I am new at grasshopper . I am trying to offset the curves on a surface to perforate each voronoi for the end result of the skeletal voronoi. I have been successful at isolating each cell, but because it is a 3d object when I try to offset the lines, it is doing it in one direction as opposed to simply offsetting the curves on a surface (refer to panel titled OFFSETTING TO CREATE SKELETAL VORONOI).