HepMCEx01/include/HepMCG4Interface.hh

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0026 /// \file eventgenerator/HepMC/HepMCEx01/include/HepMCG4Interface.hh
0027 /// \brief Definition of the HepMCG4Interface class
0028 //
0029 //
0030
0031 #ifndef HEPMC_G4_INTERFACE_H
0032 #define HEPMC_G4_INTERFACE_H
0033
0034 #include "HepMC/GenEvent.h"
0035
0036 #include "G4VPrimaryGenerator.hh"
0037
0038 /// A base class for primary generation via HepMC object.
0039 /// This class is derived from G4VPrimaryGenerator.
0040
0041 class HepMCG4Interface : public G4VPrimaryGenerator
0042 {
0043   protected:
0044     // Note that the life of HepMC event object must be handled by users.
0045     // In the default implementation, a current HepMC event will be
0046     // deleted at GeneratePrimaryVertex() in the next event.
0047     HepMC::GenEvent* hepmcEvent;  // (care for single event case only)
0048
0049     // We  have to take care for the position of primaries because
0050     // primary vertices outside the world voulme give rise to G4Execption.
0051     // If the default implementation is not adequate, an alternative
0052     // can be implemented in your own class.
0053     virtual G4bool CheckVertexInsideWorld(const G4ThreeVector& pos) const;
0054
0055     // service method for conversion from HepMC::GenEvent to G4Event
0056     void HepMC2G4(const HepMC::GenEvent* hepmcevt, G4Event* g4event);
0057
0058     // Implement this method in his/her own concrete class.
0059     // An empty event will be created in default.
0060     virtual HepMC::GenEvent* GenerateHepMCEvent();
0061
0062   public:
0063     HepMCG4Interface();
0064     virtual ~HepMCG4Interface();
0065
0066     // set/get methods
0067     HepMC::GenEvent* GetHepMCGenEvent() const;
0068
0069     // The default behavior is that a single HepMC event generated by
0070     // GenerateHepMCEvent() will be converted to G4Event through HepMC2G4().
0071     virtual void GeneratePrimaryVertex(G4Event* anEvent);
0072 };
0073
0074 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
0075 inline HepMC::GenEvent* HepMCG4Interface::GetHepMCGenEvent() const
0076 {
0077   return hepmcEvent;
0078 }
0079
0080 #endif