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- <title>7.2.  Gradient Flare</title>
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- <tr>
- <th colspan="3" align="center">7.2. 
- <span lang="en" xml:lang="en">Gradient Flare</span>
- </th>
- </tr>
- <tr>
- <td width="20%" align="left"><a accesskey="p" href="filters-light-and-shadow.html"><img src="../images/prev.png" alt="Prev" /></a> </td>
- <th width="60%" align="center">7. 
- <span lang="en" xml:lang="en">Light and Shadow Filters</span>
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- <div class="sect2" lang="en" xml:lang="en">
- <div class="titlepage">
- <div>
- <div>
- <h3 class="title"><a id="plug-in-gflare"></a>7.2. 
- <span lang="en" xml:lang="en">Gradient Flare</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: 2442 $</td>
- <td align="left">2007-09-05</td>
- <td align="left">ude</td>
- </tr>
- </table>
- </div>
- </div>
- </div>
- </div>
- <a id="id2741651" class="indexterm"></a>
- <a id="id2741669" class="indexterm"></a>
- <div class="sect3" lang="en" xml:lang="en">
- <div class="titlepage">
- <div>
- <div>
- <h4 class="title"><a id="id2741678"></a>7.2.1. 
- <span lang="en" xml:lang="en">Overview</span>
- </h4>
- </div>
- </div>
- </div>
- <div class="figure">
- <a id="id2741689"></a>
- <p class="title">
- <b>Figure 16.66. 
- <span lang="en" xml:lang="en">Example for the Gradient Flare filter</span>
- </b>
- </p>
- <div class="figure-contents">
- <div class="mediaobject">
- <img src="../images/filters/examples/taj_orig.jpg" alt="Example for the Gradient Flare filter" />
- <div class="caption">
- <p>Original image</p>
- </div>
- </div>
- <div class="mediaobject">
- <img src="../images/filters/examples/light-taj-gflare.jpg" alt="Example for the Gradient Flare filter" />
- <div class="caption">
- <p>Filter “<span class="quote">Gradient Flare</span>” applied</p>
- </div>
- </div>
- </div>
- </div>
- <br class="figure-break" />
- <p>
- Gradient Flare effect reminds the effect you get when you take a
- photograph of a blinding light source, with a halo and radiations around
- the source. The Gradient Flare image has three components:
- <span class="emphasis"><em>Glow</em></span> which is the big central fireball,
- <span class="emphasis"><em>Rays</em></span> and <span class="emphasis"><em>Second Flares</em></span>
- </p>
- </div>
- <div class="sect3" lang="en" xml:lang="en">
- <div class="titlepage">
- <div>
- <div>
- <h4 class="title"><a id="id2741778"></a>7.2.2. 
- <span lang="en" xml:lang="en">Activate the filter</span>
- </h4>
- </div>
- </div>
- </div>
- <p>
- This filter is found in the image window menu under
- <span class="guimenu">Filte<span class="accel">r</span>s</span> ‚Üí <span class="guisubmenu"><span class="accel">L</span>ight and Shadow</span> ‚Üí <span class="guimenuitem"><span class="accel">G</span>radient Flare</span>
- </p>
- </div>
- <div class="sect3" lang="en" xml:lang="en">
- <div class="titlepage">
- <div>
- <div>
- <h4 class="title"><a id="id2741829"></a>7.2.3. 
- <span lang="en" xml:lang="en">Options</span>
- </h4>
- </div>
- </div>
- </div>
- <p>
- The Settings tab allows you to set manually the parameters while the
- Selector tab let you choose presets in a list.
- </p>
- <div class="variablelist">
- <dl>
- <dt>
- <span class="term">Preview</span>
- </dt>
- <dd>
- <p>
- When <span class="guilabel">Auto Update Preview</span> is checked,
- parameter setting results are interactively displayed in preview
- without modifying the image until you click on
- <span class="guilabel">OK</span> button.
- </p>
- </dd>
- </dl>
- </div>
- </div>
- <div class="sect3" lang="en" xml:lang="en">
- <div class="titlepage">
- <div>
- <div>
- <h4 class="title"><a id="id2741884"></a>7.2.4. 
- <span lang="en" xml:lang="en">Settings</span>
- </h4>
- </div>
- </div>
- </div>
- <div class="figure">
- <a id="id2741895"></a>
- <p class="title">
- <b>Figure 16.67. 
- <span lang="en" xml:lang="en">
- “<span class="quote">Gradient Flare</span>” filter options (Settings)
- </span>
- </b>
- </p>
- <div class="figure-contents">
- <div class="mediaobject">
- <img src="../images/filters/gflare-options-1.png" alt="Gradient Flare filter options (Settings)" />
- </div>
- </div>
- </div>
- <br class="figure-break" />
- <div class="variablelist">
- <dl>
- <dt>
- <span class="term">Center</span>
- </dt>
- <dd>
- <p>
- You can set there X and Y (pixels) coordinates of glint. The
- coordinate origin is at the upper left corner
- </p>
- </dd>
- <dt>
- <span class="term">Parameters</span>
- </dt>
- <dd>
- <div class="itemizedlist">
- <ul type="disc">
- <li>
- <p>
- <span class="guilabel">Radius</span>: The radius of the effect. Don't
- be afraid to use the box with the digits instead the slider
- which is a bit limited.
- </p>
- </li>
- <li>
- <p>
- <span class="guilabel">Rotation</span>: Turn the effect.
- </p>
- </li>
- <li>
- <p>
- <span class="guilabel">Hue Rotation</span>: Change the tint (color) of
- the effect.
- </p>
- </li>
- <li>
- <p>
- <span class="guilabel">Vector Angle</span>: Turn the Second flares.
- </p>
- </li>
- <li>
- <p>
- <span class="guilabel">Vector length</span>: Vary the distance applied
- for the Second flares.
- </p>
- </li>
- </ul>
- </div>
- </dd>
- <dt>
- <span class="term">Adaptive Supersampling</span>
- </dt>
- <dd>
- <p>
- Settings of the anti-aliasing following parameters like Depth
- and Threshold.
- </p>
- </dd>
- </dl>
- </div>
- </div>
- <div class="sect3" lang="en" xml:lang="en">
- <div class="titlepage">
- <div>
- <div>
- <h4 class="title"><a id="id2742066"></a>7.2.5. 
- <span lang="en" xml:lang="en">Selector</span>
- </h4>
- </div>
- </div>
- </div>
- <div class="figure">
- <a id="id2742077"></a>
- <p class="title">
- <b>Figure 16.68. 
- <span lang="en" xml:lang="en">
- “<span class="quote">Gradient Flare</span>” filter options (Selector)
- </span>
- </b>
- </p>
- <div class="figure-contents">
- <div class="mediaobject">
- <img src="../images/filters/gflare-options-2.png" alt="Gradient Flare filter options (Selector)" />
- </div>
- </div>
- </div>
- <br class="figure-break" />
- <p>
- The Selector tab allows you to select a Gradient Flare pattern, to
- change it and save it.
- </p>
- <div class="variablelist">
- <dl>
- <dt>
- <span class="term">New</span>
- </dt>
- <dd>
- <p>
- When you click on this button, you create a new Gradient Flare
- pattern. Give it a name of your choice.
- </p>
- </dd>
- <dt>
- <span class="term">Edit</span>
- </dt>
- <dd>
- <p>
- This button brings up the Gradient Flare Editor (see below).
- </p>
- </dd>
- <dt>
- <span class="term">Copy</span>
- </dt>
- <dd>
- <p>
- This button allows you to duplicate selected Gradient Flare
- pattern. You can edit the copy without altering the original.
- </p>
- </dd>
- <dt>
- <span class="term">Delete</span>
- </dt>
- <dd>
- <p>
- This button deletes the selected Gradient Flare pattern.
- </p>
- </dd>
- </dl>
- </div>
- </div>
- <div class="sect3" lang="en" xml:lang="en">
- <div class="titlepage">
- <div>
- <div>
- <h4 class="title"><a id="id2742200"></a>7.2.6. 
- <span lang="en" xml:lang="en">Gradient Flare Editor</span>
- </h4>
- </div>
- </div>
- </div>
- <div class="variablelist">
- <dl>
- <dt>
- <span class="term">General</span>
- </dt>
- <dd>
- <div class="figure">
- <a id="id2742223"></a>
- <p class="title">
- <b>Figure 16.69. 
- <span lang="en" xml:lang="en">
- “<span class="quote">Gradient Flare Editor</span>” options (General)
- </span>
- </b>
- </p>
- <div class="figure-contents">
- <div class="mediaobject">
- <img src="../images/filters/gflare-editor-1.png" alt="Gradient Flare Editor options (General)" />
- </div>
- </div>
- </div>
- <br class="figure-break" />
- <div class="variablelist">
- <dl>
- <dt>
- <span class="term">Glow Paint Options</span>
- </dt>
- <dd>
- <div class="itemizedlist">
- <ul type="disc">
- <li>
- <p>
- <span class="guilabel">Opacity</span>: Slider and input box
- allows you to reduce glow opacity (0-100).
- </p>
- </li>
- <li>
- <p>
- <span class="guilabel">Paint Mode</span>: You can choose between
- four modes:
- </p>
- <div class="itemizedlist">
- <ul type="circle">
- <li>
- <p>
- <span class="emphasis"><em>Normal</em></span>: In this mode, the glow
- covers the image without taking into account what is
- beneath.
- </p>
- </li>
- <li>
- <p>
- <span class="emphasis"><em>Addition</em></span>: Pixel RGB values of
- glow are added to RGB values of the corresponding
- pixels in the image. Colors get lighter and white
- areas may appear.
- </p>
- </li>
- <li>
- <p>
- <span class="emphasis"><em>Overlay</em></span>: Light/Dark areas of
- glow enhance corresponding light/dark areas of
- image.
- </p>
- </li>
- <li>
- <p>
- <span class="emphasis"><em>Screen</em></span>: Dark areas of image are
- enlightened by corresponding light areas of glow.
- Imagine two slides projected onto the same screen.
- </p>
- </li>
- </ul>
- </div>
- </li>
- </ul>
- </div>
- </dd>
- <dt>
- <span class="term">Rays Paint Options</span>
- </dt>
- <dd>
- <p>
- Options are the same as for "Glow".
- </p>
- </dd>
- <dt>
- <span class="term">Second Flare Paint Options</span>
- </dt>
- <dd>
- <p>
- Options are the same as for "Glow".
- </p>
- </dd>
- </dl>
- </div>
- </dd>
- <dt>
- <span class="term">Glow</span>
- </dt>
- <dd>
- <div class="figure">
- <a id="id2742422"></a>
- <p class="title">
- <b>Figure 16.70. 
- <span lang="en" xml:lang="en">
- “<span class="quote">Gradient Flare Editor</span>” options (Glow)
- </span>
- </b>
- </p>
- <div class="figure-contents">
- <div class="mediaobject">
- <img src="../images/filters/gflare-editor-2.png" alt="Gradient Flare Editor options (Glow)" />
- </div>
- </div>
- </div>
- <br class="figure-break" />
- <div class="variablelist">
- <dl>
- <dt>
- <span class="term">Gradients</span>
- </dt>
- <dd>
- <p>
- By clicking on the rectangular buttons, you can develop a
- long list of gradients. "%" gradients belong to the Editor.
- </p>
- <div class="itemizedlist">
- <ul type="disc">
- <li>
- <p>
- <span class="guilabel">Radial gradient</span>: The selected
- gradient is drawn radially, from center to edge.
- </p>
- </li>
- <li>
- <p>
- <span class="guilabel">Angular gradient</span>: The selected
- gradient develops around center, counter-clockwise,
- starting from three o'clock if "Rotation" parameter is
- set to 0. Radial and angular gradients are combined
- according to the Multiply mode: light areas are enhanced
- and colors are mixed according to CMYK color system
- (that of your printer).
- </p>
- </li>
- <li>
- <p>
- <span class="guilabel">Angular size gradient</span>: This is a
- gradient of radius size which develops angularly. Radius
- is controlled according to gradient Luminosity: if
- luminosity is zero (black), the radius is 0%. If
- luminosity is 100% (white), the radius is also 100%.
- </p>
- </li>
- </ul>
- </div>
- </dd>
- <dt>
- <span class="term">Parameters</span>
- </dt>
- <dd>
- <div class="itemizedlist">
- <ul type="disc">
- <li>
- <p>
- <span class="guilabel">Size (%)</span>: Sets size (%) of glow
- (0-200).
- </p>
- </li>
- <li>
- <p>
- <span class="guilabel">Rotation</span>: Sets the origin of the
- angular gradient (-180 +180).
- </p>
- </li>
- <li>
- <p>
- <span class="guilabel">Hue rotation</span>: Sets glow color,
- according to the HSV color circle (-180 +180).
- </p>
- </li>
- </ul>
- </div>
- </dd>
- </dl>
- </div>
- </dd>
- <dt>
- <span class="term">Rays</span>
- </dt>
- <dd>
- <div class="figure">
- <a id="id2742616"></a>
- <p class="title">
- <b>Figure 16.71. 
- <span lang="en" xml:lang="en">
- “<span class="quote">Gradient Flare Editor</span>” options (Rays)
- </span>
- </b>
- </p>
- <div class="figure-contents">
- <div class="mediaobject">
- <img src="../images/filters/gflare-editor-3.png" alt="Gradient Flare Editor options (Rays)" />
- </div>
- </div>
- </div>
- <br class="figure-break" />
- <div class="variablelist">
- <dl>
- <dt>
- <span class="term">Gradients</span>
- </dt>
- <dd>
- <p>
- The options are the same as for Glow.
- </p>
- </dd>
- <dt>
- <span class="term">Parameters</span>
- </dt>
- <dd>
- <p>
- The first three options are the same as in Glow. Two are
- new:
- </p>
- <div class="itemizedlist">
- <ul type="disc">
- <li>
- <p>
- <span class="guilabel"># of spikes</span>: This option determines
- the number of spikes (1-300) but also their texture.
- </p>
- </li>
- <li>
- <p>
- <span class="guilabel">Spike Thickness</span>: When spikes get
- wider (1-100), they look like flower petals
- </p>
- </li>
- </ul>
- </div>
- </dd>
- </dl>
- </div>
- </dd>
- <dt>
- <span class="term">Second Flares</span>
- </dt>
- <dd>
- <div class="figure">
- <a id="id2742740"></a>
- <p class="title">
- <b>Figure 16.72. 
- <span lang="en" xml:lang="en">
- “<span class="quote">Gradient Flare Editor</span>” options (Second Flares)
- </span>
- </b>
- </p>
- <div class="figure-contents">
- <div class="mediaobject">
- <img src="../images/filters/gflare-editor-4.png" alt="Gradient Flare Editor options (Second Flares)" />
- </div>
- </div>
- </div>
- <br class="figure-break" />
- <div class="variablelist">
- <dl>
- <dt>
- <span class="term">Gradients</span>
- </dt>
- <dd>
- <p>
- The options are the same as for Glow.
- </p>
- </dd>
- <dt>
- <span class="term">Parameters</span>
- </dt>
- <dd>
- <p>
- Options are the same as in Glow.
- </p>
- </dd>
- <dt>
- <span class="term">Shape of Second Flares</span>
- </dt>
- <dd>
- <p>
- Second flares, these satellites of the main flare, may have
- two shapes: <span class="emphasis"><em>Circle</em></span> and
- <span class="emphasis"><em>Polygon</em></span>. You can set the
- <span class="emphasis"><em>Number</em></span> polygon sides. The option
- accepts 1 side (!), not 2.
- </p>
- </dd>
- <dt>
- <span class="term">Random seed and Randomize</span>
- </dt>
- <dd>
- <div class="itemizedlist">
- <ul type="disc">
- <li>
- <p>
- <span class="guilabel">Random Seed</span>: The random generator
- will use this value as a seed to generate random
- numbers. You can use the same value to repeat the same
- “<span class="quote">random</span>” sequence several times.
- </p>
- </li>
- <li>
- <p>
- <span class="guilabel">Randomize</span>: When you click on this
- button, you produce a random seed that will be used by
- the random generator. It is each time different.
- </p>
- </li>
- </ul>
- </div>
- </dd>
- </dl>
- </div>
- </dd>
- </dl>
- </div>
- </div>
- </div>
- <div class="navfooter">
- <hr />
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- <td width="40%" align="left" valign="top"><a accesskey="p" href="filters-light-and-shadow.html">7. 
- <span lang="en" xml:lang="en">Light and Shadow Filters</span>
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- </a>
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- <td width="40%" align="right" valign="top"> <a accesskey="n" href="plug-in-flarefx.html">7.3. 
- <span lang="en" xml:lang="en">Lens Flare</span>
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