Motor
Builds the motor (mx, my, mz, mw), unitized and zero-sanitized.
The flat weight norm √(mz² + mw²) divides out, so a constructed motor always stores mz² + mw² = 1 — what makes mz and mw the true half-angle sine and cosine. Signed zeroes sanitize to +0.0. A weight norm that rounds to zero at the SCALE quantum leaves nothing to unitize by, and no motor is built.
Parameters
mx
The e41 component.
my
The e42 component.
mz
The e43 component.
mw
The 𝟙 component.
Throws
when the flat weight norm rounds to zero.