| <html> |
| <head> |
| <meta http-equiv="Content-Type" content="text/html; charset=US-ASCII"> |
| <title>Boost.Fusion</title> |
| <link rel="stylesheet" href="../../../../../../../doc/src/boostbook.css" type="text/css"> |
| <meta name="generator" content="DocBook XSL Stylesheets V1.78.1"> |
| <link rel="home" href="../../../index.html" title="Chapter 1. Geometry"> |
| <link rel="up" href="../adapted.html" title="Adapted models"> |
| <link rel="prev" href="boost_array.html" title="Boost.Array"> |
| <link rel="next" href="boost_tuple.html" title="Boost.Tuple"> |
| </head> |
| <body bgcolor="white" text="black" link="#0000FF" vlink="#840084" alink="#0000FF"> |
| <table cellpadding="2" width="100%"><tr> |
| <td valign="top"><img alt="Boost C++ Libraries" width="277" height="86" src="../../../../../../../boost.png"></td> |
| <td align="center"><a href="../../../../../../../index.html">Home</a></td> |
| <td align="center"><a href="../../../../../../../libs/libraries.htm">Libraries</a></td> |
| <td align="center"><a href="http://www.boost.org/users/people.html">People</a></td> |
| <td align="center"><a href="http://www.boost.org/users/faq.html">FAQ</a></td> |
| <td align="center"><a href="../../../../../../../more/index.htm">More</a></td> |
| </tr></table> |
| <hr> |
| <div class="spirit-nav"> |
| <a accesskey="p" href="boost_array.html"><img src="../../../../../../../doc/src/images/prev.png" alt="Prev"></a><a accesskey="u" href="../adapted.html"><img src="../../../../../../../doc/src/images/up.png" alt="Up"></a><a accesskey="h" href="../../../index.html"><img src="../../../../../../../doc/src/images/home.png" alt="Home"></a><a accesskey="n" href="boost_tuple.html"><img src="../../../../../../../doc/src/images/next.png" alt="Next"></a> |
| </div> |
| <div class="section"> |
| <div class="titlepage"><div><div><h4 class="title"> |
| <a name="geometry.reference.adapted.boost_fusion"></a><a class="link" href="boost_fusion.html" title="Boost.Fusion">Boost.Fusion</a> |
| </h4></div></div></div> |
| <p> |
| Boost.Fusion adapted structs or classes are adapted to the Boost.Geometry |
| point concept |
| </p> |
| <h6> |
| <a name="geometry.reference.adapted.boost_fusion.h0"></a> |
| <span class="phrase"><a name="geometry.reference.adapted.boost_fusion.description"></a></span><a class="link" href="boost_fusion.html#geometry.reference.adapted.boost_fusion.description">Description</a> |
| </h6> |
| <p> |
| Boost.Fusion adapted structs are (optionally) adapted to the Boost.Geometry |
| point concept. They can therefore be used in many Boost.Geometry algorithms. |
| </p> |
| <h6> |
| <a name="geometry.reference.adapted.boost_fusion.h1"></a> |
| <span class="phrase"><a name="geometry.reference.adapted.boost_fusion.model_of"></a></span><a class="link" href="boost_fusion.html#geometry.reference.adapted.boost_fusion.model_of">Model |
| of</a> |
| </h6> |
| <p> |
| <a class="link" href="../concepts/concept_point.html" title="Point Concept">Point Concept</a> |
| </p> |
| <h6> |
| <a name="geometry.reference.adapted.boost_fusion.h2"></a> |
| <span class="phrase"><a name="geometry.reference.adapted.boost_fusion.header"></a></span><a class="link" href="boost_fusion.html#geometry.reference.adapted.boost_fusion.header">Header</a> |
| </h6> |
| <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">geometries</span><span class="special">/</span><span class="identifier">adapted</span><span class="special">/</span><span class="identifier">boost_fusion</span><span class="special">.</span><span class="identifier">hpp</span><span class="special">></span></code> |
| </p> |
| <p> |
| The standard header <code class="computeroutput"><span class="identifier">boost</span><span class="special">/</span><span class="identifier">geometry</span><span class="special">.</span><span class="identifier">hpp</span></code> |
| does not include this header. |
| </p> |
| <h6> |
| <a name="geometry.reference.adapted.boost_fusion.h3"></a> |
| <span class="phrase"><a name="geometry.reference.adapted.boost_fusion.example"></a></span><a class="link" href="boost_fusion.html#geometry.reference.adapted.boost_fusion.example">Example</a> |
| </h6> |
| <p> |
| Shows how to combine Boost.Fusion with Boost.Geometry |
| </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">fusion</span><span class="special">/</span><span class="identifier">include</span><span class="special">/</span><span class="identifier">adapt_struct_named</span><span class="special">.</span><span class="identifier">hpp</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="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">geometries</span><span class="special">/</span><span class="identifier">adapted</span><span class="special">/</span><span class="identifier">boost_fusion</span><span class="special">.</span><span class="identifier">hpp</span><span class="special">></span> |
| |
| |
| <span class="keyword">struct</span> <span class="identifier">sample_point</span> |
| <span class="special">{</span> |
| <span class="keyword">double</span> <span class="identifier">x</span><span class="special">,</span> <span class="identifier">y</span><span class="special">,</span> <span class="identifier">z</span><span class="special">;</span> |
| <span class="special">};</span> |
| |
| <span class="identifier">BOOST_FUSION_ADAPT_STRUCT</span><span class="special">(</span><span class="identifier">sample_point</span><span class="special">,</span> <span class="special">(</span><span class="keyword">double</span><span class="special">,</span> <span class="identifier">x</span><span class="special">)</span> <span class="special">(</span><span class="keyword">double</span><span class="special">,</span> <span class="identifier">y</span><span class="special">)</span> <span class="special">(</span><span class="keyword">double</span><span class="special">,</span> <span class="identifier">z</span><span class="special">))</span> |
| <span class="identifier">BOOST_GEOMETRY_REGISTER_BOOST_FUSION_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">int</span> <span class="identifier">main</span><span class="special">()</span> |
| <span class="special">{</span> |
| <span class="identifier">sample_point</span> <span class="identifier">a</span><span class="special">,</span> <span class="identifier">b</span><span class="special">,</span> <span class="identifier">c</span><span class="special">;</span> |
| |
| <span class="comment">// Set coordinates the Boost.Geometry way (one of the ways)</span> |
| <span class="identifier">boost</span><span class="special">::</span><span class="identifier">geometry</span><span class="special">::</span><span class="identifier">assign_values</span><span class="special">(</span><span class="identifier">a</span><span class="special">,</span> <span class="number">3</span><span class="special">,</span> <span class="number">2</span><span class="special">,</span> <span class="number">1</span><span class="special">);</span> |
| |
| <span class="comment">// Set coordinates the Boost.Fusion way</span> |
| <span class="identifier">boost</span><span class="special">::</span><span class="identifier">fusion</span><span class="special">::</span><span class="identifier">at_c</span><span class="special"><</span><span class="number">0</span><span class="special">>(</span><span class="identifier">b</span><span class="special">)</span> <span class="special">=</span> <span class="number">6</span><span class="special">;</span> |
| <span class="identifier">boost</span><span class="special">::</span><span class="identifier">fusion</span><span class="special">::</span><span class="identifier">at_c</span><span class="special"><</span><span class="number">1</span><span class="special">>(</span><span class="identifier">b</span><span class="special">)</span> <span class="special">=</span> <span class="number">5</span><span class="special">;</span> |
| <span class="identifier">boost</span><span class="special">::</span><span class="identifier">fusion</span><span class="special">::</span><span class="identifier">at_c</span><span class="special"><</span><span class="number">2</span><span class="special">>(</span><span class="identifier">b</span><span class="special">)</span> <span class="special">=</span> <span class="number">4</span><span class="special">;</span> |
| |
| <span class="comment">// Set coordinates the native way</span> |
| <span class="identifier">c</span><span class="special">.</span><span class="identifier">x</span> <span class="special">=</span> <span class="number">9</span><span class="special">;</span> |
| <span class="identifier">c</span><span class="special">.</span><span class="identifier">y</span> <span class="special">=</span> <span class="number">8</span><span class="special">;</span> |
| <span class="identifier">c</span><span class="special">.</span><span class="identifier">z</span> <span class="special">=</span> <span class="number">7</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">"Distance a-b: "</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">distance</span><span class="special">(</span><span class="identifier">a</span><span class="special">,</span> <span class="identifier">b</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="identifier">std</span><span class="special">::</span><span class="identifier">cout</span> <span class="special"><<</span> <span class="string">"Distance a-c: "</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">distance</span><span class="special">(</span><span class="identifier">a</span><span class="special">,</span> <span class="identifier">c</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">Distance a-b: 5.19615 |
| Distance a-c: 10.3923 |
| </pre> |
| </div> |
| <table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr> |
| <td align="left"></td> |
| <td align="right"><div class="copyright-footer">Copyright © 2009-2015 Barend Gehrels, Bruno Lalande, |
| 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>) |
| </p> |
| </div></td> |
| </tr></table> |
| <hr> |
| <div class="spirit-nav"> |
| <a accesskey="p" href="boost_array.html"><img src="../../../../../../../doc/src/images/prev.png" alt="Prev"></a><a accesskey="u" href="../adapted.html"><img src="../../../../../../../doc/src/images/up.png" alt="Up"></a><a accesskey="h" href="../../../index.html"><img src="../../../../../../../doc/src/images/home.png" alt="Home"></a><a accesskey="n" href="boost_tuple.html"><img src="../../../../../../../doc/src/images/next.png" alt="Next"></a> |
| </div> |
| </body> |
| </html> |