster;
3162         if( cluster < 0 )
3163                 return -1;
3164
3165         /* transparent leaf, so check point against all brushes in the leaf */
3166         brushes = &bspLeafBrushes[ leaf->firstBSPLeafBrush ];
3167         numBSPBrushes = leaf->numBSPLeafBrushes;
3168         for( i = 0; i < numBSPBrushes; i++ )
3169         {
3170                 /* get parts */
3171                 b = brushes[ i ];
3172                 if( b > maxOpaqueBrush )
3173                         continue;
3174                 brush = &bspBrushes[ b ];
3175                 if( !(opaqueBrushes[ b >> 3 ] & (1 << (b & 7))) )
3176                         continue;
3177
3178                 /* check point against all planes */
3179                 inside = qtrue;
3180                 for( j = 0; j < brush->numSides && inside; j++ )
3181                 {
3182                         plane = &bspPlanes[ bspBrushSides[ brush->firstSide + j ].planeNum ];
3183                         dot = DotProduct( point, plane->normal );
3184                         dot -= plane->dist;
3185                         if( dot > epsilon )
3186                                 inside = qfalse;
3187                 }
3188
3189                 /* if inside, return bogus cluster */
3190                 if( inside )
3191                         return -1 - b;
3192         }
3193
3194         /* if the point made it this far, it's not inside any opaque brushes */
3195         return cluster;
3196 }
3197
3198
3199
3200 /*
3201 ClusterForPointExtFilter() - ydnar
3202 adds cluster checking against a list of known valid clusters
3203 */
3204
3205 int ClusterForPointExtFilter( vec3_t point, float epsilon, int numClusters, int *clusters )
3206 {
3207         int             i, cluster;
3208
3209
3210         /* get cluster for point */
3211         cluster = ClusterForPointExt( point, epsilon );
3212
3213         /* check if filtering is necessary */
3214         if( cluster < 0 || numClusters <= 0 || clusters == NULL )
3215                 return cluster;
3216
3217         /* filter */
3218         for( i = 0; i < numClusters; i++ )
3219         {
3220                 if( cluster == clusters[ i ] || ClusterVisible( cluster, clusters[ i ] ) )
3221                         return cluster;
3222         }
3223
3224         /* failed */
3225         return -1;
3226 }
3227
3228
3229
3230 /*
3231 ShaderForPointInLeaf() - ydnar
3232 checks a point against all brushes in a leaf, returning the shader of the brush
3233 also sets the cumulative surface and content flags for the brush hit
3234 */
3235
3236 int ShaderForPointInLeaf( vec3_t point, int leafNum, float epsilon, int wantContentFlags, int wantSurfaceFlags, int *contentFlags, int *surfaceFlags )
3237 {
3238         int                             i, j;
3239         float                   dot;
3240         qboolean                inside;
3241         int                             *brushes, numBSPBrushes;
3242         bspLeaf_t                       *leaf;
3243         bspBrush_t              *brush;
3244         bspBrushSide_t  *side;
3245         bspPlane_t              *plane;
3246         bspShader_t             *shader;
3247         int                             allSurfaceFlags, allContentFlags;
3248
3249
3250         /* clear things out first */
3251         *surfaceFlags = 0;
3252         *contentFlags = 0;
3253
3254         /* get leaf */
3255         if( leafNum < 0 )
3256                 return -1;
3257         leaf = &bspLeafs[ leafNum ];
3258
3259         /* transparent leaf, so check point against all brushes in the leaf */
3260         brushes = &bspLeafBrushes[ leaf->firstBSPLeafBrush ];
3261         numBSPBrushes = leaf->numBSPLeafBrushes;
3262         for( i = 0; i < numBSPBrushes; i++ )
3263         {
3264                 /* get parts */
3265                 brush = &bspBrushes[ brushes[ i ] ];
3266
3267                 /* check point against all planes */
3268                 inside = qtrue;
3269                 allSurfaceFlags = 0;
3270                 allContentFlags = 0;
3271                 for( j = 0; j < brush->numSides && inside; j++ )
3272                 {
3273                         side = &bspBrushSides[ brush->firstSide + j ];
3274                         plane = &bspPlanes[ side->planeNum ];
3275                         dot = DotProduct( point, plane->normal );
3276                         dot -= plane->dist;
3277                         if( dot > epsilon )
3278                                 inside = qfalse;
3279                         else
3280                         {
3281                                 shader = &bspShaders[ side->shaderNum ];
3282                                 allSurfaceFlags |= shader->surfaceFlags;
3283                                 allContentFlags |= shader->contentFlags;
3284                         }
3285                 }
3286
3287                 /* handle if inside */
3288                 if( inside )
3289                 {
3290                         /* if there are desired flags, check for same and continue if they aren't matched */
3291                         if( wantContentFlags && !(wantContentFlags & allContentFlags) )
3292                                 continue;
3293                         if( wantSurfaceFlags && !(wantSurfaceFlags & allSurfaceFlags) )
3294                                 continue;
3295
3296                         /* store the cumulative flags and return the brush shader (which is mostly useless) */
3297                         *surfaceFlags = allSurfaceFlags;
3298                         *contentFlags = allContentFlags;
3299                         return brush->shaderNum;
3300                 }
3301         }
3302
3303         /* if the point made it this far, it's not inside any brushes */
3304         return -1;
3305 }
3306
3307
3308
3309 /*
3310 ChopBounds()
3311 chops a bounding box by the plane defined by origin and normal
3312 returns qfalse if the bounds is entirely clipped away
3313
3314 this is not exactly the fastest way to do this...
3315 */
3316
3317 qboolean ChopBounds( vec3_t mins, vec3_t maxs, vec3_t origin, vec3_t normal )
3318 {
3319         /* FIXME: rewrite this so it doesn't use bloody brushes */
3320         return qtrue;
3321 }
3322
3323
3324
3325 /*
3326 SetupEnvelopes()
3327 calculates each light's effective envelope,
3328 taking into account brightness, type, and pvs.
3329 */
3330
3331 #define LIGHT_EPSILON   0.125f
3332 #define LIGHT_NUDGE             2.0f
3333
3334 void SetupEnvelopes( qboolean forGrid, qboolean fastFlag )
3335 {
3336         int                     i, x, y, z, x1, y1, z1;
3337         light_t         *light, *light2, **owner;
3338         bspLeaf_t       *leaf;
3339         vec3_t          origin, dir, mins, maxs, nullVector = { 0, 0, 0 };
3340         float           radius, intensity;
3341         light_t         *buckets[ 256 ];
3342
3343
3344         /* early out for weird cases where there are no lights */
3345         if( lights == NULL )
3346                 return;
3347
3348         /* note it */
3349         Sys_FPrintf( SYS_VRB, "--- SetupEnvelopes%s ---\n", fastFlag ? " (fast)" : "" );
3350
3351         /* count lights */
3352         numLights = 0;
3353         numCulledLights = 0;
3354         owner = &lights;
3355         while( *owner != NULL )
3356         {
3357                 /* get light */
3358                 light = *owner;
3359
3360                 /* handle negative lights */
3361                 if( light->photons < 0.0f || light->add < 0.0f )
3362                 {
3363                         light->photons *= -1.0f;
3364                         light->add *= -1.0f;
3365                         light->flags |= LIGHT_NEGATIVE;
3366                 }
3367
3368                 /* sunlight? */
3369                 if( light->type == EMIT_SUN )
3370                 {
3371                         /* special cased */
3372                         light->cluster = 0;
3373                         light->envelope = MAX_WORLD_COORD * 8.0f;
3374                         VectorSet( light->mins, MIN_WORLD_COORD * 8.0f, MIN_WORLD_COORD * 8.0f, MIN_WORLD_COORD * 8.0f );
3375                         VectorSet( light->maxs, MAX_WORLD_COORD * 8.0f, MAX_WORLD_COORD * 8.0f, MAX_WORLD_COORD * 8.0f );
3376                 }
3377
3378                 /* everything else */
3379                 else
3380                 {
3381                         /* get pvs cluster for light */
3382                         light->cluster = ClusterForPointExt( light->origin, LIGHT_EPSILON );
3383
3384                         /* invalid cluster? */
3385                         if( light->cluster < 0 )
3386                         {
3387                                 /* nudge the sample point around a bit */
3388                                 for( x = 0; x < 4; x++ )
3389                                 {
3390                                         /* two's complement 0, 1, -1, 2, -2, etc */
3391                                         x1 = ((x >> 1) ^ (x & 1 ? -1 : 0)) + (x & 1);
3392
3393                                         for( y = 0; y < 4; y++ )
3394                                         {
3395                                                 y1 = ((y >> 1) ^ (y & 1 ? -1 : 0)) + (y & 1);
3396
3397                                                 for( z = 0; z < 4; z++ )
3398                                                 {
3399                                                         z1 = ((z >> 1) ^ (z & 1 ? -1 : 0)) + (z & 1);
3400
3401                                                         /* nudge origin */
3402                                                         origin[ 0 ] = light->origin[ 0 ] + (LIGHT_NUDGE * x1);
3403                                                         origin[ 1 ] = light->origin[ 1 ] + (LIGHT_NUDGE * y1);
3404                                                         origin[ 2 ] = light->origin[ 2 ] + (LIGHT_NUDGE * z1);
3405
3406                                                         /* try at nudged origin */
3407                                                         light->cluster = ClusterForPointExt( origin, LIGHT_EPSILON );
3408                                                         if( light->cluster < 0 )
3409                                                                 continue;
3410
3411                                                         /* set origin */
3412                                                         VectorCopy( origin, light->origin );
3413                                                 }
3414                                         }
3415                                 }
3416                         }
3417
3418                         /* only calculate for lights in pvs and outside of opaque brushes */
3419                         if( light->cluster >= 0 )
3420                         {
3421                                 /* set light fast flag */
3422                                 if( fastFlag )
3423                                         light->flags |= LIGHT_FAST_TEMP;
3424                                 else
3425                                         light->flags &= ~LIGHT_FAST_TEMP;
3426                                 if( light->si && light->si->noFast )
3427                                         light->flags &= ~(LIGHT_FAST | LIGHT_FAST_TEMP);
3428
3429                                 /* clear light envelope */
3430                                 light->envelope = 0;
3431
3432                                 /* handle area lights */
3433                                 if( exactPointToPolygon && light->type == EMIT_AREA && light->w != NULL )
3434                                 {
3435                                         /* ugly hack to calculate extent for area lights, but only done once */
3436                                         VectorScale( light->normal, -1.0f, dir );
3437                                         for( radius = 100.0f; radius < 130000.0f && light->envelope == 0; radius += 10.0f )
3438                                         {
3439                                                 float   factor;
3440
3441                                                 VectorMA( light->origin, radius, light->normal, origin );
3442                                                 factor = PointToPolygonFormFactor( origin, dir, light->w );
3443                                                 if( factor < 0.0f )
3444                                                         factor *= -1.0f;
3445                                                 if( (factor * light->add) <= light->falloffTolerance )
3446                                                         light->envelope = radius;
3447                                         }
3448
3449                                         /* check for fast mode */
3450                                         if( !(light->flags & LIGHT_FAST) && !(light->flags & LIGHT_FAST_TEMP) )
3451                                                 light->envelope = MAX_WORLD_COORD * 8.0f;
3452                                 }
3453                                 else
3454                                 {
3455                                         radius = 0.0f;
3456                                         intensity = light->photons;
3457                                 }
3458
3459                                 /* other calcs */
3460                                 if( light->envelope <= 0.0f )
3461                                 {
3462                                         /* solve distance for non-distance lights */
3463                                         if( !(light->flags & LIGHT_ATTEN_DISTANCE) )
3464                                                 light->envelope = MAX_WORLD_COORD * 8.0f;
3465
3466                                         /* solve distance for linear lights */
3467                                         else if( (light->flags & LIGHT_ATTEN_LINEAR ) )
3468                                                 //% light->envelope = ((intensity / light->falloffTolerance) * linearScale - 1 + radius) / light->fade;
3469                                                 light->envelope = ((intensity * linearScale) - light->falloffTolerance) / light->fade;
3470
3471                                                 /*
3472                                                 add = angle * light->photons * linearScale - (dist * light->fade);
3473                                                 T = (light->photons * linearScale) - (dist * light->fade);
3474                                                 T + (dist * light->fade) = (light->photons * linearScale);
3475                                                 dist * light->fade = (light->photons * linearScale) - T;
3476                                                 dist = ((light->photons * linearScale) - T) / light->fade;
3477                                                 */
3478
3479                                         /* solve for inverse square falloff */
3480                                         else
3481                                                 light->envelope = sqrt( intensity / light->falloffTolerance ) + radius;
3482
3483                                                 /*
3484                                                 add = light->photons / (dist * dist);
3485                                                 T = light->photons / (dist * dist);
3486                                                 T * (dist * dist) = light->photons;
3487                                                 dist = sqrt( light->photons / T );
3488                                                 */
3489                                 }
3490
3491                                 /* chop radius against pvs */
3492                                 {
3493                                         /* clear bounds */
3494                                         ClearBounds( mins, maxs );
3495
3496                                         /* check all leaves */
3497                                         for( i = 0; i < numBSPLeafs; i++ )
3498                                         {
3499                                                 /* get test leaf */
3500                                                 leaf = &bspLeafs[ i ];
3501
3502                                                 /* in pvs? */
3503                                                 if( leaf->cluster < 0 )
3504                                                         continue;
3505                                                 if( ClusterVisible( light->cluster, leaf->cluster ) == qfalse ) /* ydnar: thanks Arnout for exposing my stupid error (this never failed before) */
3506                                                         continue;
3507
3508                                                 /* add this leafs bbox to the bounds */
3509                                                 VectorCopy( leaf->mins, origin );
3510                                                 AddPointToBounds( origin, mins, maxs );
3511                                                 VectorCopy( leaf->maxs, origin );
3512                                                 AddPointToBounds( origin, mins, maxs );
3513                                         }
3514
3515                                         /* test to see if bounds encompass light */
3516                                         for( i = 0; i < 3; i++ )
3517                                         {
3518                                                 if( mins[ i ] > light->origin[ i ] || maxs[ i ] < light->origin[ i ] )
3519                                                 {
3520                                                         //% Sys_Printf( "WARNING: Light PVS bounds (%.0f, %.0f, %.0f) -> (%.0f, %.0f, %.0f)\ndo not encompass light %d (%f, %f, %f)\n",
3521                                                         //%     mins[ 0 ], mins[ 1 ], mins[ 2 ],
3522                                                         //%     maxs[ 0 ], maxs[ 1 ], maxs[ 2 ],
3523                                                         //%     numLights, light->origin[ 0 ], light->origin[ 1 ], light->origin[ 2 ] );
3524                                                         AddPointToBounds( light->origin, mins, maxs );
3525                                                 }
3526                                         }
3527
3528                                         /* chop the bounds by a plane for area lights and spotlights */
3529                                         if( light->type == EMIT_AREA || light->type == EMIT_SPOT )
3530                                                 ChopBounds( mins, maxs, light->origin, light->normal );
3531
3532                                         /* copy bounds */
3533                                         VectorCopy( mins, light->mins );
3534                                         VectorCopy( maxs, light->maxs );
3535
3536                                         /* reflect bounds around light origin */
3537                                         //%     VectorMA( light->origin, -1.0f, origin, origin );
3538                                         VectorScale( light->origin, 2, origin );
3539                                         VectorSubtract( origin, maxs, origin );
3540                                         AddPointToBounds( origin, mins, maxs );
3541                                         //%     VectorMA( light->origin, -1.0f, mins, origin );
3542                                         VectorScale( light->origin, 2, origin );
3543                                         VectorSubtract( origin, mins, origin );
3544                                         AddPointToBounds( origin, mins, maxs );
3545
3546                                         /* calculate spherical bounds */
3547                                         VectorSubtract( maxs, light->origin, dir );
3548                                         radius = (float) VectorLength( dir );
3549
3550                                         /* if this radius is smaller than the envelope, then set the envelope to it */
3551                                         if( radius < light->envelope )
3552                                         {
3553                                                 light->envelope = radius;
3554                                                 //%     Sys_FPrintf( SYS_VRB, "PVS Cull (%d): culled\n", numLights );
3555                                         }
3556                                         //%     else
3557                                         //%             Sys_FPrintf( SYS_VRB, "PVS Cull (%d): failed (%8.0f > %8.0f)\n", numLights, radius, light->envelope );
3558                                 }
3559
3560                                 /* add grid/surface only check */
3561                                 if( forGrid )
3562                                 {
3563                                         if( !(light->flags & LIGHT_GRID) )
3564                                                 light->envelope = 0.0f;
3565                                 }
3566                                 else
3567                                 {
3568                                         if( !(light->flags & LIGHT_SURFACES) )
3569                                                 light->envelope = 0.0f;
3570                                 }
3571                         }
3572
3573                         /* culled? */
3574                         if( light->cluster < 0 || light->envelope <= 0.0f )
3575                         {
3576                                 /* debug code */
3577                                 //%     Sys_Printf( "Culling light: Cluster: %d Envelope: %f\n", light->cluster, light->envelope );
3578
3579                                 /* delete the light */
3580                                 numCulledLights++;
3581                                 *owner = light->next;
3582                                 if( light->w != NULL )
3583                                         free( light->w );
3584                                 free( light );
3585                                 continue;
3586                         }
3587                 }
3588
3589                 /* square envelope */
3590                 light->envelope2 = (light->envelope * light->envelope);
3591
3592                 /* increment light count */
3593                 numLights++;
3594
3595                 /* set next light */
3596                 owner = &((**owner).next);
3597         }
3598
3599         /* bucket sort lights by style */
3600         memset( buckets, 0, sizeof( buckets ) );
3601         light2 = NULL;
3602         for( light = lights; light != NULL; light = light2 )
3603         {
3604                 /* get next light */
3605                 light2 = light->next;
3606
3607                 /* filter into correct bucket */
3608                 light->next = buckets[ light->style ];
3609                 buckets[ light->style ] = light;
3610
3611                 /* if any styled light is present, automatically set nocollapse */
3612                 if( light->style != LS_NORMAL )
3613                         noCollapse = qtrue;
3614         }
3615
3616         /* filter back into light list */
3617         lights = NULL;
3618         for( i = 255; i >= 0; i-- )
3619         {
3620                 light2 = NULL;
3621                 for( light = buckets[ i ]; light != NULL; light = light2 )
3622                 {
3623                         light2 = light->next;
3624                         light->next = lights;
3625                         lights = light;
3626                 }
3627         }
3628
3629         /* emit some statistics */
3630         Sys_Printf( "%9d total lights\n", numLights );
3631         Sys_Printf( "%9d culled lights\n", numCulledLights );
3632 }
3633
3634
3635
3636 /*
3637 CreateTraceLightsForBounds()
3638 creates a list of lights that affect the given bounding box and pvs clusters (bsp leaves)
3639 */
3640
3641 void CreateTraceLightsForBounds( vec3_t mins, vec3_t maxs, vec3_t normal, int numClusters, int *clusters, int flags, trace_t *trace )
3642 {
3643         int                     i;
3644         light_t         *light;
3645         vec3_t          origin, dir, nullVector = { 0.0f, 0.0f, 0.0f };
3646         float           radius, dist, length;
3647
3648
3649         /* potential pre-setup  */
3650         if( numLights == 0 )
3651                 SetupEnvelopes( qfalse, fast );
3652
3653         /* debug code */
3654         //% Sys_Printf( "CTWLFB: (%4.1f %4.1f %4.1f) (%4.1f %4.1f %4.1f)\n", mins[ 0 ], mins[ 1 ], mins[ 2 ], maxs[ 0 ], maxs[ 1 ], maxs[ 2 ] );
3655
3656         /* allocate the light list */
3657         trace->lights = safe_malloc( sizeof( light_t* ) * (numLights + 1) );
3658         trace->numLights = 0;
3659
3660         /* calculate spherical bounds */
3661         VectorAdd( mins, maxs, origin );
3662         VectorScale( origin, 0.5f, origin );
3663         VectorSubtract( maxs, origin, dir );
3664         radius = (float) VectorLength( dir );
3665
3666         /* get length of normal vector */
3667         if( normal != NULL )
3668                 length = VectorLength( normal );
3669         else
3670         {
3671                 normal = nullVector;
3672                 length = 0;
3673         }
3674
3675         /* test each light and see if it reaches the sphere */
3676         /* note: the attenuation code MUST match LightingAtSample() */
3677         for( light = lights; light; light = light->next )
3678         {
3679                 /* check zero sized envelope */
3680                 if( light->envelope <= 0 )
3681                 {
3682                         lightsEnvelopeCulled++;
3683                         continue;
3684                 }
3685
3686                 /* check flags */
3687                 if( !(light->flags & flags) )
3688                         continue;
3689
3690                 /* sunlight skips all this nonsense */
3691                 if( light->type != EMIT_SUN )
3692                 {
3693                         /* sun only? */
3694                         if( sunOnly )
3695                                 continue;
3696
3697                         /* check against pvs cluster */
3698                         if( numClusters > 0 && clusters != NULL )
3699                         {
3700                                 for( i = 0; i < numClusters; i++ )
3701                                 {
3702                                         if( ClusterVisible( light->cluster, clusters[ i ] ) )
3703                                                 break;
3704                                 }
3705
3706                                 /* fixme! */
3707                                 if( i == numClusters )
3708                                 {
3709                                         lightsClusterCulled++;
3710                                         continue;
3711                                 }
3712                         }
3713
3714                         /* if the light's bounding sphere intersects with the bounding sphere then this light needs to be tested */
3715                         VectorSubtract( light->origin, origin, dir );
3716                         dist = VectorLength( dir );
3717                         dist -= light->envelope;
3718                         dist -= radius;
3719                         if( dist > 0 )
3720                         {
3721                                 lightsEnvelopeCulled++;
3722                                 continue;
3723                         }
3724
3725                         /* check bounding box against light's pvs envelope (note: this code never eliminated any lights, so disabling it) */
3726                         #if 0
3727                         skip = qfalse;
3728                         for( i = 0; i < 3; i++ )
3729                         {
3730                                 if( mins[ i ] > light->maxs[ i ] || maxs[ i ] < light->mins[ i ] )
3731                                         skip = qtrue;
3732                         }
3733                         if( skip )
3734                         {
3735                                 lightsBoundsCulled++;
3736                                 continue;
3737                         }
3738                         #endif
3739                 }
3740
3741                 /* planar surfaces (except twosided surfaces) have a couple more checks */
3742                 if( length > 0.0f && trace->twoSided == qfalse )
3743                 {
3744                         /* lights coplanar with a surface won't light it */
3745                         if( !(light->flags & LIGHT_TWOSIDED) && DotProduct( light->normal, normal ) > 0.999f )
3746                         {
3747                                 lightsPlaneCulled++;
3748                                 continue;
3749                         }
3750
3751                         /* check to see if light is behind the plane */
3752                         if( DotProduct( light->origin, normal ) - DotProduct( origin, normal ) < -1.0f )
3753                         {
3754                                 lightsPlaneCulled++;
3755                                 continue;
3756                         }
3757                 }
3758
3759                 /* add this light */
3760                 trace->lights[ trace->numLights++ ] = light;
3761         }
3762
3763         /* make last night null */
3764         trace->lights[ trace->numLights ] = NULL;
3765 }
3766
3767
3768
3769 void FreeTraceLights( trace_t *trace )
3770 {
3771         if( trace->lights != NULL )
3772                 free( trace->lights );
3773 }
3774
3775
3776
3777 /*
3778 CreateTraceLightsForSurface()
3779 creates a list of lights that can potentially affect a drawsurface
3780 */
3781
3782 void CreateTraceLightsForSurface( int num, trace_t *trace )
3783 {
3784         int                                     i;
3785         vec3_t                          mins, maxs, normal;
3786         bspDrawVert_t           *dv;
3787         bspDrawSurface_t        *ds;
3788         surfaceInfo_t           *info;
3789
3790
3791         /* dummy check */
3792         if( num < 0 )
3793                 return;
3794
3795         /* get drawsurface and info */
3796         ds = &bspDrawSurfaces[ num ];
3797         info = &surfaceInfos[ num ];
3798
3799         /* get the mins/maxs for the dsurf */
3800         ClearBounds( mins, maxs );
3801         VectorCopy( bspDrawVerts[ ds->firstVert ].normal, normal );
3802         for( i = 0; i < ds->numVerts; i++ )
3803         {
3804                 dv = &yDrawVerts[ ds->firstVert + i ];
3805                 AddPointToBounds( dv->xyz, mins, maxs );
3806                 if( !VectorCompare( dv->normal, normal ) )
3807                         VectorClear( normal );
3808         }
3809
3810         /* create the lights for the bounding box */
3811         CreateTraceLightsForBounds( mins, maxs, normal, info->numSurfaceClusters, &surfaceClusters[ info->firstSurfaceCluster ], LIGHT_SURFACES, trace );
3812 }
3813
3814 /////////////////////////////////////////////////////////////
3815
3816 #define FLOODLIGHT_CONE_ANGLE                   88      /* degrees */
3817 #define FLOODLIGHT_NUM_ANGLE_STEPS              16
3818 #define FLOODLIGHT_NUM_ELEVATION_STEPS  4
3819 #define FLOODLIGHT_NUM_VECTORS                  (FLOODLIGHT_NUM_ANGLE_STEPS * FLOODLIGHT_NUM_ELEVATION_STEPS)
3820
3821 static vec3_t   floodVectors[ FLOODLIGHT_NUM_VECTORS ];
3822 static int              numFloodVectors = 0;
3823
3824 void SetupFloodLight( void )
3825 {
3826         int             i, j;
3827         float   angle, elevation, angleStep, elevationStep;
3828         const char      *value;
3829         double v1,v2,v3,v4,v5;
3830
3831         /* note it */
3832         Sys_FPrintf( SYS_VRB, "--- SetupFloodLight ---\n" );
3833
3834         /* calculate angular steps */
3835         angleStep = DEG2RAD( 360.0f / FLOODLIGHT_NUM_ANGLE_STEPS );
3836         elevationStep = DEG2RAD( FLOODLIGHT_CONE_ANGLE / FLOODLIGHT_NUM_ELEVATION_STEPS );
3837
3838         /* iterate angle */
3839         angle = 0.0f;
3840         for( i = 0, angle = 0.0f; i < FLOODLIGHT_NUM_ANGLE_STEPS; i++, angle += angleStep )
3841         {
3842                 /* iterate elevation */
3843                 for( j = 0, elevation = elevationStep * 0.5f; j < FLOODLIGHT_NUM_ELEVATION_STEPS; j++, elevation += elevationStep )
3844                 {
3845                         floodVectors[ numFloodVectors ][ 0 ] = sin( elevation ) * cos( angle );
3846                         floodVectors[ numFloodVectors ][ 1 ] = sin( elevation ) * sin( angle );
3847                         floodVectors[ numFloodVectors ][ 2 ] = cos( elevation );
3848                         numFloodVectors++;
3849                 }
3850         }
3851
3852         /* emit some statistics */
3853         Sys_FPrintf( SYS_VRB, "%9d numFloodVectors\n", numFloodVectors );
3854
3855       /* floodlight */
3856         value = ValueForKey( &entities[ 0 ], "_floodlight" );
3857
3858         if( value[ 0 ] != '\0' )
3859         {
3860                 v1=v2=v3=0;
3861                 v4=floodlightDistance;
3862                 v5=floodlightIntensity;
3863
3864                 sscanf( value, "%lf %lf %lf %lf %lf", &v1, &v2, &v3, &v4, &v5);
3865
3866                 floodlightRGB[0]=v1;
3867                 floodlightRGB[1]=v2;
3868                 floodlightRGB[2]=v3;
3869
3870                 if (VectorLength(floodlightRGB)==0)
3871                 {
3872                         VectorSet(floodlightRGB,240,240,255);
3873                 }
3874
3875                 if (v4<1) v4=1024;
3876                 if (v5<1) v5=128;
3877
3878                 floodlightDistance=v4;
3879                 floodlightIntensity=v5;
3880
3881                 floodlighty = qtrue;
3882                 Sys_Printf( "FloodLighting enabled via worldspawn _floodlight key.\n" );
3883         }
3884         else
3885         {
3886                 VectorSet(floodlightRGB,240,240,255);
3887                 //floodlighty = qtrue;
3888                 //Sys_Printf( "FloodLighting enabled via worldspawn _floodlight key.\n" );
3889         }
3890         VectorNormalize(floodlightRGB,floodlightRGB);
3891 }
3892
3893 //27 - lighttracer style ambient occlusion light hack.
3894 //Kudos to the dirtmapping author for most of this source.
3895 void FloodLightRawLightmap( int rawLightmapNum )
3896 {
3897         int                                     i, x, y, sx, sy, *cluster;
3898         float                           *origin, *normal, *floodlight, *floodlight2, average, samples;
3899         rawLightmap_t           *lm;
3900         surfaceInfo_t           *info;
3901         trace_t                         trace;
3902
3903         /* bail if this number exceeds the number of raw lightmaps */
3904         if( rawLightmapNum >= numRawLightmaps )
3905                 return;
3906
3907         /* get lightmap */
3908         lm = &rawLightmaps[ rawLightmapNum ];
3909
3910         memset(&trace,0,sizeof(trace_t));
3911         /* setup trace */
3912         trace.testOcclusion = qtrue;
3913         trace.forceSunlight = qfalse;
3914         trace.twoSided = qtrue;
3915         trace.recvShadows = lm->recvShadows;
3916         trace.numSurfaces = lm->numLightSurfaces;
3917         trace.surfaces = &lightSurfaces[ lm->firstLightSurface ];
3918         trace.inhibitRadius = DEFAULT_INHIBIT_RADIUS;
3919         trace.testAll = qfalse;
3920         trace.distance = 1024;
3921
3922         /* twosided lighting (may or may not be a good idea for lightmapped stuff) */
3923         //trace.twoSided = qfalse;
3924         for( i = 0; i < trace.numSurfaces; i++ )
3925         {
3926                 /* get surface */
3927                 info = &surfaceInfos[ trace.surfaces[ i ] ];
3928
3929                 /* check twosidedness */
3930                 if( info->si->twoSided )
3931                 {
3932                         trace.twoSided = qtrue;
3933                         break;
3934                 }
3935         }
3936
3937         /* gather dirt */
3938         for( y = 0; y < lm->sh; y++ )
3939         {
3940                 for( x = 0; x < lm->sw; x++ )
3941                 {
3942                         /* get luxel */
3943                         cluster = SUPER_CLUSTER( x, y );
3944                         origin = SUPER_ORIGIN( x, y );
3945                         normal = SUPER_NORMAL( x, y );
3946                         floodlight = SUPER_FLOODLIGHT( x, y );
3947
3948                         /* set default dirt */
3949                         *floodlight = 0.0f;
3950
3951                         /* only look at mapped luxels */
3952                         if( *cluster < 0 )
3953                                 continue;
3954
3955                         /* copy to trace */
3956                         trace.cluster = *cluster;
3957                         VectorCopy( origin, trace.origin );
3958                         VectorCopy( normal, trace.normal );
3959
3960
3961
3962                         /* get dirt */
3963                         *floodlight = FloodLightForSample( &trace );
3964                 }
3965         }
3966
3967         /* testing no filtering */
3968         return;
3969
3970         /* filter "dirt" */
3971         for( y = 0; y < lm->sh; y++ )
3972         {
3973                 for( x = 0; x < lm->sw; x++ )
3974                 {
3975                         /* get luxel */
3976                         cluster = SUPER_CLUSTER( x, y );
3977                         floodlight = SUPER_FLOODLIGHT( x, y );
3978
3979                         /* filter dirt by adjacency to unmapped luxels */
3980                         average = *floodlight;
3981                         samples = 1.0f;
3982                         for( sy = (y - 1); sy <= (y + 1); sy++ )
3983                         {
3984                                 if( sy < 0 || sy >= lm->sh )
3985                                         continue;
3986
3987                                 for( sx = (x - 1); sx <= (x + 1); sx++ )
3988                                 {
3989                                         if( sx < 0 || sx >= lm->sw || (sx == x && sy == y) )
3990                                                 continue;
3991
3992                                         /* get neighboring luxel */
3993                                         cluster = SUPER_CLUSTER( sx, sy );
3994                                         floodlight2 = SUPER_FLOODLIGHT( sx, sy );
3995                                         if( *cluster < 0 || *floodlight2 <= 0.0f )
3996                                                 continue;
3997
3998                                         /* add it */
3999                                         average += *floodlight2;
4000                                         samples += 1.0f;
4001                                 }
4002
4003                                 /* bail */
4004                                 if( samples <= 0.0f )
4005                                         break;
4006                         }
4007
4008                         /* bail */
4009                         if( samples <= 0.0f )
4010                                 continue;
4011
4012                         /* scale dirt */
4013                         *floodlight = average / samples;
4014                 }
4015         }
4016 }
4017
4018 /*
4019 FloodLightForSample()
4020 calculates floodlight value for a given sample
4021 once again, kudos to the dirtmapping coder
4022 */
4023 float FloodLightForSample( trace_t *trace )
4024 {
4025         int             i;
4026         float   d;
4027         float   contribution;
4028         int     sub = 0;
4029         float   gatherLight, outLight;
4030         vec3_t  normal, worldUp, myUp, myRt, direction, displacement;
4031         float   dd;
4032         int     vecs = 0;
4033
4034         gatherLight=0;
4035         /* dummy check */
4036         //if( !dirty )
4037         //      return 1.0f;
4038         if( trace == NULL || trace->cluster < 0 )
4039                 return 0.0f;
4040
4041
4042         /* setup */
4043         dd = floodlightDistance;
4044         VectorCopy( trace->normal, normal );
4045
4046         /* check if the normal is aligned to the world-up */
4047         if( normal[ 0 ] == 0.0f && normal[ 1 ] == 0.0f )
4048         {
4049                 if( normal[ 2 ] == 1.0f )
4050                 {
4051                         VectorSet( myRt, 1.0f, 0.0f, 0.0f );
4052                         VectorSet( myUp, 0.0f, 1.0f, 0.0f );
4053                 }
4054                 else if( normal[ 2 ] == -1.0f )
4055                 {
4056                         VectorSet( myRt, -1.0f, 0.0f, 0.0f );
4057                         VectorSet( myUp,  0.0f, 1.0f, 0.0f );
4058                 }
4059         }
4060         else
4061         {
4062                 VectorSet( worldUp, 0.0f, 0.0f, 1.0f );
4063                 CrossProduct( normal, worldUp, myRt );
4064                 VectorNormalize( myRt, myRt );
4065                 CrossProduct( myRt, normal, myUp );
4066                 VectorNormalize( myUp, myUp );
4067         }
4068
4069         /* iterate through ordered vectors */
4070         for( i = 0; i < numFloodVectors; i++ )
4071         {
4072                 if (floodlight_lowquality==qtrue)
4073         {
4074                         if (rand()%10 != 0 ) continue;
4075                 }
4076
4077                 vecs++;
4078
4079                 /* transform vector into tangent space */
4080                 direction[ 0 ] = myRt[ 0 ] * floodVectors[ i ][ 0 ] + myUp[ 0 ] * floodVectors[ i ][ 1 ] + normal[ 0 ] * floodVectors[ i ][ 2 ];
4081                 direction[ 1 ] = myRt[ 1 ] * floodVectors[ i ][ 0 ] + myUp[ 1 ] * floodVectors[ i ][ 1 ] + normal[ 1 ] * floodVectors[ i ][ 2 ];
4082                 direction[ 2 ] = myRt[ 2 ] * floodVectors[ i ][ 0 ] + myUp[ 2 ] * floodVectors[ i ][ 1 ] + normal[ 2 ] * floodVectors[ i ][ 2 ];
4083
4084                 /* set endpoint */
4085                 VectorMA( trace->origin, dd, direction, trace->end );
4086
4087                 //VectorMA( trace->origin, 1, direction, trace->origin );
4088
4089                 SetupTrace( trace );
4090                 /* trace */
4091                 TraceLine( trace );
4092                 contribution=1;
4093
4094                 if (trace->compileFlags & C_SKY )
4095                 {
4096                         contribution=1.0f;
4097                 }
4098                 else if ( trace->opaque )
4099                 {
4100                         VectorSubtract( trace->hit, trace->origin, displacement );
4101                         d=VectorLength( displacement );
4102
4103                         // d=trace->distance;
4104                         //if (d>256) gatherDirt+=1;
4105                         contribution=d/dd;
4106                         if (contribution>1) contribution=1.0f;
4107
4108                         //gatherDirt += 1.0f - ooDepth * VectorLength( displacement );
4109                 }
4110
4111                 gatherLight+=contribution;
4112         }
4113
4114         /* early out */
4115         if( gatherLight <= 0.0f )
4116                 return 0.0f;
4117
4118         sub=vecs;
4119
4120         if (sub<1) sub=1;
4121         gatherLight/=(sub);
4122
4123         outLight=gatherLight;
4124         if( outLight > 1.0f )
4125                 outLight = 1.0f;
4126
4127         /* return to sender */
4128         return outLight;
4129 }
4130