156 lines
4.2 KiB
C++
156 lines
4.2 KiB
C++
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// Boost.Geometry (aka GGL, Generic Geometry Library)
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// Copyright (c) 2016-2021 Oracle and/or its affiliates.
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// Contributed and/or modified by Vissarion Fisikopoulos, on behalf of Oracle
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// Contributed and/or modified by Adam Wulkiewicz, on behalf of Oracle
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// Use, modification and distribution is subject to the Boost Software License,
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// Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at
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// http://www.boost.org/LICENSE_1_0.txt)
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#ifndef BOOST_GEOMETRY_STRATEGIES_GEOGRAPHIC_AZIMUTH_HPP
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#define BOOST_GEOMETRY_STRATEGIES_GEOGRAPHIC_AZIMUTH_HPP
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#include <type_traits>
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#include <boost/geometry/srs/spheroid.hpp>
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#include <boost/geometry/strategies/azimuth.hpp>
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#include <boost/geometry/strategies/geographic/parameters.hpp>
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#include <boost/geometry/util/select_most_precise.hpp>
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namespace boost { namespace geometry
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{
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namespace strategy { namespace azimuth
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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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{
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public:
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template <typename T1, typename T2>
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struct result_type
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: geometry::select_most_precise
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<
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T1, T2, CalculationType
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>
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{};
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typedef Spheroid model_type;
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inline geographic()
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: m_spheroid()
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{}
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explicit inline geographic(Spheroid const& spheroid)
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: m_spheroid(spheroid)
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{}
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inline model_type const& model() const
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{
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return m_spheroid;
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}
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template <typename T1, typename T2, typename Result>
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inline void apply(T1 const& lon1_rad, T1 const& lat1_rad,
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T2 const& lon2_rad, T2 const& lat2_rad,
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Result& a1, Result& a2) const
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{
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compute<true, true>(lon1_rad, lat1_rad,
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lon2_rad, lat2_rad,
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a1, a2);
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}
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template <typename T1, typename T2, typename Result>
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inline void apply(T1 const& lon1_rad, T1 const& lat1_rad,
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T2 const& lon2_rad, T2 const& lat2_rad,
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Result& a1) const
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{
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compute<true, false>(lon1_rad, lat1_rad,
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lon2_rad, lat2_rad,
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a1, a1);
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}
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template <typename T1, typename T2, typename Result>
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inline void apply_reverse(T1 const& lon1_rad, T1 const& lat1_rad,
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T2 const& lon2_rad, T2 const& lat2_rad,
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Result& a2) const
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{
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compute<false, true>(lon1_rad, lat1_rad,
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lon2_rad, lat2_rad,
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a2, a2);
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}
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private :
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template
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<
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bool EnableAzimuth,
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bool EnableReverseAzimuth,
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typename T1, typename T2, typename Result
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>
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inline void compute(T1 const& lon1_rad, T1 const& lat1_rad,
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T2 const& lon2_rad, T2 const& lat2_rad,
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Result& a1, Result& a2) const
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{
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typedef typename result_type<T1, T2>::type calc_t;
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typedef typename FormulaPolicy::template inverse
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<
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calc_t,
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false,
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EnableAzimuth,
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EnableReverseAzimuth,
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false,
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false
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> inverse_type;
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typedef typename inverse_type::result_type inverse_result;
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inverse_result i_res = inverse_type::apply(calc_t(lon1_rad), calc_t(lat1_rad),
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calc_t(lon2_rad), calc_t(lat2_rad),
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m_spheroid);
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if (EnableAzimuth)
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{
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a1 = i_res.azimuth;
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}
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if (EnableReverseAzimuth)
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{
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a2 = i_res.reverse_azimuth;
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}
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}
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Spheroid m_spheroid;
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};
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#ifndef DOXYGEN_NO_STRATEGY_SPECIALIZATIONS
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namespace services
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{
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template <>
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struct default_strategy<geographic_tag>
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{
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typedef strategy::azimuth::geographic
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<
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strategy::andoyer,
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srs::spheroid<double>
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> type;
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};
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}
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#endif // DOXYGEN_NO_STRATEGY_SPECIALIZATIONS
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}} // namespace strategy::azimuth
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}} // namespace boost::geometry
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#endif // BOOST_GEOMETRY_STRATEGIES_GEOGRAPHIC_AZIMUTH_HPP
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