Foreword

My first experiences with Andy Hanson’s work were with his visualizations of mathematical and geometric problems, such as his clever and engaging “Visualizing Fermat’s Last Theorem” (1990).[*] It was clear to me that he was a talented geometer and an excellent communicator, so when the SIGGRAPH conference started to bundle courses with its technical program I encouraged Andy to develop an advanced course on geometry. This book is the result of that course. His course is still doing well at SIGGRAPH—the audience overflowed a good-sized room at the conference this year. Even some of Andy’s students couldn’t get in.

As a computer graphics instructor I have been interested in the way quaternions represent 3D rotations and I hoped Andy’s book ...

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