[vtkusers] Groups of Cells Using Unstructured Grid for FEM

[Kevin Maxwell]

I am trying to use VTK unstructured grids to visualize finite element 
meshes and contour data.  Has anyone found a way to separate cells into 
different groups (i.e. cells with different material properties)?  I 
found this type of question posted several times in the archives, but 
the responses haven't helped me much.  I could use cell data to give 
cells different values based on material properties, but this does not 
solve the problem of having discontinuous scalar point data at the 
boundaries between elements of different materials.  Any advice would be 
appreciated.

Thanks,
Kevin Maxwell