GenEventRotator.h

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// Dear emacs, this is -*- C++ -*-
 
/*
  Copyright (C) 2002-2022 CERN for the benefit of the ATLAS collaboration
*/
 
#ifndef ISF_HEPMC_GENEVENTROTATOR_H
#define ISF_HEPMC_GENEVENTROTATOR_H 1
 
// Base class headers
#include "AthenaBaseComps/AthAlgTool.h"
#include "HepMC_Interfaces/IGenEventManipulator.h"
// Gaudi headers
#include "GaudiKernel/ServiceHandle.h"
// CLHEP headers
#include "CLHEP/Geometry/Transform3D.h"
#include "CLHEP/Vector/LorentzRotation.h"
 
#include "AtlasHepMC/GenParticle.h"
 
namespace Simulation {

  class GenEventRotator : public extends<AthAlgTool, IGenEventManipulator>
  {
 
  public:
    GenEventRotator( const std::string& t, const std::string& n, const IInterface* p );

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

    StatusCode manipulate(HepMC::GenEvent& ge, const EventContext& ctx) const override final;
  private:
    StatusCode initializeGenEvent(CLHEP::HepLorentzRotation& transform, const EventContext& ctx) const;
    void rotateParticle(HepMC::GenParticlePtr& p, const CLHEP::HepLorentzRotation& transform) const;
 
    Gaudi::Property<double> m_xangle{this, "xAngle", 0.0, "rotation about x-axis"};
    Gaudi::Property<double> m_yangle{this, "yAngle", 0.0, "rotation about y-axis"};
    Gaudi::Property<double> m_zangle{this, "zAngle", 0.0, "rotation about z-axis"};
  };
 
}
 
#endif //> !ISF_HEPMC_GENEVENTROTATOR_H