Unity 鍵盤鼠標操作控制物體

void Update()
    {
        //左Ctrl鍵
        if (Input.GetKey(KeyCode.LeftControl))
        {
            B_LeftCtrl = true;
        }
        else
        {
            B_LeftCtrl = false;
        }

        if (Input.GetMouseButton(0) && B_LeftCtrl)//鼠標左鍵+左Ctrl
        {
            float mouseX = Input.GetAxis("Mouse X");//獲取鼠標X軸滑動參數
            float mouseY = Input.GetAxis("Mouse Y");//獲取鼠標Y軸滑動參數
            //鼠標XY軸滑動控制物體旋轉
            GameObject.Find("地形").transform.Rotate(new Vector3(mouseY * Time.deltaTime * rotateSpeed, -mouseX * Time.deltaTime * rotateSpeed));
        } 

        if (Input.GetMouseButton(1) && B_LeftCtrl)//鼠標右鍵+左Ctrl
        {  
            float mouseX = Input.GetAxis("Mouse X");//獲取鼠標X軸滑動參數
            float mouseY = Input.GetAxis("Mouse Y");//獲取鼠標Y軸滑動參數  
             
            GameObject.Find("地形").transform.Translate(new Vector3(mouseX * Time.deltaTime * moveSpeed,mouseY * Time.deltaTime * moveSpeed,0));
        }

        if (B_LeftCtrl)//左Ctrl鍵
        {
            //W、A、S、D 控制移動
            float horizontal = Input.GetAxis("Horizontal"); //獲取橫軸參數。 
            float vertical = Input.GetAxis("Vertical"); //獲取垂直參數。  

            GameObject.Find("地形").transform.Translate(new Vector3(horizontal * Time.deltaTime * moveSpeed, 0, vertical * Time.deltaTime * moveSpeed));

            //鼠標中鍵控制物體滾軸縮放
            float mouseScrollWheel = Input.GetAxis("Mouse ScrollWheel");  
            GameObject.Find("地形").transform.localScale += new Vector3(mouseScrollWheel, mouseScrollWheel, mouseScrollWheel);
        }
    }