G4HEPEvtInterface.hh

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//
// G4HEPEvtInterface
//
// Class description:
//
// This is a concrete class of G4VPrimaryGenerator.
// It reads an ASCII file which contains particles generated by a
// physics generator which supports a /HEPEVT/ common block.
// 
// The format of ASCII file must be equivalent to the following sample
// Fortran code:
//
//***********************************************************
//      SUBROUTINE HEP2G4
//*
//* Output /HEPEVT/ event structure to G4HEPEvtInterface
//*
//***********************************************************
//      PARAMETER (NMXHEP=2000)
//      COMMON/HEPEVT/NEVHEP,NHEP,ISTHEP(NMXHEP),IDHEP(NMXHEP),
//     >JMOHEP(2,NMXHEP),JDAHEP(2,NMXHEP),PHEP(5,NMXHEP),VHEP(4,NMXHEP)
//      DOUBLE PRECISION PHEP,VHEP
//*
//      WRITE(6,*) NHEP
//      DO IHEP=1,NHEP
//       WRITE(6,10) 
//     >  ISTHEP(IHEP),IDHEP(IHEP),JDAHEP(1,IHEP),JDAHEP(2,IHEP),
//     >  PHEP(1,IHEP),PHEP(2,IHEP),PHEP(3,IHEP),PHEP(5,IHEP)
//10    FORMAT(I4,I10,I5,I5,4(1X,D15.8))
//      ENDDO
//*
//      RETURN
//      END
//
// The position and time of the primary interaction must be set by the
// corresponding set methods of G4VPrimaryGenerator base class, otherwise
// zero will be set.
 
// Author: Makoto Asai, 1997
// --------------------------------------------------------------------
#ifndef G4HEPEvtInterface_hh
#define G4HEPEvtInterface_hh 1
 
#include <fstream>
#include <vector>
 
#include "globals.hh"
#include "G4VPrimaryGenerator.hh"
#include "G4HEPEvtParticle.hh"
 
class G4PrimaryVertex;
class G4Event;
 
class G4HEPEvtInterface : public G4VPrimaryGenerator
{
  public:
 
    explicit G4HEPEvtInterface(const char* evfile, G4int vl=0);
    // Constructor, "evfile" is the file name (with directory path).
  
    ~G4HEPEvtInterface() override = default;
    // Destructor
 
    void GeneratePrimaryVertex(G4Event* evt) override;
 
  private:
 
    G4int vLevel = 0;
    G4String fileName;
    std::ifstream inputFile;
    std::vector<G4HEPEvtParticle*> HPlist;
};
 
#endif