Chapter     8

Contacts and Collisions

Didn’t You Cover this Already?

Yes, I did cover much of this already. Back in Chapter 5, you were introduced to contacts and collisions so that you could have your Ratz and coins bounce off of each other. But you’re not done yet. You need a way for your enemies to keep from wandering around the base level. You need your player to be able to collect coins and kick vermin off the ledges after knocking them unconscious. Also, to add some challenge, your hero will “die” if it runs into vermin that are not currently unconscious. All of these additions require careful handling of contacts and collisions.

Contacts vs. Collisions

So what is the difference between these two events, anyway? Think of it in this overly ...

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