[vtkusers] Converting from rectilinear to polydata

[ThinkFlow]

Hi,

I am trying to convert a vtkrectilineargrid to a vtkpolydata. I am doing
this by first converting from vtkrectilineargrid to an unstructured grid
(with tetrahedra) by using vtkRectilinearGridToTetrahedra, and then
converting the unstructured grid to polydata by using
vtkDataSetSurfaceFilter . However, when I try to render the polydata, I get
an error saying that 

vtkWindowedSincPolyDataFilter (0x143aaf0): No data to smooth!
 
My code for the two conversions are basically modified versions of
http://tinyurl.com/kbu8dh5 and http://tinyurl.com/lzlnurs , and are
attached.

DataSetSurfaceFilter.cxx
<http://vtk.1045678.n5.nabble.com/file/n5722972/DataSetSurfaceFilter.cxx>  
RectilinearGridToTetrahedra.cxx
<http://vtk.1045678.n5.nabble.com/file/n5722972/RectilinearGridToTetrahedra.cxx>  

Thanks,

Naoki



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