148 lines
4.1 KiB
C++
148 lines
4.1 KiB
C++
// Boost.Geometry (aka GGL, Generic Geometry Library)
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// Copyright (c) 2007-2015 Barend Gehrels, Amsterdam, the Netherlands.
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// Copyright (c) 2008-2015 Bruno Lalande, Paris, France.
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// Copyright (c) 2009-2015 Mateusz Loskot, London, UK.
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// Copyright (c) 2014-2015 Samuel Debionne, Grenoble, France.
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// This file was modified by Oracle on 2015, 2016.
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// Modifications copyright (c) 2015-2016, 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 Menelaos Karavelas, 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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// Distributed under the Boost Software License, Version 1.0.
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// (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_EXPAND_INDEXED_HPP
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#define BOOST_GEOMETRY_ALGORITHMS_DETAIL_EXPAND_INDEXED_HPP
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#include <cstddef>
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#include <boost/geometry/core/access.hpp>
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#include <boost/geometry/core/tags.hpp>
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#include <boost/geometry/util/select_coordinate_type.hpp>
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#include <boost/geometry/strategies/compare.hpp>
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#include <boost/geometry/policies/compare.hpp>
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#include <boost/geometry/algorithms/dispatch/expand.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 expand
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{
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template
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<
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typename StrategyLess, typename StrategyGreater,
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std::size_t Index,
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std::size_t Dimension, std::size_t DimensionCount
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>
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struct indexed_loop
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{
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template <typename Box, typename Geometry, typename Strategy>
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static inline void apply(Box& box, Geometry const& source, Strategy const& strategy)
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{
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typedef typename strategy::compare::detail::select_strategy
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<
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StrategyLess, 1, Box, Dimension
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>::type less_type;
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typedef typename strategy::compare::detail::select_strategy
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<
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StrategyGreater, -1, Box, Dimension
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>::type greater_type;
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typedef typename select_coordinate_type
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<
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Box,
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Geometry
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>::type coordinate_type;
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less_type less;
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greater_type greater;
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coordinate_type const coord = get<Index, Dimension>(source);
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if (less(coord, get<min_corner, Dimension>(box)))
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{
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set<min_corner, Dimension>(box, coord);
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}
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if (greater(coord, get<max_corner, Dimension>(box)))
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{
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set<max_corner, Dimension>(box, coord);
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}
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indexed_loop
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<
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StrategyLess, StrategyGreater,
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Index, Dimension + 1, DimensionCount
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>::apply(box, source, strategy);
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}
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};
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template
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<
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typename StrategyLess, typename StrategyGreater,
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std::size_t Index, std::size_t DimensionCount
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>
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struct indexed_loop
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<
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StrategyLess, StrategyGreater,
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Index, DimensionCount, DimensionCount
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>
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{
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template <typename Box, typename Geometry, typename Strategy>
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static inline void apply(Box&, Geometry const&, Strategy const&) {}
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};
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// Changes a box such that the other box is also contained by the box
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template
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<
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std::size_t Dimension, std::size_t DimensionCount,
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typename StrategyLess, typename StrategyGreater
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>
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struct expand_indexed
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{
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template <typename Box, typename Geometry, typename Strategy>
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static inline void apply(Box& box,
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Geometry const& geometry,
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Strategy const& strategy)
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{
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indexed_loop
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<
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StrategyLess, StrategyGreater,
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0, Dimension, DimensionCount
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>::apply(box, geometry, strategy);
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indexed_loop
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<
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StrategyLess, StrategyGreater,
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1, Dimension, DimensionCount
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>::apply(box, geometry, strategy);
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}
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};
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}} // namespace detail::expand
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#endif // DOXYGEN_NO_DETAIL
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}} // namespace boost::geometry
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#endif // BOOST_GEOMETRY_ALGORITHMS_DETAIL_EXPAND_INDEXED_HPP
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