1<html> 2<head> 3<meta http-equiv="Content-Type" content="text/html; charset=UTF-8"> 4<title>coordinate_system</title> 5<link rel="stylesheet" href="../../../../../../../doc/src/boostbook.css" type="text/css"> 6<meta name="generator" content="DocBook XSL Stylesheets V1.79.1"> 7<link rel="home" href="../../../index.html" title="Chapter 1. Geometry"> 8<link rel="up" href="../core.html" title="Core Metafunctions"> 9<link rel="prev" href="closure.html" title="closure"> 10<link rel="next" href="coordinate_type.html" title="coordinate_type"> 11</head> 12<body bgcolor="white" text="black" link="#0000FF" vlink="#840084" alink="#0000FF"> 13<table cellpadding="2" width="100%"><tr> 14<td valign="top"><img alt="Boost C++ Libraries" width="277" height="86" src="../../../../../../../boost.png"></td> 15<td align="center"><a href="../../../../../../../index.html">Home</a></td> 16<td align="center"><a href="../../../../../../../libs/libraries.htm">Libraries</a></td> 17<td align="center"><a href="http://www.boost.org/users/people.html">People</a></td> 18<td align="center"><a href="http://www.boost.org/users/faq.html">FAQ</a></td> 19<td align="center"><a href="../../../../../../../more/index.htm">More</a></td> 20</tr></table> 21<hr> 22<div class="spirit-nav"> 23<a accesskey="p" href="closure.html"><img src="../../../../../../../doc/src/images/prev.png" alt="Prev"></a><a accesskey="u" href="../core.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="coordinate_type.html"><img src="../../../../../../../doc/src/images/next.png" alt="Next"></a> 24</div> 25<div class="section"> 26<div class="titlepage"><div><div><h4 class="title"> 27<a name="geometry.reference.core.coordinate_system"></a><a class="link" href="coordinate_system.html" title="coordinate_system">coordinate_system</a> 28</h4></div></div></div> 29<p> 30 <a class="indexterm" name="idm45635684334576"></a> 31Metafunction defining <span class="bold"><strong>type</strong></span> as the coordinate 32 system (cartesian, spherical, etc) of the point type making up the specified 33 geometry type. 34 </p> 35<h6> 36<a name="geometry.reference.core.coordinate_system.h0"></a> 37 <span class="phrase"><a name="geometry.reference.core.coordinate_system.synopsis"></a></span><a class="link" href="coordinate_system.html#geometry.reference.core.coordinate_system.synopsis">Synopsis</a> 38 </h6> 39<p> 40</p> 41<pre class="programlisting"><span class="keyword">template</span><span class="special"><</span><span class="keyword">typename</span> <span class="identifier">Geometry</span><span class="special">></span> 42<span class="keyword">struct</span> <span class="identifier">coordinate_system</span> 43<span class="special">{</span> 44 <span class="comment">// ...</span> 45<span class="special">};</span> 46</pre> 47<p> 48 </p> 49<h6> 50<a name="geometry.reference.core.coordinate_system.h1"></a> 51 <span class="phrase"><a name="geometry.reference.core.coordinate_system.template_parameter_s_"></a></span><a class="link" href="coordinate_system.html#geometry.reference.core.coordinate_system.template_parameter_s_">Template 52 parameter(s)</a> 53 </h6> 54<div class="informaltable"><table class="table"> 55<colgroup> 56<col> 57<col> 58</colgroup> 59<thead><tr> 60<th> 61 <p> 62 Parameter 63 </p> 64 </th> 65<th> 66 <p> 67 Description 68 </p> 69 </th> 70</tr></thead> 71<tbody><tr> 72<td> 73 <p> 74 typename Geometry 75 </p> 76 </td> 77<td> 78 <p> 79 Any type fulfilling a Geometry Concept 80 </p> 81 </td> 82</tr></tbody> 83</table></div> 84<h6> 85<a name="geometry.reference.core.coordinate_system.h2"></a> 86 <span class="phrase"><a name="geometry.reference.core.coordinate_system.header"></a></span><a class="link" href="coordinate_system.html#geometry.reference.core.coordinate_system.header">Header</a> 87 </h6> 88<p> 89 Either 90 </p> 91<p> 92 <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">hpp</span><span class="special">></span></code> 93 </p> 94<p> 95 Or 96 </p> 97<p> 98 <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">core</span><span class="special">/</span><span class="identifier">coordinate_system</span><span class="special">.</span><span class="identifier">hpp</span><span class="special">></span></code> 99 </p> 100<h6> 101<a name="geometry.reference.core.coordinate_system.h3"></a> 102 <span class="phrase"><a name="geometry.reference.core.coordinate_system.complexity"></a></span><a class="link" href="coordinate_system.html#geometry.reference.core.coordinate_system.complexity">Complexity</a> 103 </h6> 104<p> 105 Compile time 106 </p> 107<h6> 108<a name="geometry.reference.core.coordinate_system.h4"></a> 109 <span class="phrase"><a name="geometry.reference.core.coordinate_system.example"></a></span><a class="link" href="coordinate_system.html#geometry.reference.core.coordinate_system.example">Example</a> 110 </h6> 111<p> 112 Examine the coordinate system of a point 113 </p> 114<p> 115</p> 116<pre class="programlisting"><span class="preprocessor">#include</span> <span class="special"><</span><span class="identifier">iostream</span><span class="special">></span> 117<span class="preprocessor">#include</span> <span class="special"><</span><span class="identifier">typeinfo</span><span class="special">></span> 118 119<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> 120<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">polygon</span><span class="special">.</span><span class="identifier">hpp</span><span class="special">></span> 121<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">point_xy</span><span class="special">.</span><span class="identifier">hpp</span><span class="special">></span> 122 123<span class="keyword">int</span> <span class="identifier">main</span><span class="special">()</span> 124<span class="special">{</span> 125 <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">d2</span><span class="special">::</span><span class="identifier">point_xy</span><span class="special"><</span><span class="keyword">double</span><span class="special">></span> <span class="identifier">point_type</span><span class="special">;</span> 126 <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">polygon</span><span class="special"><</span><span class="identifier">point_type</span><span class="special">></span> <span class="identifier">polygon_type</span><span class="special">;</span> 127 128 <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">coordinate_system</span><span class="special"><</span><span class="identifier">polygon_type</span><span class="special">>::</span><span class="identifier">type</span> <span class="identifier">system</span><span class="special">;</span> 129 130 <span class="identifier">std</span><span class="special">::</span><span class="identifier">cout</span> <span class="special"><<</span> <span class="string">"system: "</span> <span class="special"><<</span> <span class="keyword">typeid</span><span class="special">(</span><span class="identifier">system</span><span class="special">).</span><span class="identifier">name</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> 131 132 <span class="keyword">return</span> <span class="number">0</span><span class="special">;</span> 133<span class="special">}</span> 134</pre> 135<p> 136 </p> 137<p> 138 Output (using MSVC): 139 </p> 140<pre class="programlisting">system: struct boost::geometry::cs::cartesian 141</pre> 142</div> 143<table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr> 144<td align="left"></td> 145<td align="right"><div class="copyright-footer">Copyright © 2009-2019 Barend Gehrels, Bruno Lalande, Mateusz Loskot, Adam 146 Wulkiewicz, Oracle and/or its affiliates<p> 147 Distributed under the Boost Software License, Version 1.0. (See accompanying 148 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>) 149 </p> 150</div></td> 151</tr></table> 152<hr> 153<div class="spirit-nav"> 154<a accesskey="p" href="closure.html"><img src="../../../../../../../doc/src/images/prev.png" alt="Prev"></a><a accesskey="u" href="../core.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="coordinate_type.html"><img src="../../../../../../../doc/src/images/next.png" alt="Next"></a> 155</div> 156</body> 157</html> 158
