class_name CanvasUtil extends Object


static func shake_layer(layer: CanvasLayer, duration: float, delta := 2.0, fps := 20.0) -> void:
	var tween = layer.create_tween()
	# shake layer's offset
	var origin_offset = layer.offset
	var count = int(duration * fps)
	var delta_t = 1.0 / fps
	for i in range(count):
		var offset = Vector2(randf_range(-delta, delta), randf_range(-delta, delta))
		tween.tween_property(layer, "offset", origin_offset + offset, delta_t)
	# tween back to origin
	tween.tween_property(layer, "offset", origin_offset, delta_t)