extends CanvasLayer

@onready var rect = $ColorRect as ColorRect


func _ready() -> void:
	rect.material.set("shader_parameter/intensity", 0.0)


var tween: Tween


# duration 最短 1.5s
func dizzy(duration := 3.5, intensity := 1.5) -> void:
	if tween and tween.is_valid():
		tween.kill()
	show()
	tween = create_tween()
	tween.tween_property(rect.material, "shader_parameter/intensity", intensity, 0.5)
	tween.tween_interval(maxf(duration - 1.5, 0.01))
	tween.tween_property(rect.material, "shader_parameter/intensity", 0.0, 1.0)
	tween.finished.connect(hide)