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Re: Best way to produce smooth random motion

On Jun 13, 2005, at 1:56 PM, Dave Hayden wrote:

The easiest way I've found to generate random numbers for seeding an animation is with the _javascript_ patch:

    if ( outputs[0] == null )
        outputs[0] = Math.random();

This works in QC, but doesn't when the qtz is running as a screen saver: _javascript_ in a screen saver always returns the same sequence every time. I've tried to get around this by patching System Time into _javascript_ for a seed value, but there's another difference in the screen saver environment here: it works in QC, but it looks like any number derived from System Time always comes up as NaN in _javascript_.

Anyone seen this before? Does someone have another method for generating random initial values for screen savers?

Here's the latest saver I've thrown together, for your enjoyment:

    http://www.panic.com/~dave/Lissajous.qtz

Thanks,
-Dave

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References: 
 >Best way to produce smooth random motion (From: pete boardman <email@hidden>)
 >Re: Best way to produce smooth random motion (From: Pierre-Olivier Latour <email@hidden>)
 >Re: Best way to produce smooth random motion (From: Dave Hayden <email@hidden>)
 >Re: Best way to produce smooth random motion (From: David Coffin <email@hidden>)
 >Re: Best way to produce smooth random motion (From: Dave Hayden <email@hidden>)



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