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G4BlineTracer.cc
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30 // $Id: G4BlineTracer.cc 77941 2013-11-29 15:22:58Z gcosmo $
31 //
32 //
33 // --------------------------------------------------------------------
34 //
35 // G4BlineTracer implementation
36 //
37 // --------------------------------------------------------------------
38 // Author: Laurent Desorgher (desorgher@phim.unibe.ch)
39 // Created - 2003-10-06
40 // --------------------------------------------------------------------
41 
42 #include "G4BlineTracer.hh"
45 #include "G4BlineEventAction.hh"
46 #include "G4BlineSteppingAction.hh"
47 #include "G4BlineEquation.hh"
48 
49 #include "G4RunManager.hh"
51 #include "G4FieldManager.hh"
52 #include "G4PropagatorInField.hh"
53 #include "G4CashKarpRKF45.hh"
54 #include "G4LogicalVolumeStore.hh"
55 #include "G4ChordFinder.hh"
56 #include "G4SystemOfUnits.hh"
57 
59 
61 {
62  fMessenger = new G4BlineTracerMessenger(this);
63  fSteppingAction = new G4BlineSteppingAction(this) ;
64  fEventAction = new G4BlineEventAction(this);
65  fPrimaryGeneratorAction = new G4BlinePrimaryGeneratorAction();
66  fMaxTrackingStep =1000.*m;
67  fWas_ResetChordFinders_already_called=false;
68 }
69 
71 
73 {
74  delete fMessenger;
75  delete fSteppingAction;
76  delete fEventAction;
77  delete fPrimaryGeneratorAction;
78  for (size_t i=0; i< fVecEquationOfMotion.size();i++)
79  {
80  if (fVecEquationOfMotion[i]) delete fVecEquationOfMotion[i];
81  if (fVecChordFinders[i]) delete fVecChordFinders[i];
82  }
83 }
84 
86 
88 {
89 }
90 
92 
94 {
95 }
96 
98 
100 {
101  //the first time ResetChordFinders should be called
102  //
103  if (!fWas_ResetChordFinders_already_called)
104  {
105  ResetChordFinders();
106  fWas_ResetChordFinders_already_called=true;
107  }
108 
109  // Replace the user action by the ad-hoc actions for Blines
110 
111  G4RunManager* theRunManager = G4RunManager::GetRunManager();
112  G4UserRunAction* user_run_action =
113  (G4UserRunAction*)theRunManager->GetUserRunAction();
114  theRunManager->SetUserAction(this);
115 
116  G4UserSteppingAction* user_stepping_action =
117  (G4UserSteppingAction*)theRunManager->GetUserSteppingAction();
118  theRunManager->SetUserAction(fSteppingAction);
119 
120  G4VUserPrimaryGeneratorAction* userPrimaryAction =
122  if (userPrimaryAction)
123  fPrimaryGeneratorAction->SetUserPrimaryAction(userPrimaryAction);
124  theRunManager->SetUserAction(fPrimaryGeneratorAction);
125 
126  G4UserEventAction* user_event_action =
127  (G4UserEventAction*)theRunManager->GetUserEventAction();
128  theRunManager->SetUserAction(fEventAction);
129 
130  G4UserTrackingAction* user_tracking_action =
131  (G4UserTrackingAction*)theRunManager->GetUserTrackingAction();
132  G4UserTrackingAction* aNullTrackingAction = 0;
133  theRunManager->SetUserAction(aNullTrackingAction);
134 
135  G4UserStackingAction* user_stacking_action =
136  (G4UserStackingAction*)theRunManager->GetUserStackingAction();
137  G4UserStackingAction* aNullStackingAction = 0;
138  theRunManager->SetUserAction(aNullStackingAction);
139 
140  // replace the user defined chordfinder by the element of fVecChordFinders
141 
142  std::vector<G4ChordFinder*> user_chord_finders;
143  std::vector<G4double> user_largest_acceptable_step;
144  for (size_t i=0;i<fVecChordFinders.size();i++)
145  {
146  user_largest_acceptable_step.push_back(-1.);
147  if (fVecChordFinders[i])
148  {
149  user_chord_finders.push_back(fVecFieldManagers[i]->GetChordFinder());
150  fVecChordFinders[i]->SetDeltaChord(user_chord_finders[i]->GetDeltaChord());
151  fVecFieldManagers[i]->SetChordFinder(fVecChordFinders[i]);
152  }
153  else user_chord_finders.push_back(0);
154  }
155 
156  // I have tried to use the smooth line filter ability but I could not obtain
157  // a smooth trajectory in the G4TrajectoryContainer after an event
158  // Another solution for obtaining a smooth trajectory is to limit
159  // the LargestAcceptableStep in the G4PropagatorInField object.
160  // This is the solution I used.
161 
162  // Old solution:
163  // G4TransportationManager::GetTransportationManager()
164  // ->GetPropagatorInField()->SetTrajectoryFilter(fTrajectoryFilter);
165 
166  // New solution:
167  // set the largest_acceptable_step to max_step:length
168 
169  G4TransportationManager* tmanager =
171  G4double previous_largest_acceptable_step =
173 
174  tmanager->GetPropagatorInField()
175  ->SetLargestAcceptableStep(fMaxTrackingStep);
176 
177  // Start the integration of n_of_lines different magnetic field lines
178 
179  for (G4int il=0; il<n_of_lines;il++)
180  {
181  // for each magnetic field line we integrate once backward and once
182  // forward from the same starting point
183 
184  // backward integration
185 
186  for (size_t i=0; i< fVecEquationOfMotion.size();i++)
187  {
188  if (fVecEquationOfMotion[i])
189  fVecEquationOfMotion[i]->SetBackwardDirectionOfIntegration(true);
190  }
191  theRunManager->BeamOn(1);
192 
193  // forward integration
194 
195  for (size_t i=0; i < fVecEquationOfMotion.size();i++)
196  {
197  if (fVecEquationOfMotion[i])
198  fVecEquationOfMotion[i]->SetBackwardDirectionOfIntegration(false);
199  }
200  theRunManager->BeamOn(1);
201  }
202 
203  // Remove trajectory filter to PropagatorInField
204  // It was for old solution when using smooth trajectory filter
205 
206  // tmanager->GetPropagatorInField()->SetTrajectoryFilter(0);
207 
208  // back to User defined actions and other parameters
209  // -------------------------------------------------
210 
211  tmanager->GetPropagatorInField()
212  ->SetLargestAcceptableStep(previous_largest_acceptable_step);
213 
214  // return to User actions
215 
216  theRunManager->SetUserAction(user_run_action);
217  theRunManager->SetUserAction(user_event_action);
218  theRunManager->SetUserAction(userPrimaryAction);
219  theRunManager->SetUserAction(user_stepping_action);
220  theRunManager->SetUserAction(user_tracking_action);
221  theRunManager->SetUserAction(user_stacking_action);
222 
223  // set user defined chord finders and largest acceptable step
224 
225  for (size_t i=0;i<fVecFieldManagers.size();i++)
226  {
227  if (user_chord_finders[i])
228  fVecFieldManagers[i]->SetChordFinder(user_chord_finders[i]);
229  }
230 }
231 
233 
234 /*
235 G4bool G4BlineTracer::CheckMagneticFields()
236 {
237  // Check FieldManagers
238 
239  G4TransportationManager* tmanager =
240  G4TransportationManager::GetTransportationManager();
241 
242  if (fVecFieldManagers[0] != tmanager->GetFieldManager())
243  return false;
244  if (fVecMagneticFields[0] != tmanager->GetFieldManager()->GetDetectorField())
245  return false;
246  G4LogicalVolumeStore* theVolumeStore = G4LogicalVolumeStore::GetInstance();
247 
248  std::vector<G4FieldManagers*> LogicalVolumeFields;
249  size_t j=0;
250  for (size_t i=0; i<theVolumeStore.size();i++)
251  {
252  if (theVolumeStore[i]->GetFieldManager())
253  {
254  j++;
255  if (j >= fVecFieldManagers.size()) return false;
256  if (fVecFieldManagers[j] != theVolumeStore[i]->GetFieldManager())
257  return false;
258  if (fVecMagneticFields[j] !=
259  theVolumeStore[i]->GetFieldManager()->GetDetectorField())
260  return false;
261  }
262  }
263  if (j<fVecFieldManagers.size()) return false;
264 
265  return true;
266 }
267 */
268 
270 
271 void G4BlineTracer::ResetChordFinders()
272 {
273  for (size_t i=0; i<fVecEquationOfMotion.size();i++)
274  {
275  delete fVecEquationOfMotion[i];
276  delete fVecChordFinders[i];
277  }
278 
279  fVecChordFinders.clear();
280  fVecFieldManagers.clear();
281  fVecMagneticFields.clear();
282  fVecEquationOfMotion.clear();
283 
284  // global field
285 
286  fVecChordFinders.push_back(0);
287  fVecMagneticFields.push_back(0);
288  fVecEquationOfMotion.push_back(0);
289  fVecFieldManagers.push_back(G4TransportationManager::GetTransportationManager()
290  ->GetFieldManager());
291  if (fVecFieldManagers[0])
292  {
293  fVecMagneticFields[0] =
294  (G4MagneticField*) fVecFieldManagers[0]->GetDetectorField();
295  if (fVecMagneticFields[0])
296  {
297  fVecEquationOfMotion[0] = new G4BlineEquation(fVecMagneticFields[0]);
298  G4CashKarpRKF45* pStepper = new G4CashKarpRKF45(fVecEquationOfMotion[0]);
299  G4MagInt_Driver* pIntgrDriver =
300  new G4MagInt_Driver(0.01*mm,pStepper,pStepper->GetNumberOfVariables());
301  fVecChordFinders[0] = new G4ChordFinder(pIntgrDriver);
302  }
303  }
304 
305  // local fields
306 
308 
309  size_t j=0;
310  for (size_t i=0; i<theVolumeStore->size();i++)
311  {
312  if ((*theVolumeStore)[i]->GetFieldManager())
313  {
314  j++;
315  fVecFieldManagers.push_back(((*theVolumeStore)[i])->GetFieldManager());
316  fVecMagneticFields.push_back((G4MagneticField*)
317  fVecFieldManagers[j]->GetDetectorField());
318  fVecEquationOfMotion.push_back(0);
319  fVecChordFinders.push_back(0);
320  if (fVecMagneticFields[j])
321  {
322  fVecEquationOfMotion[j]= new G4BlineEquation(fVecMagneticFields[j]);
323  G4CashKarpRKF45* pStepper = new G4CashKarpRKF45(fVecEquationOfMotion[j]);
324  G4MagInt_Driver* pIntgrDriver =
325  new G4MagInt_Driver(.01*mm,pStepper,pStepper->GetNumberOfVariables());
326  fVecChordFinders[j] = new G4ChordFinder(pIntgrDriver);
327  }
328  }
329  }
330 }
const G4VUserPrimaryGeneratorAction * GetUserPrimaryGeneratorAction() const
static constexpr double mm
Definition: G4SIunits.hh:115
virtual void EndOfRunAction(const G4Run *aRun)
virtual void BeamOn(G4int n_event, const char *macroFile=0, G4int n_select=-1)
Definition of the G4BlineEquation class.
int G4int
Definition: G4Types.hh:78
const G4UserSteppingAction * GetUserSteppingAction() const
G4int GetNumberOfVariables() const
static constexpr double m
Definition: G4SIunits.hh:129
Definition of the G4BlineSteppingAction class.
const G4UserStackingAction * GetUserStackingAction() const
Definition of the G4BlineTracer class.
virtual ~G4BlineTracer()
Definition: G4Run.hh:46
const G4UserEventAction * GetUserEventAction() const
static G4LogicalVolumeStore * GetInstance()
const G4UserTrackingAction * GetUserTrackingAction() const
Definition of the G4BlineTracerMessenger class.
virtual void BeginOfRunAction(const G4Run *aRun)
Definition of the G4BlinePrimaryGeneratorAction class.
void ComputeBlines(G4int nlines)
static G4TransportationManager * GetTransportationManager()
static G4RunManager * GetRunManager()
Definition: G4RunManager.cc:79
void SetUserPrimaryAction(G4VUserPrimaryGeneratorAction *anAction)
Definition of the G4BlineEventAction class.
const G4UserRunAction * GetUserRunAction() const
void SetLargestAcceptableStep(G4double newBigDist)
double G4double
Definition: G4Types.hh:76
G4PropagatorInField * GetPropagatorInField() const
G4double GetLargestAcceptableStep()
virtual void SetUserAction(G4UserRunAction *userAction)