1<html> 2<head> 3<meta http-equiv="Content-Type" content="text/html; charset=UTF-8"> 4<title>append</title> 5<link rel="stylesheet" href="../../../../../../../doc/src/boostbook.css" type="text/css"> 6<meta name="generator" content="DocBook XSL Stylesheets V1.79.1"> 7<link rel="home" href="../../../index.html" title="Chapter 1. Geometry"> 8<link rel="up" href="../algorithms.html" title="Algorithms"> 9<link rel="prev" href="assign/assign_zero.html" title="assign_zero"> 10<link rel="next" href="buffer.html" title="buffer"> 11</head> 12<body bgcolor="white" text="black" link="#0000FF" vlink="#840084" alink="#0000FF"> 13<table cellpadding="2" width="100%"><tr> 14<td valign="top"><img alt="Boost C++ Libraries" width="277" height="86" src="../../../../../../../boost.png"></td> 15<td align="center"><a href="../../../../../../../index.html">Home</a></td> 16<td align="center"><a href="../../../../../../../libs/libraries.htm">Libraries</a></td> 17<td align="center"><a href="http://www.boost.org/users/people.html">People</a></td> 18<td align="center"><a href="http://www.boost.org/users/faq.html">FAQ</a></td> 19<td align="center"><a href="../../../../../../../more/index.htm">More</a></td> 20</tr></table> 21<hr> 22<div class="spirit-nav"> 23<a accesskey="p" href="assign/assign_zero.html"><img src="../../../../../../../doc/src/images/prev.png" alt="Prev"></a><a accesskey="u" href="../algorithms.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="buffer.html"><img src="../../../../../../../doc/src/images/next.png" alt="Next"></a> 24</div> 25<div class="section"> 26<div class="titlepage"><div><div><h4 class="title"> 27<a name="geometry.reference.algorithms.append"></a><a class="link" href="append.html" title="append">append</a> 28</h4></div></div></div> 29<p> 30 <a class="indexterm" name="idm45635706672928"></a> 31Appends one or more points to a linestring, ring, polygon, multi-geometry. 32 </p> 33<h6> 34<a name="geometry.reference.algorithms.append.h0"></a> 35 <span class="phrase"><a name="geometry.reference.algorithms.append.synopsis"></a></span><a class="link" href="append.html#geometry.reference.algorithms.append.synopsis">Synopsis</a> 36 </h6> 37<p> 38</p> 39<pre class="programlisting"><span class="keyword">template</span><span class="special"><</span><span class="keyword">typename</span> <span class="identifier">Geometry</span><span class="special">,</span> <span class="keyword">typename</span> <span class="identifier">RangeOrPoint</span><span class="special">></span> 40<span class="keyword">void</span> <span class="identifier">append</span><span class="special">(</span><span class="identifier">Geometry</span> <span class="special">&</span> <span class="identifier">geometry</span><span class="special">,</span> <span class="identifier">RangeOrPoint</span> <span class="keyword">const</span> <span class="special">&</span> <span class="identifier">range_or_point</span><span class="special">,</span> <span class="keyword">int</span> <span class="identifier">ring_index</span> <span class="special">=</span> <span class="special">-</span><span class="number">1</span><span class="special">,</span> 41 <span class="keyword">int</span> <span class="identifier">multi_index</span> <span class="special">=</span> <span class="number">0</span><span class="special">)</span></pre> 42<p> 43 </p> 44<h6> 45<a name="geometry.reference.algorithms.append.h1"></a> 46 <span class="phrase"><a name="geometry.reference.algorithms.append.parameters"></a></span><a class="link" href="append.html#geometry.reference.algorithms.append.parameters">Parameters</a> 47 </h6> 48<div class="informaltable"><table class="table"> 49<colgroup> 50<col> 51<col> 52<col> 53<col> 54</colgroup> 55<thead><tr> 56<th> 57 <p> 58 Type 59 </p> 60 </th> 61<th> 62 <p> 63 Concept 64 </p> 65 </th> 66<th> 67 <p> 68 Name 69 </p> 70 </th> 71<th> 72 <p> 73 Description 74 </p> 75 </th> 76</tr></thead> 77<tbody> 78<tr> 79<td> 80 <p> 81 Geometry & 82 </p> 83 </td> 84<td> 85 <p> 86 Any type fulfilling a Geometry Concept 87 </p> 88 </td> 89<td> 90 <p> 91 geometry 92 </p> 93 </td> 94<td> 95 <p> 96 A model of the specified concept 97 </p> 98 </td> 99</tr> 100<tr> 101<td> 102 <p> 103 RangeOrPoint const & 104 </p> 105 </td> 106<td> 107 <p> 108 Either a range or a point, fullfilling Boost.Range concept or 109 Boost.Geometry Point Concept 110 </p> 111 </td> 112<td> 113 <p> 114 range_or_point 115 </p> 116 </td> 117<td> 118 <p> 119 The point or range to add 120 </p> 121 </td> 122</tr> 123<tr> 124<td> 125 <p> 126 int 127 </p> 128 </td> 129<td> 130 </td> 131<td> 132 <p> 133 ring_index 134 </p> 135 </td> 136<td> 137 <p> 138 The index of the ring in case of a polygon: exterior ring (-1, 139 the default) or interior ring index 140 </p> 141 </td> 142</tr> 143<tr> 144<td> 145 <p> 146 int 147 </p> 148 </td> 149<td> 150 </td> 151<td> 152 <p> 153 multi_index 154 </p> 155 </td> 156<td> 157 <p> 158 The index of the geometry to which the points are appended 159 </p> 160 </td> 161</tr> 162</tbody> 163</table></div> 164<h6> 165<a name="geometry.reference.algorithms.append.h2"></a> 166 <span class="phrase"><a name="geometry.reference.algorithms.append.header"></a></span><a class="link" href="append.html#geometry.reference.algorithms.append.header">Header</a> 167 </h6> 168<p> 169 Either 170 </p> 171<p> 172 <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> 173 </p> 174<p> 175 Or 176 </p> 177<p> 178 <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">append</span><span class="special">.</span><span class="identifier">hpp</span><span class="special">></span></code> 179 </p> 180<h6> 181<a name="geometry.reference.algorithms.append.h3"></a> 182 <span class="phrase"><a name="geometry.reference.algorithms.append.conformance"></a></span><a class="link" href="append.html#geometry.reference.algorithms.append.conformance">Conformance</a> 183 </h6> 184<p> 185 The function append is not defined by OGC. 186 </p> 187<h6> 188<a name="geometry.reference.algorithms.append.h4"></a> 189 <span class="phrase"><a name="geometry.reference.algorithms.append.supported_geometries"></a></span><a class="link" href="append.html#geometry.reference.algorithms.append.supported_geometries">Supported 190 geometries</a> 191 </h6> 192<div class="informaltable"><table class="table"> 193<colgroup> 194<col> 195<col> 196<col> 197</colgroup> 198<thead><tr> 199<th> 200 </th> 201<th> 202 <p> 203 Point 204 </p> 205 </th> 206<th> 207 <p> 208 Range 209 </p> 210 </th> 211</tr></thead> 212<tbody> 213<tr> 214<td> 215 <p> 216 Point 217 </p> 218 </td> 219<td> 220 <p> 221 <span class="inlinemediaobject"><img src="../../../img/ok.png" alt="ok"></span> 222 </p> 223 </td> 224<td> 225 <p> 226 <span class="inlinemediaobject"><img src="../../../img/ok.png" alt="ok"></span> 227 </p> 228 </td> 229</tr> 230<tr> 231<td> 232 <p> 233 Segment 234 </p> 235 </td> 236<td> 237 <p> 238 <span class="inlinemediaobject"><img src="../../../img/ok.png" alt="ok"></span> 239 </p> 240 </td> 241<td> 242 <p> 243 <span class="inlinemediaobject"><img src="../../../img/ok.png" alt="ok"></span> 244 </p> 245 </td> 246</tr> 247<tr> 248<td> 249 <p> 250 Box 251 </p> 252 </td> 253<td> 254 <p> 255 <span class="inlinemediaobject"><img src="../../../img/ok.png" alt="ok"></span> 256 </p> 257 </td> 258<td> 259 <p> 260 <span class="inlinemediaobject"><img src="../../../img/ok.png" alt="ok"></span> 261 </p> 262 </td> 263</tr> 264<tr> 265<td> 266 <p> 267 Linestring 268 </p> 269 </td> 270<td> 271 <p> 272 <span class="inlinemediaobject"><img src="../../../img/ok.png" alt="ok"></span> 273 </p> 274 </td> 275<td> 276 <p> 277 <span class="inlinemediaobject"><img src="../../../img/ok.png" alt="ok"></span> 278 </p> 279 </td> 280</tr> 281<tr> 282<td> 283 <p> 284 Ring 285 </p> 286 </td> 287<td> 288 <p> 289 <span class="inlinemediaobject"><img src="../../../img/ok.png" alt="ok"></span> 290 </p> 291 </td> 292<td> 293 <p> 294 <span class="inlinemediaobject"><img src="../../../img/ok.png" alt="ok"></span> 295 </p> 296 </td> 297</tr> 298<tr> 299<td> 300 <p> 301 Polygon 302 </p> 303 </td> 304<td> 305 <p> 306 <span class="inlinemediaobject"><img src="../../../img/ok.png" alt="ok"></span> 307 </p> 308 </td> 309<td> 310 <p> 311 <span class="inlinemediaobject"><img src="../../../img/ok.png" alt="ok"></span> 312 </p> 313 </td> 314</tr> 315<tr> 316<td> 317 <p> 318 MultiPoint 319 </p> 320 </td> 321<td> 322 <p> 323 <span class="inlinemediaobject"><img src="../../../img/ok.png" alt="ok"></span> 324 </p> 325 </td> 326<td> 327 <p> 328 <span class="inlinemediaobject"><img src="../../../img/ok.png" alt="ok"></span> 329 </p> 330 </td> 331</tr> 332<tr> 333<td> 334 <p> 335 MultiLinestring 336 </p> 337 </td> 338<td> 339 <p> 340 <span class="inlinemediaobject"><img src="../../../img/ok.png" alt="ok"></span> 341 </p> 342 </td> 343<td> 344 <p> 345 <span class="inlinemediaobject"><img src="../../../img/ok.png" alt="ok"></span> 346 </p> 347 </td> 348</tr> 349<tr> 350<td> 351 <p> 352 MultiPolygon 353 </p> 354 </td> 355<td> 356 <p> 357 <span class="inlinemediaobject"><img src="../../../img/ok.png" alt="ok"></span> 358 </p> 359 </td> 360<td> 361 <p> 362 <span class="inlinemediaobject"><img src="../../../img/ok.png" alt="ok"></span> 363 </p> 364 </td> 365</tr> 366</tbody> 367</table></div> 368<h6> 369<a name="geometry.reference.algorithms.append.h5"></a> 370 <span class="phrase"><a name="geometry.reference.algorithms.append.behavior"></a></span><a class="link" href="append.html#geometry.reference.algorithms.append.behavior">Behavior</a> 371 </h6> 372<div class="informaltable"><table class="table"> 373<colgroup> 374<col> 375<col> 376</colgroup> 377<thead><tr> 378<th> 379 <p> 380 Case 381 </p> 382 </th> 383<th> 384 <p> 385 Behavior 386 </p> 387 </th> 388</tr></thead> 389<tbody> 390<tr> 391<td> 392 <p> 393 Point, Box, Segment 394 </p> 395 </td> 396<td> 397 <p> 398 Compiles, but no action 399 </p> 400 </td> 401</tr> 402<tr> 403<td> 404 <p> 405 Linestring 406 </p> 407 </td> 408<td> 409 <p> 410 Appends point or range to the end of the linestring 411 </p> 412 </td> 413</tr> 414<tr> 415<td> 416 <p> 417 Ring 418 </p> 419 </td> 420<td> 421 <p> 422 Appends point or range to the end of the ring (without explicitly 423 closing it) 424 </p> 425 </td> 426</tr> 427<tr> 428<td> 429 <p> 430 Polygon 431 </p> 432 </td> 433<td> 434 <p> 435 Appends point or range to the end of the polygon (without explicitly 436 closing it), either the exterior ring (the default) or specify 437 a zero-based index for one of the interior rings. In the last 438 case, the interior rings are not resized automatically, so ensure 439 that the zero-based index is smaller than the number of interior 440 rings 441 </p> 442 </td> 443</tr> 444<tr> 445<td> 446 <p> 447 Multi Linestring 448 </p> 449 </td> 450<td> 451 <p> 452 Appends point or range to the end of the linestring with the 453 given multi index. The multi-linestring is not resized automatically, 454 so ensure that the multi index is smaller than then number of 455 linestring in the multi-linestring. 456 </p> 457 </td> 458</tr> 459<tr> 460<td> 461 <p> 462 Multi Polygon 463 </p> 464 </td> 465<td> 466 <p> 467 Appends point or range to the end of the polygon (without explicitly 468 closing it) with the given multi-index. The point or range is 469 appended at the end of the exterior ring (the default) or specify 470 a zero-based ring index for the interior rings. The multi-polygon 471 is not resized automatically, so ensure that the multi index 472 is smaller than then number of polygon in the multi-polygon. 473 The same applies for the interior rings of the polygon: the interior 474 rings are not resized automatically, so ensure that the zero-based 475 ring index is smaller than the number of interior rings of the 476 polygon. 477 </p> 478 </td> 479</tr> 480</tbody> 481</table></div> 482<h6> 483<a name="geometry.reference.algorithms.append.h6"></a> 484 <span class="phrase"><a name="geometry.reference.algorithms.append.complexity"></a></span><a class="link" href="append.html#geometry.reference.algorithms.append.complexity">Complexity</a> 485 </h6> 486<p> 487 Linear 488 </p> 489<h6> 490<a name="geometry.reference.algorithms.append.h7"></a> 491 <span class="phrase"><a name="geometry.reference.algorithms.append.example"></a></span><a class="link" href="append.html#geometry.reference.algorithms.append.example">Example</a> 492 </h6> 493<p> 494 Shows usage of Boost.Geometry's append to append a point or a range to 495 a polygon 496 </p> 497<p> 498</p> 499<pre class="programlisting"><span class="preprocessor">#include</span> <span class="special"><</span><span class="identifier">iostream</span><span class="special">></span> 500 501<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> 502<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">polygon</span><span class="special">.</span><span class="identifier">hpp</span><span class="special">></span> 503<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">adapted</span><span class="special">/</span><span class="identifier">boost_tuple</span><span class="special">.</span><span class="identifier">hpp</span><span class="special">></span> 504 505<span class="preprocessor">#include</span> <span class="special"><</span><span class="identifier">boost</span><span class="special">/</span><span class="identifier">assign</span><span class="special">.</span><span class="identifier">hpp</span><span class="special">></span> <a class="co" name="geometry.reference.algorithms.append.c0" href="append.html#geometry.reference.algorithms.append.c1"><img src="../../../../../../../doc/src/images/callouts/1.png" alt="1" border="0"></a> 506 507<span class="identifier">BOOST_GEOMETRY_REGISTER_BOOST_TUPLE_CS</span><span class="special">(</span><span class="identifier">cs</span><span class="special">::</span><span class="identifier">cartesian</span><span class="special">)</span> 508 509<span class="keyword">int</span> <span class="identifier">main</span><span class="special">()</span> 510<span class="special">{</span> 511 <span class="keyword">using</span> <span class="identifier">boost</span><span class="special">::</span><span class="identifier">assign</span><span class="special">::</span><span class="identifier">tuple_list_of</span><span class="special">;</span> 512 <span class="keyword">using</span> <span class="identifier">boost</span><span class="special">::</span><span class="identifier">make_tuple</span><span class="special">;</span> 513 <span class="keyword">using</span> <span class="identifier">boost</span><span class="special">::</span><span class="identifier">geometry</span><span class="special">::</span><span class="identifier">append</span><span class="special">;</span> 514 515 <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">boost</span><span class="special">::</span><span class="identifier">tuple</span><span class="special"><</span><span class="keyword">int</span><span class="special">,</span> <span class="keyword">int</span><span class="special">></span> <span class="special">></span> <span class="identifier">polygon</span><span class="special">;</span> 516 517 <span class="identifier">polygon</span> <span class="identifier">poly</span><span class="special">;</span> 518 519 <span class="comment">// Append a range</span> 520 <span class="identifier">append</span><span class="special">(</span><span class="identifier">poly</span><span class="special">,</span> <span class="identifier">tuple_list_of</span><span class="special">(</span><span class="number">0</span><span class="special">,</span> <span class="number">0</span><span class="special">)(</span><span class="number">0</span><span class="special">,</span> <span class="number">10</span><span class="special">)(</span><span class="number">11</span><span class="special">,</span> <span class="number">11</span><span class="special">)(</span><span class="number">10</span><span class="special">,</span> <span class="number">0</span><span class="special">));</span> <a class="co" name="geometry.reference.algorithms.append.c2" href="append.html#geometry.reference.algorithms.append.c3"><img src="../../../../../../../doc/src/images/callouts/2.png" alt="2" border="0"></a> 521 <span class="comment">// Append a point (in this case the closing point)</span> 522 <span class="identifier">append</span><span class="special">(</span><span class="identifier">poly</span><span class="special">,</span> <span class="identifier">make_tuple</span><span class="special">(</span><span class="number">0</span><span class="special">,</span> <span class="number">0</span><span class="special">));</span> 523 524 <span class="comment">// Create an interior ring (append does not do this automatically)</span> 525 <span class="identifier">boost</span><span class="special">::</span><span class="identifier">geometry</span><span class="special">::</span><span class="identifier">interior_rings</span><span class="special">(</span><span class="identifier">poly</span><span class="special">).</span><span class="identifier">resize</span><span class="special">(</span><span class="number">1</span><span class="special">);</span> 526 527 <span class="comment">// Append a range to the interior ring</span> 528 <span class="identifier">append</span><span class="special">(</span><span class="identifier">poly</span><span class="special">,</span> <span class="identifier">tuple_list_of</span><span class="special">(</span><span class="number">2</span><span class="special">,</span> <span class="number">2</span><span class="special">)(</span><span class="number">2</span><span class="special">,</span> <span class="number">5</span><span class="special">)(</span><span class="number">6</span><span class="special">,</span> <span class="number">6</span><span class="special">)(</span><span class="number">5</span><span class="special">,</span> <span class="number">2</span><span class="special">),</span> <span class="number">0</span><span class="special">);</span> <a class="co" name="geometry.reference.algorithms.append.c4" href="append.html#geometry.reference.algorithms.append.c5"><img src="../../../../../../../doc/src/images/callouts/3.png" alt="3" border="0"></a> 529 <span class="comment">// Append a point to the first interior ring</span> 530 <span class="identifier">append</span><span class="special">(</span><span class="identifier">poly</span><span class="special">,</span> <span class="identifier">make_tuple</span><span class="special">(</span><span class="number">2</span><span class="special">,</span> <span class="number">2</span><span class="special">),</span> <span class="number">0</span><span class="special">);</span> 531 532 <span class="identifier">std</span><span class="special">::</span><span class="identifier">cout</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">dsv</span><span class="special">(</span><span class="identifier">poly</span><span class="special">)</span> <span class="special"><<</span> <span class="identifier">std</span><span class="special">::</span><span class="identifier">endl</span><span class="special">;</span> 533 534 <span class="keyword">return</span> <span class="number">0</span><span class="special">;</span> 535<span class="special">}</span> 536</pre> 537<p> 538 </p> 539<div class="calloutlist"><table border="0" summary="Callout list"> 540<tr> 541<td width="5%" valign="top" align="left"><p><a name="geometry.reference.algorithms.append.c1"></a><a href="#geometry.reference.algorithms.append.c0"><img src="../../../../../../../doc/src/images/callouts/1.png" alt="1" border="0"></a> </p></td> 542<td valign="top" align="left"><p> 543 At the end to avoid conflicts with Boost.QVM 544 </p></td> 545</tr> 546<tr> 547<td width="5%" valign="top" align="left"><p><a name="geometry.reference.algorithms.append.c3"></a><a href="#geometry.reference.algorithms.append.c2"><img src="../../../../../../../doc/src/images/callouts/2.png" alt="2" border="0"></a> </p></td> 548<td valign="top" align="left"><p> 549 tuple_list_of delivers a range and can therefore be used in boost::geometry::append 550 </p></td> 551</tr> 552<tr> 553<td width="5%" valign="top" align="left"><p><a name="geometry.reference.algorithms.append.c5"></a><a href="#geometry.reference.algorithms.append.c4"><img src="../../../../../../../doc/src/images/callouts/3.png" alt="3" border="0"></a> </p></td> 554<td valign="top" align="left"><p> 555 The last parameter ring_index 0 denotes the first interior ring 556 </p></td> 557</tr> 558</table></div> 559<p> 560 Output: 561 </p> 562<pre class="programlisting">(((0, 0), (0, 10), (11, 11), (10, 0), (0, 0)), ((2, 2), (2, 5), (6, 6), (5, 2), (2, 2))) 563</pre> 564<h6> 565<a name="geometry.reference.algorithms.append.h8"></a> 566 <span class="phrase"><a name="geometry.reference.algorithms.append.see_also"></a></span><a class="link" href="append.html#geometry.reference.algorithms.append.see_also">See 567 also</a> 568 </h6> 569<div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: disc; "><li class="listitem"> 570 <a class="link" href="assign/assign_points.html" title="assign_points">assign</a> 571 </li></ul></div> 572</div> 573<table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr> 574<td align="left"></td> 575<td align="right"><div class="copyright-footer">Copyright © 2009-2019 Barend Gehrels, Bruno Lalande, Mateusz Loskot, Adam 576 Wulkiewicz, Oracle and/or its affiliates<p> 577 Distributed under the Boost Software License, Version 1.0. (See accompanying 578 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>) 579 </p> 580</div></td> 581</tr></table> 582<hr> 583<div class="spirit-nav"> 584<a accesskey="p" href="assign/assign_zero.html"><img src="../../../../../../../doc/src/images/prev.png" alt="Prev"></a><a accesskey="u" href="../algorithms.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="buffer.html"><img src="../../../../../../../doc/src/images/next.png" alt="Next"></a> 585</div> 586</body> 587</html> 588
