mirror of https://github.com/CGAL/cgal
142 lines
3.8 KiB
C++
142 lines
3.8 KiB
C++
// Copyright (c) 1999 Utrecht University (The Netherlands),
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// ETH Zurich (Switzerland), Freie Universitaet Berlin (Germany),
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// INRIA Sophia-Antipolis (France), Martin-Luther-University Halle-Wittenberg
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// (Germany), Max-Planck-Institute Saarbruecken (Germany), RISC Linz (Austria),
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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; version 2.1 of the License.
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// See the file LICENSE.LGPL distributed with CGAL.
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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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//
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//
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// Author(s) : Andreas Fabri, Stefan Schirra
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#ifndef CGAL_DIRECTION_3_H
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#define CGAL_DIRECTION_3_H
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CGAL_BEGIN_NAMESPACE
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template <class R_>
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class Direction_3 : public R_::Kernel_base::Direction_3
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{
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typedef typename R_::RT RT;
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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_::Aff_transformation_3 Aff_transformation_3;
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public:
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typedef typename R_::Kernel_base::Direction_3 Rep;
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const Rep& rep() const
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{
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return *this;
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}
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Rep& rep()
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{
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return *this;
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}
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typedef R_ R;
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Direction_3() {}
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Direction_3(const Rep& d)
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: Rep(d) {}
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Direction_3(const Vector_3& v)
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: Rep(typename R::Construct_direction_3()(v).rep()) {}
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Direction_3(const Line_3& l)
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: Rep(typename R::Construct_direction_3()(l).rep()) {}
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Direction_3(const Ray_3& r)
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: Rep(typename R::Construct_direction_3()(r).rep()) {}
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Direction_3(const Segment_3& s)
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: Rep(typename R::Construct_direction_3()(s).rep()) {}
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Direction_3(const RT& hx, const RT& hy, const RT& hz)
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: Rep(typename R::Construct_direction_3()(hx, hy, hz).rep()) {}
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Direction_3 transform(const Aff_transformation_3 &t) const
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{
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return t.transform(*this);
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}
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Direction_3
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operator-() const
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{
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return R().construct_opposite_direction_3_object()(*this);
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}
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Vector_3 to_vector() const
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{
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return R().construct_vector_3_object()(*this);
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}
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Vector_3 vector() const { return to_vector(); }
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typename Qualified_result_of<typename R::Compute_dx_3, Direction_3>::type
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dx() const
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{
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return R().compute_dx_3_object()(*this);
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}
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typename Qualified_result_of<typename R::Compute_dy_3, Direction_3>::type
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dy() const
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{
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return R().compute_dy_3_object()(*this);
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}
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typename Qualified_result_of<typename R::Compute_dz_3, Direction_3>::type
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dz() const
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{
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return R().compute_dz_3_object()(*this);
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}
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typename Qualified_result_of<typename R::Compute_dx_3, Direction_3>::type
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delta(int i) const
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{
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CGAL_kernel_precondition( i >= 0 && i <= 2 );
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if (i==0) return dx();
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if (i==1) return dy();
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return dz();
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}
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};
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#ifndef CGAL_NO_OSTREAM_INSERT_DIRECTION_3
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template < class R >
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std::ostream& operator<<(std::ostream& os, const Direction_3<R>& d)
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{
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typedef typename R::Kernel_base::Direction_3 Rep;
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return os << static_cast<const Rep&>(d); }
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#endif // CGAL_NO_OSTREAM_INSERT_DIRECTION_3
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#ifndef CGAL_NO_ISTREAM_EXTRACT_DIRECTION_3
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template < class R >
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std::istream& operator>>(std::istream& is, Direction_3<R>& p)
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{
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typedef typename R::Kernel_base::Direction_3 Rep;
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return is >> static_cast<Rep&>(p); }
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#endif // CGAL_NO_ISTREAM_EXTRACT_DIRECTION_3
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CGAL_END_NAMESPACE
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#endif // CGAL_DIRECTION_3_H
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