ECCE @ EIC Software
Reference for
ECCE @ EIC
simulation and reconstruction software on GitHub
Home page
Related Pages
Modules
Namespaces
Classes
Files
External Links
File List
File Members
All
Classes
Namespaces
Files
Functions
Variables
Typedefs
Enumerations
Enumerator
Friends
Macros
Groups
Pages
G4QuadrupoleMagField.cc
Go to the documentation of this file.
Or view
the newest version in sPHENIX GitHub for file G4QuadrupoleMagField.cc
1
//
2
// ********************************************************************
3
// * License and Disclaimer *
4
// * *
5
// * The Geant4 software is copyright of the Copyright Holders of *
6
// * the Geant4 Collaboration. It is provided under the terms and *
7
// * conditions of the Geant4 Software License, included in the file *
8
// * LICENSE and available at http://cern.ch/geant4/license . These *
9
// * include a list of copyright holders. *
10
// * *
11
// * Neither the authors of this software system, nor their employing *
12
// * institutes,nor the agencies providing financial support for this *
13
// * work make any representation or warranty, express or implied, *
14
// * regarding this software system or assume any liability for its *
15
// * use. Please see the license in the file LICENSE and URL above *
16
// * for the full disclaimer and the limitation of liability. *
17
// * *
18
// * This code implementation is the result of the scientific and *
19
// * technical work of the GEANT4 collaboration. *
20
// * By using, copying, modifying or distributing the software (or *
21
// * any work based on the software) you agree to acknowledge its *
22
// * use in resulting scientific publications, and indicate your *
23
// * acceptance of all terms of the Geant4 Software license. *
24
// ********************************************************************
25
//
26
// G4QuadrupoleMagField implementation
27
//
28
// 03.02.1997, V.Grichine - Created
29
// 11.05.2012, B.Riese - Allow displaced origin and rotation
30
// -------------------------------------------------------------------
31
32
#include "
G4QuadrupoleMagField.hh
"
33
#include "
G4RotationMatrix.hh
"
34
35
namespace
36
{
37
G4RotationMatrix
IdentityMatrix;
38
}
39
40
G4QuadrupoleMagField::G4QuadrupoleMagField
(
G4double
pGradient)
41
{
42
fGradient
= pGradient;
43
fpMatrix
= &IdentityMatrix;
44
}
45
46
// -------------------------------------------------------------------
47
48
G4QuadrupoleMagField::G4QuadrupoleMagField
(
G4double
pGradient,
49
G4ThreeVector
pOrigin,
50
G4RotationMatrix
* pMatrix)
51
{
52
fGradient
= pGradient ;
53
fOrigin
= pOrigin ;
54
fpMatrix
= pMatrix ;
55
}
56
57
// -------------------------------------------------------------------
58
59
G4Field
*
G4QuadrupoleMagField::Clone
()
const
60
{
61
return
new
G4QuadrupoleMagField
(
fGradient
,
fOrigin
,
fpMatrix
);
62
}
63
64
// -------------------------------------------------------------------
65
66
G4QuadrupoleMagField::~G4QuadrupoleMagField
()
67
{
68
}
69
70
// -------------------------------------------------------------------
71
72
void
G4QuadrupoleMagField::GetFieldValue
(
const
G4double
y
[7],
73
G4double
B
[3] )
const
74
{
75
// with displaced origin and rotation
76
77
G4ThreeVector
r_global =
G4ThreeVector
(y[0] -
fOrigin
.
x
(),
78
y[1] -
fOrigin
.
y
(),
79
y[2] -
fOrigin
.
z
());
80
81
const
G4ThreeVector
r_local = (*fpMatrix) * r_global;
82
const
G4ThreeVector
B_local(
fGradient
* r_local.y(),
83
fGradient
* r_local.x(), 0);
84
const
G4ThreeVector
B_global =
fpMatrix
->
inverse
() * B_local;
85
86
B[0] = B_global.x();
87
B[1] = B_global.y();
88
B[2] = B_global.z();
89
}
geant4
tree
geant4-10.6-release
source
geometry
magneticfield
src
G4QuadrupoleMagField.cc
Built by
Jin Huang
. updated:
Wed Jun 29 2022 17:25:16
using
1.8.2 with
ECCE GitHub integration