93 lines
2.5 KiB
C++
93 lines
2.5 KiB
C++
// Copyright (c) 1999
|
|
// 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/v5.1/Homogeneous_kernel/include/CGAL/Homogeneous/LineH2.h $
|
|
// $Id: LineH2.h 0779373 2020-03-26T13:31:46+01:00 Sébastien Loriot
|
|
// SPDX-License-Identifier: LGPL-3.0-or-later OR LicenseRef-Commercial
|
|
//
|
|
//
|
|
// Author(s) : Stefan Schirra
|
|
|
|
#ifndef CGAL_LINEH2_H
|
|
#define CGAL_LINEH2_H
|
|
|
|
#include <CGAL/kernel_config.h>
|
|
#include <CGAL/array.h>
|
|
|
|
namespace CGAL {
|
|
|
|
template < class R_ >
|
|
class LineH2
|
|
{
|
|
typedef typename R_::FT FT;
|
|
typedef typename R_::RT RT;
|
|
typedef typename R_::Point_2 Point_2;
|
|
typedef typename R_::Vector_2 Vector_2;
|
|
typedef typename R_::Direction_2 Direction_2;
|
|
typedef typename R_::Segment_2 Segment_2;
|
|
typedef typename R_::Ray_2 Ray_2;
|
|
typedef typename R_::Line_2 Line_2;
|
|
|
|
typedef std::array<RT, 3> Rep;
|
|
typedef typename R_::template Handle<Rep>::type Base;
|
|
|
|
Base base;
|
|
|
|
public:
|
|
|
|
typedef R_ R;
|
|
|
|
LineH2() {}
|
|
LineH2(const RT& a, const RT& b, const RT& c)
|
|
: base(CGAL::make_array(a, b, c)) {}
|
|
|
|
bool operator==(const LineH2<R>& l) const;
|
|
bool operator!=(const LineH2<R>& l) const;
|
|
|
|
const RT & a() const { return get_pointee_or_identity(base)[0]; }
|
|
const RT & b() const { return get_pointee_or_identity(base)[1]; }
|
|
const RT & c() const { return get_pointee_or_identity(base)[2]; }
|
|
|
|
};
|
|
|
|
template < class R >
|
|
CGAL_KERNEL_MEDIUM_INLINE
|
|
bool
|
|
LineH2<R>::operator==(const LineH2<R>& l) const
|
|
{
|
|
if ( (a() * l.c() != l.a() * c() )
|
|
||(b() * l.c() != l.b() * c() ) )
|
|
{
|
|
return false;
|
|
}
|
|
int sc = static_cast<int>(CGAL_NTS sign(c()));
|
|
int slc = static_cast<int>(CGAL_NTS sign(l.c()));
|
|
if ( sc == slc )
|
|
{
|
|
if (sc == 0)
|
|
return ( (a()*l.b() == b()*l.a() )
|
|
&&(CGAL_NTS sign(a() )== CGAL_NTS sign( l.a() ))
|
|
&&(CGAL_NTS sign(b() )== CGAL_NTS sign( l.b() )) );
|
|
else
|
|
return true;
|
|
}
|
|
else
|
|
return false;
|
|
}
|
|
|
|
template < class R >
|
|
inline
|
|
bool
|
|
LineH2<R>::operator!=(const LineH2<R>& l) const
|
|
{ return !(*this == l); }
|
|
|
|
} //namespace CGAL
|
|
|
|
#endif // CGAL_LINEH2_H
|