How to link with relative values?

[Romain Cousin]

I think you can write this expression on the position of your follower layer :

thisComp.layer("NAME OF THE "PARENT" LAYER").transform.position+value;

Freelance motion designer :
http://www.romaincousin.fr

[Dan Ebberts]

Try this:

p = thisComp.layer(‘NAME OF THE “PARENT” LAYER’).transform.position;
(p.value – p.valueAtTime(0)) + value;

Dan

[Romain Cousin]

Nice! I really need to learn how to use valueAtTime…

Freelance motion designer :
http://www.romaincousin.fr

[Mateo Mazzini]

Thanks a lot Dan! that does exactly what I needed.
Is there a way to go further and make this expression work when you link at the middle of an animation?.
I was playing with nearestKey(time) but I didn’t accomplish anything so far.

Matz

[Dan Ebberts]

If you wanted to attach to the parent at a particular keyframe, you could do it like this:


p = thisComp.layer('NAME OF THE "PARENT" LAYER').transform.position;
keyToStart = 2;
if (p.numKeys > (keyToStart-1)){
t = p.key(keyToStart).time;
if (time > t){
value + (p.value - p.valueAtTime(t))
}else{
value
}
}else
value


Or, it you wanted to be at a particular time, you could do this:


p = thisComp.layer('NAME OF THE "PARENT" LAYER').transform.position;
tStart = 2;
if (time > tStart)
value + (p.value - p.valueAtTime(tStart))
else
value


Dan

[Mateo Mazzini]

these two codes are amazing! thanks a lot Dan!

Matz

[Gustavo Saliola]

Hi Dan! As usual, and trough time, thanks for your kind and resourceful answers! In my case, I’m trying to parent paint clone strokes “clone position” and “position” to a null’s position, but maintaining both actual values, so I don’t have to manually adjust the paint work done.

I know in my gut that it can’t be too difficult, but having googled for 2 hrs. and found myself here again, I think there’s hope.

[Dan Ebberts]

I’m having a hard time picturing what it is that you’re asking. Can you provide more detail?