// Created on: 1992-04-03
// 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 _IntRes2d_IntersectionSegment_HeaderFile
#define _IntRes2d_IntersectionSegment_HeaderFile

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

#include <Standard_Boolean.hxx>
#include <IntRes2d_IntersectionPoint.hxx>
class Standard_DomainError;
class IntRes2d_IntersectionPoint;


//! Definition of an intersection curve between
//! two 2D curves.
class IntRes2d_IntersectionSegment 
{
public:

  DEFINE_STANDARD_ALLOC

  
  //! Empty constructor.
  Standard_EXPORT IntRes2d_IntersectionSegment();
  
    IntRes2d_IntersectionSegment(const IntRes2d_IntersectionPoint& P1, const IntRes2d_IntersectionPoint& P2, const Standard_Boolean Oppos, const Standard_Boolean ReverseFlag);
  
    IntRes2d_IntersectionSegment(const IntRes2d_IntersectionPoint& P, const Standard_Boolean First, const Standard_Boolean Oppos, const Standard_Boolean ReverseFlag);
  
  //! Creates an infinite segment of intersection.
    IntRes2d_IntersectionSegment(const Standard_Boolean Oppos);
  
  //! Returns FALSE if the intersection segment has got
  //! the same orientation on both curves.
    Standard_Boolean IsOpposite() const;
  
  //! Returns True if the segment is  limited by a first
  //! point.   This  point defines  the lowest parameter
  //! admitted on the first  curve for the  segment.  If
  //! IsOpposite  returns  False, it  defines the lowest
  //! parameter on the  second curve, otherwise,  it  is
  //! the highest parameter on the second curve.
    Standard_Boolean HasFirstPoint() const;
  
  //! Returns the  first point   of the segment    as an
  //! IntersectionPoint (with    a    transition).   The
  //! exception  DomainError  is raised if HasFirstPoint
  //! returns False.
    const IntRes2d_IntersectionPoint& FirstPoint() const;
  
  //! Returns True if the segment  is  limited by a last
  //! point.  This point  defines  the highest parameter
  //! admitted on the  first curve for  the segment.  If
  //! IsOpposite returns  False, it  defines the highest
  //! parameter on  the  second curve, otherwise, it  is
  //! the lowest parameter on the second curve.
    Standard_Boolean HasLastPoint() const;
  
  //! Returns   the  last point  of the    segment as an
  //! IntersectionPoint   (with  a    transition).   The
  //! exception        DomainError     is   raised    if
  //! HasLastExtremity returns False.
    const IntRes2d_IntersectionPoint& LastPoint() const;




protected:





private:



  Standard_Boolean oppos;
  Standard_Boolean first;
  Standard_Boolean last;
  IntRes2d_IntersectionPoint ptfirst;
  IntRes2d_IntersectionPoint ptlast;


};


#include <IntRes2d_IntersectionSegment.lxx>





#endif // _IntRes2d_IntersectionSegment_HeaderFile
