[vtkusers] updated image from vtkImagePlaneWidget

[David Gillard]

Hi,

I've got an orthogonal rendering of some 3D data with 3 
vtkImagePlaneWidgets. I'd like to be able to display each plane as a 
separate 2D image which would get updated as the corresponding plane 
widget is altered (if the slice index is changed, for instance).

Any idea how I'd go about doing this?

Help is greatly appreciated, as always.