I am using vol format to store the NetGen generated mesh as it gives me some surface information that I need. But I have some
question regarding edge data in it.
With opencascade, we define curves and with curves we define surfaces. In Vol edge data, it seems that the surfid of the edge
is stored and not the curveid. Also there is no information about "U" parameter ( as in surface elements, there is "u.v" information stored).
Similarly in the edge data the second column name is "0" and the data in that column is zero too. What is the significance of this