extends Camera2D

var shake_tween: Tween

func shake(duration: float, intensity: float, constant: bool = false) -> void:
	if shake_tween and shake_tween.is_valid():
		shake_tween.kill()

	offset = Vector2.ZERO
	shake_tween = create_tween()
	shake_tween.set_pause_mode(Tween.TWEEN_PAUSE_PROCESS)

	var step_duration := 0.05
	var steps := maxi(1, int(duration / step_duration))

	for i in steps:
		var t := float(i) / float(steps)
		var si := intensity
		if not constant:
			si *= 1.0 - t
		var target := Vector2(
			randf_range(-si, si),
			randf_range(-si, si)
		)
		shake_tween.tween_property(self, "offset", target, step_duration)

	shake_tween.tween_property(self, "offset", Vector2.ZERO, 0.05)