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parent to null but update position date

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Justin Young
parent to null but update position date
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?

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Roland R. Kahlenberg
Re: parent to null but update position date
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:


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