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Stretchy/Bouncy Connection?
I’m looking for a method to link two layers together. I have a head and a thought bubble layer. I want the thought bubble to follow the head, but to lag behind in time, sort of like it is attached by an invisible stretchy wire. This is easy enough if you keyframe it, but I want to automate it so I only have to animate the head layer. Any suggestions?
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Matt Hall
Hallway Media, LLC
http://www.hallway-media.com -
4 Replies
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Use an expression with valueAtTime().
head=thisComp.layer(“Head”);
delay=0.1; // delay in seconds
offset_X=100; //offset from head in pixels
offset_Y=100;X=head.position.valueAtTime(time-delay)[0]+offset_X;
Y=head.position.valueAtTime(time-delay)[1]+offset_Y;[X,Y]
Mylenium
[Pour Myl
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Thanks! Exactly what I needed. I had accomplished this before using a much more complicated precomping/time strecthing method, and this is so much cleaner.
Now to push my luck…
Is there a way to add on to this expression to give the child layer some bounciness? So when it stops it wobbles a bit instead of coming to total stop?many thanks,
matt……………………..
Matt Hall
Hallway Media, LLC
http://www.hallway-media.com -
Assuming you are only halting once, I’d hand-keyframe it. You can use this modified expression – it will respect all hand animation and still follow your head.
head=thisComp.layer(“Head”);
delay=0.1; // delay in seconds
offset_X=100; //offset from head in pixels
offset_Y=100;X=position[0]+head.position.valueAtTime(time-delay)[0]+offset_X;
Y=position[1]+head.position.valueAtTime(time-delay)[1]+offset_Y;[X,Y]
Mylenium
[Pour Myl
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