[vtkusers] vtkActor->GetPosition

[Mike Gagnon]

Hello vtk experts!

I have some code that draws the XYZ axis at the origin (0,0,0).  I draw 
them there and then never touch them, so they stay put.  I have a 
vtkActor that is initially placed at the origin as well.

Here's my question.  If I call vtkActor->SetUserMatrix to some matrix - 
I see that the actor moves far away from the origin (because I know my 
axes haven't moved), yet, when I execute the following code, it tells me 
the actor is still at the origin... I don't understand, I'm obviously 
missing something.

     double data[3];
     pActor->GetPosition(data);

Thanks for any help!
Mike