C# one-line getters to catch Vive cotrollers

ViveControllersTest.cs

/* * * * * * * *
PUT THESE AS CLASS MEMBERS
* * * * * * * * */

SteamVR_Controller.Device _leftController;
private SteamVR_Controller.Device leftcontroller
{
    get
    {
        return _leftController ?? ((SteamVR_Controller.GetDeviceIndex(SteamVR_Controller.DeviceRelation.FarthestLeft) == -1) ? null : _leftController = SteamVR_Controller.Input(SteamVR_Controller.GetDeviceIndex(SteamVR_Controller.DeviceRelation.FarthestLeft)));
    }
}

SteamVR_Controller.Device _rightController;
private SteamVR_Controller.Device rightcontroller
{
    get
    {
        return _rightController ?? (((SteamVR_Controller.GetDeviceIndex(SteamVR_Controller.DeviceRelation.FarthestRight)) == -1) ? null : _rightController = SteamVR_Controller.Input((SteamVR_Controller.GetDeviceIndex(SteamVR_Controller.DeviceRelation.FarthestRight))));
    }
}

/* * * * * * * * * EXAMPLE OF USE IN UPDATE
    void Update ()
    {
        //if (leftcontroller.GetPressDown(SteamVR_Controller.ButtonMask.Grip))
        if(leftcontroller != null)
        {
            if (leftcontroller.GetPressDown(EVRButtonId.k_EButton_Grip))
            {
                Debug.Log(string.Format("{0}", EVRButtonId.k_EButton_Grip.ToString()));
            }

            if (leftcontroller.GetPressDown(EVRButtonId.k_EButton_Axis0))
            {
                Vector2 axispos = leftcontroller.GetAxis(EVRButtonId.k_EButton_Axis0);
                Debug.Log(string.Format("{0} : axis0 - {1}", axispos, EVRButtonId.k_EButton_Axis0.ToString()));
            }
            if (leftcontroller.GetPressDown(EVRButtonId.k_EButton_Axis1))
            {
                Vector2 axispos = leftcontroller.GetAxis(EVRButtonId.k_EButton_Axis1);
                Debug.Log(string.Format("{0} : axis1 - {1}", axispos, EVRButtonId.k_EButton_Axis1.ToString()));
            }
            if (leftcontroller.GetPressDown(EVRButtonId.k_EButton_Axis2))
            {
                Vector2 axispos = leftcontroller.GetAxis(EVRButtonId.k_EButton_Axis2);
                Debug.Log(string.Format("{0} : axis2 - {1}", axispos, EVRButtonId.k_EButton_Axis2.ToString()));
            }
            if (leftcontroller.GetPressDown(EVRButtonId.k_EButton_Axis3))
            {
                Vector2 axispos = leftcontroller.GetAxis(EVRButtonId.k_EButton_Axis3);
                Debug.Log(string.Format("{0} : axis3 - {1}", axispos, EVRButtonId.k_EButton_Axis3.ToString()));
            }
            if (leftcontroller.GetPressDown(EVRButtonId.k_EButton_Axis4))
            {
                Vector2 axispos = leftcontroller.GetAxis(EVRButtonId.k_EButton_Axis4);
                Debug.Log(string.Format("{0} : axis4 - {1}", axispos, EVRButtonId.k_EButton_Axis4.ToString()));
            }
            if (leftcontroller.GetPressDown(EVRButtonId.k_EButton_DPad_Left))
            {
                Vector2 axispos = leftcontroller.GetAxis(EVRButtonId.k_EButton_DPad_Left);
                Debug.Log(string.Format("{0}", EVRButtonId.k_EButton_DPad_Left.ToString()));
            }
            if (leftcontroller.GetPressDown(EVRButtonId.k_EButton_DPad_Right))
            {
                Vector2 axispos = leftcontroller.GetAxis(EVRButtonId.k_EButton_DPad_Right);
                Debug.Log(string.Format("{0}", EVRButtonId.k_EButton_DPad_Right.ToString()));
            }
        }
        else
        {
            Debug.LogWarning("No controllers connected");
        }
    }
* * * * * * * * * * * * * * * * */