[819] | 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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[960] | 27 | // $Id: G4SamplingPostStepAction.cc,v 1.3 2008/04/21 09:10:29 ahoward Exp $ |
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[1337] | 28 | // GEANT4 tag $Name: geant4-09-04-beta-01 $ |
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[819] | 29 | // |
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| 30 | // ---------------------------------------------------------------------- |
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| 31 | // GEANT 4 class source file |
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| 32 | // |
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| 33 | // G4SamplingPostStepAction.cc |
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| 34 | // |
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| 35 | // ---------------------------------------------------------------------- |
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| 36 | |
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| 37 | #include "G4SamplingPostStepAction.hh" |
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| 38 | #include "G4Track.hh" |
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| 39 | #include "G4ParticleChange.hh" |
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| 40 | #include "G4VImportanceSplitExaminer.hh" |
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| 41 | #include "G4Nsplit_Weight.hh" |
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| 42 | #include "G4VTrackTerminator.hh" |
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| 43 | #include <sstream> |
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| 44 | |
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| 45 | G4SamplingPostStepAction:: |
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| 46 | G4SamplingPostStepAction(const G4VTrackTerminator &TrackTerminator) |
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| 47 | : fTrackTerminator(TrackTerminator) |
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| 48 | { |
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| 49 | } |
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| 50 | |
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| 51 | G4SamplingPostStepAction::~G4SamplingPostStepAction() |
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| 52 | { |
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| 53 | } |
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| 54 | |
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| 55 | void G4SamplingPostStepAction::DoIt(const G4Track& aTrack, |
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| 56 | G4ParticleChange *aParticleChange, |
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| 57 | const G4Nsplit_Weight &nw) |
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| 58 | { |
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| 59 | // evaluate results from sampler |
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| 60 | if (nw.fN>1) |
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| 61 | { |
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| 62 | // split track |
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| 63 | Split(aTrack, nw, aParticleChange); |
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| 64 | } |
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| 65 | else if (nw.fN==1) |
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| 66 | { |
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| 67 | // don't split, but weight may be changed ! |
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| 68 | aParticleChange->ProposeWeight(nw.fW); |
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| 69 | } |
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| 70 | else if (nw.fN==0) |
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| 71 | { |
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| 72 | // kill track |
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| 73 | fTrackTerminator.KillTrack(); |
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| 74 | } |
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| 75 | else |
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| 76 | { |
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| 77 | // wrong answer |
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| 78 | std::ostringstream os; |
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| 79 | os << "Sampler returned nw = " |
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| 80 | << nw |
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| 81 | << "\n"; |
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| 82 | G4String m = os.str(); |
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| 83 | |
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| 84 | G4Exception("G4SamplingPostStepAction::DoIt()", |
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| 85 | "InvalidCondition", FatalException, m); |
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| 86 | } |
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| 87 | } |
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| 88 | |
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| 89 | void G4SamplingPostStepAction::Split(const G4Track &aTrack, |
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| 90 | const G4Nsplit_Weight &nw, |
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| 91 | G4ParticleChange *aParticleChange) |
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| 92 | { |
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| 93 | aParticleChange->ProposeWeight(nw.fW); |
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| 94 | aParticleChange->SetNumberOfSecondaries(nw.fN-1); |
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| 95 | |
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| 96 | for (G4int i=1;i<nw.fN;i++) |
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| 97 | { |
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| 98 | G4Track *ptrack = new G4Track(aTrack); |
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| 99 | |
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| 100 | // ptrack->SetCreatorProcess(aTrack.GetCreatorProcess()); |
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| 101 | ptrack->SetWeight(nw.fW); |
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| 102 | |
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| 103 | if (ptrack->GetMomentumDirection() != aTrack.GetMomentumDirection()) |
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| 104 | { |
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| 105 | G4Exception("G4SamplingPostStepAction::Split()", "InvalidCondition", |
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| 106 | FatalException, "Track with same momentum !"); |
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| 107 | } |
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| 108 | aParticleChange->AddSecondary(ptrack); |
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| 109 | } |
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| 110 | return; |
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| 111 | } |
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