[vtkusers] Assigning colors to scalars

[Lise Angell]

Dear vtk-users,

I'm working with a 3D dataset containing a heart model. This model is
read into vtk as an UnstructuredGrid with a scalar value in each
point.
I would like to color the model according to these scalars. I've tried
vtkLookupTable, setting the table range to the min and max value of
the scalar values, but the model still turns out all red...

This is (parts of) my code, I would be grateful for any advise:


# scalar_range contains min and max value in the unstructured grid u_field
lut = vtk.vtkLookupTable()
lut.SetNumberOfColors(10)
lut.SetTableRange(scalar_range[0], scalar_range[1])
lut.SetHueRange(0.0, 0.3)
lut.Build()

mapper = vtk.vtkDataSetMapper()
mapper.SetInput(u_field)
mapper.SetLookupTable(lut)



Best regards,
Lise

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"Je forme une entreprise qui n'eut jamais d'exemple,
et dont l'exécution n'aura point d'imitateur."  J-J Rousseau