extends CanvasLayer


# Called when the node enters the scene tree for the first time.
func _ready() -> void:
	
	update_progress_bar(80)
	
	
	pass # Replace with function body.


# Called every frame. 'delta' is the elapsed time since the previous frame.
func _process(delta: float) -> void:
	pass



func update_progress_bar(value: float):
	var start_value = $ProgressBar.value
	var percent = 0
	
	while  percent < 100:
		var ease = expo_ease_in_out(start_value, value, percent)
		$ProgressBar.value = ease
		percent += 1
		await get_tree().create_timer(0.05).timeout



func expo_ease_in_out(start: float, end: float, percent: int) -> float:
	var t: float = clamp(float(percent) / 100.0, 0, 1.0)
	var change: float = end - start
	
	if t == 0:
		return start
	if t == 1.0:
		return end
		
	if t < 0.5:
		return change / 2 * pow(2, 20 * t - 10) + start
	else:
		return change / 2 * (-pow(2, -20 * t + 10) + 2) + start