[vtkusers] vtkDataSetSurfaceFilter does not work properly on quadratic tet meshes

[Dominik Szczerba]

Many thanks for a quick reply!
Is there a way to preserve the original point and cell Ids like in the 
vtkDataSetSurfaceFilter?
Dominik

Francois Bertel pisze:
> Hello,
> 
> The output of a vtkDataSetSurfaceFilter is a vtkPolyData. vtkPolyData
> can only have linear 0-D,1-D,2-D linear cells.
> 
> The only kind of dataset that can host a quadratic cells is a
> vtkUnstructuredGrid.
> 
> Use vtkUnstructuredGridGeometryFilter to extract the surface of a
> vtkUnstructuredGrid will preserving the quadratic property of the
> cell. The output of this filter is a  vtkUnstructuredGrid.
> 
> Regards.
> 
> On Sun, Oct 11, 2009 at 8:18 PM, Dominik Szczerba <dominik at itis.ethz.ch> wrote:
>> 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
>> _______________________________________________
>> Powered by www.kitware.com
>>
>> Visit other Kitware open-source projects at
>> http://www.kitware.com/opensource/opensource.html
>>
>> Please keep messages on-topic and check the VTK FAQ at:
>> http://www.vtk.org/Wiki/VTK_FAQ
>>
>> Follow this link to subscribe/unsubscribe:
>> http://www.vtk.org/mailman/listinfo/vtkusers
>>
> 
> 
>