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[u/mrichter/AliRoot.git] / HMPID / AliHMPIDRecon.h
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d3da6dc4 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;
20class AliHMPIDRecon : public TTask
21{
22public :
23 AliHMPIDRecon();
24 virtual ~AliHMPIDRecon() {}
25
26
27 Double_t CkovAngle (TClonesArray *pCluLst,Int_t &iNaccepted); //reconstructed Theta Cerenkov
28 Double_t CkovSigma2 ( )const{ return fCkovSigma2;} //track ckov angle error squared
29 Double_t FindPhotCkov (Double_t cluX,Double_t cluY ); //find ckov angle for single photon candidate
30 Double_t FindPhotPhi (Double_t cluX,Double_t cluY ); //find phi angle for single photon candidate
31 Double_t FindRingCkov (Int_t iNclus ); //best ckov for ring formed by found photon candidates
32 Double_t FindRingArea (Double_t ckov )const;//estimated area of ring in cm^2
33 Int_t FlagPhot (Double_t ckov ); //is photon ckov near most probable track ckov
34 Double_t HoughResponse( ); //most probable track ckov angle
35 void Propagate (const TVector3 &dir, TVector3 &pos,Double_t z )const;//propagate photon alogn the line
36 void Refract ( TVector3 &dir, Double_t n1, Double_t n2)const;//refract photon on the boundary
37 Double_t TracePhot (Double_t ckovTh,Double_t ckovPh,TVector2 &pos )const;//trace photon created by track to PC
38 void SetTrack (Double_t th,Double_t ph,Double_t x,Double_t y ){fTrkDir.SetMagThetaPhi(1,th,ph); fTrkPos.Set(x,y);}//set track
39 Double_t SigLoc (Double_t ckovTh,Double_t ckovPh,Double_t beta )const;//error due to cathode segmetation
40 Double_t SigGeom (Double_t ckovTh,Double_t ckovPh,Double_t beta )const;//error due to unknown photon origin
41 Double_t SigCrom (Double_t ckovTh,Double_t ckovPh,Double_t beta )const;//error due to unknonw photon energy
42 Double_t Sigma2 (Double_t ckovTh,Double_t ckovPh )const;//photon candidate sigma
43
44 static void Display ( ); //event display
45
46
47protected:
48 const static Double_t fgkRadThick; //radiator thickness
49 const static Double_t fgkWinThick; //window thickness
50 const static Double_t fgkGapThick; //proximity gap thickness
51 const static Double_t fgkRadIdx; //mean refractive index of RAD material (C6F14)
52 const static Double_t fgkWinIdx; //mean refractive index of WIN material (SiO2)
53 const static Double_t fgkGapIdx; //mean refractive index of GAP material (CH4)
54 Int_t fPhotCnt; // counter of photons candidate
55 Int_t fPhotFlag[3000]; // flags of photon candidates
56 Double_t fPhotCkov[3000]; // Ckov angles of photon candidates, [rad]
57 Double_t fPhotPhi [3000]; // phis of photons candidates, [rad]
58 Double_t fPhotWei [3000]; // weigths of photon candidates
59 Double_t fCkovSigma2; // sigma2 of the reconstructed ring
60
61 Bool_t fIsWEIGHT; // flag to consider weight procedure
62 Float_t fDTheta; // Step for sliding window
63 Float_t fWindowWidth; // Hough width of sliding window
64
65 TVector3 fTrkDir; //track direction in LORS
66 TVector2 fTrkPos; //track positon in LORS at the middle of radiator
67 ClassDef(AliHMPIDRecon,0)
68};
69
70#endif // #ifdef AliHMPIDRecon_cxx
71