97 lines
2.3 KiB
C
97 lines
2.3 KiB
C
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// Copyright (c) 2000
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// Utrecht University (The Netherlands),
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// ETH Zurich (Switzerland),
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// INRIA Sophia-Antipolis (France),
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// Max-Planck-Institute Saarbruecken (Germany),
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// and Tel-Aviv University (Israel). All rights reserved.
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//
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// This file is part of CGAL (www.cgal.org)
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//
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// $URL: https://github.com/CGAL/cgal/blob/v5.1/Cartesian_kernel/include/CGAL/Cartesian/Direction_2.h $
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// $Id: Direction_2.h 0779373 2020-03-26T13:31:46+01:00 Sébastien Loriot
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// SPDX-License-Identifier: LGPL-3.0-or-later OR LicenseRef-Commercial
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//
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//
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// Author(s) : Andreas Fabri, Herve Bronnimann
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#ifndef CGAL_CARTESIAN_DIRECTION_2_H
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#define CGAL_CARTESIAN_DIRECTION_2_H
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#include <CGAL/array.h>
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#include <CGAL/Handle_for.h>
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namespace CGAL {
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template < class R_ >
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class DirectionC2
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{
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typedef DirectionC2<R_> Self;
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typedef typename R_::FT FT;
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typedef FT RT;
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typedef typename R_::Point_2 Point_2;
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typedef typename R_::Vector_2 Vector_2;
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typedef typename R_::Line_2 Line_2;
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typedef typename R_::Ray_2 Ray_2;
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typedef typename R_::Segment_2 Segment_2;
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typedef typename R_::Direction_2 Direction_2;
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typedef std::array<FT, 2> Rep;
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typedef typename R_::template Handle<Rep>::type Base;
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Base base;
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public:
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typedef R_ R;
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DirectionC2() {}
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DirectionC2(const FT &x, const FT &y)
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: base(CGAL::make_array(x, y)) {}
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bool operator==(const DirectionC2 &d) const;
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bool operator!=(const DirectionC2 &d) const;
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Vector_2 to_vector() const;
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const RT & dx() const
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{
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return get_pointee_or_identity(base)[0];
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}
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const RT & dy() const
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{
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return get_pointee_or_identity(base)[1];
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}
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};
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template < class R >
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inline
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bool
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DirectionC2<R>::operator==(const DirectionC2<R> &d) const
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{
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if (CGAL::identical(base, d.base))
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return true;
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return equal_direction(*this, d);
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}
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template < class R >
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inline
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bool
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DirectionC2<R>::operator!=(const DirectionC2<R> &d) const
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{
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return !( *this == d );
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}
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template < class R >
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inline
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typename DirectionC2<R>::Vector_2
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DirectionC2<R>::to_vector() const
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{
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return Vector_2(dx(), dy());
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}
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} //namespace CGAL
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#endif // CGAL_CARTESIAN_DIRECTION_2_H
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