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1 | // Created on: 2015-06-30 |
2 | // Created by: Anton POLETAEV |
3 | // Copyright (c) 2015 OPEN CASCADE SAS |
4 | // |
5 | // This file is part of Open CASCADE Technology software library. |
6 | // |
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 |
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 _OpenGl_BVHClipPrimitiveTrsfPersSet_HeaderFile |
17 | #define _OpenGl_BVHClipPrimitiveTrsfPersSet_HeaderFile |
18 | |
19 | #include <BVH_Builder.hxx> |
20 | #include <BVH_Set.hxx> |
21 | #include <BVH_Tree.hxx> |
22 | #include <Graphic3d_BndBox4f.hxx> |
23 | #include <Graphic3d_WorldViewProjState.hxx> |
24 | #include <NCollection_Handle.hxx> |
25 | #include <NCollection_IndexedMap.hxx> |
26 | #include <OpenGl_Structure.hxx> |
27 | #include <OpenGl_Vec.hxx> |
28 | |
29 | //! Set of transformation persistent OpenGl_Structure for building BVH tree. |
30 | //! Provides built-in mechanism to invalidate tree when world view projection state changes. |
31 | //! Due to frequent invalidation of BVH tree the choice of BVH tree builder is made |
32 | //! in favor of BVH linear builder (quick rebuild). |
33 | class OpenGl_BVHClipPrimitiveTrsfPersSet : public BVH_Set<Standard_ShortReal, 4> |
34 | { |
35 | private: |
36 | |
37 | typedef NCollection_Handle<Graphic3d_BndBox4f> HBndBox4f; |
38 | |
39 | public: |
40 | |
41 | //! Creates an empty primitive set for BVH clipping. |
42 | OpenGl_BVHClipPrimitiveTrsfPersSet(); |
43 | |
44 | //! Returns total number of structures. |
45 | virtual Standard_Integer Size() const Standard_OVERRIDE; |
46 | |
47 | //! Returns AABB of the structure. |
48 | virtual Graphic3d_BndBox4f Box (const Standard_Integer theIdx) const Standard_OVERRIDE; |
49 | |
50 | //! Calculates center of the AABB along given axis. |
51 | virtual Standard_ShortReal Center (const Standard_Integer theIdx, |
52 | const Standard_Integer theAxis) const Standard_OVERRIDE; |
53 | |
54 | //! Swaps structures with the given indices. |
55 | virtual void Swap (const Standard_Integer theIdx1, |
56 | const Standard_Integer theIdx2) Standard_OVERRIDE; |
57 | |
58 | //! Adds structure to the set. |
59 | //! @return true if structure added, otherwise returns false (structure already in the set). |
60 | Standard_Boolean Add (const OpenGl_Structure* theStruct); |
61 | |
62 | //! Removes the given structure from the set. |
63 | //! @return true if structure removed, otherwise returns false (structure is not in the set). |
64 | Standard_Boolean Remove (const OpenGl_Structure* theStruct); |
65 | |
66 | //! Cleans the whole primitive set. |
67 | void Clear(); |
68 | |
69 | //! Returns the structure corresponding to the given ID. |
70 | const OpenGl_Structure* GetStructureById (Standard_Integer theId); |
71 | |
72 | //! Marks object state as outdated (needs BVH rebuilding). |
73 | void MarkDirty() |
74 | { |
75 | myIsDirty = Standard_True; |
76 | } |
77 | |
78 | //! Returns BVH tree for the given world view projection (builds it if necessary). |
79 | const NCollection_Handle<BVH_Tree<Standard_ShortReal, 4> >& BVH (const OpenGl_Mat4& theProjectionMatrix, |
80 | const OpenGl_Mat4& theWorldViewMatrix, |
81 | const Graphic3d_WorldViewProjState& theWVPState); |
82 | |
83 | private: |
84 | |
85 | //! Marks internal object state as outdated. |
86 | Standard_Boolean myIsDirty; |
87 | |
88 | //! Constructed bottom-level BVH. |
89 | NCollection_Handle<BVH_Tree<Standard_ShortReal, 4> > myBVH; |
90 | |
91 | //! Builder for bottom-level BVH. |
92 | NCollection_Handle<BVH_Builder<Standard_ShortReal, 4> > myBuilder; |
93 | |
94 | //! Indexed map of structures. |
95 | NCollection_IndexedMap<const OpenGl_Structure*> myStructs; |
96 | |
97 | //! Cached set of bounding boxes precomputed for transformation persistent selectable objects. |
98 | //! Cache exists only during computation of BVH Tree. Bounding boxes are world view projection |
99 | //! dependent and should by synchronized. |
100 | NCollection_IndexedMap<HBndBox4f> myStructBoxes; |
101 | |
102 | //! State of world view projection used for generation of transformation persistence bounding boxes. |
103 | Graphic3d_WorldViewProjState myStructBoxesState; |
104 | }; |
105 | |
106 | #endif // _OpenGl_BVHClipPrimitiveTrsfPersSet_HeaderFile |