[Paraview] Displaying an unstructured grid of tetrahedra

[Eric E. Monson]

Hey Mike,

Yes, it's a standard ParaView thing that the interior nodes are left out for rendering efficiency. You can see this more dramatically if you generate a Wavelet Source and view it in Points representation – it only shows the surface vertices. Now with your data or this ImageData, apply a 2D vertex glyph and you'll see all the interior nodes. Or, apply the Extract Edges filter to view the interior edges.

-Eric

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Eric E Monson
Duke Visualization Technology Group


On Oct 12, 2011, at 9:49 AM, Michael Jackson wrote:

> I am trying to visualize the output from some volume meshing code. The output is a bunch of Tetrahedra. When I load the file in paraview (3.12.0rc2) I see the surface just fine but I do not "see" any thing connected to the single interior node. I have checked the file by hand using pencil and paper and the file seems to be formed correctly. When ParaView is viewing a dataset in "Surface mode" does it leave out the interior nodes or am I just missing something basic? Here is the data file:
> 
> # vtk DataFile Version 2.0
> Generated Volume Mesh
> ASCII
> DATASET UNSTRUCTURED_GRID
> POINTS 10 float
> 0 0 1
> 1 0 1
> 1 0 0
> 0 0 0
> 0 1 1
> 1 1 1
> 1 1 0
> 0 1 0
> 0.5 1.5 0.5
> 0.5625 0.6875 0.5625
> CELLS 13 65
> 4 7 9 8 6
> 4 6 9 8 5
> 4 5 9 8 4
> 4 5 9 4 0
> 4 4 9 8 7
> 4 6 9 5 2
> 4 4 9 7 0
> 4 7 9 6 2
> 4 2 9 5 1
> 4 1 0 5 9
> 4 0 1 2 9
> 4 2 9 0 7
> 4 0 3 2 7
> CELL_TYPES 13
> 10 10 10 10 10 10 10 10 10 10 10 10 10 
> 
> 
> Thanks
> ___________________________________________________________
> Mike Jackson                    Principal Software Engineer
> BlueQuartz Software                            Dayton, Ohio
> mike.jackson at bluequartz.net              www.bluequartz.net
> 
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