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 // Created on: 2015-02-18
 // Created by: Nikolai BUKHALOV
 // Copyright (c) 1992-1999 Matra Datavision
 // Copyright (c) 1999-2015 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 _IntPatch_PointLine_HeaderFile
 #define _IntPatch_PointLine_HeaderFile
 
 #include <Adaptor3d_Surface.hxx>
 #include <IntPatch_Line.hxx>
 
 class gp_Pnt;
 class gp_Pnt2d;
 class IntSurf_PntOn2S;
 class IntSurf_LineOn2S;
 class IntPatch_Point;
 
 //! Definition of an intersection line between two
 //! surfaces.
 //! A line defined by a set of points
 //! (e.g. coming from a walking algorithm) as
 //! defined in the class WLine or RLine (Restriction line).
 class IntPatch_PointLine : public IntPatch_Line
 {
 public:
   //! Adds a vertex in the list. If theIsPrepend == TRUE the new
   //! vertex will be added before the first element of vertices sequence.
   //! Otherwise, to the end of the sequence
   Standard_EXPORT virtual void AddVertex(const IntPatch_Point& Pnt,
                                          const bool            theIsPrepend = false) = 0;
 
   //! Returns the number of intersection points.
   Standard_EXPORT virtual int NbPnts() const = 0;
 
   //! Returns number of vertices (IntPatch_Point) of the line
   Standard_EXPORT virtual int NbVertex() const = 0;
 
   //! Returns the intersection point of range Index.
   Standard_EXPORT virtual const IntSurf_PntOn2S& Point(const int Index) const = 0;
 
   //! Returns the vertex of range Index on the line.
   Standard_EXPORT virtual const IntPatch_Point& Vertex(const int Index) const = 0;
 
   //! Returns the vertex of range Index on the line.
   virtual IntPatch_Point& ChangeVertex(const int Index) = 0;
 
   //! Removes vertices from the line
   Standard_EXPORT virtual void ClearVertexes() = 0;
 
   //! Removes single vertex from the line
   Standard_EXPORT virtual void RemoveVertex(const int theIndex) = 0;
 
   //! Returns set of intersection points
   Standard_EXPORT virtual occ::handle<IntSurf_LineOn2S> Curve() const = 0;
 
   //! Returns TRUE if P1 is out of the box built from
   //! the points on 1st surface
   Standard_EXPORT virtual bool IsOutSurf1Box(const gp_Pnt2d& P1) const = 0;
 
   //! Returns TRUE if P2 is out of the box built from
   //! the points on 2nd surface
   Standard_EXPORT virtual bool IsOutSurf2Box(const gp_Pnt2d& P2) const = 0;
 
   //! Returns TRUE if P is out of the box built from 3D-points.
   Standard_EXPORT virtual bool IsOutBox(const gp_Pnt& P) const = 0;
 
   //! Returns the radius of curvature of
   //! the intersection line in given point.
   //! Returns negative value if computation is not possible.
   Standard_EXPORT static double CurvatureRadiusOfIntersLine(
     const occ::handle<Adaptor3d_Surface>& theS1,
     const occ::handle<Adaptor3d_Surface>& theS2,
     const IntSurf_PntOn2S&                theUVPoint);
 
   DEFINE_STANDARD_RTTIEXT(IntPatch_PointLine, IntPatch_Line)
 
 protected:
   //! To initialize the fields, when the transitions
   //! are In or Out.
   Standard_EXPORT IntPatch_PointLine(const bool              Tang,
                                      const IntSurf_TypeTrans Trans1,
                                      const IntSurf_TypeTrans Trans2);
 
   //! To initialize the fields, when the transitions
   //! are Touch.
   Standard_EXPORT IntPatch_PointLine(const bool              Tang,
                                      const IntSurf_Situation Situ1,
                                      const IntSurf_Situation Situ2);
 
   //! To initialize the fields, when the transitions
   //! are Undecided.
   Standard_EXPORT IntPatch_PointLine(const bool Tang);
 };
 
 #endif // _IntPatch_PointLine_HeaderFile

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