Tie a Yellow Expression ’round an old KeyFrame…”

[Captain Mench]

AARGH!!!

Sorry AGAIN!! — found it… was on my stickies (that I never use!!)

Here it is if anyone wants it… thanks go out to Dan Ebberts at http://www.motionscript.com!!

t = time – key(2).time;
if (t<0){
value;
}else{
veloc = 18;
amplitude = 30;
decay = 4.0;
x = amplitude*Math.cos(veloc*t)/Math.exp(decay*t);
value + [x,0];
}

Done.

Thanks - and sorry for the lame post.

CaptM

[Captain Mench]

Well — it’s still not right… any thoughts as to how I messed it up?

I’m trying to shake the Y Rotation of a camera at a given keyframe. I’ve done this before, but it was a long time ago.

Thanks

CaptM

[Mike Clasby]

It works for me on Y rotation of the camera if you set 2 keyframes and then change that last line to:

value + [x];

or you get the “must be of 1 deminsion, not 2” error. So the whole expression is:

t = time – key(2).time;
if (t<0){
value;
}else{
veloc = 18;
amplitude = 30;
decay = 4.0;
x = amplitude*Math.cos(veloc*t)/Math.exp(decay*t);
value + [x];
}

I didn't know this one, thanks for bringing it up.

[Captain Mench]

Hey thanks for the fix!!

It worked on the ORIENTATION parameters, but I couldn’t figure out how to get it right on the rotational only.

thanks!

Changing my stickie for my shakie!

Thanks

CaptM