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_TriangularFrustumSet_HeaderFile 17 #define _SelectMgr_TriangularFrustumSet_HeaderFile 18 19 #include <NCollection_Handle.hxx> 20 #include <NCollection_List.hxx> 21 22 #include <SelectMgr_BaseFrustum.hxx> 23 #include <SelectMgr_TriangularFrustum.hxx> 24 25 typedef NCollection_List<Handle(SelectMgr_TriangularFrustum)> SelectMgr_TriangFrustums; 26 typedef NCollection_List<Handle(SelectMgr_TriangularFrustum)>::Iterator SelectMgr_TriangFrustumsIter; 27 28 //! This class is used to handle polyline selection. The main principle of polyline selection 29 //! algorithm is to split the polygon defined by polyline onto triangles. Than each of 30 //! them is considered as a base for triangular frustum building. In other 31 //! words, each triangle vertiex will be projected from 2d screen space to 3d world space 32 //! onto near and far view frustum planes. Thus, the projected triangles make up the bases of 33 //! selecting frustum. When the set of such frustums is created, the function determining 34 //! selection iterates through triangular frustum set and searches for overlap with any 35 //! frustum. 36 class SelectMgr_TriangularFrustumSet : public SelectMgr_BaseFrustum 37 { 38 public: 39 SelectMgr_TriangularFrustumSet()40 SelectMgr_TriangularFrustumSet() {}; 41 ~SelectMgr_TriangularFrustumSet()42 ~SelectMgr_TriangularFrustumSet() {}; 43 44 //! Meshes polygon bounded by polyline. Than organizes a set of triangular frustums, 45 //! where each triangle's projection onto near and far view frustum planes is 46 //! considered as a frustum base 47 Standard_EXPORT virtual void Build (const TColgp_Array1OfPnt2d& thePoints) Standard_OVERRIDE; 48 49 //! Returns a copy of the frustum with all sub-volumes transformed according to the matrix given 50 Standard_EXPORT virtual Handle(SelectMgr_BaseFrustum) ScaleAndTransform (const Standard_Integer theScale, 51 const gp_GTrsf& theTrsf) const Standard_OVERRIDE; 52 53 Standard_EXPORT virtual Standard_Boolean Overlaps (const SelectMgr_Vec3& theMinPnt, 54 const SelectMgr_Vec3& theMaxPnt, 55 const SelectMgr_ViewClipRange& theClipRange, 56 SelectBasics_PickResult& thePickResult) const Standard_OVERRIDE; 57 58 Standard_EXPORT virtual Standard_Boolean Overlaps (const SelectMgr_Vec3& theMinPnt, 59 const SelectMgr_Vec3& theMaxPnt, 60 Standard_Boolean* theInside) const Standard_OVERRIDE; 61 62 Standard_EXPORT virtual Standard_Boolean Overlaps (const gp_Pnt& thePnt, 63 const SelectMgr_ViewClipRange& theClipRange, 64 SelectBasics_PickResult& thePickResult) const Standard_OVERRIDE; 65 66 Standard_EXPORT virtual Standard_Boolean Overlaps (const TColgp_Array1OfPnt& theArrayOfPnts, 67 Select3D_TypeOfSensitivity theSensType, 68 const SelectMgr_ViewClipRange& theClipRange, 69 SelectBasics_PickResult& thePickResult) const Standard_OVERRIDE; 70 71 Standard_EXPORT virtual Standard_Boolean Overlaps (const gp_Pnt& thePnt1, 72 const gp_Pnt& thePnt2, 73 const SelectMgr_ViewClipRange& theClipRange, 74 SelectBasics_PickResult& thePickResult) const Standard_OVERRIDE; 75 76 Standard_EXPORT virtual Standard_Boolean Overlaps (const gp_Pnt& thePnt1, 77 const gp_Pnt& thePnt2, 78 const gp_Pnt& thePnt3, 79 Select3D_TypeOfSensitivity theSensType, 80 const SelectMgr_ViewClipRange& theClipRange, 81 SelectBasics_PickResult& thePickResult) const Standard_OVERRIDE; 82 83 //! Stores plane equation coefficients (in the following form: 84 //! Ax + By + Cz + D = 0) to the given vector 85 Standard_EXPORT virtual void GetPlanes (NCollection_Vector<SelectMgr_Vec4>& thePlaneEquations) const Standard_OVERRIDE; 86 87 private: 88 89 SelectMgr_TriangFrustums myFrustums; 90 }; 91 92 #endif // _SelectMgr_TriangularFrustumSet_HeaderFile 93