Gabriele Cosmo
335 lines
12 KiB
C++
335 lines
12 KiB
C++
// This code implementation is the intellectual property of
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// the GEANT4 collaboration.
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//
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// By copying, distributing or modifying the Program (or any work
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// based on the Program) you indicate your acceptance of this statement,
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// and all its terms.
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//
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// $Id: G4FastStep.hh,v 1.5 1999/12/15 14:53:45 gunter Exp $
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// GEANT4 tag $Name: geant4-03-01 $
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//
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//
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//---------------------------------------------------------------
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//
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// G4FastStep.hh
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//
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// Description:
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// The G4FastStep class insures a friendly interface
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// to manage the primary/secondaries final state for
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// Fast Simulation Models. This includes final states of parent
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// particle (normalized direction of the momentum, energy, etc) and
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// secondary particles generated by the parameterisation.
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//
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// The G4FastStep class acts also as the G4ParticleChange
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// for the Fast Simulation Process. So it inherites from
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// the G4VParticleChange class and redefines the four virtual
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// methods :
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//
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// virtual G4Step* UpdateStepForAtRest(G4Step* Step);
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// virtual G4Step* UpdateStepForAlongStep(G4Step* Step);
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// virtual G4Step* UpdateStepForPostStep(G4Step* Step);
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// virtual void Initialize(const G4Track&);
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//
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// History:
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// Oct 97: Verderi && MoraDeFreitas - First Implementation.
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// Dec 97: Verderi - ForceSteppingHitInvocation(),
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// Set/GetTotalEnergyDeposited() methods.
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// Apr 98: MoraDeFreitas - G4FastStep becomes the G4ParticleChange
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// for the Fast Simulation Process.
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//
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//---------------------------------------------------------------
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#ifndef G4FastStep_h
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#define G4FastStep_h
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#include "globals.hh"
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#include "G4ios.hh"
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#include "G4ThreeVector.hh"
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#include "G4ParticleMomentum.hh"
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class G4DynamicParticle;
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#include "G4VParticleChange.hh"
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#include "G4FastTrack.hh"
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//-------------------------------------------
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//
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// G4FastStep class
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//
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//-------------------------------------------
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// Class Description:
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// The final state of the particles after parameterisation has to be returned through a G4FastStep
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// reference. This final state is described has "requests" the tracking will apply after your
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// parameterisation has been invoked.
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//
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// To facilitate the developers work, changes of position/normalized direction of the
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// momentum/polarization can be specified in the local coordinate system of the envelope or in the
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// global one.
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//
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// The default is local system coordinates.
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//
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class G4FastStep: public G4VParticleChange
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{
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public: // with Description
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void KillPrimaryTrack();
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// Set the kinetic energy of the primary to zero, and set the "fStopAndKill" signal
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// used by the stepping.
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// -- Methods used to change the position, normalized direction of
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// the momentum, time etc... of the primary.
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// .. space and time:
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void SetPrimaryTrackFinalPosition (const G4ThreeVector &,
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G4bool localCoordinates = true);
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// Set the primary position.
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void SetPrimaryTrackFinalTime (G4double);
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// Set the primary final time.
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void SetPrimaryTrackFinalProperTime (G4double);
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// Set the primary final Proper Time.
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// .. dynamics:
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// Be careful: the Track Final Momentum means the normalized direction
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// of the momentum!
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void SetPrimaryTrackFinalMomentum (const G4ThreeVector &,
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G4bool localCoordinates = true);
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// Set the primary final momentum.
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void SetPrimaryTrackFinalKineticEnergy (G4double);
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// Set the primary final kinetic energy.
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void SetPrimaryTrackFinalKineticEnergyAndDirection(G4double,
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const G4ThreeVector &,
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G4bool localCoordinates
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= true);
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// Set the primary final kinetic energy and direction.
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void SetPrimaryTrackFinalPolarization(const G4ThreeVector &,
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G4bool localCoordinates = true);
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// Set the primary final polarization.
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void SetPrimaryTrackPathLength (G4double);
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// Set the true path length of the primary during the step.
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void SetPrimaryTrackFinalEventBiasingWeight (G4double);
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// Set the weight applied for event biasing mechanism.
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// ------------------------------
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// -- Management of secondaries:
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// ------------------------------
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// ----------------------------------------------------
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// -- The creation of secondaries is Done in two steps:
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// -- 1) Give the total number of secondaries
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// -- that the FastStep returns
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// -- to the tracking using:
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// -- SetNumberOfSecondaryTracks()
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// --
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// -- 2) Invoke the CreateSecondaryTrack() method
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// -- to create one secondary at each time.
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// ----------------------------------------------------
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// -- Total Number of secondaries to be created,
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// -- (to be called first)
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void SetNumberOfSecondaryTracks(G4int);
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// Set the total number of secondaries that will be created.
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// -- Number of secondaries effectively stored:
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// -- (incremented at each CreateSecondaryTrack()
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// -- call)
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G4int GetNumberOfSecondaryTracks();
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// Returns the number of secondaries effectively stored.
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// -- Create a secondary: the arguments are:
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// -- * G4DynamicsParticle: see header file, many constructors exist
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// -- (allow to set particle type + energy +
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// -- the normalized direction of momentum...)
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// -- * G4ThreeVector : Polarization (not in G4ParticleChange constructor)
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// -- * G4ThreeVector : Position
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// -- * G4double : Time
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// -- * G4bool : says if Position/Momentum are given in the
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// -- local coordinate system (true by default)
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// -- Returned value: pointer to the track created.
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G4Track* CreateSecondaryTrack(const G4DynamicParticle&,
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G4ThreeVector,
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G4ThreeVector,
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G4double,
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G4bool localCoordinates=true);
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// Create a secondary. The arguments are:
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//
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// G4DynamicsParticle: see the G4DynamicsParticle reference, many constructors exist
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// (allow to set particle type + energy + the normalized direction of
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// momentum...);
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// G4ThreeVector : Polarization;
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// G4ThreeVector : Position;
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// G4double : Time;
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// G4bool : says if Position/Momentum are given in the local envelope coordinate
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// system (true by default).
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//
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// Returned value: pointer to the track created.
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//
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//-- Create a secondary: the difference with he above declaration
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//-- is that the Polarization is not given and is assumed already set
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//-- in the G4DynamicParticle.
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//-- Returned value: pointer to the track created
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G4Track* CreateSecondaryTrack(const G4DynamicParticle&,
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G4ThreeVector,
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G4double,
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G4bool localCoordinates=true);
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// Create a secondary. The difference with he above declaration is that the Polarization is not
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// given and is assumed already set in the G4DynamicParticle.
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//
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// Returned value: pointer to the track created
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G4Track* GetSecondaryTrack(G4int);
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// Returns a pointer on the i-th secondary track created.
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//------------------------------------------------
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//
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// Total energy deposit in the "fast Step"
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// (a default should be provided in future,
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// which can be:
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// delta energy of primary -
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// energy of the secondaries)
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// This allow the user to Store a consistent
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// information in the G4Trajectory.
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//
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//------------------------------------------------
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void SetTotalEnergyDeposited(G4double anEnergyPart);
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// Set the total energy deposited.
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// It should be the delta energy of primary less the energy of the secondaries.
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G4double GetTotalEnergyDeposited() const;
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// Returns the total energy deposited.
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void ForceSteppingHitInvocation();
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// Control of the stepping manager Hit invocation.
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//
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// In a usual parameterisation, the control of the hits production is under the user
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// responsability in his G4VFastSimulationModel (he generally produces several hits at once.)
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//
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// However, in the particular case the G4FastSimulation user's model acts as the physics
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// replacement only (ie replaces all the ***DoIt() and leads to the construction of a meaningful
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// G4Step), the user can delegate to the G4SteppingManager the responsability to invoke
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// the Hit()method of the current sensitive if any.
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//
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// By default, the G4SteppingManager is asked to NOT invoke this Hit() method when parameterisation
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// is invoked.
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//
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public: // Without description
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//=======================================================
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// Implementation section and kernel interfaces.
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//=======================================================
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//------------------------
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// Constructor/Destructor
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//------------------------
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G4FastStep();
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virtual ~G4FastStep();
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// equal/unequal operator
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G4bool operator==(const G4FastStep &right) const;
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G4bool operator!=(const G4FastStep &right) const;
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protected:
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// hide copy constructor and assignment operator as protected
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G4FastStep (const G4FastStep &right);
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G4FastStep & operator= (const G4FastStep &right);
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public:
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// ===============================================
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// Stepping interface.
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// ===============================================
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// --- the following methods are for updating G4Step -----
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// Return the pointer to the G4Step after updating the Step information
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// by using final state information of the track given by a Model.
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//
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// The Fast Simulation Mechanism doesn't change the track's final
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// state on the AlongDoIt loop, so the default one all we need.
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//virtual G4Step* UpdateStepForAlongStep(G4Step* Step);
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G4Step* UpdateStepForAtRest(G4Step* Step);
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G4Step* UpdateStepForPostStep(G4Step* Step);
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// A Model gives the final state of the particle
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// based on information of G4FastTrack. So the
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// Initialize method is an interface to the
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// G4FastSimulationManager to Initialize the
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// G4FastStep.
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void Initialize(const G4FastTrack&);
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private:
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//===================================================
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// Private Internal methods (implementation).
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//===================================================
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// G4FastStep should never be Initialized in this way
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// but we must define it to avoid compiler warnings.
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void Initialize(const G4Track&);
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// -- Utility functions --
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//--- methods to keep information of the final state--
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// IMPORTANT NOTE: Although the name of the class and methods are
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// "Change", what it stores (and returns in get) are the "FINAL"
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// values of the Position, the normalized direction of Momentum,
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// etc.
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// Set theMomentumChange vector: it is the final unitary momentum
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// direction.
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void SetMomentumChange(G4double Px, G4double Py, G4double Pz);
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void SetMomentumChange(const G4ThreeVector& Pfinal);
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//=====================================================
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// Data members.
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//=====================================================
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// theMomentumChange is the vector containing the final momentum
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// direction after the invoked process. The application of the change
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// of the momentum direction of the particle is not Done here.
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// The responsibility to apply the change is up the entity
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// which invoked the process.
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G4ParticleMomentum theMomentumChange;
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// The changed (final) polarization of a given particle.
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G4ThreeVector thePolarizationChange;
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// The final kinetic energy of the current particle.
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G4double theEnergyChange;
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// The changed (final) position of a given particle.
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G4ThreeVector thePositionChange;
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// The changed (final) global time of a given particle.
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G4double theTimeChange;
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// The changed (final) proper time of a given particle.
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G4double theProperTimeChange;
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// The reference G4FastTrack
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const G4FastTrack* fFastTrack;
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// weight for event biasing mechanism:
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G4double theWeightChange;
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public:
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// for Debug
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void DumpInfo() const;
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G4bool CheckIt(const G4Track&);
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};
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//*******************************************************************
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//
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// Inline functions
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//
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//*******************************************************************
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#include "G4FastStep.icc"
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#endif
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