Swift Game Development - Third Edition

Pushing Pierre forward

This style of game usually moves the world forward at a constant speed. Rather than applying force or impulse, we can manually set a constant velocity for Pierre during every update. Open the Player.swift file and add this code at the bottom of the update function:

// Set a constant velocity to the right: 
self.physicsBody?.velocity.dx = 200 

Run the project. Our protagonist penguin will move forward, past the swarm of bees and through the world. This works well, but you will quickly notice that the ground runs out as Pierre moves forward, as shown in this screenshot:

Recall that our ground is only as wide as the screen width ...