// Created on: 1991-07-15
// Created by: Isabelle GRIGNON
// Copyright (c) 1991-1999 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 _CPnts_AbscissaPoint_HeaderFile
#define _CPnts_AbscissaPoint_HeaderFile

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

#include <Standard_Boolean.hxx>
#include <Standard_Real.hxx>
#include <CPnts_MyRootFunction.hxx>
class Adaptor3d_Curve;
class Adaptor2d_Curve2d;


//! the algorithm computes a point on a curve at a given
//! distance from another point on the curve
//!
//! We can instantiates with
//! Curve from Adaptor3d, Pnt from gp, Vec from gp
//!
//! or
//! Curve2d from Adaptor2d, Pnt2d from gp, Vec2d from gp
class CPnts_AbscissaPoint 
{
public:

  DEFINE_STANDARD_ALLOC

  
  //! Computes the length of the Curve <C>.
  Standard_EXPORT static Standard_Real Length (const Adaptor3d_Curve& C);
  
  //! Computes the length of the Curve <C>.
  Standard_EXPORT static Standard_Real Length (const Adaptor2d_Curve2d& C);
  
  //! Computes the length of the Curve <C> with the given tolerance.
  Standard_EXPORT static Standard_Real Length (const Adaptor3d_Curve& C, const Standard_Real Tol);
  
  //! Computes the length of the Curve <C> with the given tolerance.
  Standard_EXPORT static Standard_Real Length (const Adaptor2d_Curve2d& C, const Standard_Real Tol);
  
  //! Computes the length of the Curve <C> between <U1> and <U2>.
  Standard_EXPORT static Standard_Real Length (const Adaptor3d_Curve& C, const Standard_Real U1, const Standard_Real U2);
  
  //! Computes the length of the Curve <C> between <U1> and <U2>.
  Standard_EXPORT static Standard_Real Length (const Adaptor2d_Curve2d& C, const Standard_Real U1, const Standard_Real U2);
  
  //! Computes the length of the Curve <C> between <U1> and <U2> with the given tolerance.
  Standard_EXPORT static Standard_Real Length (const Adaptor3d_Curve& C, const Standard_Real U1, const Standard_Real U2, const Standard_Real Tol);
  
  //! Computes the length of the Curve <C> between <U1> and <U2> with the given tolerance.
  //! creation of a indefinite AbscissaPoint.
  Standard_EXPORT static Standard_Real Length (const Adaptor2d_Curve2d& C, const Standard_Real U1, const Standard_Real U2, const Standard_Real Tol);
  
  Standard_EXPORT CPnts_AbscissaPoint();
  
  //! the algorithm computes a point on a curve <Curve> at the
  //! distance <Abscissa> from the point of parameter <U0>.
  //! <Resolution> is the error allowed in the computation.
  //! The computed point can be outside of the curve 's bounds.
  Standard_EXPORT CPnts_AbscissaPoint(const Adaptor3d_Curve& C, const Standard_Real Abscissa, const Standard_Real U0, const Standard_Real Resolution);
  
  //! the algorithm computes a point on a curve <Curve> at the
  //! distance <Abscissa> from the point of parameter <U0>.
  //! <Resolution> is the error allowed in the computation.
  //! The computed point can be outside of the curve 's bounds.
  Standard_EXPORT CPnts_AbscissaPoint(const Adaptor2d_Curve2d& C, const Standard_Real Abscissa, const Standard_Real U0, const Standard_Real Resolution);
  
  //! the algorithm computes a point on a curve <Curve> at the
  //! distance <Abscissa> from the point of parameter <U0>.
  //! <Ui> is the starting value used in the iterative process
  //! which find the solution, it must be closed to the final
  //! solution
  //! <Resolution> is the error allowed in the computation.
  //! The computed point can be outside of the curve 's bounds.
  Standard_EXPORT CPnts_AbscissaPoint(const Adaptor3d_Curve& C, const Standard_Real Abscissa, const Standard_Real U0, const Standard_Real Ui, const Standard_Real Resolution);
  
  //! the algorithm computes a point on a curve <Curve> at the
  //! distance <Abscissa> from the point of parameter <U0>.
  //! <Ui> is the starting value used in the iterative process
  //! which find the solution, it must be closed to the final
  //! solution
  //! <Resolution> is the error allowed in the computation.
  //! The computed point can be outside of the curve 's bounds.
  Standard_EXPORT CPnts_AbscissaPoint(const Adaptor2d_Curve2d& C, const Standard_Real Abscissa, const Standard_Real U0, const Standard_Real Ui, const Standard_Real Resolution);
  
  //! Initializes the resolution function with <C>.
  Standard_EXPORT void Init (const Adaptor3d_Curve& C);
  
  //! Initializes the resolution function with <C>.
  Standard_EXPORT void Init (const Adaptor2d_Curve2d& C);
  
  //! Initializes the resolution function with <C>.
  Standard_EXPORT void Init (const Adaptor3d_Curve& C, const Standard_Real Tol);
  
  //! Initializes the resolution function with <C>.
  Standard_EXPORT void Init (const Adaptor2d_Curve2d& C, const Standard_Real Tol);
  
  //! Initializes the resolution function with <C>
  //! between U1 and U2.
  Standard_EXPORT void Init (const Adaptor3d_Curve& C, const Standard_Real U1, const Standard_Real U2);
  
  //! Initializes the resolution function with <C>
  //! between U1 and U2.
  Standard_EXPORT void Init (const Adaptor2d_Curve2d& C, const Standard_Real U1, const Standard_Real U2);
  
  //! Initializes the resolution function with <C>
  //! between U1 and U2.
  Standard_EXPORT void Init (const Adaptor3d_Curve& C, const Standard_Real U1, const Standard_Real U2, const Standard_Real Tol);
  
  //! Initializes the resolution function with <C>
  //! between U1 and U2.
  Standard_EXPORT void Init (const Adaptor2d_Curve2d& C, const Standard_Real U1, const Standard_Real U2, const Standard_Real Tol);
  
  //! Computes the point at the distance <Abscissa> of
  //! the curve.
  //! U0 is the parameter of the point from which the distance
  //! is measured.
  Standard_EXPORT void Perform (const Standard_Real Abscissa, const Standard_Real U0, const Standard_Real Resolution);
  
  //! Computes the point at the distance <Abscissa> of
  //! the curve.
  //! U0 is the parameter of the point from which the distance
  //! is measured and Ui is the starting value for the iterative
  //! process (should be close to the final solution).
  Standard_EXPORT void Perform (const Standard_Real Abscissa, const Standard_Real U0, const Standard_Real Ui, const Standard_Real Resolution);
  
  //! Computes the point at the distance <Abscissa> of
  //! the curve; performs more appropriate tolerance management;
  //! to use this method in right way it is necessary to call
  //! empty constructor. then call method Init with
  //! Tolerance = Resolution, then call AdvPermorm.
  //! U0 is the parameter of the point from which the distance
  //! is measured and Ui is the starting value for the iterative
  //! process (should be close to the final solution).
  Standard_EXPORT void AdvPerform (const Standard_Real Abscissa, const Standard_Real U0, const Standard_Real Ui, const Standard_Real Resolution);
  
  //! True if the computation was successful, False otherwise.
    Standard_Boolean IsDone() const;
  
  //! Returns the parameter of the solution.
    Standard_Real Parameter() const;
  
  //! Enforce the solution, used by GCPnts.
    void SetParameter (const Standard_Real P);




protected:





private:



  Standard_Boolean myDone;
  Standard_Real myL;
  Standard_Real myParam;
  Standard_Real myUMin;
  Standard_Real myUMax;
  CPnts_MyRootFunction myF;


};


#include <CPnts_AbscissaPoint.lxx>





#endif // _CPnts_AbscissaPoint_HeaderFile