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// Boost.Geometry (aka GGL, Generic Geometry Library)
// Copyright (c) 2008-2012 Bruno Lalande, Paris, France.
// Copyright (c) 2008-2012 Barend Gehrels, Amsterdam, the Netherlands.
// Copyright (c) 2009-2012 Mateusz Loskot, London, UK.
// Parts of Boost.Geometry are redesigned from Geodan's Geographic Library
// (geolib/GGL), copyright (c) 1995-2010 Geodan, Amsterdam, the Netherlands.
// Use, modification and distribution is subject to the Boost Software License,
// Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at
// http://www.boost.org/LICENSE_1_0.txt)
#ifndef BOOST_GEOMETRY_CORE_COORDINATE_SYSTEM_HPP
#define BOOST_GEOMETRY_CORE_COORDINATE_SYSTEM_HPP
#include <boost/mpl/assert.hpp>
#include <boost/type_traits/remove_const.hpp>
#include <boost/geometry/core/point_type.hpp>
namespace boost { namespace geometry
{
namespace traits
{
/*!
\brief Traits class defining the coordinate system of a point, important for strategy selection
\ingroup traits
\par Geometries:
- point
\par Specializations should provide:
- typedef CS type; (cs::cartesian, cs::spherical, etc)
*/
template <typename Point, typename Enable = void>
struct coordinate_system
{
BOOST_MPL_ASSERT_MSG
(
false, NOT_IMPLEMENTED_FOR_THIS_POINT_TYPE, (types<Point>)
);
};
} // namespace traits
#ifndef DOXYGEN_NO_DISPATCH
namespace core_dispatch
{
template <typename GeometryTag, typename G>
struct coordinate_system
{
typedef typename point_type<GeometryTag, G>::type P;
// Call its own specialization on point-tag
typedef typename coordinate_system<point_tag, P>::type type;
};
template <typename P>
struct coordinate_system<point_tag, P>
{
typedef typename traits::coordinate_system<P>::type type;
};
} // namespace core_dispatch
#endif
/*!
\brief \brief_meta{type, coordinate system (cartesian\, spherical\, etc), \meta_point_type}
\tparam Geometry \tparam_geometry
\ingroup core
\qbk{[include reference/core/coordinate_system.qbk]}
*/
template <typename Geometry>
struct coordinate_system
{
typedef typename boost::remove_const<Geometry>::type ncg;
typedef typename core_dispatch::coordinate_system
<
typename tag<Geometry>::type,
ncg
>::type type;
};
}} // namespace boost::geometry
#endif // BOOST_GEOMETRY_CORE_COORDINATE_SYSTEM_HPP
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