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 1.50 2009/12/10 08:41:54 japost 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 | const G4String MethodName("G4PropagatorInField::ComputeStep"); |
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133 | |
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134 | // If CurrentProposedStepLength is too small for finding Chords |
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135 | // then return with no action (for now - TODO: some action) |
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136 | // |
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137 | if(CurrentProposedStepLength<kCarTolerance) |
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138 | { |
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139 | return kInfinity; |
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140 | } |
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141 | |
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142 | // Introducing smooth trajectory display (jacek 01/11/2002) |
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143 | // |
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144 | if (fpTrajectoryFilter) |
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145 | { |
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146 | fpTrajectoryFilter->CreateNewTrajectorySegment(); |
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147 | } |
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148 | |
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149 | // Parameters for adaptive Runge-Kutta integration |
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150 | |
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151 | G4double h_TrialStepSize; // 1st Step Size |
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152 | G4double TruePathLength = CurrentProposedStepLength; |
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153 | G4double StepTaken = 0.0; |
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154 | G4double s_length_taken, epsilon ; |
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155 | G4bool intersects; |
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156 | G4bool first_substep = true; |
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157 | |
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158 | G4double NewSafety; |
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159 | fParticleIsLooping = false; |
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160 | |
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161 | // If not yet done, |
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162 | // Set the field manager to the local one if the volume has one, |
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163 | // or to the global one if not |
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164 | // |
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165 | if( !fSetFieldMgr ) fCurrentFieldMgr= FindAndSetFieldManager( pPhysVol ); |
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166 | // For the next call, the field manager must again be set |
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167 | fSetFieldMgr= false; |
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168 | |
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169 | GetChordFinder()->SetChargeMomentumMass(fCharge, fInitialMomentumModulus, fMass); |
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170 | |
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171 | // Values for Intersection Locator has to be updated on each call for the |
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172 | // case that CurrentFieldManager has changed from the one of previous step |
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173 | RefreshIntersectionLocator(); |
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174 | |
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175 | G4FieldTrack CurrentState(pFieldTrack); |
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176 | G4FieldTrack OriginalState = CurrentState; |
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177 | |
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178 | // If the Step length is "infinite", then an approximate-maximum Step |
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179 | // length (used to calculate the relative accuracy) must be guessed. |
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180 | // |
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181 | if( CurrentProposedStepLength >= fLargestAcceptableStep ) |
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182 | { |
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183 | G4ThreeVector StartPointA, VelocityUnit; |
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184 | StartPointA = pFieldTrack.GetPosition(); |
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185 | VelocityUnit = pFieldTrack.GetMomentumDir(); |
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186 | |
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187 | G4double trialProposedStep = 1.e2 * ( 10.0 * cm + |
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188 | fNavigator->GetWorldVolume()->GetLogicalVolume()-> |
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189 | GetSolid()->DistanceToOut(StartPointA, VelocityUnit) ); |
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190 | CurrentProposedStepLength= std::min( trialProposedStep, |
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191 | fLargestAcceptableStep ); |
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192 | } |
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193 | epsilon = fCurrentFieldMgr->GetDeltaOneStep() / CurrentProposedStepLength; |
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194 | // G4double raw_epsilon= epsilon; |
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195 | G4double epsilonMin= fCurrentFieldMgr->GetMinimumEpsilonStep(); |
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196 | G4double epsilonMax= fCurrentFieldMgr->GetMaximumEpsilonStep();; |
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197 | if( epsilon < epsilonMin ) epsilon = epsilonMin; |
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198 | if( epsilon > epsilonMax ) epsilon = epsilonMax; |
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199 | SetEpsilonStep( epsilon ); |
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200 | |
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201 | // G4cout << "G4PiF: Epsilon of current step - raw= " << raw_epsilon |
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202 | // << " final= " << epsilon << G4endl; |
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203 | |
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204 | // Shorten the proposed step in case of earlier problems (zero steps) |
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205 | // |
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206 | if( fNoZeroStep > fActionThreshold_NoZeroSteps ) |
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207 | { |
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208 | G4double stepTrial; |
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209 | |
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210 | stepTrial= fFull_CurveLen_of_LastAttempt; |
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211 | if( (stepTrial <= 0.0) && (fLast_ProposedStepLength > 0.0) ) |
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212 | stepTrial= fLast_ProposedStepLength; |
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213 | |
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214 | G4double decreaseFactor = 0.9; // Unused default |
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215 | if( (fNoZeroStep < fSevereActionThreshold_NoZeroSteps) |
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216 | && (stepTrial > 100.0*fZeroStepThreshold) ) |
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217 | { |
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218 | // Attempt quick convergence |
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219 | // |
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220 | decreaseFactor= 0.25; |
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221 | } |
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222 | else |
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223 | { |
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224 | // We are in significant difficulties, probably at a boundary that |
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225 | // is either geometrically sharp or between very different materials. |
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226 | // Careful decreases to cope with tolerance are required. |
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227 | // |
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228 | if( stepTrial > 100.0*fZeroStepThreshold ) |
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229 | decreaseFactor = 0.35; // Try decreasing slower |
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230 | else if( stepTrial > 100.0*fZeroStepThreshold ) |
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231 | decreaseFactor= 0.5; // Try yet slower decreases |
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232 | else if( stepTrial > 10.0*fZeroStepThreshold ) |
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233 | decreaseFactor= 0.75; // Try even slower decreases |
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234 | else |
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235 | decreaseFactor= 0.9; // Try very slow decreases |
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236 | } |
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237 | stepTrial *= decreaseFactor; |
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238 | |
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239 | #ifdef G4DEBUG_FIELD |
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240 | G4cout << MethodName << ": " |
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241 | << " Decreasing step - " |
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242 | << " decreaseFactor= " << std::setw(8) << decreaseFactor |
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243 | << " stepTrial = " << std::setw(18) << stepTrial << " " |
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244 | << " fZeroStepThreshold = " << fZeroStepThreshold << G4endl; |
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245 | PrintStepLengthDiagnostic(CurrentProposedStepLength, decreaseFactor, |
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246 | stepTrial, pFieldTrack); |
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247 | #endif |
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248 | if( stepTrial == 0.0 ) // Change to make it < 0.1 * kCarTolerance ?? |
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249 | { |
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250 | G4cout << " G4PropagatorInField::ComputeStep " |
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251 | << " Particle abandoned due to lack of progress in field." |
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252 | << G4endl |
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253 | << " Properties : " << pFieldTrack << " " |
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254 | << G4endl; |
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255 | G4cerr << " G4PropagatorInField::ComputeStep " |
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256 | << " ERROR : attempting a zero step= " << stepTrial << G4endl |
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257 | << " while attempting to progress after " << fNoZeroStep |
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258 | << " trial steps. Will abandon step." << G4endl; |
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259 | fParticleIsLooping= true; |
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260 | return 0; // = stepTrial; |
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261 | } |
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262 | if( stepTrial < CurrentProposedStepLength ) |
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263 | CurrentProposedStepLength = stepTrial; |
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264 | } |
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265 | fLast_ProposedStepLength = CurrentProposedStepLength; |
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266 | |
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267 | G4int do_loop_count = 0; |
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268 | do |
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269 | { |
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270 | G4FieldTrack SubStepStartState = CurrentState; |
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271 | G4ThreeVector SubStartPoint = CurrentState.GetPosition(); |
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272 | |
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273 | if( !first_substep) { |
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274 | fNavigator->LocateGlobalPointWithinVolume( SubStartPoint ); |
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275 | } |
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276 | |
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277 | // How far to attempt to move the particle ! |
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278 | // |
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279 | h_TrialStepSize = CurrentProposedStepLength - StepTaken; |
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280 | |
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281 | // Integrate as far as "chord miss" rule allows. |
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282 | // |
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283 | s_length_taken = GetChordFinder()->AdvanceChordLimited( |
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284 | CurrentState, // Position & velocity |
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285 | h_TrialStepSize, |
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286 | fEpsilonStep, |
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287 | fPreviousSftOrigin, |
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288 | fPreviousSafety |
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289 | ); |
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290 | // CurrentState is now updated with the final position and velocity. |
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291 | |
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292 | fFull_CurveLen_of_LastAttempt = s_length_taken; |
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293 | |
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294 | G4ThreeVector EndPointB = CurrentState.GetPosition(); |
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295 | G4ThreeVector InterSectionPointE; |
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296 | G4double LinearStepLength; |
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297 | |
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298 | // Intersect chord AB with geometry |
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299 | intersects= IntersectChord( SubStartPoint, EndPointB, |
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300 | NewSafety, LinearStepLength, |
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301 | InterSectionPointE ); |
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302 | // E <- Intersection Point of chord AB and either volume A's surface |
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303 | // or a daughter volume's surface .. |
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304 | |
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305 | if( first_substep ) { |
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306 | currentSafety = NewSafety; |
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307 | } // Updating safety in other steps is potential future extention |
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308 | |
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309 | if( intersects ) |
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310 | { |
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311 | G4FieldTrack IntersectPointVelct_G(CurrentState); // FT-Def-Construct |
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312 | |
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313 | // Find the intersection point of AB true path with the surface |
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314 | // of vol(A), if it exists. Start with point E as first "estimate". |
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315 | G4bool recalculatedEndPt= false; |
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316 | |
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317 | G4bool found_intersection = fIntersectionLocator-> |
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318 | EstimateIntersectionPoint( SubStepStartState, CurrentState, |
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319 | InterSectionPointE, IntersectPointVelct_G, |
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320 | recalculatedEndPt,fPreviousSafety,fPreviousSftOrigin); |
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321 | intersects = intersects && found_intersection; |
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322 | if( found_intersection ) { |
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323 | End_PointAndTangent= IntersectPointVelct_G; // G is our EndPoint ... |
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324 | StepTaken = TruePathLength = IntersectPointVelct_G.GetCurveLength() |
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325 | - OriginalState.GetCurveLength(); |
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326 | } else { |
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327 | // intersects= false; // "Minor" chords do not intersect |
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328 | if( recalculatedEndPt ){ |
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329 | CurrentState= IntersectPointVelct_G; |
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330 | } |
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331 | } |
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332 | } |
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333 | if( !intersects ) |
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334 | { |
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335 | StepTaken += s_length_taken; |
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336 | // For smooth trajectory display (jacek 01/11/2002) |
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337 | if (fpTrajectoryFilter) { |
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338 | fpTrajectoryFilter->TakeIntermediatePoint(CurrentState.GetPosition()); |
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339 | } |
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340 | } |
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341 | first_substep = false; |
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342 | |
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343 | #ifdef G4DEBUG_FIELD |
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344 | if( fNoZeroStep > fActionThreshold_NoZeroSteps ) { |
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345 | printStatus( SubStepStartState, // or OriginalState, |
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346 | CurrentState, CurrentProposedStepLength, |
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347 | NewSafety, do_loop_count, pPhysVol ); |
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348 | } |
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349 | #endif |
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350 | #ifdef G4VERBOSE |
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351 | if( (fVerboseLevel > 1) && (do_loop_count > fMax_loop_count-10 )) { |
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352 | if( do_loop_count == fMax_loop_count-9 ){ |
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353 | G4cout << "G4PropagatorInField::ComputeStep " |
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354 | << " Difficult track - taking many sub steps." << G4endl; |
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355 | } |
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356 | printStatus( SubStepStartState, CurrentState, CurrentProposedStepLength, |
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357 | NewSafety, do_loop_count, pPhysVol ); |
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358 | } |
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359 | #endif |
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360 | |
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361 | do_loop_count++; |
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362 | |
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363 | } while( (!intersects ) |
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364 | && (StepTaken + kCarTolerance < CurrentProposedStepLength) |
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365 | && ( do_loop_count < fMax_loop_count ) ); |
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366 | |
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367 | if( do_loop_count >= fMax_loop_count ) |
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368 | { |
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369 | fParticleIsLooping = true; |
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370 | |
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371 | if ( fVerboseLevel > 0 ){ |
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372 | G4cout << "G4PropagateInField: 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 the 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 ) |
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385 | { |
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386 | // Chord AB or "minor chords" do not intersect |
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387 | // B is the endpoint Step of the current Step. |
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388 | // |
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389 | End_PointAndTangent = CurrentState; |
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390 | TruePathLength = StepTaken; |
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391 | } |
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392 | |
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393 | // Set pFieldTrack to the return value |
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394 | // |
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395 | pFieldTrack = End_PointAndTangent; |
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396 | |
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397 | #ifdef G4VERBOSE |
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398 | // Check that "s" is correct |
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399 | // |
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400 | if( std::fabs(OriginalState.GetCurveLength() + TruePathLength |
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401 | - End_PointAndTangent.GetCurveLength()) > 3.e-4 * TruePathLength ) |
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402 | { |
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403 | G4cerr << " ERROR - G4PropagatorInField::ComputeStep():" << G4endl |
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404 | << " Curve length mis-match, is advancement wrong ? " << G4endl; |
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405 | G4cerr << " The curve length of the endpoint should be: " |
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406 | << OriginalState.GetCurveLength() + TruePathLength << G4endl |
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407 | << " and it is instead: " |
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408 | << End_PointAndTangent.GetCurveLength() << "." << G4endl |
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409 | << " A difference of: " |
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410 | << OriginalState.GetCurveLength() + TruePathLength |
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411 | - End_PointAndTangent.GetCurveLength() << G4endl; |
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412 | G4cerr << " Original state= " << OriginalState << G4endl |
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413 | << " Proposed state= " << End_PointAndTangent << G4endl; |
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414 | G4Exception("G4PropagatorInField::ComputeStep()", "IncorrectProposedEndPoint", |
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415 | FatalException, |
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416 | "Curve length mis-match between original state and proposed endpoint of propagation."); |
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417 | } |
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418 | #endif |
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419 | |
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420 | // In particular anomalous cases, we can get repeated zero steps |
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421 | // In order to correct this efficiently, we identify these cases |
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422 | // and only take corrective action when they occur. |
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423 | // |
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424 | if( ( (TruePathLength < fZeroStepThreshold) |
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425 | && ( TruePathLength+kCarTolerance < CurrentProposedStepLength ) |
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426 | ) |
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427 | || ( TruePathLength < 0.5*kCarTolerance ) |
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428 | ) |
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429 | { |
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430 | fNoZeroStep++; |
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431 | } |
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432 | else{ |
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433 | fNoZeroStep = 0; |
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434 | } |
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435 | |
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436 | if( fNoZeroStep > fAbandonThreshold_NoZeroSteps ) { |
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437 | fParticleIsLooping = true; |
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438 | G4cout << " WARNING - G4PropagatorInField::ComputeStep():" << G4endl |
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439 | << " Zero progress for " << fNoZeroStep << " attempted steps." |
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440 | << G4endl; |
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441 | G4cout << "Proposed Step is "<<CurrentProposedStepLength <<" but Step Taken is "<< fFull_CurveLen_of_LastAttempt <<G4endl; |
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442 | G4cout << "For Particle with Charge ="<<fCharge |
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443 | << " Momentum="<< fInitialMomentumModulus<<" Mass="<< fMass<<G4endl; |
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444 | if( pPhysVol ) |
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445 | G4cout << " in the volume " << pPhysVol->GetName() ; |
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446 | else |
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447 | G4cout << " in unknown or null volume. " ; |
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448 | G4cout << G4endl; |
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449 | if ( fVerboseLevel > 2 ) |
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450 | G4cout << " Particle that is stuck will be killed." << G4endl; |
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451 | fNoZeroStep = 0; |
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452 | } |
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453 | |
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454 | return TruePathLength; |
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455 | } |
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456 | |
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457 | /////////////////////////////////////////////////////////////////////////// |
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458 | // |
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459 | // Dumps status of propagator. |
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460 | |
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461 | void |
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462 | G4PropagatorInField::printStatus( const G4FieldTrack& StartFT, |
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463 | const G4FieldTrack& CurrentFT, |
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464 | G4double requestStep, |
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465 | G4double safety, |
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466 | G4int stepNo, |
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467 | G4VPhysicalVolume* startVolume) |
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468 | { |
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469 | const G4int verboseLevel= fVerboseLevel; |
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470 | const G4ThreeVector StartPosition = StartFT.GetPosition(); |
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471 | const G4ThreeVector StartUnitVelocity = StartFT.GetMomentumDir(); |
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472 | const G4ThreeVector CurrentPosition = CurrentFT.GetPosition(); |
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473 | const G4ThreeVector CurrentUnitVelocity = CurrentFT.GetMomentumDir(); |
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474 | |
---|
475 | G4double step_len = CurrentFT.GetCurveLength() - StartFT.GetCurveLength(); |
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476 | |
---|
477 | if( ((stepNo == 0) && (verboseLevel <3)) |
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478 | || (verboseLevel >= 3) ) |
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479 | { |
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480 | static G4int noPrecision= 4; |
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481 | G4cout.precision(noPrecision); |
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482 | // G4cout.setf(ios_base::fixed,ios_base::floatfield); |
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483 | G4cout << std::setw( 6) << " " |
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484 | << std::setw( 25) << " Current Position and Direction" << " " |
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485 | << G4endl; |
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486 | G4cout << std::setw( 5) << "Step#" |
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487 | << std::setw(10) << " s " << " " |
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488 | << std::setw(10) << "X(mm)" << " " |
---|
489 | << std::setw(10) << "Y(mm)" << " " |
---|
490 | << std::setw(10) << "Z(mm)" << " " |
---|
491 | << std::setw( 7) << " N_x " << " " |
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492 | << std::setw( 7) << " N_y " << " " |
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493 | << std::setw( 7) << " N_z " << " " ; |
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494 | // << G4endl; |
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495 | G4cout // << " >>> " |
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496 | << std::setw( 7) << " Delta|N|" << " " |
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497 | // << std::setw( 7) << " Delta(N_z) " << " " |
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498 | << std::setw( 9) << "StepLen" << " " |
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499 | << std::setw(12) << "StartSafety" << " " |
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500 | << std::setw( 9) << "PhsStep" << " "; |
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501 | if( startVolume ) { |
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502 | G4cout << std::setw(18) << "NextVolume" << " "; |
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503 | } |
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504 | G4cout << G4endl; |
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505 | } |
---|
506 | if((stepNo == 0) && (verboseLevel <=3)){ |
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507 | // Recurse to print the start values |
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508 | // |
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509 | printStatus( StartFT, StartFT, -1.0, safety, -1, startVolume); |
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510 | } |
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511 | if( verboseLevel <= 3 ) |
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512 | { |
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513 | if( stepNo >= 0) |
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514 | G4cout << std::setw( 4) << stepNo << " "; |
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515 | else |
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516 | G4cout << std::setw( 5) << "Start" ; |
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517 | G4cout.precision(8); |
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518 | G4cout << std::setw(10) << CurrentFT.GetCurveLength() << " "; |
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519 | G4cout.precision(8); |
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520 | G4cout << std::setw(10) << CurrentPosition.x() << " " |
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521 | << std::setw(10) << CurrentPosition.y() << " " |
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522 | << std::setw(10) << CurrentPosition.z() << " "; |
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523 | G4cout.precision(4); |
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524 | G4cout << std::setw( 7) << CurrentUnitVelocity.x() << " " |
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525 | << std::setw( 7) << CurrentUnitVelocity.y() << " " |
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526 | << std::setw( 7) << CurrentUnitVelocity.z() << " "; |
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527 | // G4cout << G4endl; |
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528 | // G4cout << " >>> " ; |
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529 | G4cout.precision(3); |
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530 | G4cout << std::setw( 7) << CurrentFT.GetMomentum().mag()- StartFT.GetMomentum().mag() << " "; |
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531 | // << std::setw( 7) << CurrentUnitVelocity.z() - InitialUnitVelocity.z() << " "; |
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532 | G4cout << std::setw( 9) << step_len << " "; |
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533 | G4cout << std::setw(12) << safety << " "; |
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534 | if( requestStep != -1.0 ) |
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535 | G4cout << std::setw( 9) << requestStep << " "; |
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536 | else |
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537 | G4cout << std::setw( 9) << "Init/NotKnown" << " "; |
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538 | |
---|
539 | if( startVolume != 0) |
---|
540 | { |
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541 | G4cout << std::setw(12) << startVolume->GetName() << " "; |
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542 | } |
---|
543 | #if 0 |
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544 | else |
---|
545 | { |
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546 | if( step_len != -1 ) |
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547 | G4cout << std::setw(12) << "OutOfWorld" << " "; |
---|
548 | else |
---|
549 | G4cout << std::setw(12) << "NotGiven" << " "; |
---|
550 | } |
---|
551 | #endif |
---|
552 | |
---|
553 | G4cout << G4endl; |
---|
554 | } |
---|
555 | else // if( verboseLevel > 3 ) |
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556 | { |
---|
557 | // Multi-line output |
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558 | |
---|
559 | G4cout << "Step taken was " << step_len |
---|
560 | << " out of PhysicalStep= " << requestStep << G4endl; |
---|
561 | G4cout << "Final safety is: " << safety << G4endl; |
---|
562 | |
---|
563 | G4cout << "Chord length = " << (CurrentPosition-StartPosition).mag() |
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564 | << G4endl; |
---|
565 | G4cout << G4endl; |
---|
566 | } |
---|
567 | } |
---|
568 | |
---|
569 | /////////////////////////////////////////////////////////////////////////// |
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570 | // |
---|
571 | // Prints Step diagnostics |
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572 | |
---|
573 | void |
---|
574 | G4PropagatorInField::PrintStepLengthDiagnostic( |
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575 | G4double CurrentProposedStepLength, |
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576 | G4double decreaseFactor, |
---|
577 | G4double stepTrial, |
---|
578 | const G4FieldTrack& ) |
---|
579 | { |
---|
580 | #if 0 |
---|
581 | G4cout << " PiF: NoZeroStep= " << fNoZeroStep |
---|
582 | << " CurrentProposedStepLength= " << CurrentProposedStepLength |
---|
583 | << " Full_curvelen_last=" << fFull_CurveLen_of_LastAttempt |
---|
584 | << " last proposed step-length= " << fLast_ProposedStepLength |
---|
585 | << " decrease factor = " << decreaseFactor |
---|
586 | << " step trial = " << stepTrial |
---|
587 | << G4endl; |
---|
588 | #endif |
---|
589 | int iprec= G4cout.precision(8); |
---|
590 | G4cout << " " << std::setw(12) << " PiF: NoZeroStep " |
---|
591 | << " " << std::setw(20) << " CurrentProposed len " |
---|
592 | << " " << std::setw(18) << " Full_curvelen_last" |
---|
593 | << " " << std::setw(18) << " last proposed len " |
---|
594 | << " " << std::setw(18) << " decrease factor " |
---|
595 | << " " << std::setw(15) << " step trial " |
---|
596 | << G4endl; |
---|
597 | |
---|
598 | G4cout << " " << std::setw(10) << fNoZeroStep << " " |
---|
599 | << " " << std::setw(20) << CurrentProposedStepLength |
---|
600 | << " " << std::setw(18) << fFull_CurveLen_of_LastAttempt |
---|
601 | << " " << std::setw(18) << fLast_ProposedStepLength |
---|
602 | << " " << std::setw(18) << decreaseFactor |
---|
603 | << " " << std::setw(15) << stepTrial |
---|
604 | << G4endl; |
---|
605 | G4cout.precision( iprec ); |
---|
606 | |
---|
607 | } |
---|
608 | |
---|
609 | // Access the points which have passed through the filter. The |
---|
610 | // points are stored as ThreeVectors for the initial impelmentation |
---|
611 | // only (jacek 30/10/2002) |
---|
612 | // Responsibility for deleting the points lies with |
---|
613 | // SmoothTrajectoryPoint, which is the points' final |
---|
614 | // destination. The points pointer is set to NULL, to ensure that |
---|
615 | // the points are not re-used in subsequent steps, therefore THIS |
---|
616 | // METHOD MUST BE CALLED EXACTLY ONCE PER STEP. (jacek 08/11/2002) |
---|
617 | |
---|
618 | std::vector<G4ThreeVector>* |
---|
619 | G4PropagatorInField::GimmeTrajectoryVectorAndForgetIt() const |
---|
620 | { |
---|
621 | // NB, GimmeThePointsAndForgetThem really forgets them, so it can |
---|
622 | // only be called (exactly) once for each step. |
---|
623 | |
---|
624 | if (fpTrajectoryFilter) |
---|
625 | { |
---|
626 | return fpTrajectoryFilter->GimmeThePointsAndForgetThem(); |
---|
627 | } |
---|
628 | else |
---|
629 | { |
---|
630 | return 0; |
---|
631 | } |
---|
632 | } |
---|
633 | |
---|
634 | void |
---|
635 | G4PropagatorInField::SetTrajectoryFilter(G4VCurvedTrajectoryFilter* filter) |
---|
636 | { |
---|
637 | fpTrajectoryFilter = filter; |
---|
638 | } |
---|
639 | |
---|
640 | void G4PropagatorInField::ClearPropagatorState() |
---|
641 | { |
---|
642 | // Goal: Clear all memory of previous steps, cached information |
---|
643 | |
---|
644 | fParticleIsLooping= false; |
---|
645 | fNoZeroStep= 0; |
---|
646 | |
---|
647 | End_PointAndTangent= G4FieldTrack( G4ThreeVector(0.,0.,0.), |
---|
648 | G4ThreeVector(0.,0.,0.), |
---|
649 | 0.0,0.0,0.0,0.0,0.0); |
---|
650 | fFull_CurveLen_of_LastAttempt = -1; |
---|
651 | fLast_ProposedStepLength = -1; |
---|
652 | |
---|
653 | fPreviousSftOrigin= G4ThreeVector(0.,0.,0.); |
---|
654 | fPreviousSafety= 0.0; |
---|
655 | } |
---|
656 | |
---|
657 | G4FieldManager* G4PropagatorInField:: |
---|
658 | FindAndSetFieldManager( G4VPhysicalVolume* pCurrentPhysicalVolume) |
---|
659 | { |
---|
660 | G4FieldManager* currentFieldMgr; |
---|
661 | |
---|
662 | currentFieldMgr = fDetectorFieldMgr; |
---|
663 | if( pCurrentPhysicalVolume) |
---|
664 | { |
---|
665 | G4FieldManager *pRegionFieldMgr= 0, *localFieldMgr = 0; |
---|
666 | G4LogicalVolume* pLogicalVol= pCurrentPhysicalVolume->GetLogicalVolume(); |
---|
667 | |
---|
668 | if( pLogicalVol ) { |
---|
669 | // Value for Region, if any, Overrides |
---|
670 | G4Region* pRegion= pLogicalVol->GetRegion(); |
---|
671 | if( pRegion ) { |
---|
672 | pRegionFieldMgr= pRegion->GetFieldManager(); |
---|
673 | if( pRegionFieldMgr ) |
---|
674 | currentFieldMgr= pRegionFieldMgr; |
---|
675 | } |
---|
676 | |
---|
677 | // 'Local' Value from logical volume, if any, Overrides |
---|
678 | localFieldMgr= pLogicalVol->GetFieldManager(); |
---|
679 | if ( localFieldMgr ) |
---|
680 | currentFieldMgr = localFieldMgr; |
---|
681 | } |
---|
682 | } |
---|
683 | fCurrentFieldMgr= currentFieldMgr; |
---|
684 | |
---|
685 | // Flag that field manager has been set. |
---|
686 | fSetFieldMgr= true; |
---|
687 | |
---|
688 | return currentFieldMgr; |
---|
689 | } |
---|
690 | |
---|
691 | G4int G4PropagatorInField::SetVerboseLevel( G4int level ) |
---|
692 | { |
---|
693 | G4int oldval= fVerboseLevel; |
---|
694 | fVerboseLevel= level; |
---|
695 | |
---|
696 | // Forward the verbose level 'reduced' to ChordFinder, |
---|
697 | // MagIntegratorDriver ... ? |
---|
698 | // |
---|
699 | G4MagInt_Driver* integrDriver= GetChordFinder()->GetIntegrationDriver(); |
---|
700 | integrDriver->SetVerboseLevel( fVerboseLevel - 2 ); |
---|
701 | G4cout << "Set Driver verbosity to " << fVerboseLevel - 2 << G4endl; |
---|
702 | |
---|
703 | return oldval; |
---|
704 | } |
---|