LArSoft  v06_85_00
Liquid Argon Software toolkit - http://larsoft.org/
errprop.cc
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25 //
26 // $Id: errprop.cc 84599 2014-10-17 07:42:42Z gcosmo $
27 //
30 //
31 // ------------------------------------------------------------
32 // GEANT 4 example main
33 // ------------------------------------------------------------
34 //
35 // History:
36 // - Created: P. Arce May 2007
37 //
38 
39 #include "ExErrorDetectorConstruction.hh"
40 #include "G4SteppingVerbose.hh"
41 
42 #include "G4ErrorPropagator.hh"
43 #include "G4ErrorPropagatorData.hh"
44 #include "G4ErrorPropagatorManager.hh"
45 #include "G4ErrorPlaneSurfaceTarget.hh"
46 #include "G4ErrorCylSurfaceTarget.hh"
47 #include "G4ErrorGeomVolumeTarget.hh"
48 #include "G4ErrorTrackLengthTarget.hh"
49 #include "G4ErrorFreeTrajState.hh"
50 
51 #include "G4UImanager.hh"
52 #include "G4SystemOfUnits.hh"
53 
54 void Initialize();
55 G4ErrorTarget* BuildTarget( G4int iTarget );
56 void ProcessEvent( G4int iProp, size_t nEv );
57 void Finalize();
58 
59 G4ErrorTarget* theTarget;
60 G4ErrorMode theG4ErrorMode;
61 
62 //-------------------------------------------------------------
63 int main()
64 {
65 
66  Initialize();
67 
68  //----- Choose propagation mode
69  // 0: propagate until target, all steps in one go
70  // 1: propagate until target, returning control to the user at each step
71  G4int iProp = 0;
72  char* prop = getenv("G4ERROR_PROP");
73  if( prop ) {
74  if( G4String(prop) == G4String("UNTIL_TARGET") ){
75  iProp = 0;
76  } else if ( G4String(prop) == G4String("STEP_BY_STEP") ) {
77  iProp = 1;
78  } else {
79  G4Exception("exG4eReco","Fatal error in Argument",
80  FatalErrorInArgument,
81  G4String("Variable G4ERROR_PROP = " + G4String(prop) +
82  " It must be: UNTIL_TARGET or STEP_BY_STEP").c_str());
83  }
84  } else {
85  G4Exception("exG4eReco","Fatal error in Argument",
86  JustWarning,
87  "Variable G4ERROR_PROP not defined, taking it = UNTIL_TARGET");
88  }
89 
90  size_t nEvents = 3;
91  for( size_t ii = 0; ii < nEvents; ii++ ){
92  ProcessEvent( iProp, ii );
93  }
94 
95  Finalize();
96 
97 }
98 
99 
100 //-------------------------------------------------------------
101 void Initialize()
102 {
103  G4VSteppingVerbose::SetInstance(new G4SteppingVerbose);
104 
105  // Initialize the GEANT4e manager
106  G4ErrorPropagatorManager* g4emgr
107  = G4ErrorPropagatorManager::GetErrorPropagatorManager();
108  G4ErrorPropagatorData* g4edata
109  = G4ErrorPropagatorData::GetErrorPropagatorData();
110 
111  g4emgr->SetUserInitialization(new ExErrorDetectorConstruction);
112 
113  G4UImanager::GetUIpointer()->ApplyCommand("/exerror/setField -10. kilogauss");
114 
115  g4emgr->InitGeant4e();
116 
117  G4UImanager::GetUIpointer()->ApplyCommand("/control/verbose 1");
118  G4UImanager::GetUIpointer()->ApplyCommand("/tracking/verbose 1");
119  G4UImanager::GetUIpointer()->ApplyCommand("/geant4e/limits/stepLength 100 mm");
120 
121  //----- Choose target type:
122  // 1: PlaneSurfaceTarget
123  // 2: CylSurfaceTarget
124  // 3: GeomVolumeTarget
125  // 4: TrackLengthTarget
126  G4int iTarget = 1;
127  char* target = getenv("G4ERROR_TARGET");
128  if( target ) {
129  if( G4String(target) == G4String("PLANE_SURFACE") ) {
130  iTarget = 1;
131  }else if( G4String(target) == G4String("CYL_SURFACE") ) {
132  iTarget = 2;
133  }else if( G4String(target) == G4String("VOLUME") ) {
134  iTarget = 3;
135  }else if( G4String(target) == G4String("TRKLEN") ) {
136  iTarget = 4;
137  }else {
138  G4Exception("exG4eReco","Fatal error in Argument",
139  FatalErrorInArgument,
140  G4String("Variable G4ERROR_TARGET = " + G4String(target) +
141  " It must be: PLANE_SURFACE, CYL_SURFACE, VOLUME, TRKLEN").c_str());
142  }
143  } else {
144  G4Exception("exG4eReco","Fatal error in Argument",
145  JustWarning,"Variable G4ERROR_TARGET not defined, taking it = PLANE_SURFACE");
146  }
147 
148  theTarget = BuildTarget( iTarget );
149  g4edata->SetTarget( theTarget );
150 
151  theG4ErrorMode = G4ErrorMode_PropBackwards;
152  char* mode = getenv("G4ERROR_MODE");
153  if( mode ) {
154  if( G4String(mode) == G4String("FORWARDS") ) {
155  theG4ErrorMode = G4ErrorMode_PropForwards;
156  } else if( G4String(mode) == G4String("BACKWARDS") ) {
157  theG4ErrorMode = G4ErrorMode_PropBackwards;
158  } else {
159  G4Exception("exG4eReco","Fatal error in Argument",
160  FatalErrorInArgument,
161  G4String("Variable G4ERROR_MODE = " + G4String(mode) +
162  " It must be: FORWARDS or BACKWARDS").c_str());
163  }
164  } else {
165  G4Exception("exG4eReco","Fatal error in Argument",
166  JustWarning,"Variable G4ERROR_MODE not defined, taking it = BACKWARDS");
167  }
168 
169 }
170 
171 
172 void ProcessEvent( G4int iProp, size_t )
173 {
174 
175 // Set the starting trajectory.
176  G4ThreeVector xv3( 0, 0, 0 );
177  G4ThreeVector pv3( 20.0*GeV, 0.0, 0.0 );
178  G4ErrorTrajErr error( 5, 0 );
179  G4ErrorFreeTrajState* g4ErrorTrajState
180  = new G4ErrorFreeTrajState( "mu-", xv3, pv3, error );
181 
182  G4ErrorPropagatorManager* g4emgr
183  = G4ErrorPropagatorManager::GetErrorPropagatorManager();
184 
185  //int ierr = 0;
186 
187  G4Point3D surfPos(224.*cm,0.,0.);
188  G4Normal3D surfNorm(1.,0.,0.);
189  //- G4ErrorTarget* theG4ErrorTarget
190  // = new G4ErrorPlaneSurfaceTarget(surfNorm, surfPos );
191 
192  if( iProp == 0){
193  // Propagate until G4ErrorTarget is found all in one go
194  //ierr =
195  g4emgr->Propagate( g4ErrorTrajState, theTarget, theG4ErrorMode );
196  } else if( iProp == 1){
197 
198  // Propagate until G4ErrorTarget is reached step by step
199 
200  g4emgr->InitTrackPropagation();
201 
202  // G4Track* aTrack
203  // = G4EventManager::GetEventManager()->GetTrackingManager()->GetTrack();
204  bool moreEvt = TRUE;
205  while( moreEvt ){
206 
207  //ierr =
208  g4emgr->PropagateOneStep( g4ErrorTrajState, theG4ErrorMode );
209 
210  //---- Check if target is reached
211  if( g4emgr->GetPropagator()->CheckIfLastStep( g4ErrorTrajState->GetG4Track() )) {
212  g4emgr->GetPropagator()
213  ->InvokePostUserTrackingAction( g4ErrorTrajState->GetG4Track() );
214  moreEvt = 0;
215  G4cout << "STEP_BY_STEP propagation: Last Step " << G4endl;
216  }
217  }
218  }
219 
220  G4cout << " $$$ PROPAGATION ENDED " << G4endl;
221  // extract current state info
222  G4Point3D posEnd = g4ErrorTrajState->GetPosition();
223  G4Normal3D momEnd = g4ErrorTrajState->GetMomentum();
224  G4ErrorTrajErr errorEnd = g4ErrorTrajState->GetError();
225 
226  G4cout << " Position: " << posEnd << G4endl
227  << " Momentum: " << momEnd << G4endl
228  << " Error: " << errorEnd << G4endl;
229 }
230 
231 
232 //-------------------------------------------------------------
233 G4ErrorTarget* BuildTarget( G4int iTarget )
234 {
235 
236  G4ErrorTarget* target = 0;
237  if( iTarget == 1 ) {
238  G4Point3D surfPos(221.*cm,0.,0.);
239  G4Normal3D surfNorm(1.,0.,0.);
240  target = new G4ErrorPlaneSurfaceTarget(surfNorm, surfPos );
241  }else if( iTarget == 2 ) {
242  G4double radius = 222*cm;
243  target = new G4ErrorCylSurfaceTarget(radius);
244  }else if( iTarget == 3 ) {
245  target = new G4ErrorGeomVolumeTarget("MUON");
246  }else if( iTarget == 4 ) {
247  target = new G4ErrorTrackLengthTarget(223.*cm);
248  }else {
249  G4Exception("exG4eReco","Fatal error in Argument",
250  FatalErrorInArgument,"Target type has to be between 1 and 4");
251  }
252  return target;
253 }
254 
255 
256 //-------------------------------------------------------------
257 void Finalize()
258 {
259  G4ErrorPropagatorManager::GetErrorPropagatorManager()->CloseGeometry();
260 
261 }
int main()
Definition: errprop.cc:63
cout<< "-> Edep in the target
Definition: analysis.C:54
void Initialize()
Definition: errprop.cc:101
void ProcessEvent(G4int iProp, size_t nEv)
Definition: errprop.cc:172
G4ErrorMode theG4ErrorMode
Definition: errprop.cc:60
G4ErrorTarget * theTarget
Definition: errprop.cc:59
Double_t radius
G4ErrorTarget * BuildTarget(G4int iTarget)
Definition: errprop.cc:233
void Finalize()
Definition: errprop.cc:257