PXDStateTruthVarSet.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 <tracking/trackFindingCDC/varsets/VarSet.h>
#include <tracking/trackFindingCDC/varsets/VarNames.h>
 
#include <framework/dataobjects/EventMetaData.h>
#include <framework/datastore/StoreObjPtr.h>
 
#include <tracking/ckf/pxd/filters/states/BasePXDStateFilter.h>
#include <tracking/ckf/pxd/utilities/PXDMCUtil.h>
 
namespace Belle2 {
  constexpr
  static char const* const pxdStateTruthVarNames[] = {
    "truth",
    "truth_position_x",
    "truth_position_y",
    "truth_position_z",
    "truth_momentum_x",
    "truth_momentum_y",
    "truth_momentum_z",
    "truth_event_id",
    "truth_seed_number"
  };

  class PXDStateTruthVarNames : public TrackFindingCDC::VarNames<BasePXDStateFilter::Object> {
 
  public:
    static const size_t nVars = TrackFindingCDC::size(pxdStateTruthVarNames);

    constexpr
    static char const* getName(int iName)
    {
      return pxdStateTruthVarNames[iName];
    }
  };

  class PXDStateTruthVarSet : public TrackFindingCDC::VarSet<PXDStateTruthVarNames> {
 
  public:
    virtual bool extract(const BasePXDStateFilter::Object* result) override;

    void exposeParameters(ModuleParamList* moduleParamList, const std::string& prefix) override;
 
  private:
    StoreObjPtr<EventMetaData> m_eventMetaData;

    MCUtil m_mcUtil;

    bool m_UseFractionOfBackground = false;

    double m_BackgroundFraction = 0.001;
  };

}