Retrofitting the Player class for flight

We need to perform a few quick setup tasks before we can react to player input. We will remove some of our older testing code and add a physics body to the Player class.

The Beekeeper

First, clean up the old bee physics tests from the last chapter. Open GameScene.swift, find didMove, and locate the bottom two lines; one sets a mass for bee2, and the other applies an impulse to bee2. Remove these two lines:

bee2.physicsBody?.mass = 0.2 
bee2.physicsBody?.applyImpulse(CGVector(dx: -25, dy: 0))

Updating the Player class

We need to give the Player class its own update function. We want to store player-related logic in Player and we need it to run before every frame:

1. Open Player.swift and add the following function inside Player:

   func update() { } 

2. In GameScene.swift, add this code at the bottom of the GameScene class:

   player.update() 
           }         override func update(_ currentTime: TimeInterval) { 
   

3. Perfect. The GameScene class will call the Player class...