A TrackballCamera that responds to input from mouse, keyboard, joystick and touch, in order to rotate around its parent node while continuously facing it.
- stays around its parent node, even if it moves
- no gimbal lock (quaternions ♥)
- camera inertia for a smoother experience
- the parent node does not have to be centered in the camera's view
- a bunch of parameters to configure everything as you want it
- won't work on godot 3