123 lines
3.5 KiB
C++
123 lines
3.5 KiB
C++
// 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_SPHERICAL_AZIMUTH_HPP
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#define BOOST_GEOMETRY_STRATEGIES_SPHERICAL_AZIMUTH_HPP
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#include <type_traits>
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#include <boost/geometry/formulas/spherical.hpp>
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#include <boost/geometry/strategies/azimuth.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 <typename CalculationType = void>
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class spherical
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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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template <typename T1, typename T2, typename Result>
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static 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)
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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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static 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)
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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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static 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)
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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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static 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)
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{
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typedef typename result_type<T1, T2>::type calc_t;
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geometry::formula::result_spherical<calc_t>
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result = geometry::formula::spherical_azimuth
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<
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calc_t,
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EnableReverseAzimuth
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>(calc_t(lon1_rad), calc_t(lat1_rad),
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calc_t(lon2_rad), calc_t(lat2_rad));
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if (EnableAzimuth)
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{
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a1 = result.azimuth;
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}
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if (EnableReverseAzimuth)
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{
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a2 = result.reverse_azimuth;
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}
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}
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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<spherical_equatorial_tag>
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{
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typedef strategy::azimuth::spherical<> 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_SPHERICAL_AZIMUTH_HPP
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