Color Bessel 38.1.mp4

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Uploaded by on Aug 7, 2011

Made in 1985... 1986? on my Apple //e.
Multiple exposure, color filters and stop motion.
My last reel before Real Life intruded?
See my flickr page. Same user name. The Asteroid set.

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Film & Animation

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  • @zh84 Over 25 years ago but to the best of my recollection for the Bessel figure each frame took

    about 60 seconds to calculate (300,000 floating point calculations) and about 60 seconds to photograph.

    A positionable color wheel placed Red, Green and Blue filters over the camera lens then the

    corresponding image was displayed. Switching display modes from graphics mode to an empty text mode

    acted as a second shutter.

    Yes, the numbers at the bottom are the constants that describe the figure.

  • Very interesting! I don't know the specifications of an Apple IIe, but if that was rendered in real time instead of frame-by-frame it's a tremendous piece of processing. Hidden line removal and all. Wow.

    What do the numbers at the bottom signify? Some parameter fed to the Bessel function/s?

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