2019-08-192DCamera控制 相机

写个枚举控制相机

   public enum CameraType
    {
        Vertival,
        Horizontal,
        Normal
    }

    public CameraType cameraType;
    public float dampTime = 1.5f;
    public Transform target;

    //相机移动速度，初始速度清零
    private Vector3 velocity = Vector3.zero;

    //相机单列
    private static CameraCtrl instance;
    public static CameraCtrl Instance
    {
        get
        {
            return instance;
        }
    }

    //屏幕的默认宽高的1/100（预编译）

#if UNITY_ANDROID
    private static float devHeight=8.54f;
    private static float devWidth=4.8f;
#elif UNITY_IPHONE
    private static float devHeight=9.6f
    private static float devWidth=6.4f;
#else
    private static float devHeight = 19.20f;
    private static float devWidth = 10.80f;
#endif

    void Awake()
    {
        instance = this;

        //屏幕适配
        float screenHeight = Screen.height;
        float orthographicSize = this.GetComponent<Camera>().orthographicSize;
        float aspectRatio = Screen.width * 1.0f / Screen.height;
        float cameraWidth = orthographicSize * 2 * aspectRatio;

        if (cameraWidth < devWidth)
        {
            orthographicSize = devWidth / (2 * aspectRatio);
            Debug.Log("new orthographicSize=" + orthographicSize);
            this.GetComponent<Camera>().orthographicSize = orthographicSize;
        }
    }
    void LateUpdate()
    {
        if (target)
        {
            SetCamera();
        }
        {
            SetTarget();
        }
    }

    /// <summary>
    /// 设置相机
    /// </summary>
    void SetCamera()
    {
        Vector3 point = GetComponent<Camera>().WorldToViewportPoint(target.position);
        Vector3 delta = target.position - GetComponent<Camera>().ViewportToWorldPoint(new Vector3(0.5f, 0.5f, point.z));
        Vector3 destination = transform.position + delta;
        switch(cameraType)
        {
            case CameraType.Vertival: //竖直相机
                transform.position = Vector3.SmoothDamp(transform.position, new Vector3(transform.position.x, destination.y, destination.z), ref velocity, dampTime);
                break;
            case CameraType.Horizontal: //水平相机
                transform.position = Vector3.SmoothDamp(transform.position, new Vector3(destination.x, transform.position.y, destination.z), ref velocity, dampTime);
                break;
            case CameraType.Normal:    //无限制相机
                transform.position = Vector3.SmoothDamp(transform.position, destination, ref velocity, dampTime);
                break;
            default:
                break;

        }

    }
    /// <summary>
    /// 设置目标
    /// </summary>
    void SetTarget()
    {
        target = GameObject.FindGameObjectWithTag("Player").transform;
    }