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<TITLE>Re: [Paraview] tube filter, surfaces aren't closed?</TITLE>
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<FONT FACE="Calibri, Verdana, Helvetica, Arial"><SPAN STYLE='font-size:11pt'>Looking at the mesa-artifacts-decomp.png image, it appears that you have many tubes that are coincident (or at least close to coincident). There might be z-buffer resolution problems. What happens if you run the geometry through D3?<BR>
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-Ken<BR>
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On 1/15/10 10:28 AM, "burlen" <<a href="burlen.loring@gmail.com">burlen.loring@gmail.com</a>> wrote:<BR>
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</SPAN></FONT><BLOCKQUOTE><FONT FACE="Calibri, Verdana, Helvetica, Arial"><SPAN STYLE='font-size:11pt'>FYI, I re-organized the images illustrating the bug, and made a<BR>
comparison of nvidia to mesa rendering on two cases 1) the artifacts 2)<BR>
the parallel inconsistency, and removed the older images.<BR>
<BR>
1)<BR>
<a href="http://nashi-submaster.ucsd.edu/movies/PV/tube-filter-artifact/mesa-artifacts.png">http://nashi-submaster.ucsd.edu/movies/PV/tube-filter-artifact/mesa-artifacts.png</a><BR>
<a href="http://nashi-submaster.ucsd.edu/movies/PV/tube-filter-artifact/nvidia-no-artifacts-decomp.png">http://nashi-submaster.ucsd.edu/movies/PV/tube-filter-artifact/nvidia-no-artifacts-decomp.png</a><BR>
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2)<BR>
<a href="http://nashi-submaster.ucsd.edu/movies/PV/tube-filter-artifact/mesa-artifacts-decomp.png">http://nashi-submaster.ucsd.edu/movies/PV/tube-filter-artifact/mesa-artifacts-decomp.png</a><BR>
<a href="http://nashi-submaster.ucsd.edu/movies/PV/tube-filter-artifact/nvidia-no-artifacts.png">http://nashi-submaster.ucsd.edu/movies/PV/tube-filter-artifact/nvidia-no-artifacts.png</a><BR>
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burlen wrote:<BR>
> So you are right these are artifacts not holes. Nasty looking ones at<BR>
> that. zooming in enough makes the artifacts receded toward the egdes<BR>
> of the tube. After some experimentation I'm finding that this has<BR>
> something to do with mesa. It is reproducible only when using mesa.<BR>
> Hardware rendering works fine, no artifacts.<BR>
><BR>
> There also looks to be two things going on, 1) the artifacts, 2)<BR>
> inconsistent selection of the visible faces on parallel runs. This is<BR>
> shown here:<BR>
> <a href="http://nashi-submaster.ucsd.edu/movies/PV/tube-filter-artifact/decomp-8-procs.png">http://nashi-submaster.ucsd.edu/movies/PV/tube-filter-artifact/decomp-8-procs.png</a><BR>
><BR>
><BR>
> I was using PV on this cluster fine back in dec to make very similar<BR>
> figures with stream tubes and didn't see any of these issues...<BR>
><BR>
> I added the dataset to reproduce to the bug report.<BR>
><BR>
> Moreland, Kenneth wrote:<BR>
>> It could be a rendering artifact. What happens when you zoom into<BR>
>> the problem area?<BR>
>><BR>
>> -Ken<BR>
>><BR>
>><BR>
>> On 1/14/10 12:24 AM, "burlen" <<a href="burlen.loring@gmail.com">burlen.loring@gmail.com</a>> wrote:<BR>
>><BR>
>> Any ideas as to why tubes from the tube filter aren't closed<BR>
>> surfaces<BR>
>> now? screenshot:<BR>
>> <a href="http://public.kitware.com/Bug/view.php?id=10139">http://public.kitware.com/Bug/view.php?id=10139</a><BR>
>><BR>
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>> **** Kenneth Moreland<BR>
>> *** Sandia National Laboratories<BR>
>> *********** *** *** *** email: <a href="kmorel@sandia.gov">kmorel@sandia.gov</a><BR>
>> ** *** ** phone: (505) 844-8919<BR>
>> *** web: <a href="http://www.cs.unm.edu/~kmorel">http://www.cs.unm.edu/~kmorel</a><BR>
>> <<a href="http://www.cs.unm.edu/%7Ekmorel">http://www.cs.unm.edu/%7Ekmorel</a>><BR>
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**** Kenneth Moreland<BR>
*** Sandia National Laboratories<BR>
*********** <BR>
*** *** *** email: <a href="kmorel@sandia.gov">kmorel@sandia.gov</a><BR>
** *** ** phone: (505) 844-8919<BR>
*** web: <a href="http://www.cs.unm.edu/~kmorel">http://www.cs.unm.edu/~kmorel</a><BR>
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