[vtkusers] How to draw a vector field?

[Adriano Tittarelli]

Hi all,
I must draw a vector field.
I have a data file like this:

x y z Fx Fy Fz

I thought to do it drawing vectors as thin cilinders with a cone on top.
Have anybody done something similar that could help me?
Is there any other way?

I was also wondering what point is the center of rotation for a cone and for
a cilinder.
Thank you all very much!
Adriano