[vtkusers] display oriented points?

[Chen, Elvis]

hi,

feeling stupid today, so please take it easy if my
question seem to be trivial.

I want to display a set of points and oriented them
according to the point normal.  I have a file with
each line of the format being:

x, y, z, xv, yv, zv

I know I should use Glyph3D for this, and use (say)
vtkConeSource for the orientation.  Glyph3D uses
vtkPolyData for the geometry, and I can enter the
coordinate (x, y, z) using vtkPolyData->SetPoints.

But where do I put the normal (xv, yv, zv) information
in vtkPolyData?

thx,

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