| Geant4 Cross Reference |
1 // 1 //
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24 // ******************************************* 21 // ********************************************************************
25 // 22 //
26 // G4Field << 23 //
>> 24 // $Id: G4Field.hh,v 1.6 2001/11/08 17:31:07 grichine Exp $
>> 25 // GEANT4 tag $Name: geant4-04-00 $
>> 26 //
>> 27 //
>> 28 // class G4Field
27 // 29 //
28 // Class description: 30 // Class description:
29 // 31 //
30 // Abstract class for any kind of Field. 32 // Abstract class for any kind of Field.
31 // It allows any kind of field (vector, scalar 33 // It allows any kind of field (vector, scalar, tensor and any set of them)
32 // to be defined by implementing the inquiry f 34 // to be defined by implementing the inquiry function interface.
33 // <<
34 // The key method is GetFieldValue( const do <<
35 // ************* do <<
36 // Given an input position/time vector 'Point' <<
37 // this method must return the value of the fi <<
38 // <<
39 // A field must also specify whether it change <<
40 // DoesFieldChangeEnergy() <<
41 // ********************* <<
42 // A field must co-work with a corresponding E <<
43 // enable the integration of a particle's posi <<
44 // spin. For this a field and its equation of <<
45 // same convention for the order of field comp <<
46 35
47 // Created: John Apostolakis, 10.03.1997 << 36 // History:
48 // ------------------------------------------- << 37 // - Created: John Apostolakis, 10.03.1997
>> 38
49 #ifndef G4FIELD_HH 39 #ifndef G4FIELD_HH
50 #define G4FIELD_HH 40 #define G4FIELD_HH
51 41
52 #include "G4Types.hh" <<
53 #include "globals.hh" <<
54 <<
55 class G4Field 42 class G4Field
56 { 43 {
57 public: // with description 44 public: // with description
58 45
59 G4Field( G4bool gravityOn = false); << 46 virtual void GetFieldValue( const double Point[4],
60 G4Field( const G4Field& ); << 47 double *Bfield ) const = 0;
61 virtual ~G4Field(); << 48 G4Field(){;}
62 G4Field& operator = (const G4Field& p); << 49 virtual ~G4Field(){;}
63 << 50
64 virtual void GetFieldValue( const G4doub << 51 // A field signature function that can be used to insure
65 G4doub << 52 // that the Equation of motion object and the G4Field object
66 // Given the position time vector 'Poin << 53 // have the same "field signature"?
67 // return the value of the field in the << 54 };
68 // Notes: << 55
69 // 1) The 'Point' vector has the foll << 56
70 // Point[0] is x ( position, << 57 #endif /* G4FIELD_HH */
71 // Point[1] is y << 58
72 // Point[2] is z <<
73 // Point[3] is t ( time, in <<
74 // 2) The convention for the componen <<
75 // array 'fieldArr' are determined <<
76 // See for example the class G4Ele <<
77 <<
78 virtual G4bool DoesFieldChangeEnergy() c <<
79 // Each type/class of field should res <<
80 // For example: <<
81 // - an electric field should re <<
82 // - a pure magnetic field should re <<
83 <<
84 inline G4bool IsGravityActive() const; <<
85 // Does this field include gravity? <<
86 <<
87 inline void SetGravityActive( G4bool OnO <<
88 <<
89 virtual G4Field* Clone() const; <<
90 // Implements cloning, needed by multi <<
91 59
92 static constexpr G4int MAX_NUMBER_OF_COM <<
93 60
94 private: <<
95 61
96 G4bool fGravityActive = false; <<
97 }; <<
98 62
99 // Inline methods ... <<
100 63
101 inline G4bool G4Field::IsGravityActive() const <<
102 { <<
103 return fGravityActive; <<
104 } <<
105 64
106 inline void G4Field::SetGravityActive( G4bool <<
107 { <<
108 fGravityActive = OnOffFlag; <<
109 } <<
110 <<
111 #endif <<
112 65