112 lines
2.8 KiB
C++
112 lines
2.8 KiB
C++
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// Boost.Geometry
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// Copyright (c) 2020-2021, Oracle and/or its affiliates.
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// Contributed and/or modified by Adam Wulkiewicz, on behalf of Oracle
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// Licensed under the Boost Software License version 1.0.
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// http://www.boost.org/users/license.html
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#ifndef BOOST_GEOMETRY_STRATEGIES_AREA_GEOGRAPHIC_HPP
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#define BOOST_GEOMETRY_STRATEGIES_AREA_GEOGRAPHIC_HPP
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#include <boost/geometry/strategy/geographic/area.hpp>
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#include <boost/geometry/strategy/geographic/area_box.hpp>
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#include <boost/geometry/strategies/area/services.hpp>
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#include <boost/geometry/strategies/detail.hpp>
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namespace boost { namespace geometry
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{
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namespace strategies { namespace area
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{
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template
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<
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typename FormulaPolicy = strategy::andoyer,
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typename Spheroid = srs::spheroid<double>,
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typename CalculationType = void
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>
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class geographic
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: public strategies::detail::geographic_base<Spheroid>
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{
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using base_t = strategies::detail::geographic_base<Spheroid>;
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public:
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geographic() = default;
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explicit geographic(Spheroid const& spheroid)
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: base_t(spheroid)
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{}
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template <typename Geometry>
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auto area(Geometry const&,
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std::enable_if_t<! util::is_box<Geometry>::value> * = nullptr) const
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{
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return strategy::area::geographic
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<
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FormulaPolicy,
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strategy::default_order<FormulaPolicy>::value,
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Spheroid, CalculationType
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>(base_t::m_spheroid);
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}
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template <typename Geometry>
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auto area(Geometry const&,
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std::enable_if_t<util::is_box<Geometry>::value> * = nullptr) const
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{
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return strategy::area::geographic_box
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<
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Spheroid, CalculationType
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>(base_t::m_spheroid);
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}
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};
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namespace services
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{
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template <typename Geometry>
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struct default_strategy<Geometry, geographic_tag>
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{
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using type = strategies::area::geographic<>;
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};
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template <typename FP, std::size_t SO, typename S, typename CT>
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struct strategy_converter<strategy::area::geographic<FP, SO, S, CT> >
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{
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struct altered_strategy
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: strategies::area::geographic<FP, S, CT>
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{
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explicit altered_strategy(S const& spheroid)
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: strategies::area::geographic<FP, S, CT>(spheroid)
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{}
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using strategies::area::geographic<FP, S, CT>::area;
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template <typename Geometry>
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auto area(Geometry const&,
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std::enable_if_t<! util::is_box<Geometry>::value> * = nullptr) const
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{
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return strategy::area::geographic<FP, SO, S, CT>(this->m_spheroid);
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}
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};
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static auto get(strategy::area::geographic<FP, SO, S, CT> const& strategy)
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{
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return altered_strategy(strategy.model());
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}
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};
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} // namespace services
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}} // namespace strategies::area
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}} // namespace boost::geometry
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#endif // BOOST_GEOMETRY_STRATEGIES_AREA_GEOGRAPHIC_HPP
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