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.
http://docs.godotengine.org/en/3.0/tutorials/inputs/inputevent.html
- Touch index in the case of a multi-touch event. One index = one finger.
- Touch position.
- If [code]true[/code] the touch's state is pressed. If [code]false[/code] the touch's state is released.