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 // Created on: 1992-05-06
 // Created by: Jacques GOUSSARD
 // Copyright (c) 1992-1999 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_Point_HeaderFile
 #define _IntPatch_Point_HeaderFile
 
 #include <Standard.hxx>
 #include <Standard_DefineAlloc.hxx>
 #include <Standard_Handle.hxx>
 
 #include <IntSurf_PntOn2S.hxx>
 #include <IntSurf_Transition.hxx>
 #include <Adaptor2d_Curve2d.hxx>
 
 class Adaptor3d_HVertex;
 class gp_Pnt;
 
 //! Definition of an intersection point between two surfaces.
 //! Such a point is contains geometrical information (see
 //! the Value method) and logical information.
 class IntPatch_Point
 {
 public:
   DEFINE_STANDARD_ALLOC
 
   //! Empty constructor.
   IntPatch_Point();
 
   //! Sets the values of a point which is on no domain,
   //! when both surfaces are implicit ones.
   //! If Tangent is True, the point is a point of tangency
   //! between the surfaces.
   Standard_EXPORT void SetValue(const gp_Pnt& Pt, const double Tol, const bool Tangent);
 
   void SetValue(const gp_Pnt& Pt);
 
   //! Sets the value of <pt> member
   void SetValue(const IntSurf_PntOn2S& thePOn2S);
 
   void SetTolerance(const double Tol);
 
   //! Sets the values of the parameters of the point
   //! on each surface.
   void SetParameters(const double U1, const double V1, const double U2, const double V2);
 
   //! Set the value of the parameter on the intersection line.
   void SetParameter(const double Para);
 
   //! Sets the values of a point which is a vertex on
   //! the initial facet of restriction of one
   //! of the surface.
   //! If OnFirst is True, the point is on the domain of the
   //! first patch, otherwise the point is on the domain of the
   //! second surface.
   Standard_EXPORT void SetVertex(const bool OnFirst, const occ::handle<Adaptor3d_HVertex>& V);
 
   //! Sets the values of a point which is on one of the domain,
   //! when both surfaces are implicit ones.
   //! If OnFirst is True, the point is on the domain of the
   //! first patch, otherwise the point is on the domain of the
   //! second surface.
   Standard_EXPORT void SetArc(const bool                            OnFirst,
                               const occ::handle<Adaptor2d_Curve2d>& A,
                               const double                          Param,
                               const IntSurf_Transition&             TLine,
                               const IntSurf_Transition&             TArc);
 
   //! Sets (or unsets) the point as a point on several
   //! intersection line.
   void SetMultiple(const bool IsMult);
 
   //! Returns the intersection point (geometric information).
   const gp_Pnt& Value() const;
 
   //! This method returns the parameter of the point
   //! on the intersection line.
   //! If the points does not belong to an intersection line,
   //! the value returned does not have any sens.
   double ParameterOnLine() const;
 
   //! This method returns the fuzziness on the point.
   double Tolerance() const;
 
   //! Returns True if the Point is a tangency point between
   //! the surfaces.
   //! If the Point is on one of the domain (IsOnDomS1 returns
   //! True or IsOnDomS2 returns True), an exception is raised.
   bool IsTangencyPoint() const;
 
   //! Returns the parameters on the first surface of the point.
   void ParametersOnS1(double& U1, double& V1) const;
 
   //! Returns the parameters on the second surface of the point.
   void ParametersOnS2(double& U2, double& V2) const;
 
   //! Returns True if the point belongs to several intersection
   //! lines.
   bool IsMultiple() const;
 
   //! Returns TRUE if the point is on a boundary of the domain
   //! of the first patch.
   bool IsOnDomS1() const;
 
   //! Returns TRUE if the point is a vertex on the initial
   //! restriction facet of the first surface.
   bool IsVertexOnS1() const;
 
   //! Returns the information about the point when it is
   //! on the domain of the first patch, i-e when the function
   //! IsVertexOnS1 returns True.
   //! Otherwise, an exception is raised.
   const occ::handle<Adaptor3d_HVertex>& VertexOnS1() const;
 
   //! Returns the arc of restriction containing the
   //! vertex.
   //! The exception DomainError is raised if
   //! IsOnDomS1 returns False.
   const occ::handle<Adaptor2d_Curve2d>& ArcOnS1() const;
 
   //! Returns the transition of the point on the
   //! intersection line with the arc on S1.
   //! The exception DomainError is raised if IsOnDomS1
   //! returns False.
   const IntSurf_Transition& TransitionLineArc1() const;
 
   //! Returns the transition between the intersection line
   //! returned by the method Line and the arc on S1 returned
   //! by ArcOnS1().
   //! The exception DomainError is raised if
   //! IsOnDomS1 returns False.
   const IntSurf_Transition& TransitionOnS1() const;
 
   //! Returns the parameter of the point on the
   //! arc returned by the method ArcOnS2.
   //! The exception DomainError is raised if
   //! IsOnDomS1 returns False.
   double ParameterOnArc1() const;
 
   //! Returns TRUE if the point is on a boundary of the domain
   //! of the second patch.
   bool IsOnDomS2() const;
 
   //! Returns TRUE if the point is a vertex on the initial
   //! restriction facet of the first surface.
   bool IsVertexOnS2() const;
 
   //! Returns the information about the point when it is
   //! on the domain of the second patch, i-e when the function
   //! IsVertexOnS2 returns True.
   //! Otherwise, an exception is raised.
   const occ::handle<Adaptor3d_HVertex>& VertexOnS2() const;
 
   //! Returns the arc of restriction containing the
   //! vertex.
   //! The exception DomainError is raised if
   //! IsOnDomS2 returns False.
   const occ::handle<Adaptor2d_Curve2d>& ArcOnS2() const;
 
   //! Returns the transition of the point on the
   //! intersection line with the arc on S2.
   //! The exception DomainError is raised if IsOnDomS2
   //! returns False.
   const IntSurf_Transition& TransitionLineArc2() const;
 
   //! Returns the transition between the intersection line
   //! returned by the method Line and the arc on S2 returned
   //! by ArcOnS2.
   //! The exception DomainError is raised if
   //! IsOnDomS2 returns False.
   const IntSurf_Transition& TransitionOnS2() const;
 
   //! Returns the parameter of the point on the
   //! arc returned by the method ArcOnS2.
   //! The exception DomainError is raised if
   //! IsOnDomS2 returns False.
   double ParameterOnArc2() const;
 
   //! Returns the PntOn2S
   //! (geometric Point and the parameters)
   const IntSurf_PntOn2S& PntOn2S() const;
 
   //! Returns the parameters on the first and on the
   //! second surface of the point.
   void Parameters(double& U1, double& V1, double& U2, double& V2) const;
 
   Standard_EXPORT void ReverseTransition();
 
   Standard_EXPORT void Dump() const;
 
 private:
   IntSurf_PntOn2S pt;
   double          para;
   double          tol;
   bool            tgt;
 
   // TRUE if the point is in several intersection lines
   bool mult;
 
   bool                           onS1;
   bool                           vtxonS1;
   occ::handle<Adaptor3d_HVertex> vS1;
   occ::handle<Adaptor2d_Curve2d> arcS1;
   IntSurf_Transition             traline1;
   IntSurf_Transition             tra1;
   double                         prm1;
   bool                           onS2;
   bool                           vtxonS2;
   occ::handle<Adaptor3d_HVertex> vS2;
   occ::handle<Adaptor2d_Curve2d> arcS2;
   IntSurf_Transition             traline2;
   IntSurf_Transition             tra2;
   double                         prm2;
 };
 
 #include <IntPatch_Point.lxx>
 
 #endif // _IntPatch_Point_HeaderFile

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