[vtkusers] one actor to display multiple lines with different colors

[Marc Niethammer]

Hi,

I would like to display multiple lines (of possibly different
color) using just one actor. Furthermore I should be able to add
additional lines dynamically. I played around with the vtkUnstructuredGrid
data structure, but was never able to get multiple colors to work.

Does anyone know how to do this? (does anybody have a source code
example?)

Thanks for your help.

-- Marc