/usr/include/CGAL/Homogeneous_converter.h is in libcgal-dev 4.5-2.
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) : Sylvain Pion
// Menelaos Karavelas <mkaravel@cse.nd.edu>
#ifndef CGAL_HOMOGENEOUS_CONVERTER_H
#define CGAL_HOMOGENEOUS_CONVERTER_H
// This file contains the definition of a kernel converter, based on
// Homogeneous representation. It should work between *Homogeneous<A,B>
// and *Homogeneous<C,D>, provided you give an RT converter from A to C,
// and an FT converter from B to D.
#include <CGAL/basic.h>
#include <CGAL/NT_converter.h>
#include <CGAL/Enum_converter.h>
#include <CGAL/Bbox_2.h>
#include <CGAL/Bbox_3.h>
namespace CGAL {
template <class K1, class K2,
class RT_Converter = NT_converter<typename K1::RT, typename K2::RT>,
class FT_Converter = NT_converter<typename K1::FT, typename K2::FT> >
class Homogeneous_converter : public Enum_converter
{
private:
typedef Enum_converter Base;
public:
typedef K1 Source_kernel;
typedef K2 Target_kernel;
typedef RT_Converter Ring_number_type_converter;
typedef FT_Converter Field_number_type_converter;
using Base::operator();
Bbox_2
operator()(const Bbox_2& b)
{
return b;
}
Bbox_3
operator()(const Bbox_3& b)
{
return b;
}
typename K2::RT
operator()(const typename K1::RT &a) const
{
return c(a);
}
typename K2::FT
operator()(const typename K1::FT &a) const
{
return c(a);
}
typename K2::Point_2
operator()(const typename K1::Point_2 &a) const
{
return k.construct_point_2_object()(rc(a.hx()), rc(a.hy()),
rc(a.hw()));
}
typename K2::Vector_2
operator()(const typename K1::Vector_2 &a) const
{
return k.construct_vector_2_object()(rc(a.hx()), rc(a.hy()),
rc(a.hw()));
}
typename K2::Direction_2
operator()(const typename K1::Direction_2 &a) const
{
return k.construct_direction_2_object()(rc(a.dx()), rc(a.dy()));
}
typename K2::Segment_2
operator()(const typename K1::Segment_2 &a) const
{
return k.construct_segment_2_object()(operator()(a.source()),
operator()(a.target()));
}
typename K2::Line_2
operator()(const typename K1::Line_2 &a) const
{
return k.construct_line_2_object()(rc(a.a()), rc(a.b()), rc(a.c()));
}
typename K2::Ray_2
operator()(const typename K1::Ray_2 &a) const
{
return k.construct_ray_2_object()(operator()(a.source()),
operator()(a.second_point()));
}
typename K2::Circle_2
operator()(const typename K1::Circle_2 &a) const
{
return k.construct_circle_2_object()(operator()(a.center()),
fc(a.squared_radius()),
a.orientation());
}
typename K2::Triangle_2
operator()(const typename K1::Triangle_2 &a) const
{
return k.construct_triangle_2_object()(operator()(a.vertex(0)),
operator()(a.vertex(1)),
operator()(a.vertex(2)));
}
typename K2::Iso_rectangle_2
operator()(const typename K1::Iso_rectangle_2 &a) const
{
return k.construct_iso_rectangle_2_object()(operator()((a.min)()),
operator()((a.max)()), 0);
}
typename K2::Point_3
operator()(const typename K1::Point_3 &a) const
{
return k.construct_point_3_object()(rc(a.hx()), rc(a.hy()),
rc(a.hz()), rc(a.hw()));
}
typename K2::Vector_3
operator()(const typename K1::Vector_3 &a) const
{
return k.construct_vector_3_object()(rc(a.hx()), rc(a.hy()),
rc(a.hz()), rc(a.hw()));
}
typename K2::Direction_3
operator()(const typename K1::Direction_3 &a) const
{
return k.construct_direction_3_object()(rc(a.dx()), rc(a.dy()),
rc(a.dz()));
}
typename K2::Segment_3
operator()(const typename K1::Segment_3 &a) const
{
return k.construct_segment_3_object()(operator()(a.source()),
operator()(a.target()));
}
typename K2::Line_3
operator()(const typename K1::Line_3 &a) const
{
return k.construct_line_3_object()(operator()(a.point()),
operator()(a.direction()));
}
typename K2::Ray_3
operator()(const typename K1::Ray_3 &a) const
{
return k.construct_ray_3_object()(operator()(a.source()),
operator()(a.second_point()));
}
typename K2::Sphere_3
operator()(const typename K1::Sphere_3 &a) const
{
return k.construct_sphere_3_object()(operator()(a.center()),
fc(a.squared_radius()),
a.orientation());
}
typename K2::Circle_3
operator()(const typename K1::Circle_3 &a) const
{
return k.construct_circle_3_object()(operator()(a.center()),
fc(a.squared_radius()),
operator()(a.supporting_plane()));
}
typename K2::Triangle_3
operator()(const typename K1::Triangle_3 &a) const
{
return k.construct_triangle_3_object()(operator()(a.vertex(0)),
operator()(a.vertex(1)),
operator()(a.vertex(2)));
}
typename K2::Tetrahedron_3
operator()(const typename K1::Tetrahedron_3 &a) const
{
return k.construct_tetrahedron_3_object()(operator()(a.vertex(0)),
operator()(a.vertex(1)),
operator()(a.vertex(2)),
operator()(a.vertex(3)));
}
typename K2::Plane_3
operator()(const typename K1::Plane_3 &a) const
{
return k.construct_plane_3_object()(rc(a.a()), rc(a.b()), rc(a.c()),
rc(a.d()));
}
typename K2::Iso_cuboid_3
operator()(const typename K1::Iso_cuboid_3 &a) const
{
return k.construct_iso_cuboid_3_object()(operator()((a.min)()),
operator()((a.max)()), 0);
}
private:
RT_Converter rc;
FT_Converter fc;
K2 k;
};
// Specialization when converting to the same kernel,
// to avoid making copies.
template < class K, class C1, class C2 >
class Homogeneous_converter <K, K, C1, C2>
{
public:
template < typename T >
const T& operator()(const T&t) const { return t; }
};
} //namespace CGAL
#endif // CGAL_HOMOGENEOUS_CONVERTER_H
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