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// Copyright (c) 2000 Utrecht University (The Netherlands),
// ETH Zurich (Switzerland), Freie Universitaet Berlin (Germany),
// INRIA Sophia-Antipolis (France), Martin-Luther-University Halle-Wittenberg
// (Germany), Max-Planck-Institute Saarbruecken (Germany), RISC Linz (Austria),
// and Tel-Aviv University (Israel). All rights reserved.
//
// This file is part of CGAL (www.cgal.org); you can redistribute it and/or
// modify it under the terms of the GNU Lesser General Public License as
// published by the Free Software Foundation; version 2.1 of the License.
// See the file LICENSE.LGPL distributed with CGAL.
//
// Licensees holding a valid commercial license may use this file in
// accordance with the commercial license agreement provided with the software.
//
// This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE
// WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
//
// $URL: svn+ssh://scm.gforge.inria.fr/svn/cgal/branches/CGAL-3.5-branch/Cartesian_kernel/include/CGAL/Cartesian/Direction_2.h $
// $Id: Direction_2.h 49057 2009-04-30 14:03:52Z spion $
//
//
// Author(s) : Andreas Fabri, Herve Bronnimann
#ifndef CGAL_CARTESIAN_DIRECTION_2_H
#define CGAL_CARTESIAN_DIRECTION_2_H
#include <CGAL/array.h>
#include <CGAL/Handle_for.h>
CGAL_BEGIN_NAMESPACE
template < class R_ >
class DirectionC2
{
typedef DirectionC2<R_> Self;
typedef typename R_::FT FT;
typedef FT RT;
typedef typename R_::Point_2 Point_2;
typedef typename R_::Vector_2 Vector_2;
typedef typename R_::Line_2 Line_2;
typedef typename R_::Ray_2 Ray_2;
typedef typename R_::Segment_2 Segment_2;
typedef typename R_::Direction_2 Direction_2;
typedef cpp0x::array<FT, 2> Rep;
typedef typename R_::template Handle<Rep>::type Base;
Base base;
public:
typedef R_ R;
DirectionC2() {}
DirectionC2(const FT &x, const FT &y)
: base(CGAL::make_array(x, y)) {}
bool operator==(const DirectionC2 &d) const;
bool operator!=(const DirectionC2 &d) const;
Vector_2 to_vector() const;
const RT & dx() const
{
return get(base)[0];
}
const RT & dy() const
{
return get(base)[1];
}
};
template < class R >
inline
bool
DirectionC2<R>::operator==(const DirectionC2<R> &d) const
{
if (CGAL::identical(base, d.base))
return true;
return equal_direction(*this, d);
}
template < class R >
inline
bool
DirectionC2<R>::operator!=(const DirectionC2<R> &d) const
{
return !( *this == d );
}
template < class R >
inline
typename DirectionC2<R>::Vector_2
DirectionC2<R>::to_vector() const
{
return Vector_2(dx(), dy());
}
CGAL_END_NAMESPACE
#endif // CGAL_CARTESIAN_DIRECTION_2_H
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