4 ms·
I really like this explanation. The negative square roots explanation never sat right with me in high school and I think this touches on why.
by mmcdermott 5y ago
I really like this explanation. The negative square roots explanation never sat right with me in high school and I think this touches on why.
- CamperBob2 5y agoThe way I think about it: - To express direction in Cartesian space, you need signed numbers - To express 2D rotation, you need imaginary numbers - To express 3D rotation, you "need" quaternions (in the sense that they're the smallest way to represent an arbitrary rotation)