[Paraview] How to stop ParaView from triangulating imported cells

[Pieter Barendrecht]

Hi Utkarsh,

You're absolutely right. I was told that the script used to create these .vtu files always uses vtkQuad elements, but it turns out that it actually uses vtkTetra elements in some cases. Thanks!

Best,
Pieter


On Wed, 24 Jul 2013 22:46:25 -0400
Utkarsh Ayachit <utkarsh.ayachit at kitware.com> wrote:

> Pieter,
> 
> The file you sent has 20 tets (not quads) and hence I see the
> surface-triangles. Or am I missing something here? Try opening the
> spreadsheet view then switch it to show cells. Each of the cells is a
> tetrahedron.
> 
> Utkarsh
> 
> On Thu, Jul 18, 2013 at 1:17 PM, Pieter Barendrecht
> <p.j.barendrecht at student.tue.nl> wrote:
> > Hi,
> >
> > I'm wondering how to prevent ParaView from (visually) triangulating the imported cells. To illustrate the problem, I attached a minimal example (2.3 kB) to this email. It contains a heavily discretized version of a parametric surface, consisting of 20 cells (quads).
> >
> > These quads are in fact non-planar, so I understand why ParaView triangulates them for plotting purposes. However, when I export the scene as an .x3d file, it actually exports the triangles instead of the quads.
> >
> > Two questions:
> > - Is it possible to display the edges of the actual cells (i.e. the quads) in ParaView (i.e. in 'WireFrame' mode or in 'Surface with Edges' mode)
> > - Is it possible to export the actual cells instead of these triangles
> >
> > Best regards,
> > Pieter
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