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  6.     <title>11.6.¬† Diffraction Patterns</title>
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  21.           <th colspan="3" align="center">11.6.¬†
  22.     <span lang="en" xml:lang="en">Diffraction Patterns</span>
  23.   </th>
  24.         </tr>
  25.         <tr>
  26.           <td width="20%" align="left"><a accesskey="p" href="plug-in-ifsfractal.html"><img src="../images/prev.png" alt="Prev" /></a>¬†</td>
  27.           <th width="60%" align="center">11.¬†
  28.     <span lang="en" xml:lang="en">Rendering Filters</span>
  29.   </th>
  30.           <td width="20%" align="right">¬†<a accesskey="n" href="plug-in-cml-explorer.html"><img src="../images/next.png" alt="Next" /></a></td>
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  37.         <div>
  38.           <div>
  39.             <h3 class="title"><a id="plug-in-diffraction"></a>11.6.¬†
  40.     <span lang="en" xml:lang="en">Diffraction Patterns</span>
  41.   </h3>
  42.           </div>
  43.           <div>
  44.             <div class="revhistory">
  45.               <table border="1" width="100%" summary="Revision history">
  46.                 <tr>
  47.                   <th align="left" valign="top" colspan="3">
  48.                     <b>Revision History</b>
  49.                   </th>
  50.                 </tr>
  51.                 <tr>
  52.                   <td align="left">Revision $Revision: 2191 $</td>
  53.                   <td align="left">2006-12-13</td>
  54.                   <td align="left">j.h</td>
  55.                 </tr>
  56.               </table>
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  64.         <img src="../images/filters/filters-render-diffraction.png" />
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  66.       <div class="sect3" lang="en" xml:lang="en">
  67.         <div class="titlepage">
  68.           <div>
  69.             <div>
  70.               <h4 class="title"><a id="id2771589"></a>11.6.1.¬†
  71.       <span lang="en" xml:lang="en">Overview</span>
  72.     </h4>
  73.             </div>
  74.           </div>
  75.         </div>
  76.         <div class="figure">
  77.           <a id="id2771600"></a>
  78.           <p class="title">
  79.             <b>Figure¬†16.243.¬†
  80.         <span lang="en" xml:lang="en">Two examples of diffraction patterns.</span>
  81.       </b>
  82.           </p>
  83.           <div class="figure-contents">
  84.             <div class="mediaobject">
  85.               <img src="../images/filters/examples/diffraction1.png" alt="Two examples of diffraction patterns." />
  86.             </div>
  87.             <div class="mediaobject">
  88.               <img src="../images/filters/examples/diffraction2.png" alt="Two examples of diffraction patterns." />
  89.             </div>
  90.           </div>
  91.         </div>
  92.         <br class="figure-break" />
  93.         <p>
  94.       You can find this filter through
  95.       <span class="guimenu">Filters</span> ‚Üí <span class="guisubmenu">Render</span> ‚Üí <span class="guisubmenu">Patterns</span> ‚Üí <span class="guimenuitem"><span class="accel">D</span>iffraction Patterns</span>.
  96.     </p>
  97.         <p>
  98.       This filter lets you make diffraction or wave interference textures.
  99.       You can change the Frequency, Contours and Sharp Edges for each of the
  100.       RGB  channels. You can also set Brightness, Scattering and Polarization
  101.       of the texture. There is no automatic preview, so you must press the
  102.       preview button to update. On a slow system, this may take a bit of
  103.       time. Note that result doesn't depend on the initial image.
  104.     </p>
  105.         <p>
  106.       This is a very useful filter if you want to create intricate patterns.
  107.       It's perfect for making psychedelic, batik-like textures, or for
  108.       imitating patterns in stained glass (as in a church window).
  109.     </p>
  110.         <p>
  111.       It seems clear that the plugin works by simulating the physics of light
  112.       striking a grating. Unfortunately, the original authors never got around
  113.       to writing down the theory behind it, or explaining what the parameters
  114.       mean. The best approach, then, is just to twiddle things and see what
  115.       happens. Fortunately, almost anything you do seems to produce
  116.       interesting results.
  117.     </p>
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  124.           <td width="40%" align="left"><a accesskey="p" href="plug-in-ifsfractal.html"><img src="../images/prev.png" alt="Prev" /></a>¬†</td>
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  129.           </td>
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  131.         </tr>
  132.         <tr>
  133.           <td width="40%" align="left" valign="top"><a accesskey="p" href="plug-in-ifsfractal.html">11.5.¬†
  134.     <span lang="en" xml:lang="en">IFS Fractal</span>
  135.   </a>¬†</td>
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  140.           </td>
  141.           <td width="40%" align="right" valign="top">¬†<a accesskey="n" href="plug-in-cml-explorer.html">11.7.¬†
  142.     <span lang="en" xml:lang="en">CML Explorer</span>
  143.   </a></td>
  144.         </tr>
  145.       </table>
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