[Paraview] question about integrate function(for Schlieren image)

[Andy Bauer]

Hi,

This is a fairly complex algorithm to do in parallel for general data sets.
For something like a vtkImageData or vtkRectilinearGrid though it should be
manageable. One option would be to use the Resample with Dataset filter to
project onto a vtkImageData if you have a vtkUnstructuredGrid or
vtkStructuredGrid and then do the integration in one direction. The
Integrate Variables filter always integrates over the entire data set.

Best,
Andy

On Wed, Dec 23, 2015 at 10:28 AM, 陈怡然 <cyrcyr123 at gmail.com> wrote:

> Dear Paraview group：
>
>         I'm a student who use paraview for openfoam data.
>         Now I'm dealing with a problem about 3D Schlieren image:
>         For 2D Schlieren image, it's easy just to use a partial derivative
> for the density, for 3D however,
> may need a integral function that integrate volume derivative data through
> one direction into a plane.
>
>         I found that the 'volume rendering' does the similar job, but I
> need to accumulate the data by the direction
> instead of accumulating the color. Also, I found a filter called
> 'integrate variables' yet I don't know how to use it or
> whether it can integrate all the volume into a plane.
>         Is there any kind of filter that I can use to get the results for
> the current version? or any suggestions on
> how I should manage to custom this filter?
>
>         I would be so pleased if I can have your reply.
>
> Best wishes!
>
> Yiran Chen
> Center for Combustion Energy
> Tsinghua Univerisity
>
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