Added boost header
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Christophe Riccio
279
test/external/boost/geometry/algorithms/envelope.hpp
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279
test/external/boost/geometry/algorithms/envelope.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_ENVELOPE_HPP
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#define BOOST_GEOMETRY_ALGORITHMS_ENVELOPE_HPP
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#include <boost/mpl/assert.hpp>
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#include <boost/range.hpp>
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#include <boost/numeric/conversion/cast.hpp>
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#include <boost/geometry/algorithms/assign.hpp>
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#include <boost/geometry/algorithms/expand.hpp>
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#include <boost/geometry/core/cs.hpp>
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#include <boost/geometry/core/exterior_ring.hpp>
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#include <boost/geometry/geometries/concepts/check.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 envelope
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{
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/// Calculate envelope of an 2D or 3D segment
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template<typename Geometry, typename Box>
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struct envelope_expand_one
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{
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static inline void apply(Geometry const& geometry, Box& mbr)
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{
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assign_inverse(mbr);
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geometry::expand(mbr, geometry);
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}
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};
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/// Iterate through range (also used in multi*)
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template<typename Range, typename Box>
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inline void envelope_range_additional(Range const& range, Box& mbr)
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{
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typedef typename boost::range_iterator<Range const>::type iterator_type;
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for (iterator_type it = boost::begin(range);
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it != boost::end(range);
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++it)
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{
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geometry::expand(mbr, *it);
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}
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}
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/// Generic range dispatching struct
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template <typename Range, typename Box>
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struct envelope_range
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{
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/// Calculate envelope of range using a strategy
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static inline void apply(Range const& range, Box& mbr)
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{
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assign_inverse(mbr);
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envelope_range_additional(range, mbr);
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}
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};
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}} // namespace detail::envelope
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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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// Note, the strategy is for future use (less/greater -> compare spherical
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// using other methods), defaults are OK for now.
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// However, they are already in the template methods
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template
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<
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typename Tag1, typename Tag2,
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typename Geometry, typename Box,
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typename StrategyLess, typename StrategyGreater
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>
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struct envelope
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{
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BOOST_MPL_ASSERT_MSG
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(
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false, NOT_OR_NOT_YET_IMPLEMENTED_FOR_THIS_GEOMETRY_TYPE
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, (types<Geometry>)
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);
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};
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template
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<
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typename Point, typename Box,
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typename StrategyLess, typename StrategyGreater
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>
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struct envelope
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<
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point_tag, box_tag,
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Point, Box,
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StrategyLess, StrategyGreater
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>
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: detail::envelope::envelope_expand_one<Point, Box>
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{};
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template
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<
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typename BoxIn, typename BoxOut,
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typename StrategyLess, typename StrategyGreater
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>
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struct envelope
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<
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box_tag, box_tag,
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BoxIn, BoxOut,
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StrategyLess, StrategyGreater
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>
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: detail::envelope::envelope_expand_one<BoxIn, BoxOut>
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{};
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template
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<
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typename Segment, typename Box,
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typename StrategyLess, typename StrategyGreater
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>
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struct envelope
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<
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segment_tag, box_tag,
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Segment, Box,
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StrategyLess, StrategyGreater
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>
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: detail::envelope::envelope_expand_one<Segment, Box>
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{};
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template
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<
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typename Linestring, typename Box,
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typename StrategyLess, typename StrategyGreater
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>
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struct envelope
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<
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linestring_tag, box_tag,
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Linestring, Box,
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StrategyLess, StrategyGreater
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>
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: detail::envelope::envelope_range<Linestring, Box>
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{};
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template
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<
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typename Ring, typename Box,
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typename StrategyLess, typename StrategyGreater
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>
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struct envelope
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<
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ring_tag, box_tag,
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Ring, Box,
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StrategyLess, StrategyGreater
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>
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: detail::envelope::envelope_range<Ring, Box>
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{};
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template
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<
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typename Polygon, typename Box,
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typename StrategyLess, typename StrategyGreater
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>
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struct envelope
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<
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polygon_tag, box_tag,
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Polygon, Box,
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StrategyLess, StrategyGreater
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>
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{
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static inline void apply(Polygon const& poly, Box& mbr)
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{
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// For polygon, inspecting outer ring is sufficient
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detail::envelope::envelope_range
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<
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typename ring_type<Polygon>::type,
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Box
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>::apply(exterior_ring(poly), mbr);
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}
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};
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} // namespace dispatch
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#endif
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/*!
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\brief \brief_calc{envelope}
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\ingroup envelope
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\details \details_calc{envelope,\det_envelope}.
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\tparam Geometry \tparam_geometry
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\tparam Box \tparam_box
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\param geometry \param_geometry
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\param mbr \param_box \param_set{envelope}
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\par Example:
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Example showing envelope calculation, using point_ll latlong points
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\dontinclude doxygen_1.cpp
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\skip example_envelope_polygon
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\line {
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\until }
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\qbk{
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[heading Example]
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[envelope] [envelope_output]
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}
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*/
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template<typename Geometry, typename Box>
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inline void envelope(Geometry const& geometry, Box& mbr)
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{
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concept::check<Geometry const>();
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concept::check<Box>();
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dispatch::envelope
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<
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typename tag<Geometry>::type, typename tag<Box>::type,
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Geometry, Box,
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void, void
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>::apply(geometry, mbr);
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}
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/*!
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\brief \brief_calc{envelope}
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\ingroup envelope
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\details \details_calc{return_envelope,\det_envelope}. \details_return{envelope}
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\tparam Box \tparam_box
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\tparam Geometry \tparam_geometry
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\param geometry \param_geometry
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\return \return_calc{envelope}
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\qbk{
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[heading Example]
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[return_envelope] [return_envelope_output]
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}
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*/
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template<typename Box, typename Geometry>
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inline Box return_envelope(Geometry const& geometry)
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{
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concept::check<Geometry const>();
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concept::check<Box>();
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Box mbr;
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dispatch::envelope
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<
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typename tag<Geometry>::type, typename tag<Box>::type,
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Geometry, Box,
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void, void
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>::apply(geometry, mbr);
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return mbr;
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}
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}} // namespace boost::geometry
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#endif // BOOST_GEOMETRY_ALGORITHMS_ENVELOPE_HPP
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