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// Copyright (c) 2000
// Utrecht University (The Netherlands),
// ETH Zurich (Switzerland),
// INRIA Sophia-Antipolis (France),
// Max-Planck-Institute Saarbruecken (Germany),
// and Tel-Aviv University (Israel). All rights reserved.
//
// This file is part of CGAL (www.cgal.org)
//
// $URL: https://github.com/CGAL/cgal/blob/v6.1/Cartesian_kernel/include/CGAL/Cartesian/Direction_2.h $
// $Id: include/CGAL/Cartesian/Direction_2.h b26b07a1242 $
// SPDX-License-Identifier: LGPL-3.0-or-later OR LicenseRef-Commercial
//
//
// 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>
namespace CGAL {
template < class R_ >
class DirectionC2
{
typedef DirectionC2<R_> Self;
typedef typename R_::Boolean Boolean;
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 std::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{x, y} {}
Boolean operator==(const DirectionC2 &d) const;
Boolean operator!=(const DirectionC2 &d) const;
Vector_2 to_vector() const;
const RT & dx() const
{
return get_pointee_or_identity(base)[0];
}
const RT & dy() const
{
return get_pointee_or_identity(base)[1];
}
};
template < class R >
inline
typename R::Boolean
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
typename R::Boolean
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());
}
} //namespace CGAL
#endif // CGAL_CARTESIAN_DIRECTION_2_H
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