stabilize build system: depends, installer, boost/bdb fixes, cross targets groundwork
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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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// This file was modified by Oracle on 2017.
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// Modifications copyright (c) 2017 Oracle and/or its affiliates.
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// Contributed and/or modified by Adam Wulkiewicz, on behalf of Oracle
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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_BUFFER_HPP
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#define BOOST_GEOMETRY_ALGORITHMS_BUFFER_HPP
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#include <cstddef>
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#include <boost/numeric/conversion/cast.hpp>
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#include <boost/range.hpp>
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#include <boost/variant/apply_visitor.hpp>
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#include <boost/variant/static_visitor.hpp>
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#include <boost/variant/variant_fwd.hpp>
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#include <boost/geometry/algorithms/clear.hpp>
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#include <boost/geometry/algorithms/envelope.hpp>
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#include <boost/geometry/algorithms/is_empty.hpp>
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#include <boost/geometry/algorithms/not_implemented.hpp>
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#include <boost/geometry/arithmetic/arithmetic.hpp>
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#include <boost/geometry/geometries/concepts/check.hpp>
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#include <boost/geometry/geometries/box.hpp>
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#include <boost/geometry/util/math.hpp>
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#include <boost/geometry/algorithms/detail/buffer/buffer_inserter.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 buffer
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{
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template <typename BoxIn, typename BoxOut, typename T, std::size_t C, std::size_t D, std::size_t N>
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struct box_loop
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{
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typedef typename coordinate_type<BoxOut>::type coordinate_type;
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static inline void apply(BoxIn const& box_in, T const& distance, BoxOut& box_out)
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{
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coordinate_type d = distance;
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set<C, D>(box_out, get<C, D>(box_in) + d);
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box_loop<BoxIn, BoxOut, T, C, D + 1, N>::apply(box_in, distance, box_out);
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}
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};
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template <typename BoxIn, typename BoxOut, typename T, std::size_t C, std::size_t N>
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struct box_loop<BoxIn, BoxOut, T, C, N, N>
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{
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static inline void apply(BoxIn const&, T const&, BoxOut&) {}
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};
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// Extends a box with the same amount in all directions
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template<typename BoxIn, typename BoxOut, typename T>
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inline void buffer_box(BoxIn const& box_in, T const& distance, BoxOut& box_out)
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{
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assert_dimension_equal<BoxIn, BoxOut>();
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static const std::size_t N = dimension<BoxIn>::value;
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box_loop<BoxIn, BoxOut, T, min_corner, 0, N>::apply(box_in, -distance, box_out);
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box_loop<BoxIn, BoxOut, T, max_corner, 0, N>::apply(box_in, distance, box_out);
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}
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}} // namespace detail::buffer
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#endif // DOXYGEN_NO_DETAIL
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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 Input,
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typename Output,
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typename TagIn = typename tag<Input>::type,
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typename TagOut = typename tag<Output>::type
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>
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struct buffer: not_implemented<TagIn, TagOut>
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{};
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template <typename BoxIn, typename BoxOut>
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struct buffer<BoxIn, BoxOut, box_tag, box_tag>
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{
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template <typename Distance>
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static inline void apply(BoxIn const& box_in, Distance const& distance,
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Distance const& , BoxOut& box_out)
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{
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detail::buffer::buffer_box(box_in, distance, box_out);
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}
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};
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} // namespace dispatch
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#endif // DOXYGEN_NO_DISPATCH
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namespace resolve_variant {
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template <typename Geometry>
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struct buffer
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{
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template <typename Distance, typename GeometryOut>
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static inline void apply(Geometry const& geometry,
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Distance const& distance,
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Distance const& chord_length,
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GeometryOut& out)
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{
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dispatch::buffer<Geometry, GeometryOut>::apply(geometry, distance, chord_length, out);
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}
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};
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template <BOOST_VARIANT_ENUM_PARAMS(typename T)>
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struct buffer<boost::variant<BOOST_VARIANT_ENUM_PARAMS(T)> >
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{
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template <typename Distance, typename GeometryOut>
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struct visitor: boost::static_visitor<void>
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{
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Distance const& m_distance;
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Distance const& m_chord_length;
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GeometryOut& m_out;
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visitor(Distance const& distance,
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Distance const& chord_length,
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GeometryOut& out)
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: m_distance(distance),
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m_chord_length(chord_length),
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m_out(out)
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{}
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template <typename Geometry>
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void operator()(Geometry const& geometry) const
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{
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buffer<Geometry>::apply(geometry, m_distance, m_chord_length, m_out);
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}
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};
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template <typename Distance, typename GeometryOut>
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static inline void apply(
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boost::variant<BOOST_VARIANT_ENUM_PARAMS(T)> const& geometry,
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Distance const& distance,
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Distance const& chord_length,
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GeometryOut& out
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)
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{
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boost::apply_visitor(visitor<Distance, GeometryOut>(distance, chord_length, out), geometry);
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}
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};
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} // namespace resolve_variant
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/*!
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\brief \brief_calc{buffer}
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\ingroup buffer
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\details \details_calc{buffer, \det_buffer}.
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\tparam Input \tparam_geometry
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\tparam Output \tparam_geometry
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\tparam Distance \tparam_numeric
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\param geometry_in \param_geometry
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\param geometry_out \param_geometry
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\param distance The distance to be used for the buffer
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\param chord_length (optional) The length of the chord's in the generated arcs around points or bends
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\qbk{[include reference/algorithms/buffer.qbk]}
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*/
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template <typename Input, typename Output, typename Distance>
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inline void buffer(Input const& geometry_in, Output& geometry_out,
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Distance const& distance, Distance const& chord_length = -1)
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{
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concepts::check<Input const>();
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concepts::check<Output>();
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resolve_variant::buffer<Input>::apply(geometry_in, distance, chord_length, geometry_out);
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}
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/*!
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\brief \brief_calc{buffer}
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\ingroup buffer
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\details \details_calc{return_buffer, \det_buffer}. \details_return{buffer}.
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\tparam Input \tparam_geometry
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\tparam Output \tparam_geometry
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\tparam Distance \tparam_numeric
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\param geometry \param_geometry
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\param distance The distance to be used for the buffer
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\param chord_length (optional) The length of the chord's in the generated arcs
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around points or bends (RESERVED, NOT YET USED)
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\return \return_calc{buffer}
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*/
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template <typename Output, typename Input, typename Distance>
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Output return_buffer(Input const& geometry, Distance const& distance, Distance const& chord_length = -1)
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{
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concepts::check<Input const>();
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concepts::check<Output>();
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Output geometry_out;
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resolve_variant::buffer<Input>::apply(geometry, distance, chord_length, geometry_out);
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return geometry_out;
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}
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/*!
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\brief \brief_calc{buffer}
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\ingroup buffer
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\details \details_calc{buffer, \det_buffer}.
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\tparam GeometryIn \tparam_geometry
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\tparam MultiPolygon \tparam_geometry{MultiPolygon}
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\tparam DistanceStrategy A strategy defining distance (or radius)
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\tparam SideStrategy A strategy defining creation along sides
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\tparam JoinStrategy A strategy defining creation around convex corners
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\tparam EndStrategy A strategy defining creation at linestring ends
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\tparam PointStrategy A strategy defining creation around points
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\param geometry_in \param_geometry
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\param geometry_out output multi polygon (or std:: collection of polygons),
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will contain a buffered version of the input geometry
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\param distance_strategy The distance strategy to be used
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\param side_strategy The side strategy to be used
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\param join_strategy The join strategy to be used
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\param end_strategy The end strategy to be used
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\param point_strategy The point strategy to be used
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\qbk{distinguish,with strategies}
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\qbk{[include reference/algorithms/buffer_with_strategies.qbk]}
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*/
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template
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<
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typename GeometryIn,
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typename MultiPolygon,
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typename DistanceStrategy,
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typename SideStrategy,
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typename JoinStrategy,
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typename EndStrategy,
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typename PointStrategy
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>
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inline void buffer(GeometryIn const& geometry_in,
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MultiPolygon& geometry_out,
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DistanceStrategy const& distance_strategy,
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SideStrategy const& side_strategy,
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JoinStrategy const& join_strategy,
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EndStrategy const& end_strategy,
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PointStrategy const& point_strategy)
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{
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typedef typename boost::range_value<MultiPolygon>::type polygon_type;
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concepts::check<GeometryIn const>();
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concepts::check<polygon_type>();
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typedef typename point_type<GeometryIn>::type point_type;
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typedef typename rescale_policy_type<point_type>::type rescale_policy_type;
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geometry_out.clear();
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if (geometry::is_empty(geometry_in))
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{
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// Then output geometry is kept empty as well
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return;
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}
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model::box<point_type> box;
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geometry::envelope(geometry_in, box);
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geometry::buffer(box, box, distance_strategy.max_distance(join_strategy, end_strategy));
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typename strategy::intersection::services::default_strategy
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<
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typename cs_tag<GeometryIn>::type
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>::type intersection_strategy;
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rescale_policy_type rescale_policy
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= boost::geometry::get_rescale_policy<rescale_policy_type>(box);
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detail::buffer::buffer_inserter<polygon_type>(geometry_in, range::back_inserter(geometry_out),
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distance_strategy,
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side_strategy,
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join_strategy,
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end_strategy,
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point_strategy,
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intersection_strategy,
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rescale_policy);
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}
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}} // namespace boost::geometry
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#endif // BOOST_GEOMETRY_ALGORITHMS_BUFFER_HPP
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