GetCameraControlTranslation.cs

 private Vector3 GetCameraControlTranslation()
    {
        InputDev inputDev = InputDev.Instance;

        Vector3 deltaPosition = Vector3.zero;
        //deltaPosition += GetKeyDir("left", "right") * Camera.main.transform.right; //ここをコメントアウトする
       //deltaPosition += GetKeyDir("down", "up") * Camera.main.transform.forward;   //ここをコメントアウトする

        // Support fly up/down keypresses if the current project maps it. This isn't a standard
        // Unity InputManager mapping, so it has to gracefully fail if unavailable.
        if (this.isFlyKeypressEnabled)
        {
            try
            {
                deltaPosition += InputCurve(Input.GetAxis("Fly")) * m_Veil.transform.up;
            }
            catch (System.Exception)
            {
                this.isFlyKeypressEnabled = false;
            }
        }

        // All input should come through inputDev, someday
        deltaPosition += InputCurve(inputDev.VirtualCamTranslate.delta.x) * this.transform.right;
        deltaPosition += InputCurve(inputDev.VirtualCamTranslate.delta.y) * this.transform.forward;
        deltaPosition += InputCurve(inputDev.VirtualCamVertAndRoll.delta.x) * this.transform.up;

        float accel = Input.GetKey(KeyCode.LeftShift) ? 1.0f : 0.1f;
        return accel * deltaPosition;
    }