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1 | // Boost.Geometry (aka GGL, Generic Geometry Library) |
2 | ||
3 | // Copyright (c) 2014, Oracle and/or its affiliates. | |
4 | ||
5 | // Contributed and/or modified by Menelaos Karavelas, 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_DISTANCE_LINEAR_OR_AREAL_TO_AREAL_HPP | |
11 | #define BOOST_GEOMETRY_ALGORITHMS_DETAIL_DISTANCE_LINEAR_OR_AREAL_TO_AREAL_HPP | |
12 | ||
13 | #include <boost/geometry/core/point_type.hpp> | |
14 | ||
15 | #include <boost/geometry/strategies/distance.hpp> | |
16 | ||
17 | #include <boost/geometry/algorithms/intersects.hpp> | |
18 | ||
19 | #include <boost/geometry/algorithms/detail/distance/linear_to_linear.hpp> | |
20 | ||
21 | ||
22 | namespace boost { namespace geometry | |
23 | { | |
24 | ||
25 | #ifndef DOXYGEN_NO_DETAIL | |
26 | namespace detail { namespace distance | |
27 | { | |
28 | ||
29 | ||
30 | template <typename Linear, typename Areal, typename Strategy> | |
31 | struct linear_to_areal | |
32 | { | |
33 | typedef typename strategy::distance::services::return_type | |
34 | < | |
35 | Strategy, | |
36 | typename point_type<Linear>::type, | |
37 | typename point_type<Areal>::type | |
38 | >::type return_type; | |
39 | ||
40 | static inline return_type apply(Linear const& linear, | |
41 | Areal const& areal, | |
42 | Strategy const& strategy) | |
43 | { | |
44 | if ( geometry::intersects(linear, areal) ) | |
45 | { | |
46 | return 0; | |
47 | } | |
48 | ||
49 | return linear_to_linear | |
50 | < | |
51 | Linear, Areal, Strategy | |
52 | >::apply(linear, areal, strategy, false); | |
53 | } | |
54 | ||
55 | ||
56 | static inline return_type apply(Areal const& areal, | |
57 | Linear const& linear, | |
58 | Strategy const& strategy) | |
59 | { | |
60 | return apply(linear, areal, strategy); | |
61 | } | |
62 | }; | |
63 | ||
64 | ||
65 | template <typename Areal1, typename Areal2, typename Strategy> | |
66 | struct areal_to_areal | |
67 | { | |
68 | typedef typename strategy::distance::services::return_type | |
69 | < | |
70 | Strategy, | |
71 | typename point_type<Areal1>::type, | |
72 | typename point_type<Areal2>::type | |
73 | >::type return_type; | |
74 | ||
75 | static inline return_type apply(Areal1 const& areal1, | |
76 | Areal2 const& areal2, | |
77 | Strategy const& strategy) | |
78 | { | |
79 | if ( geometry::intersects(areal1, areal2) ) | |
80 | { | |
81 | return 0; | |
82 | } | |
83 | ||
84 | return linear_to_linear | |
85 | < | |
86 | Areal1, Areal2, Strategy | |
87 | >::apply(areal1, areal2, strategy, false); | |
88 | } | |
89 | }; | |
90 | ||
91 | ||
92 | }} // namespace detail::distance | |
93 | #endif // DOXYGEN_NO_DETAIL | |
94 | ||
95 | ||
96 | #ifndef DOXYGEN_NO_DISPATCH | |
97 | namespace dispatch | |
98 | { | |
99 | ||
100 | template <typename Linear, typename Areal, typename Strategy> | |
101 | struct distance | |
102 | < | |
103 | Linear, Areal, Strategy, | |
104 | linear_tag, areal_tag, | |
105 | strategy_tag_distance_point_segment, false | |
106 | > | |
107 | : detail::distance::linear_to_areal | |
108 | < | |
109 | Linear, Areal, Strategy | |
110 | > | |
111 | {}; | |
112 | ||
113 | ||
114 | template <typename Areal, typename Linear, typename Strategy> | |
115 | struct distance | |
116 | < | |
117 | Areal, Linear, Strategy, | |
118 | areal_tag, linear_tag, | |
119 | strategy_tag_distance_point_segment, false | |
120 | > | |
121 | : detail::distance::linear_to_areal | |
122 | < | |
123 | Linear, Areal, Strategy | |
124 | > | |
125 | {}; | |
126 | ||
127 | ||
128 | template <typename Areal1, typename Areal2, typename Strategy> | |
129 | struct distance | |
130 | < | |
131 | Areal1, Areal2, Strategy, | |
132 | areal_tag, areal_tag, | |
133 | strategy_tag_distance_point_segment, false | |
134 | > | |
135 | : detail::distance::areal_to_areal | |
136 | < | |
137 | Areal1, Areal2, Strategy | |
138 | > | |
139 | {}; | |
140 | ||
141 | ||
142 | } // namespace dispatch | |
143 | #endif // DOXYGEN_NO_DISPATCH | |
144 | ||
145 | }} // namespace boost::geometry | |
146 | ||
147 | #endif // BOOST_GEOMETRY_ALGORITHMS_DETAIL_DISTANCE_LINEAR_OR_AREAL_TO_AREAL_HPP |