In this chapter, we built a fun AR ball game. Just as mobile games have flourished, the potential opportunity for AR games is equally enormous. In our game, we use the desk or coffee table in front of you as the playing field, set up a ball game, and challenge you to throw balls at the target goal or basket. The game keeps score and lets you switch between multiple ball game levels.

We created a white box design for the first iteration, including a ball court with a floor and a goal. The goal has an invisible collider used to trigger events when the ball makes a hit. We relied on Unity events to bubble up messages from the collision and ball throw to the ball game manager and to the game controller. Each layer remains reasonably isolated from the other layers, allowing the app to be expanded to support multiple games and variations of graphic assets.

The AR started simply...