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// Copyright (c) 2000
// Utrecht University (The Netherlands),
// ETH Zurich (Switzerland),
// INRIA Sophia-Antipolis (France),
// Max-Planck-Institute Saarbruecken (Germany),
// and Tel-Aviv University (Israel). All rights reserved.
//
// This file is part of CGAL (www.cgal.org)
//
// $URL: https://github.com/CGAL/cgal/blob/v6.1/Cartesian_kernel/include/CGAL/Cartesian/Line_3.h $
// $Id: include/CGAL/Cartesian/Line_3.h b26b07a1242 $
// SPDX-License-Identifier: LGPL-3.0-or-later OR LicenseRef-Commercial
//
//
// Author(s) : Andreas Fabri
#ifndef CGAL_CARTESIAN_LINE_3_H
#define CGAL_CARTESIAN_LINE_3_H
#include <CGAL/Handle_for.h>
namespace CGAL {
template < class R_ >
class LineC3
{
typedef typename R_::Boolean Boolean;
typedef typename R_::FT FT;
typedef typename R_::Point_3 Point_3;
typedef typename R_::Vector_3 Vector_3;
typedef typename R_::Direction_3 Direction_3;
typedef typename R_::Plane_3 Plane_3;
typedef typename R_::Ray_3 Ray_3;
typedef typename R_::Line_3 Line_3;
typedef typename R_::Segment_3 Segment_3;
struct Rep
{
Point_3 first;
Vector_3 second;
Rep () : first(), second() { }
Rep (const Point_3& p, const Vector_3& v) : first(p), second(v) { }
};
typedef typename R_::template Handle<Rep>::type Base;
Base base;
public:
typedef R_ R;
LineC3() {}
LineC3(const Point_3 &p, const Point_3 &q)
{ *this = R().construct_line_3_object()(p, q); }
explicit LineC3(const Segment_3 &s)
{ *this = R().construct_line_3_object()(s); }
explicit LineC3(const Ray_3 &r)
{ *this = R().construct_line_3_object()(r); }
LineC3(const Point_3 &p, const Vector_3 &v)
: base(p, v) {}
LineC3(const Point_3 &p, const Direction_3 &d)
{ *this = R().construct_line_3_object()(p, d); }
typename R::Boolean operator==(const LineC3 &l) const;
typename R::Boolean operator!=(const LineC3 &l) const;
Plane_3 perpendicular_plane(const Point_3 &p) const;
Line_3 opposite() const;
const Point_3 & point() const
{
return get_pointee_or_identity(base).first;
}
const Vector_3 & to_vector() const
{
return get_pointee_or_identity(base).second;
}
Direction_3 direction() const
{
return Direction_3(to_vector());
}
Point_3 point(const FT i) const;
Boolean has_on(const Point_3 &p) const;
Boolean is_degenerate() const;
};
template < class R >
inline
typename R::Boolean
LineC3<R>::operator==(const LineC3<R> &l) const
{
if (CGAL::identical(base, l.base))
return true;
return has_on(l.point()) && (direction() == l.direction());
}
template < class R >
inline
typename R::Boolean
LineC3<R>::operator!=(const LineC3<R> &l) const
{
return !(*this == l);
}
template < class R >
inline
typename LineC3<R>::Point_3
LineC3<R>::point(const FT i) const
{ return point() + i * to_vector(); }
template < class R >
inline
typename LineC3<R>::Plane_3
LineC3<R>::
perpendicular_plane(const typename LineC3<R>::Point_3 &p) const
{
return Plane_3(p, to_vector());
}
template < class R >
inline
typename LineC3<R>::Line_3
LineC3<R>::opposite() const
{
return Line_3(point(), -to_vector());
}
template < class R >
inline
typename R::Boolean
LineC3<R>::
has_on(const typename LineC3<R>::Point_3 &p) const
{
return collinear(point(), point()+to_vector(), p);
}
template < class R >
inline
typename R::Boolean
LineC3<R>::is_degenerate() const
{
return to_vector() == NULL_VECTOR;
}
} //namespace CGAL
#endif // CGAL_CARTESIAN_LINE_3_H
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