CbmRichCorrection.h

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/* Copyright (C) 2016 Justus-Liebig-Universitaet Giessen, Giessen
   SPDX-License-Identifier: GPL-3.0-only
   Authors: Jordan Bendarouach [committer] */
 
#ifndef CBMRICHCORRECTION_H
#define CBMRICHCORRECTION_H
 
 
#include "CbmHistManager.h"
#include "CbmRichPoint.h"
#include "CbmRichRecGeoPar.h"
#include "CbmRichRing.h"
#include "CbmRichRingFitterCOP.h"
#include "CbmRichRingFitterEllipseTau.h"
#include "CbmRichRingLight.h"
#include "FairTask.h"
#include "TGeoNavigator.h"
#include "TString.h"
 
#include <map>
#include <vector>
 
using namespace std;
 
class TClonesArray;
class TH1D;
class TH2D;
 
 
class CbmRichCorrection :
  public FairTask  //CbmRichProjectionProducerBase
{
 private:
  static const int kMAX_NOF_HITS = 100;  // Maximum number of hits in ring
 
 public:
  /*
         * Constructor.
         */
  CbmRichCorrection();
 
  /*
         * Destructor.
         */
  virtual ~CbmRichCorrection();
 
  virtual InitStatus Init();
 
  virtual void Exec(Option_t* option);
 
  virtual void Finish();
 
  /*
     * Histogram initialization for projection producer method.
     */
  void InitHistProjection();
 
  void ProjectionProducer();
 
  /*
     * Get pmt normal from 3 different points on the plane.
     */
  void GetPmtNormal(Int_t NofPMTPoints, vector<Double_t>& normalPMT, Double_t& normalCste);
 
  /*
     * Calculate mean sphere center coordinates from all the mirror tiles (to be used for the reconstruction step).
     */
  void GetMeanSphereCenter(TGeoNavigator* navi, vector<Double_t>& ptC);
 
  /*
     * Calculate intersection between incoming particle track (position given by ptR1 and direction by momR1) and sphere with center ptC (Cmean) and radius sphereRadius.
     */
  void GetMirrorIntersection(vector<Double_t>& ptM, vector<Double_t> ptR1, vector<Double_t> momR1, vector<Double_t> ptC,
                             Double_t sphereRadius);
 
  /*
     * Test to apply the misalignment information on the sphere center coordinates from an input file. The procedure is as follow: first translate the sphere
     * center (using opposite values of the mirror center). Then apply the inverse transformation matrix on the point, apply the rotation matrix, which accounts
     * for the correction. After that, apply the transformation matrix to the point and translate it back to its position (using the coordinates of the mirror
     * tile center).
     * The results haven't been conclusive so far. There seems to be a problem with the transformation matrix.
     */
  vector<Double_t> RotateSphereCenter(vector<Double_t> ptM, vector<Double_t> ptC, TGeoNavigator* navi);
 
  /*
     * Input matrix mat is inverted using the adjugate matrix (= transpose of the cofactor matrix) to give invMat. A test can be also run, to check that
     * mat*invMat = Id.
     */
  void InvertMatrix(Double_t mat[3][3], Double_t invMat[3][3], TGeoNavigator* navi);
 
  /*
     * From point M and point C uncorrected (coordinates of C = theoretical coordinates of the sphere center) calculates new point M on the mirror.
     * Indeed the fRichMirrorPoints->At(iMirr) gives the point on the rotated mirror and not on the ideally aligned mirror. Even though the correction
     * is minimal, this gives a position more likely to be on the aligned mirror (no misalignment info used).
     */
  void CalculateMirrorIntersection(vector<Double_t> ptM, vector<Double_t> ptCUnCorr, vector<Double_t>& ptMNew);
 
  /*
     * Calculate the normal of the considered mirror tile, using the sphere center position of the tile (ptC) and the local reflection point on the mirror (ptM) => normalMirr.
     * Then calculate point on sensitive plane from the reflected track extrapolated (ptR2 = reflection of ptR1, with reflection axis = normalMirr).
     * ptR2Center uses ptC for the calculations, whereas ptR2Mirr uses ptM.
     */
  void ComputeR2(vector<Double_t>& ptR2Center, vector<Double_t>& ptR2Mirr, vector<Double_t> ptM, vector<Double_t> ptC,
                 vector<Double_t> ptR1, TGeoNavigator* navi, TString s);
 
  /*
     * Calculate the intersection point (P) between the track and the PMT plane, as if the track had been reflected by the mirror tile.
     * ptPMirr is calculated using the mirror point (ptM) to define the line reflected by the mirror and towards the PMT plane.
     * ptPR2 is calculated using ptR2Mirr (the reflection of point R1 on the sensitive plane, using ptM for the calculations -> see ComputeR2 method).
     */
  void ComputeP(vector<Double_t>& ptPMirr, vector<Double_t>& ptPR2, vector<Double_t> normalPMT, vector<Double_t> ptM,
                vector<Double_t> ptR2Mirr, Double_t normalCste);
 
  /*
     * Function filling the diffX, diffY and distance histograms, from the outPos vector.
     */
  void FillHistProjection(TVector3 outPosIdeal, TVector3 outPosUnCorr, TVector3 outPos, Int_t NofGlobalTracks,
                          vector<Double_t> normalPMT, Double_t constantePMT);
 
  /*
     * Draw histograms projection producer method.
     */
  void DrawHistProjection();
 
  /*
     * Draw histograms from root file.
     */
  void DrawHistFromFile(TString fileName);
 
  /*
     * Set output directory for images.
     */
  void SetOutputDir(TString dir) { fOutputDir = dir; }
 
  /*
     * Set run title. It is also a part of the file name of image files.
     */
  void SetRunTitle(TString title) { fRunTitle = title; }
 
  /*
     * Set axis rotation title. It is also a part of the file name of image files.
     */
  void SetAxisRotTitle(TString title) { fAxisRotTitle = title; }
 
  /*
     * Set to TRUE if you want to draw histograms.
     */
  void SetDrawProjection(Bool_t b) { fDrawProjection = b; }
 
  void SetIsReconstruction(Bool_t b) { fIsReconstruction = b; }
 
  void SetNumbAxis(TString n) { fNumbAxis = n; }
 
  void SetTileName(TString t) { fTile = t; }
 
 
 private:
  TClonesArray* fRichHits;   // Array of RICH hits
  TClonesArray* fRichRings;  // Array of found RICH rings
  TClonesArray* fRichMirrorPoints;
  TClonesArray* fRichProjections;
  TClonesArray* fRichMCPoints;
  TClonesArray* fMCTracks;
  TClonesArray* fRichRingMatches;
  TClonesArray* fRichRefPlanePoints;
  TClonesArray* fRichPoints;
  TClonesArray* fGlobalTracks;
  CbmHistManager* fHM;
  //CbmRichRecGeoPar* fGP;
  vector<Float_t> fPhi;
 
  TString fNumbAxis;
  TString fTile;
  UInt_t fEventNum;  // Event counter
  Bool_t fDrawProjection;
  Bool_t fIsMeanCenter;
  Bool_t fIsReconstruction;
 
  TString fOutputDir;     // Output directory to store figures.
  TString fRunTitle;      // Title of the run.
  TString fAxisRotTitle;  // Rotation around which axis.
 
  CbmRichRingFitterCOP* fCopFit;
  CbmRichRingFitterEllipseTau* fTauFit;
 
  CbmRichCorrection(const CbmRichCorrection&);
  CbmRichCorrection operator=(const CbmRichCorrection&);
 
  ClassDef(CbmRichCorrection, 1);
};
 
#endif