Events allow the decoupling of the source of the event from the consumer of the event. Basically, events are a messaging system where one object triggers an event. Any other objects in the project can listen for the event. It can subscribe to a specific function to be called when the event occurs.
Events are a very rich topic, and we can only introduce them here. We will be using the event pattern in various contexts throughout this book, including UI, collisions, and XR interactions. For more information on using Unity events, there are a lot of good references online, including the Unity tutorials at https://learn.unity.com/tutorial/events-uhandhttps://learn.unity.com/tutorial/create-a-simple-messaging-system-with-events.
For this example, we'll create a separate input controller that reads the input button's state and invokes an event and then modify the BalloonController to subscribe to the events. The following diagram...
