// Created on: 1992-03-26
// Created by: Laurent BUCHARD
// 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 _IntCurve_IConicTool_HeaderFile
#define _IntCurve_IConicTool_HeaderFile

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

#include <Standard_Real.hxx>
#include <gp_Ax22d.hxx>
#include <GeomAbs_CurveType.hxx>
#include <gp_Trsf2d.hxx>
class gp_Elips2d;
class gp_Lin2d;
class gp_Circ2d;
class gp_Parab2d;
class gp_Hypr2d;
class gp_Pnt2d;
class gp_Vec2d;


//! Implementation of the ImpTool from IntImpParGen
//! for conics of gp.
class IntCurve_IConicTool 
{
public:

  DEFINE_STANDARD_ALLOC

  
  Standard_EXPORT IntCurve_IConicTool();
  
  Standard_EXPORT IntCurve_IConicTool(const IntCurve_IConicTool& IT);
  
  Standard_EXPORT IntCurve_IConicTool(const gp_Elips2d& E);
  
  Standard_EXPORT IntCurve_IConicTool(const gp_Lin2d& L);
  
  Standard_EXPORT IntCurve_IConicTool(const gp_Circ2d& C);
  
  Standard_EXPORT IntCurve_IConicTool(const gp_Parab2d& P);
  
  Standard_EXPORT IntCurve_IConicTool(const gp_Hypr2d& H);
  
  Standard_EXPORT gp_Pnt2d Value (const Standard_Real X) const;
  
  Standard_EXPORT void D1 (const Standard_Real U, gp_Pnt2d& P, gp_Vec2d& T) const;
  
  Standard_EXPORT void D2 (const Standard_Real U, gp_Pnt2d& P, gp_Vec2d& T, gp_Vec2d& N) const;
  
  //! Computes the value of the signed  distance between
  //! the point P and the implicit curve.
  Standard_EXPORT Standard_Real Distance (const gp_Pnt2d& P) const;
  
  //! Computes  the   Gradient  of  the  Signed Distance
  //! between  a  point and  the  implicit curve, at the
  //! point P.
  Standard_EXPORT gp_Vec2d GradDistance (const gp_Pnt2d& P) const;
  
  //! Returns the parameter U of the point on the implicit curve corresponding to the point P.
  //! The correspondence between P and the point P(U) on the
  //! implicit curve must be coherent with the way of determination of the signed distance.
  Standard_EXPORT Standard_Real FindParameter (const gp_Pnt2d& P) const;

private:

  Standard_Real prm1;
  Standard_Real prm2;
  Standard_Real prm3;
  gp_Ax22d Axis;
  GeomAbs_CurveType type;
  gp_Trsf2d Abs_To_Object;

};

#endif // _IntCurve_IConicTool_HeaderFile