tools/quake3/q3map2/writebsp.c

   1 /*
   2 Copyright (C) 1999-2007 id Software, Inc. and contributors.
   3 For a list of contributors, see the accompanying CONTRIBUTORS file.
   4
   5 This file is part of GtkRadiant.
   6
   7 GtkRadiant is free software; you can redistribute it and/or modify
   8 it under the terms of the GNU General Public License as published by
   9 the Free Software Foundation; either version 2 of the License, or
  10 (at your option) any later version.
  11
  12 GtkRadiant is distributed in the hope that it will be useful,
  13 but WITHOUT ANY WARRANTY; without even the implied warranty of
  14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15 GNU General Public License for more details.
  16
  17 You should have received a copy of the GNU General Public License
  18 along with GtkRadiant; if not, write to the Free Software
  19 Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
  20
  21 ----------------------------------------------------------------------------------
  22
  23 This code has been altered significantly from its original form, to support
  24 several games based on the Quake III Arena engine, in the form of "Q3Map2."
  25
  26 ------------------------------------------------------------------------------- */
  27
  28
  29
  30 /* marker */
  31 #define WRITEBSP_C
  32
  33
  34
  35 /* dependencies */
  36 #include "q3map2.h"
  37
  38
  39
  40 /*
  41 EmitShader()
  42 emits a bsp shader entry
  43 */
  44
  45 int     EmitShader( const char *shader, int *contentFlags, int *surfaceFlags )
  46 {
  47         int                             i;
  48         shaderInfo_t    *si;
  49
  50
  51         /* handle special cases */
  52         if( shader == NULL )
  53                 shader = "noshader";
  54
  55         /* try to find an existing shader */
  56         for( i = 0; i < numBSPShaders; i++ )
  57         {
  58                 /* ydnar: handle custom surface/content flags */
  59                 if( surfaceFlags != NULL && bspShaders[ i ].surfaceFlags != *surfaceFlags )
  60                         continue;
  61                 if( contentFlags != NULL && bspShaders[ i ].contentFlags != *contentFlags )
  62                         continue;
  63
  64                 /* compare name */
  65                 if( !Q_stricmp( shader, bspShaders[ i ].shader ) )
  66                         return i;
  67         }
  68
  69         /* get shaderinfo */
  70         si = ShaderInfoForShader( shader );
  71
  72         /* emit a new shader */
  73         if( i == MAX_MAP_SHADERS )
  74                 Error( "MAX_MAP_SHADERS" );
  75         numBSPShaders++;
  76         strcpy( bspShaders[ i ].shader, shader );
  77         bspShaders[ i ].surfaceFlags = si->surfaceFlags;
  78         bspShaders[ i ].contentFlags = si->contentFlags;
  79
  80         /* handle custom content/surface flags */
  81         if( surfaceFlags != NULL )
  82                 bspShaders[ i ].surfaceFlags = *surfaceFlags;
  83         if( contentFlags != NULL )
  84                 bspShaders[ i ].contentFlags = *contentFlags;
  85
  86         /* recursively emit any damage shaders */
  87         if( si->damageShader[ 0 ] != '\0' )
  88         {
  89                 Sys_FPrintf( SYS_VRB, "Shader %s has damage shader %s\n", si->shader, si->damageShader );
  90                 EmitShader( si->damageShader, NULL, NULL );
  91         }
  92
  93         /* return it */
  94         return i;
  95 }
  96
  97
  98
  99 /*
 100 EmitPlanes()
 101 there is no oportunity to discard planes, because all of the original
 102 brushes will be saved in the map
 103 */
 104
 105 void EmitPlanes( void )
 106 {
 107         int                     i;
 108         bspPlane_t      *bp;
 109         plane_t         *mp;
 110
 111
 112         /* walk plane list */
 113         mp = mapplanes;
 114         for( i = 0; i < nummapplanes; i++, mp++ )
 115         {
 116                 bp = &bspPlanes[ numBSPPlanes ];
 117                 VectorCopy( mp->normal, bp->normal );
 118                 bp->dist = mp->dist;
 119                 numBSPPlanes++;
 120         }
 121
 122         /* emit some statistics */
 123         Sys_FPrintf( SYS_VRB, "%9d BSP planes\n", numBSPPlanes );
 124 }
 125
 126
 127
 128 /*
 129 EmitLeaf()
 130 emits a leafnode to the bsp file
 131 */
 132
 133 void EmitLeaf( node_t *node )
 134 {
 135         bspLeaf_t               *leaf_p;
 136         brush_t                 *b;
 137         drawSurfRef_t   *dsr;
 138         int                             i = 0;
 139
 140
 141         /* check limits */
 142         if( numBSPLeafs >= MAX_MAP_LEAFS )
 143                 Error( "MAX_MAP_LEAFS" );
 144
 145         leaf_p = &bspLeafs[numBSPLeafs];
 146         numBSPLeafs++;
 147
 148         leaf_p->cluster = node->cluster;
 149         leaf_p->area = node->area;
 150
 151         /* emit bounding box */
 152         VectorCopy( node->mins, leaf_p->mins );
 153         VectorCopy( node->maxs, leaf_p->maxs );
 154
 155         /* emit leaf brushes */
 156         leaf_p->firstBSPLeafBrush = numBSPLeafBrushes;
 157         for( b = node->brushlist; b; b = b->next )
 158         {
 159                 /* something is corrupting brushes */
 160                 if( (int) b < 256 )
 161                 {
 162                         Sys_Printf( "WARNING: Node brush list corrupted (0x%08X)\n", b );
 163                         break;
 164                 }
 165                 //%     if( b->guard != 0xDEADBEEF )
 166                 //%             Sys_Printf( "Brush %6d: 0x%08X Guard: 0x%08X Next: 0x%08X Original: 0x%08X Sides: %d\n", b->brushNum, b, b, b->next, b->original, b->numsides );
 167
 168                 if( numBSPLeafBrushes >= MAX_MAP_LEAFBRUSHES )
 169                         Error( "MAX_MAP_LEAFBRUSHES" );
 170                 bspLeafBrushes[ numBSPLeafBrushes ] = b->original->outputNum;
 171                 numBSPLeafBrushes++;
 172         }
 173
 174         leaf_p->numBSPLeafBrushes = numBSPLeafBrushes - leaf_p->firstBSPLeafBrush;
 175
 176         /* emit leaf surfaces */
 177         if( node->opaque )
 178                 return;
 179
 180         /* add the drawSurfRef_t drawsurfs */
 181         leaf_p->firstBSPLeafSurface = numBSPLeafSurfaces;
 182         for ( dsr = node->drawSurfReferences; dsr; dsr = dsr->nextRef )
 183         {
 184                 if( numBSPLeafSurfaces >= MAX_MAP_LEAFFACES )
 185                         Error( "MAX_MAP_LEAFFACES" );
 186                 bspLeafSurfaces[ numBSPLeafSurfaces ] = dsr->outputNum;
 187                 numBSPLeafSurfaces++;
 188         }
 189
 190         leaf_p->numBSPLeafSurfaces = numBSPLeafSurfaces - leaf_p->firstBSPLeafSurface;
 191 }
 192
 193
 194 /*
 195 EmitDrawNode_r()
 196 recursively emit the bsp nodes
 197 */
 198
 199 int EmitDrawNode_r( node_t *node )
 200 {
 201         bspNode_t       *n;
 202         int                     i;
 203
 204
 205         /* check for leafnode */
 206         if( node->planenum == PLANENUM_LEAF )
 207         {
 208                 EmitLeaf( node );
 209                 return -numBSPLeafs;
 210         }
 211
 212         /* emit a node */
 213         if( numBSPNodes == MAX_MAP_NODES )
 214                 Error( "MAX_MAP_NODES" );
 215         n = &bspNodes[ numBSPNodes ];
 216         numBSPNodes++;
 217
 218         VectorCopy (node->mins, n->mins);
 219         VectorCopy (node->maxs, n->maxs);
 220
 221         if (node->planenum & 1)
 222                 Error ("WriteDrawNodes_r: odd planenum");
 223         n->planeNum = node->planenum;
 224
 225         //
 226         // recursively output the other nodes
 227         //
 228         for (i=0 ; i<2 ; i++)
 229         {
 230                 if (node->children[i]->planenum == PLANENUM_LEAF)
 231                 {
 232                         n->children[i] = -(numBSPLeafs + 1);
 233                         EmitLeaf (node->children[i]);
 234                 }
 235                 else
 236                 {
 237                         n->children[i] = numBSPNodes;
 238                         EmitDrawNode_r (node->children[i]);
 239                 }
 240         }
 241
 242         return n - bspNodes;
 243 }
 244
 245
 246
 247 /*
 248 ============
 249 SetModelNumbers
 250 ============
 251 */
 252 void SetModelNumbers (void)
 253 {
 254         int             i;
 255         int             models;
 256         char    value[10];
 257
 258         models = 1;
 259         for ( i=1 ; i<numEntities ; i++ ) {
 260                 if ( entities[i].brushes || entities[i].patches ) {
 261                         sprintf ( value, "*%i", models );
 262                         models++;
 263                         SetKeyValue (&entities[i], "model", value);
 264                 }
 265         }
 266
 267 }
 268
 269
 270
 271
 272 /*
 273 SetLightStyles()
 274 sets style keys for entity lights
 275 */
 276
 277 void SetLightStyles( void )
 278 {
 279         int                     i, j, style, numStyles;
 280         qboolean        keepLights;
 281         const char      *t;
 282         entity_t        *e;
 283         epair_t         *ep, *next;
 284         char            value[ 10 ];
 285         char            lightTargets[ MAX_SWITCHED_LIGHTS ][ 64 ];
 286         int                     lightStyles[ MAX_SWITCHED_LIGHTS ];
 287
 288
 289         /* ydnar: determine if we keep lights in the bsp */
 290         t = ValueForKey( &entities[ 0 ], "_keepLights" );
 291         keepLights = (t[ 0 ] == '1') ? qtrue : qfalse;
 292
 293         /* any light that is controlled (has a targetname) must have a unique style number generated for it */
 294         numStyles = 0;
 295         for( i = 1; i < numEntities; i++ )
 296         {
 297                 e = &entities[ i ];
 298
 299                 t = ValueForKey( e, "classname" );
 300                 if( Q_strncasecmp( t, "light", 5 ) )
 301                         continue;
 302                 t = ValueForKey( e, "targetname" );
 303                 if( t[ 0 ] == '\0' )
 304                 {
 305                         /* ydnar: strip the light from the BSP file */
 306                         if( keepLights == qfalse )
 307                         {
 308                                 ep = e->epairs;
 309                                 while( ep != NULL )
 310                                 {
 311                                         next = ep->next;
 312                                         free( ep->key );
 313                                         free( ep->value );
 314                                         free( ep );
 315                                         ep = next;
 316                                 }
 317                                 e->epairs = NULL;
 318                                 numStrippedLights++;
 319                         }
 320
 321                         /* next light */
 322                         continue;
 323                 }
 324
 325                 /* get existing style */
 326                 style = IntForKey( e, "style" );
 327                 if( style < LS_NORMAL || style > LS_NONE )
 328                         Error( "Invalid lightstyle (%d) on entity %d", style, i );
 329
 330                 /* find this targetname */
 331                 for( j = 0; j < numStyles; j++ )
 332                         if( lightStyles[ j ] == style && !strcmp( lightTargets[ j ], t ) )
 333                                 break;
 334
 335                 /* add a new style */
 336                 if( j >= numStyles )
 337                 {
 338                         if( numStyles == MAX_SWITCHED_LIGHTS )
 339                                 Error( "MAX_SWITCHED_LIGHTS (%d) exceeded, reduce the number of lights with targetnames", MAX_SWITCHED_LIGHTS );
 340                         strcpy( lightTargets[ j ], t );
 341                         lightStyles[ j ] = style;
 342                         numStyles++;
 343                 }
 344
 345                 /* set explicit style */
 346                 sprintf( value, "%d", 32 + j );
 347                 SetKeyValue( e, "style", value );
 348
 349                 /* set old style */
 350                 if( style != LS_NORMAL )
 351                 {
 352                         sprintf( value, "%d", style );
 353                         SetKeyValue( e, "switch_style", value );
 354                 }
 355         }
 356
 357         /* emit some statistics */
 358         Sys_FPrintf( SYS_VRB, "%9d light entities stripped\n", numStrippedLights );
 359 }
 360
 361
 362
 363 /*
 364 BeginBSPFile()
 365 starts a new bsp file
 366 */
 367
 368 void BeginBSPFile( void )
 369 {
 370         /* these values may actually be initialized if the file existed when loaded, so clear them explicitly */
 371         numBSPModels = 0;
 372         numBSPNodes = 0;
 373         numBSPBrushSides = 0;
 374         numBSPLeafSurfaces = 0;
 375         numBSPLeafBrushes = 0;
 376
 377         /* leave leaf 0 as an error, because leafs are referenced as negative number nodes */
 378         numBSPLeafs = 1;
 379
 380
 381         /* ydnar: gs mods: set the first 6 drawindexes to 0 1 2 2 1 3 for triangles and quads */
 382         numBSPDrawIndexes = 6;
 383         bspDrawIndexes[ 0 ] = 0;
 384         bspDrawIndexes[ 1 ] = 1;
 385         bspDrawIndexes[ 2 ] = 2;
 386         bspDrawIndexes[ 3 ] = 0;
 387         bspDrawIndexes[ 4 ] = 2;
 388         bspDrawIndexes[ 5 ] = 3;
 389 }
 390
 391
 392
 393 /*
 394 EndBSPFile()
 395 finishes a new bsp and writes to disk
 396 */
 397
 398 void EndBSPFile( void )
 399 {
 400         char    path[ 1024 ];
 401
 402
 403         EmitPlanes();
 404
 405         numBSPEntities = numEntities;
 406         UnparseEntities();
 407
 408         /* write the surface extra file */
 409         WriteSurfaceExtraFile( source );
 410
 411         /* write the bsp */
 412         sprintf( path, "%s.bsp", source );
 413         Sys_Printf( "Writing %s\n", path );
 414         WriteBSPFile( path );
 415 }
 416
 417
 418
 419 /*
 420 EmitBrushes()
 421 writes the brush list to the bsp
 422 */
 423
 424 void EmitBrushes( brush_t *brushes, int *firstBrush, int *numBrushes )
 425 {
 426         int                             j;
 427         brush_t                 *b;
 428         bspBrush_t              *db;
 429         bspBrushSide_t  *cp;
 430
 431
 432         /* set initial brush */
 433         if( firstBrush != NULL )
 434                 *firstBrush = numBSPBrushes;
 435         if( numBrushes != NULL )
 436                 *numBrushes = 0;
 437
 438         /* walk list of brushes */
 439         for( b = brushes; b != NULL; b = b->next )
 440         {
 441                 /* check limits */
 442                 if( numBSPBrushes == MAX_MAP_BRUSHES )
 443                         Error( "MAX_MAP_BRUSHES (%d)", numBSPBrushes );
 444
 445                 /* get bsp brush */
 446                 b->outputNum = numBSPBrushes;
 447                 db = &bspBrushes[ numBSPBrushes ];
 448                 numBSPBrushes++;
 449                 if( numBrushes != NULL )
 450                         (*numBrushes)++;
 451
 452                 db->shaderNum = EmitShader( b->contentShader->shader, &b->contentShader->contentFlags, &b->contentShader->surfaceFlags );
 453                 db->firstSide = numBSPBrushSides;
 454
 455                 /* walk sides */
 456                 db->numSides = 0;
 457                 for( j = 0; j < b->numsides; j++ )
 458                 {
 459                         /* set output number to bogus initially */
 460                         b->sides[ j ].outputNum = -1;
 461
 462                         /* don't emit generated backSide sides */
 463                         if ( b->sides[ j ].backSide )
 464                                 continue;
 465
 466                         /* check count */
 467                         if( numBSPBrushSides == MAX_MAP_BRUSHSIDES )
 468                                 Error( "MAX_MAP_BRUSHSIDES ");
 469
 470                         /* emit side */
 471                         b->sides[ j ].outputNum = numBSPBrushSides;
 472                         cp = &bspBrushSides[ numBSPBrushSides ];
 473                         db->numSides++;
 474                         numBSPBrushSides++;
 475                         cp->planeNum = b->sides[ j ].planenum;
 476
 477                         /* emit shader */
 478                         if( b->sides[ j ].shaderInfo )
 479                                 cp->shaderNum = EmitShader( b->sides[ j ].shaderInfo->shader, &b->sides[ j ].shaderInfo->contentFlags, &b->sides[ j ].shaderInfo->surfaceFlags );
 480                         else
 481                                 cp->shaderNum = EmitShader( NULL, NULL, NULL );
 482                 }
 483         }
 484 }
 485
 486
 487
 488 /*
 489 EmitFogs() - ydnar
 490 turns map fogs into bsp fogs
 491 */
 492
 493 void EmitFogs( void )
 494 {
 495         int                     i, j;
 496
 497
 498         /* setup */
 499         numBSPFogs = numMapFogs;
 500
 501         /* walk list */
 502         for( i = 0; i < numMapFogs; i++ )
 503         {
 504                 /* set shader */
 505                 strcpy( bspFogs[ i ].shader, mapFogs[ i ].si->shader );
 506
 507                 /* global fog doesn't have an associated brush */
 508                 if( mapFogs[ i ].brush == NULL )
 509                 {
 510                         bspFogs[ i ].brushNum = -1;
 511                         bspFogs[ i ].visibleSide = -1;
 512                 }
 513                 else
 514                 {
 515                         /* set brush */
 516                         bspFogs[ i ].brushNum = mapFogs[ i ].brush->outputNum;
 517
 518                         /* try to use forced visible side */
 519                         if( mapFogs[ i ].visibleSide >= 0 )
 520                         {
 521                                 bspFogs[ i ].visibleSide = mapFogs[ i ].visibleSide;
 522                                 continue;
 523                         }
 524
 525                         /* find visible side */
 526                         for( j = 0; j < 6; j++ )
 527                         {
 528                                 if( mapFogs[ i ].brush->sides[ j ].visibleHull != NULL )
 529                                 {
 530                                         Sys_Printf( "Fog %d has visible side %d\n", i, j );
 531                                         bspFogs[ i ].visibleSide = j;
 532                                         break;
 533                                 }
 534                         }
 535                 }
 536         }
 537 }
 538
 539
 540
 541 /*
 542 BeginModel()
 543 sets up a new brush model
 544 */
 545
 546 void BeginModel( void )
 547 {
 548         bspModel_t      *mod;
 549         brush_t         *b;
 550         entity_t        *e;
 551         vec3_t          mins, maxs;
 552         vec3_t          lgMins, lgMaxs;         /* ydnar: lightgrid mins/maxs */
 553         parseMesh_t     *p;
 554         int                     i;
 555
 556
 557         /* test limits */
 558         if( numBSPModels == MAX_MAP_MODELS )
 559                 Error( "MAX_MAP_MODELS" );
 560
 561         /* get model and entity */
 562         mod = &bspModels[ numBSPModels ];
 563         e = &entities[ mapEntityNum ];
 564
 565         /* ydnar: lightgrid mins/maxs */
 566         ClearBounds( lgMins, lgMaxs );
 567
 568         /* bound the brushes */
 569         ClearBounds( mins, maxs );
 570         for ( b = e->brushes; b; b = b->next )
 571         {
 572                 /* ignore non-real brushes (origin, etc) */
 573                 if( b->numsides == 0 )
 574                         continue;
 575                 AddPointToBounds( b->mins, mins, maxs );
 576                 AddPointToBounds( b->maxs, mins, maxs );
 577
 578                 /* ydnar: lightgrid bounds */
 579                 if( b->compileFlags & C_LIGHTGRID )
 580                 {
 581                         AddPointToBounds( b->mins, lgMins, lgMaxs );
 582                         AddPointToBounds( b->maxs, lgMins, lgMaxs );
 583                 }
 584         }
 585
 586         /* bound patches */
 587         for( p = e->patches; p; p = p->next )
 588         {
 589                 for( i = 0; i < (p->mesh.width * p->mesh.height); i++ )
 590                         AddPointToBounds( p->mesh.verts[i].xyz, mins, maxs );
 591         }
 592
 593         /* ydnar: lightgrid mins/maxs */
 594         if( lgMins[ 0 ] < 99999 )
 595         {
 596                 /* use lightgrid bounds */
 597                 VectorCopy( lgMins, mod->mins );
 598                 VectorCopy( lgMaxs, mod->maxs );
 599         }
 600         else
 601         {
 602                 /* use brush/patch bounds */
 603                 VectorCopy( mins, mod->mins );
 604                 VectorCopy( maxs, mod->maxs );
 605         }
 606
 607         /* note size */
 608         Sys_FPrintf( SYS_VRB, "BSP bounds: { %f %f %f } { %f %f %f }\n", mins[ 0 ], mins[ 1 ], mins[ 2 ], maxs[ 0 ], maxs[ 1 ], maxs[ 2 ] );
 609         Sys_FPrintf( SYS_VRB, "Lightgrid bounds: { %f %f %f } { %f %f %f }\n", lgMins[ 0 ], lgMins[ 1 ], lgMins[ 2 ], lgMaxs[ 0 ], lgMaxs[ 1 ], lgMaxs[ 2 ] );
 610
 611         /* set firsts */
 612         mod->firstBSPSurface = numBSPDrawSurfaces;
 613         mod->firstBSPBrush = numBSPBrushes;
 614 }
 615
 616
 617
 618
 619 /*
 620 EndModel()
 621 finish a model's processing
 622 */
 623
 624 void EndModel( entity_t *e, node_t *headnode )
 625 {
 626         bspModel_t      *mod;
 627
 628
 629         /* note it */
 630         Sys_FPrintf( SYS_VRB, "--- EndModel ---\n" );
 631
 632         /* emit the bsp */
 633         mod = &bspModels[ numBSPModels ];
 634         EmitDrawNode_r( headnode );
 635
 636         /* set surfaces and brushes */
 637         mod->numBSPSurfaces = numBSPDrawSurfaces - mod->firstBSPSurface;
 638         mod->firstBSPBrush = e->firstBrush;
 639         mod->numBSPBrushes = e->numBrushes;
 640
 641         /* increment model count */
 642         numBSPModels++;
 643 }
 644
 645
 646