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- // Boost.Geometry (aka GGL, Generic Geometry Library)
- // Copyright (c) 2007-2014 Barend Gehrels, Amsterdam, the Netherlands.
- // Copyright (c) 2008-2014 Bruno Lalande, Paris, France.
- // Copyright (c) 2009-2014 Mateusz Loskot, London, UK.
- // This file was modified by Oracle on 2014, 2019.
- // Modifications copyright (c) 2014, 2019, Oracle and/or its affiliates.
- // Contributed and/or modified by Menelaos Karavelas, on behalf of Oracle
- // Contributed and/or modified by Adam Wulkiewicz, on behalf of Oracle
- // Parts of Boost.Geometry are redesigned from Geodan's Geographic Library
- // (geolib/GGL), copyright (c) 1995-2010 Geodan, Amsterdam, the Netherlands.
- // Use, modification and distribution is subject to the Boost Software License,
- // Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at
- // http://www.boost.org/LICENSE_1_0.txt)
- #ifndef BOOST_GEOMETRY_ALGORITHMS_DETAIL_COMPARABLE_DISTANCE_INTERFACE_HPP
- #define BOOST_GEOMETRY_ALGORITHMS_DETAIL_COMPARABLE_DISTANCE_INTERFACE_HPP
- #include <boost/geometry/geometries/concepts/check.hpp>
- #include <boost/geometry/strategies/comparable_distance_result.hpp>
- #include <boost/geometry/strategies/default_comparable_distance_result.hpp>
- #include <boost/geometry/strategies/distance.hpp>
- #include <boost/geometry/algorithms/detail/distance/interface.hpp>
- namespace boost { namespace geometry
- {
- namespace resolve_strategy
- {
- template <typename Strategy>
- struct comparable_distance
- {
- template <typename Geometry1, typename Geometry2>
- static inline
- typename comparable_distance_result<Geometry1, Geometry2, Strategy>::type
- apply(Geometry1 const& geometry1,
- Geometry2 const& geometry2,
- Strategy const& strategy)
- {
- typedef typename strategy::distance::services::comparable_type
- <
- Strategy
- >::type comparable_strategy_type;
- return dispatch::distance
- <
- Geometry1, Geometry2, comparable_strategy_type
- >::apply(geometry1,
- geometry2,
- strategy::distance::services::get_comparable
- <
- Strategy
- >::apply(strategy));
- }
- };
- template <>
- struct comparable_distance<default_strategy>
- {
- template <typename Geometry1, typename Geometry2>
- static inline typename comparable_distance_result
- <
- Geometry1, Geometry2, default_strategy
- >::type
- apply(Geometry1 const& geometry1,
- Geometry2 const& geometry2,
- default_strategy)
- {
- typedef typename strategy::distance::services::comparable_type
- <
- typename detail::distance::default_strategy
- <
- Geometry1, Geometry2
- >::type
- >::type comparable_strategy_type;
- return dispatch::distance
- <
- Geometry1, Geometry2, comparable_strategy_type
- >::apply(geometry1, geometry2, comparable_strategy_type());
- }
- };
- } // namespace resolve_strategy
- namespace resolve_variant
- {
- template <typename Geometry1, typename Geometry2>
- struct comparable_distance
- {
- template <typename Strategy>
- static inline
- typename comparable_distance_result<Geometry1, Geometry2, Strategy>::type
- apply(Geometry1 const& geometry1,
- Geometry2 const& geometry2,
- Strategy const& strategy)
- {
- return resolve_strategy::comparable_distance
- <
- Strategy
- >::apply(geometry1, geometry2, strategy);
- }
- };
- template <BOOST_VARIANT_ENUM_PARAMS(typename T), typename Geometry2>
- struct comparable_distance
- <
- boost::variant<BOOST_VARIANT_ENUM_PARAMS(T)>,
- Geometry2
- >
- {
- template <typename Strategy>
- struct visitor: static_visitor
- <
- typename comparable_distance_result
- <
- boost::variant<BOOST_VARIANT_ENUM_PARAMS(T)>,
- Geometry2,
- Strategy
- >::type
- >
- {
- Geometry2 const& m_geometry2;
- Strategy const& m_strategy;
- visitor(Geometry2 const& geometry2,
- Strategy const& strategy)
- : m_geometry2(geometry2),
- m_strategy(strategy)
- {}
- template <typename Geometry1>
- typename comparable_distance_result
- <
- Geometry1, Geometry2, Strategy
- >::type
- operator()(Geometry1 const& geometry1) const
- {
- return comparable_distance
- <
- Geometry1,
- Geometry2
- >::template apply
- <
- Strategy
- >(geometry1, m_geometry2, m_strategy);
- }
- };
- template <typename Strategy>
- static inline typename comparable_distance_result
- <
- boost::variant<BOOST_VARIANT_ENUM_PARAMS(T)>,
- Geometry2,
- Strategy
- >::type
- apply(boost::variant<BOOST_VARIANT_ENUM_PARAMS(T)> const& geometry1,
- Geometry2 const& geometry2,
- Strategy const& strategy)
- {
- return boost::apply_visitor(visitor<Strategy>(geometry2, strategy), geometry1);
- }
- };
- template <typename Geometry1, BOOST_VARIANT_ENUM_PARAMS(typename T)>
- struct comparable_distance
- <
- Geometry1,
- boost::variant<BOOST_VARIANT_ENUM_PARAMS(T)>
- >
- {
- template <typename Strategy>
- struct visitor: static_visitor
- <
- typename comparable_distance_result
- <
- Geometry1,
- boost::variant<BOOST_VARIANT_ENUM_PARAMS(T)>,
- Strategy
- >::type
- >
- {
- Geometry1 const& m_geometry1;
- Strategy const& m_strategy;
- visitor(Geometry1 const& geometry1,
- Strategy const& strategy)
- : m_geometry1(geometry1),
- m_strategy(strategy)
- {}
- template <typename Geometry2>
- typename comparable_distance_result
- <
- Geometry1, Geometry2, Strategy
- >::type
- operator()(Geometry2 const& geometry2) const
- {
- return comparable_distance
- <
- Geometry1,
- Geometry2
- >::template apply
- <
- Strategy
- >(m_geometry1, geometry2, m_strategy);
- }
- };
- template <typename Strategy>
- static inline typename comparable_distance_result
- <
- Geometry1,
- boost::variant<BOOST_VARIANT_ENUM_PARAMS(T)>,
- Strategy
- >::type
- apply(Geometry1 const& geometry1,
- boost::variant<BOOST_VARIANT_ENUM_PARAMS(T)> const& geometry2,
- Strategy const& strategy)
- {
- return boost::apply_visitor(visitor<Strategy>(geometry1, strategy), geometry2);
- }
- };
- template
- <
- BOOST_VARIANT_ENUM_PARAMS(typename T1),
- BOOST_VARIANT_ENUM_PARAMS(typename T2)
- >
- struct comparable_distance
- <
- boost::variant<BOOST_VARIANT_ENUM_PARAMS(T1)>,
- boost::variant<BOOST_VARIANT_ENUM_PARAMS(T2)>
- >
- {
- template <typename Strategy>
- struct visitor: static_visitor
- <
- typename comparable_distance_result
- <
- boost::variant<BOOST_VARIANT_ENUM_PARAMS(T1)>,
- boost::variant<BOOST_VARIANT_ENUM_PARAMS(T2)>,
- Strategy
- >::type
- >
- {
- Strategy const& m_strategy;
- visitor(Strategy const& strategy)
- : m_strategy(strategy)
- {}
- template <typename Geometry1, typename Geometry2>
- typename comparable_distance_result
- <
- Geometry1, Geometry2, Strategy
- >::type
- operator()(Geometry1 const& geometry1, Geometry2 const& geometry2) const
- {
- return comparable_distance
- <
- Geometry1,
- Geometry2
- >::template apply
- <
- Strategy
- >(geometry1, geometry2, m_strategy);
- }
- };
- template <typename Strategy>
- static inline typename comparable_distance_result
- <
- boost::variant<BOOST_VARIANT_ENUM_PARAMS(T1)>,
- boost::variant<BOOST_VARIANT_ENUM_PARAMS(T2)>,
- Strategy
- >::type
- apply(boost::variant<BOOST_VARIANT_ENUM_PARAMS(T1)> const& geometry1,
- boost::variant<BOOST_VARIANT_ENUM_PARAMS(T2)> const& geometry2,
- Strategy const& strategy)
- {
- return boost::apply_visitor(visitor<Strategy>(strategy), geometry1, geometry2);
- }
- };
- } // namespace resolve_variant
- /*!
- \brief \brief_calc2{comparable distance measurement} \brief_strategy
- \ingroup distance
- \details The free function comparable_distance does not necessarily calculate the distance,
- but it calculates a distance measure such that two distances are comparable to each other.
- For example: for the Cartesian coordinate system, Pythagoras is used but the square root
- is not taken, which makes it faster and the results of two point pairs can still be
- compared to each other.
- \tparam Geometry1 first geometry type
- \tparam Geometry2 second geometry type
- \tparam Strategy \tparam_strategy{Distance}
- \param geometry1 \param_geometry
- \param geometry2 \param_geometry
- \param strategy \param_strategy{distance}
- \return \return_calc{comparable distance}
- \qbk{distinguish,with strategy}
- */
- template <typename Geometry1, typename Geometry2, typename Strategy>
- inline typename comparable_distance_result<Geometry1, Geometry2, Strategy>::type
- comparable_distance(Geometry1 const& geometry1, Geometry2 const& geometry2,
- Strategy const& strategy)
- {
- concepts::check<Geometry1 const>();
- concepts::check<Geometry2 const>();
- return resolve_variant::comparable_distance
- <
- Geometry1,
- Geometry2
- >::apply(geometry1, geometry2, strategy);
- }
- /*!
- \brief \brief_calc2{comparable distance measurement}
- \ingroup distance
- \details The free function comparable_distance does not necessarily calculate the distance,
- but it calculates a distance measure such that two distances are comparable to each other.
- For example: for the Cartesian coordinate system, Pythagoras is used but the square root
- is not taken, which makes it faster and the results of two point pairs can still be
- compared to each other.
- \tparam Geometry1 first geometry type
- \tparam Geometry2 second geometry type
- \param geometry1 \param_geometry
- \param geometry2 \param_geometry
- \return \return_calc{comparable distance}
- \qbk{[include reference/algorithms/comparable_distance.qbk]}
- */
- template <typename Geometry1, typename Geometry2>
- inline typename default_comparable_distance_result<Geometry1, Geometry2>::type
- comparable_distance(Geometry1 const& geometry1, Geometry2 const& geometry2)
- {
- concepts::check<Geometry1 const>();
- concepts::check<Geometry2 const>();
- return geometry::comparable_distance(geometry1, geometry2, default_strategy());
- }
- }} // namespace boost::geometry
- #endif // BOOST_GEOMETRY_ALGORITHMS_DETAIL_COMPARABLE_DISTANCE_INTERFACE_HPP
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