ABSTRACT
The first of these problems is fairly easy to resolve and is the subject of part IV of this book.
The second is more complex: it is the difference between a complete rigid-body physics system and the mass-aggregate systems we’ve seen so far. To add rotations we’ll need to go backward in the capability of our engine. We’ll need to remove a good deal of functionality and rebuild it based on full rotating rigid bodies. This will take this part and part V-almost the rest of the book.
