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- // Boost.Geometry (aka GGL, Generic Geometry Library)
- // Copyright (c) 2007-2015 Barend Gehrels, Amsterdam, the Netherlands.
- // Copyright (c) 2008-2015 Bruno Lalande, Paris, France.
- // Copyright (c) 2009-2015 Mateusz Loskot, London, UK.
- // Copyright (c) 2013-2015 Adam Wulkiewicz, Lodz, Poland.
- // This file was modified by Oracle on 2013, 2014, 2015, 2017.
- // Modifications copyright (c) 2013-2017, Oracle and/or its affiliates.
- // 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_TOUCHES_INTERFACE_HPP
- #define BOOST_GEOMETRY_ALGORITHMS_DETAIL_TOUCHES_INTERFACE_HPP
- #include <deque>
- #include <boost/variant/apply_visitor.hpp>
- #include <boost/variant/static_visitor.hpp>
- #include <boost/variant/variant_fwd.hpp>
- #include <boost/geometry/core/reverse_dispatch.hpp>
- #include <boost/geometry/core/tag.hpp>
- #include <boost/geometry/core/tag_cast.hpp>
- #include <boost/geometry/core/tags.hpp>
- #include <boost/geometry/geometries/concepts/check.hpp>
- #include <boost/geometry/strategies/default_strategy.hpp>
- #include <boost/geometry/strategies/relate.hpp>
- namespace boost { namespace geometry
- {
- #ifndef DOXYGEN_NO_DISPATCH
- namespace dispatch {
- // TODO: Since CastedTags are used is Reverse needed?
- template
- <
- typename Geometry1,
- typename Geometry2,
- typename Tag1 = typename tag<Geometry1>::type,
- typename Tag2 = typename tag<Geometry2>::type,
- typename CastedTag1 = typename tag_cast<Tag1, pointlike_tag, linear_tag, areal_tag>::type,
- typename CastedTag2 = typename tag_cast<Tag2, pointlike_tag, linear_tag, areal_tag>::type,
- bool Reverse = reverse_dispatch<Geometry1, Geometry2>::type::value
- >
- struct touches
- : not_implemented<Tag1, Tag2>
- {};
- // If reversal is needed, perform it
- template
- <
- typename Geometry1, typename Geometry2,
- typename Tag1, typename Tag2,
- typename CastedTag1, typename CastedTag2
- >
- struct touches<Geometry1, Geometry2, Tag1, Tag2, CastedTag1, CastedTag2, true>
- : touches<Geometry2, Geometry1, Tag2, Tag1, CastedTag2, CastedTag1, false>
- {
- template <typename Strategy>
- static inline bool apply(Geometry1 const& g1, Geometry2 const& g2, Strategy const& strategy)
- {
- return touches<Geometry2, Geometry1>::apply(g2, g1, strategy);
- }
- };
- } // namespace dispatch
- #endif // DOXYGEN_NO_DISPATCH
- namespace resolve_strategy
- {
- struct touches
- {
- template <typename Geometry1, typename Geometry2, typename Strategy>
- static inline bool apply(Geometry1 const& geometry1,
- Geometry2 const& geometry2,
- Strategy const& strategy)
- {
- return dispatch::touches
- <
- Geometry1, Geometry2
- >::apply(geometry1, geometry2, strategy);
- }
- template <typename Geometry1, typename Geometry2>
- static inline bool apply(Geometry1 const& geometry1,
- Geometry2 const& geometry2,
- default_strategy)
- {
- typedef typename strategy::relate::services::default_strategy
- <
- Geometry1,
- Geometry2
- >::type strategy_type;
- return dispatch::touches
- <
- Geometry1, Geometry2
- >::apply(geometry1, geometry2, strategy_type());
- }
- };
- } // namespace resolve_strategy
- namespace resolve_variant {
- template <typename Geometry1, typename Geometry2>
- struct touches
- {
- template <typename Strategy>
- static bool apply(Geometry1 const& geometry1, Geometry2 const& geometry2, Strategy const& strategy)
- {
- concepts::check<Geometry1 const>();
- concepts::check<Geometry2 const>();
- return resolve_strategy::touches::apply(geometry1, geometry2, strategy);
- }
- };
- template <BOOST_VARIANT_ENUM_PARAMS(typename T), typename Geometry2>
- struct touches<boost::variant<BOOST_VARIANT_ENUM_PARAMS(T)>, Geometry2>
- {
- template <typename Strategy>
- struct visitor: boost::static_visitor<bool>
- {
- Geometry2 const& m_geometry2;
- Strategy const& m_strategy;
- visitor(Geometry2 const& geometry2, Strategy const& strategy)
- : m_geometry2(geometry2)
- , m_strategy(strategy)
- {}
- template <typename Geometry1>
- bool operator()(Geometry1 const& geometry1) const
- {
- return touches<Geometry1, Geometry2>::apply(geometry1, m_geometry2, m_strategy);
- }
- };
- template <typename Strategy>
- static inline bool 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 touches<Geometry1, boost::variant<BOOST_VARIANT_ENUM_PARAMS(T)> >
- {
- template <typename Strategy>
- struct visitor: boost::static_visitor<bool>
- {
- Geometry1 const& m_geometry1;
- Strategy const& m_strategy;
- visitor(Geometry1 const& geometry1, Strategy const& strategy)
- : m_geometry1(geometry1)
- , m_strategy(strategy)
- {}
- template <typename Geometry2>
- bool operator()(Geometry2 const& geometry2) const
- {
- return touches<Geometry1, Geometry2>::apply(m_geometry1, geometry2, m_strategy);
- }
- };
- template <typename Strategy>
- static inline bool 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 touches<boost::variant<BOOST_VARIANT_ENUM_PARAMS(T1)>,
- boost::variant<BOOST_VARIANT_ENUM_PARAMS(T2)> >
- {
- template <typename Strategy>
- struct visitor: boost::static_visitor<bool>
- {
- Strategy const& m_strategy;
- visitor(Strategy const& strategy)
- : m_strategy(strategy)
- {}
- template <typename Geometry1, typename Geometry2>
- bool operator()(Geometry1 const& geometry1,
- Geometry2 const& geometry2) const
- {
- return touches<Geometry1, Geometry2>::apply(geometry1, geometry2, m_strategy);
- }
- };
- template <typename Strategy>
- static inline bool 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);
- }
- };
- template <typename Geometry>
- struct self_touches;
- template <BOOST_VARIANT_ENUM_PARAMS(typename T)>
- struct self_touches<boost::variant<BOOST_VARIANT_ENUM_PARAMS(T)> >
- {
- struct visitor: boost::static_visitor<bool>
- {
- template <typename Geometry>
- bool operator()(Geometry const& geometry) const
- {
- return self_touches<Geometry>::apply(geometry);
- }
- };
- static inline bool
- apply(boost::variant<BOOST_VARIANT_ENUM_PARAMS(T)> const& geometry)
- {
- return boost::apply_visitor(visitor(), geometry);
- }
- };
- } // namespace resolve_variant
- /*!
- \brief \brief_check{has at least one touching point (self-tangency)}
- \note This function can be called for one geometry (self-tangency) and
- also for two geometries (touch)
- \ingroup touches
- \tparam Geometry \tparam_geometry
- \param geometry \param_geometry
- \return \return_check{is self-touching}
- \qbk{distinguish,one geometry}
- \qbk{[def __one_parameter__]}
- \qbk{[include reference/algorithms/touches.qbk]}
- */
- template <typename Geometry>
- inline bool touches(Geometry const& geometry)
- {
- return resolve_variant::self_touches<Geometry>::apply(geometry);
- }
- /*!
- \brief \brief_check2{have at least one touching point (tangent - non overlapping)}
- \ingroup touches
- \tparam Geometry1 \tparam_geometry
- \tparam Geometry2 \tparam_geometry
- \param geometry1 \param_geometry
- \param geometry2 \param_geometry
- \return \return_check2{touch each other}
- \qbk{distinguish,two geometries}
- \qbk{[include reference/algorithms/touches.qbk]}
- */
- template <typename Geometry1, typename Geometry2>
- inline bool touches(Geometry1 const& geometry1, Geometry2 const& geometry2)
- {
- return resolve_variant::touches
- <
- Geometry1, Geometry2
- >::apply(geometry1, geometry2, default_strategy());
- }
- /*!
- \brief \brief_check2{have at least one touching point (tangent - non overlapping)}
- \ingroup touches
- \tparam Geometry1 \tparam_geometry
- \tparam Geometry2 \tparam_geometry
- \tparam Strategy \tparam_strategy{Touches}
- \param geometry1 \param_geometry
- \param geometry2 \param_geometry
- \param strategy \param_strategy{touches}
- \return \return_check2{touch each other}
- \qbk{distinguish,with strategy}
- \qbk{[include reference/algorithms/touches.qbk]}
- */
- template <typename Geometry1, typename Geometry2, typename Strategy>
- inline bool touches(Geometry1 const& geometry1,
- Geometry2 const& geometry2,
- Strategy const& strategy)
- {
- return resolve_variant::touches
- <
- Geometry1, Geometry2
- >::apply(geometry1, geometry2, strategy);
- }
- }} // namespace boost::geometry
- #endif // BOOST_GEOMETRY_ALGORITHMS_DETAIL_TOUCHES_INTERFACE_HPP
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