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24 // ******************************************* 24 // ********************************************************************
25 // 25 //
26 // G4LineCurrentMagField implementation 26 // G4LineCurrentMagField implementation
27 // 27 //
28 // Author: V.Grichine, 03.02.1997 28 // Author: V.Grichine, 03.02.1997
29 // ------------------------------------------- 29 // -------------------------------------------------------------------
30 30
31 #include "G4LineCurrentMagField.hh" 31 #include "G4LineCurrentMagField.hh"
32 #include "globals.hh" 32 #include "globals.hh"
33 33
34 G4LineCurrentMagField::G4LineCurrentMagField(G 34 G4LineCurrentMagField::G4LineCurrentMagField(G4double pFieldConstant)
35 { 35 {
36 fFieldConstant = pFieldConstant ; 36 fFieldConstant = pFieldConstant ;
37 } 37 }
38 38
39 // ------------------------------------------- 39 // -----------------------------------------------------------------
40 40
41 G4Field* G4LineCurrentMagField::Clone() const 41 G4Field* G4LineCurrentMagField::Clone() const
42 { 42 {
43 return new G4LineCurrentMagField( fFieldCon 43 return new G4LineCurrentMagField( fFieldConstant );
44 } 44 }
45 45
46 // ------------------------------------------- 46 // -----------------------------------------------------------------
47 47
48 G4LineCurrentMagField::~G4LineCurrentMagField( << 48 G4LineCurrentMagField::~G4LineCurrentMagField()
>> 49 {
>> 50 }
49 51
50 // ------------------------------------------- 52 // -----------------------------------------------------------------
51 53
52 void G4LineCurrentMagField::GetFieldValue(cons << 54 void G4LineCurrentMagField::GetFieldValue( const G4double yTrack[7],
53 << 55 G4double B[3] ) const
54 { 56 {
55 // G4double fFieldConstant = 100 ; 57 // G4double fFieldConstant = 100 ;
56 G4double a = 1.00 ; // mm 58 G4double a = 1.00 ; // mm
57 G4double x = a*yTrack[0], y = a*yTrack[1] ; 59 G4double x = a*yTrack[0], y = a*yTrack[1] ;
58 G4double x2 = x*x, y2 = y*y, r2 = x2 + y2 ; 60 G4double x2 = x*x, y2 = y*y, r2 = x2 + y2 ;
59 G4double r = std::sqrt(r2+a*a) ; 61 G4double r = std::sqrt(r2+a*a) ;
60 G4double Br = fFieldConstant/r; 62 G4double Br = fFieldConstant/r;
61 B[0] = -Br*y/r ; 63 B[0] = -Br*y/r ;
62 B[1] = Br*x/r ; 64 B[1] = Br*x/r ;
63 B[2] = 0.0 ; 65 B[2] = 0.0 ;
64 } 66 }
65 67
66 // ------------------------------------------- 68 // -----------------------------------------------------------------
67 69