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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_CHECK_ENRICH_HPP | |
10 | #define BOOST_GEOMETRY_ALGORITHMS_DETAIL_OVERLAY_CHECK_ENRICH_HPP | |
11 | ||
12 | ||
13 | #include <cstddef> | |
14 | ||
15 | #include <boost/range.hpp> | |
16 | ||
17 | #include <boost/geometry/algorithms/detail/ring_identifier.hpp> | |
18 | ||
19 | ||
20 | namespace boost { namespace geometry | |
21 | { | |
22 | ||
23 | #ifndef DOXYGEN_NO_DETAIL | |
24 | namespace detail { namespace overlay | |
25 | { | |
26 | ||
27 | ||
28 | template<typename Turn> | |
29 | struct meta_turn | |
30 | { | |
31 | int index; | |
32 | Turn const* turn; | |
33 | bool handled[2]; | |
34 | ||
35 | inline meta_turn(int i, Turn const& t) | |
36 | : index(i), turn(&t) | |
37 | { | |
38 | handled[0] = false; | |
39 | handled[1] = false; | |
40 | } | |
41 | }; | |
42 | ||
43 | ||
44 | template <typename MetaTurn> | |
45 | inline void display(MetaTurn const& meta_turn, std::string const& reason = "") | |
46 | { | |
47 | #ifdef BOOST_GEOMETRY_DEBUG_ENRICH | |
48 | std::cout << meta_turn.index | |
49 | << "\tMethods: " << method_char(meta_turn.turn->method) | |
50 | << " operations: " << operation_char(meta_turn.turn->operations[0].operation) | |
51 | << operation_char(meta_turn.turn->operations[1].operation) | |
52 | << " travels to " << meta_turn.turn->operations[0].enriched.travels_to_ip_index | |
53 | << " and " << meta_turn.turn->operations[1].enriched.travels_to_ip_index | |
54 | //<< " -> " << op_index | |
55 | << " " << reason | |
56 | << std::endl; | |
57 | #endif | |
58 | } | |
59 | ||
60 | ||
61 | template <typename MetaTurns, typename MetaTurn> | |
62 | inline void check_detailed(MetaTurns& meta_turns, MetaTurn const& meta_turn, | |
63 | int op_index, int cycle, int start, operation_type for_operation, | |
64 | bool& error) | |
65 | { | |
66 | display(meta_turn); | |
67 | int const ip_index = meta_turn.turn->operations[op_index].enriched.travels_to_ip_index; | |
68 | if (ip_index >= 0) | |
69 | { | |
70 | bool found = false; | |
71 | ||
72 | if (ip_index == start) | |
73 | { | |
74 | display(meta_turns[ip_index], " FINISH"); | |
75 | return; | |
76 | } | |
77 | ||
78 | // check on continuing, or on same-operation-on-same-geometry | |
79 | if (! meta_turns[ip_index].handled[op_index] | |
80 | && (meta_turns[ip_index].turn->operations[op_index].operation == operation_continue | |
81 | || meta_turns[ip_index].turn->operations[op_index].operation == for_operation) | |
82 | ) | |
83 | { | |
84 | meta_turns[ip_index].handled[op_index] = true; | |
85 | check_detailed(meta_turns, meta_turns[ip_index], op_index, cycle, start, for_operation, error); | |
86 | found = true; | |
87 | } | |
88 | // check on other geometry | |
89 | if (! found) | |
90 | { | |
91 | int const other_index = 1 - op_index; | |
92 | if (! meta_turns[ip_index].handled[other_index] | |
93 | && meta_turns[ip_index].turn->operations[other_index].operation == for_operation) | |
94 | { | |
95 | meta_turns[ip_index].handled[other_index] = true; | |
96 | check_detailed(meta_turns, meta_turns[ip_index], other_index, cycle, start, for_operation, error); | |
97 | found = true; | |
98 | } | |
99 | } | |
100 | ||
101 | if (! found) | |
102 | { | |
103 | display(meta_turns[ip_index], " STOP"); | |
104 | error = true; | |
105 | #ifndef BOOST_GEOMETRY_DEBUG_ENRICH | |
106 | //std::cout << " STOP"; | |
107 | #endif | |
108 | } | |
109 | } | |
110 | } | |
111 | ||
112 | ||
113 | template <typename TurnPoints> | |
114 | inline bool check_graph(TurnPoints& turn_points, operation_type for_operation) | |
115 | { | |
116 | typedef typename boost::range_value<TurnPoints>::type turn_point_type; | |
117 | ||
118 | bool error = false; | |
119 | int index = 0; | |
120 | ||
121 | std::vector<meta_turn<turn_point_type> > meta_turns; | |
122 | for (typename boost::range_iterator<TurnPoints const>::type | |
123 | it = boost::begin(turn_points); | |
124 | it != boost::end(turn_points); | |
125 | ++it, ++index) | |
126 | { | |
127 | meta_turns.push_back(meta_turn<turn_point_type>(index, *it)); | |
128 | } | |
129 | ||
130 | int cycle = 0; | |
131 | for (typename boost::range_iterator<std::vector<meta_turn<turn_point_type> > > ::type | |
132 | it = boost::begin(meta_turns); | |
133 | it != boost::end(meta_turns); | |
134 | ++it) | |
135 | { | |
136 | if (! (it->turn->blocked() || it->turn->discarded)) | |
137 | { | |
138 | for (int i = 0 ; i < 2; i++) | |
139 | { | |
140 | if (! it->handled[i] | |
141 | && it->turn->operations[i].operation == for_operation) | |
142 | { | |
143 | #ifdef BOOST_GEOMETRY_DEBUG_ENRICH | |
144 | std::cout << "CYCLE " << cycle << std::endl; | |
145 | #endif | |
146 | it->handled[i] = true; | |
147 | check_detailed(meta_turns, *it, i, cycle++, it->index, for_operation, error); | |
148 | #ifdef BOOST_GEOMETRY_DEBUG_ENRICH | |
149 | std::cout <<" END CYCLE " << it->index << std::endl; | |
150 | #endif | |
151 | } | |
152 | } | |
153 | } | |
154 | } | |
155 | return error; | |
156 | } | |
157 | ||
158 | ||
159 | ||
160 | }} // namespace detail::overlay | |
161 | #endif //DOXYGEN_NO_DETAIL | |
162 | ||
163 | ||
164 | ||
165 | }} // namespace boost::geometry | |
166 | ||
167 | ||
168 | #endif // BOOST_GEOMETRY_ALGORITHMS_DETAIL_OVERLAY_CHECK_ENRICH_HPP |