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25 // 25 //
26 ////////////////////////////////////////////// 26 ///////////////////////////////////////////////////////////////////////////////
27 // File: CCalMagneticField.cc 27 // File: CCalMagneticField.cc
28 // Description: User Field class implementatio 28 // Description: User Field class implementation.
29 ////////////////////////////////////////////// 29 ///////////////////////////////////////////////////////////////////////////////
30 #include <fstream> <<
31 <<
32 #include "CCalMagneticField.hh" 30 #include "CCalMagneticField.hh"
33 #include "CCalutils.hh" 31 #include "CCalutils.hh"
34 #include "G4SystemOfUnits.hh" <<
35 #include "G4FieldManager.hh" 32 #include "G4FieldManager.hh"
>> 33 #include <fstream>
36 34
37 //#define ddebug 35 //#define ddebug
38 //#define debug 36 //#define debug
39 37
40 //Constructor and destructor: 38 //Constructor and destructor:
41 39
42 CCalMagneticField::CCalMagneticField(const G4S 40 CCalMagneticField::CCalMagneticField(const G4String &filename) :
43 fval(0), pos(0), slope(0), intercept(0) << 41 fval(0), pos(0), slope(0), intercept(0) {
44 { <<
45 #ifdef debug <<
46 fVerbosity = 1; <<
47 #else <<
48 fVerbosity = 0; <<
49 #endif <<
50 42
51 //Let's open the file 43 //Let's open the file
52 G4cout << " ==> Opening file " << filename < 44 G4cout << " ==> Opening file " << filename << " to read magnetic field..."
53 << G4endl; << 45 << G4endl;
54 G4String pathName = std::getenv("CCAL_GLOBAL << 46 G4String pathName = getenv("CCAL_GLOBALPATH");
55 std::ifstream is; 47 std::ifstream is;
56 G4bool ok = openGeomFile(is, pathName, filen << 48 bool ok = openGeomFile(is, pathName, filename);
57 << 49
58 if (ok) { 50 if (ok) {
59 findDO(is, G4String("FLDM")); 51 findDO(is, G4String("FLDM"));
60 is >> fval >> npts >> xoff; 52 is >> fval >> npts >> xoff;
61 << 53 #ifdef debug
62 if (fVerbosity) << 54 G4cout << "Field value " << fval << " # points " << npts << " offset in x "
63 G4cout << "Field value " << fval << " # << 55 << xoff*mm << G4endl;
64 " offset in x " << 56 #endif
65 << xoff*mm << G4endl; <<
66 57
67 if (npts > 0) { 58 if (npts > 0) {
68 pos = new G4double[npts]; 59 pos = new G4double[npts];
69 slope = new G4double[npts]; 60 slope = new G4double[npts];
70 intercept = new G4double[npts]; 61 intercept = new G4double[npts];
71 62
72 for (G4int i = 0; i < npts; i++) { 63 for (G4int i = 0; i < npts; i++) {
73 is >> pos[i] >> slope[i] >> intercept[ << 64 is >> pos[i] >> slope[i] >> intercept[i];
74 if (fVerbosity) << 65 #ifdef debug
75 G4cout << tab << "Position " << i << << 66 G4cout << tab << "Position " << i << " " << pos[i] << " Slope "
76 << slope[i] << " Intercept " << 67 << slope[i] << " Intercept " << intercept[i] << G4endl;
>> 68 #endif
77 } 69 }
78 } 70 }
79 71
80 ////////////////////////////////////////// 72 ///////////////////////////////////////////////////////////////
81 // Close the file 73 // Close the file
82 G4cout << " ==> Closing file " << filename 74 G4cout << " ==> Closing file " << filename << G4endl;
83 is.close(); 75 is.close();
84 } 76 }
85 } 77 }
86 78
87 79
88 CCalMagneticField::~CCalMagneticField() { 80 CCalMagneticField::~CCalMagneticField() {
89 if (pos) 81 if (pos)
90 delete[] pos; 82 delete[] pos;
91 if (slope) 83 if (slope)
92 delete[] slope; 84 delete[] slope;
93 if (intercept) 85 if (intercept)
94 delete[] intercept; 86 delete[] intercept;
95 } 87 }
96 88
97 89
98 // Member functions 90 // Member functions
99 91
100 void CCalMagneticField::MagneticField(const G4 << 92 void CCalMagneticField::MagneticField(const double x[3], double B[3]) const {
101 { << 93
102 G4int i=0; 94 G4int i=0;
103 for (i=0; i<2; i++) { 95 for (i=0; i<2; i++) {
104 B[i] = 0*kilogauss; 96 B[i] = 0*kilogauss;
105 } 97 }
106 98
107 G4double m1=0; << 99 G4double m=0, c=0;
108 G4double c1=0; <<
109 G4double xnew = x[0]/mm + xoff; 100 G4double xnew = x[0]/mm + xoff;
110 if (npts > 0) { 101 if (npts > 0) {
111 for (i=0; i<npts; i++) { 102 for (i=0; i<npts; i++) {
112 if (xnew > pos[i]*mm) { 103 if (xnew > pos[i]*mm) {
113 m1 = slope[i]; << 104 m = slope[i];
114 c1 = intercept[i]; << 105 c = intercept[i];
115 } 106 }
116 } 107 }
117 } 108 }
118 G4double scor = c1 + m*xnew; << 109 G4double scor = c + m*xnew;
119 if (scor < 0.) scor = 0.; 110 if (scor < 0.) scor = 0.;
120 if (scor > 1.) scor = 1.0; 111 if (scor > 1.) scor = 1.0;
121 112
122 B[2] = scor*fval*kilogauss; 113 B[2] = scor*fval*kilogauss;
123 if (fVerbosity) << 114 #ifdef ddebug
124 { << 115 G4cout << "Field at x: " << x[0]/mm << "mm (" << xnew << ") = " << B[2]/tesla
125 << 116 << "T (m = " << m << ", c = " << c << ", scale = " << scor << ")"
126 G4cout << "Field at x: " << x[0]/mm << " << 117 << G4endl;
127 B[2]/tesla << 118 #endif
128 << "T (m = " << m1 << ", c = " << <<
129 c1 << ", scale = " << scor << ")" <<
130 << G4endl; <<
131 } <<
132 } 119 }
133 120
134 121
135 CLHEP::Hep3Vector CCalMagneticField:: 122 CLHEP::Hep3Vector CCalMagneticField::
136 MagneticField(const CLHEP::Hep3Vector point) c 123 MagneticField(const CLHEP::Hep3Vector point) const {
137 124
138 G4double x[3],B[3]; 125 G4double x[3],B[3];
139 CLHEP::Hep3Vector v; 126 CLHEP::Hep3Vector v;
140 127
141 x[0] = point.x(); 128 x[0] = point.x();
142 x[1] = point.y(); 129 x[1] = point.y();
143 x[2] = point.z(); 130 x[2] = point.z();
144 CCalMagneticField::MagneticField(x, B); 131 CCalMagneticField::MagneticField(x, B);
145 v.setX(B[0]); 132 v.setX(B[0]);
146 v.setY(B[1]); 133 v.setY(B[1]);
147 v.setZ(B[2]); 134 v.setZ(B[2]);
148 return v; 135 return v;
149 } 136 }
150 137
151 138
152 void CCalMagneticField::GetFieldValue(const G4 << 139 void CCalMagneticField::GetFieldValue(const double x[3], double* B) const {
153 CCalMagneticField::MagneticField(x, B); 140 CCalMagneticField::MagneticField(x, B);
154 } 141 }
155 142
156 143