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 // Created on: 1995-07-02
 // Created by: Laurent BUCHARD
 // Copyright (c) 1995-1999 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 _IntPatch_HInterTool_HeaderFile
 #define _IntPatch_HInterTool_HeaderFile
 
 #include <Adaptor2d_Curve2d.hxx>
 #include <Adaptor3d_Surface.hxx>
 
 class gp_Pnt2d;
 class Adaptor3d_HVertex;
 class gp_Pnt;
 
 //! Tool for the intersection between 2 surfaces.
 //! Regroupe pour l instant les methodes hors Adaptor3d...
 class IntPatch_HInterTool
 {
 public:
   DEFINE_STANDARD_ALLOC
 
   Standard_EXPORT IntPatch_HInterTool();
 
   static Standard_Boolean SingularOnUMin(const Handle(Adaptor3d_Surface)& S);
 
   static Standard_Boolean SingularOnUMax(const Handle(Adaptor3d_Surface)& S);
 
   static Standard_Boolean SingularOnVMin(const Handle(Adaptor3d_Surface)& S);
 
   static Standard_Boolean SingularOnVMax(const Handle(Adaptor3d_Surface)& S);
 
   Standard_EXPORT static Standard_Integer NbSamplesU(const Handle(Adaptor3d_Surface)& S,
                                                      const Standard_Real              u1,
                                                      const Standard_Real              u2);
 
   Standard_EXPORT static Standard_Integer NbSamplesV(const Handle(Adaptor3d_Surface)& S,
                                                      const Standard_Real              v1,
                                                      const Standard_Real              v2);
 
   Standard_EXPORT Standard_Integer NbSamplePoints(const Handle(Adaptor3d_Surface)& S);
 
   Standard_EXPORT void SamplePoint(const Handle(Adaptor3d_Surface)& S,
                                    const Standard_Integer           Index,
                                    Standard_Real&                   U,
                                    Standard_Real&                   V) const;
 
   //! Returns True if all the intersection point and edges
   //! are known on the Arc.
   //! The intersection point are given as vertices.
   //! The intersection edges are given as intervals between
   //! two vertices.
   Standard_EXPORT static Standard_Boolean HasBeenSeen(const Handle(Adaptor2d_Curve2d)& C);
 
   //! returns the number of points which is used to make
   //! a sample on the arc. this number is a function of
   //! the Surface and the CurveOnSurface complexity.
   Standard_EXPORT static Standard_Integer NbSamplesOnArc(const Handle(Adaptor2d_Curve2d)& A);
 
   //! Returns the parametric limits on the arc C.
   //! These limits must be finite : they are either
   //! the real limits of the arc, for a finite arc,
   //! or a bounding box for an infinite arc.
   Standard_EXPORT static void Bounds(const Handle(Adaptor2d_Curve2d)& C,
                                      Standard_Real&                   Ufirst,
                                      Standard_Real&                   Ulast);
 
   //! Projects the point P on the arc C.
   //! If the methods returns Standard_True, the projection is
   //! successful, and Paramproj is the parameter on the arc
   //! of the projected point, Ptproj is the projected Point.
   //! If the method returns Standard_False, Param proj and Ptproj
   //! are not significant.
   Standard_EXPORT static Standard_Boolean Project(const Handle(Adaptor2d_Curve2d)& C,
                                                   const gp_Pnt2d&                  P,
                                                   Standard_Real&                   Paramproj,
                                                   gp_Pnt2d&                        Ptproj);
 
   //! Returns the parametric tolerance used to consider
   //! that the vertex and another point meet, i-e
   //! if Abs(parameter(Vertex) - parameter(OtherPnt))<=
   //! Tolerance, the points are "merged".
   Standard_EXPORT static Standard_Real Tolerance(const Handle(Adaptor3d_HVertex)& V,
                                                  const Handle(Adaptor2d_Curve2d)& C);
 
   //! Returns the parameter of the vertex V on the arc A.
   Standard_EXPORT static Standard_Real Parameter(const Handle(Adaptor3d_HVertex)& V,
                                                  const Handle(Adaptor2d_Curve2d)& C);
 
   //! Returns the number of intersection points on the arc A.
   Standard_EXPORT static Standard_Integer NbPoints(const Handle(Adaptor2d_Curve2d)& C);
 
   //! Returns the value (Pt), the tolerance (Tol), and
   //! the parameter (U) on the arc A , of the intersection
   //! point of range Index.
   Standard_EXPORT static void Value(const Handle(Adaptor2d_Curve2d)& C,
                                     const Standard_Integer           Index,
                                     gp_Pnt&                          Pt,
                                     Standard_Real&                   Tol,
                                     Standard_Real&                   U);
 
   //! Returns True if the intersection point of range Index
   //! corresponds with a vertex on the arc A.
   Standard_EXPORT static Standard_Boolean IsVertex(const Handle(Adaptor2d_Curve2d)& C,
                                                    const Standard_Integer           Index);
 
   //! When IsVertex returns True, this method returns the
   //! vertex on the arc A.
   Standard_EXPORT static void Vertex(const Handle(Adaptor2d_Curve2d)& C,
                                      const Standard_Integer           Index,
                                      Handle(Adaptor3d_HVertex)&       V);
 
   //! returns the number of part of A solution of the
   //! of intersection problem.
   Standard_EXPORT static Standard_Integer NbSegments(const Handle(Adaptor2d_Curve2d)& C);
 
   //! Returns True when the segment of range Index is not
   //! open at the left side. In that case, IndFirst is the
   //! range in the list intersection points (see NbPoints)
   //! of the one which defines the left bound of the segment.
   //! Otherwise, the method has to return False, and IndFirst
   //! has no meaning.
   Standard_EXPORT static Standard_Boolean HasFirstPoint(const Handle(Adaptor2d_Curve2d)& C,
                                                         const Standard_Integer           Index,
                                                         Standard_Integer&                IndFirst);
 
   //! Returns True when the segment of range Index is not
   //! open at the right side. In that case, IndLast is the
   //! range in the list intersection points (see NbPoints)
   //! of the one which defines the right bound of the segment.
   //! Otherwise, the method has to return False, and IndLast
   //! has no meaning.
   Standard_EXPORT static Standard_Boolean HasLastPoint(const Handle(Adaptor2d_Curve2d)& C,
                                                        const Standard_Integer           Index,
                                                        Standard_Integer&                IndLast);
 
   //! Returns True when the whole restriction is solution
   //! of the intersection problem.
   Standard_EXPORT static Standard_Boolean IsAllSolution(const Handle(Adaptor2d_Curve2d)& C);
 
 protected:
 private:
   Standard_Real uinf;
   Standard_Real vinf;
   Standard_Real usup;
   Standard_Real vsup;
 };
 
 #include <IntPatch_HInterTool.lxx>
 
 #endif // _IntPatch_HInterTool_HeaderFile

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