getting true position of parented layer (Just the y pos though!)

Question

i want to link with expression Y position of Layer A to Layer B ( B is Parenter to C).

i tried to rearrange expressions like:

L = thisComp.layer("End1");

L.toWorld(L.anchorPoint);

or

thisComp.layer("childNULL").toComp([0,0,0])

but i cannot make these expressions work just for the y value.

my knowledge of expressions is too limited please help!

matteociaociao · Accepted Answer

L = thisComp.layer("Shape Layer 2");fullPosition = thisComp.layer("Shape Layer 2").toComp(L.anchorPoint);x = [0] + effect("Slider Control")("Slider");y = fullPosition[1];[x,y]i did this and it works, i put a slider there to control x indipendentlythanks a lot mathias great suggestion.coming from c4d with tags, xpresso, and python, i really dont uderstand why ae is not catching up with more intuitive systems....get into expressions is hard!!!

Mathias Moehl · Answer

the position values are arrays. So you can simply append [1] to get the y portion of it like this:

var L = thisComp.layer("End1");

var fullPosition = thisComp.layer("childNULL").toComp(L.anchorPoint);

var YPosition = fullPosition[1];

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