1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
|
// Boost.Geometry (aka GGL, Generic Geometry Library)
// Copyright (c) 2007-2015 Barend Gehrels, Amsterdam, the Netherlands.
// This file was modified by Oracle on 2015.
// Modifications copyright (c) 2015 Oracle and/or its affiliates.
// Contributed and/or modified by Menelaos Karavelas, on behalf of Oracle
// 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_SYM_DIFFERENCE_HPP
#define BOOST_GEOMETRY_ALGORITHMS_SYM_DIFFERENCE_HPP
#include <algorithm>
#include <iterator>
#include <vector>
#include <boost/geometry/algorithms/intersection.hpp>
#include <boost/geometry/algorithms/union.hpp>
#include <boost/geometry/geometries/multi_polygon.hpp>
namespace boost { namespace geometry
{
#ifndef DOXYGEN_NO_DETAIL
namespace detail { namespace sym_difference
{
template <typename GeometryOut>
struct compute_difference
{
template
<
typename Geometry1,
typename Geometry2,
typename RobustPolicy,
typename OutputIterator,
typename Strategy
>
static inline OutputIterator apply(Geometry1 const& geometry1,
Geometry2 const& geometry2,
RobustPolicy const& robust_policy,
OutputIterator out,
Strategy const& strategy)
{
return geometry::dispatch::intersection_insert
<
Geometry1,
Geometry2,
GeometryOut,
overlay_difference,
geometry::detail::overlay::do_reverse
<
geometry::point_order<Geometry1>::value
>::value,
geometry::detail::overlay::do_reverse
<
geometry::point_order<Geometry2>::value, true
>::value
>::apply(geometry1, geometry2, robust_policy, out, strategy);
}
};
template <typename GeometryOut, typename Geometry1, typename Geometry2>
struct sym_difference_generic
{
template
<
typename RobustPolicy,
typename OutputIterator,
typename Strategy
>
static inline OutputIterator apply(Geometry1 const& geometry1,
Geometry2 const& geometry2,
RobustPolicy const& robust_policy,
OutputIterator out,
Strategy const& strategy)
{
out = compute_difference
<
GeometryOut
>::apply(geometry1, geometry2, robust_policy, out, strategy);
return compute_difference
<
GeometryOut
>::apply(geometry2, geometry1, robust_policy, out, strategy);
}
};
template <typename GeometryOut, typename Areal1, typename Areal2>
struct sym_difference_areal_areal
{
template
<
typename RobustPolicy,
typename OutputIterator,
typename Strategy
>
static inline OutputIterator apply(Areal1 const& areal1,
Areal2 const& areal2,
RobustPolicy const& robust_policy,
OutputIterator out,
Strategy const& strategy)
{
typedef geometry::model::multi_polygon
<
GeometryOut
> helper_geometry_type;
helper_geometry_type diff12, diff21;
std::back_insert_iterator<helper_geometry_type> oit12(diff12);
std::back_insert_iterator<helper_geometry_type> oit21(diff21);
compute_difference
<
GeometryOut
>::apply(areal1, areal2, robust_policy, oit12, strategy);
compute_difference
<
GeometryOut
>::apply(areal2, areal1, robust_policy, oit21, strategy);
return geometry::dispatch::union_insert
<
helper_geometry_type,
helper_geometry_type,
GeometryOut
>::apply(diff12, diff21, robust_policy, out, strategy);
}
};
}} // namespace detail::sym_difference
#endif // DOXYGEN_NO_DETAIL
#ifndef DOXYGEN_NO_DISPATCH
namespace dispatch
{
template
<
typename Geometry1,
typename Geometry2,
typename GeometryOut,
typename TagIn1 = typename geometry::tag_cast
<
typename tag<Geometry1>::type, areal_tag
>::type,
typename TagIn2 = typename geometry::tag_cast
<
typename tag<Geometry2>::type, areal_tag
>::type,
typename TagOut = typename geometry::tag<GeometryOut>::type
>
struct sym_difference_insert
: detail::sym_difference::sym_difference_generic
<
GeometryOut, Geometry1, Geometry2
>
{};
template
<
typename Areal1,
typename Areal2,
typename GeometryOut,
typename TagOut
>
struct sym_difference_insert
<
Areal1, Areal2, GeometryOut,
areal_tag, areal_tag, TagOut
> : detail::sym_difference::sym_difference_areal_areal
<
GeometryOut, Areal1, Areal2
>
{};
} // namespace dispatch
#endif // DOXYGEN_NO_DISPATCH
#ifndef DOXYGEN_NO_DETAIL
namespace detail { namespace sym_difference
{
/*!
\brief \brief_calc2{symmetric difference} \brief_strategy
\ingroup sym_difference
\details \details_calc2{symmetric difference, spatial set theoretic symmetric difference (XOR)}
\brief_strategy. \details_insert{sym_difference}
\tparam GeometryOut output geometry type, must be specified
\tparam Geometry1 \tparam_geometry
\tparam Geometry2 \tparam_geometry
\tparam Strategy \tparam_strategy_overlay
\param geometry1 \param_geometry
\param geometry2 \param_geometry
\param out \param_out{difference}
\param strategy \param_strategy{difference}
\return \return_out
\qbk{distinguish,with strategy}
*/
template
<
typename GeometryOut,
typename Geometry1,
typename Geometry2,
typename RobustPolicy,
typename OutputIterator,
typename Strategy
>
inline OutputIterator sym_difference_insert(Geometry1 const& geometry1,
Geometry2 const& geometry2,
RobustPolicy const& robust_policy,
OutputIterator out,
Strategy const& strategy)
{
concept::check<Geometry1 const>();
concept::check<Geometry2 const>();
concept::check<GeometryOut>();
return dispatch::sym_difference_insert
<
Geometry1, Geometry2, GeometryOut
>::apply(geometry1, geometry2, robust_policy, out, strategy);
}
/*!
\brief \brief_calc2{symmetric difference}
\ingroup sym_difference
\details \details_calc2{symmetric difference, spatial set theoretic symmetric difference (XOR)}
\details_insert{sym_difference}
\tparam GeometryOut output geometry type, must be specified
\tparam Geometry1 \tparam_geometry
\tparam Geometry2 \tparam_geometry
\param geometry1 \param_geometry
\param geometry2 \param_geometry
\param out \param_out{difference}
\return \return_out
*/
template
<
typename GeometryOut,
typename Geometry1,
typename Geometry2,
typename RobustPolicy,
typename OutputIterator
>
inline OutputIterator sym_difference_insert(Geometry1 const& geometry1,
Geometry2 const& geometry2,
RobustPolicy const& robust_policy, OutputIterator out)
{
concept::check<Geometry1 const>();
concept::check<Geometry2 const>();
concept::check<GeometryOut>();
typedef strategy_intersection
<
typename cs_tag<GeometryOut>::type,
Geometry1,
Geometry2,
typename geometry::point_type<GeometryOut>::type,
RobustPolicy
> strategy_type;
return sym_difference_insert<GeometryOut>(geometry1, geometry2, robust_policy, out, strategy_type());
}
}} // namespace detail::sym_difference
#endif // DOXYGEN_NO_DETAIL
/*!
\brief \brief_calc2{symmetric difference}
\ingroup sym_difference
\details \details_calc2{symmetric difference, spatial set theoretic symmetric difference (XOR)}.
\tparam Geometry1 \tparam_geometry
\tparam Geometry2 \tparam_geometry
\tparam Collection output collection, either a multi-geometry,
or a std::vector<Geometry> / std::deque<Geometry> etc
\param geometry1 \param_geometry
\param geometry2 \param_geometry
\param output_collection the output collection
\qbk{[include reference/algorithms/sym_difference.qbk]}
*/
template
<
typename Geometry1,
typename Geometry2,
typename Collection
>
inline void sym_difference(Geometry1 const& geometry1,
Geometry2 const& geometry2, Collection& output_collection)
{
concept::check<Geometry1 const>();
concept::check<Geometry2 const>();
typedef typename boost::range_value<Collection>::type geometry_out;
concept::check<geometry_out>();
typedef typename geometry::rescale_overlay_policy_type
<
Geometry1,
Geometry2
>::type rescale_policy_type;
rescale_policy_type robust_policy
= geometry::get_rescale_policy<rescale_policy_type>(geometry1, geometry2);
detail::sym_difference::sym_difference_insert<geometry_out>(
geometry1, geometry2, robust_policy,
std::back_inserter(output_collection));
}
}} // namespace boost::geometry
#endif // BOOST_GEOMETRY_ALGORITHMS_SYM_DIFFERENCE_HPP
|
