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| <div class="section"> |
| <div class="titlepage"><div><div><h5 class="title"> |
| <a name="geometry.reference.algorithms.transform.transform_2"></a><a class="link" href="transform_2.html" title="transform">transform</a> |
| </h5></div></div></div> |
| <p> |
| <a class="indexterm" name="id896598"></a> |
| Transforms from one geometry to another geometry using a strategy. |
| </p> |
| <a name="geometry.reference.algorithms.transform.transform_2.synopsis"></a><h6> |
| <a name="geometry.reference.algorithms.transform.transform_2.synopsis-heading"></a> |
| <a class="link" href="transform_2.html#geometry.reference.algorithms.transform.transform_2.synopsis">Synopsis</a> |
| </h6> |
| <p> |
| |
| </p> |
| <pre class="programlisting"><span class="keyword">template</span><span class="special"><</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">bool</span> <span class="identifier">transform</span><span class="special">(</span><span class="identifier">Geometry1</span> <span class="keyword">const</span> <span class="special">&</span> <span class="identifier">geometry1</span><span class="special">,</span> <span class="identifier">Geometry2</span> <span class="special">&</span> <span class="identifier">geometry2</span><span class="special">)</span></pre> |
| <p> |
| </p> |
| <a name="geometry.reference.algorithms.transform.transform_2.parameters"></a><h6> |
| <a name="geometry.reference.algorithms.transform.transform_2.parameters-heading"></a> |
| <a class="link" href="transform_2.html#geometry.reference.algorithms.transform.transform_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> |
| Geometry1 const & |
| </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 & |
| </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> |
| </tbody> |
| </table></div> |
| <a name="geometry.reference.algorithms.transform.transform_2.returns"></a><h6> |
| <a name="geometry.reference.algorithms.transform.transform_2.returns-heading"></a> |
| <a class="link" href="transform_2.html#geometry.reference.algorithms.transform.transform_2.returns">Returns</a> |
| </h6> |
| <p> |
| True if the transformation could be done |
| </p> |
| <a name="geometry.reference.algorithms.transform.transform_2.header"></a><h6> |
| <a name="geometry.reference.algorithms.transform.transform_2.header-heading"></a> |
| <a class="link" href="transform_2.html#geometry.reference.algorithms.transform.transform_2.header">Header</a> |
| </h6> |
| <p> |
| Either |
| </p> |
| <p> |
| <code class="computeroutput"><span class="preprocessor">#include</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">geometry</span><span class="special">.</span><span class="identifier">hpp</span><span class="special">></span></code> |
| </p> |
| <p> |
| Or |
| </p> |
| <p> |
| <code class="computeroutput"><span class="preprocessor">#include</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">algorithms</span><span class="special">/</span><span class="identifier">transform</span><span class="special">.</span><span class="identifier">hpp</span><span class="special">></span></code> |
| </p> |
| <a name="geometry.reference.algorithms.transform.transform_2.behavior"></a><h6> |
| <a name="geometry.reference.algorithms.transform.transform_2.behavior-heading"></a> |
| <a class="link" href="transform_2.html#geometry.reference.algorithms.transform.transform_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> |
| Spherical (degree) / Spherical (radian) |
| </p> |
| </td> |
| <td> |
| <p> |
| Transforms coordinates from degree to radian, or vice versa |
| </p> |
| </td> |
| </tr> |
| <tr> |
| <td> |
| <p> |
| Spherical / Cartesian (3D) |
| </p> |
| </td> |
| <td> |
| <p> |
| Transforms coordinates from spherical coordinates to X,Y,Z, |
| or vice versa, on a unit sphere |
| </p> |
| </td> |
| </tr> |
| <tr> |
| <td> |
| <p> |
| Spherical (degree, with radius) / Spherical (radian, with radius) |
| </p> |
| </td> |
| <td> |
| <p> |
| Transforms coordinates from degree to radian, or vice versa. |
| Third coordinate (radius) is untouched |
| </p> |
| </td> |
| </tr> |
| <tr> |
| <td> |
| <p> |
| Spherical (with radius) / Cartesian (3D) |
| </p> |
| </td> |
| <td> |
| <p> |
| Transforms coordinates from spherical coordinates to X,Y,Z, |
| or vice versa, on a unit sphere. Third coordinate (radius) |
| is taken into account |
| </p> |
| </td> |
| </tr> |
| </tbody> |
| </table></div> |
| <a name="geometry.reference.algorithms.transform.transform_2.complexity"></a><h6> |
| <a name="geometry.reference.algorithms.transform.transform_2.complexity-heading"></a> |
| <a class="link" href="transform_2.html#geometry.reference.algorithms.transform.transform_2.complexity">Complexity</a> |
| </h6> |
| <p> |
| Linear |
| </p> |
| <a name="geometry.reference.algorithms.transform.transform_2.example"></a><h6> |
| <a name="geometry.reference.algorithms.transform.transform_2.example-heading"></a> |
| <a class="link" href="transform_2.html#geometry.reference.algorithms.transform.transform_2.example">Example</a> |
| </h6> |
| <p> |
| Shows how points can be transformed using the default strategy |
| </p> |
| <p> |
| |
| </p> |
| <pre class="programlisting"><span class="preprocessor">#include</span> <span class="special"><</span><span class="identifier">iostream</span><span class="special">></span> |
| <span class="preprocessor">#include</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">hpp</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">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="comment">// Select a point near the pole (theta=5.0, phi=15.0)</span> |
| <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"><</span><span class="keyword">long</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">spherical</span><span class="special"><</span><span class="identifier">bg</span><span class="special">::</span><span class="identifier">degree</span><span class="special">></span> <span class="special">></span> <span class="identifier">p1</span><span class="special">(</span><span class="number">15.0</span><span class="special">,</span> <span class="number">5.0</span><span class="special">);</span> |
| |
| <span class="comment">// Transform from degree to radian. Default strategy is automatically selected,</span> |
| <span class="comment">// it will convert from degree to radian</span> |
| <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"><</span><span class="keyword">long</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">spherical</span><span class="special"><</span><span class="identifier">bg</span><span class="special">::</span><span class="identifier">radian</span><span class="special">></span> <span class="special">></span> <span class="identifier">p2</span><span class="special">;</span> |
| <span class="identifier">bg</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="comment">// Transform from degree (lon-lat) to 3D (x,y,z). Default strategy is automatically selected, </span> |
| <span class="comment">// it will consider points on a unit sphere</span> |
| <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"><</span><span class="keyword">long</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">></span> <span class="identifier">p3</span><span class="special">;</span> |
| <span class="identifier">bg</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">std</span><span class="special">::</span><span class="identifier">cout</span> |
| <span class="special"><<</span> <span class="string">"p1: "</span> <span class="special"><<</span> <span class="identifier">bg</span><span class="special">::</span><span class="identifier">dsv</span><span class="special">(</span><span class="identifier">p1</span><span class="special">)</span> <span class="special"><<</span> <span class="identifier">std</span><span class="special">::</span><span class="identifier">endl</span> |
| <span class="special"><<</span> <span class="string">"p2: "</span> <span class="special"><<</span> <span class="identifier">bg</span><span class="special">::</span><span class="identifier">dsv</span><span class="special">(</span><span class="identifier">p2</span><span class="special">)</span> <span class="special"><<</span> <span class="identifier">std</span><span class="special">::</span><span class="identifier">endl</span> |
| <span class="special"><<</span> <span class="string">"p3: "</span> <span class="special"><<</span> <span class="identifier">bg</span><span class="special">::</span><span class="identifier">dsv</span><span class="special">(</span><span class="identifier">p3</span><span class="special">)</span> <span class="special"><<</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: (15, 5) |
| p2: (0.261799, 0.0872665) |
| p3: (0.084186, 0.0225576, 0.996195) |
| </pre> |
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| <td align="right"><div class="copyright-footer">Copyright © 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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