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  25 <div class="section">
  26 <div class="titlepage"><div><div><h5 class="title">
  27 <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
  28           (with strategies)</a>
  29 </h5></div></div></div>
  30 <p>
  31             <a class="indexterm" name="idm46187008039696"></a>
  32 Calculates the buffer of a geometry.
  33           </p>
  34 <h6>
  35 <a name="geometry.reference.algorithms.buffer.buffer_7_with_strategies.h0"></a>
  36             <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>
  37           </h6>
  38 <p>
  39             The free function buffer calculates the buffer (a polygon being the spatial
  40             point set collection within a specified maximum distance from a geometry)
  41             of a geometry.
  42           </p>
  43 <h6>
  44 <a name="geometry.reference.algorithms.buffer.buffer_7_with_strategies.h1"></a>
  45             <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>
  46           </h6>
  47 <p>
  48 </p>
  49 <pre class="programlisting"><span class="keyword">template</span><span class="special">&lt;</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>
  50          <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">&gt;</span>
  51 <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">&amp;</span> <span class="identifier">geometry_in</span><span class="special">,</span> <span class="identifier">MultiPolygon</span> <span class="special">&amp;</span> <span class="identifier">geometry_out</span><span class="special">,</span> <span class="identifier">DistanceStrategy</span> <span class="keyword">const</span> <span class="special">&amp;</span> <span class="identifier">distance_strategy</span><span class="special">,</span>
  52             <span class="identifier">SideStrategy</span> <span class="keyword">const</span> <span class="special">&amp;</span> <span class="identifier">side_strategy</span><span class="special">,</span> <span class="identifier">JoinStrategy</span> <span class="keyword">const</span> <span class="special">&amp;</span> <span class="identifier">join_strategy</span><span class="special">,</span> <span class="identifier">EndStrategy</span> <span class="keyword">const</span> <span class="special">&amp;</span> <span class="identifier">end_strategy</span><span class="special">,</span>
  53             <span class="identifier">PointStrategy</span> <span class="keyword">const</span> <span class="special">&amp;</span> <span class="identifier">point_strategy</span><span class="special">)</span></pre>
  54 <p>
  55           </p>
  56 <h6>
  57 <a name="geometry.reference.algorithms.buffer.buffer_7_with_strategies.h2"></a>
  58             <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>
  59           </h6>
  60 <div class="informaltable"><table class="table">
  61 <colgroup>
  62 <col>
  63 <col>
  64 <col>
  65 <col>
  66 </colgroup>
  67 <thead><tr>
  68 <th>
  69                     <p>
  70                       Type
  71                     </p>
  72                   </th>
  73 <th>
  74                     <p>
  75                       Concept
  76                     </p>
  77                   </th>
  78 <th>
  79                     <p>
  80                       Name
  81                     </p>
  82                   </th>
  83 <th>
  84                     <p>
  85                       Description
  86                     </p>
  87                   </th>
  88 </tr></thead>
  89 <tbody>
  90 <tr>
  91 <td>
  92                     <p>
  93                       GeometryIn const &amp;
  94                     </p>
  95                   </td>
  96 <td>
  97                     <p>
  98                       Any type fulfilling a Geometry Concept
  99                     </p>
 100                   </td>
 101 <td>
 102                     <p>
 103                       geometry_in
 104                     </p>
 105                   </td>
 106 <td>
 107                     <p>
 108                       A model of the specified concept
 109                     </p>
 110                   </td>
 111 </tr>
 112 <tr>
 113 <td>
 114                     <p>
 115                       MultiPolygon &amp;
 116                     </p>
 117                   </td>
 118 <td>
 119                     <p>
 120                       A type fulfilling the MultiPolygon Concept
 121                     </p>
 122                   </td>
 123 <td>
 124                     <p>
 125                       geometry_out
 126                     </p>
 127                   </td>
 128 <td>
 129                     <p>
 130                       output multi polygon (or std:: collection of polygons), will
 131                       contain a buffered version of the input geometry
 132                     </p>
 133                   </td>
 134 </tr>
 135 <tr>
 136 <td>
 137                     <p>
 138                       DistanceStrategy const &amp;
 139                     </p>
 140                   </td>
 141 <td>
 142                     <p>
 143                       A strategy defining distance (or radius)
 144                     </p>
 145                   </td>
 146 <td>
 147                     <p>
 148                       distance_strategy
 149                     </p>
 150                   </td>
 151 <td>
 152                     <p>
 153                       The distance strategy to be used
 154                     </p>
 155                   </td>
 156 </tr>
 157 <tr>
 158 <td>
 159                     <p>
 160                       SideStrategy const &amp;
 161                     </p>
 162                   </td>
 163 <td>
 164                     <p>
 165                       A strategy defining creation along sides
 166                     </p>
 167                   </td>
 168 <td>
 169                     <p>
 170                       side_strategy
 171                     </p>
 172                   </td>
 173 <td>
 174                     <p>
 175                       The side strategy to be used
 176                     </p>
 177                   </td>
 178 </tr>
 179 <tr>
 180 <td>
 181                     <p>
 182                       JoinStrategy const &amp;
 183                     </p>
 184                   </td>
 185 <td>
 186                     <p>
 187                       A strategy defining creation around convex corners
 188                     </p>
 189                   </td>
 190 <td>
 191                     <p>
 192                       join_strategy
 193                     </p>
 194                   </td>
 195 <td>
 196                     <p>
 197                       The join strategy to be used
 198                     </p>
 199                   </td>
 200 </tr>
 201 <tr>
 202 <td>
 203                     <p>
 204                       EndStrategy const &amp;
 205                     </p>
 206                   </td>
 207 <td>
 208                     <p>
 209                       A strategy defining creation at linestring ends
 210                     </p>
 211                   </td>
 212 <td>
 213                     <p>
 214                       end_strategy
 215                     </p>
 216                   </td>
 217 <td>
 218                     <p>
 219                       The end strategy to be used
 220                     </p>
 221                   </td>
 222 </tr>
 223 <tr>
 224 <td>
 225                     <p>
 226                       PointStrategy const &amp;
 227                     </p>
 228                   </td>
 229 <td>
 230                     <p>
 231                       A strategy defining creation around points
 232                     </p>
 233                   </td>
 234 <td>
 235                     <p>
 236                       point_strategy
 237                     </p>
 238                   </td>
 239 <td>
 240                     <p>
 241                       The point strategy to be used
 242                     </p>
 243                   </td>
 244 </tr>
 245 </tbody>
 246 </table></div>
 247 <h6>
 248 <a name="geometry.reference.algorithms.buffer.buffer_7_with_strategies.h3"></a>
 249             <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>
 250           </h6>
 251 <p>
 252             Either
 253           </p>
 254 <p>
 255             <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>
 256           </p>
 257 <p>
 258             Or
 259           </p>
 260 <p>
 261             <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">buffer</span><span class="special">.</span><span class="identifier">hpp</span><span class="special">&gt;</span></code>
 262           </p>
 263 <h6>
 264 <a name="geometry.reference.algorithms.buffer.buffer_7_with_strategies.h4"></a>
 265             <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>
 266           </h6>
 267 <p>
 268             The 5 strategies give the user control to the generated buffer
 269           </p>
 270 <div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: disc; ">
 271 <li class="listitem">
 272                 convex corners can be rounded or sharp
 273               </li>
 274 <li class="listitem">
 275                 line-ends can be rounded or flat
 276               </li>
 277 <li class="listitem">
 278                 distance can be symmetric or assymetric, and positive or negative
 279               </li>
 280 <li class="listitem">
 281                 around points the shape can be circular or square
 282               </li>
 283 <li class="listitem">
 284                 the sides can be controlled (currently there is only one option provided)
 285               </li>
 286 </ul></div>
 287 <p>
 288             By specifying a negative distance for the distance_strategy, for the
 289             (multi) polygon case, the polygon will be smaller (also known as deflate).
 290             The distance cannot be 0.
 291           </p>
 292 <p>
 293             The next figure shows where in the generated buffer the strategies have
 294             effect
 295           </p>
 296 <p>
 297             <span class="inlinemediaobject"><img src="../../../../img/algorithms/buffer_strategies.png" alt="buffer_strategies"></span>
 298           </p>
 299 <h6>
 300 <a name="geometry.reference.algorithms.buffer.buffer_7_with_strategies.h5"></a>
 301             <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>
 302           </h6>
 303 <p>
 304             The function buffer implements function Buffer from the <a href="http://www.opengeospatial.org/standards/sfa" target="_top">OGC
 305             Simple Feature Specification</a>.
 306           </p>
 307 <p>
 308             It is conformant if used with the following combination of strategies:
 309             <a class="link" href="../../strategies/strategy_buffer_join_round.html" title="strategy::buffer::join_round">join_round</a>,
 310             <a class="link" href="../../strategies/strategy_buffer_end_round.html" title="strategy::buffer::end_round">end_round</a>,
 311             <a class="link" href="../../strategies/strategy_buffer_distance_symmetric.html" title="strategy::buffer::distance_symmetric">distance_symmetric</a>,
 312             <a class="link" href="../../strategies/strategy_buffer_point_circle.html" title="strategy::buffer::point_circle">point_circle</a>,
 313             side_straight
 314           </p>
 315 <h6>
 316 <a name="geometry.reference.algorithms.buffer.buffer_7_with_strategies.h6"></a>
 317             <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
 318             geometries</a>
 319           </h6>
 320 <div class="informaltable"><table class="table">
 321 <colgroup>
 322 <col>
 323 <col>
 324 <col>
 325 </colgroup>
 326 <thead><tr>
 327 <th>
 328                   </th>
 329 <th>
 330                     <p>
 331                       2D Cartesian
 332                     </p>
 333                   </th>
 334 <th>
 335                     <p>
 336                       Geographic
 337                     </p>
 338                   </th>
 339 </tr></thead>
 340 <tbody>
 341 <tr>
 342 <td>
 343                     <p>
 344                       Point
 345                     </p>
 346                   </td>
 347 <td>
 348                     <p>
 349                       <span class="inlinemediaobject"><img src="../../../../img/ok.png" alt="ok"></span>
 350                     </p>
 351                   </td>
 352 <td>
 353                     <p>
 354                       <span class="inlinemediaobject"><img src="../../../../img/ok.png" alt="ok"></span>
 355                     </p>
 356                   </td>
 357 </tr>
 358 <tr>
 359 <td>
 360                     <p>
 361                       Segment
 362                     </p>
 363                   </td>
 364 <td>
 365                     <p>
 366                       <span class="inlinemediaobject"><img src="../../../../img/nyi.png" alt="nyi"></span>
 367                     </p>
 368                   </td>
 369 <td>
 370                     <p>
 371                       <span class="inlinemediaobject"><img src="../../../../img/nyi.png" alt="nyi"></span>
 372                     </p>
 373                   </td>
 374 </tr>
 375 <tr>
 376 <td>
 377                     <p>
 378                       Box
 379                     </p>
 380                   </td>
 381 <td>
 382                     <p>
 383                       <span class="inlinemediaobject"><img src="../../../../img/nyi.png" alt="nyi"></span>
 384                     </p>
 385                   </td>
 386 <td>
 387                     <p>
 388                       <span class="inlinemediaobject"><img src="../../../../img/nyi.png" alt="nyi"></span>
 389                     </p>
 390                   </td>
 391 </tr>
 392 <tr>
 393 <td>
 394                     <p>
 395                       Linestring
 396                     </p>
 397                   </td>
 398 <td>
 399                     <p>
 400                       <span class="inlinemediaobject"><img src="../../../../img/ok.png" alt="ok"></span>
 401                     </p>
 402                   </td>
 403 <td>
 404                     <p>
 405                       <span class="inlinemediaobject"><img src="../../../../img/nyi.png" alt="nyi"></span>
 406                     </p>
 407                   </td>
 408 </tr>
 409 <tr>
 410 <td>
 411                     <p>
 412                       Ring
 413                     </p>
 414                   </td>
 415 <td>
 416                     <p>
 417                       <span class="inlinemediaobject"><img src="../../../../img/ok.png" alt="ok"></span>
 418                     </p>
 419                   </td>
 420 <td>
 421                     <p>
 422                       <span class="inlinemediaobject"><img src="../../../../img/nyi.png" alt="nyi"></span>
 423                     </p>
 424                   </td>
 425 </tr>
 426 <tr>
 427 <td>
 428                     <p>
 429                       Polygon
 430                     </p>
 431                   </td>
 432 <td>
 433                     <p>
 434                       <span class="inlinemediaobject"><img src="../../../../img/ok.png" alt="ok"></span>
 435                     </p>
 436                   </td>
 437 <td>
 438                     <p>
 439                       <span class="inlinemediaobject"><img src="../../../../img/nyi.png" alt="nyi"></span>
 440                     </p>
 441                   </td>
 442 </tr>
 443 <tr>
 444 <td>
 445                     <p>
 446                       MultiPoint
 447                     </p>
 448                   </td>
 449 <td>
 450                     <p>
 451                       <span class="inlinemediaobject"><img src="../../../../img/ok.png" alt="ok"></span>
 452                     </p>
 453                   </td>
 454 <td>
 455                     <p>
 456                       <span class="inlinemediaobject"><img src="../../../../img/nyi.png" alt="nyi"></span>
 457                     </p>
 458                   </td>
 459 </tr>
 460 <tr>
 461 <td>
 462                     <p>
 463                       MultiLinestring
 464                     </p>
 465                   </td>
 466 <td>
 467                     <p>
 468                       <span class="inlinemediaobject"><img src="../../../../img/ok.png" alt="ok"></span>
 469                     </p>
 470                   </td>
 471 <td>
 472                     <p>
 473                       <span class="inlinemediaobject"><img src="../../../../img/nyi.png" alt="nyi"></span>
 474                     </p>
 475                   </td>
 476 </tr>
 477 <tr>
 478 <td>
 479                     <p>
 480                       MultiPolygon
 481                     </p>
 482                   </td>
 483 <td>
 484                     <p>
 485                       <span class="inlinemediaobject"><img src="../../../../img/ok.png" alt="ok"></span>
 486                     </p>
 487                   </td>
 488 <td>
 489                     <p>
 490                       <span class="inlinemediaobject"><img src="../../../../img/nyi.png" alt="nyi"></span>
 491                     </p>
 492                   </td>
 493 </tr>
 494 </tbody>
 495 </table></div>
 496 <h6>
 497 <a name="geometry.reference.algorithms.buffer.buffer_7_with_strategies.h7"></a>
 498             <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>
 499           </h6>
 500 <p>
 501             Shows how the buffer algorithm can be used to create a buffer of a linestring,
 502             a multi point, a multi polygon
 503           </p>
 504 <p>
 505 </p>
 506 <pre class="programlisting"><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>
 507 <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">point_xy</span><span class="special">.</span><span class="identifier">hpp</span><span class="special">&gt;</span>
 508 <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">geometries</span><span class="special">.</span><span class="identifier">hpp</span><span class="special">&gt;</span>
 509
 510
 511 <span class="keyword">int</span> <span class="identifier">main</span><span class="special">()</span>
 512 <span class="special">{</span>
 513     <span class="keyword">typedef</span> <span class="keyword">double</span> <span class="identifier">coordinate_type</span><span class="special">;</span>
 514     <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">&lt;</span><span class="identifier">coordinate_type</span><span class="special">&gt;</span> <span class="identifier">point</span><span class="special">;</span>
 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">point</span><span class="special">&gt;</span> <span class="identifier">polygon</span><span class="special">;</span>
 516
 517     <span class="comment">// Declare strategies</span>
 518     <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>
 519     <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>
 520     <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">&lt;</span><span class="identifier">coordinate_type</span><span class="special">&gt;</span> <span class="identifier">distance_strategy</span><span class="special">(</span><span class="identifier">buffer_distance</span><span class="special">);</span>
 521     <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>
 522     <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>
 523     <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>
 524     <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>
 525
 526     <span class="comment">// Declare output</span>
 527     <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">&lt;</span><span class="identifier">polygon</span><span class="special">&gt;</span> <span class="identifier">result</span><span class="special">;</span>
 528
 529     <span class="comment">// Declare/fill a linestring</span>
 530     <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">&lt;</span><span class="identifier">point</span><span class="special">&gt;</span> <span class="identifier">ls</span><span class="special">;</span>
 531     <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>
 532
 533     <span class="comment">// Create the buffer of a linestring</span>
 534     <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>
 535                 <span class="identifier">distance_strategy</span><span class="special">,</span> <span class="identifier">side_strategy</span><span class="special">,</span>
 536                 <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>
 537
 538
 539     <span class="comment">// Declare/fill a multi point</span>
 540     <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">&lt;</span><span class="identifier">point</span><span class="special">&gt;</span> <span class="identifier">mp</span><span class="special">;</span>
 541     <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>
 542
 543     <span class="comment">// Create the buffer of a multi point</span>
 544     <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>
 545                 <span class="identifier">distance_strategy</span><span class="special">,</span> <span class="identifier">side_strategy</span><span class="special">,</span>
 546                 <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>
 547
 548
 549     <span class="comment">// Declare/fill a multi_polygon</span>
 550     <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">&lt;</span><span class="identifier">polygon</span><span class="special">&gt;</span> <span class="identifier">mpol</span><span class="special">;</span>
 551     <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>
 552
 553     <span class="comment">// Create the buffer of a multi polygon</span>
 554     <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>
 555                 <span class="identifier">distance_strategy</span><span class="special">,</span> <span class="identifier">side_strategy</span><span class="special">,</span>
 556                 <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>
 557
 558
 559     <span class="keyword">return</span> <span class="number">0</span><span class="special">;</span>
 560 <span class="special">}</span>
 561 </pre>
 562 <p>
 563           </p>
 564 <h6>
 565 <a name="geometry.reference.algorithms.buffer.buffer_7_with_strategies.h8"></a>
 566             <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
 567             linestring case</a>
 568           </h6>
 569 <p>
 570             <span class="inlinemediaobject"><img src="../../../../img/algorithms/buffer_linestring.png" alt="buffer_linestring"></span>
 571           </p>
 572 <h6>
 573 <a name="geometry.reference.algorithms.buffer.buffer_7_with_strategies.h9"></a>
 574             <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
 575             multi_point case</a>
 576           </h6>
 577 <p>
 578             <span class="inlinemediaobject"><img src="../../../../img/algorithms/buffer_multi_point.png" alt="buffer_multi_point"></span>
 579           </p>
 580 <h6>
 581 <a name="geometry.reference.algorithms.buffer.buffer_7_with_strategies.h10"></a>
 582             <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
 583             multi_polygon case</a>
 584           </h6>
 585 <p>
 586             <span class="inlinemediaobject"><img src="../../../../img/algorithms/buffer_multi_polygon.png" alt="buffer_multi_polygon"></span>
 587           </p>
 588 <h6>
 589 <a name="geometry.reference.algorithms.buffer.buffer_7_with_strategies.h11"></a>
 590             <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
 591             Strategies</a>
 592           </h6>
 593 <div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: disc; ">
 594 <li class="listitem">
 595                 JoinStrategy: <a class="link" href="../../strategies/strategy_buffer_join_round.html" title="strategy::buffer::join_round">join_round
 596                 (cartesian)</a>
 597               </li>
 598 <li class="listitem">
 599                 JoinStrategy: <a class="link" href="../../strategies/strategy_buffer_join_miter.html" title="strategy::buffer::join_miter">join_miter
 600                 (cartesian)</a>
 601               </li>
 602 <li class="listitem">
 603                 EndStrategy: <a class="link" href="../../strategies/strategy_buffer_end_round.html" title="strategy::buffer::end_round">end_round
 604                 (cartesian)</a>
 605               </li>
 606 <li class="listitem">
 607                 EndStrategy: <a class="link" href="../../strategies/strategy_buffer_end_flat.html" title="strategy::buffer::end_flat">end_flat
 608                 (cartesian)</a>
 609               </li>
 610 <li class="listitem">
 611                 DistanceStrategy: <a class="link" href="../../strategies/strategy_buffer_distance_symmetric.html" title="strategy::buffer::distance_symmetric">distance_symmetric</a>
 612               </li>
 613 <li class="listitem">
 614                 DistanceStrategy: <a class="link" href="../../strategies/strategy_buffer_distance_asymmetric.html" title="strategy::buffer::distance_asymmetric">distance_asymmetric</a>
 615               </li>
 616 <li class="listitem">
 617                 PointStrategy: <a class="link" href="../../strategies/strategy_buffer_point_circle.html" title="strategy::buffer::point_circle">point_circle
 618                 (cartesian)</a>
 619               </li>
 620 <li class="listitem">
 621                 PointStrategy: <a class="link" href="../../strategies/strategy_buffer_point_square.html" title="strategy::buffer::point_square">point_square
 622                 (cartesian)</a>
 623               </li>
 624 <li class="listitem">
 625                 PointStrategy: <a class="link" href="../../strategies/strategy_buffer_geographic_point_circle.html" title="strategy::buffer::geographic_point_circle">geographic_point_circle
 626                 (geographic)</a>
 627               </li>
 628 <li class="listitem">
 629                 SideStrategy: <a class="link" href="../../strategies/strategy_buffer_side_straight.html" title="strategy::buffer::side_straight">side_straight
 630                 (cartesian)</a>
 631               </li>
 632 </ul></div>
 633 </div>
 634 <table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr>
 635 <td align="left"></td>
 636 <td align="right"><div class="copyright-footer">Copyright &#169; 2009-2019 Barend Gehrels, Bruno Lalande, Mateusz Loskot, Adam
 637       Wulkiewicz, Oracle and/or its affiliates<p>
 638         Distributed under the Boost Software License, Version 1.0. (See accompanying
 639         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>)
 640       </p>
 641 </div></td>
 642 </tr></table>
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