1 // Created on: 2014-05-22
2 // Created by: Varvara POSKONINA
3 // Copyright (c) 2005-2014 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_TriangularFrustum_HeaderFile
17 #define _SelectMgr_TriangularFrustum_HeaderFile
19 #include <SelectMgr_Frustum.hxx>
21 //! This class contains representation of triangular selecting frustum, created in case
22 //! of polyline selection, and algorithms for overlap detection between selecting
23 //! frustum and sensitive entities.
24 //! Overlap detection tests are implemented according to the terms of separating axis
26 class SelectMgr_TriangularFrustum : public SelectMgr_Frustum<3>
30 //! Creates new triangular frustum with bases of triangles with vertices theP1,
31 //! theP2 and theP3 projections onto near and far view frustum planes
32 SelectMgr_TriangularFrustum() {};
34 Standard_EXPORT ~SelectMgr_TriangularFrustum();
36 //! Creates new triangular frustum with bases of triangles with vertices theP1, theP2 and theP3
37 //! projections onto near and far view frustum planes (only for triangular frustums)
38 Standard_EXPORT virtual void Build (const gp_Pnt2d& theP1,
39 const gp_Pnt2d& theP2,
40 const gp_Pnt2d& theP3) Standard_OVERRIDE;
42 //! Returns a copy of the frustum transformed according to the matrix given
43 Standard_EXPORT virtual Handle(SelectMgr_BaseFrustum) ScaleAndTransform (const Standard_Integer theScale,
44 const gp_GTrsf& theTrsf) const Standard_OVERRIDE;
46 // SAT Tests for different objects
48 //! SAT intersection test between defined volume and given axis-aligned box
49 Standard_EXPORT virtual Standard_Boolean Overlaps (const SelectMgr_Vec3& theMinPnt,
50 const SelectMgr_Vec3& theMaxPnt,
51 Standard_Real& theDepth) Standard_OVERRIDE;
53 //! Returns true if selecting volume is overlapped by axis-aligned bounding box
54 //! with minimum corner at point theMinPt and maximum at point theMaxPt
55 Standard_EXPORT virtual Standard_Boolean Overlaps (const SelectMgr_Vec3& theMinPt,
56 const SelectMgr_Vec3& theMaxPt,
57 Standard_Boolean* theInside) Standard_OVERRIDE;
59 //! Intersection test between defined volume and given point
60 Standard_EXPORT virtual Standard_Boolean Overlaps (const gp_Pnt& thePnt,
61 Standard_Real& theDepth) Standard_OVERRIDE;
63 //! SAT intersection test between defined volume and given ordered set of points,
64 //! representing line segments. The test may be considered of interior part or
65 //! boundary line defined by segments depending on given sensitivity type
66 Standard_EXPORT virtual Standard_Boolean Overlaps (const TColgp_Array1OfPnt& theArrayOfPnts,
67 Select3D_TypeOfSensitivity theSensType,
68 Standard_Real& theDepth) Standard_OVERRIDE;
70 //! Checks if line segment overlaps selecting frustum
71 Standard_EXPORT virtual Standard_Boolean Overlaps (const gp_Pnt& thePnt1,
72 const gp_Pnt& thePnt2,
73 Standard_Real& theDepth) Standard_OVERRIDE;
75 //! SAT intersection test between defined volume and given triangle. The test may
76 //! be considered of interior part or boundary line defined by triangle vertices
77 //! depending on given sensitivity type
78 Standard_EXPORT virtual Standard_Boolean Overlaps (const gp_Pnt& thePnt1,
79 const gp_Pnt& thePnt2,
80 const gp_Pnt& thePnt3,
81 Select3D_TypeOfSensitivity theSensType,
82 Standard_Real& theDepth) Standard_OVERRIDE;
84 //! Nullifies the handle to corresponding builder instance to prevent memory leaks
85 Standard_EXPORT void Clear();
89 void cacheVertexProjections (SelectMgr_TriangularFrustum* theFrustum) const;
91 DEFINE_STANDARD_RTTIEXT(SelectMgr_TriangularFrustum,Standard_Transient)
94 #endif // _SelectMgr_TriangularFrustum_HeaderFile