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
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
|
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=US-ASCII">
<title>buffer (with strategies)</title>
<link rel="stylesheet" href="../../../../../../../../doc/src/boostbook.css" type="text/css">
<meta name="generator" content="DocBook XSL Stylesheets V1.78.1">
<link rel="home" href="../../../../index.html" title="Chapter 1. Geometry">
<link rel="up" href="../buffer.html" title="buffer">
<link rel="prev" href="buffer_4.html" title="buffer">
<link rel="next" href="return_buffer.html" title="return_buffer">
</head>
<body bgcolor="white" text="black" link="#0000FF" vlink="#840084" alink="#0000FF">
<table cellpadding="2" width="100%"><tr>
<td valign="top"><img alt="Boost C++ Libraries" width="277" height="86" src="../../../../../../../../boost.png"></td>
<td align="center"><a href="../../../../../../../../index.html">Home</a></td>
<td align="center"><a href="../../../../../../../../libs/libraries.htm">Libraries</a></td>
<td align="center"><a href="http://www.boost.org/users/people.html">People</a></td>
<td align="center"><a href="http://www.boost.org/users/faq.html">FAQ</a></td>
<td align="center"><a href="../../../../../../../../more/index.htm">More</a></td>
</tr></table>
<hr>
<div class="spirit-nav">
<a accesskey="p" href="buffer_4.html"><img src="../../../../../../../../doc/src/images/prev.png" alt="Prev"></a><a accesskey="u" href="../buffer.html"><img src="../../../../../../../../doc/src/images/up.png" alt="Up"></a><a accesskey="h" href="../../../../index.html"><img src="../../../../../../../../doc/src/images/home.png" alt="Home"></a><a accesskey="n" href="return_buffer.html"><img src="../../../../../../../../doc/src/images/next.png" alt="Next"></a>
</div>
<div class="section">
<div class="titlepage"><div><div><h5 class="title">
<a name="geometry.reference.algorithms.buffer.buffer_7_with_strategies"></a><a class="link" href="buffer_7_with_strategies.html" title="buffer (with strategies)">buffer
(with strategies)</a>
</h5></div></div></div>
<p>
<a class="indexterm" name="idp107658784"></a>
Calculates the buffer of a geometry.
</p>
<h6>
<a name="geometry.reference.algorithms.buffer.buffer_7_with_strategies.h0"></a>
<span class="phrase"><a name="geometry.reference.algorithms.buffer.buffer_7_with_strategies.description"></a></span><a class="link" href="buffer_7_with_strategies.html#geometry.reference.algorithms.buffer.buffer_7_with_strategies.description">Description</a>
</h6>
<p>
The free function buffer calculates the buffer (a polygon being the spatial
point set collection within a specified maximum distance from a geometry)
of a geometry.
</p>
<h6>
<a name="geometry.reference.algorithms.buffer.buffer_7_with_strategies.h1"></a>
<span class="phrase"><a name="geometry.reference.algorithms.buffer.buffer_7_with_strategies.synopsis"></a></span><a class="link" href="buffer_7_with_strategies.html#geometry.reference.algorithms.buffer.buffer_7_with_strategies.synopsis">Synopsis</a>
</h6>
<p>
</p>
<pre class="programlisting"><span class="keyword">template</span><span class="special"><</span><span class="keyword">typename</span> <span class="identifier">GeometryIn</span><span class="special">,</span> <span class="keyword">typename</span> <span class="identifier">MultiPolygon</span><span class="special">,</span> <span class="keyword">typename</span> <span class="identifier">DistanceStrategy</span><span class="special">,</span> <span class="keyword">typename</span> <span class="identifier">SideStrategy</span><span class="special">,</span>
<span class="keyword">typename</span> <span class="identifier">JoinStrategy</span><span class="special">,</span> <span class="keyword">typename</span> <span class="identifier">EndStrategy</span><span class="special">,</span> <span class="keyword">typename</span> <span class="identifier">PointStrategy</span><span class="special">></span>
<span class="keyword">void</span> <span class="identifier">buffer</span><span class="special">(</span><span class="identifier">GeometryIn</span> <span class="keyword">const</span> <span class="special">&</span> <span class="identifier">geometry_in</span><span class="special">,</span> <span class="identifier">MultiPolygon</span> <span class="special">&</span> <span class="identifier">geometry_out</span><span class="special">,</span> <span class="identifier">DistanceStrategy</span> <span class="keyword">const</span> <span class="special">&</span> <span class="identifier">distance_strategy</span><span class="special">,</span>
<span class="identifier">SideStrategy</span> <span class="keyword">const</span> <span class="special">&</span> <span class="identifier">side_strategy</span><span class="special">,</span> <span class="identifier">JoinStrategy</span> <span class="keyword">const</span> <span class="special">&</span> <span class="identifier">join_strategy</span><span class="special">,</span> <span class="identifier">EndStrategy</span> <span class="keyword">const</span> <span class="special">&</span> <span class="identifier">end_strategy</span><span class="special">,</span>
<span class="identifier">PointStrategy</span> <span class="keyword">const</span> <span class="special">&</span> <span class="identifier">point_strategy</span><span class="special">)</span></pre>
<p>
</p>
<h6>
<a name="geometry.reference.algorithms.buffer.buffer_7_with_strategies.h2"></a>
<span class="phrase"><a name="geometry.reference.algorithms.buffer.buffer_7_with_strategies.parameters"></a></span><a class="link" href="buffer_7_with_strategies.html#geometry.reference.algorithms.buffer.buffer_7_with_strategies.parameters">Parameters</a>
</h6>
<div class="informaltable"><table class="table">
<colgroup>
<col>
<col>
<col>
<col>
</colgroup>
<thead><tr>
<th>
<p>
Type
</p>
</th>
<th>
<p>
Concept
</p>
</th>
<th>
<p>
Name
</p>
</th>
<th>
<p>
Description
</p>
</th>
</tr></thead>
<tbody>
<tr>
<td>
<p>
GeometryIn const &
</p>
</td>
<td>
<p>
Any type fulfilling a Geometry Concept
</p>
</td>
<td>
<p>
geometry_in
</p>
</td>
<td>
<p>
A model of the specified concept
</p>
</td>
</tr>
<tr>
<td>
<p>
MultiPolygon &
</p>
</td>
<td>
<p>
A type fulfilling the MultiPolygon Concept
</p>
</td>
<td>
<p>
geometry_out
</p>
</td>
<td>
<p>
output multi polygon (or std:: collection of polygons), will
contain a buffered version of the input geometry
</p>
</td>
</tr>
<tr>
<td>
<p>
DistanceStrategy const &
</p>
</td>
<td>
<p>
A strategy defining distance (or radius)
</p>
</td>
<td>
<p>
distance_strategy
</p>
</td>
<td>
<p>
The distance strategy to be used
</p>
</td>
</tr>
<tr>
<td>
<p>
SideStrategy const &
</p>
</td>
<td>
<p>
A strategy defining creation along sides
</p>
</td>
<td>
<p>
side_strategy
</p>
</td>
<td>
<p>
The side strategy to be used
</p>
</td>
</tr>
<tr>
<td>
<p>
JoinStrategy const &
</p>
</td>
<td>
<p>
A strategy defining creation around convex corners
</p>
</td>
<td>
<p>
join_strategy
</p>
</td>
<td>
<p>
The join strategy to be used
</p>
</td>
</tr>
<tr>
<td>
<p>
EndStrategy const &
</p>
</td>
<td>
<p>
A strategy defining creation at linestring ends
</p>
</td>
<td>
<p>
end_strategy
</p>
</td>
<td>
<p>
The end strategy to be used
</p>
</td>
</tr>
<tr>
<td>
<p>
PointStrategy const &
</p>
</td>
<td>
<p>
A strategy defining creation around points
</p>
</td>
<td>
<p>
point_strategy
</p>
</td>
<td>
<p>
The point strategy to be used
</p>
</td>
</tr>
</tbody>
</table></div>
<h6>
<a name="geometry.reference.algorithms.buffer.buffer_7_with_strategies.h3"></a>
<span class="phrase"><a name="geometry.reference.algorithms.buffer.buffer_7_with_strategies.header"></a></span><a class="link" href="buffer_7_with_strategies.html#geometry.reference.algorithms.buffer.buffer_7_with_strategies.header">Header</a>
</h6>
<p>
Either
</p>
<p>
<code class="computeroutput"><span class="preprocessor">#include</span> <span class="special"><</span><span class="identifier">boost</span><span class="special">/</span><span class="identifier">geometry</span><span class="special">.</span><span class="identifier">hpp</span><span class="special">></span></code>
</p>
<p>
Or
</p>
<p>
<code class="computeroutput"><span class="preprocessor">#include</span> <span class="special"><</span><span class="identifier">boost</span><span class="special">/</span><span class="identifier">geometry</span><span class="special">/</span><span class="identifier">algorithms</span><span class="special">/</span><span class="identifier">buffer</span><span class="special">.</span><span class="identifier">hpp</span><span class="special">></span></code>
</p>
<h6>
<a name="geometry.reference.algorithms.buffer.buffer_7_with_strategies.h4"></a>
<span class="phrase"><a name="geometry.reference.algorithms.buffer.buffer_7_with_strategies.strategies"></a></span><a class="link" href="buffer_7_with_strategies.html#geometry.reference.algorithms.buffer.buffer_7_with_strategies.strategies">Strategies</a>
</h6>
<p>
The 5 strategies give the user control to the generated buffer
</p>
<div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: disc; ">
<li class="listitem">
convex corners can be rounded or sharp
</li>
<li class="listitem">
line-ends can be rounded or flat
</li>
<li class="listitem">
distance can be symmetric or assymetric, and can be specified as
negative (deflate)
</li>
<li class="listitem">
around points the shape can be circular or square
</li>
<li class="listitem">
the sides can be controlled (currently there is only one option provided)
</li>
</ul></div>
<p>
The next figure shows where in the generated buffer the strategies have
effect
</p>
<p>
<span class="inlinemediaobject"><img src="../../../../img/algorithms/buffer_strategies.png" alt="buffer_strategies"></span>
</p>
<h6>
<a name="geometry.reference.algorithms.buffer.buffer_7_with_strategies.h5"></a>
<span class="phrase"><a name="geometry.reference.algorithms.buffer.buffer_7_with_strategies.conformance"></a></span><a class="link" href="buffer_7_with_strategies.html#geometry.reference.algorithms.buffer.buffer_7_with_strategies.conformance">Conformance</a>
</h6>
<p>
The function buffer implements function Buffer from the <a href="http://www.opengeospatial.org/standards/sfa" target="_top">OGC
Simple Feature Specification</a>.
</p>
<p>
It is conformant if used with the following combination of strategies:
<a class="link" href="../../strategies/strategy_buffer_join_round.html" title="strategy::buffer::join_round">join_round</a>,
<a class="link" href="../../strategies/strategy_buffer_end_round.html" title="strategy::buffer::end_round">end_round</a>,
<a class="link" href="../../strategies/strategy_buffer_distance_symmetric.html" title="strategy::buffer::distance_symmetric">distance_symmetric</a>,
<a class="link" href="../../strategies/strategy_buffer_point_circle.html" title="strategy::buffer::point_circle">point_circle</a>,
side_straight
</p>
<h6>
<a name="geometry.reference.algorithms.buffer.buffer_7_with_strategies.h6"></a>
<span class="phrase"><a name="geometry.reference.algorithms.buffer.buffer_7_with_strategies.supported_geometries"></a></span><a class="link" href="buffer_7_with_strategies.html#geometry.reference.algorithms.buffer.buffer_7_with_strategies.supported_geometries">Supported
geometries</a>
</h6>
<div class="informaltable"><table class="table">
<colgroup>
<col>
<col>
</colgroup>
<thead><tr>
<th>
</th>
<th>
<p>
2D Cartesian
</p>
</th>
</tr></thead>
<tbody>
<tr>
<td>
<p>
Point
</p>
</td>
<td>
<p>
<span class="inlinemediaobject"><img src="../../../../img/ok.png" alt="ok"></span>
</p>
</td>
</tr>
<tr>
<td>
<p>
Segment
</p>
</td>
<td>
<p>
<span class="inlinemediaobject"><img src="../../../../img/nyi.png" alt="nyi"></span>
</p>
</td>
</tr>
<tr>
<td>
<p>
Box
</p>
</td>
<td>
<p>
<span class="inlinemediaobject"><img src="../../../../img/nyi.png" alt="nyi"></span>
</p>
</td>
</tr>
<tr>
<td>
<p>
Linestring
</p>
</td>
<td>
<p>
<span class="inlinemediaobject"><img src="../../../../img/ok.png" alt="ok"></span>
</p>
</td>
</tr>
<tr>
<td>
<p>
Ring
</p>
</td>
<td>
<p>
<span class="inlinemediaobject"><img src="../../../../img/ok.png" alt="ok"></span>
</p>
</td>
</tr>
<tr>
<td>
<p>
Polygon
</p>
</td>
<td>
<p>
<span class="inlinemediaobject"><img src="../../../../img/ok.png" alt="ok"></span>
</p>
</td>
</tr>
<tr>
<td>
<p>
MultiPoint
</p>
</td>
<td>
<p>
<span class="inlinemediaobject"><img src="../../../../img/ok.png" alt="ok"></span>
</p>
</td>
</tr>
<tr>
<td>
<p>
MultiLinestring
</p>
</td>
<td>
<p>
<span class="inlinemediaobject"><img src="../../../../img/ok.png" alt="ok"></span>
</p>
</td>
</tr>
<tr>
<td>
<p>
MultiPolygon
</p>
</td>
<td>
<p>
<span class="inlinemediaobject"><img src="../../../../img/ok.png" alt="ok"></span>
</p>
</td>
</tr>
</tbody>
</table></div>
<h6>
<a name="geometry.reference.algorithms.buffer.buffer_7_with_strategies.h7"></a>
<span class="phrase"><a name="geometry.reference.algorithms.buffer.buffer_7_with_strategies.examples"></a></span><a class="link" href="buffer_7_with_strategies.html#geometry.reference.algorithms.buffer.buffer_7_with_strategies.examples">Examples</a>
</h6>
<p>
Shows how the buffer algorithm can be used to create a buffer of a linestring
</p>
<p>
</p>
<pre class="programlisting"><span class="preprocessor">#include</span> <span class="special"><</span><span class="identifier">boost</span><span class="special">/</span><span class="identifier">geometry</span><span class="special">.</span><span class="identifier">hpp</span><span class="special">></span>
<span class="preprocessor">#include</span> <span class="special"><</span><span class="identifier">boost</span><span class="special">/</span><span class="identifier">geometry</span><span class="special">/</span><span class="identifier">geometries</span><span class="special">/</span><span class="identifier">point_xy</span><span class="special">.</span><span class="identifier">hpp</span><span class="special">></span>
<span class="preprocessor">#include</span> <span class="special"><</span><span class="identifier">boost</span><span class="special">/</span><span class="identifier">geometry</span><span class="special">/</span><span class="identifier">geometries</span><span class="special">/</span><span class="identifier">geometries</span><span class="special">.</span><span class="identifier">hpp</span><span class="special">></span>
<span class="keyword">int</span> <span class="identifier">main</span><span class="special">()</span>
<span class="special">{</span>
<span class="keyword">typedef</span> <span class="keyword">double</span> <span class="identifier">coordinate_type</span><span class="special">;</span>
<span class="keyword">typedef</span> <span class="identifier">boost</span><span class="special">::</span><span class="identifier">geometry</span><span class="special">::</span><span class="identifier">model</span><span class="special">::</span><span class="identifier">d2</span><span class="special">::</span><span class="identifier">point_xy</span><span class="special"><</span><span class="identifier">coordinate_type</span><span class="special">></span> <span class="identifier">point</span><span class="special">;</span>
<span class="keyword">typedef</span> <span class="identifier">boost</span><span class="special">::</span><span class="identifier">geometry</span><span class="special">::</span><span class="identifier">model</span><span class="special">::</span><span class="identifier">polygon</span><span class="special"><</span><span class="identifier">point</span><span class="special">></span> <span class="identifier">polygon</span><span class="special">;</span>
<span class="comment">// Declare strategies</span>
<span class="keyword">const</span> <span class="keyword">double</span> <span class="identifier">buffer_distance</span> <span class="special">=</span> <span class="number">1.0</span><span class="special">;</span>
<span class="keyword">const</span> <span class="keyword">int</span> <span class="identifier">points_per_circle</span> <span class="special">=</span> <span class="number">36</span><span class="special">;</span>
<span class="identifier">boost</span><span class="special">::</span><span class="identifier">geometry</span><span class="special">::</span><span class="identifier">strategy</span><span class="special">::</span><span class="identifier">buffer</span><span class="special">::</span><span class="identifier">distance_symmetric</span><span class="special"><</span><span class="identifier">coordinate_type</span><span class="special">></span> <span class="identifier">distance_strategy</span><span class="special">(</span><span class="identifier">buffer_distance</span><span class="special">);</span>
<span class="identifier">boost</span><span class="special">::</span><span class="identifier">geometry</span><span class="special">::</span><span class="identifier">strategy</span><span class="special">::</span><span class="identifier">buffer</span><span class="special">::</span><span class="identifier">join_round</span> <span class="identifier">join_strategy</span><span class="special">(</span><span class="identifier">points_per_circle</span><span class="special">);</span>
<span class="identifier">boost</span><span class="special">::</span><span class="identifier">geometry</span><span class="special">::</span><span class="identifier">strategy</span><span class="special">::</span><span class="identifier">buffer</span><span class="special">::</span><span class="identifier">end_round</span> <span class="identifier">end_strategy</span><span class="special">(</span><span class="identifier">points_per_circle</span><span class="special">);</span>
<span class="identifier">boost</span><span class="special">::</span><span class="identifier">geometry</span><span class="special">::</span><span class="identifier">strategy</span><span class="special">::</span><span class="identifier">buffer</span><span class="special">::</span><span class="identifier">point_circle</span> <span class="identifier">circle_strategy</span><span class="special">(</span><span class="identifier">points_per_circle</span><span class="special">);</span>
<span class="identifier">boost</span><span class="special">::</span><span class="identifier">geometry</span><span class="special">::</span><span class="identifier">strategy</span><span class="special">::</span><span class="identifier">buffer</span><span class="special">::</span><span class="identifier">side_straight</span> <span class="identifier">side_strategy</span><span class="special">;</span>
<span class="comment">// Declare output</span>
<span class="identifier">boost</span><span class="special">::</span><span class="identifier">geometry</span><span class="special">::</span><span class="identifier">model</span><span class="special">::</span><span class="identifier">multi_polygon</span><span class="special"><</span><span class="identifier">polygon</span><span class="special">></span> <span class="identifier">result</span><span class="special">;</span>
<span class="comment">// Declare/fill a linestring</span>
<span class="identifier">boost</span><span class="special">::</span><span class="identifier">geometry</span><span class="special">::</span><span class="identifier">model</span><span class="special">::</span><span class="identifier">linestring</span><span class="special"><</span><span class="identifier">point</span><span class="special">></span> <span class="identifier">ls</span><span class="special">;</span>
<span class="identifier">boost</span><span class="special">::</span><span class="identifier">geometry</span><span class="special">::</span><span class="identifier">read_wkt</span><span class="special">(</span><span class="string">"LINESTRING(0 0,4 5,7 4,10 6)"</span><span class="special">,</span> <span class="identifier">ls</span><span class="special">);</span>
<span class="comment">// Create the buffer of a linestring</span>
<span class="identifier">boost</span><span class="special">::</span><span class="identifier">geometry</span><span class="special">::</span><span class="identifier">buffer</span><span class="special">(</span><span class="identifier">ls</span><span class="special">,</span> <span class="identifier">result</span><span class="special">,</span>
<span class="identifier">distance_strategy</span><span class="special">,</span> <span class="identifier">side_strategy</span><span class="special">,</span>
<span class="identifier">join_strategy</span><span class="special">,</span> <span class="identifier">end_strategy</span><span class="special">,</span> <span class="identifier">circle_strategy</span><span class="special">);</span>
<span class="comment">// Declare/fill a multi point</span>
<span class="identifier">boost</span><span class="special">::</span><span class="identifier">geometry</span><span class="special">::</span><span class="identifier">model</span><span class="special">::</span><span class="identifier">multi_point</span><span class="special"><</span><span class="identifier">point</span><span class="special">></span> <span class="identifier">mp</span><span class="special">;</span>
<span class="identifier">boost</span><span class="special">::</span><span class="identifier">geometry</span><span class="special">::</span><span class="identifier">read_wkt</span><span class="special">(</span><span class="string">"MULTIPOINT((3 3),(4 4),(6 2))"</span><span class="special">,</span> <span class="identifier">mp</span><span class="special">);</span>
<span class="comment">// Create the buffer of a multi point</span>
<span class="identifier">boost</span><span class="special">::</span><span class="identifier">geometry</span><span class="special">::</span><span class="identifier">buffer</span><span class="special">(</span><span class="identifier">mp</span><span class="special">,</span> <span class="identifier">result</span><span class="special">,</span>
<span class="identifier">distance_strategy</span><span class="special">,</span> <span class="identifier">side_strategy</span><span class="special">,</span>
<span class="identifier">join_strategy</span><span class="special">,</span> <span class="identifier">end_strategy</span><span class="special">,</span> <span class="identifier">circle_strategy</span><span class="special">);</span>
<span class="comment">// Declare/fill a multi_polygon</span>
<span class="identifier">boost</span><span class="special">::</span><span class="identifier">geometry</span><span class="special">::</span><span class="identifier">model</span><span class="special">::</span><span class="identifier">multi_polygon</span><span class="special"><</span><span class="identifier">polygon</span><span class="special">></span> <span class="identifier">mpol</span><span class="special">;</span>
<span class="identifier">boost</span><span class="special">::</span><span class="identifier">geometry</span><span class="special">::</span><span class="identifier">read_wkt</span><span class="special">(</span><span class="string">"MULTIPOLYGON(((0 1,2 5,5 3,0 1)),((1 1,5 2,5 0,1 1)))"</span><span class="special">,</span> <span class="identifier">mpol</span><span class="special">);</span>
<span class="comment">// Create the buffer of a multi polygon</span>
<span class="identifier">boost</span><span class="special">::</span><span class="identifier">geometry</span><span class="special">::</span><span class="identifier">buffer</span><span class="special">(</span><span class="identifier">mpol</span><span class="special">,</span> <span class="identifier">result</span><span class="special">,</span>
<span class="identifier">distance_strategy</span><span class="special">,</span> <span class="identifier">side_strategy</span><span class="special">,</span>
<span class="identifier">join_strategy</span><span class="special">,</span> <span class="identifier">end_strategy</span><span class="special">,</span> <span class="identifier">circle_strategy</span><span class="special">);</span>
<span class="keyword">return</span> <span class="number">0</span><span class="special">;</span>
<span class="special">}</span>
</pre>
<p>
</p>
<h6>
<a name="geometry.reference.algorithms.buffer.buffer_7_with_strategies.h8"></a>
<span class="phrase"><a name="geometry.reference.algorithms.buffer.buffer_7_with_strategies.the_linestring_case"></a></span><a class="link" href="buffer_7_with_strategies.html#geometry.reference.algorithms.buffer.buffer_7_with_strategies.the_linestring_case">The
linestring case</a>
</h6>
<p>
<span class="inlinemediaobject"><img src="../../../../img/algorithms/buffer_linestring.png" alt="buffer_linestring"></span>
</p>
<h6>
<a name="geometry.reference.algorithms.buffer.buffer_7_with_strategies.h9"></a>
<span class="phrase"><a name="geometry.reference.algorithms.buffer.buffer_7_with_strategies.the_multi_point_case"></a></span><a class="link" href="buffer_7_with_strategies.html#geometry.reference.algorithms.buffer.buffer_7_with_strategies.the_multi_point_case">The
multi_point case</a>
</h6>
<p>
<span class="inlinemediaobject"><img src="../../../../img/algorithms/buffer_multi_point.png" alt="buffer_multi_point"></span>
</p>
<h6>
<a name="geometry.reference.algorithms.buffer.buffer_7_with_strategies.h10"></a>
<span class="phrase"><a name="geometry.reference.algorithms.buffer.buffer_7_with_strategies.the_multi_polygon_case"></a></span><a class="link" href="buffer_7_with_strategies.html#geometry.reference.algorithms.buffer.buffer_7_with_strategies.the_multi_polygon_case">The
multi_polygon case</a>
</h6>
<p>
<span class="inlinemediaobject"><img src="../../../../img/algorithms/buffer_multi_polygon.png" alt="buffer_multi_polygon"></span>
</p>
<h6>
<a name="geometry.reference.algorithms.buffer.buffer_7_with_strategies.h11"></a>
<span class="phrase"><a name="geometry.reference.algorithms.buffer.buffer_7_with_strategies.available_strategies"></a></span><a class="link" href="buffer_7_with_strategies.html#geometry.reference.algorithms.buffer.buffer_7_with_strategies.available_strategies">Available
Strategies</a>
</h6>
<div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: disc; ">
<li class="listitem">
JoinStrategy: <a class="link" href="../../strategies/strategy_buffer_join_round.html" title="strategy::buffer::join_round">join_round
(cartesian)</a>
</li>
<li class="listitem">
JoinStrategy: <a class="link" href="../../strategies/strategy_buffer_join_miter.html" title="strategy::buffer::join_miter">join_miter
(cartesian)</a>
</li>
<li class="listitem">
EndStrategy: <a class="link" href="../../strategies/strategy_buffer_end_round.html" title="strategy::buffer::end_round">end_round
(cartesian)</a>
</li>
<li class="listitem">
EndStrategy: <a class="link" href="../../strategies/strategy_buffer_end_flat.html" title="strategy::buffer::end_flat">end_flat
(cartesian)</a>
</li>
<li class="listitem">
DistanceStrategy: <a class="link" href="../../strategies/strategy_buffer_distance_symmetric.html" title="strategy::buffer::distance_symmetric">distance_symmetric</a>
</li>
<li class="listitem">
DistanceStrategy: <a class="link" href="../../strategies/strategy_buffer_distance_asymmetric.html" title="strategy::buffer::distance_asymmetric">distance_asymmetric</a>
</li>
<li class="listitem">
PointStrategy: <a class="link" href="../../strategies/strategy_buffer_point_circle.html" title="strategy::buffer::point_circle">point_circle
(cartesian)</a>
</li>
<li class="listitem">
PointStrategy: <a class="link" href="../../strategies/strategy_buffer_point_square.html" title="strategy::buffer::point_square">point_square
(cartesian)</a>
</li>
<li class="listitem">
SideStrategy: <a class="link" href="../../strategies/strategy_buffer_side_straight.html" title="strategy::buffer::side_straight">side_straight
(cartesian)</a>
</li>
</ul></div>
</div>
<table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr>
<td align="left"></td>
<td align="right"><div class="copyright-footer">Copyright © 2009-2015 Barend Gehrels, Bruno Lalande,
Mateusz Loskot, Adam Wulkiewicz, Oracle and/or its affiliates<p>
Distributed under the Boost Software License, Version 1.0. (See accompanying
file LICENSE_1_0.txt or copy at <a href="http://www.boost.org/LICENSE_1_0.txt" target="_top">http://www.boost.org/LICENSE_1_0.txt</a>)
</p>
</div></td>
</tr></table>
<hr>
<div class="spirit-nav">
<a accesskey="p" href="buffer_4.html"><img src="../../../../../../../../doc/src/images/prev.png" alt="Prev"></a><a accesskey="u" href="../buffer.html"><img src="../../../../../../../../doc/src/images/up.png" alt="Up"></a><a accesskey="h" href="../../../../index.html"><img src="../../../../../../../../doc/src/images/home.png" alt="Home"></a><a accesskey="n" href="return_buffer.html"><img src="../../../../../../../../doc/src/images/next.png" alt="Next"></a>
</div>
</body>
</html>
|
