[vtkusers] ImageViewer2 Usage

[David Doria]

There seems to be significant confusion about when and how to use
vtkImageViewer2.

This code seems to compile and run:
http://www.vtk.org/Wiki/VTK/Examples/ImageViewer2

but it seems to allow the image to be manipulated as a 3D plane (which
I can't image anyone would expect). The documentation says that it
uses vtkInteractorStyleImage, so I was expecting to work more like
this:

http://www.vtk.org/Wiki/VTK/Examples/InteractWithImage

Can someone put an end to this confusion by explaining the differences
between these two techniques?

Thanks,

David