Apple Game Frameworks and Technologies: PhysicsCategory.floor was renamed (p 87)

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On page 86 is this line of code:

self.physicsBody?.contactTestBitMask = PhysicsCategory.player
                                     | PhysicsCategory.foreground

On page 87 is this text:

Notice here that the contactTestBitMask is set to both the PhysicsCategory.player | PhysicsCategory.floor categories

The text references PhysicsCategory.floor while the code references PhysicsCategory.foreground. foreground is what the code has referenced up until this line. I believe floor may have been renamed to foreground at some point and this reference didn’t get caught.

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