65 lines
2.1 KiB
C++
65 lines
2.1 KiB
C++
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// Boost.Geometry (aka GGL, Generic Geometry Library)
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// Copyright (c) 2007-2012 Barend Gehrels, Amsterdam, the Netherlands.
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// Copyright (c) 2008-2012 Bruno Lalande, Paris, France.
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// Copyright (c) 2009-2012 Mateusz Loskot, London, UK.
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// Copyright (c) 2014 Adam Wulkiewicz, Lodz, Poland.
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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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// This file was modified by Oracle on 2016-2020.
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// Modifications copyright (c) 2016-2020 Oracle and/or its affiliates.
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// Contributed and/or modified by Vissarion Fysikopoulos, on behalf of Oracle
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// Contributed and/or modified by Adam Wulkiewicz, on behalf of Oracle
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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/begin.hpp>
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#include <boost/range/end.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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class calculate_polygon_sum
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{
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template <typename ReturnType, typename Policy, typename Rings, typename Strategy>
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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(0);
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for (typename boost::range_iterator<Rings const>::type
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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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template <typename ReturnType, typename Policy, typename Polygon, typename Strategy>
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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<ReturnType, Policy>(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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