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<p class="MsoNormal">Ken,<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Thanks for that wake-up! I guess loading “Surface_1000” had me thinking I already had a “Surface”, but Exodus “surface” and Paraview “surface” are not the same. <o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">With right thinking this was easy this morning.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Thanks again!<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Dennis<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal"><b>From:</b> Moreland, Kenneth [mailto:kmorel@sandia.gov] <br>
<b>Sent:</b> Monday, April 09, 2018 7:11 PM<br>
<b>To:</b> Dennis Conklin <dennis_conklin@goodyear.com>; Paraview (paraview@paraview.org) <paraview@paraview.org><br>
<b>Subject:</b> [EXT] RE: [Paraview] Normal vector to Exodus Sideset elements<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal"> <strong><span style="font-family:"Calibri",sans-serif;color:red">WARNING - External email; exercise caution.</span></strong><o:p></o:p></p>
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<p class="MsoNormal">Dennis,<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Yes, this cat has a zipper that allows it’s skin to come right off. (Maybe I took that “skin the cat” metaphor a bit too far.)<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Anyway, just run the Extract Surface filter. After that you can run the Generate Surface Normals filter.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">-Ken<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal"><b>From:</b> ParaView [<a href="mailto:paraview-bounces@public.kitware.com">mailto:paraview-bounces@public.kitware.com</a>]
<b>On Behalf Of </b>Dennis Conklin<br>
<b>Sent:</b> Monday, April 9, 2018 1:22 PM<br>
<b>To:</b> Paraview (<a href="mailto:paraview@paraview.org">paraview@paraview.org</a>) <<a href="mailto:paraview@paraview.org">paraview@paraview.org</a>><br>
<b>Subject:</b> [EXTERNAL] [Paraview] Normal vector to Exodus Sideset elements<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">All,<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">I’m sure I’m missing something here, so please knock me up alongside the head and point it out.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">I load a sideset (surface) from an Exodus file. I end up with a bunch of quads that Paraview conveniently created for me from the surface. I need to calculate a Normal vector for each of these quads. I have tried:<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Generate surface normal – this is greyed out (wants poly data?)<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Delaunay 3D on this to generate poly data, which I could then hopefully run Generate surface normal on, but it was still greyed<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Tried Normal Glyphs which gave me point Normal vectors but gave me a bunch of Triangle and Polygon elements – I’m not sure what’s going on here.<o:p></o:p></p>
<p class="MsoNormal"> PointDataToCellData to get GlyphVector for each Cell <o:p>
</o:p></p>
<p class="MsoNormal"> Python Calculator and ask for area(inputs[0]) the Polygon elements all get an Area of -1<o:p></o:p></p>
<p class="MsoNormal"> Calculator to get Area_X as product of GlyphVector_X and Area<o:p></o:p></p>
<p class="MsoNormal"> Threshold on Area_X > 0 - don’t want negative areas or some boundary cells with GlyphVector_X as negative<o:p></o:p></p>
<p class="MsoNormal"> Python Calculator to get sum(Area_X)<o:p></o:p></p>
<p class="MsoNormal"> This number appears to be about half of my expected number<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">These must be an easier way. I’m not a vtk guru. When I first load my surface, is there some vtk routine I could call within a Programmable filter to get the cell normal?????
<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Alternatively, anyone got an easier way to skin this cat?<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Thanks for any hints you may have.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Dennis<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
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