Visualization of the 3-sphere (S³) rendered via
stereographic projection. The camera view is an SO(4)
isometry, applied as s⋅p⋅t for each point p.
Controls
W/S pitch A/D yaw
Q/E roll ↑/↓ move
drag look
View transform
s: 1 + 0i + 0j + 0k
t: 1 + 0i + 0j + 0k
s = left quaternion, t = right quaternion