65 lines
1.7 KiB
C++
65 lines
1.7 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_ALGORITHMS_DETAIL_CALCULATE_SUM_HPP
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#define BOOST_GEOMETRY_ALGORITHMS_DETAIL_CALCULATE_SUM_HPP
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#include <boost/range.hpp>
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#include <boost/typeof/typeof.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
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{
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template
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<
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typename ReturnType,
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typename Polygon,
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typename Strategy,
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typename Policy
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>
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class calculate_polygon_sum
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{
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template <typename Rings>
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static inline ReturnType sum_interior_rings(Rings const& rings, Strategy const& strategy)
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{
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ReturnType sum = ReturnType();
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for (BOOST_AUTO_TPL(it, boost::begin(rings)); it != boost::end(rings); ++it)
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{
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sum += Policy::apply(*it, strategy);
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}
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return sum;
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}
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public :
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static inline ReturnType apply(Polygon const& poly, Strategy const& strategy)
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{
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return Policy::apply(exterior_ring(poly), strategy)
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+ sum_interior_rings(interior_rings(poly), strategy)
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;
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}
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};
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} // namespace detail
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#endif // DOXYGEN_NO_DETAIL
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}} // namespace boost::geometry
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#endif // BOOST_GEOMETRY_ALGORITHMS_DETAIL_CALCULATE_SUM_HPP
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