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25 //
26 /// \file eventgenerator/HepMC/HepMCEx01/include/HepMCG4Interface.hh
27 /// \brief Definition of the HepMCG4Interface class
28 //
29 //
30
31 #ifndef HEPMC_G4_INTERFACE_H
32 #define HEPMC_G4_INTERFACE_H
33
34 #include "HepMC/GenEvent.h"
35
36 #include "G4VPrimaryGenerator.hh"
37
38 /// A base class for primary generation via HepMC object.
39 /// This class is derived from G4VPrimaryGenerator.
40
41 class HepMCG4Interface : public G4VPrimaryGenerator
42 {
43 protected:
44 // Note that the life of HepMC event object must be handled by users.
45 // In the default implementation, a current HepMC event will be
46 // deleted at GeneratePrimaryVertex() in the next event.
47 HepMC::GenEvent* hepmcEvent; // (care for single event case only)
48
49 // We have to take care for the position of primaries because
50 // primary vertices outside the world voulme give rise to G4Execption.
51 // If the default implementation is not adequate, an alternative
52 // can be implemented in your own class.
53 virtual G4bool CheckVertexInsideWorld(const G4ThreeVector& pos) const;
54
55 // service method for conversion from HepMC::GenEvent to G4Event
56 void HepMC2G4(const HepMC::GenEvent* hepmcevt, G4Event* g4event);
57
58 // Implement this method in his/her own concrete class.
59 // An empty event will be created in default.
60 virtual HepMC::GenEvent* GenerateHepMCEvent();
61
62 public:
63 HepMCG4Interface();
64 virtual ~HepMCG4Interface();
65
66 // set/get methods
67 HepMC::GenEvent* GetHepMCGenEvent() const;
68
69 // The default behavior is that a single HepMC event generated by
70 // GenerateHepMCEvent() will be converted to G4Event through HepMC2G4().
71 virtual void GeneratePrimaryVertex(G4Event* anEvent);
72 };
73
74 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
75 inline HepMC::GenEvent* HepMCG4Interface::GetHepMCGenEvent() const
76 {
77 return hepmcEvent;
78 }
79
80 #endif
81