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  4.   <head>
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  6.     <title>9.3.┬áGflare</title>
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  11.     <link rel="up" href="ch06s09.html" title="9.┬áLight Effects filters" />
  12.     <link rel="prev" href="ch06s09s02.html" title="9.2.┬áFlareFX" />
  13.     <link rel="next" href="ch06s09s04.html" title="9.4.┬áLighting Effects" />
  14.   </head>
  15.   <body>
  16.     <div xmlns="" class="navheader">
  17.       <table width="100%" summary="Navigation header">
  18.         <tr>
  19.           <th colspan="3" align="center" id="chaptername">9.┬áLight Effects filters</th>
  20.         </tr>
  21.         <tr>
  22.           <td width="20%" align="left"><a accesskey="p" href="ch06s09s02.html">Prev</a>┬á</td>
  23.           <th width="60%" align="center" id="sectionname">9.3.┬áGflare</th>
  24.           <td width="20%" align="right">┬á<a accesskey="n" href="ch06s09s04.html">Next</a></td>
  25.         </tr>
  26.       </table>
  27.       <hr />
  28.     </div>
  29.     <div class="sect2" lang="en" xml:lang="en">
  30.       <div class="titlepage">
  31.         <div>
  32.           <div>
  33.             <h3 class="title"><a id="plug-in-Gflare"></a>9.3.┬áGflare</h3>
  34.           </div>
  35.         </div>
  36.       </div>
  37.       <a id="id3481273" class="indexterm"></a>
  38.       <div class="mediaobject">
  39.         <img src="../images/filters/filters-light-gflare.png" />
  40.       </div>
  41.       <div class="simplesect" lang="en" xml:lang="en">
  42.         <div class="titlepage">
  43.           <div>
  44.             <div>
  45.               <h4 class="title"><a id="id3481294"></a>Overview</h4>
  46.             </div>
  47.           </div>
  48.         </div>
  49.         <p>
  50.       This filter is found in 
  51.       <span class="guimenuitem">Image>Filters/Light Effects/<span class="accel">G</span>flare</span>.
  52.     </p>
  53.         <p>
  54.       Gflare effect reminds the effect you get when you take a photograph of a blinding 
  55.       light source, with a halo and radiations around the source. The Gflare image has 
  56.       three components: <span class="emphasis"><em>Glow</em></span> which is the big central fireball, 
  57.       <span class="emphasis"><em>Rays</em></span> and 
  58.       <span class="emphasis"><em>Second Flares</em></span>  
  59.     </p>
  60.       </div>
  61.       <div class="simplesect" lang="en" xml:lang="en">
  62.         <div class="titlepage">
  63.           <div>
  64.             <div>
  65.               <h4 class="title"><a id="id3481339"></a>Preview</h4>
  66.             </div>
  67.           </div>
  68.         </div>
  69.         <p>
  70.           When <span class="guilabel">Auto Update Preview</span> is checked, parameter setting results are 
  71.           interactively displayed in preview without modifying the image until you click on 
  72.           <span class="guilabel">OK</span> button.
  73.         </p>
  74.       </div>
  75.       <div class="simplesect" lang="en" xml:lang="en">
  76.         <div class="titlepage">
  77.           <div>
  78.             <div>
  79.               <h4 class="title"><a id="id3481366"></a>Settings</h4>
  80.             </div>
  81.           </div>
  82.         </div>
  83.         <p>
  84.       The Settings tab allows you to set manually the parameters while the Selector tab let you 
  85.       choose presets in a list.
  86.     </p>
  87.         <p>
  88.       <span class="guilabel">Center</span>:  You can set there X and Y (pixels) coordinates of glint. 
  89.       The coordinate origin is at upper left corner 
  90.     </p>
  91.         <p>
  92.       <span class="guilabel">Radius</span>: The radius of the effect. Don't be affraid to use the box with the
  93.       digits instead the slider a bit limited.
  94.     </p>
  95.         <p>
  96.       <span class="guilabel">Rotation</span>: Turn the effect.
  97.     </p>
  98.         <p>
  99.       <span class="guilabel">Hue Rotation</span>: Change the tint (color) of the effect.
  100.     </p>
  101.         <p>
  102.       <span class="guilabel">Vector Angle</span>: Turn the Second flares.
  103.     </p>
  104.         <p>
  105.       <span class="guilabel">Vector length</span>: Vary the distance applied for the Second flares.
  106.     </p>
  107.         <p>
  108.       <span class="guilabel">Adaptive Supesampling</span>: Settings of the antialiasing following parametres
  109.       like Depth and Threshold.
  110.     </p>
  111.       </div>
  112.       <div class="simplesect" lang="en" xml:lang="en">
  113.         <div class="titlepage">
  114.           <div>
  115.             <div>
  116.               <h4 class="title"><a id="id3481470"></a>Selector</h4>
  117.             </div>
  118.           </div>
  119.         </div>
  120.         <p>
  121.       The Selector tab allows you to select a Gflare pattern, to change it and save it.
  122.     </p>
  123.         <div class="variablelist">
  124.           <dl>
  125.             <dt>
  126.               <span class="term">New</span>
  127.             </dt>
  128.             <dd>
  129.               <p>
  130.           When you click on this button, you open the selected Gflare pattern and you can use it 
  131.           to create a new one with a new name.
  132.         </p>
  133.             </dd>
  134.             <dt>
  135.               <span class="term">Edit</span>
  136.             </dt>
  137.             <dd>
  138.               <p>
  139.           This button brings up the Gflare Editor (see below).
  140.         </p>
  141.             </dd>
  142.             <dt>
  143.               <span class="term">Copy</span>
  144.             </dt>
  145.             <dd>
  146.               <p>
  147.           This button allows you to save the modified Glare pattern, renaming it.
  148.         </p>
  149.             </dd>
  150.             <dt>
  151.               <span class="term">Delete</span>
  152.             </dt>
  153.             <dd>
  154.               <p>
  155.           This button deletes the selected Gflare pattern.
  156.         </p>
  157.             </dd>
  158.           </dl>
  159.         </div>
  160.       </div>
  161.       <div class="simplesect" lang="en" xml:lang="en">
  162.         <div class="titlepage">
  163.           <div>
  164.             <div>
  165.               <h4 class="title"><a id="id3481544"></a>Gflare Editor</h4>
  166.             </div>
  167.           </div>
  168.         </div>
  169.         <div class="mediaobject">
  170.           <img src="../images/filters/filters-light-gflare-editor.png" />
  171.         </div>
  172.         <div class="variablelist">
  173.           <dl>
  174.             <dt>
  175.               <span class="term">General</span>
  176.             </dt>
  177.             <dd>
  178.               <p><b>Glow Paint Options.┬á</b>
  179.               </p>
  180.               <div class="orderedlist">
  181.                 <ol type="1">
  182.                   <li>
  183.                     <p>
  184.                     <span class="guilabel">Opacity</span>: Slider and input box give more opacity 
  185.                     to glow (0-100).
  186.                   </p>
  187.                   </li>
  188.                   <li>
  189.                     <p>
  190.                     <span class="guilabel">Paint Mode</span>: You can choose between four modes:
  191.                   </p>
  192.                     <div class="itemizedlist">
  193.                       <ul type="disc">
  194.                         <li>
  195.                           <p>
  196.                         <span class="emphasis"><em>Normal</em></span>: In this mode, the glow covers 
  197.                         the image without taking 
  198.                         into account what is beneath.
  199.                       </p>
  200.                         </li>
  201.                         <li>
  202.                           <p>
  203.                         <span class="emphasis"><em>Addition</em></span>: Pixel RGB values of glow are 
  204.                         added to RGB values of the corresponding pixels in the image. 
  205.                         Colors get lighter and white areas may appear.
  206.                       </p>
  207.                         </li>
  208.                         <li>
  209.                           <p>
  210.                         <span class="emphasis"><em>Overlay</em></span>: Light/Dark areas of glow enhance 
  211.                         corresponding light/dark areas of image.
  212.                       </p>
  213.                         </li>
  214.                         <li>
  215.                           <p>
  216.                         <span class="emphasis"><em>Screen</em></span>: Dark areas of image are enlightened 
  217.                         by corresponding light areas of glow. Imagin two slides projected 
  218.                         onto the same screen.
  219.                       </p>
  220.                         </li>
  221.                       </ul>
  222.                     </div>
  223.                   </li>
  224.                 </ol>
  225.               </div>
  226.               <p>
  227.             </p>
  228.               <p><b>Rays Paint Options.┬á</b>
  229.               Options are the same as for "Glow".
  230.             </p>
  231.               <p><b>Second Flare Paint Options.┬á</b>
  232.               Options are the same as for "Glow". 
  233.             </p>
  234.             </dd>
  235.             <dt>
  236.               <span class="term">Glow</span>
  237.             </dt>
  238.             <dd>
  239.               <p><b>Gradients.┬á</b>
  240.               </p>
  241.               <div class="orderedlist">
  242.                 <ol type="1">
  243.                   <li>
  244.                     <p>
  245.                     By clicking on the rectangular buttons, you can develop a long list 
  246.                     of gradients. "%" gradients belong to the Editor.
  247.                   </p>
  248.                   </li>
  249.                   <li>
  250.                     <p>
  251.                     <span class="guilabel">Radial gradient</span>: The selected gradient is drawn radially, 
  252.                     from center to edge.
  253.                   </p>
  254.                   </li>
  255.                   <li>
  256.                     <p>
  257.                     <span class="guilabel">Angular gradient</span>: The selected gradient develops around 
  258.                     center, counter-clockwise, starting from three o'clock if "Rotation" parameter 
  259.                     is set to 0. Radial and angular gradients are combined according to the 
  260.                     Multiply mode: light areas are enhanced and colors are mixed according to CMYK 
  261.                     color system (that of your printer).
  262.                   </p>
  263.                   </li>
  264.                   <li>
  265.                     <p>
  266.                     <span class="guilabel">Angular size gradient</span>: This is a gradient of radius 
  267.                     size which develops angularly. Radius is controled according to gradient 
  268.                     Luminosity: if luminosity is zero (black), the radius is 0%. If luminosity 
  269.                     is 100% (white), the radius is also 100%.
  270.                   </p>
  271.                   </li>
  272.                 </ol>
  273.               </div>
  274.               <p> 
  275.             </p>
  276.               <p><b>Parameters.┬á</b>
  277.               </p>
  278.               <div class="orderedlist">
  279.                 <ol type="1">
  280.                   <li>
  281.                     <p>
  282.                     <span class="guilabel">Size (%)</span>: Sets size (%) of glow (0-200).
  283.                   </p>
  284.                   </li>
  285.                   <li>
  286.                     <p>
  287.                     <span class="guilabel">Rotation</span>: Sets the origin of the angular 
  288.                     gradient (-180 +180).
  289.                   </p>
  290.                   </li>
  291.                   <li>
  292.                     <p>
  293.                     <span class="guilabel">Hue rotation</span>: Sets glow color, according to the HSV color 
  294.                     circle (-180 +180).
  295.                   </p>
  296.                   </li>
  297.                 </ol>
  298.               </div>
  299.               <p>
  300.             </p>
  301.             </dd>
  302.             <dt>
  303.               <span class="term">Rays</span>
  304.             </dt>
  305.             <dd>
  306.               <p><b>Gradients.┬á</b>
  307.               </p>
  308.               <div class="orderedlist">
  309.                 <ol type="1">
  310.                   <li>
  311.                     <p>
  312.                     The options are the same as for Glow.
  313.                   </p>
  314.                   </li>
  315.                 </ol>
  316.               </div>
  317.               <p>
  318.             </p>
  319.               <p><b>Parameters.┬á</b>
  320.               </p>
  321.               <div class="orderedlist">
  322.                 <ol type="1">
  323.                   <li>
  324.                     <p>
  325.                     The first three options are the same as in Glow. Two are new:
  326.                   </p>
  327.                   </li>
  328.                   <li>
  329.                     <p>
  330.                     <span class="guilabel"># of spikes</span>:This option determines the 
  331.                     number of spikes (1-300)
  332.                     but also their texture.  
  333.                   </p>
  334.                   </li>
  335.                   <li>
  336.                     <p>
  337.                     <span class="guilabel">Spike Thickness</span>: When spikes get wider (1-100), 
  338.                     they look like flower petals
  339.                   </p>
  340.                   </li>
  341.                 </ol>
  342.               </div>
  343.               <p>
  344.             </p>
  345.             </dd>
  346.             <dt>
  347.               <span class="term">Second Flares</span>
  348.             </dt>
  349.             <dd>
  350.               <p><b>Gradients.┬á</b>
  351.               The options are the same as for Glow.
  352.             </p>
  353.               <p><b>Parameters.┬á</b>
  354.               Options are the same as in Glow.
  355.             </p>
  356.               <p><b>Shape of Second Flares.┬á</b>
  357.               Second flares, these satellites of the main flare, may have two shapes: 
  358.               <span class="emphasis"><em>Circle</em></span> and <span class="emphasis"><em>Polygon</em></span>. You can set the 
  359.               <span class="emphasis"><em>Number</em></span> polygon sides. The option accepts 1 side (!), not 2.
  360.             </p>
  361.               <p><b>Random seed and Randomize.┬á</b>
  362.               </p>
  363.               <div class="orderedlist">
  364.                 <ol type="1">
  365.                   <li>
  366.                     <p>
  367.                     <span class="guilabel">Random Seed</span>: The random generator will use 
  368.                     this value as a seed to generate random numbers. You can use the same 
  369.                     value to repeat the same "random" sequence several times.
  370.                   </p>
  371.                   </li>
  372.                   <li>
  373.                     <p>
  374.                     <span class="guilabel">Randomize</span>: When you click on this button, you 
  375.                     produce a random seed that will be used by the random generator. 
  376.                     It is each time different.
  377.                   </p>
  378.                   </li>
  379.                 </ol>
  380.               </div>
  381.               <p>
  382.             </p>
  383.             </dd>
  384.           </dl>
  385.         </div>
  386.       </div>
  387.     </div>
  388.     <div class="navfooter">
  389.       <hr />
  390.       <table width="100%" summary="Navigation footer">
  391.         <tr>
  392.           <td width="40%" align="left"><a accesskey="p" href="ch06s09s02.html">Prev</a>┬á</td>
  393.           <td width="20%" align="center">
  394.             <a accesskey="u" href="ch06s09.html">Up</a>
  395.           </td>
  396.           <td width="40%" align="right">┬á<a accesskey="n" href="ch06s09s04.html">Next</a></td>
  397.         </tr>
  398.         <tr>
  399.           <td width="40%" align="left" valign="top">9.2.┬áFlareFX┬á</td>
  400.           <td width="20%" align="center">
  401.             <a accesskey="h" href="index.html">Home</a>
  402.           </td>
  403.           <td width="40%" align="right" valign="top">┬á9.4.┬áLighting Effects</td>
  404.         </tr>
  405.       </table>
  406.     </div>
  407.   </body>
  408. </html>
  409.