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