libs/geometry/doc/html/geometry/reference/algorithms/make/make_inverse.html

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  26 <div class="titlepage"><div><div><h5 class="title">
  27 <a name="geometry.reference.algorithms.make.make_inverse"></a><a class="link" href="make_inverse.html" title="make_inverse">make_inverse</a>
  28 </h5></div></div></div>
  29 <p>
  30             <a class="indexterm" name="idm46186994163648"></a>
  31 Construct a box with inverse infinite coordinates.
  32           </p>
  33 <h6>
  34 <a name="geometry.reference.algorithms.make.make_inverse.h0"></a>
  35             <span class="phrase"><a name="geometry.reference.algorithms.make.make_inverse.description"></a></span><a class="link" href="make_inverse.html#geometry.reference.algorithms.make.make_inverse.description">Description</a>
  36           </h6>
  37 <p>
  38             The make_inverse function initializes a 2D or 3D box with large coordinates,
  39             the min corner is very large, the max corner is very small. This is useful
  40             e.g. in combination with the expand function, to determine the bounding
  41             box of a series of geometries.
  42           </p>
  43 <h6>
  44 <a name="geometry.reference.algorithms.make.make_inverse.h1"></a>
  45             <span class="phrase"><a name="geometry.reference.algorithms.make.make_inverse.synopsis"></a></span><a class="link" href="make_inverse.html#geometry.reference.algorithms.make.make_inverse.synopsis">Synopsis</a>
  46           </h6>
  47 <p>
  48 </p>
  49 <pre class="programlisting"><span class="keyword">template</span><span class="special">&lt;</span><span class="keyword">typename</span> <span class="identifier">Geometry</span><span class="special">&gt;</span>
  50 <span class="identifier">Geometry</span> <span class="identifier">make_inverse</span><span class="special">()</span></pre>
  51 <p>
  52           </p>
  53 <h6>
  54 <a name="geometry.reference.algorithms.make.make_inverse.h2"></a>
  55             <span class="phrase"><a name="geometry.reference.algorithms.make.make_inverse.parameters"></a></span><a class="link" href="make_inverse.html#geometry.reference.algorithms.make.make_inverse.parameters">Parameters</a>
  56           </h6>
  57 <div class="informaltable"><table class="table">
  58 <colgroup>
  59 <col>
  60 <col>
  61 <col>
  62 <col>
  63 </colgroup>
  64 <thead><tr>
  65 <th>
  66                     <p>
  67                       Type
  68                     </p>
  69                   </th>
  70 <th>
  71                     <p>
  72                       Concept
  73                     </p>
  74                   </th>
  75 <th>
  76                     <p>
  77                       Name
  78                     </p>
  79                   </th>
  80 <th>
  81                     <p>
  82                       Description
  83                     </p>
  84                   </th>
  85 </tr></thead>
  86 <tbody><tr>
  87 <td>
  88                     <p>
  89                       Geometry
  90                     </p>
  91                   </td>
  92 <td>
  93                     <p>
  94                       Any type fulfilling a Geometry Concept
  95                     </p>
  96                   </td>
  97 <td>
  98                     <p>
  99                       -
 100                     </p>
 101                   </td>
 102 <td>
 103                     <p>
 104                       Must be specified
 105                     </p>
 106                   </td>
 107 </tr></tbody>
 108 </table></div>
 109 <h6>
 110 <a name="geometry.reference.algorithms.make.make_inverse.h3"></a>
 111             <span class="phrase"><a name="geometry.reference.algorithms.make.make_inverse.returns"></a></span><a class="link" href="make_inverse.html#geometry.reference.algorithms.make.make_inverse.returns">Returns</a>
 112           </h6>
 113 <p>
 114             The constructed geometry, here: a box
 115           </p>
 116 <h6>
 117 <a name="geometry.reference.algorithms.make.make_inverse.h4"></a>
 118             <span class="phrase"><a name="geometry.reference.algorithms.make.make_inverse.header"></a></span><a class="link" href="make_inverse.html#geometry.reference.algorithms.make.make_inverse.header">Header</a>
 119           </h6>
 120 <p>
 121             Either
 122           </p>
 123 <p>
 124             <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>
 125           </p>
 126 <p>
 127             Or
 128           </p>
 129 <p>
 130             <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">algorithms</span><span class="special">/</span><span class="identifier">make</span><span class="special">.</span><span class="identifier">hpp</span><span class="special">&gt;</span></code>
 131           </p>
 132 <h6>
 133 <a name="geometry.reference.algorithms.make.make_inverse.h5"></a>
 134             <span class="phrase"><a name="geometry.reference.algorithms.make.make_inverse.example"></a></span><a class="link" href="make_inverse.html#geometry.reference.algorithms.make.make_inverse.example">Example</a>
 135           </h6>
 136 <p>
 137             Usage of make_inverse and expand to conveniently determine bounding box
 138             of several objects
 139           </p>
 140 <p>
 141 </p>
 142 <pre class="programlisting"><span class="preprocessor">#include</span> <span class="special">&lt;</span><span class="identifier">iostream</span><span class="special">&gt;</span>
 143
 144 <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>
 145 <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">box</span><span class="special">.</span><span class="identifier">hpp</span><span class="special">&gt;</span>
 146 <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>
 147
 148 <span class="keyword">using</span> <span class="keyword">namespace</span> <span class="identifier">boost</span><span class="special">::</span><span class="identifier">geometry</span><span class="special">;</span>
 149
 150 <span class="keyword">int</span> <span class="identifier">main</span><span class="special">()</span>
 151 <span class="special">{</span>
 152
 153     <span class="keyword">typedef</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>
 154     <span class="keyword">typedef</span> <span class="identifier">model</span><span class="special">::</span><span class="identifier">box</span><span class="special">&lt;</span><span class="identifier">point</span><span class="special">&gt;</span> <span class="identifier">box</span><span class="special">;</span>
 155
 156     <span class="identifier">box</span> <span class="identifier">all</span> <span class="special">=</span> <span class="identifier">make_inverse</span><span class="special">&lt;</span><span class="identifier">box</span><span class="special">&gt;();</span>
 157     <span class="identifier">std</span><span class="special">::</span><span class="identifier">cout</span> <span class="special">&lt;&lt;</span> <span class="identifier">dsv</span><span class="special">(</span><span class="identifier">all</span><span class="special">)</span> <span class="special">&lt;&lt;</span> <span class="identifier">std</span><span class="special">::</span><span class="identifier">endl</span><span class="special">;</span>
 158     <span class="identifier">expand</span><span class="special">(</span><span class="identifier">all</span><span class="special">,</span> <span class="identifier">make</span><span class="special">&lt;</span><span class="identifier">box</span><span class="special">&gt;(</span><span class="number">0</span><span class="special">,</span> <span class="number">0</span><span class="special">,</span> <span class="number">3</span><span class="special">,</span> <span class="number">4</span><span class="special">));</span>
 159     <span class="identifier">expand</span><span class="special">(</span><span class="identifier">all</span><span class="special">,</span> <span class="identifier">make</span><span class="special">&lt;</span><span class="identifier">box</span><span class="special">&gt;(</span><span class="number">2</span><span class="special">,</span> <span class="number">2</span><span class="special">,</span> <span class="number">5</span><span class="special">,</span> <span class="number">6</span><span class="special">));</span>
 160     <span class="identifier">std</span><span class="special">::</span><span class="identifier">cout</span> <span class="special">&lt;&lt;</span> <span class="identifier">dsv</span><span class="special">(</span><span class="identifier">all</span><span class="special">)</span> <span class="special">&lt;&lt;</span> <span class="identifier">std</span><span class="special">::</span><span class="identifier">endl</span><span class="special">;</span>
 161
 162     <span class="keyword">return</span> <span class="number">0</span><span class="special">;</span>
 163 <span class="special">}</span>
 164 </pre>
 165 <p>
 166           </p>
 167 <p>
 168             Output:
 169           </p>
 170 <pre class="programlisting">((1.79769e+308, 1.79769e+308), (-1.79769e+308, -1.79769e+308))
 171 ((0, 0), (5, 6))
 172 </pre>
 173 <h6>
 174 <a name="geometry.reference.algorithms.make.make_inverse.h6"></a>
 175             <span class="phrase"><a name="geometry.reference.algorithms.make.make_inverse.see_also"></a></span><a class="link" href="make_inverse.html#geometry.reference.algorithms.make.make_inverse.see_also">See
 176             also</a>
 177           </h6>
 178 <div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: disc; "><li class="listitem">
 179                 <a class="link" href="../assign/assign_inverse.html" title="assign_inverse">assign_inverse</a>
 180               </li></ul></div>
 181 </div>
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 184 <td align="right"><div class="copyright-footer">Copyright &#169; 2009-2019 Barend Gehrels, Bruno Lalande, Mateusz Loskot, Adam
 185       Wulkiewicz, Oracle and/or its affiliates<p>
 186         Distributed under the Boost Software License, Version 1.0. (See accompanying
 187         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>)
 188       </p>
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