// Created on: 1992-09-28
// Created by: Didier PIFFAULT
// 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 _Intf_InterferencePolygon2d_HeaderFile
#define _Intf_InterferencePolygon2d_HeaderFile

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

#include <Standard_Boolean.hxx>
#include <Intf_Interference.hxx>
class Intf_Polygon2d;
class gp_Pnt2d;

//! Computes the  interference between two  polygons or
//! the    self intersection of    a  polygon  in  two
//! dimensions.
class Intf_InterferencePolygon2d : public Intf_Interference
{
public:
  DEFINE_STANDARD_ALLOC

  //! Constructs an empty interference of Polygon.
  Standard_EXPORT Intf_InterferencePolygon2d();

  //! Constructs and computes an interference between two Polygons.
  Standard_EXPORT Intf_InterferencePolygon2d(const Intf_Polygon2d& Obje1,
                                             const Intf_Polygon2d& Obje2);

  //! Constructs and computes the auto interference of a Polygon.
  Standard_EXPORT Intf_InterferencePolygon2d(const Intf_Polygon2d& Obje);

  //! Computes an interference between two Polygons.
  Standard_EXPORT void Perform(const Intf_Polygon2d& Obje1, const Intf_Polygon2d& Obje2);

  //! Computes the self interference of a Polygon.
  Standard_EXPORT void Perform(const Intf_Polygon2d& Obje);

  //! Gives the  geometrical 2d point   of the  intersection
  //! point at address <Index> in the interference.
  Standard_EXPORT gp_Pnt2d Pnt2dValue(const Standard_Integer Index) const;

protected:
private:
  Standard_EXPORT void Interference(const Intf_Polygon2d& Obje1, const Intf_Polygon2d& Obje2);

  Standard_EXPORT void Interference(const Intf_Polygon2d& Obje);

  Standard_EXPORT void Clean();

  //! Computes the intersection between two segments
  //! <BegO><EndO> et <BegT><EndT>.
  Standard_EXPORT void Intersect(const Standard_Integer iO,
                                 const Standard_Integer iT,
                                 const gp_Pnt2d&        BegO,
                                 const gp_Pnt2d&        EndO,
                                 const gp_Pnt2d&        BegT,
                                 const gp_Pnt2d&        EndT);

  Standard_Boolean oClos;
  Standard_Boolean tClos;
  Standard_Integer nbso;
};

#endif // _Intf_InterferencePolygon2d_HeaderFile
