1 // Boost.Geometry (aka GGL, Generic Geometry Library)
2
3 // Copyright (c) 2007-2012 Barend Gehrels, Amsterdam, the Netherlands.
4
5 // Use, modification and distribution is subject to the Boost Software License,
6 // Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at
7 // http://www.boost.org/LICENSE_1_0.txt)
8
9 #ifndef BOOST_GEOMETRY_ALGORITHMS_DETAIL_OVERLAY_SEGMENT_IDENTIFIER_HPP
10 #define BOOST_GEOMETRY_ALGORITHMS_DETAIL_OVERLAY_SEGMENT_IDENTIFIER_HPP
11
12
13 #if defined(BOOST_GEOMETRY_DEBUG_OVERLAY)
14 # define BOOST_GEOMETRY_DEBUG_SEGMENT_IDENTIFIER
15 #endif
16
17 #if defined(BOOST_GEOMETRY_DEBUG_SEGMENT_IDENTIFIER)
18 #include <iostream>
19 #endif
20
21
22 #include <boost/geometry/algorithms/detail/signed_size_type.hpp>
23 #include <boost/geometry/algorithms/detail/ring_identifier.hpp>
24
25
26 namespace boost { namespace geometry
27 {
28
29
30
31 // Internal struct to uniquely identify a segment
32 // on a linestring,ring
33 // or polygon (needs ring_index)
34 // or multi-geometry (needs multi_index)
35 struct segment_identifier
36 {
segment_identifierboost::geometry::segment_identifier37 inline segment_identifier()
38 : source_index(-1)
39 , multi_index(-1)
40 , ring_index(-1)
41 , segment_index(-1)
42 , piece_index(-1)
43 {}
44
segment_identifierboost::geometry::segment_identifier45 inline segment_identifier(signed_size_type src,
46 signed_size_type mul,
47 signed_size_type rin,
48 signed_size_type seg)
49 : source_index(src)
50 , multi_index(mul)
51 , ring_index(rin)
52 , segment_index(seg)
53 , piece_index(-1)
54 {}
55
operator <boost::geometry::segment_identifier56 inline bool operator<(segment_identifier const& other) const
57 {
58 return source_index != other.source_index ? source_index < other.source_index
59 : multi_index !=other.multi_index ? multi_index < other.multi_index
60 : ring_index != other.ring_index ? ring_index < other.ring_index
61 : piece_index != other.piece_index ? piece_index < other.piece_index
62 : segment_index < other.segment_index
63 ;
64 }
65
operator ==boost::geometry::segment_identifier66 inline bool operator==(segment_identifier const& other) const
67 {
68 return source_index == other.source_index
69 && segment_index == other.segment_index
70 && ring_index == other.ring_index
71 && piece_index == other.piece_index
72 && multi_index == other.multi_index
73 ;
74 }
75
76 #if defined(BOOST_GEOMETRY_DEBUG_SEGMENT_IDENTIFIER)
operator <<(std::ostream & os,segment_identifier const & seg_id)77 friend std::ostream& operator<<(std::ostream &os, segment_identifier const& seg_id)
78 {
79 os
80 << "s:" << seg_id.source_index
81 << ", v:" << seg_id.segment_index // v:vertex because s is used for source
82 ;
83 if (seg_id.ring_index >= 0) os << ", r:" << seg_id.ring_index;
84 if (seg_id.multi_index >= 0) os << ", m:" << seg_id.multi_index;
85 if (seg_id.piece_index >= 0) os << ", p:" << seg_id.piece_index;
86 return os;
87 }
88 #endif
89
90 signed_size_type source_index;
91 signed_size_type multi_index;
92 signed_size_type ring_index;
93 signed_size_type segment_index;
94
95 // For buffer - todo: move this to buffer-only
96 signed_size_type piece_index;
97 };
98
99 #ifndef DOXYGEN_NO_DETAIL
100 namespace detail { namespace overlay
101 {
102
103 // Create a ring identifier from a segment identifier
ring_id_by_seg_id(segment_identifier const & seg_id)104 inline ring_identifier ring_id_by_seg_id(segment_identifier const& seg_id)
105 {
106 return ring_identifier(seg_id.source_index, seg_id.multi_index, seg_id.ring_index);
107 }
108
109 }} // namespace detail::overlay
110 #endif // DOXYGEN_NO_DETAIL
111
112 }} // namespace boost::geometry
113
114 #endif // BOOST_GEOMETRY_ALGORITHMS_DETAIL_OVERLAY_SEGMENT_IDENTIFIER_HPP
115