Hi again! I now had a chance to try this expression out on a project, and although it works perfectly for what I described earlier, I now see that I forgot to add an important detail earlier. The child layers (in this case NULLs) also has to ignore the rotation of the parent layer. Right now, when I rotate the Parent, the child layers rotate around the parents anchor point. Is there a way to ignore the positional displacement that comes from rotating the parent layer? (I hope im making sense here…) Anyway THANKS!
p = toComp(anchorPoint);
yClamp=clamp(p[1],0,890);
parent.fromComp([p[0],yClamp])