[Paraview] vtkPVPostFilter bug question

[Berk Geveci]

I suspect that something is wrong on your side. My reasoning:

- vtkPVPostFilter already copies all of the meta-data (whole extent and
extent translator) needed in the RequestInformation pass

- There should be no need to copy this meta-data in RequestData pass, which
is what CopyInformation() would do

- Everything else in ParaView seem to work fine with structured grids

Can you verify why the geometry filter is not displaying the data? Is
it because it
is missing whole extent? If that is the case, can one of your filters
be removing or
corrupting whole extent in RequestInformation? Or are you changing whole extent
in RequestData but not reporting it in RequestInformation?

-berk

On Mon, Jun 6, 2011 at 3:47 AM, Biddiscombe, John A. <biddisco at cscs.ch> wrote:
> Recently (3.10 onwards I think) a new filter was added to paraview which
> does some ‘conversion’ of inputs so that they can operate with filters that
> they would otherwise not do so.
>
>
>
> I am finding that some filters of mine which produce vtkStructuredGrid
> output, produce no visible output inn paraview and after some painful
> debugging have tracked it down to vtkPVPostFilter, specifically
>
>
>
> When vtkPVPostFilter is passind datasets directly from input to output
> without taking any action, it does a simple
>
>         output->ShallowCopy(input);
>
> I had to add
>
>         output->CopyInformation(input);
>
> in order for my datasets to become visible in the PV GUI.
>
>
>
> I believe that this is a bug in pvPostFilter, and I suspect it is new
> because the executive used to do a lot of the information copying without
> filters needing to do it.
>
>
>
> The odd thing is that some vtkStructuredGrid sources were still working
> without the extra information copy and so I’m not 100% sure it’s a bug (or
> some deficiency in the datasets).
>
>
>
> Can one of the kitware chaps comment on why I might have trouble with some
> filters, but not with others. The key part seems to be that the Extent
> information needs to be set in the information as well as the dataset and
> when doing a copyStructure, it isn’t passed through.
>
>
>
> JB
>
>
>
>
>
> --
>
> John Biddiscombe,                            email:biddisco @ cscs.ch
>
> http://www.cscs.ch/
>
> CSCS, Swiss National Supercomputing Centre  | Tel:  +41 (91) 610.82.07
>
> Via Cantonale, 6928 Manno, Switzerland      | Fax:  +41 (91) 610.82.82
>
>
>
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