| Geant4 Cross Reference |
1 // 1 //
2 // ******************************************* 2 // ********************************************************************
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4 // * 4 // * *
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19 // * technical work of the GEANT4 collaboratio << 17 // * GEANT4 collaboration. *
20 // * By using, copying, modifying or distri << 18 // * By copying, distributing or modifying the Program (or any work *
21 // * any work based on the software) you ag << 19 // * based on the Program) you indicate your acceptance of this *
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24 // ******************************************* 21 // ********************************************************************
25 // 22 //
26 // G4LineCurrentMagField implementation << 23 // $Id: G4LineCurrentMagField.cc,v 1.5 2004/12/02 09:55:20 gcosmo Exp $
27 // << 24 // GEANT4 tag $Name: geant4-07-00-patch-01 $
28 // Author: V.Grichine, 03.02.1997 <<
29 // ------------------------------------------- 25 // -------------------------------------------------------------------
30 26
31 #include "G4LineCurrentMagField.hh" 27 #include "G4LineCurrentMagField.hh"
32 #include "globals.hh" 28 #include "globals.hh"
33 29
34 G4LineCurrentMagField::G4LineCurrentMagField(G 30 G4LineCurrentMagField::G4LineCurrentMagField(G4double pFieldConstant)
35 { 31 {
36 fFieldConstant = pFieldConstant ; 32 fFieldConstant = pFieldConstant ;
37 } 33 }
>> 34 ////////////////////////////////////////////////////////////////////////
38 35
39 // ------------------------------------------- << 36 G4LineCurrentMagField::~G4LineCurrentMagField()
40 <<
41 G4Field* G4LineCurrentMagField::Clone() const <<
42 { 37 {
43 return new G4LineCurrentMagField( fFieldCon <<
44 } 38 }
45 39
46 // ------------------------------------------- << 40 ///////////////////////////////////////////////////////////////////////////
47 <<
48 G4LineCurrentMagField::~G4LineCurrentMagField( <<
49 41
50 // ------------------------------------------- <<
51 42
52 void G4LineCurrentMagField::GetFieldValue(cons << 43 void G4LineCurrentMagField::GetFieldValue( const G4double yTrack[7],
53 << 44 G4double B[3] ) const
54 { 45 {
55 // G4double fFieldConstant = 100 ; 46 // G4double fFieldConstant = 100 ;
56 G4double a = 1.00 ; // mm << 47 G4double a = 1.00*mm ; // mm -> m
57 G4double x = a*yTrack[0], y = a*yTrack[1] ; 48 G4double x = a*yTrack[0], y = a*yTrack[1] ;
58 G4double x2 = x*x, y2 = y*y, r2 = x2 + y2 ; 49 G4double x2 = x*x, y2 = y*y, r2 = x2 + y2 ;
59 G4double r = std::sqrt(r2+a*a) ; 50 G4double r = std::sqrt(r2+a*a) ;
60 G4double Br = fFieldConstant/r; 51 G4double Br = fFieldConstant/r;
61 B[0] = -Br*y/r ; 52 B[0] = -Br*y/r ;
62 B[1] = Br*x/r ; 53 B[1] = Br*x/r ;
63 B[2] = 0.0 ; << 54 B[2] = 0 ;
64 } 55 }
65 56
66 // ------------------------------------------- 57 // -----------------------------------------------------------------
67 58