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 // Created on: 1993-08-25
 // Created by: Bruno DUMORTIER
 // Copyright (c) 1993-1999 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 _GeomProjLib_HeaderFile
 #define _GeomProjLib_HeaderFile
 
 #include <Standard.hxx>
 #include <Standard_DefineAlloc.hxx>
 #include <Standard_Handle.hxx>
 
 #include <Standard_Real.hxx>
 #include <Standard_Boolean.hxx>
 class Geom2d_Curve;
 class Geom_Curve;
 class Geom_Surface;
 class Geom_Plane;
 class gp_Dir;
 
 
 //! Projection of a curve on a surface.
 class GeomProjLib 
 {
 public:
 
   DEFINE_STANDARD_ALLOC
 
   
   //! gives  the 2d-curve   of  a 3d-curve  lying on   a
   //! surface (  uses GeomProjLib_ProjectedCurve   )
   //! The 3dCurve is taken between the parametrization
   //! range [First, Last]
   //! <Tolerance> is used as input if the projection needs
   //! an approximation. In this case, the reached
   //! tolerance is set in <Tolerance> as output.
   //! WARNING :  if   the projection has  failed,   this
   //! method returns a null Handle.
   Standard_EXPORT static Handle(Geom2d_Curve) Curve2d (const Handle(Geom_Curve)& C, const Standard_Real First, const Standard_Real Last, const Handle(Geom_Surface)& S, const Standard_Real UFirst, const Standard_Real ULast, const Standard_Real VFirst, const Standard_Real VLast, Standard_Real& Tolerance);
   
   //! gives  the 2d-curve   of  a 3d-curve  lying on   a
   //! surface (  uses GeomProjLib_ProjectedCurve   )
   //! The 3dCurve is taken between the parametrization
   //! range [First, Last]
   //! <Tolerance> is used as input if the projection needs
   //! an approximation. In this case, the reached
   //! tolerance is set in <Tolerance> as output.
   //! WARNING :  if   the projection has  failed,   this
   //! method returns a null Handle.
   Standard_EXPORT static Handle(Geom2d_Curve) Curve2d (const Handle(Geom_Curve)& C, const Standard_Real First, const Standard_Real Last, const Handle(Geom_Surface)& S, Standard_Real& Tolerance);
   
   //! gives  the 2d-curve   of  a 3d-curve  lying on   a
   //! surface (  uses GeomProjLib_ProjectedCurve   )
   //! The 3dCurve is taken between the parametrization
   //! range [First, Last]
   //! If the projection needs an approximation,
   //! Precision::PApproximation() is used.
   //! WARNING :  if   the projection has  failed,   this
   //! method returns a null Handle.
   Standard_EXPORT static Handle(Geom2d_Curve) Curve2d (const Handle(Geom_Curve)& C, const Standard_Real First, const Standard_Real Last, const Handle(Geom_Surface)& S);
   
   //! gives  the  2d-curve  of  a  3d-curve lying   on a
   //! surface   ( uses   GeomProjLib_ProjectedCurve ).
   //! If the projection needs an approximation,
   //! Precision::PApproximation() is used.
   //! WARNING  :  if the   projection has  failed,  this
   //! method returns a null Handle.
   Standard_EXPORT static Handle(Geom2d_Curve) Curve2d (const Handle(Geom_Curve)& C, const Handle(Geom_Surface)& S);
   
   //! gives  the  2d-curve  of  a  3d-curve lying   on a
   //! surface   ( uses   GeomProjLib_ProjectedCurve ).
   //! If the projection needs an approximation,
   //! Precision::PApproximation() is used.
   //! WARNING  :  if the   projection has  failed,  this
   //! method returns a null Handle.
   //! can expand a little the bounds of surface
   Standard_EXPORT static Handle(Geom2d_Curve) Curve2d (const Handle(Geom_Curve)& C, const Handle(Geom_Surface)& S, const Standard_Real UDeb, const Standard_Real UFin, const Standard_Real VDeb, const Standard_Real VFin);
   
   //! gives  the  2d-curve  of  a  3d-curve lying   on a
   //! surface   ( uses   GeomProjLib_ProjectedCurve ).
   //! If the projection needs an approximation,
   //! Precision::PApproximation() is used.
   //! WARNING  :  if the   projection has  failed,  this
   //! method returns a null Handle.
   //! can expand a little the bounds of surface
   Standard_EXPORT static Handle(Geom2d_Curve) Curve2d (const Handle(Geom_Curve)& C, const Handle(Geom_Surface)& S, const Standard_Real UDeb, const Standard_Real UFin, const Standard_Real VDeb, const Standard_Real VFin, Standard_Real& Tolerance);
   
   //! Constructs   the  3d-curve  from the normal
   //! projection  of the  Curve <C> on  the surface <S>.
   //! WARNING : if the  projection has failed, returns  a
   //! null Handle.
   Standard_EXPORT static Handle(Geom_Curve) Project (const Handle(Geom_Curve)& C, const Handle(Geom_Surface)& S);
   
   //! Constructs  the 3d-curves from the projection
   //! of the  curve  <Curve> on the  plane <Plane> along
   //! the direction <Dir>.
   //! If <KeepParametrization> is true, the parametrization
   //! of the Projected Curve <PC> will be  the same as  the
   //! parametrization of the initial curve <C>.
   //! It means: proj(C(u)) = PC(u) for each u.
   //! Otherwise, the parametrization may change.
   Standard_EXPORT static Handle(Geom_Curve) ProjectOnPlane (const Handle(Geom_Curve)& Curve, const Handle(Geom_Plane)& Plane, const gp_Dir& Dir, const Standard_Boolean KeepParametrization);
 
 
 
 
 protected:
 
 
 
 
 
 private:
 
 
 
 
 
 };
 
 
 
 
 
 
 
 #endif // _GeomProjLib_HeaderFile

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