Inoshandiswa kuyedza, kuongorora uye kuongorora mashandiro emuchina wekufambisa jira mumvura ine mvura. Yakavakirwa pakuziva kusagadzikana kwemvura, kudzorwa kwemvura uye kunyudzwa kwemvura kwechimiro chejira, kusanganisira geometry uye chimiro chemukati chejira uye hunhu hwepakati hwekukwezva shinda dzejira neshinda.
