extends Spatial

export var scroll_speed = 120
export var limit_z = 80
export var add_z = -80

export var angle_add = 20
export var x_shift_range = 80
export var rotz_range = 10
var angle = 0

func _ready():
	pass # Replace with function body.

func _process(delta):
	angle += (angle_add * delta)
	if angle > 360.0:
		angle -= 360.0
		
	var rz = rotz_range * sin(deg2rad(sin(deg2rad(-angle))))
	$BgModel.rotation.z = rz
	$BgModel.translation.x = x_shift_range * sin(deg2rad(angle))
	
	$BgModel.translation.z += scroll_speed * delta
	if $BgModel.translation.z >= limit_z:
		$BgModel.translation.z += add_z