179 lines
4.4 KiB
C
179 lines
4.4 KiB
C
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// Copyright (c) 1999
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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) : Stefan Schirra
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#ifndef CGAL_RAYH3_H
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#define CGAL_RAYH3_H
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#include <utility>
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#include <CGAL/kernel_config.h>
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#include <CGAL/assertions.h>
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#include <CGAL/Origin.h>
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namespace CGAL {
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template < class R_ >
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class RayH3
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{
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typedef typename R_::RT RT;
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typedef typename R_::FT FT;
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typedef typename R_::Point_3 Point_3;
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typedef typename R_::Line_3 Line_3;
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typedef typename R_::Direction_3 Direction_3;
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typedef typename R_::Vector_3 Vector_3;
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typedef std::pair<Point_3, Vector_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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RayH3() {}
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RayH3( const Point_3& sp, const Point_3& secondp)
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: base(sp, secondp-sp) {}
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RayH3( const Point_3& sp, const Vector_3& v)
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: base(sp, v) {}
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RayH3( const Point_3& sp, const Direction_3& d)
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: base(sp, d.to_vector()) {}
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RayH3( const Point_3& sp, const Line_3& l)
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: base(sp, l.to_vector()) {}
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const Point_3 & start() const;
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const Point_3 & source() const;
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Point_3 second_point() const;
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Point_3 point(int i) const;
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Direction_3 direction() const;
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const Vector_3 & to_vector() const;
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Line_3 supporting_line() const;
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RayH3<R> opposite() const;
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bool has_on(const Point_3& p) const;
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bool collinear_has_on(const Point_3 &p) const;
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bool is_degenerate() const;
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bool operator==(const RayH3<R>& r) const;
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bool operator!=(const RayH3<R>& r) const;
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};
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template < class R >
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inline
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const typename RayH3<R>::Point_3 &
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RayH3<R>::source() const
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{ return get_pointee_or_identity(base).first; }
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template < class R >
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inline
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const typename RayH3<R>::Point_3 &
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RayH3<R>::start() const
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{ return get_pointee_or_identity(base).first; }
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template < class R >
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inline
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const typename RayH3<R>::Vector_3 &
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RayH3<R>::to_vector() const
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{
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return get_pointee_or_identity(base).second;
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}
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template < class R >
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inline
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typename RayH3<R>::Direction_3
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RayH3<R>::direction() const
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{
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return to_vector().direction();
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}
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template < class R >
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CGAL_KERNEL_INLINE
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typename RayH3<R>::Point_3
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RayH3<R>::second_point() const
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{ return start() + to_vector(); }
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template < class R >
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CGAL_KERNEL_INLINE
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typename RayH3<R>::Point_3
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RayH3<R>::point(int i) const
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{
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CGAL_kernel_precondition( i >= 0 );
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return start() + RT(i)*to_vector();
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}
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template < class R >
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CGAL_KERNEL_INLINE
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typename RayH3<R>::Line_3
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RayH3<R>::supporting_line() const
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{
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CGAL_kernel_precondition( !is_degenerate() );
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return Line_3(start(), second_point() );
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}
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template < class R >
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CGAL_KERNEL_INLINE
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RayH3<R>
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RayH3<R>::opposite() const
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{ return RayH3<R>( start(), - direction() ); }
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template < class R >
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CGAL_KERNEL_INLINE
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bool
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RayH3<R>::has_on(const typename RayH3<R>::Point_3 &p) const
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{
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return ( ( p == start() )
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||( Direction_3(p - start()) == direction() ) );
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}
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template < class R >
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inline /* XXX */
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bool
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RayH3<R>::collinear_has_on(const typename RayH3<R>::Point_3 &p) const
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{ return has_on(p); }
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template < class R >
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inline
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bool
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RayH3<R>::is_degenerate() const
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{ return to_vector() == NULL_VECTOR; }
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template < class R >
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CGAL_KERNEL_INLINE
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bool
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RayH3<R>::operator==(const RayH3<R>& r) const
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{ return ( (start() == r.start() )&&( direction() == r.direction() ) ); }
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template < class R >
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CGAL_KERNEL_INLINE
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bool
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RayH3<R>::operator!=( const RayH3<R>& r) const
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{ return !operator==(r); }
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} //namespace CGAL
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#endif // CGAL_RAYH3_H
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