[Paraview] Normal Glyphs and Cullbackface give different results

[Michael Jackson]

I was checking some results on a triangular surface mesh that was  
generated through an external program and I have some conflicting  
results. If I use the "Backface Style" section of the "Display" tab to  
set the Backface Representation to "Cull Backface" I see some of the  
triangles disappear which is to be expected if the surface meshing  
program did not correctly "wind" the triangles. I then applied the  
"Normal Glyph" filter and I would have expected to see some arrows  
pointing at me and some away but they are all in the same direction.  
See attached image.
   My question is this expected? Does the Normal Glyph use the same  
algorithm as the CullbackFace? I'll assume that the CullBackface is  
just an OpenGL setting so ParaView really has no control over that.

  Or maybe I am just really misunderstanding what is going on. Any  
comments or clarifications would be greatly appreciated.

___________________________________________________________
Mike Jackson                      www.bluequartz.net
Principal Software Engineer       mike.jackson at bluequartz.net
BlueQuartz Software               Dayton, Ohio


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