Returns the U value (Long) of the sampling coordinate local to the NurbsSurface.
set oCube = ActiveSceneRoot.AddGeometry("Cube","NurbsSurface")
set oFacet = oCube.ActivePrimitive.Geometry.Facets(0)
for each oSample in oFacet.Samples
logmessage "The U value of this sample is: " & oSample.USamplingCoordinate
next
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