LongBeamspotVertexPositioner.h

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/*
  Copyright (C) 2002-2022 CERN for the benefit of the ATLAS collaboration
*/
 
#ifndef BEAMEFFECTS_LONGBEAMSPOTVERTEXPOSITIONER_H
#define BEAMEFFECTS_LONGBEAMSPOTVERTEXPOSITIONER_H 1
 
// STL includes
#include <string>
#include <utility>
#include <vector>
#include <map>
// FrameWork includes
#include "GaudiKernel/ServiceHandle.h"
#include "AthenaBaseComps/AthAlgTool.h"
#include "AthenaKernel/IAthRNGSvc.h"
#include "CxxUtils/checker_macros.h"
#include "HepMC_Interfaces/ILorentzVectorGenerator.h"
#include "BeamSpotConditionsData/BeamSpotData.h"
namespace ATHRNG {
  class RNGWrapper;
}
namespace CLHEP {
  class HepRandomEngine;
}
 
namespace Simulation {

  class LongBeamspotVertexPositioner : public extends<AthAlgTool, ILorentzVectorGenerator> {
 
    public:

      LongBeamspotVertexPositioner( const std::string& t, const std::string& n,
                                    const IInterface* p );

      virtual ~LongBeamspotVertexPositioner() = default;

      StatusCode initialize() override final;
      StatusCode finalize() override final;

      CLHEP::HepLorentzVector *generate(const EventContext& ctx) const override final;
 
    private:
 
      inline double heaviside(double val) const {return (val >= 0.0) ? 1.0 : 0.0;};
      double getZpos(CLHEP::HepRandomEngine*) const;
      double beamspotFunction(double z) const;
      Gaudi::Property<double> m_L{this, "LParameter", 150.}; 
      SG::ReadCondHandleKey<InDet::BeamSpotData> m_beamSpotKey { this, "BeamSpotKey", "BeamSpotData", "SG key for beam spot" };
      ServiceHandle<IAthRNGSvc>   m_rndGenSvc{this, "RandomSvc", "AthRNGSvc"};
      ATHRNG::RNGWrapper*             m_randomEngine ATLAS_THREAD_SAFE{};  
 
      Gaudi::Property<std::string>    m_randomEngineName{this, "RandomStream", "VERTEX"};         
      Gaudi::Property<bool>             m_timeSmearing{this, "SimpleTimeSmearing", false};             
 
  };
 
}
 
#endif //> !BEAMEFFECTS_LONGBEAMSPOTVERTEXPOSITIONER_H