OCCT

// Created on: 1991-10-10
// Created by: Jean Claude VAUTHIER
// 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 _Convert_HyperbolaToBSplineCurve_HeaderFile
#define _Convert_HyperbolaToBSplineCurve_HeaderFile

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

#include <Convert_ConicToBSplineCurve.hxx>
class gp_Hypr2d;

//! This algorithm converts a hyperbola into a rational B-spline curve.
//! The hyperbola is an Hypr2d from package gp with the
//! parametrization :
//! P (U) =
//! Loc + (MajorRadius * std::cosh(U) * Xdir + MinorRadius * std::sinh(U) * Ydir)
//! where Loc is the location point of the hyperbola, Xdir and Ydir are
//! the normalized directions of the local cartesian coordinate system
//! of the hyperbola.
//! KeyWords :
//! Convert, Hyperbola, BSplineCurve, 2D .
class Convert_HyperbolaToBSplineCurve : public Convert_ConicToBSplineCurve
{
public:
  DEFINE_STANDARD_ALLOC

  //! The hyperbola H is limited between the parametric values U1, U2
  //! and the equivalent B-spline curve has the same orientation as the
  //! hyperbola.
  Standard_EXPORT Convert_HyperbolaToBSplineCurve(const gp_Hypr2d& H,
                                                  const double     U1,
                                                  const double     U2);
};

#endif // _Convert_HyperbolaToBSplineCurve_HeaderFile