| 1 | //
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| 2 | // ********************************************************************
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| 3 | // * License and Disclaimer *
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| 4 | // * *
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| 5 | // * The Geant4 software is copyright of the Copyright Holders of *
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| 6 | // * the Geant4 Collaboration. It is provided under the terms and *
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| 7 | // * conditions of the Geant4 Software License, included in the file *
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| 8 | // * LICENSE and available at http://cern.ch/geant4/license . These *
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| 9 | // * include a list of copyright holders. *
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| 10 | // * *
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| 11 | // * Neither the authors of this software system, nor their employing *
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| 12 | // * institutes,nor the agencies providing financial support for this *
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| 13 | // * work make any representation or warranty, express or implied, *
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| 14 | // * regarding this software system or assume any liability for its *
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| 15 | // * use. Please see the license in the file LICENSE and URL above *
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| 16 | // * for the full disclaimer and the limitation of liability. *
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| 17 | // * *
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| 18 | // * This code implementation is the result of the scientific and *
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| 19 | // * technical work of the GEANT4 collaboration. *
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| 20 | // * By using, copying, modifying or distributing the software (or *
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| 21 | // * any work based on the software) you agree to acknowledge its *
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| 22 | // * use in resulting scientific publications, and indicate your *
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| 23 | // * acceptance of all terms of the Geant4 Software license. *
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| 24 | // ********************************************************************
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| 25 | //
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| 26 | //
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| 27 | //
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| 28 | //
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| 29 | // This class implements an algorithm to track a particle in a
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| 30 | // non-uniform magnetic field. It utilises an ODE solver (with
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| 31 | // the Runge - Kutta method) to evolve the particle, and drives it
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| 32 | // until the particle has traveled a set distance or it enters a new
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| 33 | // volume.
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| 34 | //
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| 35 | // 14.10.96 John Apostolakis, design and implementation
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| 36 | // 17.03.97 John Apostolakis, renaming new set functions being added
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| 37 | //
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| 38 | // ---------------------------------------------------------------------------
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| 39 |
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| 40 | #include "G4PropagatorInField.hh"
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| 41 | #include "G4ios.hh"
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| 42 | #include <iomanip>
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| 43 |
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| 44 | #include "G4ThreeVector.hh"
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| 45 | #include "G4VPhysicalVolume.hh"
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| 46 | #include "G4Navigator.hh"
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| 47 | #include "G4GeometryTolerance.hh"
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| 48 | #include "G4VCurvedTrajectoryFilter.hh"
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| 49 | #include "G4ChordFinder.hh"
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| 50 | #include "G4MultiLevelLocator.hh"
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| 51 |
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| 52 | ///////////////////////////////////////////////////////////////////////////
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| 53 | //
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| 54 | // Constructors and destructor
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| 55 |
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| 56 | G4PropagatorInField::G4PropagatorInField( G4Navigator *theNavigator,
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| 57 | G4FieldManager *detectorFieldMgr,
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| 58 | G4VIntersectionLocator *vLocator )
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| 59 | : fDetectorFieldMgr(detectorFieldMgr),
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| 60 | fCurrentFieldMgr(detectorFieldMgr),
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| 61 | fNavigator(theNavigator),
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| 62 | End_PointAndTangent(G4ThreeVector(0.,0.,0.),
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| 63 | G4ThreeVector(0.,0.,0.),0.0,0.0,0.0,0.0,0.0),
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| 64 | fParticleIsLooping(false),
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| 65 | fVerboseLevel(0),
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| 66 | fMax_loop_count(1000),
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| 67 | fNoZeroStep(0),
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| 68 | fCharge(0.0), fInitialMomentumModulus(0.0), fMass(0.0),
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| 69 | fUseSafetyForOptimisation(true), // (false) is less sensitive to incorrect safety
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| 70 | fSetFieldMgr(false),
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| 71 | fpTrajectoryFilter( 0 )
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| 72 | {
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| 73 | if(fDetectorFieldMgr) { fEpsilonStep = fDetectorFieldMgr->GetMaximumEpsilonStep();}
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| 74 | else { fEpsilonStep= 1.0e-5; }
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| 75 | fActionThreshold_NoZeroSteps = 2;
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| 76 | fSevereActionThreshold_NoZeroSteps = 10;
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| 77 | fAbandonThreshold_NoZeroSteps = 50;
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| 78 | fFull_CurveLen_of_LastAttempt = -1;
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| 79 | fLast_ProposedStepLength = -1;
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| 80 | fLargestAcceptableStep = 1000.0 * meter;
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| 81 |
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| 82 | fPreviousSftOrigin= G4ThreeVector(0.,0.,0.);
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| 83 | fPreviousSafety= 0.0;
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| 84 | kCarTolerance = G4GeometryTolerance::GetInstance()->GetSurfaceTolerance();
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| 85 |
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| 86 | // Definding Intersection Locator and his parameters
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| 87 | if(vLocator==0){
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| 88 | fIntersectionLocator= new G4MultiLevelLocator(theNavigator);
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| 89 | fAllocatedLocator=true;
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| 90 | }else{
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| 91 | fIntersectionLocator=vLocator;
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| 92 | fAllocatedLocator=false;
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| 93 | }
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| 94 | fIntersectionLocator->SetEpsilonStepFor(fEpsilonStep);
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| 95 | fIntersectionLocator->SetDeltaIntersectionFor(GetDeltaIntersection());
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| 96 | fIntersectionLocator->SetChordFinderFor(GetChordFinder());
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| 97 | fIntersectionLocator->SetSafetyParametersFor( fUseSafetyForOptimisation);
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| 98 | }
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| 99 |
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| 100 | G4PropagatorInField::~G4PropagatorInField()
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| 101 | {
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| 102 | if(fAllocatedLocator)delete fIntersectionLocator;
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| 103 | }
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| 104 |
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| 105 | ///////////////////////////////////////////////////////////////////////////
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| 106 | //
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| 107 | // Compute the next geometric Step
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| 108 |
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| 109 | G4double
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| 110 | G4PropagatorInField::ComputeStep(
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| 111 | G4FieldTrack& pFieldTrack,
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| 112 | G4double CurrentProposedStepLength,
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| 113 | G4double& currentSafety, // IN/OUT
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| 114 | G4VPhysicalVolume* pPhysVol)
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| 115 | {
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| 116 |
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| 117 | // If CurrentProposedStepLength is too small for finding Chords
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| 118 | // then return with no action (for now - TODO: some action)
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| 119 | //
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| 120 | if(CurrentProposedStepLength<kCarTolerance)
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| 121 | {
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| 122 | return kInfinity;
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| 123 | }
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| 124 |
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| 125 | // Introducing smooth trajectory display (jacek 01/11/2002)
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| 126 | //
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| 127 | if (fpTrajectoryFilter)
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| 128 | {
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| 129 | fpTrajectoryFilter->CreateNewTrajectorySegment();
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| 130 | }
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| 131 |
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| 132 | // Parameters for adaptive Runge-Kutta integration
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| 133 |
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| 134 | G4double h_TrialStepSize; // 1st Step Size
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| 135 | G4double TruePathLength = CurrentProposedStepLength;
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| 136 | G4double StepTaken = 0.0;
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| 137 | G4double s_length_taken, epsilon ;
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| 138 | G4bool intersects;
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| 139 | G4bool first_substep = true;
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| 140 |
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| 141 | G4double NewSafety;
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| 142 | fParticleIsLooping = false;
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| 143 |
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| 144 | // If not yet done,
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| 145 | // Set the field manager to the local one if the volume has one,
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| 146 | // or to the global one if not
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| 147 | //
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| 148 | if( !fSetFieldMgr ) fCurrentFieldMgr= FindAndSetFieldManager( pPhysVol );
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| 149 | // For the next call, the field manager must again be set
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| 150 | fSetFieldMgr= false;
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| 151 |
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| 152 | GetChordFinder()->SetChargeMomentumMass(fCharge, fInitialMomentumModulus, fMass);
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| 153 |
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| 154 | // Values for Intersection Locator has to be updated on each call
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| 155 | // because the CurrentFieldManager changes
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| 156 | fIntersectionLocator->SetChordFinderFor(GetChordFinder());
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| 157 | fIntersectionLocator->SetSafetyParametersFor( fUseSafetyForOptimisation);
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| 158 | fIntersectionLocator->SetEpsilonStepFor(fEpsilonStep);
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| 159 | fIntersectionLocator->SetDeltaIntersectionFor(GetDeltaIntersection());
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| 160 |
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| 161 | G4FieldTrack CurrentState(pFieldTrack);
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| 162 | G4FieldTrack OriginalState = CurrentState;
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| 163 |
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| 164 | // If the Step length is "infinite", then an approximate-maximum Step
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| 165 | // length (used to calculate the relative accuracy) must be guessed.
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| 166 | //
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| 167 | if( CurrentProposedStepLength >= fLargestAcceptableStep )
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| 168 | {
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| 169 | G4ThreeVector StartPointA, VelocityUnit;
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| 170 | StartPointA = pFieldTrack.GetPosition();
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| 171 | VelocityUnit = pFieldTrack.GetMomentumDir();
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| 172 |
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| 173 | G4double trialProposedStep = 1.e2 * ( 10.0 * cm +
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| 174 | fNavigator->GetWorldVolume()->GetLogicalVolume()->
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| 175 | GetSolid()->DistanceToOut(StartPointA, VelocityUnit) );
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| 176 | CurrentProposedStepLength= std::min( trialProposedStep,
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| 177 | fLargestAcceptableStep );
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| 178 | }
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| 179 | epsilon = GetDeltaOneStep() / CurrentProposedStepLength;
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| 180 | // G4double raw_epsilon= epsilon;
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| 181 | G4double epsilonMin= fCurrentFieldMgr->GetMinimumEpsilonStep();
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| 182 | G4double epsilonMax= fCurrentFieldMgr->GetMaximumEpsilonStep();;
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| 183 | if( epsilon < epsilonMin ) epsilon = epsilonMin;
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| 184 | if( epsilon > epsilonMax ) epsilon = epsilonMax;
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| 185 | SetEpsilonStep( epsilon );
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| 186 |
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| 187 | // G4cout << "G4PiF: Epsilon of current step - raw= " << raw_epsilon
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| 188 | // << " final= " << epsilon << G4endl;
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| 189 |
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| 190 | // Shorten the proposed step in case of earlier problems (zero steps)
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| 191 | //
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| 192 | if( fNoZeroStep > fActionThreshold_NoZeroSteps )
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| 193 | {
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| 194 | G4double stepTrial;
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| 195 |
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| 196 | stepTrial= fFull_CurveLen_of_LastAttempt;
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| 197 | if( (stepTrial <= 0.0) && (fLast_ProposedStepLength > 0.0) )
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| 198 | stepTrial= fLast_ProposedStepLength;
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| 199 |
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| 200 | G4double decreaseFactor = 0.9; // Unused default
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| 201 | if( (fNoZeroStep < fSevereActionThreshold_NoZeroSteps)
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| 202 | && (stepTrial > 1000.0*kCarTolerance) )
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| 203 | {
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| 204 | // Ensure quicker convergence
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| 205 | //
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| 206 | decreaseFactor= 0.1;
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| 207 | }
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| 208 | else
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| 209 | {
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| 210 | // We are in significant difficulties, probably at a boundary that
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| 211 | // is either geometrically sharp or between very different materials.
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| 212 | // Careful decreases to cope with tolerance are required.
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| 213 | //
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| 214 | if( stepTrial > 1000.0*kCarTolerance )
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| 215 | decreaseFactor = 0.25; // Try slow decreases
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| 216 | else if( stepTrial > 100.0*kCarTolerance )
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| 217 | decreaseFactor= 0.5; // Try slower decreases
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| 218 | else if( stepTrial > 10.0*kCarTolerance )
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| 219 | decreaseFactor= 0.75; // Try even slower decreases
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| 220 | else
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| 221 | decreaseFactor= 0.9; // Try very slow decreases
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| 222 | }
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| 223 | stepTrial *= decreaseFactor;
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| 224 |
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| 225 | #ifdef G4DEBUG_FIELD
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| 226 | PrintStepLengthDiagnostic(CurrentProposedStepLength, decreaseFactor,
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| 227 | stepTrial, pFieldTrack);
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| 228 | #endif
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| 229 | if( stepTrial == 0.0 )
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| 230 | {
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| 231 | G4cout << " G4PropagatorInField::ComputeStep "
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| 232 | << " Particle abandoned due to lack of progress in field."
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| 233 | << G4endl
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| 234 | << " Properties : " << pFieldTrack << " "
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| 235 | << G4endl;
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| 236 | G4cerr << " G4PropagatorInField::ComputeStep "
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| 237 | << " ERROR : attempting a zero step= " << stepTrial << G4endl
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| 238 | << " while attempting to progress after " << fNoZeroStep
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| 239 | << " trial steps. Will abandon step." << G4endl;
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| 240 | fParticleIsLooping= true;
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| 241 | return 0; // = stepTrial;
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| 242 | }
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| 243 | if( stepTrial < CurrentProposedStepLength )
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| 244 | CurrentProposedStepLength = stepTrial;
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| 245 | }
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| 246 | fLast_ProposedStepLength = CurrentProposedStepLength;
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| 247 |
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| 248 | G4int do_loop_count = 0;
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| 249 | do
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| 250 | {
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| 251 | G4FieldTrack SubStepStartState = CurrentState;
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| 252 | G4ThreeVector SubStartPoint = CurrentState.GetPosition();
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| 253 |
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| 254 | if( !first_substep) {
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| 255 | fNavigator->LocateGlobalPointWithinVolume( SubStartPoint );
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| 256 | }
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| 257 |
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| 258 | // How far to attempt to move the particle !
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| 259 | //
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| 260 | h_TrialStepSize = CurrentProposedStepLength - StepTaken;
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| 261 |
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| 262 | // Integrate as far as "chord miss" rule allows.
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| 263 | //
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| 264 | s_length_taken = GetChordFinder()->AdvanceChordLimited(
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| 265 | CurrentState, // Position & velocity
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| 266 | h_TrialStepSize,
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| 267 | fEpsilonStep,
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| 268 | fPreviousSftOrigin,
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| 269 | fPreviousSafety
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| 270 | );
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| 271 | // CurrentState is now updated with the final position and velocity.
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| 272 |
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| 273 | fFull_CurveLen_of_LastAttempt = s_length_taken;
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| 274 |
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| 275 | G4ThreeVector EndPointB = CurrentState.GetPosition();
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| 276 | G4ThreeVector InterSectionPointE;
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| 277 | G4double LinearStepLength;
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| 278 |
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| 279 | // Intersect chord AB with geometry
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| 280 | intersects= IntersectChord( SubStartPoint, EndPointB,
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| 281 | NewSafety, LinearStepLength,
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| 282 | InterSectionPointE );
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| 283 | // E <- Intersection Point of chord AB and either volume A's surface
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| 284 | // or a daughter volume's surface ..
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| 285 |
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| 286 | if( first_substep ) {
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| 287 | currentSafety = NewSafety;
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| 288 | } // Updating safety in other steps is potential future extention
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| 289 |
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| 290 | if( intersects )
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| 291 | {
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| 292 | G4FieldTrack IntersectPointVelct_G(CurrentState); // FT-Def-Construct
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| 293 |
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| 294 | // Find the intersection point of AB true path with the surface
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| 295 | // of vol(A), if it exists. Start with point E as first "estimate".
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| 296 | G4bool recalculatedEndPt= false;
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| 297 |
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| 298 | G4bool found_intersection = fIntersectionLocator->
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| 299 | EstimateIntersectionPoint( SubStepStartState, CurrentState,
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| 300 | InterSectionPointE, IntersectPointVelct_G,
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| 301 | recalculatedEndPt,fPreviousSafety,fPreviousSftOrigin);
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| 302 | intersects = intersects && found_intersection;
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| 303 | if( found_intersection ) {
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| 304 | End_PointAndTangent= IntersectPointVelct_G; // G is our EndPoint ...
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| 305 | StepTaken = TruePathLength = IntersectPointVelct_G.GetCurveLength()
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| 306 | - OriginalState.GetCurveLength();
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| 307 | } else {
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| 308 | // intersects= false; // "Minor" chords do not intersect
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| 309 | if( recalculatedEndPt ){
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| 310 | CurrentState= IntersectPointVelct_G;
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| 311 | }
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| 312 | }
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| 313 | }
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| 314 | if( !intersects )
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| 315 | {
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| 316 | StepTaken += s_length_taken;
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| 317 | // For smooth trajectory display (jacek 01/11/2002)
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| 318 | if (fpTrajectoryFilter) {
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| 319 | fpTrajectoryFilter->TakeIntermediatePoint(CurrentState.GetPosition());
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| 320 | }
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| 321 | }
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| 322 | first_substep = false;
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| 323 |
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| 324 | #ifdef G4DEBUG_FIELD
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| 325 | if( fNoZeroStep > fActionThreshold_NoZeroSteps ) {
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| 326 | printStatus( SubStepStartState, // or OriginalState,
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| 327 | CurrentState, CurrentProposedStepLength,
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| 328 | NewSafety, do_loop_count, pPhysVol );
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| 329 | }
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| 330 | #endif
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| 331 | #ifdef G4VERBOSE
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| 332 | if( (fVerboseLevel > 1) && (do_loop_count > fMax_loop_count-10 )) {
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| 333 | if( do_loop_count == fMax_loop_count-9 ){
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| 334 | G4cout << "G4PropagatorInField::ComputeStep "
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| 335 | << " Difficult track - taking many sub steps." << G4endl;
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| 336 | }
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| 337 | printStatus( SubStepStartState, CurrentState, CurrentProposedStepLength,
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| 338 | NewSafety, do_loop_count, pPhysVol );
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| 339 | }
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| 340 | #endif
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| 341 |
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| 342 | do_loop_count++;
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| 343 |
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| 344 | } while( (!intersects )
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| 345 | && (StepTaken + kCarTolerance < CurrentProposedStepLength)
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| 346 | && ( do_loop_count < fMax_loop_count ) );
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| 347 |
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| 348 | if( do_loop_count >= fMax_loop_count )
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| 349 | {
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| 350 | fParticleIsLooping = true;
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| 351 |
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| 352 | if ( fVerboseLevel > 0 ){
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| 353 | G4cout << "G4PropagateInField: Killing looping particle "
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| 354 | // << " of " << energy << " energy "
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| 355 | << " after " << do_loop_count << " field substeps "
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| 356 | << " totaling " << StepTaken / mm << " mm " ;
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| 357 | if( pPhysVol )
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| 358 | G4cout << " in the volume " << pPhysVol->GetName() ;
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| 359 | else
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| 360 | G4cout << " in unknown or null volume. " ;
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| 361 | G4cout << G4endl;
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| 362 | }
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| 363 | }
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| 364 |
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| 365 | if( !intersects )
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| 366 | {
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| 367 | // Chord AB or "minor chords" do not intersect
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| 368 | // B is the endpoint Step of the current Step.
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| 369 | //
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| 370 | End_PointAndTangent = CurrentState;
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| 371 | TruePathLength = StepTaken;
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| 372 | }
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| 373 |
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| 374 | // Set pFieldTrack to the return value
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| 375 | //
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| 376 | pFieldTrack = End_PointAndTangent;
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| 377 |
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| 378 | #ifdef G4VERBOSE
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| 379 | // Check that "s" is correct
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| 380 | //
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| 381 | if( std::fabs(OriginalState.GetCurveLength() + TruePathLength
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| 382 | - End_PointAndTangent.GetCurveLength()) > 3.e-4 * TruePathLength )
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| 383 | {
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| 384 | G4cerr << " ERROR - G4PropagatorInField::ComputeStep():" << G4endl
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| 385 | << " Curve length mis-match, is advancement wrong ? " << G4endl;
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| 386 | G4cerr << " The curve length of the endpoint should be: "
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| 387 | << OriginalState.GetCurveLength() + TruePathLength << G4endl
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| 388 | << " and it is instead: "
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| 389 | << End_PointAndTangent.GetCurveLength() << "." << G4endl
|
|---|
| 390 | << " A difference of: "
|
|---|
| 391 | << OriginalState.GetCurveLength() + TruePathLength
|
|---|
| 392 | - End_PointAndTangent.GetCurveLength() << G4endl;
|
|---|
| 393 | G4cerr << " Original state= " << OriginalState << G4endl
|
|---|
| 394 | << " Proposed state= " << End_PointAndTangent << G4endl;
|
|---|
| 395 | G4Exception("G4PropagatorInField::ComputeStep()", "IncorrectProposedEndPoint",
|
|---|
| 396 | FatalException,
|
|---|
| 397 | "Curve length mis-match between original state and proposed endpoint of propagation.");
|
|---|
| 398 | }
|
|---|
| 399 | #endif
|
|---|
| 400 |
|
|---|
| 401 | // In particular anomalous cases, we can get repeated zero steps
|
|---|
| 402 | // In order to correct this efficiently, we identify these cases
|
|---|
| 403 | // and only take corrective action when they occur.
|
|---|
| 404 | //
|
|---|
| 405 | if( TruePathLength < 0.5*kCarTolerance )
|
|---|
| 406 | fNoZeroStep++;
|
|---|
| 407 | else
|
|---|
| 408 | fNoZeroStep = 0;
|
|---|
| 409 |
|
|---|
| 410 | if( fNoZeroStep > fAbandonThreshold_NoZeroSteps ) {
|
|---|
| 411 | fParticleIsLooping = true;
|
|---|
| 412 | G4cout << " WARNING - G4PropagatorInField::ComputeStep():" << G4endl
|
|---|
| 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;
|
|---|
| 425 | fNoZeroStep = 0;
|
|---|
| 426 | }
|
|---|
| 427 |
|
|---|
| 428 | return TruePathLength;
|
|---|
| 429 | }
|
|---|
| 430 |
|
|---|
| 431 | ///////////////////////////////////////////////////////////////////////////
|
|---|
| 432 | //
|
|---|
| 433 | // Dumps status of propagator.
|
|---|
| 434 |
|
|---|
| 435 | void
|
|---|
| 436 | G4PropagatorInField::printStatus( const G4FieldTrack& StartFT,
|
|---|
| 437 | const G4FieldTrack& CurrentFT,
|
|---|
| 438 | G4double requestStep,
|
|---|
| 439 | G4double safety,
|
|---|
| 440 | G4int stepNo,
|
|---|
| 441 | G4VPhysicalVolume* startVolume)
|
|---|
| 442 | {
|
|---|
| 443 | const G4int verboseLevel= fVerboseLevel;
|
|---|
| 444 | const G4ThreeVector StartPosition = StartFT.GetPosition();
|
|---|
| 445 | const G4ThreeVector StartUnitVelocity = StartFT.GetMomentumDir();
|
|---|
| 446 | const G4ThreeVector CurrentPosition = CurrentFT.GetPosition();
|
|---|
| 447 | const G4ThreeVector CurrentUnitVelocity = CurrentFT.GetMomentumDir();
|
|---|
| 448 |
|
|---|
| 449 | G4double step_len = CurrentFT.GetCurveLength() - StartFT.GetCurveLength();
|
|---|
| 450 |
|
|---|
| 451 | if( ((stepNo == 0) && (verboseLevel <3))
|
|---|
| 452 | || (verboseLevel >= 3) )
|
|---|
| 453 | {
|
|---|
| 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;
|
|---|
| 460 | G4cout << std::setw( 5) << "Step#"
|
|---|
| 461 | << std::setw(10) << " s " << " "
|
|---|
| 462 | << std::setw(10) << "X(mm)" << " "
|
|---|
| 463 | << std::setw(10) << "Y(mm)" << " "
|
|---|
| 464 | << std::setw(10) << "Z(mm)" << " "
|
|---|
| 465 | << std::setw( 7) << " N_x " << " "
|
|---|
| 466 | << std::setw( 7) << " N_y " << " "
|
|---|
| 467 | << std::setw( 7) << " N_z " << " " ;
|
|---|
| 468 | // << G4endl;
|
|---|
| 469 | G4cout // << " >>> "
|
|---|
| 470 | << std::setw( 7) << " Delta|N|" << " "
|
|---|
| 471 | // << std::setw( 7) << " Delta(N_z) " << " "
|
|---|
| 472 | << std::setw( 9) << "StepLen" << " "
|
|---|
| 473 | << std::setw(12) << "StartSafety" << " "
|
|---|
| 474 | << std::setw( 9) << "PhsStep" << " ";
|
|---|
| 475 | if( startVolume ) {
|
|---|
| 476 | G4cout << std::setw(18) << "NextVolume" << " ";
|
|---|
| 477 | }
|
|---|
| 478 | G4cout << G4endl;
|
|---|
| 479 | }
|
|---|
| 480 | if((stepNo == 0) && (verboseLevel <=3)){
|
|---|
| 481 | // Recurse to print the start values
|
|---|
| 482 | //
|
|---|
| 483 | printStatus( StartFT, StartFT, -1.0, safety, -1, startVolume);
|
|---|
| 484 | }
|
|---|
| 485 | if( verboseLevel <= 3 )
|
|---|
| 486 | {
|
|---|
| 487 | if( stepNo >= 0)
|
|---|
| 488 | G4cout << std::setw( 4) << stepNo << " ";
|
|---|
| 489 | else
|
|---|
| 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 | }
|
|---|
| 541 | }
|
|---|
| 542 |
|
|---|
| 543 | ///////////////////////////////////////////////////////////////////////////
|
|---|
| 544 | //
|
|---|
| 545 | // Prints Step diagnostics
|
|---|
| 546 |
|
|---|
| 547 | void
|
|---|
| 548 | G4PropagatorInField::PrintStepLengthDiagnostic(
|
|---|
| 549 | G4double CurrentProposedStepLength,
|
|---|
| 550 | G4double decreaseFactor,
|
|---|
| 551 | G4double stepTrial,
|
|---|
| 552 | const G4FieldTrack& )
|
|---|
| 553 | {
|
|---|
| 554 | G4cout << " PiF: NoZeroStep= " << fNoZeroStep
|
|---|
| 555 | << " CurrentProposedStepLength= " << CurrentProposedStepLength
|
|---|
| 556 | << " Full_curvelen_last=" << fFull_CurveLen_of_LastAttempt
|
|---|
| 557 | << " last proposed step-length= " << fLast_ProposedStepLength
|
|---|
| 558 | << " decreate factor = " << decreaseFactor
|
|---|
| 559 | << " step trial = " << stepTrial
|
|---|
| 560 | << G4endl;
|
|---|
| 561 | }
|
|---|
| 562 |
|
|---|
| 563 | // Access the points which have passed through the filter. The
|
|---|
| 564 | // points are stored as ThreeVectors for the initial impelmentation
|
|---|
| 565 | // only (jacek 30/10/2002)
|
|---|
| 566 | // Responsibility for deleting the points lies with
|
|---|
| 567 | // SmoothTrajectoryPoint, which is the points' final
|
|---|
| 568 | // destination. The points pointer is set to NULL, to ensure that
|
|---|
| 569 | // the points are not re-used in subsequent steps, therefore THIS
|
|---|
| 570 | // METHOD MUST BE CALLED EXACTLY ONCE PER STEP. (jacek 08/11/2002)
|
|---|
| 571 |
|
|---|
| 572 | std::vector<G4ThreeVector>*
|
|---|
| 573 | G4PropagatorInField::GimmeTrajectoryVectorAndForgetIt() const
|
|---|
| 574 | {
|
|---|
| 575 | // NB, GimmeThePointsAndForgetThem really forgets them, so it can
|
|---|
| 576 | // only be called (exactly) once for each step.
|
|---|
| 577 |
|
|---|
| 578 | if (fpTrajectoryFilter)
|
|---|
| 579 | {
|
|---|
| 580 | return fpTrajectoryFilter->GimmeThePointsAndForgetThem();
|
|---|
| 581 | }
|
|---|
| 582 | else
|
|---|
| 583 | {
|
|---|
| 584 | return 0;
|
|---|
| 585 | }
|
|---|
| 586 | }
|
|---|
| 587 |
|
|---|
| 588 | void
|
|---|
| 589 | G4PropagatorInField::SetTrajectoryFilter(G4VCurvedTrajectoryFilter* filter)
|
|---|
| 590 | {
|
|---|
| 591 | fpTrajectoryFilter = filter;
|
|---|
| 592 | }
|
|---|
| 593 |
|
|---|
| 594 | void G4PropagatorInField::ClearPropagatorState()
|
|---|
| 595 | {
|
|---|
| 596 | // Goal: Clear all memory of previous steps, cached information
|
|---|
| 597 |
|
|---|
| 598 | fParticleIsLooping= false;
|
|---|
| 599 | fNoZeroStep= 0;
|
|---|
| 600 |
|
|---|
| 601 | End_PointAndTangent= G4FieldTrack( G4ThreeVector(0.,0.,0.),
|
|---|
| 602 | G4ThreeVector(0.,0.,0.),
|
|---|
| 603 | 0.0,0.0,0.0,0.0,0.0);
|
|---|
| 604 | fFull_CurveLen_of_LastAttempt = -1;
|
|---|
| 605 | fLast_ProposedStepLength = -1;
|
|---|
| 606 |
|
|---|
| 607 | fPreviousSftOrigin= G4ThreeVector(0.,0.,0.);
|
|---|
| 608 | fPreviousSafety= 0.0;
|
|---|
| 609 | }
|
|---|
| 610 |
|
|---|
| 611 | G4FieldManager* G4PropagatorInField::
|
|---|
| 612 | FindAndSetFieldManager( G4VPhysicalVolume* pCurrentPhysicalVolume)
|
|---|
| 613 | {
|
|---|
| 614 | G4FieldManager* currentFieldMgr;
|
|---|
| 615 |
|
|---|
| 616 | currentFieldMgr = fDetectorFieldMgr;
|
|---|
| 617 | if( pCurrentPhysicalVolume)
|
|---|
| 618 | {
|
|---|
| 619 | G4FieldManager *newFieldMgr = 0;
|
|---|
| 620 | newFieldMgr= pCurrentPhysicalVolume->GetLogicalVolume()->GetFieldManager();
|
|---|
| 621 | if ( newFieldMgr )
|
|---|
| 622 | currentFieldMgr = newFieldMgr;
|
|---|
| 623 | }
|
|---|
| 624 | fCurrentFieldMgr= currentFieldMgr;
|
|---|
| 625 |
|
|---|
| 626 | // Flag that field manager has been set.
|
|---|
| 627 | fSetFieldMgr= true;
|
|---|
| 628 |
|
|---|
| 629 | return currentFieldMgr;
|
|---|
| 630 | }
|
|---|
| 631 |
|
|---|
| 632 | G4int G4PropagatorInField::SetVerboseLevel( G4int level )
|
|---|
| 633 | {
|
|---|
| 634 | G4int oldval= fVerboseLevel;
|
|---|
| 635 | fVerboseLevel= level;
|
|---|
| 636 |
|
|---|
| 637 | // Forward the verbose level 'reduced' to ChordFinder,
|
|---|
| 638 | // MagIntegratorDriver ... ?
|
|---|
| 639 | //
|
|---|
| 640 | G4MagInt_Driver* integrDriver= GetChordFinder()->GetIntegrationDriver();
|
|---|
| 641 | integrDriver->SetVerboseLevel( fVerboseLevel - 2 );
|
|---|
| 642 | G4cout << "Set Driver verbosity to " << fVerboseLevel - 2 << G4endl;
|
|---|
| 643 |
|
|---|
| 644 | return oldval;
|
|---|
| 645 | }
|
|---|
