// This file is generated by WOK (CPPExt).
// Please do not edit this file; modify original file instead.
// The copyright and license terms as defined for the original file apply to 
// this header file considered to be the "object code" form of the original source.

#ifndef _Geom2dAPI_ProjectPointOnCurve_HeaderFile
#define _Geom2dAPI_ProjectPointOnCurve_HeaderFile

#include <Standard.hxx>
#include <Standard_DefineAlloc.hxx>
#include <Standard_Macro.hxx>

#include <Standard_Boolean.hxx>
#include <Standard_Integer.hxx>
#include <Extrema_ExtPC2d.hxx>
#include <Geom2dAdaptor_Curve.hxx>
#include <Handle_Geom2d_Curve.hxx>
#include <Quantity_Parameter.hxx>
#include <Quantity_Length.hxx>
class Standard_OutOfRange;
class StdFail_NotDone;
class gp_Pnt2d;
class Geom2d_Curve;
class Extrema_ExtPC2d;



//! This class implements methods for computing all the orthogonal
//! projections of a 2D point onto a 2D curve.
class Geom2dAPI_ProjectPointOnCurve 
{
public:

  DEFINE_STANDARD_ALLOC

  
  //! Constructs an empty projector algorithm. Use an Init
  //! function to define the point and the curve on which it is going to work.
  Standard_EXPORT Geom2dAPI_ProjectPointOnCurve();
  
  //! Create the projection  of a  point  <P> on a curve
  //! <Curve>
  Standard_EXPORT Geom2dAPI_ProjectPointOnCurve(const gp_Pnt2d& P, const Handle(Geom2d_Curve)& Curve);
  
  //! Create  the projection  of a point <P>  on a curve
  //! <Curve> limited by the two   points of parameter Umin and Usup.
  //! Warning
  //! Use the function NbPoints to obtain the number of solutions. If
  //! projection fails, NbPoints returns 0.
  Standard_EXPORT Geom2dAPI_ProjectPointOnCurve(const gp_Pnt2d& P, const Handle(Geom2d_Curve)& Curve, const Quantity_Parameter Umin, const Quantity_Parameter Usup);
  
  //! Initializes this algorithm with the given arguments, and
  //! computes the orthogonal  projections  of a  point  <P> on a curve <Curve>
  Standard_EXPORT   void Init (const gp_Pnt2d& P, const Handle(Geom2d_Curve)& Curve) ;
  
  //! Initializes this algorithm with the given arguments, and
  //! computes the orthogonal projections of the point P onto the portion
  //! of the curve Curve limited by the two points of parameter Umin and Usup.
  Standard_EXPORT   void Init (const gp_Pnt2d& P, const Handle(Geom2d_Curve)& Curve, const Quantity_Parameter Umin, const Quantity_Parameter Usup) ;
  
  //! return the number of of computed
  //! orthogonal projectionn points.
  Standard_EXPORT   Standard_Integer NbPoints()  const;
Standard_EXPORT operator Standard_Integer() const;
  
  //! Returns the orthogonal projection
  //! on the curve. Index is a number of a computed point.
  //! Exceptions
  //! Standard_OutOfRange if Index is not in the range [ 1,NbPoints ], where
  //! NbPoints is the number of solution points.
  Standard_EXPORT   gp_Pnt2d Point (const Standard_Integer Index)  const;
  
  //! Returns the parameter on the curve
  //! of a point which is the orthogonal projection. Index is a number of a
  //! computed projected point.
  //! Exceptions
  //! Standard_OutOfRange if Index is not in the range [ 1,NbPoints ], where
  //! NbPoints is the number of solution points.
  Standard_EXPORT   Quantity_Parameter Parameter (const Standard_Integer Index)  const;
  
  //! Returns the parameter on the curve
  //! of a point which is the orthogonal projection. Index is a number of a
  //! computed projected point.
  //! Exceptions
  //! Standard_OutOfRange if Index is not in the range [ 1,NbPoints ], where
  //! NbPoints is the number of solution points
  Standard_EXPORT   void Parameter (const Standard_Integer Index, Quantity_Parameter& U)  const;
  
  //! Computes the distance between the
  //! point and its computed orthogonal projection on the curve. Index is a
  //! number of computed projected point.
  //! Exceptions
  //! Standard_OutOfRange if Index is not in the range [ 1,NbPoints ], where
  //! NbPoints is the number of solution points.
  Standard_EXPORT   Quantity_Length Distance (const Standard_Integer Index)  const;
  
  //! Returns the nearest orthogonal projection of the point on the curve.
  //! Exceptions
  //! StdFail_NotDone if this algorithm fails.
  Standard_EXPORT   gp_Pnt2d NearestPoint()  const;
Standard_EXPORT operator gp_Pnt2d() const;
  
  //! Returns the parameter on the curve
  //! of the nearest orthogonal projection of the point.
  //! Exceptions
  //! StdFail_NotDone if this algorithm fails.
  Standard_EXPORT   Quantity_Parameter LowerDistanceParameter()  const;
  
  //! Computes the distance between the
  //! point and its nearest orthogonal projection on the curve.
  //! Exceptions
  //! StdFail_NotDone if this algorithm fails.
  Standard_EXPORT   Quantity_Length LowerDistance()  const;
Standard_EXPORT operator Standard_Real() const;
  
  //! return the algorithmic object from Extrema
     const  Extrema_ExtPC2d& Extrema()  const;




protected:





private:



  Standard_Boolean myIsDone;
  Standard_Integer myIndex;
  Extrema_ExtPC2d myExtPC;
  Geom2dAdaptor_Curve myC;


};


#include <Geom2dAPI_ProjectPointOnCurve.lxx>





#endif // _Geom2dAPI_ProjectPointOnCurve_HeaderFile
