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

[matteociaociao]

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!

[Mathias Moehl]

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];

[matteociaociao]

thx man

but i tried and i just get errors.

what do you mean by "End1"?

i have just 3 nulls Called A, B, C.

[matteociaociao · Accepted solution]

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 indipendently

thanks 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!!!

[jaydude-wb]

Why don't you use the L that you defined?

L = thisComp.layer("Shape Layer 2");

fullPosition = thisComp.layer("Shape Layer 2").toComp(L.anchorPoint);

Is the 2nd line the same as

fullPosition = L.toComp(L.anchorPoint);