Unity摄像机移至某物体附近观察此物体

using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using DG.Tweening;


public class TestCameraMove : MonoBehaviour
{
 private Vector3 cameraOriginPos = new Vector3(0,1,-10);
 public Transform targetTra;
 //private Vector3 aimPos = targetGOPos - new Vector3();
 public bool flag;
 void Awake()
 {

 }

 void Start()
 {
 
 }

 void Update()
 {

 }
 public void MoveCamera()
 {
 Vector3 aimPos = targetTra.localPosition - new Vector3(0,0,5);
 if (!flag)
 {
  Camera.main.transform.DOLocalMove(aimPos,2);
  flag = true;
 }
 else
 {
  Camera.main.transform.DOLocalMove(cameraOriginPos,2);
  flag = false;
 }
 }
}