Gabriele Cosmo
110 lines
3.8 KiB
C++
110 lines
3.8 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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//
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// ----------------------------------------------------------------------
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// GEANT 4 class source file
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//
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// G4SamplingPostStepAction.cc
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//
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// ----------------------------------------------------------------------
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#include "G4SamplingPostStepAction.hh"
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#include "G4Track.hh"
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#include "G4ParticleChange.hh"
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#include "G4VImportanceSplitExaminer.hh"
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#include "G4Nsplit_Weight.hh"
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#include "G4VTrackTerminator.hh"
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#include <sstream>
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G4SamplingPostStepAction::
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G4SamplingPostStepAction(const G4VTrackTerminator &TrackTerminator)
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: fTrackTerminator(TrackTerminator)
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{
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}
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G4SamplingPostStepAction::~G4SamplingPostStepAction()
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{
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}
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void G4SamplingPostStepAction::DoIt(const G4Track& aTrack,
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G4ParticleChange *aParticleChange,
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const G4Nsplit_Weight &nw)
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{
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// evaluate results from sampler
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if (nw.fN>1)
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{
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// split track
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Split(aTrack, nw, aParticleChange);
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}
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else if (nw.fN==1)
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{
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// don't split, but weight may be changed !
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aParticleChange->ProposeWeight(nw.fW);
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}
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else if (nw.fN==0)
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{
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// kill track
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fTrackTerminator.KillTrack();
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}
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else
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{
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// wrong answer
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std::ostringstream os;
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os << "Sampler returned nw = "
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<< nw
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<< "\n";
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G4String msg = os.str();
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G4Exception("G4SamplingPostStepAction::DoIt()",
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"InvalidCondition", FatalException, msg);
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}
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}
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void G4SamplingPostStepAction::Split(const G4Track &aTrack,
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const G4Nsplit_Weight &nw,
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G4ParticleChange *aParticleChange)
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{
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aParticleChange->ProposeWeight(nw.fW);
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aParticleChange->SetNumberOfSecondaries(nw.fN-1);
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for (G4int i=1;i<nw.fN;i++)
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{
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G4Track *ptrack = new G4Track(aTrack);
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// ptrack->SetCreatorProcess(aTrack.GetCreatorProcess());
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ptrack->SetWeight(nw.fW);
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if (ptrack->GetMomentumDirection() != aTrack.GetMomentumDirection())
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{
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G4Exception("G4SamplingPostStepAction::Split()", "InvalidCondition",
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FatalException, "Track with same momentum !");
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}
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aParticleChange->AddSecondary(ptrack);
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}
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return;
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}
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