HepMCEvent.h

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#ifndef SIMCORE_HEPMCEVENT_H_
#define SIMCORE_HEPMCEVENT_H_
 
// LDMX
#include "Framework/Exception/Exception.h"
#include "SimCore/HepMC/HepMCParticle.h"
 
// HepMC3
#include "HepMC3/GenEvent.h"
#include "HepMC3/GenVertex.h"
 
// Geant4
#include "globals.hh"
 
// STL
#include <iostream>
#include <memory>
#include <vector>
 
namespace simcore::hepmc {
 
class HepMCEvent {
 public:
  HepMCEvent(std::shared_ptr<HepMC3::GenEvent> event);
 
  virtual ~HepMCEvent() = default;
 
  int getNumParticles() const;
 
  double getEventWeight() const;
 
  const double* getVertex() const;
 
  double getVertexTime() const;
 
  const std::vector<std::unique_ptr<HepMCParticle>>& getParticles() const;
 
  std::shared_ptr<HepMC3::GenEvent> getGenEvent() const;
 
 private:
  std::shared_ptr<HepMC3::GenEvent> event_;
 
  mutable double vtx_[3];
 
  mutable double vtxt_{0.};
 
  mutable std::vector<std::unique_ptr<HepMCParticle>> particles_;
 
  mutable bool particles_extracted_{false};
 
  void extractParticles() const;
};
 
}  // namespace simcore::hepmc
 
#endif