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1 | // Boost.Geometry |
2 | ||
3 | // Copyright (c) 2021, Oracle and/or its affiliates. | |
4 | ||
5 | // Contributed and/or modified by Vissarion Fysikopoulos, on behalf of Oracle | |
6 | ||
7 | // Licensed under the Boost Software License version 1.0. | |
8 | // http://www.boost.org/users/license.html | |
9 | ||
10 | #ifndef BOOST_GEOMETRY_ALGORITHMS_DETAIL_CLOSEST_POINTS_UTILITIES_HPP | |
11 | #define BOOST_GEOMETRY_ALGORITHMS_DETAIL_CLOSEST_POINTS_UTILITIES_HPP | |
12 | ||
13 | #include <boost/geometry/strategies/distance.hpp> | |
14 | ||
15 | namespace boost { namespace geometry | |
16 | { | |
17 | ||
18 | namespace detail { namespace closest_points | |
19 | { | |
20 | ||
21 | struct set_segment_from_points | |
22 | { | |
23 | template <typename Point1, typename Point2, typename Segment> | |
24 | static inline void apply(Point1 const& p1, Point2 const& p2, Segment& segment) | |
25 | { | |
26 | assign_point_to_index<0>(p1, segment); | |
27 | assign_point_to_index<1>(p2, segment); | |
28 | } | |
29 | }; | |
30 | ||
31 | ||
32 | struct swap_segment_points | |
33 | { | |
34 | template <typename Segment> | |
35 | static inline void apply(Segment& segment) | |
36 | { | |
37 | geometry::detail::for_each_dimension<Segment>([&](auto index) | |
38 | { | |
39 | auto temp = get<0,index>(segment); | |
40 | set<0,index>(segment, get<1,index>(segment)); | |
41 | set<1,index>(segment, temp); | |
42 | }); | |
43 | } | |
44 | }; | |
45 | ||
46 | template <typename Geometry1, typename Geometry2, typename Strategies> | |
47 | using distance_strategy_t = decltype( | |
48 | std::declval<Strategies>().distance(std::declval<Geometry1>(), std::declval<Geometry2>())); | |
49 | ||
50 | template <typename Geometry1, typename Geometry2, typename Strategies> | |
51 | using creturn_t = typename strategy::distance::services::return_type | |
52 | < | |
53 | typename strategy::distance::services::comparable_type | |
54 | < | |
55 | distance_strategy_t<Geometry1, Geometry2, Strategies> | |
56 | >::type, | |
57 | typename point_type<Geometry1>::type, | |
58 | typename point_type<Geometry2>::type | |
59 | >::type; | |
60 | ||
61 | ||
62 | }} // namespace detail::closest_points | |
63 | ||
64 | }} // namespace boost::geometry | |
65 | ||
66 | #endif //BOOST_GEOMETRY_ALGORITHMS_DETAIL_CLOSEST_POINTS_UTILITIES_HPP |