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351 lines
8.7 KiB
351 lines
8.7 KiB
// 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_FOR_EACH_HPP |
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#define BOOST_GEOMETRY_ALGORITHMS_FOR_EACH_HPP |
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#include <algorithm> |
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#include <boost/range.hpp> |
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#include <boost/typeof/typeof.hpp> |
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#include <boost/geometry/core/exterior_ring.hpp> |
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#include <boost/geometry/core/interior_rings.hpp> |
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#include <boost/geometry/core/tag_cast.hpp> |
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#include <boost/geometry/geometries/concepts/check.hpp> |
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#include <boost/geometry/geometries/segment.hpp> |
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#include <boost/geometry/util/add_const_if_c.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 for_each |
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{ |
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template <typename Point, typename Functor, bool IsConst> |
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struct fe_point_per_point |
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{ |
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static inline Functor apply( |
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typename add_const_if_c<IsConst, Point>::type& point, Functor f) |
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{ |
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f(point); |
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return f; |
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} |
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}; |
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template <typename Point, typename Functor, bool IsConst> |
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struct fe_point_per_segment |
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{ |
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static inline Functor apply( |
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typename add_const_if_c<IsConst, Point>::type& point, Functor f) |
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{ |
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return f; |
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} |
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}; |
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template <typename Range, typename Functor, bool IsConst> |
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struct fe_range_per_point |
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{ |
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static inline Functor apply( |
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typename add_const_if_c<IsConst, Range>::type& range, |
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Functor f) |
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{ |
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return (std::for_each(boost::begin(range), boost::end(range), f)); |
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} |
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}; |
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template <typename Range, typename Functor, bool IsConst> |
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struct fe_range_per_segment |
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{ |
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static inline Functor apply( |
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typename add_const_if_c<IsConst, Range>::type& range, |
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Functor f) |
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{ |
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typedef typename add_const_if_c |
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< |
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IsConst, |
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typename point_type<Range>::type |
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>::type point_type; |
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BOOST_AUTO_TPL(it, boost::begin(range)); |
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BOOST_AUTO_TPL(previous, it++); |
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while(it != boost::end(range)) |
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{ |
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model::referring_segment<point_type> s(*previous, *it); |
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f(s); |
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previous = it++; |
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} |
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return f; |
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} |
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}; |
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template <typename Polygon, typename Functor, bool IsConst> |
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struct fe_polygon_per_point |
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{ |
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typedef typename add_const_if_c<IsConst, Polygon>::type poly_type; |
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static inline Functor apply(poly_type& poly, Functor f) |
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{ |
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typedef fe_range_per_point |
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< |
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typename ring_type<Polygon>::type, |
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Functor, |
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IsConst |
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> per_ring; |
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f = per_ring::apply(exterior_ring(poly), f); |
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typename interior_return_type<poly_type>::type rings |
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= interior_rings(poly); |
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for (BOOST_AUTO_TPL(it, boost::begin(rings)); it != boost::end(rings); ++it) |
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{ |
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f = per_ring::apply(*it, f); |
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} |
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return f; |
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} |
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}; |
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template <typename Polygon, typename Functor, bool IsConst> |
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struct fe_polygon_per_segment |
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{ |
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typedef typename add_const_if_c<IsConst, Polygon>::type poly_type; |
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static inline Functor apply(poly_type& poly, Functor f) |
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{ |
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typedef fe_range_per_segment |
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< |
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typename ring_type<Polygon>::type, |
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Functor, |
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IsConst |
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> per_ring; |
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f = per_ring::apply(exterior_ring(poly), f); |
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typename interior_return_type<poly_type>::type rings |
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= interior_rings(poly); |
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for (BOOST_AUTO_TPL(it, boost::begin(rings)); it != boost::end(rings); ++it) |
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{ |
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f = per_ring::apply(*it, f); |
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} |
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return f; |
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} |
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}; |
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}} // namespace detail::for_each |
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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 Geometry, |
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typename Functor, |
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bool IsConst |
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> |
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struct for_each_point {}; |
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template <typename Point, typename Functor, bool IsConst> |
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struct for_each_point<point_tag, Point, Functor, IsConst> |
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: detail::for_each::fe_point_per_point<Point, Functor, IsConst> |
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{}; |
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template <typename Linestring, typename Functor, bool IsConst> |
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struct for_each_point<linestring_tag, Linestring, Functor, IsConst> |
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: detail::for_each::fe_range_per_point<Linestring, Functor, IsConst> |
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{}; |
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template <typename Ring, typename Functor, bool IsConst> |
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struct for_each_point<ring_tag, Ring, Functor, IsConst> |
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: detail::for_each::fe_range_per_point<Ring, Functor, IsConst> |
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{}; |
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template <typename Polygon, typename Functor, bool IsConst> |
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struct for_each_point<polygon_tag, Polygon, Functor, IsConst> |
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: detail::for_each::fe_polygon_per_point<Polygon, Functor, IsConst> |
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{}; |
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template |
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< |
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typename Tag, |
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typename Geometry, |
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typename Functor, |
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bool IsConst |
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> |
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struct for_each_segment {}; |
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template <typename Point, typename Functor, bool IsConst> |
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struct for_each_segment<point_tag, Point, Functor, IsConst> |
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: detail::for_each::fe_point_per_segment<Point, Functor, IsConst> |
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{}; |
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template <typename Linestring, typename Functor, bool IsConst> |
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struct for_each_segment<linestring_tag, Linestring, Functor, IsConst> |
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: detail::for_each::fe_range_per_segment<Linestring, Functor, IsConst> |
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{}; |
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template <typename Ring, typename Functor, bool IsConst> |
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struct for_each_segment<ring_tag, Ring, Functor, IsConst> |
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: detail::for_each::fe_range_per_segment<Ring, Functor, IsConst> |
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{}; |
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template <typename Polygon, typename Functor, bool IsConst> |
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struct for_each_segment<polygon_tag, Polygon, Functor, IsConst> |
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: detail::for_each::fe_polygon_per_segment<Polygon, Functor, IsConst> |
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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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\brief \brf_for_each{point} |
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\details \det_for_each{point} |
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\ingroup for_each |
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\param geometry \param_geometry |
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\param f \par_for_each_f{const point} |
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\tparam Geometry \tparam_geometry |
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\tparam Functor \tparam_functor |
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\qbk{distinguish,const version} |
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\qbk{[heading Example]} |
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\qbk{[for_each_point_const] [for_each_point_const_output]} |
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*/ |
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template<typename Geometry, typename Functor> |
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inline Functor for_each_point(Geometry const& geometry, Functor f) |
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{ |
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concept::check<Geometry const>(); |
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return dispatch::for_each_point |
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< |
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typename tag_cast<typename tag<Geometry>::type, multi_tag>::type, |
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Geometry, |
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Functor, |
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true |
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>::apply(geometry, f); |
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} |
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/*! |
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\brief \brf_for_each{point} |
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\details \det_for_each{point} |
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\ingroup for_each |
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\param geometry \param_geometry |
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\param f \par_for_each_f{point} |
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\tparam Geometry \tparam_geometry |
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\tparam Functor \tparam_functor |
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\qbk{[heading Example]} |
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\qbk{[for_each_point] [for_each_point_output]} |
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*/ |
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template<typename Geometry, typename Functor> |
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inline Functor for_each_point(Geometry& geometry, Functor f) |
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{ |
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concept::check<Geometry>(); |
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return dispatch::for_each_point |
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< |
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typename tag_cast<typename tag<Geometry>::type, multi_tag>::type, |
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Geometry, |
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Functor, |
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false |
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>::apply(geometry, f); |
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} |
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/*! |
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\brief \brf_for_each{segment} |
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\details \det_for_each{segment} |
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\ingroup for_each |
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\param geometry \param_geometry |
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\param f \par_for_each_f{const segment} |
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\tparam Geometry \tparam_geometry |
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\tparam Functor \tparam_functor |
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\qbk{distinguish,const version} |
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\qbk{[heading Example]} |
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\qbk{[for_each_segment_const] [for_each_segment_const_output]} |
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*/ |
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template<typename Geometry, typename Functor> |
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inline Functor for_each_segment(Geometry const& geometry, Functor f) |
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{ |
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concept::check<Geometry const>(); |
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return dispatch::for_each_segment |
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< |
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typename tag_cast<typename tag<Geometry>::type, multi_tag>::type, |
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Geometry, |
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Functor, |
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true |
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>::apply(geometry, f); |
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} |
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/*! |
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\brief \brf_for_each{segment} |
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\details \det_for_each{segment} |
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\ingroup for_each |
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\param geometry \param_geometry |
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\param f \par_for_each_f{segment} |
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\tparam Geometry \tparam_geometry |
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\tparam Functor \tparam_functor |
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*/ |
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template<typename Geometry, typename Functor> |
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inline Functor for_each_segment(Geometry& geometry, Functor f) |
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{ |
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concept::check<Geometry>(); |
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return dispatch::for_each_segment |
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< |
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typename tag_cast<typename tag<Geometry>::type, multi_tag>::type, |
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Geometry, |
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Functor, |
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false |
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>::apply(geometry, f); |
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} |
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}} // namespace boost::geometry |
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#endif // BOOST_GEOMETRY_ALGORITHMS_FOR_EACH_HPP
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