| Geant4 Cross Reference |
1 //
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25 //
26 // G4VDiscreteProcess
27 //
28 // Class description:
29 //
30 // Abstract class which defines the public behavior of
31 // discrete physics interactions.
32
33 // Authors:
34 // - 2 December 1995, G.Cosmo - First implementation, based on object model
35 // - 18 December 1996, H.Kurashige - New Physics scheme
36 // --------------------------------------------------------------------
37 #ifndef G4VDiscreteProcess_hh
38 #define G4VDiscreteProcess_hh 1
39
40 #include "globals.hh"
41 #include "G4ios.hh"
42
43 #include "G4VProcess.hh"
44
45 class G4VDiscreteProcess : public G4VProcess
46 {
47 public:
48
49 G4VDiscreteProcess(const G4String& aName,
50 G4ProcessType aType = fNotDefined );
51 G4VDiscreteProcess(G4VDiscreteProcess&);
52
53 virtual ~G4VDiscreteProcess();
54
55 G4VDiscreteProcess& operator=(const G4VDiscreteProcess&) = delete;
56
57 virtual G4double PostStepGetPhysicalInteractionLength(
58 const G4Track& track,
59 G4double previousStepSize,
60 G4ForceCondition* condition
61 );
62
63 virtual G4VParticleChange* PostStepDoIt(
64 const G4Track& ,
65 const G4Step&
66 );
67
68 // No operation in AtRestDoIt and AlongStepDoIt
69 //
70 virtual G4double AlongStepGetPhysicalInteractionLength(
71 const G4Track&,
72 G4double ,
73 G4double ,
74 G4double& ,
75 G4GPILSelection*
76 ) { return -1.0; }
77
78 virtual G4double AtRestGetPhysicalInteractionLength(
79 const G4Track& ,
80 G4ForceCondition*
81 ) { return -1.0; }
82
83 // No operation in AtRestDoIt and AlongStepDoIt
84 //
85 virtual G4VParticleChange* AtRestDoIt(
86 const G4Track& ,
87 const G4Step&
88 ) { return nullptr; }
89
90 virtual G4VParticleChange* AlongStepDoIt(
91 const G4Track& ,
92 const G4Step&
93 ) { return nullptr; }
94
95 // cross section in the unit of inverse length as a
96 // function of kinetic energy
97 virtual G4double GetCrossSection(
98 const G4double,
99 const G4MaterialCutsCouple*
100 ) { return 0.0; }
101
102 // minimal energy for non-zero cross section
103 virtual G4double MinPrimaryEnergy(
104 const G4ParticleDefinition*,
105 const G4Material*
106 ) { return 0.0; }
107
108 protected:
109
110 virtual G4double GetMeanFreePath( const G4Track& aTrack,
111 G4double previousStepSize,
112 G4ForceCondition* condition ) = 0;
113 // Calculates from the macroscopic cross-section a mean
114 // free path, the value is returned in units of distance
115
116 private:
117
118 G4VDiscreteProcess();
119 // Hidden default constructor
120 };
121
122 #endif
123