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Maybe some visualization might help to illustrate the problem. This is what the domain decomposition looks like for two domains:
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<div class="">There are only two domains with values 0 and 1, respectively. I then select & apply the “Cell Data to Point Data” filter, then the “Contour” filter with only one isosurface set to “0.5”. However, in this example, the result is a blank screen,
i.e., no visible output from the Contour filter.</div>
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<div class="">In another example, I get the following result:</div>
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<div class="">The sharp, colored interfaces of the integer array in the back is clearly visible. In this case, there are 5 domains (values [0,4]) and I used 0.5, …, 3.5 as the isosurface values in the contour filter. While in this case I actually get an output
(white lines), they follow the fuzzy output of “Cell Data to Point Data” and I am not able to reconstruct the sharp interfaces.</div>
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<div class="">To conclude, my problems are actually twofold: I would like to find out how to restore sharp contours, and - if that does not work - at least how to make this approach work for all datasets I am looking at.</div>
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<div class="">Again, thanks a lot in advance, and please excuse my double posting...</div>
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<div class="">Michael</div>
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<div class="">On 11 Jul 2016, at 12:16 , Schlottke-Lakemper, Michael <<a href="mailto:m.schlottke-lakemper@aia.rwth-aachen.de" class="">m.schlottke-lakemper@aia.rwth-aachen.de</a>> wrote:</div>
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Hi folks,
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<div class="">I would like to visualize an integer array of an unstructured dataset based on voxels, which contains MPI rank ids generated by a filter we use. To achieve this, I plan to somehow extract the “sharp” interfaces, similar to what the contour filter
does, to obtain a visual representation of the domain decomposition. However, for the contour filter, I first have to call “Cell data to point data”, which smears out the previously sharp interfaces and causes connectivity problems of the resulting contours,
as in some areas the domain decomposition features are very small.</div>
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<div class="">Is there another way how I could extract these contours? Please note that I am not using vtkProcessId but rather an own integer array.</div>
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<div class="">Thanks a lot in advance</div>
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<div class="">Michael</div>
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--<br class="">
Michael Schlottke-Lakemper<br class="">
<br class="">
Institute of Aerodynamics and Chair of Fluid Mechanics<br class="">
RWTH Aachen University<br class="">
Wüllnerstraße 5a<br class="">
52062 Aachen<br class="">
Germany<br class="">
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Phone: +49 (241) 80 95188<br class="">
Fax: +49 (241) 80 92257<br class="">
Mail: <a href="mailto:m.schlottke-lakemper@aia.rwth-aachen.de" class="">m.schlottke-lakemper@aia.rwth-aachen.de</a><br class="">
Web: <a href="http://www.aia.rwth-aachen.de/" class="">http://www.aia.rwth-aachen.de</a></div>
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