152 lines
4.2 KiB
C++
152 lines
4.2 KiB
C++
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// Boost.Geometry
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// Copyright (c) 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_SIMPLIFY_SPHERICAL_HPP
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#define BOOST_GEOMETRY_STRATEGIES_SIMPLIFY_SPHERICAL_HPP
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#include <boost/geometry/strategies/detail.hpp>
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#include <boost/geometry/strategies/distance/comparable.hpp>
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#include <boost/geometry/strategies/distance/detail.hpp>
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#include <boost/geometry/strategies/simplify/services.hpp>
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#include <boost/geometry/strategies/agnostic/simplify_douglas_peucker.hpp>
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#include <boost/geometry/strategies/spherical/distance_haversine.hpp>
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#include <boost/geometry/strategies/spherical/distance_cross_track.hpp>
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#include <boost/geometry/strategies/spherical/point_in_point.hpp>
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#include <boost/geometry/strategy/spherical/area.hpp>
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namespace boost { namespace geometry
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{
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namespace strategies { namespace simplify
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{
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template
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<
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typename RadiusTypeOrSphere = double,
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typename CalculationType = void
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>
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class spherical
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: public strategies::detail::spherical_base<RadiusTypeOrSphere>
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{
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using base_t = strategies::detail::spherical_base<RadiusTypeOrSphere>;
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public:
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spherical() = default;
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template <typename RadiusOrSphere>
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explicit spherical(RadiusOrSphere const& radius_or_sphere)
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: base_t(radius_or_sphere)
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{}
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// TODO: Replace this if calculate_point_order() is used in simplify
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template <typename Geometry>
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auto area(Geometry const&) const
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{
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return strategy::area::spherical
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<
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typename base_t::radius_type, CalculationType
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>(base_t::radius());
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}
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// For perimeter()
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template <typename Geometry1, typename Geometry2>
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auto distance(Geometry1 const&, Geometry2 const&,
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distance::detail::enable_if_pp_t<Geometry1, Geometry2> * = nullptr) const
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{
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return strategy::distance::haversine
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<
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typename base_t::radius_type, CalculationType
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>(base_t::radius());
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}
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// For douglas_peucker
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template <typename Geometry1, typename Geometry2>
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auto distance(Geometry1 const&, Geometry2 const&,
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distance::detail::enable_if_ps_t<Geometry1, Geometry2> * = nullptr) const
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{
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return strategy::distance::cross_track
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<
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CalculationType,
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strategy::distance::haversine<typename base_t::radius_type, CalculationType>
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>(base_t::radius());
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}
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// For equals()
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template <typename Geometry1, typename Geometry2>
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static auto relate(Geometry1 const&, Geometry2 const&,
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std::enable_if_t
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<
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util::is_pointlike<Geometry1>::value
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&& util::is_pointlike<Geometry2>::value
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> * = nullptr)
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{
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return strategy::within::spherical_point_point();
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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, spherical_equatorial_tag>
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{
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using type = strategies::simplify::spherical<>;
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};
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template <typename P, typename CT, typename S>
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struct strategy_converter
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<
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strategy::simplify::douglas_peucker
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<
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P,
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strategy::distance::cross_track<CT, S>
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>
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>
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{
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template <typename Strategy>
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static auto get(Strategy const& )
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{
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return strategies::simplify::spherical<typename S::radius_type, CT>();
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}
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};
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template <typename P, typename CT, typename S>
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struct strategy_converter
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<
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strategy::simplify::douglas_peucker
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<
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P,
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strategy::distance::comparable::cross_track<CT, S>
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>
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>
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{
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template <typename Strategy>
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static auto get(Strategy const& )
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{
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return strategies::distance::detail::comparable
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<
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strategies::simplify::spherical<typename S::radius_type, CT>
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>();
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}
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};
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} // namespace services
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}} // namespace strategies::simplify
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}} // namespace boost::geometry
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#endif // BOOST_GEOMETRY_STRATEGIES_SIMPLIFY_SPHERICAL_HPP
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