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1 // 2 // ******************************************************************** 3 // * License and Disclaimer * 4 // * * 5 // * The Geant4 software is copyright of the Copyright Holders of * 6 // * the Geant4 Collaboration. It is provided under the terms and * 7 // * conditions of the Geant4 Software License, included in the file * 8 // * LICENSE and available at http://cern.ch/geant4/license . These * 9 // * include a list of copyright holders. * 10 // * * 11 // * Neither the authors of this software system, nor their employing * 12 // * institutes,nor the agencies providing financial support for this * 13 // * work make any representation or warranty, express or implied, * 14 // * regarding this software system or assume any liability for its * 15 // * use. Please see the license in the file LICENSE and URL above * 16 // * for the full disclaimer and the limitation of liability. * 17 // * * 18 // * This code implementation is the result of the scientific and * 19 // * technical work of the GEANT4 collaboration. * 20 // * By using, copying, modifying or distributing the software (or * 21 // * any work based on the software) you agree to acknowledge its * 22 // * use in resulting scientific publications, and indicate your * 23 // * acceptance of all terms of the Geant4 Software license. * 24 // ******************************************************************** 25 // 26 // 27 /// \file B5/src/MagneticField.cc 28 /// \brief Implementation of the B5::MagneticField class 29 30 #include "MagneticField.hh" 31 32 #include "G4GenericMessenger.hh" 33 34 namespace B5 35 { 36 37 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo...... 38 39 MagneticField::MagneticField() 40 { 41 // define commands for this class 42 DefineCommands(); 43 } 44 45 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo...... 46 47 MagneticField::~MagneticField() 48 { 49 delete fMessenger; 50 } 51 52 void MagneticField::GetFieldValue(const G4double[4], double* bField) const 53 { 54 bField[0] = 0.; 55 bField[1] = fBy; 56 bField[2] = 0.; 57 } 58 59 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo...... 60 61 void MagneticField::DefineCommands() 62 { 63 // Define /B5/field command directory using generic messenger class 64 fMessenger = new G4GenericMessenger(this, "/B5/field/", "Field control"); 65 66 // fieldValue command 67 auto& valueCmd = fMessenger->DeclareMethodWithUnit("value", "tesla", &MagneticField::SetField, 68 "Set field strength."); 69 valueCmd.SetParameterName("field", true); 70 valueCmd.SetDefaultValue("1."); 71 } 72 73 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo...... 74 75 } // namespace B5 76