Event Dispatchers

• If you notice in the BP_Pickup_Parent they have used a Event Dispatcher
• These are documented here
• The basic problem:
  • The parent class does not know what to do when the item is picked up.
    • For health types, we change health.
    • For ammo types, we change ammo
    • For a portkey from Harry Potter, we would change the player's location.
  • But we do know that Something will need to happen when the item is picked up.
• Declare an event dispatcher.
  • 
  • You can add input parameters if you wish.
  • Or copy the function signature from another event.
• They then call it in the parent.
  • If it is not set nothing happens.
  • 
  • This node can be added by typing call
• In the child (ammo in this case)
  • Declare the function
  • And register the callback.
  • 
• You can apparently have multiple events listed.
  • In my probability spawner
  • 
  • I register this event to be called as well.
  • So when you pickup something from the spawner
    1. The amount is modified in the HUD
    2. The Spawner is called to generate a new item.