public void ChangeState(State <T> newState)
{
if (m_pCurrentState != null)
{
Log.Print("entity:{0} [{1}]->[{2}]", m_entity.GetID(), m_pCurrentState?.GetName(), newState.GetName());
m_pPreState = m_pCurrentState;
m_pCurrentState.Exit(m_entity);
m_pCurrentState = newState;
m_pCurrentState.Enter(m_entity);
}
}