scripting question: how to test layers for their types

[Nicholas White]

Hello,

I’m writing a script to go through a ton of layers, I want to add expressions to different types of layers. The first part of the script goes to layer ‘i’ and tests to see if it is light layer. I want to write something like this:

var activeLayer = selectedComp.layer(i);
if(activeLayer instanceof LightItem;
do something

However, I get the error “LightItem is undefined”

What are the different types of layers that can be found in a composition, and how can they be tested to see if they are one layer type or another?

Take care,

Nick

[Nicholas White]

Hey,

Sort of found a workaround in the scripting manual (please, somebody write a good manual in the next version!) to see if a layer is a camera or light…

Check to see if you can add an effect to it (lights and cameras cannot have effects) by sending this test:

if(activeLayer (“Effects”) == null)
{
do something
}

Surely, there must be another way?

Take care,

Nick