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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_3.h $
// $Id: Direction_3.h 49589 2009-05-26 07:54:52Z spion $
//
//
// Author(s) : Andreas Fabri
#ifndef CGAL_CARTESIAN_DIRECTION_3_H
#define CGAL_CARTESIAN_DIRECTION_3_H
#include <CGAL/array.h>
#include <CGAL/Handle_for.h>
CGAL_BEGIN_NAMESPACE
template < class R_ >
class DirectionC3
{
typedef typename R_::FT FT;
typedef typename R_::Vector_3 Vector_3;
typedef typename R_::Line_3 Line_3;
typedef typename R_::Ray_3 Ray_3;
typedef typename R_::Segment_3 Segment_3;
typedef typename R_::Direction_3 Direction_3;
typedef cpp0x::array<FT, 3> Rep;
typedef typename R_::template Handle<Rep>::type Base;
Base base;
public:
typedef R_ R;
DirectionC3() {}
explicit DirectionC3(const Vector_3 &v)
: base(CGAL::make_array(v.x(), v.y(), v.z())) {}
// { *this = v.direction(); }
explicit DirectionC3(const Line_3 &l)
{ *this = l.rep().direction(); }
explicit DirectionC3(const Ray_3 &r)
{ *this = r.direction(); }
explicit DirectionC3(const Segment_3 &s)
{ *this = s.direction(); }
DirectionC3(const FT &x, const FT &y, const FT &z)
: base(CGAL::make_array(x, y, z)) {}
typename R::Boolean operator==(const DirectionC3 &d) const;
typename R::Boolean operator!=(const DirectionC3 &d) const;
Vector_3 to_vector() const;
Vector_3 vector() const { return to_vector(); }
const FT & dx() const
{
return get(base)[0];
}
const FT & dy() const
{
return get(base)[1];
}
const FT & dz() const
{
return get(base)[2];
}
const FT & hdx() const
{
return dx();
}
const FT & hdy() const
{
return dy();
}
const FT & hdz() const
{
return dz();
}
FT hw() const
{
return FT(1);
}
};
template < class R >
inline
typename R::Boolean
DirectionC3<R>::operator==(const DirectionC3<R> &d) const
{
if (CGAL::identical(base, d.base))
return true;
return equal_directionC3(dx(), dy(), dz(), d.dx(), d.dy(), d.dz());
}
template < class R >
inline
typename R::Boolean
DirectionC3<R>::operator!=(const DirectionC3<R> &d) const
{
return !(*this == d);
}
template < class R >
inline
typename DirectionC3<R>::Vector_3
DirectionC3<R>::to_vector() const
{
return Vector_3(dx(), dy(), dz());
}
CGAL_END_NAMESPACE
#endif // CGAL_CARTESIAN_DIRECTION_3_H
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