nevrax.org : docs

00001 
00007 /* Copyright, 2001 Nevrax Ltd.
00008  *
00009  * This file is part of NEVRAX NEL.
00010  * NEVRAX NEL is free software; you can redistribute it and/or modify
00011  * it under the terms of the GNU General Public License as published by
00012  * the Free Software Foundation; either version 2, or (at your option)
00013  * any later version.
00014 
00015  * NEVRAX NEL is distributed in the hope that it will be useful, but
00016  * WITHOUT ANY WARRANTY; without even the implied warranty of
00017  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
00018  * General Public License for more details.
00019 
00020  * You should have received a copy of the GNU General Public License
00021  * along with NEVRAX NEL; see the file COPYING. If not, write to the
00022  * Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston,
00023  * MA 02111-1307, USA.
00024  */
00025 
00026 #ifndef NL_LANDSCAPE_COLLISION_GRID_H
00027 #define NL_LANDSCAPE_COLLISION_GRID_H
00028 
00029 #include "nel/misc/types_nl.h"
00030 #include "3d/patch.h"
00031 #include "3d/visual_collision_manager.h"
00032 #include <vector>
00033 
00034 
00035 namespace NL3D 
00036 {
00037 
00038 
00039 class   CVisualCollisionManager;
00040 
00041 
00042 // must be a power of 2.
00043 #define NL_COLGRID_SIZE 32                                                                      // Size of the grid.
00044 // NB: for speedup, one elt is always size of 2 meters.
00045 
00046 
00047 // ***************************************************************************
00055 class CLandscapeCollisionGrid
00056 {
00057 public:
00058 
00060         CLandscapeCollisionGrid(CVisualCollisionManager *owner);
00061         ~CLandscapeCollisionGrid();
00062 
00063 
00065         void                    clear();
00069         void                    build(const std::vector<CPatchQuadBlock*> &quadBlocks, const CVector &delta);
00070 
00071 
00073         CVisualTileDescNode                     *select(const NLMISC::CVector &pos);
00074 
00075 
00076 // ***********************
00077 private:
00078         CVisualCollisionManager         *_Owner;
00079 
00080 
00082         bool                                            _Cleared;
00083         CVisualTileDescNode                     *_Grid[NL_COLGRID_SIZE*NL_COLGRID_SIZE];
00084         uint                                            _SizePower;
00085         CVector                                         _Delta;
00086 
00087 
00088 private:
00089         void                    addQuadToGrid(uint16 paBlockId, uint16 quadId, sint minx, sint maxx, sint miny, sint maxy);
00090 
00091 
00092 };
00093 
00094 
00095 } // NL3D
00096 
00097 
00098 #endif // NL_LANDSCAPE_COLLISION_GRID_H
00099 
00100 /* End of landscape_collision_grid.h */