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<div class="titlepage"><div><div><h5 class="title">
<a name="geometry.reference.algorithms.assign.assign_points"></a><a class="link" href="assign_points.html" title="assign_points">assign_points</a>
</h5></div></div></div>
<p>
<a class="indexterm" name="id827831"></a>
Assign a range of points to a linestring, ring or polygon.
</p>
<a name="geometry.reference.algorithms.assign.assign_points.synopsis"></a><h6>
<a name="geometry.reference.algorithms.assign.assign_points.synopsis-heading"></a>
<a class="link" href="assign_points.html#geometry.reference.algorithms.assign.assign_points.synopsis">Synopsis</a>
</h6>
<p>
</p>
<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">Range</span><span class="special">&gt;</span>
<span class="keyword">void</span> <span class="identifier">assign_points</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">Range</span> <span class="keyword">const</span> <span class="special">&amp;</span> <span class="identifier">range</span><span class="special">)</span></pre>
<p>
</p>
<a name="geometry.reference.algorithms.assign.assign_points.parameters"></a><h6>
<a name="geometry.reference.algorithms.assign.assign_points.parameters-heading"></a>
<a class="link" href="assign_points.html#geometry.reference.algorithms.assign.assign_points.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>
Geometry &amp;
</p>
</td>
<td>
<p>
Any type fulfilling a Geometry Concept
</p>
</td>
<td>
<p>
geometry
</p>
</td>
<td>
<p>
A model of the specified concept
</p>
</td>
</tr>
<tr>
<td>
<p>
Range const &amp;
</p>
</td>
<td>
<p>
Any type fulfilling a Range Concept where it range_value type
fulfills the Point Concept
</p>
</td>
<td>
<p>
range
</p>
</td>
<td>
<p>
A range containg points fulfilling range and point concepts
</p>
</td>
</tr>
</tbody>
</table></div>
<a name="geometry.reference.algorithms.assign.assign_points.header"></a><h6>
<a name="geometry.reference.algorithms.assign.assign_points.header-heading"></a>
<a class="link" href="assign_points.html#geometry.reference.algorithms.assign.assign_points.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">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">algorithms</span><span class="special">/</span><span class="identifier">assign</span><span class="special">.</span><span class="identifier">hpp</span><span class="special">&gt;</span></code>
</p>
<a name="geometry.reference.algorithms.assign.assign_points.notes"></a><h6>
<a name="geometry.reference.algorithms.assign.assign_points.notes-heading"></a>
<a class="link" href="assign_points.html#geometry.reference.algorithms.assign.assign_points.notes">Notes</a>
</h6>
<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>
Assign automatically clears the geometry before assigning (use append
if you don't want that)
</p></td></tr>
</table></div>
<a name="geometry.reference.algorithms.assign.assign_points.example"></a><h6>
<a name="geometry.reference.algorithms.assign.assign_points.example-heading"></a>
<a class="link" href="assign_points.html#geometry.reference.algorithms.assign.assign_points.example">Example</a>
</h6>
<p>
Shows usage of Boost.Geometry's assign, Boost.Assign, and Boost.Range
to assign ranges of a linestring
</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">linestring</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">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>
<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>
<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_range</span><span class="special">/</span><span class="identifier">filtered</span><span class="special">.</span><span class="identifier">hpp</span><span class="special">&gt;</span>
<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>
<span class="keyword">template</span> <span class="special">&lt;</span><span class="keyword">typename</span> <span class="identifier">T</span><span class="special">&gt;</span>
<span class="keyword">struct</span> <span class="identifier">x_between</span>
<span class="special">{</span>
<span class="identifier">x_between</span><span class="special">(</span><span class="identifier">T</span> <span class="identifier">a</span><span class="special">,</span> <span class="identifier">T</span> <span class="identifier">b</span><span class="special">)</span>
<span class="special">:</span> <span class="identifier">fa</span><span class="special">(</span><span class="identifier">a</span><span class="special">),</span> <span class="identifier">fb</span><span class="special">(</span><span class="identifier">b</span><span class="special">)</span>
<span class="special">{}</span>
<span class="keyword">template</span> <span class="special">&lt;</span><span class="keyword">typename</span> <span class="identifier">P</span><span class="special">&gt;</span>
<span class="keyword">bool</span> <span class="keyword">operator</span><span class="special">()(</span><span class="identifier">P</span> <span class="keyword">const</span><span class="special">&amp;</span> <span class="identifier">p</span><span class="special">)</span> <span class="keyword">const</span>
<span class="special">{</span>
<span class="keyword">return</span> <span class="identifier">boost</span><span class="special">::</span><span class="identifier">geometry</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">p</span><span class="special">)</span> <span class="special">&gt;=</span> <span class="identifier">fa</span>
<span class="special">&amp;&amp;</span> <span class="identifier">boost</span><span class="special">::</span><span class="identifier">geometry</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">p</span><span class="special">)</span> <span class="special">&lt;=</span> <span class="identifier">fb</span><span class="special">;</span>
<span class="special">}</span>
<span class="keyword">private</span> <span class="special">:</span>
<span class="identifier">T</span> <span class="identifier">fa</span><span class="special">,</span> <span class="identifier">fb</span><span class="special">;</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="keyword">using</span> <span class="keyword">namespace</span> <span class="identifier">boost</span><span class="special">::</span><span class="identifier">assign</span><span class="special">;</span>
<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">linestring</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">ls</span><span class="special">;</span>
<span class="identifier">ls</span> <span class="identifier">line1</span><span class="special">,</span> <span class="identifier">line2</span><span class="special">,</span> <span class="identifier">line3</span><span class="special">;</span>
<span class="identifier">line1</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">2</span><span class="special">,</span> <span class="number">3</span><span class="special">)(</span><span class="number">4</span><span class="special">,</span> <span class="number">0</span><span class="special">)(</span><span class="number">6</span><span class="special">,</span> <span class="number">3</span><span class="special">)(</span><span class="number">8</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">3</span><span class="special">)(</span><span class="number">12</span><span class="special">,</span> <span class="number">0</span><span class="special">);</span> <a class="co" name="geometry6co" href="assign_points.html#geometry6"><img src="../../../../../../../../doc/src/images/callouts/1.png" alt="1" border="0"></a>
<span class="identifier">boost</span><span class="special">::</span><span class="identifier">geometry</span><span class="special">::</span><span class="identifier">assign_points</span><span class="special">(</span><span class="identifier">line2</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">2</span><span class="special">,</span> <span class="number">2</span><span class="special">)(</span><span class="number">4</span><span class="special">,</span> <span class="number">0</span><span class="special">)(</span><span class="number">6</span><span class="special">,</span> <span class="number">2</span><span class="special">)(</span><span class="number">8</span><span class="special">,</span> <span class="number">0</span><span class="special">));</span> <a class="co" name="geometry7co" href="assign_points.html#geometry7"><img src="../../../../../../../../doc/src/images/callouts/2.png" alt="2" border="0"></a>
<span class="identifier">boost</span><span class="special">::</span><span class="identifier">geometry</span><span class="special">::</span><span class="identifier">assign_points</span><span class="special">(</span><span class="identifier">line3</span><span class="special">,</span> <span class="identifier">line1</span> <span class="special">|</span> <span class="identifier">boost</span><span class="special">::</span><span class="identifier">adaptors</span><span class="special">::</span><span class="identifier">filtered</span><span class="special">(</span><span class="identifier">x_between</span><span class="special">&lt;</span><span class="keyword">int</span><span class="special">&gt;(</span><span class="number">4</span><span class="special">,</span> <span class="number">8</span><span class="special">)));</span> <a class="co" name="geometry8co" href="assign_points.html#geometry8"><img src="../../../../../../../../doc/src/images/callouts/3.png" alt="3" border="0"></a>
<span class="identifier">std</span><span class="special">::</span><span class="identifier">cout</span> <span class="special">&lt;&lt;</span> <span class="string">"line 1: "</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">line1</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="identifier">std</span><span class="special">::</span><span class="identifier">cout</span> <span class="special">&lt;&lt;</span> <span class="string">"line 2: "</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">line2</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="identifier">std</span><span class="special">::</span><span class="identifier">cout</span> <span class="special">&lt;&lt;</span> <span class="string">"line 3: "</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">line3</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>
<div class="calloutlist"><table border="0" summary="Callout list">
<tr>
<td width="5%" valign="top" align="left"><p><a name="geometry6"></a><a href="#geometry6co"><img src="../../../../../../../../doc/src/images/callouts/1.png" alt="1" border="0"></a> </p></td>
<td valign="top" align="left"><p>
tuple_list_of is part of Boost.Assign and can be used for Boost.Geometry
if points are tuples
</p></td>
</tr>
<tr>
<td width="5%" valign="top" align="left"><p><a name="geometry7"></a><a href="#geometry7co"><img src="../../../../../../../../doc/src/images/callouts/2.png" alt="2" border="0"></a> </p></td>
<td valign="top" align="left"><p>
tuple_list_of delivers a range and can therefore be used in boost::geometry::assign
</p></td>
</tr>
<tr>
<td width="5%" valign="top" align="left"><p><a name="geometry8"></a><a href="#geometry8co"><img src="../../../../../../../../doc/src/images/callouts/3.png" alt="3" border="0"></a> </p></td>
<td valign="top" align="left"><p>
Boost.Range adaptors can also be used in boost::geometry::assign
</p></td>
</tr>
</table></div>
<p>
Output:
</p>
<pre class="programlisting">line 1: ((0, 0), (2, 3), (4, 0), (6, 3), (8, 0), (10, 3), (12, 0))
line 2: ((0, 0), (2, 2), (4, 0), (6, 2), (8, 0))
line 3: ((4, 0), (6, 3), (8, 0))
</pre>
<a name="geometry.reference.algorithms.assign.assign_points.see_also"></a><h6>
<a name="geometry.reference.algorithms.assign.assign_points.see_also-heading"></a>
<a class="link" href="assign_points.html#geometry.reference.algorithms.assign.assign_points.see_also">See
also</a>
</h6>
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<td align="right"><div class="copyright-footer">Copyright &#169; 2011 Barend Gehrels, Bruno Lalande, Mateusz Loskot<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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