comparison DEPENDENCIES/generic/include/boost/geometry/views/box_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_BOX_VIEW_HPP
+#define BOOST_GEOMETRY_VIEWS_BOX_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 box behave like a ring or a range
+\details Adapts a box to the Boost.Range concept, enabling the user to iterating
+    box corners. The box_view is registered as a Ring Concept
+\tparam Box \tparam_geometry{Box}
+\tparam Clockwise If true, walks in clockwise direction, otherwise
+    it walks in counterclockwise direction
+\ingroup views
+
+\qbk{before.synopsis,
+[heading Model of]
+[link geometry.reference.concepts.concept_ring Ring Concept]
+}
+
+\qbk{[include reference/views/box_view.qbk]}
+*/
+template <typename Box, bool Clockwise = true>
+struct box_view 
+    : public detail::points_view
+        <
+            typename geometry::point_type<Box>::type, 
+            5
+        >
+{
+    typedef typename geometry::point_type<Box>::type point_type;
+    
+    /// Constructor accepting the box to adapt
+    explicit box_view(Box const& box)
+        : detail::points_view<point_type, 5>(copy_policy(box))
+    {}
+    
+private :    
+    
+    class copy_policy
+    {
+    public :
+        inline copy_policy(Box const& box)
+            : m_box(box)
+        {}
+        
+        inline void apply(point_type* points) const
+        {
+            detail::assign_box_corners_oriented<!Clockwise>(m_box, points);
+            points[4] = points[0];
+        }
+    private :
+        Box const& m_box;
+    };
+
+};
+
+
+#ifndef DOXYGEN_NO_TRAITS_SPECIALIZATIONS
+
+// All views on boxes are handled as rings
+namespace traits
+{
+
+template<typename Box, bool Clockwise>
+struct tag<box_view<Box, Clockwise> >
+{
+    typedef ring_tag type;
+};
+
+template<typename Box>
+struct point_order<box_view<Box, false> >
+{
+    static order_selector const value = counterclockwise;
+};
+
+
+template<typename Box>
+struct point_order<box_view<Box, true> >
+{
+    static order_selector const value = clockwise;
+};
+
+}
+
+#endif // DOXYGEN_NO_TRAITS_SPECIALIZATIONS
+
+
+}} // namespace boost::geometry
+
+
+#endif // BOOST_GEOMETRY_VIEWS_BOX_VIEW_HPP