Geant4 Cross Reference |
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These * 9 // * include a list of copyright holders. 9 // * include a list of copyright holders. * 10 // * 10 // * * 11 // * Neither the authors of this software syst 11 // * Neither the authors of this software system, nor their employing * 12 // * institutes,nor the agencies providing fin 12 // * institutes,nor the agencies providing financial support for this * 13 // * work make any representation or warran 13 // * work make any representation or warranty, express or implied, * 14 // * regarding this software system or assum 14 // * regarding this software system or assume any liability for its * 15 // * use. Please see the license in the file 15 // * use. Please see the license in the file LICENSE and URL above * 16 // * for the full disclaimer and the limitatio 16 // * for the full disclaimer and the limitation of liability. * 17 // * 17 // * * 18 // * This code implementation is the result 18 // * This code implementation is the result of the scientific and * 19 // * technical work of the GEANT4 collaboratio 19 // * technical work of the GEANT4 collaboration. * 20 // * By using, copying, modifying or distri 20 // * By using, copying, modifying or distributing the software (or * 21 // * any work based on the software) you ag 21 // * any work based on the software) you agree to acknowledge its * 22 // * use in resulting scientific publicati 22 // * use in resulting scientific publications, and indicate your * 23 // * acceptance of all terms of the Geant4 Sof 23 // * acceptance of all terms of the Geant4 Software license. * 24 // ******************************************* 24 // ******************************************************************** 25 // 25 // 26 // G4Field << 26 // >> 27 // $Id: G4Field.hh 97486 2016-06-03 10:45:04Z gcosmo $ >> 28 // >> 29 // >> 30 // class G4Field 27 // 31 // 28 // Class description: 32 // Class description: 29 // 33 // 30 // Abstract class for any kind of Field. 34 // Abstract class for any kind of Field. 31 // It allows any kind of field (vector, scalar 35 // It allows any kind of field (vector, scalar, tensor and any set of them) 32 // to be defined by implementing the inquiry f 36 // to be defined by implementing the inquiry function interface. 33 // 37 // 34 // The key method is GetFieldValue( const do 38 // The key method is GetFieldValue( const double Point[4], 35 // ************* do 39 // ************* double *fieldArr ) 36 // Given an input position/time vector 'Point' 40 // Given an input position/time vector 'Point', 37 // this method must return the value of the fi 41 // this method must return the value of the field in "fieldArr". 38 // 42 // 39 // A field must also specify whether it change 43 // A field must also specify whether it changes a track's energy: 40 // DoesFieldChangeEnergy() 44 // DoesFieldChangeEnergy() 41 // ********************* 45 // ********************* 42 // A field must co-work with a corresponding E 46 // A field must co-work with a corresponding Equation of Motion, to 43 // enable the integration of a particle's posi 47 // enable the integration of a particle's position, momentum and, optionally, 44 // spin. For this a field and its equation of 48 // spin. For this a field and its equation of motion must follow the 45 // same convention for the order of field comp 49 // same convention for the order of field components in the array "fieldArr" 46 << 47 // Created: John Apostolakis, 10.03.1997 << 48 // ------------------------------------------- 50 // ------------------------------------------------------------------- >> 51 // History: >> 52 // - Created: John Apostolakis, 10.03.1997 >> 53 // - Modified: >> 54 // V. Grichine 8 Nov 2001: Extended "Point" arg to [4] array to add time >> 55 // J. Apostolakis 5 Nov 2003: Added virtual method DoesFieldChangeEnergy() >> 56 // J. Apostolakis 31 Aug 2004: Information on convention for components >> 57 // ------------------------------------------------------------------- >> 58 49 #ifndef G4FIELD_HH 59 #ifndef G4FIELD_HH 50 #define G4FIELD_HH 60 #define G4FIELD_HH 51 61 52 #include "G4Types.hh" 62 #include "G4Types.hh" 53 #include "globals.hh" 63 #include "globals.hh" 54 64 55 class G4Field 65 class G4Field 56 { 66 { 57 public: // with description 67 public: // with description 58 68 59 G4Field( G4bool gravityOn = false); << 69 virtual void GetFieldValue( const double Point[4], 60 G4Field( const G4Field& ); << 70 double *fieldArr ) const = 0; 61 virtual ~G4Field(); << 62 G4Field& operator = (const G4Field& p); << 63 << 64 virtual void GetFieldValue( const G4doub << 65 G4doub << 66 // Given the position time vector 'Poin 71 // Given the position time vector 'Point', 67 // return the value of the field in the 72 // return the value of the field in the array fieldArr. 68 // Notes: 73 // Notes: 69 // 1) The 'Point' vector has the foll 74 // 1) The 'Point' vector has the following structure: 70 // Point[0] is x ( position, 75 // Point[0] is x ( position, in Geant4 units ) 71 // Point[1] is y 76 // Point[1] is y 72 // Point[2] is z 77 // Point[2] is z 73 // Point[3] is t ( time, in 78 // Point[3] is t ( time, in Geant4 units ) 74 // 2) The convention for the componen 79 // 2) The convention for the components of the field 75 // array 'fieldArr' are determined 80 // array 'fieldArr' are determined by the type of field. 76 // See for example the class G4Ele 81 // See for example the class G4ElectroMagneticField. 77 82 78 virtual G4bool DoesFieldChangeEnergy() c << 83 G4Field( G4bool gravityOn= false); 79 // Each type/class of field should res << 84 G4Field( const G4Field & ); 80 // For example: << 85 virtual ~G4Field(); 81 // - an electric field should re << 86 G4Field& operator = (const G4Field &p); 82 // - a pure magnetic field should re << 83 87 84 inline G4bool IsGravityActive() const; << 88 // A field signature function that can be used to insure 85 // Does this field include gravity? << 89 // that the Equation of motion object and the G4Field object >> 90 // have the same "field signature"? >> 91 >> 92 virtual G4bool DoesFieldChangeEnergy() const= 0 ; >> 93 // Each type/class of field should respond this accordingly >> 94 // For example: >> 95 // - an electric field should return "true" >> 96 // - a pure magnetic field should return "false" 86 97 >> 98 G4bool IsGravityActive() const { return fGravityActive;} >> 99 // Does this field include gravity? 87 inline void SetGravityActive( G4bool OnO 100 inline void SetGravityActive( G4bool OnOffFlag ); 88 101 89 virtual G4Field* Clone() const; 102 virtual G4Field* Clone() const; 90 // Implements cloning, needed by multi << 103 // Implements cloning, needed by G4 MT 91 << 92 static constexpr G4int MAX_NUMBER_OF_COM << 93 104 94 private: 105 private: 95 106 96 G4bool fGravityActive = false; << 107 G4bool fGravityActive; 97 }; 108 }; 98 109 99 // Inline methods ... << 110 inline void G4Field::SetGravityActive( G4bool OnOffFlag ) 100 << 101 inline G4bool G4Field::IsGravityActive() const << 102 { << 103 return fGravityActive; << 104 } << 105 << 106 inline void G4Field::SetGravityActive( G4bool << 107 { 111 { 108 fGravityActive = OnOffFlag; << 112 fGravityActive= OnOffFlag; 109 } << 113 } 110 << 114 #endif /* G4FIELD_HH */ 111 #endif << 112 115