Possible expression to move Z axis on one layer when Y axis moves on another layer?

[Dan Ebberts]

There are a couple of ways to interpret what you’re asking for. The most common requires a reference–either a hard-coded value for y, or, as in this example, where the layer was at time zero.

p = thisComp.layer(“other layer”).transform.position;
y = p.value[1] – p.valueAtTime(0)[1];
value + [0,0,y]

Note that nothing will happen until you animate the y-motion layer, then the layer with the expression should match the movement in z.

Dan

[Matthew Ruiz]

I think I am doing something wrong but not sure where the layer “front control” is my Y axis layer I am putting the expression on the Z axis layer “bottom control” I plug in the expression below in the Z axis layer but the “bottom control” (aka Z axis layer) does not move with it am I missing a bit of information into the expression?

Thanks,

Matt

p = thisComp.layer("Front controls").transform.position
y = thisComp.layer("Front controls").transform.position[1] - p.valueAtTime(0)[1];
value + [0,0,y]


[Dan Ebberts]

You have to animate “front control” (with keyframes or an expression), or nothing will happen.

Dan

[Matthew Ruiz]

I’m sorry I completely asked the wrong question, (long day) your expression worked flawlessly thank you. I meant to ask if I wanted to do the same exact effect except I want the Z axis to go opposite direction how would I do that in the expressions if possible?

Thanks,

Matt

[Dan Ebberts]

Just change the last line to:

value – [0,0,y]

Dan

[Matthew Ruiz]

Kudos sir, Dan! Much appreciated!