OptionalrotationRotation about the plane normal (degrees). Default range -180..180.
OptionaluTranslation along the in-plane uDirection. Default range -100..100.
OptionaluIn-plane reference direction for the u translation. Projected onto the
plane and normalized; defaults to an arbitrary perpendicular of the normal.
OptionalvTranslation along normal × u. Default range -100..100.
Per-DOF ranges for a planar joint (two in-plane translations + a rotation).