Chris@102: // Boost.Geometry (aka GGL, Generic Geometry Library)
Chris@102: 
Chris@102: // Copyright (c) 2007-2012 Barend Gehrels, Amsterdam, the Netherlands.
Chris@102: // Copyright (c) 2008-2012 Bruno Lalande, Paris, France.
Chris@102: // Copyright (c) 2009-2012 Mateusz Loskot, London, UK.
Chris@102: // Copyright (c) 2014 Samuel Debionne, Grenoble, France.
Chris@102: 
Chris@102: // This file was modified by Oracle on 2014.
Chris@102: // Modifications copyright (c) 2014 Oracle and/or its affiliates.
Chris@102: 
Chris@102: // Parts of Boost.Geometry are redesigned from Geodan's Geographic Library
Chris@102: // (geolib/GGL), copyright (c) 1995-2010 Geodan, Amsterdam, the Netherlands.
Chris@102: 
Chris@102: // Use, modification and distribution is subject to the Boost Software License,
Chris@102: // Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at
Chris@102: // http://www.boost.org/LICENSE_1_0.txt)
Chris@102: 
Chris@102: // Contributed and/or modified by Adam Wulkiewicz, on behalf of Oracle
Chris@102: 
Chris@102: #ifndef BOOST_GEOMETRY_ALGORITHMS_CROSSES_HPP
Chris@102: #define BOOST_GEOMETRY_ALGORITHMS_CROSSES_HPP
Chris@102: 
Chris@102: #include <cstddef>
Chris@102: 
Chris@102: #include <boost/variant/apply_visitor.hpp>
Chris@102: #include <boost/variant/static_visitor.hpp>
Chris@102: #include <boost/variant/variant_fwd.hpp>
Chris@102: 
Chris@102: #include <boost/geometry/core/access.hpp>
Chris@102: 
Chris@102: #include <boost/geometry/geometries/concepts/check.hpp>
Chris@102: 
Chris@102: #include <boost/geometry/algorithms/detail/relate/relate.hpp>
Chris@102: 
Chris@102: namespace boost { namespace geometry
Chris@102: {
Chris@102: 
Chris@102: #ifndef DOXYGEN_NO_DISPATCH
Chris@102: namespace dispatch
Chris@102: {
Chris@102: 
Chris@102: 
Chris@102: template
Chris@102: <
Chris@102:     typename Geometry1,
Chris@102:     typename Geometry2,
Chris@102:     typename Tag1 = typename tag<Geometry1>::type,
Chris@102:     typename Tag2 = typename tag<Geometry2>::type
Chris@102: >
Chris@102: struct crosses
Chris@102:     : detail::relate::relate_base
Chris@102:         <
Chris@102:             detail::relate::static_mask_crosses_type,
Chris@102:             Geometry1,
Chris@102:             Geometry2
Chris@102:         >
Chris@102: {};
Chris@102: 
Chris@102: 
Chris@102: } // namespace dispatch
Chris@102: #endif // DOXYGEN_NO_DISPATCH
Chris@102: 
Chris@102: 
Chris@102: namespace resolve_variant
Chris@102: {
Chris@102:     template <typename Geometry1, typename Geometry2>
Chris@102:     struct crosses
Chris@102:     {
Chris@102:         static inline bool
Chris@102:         apply(
Chris@102:               const Geometry1& geometry1,
Chris@102:               const Geometry2& geometry2)
Chris@102:         {
Chris@102:             concept::check<Geometry1 const>();
Chris@102:             concept::check<Geometry2 const>();
Chris@102:             
Chris@102:             return dispatch::crosses<Geometry1, Geometry2>::apply(geometry1, geometry2);
Chris@102:         }
Chris@102:     };
Chris@102:     
Chris@102:     
Chris@102:     template <BOOST_VARIANT_ENUM_PARAMS(typename T), typename Geometry2>
Chris@102:     struct crosses<variant<BOOST_VARIANT_ENUM_PARAMS(T)>, Geometry2>
Chris@102:     {
Chris@102:         struct visitor: static_visitor<bool>
Chris@102:         {
Chris@102:             Geometry2 const& m_geometry2;
Chris@102:             
Chris@102:             visitor(Geometry2 const& geometry2)
Chris@102:             : m_geometry2(geometry2)
Chris@102:             {}
Chris@102:             
Chris@102:             template <typename Geometry1>
Chris@102:             result_type operator()(Geometry1 const& geometry1) const
Chris@102:             {
Chris@102:                 return crosses
Chris@102:                 <
Chris@102:                     Geometry1,
Chris@102:                     Geometry2
Chris@102:                 >::apply
Chris@102:                 (geometry1, m_geometry2);
Chris@102:             }
Chris@102:         };
Chris@102:         
Chris@102:         static inline bool
Chris@102:         apply(variant<BOOST_VARIANT_ENUM_PARAMS(T)> const& geometry1,
Chris@102:               Geometry2 const& geometry2)
Chris@102:         {
Chris@102:             return apply_visitor(visitor(geometry2), geometry1);
Chris@102:         }
Chris@102:     };
Chris@102:     
Chris@102:     
Chris@102:     template <typename Geometry1, BOOST_VARIANT_ENUM_PARAMS(typename T)>
Chris@102:     struct crosses<Geometry1, variant<BOOST_VARIANT_ENUM_PARAMS(T)> >
Chris@102:     {
Chris@102:         struct visitor: static_visitor<bool>
Chris@102:         {
Chris@102:             Geometry1 const& m_geometry1;
Chris@102:             
Chris@102:             visitor(Geometry1 const& geometry1)
Chris@102:             : m_geometry1(geometry1)
Chris@102:             {}
Chris@102:             
Chris@102:             template <typename Geometry2>
Chris@102:             result_type operator()(Geometry2 const& geometry2) const
Chris@102:             {
Chris@102:                 return crosses
Chris@102:                 <
Chris@102:                     Geometry1,
Chris@102:                     Geometry2
Chris@102:                 >::apply
Chris@102:                 (m_geometry1, geometry2);
Chris@102:             }
Chris@102:         };
Chris@102:         
Chris@102:         static inline bool
Chris@102:         apply(
Chris@102:               Geometry1 const& geometry1,
Chris@102:               const variant<BOOST_VARIANT_ENUM_PARAMS(T)>& geometry2)
Chris@102:         {
Chris@102:             return apply_visitor(visitor(geometry1), geometry2);
Chris@102:         }
Chris@102:     };
Chris@102:     
Chris@102:     
Chris@102:     template <BOOST_VARIANT_ENUM_PARAMS(typename T1), BOOST_VARIANT_ENUM_PARAMS(typename T2)>
Chris@102:     struct crosses<variant<BOOST_VARIANT_ENUM_PARAMS(T1)>, variant<BOOST_VARIANT_ENUM_PARAMS(T2)> >
Chris@102:     {
Chris@102:         struct visitor: static_visitor<bool>
Chris@102:         {
Chris@102:             template <typename Geometry1, typename Geometry2>
Chris@102:             result_type operator()(
Chris@102:                                    Geometry1 const& geometry1,
Chris@102:                                    Geometry2 const& geometry2) const
Chris@102:             {
Chris@102:                 return crosses
Chris@102:                 <
Chris@102:                 Geometry1,
Chris@102:                 Geometry2
Chris@102:                 >::apply
Chris@102:                 (geometry1, geometry2);
Chris@102:             }
Chris@102:         };
Chris@102:         
Chris@102:         static inline bool
Chris@102:         apply(
Chris@102:               const variant<BOOST_VARIANT_ENUM_PARAMS(T1)>& geometry1,
Chris@102:               const variant<BOOST_VARIANT_ENUM_PARAMS(T2)>& geometry2)
Chris@102:         {
Chris@102:             return apply_visitor(visitor(), geometry1, geometry2);
Chris@102:         }
Chris@102:     };
Chris@102:     
Chris@102: } // namespace resolve_variant
Chris@102:     
Chris@102:     
Chris@102: /*!
Chris@102: \brief \brief_check2{crosses}
Chris@102: \ingroup crosses
Chris@102: \tparam Geometry1 \tparam_geometry
Chris@102: \tparam Geometry2 \tparam_geometry
Chris@102: \param geometry1 \param_geometry
Chris@102: \param geometry2 \param_geometry
Chris@102: \return \return_check2{crosses}
Chris@102: 
Chris@102: \qbk{[include reference/algorithms/crosses.qbk]}
Chris@102: */
Chris@102: template <typename Geometry1, typename Geometry2>
Chris@102: inline bool crosses(Geometry1 const& geometry1, Geometry2 const& geometry2)
Chris@102: {
Chris@102:     return resolve_variant::crosses<Geometry1, Geometry2>::apply(geometry1, geometry2);
Chris@102: }
Chris@102: 
Chris@102: }} // namespace boost::geometry
Chris@102: 
Chris@102: #endif // BOOST_GEOMETRY_ALGORITHMS_CROSSES_HPP