/**
Convenience class to make listening to world changes easier.
Add WorldListeners to a World, and WorldManager will notify them when world changes.
*/
export class WorldListener {
constructor(){}
/**
Called when user enters the world.
@param welcome Welcome message
*/
entered(welcome) {}
/**
Called when a new object is added to the scene
@param vrobject a VRObject, typically a Client, added to the scene.
*/
added(vrobject){}
/**
Called when an object is removed from the scene
@param vrobject a VRObject, typically a Client, removed from the scene
*/
removed(vrobject){}
}