| 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 | // $Id: G4PropagatorInField.cc,v 1.52 2010/07/13 15:59:42 gcosmo Exp $
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| 39 | // GEANT4 tag $ Name: $
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| 40 | // ---------------------------------------------------------------------------
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| 41 |
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| 42 | #include "G4PropagatorInField.hh"
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| 43 | #include "G4ios.hh"
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| 44 | #include <iomanip>
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| 45 |
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| 46 | #include "G4ThreeVector.hh"
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| 47 | #include "G4VPhysicalVolume.hh"
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| 48 | #include "G4Navigator.hh"
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| 49 | #include "G4GeometryTolerance.hh"
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| 50 | #include "G4VCurvedTrajectoryFilter.hh"
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| 51 | #include "G4ChordFinder.hh"
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| 52 | #include "G4MultiLevelLocator.hh"
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| 53 |
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| 54 | ///////////////////////////////////////////////////////////////////////////
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| 55 | //
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| 56 | // Constructors and destructor
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| 57 |
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| 58 | G4PropagatorInField::G4PropagatorInField( G4Navigator *theNavigator,
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| 59 | G4FieldManager *detectorFieldMgr,
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| 60 | G4VIntersectionLocator *vLocator )
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| 61 | : fDetectorFieldMgr(detectorFieldMgr),
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| 62 | fCurrentFieldMgr(detectorFieldMgr),
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| 63 | fNavigator(theNavigator),
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| 64 | End_PointAndTangent(G4ThreeVector(0.,0.,0.),
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| 65 | G4ThreeVector(0.,0.,0.),0.0,0.0,0.0,0.0,0.0),
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| 66 | fParticleIsLooping(false),
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| 67 | fVerboseLevel(0),
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| 68 | fMax_loop_count(1000),
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| 69 | fNoZeroStep(0),
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| 70 | fCharge(0.0), fInitialMomentumModulus(0.0), fMass(0.0),
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| 71 | fUseSafetyForOptimisation(true), // (false) is less sensitive to incorrect safety
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| 72 | fSetFieldMgr(false),
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| 73 | fZeroStepThreshold( 0.0 ),
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| 74 | fpTrajectoryFilter( 0 )
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| 75 | {
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| 76 | if(fDetectorFieldMgr) { fEpsilonStep = fDetectorFieldMgr->GetMaximumEpsilonStep();}
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| 77 | else { fEpsilonStep= 1.0e-5; }
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| 78 | fActionThreshold_NoZeroSteps = 2;
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| 79 | fSevereActionThreshold_NoZeroSteps = 10;
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| 80 | fAbandonThreshold_NoZeroSteps = 50;
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| 81 | fFull_CurveLen_of_LastAttempt = -1;
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| 82 | fLast_ProposedStepLength = -1;
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| 83 | fLargestAcceptableStep = 1000.0 * meter;
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| 84 |
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| 85 | fPreviousSftOrigin= G4ThreeVector(0.,0.,0.);
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| 86 | fPreviousSafety= 0.0;
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| 87 | kCarTolerance = G4GeometryTolerance::GetInstance()->GetSurfaceTolerance();
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| 88 | fZeroStepThreshold= std::max( 1.0e5 * kCarTolerance, 1.0e-1 * micrometer ) ;
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| 89 | #ifdef G4DEBUG_FIELD
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| 90 | G4cout << " PiF: Zero Step Threshold set to " << fZeroStepThreshold / millimeter
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| 91 | << " mm." << G4endl;
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| 92 | G4cout << " PiF: Value of kCarTolerance = " << kCarTolerance / millimeter
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| 93 | << " mm. " << G4endl;
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| 94 | #endif
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| 95 |
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| 96 | // Definding Intersection Locator and his parameters
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| 97 | if(vLocator==0){
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| 98 | fIntersectionLocator= new G4MultiLevelLocator(theNavigator);
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| 99 | fAllocatedLocator=true;
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| 100 | }else{
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| 101 | fIntersectionLocator=vLocator;
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| 102 | fAllocatedLocator=false;
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| 103 | }
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| 104 | RefreshIntersectionLocator(); // Copy all relevant parameters
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| 105 | }
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| 106 |
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| 107 | G4PropagatorInField::~G4PropagatorInField()
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| 108 | {
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| 109 | if(fAllocatedLocator)delete fIntersectionLocator;
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| 110 | }
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| 111 |
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| 112 | // Update the IntersectionLocator with current parameters
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| 113 | void
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| 114 | G4PropagatorInField::RefreshIntersectionLocator()
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| 115 | {
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| 116 | fIntersectionLocator->SetEpsilonStepFor(fEpsilonStep);
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| 117 | fIntersectionLocator->SetDeltaIntersectionFor(fCurrentFieldMgr->GetDeltaIntersection());
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| 118 | fIntersectionLocator->SetChordFinderFor(GetChordFinder());
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| 119 | fIntersectionLocator->SetSafetyParametersFor( fUseSafetyForOptimisation);
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| 120 | }
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| 121 | ///////////////////////////////////////////////////////////////////////////
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| 122 | //
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| 123 | // Compute the next geometric Step
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| 124 |
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| 125 | G4double
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| 126 | G4PropagatorInField::ComputeStep(
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| 127 | G4FieldTrack& pFieldTrack,
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| 128 | G4double CurrentProposedStepLength,
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| 129 | G4double& currentSafety, // IN/OUT
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| 130 | G4VPhysicalVolume* pPhysVol)
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| 131 | {
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| 132 | // If CurrentProposedStepLength is too small for finding Chords
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| 133 | // then return with no action (for now - TODO: some action)
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| 134 | //
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| 135 | if(CurrentProposedStepLength<kCarTolerance)
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| 136 | {
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| 137 | return kInfinity;
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| 138 | }
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| 139 |
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| 140 | // Introducing smooth trajectory display (jacek 01/11/2002)
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| 141 | //
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| 142 | if (fpTrajectoryFilter)
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| 143 | {
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| 144 | fpTrajectoryFilter->CreateNewTrajectorySegment();
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| 145 | }
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| 146 |
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| 147 | // Parameters for adaptive Runge-Kutta integration
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| 148 |
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| 149 | G4double h_TrialStepSize; // 1st Step Size
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| 150 | G4double TruePathLength = CurrentProposedStepLength;
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| 151 | G4double StepTaken = 0.0;
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| 152 | G4double s_length_taken, epsilon ;
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| 153 | G4bool intersects;
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| 154 | G4bool first_substep = true;
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| 155 |
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| 156 | G4double NewSafety;
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| 157 | fParticleIsLooping = false;
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| 158 |
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| 159 | // If not yet done,
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| 160 | // Set the field manager to the local one if the volume has one,
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| 161 | // or to the global one if not
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| 162 | //
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| 163 | if( !fSetFieldMgr ) fCurrentFieldMgr= FindAndSetFieldManager( pPhysVol );
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| 164 | // For the next call, the field manager must again be set
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| 165 | fSetFieldMgr= false;
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| 166 |
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| 167 | GetChordFinder()->SetChargeMomentumMass(fCharge, fInitialMomentumModulus, fMass);
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| 168 |
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| 169 | // Values for Intersection Locator has to be updated on each call for the
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| 170 | // case that CurrentFieldManager has changed from the one of previous step
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| 171 | RefreshIntersectionLocator();
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| 172 |
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| 173 | G4FieldTrack CurrentState(pFieldTrack);
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| 174 | G4FieldTrack OriginalState = CurrentState;
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| 175 |
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| 176 | // If the Step length is "infinite", then an approximate-maximum Step
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| 177 | // length (used to calculate the relative accuracy) must be guessed.
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| 178 | //
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| 179 | if( CurrentProposedStepLength >= fLargestAcceptableStep )
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| 180 | {
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| 181 | G4ThreeVector StartPointA, VelocityUnit;
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| 182 | StartPointA = pFieldTrack.GetPosition();
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| 183 | VelocityUnit = pFieldTrack.GetMomentumDir();
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| 184 |
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| 185 | G4double trialProposedStep = 1.e2 * ( 10.0 * cm +
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| 186 | fNavigator->GetWorldVolume()->GetLogicalVolume()->
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| 187 | GetSolid()->DistanceToOut(StartPointA, VelocityUnit) );
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| 188 | CurrentProposedStepLength= std::min( trialProposedStep,
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| 189 | fLargestAcceptableStep );
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| 190 | }
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| 191 | epsilon = fCurrentFieldMgr->GetDeltaOneStep() / CurrentProposedStepLength;
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| 192 | // G4double raw_epsilon= epsilon;
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| 193 | G4double epsilonMin= fCurrentFieldMgr->GetMinimumEpsilonStep();
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| 194 | G4double epsilonMax= fCurrentFieldMgr->GetMaximumEpsilonStep();;
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| 195 | if( epsilon < epsilonMin ) epsilon = epsilonMin;
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| 196 | if( epsilon > epsilonMax ) epsilon = epsilonMax;
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| 197 | SetEpsilonStep( epsilon );
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| 198 |
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| 199 | // G4cout << "G4PiF: Epsilon of current step - raw= " << raw_epsilon
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| 200 | // << " final= " << epsilon << G4endl;
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| 201 |
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| 202 | // Shorten the proposed step in case of earlier problems (zero steps)
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| 203 | //
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| 204 | if( fNoZeroStep > fActionThreshold_NoZeroSteps )
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| 205 | {
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| 206 | G4double stepTrial;
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| 207 |
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| 208 | stepTrial= fFull_CurveLen_of_LastAttempt;
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| 209 | if( (stepTrial <= 0.0) && (fLast_ProposedStepLength > 0.0) )
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| 210 | stepTrial= fLast_ProposedStepLength;
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| 211 |
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| 212 | G4double decreaseFactor = 0.9; // Unused default
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| 213 | if( (fNoZeroStep < fSevereActionThreshold_NoZeroSteps)
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| 214 | && (stepTrial > 100.0*fZeroStepThreshold) )
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| 215 | {
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| 216 | // Attempt quick convergence
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| 217 | //
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| 218 | decreaseFactor= 0.25;
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| 219 | }
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| 220 | else
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| 221 | {
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| 222 | // We are in significant difficulties, probably at a boundary that
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| 223 | // is either geometrically sharp or between very different materials.
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| 224 | // Careful decreases to cope with tolerance are required.
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| 225 | //
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| 226 | if( stepTrial > 100.0*fZeroStepThreshold )
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| 227 | decreaseFactor = 0.35; // Try decreasing slower
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| 228 | else if( stepTrial > 100.0*fZeroStepThreshold )
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| 229 | decreaseFactor= 0.5; // Try yet slower decreases
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| 230 | else if( stepTrial > 10.0*fZeroStepThreshold )
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| 231 | decreaseFactor= 0.75; // Try even slower decreases
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| 232 | else
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| 233 | decreaseFactor= 0.9; // Try very slow decreases
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| 234 | }
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| 235 | stepTrial *= decreaseFactor;
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| 236 |
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| 237 | #ifdef G4DEBUG_FIELD
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| 238 | G4cout << " G4PropagatorInField::ComputeStep(): " << G4endl
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| 239 | << " Decreasing step - "
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| 240 | << " decreaseFactor= " << std::setw(8) << decreaseFactor
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| 241 | << " stepTrial = " << std::setw(18) << stepTrial << " "
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| 242 | << " fZeroStepThreshold = " << fZeroStepThreshold << G4endl;
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| 243 | PrintStepLengthDiagnostic(CurrentProposedStepLength, decreaseFactor,
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| 244 | stepTrial, pFieldTrack);
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| 245 | #endif
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| 246 | if( stepTrial == 0.0 ) // Change to make it < 0.1 * kCarTolerance ??
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| 247 | {
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| 248 | G4cout << " G4PropagatorInField::ComputeStep(): " << G4endl
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| 249 | << " Particle abandoned due to lack of progress in field."
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| 250 | << G4endl
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| 251 | << " Properties : " << pFieldTrack << " "
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| 252 | << G4endl;
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| 253 | G4cerr << " G4PropagatorInField::ComputeStep() - ERROR " << G4endl
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| 254 | << " Attempting a zero step = " << stepTrial << G4endl
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| 255 | << " while attempting to progress after " << fNoZeroStep
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| 256 | << " trial steps. Will abandon step." << G4endl;
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| 257 | fParticleIsLooping= true;
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| 258 | return 0; // = stepTrial;
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| 259 | }
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| 260 | if( stepTrial < CurrentProposedStepLength )
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| 261 | CurrentProposedStepLength = stepTrial;
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| 262 | }
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| 263 | fLast_ProposedStepLength = CurrentProposedStepLength;
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| 264 |
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| 265 | G4int do_loop_count = 0;
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| 266 | do
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| 267 | {
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| 268 | G4FieldTrack SubStepStartState = CurrentState;
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| 269 | G4ThreeVector SubStartPoint = CurrentState.GetPosition();
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| 270 |
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| 271 | if( !first_substep) {
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| 272 | fNavigator->LocateGlobalPointWithinVolume( SubStartPoint );
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| 273 | }
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| 274 |
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| 275 | // How far to attempt to move the particle !
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| 276 | //
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| 277 | h_TrialStepSize = CurrentProposedStepLength - StepTaken;
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| 278 |
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| 279 | // Integrate as far as "chord miss" rule allows.
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| 280 | //
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| 281 | s_length_taken = GetChordFinder()->AdvanceChordLimited(
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| 282 | CurrentState, // Position & velocity
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| 283 | h_TrialStepSize,
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| 284 | fEpsilonStep,
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| 285 | fPreviousSftOrigin,
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| 286 | fPreviousSafety
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| 287 | );
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| 288 | // CurrentState is now updated with the final position and velocity.
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| 289 |
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| 290 | fFull_CurveLen_of_LastAttempt = s_length_taken;
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| 291 |
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| 292 | G4ThreeVector EndPointB = CurrentState.GetPosition();
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| 293 | G4ThreeVector InterSectionPointE;
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| 294 | G4double LinearStepLength;
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| 295 |
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| 296 | // Intersect chord AB with geometry
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| 297 | intersects= IntersectChord( SubStartPoint, EndPointB,
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| 298 | NewSafety, LinearStepLength,
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| 299 | InterSectionPointE );
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| 300 | // E <- Intersection Point of chord AB and either volume A's surface
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| 301 | // or a daughter volume's surface ..
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| 302 |
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| 303 | if( first_substep ) {
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| 304 | currentSafety = NewSafety;
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| 305 | } // Updating safety in other steps is potential future extention
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| 306 |
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| 307 | if( intersects )
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| 308 | {
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| 309 | G4FieldTrack IntersectPointVelct_G(CurrentState); // FT-Def-Construct
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| 310 |
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| 311 | // Find the intersection point of AB true path with the surface
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| 312 | // of vol(A), if it exists. Start with point E as first "estimate".
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| 313 | G4bool recalculatedEndPt= false;
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| 314 |
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| 315 | G4bool found_intersection = fIntersectionLocator->
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| 316 | EstimateIntersectionPoint( SubStepStartState, CurrentState,
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| 317 | InterSectionPointE, IntersectPointVelct_G,
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| 318 | recalculatedEndPt,fPreviousSafety,fPreviousSftOrigin);
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| 319 | intersects = intersects && found_intersection;
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| 320 | if( found_intersection ) {
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| 321 | End_PointAndTangent= IntersectPointVelct_G; // G is our EndPoint ...
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| 322 | StepTaken = TruePathLength = IntersectPointVelct_G.GetCurveLength()
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| 323 | - OriginalState.GetCurveLength();
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| 324 | } else {
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| 325 | // intersects= false; // "Minor" chords do not intersect
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| 326 | if( recalculatedEndPt ){
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| 327 | CurrentState= IntersectPointVelct_G;
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| 328 | }
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| 329 | }
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| 330 | }
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| 331 | if( !intersects )
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| 332 | {
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| 333 | StepTaken += s_length_taken;
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| 334 | // For smooth trajectory display (jacek 01/11/2002)
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| 335 | if (fpTrajectoryFilter) {
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| 336 | fpTrajectoryFilter->TakeIntermediatePoint(CurrentState.GetPosition());
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| 337 | }
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| 338 | }
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| 339 | first_substep = false;
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| 340 |
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| 341 | #ifdef G4DEBUG_FIELD
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| 342 | if( fNoZeroStep > fActionThreshold_NoZeroSteps ) {
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| 343 | printStatus( SubStepStartState, // or OriginalState,
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| 344 | CurrentState, CurrentProposedStepLength,
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| 345 | NewSafety, do_loop_count, pPhysVol );
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| 346 | }
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| 347 | #endif
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| 348 | #ifdef G4VERBOSE
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| 349 | if( (fVerboseLevel > 1) && (do_loop_count > fMax_loop_count-10 )) {
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| 350 | if( do_loop_count == fMax_loop_count-9 ){
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| 351 | G4cout << " G4PropagatorInField::ComputeStep(): " << G4endl
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| 352 | << " Difficult track - taking many sub steps." << G4endl;
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| 353 | }
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| 354 | printStatus( SubStepStartState, CurrentState, CurrentProposedStepLength,
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| 355 | NewSafety, do_loop_count, pPhysVol );
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| 356 | }
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| 357 | #endif
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| 358 |
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| 359 | do_loop_count++;
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| 360 |
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| 361 | } while( (!intersects )
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| 362 | && (StepTaken + kCarTolerance < CurrentProposedStepLength)
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| 363 | && ( do_loop_count < fMax_loop_count ) );
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| 364 |
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| 365 | if( do_loop_count >= fMax_loop_count )
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| 366 | {
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| 367 | fParticleIsLooping = true;
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| 368 |
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| 369 | if ( fVerboseLevel > 0 )
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| 370 | {
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| 371 | G4cout << " G4PropagateInField::ComputeStep(): " << G4endl
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| 372 | << " Killing looping particle "
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| 373 | // << " of " << energy << " energy "
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| 374 | << " after " << do_loop_count << " field substeps "
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| 375 | << " totaling " << StepTaken / mm << " mm " ;
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| 376 | if( pPhysVol )
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| 377 | G4cout << " in volume " << pPhysVol->GetName() ;
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| 378 | else
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| 379 | G4cout << " in unknown or null volume. " ;
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| 380 | G4cout << G4endl;
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| 381 | }
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| 382 | }
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| 383 |
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| 384 | if( !intersects )
|
|---|
| 385 | {
|
|---|
| 386 | // Chord AB or "minor chords" do not intersect
|
|---|
| 387 | // B is the endpoint Step of the current Step.
|
|---|
| 388 | //
|
|---|
| 389 | End_PointAndTangent = CurrentState;
|
|---|
| 390 | TruePathLength = StepTaken;
|
|---|
| 391 | }
|
|---|
| 392 |
|
|---|
| 393 | // Set pFieldTrack to the return value
|
|---|
| 394 | //
|
|---|
| 395 | pFieldTrack = End_PointAndTangent;
|
|---|
| 396 |
|
|---|
| 397 | #ifdef G4VERBOSE
|
|---|
| 398 | // Check that "s" is correct
|
|---|
| 399 | //
|
|---|
| 400 | if( std::fabs(OriginalState.GetCurveLength() + TruePathLength
|
|---|
| 401 | - End_PointAndTangent.GetCurveLength()) > 3.e-4 * TruePathLength )
|
|---|
| 402 | {
|
|---|
| 403 | G4cerr << " G4PropagatorInField::ComputeStep() - ERROR" << G4endl
|
|---|
| 404 | << " Curve length mis-match, is advancement wrong ? " << G4endl;
|
|---|
| 405 | G4cerr << " The curve length of the endpoint should be: "
|
|---|
| 406 | << OriginalState.GetCurveLength() + TruePathLength << G4endl
|
|---|
| 407 | << " and it is instead: "
|
|---|
| 408 | << End_PointAndTangent.GetCurveLength() << "." << G4endl
|
|---|
| 409 | << " A difference of: "
|
|---|
| 410 | << OriginalState.GetCurveLength() + TruePathLength
|
|---|
| 411 | - End_PointAndTangent.GetCurveLength() << G4endl;
|
|---|
| 412 | G4cerr << " Original state = " << OriginalState << G4endl
|
|---|
| 413 | << " Proposed state = " << End_PointAndTangent << G4endl;
|
|---|
| 414 | G4Exception("G4PropagatorInField::ComputeStep()",
|
|---|
| 415 | "IncorrectProposedEndPoint", FatalException,
|
|---|
| 416 | "Curve length mis-match between original state and proposed endpoint of propagation.");
|
|---|
| 417 | }
|
|---|
| 418 | #endif
|
|---|
| 419 |
|
|---|
| 420 | // In particular anomalous cases, we can get repeated zero steps
|
|---|
| 421 | // In order to correct this efficiently, we identify these cases
|
|---|
| 422 | // and only take corrective action when they occur.
|
|---|
| 423 | //
|
|---|
| 424 | if( ( (TruePathLength < fZeroStepThreshold)
|
|---|
| 425 | && ( TruePathLength+kCarTolerance < CurrentProposedStepLength )
|
|---|
| 426 | )
|
|---|
| 427 | || ( TruePathLength < 0.5*kCarTolerance )
|
|---|
| 428 | )
|
|---|
| 429 | {
|
|---|
| 430 | fNoZeroStep++;
|
|---|
| 431 | }
|
|---|
| 432 | else{
|
|---|
| 433 | fNoZeroStep = 0;
|
|---|
| 434 | }
|
|---|
| 435 |
|
|---|
| 436 | if( fNoZeroStep > fAbandonThreshold_NoZeroSteps )
|
|---|
| 437 | {
|
|---|
| 438 | fParticleIsLooping = true;
|
|---|
| 439 | G4cout << " G4PropagatorInField::ComputeStep() - WARNING" << G4endl
|
|---|
| 440 | << " Zero progress for " << fNoZeroStep << " attempted steps."
|
|---|
| 441 | << G4endl;
|
|---|
| 442 | G4cout << " Proposed Step is " << CurrentProposedStepLength
|
|---|
| 443 | << " but Step Taken is "<< fFull_CurveLen_of_LastAttempt << G4endl;
|
|---|
| 444 | G4cout << " For Particle with Charge = " << fCharge
|
|---|
| 445 | << " Momentum = "<< fInitialMomentumModulus
|
|---|
| 446 | << " Mass = " << fMass << G4endl;
|
|---|
| 447 | if( pPhysVol )
|
|---|
| 448 | G4cout << " in volume " << pPhysVol->GetName() ;
|
|---|
| 449 | else
|
|---|
| 450 | G4cout << " in unknown or null volume. " ;
|
|---|
| 451 | G4cout << G4endl;
|
|---|
| 452 | if ( fVerboseLevel > 2 )
|
|---|
| 453 | G4cout << " Particle is stuck; it will be killed." << G4endl;
|
|---|
| 454 | fNoZeroStep = 0;
|
|---|
| 455 | }
|
|---|
| 456 |
|
|---|
| 457 | return TruePathLength;
|
|---|
| 458 | }
|
|---|
| 459 |
|
|---|
| 460 | ///////////////////////////////////////////////////////////////////////////
|
|---|
| 461 | //
|
|---|
| 462 | // Dumps status of propagator.
|
|---|
| 463 |
|
|---|
| 464 | void
|
|---|
| 465 | G4PropagatorInField::printStatus( const G4FieldTrack& StartFT,
|
|---|
| 466 | const G4FieldTrack& CurrentFT,
|
|---|
| 467 | G4double requestStep,
|
|---|
| 468 | G4double safety,
|
|---|
| 469 | G4int stepNo,
|
|---|
| 470 | G4VPhysicalVolume* startVolume)
|
|---|
| 471 | {
|
|---|
| 472 | const G4int verboseLevel=fVerboseLevel;
|
|---|
| 473 | const G4ThreeVector StartPosition = StartFT.GetPosition();
|
|---|
| 474 | const G4ThreeVector StartUnitVelocity = StartFT.GetMomentumDir();
|
|---|
| 475 | const G4ThreeVector CurrentPosition = CurrentFT.GetPosition();
|
|---|
| 476 | const G4ThreeVector CurrentUnitVelocity = CurrentFT.GetMomentumDir();
|
|---|
| 477 |
|
|---|
| 478 | G4double step_len = CurrentFT.GetCurveLength() - StartFT.GetCurveLength();
|
|---|
| 479 |
|
|---|
| 480 | G4int oldprec; // cout/cerr precision settings
|
|---|
| 481 |
|
|---|
| 482 | if( ((stepNo == 0) && (verboseLevel <3)) || (verboseLevel >= 3) )
|
|---|
| 483 | {
|
|---|
| 484 | oldprec = G4cout.precision(4);
|
|---|
| 485 | G4cout << std::setw( 6) << " "
|
|---|
| 486 | << std::setw( 25) << " Current Position and Direction" << " "
|
|---|
| 487 | << G4endl;
|
|---|
| 488 | G4cout << std::setw( 5) << "Step#"
|
|---|
| 489 | << std::setw(10) << " s " << " "
|
|---|
| 490 | << std::setw(10) << "X(mm)" << " "
|
|---|
| 491 | << std::setw(10) << "Y(mm)" << " "
|
|---|
| 492 | << std::setw(10) << "Z(mm)" << " "
|
|---|
| 493 | << std::setw( 7) << " N_x " << " "
|
|---|
| 494 | << std::setw( 7) << " N_y " << " "
|
|---|
| 495 | << std::setw( 7) << " N_z " << " " ;
|
|---|
| 496 | G4cout << std::setw( 7) << " Delta|N|" << " "
|
|---|
| 497 | << std::setw( 9) << "StepLen" << " "
|
|---|
| 498 | << std::setw(12) << "StartSafety" << " "
|
|---|
| 499 | << std::setw( 9) << "PhsStep" << " ";
|
|---|
| 500 | if( startVolume )
|
|---|
| 501 | { G4cout << std::setw(18) << "NextVolume" << " "; }
|
|---|
| 502 | G4cout.precision(oldprec);
|
|---|
| 503 | G4cout << G4endl;
|
|---|
| 504 | }
|
|---|
| 505 | if((stepNo == 0) && (verboseLevel <=3))
|
|---|
| 506 | {
|
|---|
| 507 | // Recurse to print the start values
|
|---|
| 508 | //
|
|---|
| 509 | printStatus( StartFT, StartFT, -1.0, safety, -1, startVolume);
|
|---|
| 510 | }
|
|---|
| 511 | if( verboseLevel <= 3 )
|
|---|
| 512 | {
|
|---|
| 513 | if( stepNo >= 0)
|
|---|
| 514 | { G4cout << std::setw( 4) << stepNo << " "; }
|
|---|
| 515 | else
|
|---|
| 516 | { G4cout << std::setw( 5) << "Start" ; }
|
|---|
| 517 | oldprec = G4cout.precision(8);
|
|---|
| 518 | G4cout << std::setw(10) << CurrentFT.GetCurveLength() << " ";
|
|---|
| 519 | G4cout.precision(8);
|
|---|
| 520 | G4cout << std::setw(10) << CurrentPosition.x() << " "
|
|---|
| 521 | << std::setw(10) << CurrentPosition.y() << " "
|
|---|
| 522 | << std::setw(10) << CurrentPosition.z() << " ";
|
|---|
| 523 | G4cout.precision(4);
|
|---|
| 524 | G4cout << std::setw( 7) << CurrentUnitVelocity.x() << " "
|
|---|
| 525 | << std::setw( 7) << CurrentUnitVelocity.y() << " "
|
|---|
| 526 | << std::setw( 7) << CurrentUnitVelocity.z() << " ";
|
|---|
| 527 | G4cout.precision(3);
|
|---|
| 528 | G4cout << std::setw( 7)
|
|---|
| 529 | << CurrentFT.GetMomentum().mag()-StartFT.GetMomentum().mag() << " ";
|
|---|
| 530 | G4cout << std::setw( 9) << step_len << " ";
|
|---|
| 531 | G4cout << std::setw(12) << safety << " ";
|
|---|
| 532 | if( requestStep != -1.0 )
|
|---|
| 533 | { G4cout << std::setw( 9) << requestStep << " "; }
|
|---|
| 534 | else
|
|---|
| 535 | { G4cout << std::setw( 9) << "Init/NotKnown" << " "; }
|
|---|
| 536 | if( startVolume != 0)
|
|---|
| 537 | { G4cout << std::setw(12) << startVolume->GetName() << " "; }
|
|---|
| 538 | G4cout.precision(oldprec);
|
|---|
| 539 | G4cout << G4endl;
|
|---|
| 540 | }
|
|---|
| 541 | else // if( verboseLevel > 3 )
|
|---|
| 542 | {
|
|---|
| 543 | // Multi-line output
|
|---|
| 544 |
|
|---|
| 545 | G4cout << "Step taken was " << step_len
|
|---|
| 546 | << " out of PhysicalStep = " << requestStep << G4endl;
|
|---|
| 547 | G4cout << "Final safety is: " << safety << G4endl;
|
|---|
| 548 | G4cout << "Chord length = " << (CurrentPosition-StartPosition).mag()
|
|---|
| 549 | << G4endl;
|
|---|
| 550 | G4cout << G4endl;
|
|---|
| 551 | }
|
|---|
| 552 | }
|
|---|
| 553 |
|
|---|
| 554 | ///////////////////////////////////////////////////////////////////////////
|
|---|
| 555 | //
|
|---|
| 556 | // Prints Step diagnostics
|
|---|
| 557 |
|
|---|
| 558 | void
|
|---|
| 559 | G4PropagatorInField::PrintStepLengthDiagnostic(
|
|---|
| 560 | G4double CurrentProposedStepLength,
|
|---|
| 561 | G4double decreaseFactor,
|
|---|
| 562 | G4double stepTrial,
|
|---|
| 563 | const G4FieldTrack& )
|
|---|
| 564 | {
|
|---|
| 565 | #if 0
|
|---|
| 566 | G4cout << " PiF: NoZeroStep = " << fNoZeroStep
|
|---|
| 567 | << " CurrentProposedStepLength = " << CurrentProposedStepLength
|
|---|
| 568 | << " Full_curvelen_last =" << fFull_CurveLen_of_LastAttempt
|
|---|
| 569 | << " last proposed step-length = " << fLast_ProposedStepLength
|
|---|
| 570 | << " decrease factor = " << decreaseFactor
|
|---|
| 571 | << " step trial = " << stepTrial
|
|---|
| 572 | << G4endl;
|
|---|
| 573 | #endif
|
|---|
| 574 | int iprec= G4cout.precision(8);
|
|---|
| 575 | G4cout << " " << std::setw(12) << " PiF: NoZeroStep "
|
|---|
| 576 | << " " << std::setw(20) << " CurrentProposed len "
|
|---|
| 577 | << " " << std::setw(18) << " Full_curvelen_last"
|
|---|
| 578 | << " " << std::setw(18) << " last proposed len "
|
|---|
| 579 | << " " << std::setw(18) << " decrease factor "
|
|---|
| 580 | << " " << std::setw(15) << " step trial "
|
|---|
| 581 | << G4endl;
|
|---|
| 582 |
|
|---|
| 583 | G4cout << " " << std::setw(10) << fNoZeroStep << " "
|
|---|
| 584 | << " " << std::setw(20) << CurrentProposedStepLength
|
|---|
| 585 | << " " << std::setw(18) << fFull_CurveLen_of_LastAttempt
|
|---|
| 586 | << " " << std::setw(18) << fLast_ProposedStepLength
|
|---|
| 587 | << " " << std::setw(18) << decreaseFactor
|
|---|
| 588 | << " " << std::setw(15) << stepTrial
|
|---|
| 589 | << G4endl;
|
|---|
| 590 | G4cout.precision( iprec );
|
|---|
| 591 |
|
|---|
| 592 | }
|
|---|
| 593 |
|
|---|
| 594 | // Access the points which have passed through the filter. The
|
|---|
| 595 | // points are stored as ThreeVectors for the initial impelmentation
|
|---|
| 596 | // only (jacek 30/10/2002)
|
|---|
| 597 | // Responsibility for deleting the points lies with
|
|---|
| 598 | // SmoothTrajectoryPoint, which is the points' final
|
|---|
| 599 | // destination. The points pointer is set to NULL, to ensure that
|
|---|
| 600 | // the points are not re-used in subsequent steps, therefore THIS
|
|---|
| 601 | // METHOD MUST BE CALLED EXACTLY ONCE PER STEP. (jacek 08/11/2002)
|
|---|
| 602 |
|
|---|
| 603 | std::vector<G4ThreeVector>*
|
|---|
| 604 | G4PropagatorInField::GimmeTrajectoryVectorAndForgetIt() const
|
|---|
| 605 | {
|
|---|
| 606 | // NB, GimmeThePointsAndForgetThem really forgets them, so it can
|
|---|
| 607 | // only be called (exactly) once for each step.
|
|---|
| 608 |
|
|---|
| 609 | if (fpTrajectoryFilter)
|
|---|
| 610 | {
|
|---|
| 611 | return fpTrajectoryFilter->GimmeThePointsAndForgetThem();
|
|---|
| 612 | }
|
|---|
| 613 | else
|
|---|
| 614 | {
|
|---|
| 615 | return 0;
|
|---|
| 616 | }
|
|---|
| 617 | }
|
|---|
| 618 |
|
|---|
| 619 | void
|
|---|
| 620 | G4PropagatorInField::SetTrajectoryFilter(G4VCurvedTrajectoryFilter* filter)
|
|---|
| 621 | {
|
|---|
| 622 | fpTrajectoryFilter = filter;
|
|---|
| 623 | }
|
|---|
| 624 |
|
|---|
| 625 | void G4PropagatorInField::ClearPropagatorState()
|
|---|
| 626 | {
|
|---|
| 627 | // Goal: Clear all memory of previous steps, cached information
|
|---|
| 628 |
|
|---|
| 629 | fParticleIsLooping= false;
|
|---|
| 630 | fNoZeroStep= 0;
|
|---|
| 631 |
|
|---|
| 632 | End_PointAndTangent= G4FieldTrack( G4ThreeVector(0.,0.,0.),
|
|---|
| 633 | G4ThreeVector(0.,0.,0.),
|
|---|
| 634 | 0.0,0.0,0.0,0.0,0.0);
|
|---|
| 635 | fFull_CurveLen_of_LastAttempt = -1;
|
|---|
| 636 | fLast_ProposedStepLength = -1;
|
|---|
| 637 |
|
|---|
| 638 | fPreviousSftOrigin= G4ThreeVector(0.,0.,0.);
|
|---|
| 639 | fPreviousSafety= 0.0;
|
|---|
| 640 | }
|
|---|
| 641 |
|
|---|
| 642 | G4FieldManager* G4PropagatorInField::
|
|---|
| 643 | FindAndSetFieldManager( G4VPhysicalVolume* pCurrentPhysicalVolume)
|
|---|
| 644 | {
|
|---|
| 645 | G4FieldManager* currentFieldMgr;
|
|---|
| 646 |
|
|---|
| 647 | currentFieldMgr = fDetectorFieldMgr;
|
|---|
| 648 | if( pCurrentPhysicalVolume)
|
|---|
| 649 | {
|
|---|
| 650 | G4FieldManager *pRegionFieldMgr= 0, *localFieldMgr = 0;
|
|---|
| 651 | G4LogicalVolume* pLogicalVol= pCurrentPhysicalVolume->GetLogicalVolume();
|
|---|
| 652 |
|
|---|
| 653 | if( pLogicalVol ) {
|
|---|
| 654 | // Value for Region, if any, Overrides
|
|---|
| 655 | G4Region* pRegion= pLogicalVol->GetRegion();
|
|---|
| 656 | if( pRegion ) {
|
|---|
| 657 | pRegionFieldMgr= pRegion->GetFieldManager();
|
|---|
| 658 | if( pRegionFieldMgr )
|
|---|
| 659 | currentFieldMgr= pRegionFieldMgr;
|
|---|
| 660 | }
|
|---|
| 661 |
|
|---|
| 662 | // 'Local' Value from logical volume, if any, Overrides
|
|---|
| 663 | localFieldMgr= pLogicalVol->GetFieldManager();
|
|---|
| 664 | if ( localFieldMgr )
|
|---|
| 665 | currentFieldMgr = localFieldMgr;
|
|---|
| 666 | }
|
|---|
| 667 | }
|
|---|
| 668 | fCurrentFieldMgr= currentFieldMgr;
|
|---|
| 669 |
|
|---|
| 670 | // Flag that field manager has been set.
|
|---|
| 671 | fSetFieldMgr= true;
|
|---|
| 672 |
|
|---|
| 673 | return currentFieldMgr;
|
|---|
| 674 | }
|
|---|
| 675 |
|
|---|
| 676 | G4int G4PropagatorInField::SetVerboseLevel( G4int level )
|
|---|
| 677 | {
|
|---|
| 678 | G4int oldval= fVerboseLevel;
|
|---|
| 679 | fVerboseLevel= level;
|
|---|
| 680 |
|
|---|
| 681 | // Forward the verbose level 'reduced' to ChordFinder,
|
|---|
| 682 | // MagIntegratorDriver ... ?
|
|---|
| 683 | //
|
|---|
| 684 | G4MagInt_Driver* integrDriver= GetChordFinder()->GetIntegrationDriver();
|
|---|
| 685 | integrDriver->SetVerboseLevel( fVerboseLevel - 2 );
|
|---|
| 686 | G4cout << "Set Driver verbosity to " << fVerboseLevel - 2 << G4endl;
|
|---|
| 687 |
|
|---|
| 688 | return oldval;
|
|---|
| 689 | }
|
|---|
