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1 | // Boost.Geometry (aka GGL, Generic Geometry Library) |
2 | ||
3 | // Copyright (c) 2007-2012 Barend Gehrels, Amsterdam, the Netherlands. | |
4 | // Copyright (c) 2008-2012 Bruno Lalande, Paris, France. | |
5 | // Copyright (c) 2009-2012 Mateusz Loskot, London, UK. | |
6 | ||
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7 | // This file was modified by Oracle on 2014, 2018. |
8 | // Modifications copyright (c) 2014-2018 Oracle and/or its affiliates. | |
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9 | |
10 | // Contributed and/or modified by Adam Wulkiewicz, on behalf of Oracle | |
11 | ||
12 | // Parts of Boost.Geometry are redesigned from Geodan's Geographic Library | |
13 | // (geolib/GGL), copyright (c) 1995-2010 Geodan, Amsterdam, the Netherlands. | |
14 | ||
15 | // Use, modification and distribution is subject to the Boost Software License, | |
16 | // Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at | |
17 | // http://www.boost.org/LICENSE_1_0.txt) | |
18 | ||
19 | #ifndef BOOST_GEOMETRY_CORE_TAGS_HPP | |
20 | #define BOOST_GEOMETRY_CORE_TAGS_HPP | |
21 | ||
22 | ||
23 | namespace boost { namespace geometry | |
24 | { | |
25 | ||
26 | // Tags defining strategies linked to coordinate systems | |
27 | ||
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28 | /// Tag used for undefined coordinate system |
29 | struct cs_undefined_tag {}; | |
30 | ||
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31 | /// Tag used for casting spherical/geographic coordinate systems |
32 | struct spherical_tag {}; | |
33 | ||
34 | ||
35 | /// Tag indicating Cartesian coordinate system family (cartesian,epsg) | |
36 | struct cartesian_tag {}; | |
37 | ||
38 | /// Tag indicating Spherical polar coordinate system family | |
39 | struct spherical_polar_tag : spherical_tag {}; | |
40 | ||
41 | /// Tag indicating Spherical equatorial coordinate system family | |
42 | struct spherical_equatorial_tag : spherical_tag {}; | |
43 | ||
44 | /// Tag indicating Geographic coordinate system family (geographic) | |
45 | struct geographic_tag : spherical_tag {}; | |
46 | ||
47 | ||
48 | // Tags defining coordinate systems reference models | |
49 | ||
50 | /// For reference spheroid defining parameters of geographical coordinate system | |
51 | struct srs_spheroid_tag {}; | |
52 | ||
53 | /// For reference sphere defining parameters of spherical coordinate system | |
54 | struct srs_sphere_tag : srs_spheroid_tag {}; | |
55 | ||
56 | ||
57 | // Tags defining tag hierarchy | |
58 | ||
59 | /// For single-geometries (point, linestring, polygon, box, ring, segment) | |
60 | struct single_tag {}; | |
61 | ||
62 | ||
63 | /// For multiple-geometries (multi_point, multi_linestring, multi_polygon) | |
64 | struct multi_tag {}; | |
65 | ||
66 | /// For point-like types (point, multi_point) | |
67 | struct pointlike_tag {}; | |
68 | ||
69 | /// For linear types (linestring, multi-linestring, segment) | |
70 | struct linear_tag {}; | |
71 | ||
72 | /// For areal types (polygon, multi_polygon, box, ring) | |
73 | struct areal_tag {}; | |
74 | ||
75 | // Subset of areal types (polygon, multi_polygon, ring) | |
76 | struct polygonal_tag : areal_tag {}; | |
77 | ||
78 | /// For volume types (also box (?), polyhedron) | |
79 | struct volumetric_tag {}; | |
80 | ||
81 | ||
82 | // Tags defining geometry types | |
83 | ||
84 | ||
85 | /// "default" tag | |
86 | struct geometry_not_recognized_tag {}; | |
87 | ||
88 | /// OGC Point identifying tag | |
89 | struct point_tag : single_tag, pointlike_tag {}; | |
90 | ||
91 | /// OGC Linestring identifying tag | |
92 | struct linestring_tag : single_tag, linear_tag {}; | |
93 | ||
94 | /// OGC Polygon identifying tag | |
95 | struct polygon_tag : single_tag, polygonal_tag {}; | |
96 | ||
97 | /// Convenience (linear) ring identifying tag | |
98 | struct ring_tag : single_tag, polygonal_tag {}; | |
99 | ||
100 | /// Convenience 2D or 3D box (mbr / aabb) identifying tag | |
101 | struct box_tag : single_tag, areal_tag {}; | |
102 | ||
103 | /// Convenience segment (2-points) identifying tag | |
104 | struct segment_tag : single_tag, linear_tag {}; | |
105 | ||
106 | ||
107 | /// OGC Multi point identifying tag | |
108 | struct multi_point_tag : multi_tag, pointlike_tag {}; | |
109 | ||
110 | /// OGC Multi linestring identifying tag | |
111 | struct multi_linestring_tag : multi_tag, linear_tag {}; | |
112 | ||
113 | /// OGC Multi polygon identifying tag | |
114 | struct multi_polygon_tag : multi_tag, polygonal_tag {}; | |
115 | ||
116 | /// OGC Geometry Collection identifying tag | |
117 | struct geometry_collection_tag : multi_tag {}; | |
118 | ||
119 | ||
120 | /*! | |
121 | \brief Meta-function to get for a tag of a multi-geometry | |
122 | the tag of the corresponding single-geometry | |
123 | */ | |
124 | template <typename Tag> | |
125 | struct single_tag_of | |
126 | {}; | |
127 | ||
128 | #ifndef DOXYGEN_NO_DETAIL | |
129 | ||
130 | template <> | |
131 | struct single_tag_of<multi_point_tag> | |
132 | { | |
133 | typedef point_tag type; | |
134 | }; | |
135 | ||
136 | template <> | |
137 | struct single_tag_of<multi_linestring_tag> | |
138 | { | |
139 | typedef linestring_tag type; | |
140 | }; | |
141 | ||
142 | template <> | |
143 | struct single_tag_of<multi_polygon_tag> | |
144 | { | |
145 | typedef polygon_tag type; | |
146 | }; | |
147 | ||
148 | #endif | |
149 | ||
150 | ||
151 | }} // namespace boost::geometry | |
152 | ||
153 | #endif // BOOST_GEOMETRY_CORE_TAGS_HPP |