errProp/src/ExErrorMagneticField.cc

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0026 //
0027 /// \file errProp/src/ExErrorMagneticField.cc
0028 /// \brief Implementation of the ExErrorMagneticField class
0029 //
0030
0031 #include "ExErrorMagneticField.hh"
0032
0033 #include "G4FieldManager.hh"
0034 #include "G4TransportationManager.hh"
0035
0036 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
0037 ExErrorMagneticField::ExErrorMagneticField() : G4UniformMagField(G4ThreeVector())
0038 {
0039   GetGlobalFieldManager()->SetDetectorField(this);
0040   GetGlobalFieldManager()->CreateChordFinder(this);
0041 }
0042
0043 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
0044 ExErrorMagneticField::ExErrorMagneticField(G4ThreeVector fieldVector)
0045   : G4UniformMagField(fieldVector)
0046 {
0047   GetGlobalFieldManager()->SetDetectorField(this);
0048   GetGlobalFieldManager()->CreateChordFinder(this);
0049 }
0050
0051 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
0052 void ExErrorMagneticField::SetFieldValue(G4double fieldValue)
0053 {
0054   G4UniformMagField::SetFieldValue(G4ThreeVector(0, 0, fieldValue));
0055 }
0056
0057 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
0058 void ExErrorMagneticField::SetFieldValue(G4ThreeVector fieldVector)
0059 {
0060   // Find the Field Manager for the global field
0061   G4FieldManager* fieldMgr = GetGlobalFieldManager();
0062
0063   if (fieldVector != G4ThreeVector(0., 0., 0.)) {
0064     G4UniformMagField::SetFieldValue(fieldVector);
0065     fieldMgr->SetDetectorField(this);
0066   }
0067   else {
0068     // If the new field's value is Zero, then it is best to
0069     //  insure that it is not used for propagation.
0070     G4MagneticField* magField = NULL;
0071     fieldMgr->SetDetectorField(magField);
0072   }
0073 }
0074
0075 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
0076 G4FieldManager* ExErrorMagneticField::GetGlobalFieldManager()
0077 {
0078   return G4TransportationManager::GetTransportationManager()->GetFieldManager();
0079 }