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Old 05 August 2012, 22:35   #4
pmc
rebooting...
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Join Date: Apr 2007
Location: Elsewhere
Posts: 1,595
Never made one but I know roughly how it's done:

Push random pixels into the centre of the display (watch the effect and look closely at the centre of the screen, you'll see it)

Blitter copy the bitmap data around and out from the centre to the edges.

The random pixels coupled with the way the blitter copies are done gives the "fractal" looking spirals.
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