Check for NULL objects

demo/scripts/HandRigger.gd

@@ -27,6 +27,7 @@ func _ready():
 
 func _process(_delta):
 	if tracking == null:
+		skeleton.hide()
 		return
 		
 	if Engine.is_editor_hint() and not tracking.run_in_editor:
@@ -35,6 +36,9 @@ func _process(_delta):
 		return
 
 	var frame : UltraleapFrame = tracking.get_last_frame()
+	if frame == null:
+		skeleton.hide()
+		return
 	if use_interpolation:
 		var interpolated_frame : UltraleapFrame = tracking.get_interpolated_frame(Time.get_ticks_usec())
 		if interpolated_frame != null:

demo/scripts/ImagePuller.gd

@@ -29,6 +29,9 @@ func _process(_delta):
 			image = tracking.get_right_image() if side == Side.Left else tracking.get_left_image()
 		else:
 			image = tracking.get_right_image() if side == Side.Right else tracking.get_left_image()
+			
+		if image == null:
+			return
 		
 		# Get image size
 		var image_size : Vector2i = image.get_size()

demo/scripts/OriginHands.gd

@@ -11,8 +11,9 @@ func _ready():
 	var scene : PackedScene = preload("res://models/Origin.tscn")
 	
 	dry_run = true
-	var n : int = set_hand(tracking.get_last_frame().left_hand, 0)
-	n = set_hand(tracking.get_last_frame().right_hand, n)
+	var new_frame : UltraleapFrame = UltraleapFrame.new()
+	var n : int = set_hand(new_frame.left_hand, 0)
+	n = set_hand(new_frame.right_hand, n)
 	dry_run = false
 	
 	print(str(n) + " bones")
@@ -26,6 +27,16 @@ func _ready():
 
 func _process(_delta):
 	var n : int = 0
+	
+	if tracking == null:
+		return
+	
+	var frame : UltraleapFrame = tracking.get_last_frame()
+	
+	# Dirty hack to check if the device is initialised.
+	# Should implement something like a flag later
+	if frame == null:
+		return
 
 	if use_interpolation:
 		var interpolated_frame : UltraleapFrame = tracking.get_interpolated_frame(Time.get_ticks_usec())