For some reason I get a NullPointerException when I try to use my world. The error comes from this line of code:
I've double checked, and all those classes do in fact exist in my program. I got the error when I added HUD. I think this may be because it's an interface, and not an actor. Would that assumption be correct?
setPaintOrder(HUD.class, LightActor.class, Ground.class, UseableActor.class, Background.class);