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  1. <?xml version="1.0" encoding="UTF-8" standalone="no"?>
  2. <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
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  4.   <head>
  5.     <meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />
  6.     <title>8.8.¬† Polar Coords</title>
  7.     <link rel="stylesheet" href="gimp-help-plain.css" type="text/css" />
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  12.     <link rel="start" href="index.html" title="GNU Image Manipulation Program" />
  13.     <link rel="up" href="filters-distort.html" title="8.¬† Distort Filters" />
  14.     <link rel="prev" href="plug-in-lens-distortion.html" title="8.7.¬† Lens Distortion" />
  15.     <link rel="next" href="plug-in-emboss.html" title="8.9.¬† Emboss" />
  16.   </head>
  17.   <body>
  18.     <div class="navheader">
  19.       <table width="100%" summary="Navigation header">
  20.         <tr>
  21.           <th colspan="3" align="center">8.8.¬†
  22.     <span lang="en" xml:lang="en">Polar Coords</span>
  23.   </th>
  24.         </tr>
  25.         <tr>
  26.           <td width="20%" align="left"><a accesskey="p" href="plug-in-lens-distortion.html"><img src="../images/prev.png" alt="Prev" /></a>¬†</td>
  27.           <th width="60%" align="center">8.¬†
  28.     <span lang="en" xml:lang="en">Distort Filters</span>
  29.   </th>
  30.           <td width="20%" align="right">¬†<a accesskey="n" href="plug-in-emboss.html"><img src="../images/next.png" alt="Next" /></a></td>
  31.         </tr>
  32.       </table>
  33.       <hr />
  34.     </div>
  35.     <div class="sect2" lang="en" xml:lang="en">
  36.       <div class="titlepage">
  37.         <div>
  38.           <div>
  39.             <h3 class="title"><a id="plug-in-polar-coords"></a>8.8.¬†
  40.     <span lang="en" xml:lang="en">Polar Coords</span>
  41.   </h3>
  42.           </div>
  43.         </div>
  44.       </div>
  45.       <a id="id2751218" class="indexterm"></a>
  46.       <a id="id2751236" class="indexterm"></a>
  47.       <div class="sect3" lang="en" xml:lang="en">
  48.         <div class="titlepage">
  49.           <div>
  50.             <div>
  51.               <h4 class="title"><a id="id2751245"></a>8.8.1.¬†
  52.       <span lang="en" xml:lang="en">Overview</span>
  53.     </h4>
  54.             </div>
  55.           </div>
  56.         </div>
  57.         <div class="figure">
  58.           <a id="id2751256"></a>
  59.           <p class="title">
  60.             <b>Figure¬†16.121.¬†
  61.         <span lang="en" xml:lang="en">Example for Polar Coords filter</span>
  62.       </b>
  63.           </p>
  64.           <div class="figure-contents">
  65.             <div class="mediaobject">
  66.               <img src="../images/filters/examples/taj_orig.jpg" alt="Example for Polar Coords filter" />
  67.               <div class="caption">
  68.                 <p>Original image</p>
  69.               </div>
  70.             </div>
  71.             <div class="mediaobject">
  72.               <img src="../images/filters/examples/distort-taj-polarcoords.jpg" alt="Example for Polar Coords filter" />
  73.               <div class="caption">
  74.                 <p>‚Äú<span class="quote">Polar Coords</span>‚Äù filter applied</p>
  75.               </div>
  76.             </div>
  77.           </div>
  78.         </div>
  79.         <br class="figure-break" />
  80.         <p>
  81.       It gives a circular or a rectangular representation of your image with
  82.       all the possible intermediates between both.
  83.     </p>
  84.       </div>
  85.       <div class="sect3" lang="en" xml:lang="en">
  86.         <div class="titlepage">
  87.           <div>
  88.             <div>
  89.               <h4 class="title"><a id="id2751332"></a>8.8.2.¬†
  90.       <span lang="en" xml:lang="en">Activate the filter</span>
  91.     </h4>
  92.             </div>
  93.           </div>
  94.         </div>
  95.         <p>
  96.       You can find this filter through
  97.       <span class="guimenu">Filters</span> ‚Üí <span class="guisubmenu">Distorts</span> ‚Üí <span class="guimenuitem">P<span class="accel">o</span>lar Coords</span>.
  98.     </p>
  99.       </div>
  100.       <div class="sect3" lang="en" xml:lang="en">
  101.         <div class="titlepage">
  102.           <div>
  103.             <div>
  104.               <h4 class="title"><a id="id2751376"></a>8.8.3.¬†
  105.       <span lang="en" xml:lang="en">Options</span>
  106.     </h4>
  107.             </div>
  108.           </div>
  109.         </div>
  110.         <div class="figure">
  111.           <a id="id2751387"></a>
  112.           <p class="title">
  113.             <b>Figure¬†16.122.¬†
  114.         <span lang="en" xml:lang="en">‚Äú<span class="quote">Polar Coords</span>‚Äù filter options</span>
  115.       </b>
  116.           </p>
  117.           <div class="figure-contents">
  118.             <div class="mediaobject">
  119.               <img src="../images/filters/filters-distort-polarcoords.png" alt="Polar Coords filter options" />
  120.             </div>
  121.           </div>
  122.         </div>
  123.         <br class="figure-break" />
  124.         <div class="variablelist">
  125.           <dl>
  126.             <dt>
  127.               <span class="term">Preview</span>
  128.             </dt>
  129.             <dd>
  130.               <p>
  131.             The result of your settings will appear in the Preview without
  132.             affecting the image until you click on <span class="guibutton">OK</span>.
  133.           </p>
  134.             </dd>
  135.             <dt>
  136.               <span class="term">Circle Depth in Percent</span>
  137.             </dt>
  138.             <dd>
  139.               <p>
  140.             Slider and input box allow you to set the "circularity" of the
  141.             transformation, from rectangle (0%) to circle (100%).
  142.           </p>
  143.             </dd>
  144.             <dt>
  145.               <span class="term">Offset Angle</span>
  146.             </dt>
  147.             <dd>
  148.               <p>
  149.             This option controls the angle the drawing will start from
  150.             (0 - 359¬∞), and so turns it around the circle center.
  151.           </p>
  152.             </dd>
  153.             <dt>
  154.               <span class="term">Map Backwards</span>
  155.             </dt>
  156.             <dd>
  157.               <p>
  158.             When this option is checked, the drawing will start from the
  159.             right instead of the left.
  160.           </p>
  161.             </dd>
  162.             <dt>
  163.               <span class="term">Map from Top</span>
  164.             </dt>
  165.             <dd>
  166.               <p>
  167.             If unchecked, the mapping will put the bottom row in the middle
  168.             and the top row on the outside. If checked, it will be the
  169.             opposite.
  170.           </p>
  171.             </dd>
  172.             <dt>
  173.               <span class="term">To Polar</span>
  174.             </dt>
  175.             <dd>
  176.               <p>
  177.             If unchecked, the image will be circularly mapped into a rectangle
  178.             (odd effect). If checked, the image will be mapped into a circle.
  179.           </p>
  180.             </dd>
  181.           </dl>
  182.         </div>
  183.       </div>
  184.       <div class="sect3" lang="en" xml:lang="en">
  185.         <div class="titlepage">
  186.           <div>
  187.             <div>
  188.               <h4 class="title"><a id="id2751550"></a>8.8.4.¬†
  189.       <span lang="en" xml:lang="en">Examples</span>
  190.     </h4>
  191.             </div>
  192.           </div>
  193.         </div>
  194.         <div class="figure">
  195.           <a id="id2751561"></a>
  196.           <p class="title">
  197.             <b>Figure¬†16.123.¬†
  198.         <span lang="en" xml:lang="en">With text</span>
  199.       </b>
  200.           </p>
  201.           <div class="figure-contents">
  202.             <div class="mediaobject">
  203.               <img src="../images/filters/examples/polcoords1.png" alt="With text" />
  204.               <div class="caption">
  205.                 <p>
  206.             If you have just written the text, you must Flatten the
  207.             image before using the filter.
  208.           </p>
  209.               </div>
  210.             </div>
  211.           </div>
  212.         </div>
  213.         <br class="figure-break" />
  214.         <div class="figure">
  215.           <a id="id2751599"></a>
  216.           <p class="title">
  217.             <b>Figure¬†16.124.¬†
  218.         <span lang="en" xml:lang="en">With two horizontal bars</span>
  219.       </b>
  220.           </p>
  221.           <div class="figure-contents">
  222.             <div class="mediaobject">
  223.               <img src="../images/filters/examples/polcoords2.png" alt="With two horizontal bars" />
  224.             </div>
  225.           </div>
  226.         </div>
  227.         <br class="figure-break" />
  228.       </div>
  229.     </div>
  230.     <div class="navfooter">
  231.       <hr />
  232.       <table width="100%" summary="Navigation footer">
  233.         <tr>
  234.           <td width="40%" align="left"><a accesskey="p" href="plug-in-lens-distortion.html"><img src="../images/prev.png" alt="Prev" /></a>¬†</td>
  235.           <td width="20%" align="center">
  236.             <a accesskey="u" href="filters-distort.html">
  237.               <img src="../images/up.png" alt="Up" />
  238.             </a>
  239.           </td>
  240.           <td width="40%" align="right">¬†<a accesskey="n" href="plug-in-emboss.html"><img src="../images/next.png" alt="Next" /></a></td>
  241.         </tr>
  242.         <tr>
  243.           <td width="40%" align="left" valign="top"><a accesskey="p" href="plug-in-lens-distortion.html">8.7.¬†
  244.     <span lang="en" xml:lang="en">Lens Distortion</span>
  245.   </a>¬†</td>
  246.           <td width="20%" align="center">
  247.             <a accesskey="h" href="index.html">
  248.               <img src="../images/home.png" alt="Home" />
  249.             </a>
  250.           </td>
  251.           <td width="40%" align="right" valign="top">¬†<a accesskey="n" href="plug-in-emboss.html">8.9.¬†
  252.     <span lang="en" xml:lang="en">Emboss</span>
  253.   </a></td>
  254.         </tr>
  255.       </table>
  256.     </div>
  257.   </body>
  258. </html>
  259.