ADOBE AFTER EFFECTS: Forum Expressions Tutorials Podcasts Creative Cloud

parent to null but update position date

COW Forums : Adobe After Effects

<< PREVIOUS   •   FAQ   •   VIEW ALL   •   PRINT   •   NEXT >>
Justin Youngparent to null but update position date
by on Feb 18, 2012 at 5:54:34 am

I have a layer that's parented to a null. It used to be (or least I think it did) that when you parented a layer to a null and moved the null, the position values of the child changed as well.

How do I set things so that if I use a beam effect I can make it line up with the position of my child layer and still have my child layer parented to a null that's moving around everything?

Return to posts index

Roland R. KahlenbergRe: parent to null but update position date
by on Feb 18, 2012 at 9:05:37 am

You'll need to look at Expressions, specifically, Layer Transformations. You will require 2 Null Layers, a child layer and a fourth layer to contain the Beam effect.

Create the parent/child relationship between one of the Nulls (Parent) and the ChildLayer. Then apply Beam to a Solid and set Length to 100%.

Then apply the following Expressions to the Solid with the Beam effect.

NOTE: I've named the Child Layer as, ChildLayer - make the necessary name change to the script to suit your naming convention.

Expression for Beam's Start Point:
thisComp.layer("Null 1").transform.position

Expression for Beam's End Point:


Intensive AE & Mocha Training in Singapore and Malaysia
Adobe ACE/ACI (version 7) & Imagineer Systems Inc Approved Mocha Trainer

Return to posts index

<< PREVIOUS   •   VIEW ALL   •   PRINT   •   NEXT >>
© 2016 All Rights Reserved