// Created on: 1991-04-24
// Created by: Remi GILET
// 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 _Geom2dGcc_Lin2dTanOblIter_HeaderFile
#define _Geom2dGcc_Lin2dTanOblIter_HeaderFile

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

#include <Standard_Boolean.hxx>
#include <gp_Lin2d.hxx>
#include <GccEnt_Position.hxx>
#include <gp_Pnt2d.hxx>
#include <Standard_Real.hxx>
class GccEnt_BadQualifier;
class StdFail_NotDone;
class Geom2dGcc_IsParallel;
class Geom2dGcc_QCurve;
class gp_Lin2d;
class gp_Pnt2d;


//! This class implements the algorithms used to
//! create 2d line tangent to a curve QualifiedCurv and
//! doing an angle Angle with a line TheLin.
//! The angle must be in Radian.
class Geom2dGcc_Lin2dTanOblIter 
{
public:

  DEFINE_STANDARD_ALLOC

  
  //! This class implements the algorithm used to
  //! create 2d line tangent to a curve and doing an
  //! angle Angle with the line TheLin.
  //! Angle must be in Radian.
  //! Param2 is the initial guess on the curve QualifiedCurv.
  //! Tolang is the angular tolerance.
  Standard_EXPORT Geom2dGcc_Lin2dTanOblIter(const Geom2dGcc_QCurve& Qualified1, const gp_Lin2d& TheLin, const Standard_Real Param1, const Standard_Real TolAng, const Standard_Real Angle = 0);
  
  //! This method returns true when there is a solution
  //! and false in the other cases.
  Standard_EXPORT Standard_Boolean IsDone() const;
  
  Standard_EXPORT gp_Lin2d ThisSolution() const;
  
  Standard_EXPORT void WhichQualifier (GccEnt_Position& Qualif1) const;
  
  Standard_EXPORT void Tangency1 (Standard_Real& ParSol, Standard_Real& ParArg, gp_Pnt2d& PntSol) const;
  
  Standard_EXPORT void Intersection2 (Standard_Real& ParSol, Standard_Real& ParArg, gp_Pnt2d& PntSol) const;
  
  Standard_EXPORT Standard_Boolean IsParallel2() const;




protected:





private:



  Standard_Boolean WellDone;
  Standard_Boolean Paral2;
  gp_Lin2d linsol;
  GccEnt_Position qualifier1;
  gp_Pnt2d pnttg1sol;
  gp_Pnt2d pntint2sol;
  Standard_Real par1sol;
  Standard_Real par2sol;
  Standard_Real pararg1;
  Standard_Real pararg2;


};







#endif // _Geom2dGcc_Lin2dTanOblIter_HeaderFile