1 // Created on: 2015-06-30
2 // Created by: Anton POLETAEV
3 // Copyright (c) 2015 OPEN CASCADE SAS
5 // This file is part of Open CASCADE Technology software library.
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.
13 // Alternatively, this file may be used under the terms of Open CASCADE
14 // commercial license or contractual agreement.
16 #ifndef _SelectMgr_SelectableObjectTrsfPersSet_HeaderFile
17 #define _SelectMgr_SelectableObjectTrsfPersSet_HeaderFile
19 #include <BVH_Builder.hxx>
20 #include <BVH_Set.hxx>
21 #include <BVH_Tree.hxx>
22 #include <Graphic3d_Camera.hxx>
23 #include <Graphic3d_WorldViewProjState.hxx>
24 #include <NCollection_Handle.hxx>
25 #include <NCollection_IndexedMap.hxx>
26 #include <Select3D_BndBox3d.hxx>
27 #include <SelectMgr_SelectableObject.hxx>
29 //! Primitive set specialized for transformation persistent selectable objects.
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 SelectMgr_SelectableObjectTrsfPersSet : public BVH_Set<Standard_Real, 3>
37 typedef NCollection_Handle<Select3D_BndBox3d> HBndBox3d;
39 Handle(SelectMgr_SelectableObject) EMPTY_OBJ;
43 //! Creates new empty objects set and initializes BVH tree
44 //! builder to Linear builder with 1 element per list.
45 Standard_EXPORT SelectMgr_SelectableObjectTrsfPersSet();
47 //! Returns size of objects set.
48 Standard_EXPORT virtual Standard_Integer Size() const Standard_OVERRIDE;
50 //! Returns bounding box of object with index theIndex.
51 Standard_EXPORT virtual Select3D_BndBox3d Box (const Standard_Integer theIndex) const Standard_OVERRIDE;
53 //! Returns center of object with index theIndex in the set along the given axis theAxis.
54 Standard_EXPORT virtual Standard_Real Center (const Standard_Integer theIndex,
55 const Standard_Integer theAxis) const Standard_OVERRIDE;
57 //! Swaps items with indexes theIndex1 and theIndex2 in the set.
58 Standard_EXPORT virtual void Swap (const Standard_Integer theIndex1,
59 const Standard_Integer theIndex2) Standard_OVERRIDE;
61 //! Adds new selectable object to the set.
62 //! @return true if structure added, otherwise returns false (structure already in the set).
63 Standard_EXPORT Standard_Boolean Append (const Handle(SelectMgr_SelectableObject)& theObject);
65 //! Removes selectable object from set.
66 //! @return true if structure removed, otherwise returns false (structure is not in the set).
67 Standard_EXPORT Standard_Boolean Remove (const Handle(SelectMgr_SelectableObject)& theObject);
69 //! Returns object from set by theIndex given.
70 const Handle(SelectMgr_SelectableObject)& GetObjectById (const Standard_Integer theIndex) const
72 return myObjects.FindKey (theIndex + 1);
75 //! Marks object state as outdated (needs BVH rebuilding).
78 myIsDirty = Standard_True;
81 //! Returns true if this objects set contains theObject given
82 Standard_Boolean Contains (const Handle(SelectMgr_SelectableObject)& theObject) const
84 return myObjects.Contains (theObject);
87 //! Returns BVH tree for the given world view projection (builds it if necessary).
88 const NCollection_Handle<BVH_Tree<Standard_Real, 3> >& BVH (const Graphic3d_Mat4d& theProjectionMatrix,
89 const Graphic3d_Mat4d& theWorldViewMatrix,
90 const Graphic3d_WorldViewProjState& theWVPState);
94 //! Marks internal object state as outdated.
95 Standard_Boolean myIsDirty;
97 //! Constructed bottom-level BVH.
98 NCollection_Handle<BVH_Tree<Standard_Real, 3> > myBVH;
100 //! Builder for bottom-level BVH.
101 NCollection_Handle<BVH_Builder<Standard_Real, 3> > myBuilder;
103 //! Set of transform persistence objects.
104 NCollection_IndexedMap<Handle(SelectMgr_SelectableObject)> myObjects;
106 //! Cached set of bounding boxes precomputed for transformation persistent selectable objects.
107 //! Cache exists only during computation of BVH Tree. Bounding boxes are world view projection
108 //! dependent and should by synchronized.
109 NCollection_IndexedMap<HBndBox3d> myObjectBoxes;
111 //! State of world view projection used for generation of transformation persistence bounding boxes.
112 Graphic3d_WorldViewProjState myObjectBoxesState;