1 | // Boost.Geometry (aka GGL, Generic Geometry Library) |
2 | |
3 | // Copyright (c) 2008-2012 Bruno Lalande, Paris, France. |
4 | // Copyright (c) 2008-2012 Barend Gehrels, Amsterdam, the Netherlands. |
5 | // Copyright (c) 2009-2012 Mateusz Loskot, London, UK. |
6 | |
7 | // Parts of Boost.Geometry are redesigned from Geodan's Geographic Library |
8 | // (geolib/GGL), copyright (c) 1995-2010 Geodan, Amsterdam, the Netherlands. |
9 | |
10 | // Use, modification and distribution is subject to the Boost Software License, |
11 | // Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at |
12 | // http://www.boost.org/LICENSE_1_0.txt) |
13 | |
14 | #ifndef BOOST_GEOMETRY_CORE_COORDINATE_SYSTEM_HPP |
15 | #define BOOST_GEOMETRY_CORE_COORDINATE_SYSTEM_HPP |
16 | |
17 | |
18 | #include <boost/mpl/assert.hpp> |
19 | |
20 | #include <boost/geometry/core/point_type.hpp> |
21 | #include <boost/geometry/util/bare_type.hpp> |
22 | |
23 | |
24 | namespace boost { namespace geometry |
25 | { |
26 | |
27 | |
28 | namespace traits |
29 | { |
30 | |
31 | /*! |
32 | \brief Traits class defining the coordinate system of a point, important for strategy selection |
33 | \ingroup traits |
34 | \par Geometries: |
35 | - point |
36 | \par Specializations should provide: |
37 | - typedef CS type; (cs::cartesian, cs::spherical, etc) |
38 | */ |
39 | template <typename Point, typename Enable = void> |
40 | struct coordinate_system |
41 | { |
42 | BOOST_MPL_ASSERT_MSG |
43 | ( |
44 | false, NOT_IMPLEMENTED_FOR_THIS_POINT_TYPE, (types<Point>) |
45 | ); |
46 | }; |
47 | |
48 | } // namespace traits |
49 | |
50 | |
51 | |
52 | #ifndef DOXYGEN_NO_DISPATCH |
53 | namespace core_dispatch |
54 | { |
55 | template <typename GeometryTag, typename G> |
56 | struct coordinate_system |
57 | { |
58 | typedef typename point_type<GeometryTag, G>::type P; |
59 | |
60 | // Call its own specialization on point-tag |
61 | typedef typename coordinate_system<point_tag, P>::type type; |
62 | }; |
63 | |
64 | |
65 | template <typename Point> |
66 | struct coordinate_system<point_tag, Point> |
67 | { |
68 | typedef typename traits::coordinate_system |
69 | < |
70 | typename geometry::util::bare_type<Point>::type |
71 | >::type type; |
72 | }; |
73 | |
74 | |
75 | } // namespace core_dispatch |
76 | #endif |
77 | |
78 | |
79 | /*! |
80 | \brief \brief_meta{type, coordinate system (cartesian\, spherical\, etc), \meta_point_type} |
81 | \tparam Geometry \tparam_geometry |
82 | \ingroup core |
83 | |
84 | \qbk{[include reference/core/coordinate_system.qbk]} |
85 | */ |
86 | template <typename Geometry> |
87 | struct coordinate_system |
88 | { |
89 | typedef typename core_dispatch::coordinate_system |
90 | < |
91 | typename tag<Geometry>::type, |
92 | typename geometry::util::bare_type<Geometry>::type |
93 | >::type type; |
94 | }; |
95 | |
96 | |
97 | }} // namespace boost::geometry |
98 | |
99 | |
100 | #endif // BOOST_GEOMETRY_CORE_COORDINATE_SYSTEM_HPP |
101 | |