Added boost header
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Christophe Riccio
319
test/external/boost/geometry/algorithms/expand.hpp
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319
test/external/boost/geometry/algorithms/expand.hpp
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// 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_EXPAND_HPP
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#define BOOST_GEOMETRY_ALGORITHMS_EXPAND_HPP
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#include <cstddef>
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#include <boost/numeric/conversion/cast.hpp>
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#include <boost/geometry/core/coordinate_dimension.hpp>
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#include <boost/geometry/geometries/concepts/check.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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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 Box, typename Point,
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typename StrategyLess, typename StrategyGreater,
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std::size_t Dimension, std::size_t DimensionCount
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>
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struct point_loop
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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, Point, 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, Point, Dimension
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>::type greater_type;
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typedef typename select_coordinate_type<Point, Box>::type coordinate_type;
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static inline void apply(Box& box, Point const& source)
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{
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less_type less;
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greater_type greater;
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coordinate_type const coord = get<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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point_loop
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<
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Box, Point,
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StrategyLess, StrategyGreater,
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Dimension + 1, DimensionCount
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>::apply(box, source);
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}
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};
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template
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<
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typename Box, typename Point,
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typename StrategyLess, typename StrategyGreater,
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std::size_t DimensionCount
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>
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struct point_loop
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<
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Box, Point,
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StrategyLess, StrategyGreater,
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DimensionCount, DimensionCount
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>
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{
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static inline void apply(Box&, Point const&) {}
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};
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template
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<
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typename Box, typename Geometry,
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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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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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static inline void apply(Box& box, Geometry const& source)
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{
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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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Box, Geometry,
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StrategyLess, StrategyGreater,
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Index, Dimension + 1, DimensionCount
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>::apply(box, source);
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}
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};
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template
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<
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typename Box, typename Geometry,
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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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Box, Geometry,
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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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static inline void apply(Box&, Geometry 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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typename Box, typename Geometry,
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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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static inline void apply(Box& box, Geometry const& geometry)
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{
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indexed_loop
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<
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Box, Geometry,
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StrategyLess, StrategyGreater,
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0, 0, dimension<Geometry>::type::value
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>::apply(box, geometry);
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indexed_loop
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<
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Box, Geometry,
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StrategyLess, StrategyGreater,
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1, 0, dimension<Geometry>::type::value
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>::apply(box, geometry);
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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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#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 Tag,
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typename BoxOut, typename Geometry,
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typename StrategyLess, typename StrategyGreater
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>
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struct expand
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{};
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// Box + point -> new box containing also point
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template
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<
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typename BoxOut, typename Point,
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typename StrategyLess, typename StrategyGreater
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>
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struct expand<point_tag, BoxOut, Point, StrategyLess, StrategyGreater>
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: detail::expand::point_loop
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<
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BoxOut, Point,
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StrategyLess, StrategyGreater,
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0, dimension<Point>::type::value
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>
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{};
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// Box + box -> new box containing two input boxes
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template
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<
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typename BoxOut, typename BoxIn,
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typename StrategyLess, typename StrategyGreater
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>
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struct expand<box_tag, BoxOut, BoxIn, StrategyLess, StrategyGreater>
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: detail::expand::expand_indexed
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<BoxOut, BoxIn, StrategyLess, StrategyGreater>
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{};
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template
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<
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typename Box, typename Segment,
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typename StrategyLess, typename StrategyGreater
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>
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struct expand<segment_tag, Box, Segment, StrategyLess, StrategyGreater>
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: detail::expand::expand_indexed
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<Box, Segment, StrategyLess, StrategyGreater>
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{};
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} // namespace dispatch
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#endif // DOXYGEN_NO_DISPATCH
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/***
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*!
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\brief Expands a box using the extend (envelope) of another geometry (box, point)
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\ingroup expand
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\tparam Box type of the box
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\tparam Geometry of second geometry, to be expanded with the box
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\param box box to expand another geometry with, might be changed
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\param geometry other geometry
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\param strategy_less
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\param strategy_greater
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\note Strategy is currently ignored
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*
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template
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<
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typename Box, typename Geometry,
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typename StrategyLess, typename StrategyGreater
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>
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inline void expand(Box& box, Geometry const& geometry,
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StrategyLess const& strategy_less,
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StrategyGreater const& strategy_greater)
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{
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concept::check_concepts_and_equal_dimensions<Box, Geometry const>();
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dispatch::expand
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<
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typename tag<Geometry>::type,
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Box,
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Geometry,
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StrategyLess, StrategyGreater
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>::apply(box, geometry);
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}
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***/
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/*!
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\brief Expands a box using the bounding box (envelope) of another geometry (box, point)
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\ingroup expand
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\tparam Box type of the box
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\tparam Geometry \tparam_geometry
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\param box box to be expanded using another geometry, mutable
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\param geometry \param_geometry geometry which envelope (bounding box) will be added to the box
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\qbk{[include reference/algorithms/expand.qbk]}
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*/
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template <typename Box, typename Geometry>
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inline void expand(Box& box, Geometry const& geometry)
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{
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concept::check_concepts_and_equal_dimensions<Box, Geometry const>();
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dispatch::expand
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<
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typename tag<Geometry>::type,
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Box, Geometry,
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strategy::compare::default_strategy,
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strategy::compare::default_strategy
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>::apply(box, geometry);
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}
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}} // namespace boost::geometry
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#endif // BOOST_GEOMETRY_ALGORITHMS_EXPAND_HPP
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