[vtkusers] Zoom in only one direction?

[da]

Hey folks,

I'm trying to implement a way so that I can scale / zoom the vtk render
window in only one direction. Instead of zooming in all three coordinates, I
would like to have the option of zooming in one direction. Looking at the
documentation, I haven't found any native support for this - except for
using vtkActors->SetScale(x,y,z). However, this only affects a single actor
and from http://www.vtk.org/pipermail/vtkusers/2006-September/087044.html it
seems to change the point data as well.

Is there a way to do this natively? If not, how should I implement it?

Thanks!
Da
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