Chris@16: // Boost.Geometry (aka GGL, Generic Geometry Library)
Chris@16: 
Chris@16: // Copyright (c) 2007-2012 Barend Gehrels, Amsterdam, the Netherlands.
Chris@16: 
Chris@16: // Use, modification and distribution is subject to the Boost Software License,
Chris@16: // Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at
Chris@16: // http://www.boost.org/LICENSE_1_0.txt)
Chris@16: 
Chris@16: #ifndef BOOST_GEOMETRY_GEOMETRY_POLICIES_RELATE_TUPLED_HPP
Chris@16: #define BOOST_GEOMETRY_GEOMETRY_POLICIES_RELATE_TUPLED_HPP
Chris@16: 
Chris@16: 
Chris@16: #include <string>
Chris@16: 
Chris@16: #include <boost/tuple/tuple.hpp>
Chris@16: #include <boost/geometry/strategies/side_info.hpp>
Chris@16: 
Chris@16: namespace boost { namespace geometry
Chris@16: {
Chris@16: 
Chris@16: namespace policies { namespace relate
Chris@16: {
Chris@16: 
Chris@16: 
Chris@16: // "tupled" to return intersection results together.
Chris@16: // Now with two, with some meta-programming and derivations it can also be three (or more)
Chris@101: template <typename Policy1, typename Policy2>
Chris@16: struct segments_tupled
Chris@16: {
Chris@16:     typedef boost::tuple
Chris@16:         <
Chris@16:             typename Policy1::return_type,
Chris@16:             typename Policy2::return_type
Chris@16:         > return_type;
Chris@16: 
Chris@101:     template <typename Segment1, typename Segment2, typename SegmentIntersectionInfo>
Chris@101:     static inline return_type segments_crosses(side_info const& sides,
Chris@101:                     SegmentIntersectionInfo const& sinfo,
Chris@101:                     Segment1 const& s1, Segment2 const& s2)
Chris@16:     {
Chris@16:         return boost::make_tuple
Chris@16:             (
Chris@101:                 Policy1::segments_crosses(sides, sinfo, s1, s2),
Chris@101:                 Policy2::segments_crosses(sides, sinfo, s1, s2)
Chris@16:             );
Chris@16:     }
Chris@16: 
Chris@101:     template <typename Segment1, typename Segment2, typename Ratio>
Chris@101:     static inline return_type segments_collinear(
Chris@101:                     Segment1 const& segment1, Segment2 const& segment2,
Chris@101:                     bool opposite,
Chris@101:                     int pa1, int pa2, int pb1, int pb2,
Chris@101:                     Ratio const& ra1, Ratio const& ra2,
Chris@101:                     Ratio const& rb1, Ratio const& rb2)
Chris@16:     {
Chris@16:         return boost::make_tuple
Chris@16:             (
Chris@101:                 Policy1::segments_collinear(segment1, segment2,
Chris@101:                                             opposite,
Chris@101:                                             pa1, pa2, pb1, pb2,
Chris@101:                                             ra1, ra2, rb1, rb2),
Chris@101:                 Policy2::segments_collinear(segment1, segment2,
Chris@101:                                             opposite,
Chris@101:                                             pa1, pa2, pb1, pb2,
Chris@101:                                             ra1, ra2, rb1, rb2)
Chris@16:             );
Chris@16:     }
Chris@16: 
Chris@101:     template <typename Segment>
Chris@101:     static inline return_type degenerate(Segment const& segment,
Chris@16:                 bool a_degenerate)
Chris@16:     {
Chris@16:         return boost::make_tuple
Chris@16:             (
Chris@16:                 Policy1::degenerate(segment, a_degenerate),
Chris@16:                 Policy2::degenerate(segment, a_degenerate)
Chris@16:             );
Chris@16:     }
Chris@16: 
Chris@101:     template <typename Segment, typename Ratio>
Chris@101:     static inline return_type one_degenerate(Segment const& segment,
Chris@101:             Ratio const& ratio,
Chris@101:             bool a_degenerate)
Chris@101:     {
Chris@101:         return boost::make_tuple
Chris@101:             (
Chris@101:                 Policy1::one_degenerate(segment, ratio, a_degenerate),
Chris@101:                 Policy2::one_degenerate(segment, ratio, a_degenerate)
Chris@101:             );
Chris@101:     }
Chris@101: 
Chris@16:     static inline return_type disjoint()
Chris@16:     {
Chris@16:         return boost::make_tuple
Chris@16:             (
Chris@16:                 Policy1::disjoint(),
Chris@16:                 Policy2::disjoint()
Chris@16:             );
Chris@16:     }
Chris@16: 
Chris@16:     static inline return_type error(std::string const& msg)
Chris@16:     {
Chris@16:         return boost::make_tuple
Chris@16:             (
Chris@16:                 Policy1::error(msg),
Chris@16:                 Policy2::error(msg)
Chris@16:             );
Chris@16:     }
Chris@16: 
Chris@16: };
Chris@16: 
Chris@16: }} // namespace policies::relate
Chris@16: 
Chris@16: }} // namespace boost::geometry
Chris@16: 
Chris@16: #endif // BOOST_GEOMETRY_GEOMETRY_POLICIES_RELATE_TUPLED_HPP