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