Can Dan Ebberts Light Falloff work on Layers within Nested Comps?

[Eoin Ryan]

Also, I’ve just realised this expression doesn’t work when you move the light past the object, only when you move the layer past the light. It’s probably a big ask but does anyone have a solution for this as well?!

Thanks,
Eoin

[Dan Ebberts]

Assuming that the comp with the light is named “Main” and that your sub-comp is a 3D layer in the main comp with Collapse Transformations turned on, this should work:


M = comp("Main");
L1 = M.layer("Light 1");
decay = .005;
noFalloff = 200;
P2 = toWorld(anchorPoint);
L2 = M.layer(thisComp.name);
d = length(L1.toWorld([0,0,0]),L2.toWorld(P2));
if (d < noFalloff){
value;
}else{
value/Math.exp((d - noFalloff)*decay);
}


A better solution is probably to upgrade to AE CS5.5, which has built-in light falloff.

Dan

[Dan Ebberts]

What’s the issue, exactly? What behavior were you expecting?

Dan

[Eoin Ryan]

Thanks for that Dan, it worked!

Yes I think an upgrade to CS5 might be in order but this will do nicely for now,

Thanks again,

Eoin