private void Start()
{
m_input.AddMouseButtonDownCallback(EPlayerInputMouseButttonType.Left, FinishCreate);
m_input.AddMouseButtonDownCallback(EPlayerInputMouseButttonType.Right, CancelCreate);
m_input.AddKeyDownCallback(KeyCode.R, RotateObject);
m_gridManager = GameObject.FindGameObjectWithTag("GameController").GetComponent <GridManager>();
}