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Re: Programmatically control rotation of a Cube

Subject: Re: Programmatically control rotation of a Cube
From: Benjamin Dunton <email@hidden>
Date: Tue, 25 Oct 2005 15:57:29 -0400
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I have the interpolation patch/custom timebase/stop watch working correctly; however, the starting and stopping of the rotation is not reliable because determining wether or not the output of the interpolation is equal to my stop rotation is difficult to grab. I have added a 1 degree tolerance; nonetheless this is not consistent either.

Any ideas on how to get precise control over when to start/stop the rotation based on the current/stop angles?

Thanks,

Ben

On Oct 25, 2005, at 10:32 AM, Pierre-Olivier Latour wrote:

Another idea I had was to set the "Repeat Mode" of the interpolation
patch to "None"; however, it seems once the interpolation's value
equals the stop value, you can't "restart" the interpolation, e.g.
going from start/stop values of 90/180 to 180/270, and the rotation
starting again.

Using an interpolation patch should be the best solution combined with a custom timebase: http://developer.apple.com/qa/qa2005/qa1427.html

Then you use a Stop Watch to drive the timebase


________________________________________________________
Pierre-Olivier Latour                            email@hidden
Quartz Composer Architect                Graphics & Imaging Team


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References:
	>Programmatically control rotation of a Cube (From: Ben Dunton <email@hidden>)
	>Re: Programmatically control rotation of a Cube (From: Pierre-Olivier Latour <email@hidden>)

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