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//
// Class Description:
// G4QuasiOpticalPhoton is a non-physical particle definition designed to
// encapsulate the conditions for generating a burst of optical photons in
// processes such as scintillation or Cerenkov radiation. Its role is to serve
// as a compact carrier of optical emission metadata—stored via
// G4VUserTrackInformation—including the number of photons to generate, parent
// particle charge, information about the step and track state, and associated
// material properties. This enables deferred or offloaded optical photon
// production and propagation, particularly for hybrid or heterogeneous
// workflows. The term *quasi* (suggested by Daren Sawkey) refers to the
// particle’s representation as a collective distribution of optical photons-
// a synthetic construct used to manage secondary particle generation in the
// Geant4 tracking and optical processes.
#ifndef G4QuasiOpticalPhoton_h
#define G4QuasiOpticalPhoton_h 1

#include "G4ParticleDefinition.hh"

class G4QuasiOpticalPhoton : public G4ParticleDefinition
{
  public:
    static G4QuasiOpticalPhoton* Definition();
    static G4QuasiOpticalPhoton* QuasiOpticalPhotonDefinition();
    static G4QuasiOpticalPhoton* QuasiOpticalPhoton();

  private:
    G4QuasiOpticalPhoton() {}
    ~G4QuasiOpticalPhoton() override = default;

    static G4QuasiOpticalPhoton* theInstance;
};

#endif