[vtkusers] Applying Filter to MultiBlockDataset

[Berk Geveci]

As long as all algorithms use vtkCompositeDataPipeline as the
executive, you are fine. The executive will loop over all the
leaf-nodes (vtkDataSet sub-classes) and call the filter on each. You
can make sure that all algorithms use vtkCompositeDataPipeline using
vtkAlgorithm::SetDefaultExecutive(). Ah, you have to make sure that at
the end of the pipeline you have the right consumer. Either a
multi-block mapper or a geometry filter that can produce a single
polydata.

-berk

On Mon, Mar 24, 2008 at 6:13 PM, Mike Jackson <imikejackson at gmail.com> wrote:
> I am applying a custom filter to a multiblock data set. Everything
>  _seems_ to work and render fine but I have a question about all this.
>  My custom filter takes a "vtkUnstructuredGrid" as an input. The data
>  is coming from a custom reader that is based on the
>  MultiBlockAlgorithm and has 2 "Blocks" of data. Each block happens to
>  a "vtkUnstructuredGrid" data object. So am I just getting lucky in
>  this respect or should I be specifying something else in either the
>  filter or the reader? Or is the filter being applied to _each_ block
>  from the MultiBlock Data set?
>
>  Thanks for any clarification
>  --
>  Mike Jackson
>  imikejackson & gmail * com
>
>
>
>
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