extends Spatial

## NOTE: LightLevel Detector is on Layer 20. Keep this layer hidden from main camera

var lightLevel : float

func _process(_delta):
	var o = global_transform.origin
	$Viewport/Camera.global_transform.origin = Vector3(o.x, o.y + 0.5, o.z)
	var image : Image = $Viewport.get_texture().get_data()
	var floats : Array = []
	
	image.lock()
	
	for y in range(0, image.get_height()):
		for x in range(0, image.get_width()):
			var pixel = image.get_pixel(x,y)
			var lightVal = (pixel.r + pixel.g + pixel.b) / 3
			floats.append(lightVal)
	lightLevel = average(floats)
	image.unlock()

func average(numbers : Array) -> float:
	var sum = 0.0
	for n in numbers:
		sum += n
	return sum / numbers.size()