strategies/simplify/geographic.hpp

0001 // Boost.Geometry
0002
0003 // Copyright (c) 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_SIMPLIFY_GEOGRAPHIC_HPP
0011 #define BOOST_GEOMETRY_STRATEGIES_SIMPLIFY_GEOGRAPHIC_HPP
0012
0013
0014 #include <boost/geometry/strategies/detail.hpp>
0015 #include <boost/geometry/strategies/distance/detail.hpp>
0016 #include <boost/geometry/strategies/simplify/services.hpp>
0017
0018 #include <boost/geometry/strategies/agnostic/simplify_douglas_peucker.hpp>
0019 #include <boost/geometry/strategies/geographic/distance_cross_track.hpp>
0020 #include <boost/geometry/strategies/spherical/point_in_point.hpp>
0021
0022 #include <boost/geometry/strategy/geographic/area.hpp>
0023
0024
0025 namespace boost { namespace geometry
0026 {
0027
0028 namespace strategies { namespace simplify
0029 {
0030
0031 template
0032 <
0033     typename FormulaPolicy = strategy::andoyer,
0034     typename Spheroid = srs::spheroid<double>,
0035     typename CalculationType = void
0036 >
0037 class geographic
0038     : public strategies::detail::geographic_base<Spheroid>
0039 {
0040     using base_t = strategies::detail::geographic_base<Spheroid>;
0041
0042 public:
0043     geographic() = default;
0044
0045     explicit geographic(Spheroid const& spheroid)
0046         : base_t(spheroid)
0047     {}
0048
0049     // TODO: Replace this if calculate_point_order() is used in simplify
0050     template <typename Geometry>
0051     auto area(Geometry const&) const
0052     {
0053         return strategy::area::geographic
0054             <
0055                 FormulaPolicy,
0056                 strategy::default_order<FormulaPolicy>::value,
0057                 Spheroid,
0058                 CalculationType
0059             >(base_t::m_spheroid);
0060     }
0061
0062     // For perimeter()
0063     template <typename Geometry1, typename Geometry2>
0064     auto distance(Geometry1 const&, Geometry2 const&,
0065                   distance::detail::enable_if_pp_t<Geometry1, Geometry2> * = nullptr) const
0066     {
0067         return strategy::distance::geographic
0068                 <
0069                     FormulaPolicy, Spheroid, CalculationType
0070                 >(base_t::m_spheroid);
0071     }
0072
0073     // For douglas_peucker
0074     template <typename Geometry1, typename Geometry2>
0075     auto distance(Geometry1 const&, Geometry2 const&,
0076                   distance::detail::enable_if_ps_t<Geometry1, Geometry2> * = nullptr) const
0077     {
0078         return strategy::distance::geographic_cross_track
0079             <
0080                 FormulaPolicy, Spheroid, CalculationType
0081             >(base_t::m_spheroid);
0082     }
0083
0084     // For equals()
0085     template <typename Geometry1, typename Geometry2>
0086     static auto relate(Geometry1 const&, Geometry2 const&,
0087                        std::enable_if_t
0088                             <
0089                                 util::is_pointlike<Geometry1>::value
0090                              && util::is_pointlike<Geometry2>::value
0091                             > * = nullptr)
0092     {
0093         return strategy::within::spherical_point_point();
0094     }
0095 };
0096
0097
0098 namespace services
0099 {
0100
0101 template <typename Geometry>
0102 struct default_strategy<Geometry, geographic_tag>
0103 {
0104     using type = strategies::simplify::geographic<>;
0105 };
0106
0107
0108 template <typename P, typename FP, typename S, typename CT>
0109 struct strategy_converter
0110     <
0111         strategy::simplify::douglas_peucker
0112             <
0113                 P,
0114                 strategy::distance::geographic_cross_track<FP, S, CT>
0115             >
0116     >
0117 {
0118     template <typename Strategy>
0119     static auto get(Strategy const& )
0120     {
0121         return strategies::simplify::geographic<FP, S, CT>();
0122     }
0123 };
0124
0125
0126 } // namespace services
0127
0128 }} // namespace strategies::simplify
0129
0130 }} // namespace boost::geometry
0131
0132 #endif // BOOST_GEOMETRY_STRATEGIES_SIMPLIFY_GEOGRAPHIC_HPP