[Paraview] Color By Vector with vtkPolyData

[Mike Jackson]

I have a custom filter where I generate a vtkPolyData object as  
output. As part of the filter I create a vtkUnsignedCharArray and  
attach that to the cell data as a Vector.

output->GetCellData()->SetVectors(slipColors);
output->GetCellData()->SetActiveVectors(
       Dislocation::SlipSystemColor.c_str() );

There are also 2 other arrays (vtkDoubleArray, each with 3  
components) attached to the Cell Data that get passed through during  
the filter.

When I run the filter in ParaView, the "Color By" drop down menu does  
not show my Cell based attributes? Am I simply missing something? Or  
is this not possible with vtkPolyData?

An earlier version of the filter generated a vtkUnstructuredGrid as  
an output and the "Color By" drop down menu would show the vectors  
from the cell data.

If it helps, I am generating vtk_lines as my cell type.

Thanks for any help.
--
Mike Jackson
imikejackson & gmail * com