comparison DEPENDENCIES/generic/include/boost/geometry/views/segment_view.hpp @ 16:2665513ce2d3

Add boost headers

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