[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: G4BlineTracer.cc,v 1.3 2006/06/29 17:15:16 gunter Exp $ |
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| 28 | // GEANT4 tag $Name: $ |
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| 29 | // |
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| 30 | // |
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| 31 | // -------------------------------------------------------------------- |
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| 32 | // |
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| 33 | // G4BlineTracer implementation |
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| 34 | // |
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| 35 | // -------------------------------------------------------------------- |
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| 36 | // Author: Laurent Desorgher (desorgher@phim.unibe.ch) |
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| 37 | // Created - 2003-10-06 |
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| 38 | // -------------------------------------------------------------------- |
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| 39 | |
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| 40 | #include "G4BlineTracer.hh" |
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| 41 | #include "G4BlineTracerMessenger.hh" |
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| 42 | #include "G4BlinePrimaryGeneratorAction.hh" |
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| 43 | #include "G4BlineEventAction.hh" |
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| 44 | #include "G4BlineSteppingAction.hh" |
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| 45 | #include "G4BlineEquation.hh" |
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| 46 | |
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| 47 | #include "G4RunManager.hh" |
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| 48 | #include "G4TransportationManager.hh" |
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| 49 | #include "G4FieldManager.hh" |
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| 50 | #include "G4PropagatorInField.hh" |
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| 51 | #include "G4CashKarpRKF45.hh" |
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| 52 | #include "G4LogicalVolumeStore.hh" |
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| 53 | #include "G4ChordFinder.hh" |
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| 54 | |
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| 55 | ////////////////////////////////////////////////////////////////// |
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| 56 | |
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| 57 | G4BlineTracer::G4BlineTracer() |
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| 58 | { |
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| 59 | fMessenger = new G4BlineTracerMessenger(this); |
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| 60 | fSteppingAction = new G4BlineSteppingAction(this) ; |
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| 61 | fEventAction = new G4BlineEventAction(this); |
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| 62 | fPrimaryGeneratorAction = new G4BlinePrimaryGeneratorAction(); |
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| 63 | MaxTrackingStep =1000.*m; |
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| 64 | was_ResetChordFinders_already_called=false; |
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| 65 | } |
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| 66 | |
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| 67 | /////////////////////////////////////////////////////////////////////// |
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| 68 | |
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| 69 | G4BlineTracer::~G4BlineTracer() |
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| 70 | { |
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| 71 | delete fMessenger; |
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| 72 | delete fSteppingAction; |
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| 73 | delete fEventAction; |
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| 74 | delete fPrimaryGeneratorAction; |
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| 75 | for (size_t i=0; i< vecEquationOfMotion.size();i++) |
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| 76 | { |
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| 77 | if (vecEquationOfMotion[i]) delete vecEquationOfMotion[i]; |
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| 78 | if (vecChordFinders[i]) delete vecChordFinders[i]; |
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| 79 | } |
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| 80 | } |
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| 81 | |
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| 82 | //////////////////////////////////////////////////////////////////// |
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| 83 | |
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| 84 | void G4BlineTracer::BeginOfRunAction(const G4Run*) |
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| 85 | { |
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| 86 | } |
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| 87 | |
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| 88 | /////////////////////////////////////////////////////////////////////// |
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| 89 | |
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| 90 | void G4BlineTracer::EndOfRunAction(const G4Run*) |
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| 91 | { |
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| 92 | } |
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| 93 | |
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| 94 | //////////////////////////////////////////////////////////////// |
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| 95 | |
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| 96 | void G4BlineTracer::ComputeBlines(G4int n_of_lines) |
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| 97 | { |
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| 98 | //the first time ResetChordFinders should be called |
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| 99 | // |
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| 100 | if (!was_ResetChordFinders_already_called) |
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| 101 | { |
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| 102 | ResetChordFinders(); |
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| 103 | was_ResetChordFinders_already_called=true; |
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| 104 | } |
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| 105 | |
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| 106 | // Replace the user action by the ad-hoc actions for Blines |
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| 107 | |
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| 108 | G4RunManager* theRunManager = G4RunManager::GetRunManager(); |
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| 109 | G4UserRunAction* user_run_action = |
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| 110 | (G4UserRunAction*)theRunManager->GetUserRunAction(); |
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| 111 | theRunManager->SetUserAction(this); |
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| 112 | |
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| 113 | G4UserSteppingAction* user_stepping_action = |
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| 114 | (G4UserSteppingAction*)theRunManager->GetUserSteppingAction(); |
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| 115 | theRunManager->SetUserAction(fSteppingAction); |
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| 116 | |
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| 117 | G4VUserPrimaryGeneratorAction* fUserPrimaryAction = |
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| 118 | (G4VUserPrimaryGeneratorAction*)theRunManager->GetUserPrimaryGeneratorAction(); |
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| 119 | if (fUserPrimaryAction) |
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| 120 | fPrimaryGeneratorAction->SetUserPrimaryAction(fUserPrimaryAction); |
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| 121 | theRunManager->SetUserAction(fPrimaryGeneratorAction); |
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| 122 | |
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| 123 | G4UserEventAction* user_event_action = |
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| 124 | (G4UserEventAction*)theRunManager->GetUserEventAction(); |
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| 125 | theRunManager->SetUserAction(fEventAction); |
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| 126 | |
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| 127 | G4UserTrackingAction* user_tracking_action = |
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| 128 | (G4UserTrackingAction*)theRunManager->GetUserTrackingAction(); |
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| 129 | G4UserTrackingAction* aNullTrackingAction = 0; |
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| 130 | theRunManager->SetUserAction(aNullTrackingAction); |
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| 131 | |
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| 132 | G4UserStackingAction* user_stacking_action = |
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| 133 | (G4UserStackingAction*)theRunManager->GetUserStackingAction(); |
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| 134 | G4UserStackingAction* aNullStackingAction = 0; |
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| 135 | theRunManager->SetUserAction(aNullStackingAction); |
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| 136 | |
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| 137 | // replace the user defined chordfinder by the element of vecChordFinders |
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| 138 | |
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| 139 | std::vector<G4ChordFinder*> user_chord_finders; |
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| 140 | std::vector<G4double> user_largest_acceptable_step; |
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| 141 | for (size_t i=0;i<vecChordFinders.size();i++) |
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| 142 | { |
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| 143 | user_largest_acceptable_step.push_back(-1.); |
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| 144 | if (vecChordFinders[i]) |
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| 145 | { |
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| 146 | user_chord_finders.push_back(vecFieldManagers[i]->GetChordFinder()); |
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| 147 | vecChordFinders[i]->SetDeltaChord(user_chord_finders[i]->GetDeltaChord()); |
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| 148 | vecFieldManagers[i]->SetChordFinder(vecChordFinders[i]); |
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| 149 | } |
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| 150 | else user_chord_finders.push_back(0); |
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| 151 | } |
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| 152 | |
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| 153 | // I have tried to use the smooth line filter ability but I could not obtain |
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| 154 | // a smooth trajectory in the G4TrajectoryContainer after an event |
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| 155 | // Another solution for obtaining a smooth trajectory is to limit |
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| 156 | // the LargestAcceptableStep in the G4PropagatorInField object. |
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| 157 | // This is the solution I used. |
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| 158 | |
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| 159 | // Old solution: |
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| 160 | // G4TransportationManager::GetTransportationManager() |
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| 161 | // ->GetPropagatorInField()->SetTrajectoryFilter(fTrajectoryFilter); |
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| 162 | |
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| 163 | // New solution: |
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| 164 | // set the largest_acceptable_step to max_step:length |
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| 165 | |
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| 166 | G4TransportationManager* tmanager = |
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| 167 | G4TransportationManager::GetTransportationManager(); |
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| 168 | G4double previous_largest_acceptable_step = |
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| 169 | tmanager->GetPropagatorInField()->GetLargestAcceptableStep(); |
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| 170 | |
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| 171 | tmanager->GetPropagatorInField() |
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| 172 | ->SetLargestAcceptableStep(MaxTrackingStep); |
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| 173 | |
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| 174 | // Start the integration of n_of_lines different magnetic field lines |
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| 175 | |
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| 176 | for (G4int i=0; i<n_of_lines;i++) |
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| 177 | { |
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| 178 | // for each magnetic field line we integrate once backward and once |
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| 179 | // forward from the same starting point |
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| 180 | |
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| 181 | // backward integration |
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| 182 | |
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| 183 | for (size_t i=0; i< vecEquationOfMotion.size();i++) |
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| 184 | { |
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| 185 | if (vecEquationOfMotion[i]) |
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| 186 | vecEquationOfMotion[i]->SetBackwardDirectionOfIntegration(true); |
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| 187 | } |
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| 188 | theRunManager->BeamOn(1); |
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| 189 | |
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| 190 | // forward integration |
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| 191 | |
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| 192 | for (size_t i=0; i < vecEquationOfMotion.size();i++) |
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| 193 | { |
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| 194 | if (vecEquationOfMotion[i]) |
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| 195 | vecEquationOfMotion[i]->SetBackwardDirectionOfIntegration(false); |
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| 196 | } |
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| 197 | theRunManager->BeamOn(1); |
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| 198 | } |
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| 199 | |
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| 200 | // Remove trajectory filter to PropagatorInField |
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| 201 | // It was for old solution when using smooth trajectory filter |
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| 202 | |
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| 203 | // tmanager->GetPropagatorInField()->SetTrajectoryFilter(0); |
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| 204 | |
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| 205 | // back to User defined actions and other parameters |
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| 206 | // ------------------------------------------------- |
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| 207 | |
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| 208 | tmanager->GetPropagatorInField() |
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| 209 | ->SetLargestAcceptableStep(previous_largest_acceptable_step); |
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| 210 | |
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| 211 | // return to User actions |
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| 212 | |
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| 213 | theRunManager->SetUserAction(user_run_action); |
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| 214 | theRunManager->SetUserAction(user_event_action); |
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| 215 | theRunManager->SetUserAction(fUserPrimaryAction); |
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| 216 | theRunManager->SetUserAction(user_stepping_action); |
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| 217 | theRunManager->SetUserAction(user_tracking_action); |
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| 218 | theRunManager->SetUserAction(user_stacking_action); |
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| 219 | |
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| 220 | // set user defined chord finders and largest acceptable step |
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| 221 | |
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| 222 | for (size_t i=0;i<vecFieldManagers.size();i++) |
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| 223 | { |
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| 224 | if (user_chord_finders[i]) |
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| 225 | vecFieldManagers[i]->SetChordFinder(user_chord_finders[i]); |
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| 226 | } |
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| 227 | } |
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| 228 | |
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| 229 | //////////////////////////////////////////////////////////////// |
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| 230 | |
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| 231 | /* |
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| 232 | G4bool G4BlineTracer::CheckMagneticFields() |
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| 233 | { |
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| 234 | // Check FieldManagers |
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| 235 | |
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| 236 | G4TransportationManager* tmanager = |
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| 237 | G4TransportationManager::GetTransportationManager(); |
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| 238 | |
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| 239 | if (vecFieldManagers[0] != tmanager->GetFieldManager()) |
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| 240 | return false; |
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| 241 | if (vecMagneticFields[0] != tmanager->GetFieldManager()->GetDetectorField()) |
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| 242 | return false; |
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| 243 | G4LogicalVolumeStore* theVolumeStore = G4LogicalVolumeStore::GetInstance(); |
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| 244 | |
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| 245 | std::vector<G4FieldManagers*> LogicalVolumeFields; |
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| 246 | size_t j=0; |
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| 247 | for (size_t i=0; i<theVolumeStore.size();i++) |
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| 248 | { |
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| 249 | if (theVolumeStore[i]->GetFieldManager()) |
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| 250 | { |
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| 251 | j++; |
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| 252 | if (j >= vecFieldManagers.size()) return false; |
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| 253 | if (vecFieldManagers[j] != theVolumeStore[i]->GetFieldManager()) |
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| 254 | return false; |
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| 255 | if (vecMagneticFields[j] != |
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| 256 | theVolumeStore[i]->GetFieldManager()->GetDetectorField()) |
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| 257 | return false; |
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| 258 | } |
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| 259 | } |
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| 260 | if (j<vecFieldManagers.size()) return false; |
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| 261 | |
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| 262 | return true; |
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| 263 | } |
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| 264 | */ |
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| 265 | |
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| 266 | //////////////////////////////////////////////////////////////// |
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| 267 | |
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| 268 | void G4BlineTracer::ResetChordFinders() |
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| 269 | { |
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| 270 | for (size_t i=0; i<vecEquationOfMotion.size();i++) |
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| 271 | { |
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| 272 | delete vecEquationOfMotion[i]; |
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| 273 | delete vecChordFinders[i]; |
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| 274 | } |
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| 275 | |
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| 276 | vecChordFinders.clear(); |
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| 277 | vecFieldManagers.clear(); |
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| 278 | vecMagneticFields.clear(); |
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| 279 | vecEquationOfMotion.clear(); |
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| 280 | |
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| 281 | // global field |
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| 282 | |
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| 283 | vecChordFinders.push_back(0); |
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| 284 | vecMagneticFields.push_back(0); |
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| 285 | vecEquationOfMotion.push_back(0); |
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| 286 | vecFieldManagers.push_back(G4TransportationManager::GetTransportationManager() |
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| 287 | ->GetFieldManager()); |
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| 288 | if (vecFieldManagers[0]) |
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| 289 | { |
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| 290 | vecMagneticFields[0] = |
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| 291 | (G4MagneticField*) vecFieldManagers[0]->GetDetectorField(); |
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| 292 | if (vecMagneticFields[0]) |
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| 293 | { |
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| 294 | vecEquationOfMotion[0] = new G4BlineEquation(vecMagneticFields[0]); |
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| 295 | G4CashKarpRKF45* pStepper = new G4CashKarpRKF45(vecEquationOfMotion[0]); |
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| 296 | G4MagInt_Driver* pIntgrDriver = |
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| 297 | new G4MagInt_Driver(0.01*mm,pStepper,pStepper->GetNumberOfVariables()); |
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| 298 | vecChordFinders[0] = new G4ChordFinder(pIntgrDriver); |
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| 299 | } |
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| 300 | } |
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| 301 | |
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| 302 | // local fields |
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| 303 | |
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| 304 | G4LogicalVolumeStore* theVolumeStore = G4LogicalVolumeStore::GetInstance(); |
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| 305 | |
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| 306 | size_t j=0; |
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| 307 | for (size_t i=0; i<theVolumeStore->size();i++) |
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| 308 | { |
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| 309 | if ((*theVolumeStore)[i]->GetFieldManager()) |
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| 310 | { |
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| 311 | j++; |
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| 312 | vecFieldManagers.push_back(((*theVolumeStore)[i])->GetFieldManager()); |
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| 313 | vecMagneticFields.push_back((G4MagneticField*) |
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| 314 | vecFieldManagers[j]->GetDetectorField()); |
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| 315 | vecEquationOfMotion.push_back(0); |
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| 316 | vecChordFinders.push_back(0); |
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| 317 | if (vecMagneticFields[j]) |
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| 318 | { |
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| 319 | vecEquationOfMotion[j]= new G4BlineEquation(vecMagneticFields[j]); |
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| 320 | G4CashKarpRKF45* pStepper = new G4CashKarpRKF45(vecEquationOfMotion[j]); |
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| 321 | G4MagInt_Driver* pIntgrDriver = |
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| 322 | new G4MagInt_Driver(.01*mm,pStepper,pStepper->GetNumberOfVariables()); |
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| 323 | vecChordFinders[j] = new G4ChordFinder(pIntgrDriver); |
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| 324 | } |
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| 325 | } |
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| 326 | } |
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| 327 | } |
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