1<html> 2<head> 3<meta http-equiv="Content-Type" content="text/html; charset=UTF-8"> 4<title>expand</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="../expand.html" title="expand"> 9<link rel="prev" href="expand_3_with_strategy.html" title="expand (with strategy)"> 10<link rel="next" href="../for_each.html" title="for_each"> 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="expand_3_with_strategy.html"><img src="../../../../../../../../doc/src/images/prev.png" alt="Prev"></a><a accesskey="u" href="../expand.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="../for_each.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.expand.expand_2"></a><a class="link" href="expand_2.html" title="expand">expand</a> 28</h5></div></div></div> 29<p> 30 <a class="indexterm" name="idm45635696636800"></a> 31Expands a box using the bounding box (envelope) of another geometry (box, 32 point) 33 </p> 34<h6> 35<a name="geometry.reference.algorithms.expand.expand_2.h0"></a> 36 <span class="phrase"><a name="geometry.reference.algorithms.expand.expand_2.synopsis"></a></span><a class="link" href="expand_2.html#geometry.reference.algorithms.expand.expand_2.synopsis">Synopsis</a> 37 </h6> 38<p> 39</p> 40<pre class="programlisting"><span class="keyword">template</span><span class="special"><</span><span class="keyword">typename</span> <span class="identifier">Box</span><span class="special">,</span> <span class="keyword">typename</span> <span class="identifier">Geometry</span><span class="special">></span> 41<span class="keyword">void</span> <span class="identifier">expand</span><span class="special">(</span><span class="identifier">Box</span> <span class="special">&</span> <span class="identifier">box</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></pre> 42<p> 43 </p> 44<h6> 45<a name="geometry.reference.algorithms.expand.expand_2.h1"></a> 46 <span class="phrase"><a name="geometry.reference.algorithms.expand.expand_2.parameters"></a></span><a class="link" href="expand_2.html#geometry.reference.algorithms.expand.expand_2.parameters">Parameters</a> 47 </h6> 48<div class="informaltable"><table class="table"> 49<colgroup> 50<col> 51<col> 52<col> 53<col> 54</colgroup> 55<thead><tr> 56<th> 57 <p> 58 Type 59 </p> 60 </th> 61<th> 62 <p> 63 Concept 64 </p> 65 </th> 66<th> 67 <p> 68 Name 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 Box & 82 </p> 83 </td> 84<td> 85 <p> 86 type of the box 87 </p> 88 </td> 89<td> 90 <p> 91 box 92 </p> 93 </td> 94<td> 95 <p> 96 box to be expanded using another geometry, mutable 97 </p> 98 </td> 99</tr> 100<tr> 101<td> 102 <p> 103 Geometry const & 104 </p> 105 </td> 106<td> 107 <p> 108 Any type fulfilling a Geometry Concept 109 </p> 110 </td> 111<td> 112 <p> 113 geometry 114 </p> 115 </td> 116<td> 117 <p> 118 A model of the specified concept geometry which envelope (bounding 119 box) will be added to the box 120 </p> 121 </td> 122</tr> 123</tbody> 124</table></div> 125<h6> 126<a name="geometry.reference.algorithms.expand.expand_2.h2"></a> 127 <span class="phrase"><a name="geometry.reference.algorithms.expand.expand_2.header"></a></span><a class="link" href="expand_2.html#geometry.reference.algorithms.expand.expand_2.header">Header</a> 128 </h6> 129<p> 130 Either 131 </p> 132<p> 133 <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> 134 </p> 135<p> 136 Or 137 </p> 138<p> 139 <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">expand</span><span class="special">.</span><span class="identifier">hpp</span><span class="special">></span></code> 140 </p> 141<h6> 142<a name="geometry.reference.algorithms.expand.expand_2.h3"></a> 143 <span class="phrase"><a name="geometry.reference.algorithms.expand.expand_2.conformance"></a></span><a class="link" href="expand_2.html#geometry.reference.algorithms.expand.expand_2.conformance">Conformance</a> 144 </h6> 145<p> 146 The function expand is not defined by OGC. 147 </p> 148<h6> 149<a name="geometry.reference.algorithms.expand.expand_2.h4"></a> 150 <span class="phrase"><a name="geometry.reference.algorithms.expand.expand_2.behavior"></a></span><a class="link" href="expand_2.html#geometry.reference.algorithms.expand.expand_2.behavior">Behavior</a> 151 </h6> 152<div class="informaltable"><table class="table"> 153<colgroup> 154<col> 155<col> 156</colgroup> 157<thead><tr> 158<th> 159 <p> 160 Case 161 </p> 162 </th> 163<th> 164 <p> 165 Behavior 166 </p> 167 </th> 168</tr></thead> 169<tbody> 170<tr> 171<td> 172 <p> 173 Box / Point 174 </p> 175 </td> 176<td> 177 <p> 178 Box is expanded to include the specified Point 179 </p> 180 </td> 181</tr> 182<tr> 183<td> 184 <p> 185 Box / Box 186 </p> 187 </td> 188<td> 189 <p> 190 Box is expanded to include the specified Box 191 </p> 192 </td> 193</tr> 194<tr> 195<td> 196 <p> 197 Box / Other geometries 198 </p> 199 </td> 200<td> 201 <p> 202 Not yet supported in this version 203 </p> 204 </td> 205</tr> 206</tbody> 207</table></div> 208<div class="note"><table border="0" summary="Note"> 209<tr> 210<td rowspan="2" align="center" valign="top" width="25"><img alt="[Note]" src="../../../../../../../../doc/src/images/note.png"></td> 211<th align="left">Note</th> 212</tr> 213<tr><td align="left" valign="top"><p> 214 To use expand with another geometry type then specified, use expand(make_envelope<box_type>(geometry) 215 </p></td></tr> 216</table></div> 217<h6> 218<a name="geometry.reference.algorithms.expand.expand_2.h5"></a> 219 <span class="phrase"><a name="geometry.reference.algorithms.expand.expand_2.complexity"></a></span><a class="link" href="expand_2.html#geometry.reference.algorithms.expand.expand_2.complexity">Complexity</a> 220 </h6> 221<p> 222 Linear 223 </p> 224<h6> 225<a name="geometry.reference.algorithms.expand.expand_2.h6"></a> 226 <span class="phrase"><a name="geometry.reference.algorithms.expand.expand_2.example"></a></span><a class="link" href="expand_2.html#geometry.reference.algorithms.expand.expand_2.example">Example</a> 227 </h6> 228<p> 229 Shows the usage of expand 230 </p> 231<p> 232</p> 233<pre class="programlisting"><span class="preprocessor">#include</span> <span class="special"><</span><span class="identifier">iostream</span><span class="special">></span> 234<span class="preprocessor">#include</span> <span class="special"><</span><span class="identifier">list</span><span class="special">></span> 235 236<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> 237<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">box</span><span class="special">.</span><span class="identifier">hpp</span><span class="special">></span> 238<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> 239 240<span class="keyword">int</span> <span class="identifier">main</span><span class="special">()</span> 241<span class="special">{</span> 242 <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">short</span> <span class="keyword">int</span><span class="special">></span> <span class="identifier">point_type</span><span class="special">;</span> 243 <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">box</span><span class="special"><</span><span class="identifier">point_type</span><span class="special">></span> <span class="identifier">box_type</span><span class="special">;</span> 244 245 <span class="keyword">using</span> <span class="identifier">boost</span><span class="special">::</span><span class="identifier">geometry</span><span class="special">::</span><span class="identifier">expand</span><span class="special">;</span> 246 247 <span class="identifier">box_type</span> <span class="identifier">box</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">make_inverse</span><span class="special"><</span><span class="identifier">box_type</span><span class="special">>();</span> <a class="co" name="geometry.reference.algorithms.expand.expand_2.c0" href="expand_2.html#geometry.reference.algorithms.expand.expand_2.c1"><img src="../../../../../../../../doc/src/images/callouts/1.png" alt="1" border="0"></a> 248 249 <span class="identifier">expand</span><span class="special">(</span><span class="identifier">box</span><span class="special">,</span> <span class="identifier">point_type</span><span class="special">(</span><span class="number">0</span><span class="special">,</span> <span class="number">0</span><span class="special">));</span> 250 <span class="identifier">expand</span><span class="special">(</span><span class="identifier">box</span><span class="special">,</span> <span class="identifier">point_type</span><span class="special">(</span><span class="number">1</span><span class="special">,</span> <span class="number">2</span><span class="special">));</span> 251 <span class="identifier">expand</span><span class="special">(</span><span class="identifier">box</span><span class="special">,</span> <span class="identifier">point_type</span><span class="special">(</span><span class="number">5</span><span class="special">,</span> <span class="number">4</span><span class="special">));</span> 252 <span class="identifier">expand</span><span class="special">(</span><span class="identifier">box</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">make</span><span class="special"><</span><span class="identifier">box_type</span><span class="special">>(</span><span class="number">3</span><span class="special">,</span> <span class="number">3</span><span class="special">,</span> <span class="number">5</span><span class="special">,</span> <span class="number">5</span><span class="special">));</span> 253 254 <span class="identifier">std</span><span class="special">::</span><span class="identifier">cout</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">dsv</span><span class="special">(</span><span class="identifier">box</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> 255 256 <span class="keyword">return</span> <span class="number">0</span><span class="special">;</span> 257<span class="special">}</span> 258</pre> 259<p> 260 </p> 261<div class="calloutlist"><table border="0" summary="Callout list"><tr> 262<td width="5%" valign="top" align="left"><p><a name="geometry.reference.algorithms.expand.expand_2.c1"></a><a href="#geometry.reference.algorithms.expand.expand_2.c0"><img src="../../../../../../../../doc/src/images/callouts/1.png" alt="1" border="0"></a> </p></td> 263<td valign="top" align="left"><p> 264 expand is usually preceded by a call to assign_inverse or make_inverse 265 </p></td> 266</tr></table></div> 267<p> 268 Output: 269 </p> 270<pre class="programlisting">((0, 0), (5, 5)) 271</pre> 272</div> 273<table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr> 274<td align="left"></td> 275<td align="right"><div class="copyright-footer">Copyright © 2009-2019 Barend Gehrels, Bruno Lalande, Mateusz Loskot, Adam 276 Wulkiewicz, Oracle and/or its affiliates<p> 277 Distributed under the Boost Software License, Version 1.0. (See accompanying 278 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>) 279 </p> 280</div></td> 281</tr></table> 282<hr> 283<div class="spirit-nav"> 284<a accesskey="p" href="expand_3_with_strategy.html"><img src="../../../../../../../../doc/src/images/prev.png" alt="Prev"></a><a accesskey="u" href="../expand.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="../for_each.html"><img src="../../../../../../../../doc/src/images/next.png" alt="Next"></a> 285</div> 286</body> 287</html> 288
