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| Commit | Line | Data |
|---|---|---|
| 7c673cae FG |
1 | // Boost.Geometry Index |
| 2 | // | |
| 3 | // Get smallest value calculated for indexable's dimensions, used in R-tree k nearest neighbors query | |
| 4 | // | |
| 5 | // Copyright (c) 2011-2013 Adam Wulkiewicz, Lodz, Poland. | |
| 6 | // | |
| 7 | // Use, modification and distribution is subject to the Boost Software License, | |
| 8 | // Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at | |
| 9 | // http://www.boost.org/LICENSE_1_0.txt) | |
| 10 | ||
| 11 | #ifndef BOOST_GEOMETRY_INDEX_DETAIL_ALGORITHMS_SMALLEST_FOR_INDEXABLE_HPP | |
| 12 | #define BOOST_GEOMETRY_INDEX_DETAIL_ALGORITHMS_SMALLEST_FOR_INDEXABLE_HPP | |
| 13 | ||
| 14 | namespace boost { namespace geometry { namespace index { namespace detail { | |
| 15 | ||
| 16 | template < | |
| 17 | typename Geometry, | |
| 18 | typename Indexable, | |
| 19 | typename IndexableTag, | |
| 20 | typename AlgoTag, | |
| 21 | size_t DimensionIndex> | |
| 22 | struct smallest_for_indexable_dimension | |
| 23 | { | |
| 24 | BOOST_MPL_ASSERT_MSG( | |
| 25 | (false), | |
| 26 | NOT_IMPLEMENTED_FOR_THIS_INDEXABLE_TAG_TYPE, | |
| 27 | (smallest_for_indexable_dimension)); | |
| 28 | }; | |
| 29 | ||
| 30 | template < | |
| 31 | typename Geometry, | |
| 32 | typename Indexable, | |
| 33 | typename IndexableTag, | |
| 34 | typename AlgoTag, | |
| 35 | size_t N> | |
| 36 | struct smallest_for_indexable | |
| 37 | { | |
| 38 | typedef typename smallest_for_indexable_dimension< | |
| 39 | Geometry, Indexable, IndexableTag, AlgoTag, N - 1 | |
| 40 | >::result_type result_type; | |
| 41 | ||
| 42 | template <typename Data> | |
| 43 | inline static result_type apply(Geometry const& g, Indexable const& i, Data const& data) | |
| 44 | { | |
| 45 | result_type r1 = smallest_for_indexable< | |
| 46 | Geometry, Indexable, IndexableTag, AlgoTag, N - 1 | |
| 47 | >::apply(g, i, data); | |
| 48 | ||
| 49 | result_type r2 = smallest_for_indexable_dimension< | |
| 50 | Geometry, Indexable, IndexableTag, AlgoTag, N - 1 | |
| 51 | >::apply(g, i, data); | |
| 52 | ||
| 53 | return r1 < r2 ? r1 : r2; | |
| 54 | } | |
| 55 | }; | |
| 56 | ||
| 57 | template < | |
| 58 | typename Geometry, | |
| 59 | typename Indexable, | |
| 60 | typename IndexableTag, | |
| 61 | typename AlgoTag> | |
| 62 | struct smallest_for_indexable<Geometry, Indexable, IndexableTag, AlgoTag, 1> | |
| 63 | { | |
| 64 | typedef typename smallest_for_indexable_dimension< | |
| 65 | Geometry, Indexable, IndexableTag, AlgoTag, 0 | |
| 66 | >::result_type result_type; | |
| 67 | ||
| 68 | template <typename Data> | |
| 69 | inline static result_type apply(Geometry const& g, Indexable const& i, Data const& data) | |
| 70 | { | |
| 71 | return | |
| 72 | smallest_for_indexable_dimension< | |
| 73 | Geometry, Indexable, IndexableTag, AlgoTag, 0 | |
| 74 | >::apply(g, i, data); | |
| 75 | } | |
| 76 | }; | |
| 77 | ||
| 78 | }}}} // namespace boost::geometry::index::detail | |
| 79 | ||
| 80 | #endif // BOOST_GEOMETRY_INDEX_DETAIL_ALGORITHMS_SMALLEST_FOR_INDEXABLE_HPP |