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<h3 class="title"><a id="plug-in-nova"></a>9.6. SuperNova</h3>
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<p>
This filter is found in
<span class="guimenuitem">Image>Filters/Light Effects/Super<span class="accel">N</span>ova</span>.
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<p>
This filter creates a big star reminding a super-nova. It works with RGB and GRAY images. Light
effect decreases according to 1/r where r is the distance from star center.
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<span class="term">Center of SuperNova</span>
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You can use input boxes to set horizontal (X) and vertical (Y) coordinates of SuperNova
center. You can also click and drag the SuperNova center in <span class="emphasis"><em>preview</em></span>.
</p>
<p>
<span class="guilabel">Show Cursor</span>: This option brings up a reticle in preview, centered on
SuperNova.
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<span class="term">More parameters</span>
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<p>
<span class="guilabel">Color</span>: When you click on the color dwell,
you bring up the usual color selector.
</p>
<p>
<span class="guilabel">Radius</span>: This is radius of the SuperNova center (1-100).
When you increase the value, you increase the number of central white pixels
according to r*r (1, 4, 9...).
</p>
<p>
<span class="guilabel">Spokes</span>: This is number of rays (1-1024). Each pixel in
nova center emit
one pixel wide rays. All these rays are more or less superimposed resulting in this
glittering effect you get when you move this slider.
</p>
<p>
<span class="guilabel">Random Hue</span>: Colours rays at random. (0-360) value
seems to be a range in HSV color circle.
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