138 lines
3.3 KiB
C
138 lines
3.3 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); you can redistribute it and/or
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// modify it under the terms of the GNU Lesser General Public License as
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// published by the Free Software Foundation; either version 3 of the License,
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// or (at your option) any later version.
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//
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// Licensees holding a valid commercial license may use this file in
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// accordance with the commercial license agreement provided with the software.
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//
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// This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE
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// WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
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//
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// $URL$
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// $Id$
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// SPDX-License-Identifier: LGPL-3.0+
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//
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//
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// Author(s) : Andreas Fabri
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#ifndef CGAL_CARTESIAN_DIRECTION_3_H
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#define CGAL_CARTESIAN_DIRECTION_3_H
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#include <CGAL/array.h>
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#include <CGAL/Handle_for.h>
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#include <CGAL/predicates/kernel_ftC3.h>
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namespace CGAL {
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template < class R_ >
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class DirectionC3
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{
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typedef typename R_::FT FT;
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typedef typename R_::Vector_3 Vector_3;
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typedef typename R_::Line_3 Line_3;
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typedef typename R_::Ray_3 Ray_3;
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typedef typename R_::Segment_3 Segment_3;
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typedef typename R_::Direction_3 Direction_3;
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typedef cpp11::array<FT, 3> 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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DirectionC3() {}
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explicit DirectionC3(const Vector_3 &v)
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: base(CGAL::make_array(v.x(), v.y(), v.z())) {}
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// { *this = v.direction(); }
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explicit DirectionC3(const Line_3 &l)
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{ *this = l.rep().direction(); }
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explicit DirectionC3(const Ray_3 &r)
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{ *this = r.direction(); }
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explicit DirectionC3(const Segment_3 &s)
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{ *this = s.direction(); }
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DirectionC3(const FT &x, const FT &y, const FT &z)
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: base(CGAL::make_array(x, y, z)) {}
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typename R::Boolean operator==(const DirectionC3 &d) const;
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typename R::Boolean operator!=(const DirectionC3 &d) const;
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Vector_3 to_vector() const;
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Vector_3 vector() const { return to_vector(); }
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const FT & 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 FT & 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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const FT & dz() const
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{
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return get_pointee_or_identity(base)[2];
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}
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const FT & hdx() const
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{
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return dx();
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}
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const FT & hdy() const
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{
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return dy();
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}
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const FT & hdz() const
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{
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return dz();
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}
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FT hw() const
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{
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return FT(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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typename R::Boolean
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DirectionC3<R>::operator==(const DirectionC3<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_directionC3(dx(), dy(), dz(), d.dx(), d.dy(), d.dz());
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}
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template < class R >
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inline
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typename R::Boolean
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DirectionC3<R>::operator!=(const DirectionC3<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 DirectionC3<R>::Vector_3
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DirectionC3<R>::to_vector() const
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{
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return Vector_3(dx(), dy(), dz());
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}
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} //namespace CGAL
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#endif // CGAL_CARTESIAN_DIRECTION_3_H
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