libs/geometry/doc/html/geometry/reference/enumerations/closure_selector.html

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  26 <div class="titlepage"><div><div><h4 class="title">
  27 <a name="geometry.reference.enumerations.closure_selector"></a><a class="link" href="closure_selector.html" title="closure_selector">closure_selector</a>
  28 </h4></div></div></div>
  29 <p>
  30           <a class="indexterm" name="idm46186985397360"></a>
  31 <a class="indexterm" name="idm46186985396544"></a>
  32 <a class="indexterm" name="idm46186985395728"></a>
  33 <a class="indexterm" name="idm46186985394912"></a>
  34 Enumerates options for defining if polygons are open or closed.
  35         </p>
  36 <h6>
  37 <a name="geometry.reference.enumerations.closure_selector.h0"></a>
  38           <span class="phrase"><a name="geometry.reference.enumerations.closure_selector.description"></a></span><a class="link" href="closure_selector.html#geometry.reference.enumerations.closure_selector.description">Description</a>
  39         </h6>
  40 <p>
  41           The enumeration closure_selector describes options for if a polygon is
  42           open or closed. In a closed polygon the very first point (per ring) should
  43           be equal to the very last point. The specific closing property of a polygon
  44           type is defined by the closure metafunction. The closure metafunction defines
  45           a value, which is one of the values enumerated in the closure_selector
  46         </p>
  47 <h6>
  48 <a name="geometry.reference.enumerations.closure_selector.h1"></a>
  49           <span class="phrase"><a name="geometry.reference.enumerations.closure_selector.synopsis"></a></span><a class="link" href="closure_selector.html#geometry.reference.enumerations.closure_selector.synopsis">Synopsis</a>
  50         </h6>
  51 <p>
  52 </p>
  53 <pre class="programlisting"><span class="keyword">enum</span> <span class="identifier">closure_selector</span> <span class="special">{</span><span class="identifier">open</span> <span class="special">=</span> <span class="number">0</span><span class="special">,</span> <span class="identifier">closed</span> <span class="special">=</span> <span class="number">1</span><span class="special">,</span> <span class="identifier">closure_undertermined</span> <span class="special">=</span> <span class="special">-</span><span class="number">1</span><span class="special">};</span></pre>
  54 <p>
  55         </p>
  56 <h6>
  57 <a name="geometry.reference.enumerations.closure_selector.h2"></a>
  58           <span class="phrase"><a name="geometry.reference.enumerations.closure_selector.values"></a></span><a class="link" href="closure_selector.html#geometry.reference.enumerations.closure_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                     open
  82                   </p>
  83                 </td>
  84 <td>
  85                   <p>
  86                     Rings are open: first point and last point are different, algorithms
  87                     close them explicitly on the fly
  88                   </p>
  89                 </td>
  90 </tr>
  91 <tr>
  92 <td>
  93                   <p>
  94                     closed
  95                   </p>
  96                 </td>
  97 <td>
  98                   <p>
  99                     Rings are closed: first point and last point must be the same.
 100                   </p>
 101                 </td>
 102 </tr>
 103 <tr>
 104 <td>
 105                   <p>
 106                     closure_undertermined
 107                   </p>
 108                 </td>
 109 <td>
 110                   <p>
 111                     (Not yet implemented): algorithms first figure out if ring must
 112                     be closed on the fly
 113                   </p>
 114                 </td>
 115 </tr>
 116 </tbody>
 117 </table></div>
 118 <h6>
 119 <a name="geometry.reference.enumerations.closure_selector.h3"></a>
 120           <span class="phrase"><a name="geometry.reference.enumerations.closure_selector.header"></a></span><a class="link" href="closure_selector.html#geometry.reference.enumerations.closure_selector.header">Header</a>
 121         </h6>
 122 <p>
 123           Either
 124         </p>
 125 <p>
 126           <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">hpp</span><span class="special">&gt;</span></code>
 127         </p>
 128 <p>
 129           Or
 130         </p>
 131 <p>
 132           <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">core</span><span class="special">/</span><span class="identifier">closure</span><span class="special">.</span><span class="identifier">hpp</span><span class="special">&gt;</span></code>
 133         </p>
 134 <h6>
 135 <a name="geometry.reference.enumerations.closure_selector.h4"></a>
 136           <span class="phrase"><a name="geometry.reference.enumerations.closure_selector.see_also"></a></span><a class="link" href="closure_selector.html#geometry.reference.enumerations.closure_selector.see_also">See
 137           also</a>
 138         </h6>
 139 <p>
 140           <a class="link" href="../core/closure.html" title="closure">The closure metafunction</a>
 141         </p>
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 144 <td align="left"></td>
 145 <td align="right"><div class="copyright-footer">Copyright &#169; 2009-2019 Barend Gehrels, Bruno Lalande, Mateusz Loskot, Adam
 146       Wulkiewicz, Oracle and/or its affiliates<p>
 147         Distributed under the Boost Software License, Version 1.0. (See accompanying
 148         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>)
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