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_RectangularFrustum_HeaderFile
17 #define _SelectMgr_RectangularFrustum_HeaderFile
19 #include <SelectMgr_Frustum.hxx>
21 //! This class contains representation of rectangular selecting frustum, created in case
22 //! of point and box selection, and algorithms for overlap detection between selecting
23 //! frustum and sensitive entities. The principle of frustum calculation:
24 //! - for point selection: on a near view frustum plane rectangular neighborhood of
25 //! user-picked point is created according to the pixel tolerance
26 //! given and then this rectangle is projected onto far view frustum
27 //! plane. This rectangles define the parallel bases of selecting frustum;
28 //! - for box selection: box points are projected onto near and far view frustum planes.
29 //! These 2 projected rectangles define parallel bases of selecting frustum.
30 //! Overlap detection tests are implemented according to the terms of separating axis
32 class SelectMgr_RectangularFrustum : public SelectMgr_Frustum<4>
36 SelectMgr_RectangularFrustum() {};
38 //! Builds volume according to the point and given pixel tolerance
39 virtual void Build (const gp_Pnt2d& thePoint) Standard_OVERRIDE;
41 //! Builds volume according to the selected rectangle
42 virtual void Build (const gp_Pnt2d& theMinPnt,
43 const gp_Pnt2d& theMaxPnt) Standard_OVERRIDE;
45 //! Returns a copy of the frustum transformed according to the matrix given
46 virtual NCollection_Handle<SelectMgr_BaseFrustum> Transform (const gp_Trsf& theTrsf) Standard_OVERRIDE;
48 //! IMPORTANT: Makes sense only for frustum built on a single point!
49 //! Returns a copy of the frustum resized according to the scale factor given
50 virtual NCollection_Handle<SelectMgr_BaseFrustum> Scale (const Standard_Real theScaleFactor) Standard_OVERRIDE;
53 // SAT Tests for different objects
55 //! SAT intersection test between defined volume and given axis-aligned box
56 virtual Standard_Boolean Overlaps (const BVH_Box<Standard_Real, 3>& theBox,
57 Standard_Real& theDepth) Standard_OVERRIDE;
59 //! Returns true if selecting volume is overlapped by axis-aligned bounding box
60 //! with minimum corner at point theMinPt and maximum at point theMaxPt
61 virtual Standard_Boolean Overlaps (const SelectMgr_Vec3& theBoxMin,
62 const SelectMgr_Vec3& theBoxMax,
63 Standard_Boolean* theInside = NULL) Standard_OVERRIDE;
65 //! Intersection test between defined volume and given point
66 virtual Standard_Boolean Overlaps (const gp_Pnt& thePnt,
67 Standard_Real& theDepth) Standard_OVERRIDE;
69 //! SAT intersection test between defined volume and given ordered set of points,
70 //! representing line segments. The test may be considered of interior part or
71 //! boundary line defined by segments depending on given sensitivity type
72 virtual Standard_Boolean Overlaps (const Handle(TColgp_HArray1OfPnt)& theArrayOfPnts,
73 Select3D_TypeOfSensitivity theSensType,
74 Standard_Real& theDepth) Standard_OVERRIDE;
76 //! Checks if line segment overlaps selecting frustum
77 virtual Standard_Boolean Overlaps (const gp_Pnt& thePnt1,
78 const gp_Pnt& thePnt2,
79 Standard_Real& theDepth) Standard_OVERRIDE;
81 //! SAT intersection test between defined volume and given triangle. The test may
82 //! be considered of interior part or boundary line defined by triangle vertices
83 //! depending on given sensitivity type
84 virtual Standard_Boolean Overlaps (const gp_Pnt& thePnt1,
85 const gp_Pnt& thePnt2,
86 const gp_Pnt& thePnt3,
87 Select3D_TypeOfSensitivity theSensType,
88 Standard_Real& theDepth) Standard_OVERRIDE;
90 //! Measures distance between 3d projection of user-picked
91 //! screen point and given point theCOG
92 virtual Standard_Real DistToGeometryCenter (const gp_Pnt& theCOG) Standard_OVERRIDE;
94 //! Calculates the point on a view ray that was detected during the run of selection algo by given depth
95 virtual SelectMgr_Vec3 DetectedPoint (const Standard_Real theDepth) const Standard_OVERRIDE;
97 //! Checks if the point of sensitive in which selection was detected belongs
98 //! to the region defined by clipping planes
99 virtual Standard_Boolean IsClipped (const Graphic3d_SequenceOfHClipPlane& thePlanes,
100 const Standard_Real theDepth) Standard_OVERRIDE;
104 void segmentSegmentDistance (const gp_Pnt& theSegPnt1,
105 const gp_Pnt& theSegPnt2,
106 Standard_Real& theDepth);
108 void segmentPlaneIntersection (const SelectMgr_Vec3& thePlane,
109 const gp_Pnt& thePntOnPlane,
110 Standard_Real& theDepth);
114 SelectMgr_Vec3 myNearPickedPnt; //!< 3d projection of user-picked selection point onto near view plane
115 SelectMgr_Vec3 myFarPickedPnt; //!< 3d projection of user-picked selection point onto far view plane
116 SelectMgr_Vec3 myViewRayDir;
117 gp_Pnt2d myMousePos; //!< Mouse coordinates
120 #endif // _SelectMgr_RectangularFrustum_HeaderFile