// Boost.Geometry (aka GGL, Generic Geometry Library)
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// Copyright (c) 2017-2017 Barend Gehrels, Amsterdam, the Netherlands.
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// Copyright (c) 2017 Adam Wulkiewicz, Lodz, Poland.
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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_ALGORITHMS_DETAIL_OVERLAY_IS_SELF_TURN_HPP
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#define BOOST_GEOMETRY_ALGORITHMS_DETAIL_OVERLAY_IS_SELF_TURN_HPP
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#include <boost/geometry/algorithms/detail/overlay/overlay_type.hpp>
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namespace boost { namespace geometry
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{
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#ifndef DOXYGEN_NO_DETAIL
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namespace detail { namespace overlay
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{
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template <overlay_type OverlayType>
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struct is_self_turn_check
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{
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template <typename Turn>
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static inline bool apply(Turn const& turn)
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{
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return turn.operations[0].seg_id.source_index
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== turn.operations[1].seg_id.source_index;
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}
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};
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template <>
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struct is_self_turn_check<overlay_buffer>
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{
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template <typename Turn>
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static inline bool apply(Turn const& /*turn*/)
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{
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return false;
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}
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};
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template <>
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struct is_self_turn_check<overlay_dissolve>
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{
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template <typename Turn>
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static inline bool apply(Turn const& /*turn*/)
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{
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return false;
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}
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};
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template <overlay_type OverlayType, typename Turn>
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bool is_self_turn(Turn const& turn)
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{
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return is_self_turn_check<OverlayType>::apply(turn);
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}
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}} // namespace detail::overlay
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#endif // DOXYGEN_NO_DETAIL
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}} // namespace boost::geometry
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#endif // BOOST_GEOMETRY_ALGORITHMS_DETAIL_OVERLAY_IS_SELF_TURN_HPP
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