[vtkusers] Using Volume Renderings Piecewise opacity function with vtkImageViewer2

[Andaharoo]

Currently I am using vtkImageViewer2 to display the slices of a volume. Works
alright but doesn't handle rotations all that well. Right now I want to
apply my transfer function used in volume rendering to these slices. To do
this I could simply give the vtkColorTransferFunction to the image actors
property and it would work like so:

imageViewer->GetImageActor()->GetProperty()->SetLookupTable(colorTransferFunction);

Now I'm looking to apply the opacity as well which is defined separately as
a vtkPiecewiseFunction. Is there an easier way to do this without manually
creating a lookup table from the two functions?



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