def interpolate_length(lengths, secs, interp):
points = []
for station in range(0, len(lengths)):
points.append(FreeCAD.Vector(secs[station], lengths[station], 0))
BSpline = Part.BSplineCurve(points)
wire = DraftGeomUtils.curvetowire(BSpline, interp)
ys = [lengths[0]]
for edge in wire:
ys.append(edge.lastVertex().Y)
return ys
