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25 //
26 // G4UniformMagField implementation
27 //
28 // Created: V.Grichine, 30.01.1997
29 // -------------------------------------------------------------------
30
31 #include "G4UniformMagField.hh"
32 #include "G4PhysicalConstants.hh"
33
34 G4UniformMagField::G4UniformMagField(const G4ThreeVector& FieldVector )
35 {
36 fFieldComponents[0] = FieldVector.x();
37 fFieldComponents[1] = FieldVector.y();
38 fFieldComponents[2] = FieldVector.z();
39 }
40
41 G4UniformMagField::~G4UniformMagField() = default;
42
43 G4UniformMagField::G4UniformMagField (const G4UniformMagField& p)
44 : G4MagneticField(p)
45 {
46 for (auto i=0; i<3; ++i)
47 {
48 fFieldComponents[i] = p.fFieldComponents[i];
49 }
50 }
51
52 G4UniformMagField& G4UniformMagField::operator = (const G4UniformMagField& p)
53 {
54 if (&p == this) { return *this;}
55 G4MagneticField::operator=(p);
56 for (auto i=0; i<3; ++i)
57 {
58 fFieldComponents[i] = p.fFieldComponents[i];
59 }
60 return *this;
61 }
62
63 G4Field* G4UniformMagField::Clone() const
64 {
65 return new G4UniformMagField( G4ThreeVector(fFieldComponents[0],
66 fFieldComponents[1],
67 fFieldComponents[2]) );
68 }
69
70 void
71 G4UniformMagField::SetFieldValue(const G4ThreeVector& newFieldVector )
72 {
73 fFieldComponents[0] = newFieldVector.x();
74 fFieldComponents[1] = newFieldVector.y();
75 fFieldComponents[2] = newFieldVector.z();
76 }
77
78 G4UniformMagField::G4UniformMagField(G4double vField,
79 G4double vTheta,
80 G4double vPhi)
81 {
82 if ( (vField<0) || (vTheta<0) || (vTheta>pi) || (vPhi<0) || (vPhi>twopi) )
83 {
84 std::ostringstream msg;
85 msg << "ERROR in G4UniformMagField::G4UniformMagField() : "
86 << "Invalid parameter(s). " << std::endl;
87 msg << " Expected " << std::endl;
88
89 msg << " - Magnitude vField: Value = " << vField
90 << " Expected vField > 0 " ;
91 if ( vField<0) { msg << " <------ Erroneous "; }
92 msg << std::endl;
93
94 msg << " - Theta angle: Value = " << vTheta
95 << " Expected between 0 <= theta <= pi = " << pi << " ";
96 if ( (vTheta<0) || (vTheta>pi) ) { msg << " <------ Erroneous "; }
97
98 msg << std::endl;
99 msg << " - Phi angle: Value = " << vPhi
100 << " Expected between 0 <= phi <= 2*pi = " << twopi << std::endl;
101 if ( (vPhi<0) || (vPhi>twopi) ) { msg << " <------ Erroneous "; }
102
103 G4Exception("G4UniformMagField::G4UniformMagField()",
104 "GeomField0002", FatalException, msg );
105 }
106 fFieldComponents[0] = vField*std::sin(vTheta)*std::cos(vPhi) ;
107 fFieldComponents[1] = vField*std::sin(vTheta)*std::sin(vPhi) ;
108 fFieldComponents[2] = vField*std::cos(vTheta) ;
109 }
110
111 // ------------------------------------------------------------------------
112
113 void G4UniformMagField::GetFieldValue (const G4double [4],
114 G4double* B) const
115 {
116 B[0]= fFieldComponents[0];
117 B[1]= fFieldComponents[1];
118 B[2]= fFieldComponents[2];
119 }
120
121 G4ThreeVector G4UniformMagField::GetConstantFieldValue() const
122 {
123 G4ThreeVector B(fFieldComponents[0],
124 fFieldComponents[1],
125 fFieldComponents[2]);
126 return B;
127 }
128