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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_Builder_Header |
| 17 | #define _BVH_Builder_Header |
| 18 | |
| 19 | #include <BVH_Set.hxx> |
| 20 | #include <BVH_Tree.hxx> |
| 21 | |
| 22 | #include <NCollection_Vector.hxx> |
| 23 | |
| 24 | namespace |
| 25 | { |
| 26 | //! Minimum node size to split. |
| 27 | const Standard_Real THE_NODE_MIN_SIZE = 1e-5; |
| 28 | } |
| 29 | |
| 30 | //! Performs building of BVH tree. |
| 31 | template<class T, int N> |
| 32 | class BVH_Builder |
| 33 | { |
| 34 | public: |
| 35 | |
| 36 | //! Creates abstract BVH builder. |
| 37 | BVH_Builder (const Standard_Integer theLeafNodeSize, |
| 38 | const Standard_Integer theMaxTreeDepth); |
| 39 | |
| 40 | //! Releases resources of BVH builder. |
| 41 | virtual ~BVH_Builder() = 0; |
| 42 | |
| 43 | public: |
| 44 | |
| 45 | //! Builds BVH using specified algorithm. |
| 46 | void Build (BVH_Set<T, N>* theSet, |
| 47 | BVH_Tree<T, N>* theBVH, |
| 48 | const BVH_Box<T, N>& theBox); |
| 49 | |
| 50 | protected: |
| 51 | |
| 52 | //! Builds BVH node for specified task info. |
| 53 | virtual void BuildNode (BVH_Set<T, N>* theSet, |
| 54 | BVH_Tree<T, N>* theBVH, |
| 55 | const Standard_Integer theTask); |
| 56 | |
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57 | //! Updates depth of constructed BVH tree. |
| 58 | void UpdateDepth (BVH_Tree<T, N>* theBVH, |
| 59 | const Standard_Integer theLevel) |
| 60 | { |
| 61 | if (theLevel > theBVH->myDepth) |
| 62 | { |
| 63 | theBVH->myDepth = theLevel; |
| 64 | } |
| 65 | } |
| 66 | |
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67 | protected: |
| 68 | |
| 69 | Standard_Integer myMaxTreeDepth; //!< Maximum depth of constructed BVH |
| 70 | Standard_Integer myLeafNodeSize; //!< Maximum number of primitives per leaf |
| 71 | NCollection_Vector<Standard_Integer> myTasksQueue; //!< Queue to manage BVH node building tasks |
| 72 | |
| 73 | }; |
| 74 | |
| 75 | #include <BVH_Builder.lxx> |
| 76 | |
| 77 | #endif // _BVH_Builder_Header |
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