[vtkusers] Color by curvature in python

[Pappu Kumar]

I am trying to color a set of (x,y,z) coordinates by curvature. My code so far is as follows:
from pylab import randn

#generate data
data=randn(300).reshape(3,100)

#x,y,z coordinates
x=data[0:1]
y=data[1:2]
z=data[2:3]

Now I want to calculate the curvature at each point using vtk. However I could not understand how to do it even by reading this example:

http://www.cmake.org/Wiki/VTK/Examples/Python/CurvaturesDemo

Thank you very much for your kind help.
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