def _read_opbend(self, f):
""" Reads the out-of-plane bending terms """
self.oopbend_list = OutOfPlaneBendList()
# Eat the next 3 lines
f.readline()
f.readline()
f.readline()
line = f.readline()
for i in xrange(self.pointers['nopbend']):
try:
int(line[0:6])
at1 = int(line[9:15]) - 1
at2 = int(line[15:21]) - 1
at3 = int(line[21:27]) - 1
at4 = int(line[27:33]) - 1
self.oopbend_list.add(self.atom_list[at1], self.atom_list[at2],
self.atom_list[at3], self.atom_list[at4],
line[42:52])
except ValueError:
raise TinkerAnaloutError('Error parsing out-of-plane '
'bending term')
line = f.readline()
