CrystalSpace

Public API Reference

csgeom/bsptree.h

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00001 /*
00002     Copyright (C) 2004 by Jorrit Tyberghein
00003 
00004     This library is free software; you can redistribute it and/or
00005     modify it under the terms of the GNU Library General Public
00006     License as published by the Free Software Foundation; either
00007     version 2 of the License, or (at your option) any later version.
00008 
00009     This library is distributed in the hope that it will be useful,
00010     but WITHOUT ANY WARRANTY; without even the implied warranty of
00011     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
00012     Library General Public License for more details.
00013 
00014     You should have received a copy of the GNU Library General Public
00015     License along with this library; if not, write to the Free
00016     Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
00017 */
00018 
00019 #ifndef __CS_CSGEOM_BSPTREE_H__
00020 #define __CS_CSGEOM_BSPTREE_H__
00021 
00022 #include "csextern.h"
00023 
00024 #include "csgeom/plane3.h"
00025 #include "csutil/array.h"
00026 #include "csutil/blockallocator.h"
00027 #include "csutil/dirtyaccessarray.h"
00028 
00035 struct iGraphics3D;
00036 
00037 template<class T>
00038 class csSet;
00039 struct csTriangle;
00040 
00046 class CS_CRYSTALSPACE_EXPORT csBSPTree
00047 {
00048 private:
00049   static csBlockAllocator<csBSPTree> tree_nodes;
00050   static csDirtyAccessArray<int> b2f_array;
00051 
00052   csBSPTree* child1;            // If child1 is not 0 then child2 will
00053   csBSPTree* child2;            // also be not 0.
00054 
00055   csPlane3 split_plane;
00056   csArray<int> splitters;
00057 
00058   size_t FindBestSplitter (csTriangle* triangles, csPlane3* planes,
00059         int num_triangles, csVector3* vertices,
00060         const csArray<int>& triidx);
00061   void Build (csTriangle* triangles, csPlane3* planes,
00062         int num_triangles, csVector3* vertices,
00063         const csArray<int>& triidx);
00064   void Back2Front (const csVector3& pos, csDirtyAccessArray<int>& arr,
00065         csSet<int>& used_indices);
00066 public:
00068   csBSPTree ();
00070   ~csBSPTree ();
00071 
00073   void Clear ();
00074 
00078   void Build (csTriangle* triangles, int num_triangles,
00079         csVector3* vertices);
00080 
00086   const csDirtyAccessArray<int>& Back2Front (const csVector3& pos);
00087 };
00088 
00091 #endif // __CS_CSGEOM_BSPTREE_H__
00092 

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