57 lines
1.5 KiB
C++
57 lines
1.5 KiB
C++
// Boost.Geometry (aka GGL, Generic Geometry Library)
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// Copyright (c) 2007-2012 Barend Gehrels, Amsterdam, the Netherlands.
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// Copyright (c) 2008-2012 Bruno Lalande, Paris, France.
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// Copyright (c) 2009-2012 Mateusz Loskot, London, UK.
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// This file was modified by Oracle on 2021.
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// Modifications copyright (c) 2021 Oracle and/or its affiliates.
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// Contributed and/or modified by Adam Wulkiewicz, on behalf of Oracle
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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_UTIL_ORDER_AS_DIRECTION_HPP
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#define BOOST_GEOMETRY_UTIL_ORDER_AS_DIRECTION_HPP
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#include <boost/geometry/core/point_order.hpp>
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namespace boost { namespace geometry
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{
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/*!
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\brief Flag for iterating a reversible_view in forward or reverse direction
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\ingroup views
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*/
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enum iterate_direction { iterate_forward, iterate_reverse };
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template<order_selector Order>
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struct order_as_direction
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{};
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template<>
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struct order_as_direction<clockwise>
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{
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static const iterate_direction value = iterate_forward;
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};
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template<>
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struct order_as_direction<counterclockwise>
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{
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static const iterate_direction value = iterate_reverse;
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};
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}} // namespace boost::geometry
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#endif // BOOST_GEOMETRY_UTIL_ORDER_AS_DIRECTION_HPP
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