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1 // 1 //
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18 // * This code implementation is the result 18 // * This code implementation is the result of the scientific and *
19 // * technical work of the GEANT4 collaboratio 19 // * technical work of the GEANT4 collaboration. *
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24 // ******************************************* 24 // ********************************************************************
25 // 25 //
26 // 26 //
27 // ------------------------------------------- 27 // ------------------------------------------------------------
28 // GEANT 4 class implementation file 28 // GEANT 4 class implementation file
29 // ------------------------------------------- 29 // ------------------------------------------------------------
30 // 30 //
31 31
32 #include "G4ErrorMagFieldLimitProcess.hh" 32 #include "G4ErrorMagFieldLimitProcess.hh"
33 #include "G4ErrorMessenger.hh" 33 #include "G4ErrorMessenger.hh"
34 #include "G4TransportationManager.hh" 34 #include "G4TransportationManager.hh"
35 #include "G4FieldManager.hh" 35 #include "G4FieldManager.hh"
36 #include "G4Field.hh" 36 #include "G4Field.hh"
37 #include "G4Track.hh" 37 #include "G4Track.hh"
38 38
39 #ifdef G4VERBOSE 39 #ifdef G4VERBOSE
40 # include "G4ErrorPropagatorData.hh" 40 # include "G4ErrorPropagatorData.hh"
41 #endif 41 #endif
42 42
43 //-------------------------------------------- 43 //------------------------------------------------------------------------
44 G4ErrorMagFieldLimitProcess::G4ErrorMagFieldLi 44 G4ErrorMagFieldLimitProcess::G4ErrorMagFieldLimitProcess(
45 const G4String& processName) 45 const G4String& processName)
46 : G4VErrorLimitProcess(processName) 46 : G4VErrorLimitProcess(processName)
47 { 47 {
48 theStepLimit = kInfinity; 48 theStepLimit = kInfinity;
49 } 49 }
50 50
51 //-------------------------------------------- 51 //------------------------------------------------------------------------
52 G4ErrorMagFieldLimitProcess::~G4ErrorMagFieldL 52 G4ErrorMagFieldLimitProcess::~G4ErrorMagFieldLimitProcess() {}
53 53
54 //-------------------------------------------- 54 //------------------------------------------------------------------------
55 G4double G4ErrorMagFieldLimitProcess::PostStep 55 G4double G4ErrorMagFieldLimitProcess::PostStepGetPhysicalInteractionLength(
56 const G4Track& aTrack, G4double, G4ForceCond 56 const G4Track& aTrack, G4double, G4ForceCondition* condition)
57 { 57 {
58 *condition = NotForced; 58 *condition = NotForced;
59 const G4Field* field = G4TransportationManag 59 const G4Field* field = G4TransportationManager::GetTransportationManager()
60 ->GetFieldManager() 60 ->GetFieldManager()
61 ->GetDetectorField( 61 ->GetDetectorField();
62 62
63 theStepLength = kInfinity; 63 theStepLength = kInfinity;
64 if(field != 0) 64 if(field != 0)
65 { 65 {
66 G4ThreeVector trkPosi = aTrack.GetPosition 66 G4ThreeVector trkPosi = aTrack.GetPosition();
67 G4double pos1[3]; 67 G4double pos1[3];
68 pos1[0] = trkPosi.x(); 68 pos1[0] = trkPosi.x();
69 pos1[1] = trkPosi.y(); 69 pos1[1] = trkPosi.y();
70 pos1[2] = trkPosi.z(); 70 pos1[2] = trkPosi.z();
71 71
72 G4double h1[3]; 72 G4double h1[3];
73 field->GetFieldValue(pos1, h1); 73 field->GetFieldValue(pos1, h1);
74 74
75 G4ThreeVector BVec(h1[0], h1[1], h1[2]); 75 G4ThreeVector BVec(h1[0], h1[1], h1[2]);
76 G4double pmag = aTrack.GetMomentum().m 76 G4double pmag = aTrack.GetMomentum().mag();
77 G4double BPerpMom = BVec.cross(G4ThreeVect 77 G4double BPerpMom = BVec.cross(G4ThreeVector(pmag, 0., 0.)).mag() / pmag;
78 78
79 theStepLength = theStepLimit * pmag / BPer 79 theStepLength = theStepLimit * pmag / BPerpMom;
80 #ifdef G4VERBOSE 80 #ifdef G4VERBOSE
81 if(G4ErrorPropagatorData::verbose() >= 3) 81 if(G4ErrorPropagatorData::verbose() >= 3)
82 { 82 {
83 G4cout << "G4ErrorMagFieldLimitProcess:: 83 G4cout << "G4ErrorMagFieldLimitProcess:: stepLength " << theStepLength
84 << " B " << BPerpMom << " BVec " 84 << " B " << BPerpMom << " BVec " << BVec << " pmag " << pmag
85 << G4endl; 85 << G4endl;
86 } 86 }
87 #endif 87 #endif
88 } 88 }
89 89
90 return theStepLength; 90 return theStepLength;
91 } 91 }
92 92