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// Boost.Geometry (aka GGL, Generic Geometry Library)
// Copyright (c) 2007-2012 Barend Gehrels, 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_ALGORITHMS_DETAIL_OVERLAY_GET_RING_HPP
#define BOOST_GEOMETRY_MULTI_ALGORITHMS_DETAIL_OVERLAY_GET_RING_HPP
#include <boost/assert.hpp>
#include <boost/range.hpp>
#include <boost/geometry/algorithms/detail/overlay/get_ring.hpp>
#include <boost/geometry/multi/core/ring_type.hpp>
namespace boost { namespace geometry
{
#ifndef DOXYGEN_NO_DETAIL
namespace detail { namespace overlay
{
template<>
struct get_ring<multi_polygon_tag>
{
template<typename MultiPolygon>
static inline typename ring_type<MultiPolygon>::type const& apply(
ring_identifier const& id,
MultiPolygon const& multi_polygon)
{
BOOST_ASSERT
(
id.multi_index >= 0
&& id.multi_index < boost::size(multi_polygon)
);
return get_ring<polygon_tag>::apply(id,
multi_polygon[id.multi_index]);
}
};
}} // namespace detail::overlay
#endif // DOXYGEN_NO_DETAIL
}} // namespace boost::geometry
#endif // BOOST_GEOMETRY_MULTI_ALGORITHMS_DETAIL_OVERLAY_GET_RING_HPP
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