[vtkusers] vtkContourFilter not reporting progress

[Giuseppe D'Angelo]

Hello,

I'm using a vtkContourFilter on a 3D floating point vtkImageData to 
create an isocontour. I installed an observer on the filter for the 
ProgressEvent. The problem is that the filter doesn't seem to report a 
useful progress -- it simply jumps from 0% to 100%.

Digging into the filter's code seems to show that the filter calculation 
is delegated to the SynchronizedTemplates3D subobject, which in turn 
seems to report an useful progress; however, this progress is not 
getting "forwarded" to the vtkContourFilter.

Am I doing something wrong or this is the expected behaviour?

Thanks,
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Giuseppe D'Angelo | giuseppe.dangelo at kdab.com | Software Engineer
KDAB (UK) Ltd., a KDAB Group company
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