// Created on: 1992-09-28
// Created by: Remi GILET
// 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 _GC_MakeArcOfParabola_HeaderFile
#define _GC_MakeArcOfParabola_HeaderFile

#include "Standard.hxx"
#include "Standard_DefineAlloc.hxx"
#include "Standard_Handle.hxx"

#include "GC_Root.hxx"
#include "Geom_TrimmedCurve.hxx"

class gp_Parab;
class gp_Pnt;

//! Implements construction algorithms for parabola arcs in 3D space.
//! The result is a `Geom_TrimmedCurve`.
//! A MakeArcOfParabola object provides a framework for:
//! -   defining the construction of the arc of parabola,
//! -   implementing the construction algorithm, and
//! -   consulting the results. In particular, the
//! Value function returns the constructed arc of parabola.
class GC_MakeArcOfParabola : public GC_Root
{
public:
  DEFINE_STANDARD_ALLOC

  //! Constructs an arc from angular bounds on a parabola.
  //! @param[in] theParab source parabola
  //! @param[in] theAlpha1 first angle (radians)
  //! @param[in] theAlpha2 second angle (radians)
  //! @param[in] theSense orientation of resulting arc
  Standard_EXPORT GC_MakeArcOfParabola(const gp_Parab& theParab,
                                       const double    theAlpha1,
                                       const double    theAlpha2,
                                       const bool      theSense);

  //! Constructs an arc from a point and angle on a parabola.
  //! @param[in] theParab source parabola
  //! @param[in] theP point on parabola
  //! @param[in] theAlpha target angle (radians)
  //! @param[in] theSense orientation of resulting arc
  Standard_EXPORT GC_MakeArcOfParabola(const gp_Parab& theParab,
                                       const gp_Pnt&   theP,
                                       const double    theAlpha,
                                       const bool      theSense);

  //! Constructs an arc between two points on a parabola.
  //! @param[in] theParab source parabola
  //! @param[in] theP1 first point
  //! @param[in] theP2 second point
  //! @param[in] theSense orientation of resulting arc
  Standard_EXPORT GC_MakeArcOfParabola(const gp_Parab& theParab,
                                       const gp_Pnt&   theP1,
                                       const gp_Pnt&   theP2,
                                       const bool      theSense);

  //! Returns the constructed arc of parabola.
  //! @return resulting arc
  Standard_EXPORT const occ::handle<Geom_TrimmedCurve>& Value() const;

  //! Conversion operator returning the constructed object.
  //! @return resulting object
  operator const occ::handle<Geom_TrimmedCurve>&() const { return Value(); }

private:
  occ::handle<Geom_TrimmedCurve> TheArc;
};

#endif // _GC_MakeArcOfParabola_HeaderFile