Gabriele Cosmo
224 lines
8.7 KiB
C++
224 lines
8.7 KiB
C++
//
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// ********************************************************************
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// * License and Disclaimer *
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// * *
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// * The Geant4 software is copyright of the Copyright Holders of *
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// * the Geant4 Collaboration. It is provided under the terms and *
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// * conditions of the Geant4 Software License, included in the file *
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// * LICENSE and available at http://cern.ch/geant4/license . These *
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// * include a list of copyright holders. *
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// * *
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// * Neither the authors of this software system, nor their employing *
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// * institutes,nor the agencies providing financial support for this *
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// * work make any representation or warranty, express or implied, *
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// * regarding this software system or assume any liability for its *
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// * use. Please see the license in the file LICENSE and URL above *
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// * for the full disclaimer and the limitation of liability. *
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// * *
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// * This code implementation is the result of the scientific and *
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// * technical work of the GEANT4 collaboration. *
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// * By using, copying, modifying or distributing the software (or *
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// * any work based on the software) you agree to acknowledge its *
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// * use in resulting scientific publications, and indicate your *
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// * acceptance of all terms of the Geant4 Software license. *
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// ********************************************************************
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//
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//
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// $Id$
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//
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//
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// ------------------------------------------------------------
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// GEANT 4 include file implementation
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// ------------------------------------------------------------
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//
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// Class description:
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//
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// G4Transportation is a process responsible for the transportation of
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// a particle, i.e. the geometrical propagation encountering the
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// geometrical sub-volumes of the detectors.
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// It is also tasked with part of updating the "safety".
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// =======================================================================
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// Created: 19 March 1997, J. Apostolakis
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// =======================================================================
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#ifndef G4Transportation_hh
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#define G4Transportation_hh 1
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#include "G4VProcess.hh"
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#include "G4FieldManager.hh"
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#include "G4Navigator.hh"
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#include "G4TransportationManager.hh"
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#include "G4PropagatorInField.hh"
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#include "G4Track.hh"
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#include "G4Step.hh"
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#include "G4ParticleChangeForTransport.hh"
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class G4SafetyHelper;
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class G4Transportation : public G4VProcess
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{
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// Concrete class that does the geometrical transport
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public: // with description
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G4Transportation( G4int verbosityLevel= 1);
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~G4Transportation();
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G4double AlongStepGetPhysicalInteractionLength(
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const G4Track& track,
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G4double previousStepSize,
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G4double currentMinimumStep,
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G4double& currentSafety,
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G4GPILSelection* selection
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);
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G4VParticleChange* AlongStepDoIt(
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const G4Track& track,
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const G4Step& stepData
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);
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G4VParticleChange* PostStepDoIt(
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const G4Track& track,
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const G4Step& stepData
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);
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// Responsible for the relocation.
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G4double PostStepGetPhysicalInteractionLength(
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const G4Track& ,
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G4double previousStepSize,
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G4ForceCondition* pForceCond
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);
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// Forces the PostStepDoIt action to be called,
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// but does not limit the step.
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G4PropagatorInField* GetPropagatorInField();
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void SetPropagatorInField( G4PropagatorInField* pFieldPropagator);
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// Access/set the assistant class that Propagate in a Field.
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inline void SetVerboseLevel( G4int verboseLevel );
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inline G4int GetVerboseLevel() const;
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// Level of warnings regarding eg energy conservation
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// in field integration.
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inline G4double GetThresholdWarningEnergy() const;
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inline G4double GetThresholdImportantEnergy() const;
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inline G4int GetThresholdTrials() const;
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inline void SetThresholdWarningEnergy( G4double newEnWarn );
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inline void SetThresholdImportantEnergy( G4double newEnImp );
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inline void SetThresholdTrials(G4int newMaxTrials );
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// Get/Set parameters for killing loopers:
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// Above 'important' energy a 'looping' particle in field will
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// *NOT* be abandoned, except after fThresholdTrials attempts.
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// Below Warning energy, no verbosity for looping particles is issued
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inline G4double GetMaxEnergyKilled() const;
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inline G4double GetSumEnergyKilled() const;
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inline void ResetKilledStatistics( G4int report = 1);
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// Statistics for tracks killed (currently due to looping in field)
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inline void EnableShortStepOptimisation(G4bool optimise=true);
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// Whether short steps < safety will avoid to call Navigator (if field=0)
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inline G4bool EnableUseMagneticMoment(G4bool useMoment=true);
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// Whether to deflect particles with force due to magnetic moment
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public: // without description
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G4double AtRestGetPhysicalInteractionLength(
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const G4Track& ,
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G4ForceCondition*
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) { return -1.0; };
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// No operation in AtRestDoIt.
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G4VParticleChange* AtRestDoIt(
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const G4Track& ,
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const G4Step&
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) {return 0;};
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// No operation in AtRestDoIt.
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void StartTracking(G4Track* aTrack);
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// Reset state for new (potentially resumed) track
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protected:
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G4bool DoesGlobalFieldExist();
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// Checks whether a field exists for the "global" field manager.
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private:
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G4Navigator* fLinearNavigator;
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G4PropagatorInField* fFieldPropagator;
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// The Propagators used to transport the particle
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// G4FieldManager* fGlobalFieldMgr; // Used MagneticField CC
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// Field Manager for the whole Detector
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G4ThreeVector fTransportEndPosition;
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G4ThreeVector fTransportEndMomentumDir;
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G4double fTransportEndKineticEnergy;
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G4ThreeVector fTransportEndSpin;
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G4bool fMomentumChanged;
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G4bool fEnergyChanged;
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G4bool fEndGlobalTimeComputed;
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G4double fCandidateEndGlobalTime;
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// The particle's state after this Step, Store for DoIt
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G4bool fParticleIsLooping;
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G4TouchableHandle fCurrentTouchableHandle;
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// G4bool fFieldExists;
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// Whether a magnetic field exists ...
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// A data member for this is problematic: it is useful only if it
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// can be initialised and updated -- and a scheme is not yet possible.
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G4bool fGeometryLimitedStep;
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// Flag to determine whether a boundary was reached.
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G4ThreeVector fPreviousSftOrigin;
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G4double fPreviousSafety;
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// Remember last safety origin & value.
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G4ParticleChangeForTransport fParticleChange;
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// New ParticleChange
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G4double fEndPointDistance;
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// Thresholds for looping particles:
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//
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G4double fThreshold_Warning_Energy; // Warn above this energy
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G4double fThreshold_Important_Energy; // Hesitate above this
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G4int fThresholdTrials; // for this no of trials
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// Above 'important' energy a 'looping' particle in field will
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// *NOT* be abandoned, except after fThresholdTrials attempts.
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G4double fUnimportant_Energy;
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// Below this energy, no verbosity for looping particles is issued
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// Counter for steps in which particle reports 'looping',
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// if it is above 'Important' Energy
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G4int fNoLooperTrials;
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// Statistics for tracks abandoned
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G4double fSumEnergyKilled;
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G4double fMaxEnergyKilled;
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// Whether to avoid calling G4Navigator for short step ( < safety)
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// If using it, the safety estimate for endpoint will likely be smaller.
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G4bool fShortStepOptimisation;
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// Whether to track state change from magnetic moment in a B-field
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G4bool fUseMagneticMoment;
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G4SafetyHelper* fpSafetyHelper; // To pass it the safety value obtained
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// Verbosity
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G4int fVerboseLevel;
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// Verbosity level for warnings
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// eg about energy non-conservation in magnetic field.
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};
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#include "G4Transportation.icc"
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#endif
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