Geant4 Cross Reference

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Geant4/examples/extended/errorpropagation/errProp/src/ExErrorMagneticField.cc

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 26 //
 27 /// \file errProp/src/ExErrorMagneticField.cc
 28 /// \brief Implementation of the ExErrorMagneticField class
 29 //
 30 
 31 #include "ExErrorMagneticField.hh"
 32 
 33 #include "G4FieldManager.hh"
 34 #include "G4TransportationManager.hh"
 35 
 36 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
 37 ExErrorMagneticField::ExErrorMagneticField() : G4UniformMagField(G4ThreeVector())
 38 {
 39   GetGlobalFieldManager()->SetDetectorField(this);
 40   GetGlobalFieldManager()->CreateChordFinder(this);
 41 }
 42 
 43 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
 44 ExErrorMagneticField::ExErrorMagneticField(G4ThreeVector fieldVector)
 45   : G4UniformMagField(fieldVector)
 46 {
 47   GetGlobalFieldManager()->SetDetectorField(this);
 48   GetGlobalFieldManager()->CreateChordFinder(this);
 49 }
 50 
 51 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
 52 void ExErrorMagneticField::SetFieldValue(G4double fieldValue)
 53 {
 54   G4UniformMagField::SetFieldValue(G4ThreeVector(0, 0, fieldValue));
 55 }
 56 
 57 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
 58 void ExErrorMagneticField::SetFieldValue(G4ThreeVector fieldVector)
 59 {
 60   // Find the Field Manager for the global field
 61   G4FieldManager* fieldMgr = GetGlobalFieldManager();
 62 
 63   if (fieldVector != G4ThreeVector(0., 0., 0.)) {
 64     G4UniformMagField::SetFieldValue(fieldVector);
 65     fieldMgr->SetDetectorField(this);
 66   }
 67   else {
 68     // If the new field's value is Zero, then it is best to
 69     //  insure that it is not used for propagation.
 70     G4MagneticField* magField = NULL;
 71     fieldMgr->SetDetectorField(magField);
 72   }
 73 }
 74 
 75 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
 76 G4FieldManager* ExErrorMagneticField::GetGlobalFieldManager()
 77 {
 78   return G4TransportationManager::GetTransportationManager()->GetFieldManager();
 79 }
 80