鲨鱼炸弹小游戏总结

    void Start()
    {
        GUITexture gui = GetComponent<GUITexture>();
        // GUITexture的pixelInset值分别为：
        //width: 510  height: 340
        // x: -255   y:  -170
        Rect r = new Rect();
        r.width = Screen.width;
        r.height = Screen.height;
        float m = 510 / -255f;
        float n = 340 / -170f;
        r.x = Screen.width / m;
        r.y = Screen.height / n;
        gui.pixelInset = r;
    }

float anglespan = 0;
    void Update()
    {
        //判断飞机是否超过屏幕的可视范围，如果超过就重置飞机的位置 ，20是根据mainCamera的Far来设定的
        if (transform.position.x > 20)
        {
            speed = Random.Range(8f, 12f);
            transform.position = new Vector3(-20f, transform.position.y, transform.position.z);
        }
        transform.Translate(0, 0, speed * Time.deltaTime);

        //造成2.5D效果  nextZ可能的值为（初始值为0）：2  4  6
        if (nextZ > mainCamera.transform.position.z)
        {
            //作者的方法：
            //float mx = 3 * Mathf.Sin(transform.position.z / 2) * Time.deltaTime;
            //float mz = -Mathf.Sin(transform.position.z / 2) * Time.deltaTime;
            // mainCamera.gameObject.transform.Translate(mx, 0, mz);

            float angle = Time.deltaTime * 5.7f;
            //改变背景图和camera的旋转，造成2.5D的效果
            mainCamera.gameObject.transform.Rotate(Vector3.up, angle);
            gameBackground.gameObject.transform.Rotate(Vector3.back, angle);

            //我的方法：计算摄像机每次旋转的角度
            anglespan = mainCamera.gameObject.transform.localEulerAngles.y - anglespan;
            float distance = Vector3.Distance(gameBackground.transform.position, mainCamera.transform.position);
            Vector3 zz = new Vector3(
                   -distance * Mathf.Sin(anglespan * Mathf.Deg2Rad),
                   0,
                   distance * (1 - Mathf.Cos(anglespan * Mathf.Deg2Rad))
                );
            mainCamera.gameObject.transform.Translate(zz * Time.deltaTime);
        }