// Boost.Geometry
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// Copyright (c) 2019, 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_GEOGRAPHIC_POINT_ORDER_HPP
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#define BOOST_GEOMETRY_STRATEGIES_GEOGRAPHIC_POINT_ORDER_HPP
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#include <boost/geometry/core/tags.hpp>
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#include <boost/geometry/srs/spheroid.hpp>
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#include <boost/geometry/strategies/geographic/parameters.hpp>
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#include <boost/geometry/strategies/point_order.hpp>
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#include <boost/geometry/strategies/spherical/point_in_point.hpp>
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#include <boost/geometry/util/math.hpp>
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#include <boost/geometry/util/select_calculation_type.hpp>
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namespace boost { namespace geometry
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{
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namespace strategy { namespace point_order
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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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struct geographic
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{
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typedef azimuth_tag version_tag;
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template <typename Geometry>
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struct result_type
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{
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typedef typename geometry::select_calculation_type_alt
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<
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CalculationType, Geometry
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>::type type;
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};
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geographic()
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{}
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explicit geographic(Spheroid const& spheroid)
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: m_spheroid(spheroid)
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{}
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template <typename Point>
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inline bool apply(Point const& p1, Point const& p2,
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typename result_type<Point>::type & azi,
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typename result_type<Point>::type & razi) const
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{
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typedef typename result_type<Point>::type calc_t;
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if (equals_point_point(p1, p2))
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{
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return false;
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}
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formula::result_inverse<calc_t> res = FormulaPolicy::template inverse
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<
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calc_t, false, true, true, false, false
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>::apply(geometry::get_as_radian<0>(p1),
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geometry::get_as_radian<1>(p1),
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geometry::get_as_radian<0>(p2),
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geometry::get_as_radian<1>(p2),
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m_spheroid);
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azi = res.azimuth;
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razi = res.reverse_azimuth;
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return true;
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}
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template <typename Point>
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inline typename result_type<Point>::type
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apply(Point const& /*p0*/, Point const& /*p1*/, Point const& /*p2*/,
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typename result_type<Point>::type const& azi1,
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typename result_type<Point>::type const& azi2) const
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{
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// TODO: support poles
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return math::longitude_distance_signed<radian>(azi1, azi2);
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}
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private:
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template <typename Point>
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static bool equals_point_point(Point const& p0, Point const& p1)
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{
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return strategy::within::spherical_point_point::apply(p0, p1);
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}
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Spheroid m_spheroid;
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};
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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 geographic<> type;
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};
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} // namespace services
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}} // namespace strategy::point_order
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}} // namespace boost::geometry
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#endif // BOOST_GEOMETRY_STRATEGIES_GEOGRAPHIC_POINT_ORDER_HPP
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