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Diffstat (limited to 'boost/geometry/algorithms/detail/touches/interface.hpp')
| -rw-r--r-- | boost/geometry/algorithms/detail/touches/interface.hpp | 321 |
1 files changed, 321 insertions, 0 deletions
diff --git a/boost/geometry/algorithms/detail/touches/interface.hpp b/boost/geometry/algorithms/detail/touches/interface.hpp new file mode 100644 index 0000000000..d2e0cc8c4e --- /dev/null +++ b/boost/geometry/algorithms/detail/touches/interface.hpp @@ -0,0 +1,321 @@ +// 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 |