boost/geometry/multi/core/point_order.hpp

// Boost.Geometry (aka GGL, Generic Geometry Library)

// Copyright (c) 2007-2011 Barend Gehrels, Amsterdam, the Netherlands.
// Copyright (c) 2008-2011 Bruno Lalande, Paris, France.
// Copyright (c) 2009-2011 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_MULTI_CORE_POINT_ORDER_HPP
#define BOOST_GEOMETRY_MULTI_CORE_POINT_ORDER_HPP


#include <boost/range.hpp>

#include <boost/geometry/core/point_order.hpp>
#include <boost/geometry/multi/core/tags.hpp>

namespace boost { namespace geometry
{


#ifndef DOXYGEN_NO_DISPATCH
namespace core_dispatch
{

template <typename Multi>
struct point_order<multi_point_tag, Multi>
    : public detail::point_order::clockwise {};

template <typename Multi>
struct point_order<multi_linestring_tag, Multi>
    : public detail::point_order::clockwise {};


// Specialization for multi_polygon: the order is the order of its polygons
template <typename MultiPolygon>
struct point_order<multi_polygon_tag, MultiPolygon>
{
    static const order_selector value = core_dispatch::point_order
        <
            polygon_tag,
            typename boost::range_value<MultiPolygon>::type
        >::value ;
};

} // namespace core_dispatch
#endif // DOXYGEN_NO_DISPATCH


}} // namespace boost::geometry

#endif // BOOST_GEOMETRY_MULTI_CORE_POINT_ORDER_HPP