Game Development with Swift

Spawning the star power-up at random

We still need to add the star power-up into the world. We can randomly spawn a star every 10 encounters to add some extra excitement. Follow these steps to add the star logic:

1. Add a new instance of the Star class as a constant on the GameScene class:

   let powerUpStar = Star()

2. Call the star's spawn function, anywhere inside the GameScene didMoveToView function:

   // Spawn the star, out of the way for now
   powerUpStar.spawn(world, position: CGPoint(x: -2000, y: - 2000))

3. Inside the GameScene didSimulatePhysics function, update your new encounter code as follows:

   // Check to see if we should set a new encounter: if player.position.x > nextEncounterSpawnPosition { encounterManager.placeNextEncounter( nextEncounterSpawnPosition) ...