1<html> 2<head> 3<meta http-equiv="Content-Type" content="text/html; charset=UTF-8"> 4<title>strategy::buffer::end_flat</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="../strategies.html" title="Strategies"> 9<link rel="prev" href="strategy_buffer_end_round.html" title="strategy::buffer::end_round"> 10<link rel="next" href="strategy_buffer_distance_symmetric.html" title="strategy::buffer::distance_symmetric"> 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="strategy_buffer_end_round.html"><img src="../../../../../../../doc/src/images/prev.png" alt="Prev"></a><a accesskey="u" href="../strategies.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="strategy_buffer_distance_symmetric.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.strategies.strategy_buffer_end_flat"></a><a class="link" href="strategy_buffer_end_flat.html" title="strategy::buffer::end_flat">strategy::buffer::end_flat</a> 28</h4></div></div></div> 29<p> 30 <a class="indexterm" name="idm45635670933040"></a><a class="indexterm" name="idm45635670932352"></a><a class="indexterm" name="idm45635670931664"></a> 31Let the buffer create flat ends. 32 </p> 33<h6> 34<a name="geometry.reference.strategies.strategy_buffer_end_flat.h0"></a> 35 <span class="phrase"><a name="geometry.reference.strategies.strategy_buffer_end_flat.description"></a></span><a class="link" href="strategy_buffer_end_flat.html#geometry.reference.strategies.strategy_buffer_end_flat.description">Description</a> 36 </h6> 37<p> 38 This strategy can be used as EndStrategy for the buffer algorithm. It creates 39 a flat end for each linestring-end. It can be applied for (multi)linestrings. 40 Also it is applicable for spikes in (multi)polygons. This strategy is only 41 applicable for Cartesian coordinate systems. 42 </p> 43<h6> 44<a name="geometry.reference.strategies.strategy_buffer_end_flat.h1"></a> 45 <span class="phrase"><a name="geometry.reference.strategies.strategy_buffer_end_flat.synopsis"></a></span><a class="link" href="strategy_buffer_end_flat.html#geometry.reference.strategies.strategy_buffer_end_flat.synopsis">Synopsis</a> 46 </h6> 47<p> 48</p> 49<pre class="programlisting"><span class="keyword">class</span> <span class="identifier">strategy</span><span class="special">::</span><span class="identifier">buffer</span><span class="special">::</span><span class="identifier">end_flat</span> 50<span class="special">{</span> 51 <span class="comment">// ...</span> 52<span class="special">};</span> 53</pre> 54<p> 55 </p> 56<h6> 57<a name="geometry.reference.strategies.strategy_buffer_end_flat.h2"></a> 58 <span class="phrase"><a name="geometry.reference.strategies.strategy_buffer_end_flat.header"></a></span><a class="link" href="strategy_buffer_end_flat.html#geometry.reference.strategies.strategy_buffer_end_flat.header">Header</a> 59 </h6> 60<p> 61 <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">strategies</span><span class="special">/</span><span class="identifier">cartesian</span><span class="special">/</span><span class="identifier">buffer_end_flat</span><span class="special">.</span><span class="identifier">hpp</span><span class="special">></span></code> 62 </p> 63<h6> 64<a name="geometry.reference.strategies.strategy_buffer_end_flat.h3"></a> 65 <span class="phrase"><a name="geometry.reference.strategies.strategy_buffer_end_flat.example"></a></span><a class="link" href="strategy_buffer_end_flat.html#geometry.reference.strategies.strategy_buffer_end_flat.example">Example</a> 66 </h6> 67<p> 68 Shows how the end_flat strategy can be used as a EndStrategy to create 69 flat ends 70 </p> 71<p> 72</p> 73<pre class="programlisting"><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> 74<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> 75<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">geometries</span><span class="special">.</span><span class="identifier">hpp</span><span class="special">></span> 76 77 78<span class="keyword">int</span> <span class="identifier">main</span><span class="special">()</span> 79<span class="special">{</span> 80 <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</span><span class="special">;</span> 81 <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">linestring</span><span class="special"><</span><span class="identifier">point</span><span class="special">></span> <span class="identifier">linestring</span><span class="special">;</span> 82 <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</span><span class="special">></span> <span class="identifier">polygon</span><span class="special">;</span> 83 84 <span class="comment">// Declare the flat-end strategy</span> 85 <span class="identifier">boost</span><span class="special">::</span><span class="identifier">geometry</span><span class="special">::</span><span class="identifier">strategy</span><span class="special">::</span><span class="identifier">buffer</span><span class="special">::</span><span class="identifier">end_flat</span> <span class="identifier">end_strategy</span><span class="special">;</span> 86 87 <span class="comment">// Declare other strategies</span> 88 <span class="identifier">boost</span><span class="special">::</span><span class="identifier">geometry</span><span class="special">::</span><span class="identifier">strategy</span><span class="special">::</span><span class="identifier">buffer</span><span class="special">::</span><span class="identifier">distance_symmetric</span><span class="special"><</span><span class="keyword">double</span><span class="special">></span> <span class="identifier">distance_strategy</span><span class="special">(</span><span class="number">1.0</span><span class="special">);</span> 89 <span class="identifier">boost</span><span class="special">::</span><span class="identifier">geometry</span><span class="special">::</span><span class="identifier">strategy</span><span class="special">::</span><span class="identifier">buffer</span><span class="special">::</span><span class="identifier">side_straight</span> <span class="identifier">side_strategy</span><span class="special">;</span> 90 <span class="identifier">boost</span><span class="special">::</span><span class="identifier">geometry</span><span class="special">::</span><span class="identifier">strategy</span><span class="special">::</span><span class="identifier">buffer</span><span class="special">::</span><span class="identifier">join_round</span> <span class="identifier">join_strategy</span><span class="special">;</span> 91 <span class="identifier">boost</span><span class="special">::</span><span class="identifier">geometry</span><span class="special">::</span><span class="identifier">strategy</span><span class="special">::</span><span class="identifier">buffer</span><span class="special">::</span><span class="identifier">point_circle</span> <span class="identifier">point_strategy</span><span class="special">;</span> 92 93 <span class="comment">// Declare/fill a multi linestring</span> 94 <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">multi_linestring</span><span class="special"><</span><span class="identifier">linestring</span><span class="special">></span> <span class="identifier">ml</span><span class="special">;</span> 95 <span class="identifier">boost</span><span class="special">::</span><span class="identifier">geometry</span><span class="special">::</span><span class="identifier">read_wkt</span><span class="special">(</span><span class="string">"MULTILINESTRING((3 5,5 10,7 5),(7 7,11 10,15 7,19 10))"</span><span class="special">,</span> <span class="identifier">ml</span><span class="special">);</span> 96 97 <span class="comment">// Create the buffered geometry with flat ends</span> 98 <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">multi_polygon</span><span class="special"><</span><span class="identifier">polygon</span><span class="special">></span> <span class="identifier">result</span><span class="special">;</span> 99 <span class="identifier">boost</span><span class="special">::</span><span class="identifier">geometry</span><span class="special">::</span><span class="identifier">buffer</span><span class="special">(</span><span class="identifier">ml</span><span class="special">,</span> <span class="identifier">result</span><span class="special">,</span> 100 <span class="identifier">distance_strategy</span><span class="special">,</span> <span class="identifier">side_strategy</span><span class="special">,</span> 101 <span class="identifier">join_strategy</span><span class="special">,</span> <span class="identifier">end_strategy</span><span class="special">,</span> <span class="identifier">point_strategy</span><span class="special">);</span> 102 103 104 <span class="keyword">return</span> <span class="number">0</span><span class="special">;</span> 105<span class="special">}</span> 106</pre> 107<p> 108 </p> 109<h6> 110<a name="geometry.reference.strategies.strategy_buffer_end_flat.h4"></a> 111 <span class="phrase"><a name="geometry.reference.strategies.strategy_buffer_end_flat.output"></a></span><a class="link" href="strategy_buffer_end_flat.html#geometry.reference.strategies.strategy_buffer_end_flat.output">Output</a> 112 </h6> 113<p> 114 <span class="inlinemediaobject"><img src="../../../img/strategies/buffer_end_flat.png" alt="buffer_end_flat"></span> 115 </p> 116<h6> 117<a name="geometry.reference.strategies.strategy_buffer_end_flat.h5"></a> 118 <span class="phrase"><a name="geometry.reference.strategies.strategy_buffer_end_flat.see_also"></a></span><a class="link" href="strategy_buffer_end_flat.html#geometry.reference.strategies.strategy_buffer_end_flat.see_also">See 119 also</a> 120 </h6> 121<div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: disc; "> 122<li class="listitem"> 123 <a class="link" href="../algorithms/buffer/buffer_7_with_strategies.html" title="buffer (with strategies)">buffer 124 (with strategies)</a> 125 </li> 126<li class="listitem"> 127 <a class="link" href="strategy_buffer_end_round.html" title="strategy::buffer::end_round">end_round</a> 128 </li> 129</ul></div> 130</div> 131<table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr> 132<td align="left"></td> 133<td align="right"><div class="copyright-footer">Copyright © 2009-2019 Barend Gehrels, Bruno Lalande, Mateusz Loskot, Adam 134 Wulkiewicz, Oracle and/or its affiliates<p> 135 Distributed under the Boost Software License, Version 1.0. (See accompanying 136 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>) 137 </p> 138</div></td> 139</tr></table> 140<hr> 141<div class="spirit-nav"> 142<a accesskey="p" href="strategy_buffer_end_round.html"><img src="../../../../../../../doc/src/images/prev.png" alt="Prev"></a><a accesskey="u" href="../strategies.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="strategy_buffer_distance_symmetric.html"><img src="../../../../../../../doc/src/images/next.png" alt="Next"></a> 143</div> 144</body> 145</html> 146
