private void Start()
    {
        wheelMeshLocalRotations    = new Quaternion[4];
        wheelColliderFrictionInfos = new WheelColliderFrictionInfo[4];

        for (int i = 0; i < 4; i++)
        {
            wheelMeshLocalRotations[i]    = wheelMeshes[i].transform.localRotation;
            wheelColliderFrictionInfos[i] = new WheelColliderFrictionInfo(wheelColliders[i]);
        }

        rigidBody = GetComponent <Rigidbody>();
        rigidBody.centerOfMass = centerOfMassOffset;

        currentTorque = totalTorque - (tractionControl * totalTorque);
    }
    // Either set all wheel colliders to zero friction, or reset them to defaults
    public void WheelCollidersFriction(bool wantFriction)
    {
        for (int i = 0; i < 4; i++)
        {
            WheelCollider wheelCollider = wheelColliders[i];

            WheelFrictionCurve forwardCurve  = wheelCollider.forwardFriction;
            WheelFrictionCurve sidewaysCurve = wheelCollider.sidewaysFriction;

            // Return to original values
            if (wantFriction)
            {
                WheelColliderFrictionInfo originalInfo = wheelColliderFrictionInfos[i];

                //forwardCurve.extremumValue = originalInfo.forwardExtremumValue;
                //forwardCurve.asymptoteValue = originalInfo.forwardAsymptoteValue;

                sidewaysCurve.extremumValue  = originalInfo.sidewaysExtremumValue;
                sidewaysCurve.asymptoteValue = originalInfo.sidewaysAsymptoteValue;

                // tractionControl = 0.25f;
                steerHelper = 0.5f;
            }
            // Set frictions to minimum
            else
            {
                //forwardCurve.extremumValue = 0.0f;
                //forwardCurve.asymptoteValue = 0.0f;

                sidewaysCurve.extremumValue  = 0.0f;
                sidewaysCurve.asymptoteValue = 0.0f;

                tractionControl = 0.0f;
                steerHelper     = 0.0f;
            }

            wheelCollider.forwardFriction  = forwardCurve;
            wheelCollider.sidewaysFriction = sidewaysCurve;
        }
    }