[vtkusers] (no subject)

[Julian Yu-Chung Chen]

Hi all,

I've got a data using dataset: StructuredPoints(with z_dimension 1) 
with attribute data: scalars. And I will make it warp according to the 
the scalar value, then making a surface in VTK. The pipeline is pretty 
much like this:

vtkStructuredPoints(set with vtkDoubleArray in points being get) -> 
vtkWarpScalar -> Mapper -> Actor

And now here's the question, some grid points in the dataset, have no 
scalar values at all. I would call it undefined. But using the pipeline 
mentioned above, the scalars not assigned with be filled with zeros, 
then the final visualization will reflect as the number implies. Can I 
make those grid point with undefined scalars, being left with 'holes' 
in the final warped visualization? Or maybe any alternative pipeline 
arrangements suggested?

Thanks in advance!

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