public void AsyncBuild()
{
if (!IsBuildFinished() && m_event != null)
{
// already start building
return;
}
if (m_event == null)
{
m_event = new ManualResetEvent(false);
}
m_event.Reset();
PrepareForBuild();
ThreadPool.InitInstance();
ThreadPool.QueueUserWorkItem(arg => ((MeshTreeBase)arg).BuildStart(), this);
}