1 // Created on: 1995-03-13
2 // Created by: Robert COUBLANC
3 // Copyright (c) 1995-1999 Matra Datavision
4 // Copyright (c) 1999-2014 OPEN CASCADE SAS
6 // This file is part of Open CASCADE Technology software library.
8 // This library is free software; you can redistribute it and/or modify it under
9 // the terms of the GNU Lesser General Public License version 2.1 as published
10 // by the Free Software Foundation, with special exception defined in the file
11 // OCCT_LGPL_EXCEPTION.txt. Consult the file LICENSE_LGPL_21.txt included in OCCT
12 // distribution for complete text of the license and disclaimer of any warranty.
14 // Alternatively, this file may be used under the terms of Open CASCADE
15 // commercial license or contractual agreement.
17 #ifndef _Select3D_SensitiveEntity_HeaderFile
18 #define _Select3D_SensitiveEntity_HeaderFile
20 #include <gp_GTrsf.hxx>
21 #include <gp_Trsf.hxx>
22 #include <Standard_Assert.hxx>
23 #include <Standard_Transient.hxx>
24 #include <Select3D_BndBox3d.hxx>
25 #include <SelectBasics_SelectingVolumeManager.hxx>
26 #include <SelectBasics_PickResult.hxx>
27 #include <SelectBasics_SensitiveEntity.hxx>
28 #include <SelectMgr_SelectingVolumeManager.hxx>
29 #include <TopLoc_Location.hxx>
31 class SelectMgr_EntityOwner;
33 //! Abstract framework to define 3D sensitive entities.
34 class Select3D_SensitiveEntity : public Standard_Transient
36 DEFINE_STANDARD_RTTIEXT(Select3D_SensitiveEntity, Standard_Transient)
39 //! Returns pointer to owner of the entity
40 const Handle(SelectMgr_EntityOwner)& OwnerId() const { return myOwnerId; }
42 //! Sets owner of the entity
43 virtual void Set (const Handle(SelectMgr_EntityOwner)& theOwnerId)
45 myOwnerId = theOwnerId;
48 //! allows a better sensitivity for a specific entity in selection algorithms useful for small sized entities.
49 Standard_Integer SensitivityFactor() const { return mySFactor; }
51 //! Allows to manage sensitivity of a particular sensitive entity
52 void SetSensitivityFactor (const Standard_Integer theNewSens)
54 Standard_ASSERT_RAISE (theNewSens > 0, "Error! Selection sensitivity have positive value.");
55 mySFactor = theNewSens;
58 //! Originally this method intended to return sensitive entity with new location aLocation,
59 //! but currently sensitive entities do not hold a location,
60 //! instead HasLocation() and Location() methods call corresponding entity owner's methods.
61 //! Thus all entities returned by GetConnected() share the same location propagated from corresponding selectable object.
62 //! You must redefine this function for any type of sensitive entity which can accept another connected sensitive entity.
63 virtual Handle(Select3D_SensitiveEntity) GetConnected() { return Handle(Select3D_SensitiveEntity)(); }
65 //! Checks whether sensitive overlaps current selecting volume.
66 //! Stores minimum depth, distance to center of geometry and closest point detected into thePickResult
67 virtual Standard_Boolean Matches (SelectBasics_SelectingVolumeManager& theMgr,
68 SelectBasics_PickResult& thePickResult) = 0;
70 //! Returns the number of sub-entities or elements in sensitive entity.
71 //! Is used to determine if entity is complex and needs to pre-build BVH at the creation of sensitive entity step
72 //! or is light-weighted so the tree can be build on demand with unnoticeable delay.
73 virtual Standard_Integer NbSubElements() const = 0;
75 //! Returns bounding box of a sensitive with transformation applied
76 virtual Select3D_BndBox3d BoundingBox() = 0;
78 //! Returns center of a sensitive with transformation applied
79 virtual gp_Pnt CenterOfGeometry() const = 0;
81 //! Builds BVH tree for a sensitive if needed
84 //! Returns TRUE if BVH tree is in invalidated state
85 virtual Standard_Boolean ToBuildBVH() const { return Standard_True; }
87 //! Clears up all resources and memory
88 virtual void Clear() { Set (Handle(SelectMgr_EntityOwner)()); }
90 //! Returns true if the shape corresponding to the entity has init location
91 virtual Standard_Boolean HasInitLocation() const { return Standard_False; }
93 //! Returns inversed location transformation matrix if the shape corresponding to this entity has init location set.
94 //! Otherwise, returns identity matrix.
95 virtual gp_GTrsf InvInitLocation() const { return gp_GTrsf(); }
97 //! Dumps the content of me into the stream
98 Standard_EXPORT virtual void DumpJson (Standard_OStream& theOStream, Standard_Integer theDepth = -1) const;
102 Standard_EXPORT Select3D_SensitiveEntity (const Handle(SelectMgr_EntityOwner)& theOwnerId);
106 Handle(SelectMgr_EntityOwner) myOwnerId;
107 Standard_Integer mySFactor;
111 DEFINE_STANDARD_HANDLE(Select3D_SensitiveEntity, Standard_Transient)
113 // for porting old code
114 typedef Select3D_SensitiveEntity SelectBasics_SensitiveEntity;
116 #endif // _Select3D_SensitiveEntity_HeaderFile