122 lines
3.4 KiB
C++
122 lines
3.4 KiB
C++
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// Boost.Geometry
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// Copyright (c) 2018-2021, Oracle and/or its affiliates.
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// Contributed and/or modified by Vissarion Fysikopoulos, on behalf of Oracle
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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_LINE_INTERPOLATE_HPP
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#define BOOST_GEOMETRY_STRATEGIES_GEOGRAPHIC_LINE_INTERPOLATE_HPP
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#include <boost/geometry/core/assert.hpp>
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#include <boost/geometry/core/coordinate_dimension.hpp>
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#include <boost/geometry/core/coordinate_type.hpp>
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#include <boost/geometry/core/radian_access.hpp>
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#include <boost/geometry/srs/spheroid.hpp>
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#include <boost/geometry/strategies/line_interpolate.hpp>
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#include <boost/geometry/strategies/geographic/parameters.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 line_interpolate
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{
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/*!
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\brief Interpolate point on a geographic segment.
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\ingroup strategies
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\tparam FormulaPolicy The geodesic formulas used internally.
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\tparam Spheroid The spheroid model.
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\tparam CalculationType \tparam_calculation
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\qbk{
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[heading See also]
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\* [link geometry.reference.algorithms.line_interpolate.line_interpolate_4_with_strategy line_interpolate (with strategy)]
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\* [link geometry.reference.srs.srs_spheroid srs::spheroid]
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}
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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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geographic() = default;
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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, typename Fraction, typename Distance>
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inline void apply(Point const& p0,
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Point const& p1,
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Fraction const& fraction, //fraction of segment
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Point & p,
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Distance const& distance) const
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{
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typedef typename select_calculation_type_alt
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<
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CalculationType,
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Point
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>::type calc_t;
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typedef typename FormulaPolicy::template inverse
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<calc_t, false, true, false, false, false> inverse_t;
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calc_t azimuth = inverse_t::apply(get_as_radian<0>(p0), get_as_radian<1>(p0),
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get_as_radian<0>(p1), get_as_radian<1>(p1),
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m_spheroid).azimuth;
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typedef typename FormulaPolicy::template direct
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<calc_t, true, false, false, false> direct_t;
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typename direct_t::result_type
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dir_r = direct_t::apply(get_as_radian<0>(p0), get_as_radian<1>(p0),
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distance * fraction, azimuth,
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m_spheroid);
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set_from_radian<0>(p, dir_r.lon2);
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set_from_radian<1>(p, dir_r.lat2);
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}
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inline Spheroid model() const
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{
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return m_spheroid;
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}
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private:
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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::line_interpolate::geographic<> type;
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};
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} // namespace services
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#endif // DOXYGEN_NO_STRATEGY_SPECIALIZATIONS
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}} // namespace strategy::line_interpolate
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}} // namespace boost::geometry
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#endif // BOOST_GEOMETRY_STRATEGIES_GEOGRAPHIC_LINE_INTERPOLATE_HPP
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