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  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="idp89240608"></a>
  31 Appends 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">&lt;</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">&gt;</span>
  40 <span class="keyword">void</span> <span class="identifier">append</span><span class="special">(</span><span class="identifier">Geometry</span> <span class="special">&amp;</span> <span class="identifier">geometry</span><span class="special">,</span> <span class="identifier">RangeOrPoint</span> <span class="keyword">const</span> <span class="special">&amp;</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 &amp;
  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 &amp;
 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">&lt;</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">&gt;</span></code>
 173         </p>
 174 <p>
 175           Or
 176         </p>
 177 <p>
 178           <code class="computeroutput"><span class="preprocessor">#include</span> <span class="special">&lt;</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">&gt;</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">&lt;</span><span class="identifier">iostream</span><span class="special">&gt;</span>
 500
 501 <span class="preprocessor">#include</span> <span class="special">&lt;</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">&gt;</span>
 502 <span class="preprocessor">#include</span> <span class="special">&lt;</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">&gt;</span>
 503 <span class="preprocessor">#include</span> <span class="special">&lt;</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">&gt;</span>
 504
 505 <span class="preprocessor">#include</span> <span class="special">&lt;</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">&gt;</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">&lt;</span><span class="identifier">boost</span><span class="special">::</span><span class="identifier">tuple</span><span class="special">&lt;</span><span class="keyword">int</span><span class="special">,</span> <span class="keyword">int</span><span class="special">&gt;</span> <span class="special">&gt;</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">&lt;&lt;</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">&lt;&lt;</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 &#169; 2009-2017 Barend
 576       Gehrels, Bruno Lalande, Mateusz Loskot, Adam Wulkiewicz, Oracle and/or its
 577       affiliates<p>
 578         Distributed under the Boost Software License, Version 1.0. (See accompanying
 579         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>)
 580       </p>
 581 </div></td>
 582 </tr></table>
 583 <hr>
 584 <div class="spirit-nav">
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