def unit(self):
'''Normalize this vector to unit length.
@return: Normalized vector (L{Nvector}).
'''
if self._united is None:
u = Vector3d.unit(self) # .copy()
self._united = u._united = _xattrs(u, self, '_h')
return self._united
def unit(self, ll=None):
'''Normalize this vector to unit length.
@keyword ll: Optional, original latlon (C{LatLon}).
@return: Normalized vector (L{Nvector}).
'''
if self._united is None:
u = Vector3d.unit(self, ll=ll) # .copy()
self._united = u._united = _xattrs(u, self, '_h')
return self._united
def unit(self):
'''Normalize this vector to unit length.
@return: Normalised, unit vector (L{Nvector}).
'''
if self._united is None:
u = Vector3d.unit(self).copy()
if u.h != self.h:
u.h = self.h
self._united = u._united = u
return self._united
