Or over the reals. I have studied quaternions a number of times but never studied 3d graphics. They are interesting algebraically as part of the sequence of div

Or over the reals. I have studied quaternions a number of times but never studied 3d graphics. They are interesting algebraically as part of the sequence of divison algebras reals, complex numbers, quaternions, octonions, nothing. https://en.m.wikipedia.org/wiki/Hurwitz%27s_theorem_(composition_algebras) https://en.m.wikipedia.org/wiki/Hurwitz%27s_theorem_(composi...