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

[陈怡然]

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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