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1#ifndef AliHMPIDRecon_h
2#define AliHMPIDRecon_h
3
4/* Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved. *
5 * See cxx source for full Copyright notice */
6
7//////////////////////////////////////////////////////////////////////////
8// //
9// AliHMPIDRecon //
10// //
11// HMPID class to perfom pattern recognition based on Hough transfrom //
12// //
13//////////////////////////////////////////////////////////////////////////
14
15
16#include <TTask.h> //base class
17#include <TVector3.h> //fields
18
19class TClonesArray; //CkovAngle()
20class AliESDtrack; //CkovAngle()
21class AliHMPIDParam;//general pourpose
22
23class AliHMPIDRecon : public TTask
24{
25public :
26 AliHMPIDRecon();
27 virtual ~AliHMPIDRecon() {;} //dtor
28
29 void InitVars (Int_t n); //init space for variables
30 void DeleteVars ()const; //delete variables
31 void CkovAngle (AliESDtrack *pTrk,TClonesArray *pCluLst,Int_t index,Double_t nmean,Float_t xRa,Float_t yRa );//reconstructed Theta Cerenkov
32 Bool_t FindPhotCkov (Double_t cluX,Double_t cluY,Double_t &thetaCer,Double_t &phiCer ); //find ckov angle for single photon candidate
33 Double_t FindRingCkov (Int_t iNclus ); //best ckov for ring formed by found photon candidates
34 void FindRingGeom (Double_t ckovAng,Int_t level=1 ); //estimated area of ring in cm^2 and portion accepted by geometry
35 TVector2 IntWithEdge (TVector2 p1,TVector2 p2 )const;//find intercection between plane and lines of 2 thetaC
36 Int_t FlagPhot (Double_t ckov,TClonesArray *pCluLst,AliESDtrack *pTrk ); //is photon ckov near most probable track ckov
37 Double_t HoughResponse( ); //most probable track ckov angle
38 void Propagate (const TVector3 dir, TVector3 &pos,Double_t z )const;//propagate photon alogn the line
39 void Refract ( TVector3 &dir, Double_t n1, Double_t n2)const;//refract photon on the boundary
40 TVector2 TracePhot (Double_t ckovTh,Double_t ckovPh )const;//trace photon created by track to PC
41 TVector2 TraceForward (TVector3 dirCkov )const;//tracing forward a photon from (x,y) to PC
42 void Lors2Trs (TVector3 dirCkov,Double_t &thetaCer,Double_t &phiCer )const;//LORS to TRS
43 void Trs2Lors (TVector3 dirCkov,Double_t &thetaCer,Double_t &phiCer )const;//TRS to LORS
44 TVector2 GetMip ( )const
45 {return fMipPos;} //mip coordinates
46 Double_t GetRingArea ( )const
47 {return fRingArea;} //area of the current ring in cm^2
48 Double_t GetRingAcc ( )const
49 {return fRingAcc;} //portion of the ring ([0,1]) accepted by geometry.To scale n. of photons
50 Double_t FindRingExt (Double_t ckov,Int_t ch,Double_t xPc,Double_t yPc,Double_t thRa,Double_t phRa);//find ring acceptance by external parameters
51 void SetTrack (Double_t xRad,Double_t yRad,Double_t theta,Double_t phi )
52 {fTrkDir.SetMagThetaPhi(1,theta,phi); fTrkPos.Set(xRad,yRad);} //set track parameter at RAD
53 void SetImpPC (Double_t xPc,Double_t yPc )
54 {fPc.Set(xPc,yPc);} //set track impact to PC
55 void SetMip (Double_t xmip,Double_t ymip )
56 {fMipPos.Set(xmip,ymip);} //set track impact to PC
57 enum ETrackingFlags {kNotPerformed=-20,kMipDistCut=-9,kMipQdcCut=-5,kNoPhotAccept=-11,kNoRad = -22};
58//
59protected:
60 Int_t fPhotCnt; // counter of photons candidate
61 Int_t *fPhotFlag; // flags of photon candidates
62 Int_t *fPhotClusIndex; // cluster index of photon candidates
63 Double_t *fPhotCkov; // Ckov angles of photon candidates, [rad]
64 Double_t *fPhotPhi; // phis of photons candidates, [rad]
65 Double_t *fPhotWei; // weigths of photon candidates
66 Double_t fCkovSigma2; // sigma2 of the reconstructed ring
67
68 Bool_t fIsWEIGHT; // flag to consider weight procedure
69 Float_t fDTheta; // Step for sliding window
70 Float_t fWindowWidth; // Hough width of sliding window
71
72 Double_t fRingArea; // area of a given ring
73 Double_t fRingAcc; // fraction of the ring accepted by geometry
74 TVector3 fTrkDir; // track direction in LORS at RAD
75 TVector2 fTrkPos; // track positon in LORS at RAD
76 TVector2 fMipPos; // mip positon for a given track
77 TVector2 fPc; // track position at PC
78
79 AliHMPIDParam *fParam; // Pointer to AliHMPIDParam
80
81private:
82 AliHMPIDRecon(const AliHMPIDRecon& r); //dummy copy constructor
83 AliHMPIDRecon &operator=(const AliHMPIDRecon& r); //dummy assignment operator
84//
85 ClassDef(AliHMPIDRecon,2)
86};
87
88#endif // #ifdef AliHMPIDRecon_cxx
89