Geant4 Cross Reference |
1 // 1 2 // ******************************************* 3 // * License and Disclaimer 4 // * 5 // * The Geant4 software is copyright of th 6 // * the Geant4 Collaboration. It is provided 7 // * conditions of the Geant4 Software License 8 // * LICENSE and available at http://cern.ch/ 9 // * include a list of copyright holders. 10 // * 11 // * Neither the authors of this software syst 12 // * institutes,nor the agencies providing fin 13 // * work make any representation or warran 14 // * regarding this software system or assum 15 // * use. Please see the license in the file 16 // * for the full disclaimer and the limitatio 17 // * 18 // * This code implementation is the result 19 // * technical work of the GEANT4 collaboratio 20 // * By using, copying, modifying or distri 21 // * any work based on the software) you ag 22 // * use in resulting scientific publicati 23 // * acceptance of all terms of the Geant4 Sof 24 // ******************************************* 25 // 26 // 27 // ------------------------------------------- 28 // GEANT 4 class implementation file 29 // ------------------------------------------- 30 // 31 32 #include "G4ErrorMagFieldLimitProcess.hh" 33 #include "G4ErrorMessenger.hh" 34 #include "G4TransportationManager.hh" 35 #include "G4FieldManager.hh" 36 #include "G4Field.hh" 37 #include "G4Track.hh" 38 39 #ifdef G4VERBOSE 40 # include "G4ErrorPropagatorData.hh" 41 #endif 42 43 //-------------------------------------------- 44 G4ErrorMagFieldLimitProcess::G4ErrorMagFieldLi 45 const G4String& processName) 46 : G4VErrorLimitProcess(processName) 47 { 48 theStepLimit = kInfinity; 49 } 50 51 //-------------------------------------------- 52 G4ErrorMagFieldLimitProcess::~G4ErrorMagFieldL 53 54 //-------------------------------------------- 55 G4double G4ErrorMagFieldLimitProcess::PostStep 56 const G4Track& aTrack, G4double, G4ForceCond 57 { 58 *condition = NotForced; 59 const G4Field* field = G4TransportationManag 60 ->GetFieldManager() 61 ->GetDetectorField( 62 63 theStepLength = kInfinity; 64 if(field != 0) 65 { 66 G4ThreeVector trkPosi = aTrack.GetPosition 67 G4double pos1[3]; 68 pos1[0] = trkPosi.x(); 69 pos1[1] = trkPosi.y(); 70 pos1[2] = trkPosi.z(); 71 72 G4double h1[3]; 73 field->GetFieldValue(pos1, h1); 74 75 G4ThreeVector BVec(h1[0], h1[1], h1[2]); 76 G4double pmag = aTrack.GetMomentum().m 77 G4double BPerpMom = BVec.cross(G4ThreeVect 78 79 theStepLength = theStepLimit * pmag / BPer 80 #ifdef G4VERBOSE 81 if(G4ErrorPropagatorData::verbose() >= 3) 82 { 83 G4cout << "G4ErrorMagFieldLimitProcess:: 84 << " B " << BPerpMom << " BVec " 85 << G4endl; 86 } 87 #endif 88 } 89 90 return theStepLength; 91 } 92