Unity 本地坐标到世界坐标，世界坐标到本地坐标

  public GameObject mTarget;
    public GameObject mPar; //这个注意一定要是mTarget的第一父物体。
 // Use this for initialization
 void Start () {
        string tarStr = string.Format("mtarget local:{0},world:{1}", mTarget.transform.localPosition, mTarget.transform.position);
        string parStr = string.Format("mPar local:{0},world:{1}", mPar.transform.localPosition, mPar.transform.position);
        Debug.Log(tarStr);
        Debug.Log(parStr);
        var t = mPar.transform.InverseTransformPoint(mTarget.transform.position);
        Debug.Log(t);
 }