Expression to change mask path positions

[Eric Goldstein]

Hi, I tried this:

The manual says that expressions can’t be used directly to affect a mask path, but that mask path can be linked to other properties to affect it. So, I made a layer called Mask Repo 1 and pickwhipped the mask path of mask 1 to the position property of layer: Mask Repo 1. I was hoping then “to change the position on Mask Repo 1 to globally reposition the keyframes of Mask Path 1. But, I get an error message, which says: AE warning: “Object of type 1024 found wheer a Property is needed.”

This is the expression produced by pickwhipping the position property of Mask Repo 1: “thisComp.layer(“Mask Repo 1″).transform.position[0]”

Any thoughts?

Thanks,

Eric

thisComp.layer("Mask Repo 1").transform.position[0]

Eric Goldstein
Giraffe Film Company
Los Angeles
eric@giraffefilm.com

[Xinlai Ni]

I think you can only pickwhipping maskPath property to the same type, not a position type which is a vector of dim 2 or 3.
And by my understanding of AE’s manual, you can’t access any internal properties of maskPath numerically but you can
– pickwhipping to other maskPath, or
– copy your maskPath to a some position property to create a motion path

[Dan Ebberts]

You can link a mask path to another mask path. That’s pretty much it.

Dan