Input event type for screen touch events.
(only available on mobile devices)
Stores multi-touch press/release information. Supports touch press, touch release and [member index] for multi-touch count and order.
https://docs.godotengine.org/en/3.3/tutorials/inputs/inputevent.html
The touch index in the case of a multi-touch event. One index = one finger.
The touch position.
If [code]true[/code], the touch's state is pressed. If [code]false[/code], the touch's state is released.