include/Geant4/G4ElectroMagneticField.hh

0001 //
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0025 //
0026 // G4ElectroMagneticField
0027 //
0028 // Class description:
0029 //
0030 // A full electromagnetic field, containing both electric and magnetic fields.
0031 // It is an abstract class, and a derived type of this field must be
0032 // created by the user to describe his/her field configuration.
0033 //
0034 // We have established a convention for the electromagnetic field components:
0035 // In the GetValue() method, the return values of Bfield will have
0036 // the following meaning
0037 //  - Components 0, 1 and 2 are the Magnetic Field (x, y, z respectively);
0038 //  - Components 3, 4 and 5 are the Electric field (x, y, z respectively).
0039 //
0040 // Note 1: one or the other field could optional, depending on the Equation
0041 // Note 2: such a convention is required between any field and its
0042 //         corresponding equation of motion.
0043
0044 // Created: J.Apostolakis, 12.11.1998
0045 // Modified: V.Grichine, 08.11.2001: Extended "Point" to add time
0046 // -------------------------------------------------------------------
0047 #ifndef G4ELECTROMAGNETIC_FIELD_HH
0048 #define G4ELECTROMAGNETIC_FIELD_HH
0049
0050 #include "G4Field.hh"
0051
0052 class G4ElectroMagneticField : public G4Field
0053 {
0054   public:
0055
0056     G4ElectroMagneticField();
0057    ~G4ElectroMagneticField() override;
0058
0059     G4ElectroMagneticField(const G4ElectroMagneticField& r);
0060     G4ElectroMagneticField& operator = (const G4ElectroMagneticField& p);
0061       // Copy constructor & assignment operators.
0062
0063     void  GetFieldValue(const G4double Point[4],
0064                               G4double *Bfield ) const override = 0;
0065       // Return as Bfield[0], [1], [2] the magnetic field x, y & z components
0066       // and    as Bfield[3], [4], [5] the electric field x, y & z components
0067
0068     G4bool DoesFieldChangeEnergy() const override = 0;
0069       // For field with an electric component this should be true
0070       // For pure magnetic field this should be false
0071       // Alternative: default safe implementation { return true; }
0072 };
0073
0074 #endif