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1 | // Created on: 2013-12-20 |
| 2 | // Created by: Denis BOGOLEPOV |
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3 | // Copyright (c) 2013-2014 OPEN CASCADE SAS |
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4 | // |
| 5 | // This file is part of Open CASCADE Technology software library. |
| 6 | // |
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7 | // This library is free software; you can redistribute it and/or modify it under |
| 8 | // the terms of the GNU Lesser General Public License version 2.1 as published |
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9 | // by the Free Software Foundation, with special exception defined in the file |
| 10 | // OCCT_LGPL_EXCEPTION.txt. Consult the file LICENSE_LGPL_21.txt included in OCCT |
| 11 | // distribution for complete text of the license and disclaimer of any warranty. |
| 12 | // |
| 13 | // Alternatively, this file may be used under the terms of Open CASCADE |
| 14 | // commercial license or contractual agreement. |
| 15 | |
| 16 | #ifndef _BVH_BinnedBuilder_Header |
| 17 | #define _BVH_BinnedBuilder_Header |
| 18 | |
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19 | #include <BVH_QueueBuilder.hxx> |
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20 | |
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21 | #include <algorithm> |
| 22 | |
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23 | //! Stores parameters of single node bin (slice of AABB). |
| 24 | template<class T, int N> |
| 25 | struct BVH_Bin |
| 26 | { |
| 27 | //! Creates new node bin. |
| 28 | BVH_Bin() : Count (0) {} |
| 29 | |
| 30 | Standard_Integer Count; //!< Number of primitives in the bin |
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31 | BVH_Box<T, N> Box; //!< AABB of primitives in the bin |
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32 | }; |
| 33 | |
| 34 | //! Performs building of BVH tree using binned SAH algorithm. |
| 35 | //! Number of Bins controls tree's quality (greater - better) in cost of construction time. |
| 36 | template<class T, int N, int Bins = 32> |
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37 | class BVH_BinnedBuilder : public BVH_QueueBuilder<T, N> |
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38 | { |
| 39 | public: |
| 40 | |
| 41 | //! Type for the array of bins of BVH tree node. |
| 42 | typedef BVH_Bin<T, N> BVH_BinVector[Bins]; |
| 43 | |
| 44 | public: |
| 45 | |
| 46 | //! Creates binned SAH BVH builder. |
| 47 | BVH_BinnedBuilder (const Standard_Integer theLeafNodeSize = 5, |
| 48 | const Standard_Integer theMaxTreeDepth = 32); |
| 49 | |
| 50 | //! Releases resources of binned SAH BVH builder. |
| 51 | virtual ~BVH_BinnedBuilder(); |
| 52 | |
| 53 | protected: |
| 54 | |
| 55 | //! Builds BVH node for specified task info. |
| 56 | virtual void BuildNode (BVH_Set<T, N>* theSet, |
| 57 | BVH_Tree<T, N>* theBVH, |
| 58 | const Standard_Integer theNode); |
| 59 | |
| 60 | //! Arranges node primitives into bins. |
| 61 | virtual void GetSubVolumes (BVH_Set<T, N>* theSet, |
| 62 | BVH_Tree<T, N>* theBVH, |
| 63 | const Standard_Integer theNode, |
| 64 | BVH_BinVector& theBins, |
| 65 | const Standard_Integer theAxis); |
| 66 | |
| 67 | }; |
| 68 | |
| 69 | #include <BVH_BinnedBuilder.lxx> |
| 70 | |
| 71 | #endif // _BVH_BinnedBuilder_Header |
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