animating large amount of cylindrical vectors

[pahsieh at usgs.gov]

> Well, I'm having problems with extracting extents.  When I extract
> some data using vtkStructuredGridGeometryFilter() and then try to
> display it, I only have points.  So, I thought to myself, why I need

I think the filter that you want is not vtkStructuredGridGeometryFilter,
but vtkExtractGrid.

Paul


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