Gabriele Cosmo
166 lines
6.0 KiB
C++
166 lines
6.0 KiB
C++
//
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// ********************************************************************
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// * DISCLAIMER *
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// * *
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// * The following disclaimer summarizes all the specific disclaimers *
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// * of contributors to this software. The specific disclaimers,which *
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// * govern, are listed with their locations in: *
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// * http://cern.ch/geant4/license *
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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. *
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// * *
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// * This code implementation is the intellectual property of the *
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// * GEANT4 collaboration. *
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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 *
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// * statement, and all its terms. *
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// ********************************************************************
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//
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//
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// $Id: G4Transportation.hh,v 1.7 2002/08/29 15:32:00 dressel Exp $
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// GEANT4 tag $Name: geant4-05-00 $
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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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//
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// This class' object is a process responsible for the transportation of
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// a particle, ie the geometrical propagation that encounters the
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// geometrical sub-volumes of the detectors.
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//
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// It is also tasked with part of updating the "safety".
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//
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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 G4Transportation : public G4VProcess
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{
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// Concrete class that does the geometrical transport
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public:
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G4Transportation();
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~G4Transportation();
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// G4double GetContinuousStepLimit (
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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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// This only does the relocation
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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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// This forces the PostStepDoIt action to be called,
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// but does not limit the step.
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//
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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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// Access/set the assistant class that Propagate in a Field
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G4PropagatorInField* GetPropagatorInField();
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void SetPropagatorInField( G4PropagatorInField* pFieldPropagator);
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// no operation in AtRestDoIt
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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 NULL;};
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protected:
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// Checks whether a field exists for the "global" field manager.
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G4bool DoesGlobalFieldExist();
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private:
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// The Propagators used to transport the particle
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G4Navigator* fLinearNavigator;
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G4PropagatorInField* fFieldPropagator;
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// Field Manager for the whole Detector
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// G4FieldManager* fGlobalFieldMgr; // Used MagneticField CC
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// The particle's state after this Step, Store for DoIt
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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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G4bool fParticleIsLooping;
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G4TouchableHandle fCurrentTouchableHandle;
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// Whether a magnetic field exists ...
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// G4bool fFieldExists;
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// The above data member is problematic: it is useful only if
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// it is initialised. However the transportation process(es) are not
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// capable of doing this initialisation itself (themselves) and there
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// seems no alternative agent capable of doing it right now.
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// Eg, at construction time it is likely that the field manager has
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// not yet been informed about the detector's field
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// I cannot foresee how the transportation can be informed later. JA
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// The current answer is to ignore this data member and use
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// the member function DoesGlobalFieldExist() in its place ...
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// John Apostolakis, July 7, 1997
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// Flag to determine whether a boundary was reached.
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G4bool fGeometryLimitedStep;
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// Remember last safety origin & value.
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G4ThreeVector fPreviousSftOrigin;
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G4double fPreviousSafety;
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// New ParticleChange
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G4ParticleChangeForTransport fParticleChange;
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G4double endpointDistance;
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};
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#include "G4Transportation.icc"
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#endif
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// End of G4Transportation.hh
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