def rotate_surface():
"""Rotate the stl model."""
if not check_surface():
return
itemlist = [ [ 'axis',0], ['angle','0.0'] ]
res,accept = widgets.inputDialog(itemlist,'Rotation Parameters').getResult()
if accept:
updateGUI()
print res
nodes,elems = PF['old_surface'] = PF['surface']
F = Formex(nodes.reshape((-1,1,3)))
nodes = F.rotate(float(res[1][1]),int(res[0][1])).f
PF['surface'] = nodes,elems
clear()
show_changes(PF['old_surface'],PF['surface'])
