具体内容如下

using UnityEngine;using System.Collections; public class TelesopicView : MonoBehaviour {  public float zoomLevel = 2.0f; public float zoomInSpeed = 100.0f; public float zoomOutSpeed = 100.0f;  private float initFOV;  void Start() { //获取当前摄像机的视野范围 initFOV = Camera.main.fieldOfView; }  void Update() { if(Input.GetMouseButton(0)) { ZoomInView(); } else { ZoomOutView(); } }  //放大摄像机的视野区域 void ZoomInView() { if (Mathf.Abs(Camera.main.fieldOfView - (initFOV / zoomLevel)) < 3.0f) { Camera.main.fieldOfView = initFOV / zoomLevel; } else if (Camera.main.fieldOfView - (Time.deltaTime * zoomInSpeed) >= (initFOV / zoomLevel)) { Camera.main.fieldOfView -= (Time.deltaTime * zoomInSpeed); } }  //缩小摄像机的视野区域 void ZoomOutView() { if (Mathf.Abs(Camera.main.fieldOfView - initFOV) < 3.0f) { Camera.main.fieldOfView = initFOV; } else if (Camera.main.fieldOfView + (Time.deltaTime * zoomOutSpeed) <= initFOV) { Camera.main.fieldOfView += (Time.deltaTime * zoomOutSpeed); } }}

将脚本 TelescopicView 添加到 Main Camera 上。Zoom Level 可以调节视图能放大到什么程度;Zoom In Speed 调节视图的放大速度;Zoom Out Speed 调节视图缩小的速度。