[Paraview] VTK Lookup tables

[Christoph Moder]

Hi Craig!

As far as I know, the lookup table is only mapped to data values between 
0 and 1. So if you create a table with, say, 3 entries:

LOOKUP_TABLE france 3
0.000000  0.000000  1.000000  1.000000
1.000000  1.000000  1.000000  1.000000
1.000000  0.000000  0.000000  1.000000

Then data values between 0 and 0.33 are displayed in blue, 0.33–0.66 in 
white and 0.66–1 in red.

Christoph