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 // Created on: 1997-05-15
 // Created by: Robert COUBLANC
 // Copyright (c) 1997-1999 Matra Datavision
 // Copyright (c) 1999-2014 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 _Select3D_SensitiveTriangulation_Header
 #define _Select3D_SensitiveTriangulation_Header
 
 #include <TColStd_HArray1OfInteger.hxx>
 #include <Select3D_SensitiveSet.hxx>
 
 class Poly_Triangle;
 class Poly_Triangulation;
 
 //! A framework to define selection of a sensitive entity made of a set of triangles.
 class Select3D_SensitiveTriangulation : public Select3D_SensitiveSet
 {
   DEFINE_STANDARD_RTTIEXT(Select3D_SensitiveTriangulation, Select3D_SensitiveSet)
 public:
 
   //! Constructs a sensitive triangulation object defined by
   //! the owner theOwnerId, the triangulation theTrg,
   //! the location theInitLoc, and the flag theIsInterior.
   Standard_EXPORT Select3D_SensitiveTriangulation (const Handle(SelectMgr_EntityOwner)& theOwnerId,
                                                    const Handle(Poly_Triangulation)& theTrg,
                                                    const TopLoc_Location& theInitLoc,
                                                    const Standard_Boolean theIsInterior = Standard_True);
 
   //! Constructs a sensitive triangulation object defined by
   //! the owner theOwnerId, the triangulation theTrg,
   //! the location theInitLoc, the array of free edges
   //! theFreeEdges, the center of gravity theCOG, and the flag theIsInterior.
   //! As free edges and the center of gravity do not have
   //! to be computed later, this syntax reduces computation time.
   Standard_EXPORT Select3D_SensitiveTriangulation (const Handle(SelectMgr_EntityOwner)& theOwnerId,
                                                    const Handle(Poly_Triangulation)& theTrg,
                                                    const TopLoc_Location& theInitLoc,
                                                    const Handle(TColStd_HArray1OfInteger)& theFreeEdges,
                                                    const gp_Pnt& theCOG,
                                                    const Standard_Boolean theIsInterior);
 public:
 
   //! Get last detected triangle.
   //! @param theTriangle [out] triangle node indexes
   //! @return TRUE if defined
   Standard_EXPORT bool LastDetectedTriangle (Poly_Triangle& theTriangle) const;
 
   //! Get last detected triangle.
   //! @param theTriangle [out] triangle node indexes
   //! @param theTriNodes [out] triangle nodes (with pre-applied transformation)
   //! @return TRUE if defined
   Standard_EXPORT bool LastDetectedTriangle (Poly_Triangle& theTriangle,
                                              gp_Pnt theTriNodes[3]) const;
 
   //! Return index of last detected triangle within [1..NbTris] range, or -1 if undefined.
   Standard_Integer LastDetectedTriangleIndex() const
   {
     return (myDetectedIdx != -1 && mySensType == Select3D_TOS_INTERIOR && !myBVHPrimIndexes.IsNull())
           ? myBVHPrimIndexes->Value (myDetectedIdx) + 1
           : -1;
   }
 
 public:
 
   //! Returns the amount of nodes in triangulation
   Standard_EXPORT virtual Standard_Integer NbSubElements() const Standard_OVERRIDE;
 
   Standard_EXPORT Handle(Select3D_SensitiveEntity) GetConnected() Standard_OVERRIDE;
 
   const Handle(Poly_Triangulation)& Triangulation() const { return myTriangul; }
 
   //! Returns the length of array of triangles or edges
   Standard_EXPORT virtual Standard_Integer Size() const Standard_OVERRIDE;
 
   //! Returns bounding box of triangle/edge with index theIdx
   Standard_EXPORT virtual Select3D_BndBox3d Box (const Standard_Integer theIdx) const Standard_OVERRIDE;
 
   //! Returns geometry center of triangle/edge with index theIdx
   //! in array along the given axis theAxis
   Standard_EXPORT virtual Standard_Real Center (const Standard_Integer theIdx,
                                                 const Standard_Integer theAxis) const Standard_OVERRIDE;
 
   //! Swaps items with indexes theIdx1 and theIdx2 in array
   Standard_EXPORT virtual void Swap (const Standard_Integer theIdx1,
                                      const Standard_Integer theIdx2) Standard_OVERRIDE;
 
   //! Returns bounding box of the triangulation. If location
   //! transformation is set, it will be applied
   Standard_EXPORT virtual Select3D_BndBox3d BoundingBox() Standard_OVERRIDE;
 
   //! Returns center of triangulation. If location transformation
   //! is set, it will be applied
   Standard_EXPORT virtual gp_Pnt CenterOfGeometry() const Standard_OVERRIDE;
 
   //! Returns true if the shape corresponding to the entity has init location
   Standard_EXPORT virtual Standard_Boolean HasInitLocation() const Standard_OVERRIDE;
 
   //! Returns inversed location transformation matrix if the shape corresponding
   //! to this entity has init location set. Otherwise, returns identity matrix.
   Standard_EXPORT virtual gp_GTrsf InvInitLocation() const Standard_OVERRIDE;
 
   const TopLoc_Location& GetInitLocation() const { return myInitLocation; }
 
   //! Dumps the content of me into the stream
   Standard_EXPORT virtual void DumpJson (Standard_OStream& theOStream, Standard_Integer theDepth = -1) const Standard_OVERRIDE;
 
   //! Checks whether one or more entities of the set overlap current selecting volume.
   Standard_EXPORT virtual Standard_Boolean Matches (SelectBasics_SelectingVolumeManager& theMgr,
                                                     SelectBasics_PickResult& thePickResult) Standard_OVERRIDE;
 
 protected:
 
   //! Compute bounding box.
   void computeBoundingBox();
 
   //! Inner function for transformation application to bounding
   //! box of the triangulation
   Select3D_BndBox3d applyTransformation();
 
 private:
 
   //! Checks whether the element with index theIdx overlaps the current selecting volume
   Standard_EXPORT virtual Standard_Boolean overlapsElement (SelectBasics_PickResult& thePickResult,
                                                             SelectBasics_SelectingVolumeManager& theMgr,
                                                             Standard_Integer theElemIdx,
                                                             Standard_Boolean theIsFullInside) Standard_OVERRIDE;
 
   //! Calculates distance from the 3d projection of used-picked screen point to center of the geometry
   Standard_EXPORT virtual Standard_Real distanceToCOG (SelectBasics_SelectingVolumeManager& theMgr) Standard_OVERRIDE;
 
   //! Checks whether the entity with index theIdx is inside the current selecting volume
   Standard_EXPORT virtual Standard_Boolean elementIsInside (SelectBasics_SelectingVolumeManager& theMgr,
                                                             Standard_Integer theElemIdx,
                                                             Standard_Boolean theIsFullInside) Standard_OVERRIDE;
 
 protected:
 
   Handle(Poly_Triangulation)       myTriangul;
   TopLoc_Location                  myInitLocation;
   gp_Pnt                           myCDG3D;              //!< Center of the whole triangulation
   Handle(TColStd_HArray1OfInteger) myFreeEdges;
   Standard_Boolean                 mySensType;            //!< Type of sensitivity: boundary or interior
   Standard_Integer                 myPrimitivesNb;       //!< Amount of free edges or triangles depending on sensitivity type
   Handle(TColStd_HArray1OfInteger) myBVHPrimIndexes;     //!< Indexes of edges or triangles for BVH build
   mutable Select3D_BndBox3d        myBndBox;             //!< Bounding box of the whole triangulation
   gp_GTrsf                         myInvInitLocation;
 };
 
 DEFINE_STANDARD_HANDLE(Select3D_SensitiveTriangulation, Select3D_SensitiveSet)
 
 #endif // _Select3D_SensitiveTriangulation_Header

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