Why isn’t Mouse delta outputing a
value?
&
I have followed a tutorial online that
shows how to get it set up using a
render target.
It’s quite likely that the widget is stealing focus and prevents the Player Controller from receiving input. Either make the widget hit test invisible (if you do not want to interact with it) and rely on the player controller processing input; or handle input processing in the widget itself. You can override onMouseMove and Touch (and many other events):
Perhaps you could explore how gestures work at this point, too.