Unity 控制摄像机跟随运动物体

using UnityEngine;
using System.Collections;

public class FollowTarget : MonoBehaviour {

public Transform playerTransform;  //把运动物体拖放到此处
private Vector3 offset;

// Use this for initialization
void Start () {

offset =  transform.position - playerTransform.position;  //计算初始物体与相机的偏移距离

}

// Update is called once per frame
void Update () {
transform.position =  playerTransform.position + offset;   //运动物体当前位置 加上 原始偏移
}
}