def sharpen_v(vmax,estep):
lines = list(db.Vline.select().order_by(db.Vline.vval))
for i,x in enumerate(lines[:-1]):
newv = (x.vval +lines[i+1].vval) / 2
if x.vval == newv:
continue #line exists
db.add_vline(newv,estep)
def scale_v(vmax,estep):
vmax *= 2
db.add_vline(vmax,estep)
return vmax
