40 lines
1.2 KiB
GDScript
40 lines
1.2 KiB
GDScript
extends Node
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# This will track the position of every pointer in its public `state` property, which is a
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# Dictionary, in which each key is a pointer id (integer) and each value its position (Vector2).
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# It works by listening to input events not handled by other means.
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# It also remaps the pointer indices coming from the OS to the lowest available to be friendlier.
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# It can be conveniently setup as a singleton.
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var state = {}
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var _os2own = {}
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func _unhandled_input(event):
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if event is InputEventScreenTouch:
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if event.pressed: # Down.
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if !_os2own.has(event.index): # Defensively discard index if already known.
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var ptr_id = _find_free_pointer_id()
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state[ptr_id] = event.position
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_os2own[event.index] = ptr_id
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else: # Up.
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if _os2own.has(event.index): # Defensively discard index if not known.
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var ptr_id = _os2own[event.index]
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state.erase(ptr_id)
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_os2own.erase(event.index)
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return true
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elif event is InputEventScreenDrag: # Movement.
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if _os2own.has(event.index): # Defensively discard index if not known.
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var ptr_id = _os2own[event.index]
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state[ptr_id] = event.position
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return true
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return false
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func _find_free_pointer_id():
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var used = state.keys()
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var i = 0
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while i in used:
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i += 1
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return i
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