[vtkusers] LookupTable with (x,y,z)

[patgo at sapo.pt]

	Hello,

	I plotted a set of points (x,y,z) and used the 2D Delaunay
triangulation to make a surface graphic. This worked just fine! Now I
want the graphic to apear in different colors, acordding to the zz
coordinate. I built a LookupTable but it doesn't work. Why?

	All the vtkLookupTable examples use previously built files with data
so they're not helping me...

	Does anybody know how I can do this?

	Thanks,
Patrícia Gonçalves
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