Fill out (length nPositions, 1 = audible) for every row of desc and
return the audible count. A descriptor without positions is the caller's
business (it is live everywhere); this function expects rows.
A node whose nd_transform leaves the slice with no preimage is silent, like
the geometry it would accompany.
Fill
out(lengthnPositions, 1 = audible) for every row ofdescand return the audible count. A descriptor without positions is the caller's business (it is live everywhere); this function expects rows.A node whose
nd_transformleaves the slice with no preimage is silent, like the geometry it would accompany.