| // Boost.Geometry (aka GGL, Generic Geometry Library) |
| |
| // Copyright (c) 2007-2011 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 |