This should be entirely possible with a simple additive feedback system,
input mixer channel a output to billboard and mixer channel b
QCAdditiveFeedback.qtz
Description: application/quartzcomposer
experimenting with frame differencing, etc, to detect motion could be useful as well, hth in some way.
On Nov 29, 2007, at 5:33 PM, Jack Hayward wrote:
On Nov 29, 2007, at Nov 29, 2007 | 1:15 PM, Alexandre Van de Sande wrote:do you have a picture of a ball moving on the screen with qc or do youhave a movie of a moving ball?The former... although I'd like it if this would work with any image.What I really want, from an algorithmic standpoint, is to be able to take any source image, delay it, filter it, and recombine it with the existing image. I figure that if I can reduce the alpha in the filter section, then I could control the lifetime of the trails.In the example of the ball, I might have a sprite generating the image of the ball, and LFOs modulating the X and Y coordinates so that it moves around on the screen.Thanks J _______________________________________________ Do not post admin requests to the list. They will be ignored.Quartzcomposer-dev mailing list ([email protected] )Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/quartzcomposer-dev/doktorp%40mac.com This email sent to [EMAIL PROTECTED]
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