- o -

• ONE : dd4hep::VolumeManager
• ONSTACK : dd4hep::Condition
• OPTIMIZE_LAST : dd4hep::sim::Geant4HitCollection
• OPTIMIZE_MAPPEDLOOKUP : dd4hep::sim::Geant4HitCollection
• OPTIMIZE_NONE : dd4hep::sim::Geant4HitCollection
• OPTIMIZE_REPEATEDLOOKUP : dd4hep::sim::Geant4HitCollection
• OrthogonalToZ : dd4hep::rec::SurfaceType
• OVERLAP_DEFINED : dd4hep::align::GlobalAlignmentStack
• OVERLAY : dd4hep::CartesianField , dd4hep::OverlayedField