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Boomerang effect

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sumeet khuranaBoomerang effect
by on Jan 17, 2011 at 7:52:28 pm

Hi, I am currently working on After Effects CS3. While animating one of my graphics( psd file) in AE , I get this popular boomerang effect trouble.
My problem is that on frame 1, I keyed my graphic with following values :
187.0, -294.0, 1151.0
On frame 2, I keyed the graphic with following values:
187.0, -294.0, 991.0

Only 'Z' position has been assigned different values in both frames.

On 'X' position the value is 187.0 on both frames. But in between both these frames 'X' value keeps on changing ( which I don't want to have).

I can't use "Toggle hold keyframe" , because if do this on frame 1, then along with 'X' position 'Z' position would also get hold.

What should I do if I want to hold only 'X' position on frame 1 and not 'Z' position along with it.

Any help would be appreciated.

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Dave LaRondeRe: Boomerang effect
by on Jan 17, 2011 at 7:58:54 pm

You can make an additional keyframe if you want: place the new keyframe at the point where you want motion to resume. Use Toggle Hold Keyframe on the one where the motion should stop. The Boomerang effect should disappear.

Or you could also simply adjust the Bezier Path Handles on your current keyframes to get rid of the unwanted motion.

Dave LaRonde
Sr. Promotion Producer
KCRG-TV (ABC) Cedar Rapids, IA

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Jason MettlerRe: Boomerang effect
by on Jan 18, 2011 at 5:28:05 am

Try right clicking on the trouble keyframes and select "Keyframe Interpolation".
Change "Temporal" and "Spatial" Interpolation to "Linear".

If you have rogue movement that can correct it.

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sumeet khuranaRe: Boomerang effect
by on Jan 22, 2011 at 5:41:08 pm

Thank you Jason Mettler and Dave LaRonde.I changed "Temporal" and "Spatial" Interpolation to "Linear" and got rid of my problem.
Thanks a lot.

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