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
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
|
// Boost.Geometry (aka GGL, Generic Geometry Library)
// Copyright (c) 2007-2012 Barend Gehrels, Amsterdam, the Netherlands.
// 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_COPY_SEGMENT_POINT_HPP
#define BOOST_GEOMETRY_ALGORITHMS_DETAIL_OVERLAY_COPY_SEGMENT_POINT_HPP
#include <boost/array.hpp>
#include <boost/assert.hpp>
#include <boost/mpl/assert.hpp>
#include <boost/range.hpp>
#include <boost/geometry/core/ring_type.hpp>
#include <boost/geometry/core/exterior_ring.hpp>
#include <boost/geometry/core/interior_rings.hpp>
#include <boost/geometry/core/tags.hpp>
#include <boost/geometry/algorithms/convert.hpp>
#include <boost/geometry/geometries/concepts/check.hpp>
#include <boost/geometry/util/range.hpp>
#include <boost/geometry/views/detail/normalized_view.hpp>
namespace boost { namespace geometry
{
#ifndef DOXYGEN_NO_DETAIL
namespace detail { namespace copy_segments
{
template <typename Range, bool Reverse, typename SegmentIdentifier, typename PointOut>
struct copy_segment_point_range
{
static inline bool apply(Range const& range,
SegmentIdentifier const& seg_id, bool second,
PointOut& point)
{
detail::normalized_view<Range const> view(range);
signed_index_type const n = boost::size(view);
signed_index_type index = seg_id.segment_index;
if (second)
{
index++;
if (index >= n)
{
index = 0;
}
}
BOOST_ASSERT(index >= 0 && index < n);
geometry::convert(*(boost::begin(view) + index), point);
return true;
}
};
template <typename Polygon, bool Reverse, typename SegmentIdentifier, typename PointOut>
struct copy_segment_point_polygon
{
static inline bool apply(Polygon const& polygon,
SegmentIdentifier const& seg_id, bool second,
PointOut& point)
{
// Call ring-version with the right ring
return copy_segment_point_range
<
typename geometry::ring_type<Polygon>::type,
Reverse,
SegmentIdentifier,
PointOut
>::apply
(
seg_id.ring_index < 0
? geometry::exterior_ring(polygon)
: range::at(geometry::interior_rings(polygon), seg_id.ring_index),
seg_id, second,
point
);
}
};
template <typename Box, bool Reverse, typename SegmentIdentifier, typename PointOut>
struct copy_segment_point_box
{
static inline bool apply(Box const& box,
SegmentIdentifier const& seg_id, bool second,
PointOut& point)
{
signed_index_type index = seg_id.segment_index;
if (second)
{
index++;
}
boost::array<typename point_type<Box>::type, 4> bp;
assign_box_corners_oriented<Reverse>(box, bp);
point = bp[index % 4];
return true;
}
};
template
<
typename MultiGeometry,
typename SegmentIdentifier,
typename PointOut,
typename Policy
>
struct copy_segment_point_multi
{
static inline bool apply(MultiGeometry const& multi,
SegmentIdentifier const& seg_id, bool second,
PointOut& point)
{
BOOST_ASSERT
(
seg_id.multi_index >= 0
&& seg_id.multi_index < int(boost::size(multi))
);
// Call the single-version
return Policy::apply(range::at(multi, seg_id.multi_index), seg_id, second, point);
}
};
}} // namespace detail::copy_segments
#endif // DOXYGEN_NO_DETAIL
#ifndef DOXYGEN_NO_DISPATCH
namespace dispatch
{
template
<
typename Tag,
typename GeometryIn,
bool Reverse,
typename SegmentIdentifier,
typename PointOut
>
struct copy_segment_point
{
BOOST_MPL_ASSERT_MSG
(
false, NOT_OR_NOT_YET_IMPLEMENTED_FOR_THIS_GEOMETRY_TYPE
, (types<GeometryIn>)
);
};
template <typename LineString, bool Reverse, typename SegmentIdentifier, typename PointOut>
struct copy_segment_point<linestring_tag, LineString, Reverse, SegmentIdentifier, PointOut>
: detail::copy_segments::copy_segment_point_range
<
LineString, Reverse, SegmentIdentifier, PointOut
>
{};
template <typename Ring, bool Reverse, typename SegmentIdentifier, typename PointOut>
struct copy_segment_point<ring_tag, Ring, Reverse, SegmentIdentifier, PointOut>
: detail::copy_segments::copy_segment_point_range
<
Ring, Reverse, SegmentIdentifier, PointOut
>
{};
template <typename Polygon, bool Reverse, typename SegmentIdentifier, typename PointOut>
struct copy_segment_point<polygon_tag, Polygon, Reverse, SegmentIdentifier, PointOut>
: detail::copy_segments::copy_segment_point_polygon
<
Polygon, Reverse, SegmentIdentifier, PointOut
>
{};
template <typename Box, bool Reverse, typename SegmentIdentifier, typename PointOut>
struct copy_segment_point<box_tag, Box, Reverse, SegmentIdentifier, PointOut>
: detail::copy_segments::copy_segment_point_box
<
Box, Reverse, SegmentIdentifier, PointOut
>
{};
template
<
typename MultiGeometry,
bool Reverse,
typename SegmentIdentifier,
typename PointOut
>
struct copy_segment_point
<
multi_polygon_tag,
MultiGeometry,
Reverse,
SegmentIdentifier,
PointOut
>
: detail::copy_segments::copy_segment_point_multi
<
MultiGeometry,
SegmentIdentifier,
PointOut,
detail::copy_segments::copy_segment_point_polygon
<
typename boost::range_value<MultiGeometry>::type,
Reverse,
SegmentIdentifier,
PointOut
>
>
{};
template
<
typename MultiGeometry,
bool Reverse,
typename SegmentIdentifier,
typename PointOut
>
struct copy_segment_point
<
multi_linestring_tag,
MultiGeometry,
Reverse,
SegmentIdentifier,
PointOut
>
: detail::copy_segments::copy_segment_point_multi
<
MultiGeometry,
SegmentIdentifier,
PointOut,
detail::copy_segments::copy_segment_point_range
<
typename boost::range_value<MultiGeometry>::type,
Reverse,
SegmentIdentifier,
PointOut
>
>
{};
} // namespace dispatch
#endif // DOXYGEN_NO_DISPATCH
/*!
\brief Helper function, copies a point from a segment
\ingroup overlay
*/
template<bool Reverse, typename Geometry, typename SegmentIdentifier, typename PointOut>
inline bool copy_segment_point(Geometry const& geometry,
SegmentIdentifier const& seg_id, bool second,
PointOut& point_out)
{
concept::check<Geometry const>();
return dispatch::copy_segment_point
<
typename tag<Geometry>::type,
Geometry,
Reverse,
SegmentIdentifier,
PointOut
>::apply(geometry, seg_id, second, point_out);
}
/*!
\brief Helper function, to avoid the same construct several times,
copies a point, based on a source-index and two geometries
\ingroup overlay
*/
template
<
bool Reverse1, bool Reverse2,
typename Geometry1, typename Geometry2,
typename SegmentIdentifier,
typename PointOut
>
inline bool copy_segment_point(Geometry1 const& geometry1, Geometry2 const& geometry2,
SegmentIdentifier const& seg_id, bool second,
PointOut& point_out)
{
concept::check<Geometry1 const>();
concept::check<Geometry2 const>();
BOOST_ASSERT(seg_id.source_index == 0 || seg_id.source_index == 1);
if (seg_id.source_index == 0)
{
return dispatch::copy_segment_point
<
typename tag<Geometry1>::type,
Geometry1,
Reverse1,
SegmentIdentifier,
PointOut
>::apply(geometry1, seg_id, second, point_out);
}
else if (seg_id.source_index == 1)
{
return dispatch::copy_segment_point
<
typename tag<Geometry2>::type,
Geometry2,
Reverse2,
SegmentIdentifier,
PointOut
>::apply(geometry2, seg_id, second, point_out);
}
// Exception?
return false;
}
/*!
\brief Helper function, to avoid the same construct several times,
copies a point, based on a source-index and two geometries
\ingroup overlay
*/
template
<
bool Reverse1, bool Reverse2,
typename Geometry1, typename Geometry2,
typename SegmentIdentifier,
typename PointOut
>
inline bool copy_segment_points(Geometry1 const& geometry1, Geometry2 const& geometry2,
SegmentIdentifier const& seg_id,
PointOut& point1, PointOut& point2)
{
concept::check<Geometry1 const>();
concept::check<Geometry2 const>();
return copy_segment_point<Reverse1, Reverse2>(geometry1, geometry2, seg_id, false, point1)
&& copy_segment_point<Reverse1, Reverse2>(geometry1, geometry2, seg_id, true, point2);
}
}} // namespace boost::geometry
#endif // BOOST_GEOMETRY_ALGORITHMS_DETAIL_OVERLAY_COPY_SEGMENT_POINT_HPP
|
