[Unity基础]镜头管理类

一个游戏中可能会有各种类型的镜头，例如有时候是第一人称，有时是第三人称，有时又会给个特写等等，因此可以定义一个镜头类型枚举，在不同的场合进行切换，管理起来很方便。

CameraManager.cs

 using UnityEngine;
 using System.Collections;

 //镜头类型
 public enum CameraType
 {
     NotFollow,        //不跟随(可以自由设置镜头)
     FixedFollow,      //固定跟随
     SmoothFollow,     //平滑跟随
 }

 public class CameraManager : MonoSingletion<CameraManager> {

     private Camera camera;
     private Transform cameraTra;
     private Transform targetTra;
     private CameraType cameraType;

     //固定跟随参数
     private Vector3 fixedPosOffset;//位置偏移

     //设置镜头
     public void SetCamera(Camera camera)
     {
         this.camera = camera;
         cameraTra = camera.gameObject.transform;
     }

     //设置目标
     public void SetTarget(GameObject go)
     {
         targetTra = go.transform;
     }

     private void LateUpdate()
     {
         if ((cameraTra == null) || (targetTra == null))
         {
             return;
         }

         switch (cameraType)
         {
             case CameraType.NotFollow:
                 return;
             case CameraType.FixedFollow:
                 FixedFollow();
                 break;
             case CameraType.SmoothFollow:
                 break;
             default:
                 break;
         }
     }

     //-----------------------------------------------不跟随 start
     public void SetNotFollow()
     {
         cameraType = CameraType.NotFollow;
     }
     //-----------------------------------------------不跟随 end

     //-----------------------------------------------固定跟随 start
     public void SetFixedFollow(Vector3 fixedPosOffset, Vector3 rot)
     {
         cameraType = CameraType.FixedFollow;
         this.fixedPosOffset = fixedPosOffset;
         cameraTra.localEulerAngles = rot;
     }

     private void FixedFollow()
     {
         cameraTra.position = targetTra.position + fixedPosOffset;
     }
     //-----------------------------------------------固定跟随 end
 }