[vtkusers] Help with vtkInterpolateDataSetAttributes

[Bill Lorensen]

Andrew, please post further comments to the mailing list.

On Mon, Dec 17, 2018, 2:07 PM Andrew E. Slaughter <andrew.slaughter at inl.gov
wrote:

> The interpolation for point data is working great, I am working on making
> my script more robust before posting by including cell and global data to
> the interpolation. I also am interpolating all active data into a
> vtkMultiBlockDataSetAlgorithm so the end product will behave similarly as a
> vtkExodusIIReader object.
>
> Anyway, I can't get the cell data to interpolate. The point data is
> working fine (change the variable to 'point') to show this result.
>
> I was hoping you could take a look and see what I am missing, I images it
> is something to do with the vtkPointInterpolator, but I can't seem to find
> the solution.
>
> Thanks,
> Andrew
>
>
> On 12/10/18, 8:46 AM, "Andrew E. Slaughter" <andrew.slaughter at inl.gov>
> wrote:
>
>     Feel free to add this an example with the data, when I get the python
> version fixed up I will add it to the examples wiki as well.
>
>     Thank you for your help.
>
>     - Andrew
>
>     On 12/5/18, 5:20 PM, "Bill Lorensen" <bill.lorensen at gmail.com> wrote:
>
>         I found the problems with your script.
>
>         vtkPointInterpolator: The point arrays will not be interpolated
> unless
>         PassPointArrays is off. And the source and input data must add the
>         field data as the active scalar.
>         vtkInterpolateDataSetAttibutes does not interpolate field data. To
>         interpolate field data each input must add the field data as the
>         active scalar.
>
>         Neither of these are obvious. I have attached a c++ example that is
>         based on your script. I changed a lot of the names to help me debug
>         the problems.
>
>         I would like to ass this c++ code as an example, once I make a few
>         more changes. Is that OK with you? I would also need to add your
>         datasets.
>
>         Bill
>         On Tue, Dec 4, 2018 at 3:40 PM Andrew E. Slaughter
>         <andrew.slaughter at inl.gov> wrote:
>         >
>         > Thank you, feel free to email me directly if you need anything
> more from my end.
>         >
>         >
>         >
>         > From: Bill Lorensen <bill.lorensen at gmail.com>
>         > Date: Monday, December 3, 2018 at 7:20 PM
>         > To: "Andrew E. Slaughter" <andrew.slaughter at inl.gov>
>         > Cc: VTK Users <vtkusers at vtk.org>
>         > Subject: Re: [vtkusers] Help with vtkInterpolateDataSetAttributes
>         >
>         >
>         >
>         > I suspect that vtkInterpolateDataSetAttributes may be buggy. The
> are no tests that interpolate scalar data. I'm looking into it.
>         >
>         >
>         >
>         > On Thu, Nov 29, 2018, 8:13 AM Andrew E. Slaughter via vtkusers <
> vtkusers at public.kitware.com wrote:
>         >
>         > I am attempting to interpolate between two ExodusII
> (vtkExodusIIReader) results using the vtkInterpolateDataSetAttributes, but
> am having trouble getting it to work. I was able to perform an
> interpolation that mimics the behavior with calls to
> vtkAbstractArray::InterpolateTuple, but this doesn’t seem like the correct
> solution.
>         >
>         >
>         >
>         > I have attached a script that show what I am trying to do,
> including what is working and what is not. I know that for this problem I
> could use vtkTemporalInterpolator, but for the actual problem I am trying
> to solve it isn’t appropriate. I am using python bindings with VTK7.1 on
> MacOS.
>         >
>         >
>         >
>         > I would appreciate any help I can get making this work.
>         >
>         >
>         >
>         > Thanks,
>         >
>         > Andrew
>         >
>         >
>         >
>         >
>         >
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