unity摄像机的平滑过渡,平滑缓冲

using System.Collections.Generic;
using UnityEngine;
/// <summary>
/// 相机从一个点到另一个点的平滑过渡,平滑缓冲
/// </summary>
public class LiaGeQiu : MonoBehaviour {
   public GameObject cameraon;//初始摄像机的位置
   public GameObject camerto;//另一个点的位置
   private float speed = 1f;//缓冲的时间  时间越大缓冲速度越慢
   private Vector3 velocity;//如果是3D场景就用Vector3,2D用Vector2
   // Use this for initialization
   void Start () {
       
   }
   
   // Update is called once per frame
   void Update () {
      
           cameraon.transform.position = new Vector3(Mathf.SmoothDamp(cameraon.transform.position.x, camerto.transform.position.x,
               ref velocity.x, speed), Mathf.SmoothDamp(cameraon.transform.position.y, camerto.transform.position.y,
               ref velocity.y, speed),Mathf.SmoothDamp (cameraon.transform.position.z,camerto.transform.position.z ,ref velocity.z , speed));
       
   }
}