public void HandleTwoTouch(Touch touch1, Touch touch2)
{
curRotFsm.Advance(eCameraOpTansition.ROT_RESET);
curPivotFsm.Advance(eCameraOpTansition.PIVOT_RESET);
// if at least one of them moved
if (touch1.phase == TouchPhase.Moved || touch2.phase == TouchPhase.Moved)
{
zoomInfo.SetTouch(touch1, touch2);
curZoomFsm.Advance(eCameraOpTansition.ZOOM_RUN);
}
}