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  26 <div class="titlepage"><div><div><h4 class="title">
  27 <a name="geometry.reference.models.model_point"></a><a class="link" href="model_point.html" title="model::point">model::point</a>
  28 </h4></div></div></div>
  29 <p>
  30           <a class="indexterm" name="idp111882992"></a><a class="indexterm" name="idp111883680"></a>
  31 Basic point class, having coordinates defined in a neutral way.
  32         </p>
  33 <h6>
  34 <a name="geometry.reference.models.model_point.h0"></a>
  35           <span class="phrase"><a name="geometry.reference.models.model_point.description"></a></span><a class="link" href="model_point.html#geometry.reference.models.model_point.description">Description</a>
  36         </h6>
  37 <p>
  38           Defines a neutral point class, fulfilling the Point Concept. Library users
  39           can use this point class, or use their own point classes. This point class
  40           is used in most of the samples and tests of Boost.Geometry This point class
  41           is used occasionally within the library, where a temporary point class
  42           is necessary.
  43         </p>
  44 <h6>
  45 <a name="geometry.reference.models.model_point.h1"></a>
  46           <span class="phrase"><a name="geometry.reference.models.model_point.model_of"></a></span><a class="link" href="model_point.html#geometry.reference.models.model_point.model_of">Model
  47           of</a>
  48         </h6>
  49 <p>
  50           <a class="link" href="../concepts/concept_point.html" title="Point Concept">Point Concept</a>
  51         </p>
  52 <h6>
  53 <a name="geometry.reference.models.model_point.h2"></a>
  54           <span class="phrase"><a name="geometry.reference.models.model_point.synopsis"></a></span><a class="link" href="model_point.html#geometry.reference.models.model_point.synopsis">Synopsis</a>
  55         </h6>
  56 <p>
  57 </p>
  58 <pre class="programlisting"><span class="keyword">template</span><span class="special">&lt;</span><span class="keyword">typename</span> <span class="identifier">CoordinateType</span><span class="special">,</span> <span class="identifier">std</span><span class="special">::</span><span class="identifier">size_t</span> <span class="identifier">DimensionCount</span><span class="special">,</span> <span class="keyword">typename</span> <span class="identifier">CoordinateSystem</span><span class="special">&gt;</span>
  59 <span class="keyword">class</span> <span class="identifier">model</span><span class="special">::</span><span class="identifier">point</span>
  60 <span class="special">{</span>
  61   <span class="comment">// ...</span>
  62 <span class="special">};</span>
  63 </pre>
  64 <p>
  65         </p>
  66 <h6>
  67 <a name="geometry.reference.models.model_point.h3"></a>
  68           <span class="phrase"><a name="geometry.reference.models.model_point.template_parameter_s_"></a></span><a class="link" href="model_point.html#geometry.reference.models.model_point.template_parameter_s_">Template
  69           parameter(s)</a>
  70         </h6>
  71 <div class="informaltable"><table class="table">
  72 <colgroup>
  73 <col>
  74 <col>
  75 </colgroup>
  76 <thead><tr>
  77 <th>
  78                   <p>
  79                     Parameter
  80                   </p>
  81                 </th>
  82 <th>
  83                   <p>
  84                     Description
  85                   </p>
  86                 </th>
  87 </tr></thead>
  88 <tbody>
  89 <tr>
  90 <td>
  91                   <p>
  92                     typename CoordinateType
  93                   </p>
  94                 </td>
  95 <td>
  96                   <p>
  97                     numerical type (int, double, ttmath, ...)
  98                   </p>
  99                 </td>
 100 </tr>
 101 <tr>
 102 <td>
 103                   <p>
 104                     std::size_t DimensionCount
 105                   </p>
 106                 </td>
 107 <td>
 108                   <p>
 109                     number of coordinates, usually 2 or 3
 110                   </p>
 111                 </td>
 112 </tr>
 113 <tr>
 114 <td>
 115                   <p>
 116                     typename CoordinateSystem
 117                   </p>
 118                 </td>
 119 <td>
 120                   <p>
 121                     coordinate system, for example cs::cartesian
 122                   </p>
 123                 </td>
 124 </tr>
 125 </tbody>
 126 </table></div>
 127 <h6>
 128 <a name="geometry.reference.models.model_point.h4"></a>
 129           <span class="phrase"><a name="geometry.reference.models.model_point.constructor_s_"></a></span><a class="link" href="model_point.html#geometry.reference.models.model_point.constructor_s_">Constructor(s)</a>
 130         </h6>
 131 <div class="informaltable"><table class="table">
 132 <colgroup>
 133 <col>
 134 <col>
 135 <col>
 136 </colgroup>
 137 <thead><tr>
 138 <th>
 139                   <p>
 140                     Function
 141                   </p>
 142                 </th>
 143 <th>
 144                   <p>
 145                     Description
 146                   </p>
 147                 </th>
 148 <th>
 149                   <p>
 150                     Parameters
 151                   </p>
 152                 </th>
 153 </tr></thead>
 154 <tbody>
 155 <tr>
 156 <td>
 157                   <p>
 158 </p>
 159 <pre xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" class="table-programlisting"><span class="identifier">point</span><span class="special">()</span></pre>
 160 <p>
 161                   </p>
 162                 </td>
 163 <td>
 164                   <p>
 165                     Default constructor, no initialization.
 166                   </p>
 167                 </td>
 168 <td>
 169                 </td>
 170 </tr>
 171 <tr>
 172 <td>
 173                   <p>
 174 </p>
 175 <pre xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" class="table-programlisting"><span class="identifier">point</span><span class="special">(</span><span class="identifier">CoordinateType</span> <span class="keyword">const</span> <span class="special">&amp;</span> <span class="identifier">v0</span><span class="special">)</span></pre>
 176 <p>
 177                   </p>
 178                 </td>
 179 <td>
 180                   <p>
 181                     Constructor to set one value.
 182                   </p>
 183                 </td>
 184 <td>
 185                   <p>
 186                     <span class="bold"><strong>CoordinateType const &amp;</strong></span>:
 187                     <span class="emphasis"><em>v0</em></span>:
 188                   </p>
 189                 </td>
 190 </tr>
 191 <tr>
 192 <td>
 193                   <p>
 194 </p>
 195 <pre xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" class="table-programlisting"><span class="identifier">point</span><span class="special">(</span><span class="identifier">CoordinateType</span> <span class="keyword">const</span> <span class="special">&amp;</span> <span class="identifier">v0</span><span class="special">,</span> <span class="identifier">CoordinateType</span> <span class="keyword">const</span> <span class="special">&amp;</span> <span class="identifier">v1</span><span class="special">)</span></pre>
 196 <p>
 197                   </p>
 198                 </td>
 199 <td>
 200                   <p>
 201                     Constructor to set two values.
 202                   </p>
 203                 </td>
 204 <td>
 205                   <p>
 206                     <span class="bold"><strong>CoordinateType const &amp;</strong></span>:
 207                     <span class="emphasis"><em>v0</em></span>:
 208                   </p>
 209                   <p>
 210                     <span class="bold"><strong>CoordinateType const &amp;</strong></span>:
 211                     <span class="emphasis"><em>v1</em></span>:
 212                   </p>
 213                 </td>
 214 </tr>
 215 <tr>
 216 <td>
 217                   <p>
 218 </p>
 219 <pre xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" class="table-programlisting"><span class="identifier">point</span><span class="special">(</span><span class="identifier">CoordinateType</span> <span class="keyword">const</span> <span class="special">&amp;</span> <span class="identifier">v0</span><span class="special">,</span> <span class="identifier">CoordinateType</span> <span class="keyword">const</span> <span class="special">&amp;</span> <span class="identifier">v1</span><span class="special">,</span> <span class="identifier">CoordinateType</span> <span class="keyword">const</span> <span class="special">&amp;</span> <span class="identifier">v2</span><span class="special">)</span></pre>
 220 <p>
 221                   </p>
 222                 </td>
 223 <td>
 224                   <p>
 225                     Constructor to set three values.
 226                   </p>
 227                 </td>
 228 <td>
 229                   <p>
 230                     <span class="bold"><strong>CoordinateType const &amp;</strong></span>:
 231                     <span class="emphasis"><em>v0</em></span>:
 232                   </p>
 233                   <p>
 234                     <span class="bold"><strong>CoordinateType const &amp;</strong></span>:
 235                     <span class="emphasis"><em>v1</em></span>:
 236                   </p>
 237                   <p>
 238                     <span class="bold"><strong>CoordinateType const &amp;</strong></span>:
 239                     <span class="emphasis"><em>v2</em></span>:
 240                   </p>
 241                 </td>
 242 </tr>
 243 </tbody>
 244 </table></div>
 245 <h6>
 246 <a name="geometry.reference.models.model_point.h5"></a>
 247           <span class="phrase"><a name="geometry.reference.models.model_point.member_function_s_"></a></span><a class="link" href="model_point.html#geometry.reference.models.model_point.member_function_s_">Member
 248           Function(s)</a>
 249         </h6>
 250 <div class="informaltable"><table class="table">
 251 <colgroup>
 252 <col>
 253 <col>
 254 <col>
 255 <col>
 256 </colgroup>
 257 <thead><tr>
 258 <th>
 259                   <p>
 260                     Function
 261                   </p>
 262                 </th>
 263 <th>
 264                   <p>
 265                     Description
 266                   </p>
 267                 </th>
 268 <th>
 269                   <p>
 270                     Parameters
 271                   </p>
 272                 </th>
 273 <th>
 274                   <p>
 275                     Returns
 276                   </p>
 277                 </th>
 278 </tr></thead>
 279 <tbody>
 280 <tr>
 281 <td>
 282                   <p>
 283 </p>
 284 <pre xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" class="table-programlisting"><span class="keyword">template</span><span class="special">&lt;</span><span class="identifier">std</span><span class="special">::</span><span class="identifier">size_t</span> <span class="identifier">K</span><span class="special">&gt;</span>
 285 <span class="identifier">CoordinateType</span> <span class="keyword">const</span> <span class="special">&amp;</span> <span class="identifier">get</span><span class="special">()</span></pre>
 286 <p>
 287                   </p>
 288                 </td>
 289 <td>
 290                   <p>
 291                     Get a coordinate.
 292                   </p>
 293                 </td>
 294 <td>
 295                 </td>
 296 <td>
 297                   <p>
 298                     the coordinate
 299                   </p>
 300                 </td>
 301 </tr>
 302 <tr>
 303 <td>
 304                   <p>
 305 </p>
 306 <pre xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" class="table-programlisting"><span class="keyword">template</span><span class="special">&lt;</span><span class="identifier">std</span><span class="special">::</span><span class="identifier">size_t</span> <span class="identifier">K</span><span class="special">&gt;</span>
 307 <span class="keyword">void</span> <span class="identifier">set</span><span class="special">(</span><span class="identifier">CoordinateType</span> <span class="keyword">const</span> <span class="special">&amp;</span> <span class="identifier">value</span><span class="special">)</span></pre>
 308 <p>
 309                   </p>
 310                 </td>
 311 <td>
 312                   <p>
 313                     Set a coordinate.
 314                   </p>
 315                 </td>
 316 <td>
 317                   <p>
 318                     <span class="bold"><strong>CoordinateType const &amp;</strong></span>:
 319                     <span class="emphasis"><em>value</em></span>: value to set
 320                   </p>
 321                 </td>
 322 <td>
 323                 </td>
 324 </tr>
 325 </tbody>
 326 </table></div>
 327 <h6>
 328 <a name="geometry.reference.models.model_point.h6"></a>
 329           <span class="phrase"><a name="geometry.reference.models.model_point.header"></a></span><a class="link" href="model_point.html#geometry.reference.models.model_point.header">Header</a>
 330         </h6>
 331 <p>
 332           Either
 333         </p>
 334 <p>
 335           <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">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></code>
 336         </p>
 337 <p>
 338           Or
 339         </p>
 340 <p>
 341           <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">geometries</span><span class="special">/</span><span class="identifier">point</span><span class="special">.</span><span class="identifier">hpp</span><span class="special">&gt;</span></code>
 342         </p>
 343 <h6>
 344 <a name="geometry.reference.models.model_point.h7"></a>
 345           <span class="phrase"><a name="geometry.reference.models.model_point.examples"></a></span><a class="link" href="model_point.html#geometry.reference.models.model_point.examples">Examples</a>
 346         </h6>
 347 <p>
 348           Declaration and use of the Boost.Geometry model::point, modelling the Point
 349           Concept
 350         </p>
 351 <p>
 352 </p>
 353 <pre class="programlisting"><span class="preprocessor">#include</span> <span class="special">&lt;</span><span class="identifier">iostream</span><span class="special">&gt;</span>
 354 <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>
 355
 356 <span class="keyword">namespace</span> <span class="identifier">bg</span> <span class="special">=</span> <span class="identifier">boost</span><span class="special">::</span><span class="identifier">geometry</span><span class="special">;</span>
 357
 358 <span class="keyword">int</span> <span class="identifier">main</span><span class="special">()</span>
 359 <span class="special">{</span>
 360     <span class="identifier">bg</span><span class="special">::</span><span class="identifier">model</span><span class="special">::</span><span class="identifier">point</span><span class="special">&lt;</span><span class="keyword">double</span><span class="special">,</span> <span class="number">2</span><span class="special">,</span> <span class="identifier">bg</span><span class="special">::</span><span class="identifier">cs</span><span class="special">::</span><span class="identifier">cartesian</span><span class="special">&gt;</span> <span class="identifier">point1</span><span class="special">;</span>
 361     <span class="identifier">bg</span><span class="special">::</span><span class="identifier">model</span><span class="special">::</span><span class="identifier">point</span><span class="special">&lt;</span><span class="keyword">double</span><span class="special">,</span> <span class="number">3</span><span class="special">,</span> <span class="identifier">bg</span><span class="special">::</span><span class="identifier">cs</span><span class="special">::</span><span class="identifier">cartesian</span><span class="special">&gt;</span> <span class="identifier">point2</span><span class="special">(</span><span class="number">1.0</span><span class="special">,</span> <span class="number">2.0</span><span class="special">,</span> <span class="number">3.0</span><span class="special">);</span> <a class="co" name="geometry.reference.models.model_point.c0" href="model_point.html#geometry.reference.models.model_point.c1"><img src="../../../../../../../doc/src/images/callouts/1.png" alt="1" border="0"></a>
 362
 363     <span class="identifier">bg</span><span class="special">::</span><span class="identifier">set</span><span class="special">&lt;</span><span class="number">0</span><span class="special">&gt;(</span><span class="identifier">point1</span><span class="special">,</span> <span class="number">1.0</span><span class="special">);</span> <a class="co" name="geometry.reference.models.model_point.c2" href="model_point.html#geometry.reference.models.model_point.c3"><img src="../../../../../../../doc/src/images/callouts/2.png" alt="2" border="0"></a>
 364     <span class="identifier">point1</span><span class="special">.</span><span class="identifier">set</span><span class="special">&lt;</span><span class="number">1</span><span class="special">&gt;(</span><span class="number">2.0</span><span class="special">);</span> <a class="co" name="geometry.reference.models.model_point.c4" href="model_point.html#geometry.reference.models.model_point.c5"><img src="../../../../../../../doc/src/images/callouts/3.png" alt="3" border="0"></a>
 365
 366     <span class="keyword">double</span> <span class="identifier">x</span> <span class="special">=</span> <span class="identifier">bg</span><span class="special">::</span><span class="identifier">get</span><span class="special">&lt;</span><span class="number">0</span><span class="special">&gt;(</span><span class="identifier">point1</span><span class="special">);</span> <a class="co" name="geometry.reference.models.model_point.c6" href="model_point.html#geometry.reference.models.model_point.c7"><img src="../../../../../../../doc/src/images/callouts/4.png" alt="4" border="0"></a>
 367     <span class="keyword">double</span> <span class="identifier">y</span> <span class="special">=</span> <span class="identifier">point1</span><span class="special">.</span><span class="identifier">get</span><span class="special">&lt;</span><span class="number">1</span><span class="special">&gt;();</span> <a class="co" name="geometry.reference.models.model_point.c8" href="model_point.html#geometry.reference.models.model_point.c9"><img src="../../../../../../../doc/src/images/callouts/5.png" alt="5" border="0"></a>
 368
 369     <span class="identifier">std</span><span class="special">::</span><span class="identifier">cout</span> <span class="special">&lt;&lt;</span> <span class="identifier">x</span> <span class="special">&lt;&lt;</span> <span class="string">", "</span> <span class="special">&lt;&lt;</span> <span class="identifier">y</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>
 370     <span class="keyword">return</span> <span class="number">0</span><span class="special">;</span>
 371 <span class="special">}</span>
 372 </pre>
 373 <p>
 374         </p>
 375 <div class="calloutlist"><table border="0" summary="Callout list">
 376 <tr>
 377 <td width="5%" valign="top" align="left"><p><a name="geometry.reference.models.model_point.c1"></a><a href="#geometry.reference.models.model_point.c0"><img src="../../../../../../../doc/src/images/callouts/1.png" alt="1" border="0"></a> </p></td>
 378 <td valign="top" align="left"><p>
 379               Construct, assigning three coordinates
 380             </p></td>
 381 </tr>
 382 <tr>
 383 <td width="5%" valign="top" align="left"><p><a name="geometry.reference.models.model_point.c3"></a><a href="#geometry.reference.models.model_point.c2"><img src="../../../../../../../doc/src/images/callouts/2.png" alt="2" border="0"></a> </p></td>
 384 <td valign="top" align="left"><p>
 385               Set a coordinate, generic.
 386             </p></td>
 387 </tr>
 388 <tr>
 389 <td width="5%" valign="top" align="left"><p><a name="geometry.reference.models.model_point.c5"></a><a href="#geometry.reference.models.model_point.c4"><img src="../../../../../../../doc/src/images/callouts/3.png" alt="3" border="0"></a> </p></td>
 390 <td valign="top" align="left"><p>
 391               Set a coordinate, class-specific (<span class="bold"><strong>Note</strong></span>:
 392               prefer <code class="computeroutput"><span class="identifier">bg</span><span class="special">::</span><span class="identifier">set</span><span class="special">()</span></code>).
 393             </p></td>
 394 </tr>
 395 <tr>
 396 <td width="5%" valign="top" align="left"><p><a name="geometry.reference.models.model_point.c7"></a><a href="#geometry.reference.models.model_point.c6"><img src="../../../../../../../doc/src/images/callouts/4.png" alt="4" border="0"></a> </p></td>
 397 <td valign="top" align="left"><p>
 398               Get a coordinate, generic.
 399             </p></td>
 400 </tr>
 401 <tr>
 402 <td width="5%" valign="top" align="left"><p><a name="geometry.reference.models.model_point.c9"></a><a href="#geometry.reference.models.model_point.c8"><img src="../../../../../../../doc/src/images/callouts/5.png" alt="5" border="0"></a> </p></td>
 403 <td valign="top" align="left"><p>
 404               Get a coordinate, class-specific (<span class="bold"><strong>Note</strong></span>:
 405               prefer <code class="computeroutput"><span class="identifier">bg</span><span class="special">::</span><span class="identifier">get</span><span class="special">()</span></code>).
 406             </p></td>
 407 </tr>
 408 </table></div>
 409 <p>
 410           Output:
 411         </p>
 412 <pre class="programlisting">1, 2
 413 </pre>
 414 <h6>
 415 <a name="geometry.reference.models.model_point.h8"></a>
 416           <span class="phrase"><a name="geometry.reference.models.model_point.notes"></a></span><a class="link" href="model_point.html#geometry.reference.models.model_point.notes">Notes</a>
 417         </h6>
 418 <div class="note"><table border="0" summary="Note">
 419 <tr>
 420 <td rowspan="2" align="center" valign="top" width="25"><img alt="[Note]" src="../../../../../../../doc/src/images/note.png"></td>
 421 <th align="left">Note</th>
 422 </tr>
 423 <tr><td align="left" valign="top"><p>
 424             Coordinates are not initialized. If the constructor with parameters is
 425             not called and points are not assigned using <code class="computeroutput"><span class="identifier">set</span></code>
 426             or <code class="computeroutput"><span class="identifier">assign</span></code> then the coordinate
 427             values will contain garbage
 428           </p></td></tr>
 429 </table></div>
 430 </div>
 431 <table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr>
 432 <td align="left"></td>
 433 <td align="right"><div class="copyright-footer">Copyright &#169; 2009-2017 Barend
 434       Gehrels, Bruno Lalande, Mateusz Loskot, Adam Wulkiewicz, Oracle and/or its
 435       affiliates<p>
 436         Distributed under the Boost Software License, Version 1.0. (See accompanying
 437         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>)
 438       </p>
 439 </div></td>
 440 </tr></table>
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