smooth tracking.

Touch.cs

// attaching this code is more stable than OVRCameraRig/L,RHandAnchor.

using UnityEngine;
using System.Collections;

public class Touch : MonoBehaviour {
	
	public OVRInput.Controller controller;

	// Update is called once per frame
	void Update () {
		this.transform.position = OVRInput.GetLocalControllerPosition (controller);
		this.transform.rotation = OVRInput.GetLocalControllerRotation (controller);
	}
}