[vtkusers] How to map 2 scalar attributes simultaneously?

[Immo Trinks]

Hi,

I have VTK point data (1500 points) with two attributes (scalar1 and scalar2) 
assigned to each data point.

I would like to display the points as spheres that are coloured relative to 
scalar1. At the same time, only those spheres shall be visible for which 
scalar2 is within a given scalar range. How can this be done?

Thank you for any help!
Immo