[vtkusers] Smoothing a vector field

[Sunrise]

Hello,

I have a structured points dataset, which it has a vector field assigned
to its point data. I want to smooth the vector field. What is the best
way to do that?

I guess I should decompose the vector field to three vtkDoubleArrays for
each component, and add it into the dataset and apply the filter to
three arrays. Which filter should I apply? And is there a better way?

Thanks,
-Sia
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