WheelHit.sidewaysSlip 侧面滑动

// Prints "braking slip!" when tire slips badly.
// 当轮胎滑动时打印"Braking Slip!"
function FixedUpdate() {
	var hit : WheelHit;
	var wheel : WheelCollider = GetComponent(WheelCollider);
	if( wheel.GetGroundHit( hit ) ) {
		if( hit.forwardSlip > 0.5 )
			print ("braking slip!");
	}
}