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Diffstat (limited to 'boost/geometry/algorithms/detail/distance/point_to_geometry.hpp')
| -rw-r--r-- | boost/geometry/algorithms/detail/distance/point_to_geometry.hpp | 518 |
1 files changed, 518 insertions, 0 deletions
diff --git a/boost/geometry/algorithms/detail/distance/point_to_geometry.hpp b/boost/geometry/algorithms/detail/distance/point_to_geometry.hpp new file mode 100644 index 0000000000..ab5de3d9b2 --- /dev/null +++ b/boost/geometry/algorithms/detail/distance/point_to_geometry.hpp @@ -0,0 +1,518 @@ +// Boost.Geometry (aka GGL, Generic Geometry Library) + +// Copyright (c) 2007-2014 Barend Gehrels, Amsterdam, the Netherlands. +// Copyright (c) 2008-2014 Bruno Lalande, Paris, France. +// Copyright (c) 2009-2014 Mateusz Loskot, London, UK. +// Copyright (c) 2013-2014 Adam Wulkiewicz, Lodz, Poland. + +// This file was modified by Oracle on 2014. +// Modifications copyright (c) 2014, Oracle and/or its affiliates. + +// Contributed and/or modified by Menelaos Karavelas, on behalf of Oracle + +// Parts of Boost.Geometry are redesigned from Geodan's Geographic Library +// (geolib/GGL), copyright (c) 1995-2010 Geodan, Amsterdam, the Netherlands. + +// Use, modification and distribution is subject to the Boost Software License, +// Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at +// http://www.boost.org/LICENSE_1_0.txt) + +#ifndef BOOST_GEOMETRY_ALGORITHMS_DETAIL_DISTANCE_POINT_TO_GEOMETRY_HPP +#define BOOST_GEOMETRY_ALGORITHMS_DETAIL_DISTANCE_POINT_TO_GEOMETRY_HPP + +#include <iterator> + +#include <boost/core/ignore_unused.hpp> +#include <boost/range.hpp> +#include <boost/type_traits/is_same.hpp> + +#include <boost/geometry/core/closure.hpp> +#include <boost/geometry/core/point_type.hpp> +#include <boost/geometry/core/exterior_ring.hpp> +#include <boost/geometry/core/interior_rings.hpp> +#include <boost/geometry/core/tag.hpp> +#include <boost/geometry/core/tags.hpp> + +#include <boost/geometry/util/math.hpp> + +#include <boost/geometry/strategies/distance.hpp> +#include <boost/geometry/strategies/tags.hpp> + +#include <boost/geometry/algorithms/assign.hpp> +#include <boost/geometry/algorithms/covered_by.hpp> +#include <boost/geometry/algorithms/within.hpp> + +#include <boost/geometry/algorithms/detail/closest_feature/geometry_to_range.hpp> +#include <boost/geometry/algorithms/detail/closest_feature/point_to_range.hpp> +#include <boost/geometry/algorithms/detail/distance/is_comparable.hpp> +#include <boost/geometry/algorithms/detail/distance/iterator_selector.hpp> + +#include <boost/geometry/algorithms/dispatch/distance.hpp> + + +namespace boost { namespace geometry +{ + +#ifndef DOXYGEN_NO_DETAIL +namespace detail { namespace distance +{ + + +template <typename P1, typename P2, typename Strategy> +struct point_to_point +{ + static inline + typename strategy::distance::services::return_type<Strategy, P1, P2>::type + apply(P1 const& p1, P2 const& p2, Strategy const& strategy) + { + boost::ignore_unused(strategy); + return strategy.apply(p1, p2); + } +}; + + +template +< + typename Point, + typename Range, + closure_selector Closure, + typename Strategy +> +class point_to_range +{ +private: + typedef typename strategy::distance::services::comparable_type + < + Strategy + >::type comparable_strategy; + + typedef detail::closest_feature::point_to_point_range + < + Point, Range, Closure, comparable_strategy + > point_to_point_range; + +public: + typedef typename strategy::distance::services::return_type + < + Strategy, + Point, + typename boost::range_value<Range>::type + >::type return_type; + + static inline return_type apply(Point const& point, Range const& range, + Strategy const& strategy) + { + return_type const zero = return_type(0); + + if (boost::size(range) == 0) + { + return zero; + } + + namespace sds = strategy::distance::services; + + typename sds::return_type + < + comparable_strategy, + Point, + typename point_type<Range>::type + >::type cd_min; + + std::pair + < + typename boost::range_iterator<Range const>::type, + typename boost::range_iterator<Range const>::type + > it_pair + = point_to_point_range::apply(point, + boost::begin(range), + boost::end(range), + sds::get_comparable + < + Strategy + >::apply(strategy), + cd_min); + + return + is_comparable<Strategy>::value + ? + cd_min + : + strategy.apply(point, *it_pair.first, *it_pair.second); + } +}; + + +template +< + typename Point, + typename Ring, + closure_selector Closure, + typename Strategy +> +struct point_to_ring +{ + typedef typename strategy::distance::services::return_type + < + Strategy, Point, typename point_type<Ring>::type + >::type return_type; + + static inline return_type apply(Point const& point, + Ring const& ring, + Strategy const& strategy) + { + if (geometry::within(point, ring)) + { + return return_type(0); + } + + return point_to_range + < + Point, Ring, closure<Ring>::value, Strategy + >::apply(point, ring, strategy); + } +}; + + +template +< + typename Point, + typename Polygon, + closure_selector Closure, + typename Strategy +> +class point_to_polygon +{ +public: + typedef typename strategy::distance::services::return_type + < + Strategy, Point, typename point_type<Polygon>::type + >::type return_type; + +private: + typedef point_to_range + < + Point, typename ring_type<Polygon>::type, Closure, Strategy + > per_ring; + + struct distance_to_interior_rings + { + template <typename InteriorRingIterator> + static inline return_type apply(Point const& point, + InteriorRingIterator first, + InteriorRingIterator last, + Strategy const& strategy) + { + for (InteriorRingIterator it = first; it != last; ++it) + { + if (geometry::within(point, *it)) + { + // the point is inside a polygon hole, so its distance + // to the polygon its distance to the polygon's + // hole boundary + return per_ring::apply(point, *it, strategy); + } + } + return 0; + } + + template <typename InteriorRings> + static inline return_type apply(Point const& point, + InteriorRings const& interior_rings, + Strategy const& strategy) + { + return apply(point, + boost::begin(interior_rings), + boost::end(interior_rings), + strategy); + } + }; + + +public: + static inline return_type apply(Point const& point, + Polygon const& polygon, + Strategy const& strategy) + { + if (!geometry::covered_by(point, exterior_ring(polygon))) + { + // the point is outside the exterior ring, so its distance + // to the polygon is its distance to the polygon's exterior ring + return per_ring::apply(point, exterior_ring(polygon), strategy); + } + + // Check interior rings + return distance_to_interior_rings::apply(point, + interior_rings(polygon), + strategy); + } +}; + + +template +< + typename Point, + typename MultiGeometry, + typename Strategy, + bool CheckCoveredBy = boost::is_same + < + typename tag<MultiGeometry>::type, multi_polygon_tag + >::value +> +class point_to_multigeometry +{ +private: + typedef detail::closest_feature::geometry_to_range geometry_to_range; + +public: + typedef typename strategy::distance::services::return_type + < + Strategy, + Point, + typename point_type<MultiGeometry>::type + >::type return_type; + + static inline return_type apply(Point const& point, + MultiGeometry const& multigeometry, + Strategy const& strategy) + { + typedef iterator_selector<MultiGeometry const> selector_type; + + namespace sds = strategy::distance::services; + + typename sds::return_type + < + typename sds::comparable_type<Strategy>::type, + Point, + typename point_type<MultiGeometry>::type + >::type cd; + + typename selector_type::iterator_type it_min + = geometry_to_range::apply(point, + selector_type::begin(multigeometry), + selector_type::end(multigeometry), + sds::get_comparable + < + Strategy + >::apply(strategy), + cd); + + return + is_comparable<Strategy>::value + ? + cd + : + dispatch::distance + < + Point, + typename std::iterator_traits + < + typename selector_type::iterator_type + >::value_type, + Strategy + >::apply(point, *it_min, strategy); + } +}; + + +// this is called only for multipolygons, hence the change in the +// template parameter name MultiGeometry to MultiPolygon +template <typename Point, typename MultiPolygon, typename Strategy> +struct point_to_multigeometry<Point, MultiPolygon, Strategy, true> +{ + typedef typename strategy::distance::services::return_type + < + Strategy, + Point, + typename point_type<MultiPolygon>::type + >::type return_type; + + static inline return_type apply(Point const& point, + MultiPolygon const& multipolygon, + Strategy const& strategy) + { + if (geometry::covered_by(point, multipolygon)) + { + return 0; + } + + return point_to_multigeometry + < + Point, MultiPolygon, Strategy, false + >::apply(point, multipolygon, strategy); + } +}; + + +}} // namespace detail::distance +#endif // DOXYGEN_NO_DETAIL + + + + +#ifndef DOXYGEN_NO_DISPATCH +namespace dispatch +{ + + +// Point-point +template <typename P1, typename P2, typename Strategy> +struct distance + < + P1, P2, Strategy, point_tag, point_tag, + strategy_tag_distance_point_point, false + > : detail::distance::point_to_point<P1, P2, Strategy> +{}; + + +// Point-line version 2, where point-segment strategy is specified +template <typename Point, typename Linestring, typename Strategy> +struct distance + < + Point, Linestring, Strategy, point_tag, linestring_tag, + strategy_tag_distance_point_segment, false + > : detail::distance::point_to_range<Point, Linestring, closed, Strategy> +{}; + + +// Point-ring , where point-segment strategy is specified +template <typename Point, typename Ring, typename Strategy> +struct distance + < + Point, Ring, Strategy, point_tag, ring_tag, + strategy_tag_distance_point_segment, false + > : detail::distance::point_to_ring + < + Point, Ring, closure<Ring>::value, Strategy + > +{}; + + +// Point-polygon , where point-segment strategy is specified +template <typename Point, typename Polygon, typename Strategy> +struct distance + < + Point, Polygon, Strategy, point_tag, polygon_tag, + strategy_tag_distance_point_segment, false + > : detail::distance::point_to_polygon + < + Point, Polygon, closure<Polygon>::value, Strategy + > +{}; + + +// Point-segment version 2, with point-segment strategy +template <typename Point, typename Segment, typename Strategy> +struct distance + < + Point, Segment, Strategy, point_tag, segment_tag, + strategy_tag_distance_point_segment, false + > +{ + static inline typename strategy::distance::services::return_type + < + Strategy, Point, typename point_type<Segment>::type + >::type apply(Point const& point, + Segment const& segment, + Strategy const& strategy) + { + typename point_type<Segment>::type p[2]; + geometry::detail::assign_point_from_index<0>(segment, p[0]); + geometry::detail::assign_point_from_index<1>(segment, p[1]); + + boost::ignore_unused(strategy); + return strategy.apply(point, p[0], p[1]); + } +}; + + +template <typename Point, typename Box, typename Strategy> +struct distance + < + Point, Box, Strategy, point_tag, box_tag, + strategy_tag_distance_point_box, false + > +{ + static inline typename strategy::distance::services::return_type + < + Strategy, Point, typename point_type<Box>::type + >::type + apply(Point const& point, Box const& box, Strategy const& strategy) + { + boost::ignore_unused(strategy); + return strategy.apply(point, box); + } +}; + + +template<typename Point, typename MultiPoint, typename Strategy> +struct distance + < + Point, MultiPoint, Strategy, point_tag, multi_point_tag, + strategy_tag_distance_point_point, false + > : detail::distance::point_to_multigeometry + < + Point, MultiPoint, Strategy + > +{}; + + +template<typename Point, typename MultiLinestring, typename Strategy> +struct distance + < + Point, MultiLinestring, Strategy, point_tag, multi_linestring_tag, + strategy_tag_distance_point_segment, false + > : detail::distance::point_to_multigeometry + < + Point, MultiLinestring, Strategy + > +{}; + + +template<typename Point, typename MultiPolygon, typename Strategy> +struct distance + < + Point, MultiPolygon, Strategy, point_tag, multi_polygon_tag, + strategy_tag_distance_point_segment, false + > : detail::distance::point_to_multigeometry + < + Point, MultiPolygon, Strategy + > +{}; + + +template <typename Point, typename Linear, typename Strategy> +struct distance + < + Point, Linear, Strategy, point_tag, linear_tag, + strategy_tag_distance_point_segment, false + > : distance + < + Point, Linear, Strategy, + point_tag, typename tag<Linear>::type, + strategy_tag_distance_point_segment, false + > +{}; + + +template <typename Point, typename Areal, typename Strategy> +struct distance + < + Point, Areal, Strategy, point_tag, areal_tag, + strategy_tag_distance_point_segment, false + > : distance + < + Point, Areal, Strategy, + point_tag, typename tag<Areal>::type, + strategy_tag_distance_point_segment, false + > +{}; + + +} // namespace dispatch +#endif // DOXYGEN_NO_DISPATCH + + +}} // namespace boost::geometry + + +#endif // BOOST_GEOMETRY_ALGORITHMS_DETAIL_DISTANCE_POINT_TO_GEOMETRY_HPP |