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G4QuadrupoleMagField.cc
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27 // $Id: G4QuadrupoleMagField.cc 96751 2016-05-04 09:39:38Z gcosmo $
28 //
29 // -------------------------------------------------------------------
30 
31 #include "G4QuadrupoleMagField.hh"
32 #include "G4RotationMatrix.hh"
33 
35 
37 {
38  fGradient = pGradient ;
39  fOrigin = G4ThreeVector( 0.0, 0.0, 0.0) ;
41 }
42 
43 
45 
47  G4ThreeVector pOrigin,
48  G4RotationMatrix* pMatrix)
49 {
50  fGradient = pGradient ;
51  fOrigin = pOrigin ;
52  fpMatrix = pMatrix ;
53 }
54 
56 {
58 }
59 
61 
63 {
64 }
65 
67 // Allow displaced origin and rotation
68 // Extensions by Björn Riese (GSI)
69 
71  G4double B[3] ) const
72 {
73  G4ThreeVector r_global = G4ThreeVector(
74  y[0] - fOrigin.x(),
75  y[1] - fOrigin.y(),
76  y[2] - fOrigin.z());
77 
78  G4ThreeVector r_local = G4ThreeVector(
79  fpMatrix->colX() * r_global,
80  fpMatrix->colY() * r_global,
81  fpMatrix->colZ() * r_global);
82 
83  G4ThreeVector B_local = G4ThreeVector(
84  fGradient * r_local.y(),
85  fGradient * r_local.x(),
86  0);
87 
88  G4ThreeVector B_global = G4ThreeVector(
89  fpMatrix->inverse().rowX() * B_local,
90  fpMatrix->inverse().rowY() * B_local,
91  fpMatrix->inverse().rowZ() * B_local);
92 
93  B[0] = B_global.x() ;
94  B[1] = B_global.y() ;
95  B[2] = B_global.z() ;
96 }
Hep3Vector colY() const
CLHEP::Hep3Vector G4ThreeVector
static G4RotationMatrix IdentityMatrix
Float_t y
Definition: compare.C:6
double z() const
Hep3Vector colZ() const
G4Field * Clone() const
Hep3Vector colX() const
Hep3Vector rowX() const
G4RotationMatrix * fpMatrix
double G4double
Definition: G4Types.hh:76
G4QuadrupoleMagField(G4double pGradient)
Hep3Vector rowZ() const
double x() const
Hep3Vector rowY() const
double y() const
void GetFieldValue(const G4double yTrack[], G4double B[]) const
double B(double temperature)
HepRotation inverse() const