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<div class="titlepage"><div><div><h5 class="title">
<a name="geometry.reference.access.set.set_2"></a><a class="link" href="set_2.html" title="set">set</a>
</h5></div></div></div>
<p>
<a class="indexterm" name="idp101678848"></a>
Set coordinate value of a geometry (usually a point)
</p>
<h6>
<a name="geometry.reference.access.set.set_2.h0"></a>
<span class="phrase"><a name="geometry.reference.access.set.set_2.description"></a></span><a class="link" href="set_2.html#geometry.reference.access.set.set_2.description">Description</a>
</h6>
<p>
The free functions <span class="bold"><strong>get</strong></span> and <span class="bold"><strong>set</strong></span> are two of the most important functions of
Boost.Geometry, both within the library, as also for the library user.
With these two functions you normally get and set coordinate values from
and for a point, box, segment or sphere.
</p>
<h6>
<a name="geometry.reference.access.set.set_2.h1"></a>
<span class="phrase"><a name="geometry.reference.access.set.set_2.synopsis"></a></span><a class="link" href="set_2.html#geometry.reference.access.set.set_2.synopsis">Synopsis</a>
</h6>
<p>
</p>
<pre class="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">Dimension</span><span class="special">,</span> <span class="keyword">typename</span> <span class="identifier">Geometry</span><span class="special">&gt;</span>
<span class="keyword">void</span> <span class="identifier">set</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="keyword">typename</span> <span class="identifier">coordinate_type</span><span class="special">&lt;</span> <span class="identifier">Geometry</span> <span class="special">&gt;::</span><span class="identifier">type</span> <span class="keyword">const</span> <span class="special">&amp;</span> <span class="identifier">value</span><span class="special">)</span></pre>
<p>
</p>
<h6>
<a name="geometry.reference.access.set.set_2.h2"></a>
<span class="phrase"><a name="geometry.reference.access.set.set_2.parameters"></a></span><a class="link" href="set_2.html#geometry.reference.access.set.set_2.parameters">Parameters</a>
</h6>
<div class="informaltable"><table class="table">
<colgroup>
<col>
<col>
<col>
<col>
</colgroup>
<thead><tr>
<th>
<p>
Type
</p>
</th>
<th>
<p>
Concept
</p>
</th>
<th>
<p>
Name
</p>
</th>
<th>
<p>
Description
</p>
</th>
</tr></thead>
<tbody>
<tr>
<td>
<p>
Dimension
</p>
</td>
<td>
<p>
Dimension, this template parameter is required. Should contain
[0 .. n-1] for an n-dimensional geometry
</p>
</td>
<td>
<p>
-
</p>
</td>
<td>
<p>
Must be specified
</p>
</td>
</tr>
<tr>
<td>
<p>
Geometry &amp;
</p>
</td>
<td>
<p>
Any type fulfilling a Geometry Concept (usually a Point Concept)
</p>
</td>
<td>
<p>
geometry
</p>
</td>
<td>
<p>
A model of the specified concept (usually a point)
</p>
</td>
</tr>
<tr>
<td>
<p>
typename coordinate_type&lt; Geometry &gt;::type const &amp;
</p>
</td>
<td>
</td>
<td>
<p>
value
</p>
</td>
<td>
<p>
The coordinate value to set
</p>
</td>
</tr>
</tbody>
</table></div>
<h6>
<a name="geometry.reference.access.set.set_2.h3"></a>
<span class="phrase"><a name="geometry.reference.access.set.set_2.header"></a></span><a class="link" href="set_2.html#geometry.reference.access.set.set_2.header">Header</a>
</h6>
<p>
Either
</p>
<p>
<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>
</p>
<p>
Or
</p>
<p>
<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">core</span><span class="special">/</span><span class="identifier">access</span><span class="special">.</span><span class="identifier">hpp</span><span class="special">&gt;</span></code>
</p>
<div class="note"><table border="0" summary="Note">
<tr>
<td rowspan="2" align="center" valign="top" width="25"><img alt="[Note]" src="../../../../../../../../doc/src/images/note.png"></td>
<th align="left">Note</th>
</tr>
<tr><td align="left" valign="top"><p>
If you host both the std:: library namespace and boost::geometry::
namespace set might become ambiguous, std::set is a collection. So
don't do that or refer to geometry::set then explicitly.
</p></td></tr>
</table></div>
<h6>
<a name="geometry.reference.access.set.set_2.h4"></a>
<span class="phrase"><a name="geometry.reference.access.set.set_2.behavior"></a></span><a class="link" href="set_2.html#geometry.reference.access.set.set_2.behavior">Behavior</a>
</h6>
<div class="informaltable"><table class="table">
<colgroup>
<col>
<col>
</colgroup>
<thead><tr>
<th>
<p>
Case
</p>
</th>
<th>
<p>
Behavior
</p>
</th>
</tr></thead>
<tbody>
<tr>
<td>
<p>
Point
</p>
</td>
<td>
<p>
Sets the coordinate of a point
</p>
</td>
</tr>
<tr>
<td>
<p>
Circle or Sphere
</p>
</td>
<td>
<p>
Sets the coordinate of the center of a circle or sphere (currently
in an extension)
</p>
</td>
</tr>
<tr>
<td>
<p>
Spherical
</p>
</td>
<td>
<p>
Sets the coordinate of a point, in either Radian's or Degree's,
depending on specified units
</p>
</td>
</tr>
</tbody>
</table></div>
<h6>
<a name="geometry.reference.access.set.set_2.h5"></a>
<span class="phrase"><a name="geometry.reference.access.set.set_2.complexity"></a></span><a class="link" href="set_2.html#geometry.reference.access.set.set_2.complexity">Complexity</a>
</h6>
<p>
Constant
</p>
<h6>
<a name="geometry.reference.access.set.set_2.h6"></a>
<span class="phrase"><a name="geometry.reference.access.set.set_2.example"></a></span><a class="link" href="set_2.html#geometry.reference.access.set.set_2.example">Example</a>
</h6>
<p>
Set the coordinate of a point
</p>
<p>
</p>
<pre class="programlisting"><span class="preprocessor">#include</span> <span class="special">&lt;</span><span class="identifier">iostream</span><span class="special">&gt;</span>
<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>
<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>
<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>
<span class="keyword">int</span> <span class="identifier">main</span><span class="special">()</span>
<span class="special">{</span>
<span class="identifier">bg</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="keyword">double</span><span class="special">&gt;</span> <span class="identifier">point</span><span class="special">;</span>
<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">point</span><span class="special">,</span> <span class="number">1</span><span class="special">);</span>
<span class="identifier">bg</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="identifier">point</span><span class="special">,</span> <span class="number">2</span><span class="special">);</span>
<span class="identifier">std</span><span class="special">::</span><span class="identifier">cout</span> <span class="special">&lt;&lt;</span> <span class="string">"Location: "</span> <span class="special">&lt;&lt;</span> <span class="identifier">bg</span><span class="special">::</span><span class="identifier">dsv</span><span class="special">(</span><span class="identifier">point</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>
<span class="keyword">return</span> <span class="number">0</span><span class="special">;</span>
<span class="special">}</span>
</pre>
<p>
</p>
<p>
Output:
</p>
<pre class="programlisting">Location: (1, 2)
</pre>
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Mateusz Loskot, Adam Wulkiewicz, Oracle and/or its affiliates<p>
Distributed under the Boost Software License, Version 1.0. (See accompanying
file LICENSE_1_0.txt or copy at <a href="http://www.boost.org/LICENSE_1_0.txt" target="_top">http://www.boost.org/LICENSE_1_0.txt</a>)
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