float OEDetermineRingComplexity(const OEChem::OEMolBase &mol)
The molecule argument is
const, so this function requires that the
OEFindRingAtomsAndBonds perception activity has been
performed prior to calling this function.
This is a non-SSSR adaptation of the ring complexity algorithm of [Gasteiger-1979]. The values of this complexity are generally somewhat lower, but are well-correlated and follow the spirit of the SSSR method.