gAlice dependence removed!
[u/mrichter/AliRoot.git] / HMPID / AliHMPIDReconstructor.cxx
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d3da6dc4 1/**************************************************************************
2 * Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved. *
3 * *
4 * Author: The ALICE Off-line Project. *
5 * Contributors are mentioned in the code where appropriate. *
6 * *
7 * Permission to use, copy, modify and distribute this software and its *
8 * documentation strictly for non-commercial purposes is hereby granted *
9 * without fee, provided that the above copyright notice appears in all *
10 * copies and that both the copyright notice and this permission notice *
11 * appear in the supporting documentation. The authors make no claims *
12 * about the suitability of this software for any purpose. It is *
13 * provided "as is" without express or implied warranty. *
14 **************************************************************************/
15
16#include "AliHMPIDReconstructor.h" //class header
17#include "AliHMPID.h" //Reconstruct()
a1d55ff3 18#include "AliHMPIDCluster.h" //Dig2Clu()
d3da6dc4 19#include "AliHMPIDParam.h" //FillEsd()
20#include <AliESD.h> //FillEsd()
d3da6dc4 21#include <AliRawReader.h> //Reconstruct() for raw digits
d3da6dc4 22ClassImp(AliHMPIDReconstructor)
23
94b1fbfa 24//++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
25AliHMPIDReconstructor::AliHMPIDReconstructor():AliReconstructor()
26{
27//
28//ctor
29//
30 fClu=new TObjArray(AliHMPIDDigit::kMaxCh+1);
31 fDig=new TObjArray(AliHMPIDDigit::kMaxCh+1);
32 fClu->SetOwner(kTRUE);
33 for(int i=AliHMPIDDigit::kMinCh;i<=AliHMPIDDigit::kMaxCh;i++){
34 fDig->AddAt(new TClonesArray("AliHMPIDDigit"),i);
35 fClu->AddAt(new TClonesArray("AliHMPIDCluster"),i);
36 }
37 fDig->SetOwner(kTRUE);
38}//AliHMPIDReconstructor
d3da6dc4 39//++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
3c6274c1 40void AliHMPIDReconstructor::Dig2Clu(TObjArray *pDigAll,TObjArray *pCluAll,Bool_t isTryUnfold)
d3da6dc4 41{
42// Finds all clusters for a given digits list provided not empty. Currently digits list is a list of all digits for a single chamber.
43// Puts all found clusters in separate lists, one per clusters.
3c6274c1 44// Arguments: pDigAll - list of digits for all chambers
45// pCluAll - list of clusters for all chambers
d3da6dc4 46// isTryUnfold - flag to choose between CoG and Mathieson fitting
47// Returns: none
a1d55ff3 48 TMatrixF padMap(AliHMPIDDigit::kMinPx,AliHMPIDDigit::kMaxPcx,AliHMPIDDigit::kMinPy,AliHMPIDDigit::kMaxPcy); //pads map for single chamber 0..159 x 0..143
3c6274c1 49
a1d55ff3 50 for(Int_t iCh=AliHMPIDDigit::kMinCh;iCh<=AliHMPIDDigit::kMaxCh;iCh++){ //chambers loop
3c6274c1 51 TClonesArray *pDigCur=(TClonesArray*)pDigAll->At(iCh); //get list of digits for current chamber
52 if(pDigCur->GetEntriesFast()==0) continue; //no digits for current chamber
d3da6dc4 53
3c6274c1 54 padMap=(Float_t)-1; //reset map to -1 (means no digit for this pad)
55 TClonesArray *pCluCur=(TClonesArray*)pCluAll->At(iCh); //get list of clusters for current chamber
56
57 for(Int_t iDig=0;iDig<pDigCur->GetEntriesFast();iDig++){ //digits loop to fill pads map
58 AliHMPIDDigit *pDig= (AliHMPIDDigit*)pDigCur->At(iDig); //get current digit
59 padMap( pDig->PadChX(), pDig->PadChY() )=iDig; //fill the map, (padx,pady) cell takes digit index
60 }//digits loop to fill digits map
61
62 AliHMPIDCluster clu; //tmp cluster to be used as current
d3da6dc4 63
3c6274c1 64 for(Int_t iDig=0;iDig<pDigCur->GetEntriesFast();iDig++){ //digits loop for current chamber
65 AliHMPIDDigit *pDig=(AliHMPIDDigit*)pDigCur->At(iDig); //take current digit
66 if(!(pDig=UseDig(pDig->PadChX(),pDig->PadChY(),pDigCur,&padMap))) continue; //this digit is already taken in FormClu(), go after next digit
67 FormClu(&clu,pDig,pDigCur,&padMap); //form cluster starting from this digit by recursion
68
69 clu.Solve(pCluCur,isTryUnfold); //solve this cluster and add all unfolded clusters to provided list
70 clu.Reset(); //empty current cluster
71 }//digits loop for current chamber
72 }//chambers loop
d3da6dc4 73}//Dig2Clu()
74//++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
75void AliHMPIDReconstructor::FormClu(AliHMPIDCluster *pClu,AliHMPIDDigit *pDig,TClonesArray *pDigLst,TMatrixF *pDigMap)
76{
a1d55ff3 77// Forms the initial cluster as a combination of all adjascent digits. Starts from the given digit then calls itself recursevly for all neighbours.
d3da6dc4 78// Arguments: pClu - pointer to cluster being formed
a1d55ff3 79// Returns: none
d3da6dc4 80 pClu->DigAdd(pDig);//take this digit in cluster
81
3c6274c1 82 Int_t cnt=0,cx[4],cy[4];
d3da6dc4 83
a1d55ff3 84 if(pDig->PadPcX() != AliHMPIDDigit::kMinPx){cx[cnt]=pDig->PadChX()-1; cy[cnt]=pDig->PadChY() ;cnt++;} //left
85 if(pDig->PadPcX() != AliHMPIDDigit::kMaxPx){cx[cnt]=pDig->PadChX()+1; cy[cnt]=pDig->PadChY() ;cnt++;} //right
86 if(pDig->PadPcY() != AliHMPIDDigit::kMinPy){cx[cnt]=pDig->PadChX() ; cy[cnt]=pDig->PadChY()-1;cnt++;} //down
87 if(pDig->PadPcY() != AliHMPIDDigit::kMaxPy){cx[cnt]=pDig->PadChX() ; cy[cnt]=pDig->PadChY()+1;cnt++;} //up
d3da6dc4 88
a1d55ff3 89 for (Int_t i=0;i<cnt;i++){//neighbours loop
3c6274c1 90 if((pDig=UseDig(cx[i],cy[i],pDigLst,pDigMap))) FormClu(pClu,pDig,pDigLst,pDigMap); //check if this neighbour pad fired and mark it as taken
a1d55ff3 91 }//neighbours loop
d3da6dc4 92}//FormClu()
93//++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
94b1fbfa 94void AliHMPIDReconstructor::Reconstruct(TTree *pDigTree,TTree *pCluTree)const
d3da6dc4 95{
96//Invoked by AliReconstruction to convert digits to clusters i.e. reconstruct simulated data
94b1fbfa 97//Arguments: pDigTree - pointer to Digit tree
98// pCluTree - poitner to Cluster tree
d3da6dc4 99// Returns: none
100 AliDebug(1,"Start.");
94b1fbfa 101 for(Int_t iCh=AliHMPIDDigit::kMinCh;iCh<=AliHMPIDDigit::kMaxCh;iCh++) {
102 pCluTree->Branch(Form("HMPID%d",iCh),&((*fClu)[iCh]),4000,0);
103 pDigTree->SetBranchAddress(Form("HMPID%d",iCh),&((*fDig)[iCh]));
104 }
105 pDigTree->GetEntry(0);
106 Dig2Clu(fDig,fClu); //cluster finder
107 pCluTree->Fill(); //fill tree for current event
108
109 for(Int_t iCh=AliHMPIDDigit::kMinCh;iCh<=AliHMPIDDigit::kMaxCh;iCh++){
110 fDig->At(iCh)->Clear();
111 fClu->At(iCh)->Clear();
112 }
d3da6dc4 113
d3da6dc4 114 AliDebug(1,"Stop.");
115}//Reconstruct(for simulated digits)
a1d55ff3 116//++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
d3da6dc4 117void AliHMPIDReconstructor::Reconstruct(AliRunLoader *pAL,AliRawReader* pRR)const
118{
119//Invoked by AliReconstruction to convert raw digits from DDL files to clusters
120//Arguments: pAL - ALICE run loader pointer
94b1fbfa 121// pRR - ALICE raw reader pointer
122// Returns: none
d3da6dc4 123 AliLoader *pRL=pAL->GetDetectorLoader("HMPID"); AliHMPID *pRich=(AliHMPID*)pAL->GetAliRun()->GetDetector("HMPID");//get pointers for HMPID and HMPID loader
94b1fbfa 124
d3da6dc4 125 AliHMPIDDigit dig; //tmp digit, raw digit will be converted to it
94b1fbfa 126
127 TObjArray digLst; Int_t iDigCnt[7]; for(Int_t i=0;i<7;i++){digLst.AddAt(new TClonesArray("AliHMPIDDigit"),i); iDigCnt[i]=0;} //tmp list of digits for allchambers
128
d3da6dc4 129 Int_t iEvtN=0;
130 while(pRR->NextEvent()){//events loop
131 pAL->GetEvent(iEvtN++);
132 pRL->MakeTree("R"); pRich->MakeBranch("R");
94b1fbfa 133
d3da6dc4 134 for(Int_t iCh=0;iCh<7;iCh++){//chambers loop
94b1fbfa 135 pRR->Select("HMPID",2*iCh,2*iCh+1);//select only DDL files for the current chamber
d3da6dc4 136 UInt_t w32=0;
137 while(pRR->ReadNextInt(w32)){//raw records loop (in selected DDL files)
138 UInt_t ddl=pRR->GetDDLID(); //returns 0,1,2 ... 13
94b1fbfa 139 dig.Raw(w32,ddl);
da08475b 140 AliDebug(1,Form("Ch=%i DDL=%i raw=0x%x digit=(%3i,%3i,%3i,%3i) Q=%5.2f",iCh,ddl,w32,dig.Ch(),dig.Pc(),dig.PadPcX(),dig.PadPcY(),dig.Q()));
3c6274c1 141 new((*((TClonesArray*)digLst.At(iCh)))[iDigCnt[iCh]++]) AliHMPIDDigit(dig); //add this digit to the tmp list
d3da6dc4 142 }//raw records loop
94b1fbfa 143 pRR->Reset();
d3da6dc4 144 }//chambers loop
94b1fbfa 145
3c6274c1 146 Dig2Clu(&digLst,pRich->CluLst());//cluster finder for all chambers
147 for(Int_t i=0;i<7;i++){digLst.At(i)->Delete(); iDigCnt[i]=0;} //clean up list of digits for all chambers
94b1fbfa 148
d3da6dc4 149 pRL->TreeR()->Fill(); //fill tree for current event
150 pRL->WriteRecPoints("OVERWRITE");//write out clusters for current event
151 pRich->CluReset();
94b1fbfa 152 }//events loop
153 pRL->UnloadRecPoints();
d3da6dc4 154}//Reconstruct raw data
155//++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
94b1fbfa 156void AliHMPIDReconstructor::ConvertDigits(AliRawReader *pRR,TTree *pDigTree)const
157{
158//Invoked by AliReconstruction to convert raw digits from DDL files to digits
159//Arguments: pRR - ALICE raw reader pointer
160// pDigTree - pointer to Digit tree
161// Returns: none
162 AliDebug(1,"Start.");
163 AliHMPIDDigit dig; //tmp digit, raw digit will be converted to it
164 for(Int_t iCh=AliHMPIDDigit::kMinCh;iCh<=AliHMPIDDigit::kMaxCh;iCh++) {
165 pDigTree->Branch(Form("HMPID%d",iCh),&((*fDig)[iCh]),4000,0);
166 pRR->Select("HMPID",2*iCh,2*iCh+1);//select only DDL files for the current chamber
167 Int_t iDigCnt=0;
168 UInt_t w32=0;
169 while(pRR->ReadNextInt(w32)){//raw records loop (in selected DDL files)
170 UInt_t ddl=pRR->GetDDLID(); //returns 0,1,2 ... 13
171 dig.Raw(w32,ddl);
172 AliDebug(1,Form("Ch=%i DDL=%i raw=0x%x digit=(%3i,%3i,%3i,%3i) Q=%5.2f",iCh,ddl,w32,dig.Ch(),dig.Pc(),dig.PadPcX(),dig.PadPcY(),dig.Q()));
173 new((*((TClonesArray*)fDig->At(iCh)))[iDigCnt++]) AliHMPIDDigit(dig); //add this digit to the tmp list
174 }//raw records loop
175 pRR->Reset();
176 }//chambers loop
177 pDigTree->Fill();
178 for(Int_t iCh=AliHMPIDDigit::kMinCh;iCh<=AliHMPIDDigit::kMaxCh;iCh++)fDig->At(iCh)->Clear();
179 AliDebug(1,"Stop.");
180}//Reconstruct digits from raw digits
181//++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
d3da6dc4 182void AliHMPIDReconstructor::FillESD(AliRunLoader *, AliESD *pESD) const
183{
184// Calculates probability to be a electron-muon-pion-kaon-proton
185// from the given Cerenkov angle and momentum assuming no initial particle composition
186// (i.e. apriory probability to be the particle of the given sort is the same for all sorts)
187
188 AliPID ppp; //needed
189 Double_t pid[AliPID::kSPECIES],h[AliPID::kSPECIES];
190
191 for(Int_t iTrk=0;iTrk<pESD->GetNumberOfTracks();iTrk++){//ESD tracks loop
192 AliESDtrack *pTrk = pESD->GetTrack(iTrk);// get next reconstructed track
193 if(pTrk->GetHMPIDsignal()<=0){//HMPID does not find anything reasonable for this track, assign 0.2 for all species
194 for(Int_t iPart=0;iPart<AliPID::kSPECIES;iPart++) pid[iPart]=1.0/AliPID::kSPECIES;
195 pTrk->SetHMPIDpid(pid);
196 continue;
197 }
198 Double_t pmod = pTrk->GetP();
199 Double_t hTot=0;
200 for(Int_t iPart=0;iPart<AliPID::kSPECIES;iPart++){
201 Double_t mass = AliPID::ParticleMass(iPart);
202 Double_t cosThetaTh = TMath::Sqrt(mass*mass+pmod*pmod)/(AliHMPIDParam::Instance()->MeanIdxRad()*pmod);
a1d55ff3 203 if(cosThetaTh<1) //calculate the height of theoretical theta ckov on the gaus of experimental one
204 h[iPart] =TMath::Gaus(TMath::ACos(cosThetaTh),pTrk->GetHMPIDsignal(),TMath::Sqrt(pTrk->GetHMPIDchi2()),kTRUE);
d3da6dc4 205 else //beta < 1/ref. idx. => no light at all
206 h[iPart] =0 ;
207 hTot +=h[iPart]; //total height of all theoretical heights for normalization
208 }//species loop
209
210 Double_t hMin=TMath::Gaus(pTrk->GetHMPIDsignal()-4*TMath::Sqrt(pTrk->GetHMPIDchi2()),pTrk->GetHMPIDsignal(),TMath::Sqrt(pTrk->GetHMPIDchi2()),kTRUE);//5 sigma protection
211
212 for(Int_t iPart=0;iPart<AliPID::kSPECIES;iPart++)//species loop to assign probabilities
213 if(hTot>hMin)
214 pid[iPart]=h[iPart]/hTot;
215 else //all theoretical values are far away from experemental one
216 pid[iPart]=1.0/AliPID::kSPECIES;
217 pTrk->SetHMPIDpid(pid);
218 }//ESD tracks loop
a1d55ff3 219}//FillESD()
d3da6dc4 220//++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++