115 lines
3.6 KiB
C++
115 lines
3.6 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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// 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_SEGMENT_IDENTIFIER_HPP
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#define BOOST_GEOMETRY_ALGORITHMS_DETAIL_OVERLAY_SEGMENT_IDENTIFIER_HPP
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#if defined(BOOST_GEOMETRY_DEBUG_OVERLAY)
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# define BOOST_GEOMETRY_DEBUG_SEGMENT_IDENTIFIER
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#endif
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#if defined(BOOST_GEOMETRY_DEBUG_SEGMENT_IDENTIFIER)
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#include <iostream>
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#endif
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#include <boost/geometry/algorithms/detail/signed_size_type.hpp>
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#include <boost/geometry/algorithms/detail/ring_identifier.hpp>
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namespace boost { namespace geometry
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{
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// Internal struct to uniquely identify a segment
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// on a linestring,ring
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// or polygon (needs ring_index)
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// or multi-geometry (needs multi_index)
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// It is always used for clockwise indication (even if the original is anticlockwise)
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struct segment_identifier
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{
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inline segment_identifier()
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: source_index(-1)
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, multi_index(-1)
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, ring_index(-1)
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, segment_index(-1)
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, piece_index(-1)
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{}
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inline segment_identifier(signed_size_type src,
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signed_size_type mul,
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signed_size_type rin,
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signed_size_type seg)
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: source_index(src)
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, multi_index(mul)
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, ring_index(rin)
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, segment_index(seg)
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, piece_index(-1)
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{}
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inline bool operator<(segment_identifier const& other) const
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{
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return source_index != other.source_index ? source_index < other.source_index
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: multi_index !=other.multi_index ? multi_index < other.multi_index
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: ring_index != other.ring_index ? ring_index < other.ring_index
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: piece_index != other.piece_index ? piece_index < other.piece_index
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: segment_index < other.segment_index
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;
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}
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inline bool operator==(segment_identifier const& other) const
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{
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return source_index == other.source_index
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&& segment_index == other.segment_index
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&& ring_index == other.ring_index
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&& piece_index == other.piece_index
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&& multi_index == other.multi_index
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;
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}
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#if defined(BOOST_GEOMETRY_DEBUG_SEGMENT_IDENTIFIER)
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friend std::ostream& operator<<(std::ostream &os, segment_identifier const& seg_id)
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{
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os
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<< "s:" << seg_id.source_index
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<< ", v:" << seg_id.segment_index // v:vertex because s is used for source
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;
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if (seg_id.ring_index >= 0) os << ", r:" << seg_id.ring_index;
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if (seg_id.multi_index >= 0) os << ", m:" << seg_id.multi_index;
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if (seg_id.piece_index >= 0) os << ", p:" << seg_id.piece_index;
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return os;
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}
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#endif
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signed_size_type source_index;
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signed_size_type multi_index;
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signed_size_type ring_index;
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signed_size_type segment_index;
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// For buffer - todo: move this to buffer-only
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signed_size_type piece_index;
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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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// Create a ring identifier from a segment identifier
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inline ring_identifier ring_id_by_seg_id(segment_identifier const& seg_id)
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{
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return ring_identifier(seg_id.source_index, seg_id.multi_index, seg_id.ring_index);
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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_SEGMENT_IDENTIFIER_HPP
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