[vtkusers] vtkDataSetSurfaceFilter does not work properly onquadratic tet meshes

[John Platt]

Hi Dominik,

You may like to try vtkUnstructuredGridSurfaceFilter (attached). Note that 
ComputeInputUpdateExtents() is not implemented (because I am not sure how 
to!).

This filter is needed if you want to show surface edges of quadratic cells 
without all the internal triangulation. I would be very pleased if it could 
be added to VTK.

John.

----- Original Message ----- 
From: "Dominik Szczerba" <dominik at itis.ethz.ch>
To: "VTK users group" <vtkusers at vtk.org>
Sent: Monday, October 12, 2009 1:18 AM
Subject: [vtkusers] vtkDataSetSurfaceFilter does not work properly 
onquadratic tet meshes


> Hi,
>
> Is there any reason vtkDataSetSurfaceFilter returns a linear triangle mesh 
> from a quadratic tet mesh (by just breaking each quadratic element into 
> several linear ones)? Is there a way in VTK to make the surface also 
> quadratic?
>
> thanks,
> Dominik
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