| 1 | //
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| 2 | // ********************************************************************
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| 3 | // * License and Disclaimer *
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| 4 | // * *
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| 5 | // * The Geant4 software is copyright of the Copyright Holders of *
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| 6 | // * the Geant4 Collaboration. It is provided under the terms and *
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| 7 | // * conditions of the Geant4 Software License, included in the file *
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| 8 | // * LICENSE and available at http://cern.ch/geant4/license . These *
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| 9 | // * include a list of copyright holders. *
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| 10 | // * *
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| 11 | // * Neither the authors of this software system, nor their employing *
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| 12 | // * institutes,nor the agencies providing financial support for this *
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| 13 | // * work make any representation or warranty, express or implied, *
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| 14 | // * regarding this software system or assume any liability for its *
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| 15 | // * use. Please see the license in the file LICENSE and URL above *
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| 16 | // * for the full disclaimer and the limitation of liability. *
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| 17 | // * *
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| 18 | // * This code implementation is the result of the scientific and *
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| 19 | // * technical work of the GEANT4 collaboration. *
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| 20 | // * By using, copying, modifying or distributing the software (or *
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| 21 | // * any work based on the software) you agree to acknowledge its *
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| 22 | // * use in resulting scientific publications, and indicate your *
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| 23 | // * acceptance of all terms of the Geant4 Software license. *
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| 24 | // ********************************************************************
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| 25 | //
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| 26 | //
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| 27 | // $Id: G4Transportation.hh,v 1.17 2007/11/09 15:39:20 japost Exp $
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| 28 | // GEANT4 tag $Name: geant4-09-04-beta-01 $
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| 29 | //
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| 30 | //
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| 31 | // ------------------------------------------------------------
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| 32 | // GEANT 4 include file implementation
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| 33 | // ------------------------------------------------------------
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| 34 | //
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| 35 | // Class description:
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| 36 | //
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| 37 | // G4Transportation is a process responsible for the transportation of
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| 38 | // a particle, i.e. the geometrical propagation encountering the
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| 39 | // geometrical sub-volumes of the detectors.
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| 40 | // It is also tasked with part of updating the "safety".
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| 41 |
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| 42 | // =======================================================================
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| 43 | // Created: 19 March 1997, J. Apostolakis
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| 44 | // =======================================================================
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| 45 | #ifndef G4Transportation_hh
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| 46 | #define G4Transportation_hh 1
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| 47 |
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| 48 | #include "G4VProcess.hh"
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| 49 | #include "G4FieldManager.hh"
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| 50 |
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| 51 | #include "G4Navigator.hh"
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| 52 | #include "G4TransportationManager.hh"
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| 53 | #include "G4PropagatorInField.hh"
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| 54 | #include "G4Track.hh"
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| 55 | #include "G4Step.hh"
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| 56 | #include "G4ParticleChangeForTransport.hh"
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| 57 | class G4SafetyHelper;
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| 58 |
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| 59 | class G4Transportation : public G4VProcess
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| 60 | {
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| 61 | // Concrete class that does the geometrical transport
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| 62 |
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| 63 | public: // with description
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| 64 |
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| 65 | G4Transportation( G4int verbosityLevel= 1);
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| 66 | ~G4Transportation();
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| 67 |
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| 68 | G4double AlongStepGetPhysicalInteractionLength(
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| 69 | const G4Track& track,
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| 70 | G4double previousStepSize,
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| 71 | G4double currentMinimumStep,
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| 72 | G4double& currentSafety,
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| 73 | G4GPILSelection* selection
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| 74 | );
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| 75 |
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| 76 | G4VParticleChange* AlongStepDoIt(
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| 77 | const G4Track& track,
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| 78 | const G4Step& stepData
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| 79 | );
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| 80 |
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| 81 | G4VParticleChange* PostStepDoIt(
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| 82 | const G4Track& track,
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| 83 | const G4Step& stepData
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| 84 | );
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| 85 | // Responsible for the relocation.
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| 86 |
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| 87 | G4double PostStepGetPhysicalInteractionLength(
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| 88 | const G4Track& ,
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| 89 | G4double previousStepSize,
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| 90 | G4ForceCondition* pForceCond
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| 91 | );
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| 92 | // Forces the PostStepDoIt action to be called,
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| 93 | // but does not limit the step.
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| 94 |
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| 95 | G4PropagatorInField* GetPropagatorInField();
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| 96 | void SetPropagatorInField( G4PropagatorInField* pFieldPropagator);
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| 97 | // Access/set the assistant class that Propagate in a Field.
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| 98 |
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| 99 | inline void SetVerboseLevel( G4int verboseLevel );
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| 100 | inline G4int GetVerboseLevel() const;
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| 101 | // Level of warnings regarding eg energy conservation
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| 102 | // in field integration.
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| 103 |
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| 104 | inline G4double GetThresholdWarningEnergy() const;
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| 105 | inline G4double GetThresholdImportantEnergy() const;
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| 106 | inline G4int GetThresholdTrials() const;
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| 107 |
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| 108 | inline void SetThresholdWarningEnergy( G4double newEnWarn );
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| 109 | inline void SetThresholdImportantEnergy( G4double newEnImp );
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| 110 | inline void SetThresholdTrials(G4int newMaxTrials );
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| 111 |
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| 112 | // Get/Set parameters for killing loopers:
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| 113 | // Above 'important' energy a 'looping' particle in field will
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| 114 | // *NOT* be abandoned, except after fThresholdTrials attempts.
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| 115 | // Below Warning energy, no verbosity for looping particles is issued
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| 116 |
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| 117 | inline G4double GetMaxEnergyKilled() const;
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| 118 | inline G4double GetSumEnergyKilled() const;
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| 119 | inline void ResetKilledStatistics( G4int report = 1);
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| 120 | // Statistics for tracks killed (currently due to looping in field)
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| 121 |
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| 122 | inline void EnableShortStepOptimisation(G4bool optimise=true);
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| 123 | // Whether short steps < safety will avoid to call Navigator (if field=0)
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| 124 |
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| 125 | public: // without description
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| 126 |
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| 127 | G4double AtRestGetPhysicalInteractionLength(
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| 128 | const G4Track& ,
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| 129 | G4ForceCondition*
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| 130 | ) { return -1.0; };
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| 131 | // No operation in AtRestDoIt.
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| 132 |
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| 133 | G4VParticleChange* AtRestDoIt(
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| 134 | const G4Track& ,
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| 135 | const G4Step&
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| 136 | ) {return 0;};
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| 137 | // No operation in AtRestDoIt.
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| 138 |
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| 139 | void StartTracking(G4Track* aTrack);
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| 140 | // Reset state for new (potentially resumed) track
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| 141 |
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| 142 | protected:
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| 143 |
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| 144 | G4bool DoesGlobalFieldExist();
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| 145 | // Checks whether a field exists for the "global" field manager.
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| 146 |
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| 147 | private:
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| 148 |
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| 149 | G4Navigator* fLinearNavigator;
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| 150 | G4PropagatorInField* fFieldPropagator;
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| 151 | // The Propagators used to transport the particle
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| 152 |
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| 153 | // G4FieldManager* fGlobalFieldMgr; // Used MagneticField CC
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| 154 | // Field Manager for the whole Detector
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| 155 |
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| 156 | G4ThreeVector fTransportEndPosition;
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| 157 | G4ThreeVector fTransportEndMomentumDir;
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| 158 | G4double fTransportEndKineticEnergy;
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| 159 | G4ThreeVector fTransportEndSpin;
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| 160 | G4bool fMomentumChanged;
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| 161 | G4bool fEnergyChanged;
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| 162 | G4bool fEndGlobalTimeComputed;
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| 163 | G4double fCandidateEndGlobalTime;
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| 164 | // The particle's state after this Step, Store for DoIt
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| 165 |
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| 166 | G4bool fParticleIsLooping;
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| 167 |
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| 168 | G4TouchableHandle fCurrentTouchableHandle;
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| 169 |
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| 170 | // G4bool fFieldExists;
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| 171 | // Whether a magnetic field exists ...
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| 172 | // A data member for this is problematic: it is useful only if it
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| 173 | // can be initialised and updated -- and a scheme is not yet possible.
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| 174 |
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| 175 | G4bool fGeometryLimitedStep;
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| 176 | // Flag to determine whether a boundary was reached.
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| 177 |
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| 178 | G4ThreeVector fPreviousSftOrigin;
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| 179 | G4double fPreviousSafety;
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| 180 | // Remember last safety origin & value.
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| 181 |
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| 182 | G4ParticleChangeForTransport fParticleChange;
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| 183 | // New ParticleChange
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| 184 |
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| 185 | G4double endpointDistance;
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| 186 |
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| 187 | // Thresholds for looping particles:
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| 188 | //
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| 189 | G4double fThreshold_Warning_Energy; // Warn above this energy
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| 190 | G4double fThreshold_Important_Energy; // Hesitate above this
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| 191 | G4int fThresholdTrials; // for this no of trials
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| 192 | // Above 'important' energy a 'looping' particle in field will
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| 193 | // *NOT* be abandoned, except after fThresholdTrials attempts.
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| 194 | G4double fUnimportant_Energy;
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| 195 | // Below this energy, no verbosity for looping particles is issued
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| 196 |
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| 197 | // Counter for steps in which particle reports 'looping',
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| 198 | // if it is above 'Important' Energy
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| 199 | G4int fNoLooperTrials;
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| 200 | // Statistics for tracks abandoned
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| 201 | G4double fSumEnergyKilled;
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| 202 | G4double fMaxEnergyKilled;
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| 203 |
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| 204 | // Whether to avoid calling G4Navigator for short step ( < safety)
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| 205 | // If using it, the safety estimate for endpoint will likely be smaller.
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| 206 | G4bool fShortStepOptimisation;
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| 207 |
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| 208 | G4SafetyHelper* fpSafetyHelper; // To pass it the safety value obtained
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| 209 |
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| 210 | // Verbosity
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| 211 | G4int fVerboseLevel;
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| 212 | // Verbosity level for warnings
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| 213 | // eg about energy non-conservation in magnetic field.
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| 214 | };
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| 215 |
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| 216 | #include "G4Transportation.icc"
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| 217 |
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| 218 | #endif
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