Changeset 8349 in orxonox.OLD for branches/terrain/src/lib
- Timestamp:
- Jun 13, 2006, 7:41:37 PM (18 years ago)
- Location:
- branches/terrain/src/lib/graphics/importer/terrain
- Files:
-
- 3 edited
-
terrain.cc (modified) (5 diffs)
-
terrain_page.cc (modified) (6 diffs)
-
terrain_page.h (modified) (7 diffs)
Legend:
- Unmodified
- Added
- Removed
-
branches/terrain/src/lib/graphics/importer/terrain/terrain.cc
r8328 r8349 35 35 36 36 //TODO: Determine layer visibility! 37 printf( " creating terrain pages ( %d, %d )...", pagesX, pagesZ );37 printf( " * creating terrain pages ( %d, %d )...", pagesX, pagesZ ); 38 38 pages = new pTerrainPage[pagesX*pagesZ]; 39 39 for ( int x = 0; x < pagesX; ++x ) … … 41 41 pages[z*pagesX+x] = createPage( x, z ); 42 42 printf( "looks good\n" ); 43 printf( "creating quad_tree data structure..." ); 43 printf( " * inform pages about the adjacent pages..." ); 44 //Inform each page about its neighbors. 45 for ( int x = 0; x < pagesX; ++x ) 46 for ( int z = 0; z < pagesZ; ++z ) 47 pages[z*pagesX+x]->setNeighbors( 48 x > 0 ? getPage( x-1, z+0 ) : NULL, 49 x < pagesX-1 ? getPage( x+1, z+0 ) : NULL, 50 z > 0 ? getPage( x+0, z-1 ) : NULL, 51 z < pagesZ-1 ? getPage( x+0, z+1 ) : NULL ); 52 53 printf( "looks good\n" ); 54 printf( " * creating quad_tree data structure..." ); 44 55 root = createQuadTree( 0, 0, pagesX, pagesZ ); 45 56 activePages = NULL; … … 132 143 determineVisiblePages( root ); 133 144 134 int count = 0;135 145 page = activePages; 136 146 while ( page ) { … … 139 149 page = tmp->getNext(); 140 150 tmp->setVisibility( false ); 141 tmp->deactivate();142 deactivatedCount++;143 151 continue; 144 152 } 145 count++;146 153 page->updateTesselation(); 147 154 //Draw the page. TODO: It would be nice if all the pages with an LOD of 4 could be merged … … 150 157 page = page->getNext(); 151 158 } 152 //printf( "%d pages activated, %d pages deactivated\n", activatedCount, deactivatedCount );153 159 activatedCount = 0; deactivatedCount = 0; 154 float percentage = (float)cullCount/(float)(pagesX*pagesZ)*100.0f;160 //float percentage = (float)cullCount/(float)(pagesX*pagesZ)*100.0f; 155 161 //printf( "culled %f%% terrain pages away\n", percentage ); 156 162 } -
branches/terrain/src/lib/graphics/importer/terrain/terrain_page.cc
r8328 r8349 42 42 } 43 43 44 void TerrainPage::tesselateRow( int _z, int _xStride, int _zStride, bool _adaptLeft, bool _adaptRight ) 45 { 46 int xStart = 0, xEnd = owner->getPageSize(); 47 48 int halfStride = _zStride >> 1; 49 50 51 if ( _z ) { 52 addAgain( ); 53 addIndex( getIndex( 0, _z ) ); 54 } 55 if ( _adaptLeft ) { 56 assert( halfStride > 0 ); 57 addIndex( getIndex( 0, _z ) ); 58 addIndex( getIndex( 0, _z+halfStride ) ); 59 addIndex( getIndex( _xStride, _z ) ); 60 addIndex( getIndex( 0, _z+_zStride ) ); 61 addIndex( getIndex( _xStride, _z+_zStride ) ); 62 addAgain(); 63 xStart = _xStride; 64 } 65 66 if ( _adaptRight ) 67 xEnd-=_xStride; 68 69 for ( int x = xStart; x < xEnd; x+=_xStride ) { 70 addIndex( getIndex( x, _z) ); 71 addIndex( getIndex( x, _z+_zStride ) ); 72 } 73 74 int w = owner->getPageSize()-1; 75 76 if ( _adaptRight ) { 77 assert( halfStride > 0 ); 78 addIndex( getIndex( w-_xStride, _z ) ); 79 addAgain(); 80 addIndex( getIndex( w, _z ) ); 81 addIndex( getIndex( w-_xStride, _z+_zStride ) ); 82 addIndex( getIndex( w, _z+halfStride ) ); 83 addIndex( getIndex( w, _z+_zStride ) ); 84 } 85 } 86 87 //TODO: Perform benchmark to measure if the isVisible test should be included 88 //in this method. 89 90 void TerrainPage::determineBorderAdaption( bool _adapt[] ) 91 { 92 _adapt[0] = _adapt[1] = _adapt[2] = _adapt[3] = false; 93 94 if ( left && left->isVisible ) 95 _adapt[TP_LEFT] = ( wantedLOD - left->getWantedLOD() ) > 0; 96 97 if ( right && right->isVisible ) 98 _adapt[TP_RIGHT] = ( wantedLOD - right->getWantedLOD() ) > 0; 99 100 if ( top && top->isVisible) 101 _adapt[TP_TOP] = ( wantedLOD - top->getWantedLOD() ) > 0; 102 103 if ( bottom && bottom->isVisible ) 104 _adapt[TP_BOTTOM] = ( wantedLOD - bottom->getWantedLOD() ) > 0; 105 } 106 44 107 int TerrainPage::chooseLOD() 45 108 { … … 65 128 wantedLOD = TerrainPage::MAX_LODS-1; 66 129 } 67 // Calculate the tween factor. This is differently if the LOD is 0. 130 // Calculate the tween factor. The calculation is different if LOD is 0 131 // 68 132 if ( wantedLOD > 0 ) { 69 133 … … 82 146 if ( list ) 83 147 list->previous = this; 84 owner->incActivated();85 148 owner->setActiveList( this ); 86 149 } … … 99 162 owner->setActiveList( next ); 100 163 next = NULL; 101 owner->incDeactivated();102 164 previous = NULL; 103 165 … … 111 173 if( _lod!=0 ) 112 174 { 113 int pow= 1 << _lod, x0, y0, xi, yi;175 int stride = 1 << _lod, x0, y0, xi, yi; 114 176 // Altough these four nested loops look very scary, they're not 115 // that bad .116 for( y0 = 0 ; y0 < size- pow; y0 += pow) {117 for( x0 = 0; x0 < size- pow; x0 += pow) {118 for( yi = 1; yi < pow; yi++ ) {119 for( xi = 1; xi < pow; xi++ )177 // that bad and require only about O(n^2). 178 for( y0 = 0 ; y0 < size-stride; y0 += stride ) { 179 for( x0 = 0; x0 < size-stride; x0 += stride ) { 180 for( yi = 1; yi < stride; yi++ ) { 181 for( xi = 1; xi < stride; xi++ ) 120 182 { 121 183 int x = x0+xi, 122 184 y = y0+yi; 123 float fx0 = ( float )xi/( float ) pow, fx1 = 1.0f-fx0,124 fy0 = ( float )yi/( float ) pow, fy1 = 1.0f-fy0;185 float fx0 = ( float )xi/( float )stride, fx1 = 1.0f-fx0, 186 fy0 = ( float )yi/( float )stride, fy1 = 1.0f-fy0; 125 187 126 188 float height00 = getAltitude( x0, y0 ), 127 height10 = getAltitude( x0+ pow,y0 ),128 height01 = getAltitude( x0,y0+ pow),129 height11 = getAltitude( x0+ pow, y0+pow);189 height10 = getAltitude( x0+stride,y0 ), 190 height01 = getAltitude( x0,y0+stride ), 191 height11 = getAltitude( x0+stride, y0+stride ); 130 192 131 193 float paintHeight = fx1*fy1 * height00 + … … 179 241 } 180 242 243 bool TerrainPage::needsRetesselation() 244 { 245 246 bool leftChanged = ( left && left->isVisible ) && ( left->wantedLOD != left->currentLOD ), 247 rightChanged = ( right && right->isVisible ) && ( right->wantedLOD != right->currentLOD ), 248 topChanged = ( top && top->isVisible ) && ( top->wantedLOD != currentLOD ), 249 bottomChanged = ( bottom && bottom->isVisible ) && ( bottom->wantedLOD != bottom->currentLOD ), 250 iChanged = wantedLOD != currentLOD; 251 252 return ( leftChanged || rightChanged || topChanged || bottomChanged || forceTesselation || iChanged ); 253 } 254 181 255 void TerrainPage::updateTesselation( ) 182 256 { 257 258 if ( needsRetesselation() ) { 259 tesselate( wantedLOD ); 260 } 183 261 currentLOD = wantedLOD; 184 if ( forceTesselation || currentLOD != currentLOD ) {185 tesselate( currentLOD );186 }187 188 262 forceTesselation = false; 189 263 } 190 264 191 /** 192 * Genererates a tesselation for the given _lod. 193 */ 265 void TerrainPage::tesselateLevelFourPatch( bool _adapt[] ) 266 { 267 const int halfStride = 8, stride = 16; 268 269 enum { ADAPT_L = 1, ADAPT_R = 2, ADAPT_B = 4, ADAPT_T = 8, 270 ADAPT_LR = 3, ADAPT_LB = 5, ADAPT_LT = 9, ADAPT_RB = 6, 271 ADAPT_RT = 10, ADAPT_BT = 12, ADAPT_LRB = 7, ADAPT_LBT = 13, ADAPT_LRT = 11, 272 ADAPT_RBT = 14, ADAPT_LRBT = 15, ADAPT_NONE = 0 }; 273 274 int code = ( _adapt[TP_LEFT] ? ADAPT_L : 0 ) | 275 ( _adapt[TP_RIGHT] ? ADAPT_R : 0 ) | 276 ( _adapt[TP_BOTTOM] ? ADAPT_B : 0 ) | 277 ( _adapt[TP_TOP] ? ADAPT_T : 0 ); 278 switch( code ) { 279 case ADAPT_NONE: 280 addIndex( getIndex( 0, 0 ) ); 281 addIndex( getIndex( 0, stride ) ); 282 addIndex( getIndex( stride, 0 ) ); 283 addIndex( getIndex( stride, stride ) ); 284 break; 285 286 case ADAPT_L: 287 addIndex( getIndex( 0, 0 ) ); 288 addIndex( getIndex( 0, halfStride ) ); 289 addIndex( getIndex( stride, 0 ) ); 290 addIndex( getIndex( 0, stride ) ); 291 addIndex( getIndex( stride, stride ) ); 292 addAgain( ); 293 break; 294 295 case ADAPT_R: 296 addIndex( getIndex( stride, stride ) ); 297 addIndex( getIndex( stride, halfStride ) ); 298 addIndex( getIndex( 0, stride ) ); 299 addIndex( getIndex( stride, 0 ) ); 300 addIndex( getIndex( 0, 0 ) ); 301 addAgain( ); 302 break; 303 304 case ADAPT_LR: 305 addIndex( getIndex( 0, 0 ) ); 306 addIndex( getIndex( 0, halfStride ) ); 307 addIndex( getIndex( stride, 0 ) ); 308 addIndex( getIndex( 0, stride ) ); 309 addIndex( getIndex( stride, halfStride ) ); 310 addIndex( getIndex( stride, stride ) ); 311 break; 312 313 case ADAPT_B: 314 addIndex( getIndex( 0, 0 ) ); 315 addAgain( ); 316 addIndex( getIndex( halfStride, 0 ) ); 317 addIndex( getIndex( 0, stride ) ); 318 addIndex( getIndex( stride, 0 ) ); 319 addIndex( getIndex( stride, stride ) ); 320 break; 321 322 case ADAPT_LB: 323 addIndex( getIndex( 0, 0 ) ); 324 addIndex( getIndex( 0, halfStride ) ); 325 addIndex( getIndex( halfStride, 0 ) ); 326 addIndex( getIndex( 0, stride ) ); 327 addIndex( getIndex( stride, 0 ) ); 328 addIndex( getIndex( stride, stride ) ); 329 break; 330 331 case ADAPT_RB: 332 addIndex( getIndex( 0, 0 ) ); 333 addIndex( getIndex( 0, stride ) ); 334 addIndex( getIndex( halfStride, 0 ) ); 335 addIndex( getIndex( stride, 0 ) ); 336 addAgain( ); 337 addIndex( getIndex( 0, stride ) ); 338 addIndex( getIndex( stride, halfStride ) ); 339 addIndex( getIndex( stride, stride ) ); 340 break; 341 342 case ADAPT_LRB: 343 addIndex( getIndex( stride, stride ) ); 344 addIndex( getIndex( stride, halfStride ) ); 345 addIndex( getIndex( 0, stride ) ); 346 addIndex( getIndex( stride, 0 ) ); 347 addIndex( getIndex( 0, halfStride ) ); 348 addIndex( getIndex( halfStride, 0 ) ); 349 addIndex( getIndex( 0, 0 ) ); 350 addAgain( ); 351 break; 352 353 case ADAPT_T: 354 addIndex( getIndex( stride, stride ) ); 355 addAgain( ); 356 addIndex( getIndex( halfStride, stride ) ); 357 addIndex( getIndex( stride, 0 ) ); 358 addIndex( getIndex( 0, stride ) ); 359 addIndex( getIndex( 0, 0 ) ); 360 break; 361 362 case ADAPT_LT: 363 addIndex( getIndex( stride, stride ) ); 364 addIndex( getIndex( stride, 0 ) ); 365 addIndex( getIndex( halfStride, stride ) ); 366 addIndex( getIndex( 0, stride ) ); 367 addAgain( ); 368 addIndex( getIndex( stride, 0 ) ); 369 addIndex( getIndex( 0, halfStride ) ); 370 addIndex( getIndex( 0, 0 ) ); 371 break; 372 373 case ADAPT_RT: 374 addIndex( getIndex( stride, stride ) ); 375 addIndex( getIndex( stride, halfStride ) ); 376 addIndex( getIndex( halfStride, stride ) ); 377 addIndex( getIndex( stride, 0 ) ); 378 addIndex( getIndex( 0, stride ) ); 379 addIndex( getIndex( 0, 0 ) ); 380 break; 381 382 case ADAPT_LRT: 383 addIndex( getIndex( 0, 0 ) ); 384 addIndex( getIndex( 0, halfStride ) ); 385 addIndex( getIndex( stride, 0 ) ); 386 addIndex( getIndex( 0, stride ) ); 387 addIndex( getIndex( stride, halfStride ) ); 388 addIndex( getIndex( halfStride, stride ) ); 389 addIndex( getIndex( stride, stride ) ); 390 addAgain( ); 391 break; 392 393 case ADAPT_BT: 394 addIndex( getIndex( 0, 0 ) ); 395 addAgain( ); 396 addIndex( getIndex( halfStride, 0 ) ); 397 addIndex( getIndex( 0, stride ) ); 398 addIndex( getIndex( stride, 0 ) ); 399 addIndex( getIndex( halfStride, stride ) ); 400 addIndex( getIndex( stride, stride ) ); 401 addAgain( ); 402 break; 403 404 case ADAPT_LBT: 405 addIndex( getIndex( 0, 0 ) ); 406 addIndex( getIndex( 0, halfStride ) ); 407 addIndex( getIndex( halfStride, 0 ) ); 408 addIndex( getIndex( 0, stride ) ); 409 addIndex( getIndex( stride, 0 ) ); 410 addIndex( getIndex( halfStride, stride ) ); 411 addIndex( getIndex( stride, stride ) ); 412 addAgain( ); 413 break; 414 415 case ADAPT_RBT: 416 addIndex( getIndex( stride, stride ) ); 417 addIndex( getIndex( stride, halfStride ) ); 418 addIndex( getIndex( halfStride, stride ) ); 419 addIndex( getIndex( stride, 0 ) ); 420 addIndex( getIndex( 0, stride ) ); 421 addIndex( getIndex( halfStride, 0 ) ); 422 addIndex( getIndex( 0, 0 ) ); 423 addAgain( ); 424 break; 425 426 case ADAPT_LRBT: 427 addIndex( getIndex( 0, 0 ) ); 428 addIndex( getIndex( 0, halfStride ) ); 429 addIndex( getIndex( halfStride, 0 ) ); 430 addIndex( getIndex( 0, stride ) ); 431 addIndex( getIndex( stride, 0 ) ); 432 addIndex( getIndex( halfStride, stride ) ); 433 addIndex( getIndex( stride, halfStride ) ); 434 addIndex( getIndex( stride, stride ) ); 435 break; 436 } 437 } 438 439 194 440 void TerrainPage::tesselate( int _lod ) 195 441 { 442 196 443 int count = owner->getPageSize()*owner->getPageSize(); 444 197 445 memset( indexHash, 0xffff, 198 446 sizeof(unsigned short)*count ); 447 199 448 numVertices = 0; numIndices = 0; 200 449 201 assert( isVisible );202 450 //Calculate the pace, based on the lod. 203 451 int stride = 1 << _lod; 204 for ( int z = 0; z < owner->getPageSize()-stride; z+=stride ) { 205 if ( z > 0 ) { 206 //Connect the two rows together by inserting the last index of last row 207 //and the first index of the next row two times. This will produce two 208 //degenerate triangles. 209 addAgain( ); 210 addIndex( getIndex( 0, z ) ); 211 } 212 for ( int x = 0; x < owner->getPageSize(); x+=stride ) { 213 addIndex( getIndex( x, z ) ); 214 addIndex( getIndex( x, z+stride ) ); 215 } 216 } 452 453 bool adapt[4]; 454 determineBorderAdaption( adapt ); 455 assert( isVisible ); 456 if ( _lod == TerrainPage::MAX_LODS-1 ) { 457 tesselateLevelFourPatch( adapt ); 458 return; 459 } 460 461 int zStart = 0, zEnd = owner->getPageSize()-stride; 462 463 if ( adapt[TP_TOP] ) { 464 tesselateRow( 0, stride / 2, stride, adapt[TP_LEFT], adapt[TP_RIGHT] ); 465 zStart+= stride; 466 } 467 468 if ( adapt[TP_BOTTOM] ) 469 zEnd-= stride; 470 471 for ( int z = zStart; z < zEnd; z+=stride ) 472 tesselateRow( z, stride, stride, adapt[TP_LEFT], adapt[TP_RIGHT] ); 473 474 475 if ( !adapt[TP_BOTTOM] ) 476 return; 477 478 addAgain( ); 479 addIndex( getIndex( 0, owner->getPageSize()-1-stride ) ); 480 481 tesselateRow( owner->getPageSize()-1-stride, stride / 2, stride, adapt[TP_LEFT], adapt[TP_RIGHT] ); 482 217 483 } 218 484 -
branches/terrain/src/lib/graphics/importer/terrain/terrain_page.h
r8328 r8349 35 35 class TerrainPage : public TerrainQuad { 36 36 public: 37 enum { TP_LEFT = 0, TP_RIGHT = 1, TP_BOTTOM = 2, TP_TOP = 3 }; 37 38 const static int MAX_LODS = 5; 38 39 /** … … 112 113 * No geometry is updated in this method. You need to call 113 114 * updateTesselation() in order to see a change in geometry. This method is 114 * just a recommandation. 115 * just a recommondation for the LOD. It might be invalid due to outer 116 * constraints. 115 117 */ 116 118 int chooseLOD(); … … 140 142 */ 141 143 bool cull( ); 142 144 145 bool needsRetesselation(); 143 146 /** 144 147 * Sets the neighbors of this terrain page. pass null if a neighbor if this … … 160 163 position.z = _pos.z; 161 164 } 165 166 pTerrainPage getLeft() { return left; } 167 pTerrainPage getRight() { return right; } 168 pTerrainPage getBottom() { return bottom; } 169 pTerrainPage getTop() { return top; } 162 170 163 171 /** … … 175 183 */ 176 184 inline pTerrainPage getPrevious() { return previous; } 177 185 inline int getCurrentLOD() { return currentLOD; } 178 186 /** 179 187 * @return Returns the wanted LOD. Make sure you call this method after a call to … … 194 202 protected: 195 203 196 204 /** 205 * @brief Tesselates one row of the terrain page. 206 * @param _z The z-offset of the row 207 * @param _xStride Determines the step-size horizontally 208 * @param _zStride Determines the step-size vertically. 209 * @param _adaptRight True if the right neighbor has a coarser 210 * tesselation level. 211 * @param _adaptLeft True if the left neighbor has a coarser 212 * tesselation level. 213 */ 214 void tesselateRow( int _z, int _xStride, int _zStride, bool _adaptLeft, bool _adaptRight ); 215 216 /** 217 * @brief Returns four boolean values in the oder 218 */ 219 void determineBorderAdaption( bool _adapt[] ); 220 221 /** 222 * @brief Adds the given index to the index-array 223 */ 197 224 inline void addIndex( unsigned short _index ); 198 225 226 /** 227 * @brief We programmers are very lazy :) This method just adds the last added index 228 * again. 229 */ 199 230 inline void addAgain(); 200 231 232 201 233 void getCoord( int _x, int _z, TexCoord& _coord) const; 234 202 235 /** 203 236 * Fills _vertex with the vertex information at index. … … 205 238 void getVertex( int _x, int _z, Triple& _vertex ) const; 206 239 207 /**208 * Use this method to safely get a vertex at location ( _x, _z ). If it wasn't209 * created before, this method does that for you.210 */240 /** 241 * Use this method to safely get a vertex at location ( _x, _z ). If it wasn't 242 * created before, this method does that for you. 243 */ 211 244 short getIndex( int _x, int _z ); 212 245 void tesselateLevelFourPatch( bool _adapt[] ); 213 246 /** 214 247 * Generates the tesselation for the given level of detail.
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