[vtkusers] vtkExtractGeometry problems on large cell sets

[Laurence Griffiths]

Hi All,
I'm using vtkExtractGeometry on a large ensight dataset
(vtkUnstructuredGrid - 60 million cells, approximately).

ExtractData=vtk.vtkExtractGeometry()
ExtractData.SetInput(MultiBlock.GetOutput().GetBlock(0))
ExtractData.SetImplicitFunction(ClipBox)
ExtractData.ExtractInsideOn()
ExtractData.ExtractBoundaryCellsOn()
ExtractData.Update()

ClipBox is an instance of vtk.vtkBox()

On small datasets it works fine, however on large datasets I seem to get
Bands of cells missing internally in the dataset. (seen by by saving the
volume, opening in paraview, and taking a slice).

If i take a slice of the raw dataset (i.e. the vtkUnstructuredGrid) before
passing to vtkExtractGeometry - I have no internal cells missing

If i take a slice in vtk, I get a repeatable Bad Alloc error.

Anyone else had simillar problems to this? Or Know a work around?

Cheers,
Laurence.
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