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1 // 1 //
2 // ******************************************* 2 // ********************************************************************
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24 // ******************************************* 24 // ********************************************************************
25 // 25 //
>> 26 // $Id: G4ErrorMagFieldLimitProcess.cc,v 1.2 2007/05/29 14:41:35 gcosmo Exp $
>> 27 // GEANT4 tag $Name: geant4-09-01-patch-01 $
26 // 28 //
27 // ------------------------------------------- 29 // ------------------------------------------------------------
28 // GEANT 4 class implementation file << 30 // GEANT 4 class implementation file
29 // ------------------------------------------- 31 // ------------------------------------------------------------
30 // 32 //
31 33
32 #include "G4ErrorMagFieldLimitProcess.hh" 34 #include "G4ErrorMagFieldLimitProcess.hh"
33 #include "G4ErrorMessenger.hh" 35 #include "G4ErrorMessenger.hh"
34 #include "G4TransportationManager.hh" 36 #include "G4TransportationManager.hh"
35 #include "G4FieldManager.hh" 37 #include "G4FieldManager.hh"
36 #include "G4Field.hh" 38 #include "G4Field.hh"
37 #include "G4Track.hh" 39 #include "G4Track.hh"
38 40
39 #ifdef G4VERBOSE 41 #ifdef G4VERBOSE
40 # include "G4ErrorPropagatorData.hh" << 42 #include "G4ErrorPropagatorData.hh"
41 #endif 43 #endif
42 44
43 //-------------------------------------------- 45 //------------------------------------------------------------------------
44 G4ErrorMagFieldLimitProcess::G4ErrorMagFieldLi << 46 G4ErrorMagFieldLimitProcess::
45 const G4String& processName) << 47 G4ErrorMagFieldLimitProcess(const G4String& processName)
46 : G4VErrorLimitProcess(processName) << 48 : G4VErrorLimitProcess(processName)
47 { 49 {
48 theStepLimit = kInfinity; 50 theStepLimit = kInfinity;
49 } 51 }
50 52
>> 53
51 //-------------------------------------------- 54 //------------------------------------------------------------------------
52 G4ErrorMagFieldLimitProcess::~G4ErrorMagFieldL << 55 G4ErrorMagFieldLimitProcess::~G4ErrorMagFieldLimitProcess()
>> 56 { }
>> 57
53 58
54 //-------------------------------------------- 59 //------------------------------------------------------------------------
55 G4double G4ErrorMagFieldLimitProcess::PostStep << 60 G4double G4ErrorMagFieldLimitProcess::
56 const G4Track& aTrack, G4double, G4ForceCond << 61 PostStepGetPhysicalInteractionLength( const G4Track& aTrack, G4double ,
>> 62 G4ForceCondition* condition )
57 { 63 {
58 *condition = NotForced; << 64 *condition = NotForced;
59 const G4Field* field = G4TransportationManag << 65 const G4Field* field =
60 ->GetFieldManager() << 66 G4TransportationManager::GetTransportationManager()->GetFieldManager()
61 ->GetDetectorField( << 67 ->GetDetectorField();
62 68
63 theStepLength = kInfinity; 69 theStepLength = kInfinity;
64 if(field != 0) << 70 if( field != 0 ) {
65 { <<
66 G4ThreeVector trkPosi = aTrack.GetPosition 71 G4ThreeVector trkPosi = aTrack.GetPosition();
67 G4double pos1[3]; 72 G4double pos1[3];
68 pos1[0] = trkPosi.x(); << 73 pos1[0] = trkPosi.x(); pos1[1] = trkPosi.y(); pos1[2] = trkPosi.z();
69 pos1[1] = trkPosi.y(); <<
70 pos1[2] = trkPosi.z(); <<
71 74
72 G4double h1[3]; 75 G4double h1[3];
73 field->GetFieldValue(pos1, h1); << 76 field->GetFieldValue( pos1, h1 );
74 77
75 G4ThreeVector BVec(h1[0], h1[1], h1[2]); << 78 G4ThreeVector BVec(h1[0],h1[1],h1[2]);
76 G4double pmag = aTrack.GetMomentum().m << 79 G4double pmag = aTrack.GetMomentum().mag();
77 G4double BPerpMom = BVec.cross(G4ThreeVect << 80 G4double BPerpMom = BVec.cross( pmag ).mag() / pmag;
78 81
79 theStepLength = theStepLimit * pmag / BPer << 82 theStepLength = theStepLimit * pmag / BPerpMom;
80 #ifdef G4VERBOSE 83 #ifdef G4VERBOSE
81 if(G4ErrorPropagatorData::verbose() >= 3) << 84 if(G4ErrorPropagatorData::verbose() >= 3 ) {
82 { << 85 G4cout << "G4ErrorMagFieldLimitProcess:: stepLength "
83 G4cout << "G4ErrorMagFieldLimitProcess:: << 86 << theStepLength << " B " << BPerpMom << " BVec " << BVec
84 << " B " << BPerpMom << " BVec " << 87 << " pmag " << pmag << G4endl;
85 << G4endl; << 88 }
86 } <<
87 #endif 89 #endif
88 } 90 }
89 91
90 return theStepLength; 92 return theStepLength;
91 } 93 }
92 94