| [/============================================================================ |
| Boost.Geometry (aka GGL, Generic Geometry Library) |
| |
| Copyright (c) 2009-2011 Mateusz Loskot, London, UK. |
| Copyright (c) 2009-2011 Barend Gehrels, Amsterdam, the Netherlands. |
| Copyright (c) 2009-2011 Bruno Lalande, Paris, France. |
| |
| 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) |
| =============================================================================/] |
| |
| [section:concept_ring Ring Concept] |
| |
| [heading Description] |
| [concept Ring..ring] |
| |
| [note Also called linear ring, but we explicitly refer to a filled feature here] |
| |
| [heading Concept Definition] |
| |
| The Ring Concept is defined as following: |
| |
| * there must be a specialization of `traits::tag` defining `ring_tag` as type |
| * it must behave like a Boost.Range Random Access Range |
| * The type defined by the metafunction `range_value<...>::type` must fulfill |
| the [link geometry.reference.concepts.concept_point Point Concept] |
| * there might be a specialization of `traits::point_order` defining the order or orientation of its points, `clockwise` or `counterclockwise` |
| * there might be a specialization of `traits::closure` defining the closure, `open` or `closed` |
| |
| [heading Available Models] |
| * [link geometry.reference.models.model_ring ring] |
| * a Boost.Polygon polygon_data (requires `#include boost/geometry/geometries/adapted/boost_polygon/ring.hpp>`) |
| * a std::vector (requires `#include boost/geometry/geometries/adapted/std_as_ring.hpp>`) |
| * a std::deque (requires `#include boost/geometry/geometries/adapted/std_as_ring.hpp>`) |
| |
| |
| [endsect] |
