118 lines
2.8 KiB
C++
118 lines
2.8 KiB
C++
// Boost.Geometry (aka GGL, Generic Geometry Library)
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// Copyright (c) 2007-2011 Barend Gehrels, Amsterdam, the Netherlands.
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// Copyright (c) 2008-2011 Bruno Lalande, Paris, France.
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// Copyright (c) 2009-2011 Mateusz Loskot, London, UK.
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// Parts of Boost.Geometry are redesigned from Geodan's Geographic Library
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// (geolib/GGL), copyright (c) 1995-2010 Geodan, Amsterdam, the Netherlands.
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// Use, modification and distribution is subject to the Boost Software License,
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// Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at
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// http://www.boost.org/LICENSE_1_0.txt)
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#ifndef BOOST_GEOMETRY_MULTI_ALGORITHMS_ENVELOPE_HPP
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#define BOOST_GEOMETRY_MULTI_ALGORITHMS_ENVELOPE_HPP
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#include <vector>
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#include <boost/range/metafunctions.hpp>
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#include <boost/geometry/core/exterior_ring.hpp>
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#include <boost/geometry/algorithms/envelope.hpp>
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#include <boost/geometry/multi/core/point_type.hpp>
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namespace boost { namespace geometry
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{
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#ifndef DOXYGEN_NO_DETAIL
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namespace detail { namespace envelope
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{
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template<typename MultiLinestring, typename Box>
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struct envelope_multi_linestring
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{
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static inline void apply(MultiLinestring const& mp, Box& mbr)
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{
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assign_inverse(mbr);
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for (typename boost::range_iterator<MultiLinestring const>::type
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it = mp.begin();
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it != mp.end();
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++it)
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{
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envelope_range_additional(*it, mbr);
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}
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}
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};
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// version for multi_polygon: outer ring's of all polygons
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template<typename MultiPolygon, typename Box>
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struct envelope_multi_polygon
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{
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static inline void apply(MultiPolygon const& mp, Box& mbr)
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{
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assign_inverse(mbr);
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for (typename boost::range_const_iterator<MultiPolygon>::type
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it = mp.begin();
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it != mp.end();
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++it)
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{
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envelope_range_additional(exterior_ring(*it), mbr);
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}
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}
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};
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}} // namespace detail::envelope
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#endif
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#ifndef DOXYGEN_NO_DISPATCH
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namespace dispatch
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{
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template
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<
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typename Multi, typename Box,
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typename StrategyLess, typename StrategyGreater
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>
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struct envelope<multi_point_tag, box_tag, Multi, Box, StrategyLess, StrategyGreater>
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: detail::envelope::envelope_range<Multi, Box>
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{};
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template
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<
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typename Multi, typename Box,
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typename StrategyLess, typename StrategyGreater
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>
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struct envelope<multi_linestring_tag, box_tag, Multi, Box, StrategyLess, StrategyGreater>
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: detail::envelope::envelope_multi_linestring<Multi, Box>
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{};
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template
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<
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typename Multi, typename Box,
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typename StrategyLess, typename StrategyGreater
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>
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struct envelope<multi_polygon_tag, box_tag, Multi, Box, StrategyLess, StrategyGreater>
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: detail::envelope::envelope_multi_polygon<Multi, Box>
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{};
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} // namespace dispatch
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#endif
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}} // namespace boost::geometry
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#endif // BOOST_GEOMETRY_MULTI_ALGORITHMS_ENVELOPE_HPP
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