Chris@16: // Boost.Geometry (aka GGL, Generic Geometry Library)
Chris@16: 
Chris@16: // Copyright (c) 2007-2012 Barend Gehrels, Amsterdam, the Netherlands.
Chris@16: // Copyright (c) 2008-2012 Bruno Lalande, Paris, France.
Chris@16: // Copyright (c) 2009-2012 Mateusz Loskot, London, UK.
Chris@16: 
Chris@16: // Parts of Boost.Geometry are redesigned from Geodan's Geographic Library
Chris@16: // (geolib/GGL), copyright (c) 1995-2010 Geodan, 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_VIEWS_SEGMENT_VIEW_HPP
Chris@16: #define BOOST_GEOMETRY_VIEWS_SEGMENT_VIEW_HPP
Chris@16: 
Chris@16: 
Chris@16: #include <boost/range.hpp>
Chris@16: 
Chris@16: #include <boost/geometry/core/point_type.hpp>
Chris@16: #include <boost/geometry/views/detail/points_view.hpp>
Chris@16: #include <boost/geometry/algorithms/assign.hpp>
Chris@16: 
Chris@16: 
Chris@16: namespace boost { namespace geometry
Chris@16: {
Chris@16: 
Chris@16: 
Chris@16: /*!
Chris@16: \brief Makes a segment behave like a linestring or a range
Chris@101: \details Adapts a segment to the Boost.Range concept, enabling the user to
Chris@16:     iterate the two segment points. The segment_view is registered as a LineString Concept
Chris@16: \tparam Segment \tparam_geometry{Segment}
Chris@16: \ingroup views
Chris@16: 
Chris@16: \qbk{before.synopsis,
Chris@16: [heading Model of]
Chris@16: [link geometry.reference.concepts.concept_linestring LineString Concept]
Chris@16: }
Chris@16: 
Chris@16: \qbk{[include reference/views/segment_view.qbk]}
Chris@16: 
Chris@16: */
Chris@16: template <typename Segment>
Chris@16: struct segment_view
Chris@16:     : public detail::points_view
Chris@16:         <
Chris@101:             typename geometry::point_type<Segment>::type,
Chris@16:             2
Chris@16:         >
Chris@16: {
Chris@16:     typedef typename geometry::point_type<Segment>::type point_type;
Chris@101: 
Chris@16:     /// Constructor accepting the segment to adapt
Chris@16:     explicit segment_view(Segment const& segment)
Chris@16:         : detail::points_view<point_type, 2>(copy_policy(segment))
Chris@16:     {}
Chris@101: 
Chris@101: private :
Chris@101: 
Chris@16:     class copy_policy
Chris@16:     {
Chris@16:     public :
Chris@16:         inline copy_policy(Segment const& segment)
Chris@16:             : m_segment(segment)
Chris@16:         {}
Chris@101: 
Chris@16:         inline void apply(point_type* points) const
Chris@16:         {
Chris@16:             geometry::detail::assign_point_from_index<0>(m_segment, points[0]);
Chris@16:             geometry::detail::assign_point_from_index<1>(m_segment, points[1]);
Chris@16:         }
Chris@16:     private :
Chris@16:         Segment const& m_segment;
Chris@16:     };
Chris@16: 
Chris@16: };
Chris@16: 
Chris@16: 
Chris@16: #ifndef DOXYGEN_NO_TRAITS_SPECIALIZATIONS
Chris@16: 
Chris@16: // All segment ranges can be handled as linestrings
Chris@16: namespace traits
Chris@16: {
Chris@16: 
Chris@16: template<typename Segment>
Chris@16: struct tag<segment_view<Segment> >
Chris@16: {
Chris@16:     typedef linestring_tag type;
Chris@16: };
Chris@16: 
Chris@16: }
Chris@16: 
Chris@16: #endif // DOXYGEN_NO_TRAITS_SPECIALIZATIONS
Chris@16: 
Chris@16: 
Chris@16: }} // namespace boost::geometry
Chris@16: 
Chris@16: 
Chris@16: #endif // BOOST_GEOMETRY_VIEWS_SEGMENT_VIEW_HPP