1<html> 2<head> 3<meta http-equiv="Content-Type" content="text/html; charset=UTF-8"> 4<title>perimeter (with strategy)</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="../perimeter.html" title="perimeter"> 9<link rel="prev" href="perimeter_1.html" title="perimeter"> 10<link rel="next" href="../relate.html" title="relate"> 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="perimeter_1.html"><img src="../../../../../../../../doc/src/images/prev.png" alt="Prev"></a><a accesskey="u" href="../perimeter.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="../relate.html"><img src="../../../../../../../../doc/src/images/next.png" alt="Next"></a> 24</div> 25<div class="section"> 26<div class="titlepage"><div><div><h5 class="title"> 27<a name="geometry.reference.algorithms.perimeter.perimeter_2_with_strategy"></a><a class="link" href="perimeter_2_with_strategy.html" title="perimeter (with strategy)">perimeter 28 (with strategy)</a> 29</h5></div></div></div> 30<p> 31 <a class="indexterm" name="idm45635690288960"></a> 32Calculates the perimeter of a geometry using the specified strategy. 33 </p> 34<h6> 35<a name="geometry.reference.algorithms.perimeter.perimeter_2_with_strategy.h0"></a> 36 <span class="phrase"><a name="geometry.reference.algorithms.perimeter.perimeter_2_with_strategy.description"></a></span><a class="link" href="perimeter_2_with_strategy.html#geometry.reference.algorithms.perimeter.perimeter_2_with_strategy.description">Description</a> 37 </h6> 38<p> 39 The function perimeter returns the perimeter of a geometry, using specified 40 strategy 41 </p> 42<h6> 43<a name="geometry.reference.algorithms.perimeter.perimeter_2_with_strategy.h1"></a> 44 <span class="phrase"><a name="geometry.reference.algorithms.perimeter.perimeter_2_with_strategy.synopsis"></a></span><a class="link" href="perimeter_2_with_strategy.html#geometry.reference.algorithms.perimeter.perimeter_2_with_strategy.synopsis">Synopsis</a> 45 </h6> 46<p> 47</p> 48<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> <span class="keyword">typename</span> <span class="identifier">Strategy</span><span class="special">></span> 49<span class="identifier">default_length_result</span><span class="special"><</span><span class="identifier">Geometry</span><span class="special">>::</span><span class="identifier">type</span> <span class="identifier">perimeter</span><span class="special">(</span><span class="identifier">Geometry</span> <span class="keyword">const</span> <span class="special">&</span> <span class="identifier">geometry</span><span class="special">,</span> <span class="identifier">Strategy</span> <span class="keyword">const</span> <span class="special">&</span> <span class="identifier">strategy</span><span class="special">)</span></pre> 50<p> 51 </p> 52<h6> 53<a name="geometry.reference.algorithms.perimeter.perimeter_2_with_strategy.h2"></a> 54 <span class="phrase"><a name="geometry.reference.algorithms.perimeter.perimeter_2_with_strategy.parameters"></a></span><a class="link" href="perimeter_2_with_strategy.html#geometry.reference.algorithms.perimeter.perimeter_2_with_strategy.parameters">Parameters</a> 55 </h6> 56<div class="informaltable"><table class="table"> 57<colgroup> 58<col> 59<col> 60<col> 61<col> 62</colgroup> 63<thead><tr> 64<th> 65 <p> 66 Type 67 </p> 68 </th> 69<th> 70 <p> 71 Concept 72 </p> 73 </th> 74<th> 75 <p> 76 Name 77 </p> 78 </th> 79<th> 80 <p> 81 Description 82 </p> 83 </th> 84</tr></thead> 85<tbody> 86<tr> 87<td> 88 <p> 89 Geometry const & 90 </p> 91 </td> 92<td> 93 <p> 94 Any type fulfilling a Geometry Concept 95 </p> 96 </td> 97<td> 98 <p> 99 geometry 100 </p> 101 </td> 102<td> 103 <p> 104 A model of the specified concept 105 </p> 106 </td> 107</tr> 108<tr> 109<td> 110 <p> 111 Strategy const & 112 </p> 113 </td> 114<td> 115 <p> 116 Any type fulfilling a distance Strategy Concept 117 </p> 118 </td> 119<td> 120 <p> 121 strategy 122 </p> 123 </td> 124<td> 125 <p> 126 strategy to be used for distance calculations. 127 </p> 128 </td> 129</tr> 130</tbody> 131</table></div> 132<h6> 133<a name="geometry.reference.algorithms.perimeter.perimeter_2_with_strategy.h3"></a> 134 <span class="phrase"><a name="geometry.reference.algorithms.perimeter.perimeter_2_with_strategy.returns"></a></span><a class="link" href="perimeter_2_with_strategy.html#geometry.reference.algorithms.perimeter.perimeter_2_with_strategy.returns">Returns</a> 135 </h6> 136<p> 137 The calculated perimeter 138 </p> 139<h6> 140<a name="geometry.reference.algorithms.perimeter.perimeter_2_with_strategy.h4"></a> 141 <span class="phrase"><a name="geometry.reference.algorithms.perimeter.perimeter_2_with_strategy.header"></a></span><a class="link" href="perimeter_2_with_strategy.html#geometry.reference.algorithms.perimeter.perimeter_2_with_strategy.header">Header</a> 142 </h6> 143<p> 144 Either 145 </p> 146<p> 147 <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> 148 </p> 149<p> 150 Or 151 </p> 152<p> 153 <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">perimeter</span><span class="special">.</span><span class="identifier">hpp</span><span class="special">></span></code> 154 </p> 155<h6> 156<a name="geometry.reference.algorithms.perimeter.perimeter_2_with_strategy.h5"></a> 157 <span class="phrase"><a name="geometry.reference.algorithms.perimeter.perimeter_2_with_strategy.conformance"></a></span><a class="link" href="perimeter_2_with_strategy.html#geometry.reference.algorithms.perimeter.perimeter_2_with_strategy.conformance">Conformance</a> 158 </h6> 159<p> 160 The function perimeter is not defined by OGC. 161 </p> 162<div class="note"><table border="0" summary="Note"> 163<tr> 164<td rowspan="2" align="center" valign="top" width="25"><img alt="[Note]" src="../../../../../../../../doc/src/images/note.png"></td> 165<th align="left">Note</th> 166</tr> 167<tr><td align="left" valign="top"><p> 168 PostGIS contains an algorithm with the same name and the same functionality. 169 See the <a href="http://www.postgis.org/docs/ST_Perimeter.html" target="_top">PostGIS 170 documentation</a>. 171 </p></td></tr> 172</table></div> 173<h6> 174<a name="geometry.reference.algorithms.perimeter.perimeter_2_with_strategy.h6"></a> 175 <span class="phrase"><a name="geometry.reference.algorithms.perimeter.perimeter_2_with_strategy.behavior"></a></span><a class="link" href="perimeter_2_with_strategy.html#geometry.reference.algorithms.perimeter.perimeter_2_with_strategy.behavior">Behavior</a> 176 </h6> 177<div class="informaltable"><table class="table"> 178<colgroup> 179<col> 180<col> 181</colgroup> 182<thead><tr> 183<th> 184 <p> 185 Case 186 </p> 187 </th> 188<th> 189 <p> 190 Behavior 191 </p> 192 </th> 193</tr></thead> 194<tbody> 195<tr> 196<td> 197 <p> 198 pointlike (e.g. point) 199 </p> 200 </td> 201<td> 202 <p> 203 Returns zero 204 </p> 205 </td> 206</tr> 207<tr> 208<td> 209 <p> 210 linear (e.g. linestring) 211 </p> 212 </td> 213<td> 214 <p> 215 Returns zero 216 </p> 217 </td> 218</tr> 219<tr> 220<td> 221 <p> 222 areal (e.g. polygon) 223 </p> 224 </td> 225<td> 226 <p> 227 Returns the perimeter 228 </p> 229 </td> 230</tr> 231</tbody> 232</table></div> 233<h6> 234<a name="geometry.reference.algorithms.perimeter.perimeter_2_with_strategy.h7"></a> 235 <span class="phrase"><a name="geometry.reference.algorithms.perimeter.perimeter_2_with_strategy.complexity"></a></span><a class="link" href="perimeter_2_with_strategy.html#geometry.reference.algorithms.perimeter.perimeter_2_with_strategy.complexity">Complexity</a> 236 </h6> 237<p> 238 Linear 239 </p> 240</div> 241<table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr> 242<td align="left"></td> 243<td align="right"><div class="copyright-footer">Copyright © 2009-2019 Barend Gehrels, Bruno Lalande, Mateusz Loskot, Adam 244 Wulkiewicz, Oracle and/or its affiliates<p> 245 Distributed under the Boost Software License, Version 1.0. (See accompanying 246 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>) 247 </p> 248</div></td> 249</tr></table> 250<hr> 251<div class="spirit-nav"> 252<a accesskey="p" href="perimeter_1.html"><img src="../../../../../../../../doc/src/images/prev.png" alt="Prev"></a><a accesskey="u" href="../perimeter.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="../relate.html"><img src="../../../../../../../../doc/src/images/next.png" alt="Next"></a> 253</div> 254</body> 255</html> 256
