[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
}