[vtkusers] assign different colors to cells in vtk unstructured grid

[sepideh20]

Hello all, 

Actually I have built an unstructured grid including several cells (each
cell is a hexahedron). Now I want to assign different colors to each of
these cells. I do not know how I should do that. 

Please kindly help me with any idea or any sample code. 

Many many thanks in advance.



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