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25 // 25 //
26 // G4LineCurrentMagField implementation << 26 // $Id: G4LineCurrentMagField.cc,v 1.6 2006/06/29 18:24:13 gunter Exp $
27 // << 27 // GEANT4 tag $Name: geant4-09-02-patch-04 $
28 // Author: V.Grichine, 03.02.1997 <<
29 // ------------------------------------------- 28 // -------------------------------------------------------------------
30 29
31 #include "G4LineCurrentMagField.hh" 30 #include "G4LineCurrentMagField.hh"
32 #include "globals.hh" 31 #include "globals.hh"
33 32
34 G4LineCurrentMagField::G4LineCurrentMagField(G 33 G4LineCurrentMagField::G4LineCurrentMagField(G4double pFieldConstant)
35 { 34 {
36 fFieldConstant = pFieldConstant ; 35 fFieldConstant = pFieldConstant ;
37 } 36 }
>> 37 ////////////////////////////////////////////////////////////////////////
38 38
39 // ------------------------------------------- << 39 G4LineCurrentMagField::~G4LineCurrentMagField()
40 <<
41 G4Field* G4LineCurrentMagField::Clone() const <<
42 { 40 {
43 return new G4LineCurrentMagField( fFieldCon <<
44 } 41 }
45 42
46 // ------------------------------------------- << 43 ///////////////////////////////////////////////////////////////////////////
47 <<
48 G4LineCurrentMagField::~G4LineCurrentMagField( <<
49 44
50 // ------------------------------------------- <<
51 45
52 void G4LineCurrentMagField::GetFieldValue(cons << 46 void G4LineCurrentMagField::GetFieldValue( const G4double yTrack[7],
53 << 47 G4double B[3] ) const
54 { 48 {
55 // G4double fFieldConstant = 100 ; 49 // G4double fFieldConstant = 100 ;
56 G4double a = 1.00 ; // mm << 50 G4double a = 1.00*mm ; // mm -> m
57 G4double x = a*yTrack[0], y = a*yTrack[1] ; 51 G4double x = a*yTrack[0], y = a*yTrack[1] ;
58 G4double x2 = x*x, y2 = y*y, r2 = x2 + y2 ; 52 G4double x2 = x*x, y2 = y*y, r2 = x2 + y2 ;
59 G4double r = std::sqrt(r2+a*a) ; 53 G4double r = std::sqrt(r2+a*a) ;
60 G4double Br = fFieldConstant/r; 54 G4double Br = fFieldConstant/r;
61 B[0] = -Br*y/r ; 55 B[0] = -Br*y/r ;
62 B[1] = Br*x/r ; 56 B[1] = Br*x/r ;
63 B[2] = 0.0 ; << 57 B[2] = 0 ;
64 } 58 }
65 59
66 // ------------------------------------------- 60 // -----------------------------------------------------------------
67 61