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Linear expression linked to keyframes in another comp
I need to link a linear expression to the 3rd and 4th keyframes of a property on a different comp. the layer where the linear will be applied is nested in the comp that has the layer with the keyframes.
I have successfully done this in the past, but this now it’s not working, returning an error that says that ctrl.valueAtTime is not a function. ctrl is the name of a variable that contains the layer with the keyframes, as you can see below:
c=comp("expertAssist_After");
ctrl=c.layer("NULL CONTROL").transform.position[1];
l=c.layer(thisComp.name);
x=ctrl.valueAtTime(time+l.startTime);
k3=c.layer("NULL CONTROL").transform.position.key(3).value[1];
k4=c.layer("NULL CONTROL").transform.position.key(4).value[1];
linear(x,k3,k4,0,100)This is an old expression and I don’t know if it’s broken because of the javascript engine vs legacy ExtendScript, it does not work on neither.
Any help is greatly appreciated.
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6 Replies
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I haven’t tested it, but try it this way:
c=comp("expertAssist_After");
ctrl=c.layer("NULL CONTROL").transform.position;
l=c.layer(thisComp.name);
x=ctrl.valueAtTime(time+l.startTime)[1];
k3=ctrl.key(3).value[1];
k4=ctrl.key(4).value[1];
linear(x,k3,k4,0,100) -
Hey Dan, thanks for your help.
The expression error went away but it still does not work, it just not showing an error anymore. The value is stuck at 0%.
Thanks,
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It seems to work for me, but I have no idea if my setup is anything like yours…
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I dont have anything out of the ordinary, I’m running 2023.6.0 and I’m using JavaScript for the expressions engine.
If it’s a possibility, I’d be happy (and very grateful) to share a project for you to look at.
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Sure.
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Awesome, thank you so much. I sent it to you a minute ago by email.
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