public void PrepareRenderItem(StorageBlock block)
{
var vp = _realVpGenerator.Next(block);
_dispatcher.BeginInvoke(
(GetRenderingItemDelegate)((viewport) => {
_item = _pool.GetNextRenderingRealPointItem();
_item.RealViewport = viewport;
_item.BeginRenderRealData();
_isCreated.Set();
}),
vp
);
}
