def scale_surface():
"""Scale the stl model."""
if not check_surface():
return
itemlist = [ [ 'X-scale',1.0], [ 'Y-scale',1.0], [ 'Z-scale',1.0] ]
res,accept = widgets.inputDialog(itemlist,'Scaling Parameters').getResult()
if accept:
updateGUI()
scale = map(float,[r[1] for r in res])
print scale
nodes,elems = PF['old_surface'] = PF['surface']
F = Formex(nodes.reshape((-1,1,3)))
nodes = F.scale(scale).f
PF['surface'] = nodes,elems
clear()
show_changes(PF['old_surface'],PF['surface'])
