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- // Boost.Geometry (aka GGL, Generic Geometry Library)
- // Copyright (c) 2014, Oracle and/or its affiliates.
- // Contributed and/or modified by Menelaos Karavelas, on behalf of Oracle
- // Licensed under the Boost Software License version 1.0.
- // http://www.boost.org/users/license.html
- #ifndef BOOST_GEOMETRY_ALGORITHMS_DETAIL_DISTANCE_RANGE_TO_GEOMETRY_RTREE_HPP
- #define BOOST_GEOMETRY_ALGORITHMS_DETAIL_DISTANCE_RANGE_TO_GEOMETRY_RTREE_HPP
- #include <iterator>
- #include <utility>
- #include <boost/geometry/core/assert.hpp>
- #include <boost/geometry/core/point_type.hpp>
- #include <boost/geometry/iterators/has_one_element.hpp>
- #include <boost/geometry/strategies/distance.hpp>
- #include <boost/geometry/algorithms/dispatch/distance.hpp>
- #include <boost/geometry/algorithms/detail/closest_feature/range_to_range.hpp>
- #include <boost/geometry/algorithms/detail/distance/is_comparable.hpp>
- #include <boost/geometry/algorithms/detail/distance/iterator_selector.hpp>
- namespace boost { namespace geometry
- {
- #ifndef DOXYGEN_NO_DETAIL
- namespace detail { namespace distance
- {
- template
- <
- typename PointOrSegmentIterator,
- typename Geometry,
- typename Strategy
- >
- class point_or_segment_range_to_geometry_rtree
- {
- private:
- typedef typename std::iterator_traits
- <
- PointOrSegmentIterator
- >::value_type point_or_segment_type;
- typedef iterator_selector<Geometry const> selector_type;
- typedef detail::closest_feature::range_to_range_rtree range_to_range;
- public:
- typedef typename strategy::distance::services::return_type
- <
- Strategy,
- typename point_type<point_or_segment_type>::type,
- typename point_type<Geometry>::type
- >::type return_type;
- static inline return_type apply(PointOrSegmentIterator first,
- PointOrSegmentIterator last,
- Geometry const& geometry,
- Strategy const& strategy)
- {
- namespace sds = strategy::distance::services;
- BOOST_GEOMETRY_ASSERT( first != last );
- if ( geometry::has_one_element(first, last) )
- {
- return dispatch::distance
- <
- point_or_segment_type, Geometry, Strategy
- >::apply(*first, geometry, strategy);
- }
- typename sds::return_type
- <
- typename sds::comparable_type<Strategy>::type,
- typename point_type<point_or_segment_type>::type,
- typename point_type<Geometry>::type
- >::type cd_min;
- std::pair
- <
- point_or_segment_type,
- typename selector_type::iterator_type
- > closest_features
- = range_to_range::apply(first,
- last,
- selector_type::begin(geometry),
- selector_type::end(geometry),
- sds::get_comparable
- <
- Strategy
- >::apply(strategy),
- cd_min);
- return
- is_comparable<Strategy>::value
- ?
- cd_min
- :
- dispatch::distance
- <
- point_or_segment_type,
- typename std::iterator_traits
- <
- typename selector_type::iterator_type
- >::value_type,
- Strategy
- >::apply(closest_features.first,
- *closest_features.second,
- strategy);
- }
- };
- }} // namespace detail::distance
- #endif // DOXYGEN_NO_DETAIL
- }} // namespace boost::geometry
- #endif // BOOST_GEOMETRY_ALGORITHMS_DETAIL_DISTANCE_RANGE_TO_GEOMETRY_RTREE_HPP
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