Rotate around scene with Touch Controllers

I managed to get a little starting point by myself, but this is not turning around the scene object. But the gesture you need to do with the controllers is close to the one known from other games.

public class RotateScene : MonoBehaviour
{
    public GameObject scene;
    public GameObject player;
    float speed = 2;

    void Update()
    {
        if (OVRInput.Get(OVRInput.Button.PrimaryHandTrigger) && OVRInput.Get(OVRInput.Button.SecondaryHandTrigger))
        {
            Vector3 rTouchVelo = OVRInput.GetLocalControllerVelocity(OVRInput.Controller.RTouch);
            Vector3 lTouchVelo = OVRInput.GetLocalControllerVelocity(OVRInput.Controller.LTouch);

           if (rTouchVelo.z > 0.0f && lTouchVelo.z < 0.0f)
            {
                player.transform.Rotate(new Vector3(0, -1 * (rTouchVelo.z * (speed)), 0));
            }
            else if(rTouchVelo.z < 0.0f && lTouchVelo.z > 0.0f)
            {
                player.transform.Rotate(new Vector3(0, 1 * (lTouchVelo.z * (speed)), 0));
            }          
        }
    }
}

Maybe someone can point me to the right direction?

Danny