Camearaでターゲットの周りを、ターゲットを見ながら回転 Unity

参考URL: http://answers.unity3d.com/questions/213108/rotate-camera-around-object.html

using UnityEngine;
using System.Collections;

public class CameraAnimation : MonoBehaviour
{
    private Transform myTransform;
    public Transform target;
    public float degrees = 10.0f;

    void Awake ()
    {
        myTransform = transform;
    }

    // Use this for initialization
    void Start ()
    {
    }
 
    // Update is called once per frame
    void Update ()
    {
        Vector3 relativePos = target.position - myTransform.position;
        Quaternion rotation = Quaternion.LookRotation(relativePos);
        myTransform.rotation = rotation;
        myTransform.RotateAround (target.position, Vector3.up, degrees * Time.deltaTime);
    }
}