Import Geant4 11.4.0 source tree

2025-12-05 08:54:02 +01:00
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+//
+// ********************************************************************
+// * License and Disclaimer                                           *
+// *                                                                  *
+// * The  Geant4 software  is  copyright of the Copyright Holders  of *
+// * the Geant4 Collaboration.  It is provided  under  the terms  and *
+// * conditions of the Geant4 Software License,  included in the file *
+// * LICENSE and available at  http://cern.ch/geant4/license .  These *
+// * include a list of copyright holders.                             *
+// *                                                                  *
+// * Neither the authors of this software system, nor their employing *
+// * institutes,nor the agencies providing financial support for this *
+// * work  make  any representation or  warranty, express or implied, *
+// * regarding  this  software system or assume any liability for its *
+// * use.  Please see the license in the file  LICENSE  and URL above *
+// * for the full disclaimer and the limitation of liability.         *
+// *                                                                  *
+// * This  code  implementation is the result of  the  scientific and *
+// * technical work of the GEANT4 collaboration.                      *
+// * By using,  copying,  modifying or  distributing the software (or *
+// * any work based  on the software)  you  agree  to acknowledge its *
+// * use  in  resulting  scientific  publications,  and indicate your *
+// * acceptance of all terms of the Geant4 Software license.          *
+// ********************************************************************
+//
+// 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