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// Copyright (c) 2005-2008 INRIA Sophia-Antipolis (France).
// 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
// 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: svn+ssh://scm.gforge.inria.fr/svn/cgal/branches/next/Surface_mesher/include/CGAL/Robust_circumcenter_traits_3.h $
// $Id: Robust_circumcenter_traits_3.h 67117 2012-01-13 18:14:48Z lrineau $
//
//
// Author(s) : Mariette Yvinec <Mariette.Yvinec@sophia.inria.fr>
// Laurent Rineau <Laurent.Rineau@geometryfactory.com>
// This traits override Construct_circumcenter_3 and
// Construct_weighted_circumcenter_3
// to get robust ones when called on slivers
#ifndef CGAL_ROBUST_CIRCUMCENTER_TRAITS_3_H
#define CGAL_ROBUST_CIRCUMCENTER_TRAITS_3_H
#include <CGAL/number_utils_classes.h>
#include <CGAL/Cartesian_converter.h>
#include <CGAL/Robust_construction.h>
#include <CGAL/Exact_predicates_exact_constructions_kernel.h>
#include <CGAL/Regular_triangulation_euclidean_traits_3.h>
namespace CGAL {
template < typename K >
class Robust_construct_weighted_circumcenter_3
{
public:
typedef Exact_predicates_exact_constructions_kernel EK2;
typedef Regular_triangulation_euclidean_traits_3<EK2> EK;
typedef typename K::Weighted_point_3 Weighted_point_3;
typedef typename K::Bare_point Bare_point;
typedef typename K::FT FT;
typedef Bare_point result_type;
typedef Weighted_converter_3<Cartesian_converter<typename K::Kernel, EK2> > To_exact;
typedef Weighted_converter_3<Cartesian_converter<EK2, typename K::Kernel> > Back_from_exact;
Bare_point operator() ( const Weighted_point_3 & p,
const Weighted_point_3 & q,
const Weighted_point_3 & r,
const Weighted_point_3 & s) const
{
To_exact to_exact;
Back_from_exact back_from_exact;
EK::Construct_weighted_circumcenter_3
exact_weighted_circumcenter = EK().construct_weighted_circumcenter_3_object();
return back_from_exact(exact_weighted_circumcenter(to_exact(p),
to_exact(q),
to_exact(r),
to_exact(s)));
}
Bare_point operator() ( const Weighted_point_3 & p,
const Weighted_point_3 & q,
const Weighted_point_3 & r) const
{
To_exact to_exact;
Back_from_exact back_from_exact;
EK::Construct_weighted_circumcenter_3
exact_weighted_circumcenter = EK().construct_weighted_circumcenter_3_object();
return back_from_exact(exact_weighted_circumcenter(to_exact(p),
to_exact(q),
to_exact(r)));
}
Bare_point operator() ( const Weighted_point_3 & p,
const Weighted_point_3 & q) const
{
To_exact to_exact;
Back_from_exact Back_from_exact;
EK::Construct_weighted_circumcenter_3
exact_weighted_circumcenter = EK().construct_weighted_circumcenter_3_object();
return back_from_exact(exact_weighted_circumcenter(to_exact(p),
to_exact(q)));
}
};
template < class K>
class Robust_circumcenter_traits_3
: public K
{
typedef Exact_predicates_exact_constructions_kernel EK;
public:
typedef CGAL::Robust_construction<EK::Construct_circumcenter_3,
Cartesian_converter<K, EK>,
Cartesian_converter<EK, K>,
typename K::Point_3 > Construct_circumcenter_3;
typedef CGAL::Robust_construction<EK::Compute_squared_radius_3,
Cartesian_converter<K, EK>,
Cartesian_converter<EK, K>,
typename K::FT > Compute_squared_radius_3;
Construct_circumcenter_3
construct_circumcenter_3_object() const
{ return Construct_circumcenter_3(); }
Compute_squared_radius_3
compute_squared_radius_3_object() const
{ return Compute_squared_radius_3(); }
};
template < class K>
class Robust_weighted_circumcenter_traits_3
: public K
{
typedef Exact_predicates_exact_constructions_kernel EK;
public:
typedef typename Robust_circumcenter_traits_3<typename K::Kernel>::Construct_circumcenter_3 Construct_circumcenter_3;
typedef typename Robust_circumcenter_traits_3<K>::Compute_squared_radius_3 Compute_squared_radius_3;
Construct_circumcenter_3
construct_circumcenter_3_object() const
{ return Construct_circumcenter_3(); }
typedef CGAL::Robust_construct_weighted_circumcenter_3<K> Construct_weighted_circumcenter_3;
Construct_weighted_circumcenter_3
construct_weighted_circumcenter_3_object() const
{ return Construct_weighted_circumcenter_3(); }
Compute_squared_radius_3
compute_squared_radius_3_object() const
{ return Compute_squared_radius_3(); }
};
} //namespace CGAL
#endif //CGAL_ROBUST_CIRCUMCENTER_TRAITS_3_H
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