/usr/include/CGAL/Cartesian/Circle_2.h is in libcgal-dev 4.2-5ubuntu1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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// 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); you can redistribute it and/or
// modify it under the terms of the GNU Lesser General Public License as
// published by the Free Software Foundation; either version 3 of the License,
// or (at your option) any later version.
//
// Licensees holding a valid commercial license may use this file in
// accordance with the commercial license agreement provided with the software.
//
// This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE
// WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
//
// $URL$
// $Id$
//
//
// Author(s) : Andreas Fabri, Herve Bronnimann
#ifndef CGAL_CARTESIAN_CIRCLE_2_H
#define CGAL_CARTESIAN_CIRCLE_2_H
#include <CGAL/Cartesian/predicates_on_points_2.h>
#include <boost/tuple/tuple.hpp>
namespace CGAL {
template <class R_ >
class CircleC2
{
typedef typename R_::FT FT;
typedef typename R_::RT RT;
typedef typename R_::Circle_2 Circle_2;
typedef typename R_::Point_2 Point_2;
typedef boost::tuple<Point_2, FT, Orientation> Rep;
typedef typename R_::template Handle<Rep>::type Base;
Base base;
public:
typedef R_ R;
CircleC2() {}
explicit CircleC2(const Point_2 ¢er, const FT &squared_radius = FT(0),
const Orientation &orient = COUNTERCLOCKWISE) // Is this new?
{
CGAL_kernel_precondition( ( squared_radius >= FT(0) ) &
( orient != COLLINEAR) );
base = Rep(center, squared_radius, orient);
}
bool operator==(const CircleC2 &s) const;
bool operator!=(const CircleC2 &s) const;
const Point_2 & center() const
{
return get(base).template get<0>();
}
const FT & squared_radius() const
{
return get(base).template get<1>();
}
Orientation orientation() const
{
return get(base).template get<2>();
}
};
} //namespace CGAL
#endif // CGAL_CARTESIAN_CIRCLE_2_H
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