[vtkusers] how to prevent glyph from turning black when data value used to scale is negative

[Tracy Hu]

I noticed that if you scale and color a sphere glyph with a single scalar array which value 
ranges from negative to positive, then sphere scales with absolute value, but become black 
when value is negative. Is there a way to tell it not to turn black, but color with values?

Thanks

Tracy



      
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