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153 lines
3.7 KiB
153 lines
3.7 KiB
// Boost.Geometry (aka GGL, Generic Geometry Library) |
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// Copyright (c) 2007-2011 Barend Gehrels, Amsterdam, the Netherlands. |
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// Copyright (c) 2008-2011 Bruno Lalande, Paris, France. |
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// Copyright (c) 2009-2011 Mateusz Loskot, London, UK. |
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// Parts of Boost.Geometry are redesigned from Geodan's Geographic Library |
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// (geolib/GGL), copyright (c) 1995-2010 Geodan, Amsterdam, the Netherlands. |
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// Use, modification and distribution is subject to the Boost Software License, |
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// Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at |
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// http://www.boost.org/LICENSE_1_0.txt) |
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#ifndef BOOST_GEOMETRY_GEOMETRIES_RING_HPP |
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#define BOOST_GEOMETRY_GEOMETRIES_RING_HPP |
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#include <memory> |
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#include <vector> |
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#include <boost/concept/assert.hpp> |
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#include <boost/geometry/core/closure.hpp> |
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#include <boost/geometry/core/point_order.hpp> |
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#include <boost/geometry/core/tag.hpp> |
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#include <boost/geometry/core/tags.hpp> |
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#include <boost/geometry/geometries/concepts/point_concept.hpp> |
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namespace boost { namespace geometry |
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{ |
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namespace model |
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{ |
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/*! |
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\brief A ring (aka linear ring) is a closed line which should not be selfintersecting |
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\ingroup geometries |
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\tparam Point point type |
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\tparam ClockWise true for clockwise direction, |
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false for CounterClockWise direction |
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\tparam Closed true for closed polygons (last point == first point), |
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false open points |
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\tparam Container container type, for example std::vector, std::deque |
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\tparam Allocator container-allocator-type |
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\qbk{before.synopsis, |
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[heading Model of] |
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[link geometry.reference.concepts.concept_ring Ring Concept] |
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} |
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*/ |
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template |
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< |
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typename Point, |
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bool ClockWise = true, bool Closed = true, |
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template<typename, typename> class Container = std::vector, |
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template<typename> class Allocator = std::allocator |
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> |
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class ring : public Container<Point, Allocator<Point> > |
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{ |
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BOOST_CONCEPT_ASSERT( (concept::Point<Point>) ); |
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typedef Container<Point, Allocator<Point> > base_type; |
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public : |
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/// \constructor_default{ring} |
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inline ring() |
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: base_type() |
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{} |
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/// \constructor_begin_end{ring} |
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template <typename Iterator> |
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inline ring(Iterator begin, Iterator end) |
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: base_type(begin, end) |
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{} |
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}; |
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} // namespace model |
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#ifndef DOXYGEN_NO_TRAITS_SPECIALIZATIONS |
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namespace traits |
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{ |
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template |
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< |
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typename Point, |
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bool ClockWise, bool Closed, |
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template<typename, typename> class Container, |
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template<typename> class Allocator |
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> |
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struct tag<model::ring<Point, ClockWise, Closed, Container, Allocator> > |
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{ |
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typedef ring_tag type; |
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}; |
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template |
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< |
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typename Point, |
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bool Closed, |
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template<typename, typename> class Container, |
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template<typename> class Allocator |
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> |
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struct point_order<model::ring<Point, false, Closed, Container, Allocator> > |
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{ |
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static const order_selector value = counterclockwise; |
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}; |
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template |
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< |
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typename Point, |
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bool Closed, |
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template<typename, typename> class Container, |
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template<typename> class Allocator |
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> |
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struct point_order<model::ring<Point, true, Closed, Container, Allocator> > |
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{ |
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static const order_selector value = clockwise; |
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}; |
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template |
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< |
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typename Point, |
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bool PointOrder, |
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template<typename, typename> class Container, |
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template<typename> class Allocator |
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> |
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struct closure<model::ring<Point, PointOrder, true, Container, Allocator> > |
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{ |
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static const closure_selector value = closed; |
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}; |
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template |
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< |
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typename Point, |
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bool PointOrder, |
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template<typename, typename> class Container, |
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template<typename> class Allocator |
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> |
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struct closure<model::ring<Point, PointOrder, false, Container, Allocator> > |
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{ |
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static const closure_selector value = open; |
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}; |
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} // namespace traits |
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#endif // DOXYGEN_NO_TRAITS_SPECIALIZATIONS |
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}} // namespace boost::geometry |
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#endif // BOOST_GEOMETRY_GEOMETRIES_RING_HPP
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