[vtkusers] Visualisation of cell-based data.

[Bertwim van Beest]

Dear VTK community,

I have a problem in understanding how to visualise cell-valued data.
That is, I have a grid (either structured of unstructured) consisting of
cells defined by their vertices. Per cell I have one data value, which
is assumed to be constant over the volume of the cell (finite
difference/volume methods). 

How do I visualise this? VTK seems to be geared to vertex-based data
data values, but I can't imagine that VTK has not functionality to
tackle this!

Thanks in advance?