Hi @karimammor,
Welcome to the forums!
Simply use Surface Closest Point (SrfCP)
to find a UV Point (uvP) for each of your points. Then evaluate your surface with Evaluate Surface (EvalSrf)
at each UV Point, in order to find its corresponding normal. Lastly, draw a Line SDL (Line)
from each point in the direction of the its designated normal and a desired length.
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