69 lines
1.9 KiB
C++
69 lines
1.9 KiB
C++
/*****************************************************************************
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*
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* This file is part of Mapnik (c++ mapping toolkit)
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*
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* Copyright (C) 2015 Artem Pavlenko
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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*
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*****************************************************************************/
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#ifndef MAPNIK_GEOMETRY_CENTROID_HPP
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#define MAPNIK_GEOMETRY_CENTROID_HPP
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#include <mapnik/geometry_impl.hpp>
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#include <mapnik/geometry_adapters.hpp>
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#include <boost/geometry/algorithms/centroid.hpp>
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namespace mapnik { namespace new_geometry {
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namespace detail {
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struct geometry_centroid
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{
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using result_type = bool;
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geometry_centroid(point & pt)
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: pt_(pt) {}
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result_type operator() (geometry const& geom) const
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{
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return mapnik::util::apply_visitor(*this, geom);
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}
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result_type operator() (geometry_collection const& collection) const
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{
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return false;
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}
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template <typename T>
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result_type operator() (T const& geom) const
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{
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boost::geometry::centroid(geom, pt_);
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return true;
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}
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point & pt_;
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};
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}
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inline bool centroid(mapnik::new_geometry::geometry const& geom, point & pt)
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{
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return detail::geometry_centroid(pt) (geom);
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}
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}}
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#endif // MAPNIK_GEOMETRY_CENTROID_HPP
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