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1 | // Created on: 2014-05-22 |
2 | // Created by: Varvara POSKONINA |
3 | // Copyright (c) 2005-2014 OPEN CASCADE SAS |
4 | // |
5 | // This file is part of Open CASCADE Technology software library. |
6 | // |
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. |
12 | // |
13 | // Alternatively, this file may be used under the terms of Open CASCADE |
14 | // commercial license or contractual agreement. |
15 | |
16 | #ifndef _SelectMgr_TriangularFrustum_HeaderFile |
17 | #define _SelectMgr_TriangularFrustum_HeaderFile |
18 | |
19 | #include <SelectMgr_Frustum.hxx> |
20 | |
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 |
25 | //! theorem (SAT). |
26 | class SelectMgr_TriangularFrustum : public SelectMgr_Frustum<3> |
27 | { |
28 | public: |
29 | |
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() {}; |
33 | |
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34 | Standard_EXPORT ~SelectMgr_TriangularFrustum(); |
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35 | |
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) |
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38 | Standard_EXPORT virtual void Build (const gp_Pnt2d& theP1, |
39 | const gp_Pnt2d& theP2, |
40 | const gp_Pnt2d& theP3) Standard_OVERRIDE; |
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41 | |
42 | //! Returns a copy of the frustum transformed according to the matrix given |
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43 | Standard_EXPORT virtual Handle(SelectMgr_BaseFrustum) ScaleAndTransform (const Standard_Integer theScale, |
44 | const gp_GTrsf& theTrsf) const Standard_OVERRIDE; |
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45 | |
46 | // SAT Tests for different objects |
47 | |
48 | //! SAT intersection test between defined volume and given axis-aligned box |
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49 | Standard_EXPORT virtual Standard_Boolean Overlaps (const SelectMgr_Vec3& theMinPnt, |
50 | const SelectMgr_Vec3& theMaxPnt, |
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51 | SelectBasics_PickResult& thePickResult) const Standard_OVERRIDE; |
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52 | |
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 |
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55 | Standard_EXPORT virtual Standard_Boolean Overlaps (const SelectMgr_Vec3& theMinPt, |
56 | const SelectMgr_Vec3& theMaxPt, |
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57 | Standard_Boolean* theInside) const Standard_OVERRIDE; |
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58 | |
59 | //! Intersection test between defined volume and given point |
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60 | Standard_EXPORT virtual Standard_Boolean Overlaps (const gp_Pnt& thePnt, |
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61 | SelectBasics_PickResult& thePickResult) const Standard_OVERRIDE; |
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62 | |
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 |
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66 | Standard_EXPORT virtual Standard_Boolean Overlaps (const TColgp_Array1OfPnt& theArrayOfPnts, |
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67 | Select3D_TypeOfSensitivity theSensType, |
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68 | SelectBasics_PickResult& thePickResult) const Standard_OVERRIDE; |
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69 | |
70 | //! Checks if line segment overlaps selecting frustum |
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71 | Standard_EXPORT virtual Standard_Boolean Overlaps (const gp_Pnt& thePnt1, |
72 | const gp_Pnt& thePnt2, |
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73 | SelectBasics_PickResult& thePickResult) const Standard_OVERRIDE; |
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74 | |
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 |
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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, |
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82 | SelectBasics_PickResult& thePickResult) const Standard_OVERRIDE; |
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83 | |
84 | //! Nullifies the handle to corresponding builder instance to prevent memory leaks |
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85 | Standard_EXPORT void Clear(); |
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86 | |
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87 | //! Stores plane equation coefficients (in the following form: |
88 | //! Ax + By + Cz + D = 0) to the given vector |
89 | Standard_EXPORT virtual void GetPlanes (NCollection_Vector<SelectMgr_Vec4>& thePlaneEquations) const Standard_OVERRIDE; |
90 | |
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91 | private: |
92 | |
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93 | void cacheVertexProjections (SelectMgr_TriangularFrustum* theFrustum) const; |
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94 | |
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95 | DEFINE_STANDARD_RTTIEXT(SelectMgr_TriangularFrustum,SelectMgr_Frustum<3>) |
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96 | }; |
97 | |
98 | #endif // _SelectMgr_TriangularFrustum_HeaderFile |