Building an air-hockey rival

Air hockey is probably one of the most popular games enjoyed by players of all ages during the golden age of arcades, and they are still found everywhere. With the advent of touchscreen mobile devices, developing an air-hockey game is a fun way to not only test physics engines, but also to develop intelligent rivals despite the apparently low complexity of the game.

Getting ready

This is a technique based on some of the algorithms that we learned in Chapter 1, Movement, such as Seek, Arrive, and Leave, and the ray casting knowledge that is employed in several other recipes, such as path smoothing.

It is necessary for the paddle game object to be used by the agent to have the AgentBehaviour, Seek, and Leave components attached, as it is used by the current algorithm. Also, it is important to tag the objects used as walls, that is, the ones containing the box colliders, as seen in the following figure:

Finally, it is important to create an enum type for handling the...