[807] | 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: MCTruthManager.cc,v 1.2 2006/12/13 15:42:36 gunter Exp $ |
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[1337] | 28 | // GEANT4 tag $Name: geant4-09-04-beta-01 $ |
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[807] | 29 | // |
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| 30 | // |
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| 31 | // -------------------------------------------------------------- |
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| 32 | // GEANT 4 - MCTruthManager class |
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| 33 | // -------------------------------------------------------------- |
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| 34 | // |
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| 35 | // Author: Witold POKORSKI (Witold.Pokorski@cern.ch) |
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| 36 | // |
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| 37 | // -------------------------------------------------------------- |
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| 38 | |
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| 39 | #include "MCTruthManager.hh" |
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| 40 | |
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| 41 | static MCTruthManager* instance = 0; |
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| 42 | |
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| 43 | MCTruthManager::MCTruthManager() : config(0) |
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| 44 | {} |
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| 45 | |
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| 46 | MCTruthManager::~MCTruthManager() |
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| 47 | {} |
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| 48 | |
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| 49 | MCTruthManager* MCTruthManager::GetInstance() |
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| 50 | { |
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| 51 | if( instance == 0 ) |
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| 52 | { |
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| 53 | instance = new MCTruthManager(); |
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| 54 | } |
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| 55 | return instance; |
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| 56 | } |
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| 57 | |
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| 58 | void MCTruthManager::NewEvent() |
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| 59 | { |
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| 60 | // first delete the old event |
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| 61 | delete event; |
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| 62 | // and now instaciate a new one |
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| 63 | event = new HepMC::GenEvent(); |
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| 64 | } |
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| 65 | |
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| 66 | void MCTruthManager::AddParticle(G4LorentzVector& momentum, |
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| 67 | G4LorentzVector& prodpos, |
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| 68 | G4LorentzVector& endpos, |
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| 69 | G4int pdg_id, G4int partID, G4int motherID, |
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| 70 | G4bool directParent) |
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| 71 | { |
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| 72 | // we create a new particle with barcode = partID |
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| 73 | HepMC::GenParticle* particle = new HepMC::GenParticle(momentum, pdg_id); |
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| 74 | particle->suggest_barcode(partID); |
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| 75 | // we initialize the 'segmentations' map |
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| 76 | // for the moment particle is not 'segmented' |
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| 77 | segmentations[partID] = 1; |
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| 78 | |
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| 79 | // we create the GenVertex corresponding to the end point of the track |
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| 80 | HepMC::GenVertex* endvertex = new HepMC::GenVertex(endpos); |
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| 81 | |
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| 82 | // barcode of the endvertex = - barcode of the track |
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| 83 | endvertex->suggest_barcode(-partID); |
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| 84 | endvertex->add_particle_in(particle); |
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| 85 | event->add_vertex(endvertex); |
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| 86 | |
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| 87 | if(motherID) // not a primary |
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| 88 | { |
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| 89 | // here we could try to improve speed by searching only through particles which |
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| 90 | // belong to the given primary tree |
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| 91 | HepMC::GenParticle* mother = event->barcode_to_particle(motherID); |
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| 92 | // |
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| 93 | if(mother) |
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| 94 | { |
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| 95 | // we first check whether the mother's end vertex corresponds to the particle's |
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| 96 | // production vertex |
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| 97 | HepMC::GenVertex* motherendvtx = mother->end_vertex(); |
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| 98 | G4LorentzVector motherendpos = motherendvtx->position(); |
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| 99 | |
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| 100 | if( motherendpos.x() == prodpos.x() && |
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| 101 | motherendpos.y() == prodpos.y() && |
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| 102 | motherendpos.z() == prodpos.z() ) // if yes, we attach the particle |
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| 103 | { |
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| 104 | motherendvtx->add_particle_out(particle); |
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| 105 | } |
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| 106 | else // if not, we check whether the mother is biological or adopted |
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| 107 | { |
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| 108 | if(!directParent) // adopted |
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| 109 | { |
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| 110 | G4bool found = false; |
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| 111 | |
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| 112 | // first check if any of the dummy particles |
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| 113 | // has the end vertex at the right place |
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| 114 | // |
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| 115 | for(HepMC::GenVertex::particles_out_const_iterator |
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| 116 | it=motherendvtx->particles_out_const_begin(); |
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| 117 | it!=motherendvtx->particles_out_const_end();it++) |
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| 118 | { |
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| 119 | if((*it)->pdg_id()==-999999) |
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| 120 | { |
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| 121 | G4LorentzVector dummypos = (*it)->end_vertex()->position(); |
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| 122 | |
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| 123 | if( dummypos.x() == prodpos.x() && |
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| 124 | dummypos.y() == prodpos.y() && |
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| 125 | dummypos.z() == prodpos.z() ) |
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| 126 | { |
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| 127 | (*it)->end_vertex()->add_particle_out(particle); |
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| 128 | found = true; |
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| 129 | break; |
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| 130 | } |
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| 131 | } |
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| 132 | } |
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| 133 | |
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| 134 | // and if not, create a dummy particle connecting |
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| 135 | // to the end vertex of the mother |
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| 136 | // |
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| 137 | if(!found) |
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| 138 | { |
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| 139 | HepMC::GenVertex* childvtx = new HepMC::GenVertex(prodpos); |
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| 140 | childvtx->add_particle_out(particle); |
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| 141 | |
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| 142 | // the dummy vertex gets the barcode -500000 |
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| 143 | // minus the daughter particle barcode |
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| 144 | // |
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| 145 | childvtx->suggest_barcode(-500000-partID); |
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| 146 | event->add_vertex(childvtx); |
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| 147 | |
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| 148 | HepMC::GenParticle* dummypart = |
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| 149 | new HepMC::GenParticle(G4LorentzVector(),-999999); |
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| 150 | |
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| 151 | // the dummy particle gets the barcode 500000 |
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| 152 | // plus the daughter particle barcode |
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| 153 | // |
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| 154 | dummypart->suggest_barcode(500000+partID); |
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| 155 | childvtx->add_particle_in(dummypart); |
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| 156 | motherendvtx->add_particle_out(dummypart); |
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| 157 | } |
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| 158 | } |
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| 159 | else // biological |
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| 160 | { |
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| 161 | // in case mother was already 'split' we need to look for |
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| 162 | // the right 'segment' to add the new daugther. |
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| 163 | // We use Time coordinate to locate the place for the new vertex |
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| 164 | |
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| 165 | G4int number_of_segments = segmentations[motherID]; |
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| 166 | G4int segment = 0; |
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| 167 | |
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| 168 | // we loop through the segments |
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| 169 | // |
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| 170 | while ( !((mother->end_vertex()->position().t()>prodpos.t()) && |
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| 171 | (mother->production_vertex()->position().t()<prodpos.t())) ) |
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| 172 | { |
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| 173 | segment++; |
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| 174 | if (segment == number_of_segments) |
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| 175 | G4cerr << "Problem!!!! Time coordinates incompatible!" << G4endl; |
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| 176 | |
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| 177 | mother = event->barcode_to_particle(segment*10000000 + motherID); |
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| 178 | } |
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| 179 | |
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| 180 | // now, we 'split' the appropriate 'segment' of the mother particle |
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| 181 | // into two particles and create a new vertex |
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| 182 | // |
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| 183 | HepMC::GenVertex* childvtx = new HepMC::GenVertex(prodpos); |
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| 184 | childvtx->add_particle_out(particle); |
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| 185 | event->add_vertex(childvtx); |
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| 186 | |
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| 187 | // we first detach the mother from its original vertex |
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| 188 | // |
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| 189 | HepMC::GenVertex* orig_mother_end_vtx = mother->end_vertex(); |
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| 190 | orig_mother_end_vtx->remove_particle(mother); |
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| 191 | |
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| 192 | // and attach it to the new vertex |
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| 193 | // |
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| 194 | childvtx->add_particle_in(mother); |
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| 195 | |
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| 196 | // now we create a new particle representing the mother after |
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| 197 | // interaction the barcode of the new particle is 10000000 + the |
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| 198 | // original barcode |
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| 199 | // |
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| 200 | HepMC::GenParticle* mothertwo = new HepMC::GenParticle(*mother); |
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| 201 | mothertwo->suggest_barcode(segmentations[motherID]*10000000 |
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| 202 | + mother->barcode()); |
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| 203 | |
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| 204 | // we also reset the barcodes of the vertices |
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| 205 | // |
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| 206 | orig_mother_end_vtx->suggest_barcode(-segmentations[motherID] |
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| 207 | *10000000 - mother->barcode()); |
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| 208 | childvtx->suggest_barcode(-mother->barcode()); |
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| 209 | |
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| 210 | // we attach it to the new vertex where interaction took place |
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| 211 | // |
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| 212 | childvtx->add_particle_out(mothertwo); |
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| 213 | |
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| 214 | // and we attach it to the original endvertex |
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| 215 | // |
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| 216 | orig_mother_end_vtx->add_particle_in(mothertwo); |
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| 217 | |
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| 218 | // and finally ... the increase the 'segmentation counter' |
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| 219 | // |
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| 220 | segmentations[motherID] = segmentations[motherID]+1; |
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| 221 | } |
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| 222 | } |
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| 223 | } |
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| 224 | else |
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| 225 | // mother GenParticle is not there for some reason... |
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| 226 | // if this happens, we need to revise the philosophy... |
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| 227 | // a solution would be to create HepMC particles |
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| 228 | // at the begining of each track |
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| 229 | { |
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| 230 | G4cerr << "barcode " << motherID << " mother not there! "<< G4endl; |
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| 231 | } |
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| 232 | } |
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| 233 | else // primary |
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| 234 | { |
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| 235 | HepMC::GenVertex* primaryvtx = new HepMC::GenVertex(prodpos); |
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| 236 | primaryvtx->add_particle_out(particle); |
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| 237 | event->add_vertex(primaryvtx); |
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| 238 | |
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| 239 | // add id to the list of primaries |
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| 240 | // |
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| 241 | primarybarcodes.push_back(partID); |
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| 242 | } |
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| 243 | } |
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| 244 | |
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| 245 | void MCTruthManager::PrintEvent() |
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| 246 | { |
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| 247 | event->print(); |
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| 248 | |
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| 249 | // looping over primaries and print the decay tree for each of them |
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| 250 | // |
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| 251 | for(std::vector<int>::const_iterator primarybar=primarybarcodes.begin(); |
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| 252 | primarybar!=primarybarcodes.end();primarybar++) |
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| 253 | { |
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| 254 | printTree(event->barcode_to_particle(*primarybar), " | "); |
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| 255 | } |
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| 256 | } |
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| 257 | |
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| 258 | void MCTruthManager::printTree(HepMC::GenParticle* particle, G4String offset) |
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| 259 | { |
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| 260 | G4cout << offset << "--- barcode: " << particle->barcode() << " pdg: " |
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| 261 | << particle->pdg_id() << " energy: " << particle->momentum().e() |
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| 262 | << " production vertex: "<< particle->production_vertex()->position() |
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| 263 | << G4endl; |
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| 264 | |
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| 265 | for(HepMC::GenVertex::particles_out_const_iterator |
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| 266 | it=particle->end_vertex()->particles_out_const_begin(); |
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| 267 | it!=particle->end_vertex()->particles_out_const_end(); |
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| 268 | it++) |
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| 269 | { |
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| 270 | G4String deltaoffset = ""; |
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| 271 | |
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| 272 | if( std::fmod((*it)->barcode(),10000000) != std::fmod(particle->barcode(),10000000) ) |
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| 273 | { |
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| 274 | deltaoffset = " | "; |
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| 275 | } |
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| 276 | |
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| 277 | printTree((*it), offset + deltaoffset); |
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| 278 | } |
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| 279 | } |
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