All, I'm sure I'm missing something here, so please knock me up alongside the head and point it out.
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: Generate surface normal - this is greyed out (wants poly data?) Delaunay 3D on this to generate poly data, which I could then hopefully run Generate surface normal on, but it was still greyed 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. PointDataToCellData to get GlyphVector for each Cell Python Calculator and ask for area(inputs) the Polygon elements all get an Area of -1 Calculator to get Area_X as product of GlyphVector_X and Area Threshold on Area_X > 0 - don't want negative areas or some boundary cells with GlyphVector_X as negative Python Calculator to get sum(Area_X) This number appears to be about half of my expected number 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????? Alternatively, anyone got an easier way to skin this cat? Thanks for any hints you may have. Dennis
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