StraightPatRec.h

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/*
  Copyright (C) 2002-2021 CERN for the benefit of the ATLAS collaboration
*/
#ifndef MDTCALIBFITTERS_StraightPatRecH
#define MDTCALIBFITTERS_StraightPatRecH
 
 
#include <vector>
 
#include "CxxUtils/checker_macros.h"
#include "GeoPrimitives/GeoPrimitives.h"
#include "MdtCalibFitters/DCSLFitter.h"
#include "MdtCalibFitters/MTStraightLine.h"
#include "MdtCalibInterfaces/IMdtPatRecFitter.h"
#include "MuonCalibEventBase/MuonCalibSegment.h"
 
namespace MuonCalib {
 
    class StraightPatRec : public IMdtPatRecFitter {
    public:
        // Constructors //
        StraightPatRec() { init(); }
 
        StraightPatRec(const double &r_road_width) { init(r_road_width); }
 
        // Methods //
        // get-methods //
        double roadWidth() const;
 
        // set-method //
        void setRoadWidth(const double &r_road_width);
        void setTimeOut(const double &time_out);
 
        void setFixSelection(bool fix_sel);
 
        // methods required by the base class "IMdtSegmentFitter" //
        bool fit(MuonCalibSegment &r_segment) const;
        bool fit(MuonCalibSegment &r_segment, HitSelection r_selection) const;
        bool fit(MuonCalibSegment &r_segment, HitSelection r_selection, MTStraightLine &line_track) const;
 
        void printLevel(int) {}
 
        bool fitCallByReference(MuonCalibSegment &r_segment, HitSelection &r_selection, MTStraightLine &line_track) const;
        bool fitCallByReference(MuonCalibSegment &r_segment, HitSelection &r_selection) const;
 
    private:
        // internal co-ordinate definition //
        //                      x3
        //                      ^
        //     o o o o o o      |
        //  ... o o o o o ...   o--> x2
        //     o o o o o o     x1
        //
 
        bool m_fix_selection;
 
        // parameters for the adjustment of the track reconstruction //
        double m_r_max;       // maximum radius
        double m_road_width;  // road width for pattern recognition
        double m_time_out;    // time-out for track finding
 
        // initialization methods //
        void init();
        // default initialization:  road width = 0.5 CLHEP::mm
        void init(const double &r_road_width);
        // initialization with user-defined road width
 
        // auxiliary methods //
        MTStraightLine tangent(const Amg::Vector3D &r_w1, const double &r_r1, const double &r_sigma12, const Amg::Vector3D &r_w2,
                               const double &r_r2, const double &r_sigma22, const int &r_case) const;
        // method for the calculation of tangents with errors;
        // r_w1: wire position for the first hit,
        // r_r1: drift radius of the first hit,
        // r_sigma12: sigma(r_r1)^2,
        // r_w2: wire position for the second hit,
        // r_r2: drift radius of the second hit,
        // r_sigma22: sigma(r_r2)^2,
        // r_case = 1, 2, 3, 4: select one of the four cases of a tangent
        MTStraightLine fitCandidate(MuonCalibSegment &r_segment, const std::vector<unsigned int> &r_selection,
                                    const MTStraightLine &cand_line) const;
 
        // refit the candidate "cand_line" using the hits specified by
        // the r_selection and index vectors
    };
 
}  // namespace MuonCalib
 
#endif