public void AddObject(string ModelName, string type = "")
{
EngineObject n_obj;
if (type == "")
{
n_obj = _engineObject.AddObject(ModelName);
}
else
{
n_obj = _engineObject.AddObject(ModelName, type);
}
var e_obj = new EngineObjectViewModel(n_obj, this);
_children.Add(e_obj);
this.IsExpanded = true;
e_obj.IsSelected = true;
}