src/SelectMgr/SelectMgr_TriangularFrustumSet.hxx

   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
  40   SelectMgr_TriangularFrustumSet() {};
  41
  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                                                      Standard_Real& theDepth) Standard_OVERRIDE;
  56
  57   Standard_EXPORT virtual Standard_Boolean Overlaps (const SelectMgr_Vec3& theMinPnt,
  58                                                      const SelectMgr_Vec3& theMaxPnt,
  59                                                      Standard_Boolean* theInside) Standard_OVERRIDE;
  60
  61   Standard_EXPORT virtual Standard_Boolean Overlaps (const gp_Pnt& thePnt,
  62                                                      Standard_Real& theDepth) Standard_OVERRIDE;
  63
  64   Standard_EXPORT virtual Standard_Boolean Overlaps (const TColgp_Array1OfPnt& theArrayOfPnts,
  65                                                      Select3D_TypeOfSensitivity theSensType,
  66                                                      Standard_Real& theDepth) Standard_OVERRIDE;
  67
  68   Standard_EXPORT virtual Standard_Boolean Overlaps (const gp_Pnt& thePnt1,
  69                                                      const gp_Pnt& thePnt2,
  70                                                      Standard_Real& theDepth) Standard_OVERRIDE;
  71
  72   Standard_EXPORT virtual Standard_Boolean Overlaps (const gp_Pnt& thePnt1,
  73                                                      const gp_Pnt& thePnt2,
  74                                                      const gp_Pnt& thePnt3,
  75                                                      Select3D_TypeOfSensitivity theSensType,
  76                                                      Standard_Real& theDepth) Standard_OVERRIDE;
  77
  78 private:
  79
  80     SelectMgr_TriangFrustums myFrustums;
  81 };
  82
  83 #endif // _SelectMgr_TriangularFrustumSet_HeaderFile