1<html> 2<head> 3<meta http-equiv="Content-Type" content="text/html; charset=UTF-8"> 4<title>order_selector</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="../enumerations.html" title="Enumerations"> 9<link rel="prev" href="join_selector.html" title="join_selector"> 10<link rel="next" href="piece_type.html" title="piece_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="join_selector.html"><img src="../../../../../../../doc/src/images/prev.png" alt="Prev"></a><a accesskey="u" href="../enumerations.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="piece_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.enumerations.order_selector"></a><a class="link" href="order_selector.html" title="order_selector">order_selector</a> 28</h4></div></div></div> 29<p> 30 <a class="indexterm" name="idm45635682335152"></a> 31<a class="indexterm" name="idm45635682334336"></a> 32<a class="indexterm" name="idm45635682333520"></a> 33<a class="indexterm" name="idm45635682332704"></a> 34Enumerates options for the order of points within polygons. 35 </p> 36<h6> 37<a name="geometry.reference.enumerations.order_selector.h0"></a> 38 <span class="phrase"><a name="geometry.reference.enumerations.order_selector.description"></a></span><a class="link" href="order_selector.html#geometry.reference.enumerations.order_selector.description">Description</a> 39 </h6> 40<p> 41 The enumeration order_selector describes options for the order of points 42 within a polygon. Polygons can be ordered either clockwise or counterclockwise. 43 The specific order of a polygon type is defined by the point_order metafunction. 44 The point_order metafunction defines a value, which is one of the values 45 enumerated in the order_selector 46 </p> 47<h6> 48<a name="geometry.reference.enumerations.order_selector.h1"></a> 49 <span class="phrase"><a name="geometry.reference.enumerations.order_selector.synopsis"></a></span><a class="link" href="order_selector.html#geometry.reference.enumerations.order_selector.synopsis">Synopsis</a> 50 </h6> 51<p> 52</p> 53<pre class="programlisting"><span class="keyword">enum</span> <span class="identifier">order_selector</span> <span class="special">{</span><span class="identifier">clockwise</span> <span class="special">=</span> <span class="number">1</span><span class="special">,</span> <span class="identifier">counterclockwise</span> <span class="special">=</span> <span class="number">2</span><span class="special">,</span> <span class="identifier">order_undetermined</span> <span class="special">=</span> <span class="number">0</span><span class="special">};</span></pre> 54<p> 55 </p> 56<h6> 57<a name="geometry.reference.enumerations.order_selector.h2"></a> 58 <span class="phrase"><a name="geometry.reference.enumerations.order_selector.values"></a></span><a class="link" href="order_selector.html#geometry.reference.enumerations.order_selector.values">Values</a> 59 </h6> 60<div class="informaltable"><table class="table"> 61<colgroup> 62<col> 63<col> 64</colgroup> 65<thead><tr> 66<th> 67 <p> 68 Value 69 </p> 70 </th> 71<th> 72 <p> 73 Description 74 </p> 75 </th> 76</tr></thead> 77<tbody> 78<tr> 79<td> 80 <p> 81 clockwise 82 </p> 83 </td> 84<td> 85 <p> 86 Points are ordered clockwise. 87 </p> 88 </td> 89</tr> 90<tr> 91<td> 92 <p> 93 counterclockwise 94 </p> 95 </td> 96<td> 97 <p> 98 Points are ordered counter clockwise. 99 </p> 100 </td> 101</tr> 102<tr> 103<td> 104 <p> 105 order_undetermined 106 </p> 107 </td> 108<td> 109 <p> 110 Points might be stored in any order, algorithms will determine 111 it on the fly (not yet supported) 112 </p> 113 </td> 114</tr> 115</tbody> 116</table></div> 117<h6> 118<a name="geometry.reference.enumerations.order_selector.h3"></a> 119 <span class="phrase"><a name="geometry.reference.enumerations.order_selector.header"></a></span><a class="link" href="order_selector.html#geometry.reference.enumerations.order_selector.header">Header</a> 120 </h6> 121<p> 122 Either 123 </p> 124<p> 125 <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> 126 </p> 127<p> 128 Or 129 </p> 130<p> 131 <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">point_order</span><span class="special">.</span><span class="identifier">hpp</span><span class="special">></span></code> 132 </p> 133<h6> 134<a name="geometry.reference.enumerations.order_selector.h4"></a> 135 <span class="phrase"><a name="geometry.reference.enumerations.order_selector.see_also"></a></span><a class="link" href="order_selector.html#geometry.reference.enumerations.order_selector.see_also">See also</a> 136 </h6> 137<p> 138 <a class="link" href="../core/point_order.html" title="point_order">The point_order metafunction</a> 139 </p> 140</div> 141<table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr> 142<td align="left"></td> 143<td align="right"><div class="copyright-footer">Copyright © 2009-2019 Barend Gehrels, Bruno Lalande, Mateusz Loskot, Adam 144 Wulkiewicz, Oracle and/or its affiliates<p> 145 Distributed under the Boost Software License, Version 1.0. (See accompanying 146 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>) 147 </p> 148</div></td> 149</tr></table> 150<hr> 151<div class="spirit-nav"> 152<a accesskey="p" href="join_selector.html"><img src="../../../../../../../doc/src/images/prev.png" alt="Prev"></a><a accesskey="u" href="../enumerations.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="piece_type.html"><img src="../../../../../../../doc/src/images/next.png" alt="Next"></a> 153</div> 154</body> 155</html> 156
