[vtkusers] altering the normals
prabhu at aero.iitm.ernet.in
Sat Jun 22 12:03:52 EDT 2002
>>>>> "Mepisto" == mepisto <mepisto at hotmail.com> writes:
Mepisto> hi all, I m trying to simulate bump mapping on a sphere
Mepisto> by changing the normals in a random manner. I actually
Mepisto> make a vtkFloatArray with random numbers and copy that
Mepisto> array with the SetNormals to a vtkPointData of the
Mepisto> sphere. The methode doesnt work. What I m I doing wrong?
Setting the normals wont do the job. You need to warp the existing
polydata. I'd suggest that you add your random bump values as a
vector and then use the vtkWarpVector class to warp the polydata using
the vectors at each point.
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