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<?xml version="1.0" encoding="UTF-8" standalone="no"?> <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <html xmlns="http://www.w3.org/1999/xhtml"> <head> <meta http-equiv="Content-Type" content="text/html; charset=UTF-8" /> <title>15.11.  Particle Trace</title> <link rel="stylesheet" href="gimp-help-plain.css" type="text/css" /> <link rel="stylesheet" href="gimp-help-screen.css" type="text/css" /> <link rel="stylesheet" href="gimp-help-custom.css" type="text/css" /> <link rel="alternate stylesheet" href="gimp22.css" type="text/css" title="gimp22" /> <meta name="generator" content="DocBook XSL Stylesheets V1.73.2" /> <link rel="start" href="index.html" title="GNU Image Manipulation Program" /> <link rel="up" href="filters-alpha-to-logo.html" title="15.  Alpha to Logo Filters" /> <link rel="prev" href="script-fu-neon-logo-alpha.html" title="15.10.  Neon" /> <link rel="next" href="script-fu-starburst-logo-alpha.html" title="15.12.  Starburst" /> </head> <body> <div class="navheader"> <table width="100%" summary="Navigation header"> <tr> <th colspan="3" align="center">15.11.  <span lang="en" xml:lang="en">Particle Trace</span> </th> </tr> <tr> <td width="20%" align="left"><a accesskey="p" href="script-fu-neon-logo-alpha.html"><img src="../images/prev.png" alt="Prev" /></a> </td> <th width="60%" align="center">15.  <span lang="en" xml:lang="en">Alpha to Logo Filters</span> </th> <td width="20%" align="right"> <a accesskey="n" href="script-fu-starburst-logo-alpha.html"><img src="../images/next.png" alt="Next" /></a></td> </tr> </table> <hr /> </div> <div class="sect2" lang="en" xml:lang="en"> <div class="titlepage"> <div> <div> <h3 class="title"><a id="script-fu-t-o-p-logo-alpha"></a>15.11.  <span lang="en" xml:lang="en">Particle Trace</span> </h3> </div> <div> <div class="revhistory"> <table border="1" width="100%" summary="Revision history"> <tr> <th align="left" valign="top" colspan="3"> <b>Revision History</b> </th> </tr> <tr> <td align="left">Revision $Revision: 2313 $</td> <td align="left">2007-11-21</td> <td align="left">ude</td> </tr> </table> </div> </div> </div> </div> <a id="id2787756" class="indexterm"></a> <a id="id2787774" class="indexterm"></a> <div class="sect3" lang="en" xml:lang="en"> <div class="titlepage"> <div> <div> <h4 class="title"><a id="id2787783"></a>15.11.1.  <span lang="en" xml:lang="en">Overview</span> </h4> </div> </div> </div> <div class="figure"> <a id="id2787794"></a> <p class="title"> <b>Figure 16.316.  <span lang="en" xml:lang="en"> Examples for the “<span class="quote">Particle Trace</span>” filter </span> </b> </p> <div class="figure-contents"> <div class="mediaobject"> <img src="../images/filters/examples/t-o-p.jpg" alt="Examples for the Particle Trace filter" /> <div class="caption"> <p>“<span class="quote">Particle Trace</span>” applied</p> </div> </div> <div class="mediaobject"> <img src="../images/filters/examples/t-o-p-edge.jpg" alt="Examples for the Particle Trace filter" /> <div class="caption"> <p>Applied with “<span class="quote">Edge only</span>” option</p> </div> </div> </div> </div> <br class="figure-break" /> <p> To get such images, open a new image with a transparent beckground, create selections and fill them with green, apply filter. </p> <p> This filter adds an effect, reminding of particle traces in a bubble chamber of nuclear physics, to the active layer alpha. </p> <div class="warning" style="margin-left: 0.5in; margin-right: 0.5in;"> <table border="0" summary="Warning"> <tr> <td rowspan="2" align="center" valign="top" width="25"> <img alt="[Warning]" src="../images/warning.png" /> </td> <th align="left">Warning</th> </tr> <tr> <td align="left" valign="top"> <p> The image will always be resized to the active layer's size. </p> </td> </tr> </table> </div> <p> The filter is derived from the “<span class="quote">Particle Trace</span>” script (<span class="guimenu"><span class="accel">X</span>tns</span> → <span class="guisubmenu"><span class="accel">L</span>ogo</span> → <span class="guimenuitem"><span class="accel">P</span>article Trace</span> in the toolbox), which creates the following text effect: </p> <div class="mediaobject"> <img src="../images/filters/examples/t-o-p-script-fu.jpg" /> <div class="caption"> <p>The “<span class="quote">Particle Trace</span>” Script-Fu script.</p> </div> </div> <p> The filter adds <a class="link" href="plug-in-rgb-noise.html" title="3.3.  RGB Noise">noise</a> to the alpha and then turns the spots into <a class="link" href="plug-in-sparkle.html" title="7.5.  Sparkle">sparkles</a>. Then it adds a <a class="link" href="gimp-selection-feather.html" title="7.9.  Feather">feathered</a> white shadow. </p> </div> <div class="sect3" lang="en" xml:lang="en"> <div class="titlepage"> <div> <div> <h4 class="title"><a id="id2787986"></a>15.11.2.  <span lang="en" xml:lang="en">Activate the filter</span> </h4> </div> </div> </div> <p> You can find this filter in the image window menu under <span class="guimenu"><span class="accel">F</span>ilters</span> → <span class="guisubmenu">Alpha to <span class="accel">L</span>ogo</span> → <span class="guimenuitem"><span class="accel">P</span>article Trace</span>. </p> </div> <div class="sect3" lang="en" xml:lang="en"> <div class="titlepage"> <div> <div> <h4 class="title"><a id="id2788037"></a>15.11.3.  <span lang="en" xml:lang="en">Options</span> </h4> </div> </div> </div> <div class="figure"> <a id="id2788048"></a> <p class="title"> <b>Figure 16.317.  <span lang="en" xml:lang="en">“<span class="quote">Particle Trace</span>” options</span> </b> </p> <div class="figure-contents"> <div class="mediaobject"> <img src="../images/filters/options-logo-t-o-p.png" alt="Particle Trace options" /> </div> </div> </div> <br class="figure-break" /> <div class="variablelist"> <dl> <dt> <span class="term">Border size (pixels)</span> </dt> <dd> <p> Actually this option is the text layer's border of the “<span class="quote">Particle Trace</span>” Script-Fu Logo (hence the misleading name). Here it determines the width of the white shadow's <a class="link" href="gimp-selection-feather.html" title="7.9.  Feather">feathering</a>. </p> </dd> <dt> <span class="term">Hit rate</span> </dt> <dd> <p> This option sets the amount of light points produced by the <a class="link" href="plug-in-rgb-noise.html" title="3.3.  RGB Noise">Noise</a> filter and thus the amount of points converted to <a class="link" href="plug-in-sparkle.html" title="7.5.  Sparkle">sparkles</a>. The value ranges from from 0.0 to 1.0, but some values may be not useful: </p> <div class="figure"> <a id="id2788147"></a> <p class="title"> <b>Figure 16.318.  <span lang="en" xml:lang="en">“<span class="quote">Hit rate</span>” examples</span> </b> </p> <div class="figure-contents"> <div class="mediaobject"> <img src="../images/filters/examples/t-o-p-hits10.jpg" alt="Hit rate examples" /> <div class="caption"> <p>Hit rate 0.10</p> </div> </div> <div class="mediaobject"> <img src="../images/filters/examples/t-o-p-hits25.jpg" alt="Hit rate examples" /> <div class="caption"> <p>Hit rate 0.25</p> </div> </div> <div class="mediaobject"> <img src="../images/filters/examples/t-o-p-hits40.jpg" alt="Hit rate examples" /> <div class="caption"> <p>Hit rate 0.40</p> </div> </div> </div> </div> <br class="figure-break" /> </dd> <dt> <span class="term">Edge width</span> </dt> <dd> <p> Along the edge of the alpha, a new area will be created with radius “<span class="quote">Edge width</span>” (compare <a class="xref" href="gimp-selection-border.html" title="7.13.  Border">Section 7.13, “ <span lang="en" xml:lang="en">Border</span> ”</a>). This area will also be filled with the “<span class="quote">Base color</span>”, but will be a bit darker. </p> </dd> <dt> <span class="term">Edge only</span> </dt> <dd> <p> If checked, the filter effect will be applied to the edge of the alpha channel only and the area of the alpha channel will be cleared. </p> </dd> <dt> <span class="term">Base color</span> </dt> <dd> <p> This color is used to fill the area defined by the active layer's alpha channel. It defaults to a very dark green. As usual, clicking on the color swatch button opens a color selector where you can choose any other color. </p> </dd> <dt> <span class="term">Background color</span> </dt> <dd> <p> This color is used to fill a new background layer. Note that above the background layer there is a white shadow layer wich has opacity set to 90%, so you will see the background color only partially. If the “<span class="quote">Edge only</span>” option is enabled, the area of the alpha channel will be cleared and you will see the background color. Again, when you click on the color swatch button, a color selector pops up where you can select any color. </p> <div class="mediaobject"> <img src="../images/filters/examples/t-o-p-layers.png" /> <div class="caption"> <p> The active layer (top) and the filter layers below </p> </div> </div> </dd> </dl> </div> </div> </div> <div class="navfooter"> <hr /> <table width="100%" summary="Navigation footer"> <tr> <td width="40%" align="left"><a accesskey="p" href="script-fu-neon-logo-alpha.html"><img src="../images/prev.png" alt="Prev" /></a> </td> <td width="20%" align="center"> <a accesskey="u" href="filters-alpha-to-logo.html"> <img src="../images/up.png" alt="Up" /> </a> </td> <td width="40%" align="right"> <a accesskey="n" href="script-fu-starburst-logo-alpha.html"><img src="../images/next.png" alt="Next" /></a></td> </tr> <tr> <td width="40%" align="left" valign="top"><a accesskey="p" href="script-fu-neon-logo-alpha.html">15.10.  <span lang="en" xml:lang="en">Neon</span> </a> </td> <td width="20%" align="center"> <a accesskey="h" href="index.html"> <img src="../images/home.png" alt="Home" /> </a> </td> <td width="40%" align="right" valign="top"> <a accesskey="n" href="script-fu-starburst-logo-alpha.html">15.12.  <span lang="en" xml:lang="en">Starburst</span> </a></td> </tr> </table> </div> </body> </html> 
