Convert Standard Joystick Asset to Circular Bounds

The standard joystick.cs asset utilizes rectangular boundaries. I was hoping someone might help me in converting them to circular. Rectangular boundaries are giving my joysticks “dead zones” where moving your finger does nothing (since it is stuck in the corner). If someone could please help me out, I’d appreciate it. I really SUCK at trig, so this is not easy for me to figure out heh.

anybody?