Physics hinge joint type.
optionalreference_angle:Null<Float>
The bodyB angle minus bodyA angle in the reference state (radians).
optionalmax_motor_torque:Null<Float>
The maximum motor torque used to achieve the desired motor speed. Usually in N-m.
optionalread onlyjoint_angle:Null<Float>
Read only fields, available from physics.get_joint_properties().