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 // Created on: 2014-05-22
 // Created by: Varvara POSKONINA
 // Copyright (c) 2005-2014 OPEN CASCADE SAS
 //
 // This file is part of Open CASCADE Technology software library.
 //
 // This library is free software; you can redistribute it and/or modify it under
 // the terms of the GNU Lesser General Public License version 2.1 as published
 // by the Free Software Foundation, with special exception defined in the file
 // OCCT_LGPL_EXCEPTION.txt. Consult the file LICENSE_LGPL_21.txt included in OCCT
 // distribution for complete text of the license and disclaimer of any warranty.
 //
 // Alternatively, this file may be used under the terms of Open CASCADE
 // commercial license or contractual agreement.
 
 #ifndef _SelectMgr_TriangularFrustum_HeaderFile
 #define _SelectMgr_TriangularFrustum_HeaderFile
 
 #include <SelectMgr_Frustum.hxx>
 
 //! This class contains representation of triangular selecting frustum, created in case
 //! of polyline selection, and algorithms for overlap detection between selecting frustum and sensitive entities.
 //! Overlap detection tests are implemented according to the terms of separating axis theorem (SAT).
 //! NOTE: the object of this class can be created only as part of SelectMgr_TriangularFrustumSet.
 class SelectMgr_TriangularFrustum : public SelectMgr_Frustum<3>
 {
 public:
 
   //! Auxiliary structure to define selection triangle
   struct SelectionTriangle
   {
     gp_Pnt2d Points[3];
   };
 
 public:
 
   //! Destructor.
   Standard_EXPORT virtual ~SelectMgr_TriangularFrustum();
 
   //! Initializes selection triangle by input points
   Standard_EXPORT void Init (const gp_Pnt2d& theP1,
                              const gp_Pnt2d& theP2,
                              const gp_Pnt2d& theP3);
 
   //! Creates new triangular frustum with bases of triangles with vertices theP1, theP2 and theP3
   //! projections onto near and far view frustum planes (only for triangular frustums)
   //! NOTE: it should be called after Init() method
   Standard_EXPORT virtual void Build() Standard_OVERRIDE;
 
   //! Returns FALSE (not applicable to this volume).
   virtual Standard_Boolean IsScalable() const Standard_OVERRIDE { return false; }
 
   //! Returns a copy of the frustum transformed according to the matrix given
   Standard_EXPORT virtual Handle(SelectMgr_BaseIntersector) ScaleAndTransform (const Standard_Integer theScale,
                                                                                const gp_GTrsf& theTrsf,
                                                                                const Handle(SelectMgr_FrustumBuilder)& theBuilder) const Standard_OVERRIDE;
 
 public: //! @name SAT Tests for different objects
 
   //! SAT intersection test between defined volume and given axis-aligned box
   Standard_EXPORT virtual Standard_Boolean OverlapsBox (const SelectMgr_Vec3& theMinPnt,
                                                         const SelectMgr_Vec3& theMaxPnt,
                                                         const SelectMgr_ViewClipRange& theClipRange,
                                                         SelectBasics_PickResult& thePickResult) const Standard_OVERRIDE;
 
   //! Returns true if selecting volume is overlapped by axis-aligned bounding box
   //! with minimum corner at point theMinPt and maximum at point theMaxPt
   Standard_EXPORT virtual Standard_Boolean OverlapsBox (const SelectMgr_Vec3& theMinPt,
                                                         const SelectMgr_Vec3& theMaxPt,
                                                         Standard_Boolean* theInside) const Standard_OVERRIDE;
 
   //! Intersection test between defined volume and given point
   Standard_EXPORT virtual Standard_Boolean OverlapsPoint (const gp_Pnt& thePnt,
                                                           const SelectMgr_ViewClipRange& theClipRange,
                                                           SelectBasics_PickResult& thePickResult) const Standard_OVERRIDE;
 
   //! Always returns FALSE (not applicable to this selector).
   virtual Standard_Boolean OverlapsPoint (const gp_Pnt& ) const Standard_OVERRIDE
   {
     return Standard_False;
   }
 
   //! SAT intersection test between defined volume and given ordered set of points,
   //! representing line segments. The test may be considered of interior part or
   //! boundary line defined by segments depending on given sensitivity type
   Standard_EXPORT virtual Standard_Boolean OverlapsPolygon (const TColgp_Array1OfPnt& theArrayOfPnts,
                                                             Select3D_TypeOfSensitivity theSensType,
                                                             const SelectMgr_ViewClipRange& theClipRange,
                                                             SelectBasics_PickResult& thePickResult) const Standard_OVERRIDE;
 
   //! Checks if line segment overlaps selecting frustum
   Standard_EXPORT virtual Standard_Boolean OverlapsSegment (const gp_Pnt& thePnt1,
                                                             const gp_Pnt& thePnt2,
                                                             const SelectMgr_ViewClipRange& theClipRange,
                                                             SelectBasics_PickResult& thePickResult) const Standard_OVERRIDE;
 
   //! SAT intersection test between defined volume and given triangle. The test may
   //! be considered of interior part or boundary line defined by triangle vertices
   //! depending on given sensitivity type
   Standard_EXPORT virtual Standard_Boolean OverlapsTriangle (const gp_Pnt& thePnt1,
                                                              const gp_Pnt& thePnt2,
                                                              const gp_Pnt& thePnt3,
                                                              Select3D_TypeOfSensitivity theSensType,
                                                              const SelectMgr_ViewClipRange& theClipRange,
                                                              SelectBasics_PickResult& thePickResult) const Standard_OVERRIDE;
 
   //! Returns true if selecting volume is overlapped by sphere with center theCenter
   //! and radius theRadius
   Standard_EXPORT virtual Standard_Boolean OverlapsSphere (const gp_Pnt& theCenter,
                                                            const Standard_Real theRadius,
                                                            Standard_Boolean* theInside = NULL) const Standard_OVERRIDE;
 
   //! Returns true if selecting volume is overlapped by sphere with center theCenter
   //! and radius theRadius
   Standard_EXPORT virtual Standard_Boolean OverlapsSphere (const gp_Pnt& theCenter,
                                                            const Standard_Real theRadius,
                                                            const SelectMgr_ViewClipRange& theClipRange,
                                                            SelectBasics_PickResult& thePickResult) const Standard_OVERRIDE;
 
   //! Returns true if selecting volume is overlapped by cylinder (or cone) with radiuses theBottomRad
   //! and theTopRad, height theHeight and transformation to apply theTrsf.
   Standard_EXPORT virtual Standard_Boolean OverlapsCylinder (const Standard_Real theBottomRad,
                                                              const Standard_Real theTopRad,
                                                              const Standard_Real theHeight,
                                                              const gp_Trsf& theTrsf,
                                                              const Standard_Boolean theIsHollow,
                                                              const SelectMgr_ViewClipRange& theClipRange,
                                                              SelectBasics_PickResult& thePickResult) const Standard_OVERRIDE;
 
   //! Returns true if selecting volume is overlapped by cylinder (or cone) with radiuses theBottomRad
   //! and theTopRad, height theHeight and transformation to apply theTrsf.
   Standard_EXPORT virtual Standard_Boolean OverlapsCylinder (const Standard_Real theBottomRad,
                                                              const Standard_Real theTopRad,
                                                              const Standard_Real theHeight,
                                                              const gp_Trsf& theTrsf,
                                                              const Standard_Boolean theIsHollow,
                                                              Standard_Boolean* theInside = NULL) const Standard_OVERRIDE;
 
   //! Returns true if selecting volume is overlapped by circle with radius theRadius,
   //! boolean theIsFilled and transformation to apply theTrsf.
   //! The position and orientation of the circle are specified
   //! via theTrsf transformation for gp::XOY() with center in gp::Origin().
   Standard_EXPORT virtual Standard_Boolean OverlapsCircle (const Standard_Real theRadius,
                                                            const gp_Trsf& theTrsf,
                                                            const Standard_Boolean theIsFilled,
                                                            const SelectMgr_ViewClipRange& theClipRange,
                                                            SelectBasics_PickResult& thePickResult) const Standard_OVERRIDE;
 
   //! Returns true if selecting volume is overlapped by circle with radius theRadius,
   //! boolean theIsFilled and transformation to apply theTrsf.
   //! The position and orientation of the circle are specified
   //! via theTrsf transformation for gp::XOY() with center in gp::Origin().
   Standard_EXPORT virtual Standard_Boolean OverlapsCircle (const Standard_Real theRadius,
                                                            const gp_Trsf& theTrsf,
                                                            const Standard_Boolean theIsFilled,
                                                            Standard_Boolean* theInside = NULL) const Standard_OVERRIDE;
 
 public:
 
   //! Nullifies the handle to corresponding builder instance to prevent memory leaks
   Standard_EXPORT void Clear();
 
   //! Stores plane equation coefficients (in the following form:
   //! Ax + By + Cz + D = 0) to the given vector
   Standard_EXPORT virtual void GetPlanes (NCollection_Vector<SelectMgr_Vec4>& thePlaneEquations) const Standard_OVERRIDE;
 
   //! Dumps the content of me into the stream
   Standard_EXPORT virtual void DumpJson (Standard_OStream& theOStream, Standard_Integer theDepth = -1) const Standard_OVERRIDE;
 
 protected:
 
   //! Creates an empty triangular frustum.
   Standard_EXPORT SelectMgr_TriangularFrustum();
 
 private:
 
   void cacheVertexProjections (SelectMgr_TriangularFrustum* theFrustum) const;
 
 protected:
 
   SelectionTriangle mySelTriangle; //!< parameters of selection triangle (it is used to build triangle frustum)
 
 public:
 
   DEFINE_STANDARD_RTTIEXT(SelectMgr_TriangularFrustum, SelectMgr_Frustum<3>)
   friend class SelectMgr_TriangularFrustumSet;
 };
 
 #endif // _SelectMgr_TriangularFrustum_HeaderFile

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