Gabriele Cosmo
266 lines
9.7 KiB
C++
266 lines
9.7 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: G4ParticleChangeForTransport.cc 87698 2014-12-17 09:41:28Z gcosmo $
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//
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//
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// --------------------------------------------------------------
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// GEANT 4 class implementation file
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//
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//
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//
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// ------------------------------------------------------------
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// Implemented for the new scheme 10 May. 1998 H.Kurahige
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// Correct tratment of fpNextTouchable 12 May. 1998 H.Kurashige
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// Change to the next volume only if energy>0 19 Jan. 2004 V.Ivanchenko
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// --------------------------------------------------------------
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#include "G4ParticleChangeForTransport.hh"
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#include "G4TouchableHandle.hh"
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#include "G4Track.hh"
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#include "G4Step.hh"
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#include "G4TrackFastVector.hh"
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#include "G4DynamicParticle.hh"
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G4ParticleChangeForTransport::G4ParticleChangeForTransport()
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: G4ParticleChange(), isMomentumChanged(false), theMaterialChange(0),
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theMaterialCutsCoupleChange(0), theSensitiveDetectorChange(0),
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fpVectorOfAuxiliaryPointsPointer(0)
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{
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if (verboseLevel>2) {
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G4cout << "G4ParticleChangeForTransport::G4ParticleChangeForTransport() "
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<< G4endl;
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}
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}
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G4ParticleChangeForTransport::~G4ParticleChangeForTransport()
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{
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if (verboseLevel>2) {
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G4cout << "G4ParticleChangeForTransport::~G4ParticleChangeForTransport() "
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<< G4endl;
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}
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}
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G4ParticleChangeForTransport::
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G4ParticleChangeForTransport(const G4ParticleChangeForTransport &r)
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: G4ParticleChange(r),
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fpVectorOfAuxiliaryPointsPointer(0)
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{
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if (verboseLevel>0) {
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G4cout << "G4ParticleChangeForTransport:: copy constructor is called "
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<< G4endl;
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}
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theTouchableHandle = r.theTouchableHandle;
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isMomentumChanged = r.isMomentumChanged;
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theMaterialChange = r.theMaterialChange;
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theMaterialCutsCoupleChange = r.theMaterialCutsCoupleChange;
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theSensitiveDetectorChange = r.theSensitiveDetectorChange;
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}
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// assignemnt operator
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G4ParticleChangeForTransport &
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G4ParticleChangeForTransport::operator=(const G4ParticleChangeForTransport &r)
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{
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if (verboseLevel>1) {
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G4cout << "G4ParticleChangeForTransport:: assignment operator is called "
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<< G4endl;
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}
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if (this != &r)
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{
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theListOfSecondaries = r.theListOfSecondaries;
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theSizeOftheListOfSecondaries = r.theSizeOftheListOfSecondaries;
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theNumberOfSecondaries = r.theNumberOfSecondaries;
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theStatusChange = r.theStatusChange;
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theTouchableHandle = r.theTouchableHandle;
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theMaterialChange = r.theMaterialChange;
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theMaterialCutsCoupleChange = r.theMaterialCutsCoupleChange;
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theSensitiveDetectorChange = r.theSensitiveDetectorChange;
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theMomentumDirectionChange = r.theMomentumDirectionChange;
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thePolarizationChange = r.thePolarizationChange;
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thePositionChange = r.thePositionChange;
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theTimeChange = r.theTimeChange;
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theEnergyChange = r.theEnergyChange;
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theVelocityChange = r.theVelocityChange;
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theTrueStepLength = r.theTrueStepLength;
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theLocalEnergyDeposit = r.theLocalEnergyDeposit;
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theSteppingControlFlag = r.theSteppingControlFlag;
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}
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return *this;
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}
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//----------------------------------------------------------------
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// methods for updating G4Step
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//
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G4Step* G4ParticleChangeForTransport::UpdateStepForAtRest(G4Step* pStep)
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{
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// Nothing happens for AtRestDoIt
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if (verboseLevel>0) {
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G4cout << "G4ParticleChangeForTransport::UpdateStepForAtRest() is called"
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<< G4endl;
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G4cout << " Nothing happens for this method " << G4endl;
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}
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// Update the G4Step specific attributes
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return UpdateStepInfo(pStep);
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}
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G4Step* G4ParticleChangeForTransport::UpdateStepForAlongStep(G4Step* pStep)
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{
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// Smooth curved tajectory representation: let the Step know about
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// the auxiliary trajectory points (jacek 30/10/2002)
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pStep->SetPointerToVectorOfAuxiliaryPoints(fpVectorOfAuxiliaryPointsPointer);
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// copy of G4ParticleChange::UpdateStepForAlongStep
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// i.e. no effect for touchable
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// A physics process always calculates the final state of the
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// particle relative to the initial state at the beginning
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// of the Step, i.e., based on information of G4Track (or
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// equivalently the PreStepPoint).
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// So, the differences (delta) between these two states have to be
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// calculated and be accumulated in PostStepPoint.
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// Take note that the return type of GetMomentumChange is a
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// pointer to G4ThreeVector. Also it is a normalized
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// momentum vector.
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G4StepPoint* pPreStepPoint = pStep->GetPreStepPoint();
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G4StepPoint* pPostStepPoint = pStep->GetPostStepPoint();
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G4Track* aTrack = pStep->GetTrack();
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G4double mass = aTrack->GetDynamicParticle()->GetMass();
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// uodate kinetic energy
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// now assume that no energy change in transportation
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// However it is not true in electric fields
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// Case for changing energy will be implemented in future
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// update momentum direction and energy
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if (isMomentumChanged) {
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G4double energy;
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energy= pPostStepPoint->GetKineticEnergy()
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+ (theEnergyChange - pPreStepPoint->GetKineticEnergy());
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// calculate new momentum
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G4ThreeVector pMomentum = pPostStepPoint->GetMomentum()
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+ ( CalcMomentum(theEnergyChange, theMomentumDirectionChange, mass)
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- pPreStepPoint->GetMomentum());
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G4double tMomentum = pMomentum.mag();
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G4ThreeVector direction(1.0,0.0,0.0);
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if( tMomentum > 0. ){
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G4double inv_Momentum= 1.0 / tMomentum;
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direction= pMomentum * inv_Momentum;
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}
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pPostStepPoint->SetMomentumDirection(direction);
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pPostStepPoint->SetKineticEnergy( energy );
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}
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if (isVelocityChanged) pPostStepPoint->SetVelocity(theVelocityChange);
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// stop case should not occur
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//pPostStepPoint->SetMomentumDirection(G4ThreeVector(1., 0., 0.));
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// update polarization
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pPostStepPoint->AddPolarization( thePolarizationChange
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- pPreStepPoint->GetPolarization());
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// update position and time
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pPostStepPoint->AddPosition( thePositionChange
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- pPreStepPoint->GetPosition() );
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pPostStepPoint->AddGlobalTime( theTimeChange
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- pPreStepPoint->GetLocalTime());
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pPostStepPoint->AddLocalTime( theTimeChange
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- pPreStepPoint->GetLocalTime());
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pPostStepPoint->AddProperTime( theProperTimeChange
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- pPreStepPoint->GetProperTime());
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#ifdef G4VERBOSE
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if (debugFlag) CheckIt(*aTrack);
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#endif
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// Update the G4Step specific attributes
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//pStep->SetStepLength( theTrueStepLength );
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// pStep->AddTotalEnergyDeposit( theLocalEnergyDeposit );
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pStep->SetControlFlag( theSteppingControlFlag );
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return pStep;
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// return UpdateStepInfo(pStep);
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}
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G4Step* G4ParticleChangeForTransport::UpdateStepForPostStep(G4Step* pStep)
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{
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// A physics process always calculates the final state of the particle
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// Change volume only if some kinetic energy remains
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G4StepPoint* pPostStepPoint = pStep->GetPostStepPoint();
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if(pPostStepPoint->GetKineticEnergy() > 0.0) {
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// update next touchable
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// (touchable can be changed only at PostStepDoIt)
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pPostStepPoint->SetTouchableHandle( theTouchableHandle );
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pPostStepPoint->SetMaterial( theMaterialChange );
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pPostStepPoint->SetMaterialCutsCouple( theMaterialCutsCoupleChange );
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pPostStepPoint->SetSensitiveDetector( theSensitiveDetectorChange );
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}
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if( this->GetFirstStepInVolume() ){
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pStep->SetFirstStepFlag();
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}else{
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pStep->ClearFirstStepFlag();
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}
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if( this->GetLastStepInVolume() ){
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pStep->SetLastStepFlag();
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}else{
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pStep->ClearLastStepFlag();
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}
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// It used to call base class's method
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// - but this would copy uninitialised data members
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// return G4ParticleChange::UpdateStepForPostStep(pStep);
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// Copying what the base class does would instead
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// - also not useful
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// return G4VParticleChange::UpdateStepInfo(pStep);
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return pStep;
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}
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//----------------------------------------------------------------
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// methods for printing messages
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//
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void G4ParticleChangeForTransport::DumpInfo() const
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{
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// use base-class DumpInfo
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G4ParticleChange::DumpInfo();
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G4int oldprc = G4cout.precision(3);
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G4cout << " Touchable (pointer) : "
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<< std::setw(20) << theTouchableHandle() << G4endl;
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G4cout.precision(oldprc);
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}
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