# A rotation is built from an axis (which way the spin-pole points) and an
# angle (how far to turn around it). Up is the vertical axis, so spinning
# around Up turns a thing like a record on a turntable.
SpinAxis := vector3{ Left := 0.0, Up := 1.0, Forward := 0.0 }
HalfTurn := MakeRotationDegrees(SpinAxis, 180.0)