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  26 <div class="titlepage"><div><div><h4 class="title">
  27 <a name="geometry.reference.strategies.strategy_buffer_end_round"></a><a class="link" href="strategy_buffer_end_round.html" title="strategy::buffer::end_round">strategy::buffer::end_round</a>
  28 </h4></div></div></div>
  29 <p>
  30           <a class="indexterm" name="idp121251184"></a><a class="indexterm" name="idp121251872"></a><a class="indexterm" name="idp121252560"></a>
  31 Let the buffer create rounded ends.
  32         </p>
  33 <h6>
  34 <a name="geometry.reference.strategies.strategy_buffer_end_round.h0"></a>
  35           <span class="phrase"><a name="geometry.reference.strategies.strategy_buffer_end_round.description"></a></span><a class="link" href="strategy_buffer_end_round.html#geometry.reference.strategies.strategy_buffer_end_round.description">Description</a>
  36         </h6>
  37 <p>
  38           This strategy can be used as EndStrategy for the buffer algorithm. It creates
  39           a rounded 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_round.h1"></a>
  45           <span class="phrase"><a name="geometry.reference.strategies.strategy_buffer_end_round.synopsis"></a></span><a class="link" href="strategy_buffer_end_round.html#geometry.reference.strategies.strategy_buffer_end_round.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_round</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_round.h2"></a>
  58           <span class="phrase"><a name="geometry.reference.strategies.strategy_buffer_end_round.constructor_s_"></a></span><a class="link" href="strategy_buffer_end_round.html#geometry.reference.strategies.strategy_buffer_end_round.constructor_s_">Constructor(s)</a>
  59         </h6>
  60 <div class="informaltable"><table class="table">
  61 <colgroup>
  62 <col>
  63 <col>
  64 <col>
  65 </colgroup>
  66 <thead><tr>
  67 <th>
  68                   <p>
  69                     Function
  70                   </p>
  71                 </th>
  72 <th>
  73                   <p>
  74                     Description
  75                   </p>
  76                 </th>
  77 <th>
  78                   <p>
  79                     Parameters
  80                   </p>
  81                 </th>
  82 </tr></thead>
  83 <tbody><tr>
  84 <td>
  85                   <p>
  86 </p>
  87 <pre xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" class="table-programlisting"><span class="identifier">end_round</span><span class="special">(</span><span class="identifier">std</span><span class="special">::</span><span class="identifier">size_t</span> <span class="identifier">points_per_circle</span> <span class="special">=</span> <span class="number">90</span><span class="special">)</span></pre>
  88 <p>
  89                   </p>
  90                 </td>
  91 <td>
  92                   <p>
  93                     Constructs the strategy.
  94                   </p>
  95                 </td>
  96 <td>
  97                   <p>
  98                     <span class="bold"><strong>std::size_t</strong></span>: <span class="emphasis"><em>points_per_circle</em></span>:
  99                     points which would be used for a full circle (if points_per_circle
 100                     is smaller than 4, it is internally set to 4)
 101                   </p>
 102                 </td>
 103 </tr></tbody>
 104 </table></div>
 105 <h6>
 106 <a name="geometry.reference.strategies.strategy_buffer_end_round.h3"></a>
 107           <span class="phrase"><a name="geometry.reference.strategies.strategy_buffer_end_round.header"></a></span><a class="link" href="strategy_buffer_end_round.html#geometry.reference.strategies.strategy_buffer_end_round.header">Header</a>
 108         </h6>
 109 <p>
 110           <code class="computeroutput"><span class="preprocessor">#include</span> <span class="special">&lt;</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_round</span><span class="special">.</span><span class="identifier">hpp</span><span class="special">&gt;</span></code>
 111         </p>
 112 <h6>
 113 <a name="geometry.reference.strategies.strategy_buffer_end_round.h4"></a>
 114           <span class="phrase"><a name="geometry.reference.strategies.strategy_buffer_end_round.example"></a></span><a class="link" href="strategy_buffer_end_round.html#geometry.reference.strategies.strategy_buffer_end_round.example">Example</a>
 115         </h6>
 116 <p>
 117           Shows how the end_round strategy can be used as a EndStrategy to create
 118           rounded ends
 119         </p>
 120 <p>
 121 </p>
 122 <pre class="programlisting"><span class="preprocessor">#include</span> <span class="special">&lt;</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">&gt;</span>
 123 <span class="preprocessor">#include</span> <span class="special">&lt;</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">&gt;</span>
 124 <span class="preprocessor">#include</span> <span class="special">&lt;</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">&gt;</span>
 125
 126
 127 <span class="keyword">int</span> <span class="identifier">main</span><span class="special">()</span>
 128 <span class="special">{</span>
 129     <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">&lt;</span><span class="keyword">double</span><span class="special">&gt;</span> <span class="identifier">point</span><span class="special">;</span>
 130     <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">&lt;</span><span class="identifier">point</span><span class="special">&gt;</span> <span class="identifier">linestring</span><span class="special">;</span>
 131     <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">&lt;</span><span class="identifier">point</span><span class="special">&gt;</span> <span class="identifier">polygon</span><span class="special">;</span>
 132
 133     <span class="comment">// Declare the round-end strategy with 36 points for a full circle</span>
 134     <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_round</span> <span class="identifier">end_strategy</span><span class="special">(</span><span class="number">36</span><span class="special">);</span>
 135
 136     <span class="comment">// Declare other strategies</span>
 137     <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">&lt;</span><span class="keyword">double</span><span class="special">&gt;</span> <span class="identifier">distance_strategy</span><span class="special">(</span><span class="number">1.0</span><span class="special">);</span>
 138     <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>
 139     <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>
 140     <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>
 141
 142     <span class="comment">// Declare/fill a multi linestring</span>
 143     <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">&lt;</span><span class="identifier">linestring</span><span class="special">&gt;</span> <span class="identifier">ml</span><span class="special">;</span>
 144     <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>
 145
 146     <span class="comment">// Create the buffered geometry with rounded ends</span>
 147     <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">&lt;</span><span class="identifier">polygon</span><span class="special">&gt;</span> <span class="identifier">result</span><span class="special">;</span>
 148     <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>
 149                 <span class="identifier">distance_strategy</span><span class="special">,</span> <span class="identifier">side_strategy</span><span class="special">,</span>
 150                 <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>
 151
 152
 153     <span class="keyword">return</span> <span class="number">0</span><span class="special">;</span>
 154 <span class="special">}</span>
 155 </pre>
 156 <p>
 157         </p>
 158 <h6>
 159 <a name="geometry.reference.strategies.strategy_buffer_end_round.h5"></a>
 160           <span class="phrase"><a name="geometry.reference.strategies.strategy_buffer_end_round.output"></a></span><a class="link" href="strategy_buffer_end_round.html#geometry.reference.strategies.strategy_buffer_end_round.output">Output</a>
 161         </h6>
 162 <p>
 163           <span class="inlinemediaobject"><img src="../../../img/strategies/buffer_end_round.png" alt="buffer_end_round"></span>
 164         </p>
 165 <h6>
 166 <a name="geometry.reference.strategies.strategy_buffer_end_round.h6"></a>
 167           <span class="phrase"><a name="geometry.reference.strategies.strategy_buffer_end_round.see_also"></a></span><a class="link" href="strategy_buffer_end_round.html#geometry.reference.strategies.strategy_buffer_end_round.see_also">See
 168           also</a>
 169         </h6>
 170 <div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: disc; ">
 171 <li class="listitem">
 172               <a class="link" href="../algorithms/buffer/buffer_7_with_strategies.html" title="buffer (with strategies)">buffer
 173               (with strategies)</a>
 174             </li>
 175 <li class="listitem">
 176               <a class="link" href="strategy_buffer_end_flat.html" title="strategy::buffer::end_flat">end_flat</a>
 177             </li>
 178 </ul></div>
 179 </div>
 180 <table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr>
 181 <td align="left"></td>
 182 <td align="right"><div class="copyright-footer">Copyright &#169; 2009-2017 Barend
 183       Gehrels, Bruno Lalande, Mateusz Loskot, Adam Wulkiewicz, Oracle and/or its
 184       affiliates<p>
 185         Distributed under the Boost Software License, Version 1.0. (See accompanying
 186         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>)
 187       </p>
 188 </div></td>
 189 </tr></table>
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