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<title>transform (with strategy)</title>
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<div class="titlepage"><div><div><h5 class="title">
<a name="geometry.reference.algorithms.transform.transform_3_with_strategy"></a><a class="link" href="transform_3_with_strategy.html" title="transform (with strategy)">transform
(with strategy)</a>
</h5></div></div></div>
<p>
<a class="indexterm" name="idp118472176"></a>
Transforms from one geometry to another geometry using the specified
strategy.
</p>
<h6>
<a name="geometry.reference.algorithms.transform.transform_3_with_strategy.h0"></a>
<span class="phrase"><a name="geometry.reference.algorithms.transform.transform_3_with_strategy.synopsis"></a></span><a class="link" href="transform_3_with_strategy.html#geometry.reference.algorithms.transform.transform_3_with_strategy.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">Geometry1</span><span class="special">,</span> <span class="keyword">typename</span> <span class="identifier">Geometry2</span><span class="special">,</span> <span class="keyword">typename</span> <span class="identifier">Strategy</span><span class="special">&gt;</span>
<span class="keyword">bool</span> <span class="identifier">transform</span><span class="special">(</span><span class="identifier">Geometry1</span> <span class="keyword">const</span> <span class="special">&amp;</span> <span class="identifier">geometry1</span><span class="special">,</span> <span class="identifier">Geometry2</span> <span class="special">&amp;</span> <span class="identifier">geometry2</span><span class="special">,</span> <span class="identifier">Strategy</span> <span class="keyword">const</span> <span class="special">&amp;</span> <span class="identifier">strategy</span><span class="special">)</span></pre>
<p>
</p>
<h6>
<a name="geometry.reference.algorithms.transform.transform_3_with_strategy.h1"></a>
<span class="phrase"><a name="geometry.reference.algorithms.transform.transform_3_with_strategy.parameters"></a></span><a class="link" href="transform_3_with_strategy.html#geometry.reference.algorithms.transform.transform_3_with_strategy.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>
Geometry1 const &amp;
</p>
</td>
<td>
<p>
Any type fulfilling a Geometry Concept
</p>
</td>
<td>
<p>
geometry1
</p>
</td>
<td>
<p>
A model of the specified concept
</p>
</td>
</tr>
<tr>
<td>
<p>
Geometry2 &amp;
</p>
</td>
<td>
<p>
Any type fulfilling a Geometry Concept
</p>
</td>
<td>
<p>
geometry2
</p>
</td>
<td>
<p>
A model of the specified concept
</p>
</td>
</tr>
<tr>
<td>
<p>
Strategy const &amp;
</p>
</td>
<td>
<p>
strategy
</p>
</td>
<td>
<p>
strategy
</p>
</td>
<td>
<p>
The strategy to be used for transformation
</p>
</td>
</tr>
</tbody>
</table></div>
<h6>
<a name="geometry.reference.algorithms.transform.transform_3_with_strategy.h2"></a>
<span class="phrase"><a name="geometry.reference.algorithms.transform.transform_3_with_strategy.returns"></a></span><a class="link" href="transform_3_with_strategy.html#geometry.reference.algorithms.transform.transform_3_with_strategy.returns">Returns</a>
</h6>
<p>
True if the transformation could be done
</p>
<h6>
<a name="geometry.reference.algorithms.transform.transform_3_with_strategy.h3"></a>
<span class="phrase"><a name="geometry.reference.algorithms.transform.transform_3_with_strategy.header"></a></span><a class="link" href="transform_3_with_strategy.html#geometry.reference.algorithms.transform.transform_3_with_strategy.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">algorithms</span><span class="special">/</span><span class="identifier">transform</span><span class="special">.</span><span class="identifier">hpp</span><span class="special">&gt;</span></code>
</p>
<h6>
<a name="geometry.reference.algorithms.transform.transform_3_with_strategy.h4"></a>
<span class="phrase"><a name="geometry.reference.algorithms.transform.transform_3_with_strategy.complexity"></a></span><a class="link" href="transform_3_with_strategy.html#geometry.reference.algorithms.transform.transform_3_with_strategy.complexity">Complexity</a>
</h6>
<p>
Linear
</p>
<h6>
<a name="geometry.reference.algorithms.transform.transform_3_with_strategy.h5"></a>
<span class="phrase"><a name="geometry.reference.algorithms.transform.transform_3_with_strategy.example"></a></span><a class="link" href="transform_3_with_strategy.html#geometry.reference.algorithms.transform.transform_3_with_strategy.example">Example</a>
</h6>
<p>
Shows how points can be scaled, translated or rotated
</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="keyword">int</span> <span class="identifier">main</span><span class="special">()</span>
<span class="special">{</span>
<span class="keyword">namespace</span> <span class="identifier">trans</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="identifier">strategy</span><span class="special">::</span><span class="identifier">transform</span><span class="special">;</span>
<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">dsv</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">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">boost</span><span class="special">::</span><span class="identifier">geometry</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">point_type</span><span class="special">;</span>
<span class="identifier">point_type</span> <span class="identifier">p1</span><span class="special">(</span><span class="number">1.0</span><span class="special">,</span> <span class="number">1.0</span><span class="special">);</span>
<span class="comment">// Translate over (1.5, 1.5)</span>
<span class="identifier">point_type</span> <span class="identifier">p2</span><span class="special">;</span>
<span class="identifier">trans</span><span class="special">::</span><span class="identifier">translate_transformer</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="number">2</span><span class="special">&gt;</span> <span class="identifier">translate</span><span class="special">(</span><span class="number">1.5</span><span class="special">,</span> <span class="number">1.5</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="identifier">transform</span><span class="special">(</span><span class="identifier">p1</span><span class="special">,</span> <span class="identifier">p2</span><span class="special">,</span> <span class="identifier">translate</span><span class="special">);</span>
<span class="comment">// Scale with factor 3.0</span>
<span class="identifier">point_type</span> <span class="identifier">p3</span><span class="special">;</span>
<span class="identifier">trans</span><span class="special">::</span><span class="identifier">scale_transformer</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="number">2</span><span class="special">&gt;</span> <span class="identifier">scale</span><span class="special">(</span><span class="number">3.0</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="identifier">transform</span><span class="special">(</span><span class="identifier">p1</span><span class="special">,</span> <span class="identifier">p3</span><span class="special">,</span> <span class="identifier">scale</span><span class="special">);</span>
<span class="comment">// Rotate with respect to the origin (0,0) over 90 degrees (clockwise)</span>
<span class="identifier">point_type</span> <span class="identifier">p4</span><span class="special">;</span>
<span class="identifier">trans</span><span class="special">::</span><span class="identifier">rotate_transformer</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">degree</span><span class="special">,</span> <span class="keyword">double</span><span class="special">,</span> <span class="number">2</span><span class="special">,</span> <span class="number">2</span><span class="special">&gt;</span> <span class="identifier">rotate</span><span class="special">(</span><span class="number">90.0</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="identifier">transform</span><span class="special">(</span><span class="identifier">p1</span><span class="special">,</span> <span class="identifier">p4</span><span class="special">,</span> <span class="identifier">rotate</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">"p1: "</span> <span class="special">&lt;&lt;</span> <span class="identifier">dsv</span><span class="special">(</span><span class="identifier">p1</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">&lt;&lt;</span> <span class="string">"p2: "</span> <span class="special">&lt;&lt;</span> <span class="identifier">dsv</span><span class="special">(</span><span class="identifier">p2</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">&lt;&lt;</span> <span class="string">"p3: "</span> <span class="special">&lt;&lt;</span> <span class="identifier">dsv</span><span class="special">(</span><span class="identifier">p3</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">&lt;&lt;</span> <span class="string">"p4: "</span> <span class="special">&lt;&lt;</span> <span class="identifier">dsv</span><span class="special">(</span><span class="identifier">p4</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">p1: (1, 1)
p2: (2.5, 2.5)
p3: (3, 3)
p4: (1, -1)
</pre>
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