Unity3D写雷电游戏（三）

现在开始真正的游戏元素的编写了。

第一步，让飞机动起来。

首先是飞机的前进，通常2D中的做就是背景的循环滚动。

在3D中我们可以让摄像机移动，背景我们可以做超一个大地形。。在地形上摆一些固定的东西。

    // Update is called once per frame
    void Update () {
        
        TurnLeft = false;
        TurnRight = false;

        if (Input.GetKey(KeyCode.W))
        {        
            Vector3 screenPos = Camera.mainCamera.WorldToScreenPoint(this.transform.position);
            //print(screenPos.y);
            if (Screen.height > screenPos.y)
                this.transform.Translate(Vector3.forward * Time.deltaTime * m_nMoveSpeed);
        }
        if (Input.GetKey(KeyCode.S))
        {
            Vector3 screenPos = Camera.mainCamera.WorldToScreenPoint(this.transform.position);
            if (0 < screenPos.y)
                this.transform.Translate(Vector3.forward * Time.deltaTime * -m_nMoveSpeed);
        }
        
        if (Input.GetKey(KeyCode.A))
        {
            Vector3 screenPos = Camera.mainCamera.WorldToScreenPoint(this.transform.position);
            if (0 < screenPos.x)
                this.transform.Translate(Vector3.left * Time.deltaTime * m_nMoveSpeed);
            //向左转
            if (CurRotation < RotateLimit)
            {
                print(CurRotation);
                CurRotation += RotateSpeed;
            }
            TurnLeft = true;
        }
    
        
        if (Input.GetKey(KeyCode.D))
        {
            Vector3 screenPos = Camera.mainCamera.WorldToScreenPoint(this.transform.position);
            if (Screen.width > screenPos.x)
                this.transform.Translate(Vector3.left * Time.deltaTime * -m_nMoveSpeed);
            //向右转
            if (CurRotation > -RotateLimit)
                CurRotation -= RotateSpeed;
            TurnRight = true;
        }
        
        //回归
        if (!TurnLeft && !TurnRight)
        {
            if (CurRotation > 0.0)
                CurRotation -=RotateSpeed;
            else if (CurRotation < 0)
                CurRotation +=RotateSpeed;
        }
        
        
        
        
        Quaternion rot = Quaternion.AngleAxis(CurRotation, new Vector3(0, 0, 1));
        m_Plane.rotation = rot;
            
        //让相机和飞机一起以一定的速度前移
        this.transform.Translate(Vector3.forward * Time.deltaTime * m_nMoveSpeed);
        Camera.mainCamera.transform.Translate(Vector3.up * Time.deltaTime * m_nMoveSpeed);
    
    }

飞机的主要控制代码。。不知为什么，我的两个角度限制没有效果。。郁闷。。有空还看一下。。