效果图：

 

 

设置如下：

摄像机设置：using System.Collections;using System.Collections.Generic;using UnityEngine;public class CameraFllow : MonoBehaviour {    public GameObject tank1;    public GameObject tank2;    Vector3 offset;    // Use this for initialization    void Start () {      offset=transform.position- (tank1.transform.position +tank2.transform.position)/2;//相机默认偏移量(相机看向坦克中心的向量)    }        // Update is called once per frame    void Update () {        if (tank1==null||tank2==null)        {            return;        }        transform.position = (tank1.transform.position + tank2.transform.position) / 2 + offset;//相机时刻跟踪中心位置        float dis = Vector3.Distance(tank1.transform.position,tank2.transform.position);//两个坦克距离        GetComponent
     
      ().orthographicSize = dis * 0.4f;//坦克距离有正交摄像机的Size成比例            }}