Geant4  10.03.p01
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G4ChordFinderSaf Class Reference

#include <G4ChordFinderSaf.hh>

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Public Member Functions

 G4ChordFinderSaf (G4MagInt_Driver *pIntegrationDriver)
 
 G4ChordFinderSaf (G4MagneticField *theMagField, G4double stepMinimum, G4MagIntegratorStepper *pItsStepper)
 
 ~G4ChordFinderSaf ()
 
G4double FindNextChord (const G4FieldTrack &yStart, G4double stepMax, G4FieldTrack &yEnd, G4double &dyErrPos, G4double epsStep, G4double *pStepForAccuracy, const G4ThreeVector latestSafetyOrigin, G4double latestSafetyRadius)
 
void PrintStatistics ()
 
- Public Member Functions inherited from G4ChordFinder
 G4ChordFinder (G4MagInt_Driver *pIntegrationDriver)
 
 G4ChordFinder (G4MagneticField *itsMagField, G4double stepMinimum=1.0e-2, G4MagIntegratorStepper *pItsStepper=0)
 
virtual ~G4ChordFinder ()
 
G4double AdvanceChordLimited (G4FieldTrack &yCurrent, G4double stepInitial, G4double epsStep_Relative, const G4ThreeVector latestSafetyOrigin, G4double lasestSafetyRadius)
 
G4FieldTrack ApproxCurvePointS (const G4FieldTrack &curveAPointVelocity, const G4FieldTrack &curveBPointVelocity, const G4FieldTrack &ApproxCurveV, const G4ThreeVector &currentEPoint, const G4ThreeVector &currentFPoint, const G4ThreeVector &PointG, G4bool first, G4double epsStep)
 
G4FieldTrack ApproxCurvePointV (const G4FieldTrack &curveAPointVelocity, const G4FieldTrack &curveBPointVelocity, const G4ThreeVector &currentEPoint, G4double epsStep)
 
G4double InvParabolic (const G4double xa, const G4double ya, const G4double xb, const G4double yb, const G4double xc, const G4double yc)
 
G4double GetDeltaChord () const
 
void SetDeltaChord (G4double newval)
 
void SetIntegrationDriver (G4MagInt_Driver *IntegrationDriver)
 
G4MagInt_Driver * GetIntegrationDriver ()
 
void ResetStepEstimate ()
 
G4int GetNoCalls ()
 
G4int GetNoTrials ()
 
G4int GetNoMaxTrials ()
 
G4int SetVerbose (G4int newvalue=1)
 
void SetFractions_Last_Next (G4double fractLast=0.90, G4double fractNext=0.95)
 
void SetFirstFraction (G4double fractFirst)
 
void TestChordPrint (G4int noTrials, G4int lastStepTrial, G4double dChordStep, G4double nextStepTrial)
 
G4double GetFirstFraction ()
 
G4double GetFractionLast ()
 
G4double GetFractionNextEstimate ()
 
G4double GetMultipleRadius ()
 

Additional Inherited Members

- Protected Member Functions inherited from G4ChordFinder
void AccumulateStatistics (G4int noTrials)
 
G4bool AcceptableMissDist (G4double dChordStep) const
 
G4double NewStep (G4double stepTrialOld, G4double dChordStep, G4double &stepEstimate_Unconstrained)
 
void PrintDchordTrial (G4int noTrials, G4double stepTrial, G4double oldStepTrial, G4double dChordStep)
 
G4double GetLastStepEstimateUnc ()
 
void SetLastStepEstimateUnc (G4double stepEst)
 

Detailed Description

Definition at line 42 of file G4ChordFinderSaf.hh.

Constructor & Destructor Documentation

G4ChordFinderSaf::G4ChordFinderSaf ( G4MagInt_Driver *  pIntegrationDriver)

Definition at line 32 of file G4ChordFinderSaf.cc.

33  : G4ChordFinder(pIntegrationDriver)
34 {
35  // check the values and set the other parameters
36  // fNoInitialRadBig=0; fNoInitialRadSmall=0;
37  // fNoTrialsRadBig=0; fNoTrialsRadSmall=0;
38 
39 }
G4ChordFinder::G4ChordFinder
G4ChordFinder(G4MagInt_Driver *pIntegrationDriver)
Definition: G4ChordFinder.cc:47
G4ChordFinderSaf::G4ChordFinderSaf ( G4MagneticField *  theMagField,
G4double  stepMinimum,
G4MagIntegratorStepper *  pItsStepper 
)

Definition at line 43 of file G4ChordFinderSaf.cc.

46  : G4ChordFinder( theMagField, stepMinimum, pItsStepper )
47 {
48  // Let G4ChordFinder create the Driver, the Stepper and EqRhs ...
49  // ...
50 }
G4ChordFinder::G4ChordFinder
G4ChordFinder(G4MagInt_Driver *pIntegrationDriver)
Definition: G4ChordFinder.cc:47
G4ChordFinderSaf::~G4ChordFinderSaf ( )

Definition at line 56 of file G4ChordFinderSaf.cc.

57 {
58  if( SetVerbose(0) ) { PrintStatistics(); }
59  // Set verbosity 0, so that will be called in base class again
60 }
G4ChordFinder::SetVerbose
G4int SetVerbose(G4int newvalue=1)

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Member Function Documentation

G4double G4ChordFinderSaf::FindNextChord ( const G4FieldTrack &  yStart,
G4double  stepMax,
G4FieldTrack &  yEnd,
G4double &  dyErrPos,
G4double  epsStep,
G4double *  pStepForAccuracy,
const G4ThreeVector  latestSafetyOrigin,
G4double  latestSafetyRadius 
)
virtual

Reimplemented from G4ChordFinder.

Definition at line 117 of file G4ChordFinderSaf.cc.

127 {
128  // G4int stepRKnumber=0;
129  G4FieldTrack yCurrent= yStart;
130  G4double stepTrial, stepForAccuracy;
131  G4double dydx[G4FieldTrack::ncompSVEC];
132 
133  // 1.) Try to "leap" to end of interval
134  // 2.) Evaluate if resulting chord gives d_chord that is good enough.
135  // 2a.) If d_chord is not good enough, find one that is.
136 
137  G4bool validEndPoint= false;
138  G4double dChordStep, lastStepLength; // stepOfLastGoodChord;
139 
140  GetIntegrationDriver()-> GetDerivatives( yCurrent, dydx ) ;
141 
142  unsigned int noTrials=0;
143  const unsigned int maxTrials= 75; // Avoid endless loop for bad convergence
144 
145  const G4double safetyFactor= GetFirstFraction(); // was 0.999
146 
147  // Figure out the starting safety
148  G4double startSafety=
149  CalculatePointSafety( latestSafetyOrigin,
150  latestSafetyRadius,
151  yCurrent.GetPosition() );
152 
153  G4double
154  likelyGood = std::max( startSafety ,
155  safetyFactor * GetLastStepEstimateUnc() );
156 
157  stepTrial = std::min( stepMax, likelyGood );
158 
159  G4MagInt_Driver *pIntgrDriver= G4ChordFinder::GetIntegrationDriver();
160  G4double newStepEst_Uncons= 0.0;
161  G4double stepForChord= -1.0;
162  do
163  {
164  yCurrent = yStart; // Always start from initial point
165 
166  // ************
167  pIntgrDriver->QuickAdvance( yCurrent, dydx, stepTrial,
168  dChordStep, dyErrPos);
169  // ************
170 
171  G4ThreeVector EndPointCand= yCurrent.GetPosition();
172  G4bool endPointInSafetySphere=
173  CalculatePointInside(latestSafetyOrigin, latestSafetyRadius, EndPointCand);
174 
175  // We check whether the criterion is met here.
176  validEndPoint = AcceptableMissDist(dChordStep)
177  || endPointInSafetySphere;
178  // && (dyErrPos < eps) ;
179 
180  lastStepLength = stepTrial;
181 
182  // This method estimates to step size for a good chord.
183  stepForChord = NewStep(stepTrial, dChordStep, newStepEst_Uncons );
184 
185  if( ! validEndPoint ) {
186  if( stepTrial<=0.0 )
187  stepTrial = stepForChord;
188  else if (stepForChord <= stepTrial)
189  // Reduce by a fraction, possibly up to 20%
190  stepTrial = std::min( stepForChord,
191  GetFractionLast() * stepTrial);
192  else
193  stepTrial *= 0.1;
194 
195  // if(dbg) G4cerr<<"Dchord too big. Try new hstep="<<stepTrial<<G4endl;
196  }
197  // #ifdef TEST_CHORD_PRINT
198  // TestChordPrint( noTrials, lastStepLength, dChordStep, stepTrial );
199  // #endif
200 
201  noTrials++;
202  }
203  while( (! validEndPoint) && (noTrials < maxTrials) );
204  // Loop checking, 07.10.2016, J. Apostolakis
205 
206  if( noTrials >= maxTrials )
207  {
208  std::ostringstream message;
209  message << "Exceeded maximum number of trials= " << maxTrials << G4endl
210  << "Current sagita dist= " << dChordStep << G4endl
211  << "Step sizes (actual and proposed): " << G4endl
212  << "Last trial = " << lastStepLength << G4endl
213  << "Next trial = " << stepTrial << G4endl
214  << "Proposed for chord = " << stepForChord << G4endl
215  ;
216  G4Exception("G4ChordFinderSaf::FindNextChord()", "GeomField0003",
217  JustWarning, message);
218  }
219  AccumulateStatistics( noTrials );
220 
221  // Should we update newStepEst_Uncons for a 'long step' via safety ??
222  if( newStepEst_Uncons > 0.0 ){
223  SetLastStepEstimateUnc( newStepEst_Uncons );
224  }
225 
226  // stepOfLastGoodChord = stepTrial;
227 
228  if( pStepForAccuracy ){
229  // Calculate the step size required for accuracy, if it is needed
230  G4double dyErr_relative = dyErrPos/(epsStep*lastStepLength);
231  if( dyErr_relative > 1.0 ) {
232  stepForAccuracy =
233  pIntgrDriver->ComputeNewStepSize( dyErr_relative,
234  lastStepLength );
235  }else{
236  stepForAccuracy = 0.0; // Convention to show step was ok
237  }
238  *pStepForAccuracy = stepForAccuracy;
239  }
240 
241 #ifdef TEST_CHORD_PRINT
242  static int dbg=0;
243  if( dbg )
244  G4cout << "ChordF/FindNextChord: NoTrials= " << noTrials
245  << " StepForGoodChord=" << std::setw(10) << stepTrial << G4endl;
246 #endif
247 
248  yEnd= yCurrent;
249  return stepTrial;
250 }
G4ChordFinder::GetFirstFraction
G4double GetFirstFraction()
G4ChordFinder::SetLastStepEstimateUnc
void SetLastStepEstimateUnc(G4double stepEst)
JustWarning
Definition: G4ExceptionSeverity.hh:64
CalculatePointInside
G4bool CalculatePointInside(G4ThreeVector safetyOrigin, G4double safetyRadius, G4ThreeVector point)
Definition: G4ChordFinderSaf.cc:108
G4FieldTrack::GetPosition
G4ThreeVector GetPosition() const
G4cout
G4GLOB_DLL std::ostream G4cout
G4bool
bool G4bool
Definition: G4Types.hh:79
G4MagInt_Driver
Definition: G4MagIntegratorDriver.hh:48
G4ChordFinder::AcceptableMissDist
G4bool AcceptableMissDist(G4double dChordStep) const
G4ChordFinder::AccumulateStatistics
void AccumulateStatistics(G4int noTrials)
G4Exception
void G4Exception(const char *originOfException, const char *exceptionCode, G4ExceptionSeverity severity, const char *comments)
Definition: G4Exception.cc:41
G4MagInt_Driver::QuickAdvance
G4bool QuickAdvance(G4FieldTrack &y_val, const G4double dydx[], G4double hstep, G4double &dchord_step, G4double &dyerr)
Definition: G4MagIntegratorDriver.cc:663
G4INCL::Math::max
T max(const T t1, const T t2)
brief Return the largest of the two arguments
Definition: G4INCLGlobals.hh:112
G4ChordFinder::NewStep
G4double NewStep(G4double stepTrialOld, G4double dChordStep, G4double &stepEstimate_Unconstrained)
Definition: G4ChordFinder.cc:349
G4INCL::Math::min
T min(const T t1, const T t2)
brief Return the smallest of the two arguments
Definition: G4INCLGlobals.hh:117
G4MagInt_Driver::ComputeNewStepSize
G4double ComputeNewStepSize(G4double errMaxNorm, G4double hstepCurrent)
Definition: G4MagIntegratorDriver.cc:764
G4ChordFinder::GetLastStepEstimateUnc
G4double GetLastStepEstimateUnc()
G4endl
#define G4endl
Definition: G4ios.hh:61
G4double
double G4double
Definition: G4Types.hh:76
G4ChordFinder::GetIntegrationDriver
G4MagInt_Driver * GetIntegrationDriver()
G4ChordFinder::GetFractionLast
G4double GetFractionLast()
CalculatePointSafety
G4double CalculatePointSafety(G4ThreeVector safetyOrigin, G4double safetyRadius, G4ThreeVector point)
Definition: G4ChordFinderSaf.cc:91

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void G4ChordFinderSaf::PrintStatistics ( )
virtual

Reimplemented from G4ChordFinder.

Definition at line 63 of file G4ChordFinderSaf.cc.

64 {
65  // Print Statistics
66  G4cout << "G4ChordFinderSaf statistics report: " << G4endl;
67  G4ChordFinder::PrintStatistics();
68 
69 /*******************
70  G4cout
71  << " No radbig calls " << std::setw(10) << fNoInitialRadBig
72  << " trials " << std::setw(10) << fNoTrialsRadBig
73  << " - over " << std::setw(10) << fNoTrialsRadBig - fNoInitialRadBig
74  << G4endl
75  << " No radsm calls " << std::setw(10) << fNoInitialRadSmall
76  << " trials " << std::setw(10) << fNoTrialsRadSmall
77  << " - over " << std::setw(10) << fNoTrialsRadSmall - fNoInitialRadSmall
78  << G4endl;
79  G4cout
80  << " *** Limiting stepTrial via if Delta_chord < R_curvature "
81  << " for large to angle from Delta_chord / R_curv "
82  << " and for small with multiple " << GetMultipleRadius()
83  << G4endl;
84 ********************/
85 }
G4ChordFinder::PrintStatistics
virtual void PrintStatistics()
Definition: G4ChordFinder.cc:658
G4cout
G4GLOB_DLL std::ostream G4cout
G4endl
#define G4endl
Definition: G4ios.hh:61

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The documentation for this class was generated from the following files: