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 //! NOTE: the object of this class can be created only as part of SelectMgr_TriangularFrustumSet.
27 class SelectMgr_TriangularFrustum : public SelectMgr_Frustum<3>
31 //! Creates new triangular frustum with bases of triangles with vertices theP1,
32 //! theP2 and theP3 projections onto near and far view frustum planes
33 SelectMgr_TriangularFrustum() {}
37 //! Auxiliary structure to define selection triangle
38 struct SelectionTriangle
43 Standard_EXPORT ~SelectMgr_TriangularFrustum();
45 //! Initializes selection triangle by input points
46 Standard_EXPORT void Init (const gp_Pnt2d& theP1,
47 const gp_Pnt2d& theP2,
48 const gp_Pnt2d& theP3);
50 //! Creates new triangular frustum with bases of triangles with vertices theP1, theP2 and theP3
51 //! projections onto near and far view frustum planes (only for triangular frustums)
52 //! NOTE: it should be called after Init() method
53 Standard_EXPORT virtual void Build() Standard_OVERRIDE;
55 //! Returns a copy of the frustum transformed according to the matrix given
56 Standard_EXPORT virtual Handle(SelectMgr_BaseIntersector) ScaleAndTransform (const Standard_Integer theScale,
57 const gp_GTrsf& theTrsf,
58 const Handle(SelectMgr_FrustumBuilder)& theBuilder) const Standard_OVERRIDE;
60 // SAT Tests for different objects
62 //! SAT intersection test between defined volume and given axis-aligned box
63 Standard_EXPORT virtual Standard_Boolean OverlapsBox (const SelectMgr_Vec3& theMinPnt,
64 const SelectMgr_Vec3& theMaxPnt,
65 const SelectMgr_ViewClipRange& theClipRange,
66 SelectBasics_PickResult& thePickResult) const Standard_OVERRIDE;
68 //! Returns true if selecting volume is overlapped by axis-aligned bounding box
69 //! with minimum corner at point theMinPt and maximum at point theMaxPt
70 Standard_EXPORT virtual Standard_Boolean OverlapsBox (const SelectMgr_Vec3& theMinPt,
71 const SelectMgr_Vec3& theMaxPt,
72 Standard_Boolean* theInside) const Standard_OVERRIDE;
74 //! Intersection test between defined volume and given point
75 Standard_EXPORT virtual Standard_Boolean OverlapsPoint (const gp_Pnt& thePnt,
76 const SelectMgr_ViewClipRange& theClipRange,
77 SelectBasics_PickResult& thePickResult) const Standard_OVERRIDE;
79 //! SAT intersection test between defined volume and given ordered set of points,
80 //! representing line segments. The test may be considered of interior part or
81 //! boundary line defined by segments depending on given sensitivity type
82 Standard_EXPORT virtual Standard_Boolean OverlapsPolygon (const TColgp_Array1OfPnt& theArrayOfPnts,
83 Select3D_TypeOfSensitivity theSensType,
84 const SelectMgr_ViewClipRange& theClipRange,
85 SelectBasics_PickResult& thePickResult) const Standard_OVERRIDE;
87 //! Checks if line segment overlaps selecting frustum
88 Standard_EXPORT virtual Standard_Boolean OverlapsSegment (const gp_Pnt& thePnt1,
89 const gp_Pnt& thePnt2,
90 const SelectMgr_ViewClipRange& theClipRange,
91 SelectBasics_PickResult& thePickResult) const Standard_OVERRIDE;
93 //! SAT intersection test between defined volume and given triangle. The test may
94 //! be considered of interior part or boundary line defined by triangle vertices
95 //! depending on given sensitivity type
96 Standard_EXPORT virtual Standard_Boolean OverlapsTriangle (const gp_Pnt& thePnt1,
97 const gp_Pnt& thePnt2,
98 const gp_Pnt& thePnt3,
99 Select3D_TypeOfSensitivity theSensType,
100 const SelectMgr_ViewClipRange& theClipRange,
101 SelectBasics_PickResult& thePickResult) const Standard_OVERRIDE;
103 //! Nullifies the handle to corresponding builder instance to prevent memory leaks
104 Standard_EXPORT void Clear();
106 //! Stores plane equation coefficients (in the following form:
107 //! Ax + By + Cz + D = 0) to the given vector
108 Standard_EXPORT virtual void GetPlanes (NCollection_Vector<SelectMgr_Vec4>& thePlaneEquations) const Standard_OVERRIDE;
110 //! Dumps the content of me into the stream
111 Standard_EXPORT virtual void DumpJson (Standard_OStream& theOStream, Standard_Integer theDepth = -1) const Standard_OVERRIDE;
115 void cacheVertexProjections (SelectMgr_TriangularFrustum* theFrustum) const;
119 SelectionTriangle mySelTriangle; //!< parameters of selection triangle (it is used to build triangle frustum)
123 DEFINE_STANDARD_RTTIEXT(SelectMgr_TriangularFrustum, SelectMgr_Frustum<3>)
125 friend class SelectMgr_TriangularFrustumSet;
128 #endif // _SelectMgr_TriangularFrustum_HeaderFile