Geant4 Cross Reference

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Geant4/geometry/navigation/src/G4PropagatorInField.cc

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Differences between /geometry/navigation/src/G4PropagatorInField.cc (Version 11.3.0) and /geometry/navigation/src/G4PropagatorInField.cc (Version 9.2)


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 25 //                                                 25 //
 26 // class G4PropagatorInField Implementation    <<  26 //
                                                   >>  27 // 
 27 //                                                 28 // 
 28 //  This class implements an algorithm to trac     29 //  This class implements an algorithm to track a particle in a
 29 //  non-uniform magnetic field. It utilises an     30 //  non-uniform magnetic field. It utilises an ODE solver (with
 30 //  the Runge - Kutta method) to evolve the pa     31 //  the Runge - Kutta method) to evolve the particle, and drives it
 31 //  until the particle has traveled a set dist     32 //  until the particle has traveled a set distance or it enters a new 
 32 //  volume.                                        33 //  volume.
 33 //                                                 34 //                                                                     
 34 // 14.10.96 John Apostolakis, design and imple <<  35 // 14.10.96 John Apostolakis,   design and implementation
 35 // 17.03.97 John Apostolakis, renaming new set <<  36 // 17.03.97 John Apostolakis,   renaming new set functions being added
                                                   >>  37 //
 36 // -------------------------------------------     38 // ---------------------------------------------------------------------------
 37                                                    39 
 38 #include <iomanip>                             << 
 39                                                << 
 40 #include "G4PropagatorInField.hh"                  40 #include "G4PropagatorInField.hh"
 41 #include "G4ios.hh"                                41 #include "G4ios.hh"
 42 #include "G4SystemOfUnits.hh"                  <<  42 #include <iomanip>
                                                   >>  43 
 43 #include "G4ThreeVector.hh"                        44 #include "G4ThreeVector.hh"
 44 #include "G4Material.hh"                       << 
 45 #include "G4VPhysicalVolume.hh"                    45 #include "G4VPhysicalVolume.hh"
 46 #include "G4Navigator.hh"                          46 #include "G4Navigator.hh"
 47 #include "G4GeometryTolerance.hh"                  47 #include "G4GeometryTolerance.hh"
 48 #include "G4VCurvedTrajectoryFilter.hh"            48 #include "G4VCurvedTrajectoryFilter.hh"
 49 #include "G4ChordFinder.hh"                        49 #include "G4ChordFinder.hh"
 50 #include "G4MultiLevelLocator.hh"                  50 #include "G4MultiLevelLocator.hh"
 51                                                    51 
 52                                                <<  52 ///////////////////////////////////////////////////////////////////////////
 53 // ------------------------------------------- << 
 54 // Constructors and destructor                 << 
 55 //                                                 53 //
 56 G4PropagatorInField::G4PropagatorInField( G4Na <<  54 // Constructors and destructor
 57                                           G4Fi <<  55 
 58                                           G4VI <<  56 G4PropagatorInField::G4PropagatorInField( G4Navigator    *theNavigator, 
                                                   >>  57                                           G4FieldManager *detectorFieldMgr,
                                                   >>  58                                           G4VIntersectionLocator *vLocator  )
 59   : fDetectorFieldMgr(detectorFieldMgr),           59   : fDetectorFieldMgr(detectorFieldMgr), 
                                                   >>  60     fCurrentFieldMgr(detectorFieldMgr), 
 60     fNavigator(theNavigator),                      61     fNavigator(theNavigator),
 61     fCurrentFieldMgr(detectorFieldMgr),        << 
 62     End_PointAndTangent(G4ThreeVector(0.,0.,0.     62     End_PointAndTangent(G4ThreeVector(0.,0.,0.),
 63                         G4ThreeVector(0.,0.,0. <<  63                         G4ThreeVector(0.,0.,0.),0.0,0.0,0.0,0.0,0.0),
 64 {                                              <<  64     fParticleIsLooping(false),
 65   fEpsilonStep = (fDetectorFieldMgr != nullptr <<  65     fVerboseLevel(0),
 66                ? fDetectorFieldMgr->GetMaximum <<  66     fMax_loop_count(1000),
 67                                                <<  67     fNoZeroStep(0), 
                                                   >>  68     fCharge(0.0), fInitialMomentumModulus(0.0), fMass(0.0),
                                                   >>  69     fUseSafetyForOptimisation(true),   // (false) is less sensitive to incorrect safety
                                                   >>  70     fSetFieldMgr(false),
                                                   >>  71     fpTrajectoryFilter( 0 )
                                                   >>  72 {
                                                   >>  73   if(fDetectorFieldMgr) { fEpsilonStep = fDetectorFieldMgr->GetMaximumEpsilonStep();}
                                                   >>  74   else                  { fEpsilonStep= 1.0e-5; } 
                                                   >>  75   fActionThreshold_NoZeroSteps = 2; 
                                                   >>  76   fSevereActionThreshold_NoZeroSteps = 10; 
                                                   >>  77   fAbandonThreshold_NoZeroSteps = 50; 
                                                   >>  78   fFull_CurveLen_of_LastAttempt = -1; 
                                                   >>  79   fLast_ProposedStepLength = -1;
                                                   >>  80   fLargestAcceptableStep = 1000.0 * meter;
 68                                                    81 
 69   fPreviousSftOrigin = G4ThreeVector(0.,0.,0.) <<  82   fPreviousSftOrigin= G4ThreeVector(0.,0.,0.);
                                                   >>  83   fPreviousSafety= 0.0;
 70   kCarTolerance = G4GeometryTolerance::GetInst     84   kCarTolerance = G4GeometryTolerance::GetInstance()->GetSurfaceTolerance();
 71   fZeroStepThreshold = std::max( 1.0e5 * kCarT << 
 72                                                << 
 73   fLargestAcceptableStep = 100.0 * meter;  //  << 
 74   fMaxStepSizeMultiplier=   0.1 ;   // 0.1 in  << 
 75   fMinBigDistance= 100. * CLHEP::mm;           << 
 76 #ifdef G4DEBUG_FIELD                           << 
 77   G4cout << " PiF: Zero Step Threshold set to  << 
 78          << fZeroStepThreshold / millimeter    << 
 79          << " mm." << G4endl;                  << 
 80   G4cout << " PiF:   Value of kCarTolerance =  << 
 81          << kCarTolerance / millimeter         << 
 82          << " mm. " << G4endl;                 << 
 83   fVerboseLevel = 2;                           << 
 84   fVerbTracePiF = true;                        << 
 85 #endif                                         << 
 86                                                    85 
 87   // Defining Intersection Locator and his par <<  86   // Definding Intersection Locator and his parameters
 88   if ( vLocator == nullptr )                   <<  87   if(vLocator==0){
 89   {                                            <<  88     fIntersectionLocator= new G4MultiLevelLocator(theNavigator);
 90     fIntersectionLocator = new G4MultiLevelLoc <<  89     fAllocatedLocator=true;
 91     fAllocatedLocator = true;                  <<  90   }else{
 92   }                                            <<  91     fIntersectionLocator=vLocator;
 93   else                                         <<  92     fAllocatedLocator=false;
 94   {                                            << 
 95     fIntersectionLocator = vLocator;           << 
 96     fAllocatedLocator = false;                 << 
 97   }                                                93   }
 98   RefreshIntersectionLocator();  //  Copy all  <<  94   fIntersectionLocator->SetEpsilonStepFor(fEpsilonStep);
                                                   >>  95   fIntersectionLocator->SetDeltaIntersectionFor(GetDeltaIntersection());
                                                   >>  96   fIntersectionLocator->SetChordFinderFor(GetChordFinder());
                                                   >>  97   fIntersectionLocator->SetSafetyParametersFor( fUseSafetyForOptimisation);
 99 }                                                  98 }
100                                                    99 
101 // ------------------------------------------- << 
102 //                                             << 
103 G4PropagatorInField::~G4PropagatorInField()       100 G4PropagatorInField::~G4PropagatorInField()
104 {                                                 101 {
105   if(fAllocatedLocator)  { delete  fIntersecti << 102   if(fAllocatedLocator)delete  fIntersectionLocator; 
106 }                                                 103 }
107                                                   104 
108 // ------------------------------------------- << 105 ///////////////////////////////////////////////////////////////////////////
109 // Update the IntersectionLocator with current << 
110 //                                                106 //
111 void G4PropagatorInField::RefreshIntersectionL << 
112 {                                              << 
113   fIntersectionLocator->SetEpsilonStepFor(fEps << 
114   fIntersectionLocator->SetDeltaIntersectionFo << 
115   fIntersectionLocator->SetChordFinderFor(GetC << 
116   fIntersectionLocator->SetSafetyParametersFor << 
117 }                                              << 
118                                                << 
119 // ------------------------------------------- << 
120 // Compute the next geometric Step                107 // Compute the next geometric Step
121 //                                             << 108 
122 G4double G4PropagatorInField::ComputeStep(     << 109 G4double
                                                   >> 110 G4PropagatorInField::ComputeStep(
123                 G4FieldTrack&      pFieldTrack    111                 G4FieldTrack&      pFieldTrack,
124                 G4double           CurrentProp    112                 G4double           CurrentProposedStepLength,
125                 G4double&          currentSafe    113                 G4double&          currentSafety,                // IN/OUT
126                 G4VPhysicalVolume* pPhysVol,   << 114                 G4VPhysicalVolume* pPhysVol)
127                 G4bool             canRelaxDel << 115 {
128 {                                              << 116   
129   GetChordFinder()->OnComputeStep(&pFieldTrack << 
130   const G4double deltaChord = GetChordFinder() << 
131                                                << 
132   // If CurrentProposedStepLength is too small    117   // If CurrentProposedStepLength is too small for finding Chords
133   // then return with no action (for now - TOD    118   // then return with no action (for now - TODO: some action)
134   //                                              119   //
135   const char* methodName = "G4PropagatorInFiel << 120   if(CurrentProposedStepLength<kCarTolerance)
136   if (CurrentProposedStepLength<kCarTolerance) << 
137   {                                               121   {
138     return kInfinity;                             122     return kInfinity;
139   }                                               123   }
140                                                   124 
141   // Introducing smooth trajectory display (ja    125   // Introducing smooth trajectory display (jacek 01/11/2002)
142   //                                              126   //
143   if (fpTrajectoryFilter != nullptr)           << 127   if (fpTrajectoryFilter)
144   {                                               128   {
145     fpTrajectoryFilter->CreateNewTrajectorySeg    129     fpTrajectoryFilter->CreateNewTrajectorySegment();
146   }                                               130   }
147                                                   131 
148   fFirstStepInVolume = fNewTrack ? true : fLas << 
149   fLastStepInVolume = false;                   << 
150   fNewTrack = false;                           << 
151                                                << 
152   if( fVerboseLevel > 2 )                      << 
153   {                                            << 
154     G4cout << methodName << " called" << G4end << 
155     G4cout << "   Starting FT: " << pFieldTrac << 
156     G4cout << "   Requested length = " << Curr << 
157     G4cout << "   PhysVol = ";                 << 
158     if( pPhysVol != nullptr )                  << 
159     {                                          << 
160        G4cout << pPhysVol->GetName() << G4endl << 
161     }                                          << 
162     else                                       << 
163     {                                          << 
164        G4cout << " N/A ";                      << 
165     }                                          << 
166     G4cout << G4endl;                          << 
167   }                                            << 
168                                                << 
169   // Parameters for adaptive Runge-Kutta integ    132   // Parameters for adaptive Runge-Kutta integration
170                                                   133   
171   G4double h_TrialStepSize;        // 1st Step << 134   G4double      h_TrialStepSize;        // 1st Step Size 
172   G4double TruePathLength = CurrentProposedSte << 135   G4double      TruePathLength = CurrentProposedStepLength;
173   G4double StepTaken = 0.0;                    << 136   G4double      StepTaken = 0.0; 
174   G4double s_length_taken, epsilon;            << 137   G4double      s_length_taken, epsilon ; 
175   G4bool   intersects;                         << 138   G4bool        intersects;
176   G4bool   first_substep = true;               << 139   G4bool        first_substep = true;
177                                                   140 
178   G4double NewSafety;                          << 141   G4double      NewSafety;
179   fParticleIsLooping = false;                     142   fParticleIsLooping = false;
180                                                   143 
181   // If not yet done,                             144   // If not yet done, 
182   //   Set the field manager to the local  one    145   //   Set the field manager to the local  one if the volume has one, 
183   //                      or to the global one    146   //                      or to the global one if not
184   //                                              147   //
185   if( !fSetFieldMgr )                          << 148   if( !fSetFieldMgr ) fCurrentFieldMgr= FindAndSetFieldManager( pPhysVol ); 
186   {                                            << 149   // For the next call, the field manager must again be set
187     fCurrentFieldMgr = FindAndSetFieldManager( << 150   fSetFieldMgr= false;
188   }                                            << 151 
189   fSetFieldMgr = false; // For next call, the  << 152   GetChordFinder()->SetChargeMomentumMass(fCharge, fInitialMomentumModulus, fMass); 
                                                   >> 153 
                                                   >> 154  // Values for Intersection Locator has to be updated on each call
                                                   >> 155  // because the CurrentFieldManager changes
                                                   >> 156     fIntersectionLocator->SetChordFinderFor(GetChordFinder());
                                                   >> 157     fIntersectionLocator->SetSafetyParametersFor( fUseSafetyForOptimisation);
                                                   >> 158     fIntersectionLocator->SetEpsilonStepFor(fEpsilonStep);
                                                   >> 159     fIntersectionLocator->SetDeltaIntersectionFor(GetDeltaIntersection()); 
190                                                   160 
191   G4FieldTrack CurrentState(pFieldTrack);      << 161   G4FieldTrack  CurrentState(pFieldTrack);
192   G4FieldTrack OriginalState = CurrentState;   << 162   G4FieldTrack  OriginalState = CurrentState;
193                                                   163 
194   // If the Step length is "infinite", then an    164   // If the Step length is "infinite", then an approximate-maximum Step
195   // length (used to calculate the relative ac << 165   // length (used to calculate the relative accuracy) must be guessed.
196   //                                              166   //
197   if( CurrentProposedStepLength >= fLargestAcc    167   if( CurrentProposedStepLength >= fLargestAcceptableStep )
198   {                                               168   {
199     G4ThreeVector StartPointA, VelocityUnit;      169     G4ThreeVector StartPointA, VelocityUnit;
200     StartPointA  = pFieldTrack.GetPosition();     170     StartPointA  = pFieldTrack.GetPosition();
201     VelocityUnit = pFieldTrack.GetMomentumDir(    171     VelocityUnit = pFieldTrack.GetMomentumDir();
202                                                   172 
203     G4double trialProposedStep = fMaxStepSizeM << 173     G4double trialProposedStep = 1.e2 * ( 10.0 * cm + 
204       fNavigator->GetWorldVolume()->GetLogical    174       fNavigator->GetWorldVolume()->GetLogicalVolume()->
205                   GetSolid()->DistanceToOut(St    175                   GetSolid()->DistanceToOut(StartPointA, VelocityUnit) );
206     CurrentProposedStepLength = std::min( tria << 176     CurrentProposedStepLength= std::min( trialProposedStep,
207                                           fLar << 177                                            fLargestAcceptableStep ); 
208   }                                               178   }
209   epsilon = fCurrentFieldMgr->GetDeltaOneStep( << 179   epsilon = GetDeltaOneStep() / CurrentProposedStepLength;
                                                   >> 180   // G4double raw_epsilon= epsilon;
210   G4double epsilonMin= fCurrentFieldMgr->GetMi    181   G4double epsilonMin= fCurrentFieldMgr->GetMinimumEpsilonStep();
211   G4double epsilonMax= fCurrentFieldMgr->GetMa << 182   G4double epsilonMax= fCurrentFieldMgr->GetMaximumEpsilonStep();; 
212   if( epsilon < epsilonMin )  { epsilon = epsi << 183   if( epsilon < epsilonMin ) epsilon = epsilonMin;
213   if( epsilon > epsilonMax )  { epsilon = epsi << 184   if( epsilon > epsilonMax ) epsilon = epsilonMax;
214   SetEpsilonStep( epsilon );                      185   SetEpsilonStep( epsilon );
215                                                   186 
216   // Values for Intersection Locator has to be << 187   // G4cout << "G4PiF: Epsilon of current step - raw= " << raw_epsilon
217   // case that CurrentFieldManager has changed << 188   //        << " final= " << epsilon << G4endl;
218   //                                           << 
219   RefreshIntersectionLocator();                << 
220                                                   189 
221   // Shorten the proposed step in case of earl << 190   //  Shorten the proposed step in case of earlier problems (zero steps)
222   //                                              191   // 
223   if( fNoZeroStep > fActionThreshold_NoZeroSte    192   if( fNoZeroStep > fActionThreshold_NoZeroSteps )
224   {                                               193   {
225     G4double stepTrial;                           194     G4double stepTrial;
226                                                   195 
227     stepTrial = fFull_CurveLen_of_LastAttempt; << 196     stepTrial= fFull_CurveLen_of_LastAttempt; 
228     if( (stepTrial <= 0.0) && (fLast_ProposedS << 197     if( (stepTrial <= 0.0) && (fLast_ProposedStepLength > 0.0) ) 
229     {                                          << 198       stepTrial= fLast_ProposedStepLength; 
230       stepTrial = fLast_ProposedStepLength;    << 
231     }                                          << 
232                                                   199 
233     G4double decreaseFactor = 0.9; // Unused d    200     G4double decreaseFactor = 0.9; // Unused default
234     if(   (fNoZeroStep < fSevereActionThreshol    201     if(   (fNoZeroStep < fSevereActionThreshold_NoZeroSteps)
235        && (stepTrial > 100.0*fZeroStepThreshol << 202        && (stepTrial > 1000.0*kCarTolerance) )
236     {                                             203     {
237       // Attempt quick convergence             << 204       // Ensure quicker convergence
238       //                                          205       //
239       decreaseFactor= 0.25;                    << 206       decreaseFactor= 0.1;
240     }                                             207     } 
241     else                                          208     else
242     {                                             209     {
243       // We are in significant difficulties, p    210       // We are in significant difficulties, probably at a boundary that
244       // is either geometrically sharp or betw    211       // is either geometrically sharp or between very different materials.
245       // Careful decreases to cope with tolera << 212       // Careful decreases to cope with tolerance are required.
246       //                                          213       //
247       if( stepTrial > 100.0*fZeroStepThreshold << 214       if( stepTrial > 1000.0*kCarTolerance )
248         decreaseFactor = 0.35;     // Try decr << 215         decreaseFactor = 0.25;     // Try slow decreases
249       } else if( stepTrial > 30.0*fZeroStepThr << 216       else if( stepTrial > 100.0*kCarTolerance )
250         decreaseFactor= 0.5;       // Try yet  << 217         decreaseFactor= 0.5;       // Try slower decreases
251       } else if( stepTrial > 10.0*fZeroStepThr << 218       else if( stepTrial > 10.0*kCarTolerance )
252         decreaseFactor= 0.75;      // Try even    219         decreaseFactor= 0.75;      // Try even slower decreases
253       } else {                                 << 220       else
254         decreaseFactor= 0.9;       // Try very    221         decreaseFactor= 0.9;       // Try very slow decreases
255       }                                        << 
256      }                                            222      }
257      stepTrial *= decreaseFactor;                 223      stepTrial *= decreaseFactor;
258                                                   224 
259 #ifdef G4DEBUG_FIELD                              225 #ifdef G4DEBUG_FIELD
260      if( fVerboseLevel > 2                     << 226      PrintStepLengthDiagnostic(CurrentProposedStepLength, decreaseFactor,
261       || (fNoZeroStep >= fSevereActionThreshol << 227                                stepTrial, pFieldTrack);
262      {                                         << 
263         G4cerr << " " << methodName            << 
264                << "  Decreasing step after " < << 
265                << " - in volume " << pPhysVol; << 
266         if( pPhysVol )                         << 
267            G4cerr << " with name " << pPhysVol << 
268         else                                   << 
269            G4cerr << " i.e. *unknown* volume." << 
270         G4cerr << G4endl;                      << 
271         PrintStepLengthDiagnostic(CurrentPropo << 
272                                   stepTrial, p << 
273      }                                         << 
274 #endif                                            228 #endif
275      if( stepTrial == 0.0 )  //  Change to mak << 229      if( stepTrial == 0.0 )
276      {                                            230      {
277        std::ostringstream message;             << 231        G4cout << " G4PropagatorInField::ComputeStep "
278        message << "Particle abandoned due to l << 232               << " Particle abandoned due to lack of progress in field."
279                << G4endl                       << 233               << G4endl
280                << "  Properties : " << pFieldT << 234               << " Properties : " << pFieldTrack << " "
281                << "  Attempting a zero step =  << 235               << G4endl;
282                << "  while attempting to progr << 236        G4cerr << " G4PropagatorInField::ComputeStep "
283                << " trial steps. Will abandon  << 237               << "  ERROR : attempting a zero step= " << stepTrial << G4endl
284        G4Exception(methodName, "GeomNav1002",  << 238               << " while attempting to progress after " << fNoZeroStep
285        fParticleIsLooping = true;              << 239               << " trial steps.  Will abandon step." << G4endl;
286        return 0;  // = stepTrial;              << 240          fParticleIsLooping= true;
                                                   >> 241          return 0;  // = stepTrial;
287      }                                            242      }
288      if( stepTrial < CurrentProposedStepLength    243      if( stepTrial < CurrentProposedStepLength )
289      {                                         << 
290        CurrentProposedStepLength = stepTrial;     244        CurrentProposedStepLength = stepTrial;
291      }                                         << 
292   }                                               245   }
293   fLast_ProposedStepLength = CurrentProposedSt    246   fLast_ProposedStepLength = CurrentProposedStepLength;
294                                                   247 
295   G4int do_loop_count = 0;                        248   G4int do_loop_count = 0; 
296   do  // Loop checking, 07.10.2016, JA         << 249   do
297   {                                               250   { 
298     G4FieldTrack SubStepStartState = CurrentSt    251     G4FieldTrack SubStepStartState = CurrentState;
299     G4ThreeVector SubStartPoint = CurrentState    252     G4ThreeVector SubStartPoint = CurrentState.GetPosition(); 
300                                                << 253 
301     if(!first_substep)                         << 254     if( !first_substep) {
302     {                                          << 
303       if( fVerboseLevel > 4 )                  << 
304       {                                        << 
305         G4cout << " PiF: Calling Nav/Locate Gl << 
306                << G4endl;                      << 
307       }                                        << 
308       fNavigator->LocateGlobalPointWithinVolum    255       fNavigator->LocateGlobalPointWithinVolume( SubStartPoint );
309     }                                             256     }
310                                                   257 
311     // How far to attempt to move the particle    258     // How far to attempt to move the particle !
312     //                                            259     //
313     h_TrialStepSize = CurrentProposedStepLengt    260     h_TrialStepSize = CurrentProposedStepLength - StepTaken;
314                                                   261 
315     if (canRelaxDeltaChord &&                  << 
316         fIncreaseChordDistanceThreshold > 0  & << 
317         do_loop_count > fIncreaseChordDistance << 
318         do_loop_count % fIncreaseChordDistance << 
319     {                                          << 
320         GetChordFinder()->SetDeltaChord(       << 
321           GetChordFinder()->GetDeltaChord() *  << 
322         );                                     << 
323     }                                          << 
324                                                << 
325     // Integrate as far as "chord miss" rule a    262     // Integrate as far as "chord miss" rule allows.
326     //                                            263     //
327     s_length_taken = GetChordFinder()->Advance    264     s_length_taken = GetChordFinder()->AdvanceChordLimited( 
328                              CurrentState,        265                              CurrentState,    // Position & velocity
329                              h_TrialStepSize,     266                              h_TrialStepSize,
330                              fEpsilonStep,        267                              fEpsilonStep,
331                              fPreviousSftOrigi    268                              fPreviousSftOrigin,
332                              fPreviousSafety ) << 269                              fPreviousSafety
333       // CurrentState is now updated with the  << 270                              );
                                                   >> 271     //  CurrentState is now updated with the final position and velocity. 
334                                                   272 
335     fFull_CurveLen_of_LastAttempt = s_length_t    273     fFull_CurveLen_of_LastAttempt = s_length_taken;
336                                                   274 
337     G4ThreeVector EndPointB = CurrentState.Get << 275     G4ThreeVector  EndPointB = CurrentState.GetPosition(); 
338     G4ThreeVector InterSectionPointE;          << 276     G4ThreeVector  InterSectionPointE;
339     G4double      LinearStepLength;            << 277     G4double       LinearStepLength;
340                                                   278  
341     // Intersect chord AB with geometry           279     // Intersect chord AB with geometry
342     //                                         << 
343     intersects= IntersectChord( SubStartPoint,    280     intersects= IntersectChord( SubStartPoint, EndPointB, 
344                                 NewSafety, Lin << 281                                 NewSafety,     LinearStepLength, 
345                                 InterSectionPo    282                                 InterSectionPointE );
346       // E <- Intersection Point of chord AB a << 283     // E <- Intersection Point of chord AB and either volume A's surface 
347       //                                  or a << 284     //                                  or a daughter volume's surface ..
348                                                   285 
349     if( first_substep )                        << 286     if( first_substep ) { 
350     {                                          << 
351        currentSafety = NewSafety;                 287        currentSafety = NewSafety;
352     } // Updating safety in other steps is pot    288     } // Updating safety in other steps is potential future extention
353                                                   289 
354     if( intersects )                              290     if( intersects )
355     {                                             291     {
356        G4FieldTrack IntersectPointVelct_G(Curr    292        G4FieldTrack IntersectPointVelct_G(CurrentState);  // FT-Def-Construct
357                                                   293 
358        // Find the intersection point of AB tr    294        // Find the intersection point of AB true path with the surface
359        //   of vol(A), if it exists. Start wit    295        //   of vol(A), if it exists. Start with point E as first "estimate".
360        G4bool recalculatedEndPt = false;       << 296        G4bool recalculatedEndPt= false;
361                                                   297        
362        G4bool found_intersection = fIntersecti << 298          G4bool found_intersection = fIntersectionLocator->
363          EstimateIntersectionPoint( SubStepSta    299          EstimateIntersectionPoint( SubStepStartState, CurrentState, 
364                                     InterSecti << 300                                   InterSectionPointE, IntersectPointVelct_G,
365                                     recalculat << 301                                   recalculatedEndPt,fPreviousSafety,fPreviousSftOrigin);
366                                     fPreviousS << 302        intersects = intersects && found_intersection;
367        intersects = found_intersection;        << 303        if( found_intersection ) {        
368        if( found_intersection )                << 
369        {                                       << 
370           End_PointAndTangent= IntersectPointV    304           End_PointAndTangent= IntersectPointVelct_G;  // G is our EndPoint ...
371           StepTaken = TruePathLength = Interse    305           StepTaken = TruePathLength = IntersectPointVelct_G.GetCurveLength()
372                                      - Origina << 306                                       - OriginalState.GetCurveLength();
373        }                                       << 307        } else {
374        else                                    << 308           // intersects= false;          // "Minor" chords do not intersect
375        {                                       << 309           if( recalculatedEndPt ){
376           // Either "minor" chords do not inte << 310              CurrentState= IntersectPointVelct_G; 
377           // or else stopped (due to too many  << 
378           //                                   << 
379           if( recalculatedEndPt )              << 
380           {                                    << 
381              G4double endAchieved = IntersectP << 
382              G4double endExpected = CurrentSta << 
383                                                << 
384              // Detect failure - due to too ma << 
385              G4bool shortEnd = endAchieved     << 
386                              < (endExpected*(1 << 
387                                                << 
388              G4double stepAchieved = endAchiev << 
389                                    - SubStepSt << 
390                                                << 
391              // Update remaining state - must  << 
392              // abandonned intersection        << 
393              //                                << 
394              CurrentState = IntersectPointVelc << 
395              s_length_taken = stepAchieved;    << 
396              if( shortEnd )                    << 
397              {                                 << 
398                 fParticleIsLooping = true;     << 
399              }                                 << 
400           }                                       311           }
401        }                                          312        }
402     }                                             313     }
403     if( !intersects )                             314     if( !intersects )
404     {                                             315     {
405       StepTaken += s_length_taken;             << 316       StepTaken += s_length_taken; 
406                                                << 317       // For smooth trajectory display (jacek 01/11/2002)
407       if (fpTrajectoryFilter != nullptr) // Fo << 318       if (fpTrajectoryFilter) {
408       {                                        << 
409         fpTrajectoryFilter->TakeIntermediatePo    319         fpTrajectoryFilter->TakeIntermediatePoint(CurrentState.GetPosition());
410       }                                           320       }
411     }                                             321     }
412     first_substep = false;                        322     first_substep = false;
413                                                   323 
414 #ifdef G4DEBUG_FIELD                              324 #ifdef G4DEBUG_FIELD
415     if( fNoZeroStep > fActionThreshold_NoZeroS << 325     if( fNoZeroStep > fActionThreshold_NoZeroSteps ) {
416     {                                          << 
417       if( fNoZeroStep > fSevereActionThreshold << 
418         G4cout << " Above 'Severe Action' thre << 
419       else                                     << 
420         G4cout << " Above 'action' threshold - << 
421       G4cout << " Number of zero steps = " <<  << 
422       printStatus( SubStepStartState,  // or O    326       printStatus( SubStepStartState,  // or OriginalState,
423                    CurrentState, CurrentPropos << 327                    CurrentState,  CurrentProposedStepLength, 
424                    NewSafety, do_loop_count, p << 328                    NewSafety,     do_loop_count,  pPhysVol );
425     }                                             329     }
426     if( (fVerboseLevel > 1) && (do_loop_count  << 330 #endif
427     {                                          << 331 #ifdef G4VERBOSE
428       if( do_loop_count == fMax_loop_count-9 ) << 332     if( (fVerboseLevel > 1) && (do_loop_count > fMax_loop_count-10 )) {
429       {                                        << 333       if( do_loop_count == fMax_loop_count-9 ){
430         G4cout << " G4PropagatorInField::Compu << 334         G4cout << "G4PropagatorInField::ComputeStep "
431                << "  Difficult track - taking  << 335                << " Difficult track - taking many sub steps." << G4endl;
432         printStatus( SubStepStartState, SubSte << 
433                      NewSafety, 0, pPhysVol ); << 
434       }                                           336       }
435       printStatus( SubStepStartState, CurrentS    337       printStatus( SubStepStartState, CurrentState, CurrentProposedStepLength, 
436                    NewSafety, do_loop_count, p    338                    NewSafety, do_loop_count, pPhysVol );
437     }                                             339     }
438 #endif                                            340 #endif
439                                                   341 
440     ++do_loop_count;                           << 342     do_loop_count++;
441                                                   343 
442   } while( (!intersects )                         344   } while( (!intersects )
443         && (!fParticleIsLooping)               << 
444         && (StepTaken + kCarTolerance < Curren    345         && (StepTaken + kCarTolerance < CurrentProposedStepLength)  
445         && ( do_loop_count < fMax_loop_count )    346         && ( do_loop_count < fMax_loop_count ) );
446                                                   347 
447   if(  do_loop_count >= fMax_loop_count        << 348   if( do_loop_count >= fMax_loop_count  )
448     && (StepTaken + kCarTolerance < CurrentPro << 
449   {                                               349   {
450     fParticleIsLooping = true;                    350     fParticleIsLooping = true;
                                                   >> 351 
                                                   >> 352     if ( fVerboseLevel > 0 ){
                                                   >> 353        G4cout << "G4PropagateInField: Killing looping particle " 
                                                   >> 354               // << " of " << energy  << " energy "
                                                   >> 355               << " after " << do_loop_count << " field substeps "
                                                   >> 356               << " totaling " << StepTaken / mm << " mm " ;
                                                   >> 357        if( pPhysVol )
                                                   >> 358           G4cout << " in the volume " << pPhysVol->GetName() ; 
                                                   >> 359        else
                                                   >> 360          G4cout << " in unknown or null volume. " ; 
                                                   >> 361        G4cout << G4endl;
                                                   >> 362     }
451   }                                               363   }
452   if ( ( fParticleIsLooping ) && (fVerboseLeve << 364 
453   {                                            << 
454     ReportLoopingParticle( do_loop_count, Step << 
455                            CurrentProposedStep << 
456                            CurrentState.GetMom << 
457   }                                            << 
458                                                << 
459   if( !intersects )                               365   if( !intersects )
460   {                                               366   {
461     // Chord AB or "minor chords" do not inter    367     // Chord AB or "minor chords" do not intersect
462     // B is the endpoint Step of the current S    368     // B is the endpoint Step of the current Step.
463     //                                            369     //
464     End_PointAndTangent = CurrentState;           370     End_PointAndTangent = CurrentState; 
465     TruePathLength = StepTaken;   //  Original << 371     TruePathLength = StepTaken;
466                                                << 
467     // Tried the following to avoid potential  << 
468     // - but has issues... Suppressing this ch << 
469     // TruePathLength = CurrentProposedStepLen << 
470   }                                               372   }
471   fLastStepInVolume = intersects;              << 
472                                                   373   
473   // Set pFieldTrack to the return value          374   // Set pFieldTrack to the return value
474   //                                              375   //
475   pFieldTrack = End_PointAndTangent;              376   pFieldTrack = End_PointAndTangent;
476                                                   377 
477 #ifdef G4VERBOSE                                  378 #ifdef G4VERBOSE
478   // Check that "s" is correct                    379   // Check that "s" is correct
479   //                                              380   //
480   if( std::fabs(OriginalState.GetCurveLength()    381   if( std::fabs(OriginalState.GetCurveLength() + TruePathLength 
481       - End_PointAndTangent.GetCurveLength())     382       - End_PointAndTangent.GetCurveLength()) > 3.e-4 * TruePathLength )
482   {                                               383   {
483     std::ostringstream message;                << 384     G4cerr << " ERROR - G4PropagatorInField::ComputeStep():" << G4endl
484     message << "Curve length mis-match between << 385            << " Curve length mis-match, is advancement wrong ? " << G4endl;
485             << "and proposed endpoint of propa << 386     G4cerr << " The curve length of the endpoint should be: " 
486             << "  The curve length of the endp << 387            << OriginalState.GetCurveLength() + TruePathLength << G4endl
487             << OriginalState.GetCurveLength()  << 388            << " and it is instead: "
488             << "  and it is instead: "         << 389            << End_PointAndTangent.GetCurveLength() << "." << G4endl
489             << End_PointAndTangent.GetCurveLen << 390            << " A difference of: "
490             << "  A difference of: "           << 391            << OriginalState.GetCurveLength() + TruePathLength 
491             << OriginalState.GetCurveLength()  << 392               - End_PointAndTangent.GetCurveLength() << G4endl;
492                - End_PointAndTangent.GetCurveL << 393     G4cerr << " Original state= " << OriginalState   << G4endl
493             << "  Original state = " << Origin << 394            << " Proposed state= " << End_PointAndTangent << G4endl;
494             << "  Proposed state = " << End_Po << 395     G4Exception("G4PropagatorInField::ComputeStep()", "IncorrectProposedEndPoint",
495     G4Exception(methodName, "GeomNav0003", Fat << 396                 FatalException, 
                                                   >> 397                 "Curve length mis-match between original state and proposed endpoint of propagation.");
496   }                                               398   }
497 #endif                                            399 #endif
498                                                   400 
499   if( TruePathLength+kCarTolerance >= CurrentP << 401   // In particular anomalous cases, we can get repeated zero steps
500   {                                            << 402   // In order to correct this efficiently, we identify these cases
501      fNoZeroStep = 0;                          << 403   // and only take corrective action when they occur.
502   }                                            << 404   // 
                                                   >> 405   if( TruePathLength < 0.5*kCarTolerance ) 
                                                   >> 406     fNoZeroStep++;
503   else                                            407   else
504   {                                            << 408     fNoZeroStep = 0;
505      // In particular anomalous cases, we can  << 409 
506      // We identify these cases and take corre << 410   if( fNoZeroStep > fAbandonThreshold_NoZeroSteps ) { 
507      //                                        << 
508      if( TruePathLength < std::max( fZeroStepT << 
509      {                                         << 
510         ++fNoZeroStep;                         << 
511      }                                         << 
512      else                                      << 
513      {                                         << 
514         fNoZeroStep = 0;                       << 
515      }                                         << 
516   }                                            << 
517   if( fNoZeroStep > fAbandonThreshold_NoZeroSt << 
518   {                                            << 
519      fParticleIsLooping = true;                   411      fParticleIsLooping = true;
520      ReportStuckParticle( fNoZeroStep, Current << 412      G4cout << " WARNING - G4PropagatorInField::ComputeStep():" << G4endl
521                           fFull_CurveLen_of_La << 413             << " Zero progress for "  << fNoZeroStep << " attempted steps." 
                                                   >> 414             << G4endl;
                                                   >> 415      G4cout << "Proposed Step is "<<CurrentProposedStepLength <<" but Step Taken is "<< fFull_CurveLen_of_LastAttempt <<G4endl;
                                                   >> 416      G4cout << "For Particle with Charge ="<<fCharge
                                                   >> 417             << " Momentum="<< fInitialMomentumModulus<<" Mass="<< fMass<<G4endl;
                                                   >> 418        if( pPhysVol )
                                                   >> 419           G4cout << " in the volume " << pPhysVol->GetName() ; 
                                                   >> 420        else
                                                   >> 421          G4cout << " in unknown or null volume. " ; 
                                                   >> 422        G4cout << G4endl;
                                                   >> 423      if ( fVerboseLevel > 2 )
                                                   >> 424        G4cout << " Particle that is stuck will be killed." << G4endl;
522      fNoZeroStep = 0;                             425      fNoZeroStep = 0; 
523   }                                               426   }
524                                                   427  
525   GetChordFinder()->SetDeltaChord(deltaChord); << 
526   return TruePathLength;                          428   return TruePathLength;
527 }                                                 429 }
528                                                   430 
529 // ------------------------------------------- << 431 ///////////////////////////////////////////////////////////////////////////
530 // Dumps status of propagator                  << 
531 //                                                432 //
                                                   >> 433 // Dumps status of propagator.
                                                   >> 434 
532 void                                              435 void
533 G4PropagatorInField::printStatus( const G4Fiel << 436 G4PropagatorInField::printStatus( const G4FieldTrack&        StartFT,
534                                   const G4Fiel << 437                                   const G4FieldTrack&        CurrentFT, 
535                                         G4doub << 438                                         G4double             requestStep, 
536                                         G4doub << 439                                         G4double             safety,
537                                         G4int  << 440                                         G4int                stepNo, 
538                                         G4VPhy << 441                                         G4VPhysicalVolume*   startVolume)
539 {                                                 442 {
540   const G4int verboseLevel = fVerboseLevel;    << 443   const G4int verboseLevel= fVerboseLevel;
541   const G4ThreeVector StartPosition       = St    444   const G4ThreeVector StartPosition       = StartFT.GetPosition();
542   const G4ThreeVector StartUnitVelocity   = St    445   const G4ThreeVector StartUnitVelocity   = StartFT.GetMomentumDir();
543   const G4ThreeVector CurrentPosition     = Cu    446   const G4ThreeVector CurrentPosition     = CurrentFT.GetPosition();
544   const G4ThreeVector CurrentUnitVelocity = Cu    447   const G4ThreeVector CurrentUnitVelocity = CurrentFT.GetMomentumDir();
545                                                   448 
546   G4double step_len = CurrentFT.GetCurveLength    449   G4double step_len = CurrentFT.GetCurveLength() - StartFT.GetCurveLength();
547                                                << 
548   G4long oldprec;   // cout/cerr precision set << 
549                                                   450       
550   if( ((stepNo == 0) && (verboseLevel <3)) ||  << 451   if( ((stepNo == 0) && (verboseLevel <3))
                                                   >> 452       || (verboseLevel >= 3) )
551   {                                               453   {
552     oldprec = G4cout.precision(4);             << 454     static G4int noPrecision= 4;
                                                   >> 455     G4cout.precision(noPrecision);
                                                   >> 456     // G4cout.setf(ios_base::fixed,ios_base::floatfield);
                                                   >> 457     G4cout << std::setw( 6)  << " " 
                                                   >> 458            << std::setw( 25) << " Current Position  and  Direction" << " "
                                                   >> 459            << G4endl; 
553     G4cout << std::setw( 5) << "Step#"            460     G4cout << std::setw( 5) << "Step#" 
554            << std::setw(10) << "  s  " << " "     461            << std::setw(10) << "  s  " << " "
555            << std::setw(10) << "X(mm)" << " "     462            << std::setw(10) << "X(mm)" << " "
556            << std::setw(10) << "Y(mm)" << " "     463            << std::setw(10) << "Y(mm)" << " "  
557            << std::setw(10) << "Z(mm)" << " "     464            << std::setw(10) << "Z(mm)" << " "
558            << std::setw( 7) << " N_x " << " "     465            << std::setw( 7) << " N_x " << " "
559            << std::setw( 7) << " N_y " << " "     466            << std::setw( 7) << " N_y " << " "
560            << std::setw( 7) << " N_z " << " "     467            << std::setw( 7) << " N_z " << " " ;
561     G4cout << std::setw( 7) << " Delta|N|" <<  << 468     //            << G4endl; 
                                                   >> 469     G4cout     // << " >>> "
                                                   >> 470            << std::setw( 7) << " Delta|N|" << " "
                                                   >> 471       //   << std::setw( 7) << " Delta(N_z) " << " "
562            << std::setw( 9) << "StepLen" << "     472            << std::setw( 9) << "StepLen" << " "  
563            << std::setw(12) << "StartSafety" <    473            << std::setw(12) << "StartSafety" << " "  
564            << std::setw( 9) << "PhsStep" << "     474            << std::setw( 9) << "PhsStep" << " ";  
565     if( startVolume != nullptr )               << 475     if( startVolume ) {
566       { G4cout << std::setw(18) << "NextVolume << 476       G4cout << std::setw(18) << "NextVolume" << " "; 
567     G4cout.precision(oldprec);                 << 477     }
568     G4cout << G4endl;                          << 
569   }                                            << 
570   if((stepNo == 0) && (verboseLevel <=3))      << 
571   {                                            << 
572     // Recurse to print the start values       << 
573     //                                         << 
574     printStatus( StartFT, StartFT, -1.0, safet << 
575   }                                            << 
576   if( verboseLevel <= 3 )                      << 
577   {                                            << 
578     if( stepNo >= 0)                           << 
579       { G4cout << std::setw( 4) << stepNo << " << 
580     else                                       << 
581       { G4cout << std::setw( 5) << "Start" ; } << 
582     oldprec = G4cout.precision(8);             << 
583     G4cout << std::setw(10) << CurrentFT.GetCu << 
584     G4cout.precision(8);                       << 
585     G4cout << std::setw(10) << CurrentPosition << 
586            << std::setw(10) << CurrentPosition << 
587            << std::setw(10) << CurrentPosition << 
588     G4cout.precision(4);                       << 
589     G4cout << std::setw( 7) << CurrentUnitVelo << 
590            << std::setw( 7) << CurrentUnitVelo << 
591            << std::setw( 7) << CurrentUnitVelo << 
592     G4cout.precision(3);                       << 
593     G4cout << std::setw( 7)                    << 
594            << CurrentFT.GetMomentum().mag()-St << 
595     G4cout << std::setw( 9) << step_len << " " << 
596     G4cout << std::setw(12) << safety << " ";  << 
597     if( requestStep != -1.0 )                  << 
598       { G4cout << std::setw( 9) << requestStep << 
599     else                                       << 
600       { G4cout << std::setw( 9) << "Init/NotKn << 
601     if( startVolume != nullptr)                << 
602       { G4cout << std::setw(12) << startVolume << 
603     G4cout.precision(oldprec);                 << 
604     G4cout << G4endl;                             478     G4cout << G4endl;
605   }                                               479   }
606   else // if( verboseLevel > 3 )               << 480   if((stepNo == 0) && (verboseLevel <=3)){
607   {                                            << 481      // Recurse to print the start values
608     //  Multi-line output                      << 482      //
609                                                << 483      printStatus( StartFT, StartFT, -1.0, safety, -1, startVolume);
610     G4cout << "Step taken was " << step_len    << 484    }
611            << " out of PhysicalStep = " <<  re << 485    if( verboseLevel <= 3 )
612     G4cout << "Final safety is: " << safety << << 486    {
613     G4cout << "Chord length = " << (CurrentPos << 487      if( stepNo >= 0)
614            << G4endl;                          << 488        G4cout << std::setw( 4) << stepNo << " ";
615     G4cout << G4endl;                          << 489      else
616   }                                            << 490        G4cout << std::setw( 5) << "Start" ;
                                                   >> 491      G4cout.precision(8);
                                                   >> 492      G4cout << std::setw(10) << CurrentFT.GetCurveLength() << " "; 
                                                   >> 493      G4cout.precision(8);
                                                   >> 494      G4cout << std::setw(10) << CurrentPosition.x() << " "
                                                   >> 495             << std::setw(10) << CurrentPosition.y() << " "
                                                   >> 496             << std::setw(10) << CurrentPosition.z() << " ";
                                                   >> 497      G4cout.precision(4);
                                                   >> 498      G4cout << std::setw( 7) << CurrentUnitVelocity.x() << " "
                                                   >> 499             << std::setw( 7) << CurrentUnitVelocity.y() << " "
                                                   >> 500             << std::setw( 7) << CurrentUnitVelocity.z() << " ";
                                                   >> 501      //  G4cout << G4endl; 
                                                   >> 502      //     G4cout << " >>> " ; 
                                                   >> 503      G4cout.precision(3); 
                                                   >> 504      G4cout << std::setw( 7) << CurrentFT.GetMomentum().mag()- StartFT.GetMomentum().mag() << " "; 
                                                   >> 505      //   << std::setw( 7) << CurrentUnitVelocity.z() - InitialUnitVelocity.z() << " ";
                                                   >> 506      G4cout << std::setw( 9) << step_len << " "; 
                                                   >> 507      G4cout << std::setw(12) << safety << " ";
                                                   >> 508      if( requestStep != -1.0 ) 
                                                   >> 509        G4cout << std::setw( 9) << requestStep << " ";
                                                   >> 510      else
                                                   >> 511        G4cout << std::setw( 9) << "Init/NotKnown" << " "; 
                                                   >> 512 
                                                   >> 513      if( startVolume != 0)
                                                   >> 514      {
                                                   >> 515        G4cout << std::setw(12) << startVolume->GetName() << " ";
                                                   >> 516      }
                                                   >> 517 #if 0
                                                   >> 518      else
                                                   >> 519      {
                                                   >> 520        if( step_len != -1 )
                                                   >> 521          G4cout << std::setw(12) << "OutOfWorld" << " ";
                                                   >> 522        else
                                                   >> 523          G4cout << std::setw(12) << "NotGiven" << " ";
                                                   >> 524      }
                                                   >> 525 #endif
                                                   >> 526 
                                                   >> 527      G4cout << G4endl;
                                                   >> 528    }
                                                   >> 529    else // if( verboseLevel > 3 )
                                                   >> 530    {
                                                   >> 531      //  Multi-line output
                                                   >> 532        
                                                   >> 533      G4cout << "Step taken was " << step_len  
                                                   >> 534             << " out of PhysicalStep= " <<  requestStep << G4endl;
                                                   >> 535      G4cout << "Final safety is: " << safety << G4endl;
                                                   >> 536 
                                                   >> 537      G4cout << "Chord length = " << (CurrentPosition-StartPosition).mag()
                                                   >> 538             << G4endl;
                                                   >> 539      G4cout << G4endl; 
                                                   >> 540    }
617 }                                                 541 }
618                                                   542 
619 // ------------------------------------------- << 543 ///////////////////////////////////////////////////////////////////////////
620 // Prints Step diagnostics                     << 
621 //                                                544 //
                                                   >> 545 // Prints Step diagnostics
                                                   >> 546 
622 void                                              547 void 
623 G4PropagatorInField::PrintStepLengthDiagnostic    548 G4PropagatorInField::PrintStepLengthDiagnostic(
624                           G4double CurrentProp    549                           G4double CurrentProposedStepLength,
625                           G4double decreaseFac    550                           G4double decreaseFactor,
626                           G4double stepTrial,     551                           G4double stepTrial,
627                     const G4FieldTrack& )         552                     const G4FieldTrack& )
628 {                                                 553 {
629   G4long iprec= G4cout.precision(8);           << 554   G4cout << " PiF: NoZeroStep= " << fNoZeroStep
630   G4cout << " " << std::setw(12) << " PiF: NoZ << 555          << " CurrentProposedStepLength= " << CurrentProposedStepLength
631          << " " << std::setw(20) << " CurrentP << 556          << " Full_curvelen_last=" << fFull_CurveLen_of_LastAttempt
632          << " " << std::setw(18) << " Full_cur << 557          << " last proposed step-length= " << fLast_ProposedStepLength 
633          << " " << std::setw(18) << " last pro << 558          << " decreate factor = " << decreaseFactor
634          << " " << std::setw(18) << " decrease << 559          << " step trial = " << stepTrial
635          << " " << std::setw(15) << " step tri << 
636          << G4endl;                               560          << G4endl;
637                                                << 
638   G4cout << " " << std::setw(10) << fNoZeroSte << 
639          << " " << std::setw(20) << CurrentPro << 
640          << " " << std::setw(18) << fFull_Curv << 
641          << " " << std::setw(18) << fLast_Prop << 
642          << " " << std::setw(18) << decreaseFa << 
643          << " " << std::setw(15) << stepTrial  << 
644          << G4endl;                            << 
645   G4cout.precision( iprec );                   << 
646 }                                                 561 }
647                                                   562 
648 // Access the points which have passed through    563 // Access the points which have passed through the filter. The
649 // points are stored as ThreeVectors for the i    564 // points are stored as ThreeVectors for the initial impelmentation
650 // only (jacek 30/10/2002)                        565 // only (jacek 30/10/2002)
651 // Responsibility for deleting the points lies    566 // Responsibility for deleting the points lies with
652 // SmoothTrajectoryPoint, which is the points'    567 // SmoothTrajectoryPoint, which is the points' final
653 // destination. The points pointer is set to N    568 // destination. The points pointer is set to NULL, to ensure that
654 // the points are not re-used in subsequent st    569 // the points are not re-used in subsequent steps, therefore THIS
655 // METHOD MUST BE CALLED EXACTLY ONCE PER STEP    570 // METHOD MUST BE CALLED EXACTLY ONCE PER STEP. (jacek 08/11/2002)
656                                                   571 
657 std::vector<G4ThreeVector>*                       572 std::vector<G4ThreeVector>*
658 G4PropagatorInField::GimmeTrajectoryVectorAndF    573 G4PropagatorInField::GimmeTrajectoryVectorAndForgetIt() const
659 {                                                 574 {
660   // NB, GimmeThePointsAndForgetThem really fo    575   // NB, GimmeThePointsAndForgetThem really forgets them, so it can
661   // only be called (exactly) once for each st    576   // only be called (exactly) once for each step.
662                                                   577 
663   if (fpTrajectoryFilter != nullptr)           << 578   if (fpTrajectoryFilter)
664   {                                               579   {
665     return fpTrajectoryFilter->GimmeThePointsA    580     return fpTrajectoryFilter->GimmeThePointsAndForgetThem();
666   }                                               581   }
667   return nullptr;                              << 582   else
                                                   >> 583   {
                                                   >> 584     return 0;
                                                   >> 585   }
668 }                                                 586 }
669                                                   587 
670 // ------------------------------------------- << 
671 //                                             << 
672 void                                              588 void 
673 G4PropagatorInField::SetTrajectoryFilter(G4VCu    589 G4PropagatorInField::SetTrajectoryFilter(G4VCurvedTrajectoryFilter* filter)
674 {                                                 590 {
675   fpTrajectoryFilter = filter;                    591   fpTrajectoryFilter = filter;
676 }                                                 592 }
677                                                   593 
678 // ------------------------------------------- << 
679 //                                             << 
680 void G4PropagatorInField::ClearPropagatorState    594 void G4PropagatorInField::ClearPropagatorState()
681 {                                                 595 {
682   // Goal: Clear all memory of previous steps,    596   // Goal: Clear all memory of previous steps,  cached information
683                                                   597 
684   fParticleIsLooping = false;                  << 598   fParticleIsLooping= false;
685   fNoZeroStep = 0;                             << 599   fNoZeroStep= 0;
686                                                   600 
687   fSetFieldMgr = false;  // Has field-manager  << 
688   fEpsilonStep= 1.0e-5;  // Relative accuracy  << 
689                                                << 
690   End_PointAndTangent= G4FieldTrack( G4ThreeVe    601   End_PointAndTangent= G4FieldTrack( G4ThreeVector(0.,0.,0.),
691                                      G4ThreeVe    602                                      G4ThreeVector(0.,0.,0.),
692                                      0.0,0.0,0    603                                      0.0,0.0,0.0,0.0,0.0); 
693   fFull_CurveLen_of_LastAttempt = -1;             604   fFull_CurveLen_of_LastAttempt = -1; 
694   fLast_ProposedStepLength = -1;                  605   fLast_ProposedStepLength = -1;
695                                                   606 
696   fPreviousSftOrigin= G4ThreeVector(0.,0.,0.);    607   fPreviousSftOrigin= G4ThreeVector(0.,0.,0.);
697   fPreviousSafety= 0.0;                           608   fPreviousSafety= 0.0;
698                                                << 
699   fNewTrack = true;                            << 
700 }                                                 609 }
701                                                   610 
702 // ------------------------------------------- << 
703 //                                             << 
704 G4FieldManager* G4PropagatorInField::             611 G4FieldManager* G4PropagatorInField::
705 FindAndSetFieldManager( G4VPhysicalVolume* pCu << 612 FindAndSetFieldManager( G4VPhysicalVolume* pCurrentPhysicalVolume)
706 {                                                 613 {
707   G4FieldManager* currentFieldMgr;                614   G4FieldManager* currentFieldMgr;
708                                                   615 
709   currentFieldMgr = fDetectorFieldMgr;            616   currentFieldMgr = fDetectorFieldMgr;
710   if( pCurrentPhysicalVolume != nullptr )      << 617   if( pCurrentPhysicalVolume)
711   {                                               618   {
712      G4FieldManager *pRegionFieldMgr = nullptr << 619      G4FieldManager *newFieldMgr = 0;
713      G4LogicalVolume* pLogicalVol = pCurrentPh << 620      newFieldMgr= pCurrentPhysicalVolume->GetLogicalVolume()->GetFieldManager();
714                                                << 621      if ( newFieldMgr ) 
715      if( pLogicalVol != nullptr )              << 622         currentFieldMgr = newFieldMgr;
716      {                                         << 
717         // Value for Region, if any, overrides << 
718         //                                     << 
719         G4Region*  pRegion = pLogicalVol->GetR << 
720         if( pRegion != nullptr )               << 
721         {                                      << 
722            pRegionFieldMgr = pRegion->GetField << 
723            if( pRegionFieldMgr != nullptr )    << 
724            {                                   << 
725               currentFieldMgr= pRegionFieldMgr << 
726            }                                   << 
727         }                                      << 
728                                                << 
729         // 'Local' Value from logical volume,  << 
730         //                                     << 
731         localFieldMgr = pLogicalVol->GetFieldM << 
732         if ( localFieldMgr != nullptr )        << 
733         {                                      << 
734            currentFieldMgr = localFieldMgr;    << 
735         }                                      << 
736      }                                         << 
737   }                                               623   }
738   fCurrentFieldMgr = currentFieldMgr;          << 624   fCurrentFieldMgr= currentFieldMgr;
739                                                   625 
740   // Flag that field manager has been set      << 626   // Flag that field manager has been set.
741   //                                           << 627   fSetFieldMgr= true;
742   fSetFieldMgr = true;                         << 
743                                                   628 
744   return currentFieldMgr;                         629   return currentFieldMgr;
745 }                                                 630 }
746                                                   631 
747 // ------------------------------------------- << 
748 //                                             << 
749 G4int G4PropagatorInField::SetVerboseLevel( G4    632 G4int G4PropagatorInField::SetVerboseLevel( G4int level )
750 {                                                 633 {
751   G4int oldval = fVerboseLevel;                << 634   G4int oldval= fVerboseLevel;
752   fVerboseLevel = level;                       << 635   fVerboseLevel= level;
753                                                   636 
754   // Forward the verbose level 'reduced' to Ch    637   // Forward the verbose level 'reduced' to ChordFinder,
755   // MagIntegratorDriver ... ?                    638   // MagIntegratorDriver ... ? 
756   //                                              639   //
757   auto integrDriver = GetChordFinder()->GetInt << 640   G4MagInt_Driver* integrDriver= GetChordFinder()->GetIntegrationDriver(); 
758   integrDriver->SetVerboseLevel( fVerboseLevel << 641   integrDriver->SetVerboseLevel( fVerboseLevel - 2 ); 
759   G4cout << "Set Driver verbosity to " << fVer    642   G4cout << "Set Driver verbosity to " << fVerboseLevel - 2 << G4endl;
760                                                   643 
761   return oldval;                                  644   return oldval;
762 }                                              << 
763                                                << 
764 // ------------------------------------------- << 
765 //                                             << 
766 void G4PropagatorInField::ReportLoopingParticl << 
767                                                << 
768                                                << 
769                                                << 
770                                                << 
771                                                << 
772 {                                              << 
773    std::ostringstream message;                 << 
774    G4double fraction = StepTaken / StepRequest << 
775    message << " Unfinished integration of trac << 
776            << " of momentum " << momentumVec < << 
777            << momentumVec.mag() << " ) " << G4 << 
778            << " after " << count << " field su << 
779            << " totaling " << std::setprecisio << 
780            << " out of requested step " << std << 
781            << StepRequested / mm << " mm ";    << 
782    message << " a fraction of ";               << 
783    G4int prec = 4;                             << 
784    if( fraction > 0.99 )                       << 
785    {                                           << 
786      prec = 7;                                 << 
787    }                                           << 
788    else                                        << 
789    {                                           << 
790      if (fraction > 0.97 )  { prec = 5; }      << 
791    }                                           << 
792    message << std::setprecision(prec)          << 
793            << 100. * StepTaken / StepRequested << 
794    if( pPhysVol != nullptr )                   << 
795    {                                           << 
796      message << " in volume " << pPhysVol->Get << 
797      auto material = pPhysVol->GetLogicalVolum << 
798      if( material != nullptr )                 << 
799      {                                         << 
800        message << " with material " << materia << 
801                << " ( density = "              << 
802                << material->GetDensity() / ( g << 
803      }                                         << 
804    }                                           << 
805    else                                        << 
806    {                                           << 
807      message << " in unknown (null) volume. "  << 
808    }                                           << 
809    G4Exception(methodName, "GeomNav1002", Just << 
810 }                                              << 
811                                                << 
812 // ------------------------------------------- << 
813 //                                             << 
814 void G4PropagatorInField::ReportStuckParticle( << 
815                                                << 
816                                                << 
817                                                << 
818 {                                              << 
819    std::ostringstream message;                 << 
820    message << "Particle is stuck; it will be k << 
821            << "  Zero progress for " << noZero << 
822            << G4endl                           << 
823            << "  Proposed Step is " << propose << 
824            << " but Step Taken is "<< lastTrie << 
825    if( physVol != nullptr )                    << 
826    {                                           << 
827       message << " in volume " << physVol->Get << 
828    }                                           << 
829    else                                        << 
830    {                                           << 
831       message << " in unknown or null volume.  << 
832    }                                           << 
833    G4Exception("G4PropagatorInField::ComputeSt << 
834                "GeomNav1002", JustWarning, mes << 
835 }                                              << 
836                                                << 
837 // ------------------------------------------- << 
838                                                << 
839 // ------------------------------------------- << 
840 // Methods to alter Parameters                 << 
841 // ------------------------------------------- << 
842                                                << 
843 // Was a data member (of an object) -- now mov << 
844 G4double  G4PropagatorInField::GetLargestAccep << 
845 {                                              << 
846   return fLargestAcceptableStep;               << 
847 }                                              << 
848                                                << 
849 // ------------------------------------------- << 
850 //                                             << 
851 void G4PropagatorInField::SetLargestAcceptable << 
852 {                                              << 
853   if( fLargestAcceptableStep>0.0 )             << 
854   {                                            << 
855     fLargestAcceptableStep = newBigDist;       << 
856   }                                            << 
857 }                                              << 
858                                                << 
859 // ------------------------------------------- << 
860                                                << 
861 G4double G4PropagatorInField::GetMaxStepSizeMu << 
862 {                                              << 
863   return fMaxStepSizeMultiplier;               << 
864 }                                              << 
865                                                << 
866 // ------------------------------------------- << 
867                                                << 
868 void     G4PropagatorInField::SetMaxStepSizeMu << 
869 {                                              << 
870   fMaxStepSizeMultiplier=vm;                   << 
871 }                                              << 
872                                                << 
873 // ------------------------------------------- << 
874                                                << 
875 G4double G4PropagatorInField::GetMinBigDistanc << 
876 {                                              << 
877   return fMinBigDistance;                      << 
878 }                                              << 
879                                                << 
880 // ------------------------------------------- << 
881                                                << 
882 void     G4PropagatorInField::SetMinBigDistanc << 
883 {                                              << 
884   fMinBigDistance= val;                        << 
885 }                                                 645 }
886                                                   646