Imagine if you have to show some kind of game status on screen for the tracked user… You can just have that object always in front of the user in the CAVE. There are two ways:

1) Use OnUpdate() to always update that object’s position to User0’s position. OR

2) When initializing, use self.movable().setParent(‘User0Head’) to attach it to the User0Head entity. You can then set the position of the object, and it’ll be in relation to the parent. You won’t need to use OnUpdate() to position it anymore!