steeringAxis
The direction of the axis that the wheel pivots around to steer the vehicle.
Declaration
var steeringAxis: SCNVector3 { get set }Discussion
This vector is expressed in the coordinate space of the node containing the vehicle’s chassis. The default steering axis is {0.0, -1.0, 0.0}.
When you steer a wheel using the vehicle’s setSteeringAngle(_:forWheelAt:) method, the wheel pivots relative to this axis. For example, you can implement a vehicle whose rear wheels steer opposite its front wheels by reversing this vector’s direction for the rear wheels and then applying the same steering angle to all wheels.