MCParticleGenerator.h

/**************************************************************************
 * basf2 (Belle II Analysis Software Framework)                           *
 * Author: The Belle II Collaboration                                     *
 *                                                                        *
 * See git log for contributors and copyright holders.                    *
 * This file is licensed under LGPL-3.0, see LICENSE.md.                  *
 **************************************************************************/
 
#pragma once
 
#include <mdst/dataobjects/MCParticleGraph.h>
 
#include <G4VPrimaryGenerator.hh>
#include <G4PrimaryParticle.hh>
#include <G4Event.hh>
 
#include <string>
 
class G4VSolid;
 
namespace Belle2 {
 
  namespace Simulation {

    class MCParticleGenerator: public G4VPrimaryGenerator {
 
    public:

      MCParticleGenerator(const std::string& mcCollectionName,
                          MCParticleGraph& mcParticleGraph);

      virtual ~MCParticleGenerator();

      virtual void GeneratePrimaryVertex(G4Event* event);
 
 
    protected:
      G4VSolid* m_topSolid{nullptr};
      std::string m_mcCollectionName;     
      MCParticleGraph& m_mcParticleGraph; 

      void addParticle(const MCParticle& mcParticle,
                       G4Event* event,
                       G4PrimaryParticle* lastG4Mother,
                       int motherIndex,
                       bool useTime);

      G4PrimaryVertex* determineVertex(const MCParticleGraph::GraphParticle& p, double& productionTimeShift);
    };
 
  } //end of Simulation namespace

} //end of Belle2 namespace