[vtkusers] vtkExtractionSelection update when input is modified?

[mputtke]

Hello folks,

i have a vtkUnstructuredGrid connected to a vtkExtractionSelection as input.
It works fine, but now i want it to run automatically when the input alters.
So i alter the input grid and call Modified() on it.

In my unterstanding this should be enough to make the vtkExtractionSelection
run again, but it seems not. i have to call Update() on the
vtkExtractionSelection manually for that.

Some code excerpt:


Without the vtkExtractionSelection calling Modified() on the
vtkUnstructuredGrid or even on the Scalars vtkDoubleArray is enough to
update the visualization.

Did i missunderstand something and it behaves like intended, did i do
something wrong or is it bug in vtk?
I am using vtk 6.1.0.

Thanks
Martin 



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