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1 | #ifndef AliHMPIDHit_h | |
2 | #define AliHMPIDHit_h | |
3 | /* Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved. * | |
4 | * See cxx source for full Copyright notice */ | |
5 | //. | |
6 | // HMPID base class to produce hits | |
7 | //. | |
8 | //. | |
9 | #include <AliHit.h> //base class | |
10 | #include <TVector3.h> //ctor | |
11 | #include "AliHMPIDDigit.h" //QdcTot() | |
12 | ||
13 | #include <TRandom.h> | |
14 | ||
15 | class AliHMPIDHit : public AliHit // TObject-AliHit-AliHMPIDHit | |
16 | { | |
17 | public: | |
18 | AliHMPIDHit( ):AliHit( ),fCh(-1),fPid(-1 ),fQ(-1),fLx(0),fLy(0){} //default ctor | |
19 | AliHMPIDHit(Int_t c,Float_t &e,Int_t pid,Int_t tid,Float_t x,Float_t y,const TVector3 &p):AliHit(0,tid),fCh(c ),fPid(pid),fQ(0 ),fLx(x),fLy(y){e=QdcTot(e);fX=p.X();fY=p.Y();fZ=p.Z();} | |
20 | AliHMPIDHit(Int_t c,Float_t &e,Int_t pid,Int_t tid,Float_t x,Float_t y ):AliHit( ),fCh(c ),fPid(pid),fQ(0 ),fLx(x),fLy(y){e=QdcTot(e);fTrack=tid;}//manual ctor | |
21 | AliHMPIDHit(const AliHMPIDHit &h):AliHit(h),fCh(h.fCh),fPid(h.fPid),fQ(h.fQ),fLx(h.fLx),fLy(h.fLy) {}//copy ctor | |
22 | virtual ~AliHMPIDHit() {} | |
23 | //framework part | |
24 | void Print(Option_t *opt="")const; //from TObject to print current status | |
25 | void Draw (Option_t *opt=""); //from TObject to Draw this hit | |
26 | //private part | |
27 | Int_t Ch ( )const{return fCh; } //Chamber | |
28 | void Hit2Sdi(TClonesArray *pSdiLst,Int_t n=1)const; //add sdigits of this hit to the list | |
29 | Float_t LorsX ( )const{return fLx; } //hit X position in LORS, [cm] | |
30 | Float_t LorsY ( )const{return fLy; } //hit Y position in LORS, [cm] | |
31 | Int_t Pid ( )const{return fPid; } //PID | |
32 | Float_t Q ( )const{return fQ; } //total charge, [QDC] | |
33 | inline Float_t QdcTot (Float_t e ); //calculate total charge of the hit | |
34 | Int_t Tid ( )const{return fTrack; } //TID | |
35 | void SetQ (Float_t q ) {fQ=q; } //for debugging... | |
36 | protected: //AliHit has fTrack,fX,fY,fZ | |
37 | Int_t fCh; //Chamber | |
38 | Int_t fPid; //PID | |
39 | Float_t fQ; //total charge [QDC] | |
40 | Float_t fLx; //hit X position in chamber LORS, [cm] | |
41 | Float_t fLy; //hit Y position in chamber LORS, [cm] | |
42 | ClassDef(AliHMPIDHit,5) //HMPID hit class | |
43 | };//class AliHMPIDhit | |
44 | //++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ | |
45 | Float_t AliHMPIDHit::QdcTot(Float_t e) | |
46 | { | |
47 | // Samples total charge of the hit | |
48 | // Arguments: e- hit energy [GeV] for mip Eloss for photon Etot | |
49 | // Returns: total QDC | |
50 | Int_t pc,px,py; | |
51 | AliHMPIDParam::Lors2Pad(fLx,fLy,pc,px,py); | |
52 | if(py<0) fQ=0; | |
53 | else { | |
54 | Float_t y=AliHMPIDParam::LorsY(pc,py); | |
55 | fLy=((y-fLy)>0)?y-0.2:y+0.2; //shift to the nearest anod wire | |
56 | ||
57 | Float_t x=(fLx > 66.6)? fLx-66.6:fLx; //sagita is for PC (0-64) and not for chamber | |
58 | Float_t qdcEle=34.06311+0.2337070*x+5.807476e-3*x*x-2.956471e-04*x*x*x+2.310001e-06*x*x*x*x; //reparametrised from DiMauro | |
59 | ||
60 | Int_t iNele=Int_t(e/26e-9); if(iNele<1) iNele = 1; //number of electrons created by hit, if photon e=0 implies iNele=1 | |
61 | fQ=0; | |
62 | for(Int_t i=1;i<=iNele;i++){ | |
63 | Double_t rnd=gRandom->Rndm(); if(rnd==0) rnd=1e-12; //1e-12 is a protection against 0 from rndm | |
64 | fQ-=qdcEle*TMath::Log(rnd); | |
65 | } | |
66 | } | |
67 | return fQ; | |
68 | } | |
69 | //++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ | |
70 | ||
71 | #endif |