strategies/expand/geographic.hpp

0001 // Boost.Geometry
0002
0003 // Copyright (c) 2020-2021, Oracle and/or its affiliates.
0004
0005 // Contributed and/or modified by Adam Wulkiewicz, on behalf of Oracle
0006
0007 // Licensed under the Boost Software License version 1.0.
0008 // http://www.boost.org/users/license.html
0009
0010 #ifndef BOOST_GEOMETRY_STRATEGIES_EXPAND_GEOGRAPHIC_HPP
0011 #define BOOST_GEOMETRY_STRATEGIES_EXPAND_GEOGRAPHIC_HPP
0012
0013
0014 #include <type_traits>
0015
0016 #include <boost/geometry/strategy/geographic/expand_segment.hpp>
0017
0018 #include <boost/geometry/strategies/detail.hpp>
0019 #include <boost/geometry/strategies/expand/spherical.hpp>
0020
0021
0022 namespace boost { namespace geometry
0023 {
0024
0025 namespace strategies { namespace expand
0026 {
0027
0028 template
0029 <
0030     typename FormulaPolicy = strategy::andoyer,
0031     typename Spheroid = srs::spheroid<double>,
0032     typename CalculationType = void
0033 >
0034 class geographic
0035     : public strategies::detail::geographic_base<Spheroid>
0036 {
0037     using base_t = strategies::detail::geographic_base<Spheroid>;
0038
0039 public:
0040     geographic() = default;
0041
0042     explicit geographic(Spheroid const& spheroid)
0043         : base_t(spheroid)
0044     {}
0045
0046     template <typename Box, typename Geometry>
0047     static auto expand(Box const&, Geometry const&,
0048                        typename util::enable_if_point_t<Geometry> * = nullptr)
0049     {
0050         return strategy::expand::spherical_point();
0051     }
0052
0053     template <typename Box, typename Geometry>
0054     static auto expand(Box const&, Geometry const&,
0055                        typename util::enable_if_box_t<Geometry> * = nullptr)
0056     {
0057         return strategy::expand::spherical_box();
0058     }
0059
0060     template <typename Box, typename Geometry>
0061     auto expand(Box const&, Geometry const&,
0062                 typename util::enable_if_segment_t<Geometry> * = nullptr) const
0063     {
0064         return strategy::expand::geographic_segment
0065             <
0066                 FormulaPolicy, Spheroid, CalculationType
0067             >(base_t::m_spheroid);
0068     }
0069 };
0070
0071
0072 namespace services
0073 {
0074
0075 template <typename Box, typename Geometry>
0076 struct default_strategy<Box, Geometry, geographic_tag>
0077 {
0078     using type = strategies::expand::geographic<>;
0079 };
0080
0081
0082 template <typename FP, typename S, typename CT>
0083 struct strategy_converter<strategy::expand::geographic_segment<FP, S, CT> >
0084 {
0085     static auto get(strategy::expand::geographic_segment<FP, S, CT> const& s)
0086     {
0087         return strategies::expand::geographic<FP, S, CT>(s.model());
0088     }
0089 };
0090
0091
0092 } // namespace services
0093
0094 }} // namespace strategies::envelope
0095
0096 }} // namespace boost::geometry
0097
0098 #endif // BOOST_GEOMETRY_STRATEGIES_EXPAND_GEOGRAPHIC_HPP