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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_Geometry_Header |
17 | #define _BVH_Geometry_Header |
18 | |
19 | #include <BVH_ObjectSet.hxx> |
20 | #include <BVH_Builder.hxx> |
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21 | #include <BVH_BinnedBuilder.hxx> |
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22 | |
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23 | //! BVH geometry as a set of abstract geometric objects |
24 | //! organized with bounding volume hierarchy (BVH). |
25 | //! \tparam T Numeric data type |
26 | //! \tparam N Vector dimension |
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27 | template<class T, int N> |
28 | class BVH_Geometry : public BVH_ObjectSet<T, N> |
29 | { |
30 | public: |
31 | |
32 | //! Creates uninitialized BVH geometry. |
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33 | BVH_Geometry() |
34 | : myIsDirty (Standard_False), |
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35 | myBVH (new BVH_Tree<T, N>()), |
36 | // set default builder - binned SAH split |
37 | myBuilder (new BVH_BinnedBuilder<T, N, BVH_Constants_NbBinsOptimal> (BVH_Constants_LeafNodeSizeSingle)) |
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38 | { |
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39 | // |
40 | } |
41 | |
42 | //! Creates uninitialized BVH geometry. |
43 | BVH_Geometry (const opencascade::handle<BVH_Builder<T, N> >& theBuilder) |
44 | : myIsDirty (Standard_False), |
45 | myBVH (new BVH_Tree<T, N>()), |
46 | myBuilder (theBuilder) |
47 | { |
48 | // |
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49 | } |
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50 | |
51 | //! Releases resources of BVH geometry. |
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52 | virtual ~BVH_Geometry() |
53 | { |
54 | myBVH.Nullify(); |
55 | myBuilder.Nullify(); |
56 | } |
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57 | |
58 | public: |
59 | |
60 | //! Marks geometry as outdated. |
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61 | virtual void MarkDirty() { myIsDirty = Standard_True; } |
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62 | |
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63 | //! Returns AABB of the given object. |
64 | using BVH_ObjectSet<T, N>::Box; |
65 | |
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66 | //! Returns AABB of the whole geometry. |
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67 | virtual BVH_Box<T, N> Box() const Standard_OVERRIDE |
68 | { |
69 | if (myIsDirty) |
70 | { |
71 | myBox = BVH_Set<T, N>::Box(); |
72 | } |
73 | return myBox; |
74 | } |
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75 | |
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76 | //! Returns BVH tree (and builds it if necessary). |
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77 | virtual const opencascade::handle<BVH_Tree<T, N> >& BVH() |
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78 | { |
79 | if (myIsDirty) |
80 | { |
81 | Update(); |
82 | } |
83 | return myBVH; |
84 | } |
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85 | |
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86 | //! Returns the method (builder) used to construct BVH. |
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87 | virtual const opencascade::handle<BVH_Builder<T, N> >& Builder() const { return myBuilder; } |
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88 | |
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89 | //! Sets the method (builder) used to construct BVH. |
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90 | virtual void SetBuilder (const opencascade::handle<BVH_Builder<T, N> >& theBuilder) { myBuilder = theBuilder; } |
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91 | |
92 | protected: |
93 | |
94 | //! Updates internal geometry state. |
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95 | virtual void Update() |
96 | { |
97 | if (myIsDirty) |
98 | { |
99 | myBuilder->Build (this, myBVH.operator->(), Box()); |
100 | myIsDirty = Standard_False; |
101 | } |
102 | } |
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103 | |
104 | protected: |
105 | |
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106 | Standard_Boolean myIsDirty; //!< Is geometry state outdated? |
107 | opencascade::handle<BVH_Tree<T, N> > myBVH; //!< Constructed hight-level BVH |
108 | opencascade::handle<BVH_Builder<T, N> > myBuilder; //!< Builder for hight-level BVH |
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109 | |
110 | mutable BVH_Box<T, N> myBox; //!< Cached bounding box of geometric objects |
111 | |
112 | }; |
113 | |
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114 | #endif // _BVH_Geometry_Header |