Unity摄像机移至某物体附近，观察此物体

项目需求：要近距离观察上图的圆柱
解决核心：把摄像机移动到，圆柱前方，离圆柱z坐标5个单位的地方。
参考代码：此处移动用的是DOTween插件的“DOLocalMove（目标位置，耗费时间）；”方法。

1using System.Collections;
2using System.Collections.Generic;
3using UnityEngine;
4using DG.Tweening;
5
6
7public class TestCameraMove : MonoBehaviour
8{
9    private Vector3 cameraOriginPos = new Vector3(0,1,-10);
10    public Transform targetTra;
11    //private Vector3 aimPos = targetGOPos - new Vector3();
12    public bool flag;
13    void Awake()
14    {
15
16    }
17
18    void Start()
19    {
20        
21    }
22
23    void Update()
24    {
25
26    }
27    public void MoveCamera()
28    {
29        Vector3 aimPos = targetTra.localPosition - new Vector3(0,0,5);
30        if (!flag)
31        {
32            Camera.main.transform.DOLocalMove(aimPos,2);
33            flag = true;
34        }
35        else
36        {
37            Camera.main.transform.DOLocalMove(cameraOriginPos,2);
38            flag = false;
39        }
40    }
41}

实现效果: