SimHitHandle_TrackRecord.h

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/*
  Copyright (C) 2002-2022 CERN for the benefit of the ATLAS collaboration
*/
 
 
//                                                            //
//  Header file for class SimHitHandle_TrackRecord            //
//                                                            //
//  Description: Handle for Track Records                     //
//                                                            //
//  Author: Thomas H. Kittelmann (Thomas.Kittelmann@cern.ch)  //
//  Initial version: May 2008                                 //
//                                                            //
 
#ifndef SIMHITHANDLE_TRACKRECORD_H
#define SIMHITHANDLE_TRACKRECORD_H
 
#include "VP1TrackSystems/SimHitHandleBase.h"
#include "TrackRecord/TrackRecord.h"
#include "GeoPrimitives/CLHEPtoEigenConverter.h"
 
 
class TrackRecord;
class HepMcParticleLink;
 
class SimHitHandle_TrackRecord : public SimHitHandleBase {
public:
 
  SimHitHandle_TrackRecord(const TrackRecord*);
  virtual ~SimHitHandle_TrackRecord();
 
  virtual QString type() const override { return "TrackRecord"; };
 
  virtual Amg::Vector3D momentumDirection() const override;
  virtual double actualMomentum() const override;
  virtual Amg::Vector3D posStart() const override;
  virtual Amg::Vector3D posEnd() const override;//We fake this one as a point 0.1mm away from posStart, in the momentumDirection.
  virtual double hitTime() const override;
  virtual int actualPDGCodeFromSimHit() const override;
  virtual const HepMcParticleLink& particleLink() const override;
  virtual Trk::TrackParameters * createTrackParameters() const override;
 
private:
 
  TrackRecord* m_trkrecord;//We keep this as non-const pointers due to wrong constness in TrackRecord methods!!
  double m_mom;
  Amg::Vector3D m_momdir;
  const HepMcParticleLink* m_link;
};
 
//  Inlines  //
 
inline Amg::Vector3D SimHitHandle_TrackRecord::momentumDirection() const
{
  return m_momdir;
}
 
inline double SimHitHandle_TrackRecord::actualMomentum() const
{
  return m_mom;
}
 
inline Amg::Vector3D SimHitHandle_TrackRecord::posStart() const
{
  return Amg::Hep3VectorToEigen(m_trkrecord->GetPosition());
}
 
inline Amg::Vector3D SimHitHandle_TrackRecord::posEnd() const
{
  return posStart() + 0.1*CLHEP::mm*(momentumDirection());//faking it... but shouldn't matter.
}
 
inline double SimHitHandle_TrackRecord::hitTime() const
{
  return m_trkrecord->GetTime();
}
 
inline int SimHitHandle_TrackRecord::actualPDGCodeFromSimHit() const
{
  return m_trkrecord->GetPDGCode();
}
 
#endif