[vtkusers] Extracting component of vector field and exporting subset of arrays

[David E DeMarle]

1) Try "U.iHat" instead of "U.ihat"
2) Use a vtkPassArrays filter just before your writer to decide which
arrays to keep/remove.

David E DeMarle
Kitware, Inc.
R&D Engineer
21 Corporate Drive
Clifton Park, NY 12065-8662
Phone: 518-881-4909


On Tue, Jul 24, 2012 at 5:13 AM, peterm <madapeti at gmail.com> wrote:
> Dear Forum members,
>
> I have a structured grid dataset with multiple point data arrays, a set of
> scalar fields and a vector field.
> I would like to achieve two goals:
>   1.) create a scalar field data array as a component of the vector field
>   2.) save the dataset into a file however only exporting a subset of the
> available arrays
>
> To be more specific I have data in this format from a CFD solver, and I need
> to export a scalar field and the three components of the vector field into
> MHD (single component) files.
>
> I would appreciate any help regarding the question.
>
> I am not very familiar with VTK, however I believe using vtkArrayCalculator
> may be a solution to 1.). I have tried to create the vector field component
> field using it, however it does not work. I used the following function
> "U.ihat" (dot product of vector field with the coordinate vector), however
> running the filter yields " An error occured when parsing the calculator's
> function. See previous errors."
>
> Thanks a lot,
> Peter
>
>
>
> --
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