Geant4 User's Guide for Application Developers - Geant4 - CERN

Toolkit Fundamentals- tracks (G4Track): aTrackAllocator- stacked tracks (G4StackedTrack): aStackedTrackAllocator- primary particles (G4PrimaryParticle): aPrimaryParticleAllocator- primary vertices (G4PrimaryVertex): aPrimaryVertexAllocator- decay products (G4DecayProducts): aDecayProductsAllocator- digits collections of an event (G4DCofThisEvent): anDCoTHAllocator- digits collections (G4DigiCollection): aDCAllocator- hits collections of an event (G4HCofThisEvent): anHCoTHAllocator- hits collections (G4HitsCollection): anHCAllocator- touchable histories (G4TouchableHistory): aTouchableHistoryAllocator- trajectories (G4Trajectory): aTrajectoryAllocator- trajectory points (G4TrajectoryPoint): aTrajectoryPointAllocator- trajectory containers (G4TrajectoryContainer): aTrajectoryContainerAllocator- navigation levels (G4NavigationLevel): aNavigationLevelAllocator- navigation level nodes (G4NavigationLevelRep): aNavigLevelRepAllocator- reference-counted handles (G4ReferenceCountedHandle): aRCHAllocator- counted objects (G4CountedObject): aCountedObjectAllocator- HEPEvt primary particles (G4HEPEvtParticle): aHEPEvtParticleAllocator- electron occupancy objects(G4ElectronOccupancy): aElectronOccupancyAllocator- "rich" trajectories (G4RichTrajectory): aRichTrajectoryAllocator- "rich" trajectory points (G4RichTrajectoryPoint): aRichTrajectoryPointAllocator- "smooth" trajectories (G4SmoothTrajectory): aSmoothTrajectoryAllocator- "smooth" trajectory points (G4SmoothTrajectoryPoint): aSmoothTrajectoryPointAllocator- "ray" trajectories (G4RayTrajectory): G4RayTrajectoryAllocator- "ray" trajectory points (G4RayTrajectoryPoint): G4RayTrajectoryPointAllocatorFor each of these allocators, accessible from the global namespace, it is possible to monitor the allocation intheir memory pools or force them to release the allocated memory (for example at the end of a run):// Return the size of the total memory allocated for tracks//aTrackAllocator.GetAllocatedSize();// Return allocated storage for tracks to the free store//aTrackAllocator.ResetStorage();• G4ReferenceCountedHandleTemplate class acting as a smart pointer and wrapping the type to be counted. It performs the reference countingduring the life-time of the counted object.• G4FastVectorTemplate class defining a vector of pointers, not performing boundary checking.• G4PhysicsVectorDefines a physics vector which has values of energy-loss, cross-section, and other physics values of a particlein matter in a given range of the energy, momentum, etc. This class serves as the base class for a vectorhaving various energy scale, for example like 'log' (G4PhysicsLogVector) 'linear' (G4PhysicsLinearVector),'free' (G4PhysicsFreeVector), etc.• G4LPhysicsFreeVectorImplements a free vector for low energy physics cross-section data. A subdivision method is used to find theenergy|momentum bin.• G4PhysicsOrderedFreeVectorA physics ordered free vector inherits from G4PhysicsVector. It provides, in addition, a method for the userto insert energy/value pairs in sequence. Methods to retrieve the max and min energies and values from thevector are also provided.• G4TimerUtility class providing methods to measure elapsed user/system process time. Uses and - POSIX.1.• G4UserLimitsClass collecting methods for get and set any kind of step limitation allowed in Geant4.40