Unity基础，相机跟随

设置相机跟随游戏目标：

1.保持相机位置始终跟随一个游戏目标

     在Camera下创建Script：  

 public Transform  targetTransform；//获得要跟随的目标位置      public Vector3 offset;                        //获得Camera与Target的位置偏移      Start（）{  offset=transform.position-targetTransform.position;  }      Update(){  tranform.position=targetTransform.position+offset;   }

2.保持相机在两个目标位置中间

    public Transform player1;    public Transform player2;    private Vector3 offer;    private Camera camera;    void Start () {        offer = transform.position - (player1.position+player2.position)/2;        camera = this.GetComponent<Camera>();    }    void Update () {        if (player1 == null || player2 == null) return;          transform.position = (player1.position + player2.position) / 2 + offer;          float distance = Vector3.Distance(player1.position, player2.position);        float size = distance * 0.58f;  //镜头距离比例        camera.orthographicSize = size;    }

3.Camera跟随，但有范围

    private GameObject gameObject=GameObject.FindGameObjectWithTag("__");    private Transform transform=gameObject.transform;    Vector3 targetPosition = transform.position;    float y = targetPos.y - _f;    if (y > _f) { y = _f; }    if (y < _f) { y = _f;}    this.transform.position = new Vector3(targetPos.x+_f,y,_f);