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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 | // HMPID base class to reconstruct an event | |
17 | //. | |
18 | //. | |
19 | //. | |
20 | #include "AliHMPIDReconstructor.h" //class header | |
21 | #include "AliHMPID.h" //Reconstruct() | |
22 | #include "AliHMPIDCluster.h" //Dig2Clu() | |
23 | #include "AliHMPIDParam.h" //FillEsd() | |
24 | #include <AliESD.h> //FillEsd() | |
25 | #include <AliRawReader.h> //Reconstruct() for raw digits | |
26 | ClassImp(AliHMPIDReconstructor) | |
27 | ||
28 | //++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ | |
29 | AliHMPIDReconstructor::AliHMPIDReconstructor():AliReconstructor() | |
30 | { | |
31 | // | |
32 | //ctor | |
33 | // | |
34 | fClu=new TObjArray(AliHMPIDDigit::kMaxCh+1); | |
35 | fDig=new TObjArray(AliHMPIDDigit::kMaxCh+1); | |
36 | fClu->SetOwner(kTRUE); | |
37 | for(int i=AliHMPIDDigit::kMinCh;i<=AliHMPIDDigit::kMaxCh;i++){ | |
38 | fDig->AddAt(new TClonesArray("AliHMPIDDigit"),i); | |
39 | fClu->AddAt(new TClonesArray("AliHMPIDCluster"),i); | |
40 | } | |
41 | fDig->SetOwner(kTRUE); | |
42 | }//AliHMPIDReconstructor | |
43 | //++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ | |
44 | void AliHMPIDReconstructor::Dig2Clu(TObjArray *pDigAll,TObjArray *pCluAll,Bool_t isTryUnfold) | |
45 | { | |
46 | // Finds all clusters for a given digits list provided not empty. Currently digits list is a list of all digits for a single chamber. | |
47 | // Puts all found clusters in separate lists, one per clusters. | |
48 | // Arguments: pDigAll - list of digits for all chambers | |
49 | // pCluAll - list of clusters for all chambers | |
50 | // isTryUnfold - flag to choose between CoG and Mathieson fitting | |
51 | // Returns: none | |
52 | TMatrixF padMap(AliHMPIDDigit::kMinPx,AliHMPIDDigit::kMaxPcx,AliHMPIDDigit::kMinPy,AliHMPIDDigit::kMaxPcy); //pads map for single chamber 0..159 x 0..143 | |
53 | ||
54 | for(Int_t iCh=AliHMPIDDigit::kMinCh;iCh<=AliHMPIDDigit::kMaxCh;iCh++){ //chambers loop | |
55 | TClonesArray *pDigCur=(TClonesArray*)pDigAll->At(iCh); //get list of digits for current chamber | |
56 | if(pDigCur->GetEntriesFast()==0) continue; //no digits for current chamber | |
57 | ||
58 | padMap=(Float_t)-1; //reset map to -1 (means no digit for this pad) | |
59 | TClonesArray *pCluCur=(TClonesArray*)pCluAll->At(iCh); //get list of clusters for current chamber | |
60 | ||
61 | for(Int_t iDig=0;iDig<pDigCur->GetEntriesFast();iDig++){ //digits loop to fill pads map | |
62 | AliHMPIDDigit *pDig= (AliHMPIDDigit*)pDigCur->At(iDig); //get current digit | |
63 | padMap( pDig->PadChX(), pDig->PadChY() )=iDig; //fill the map, (padx,pady) cell takes digit index | |
64 | }//digits loop to fill digits map | |
65 | ||
66 | AliHMPIDCluster clu; //tmp cluster to be used as current | |
67 | ||
68 | for(Int_t iDig=0;iDig<pDigCur->GetEntriesFast();iDig++){ //digits loop for current chamber | |
69 | AliHMPIDDigit *pDig=(AliHMPIDDigit*)pDigCur->At(iDig); //take current digit | |
70 | if(!(pDig=UseDig(pDig->PadChX(),pDig->PadChY(),pDigCur,&padMap))) continue; //this digit is already taken in FormClu(), go after next digit | |
71 | FormClu(&clu,pDig,pDigCur,&padMap); //form cluster starting from this digit by recursion | |
72 | ||
73 | clu.Solve(pCluCur,isTryUnfold); //solve this cluster and add all unfolded clusters to provided list | |
74 | clu.Reset(); //empty current cluster | |
75 | }//digits loop for current chamber | |
76 | }//chambers loop | |
77 | }//Dig2Clu() | |
78 | //++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ | |
79 | void AliHMPIDReconstructor::FormClu(AliHMPIDCluster *pClu,AliHMPIDDigit *pDig,TClonesArray *pDigLst,TMatrixF *pDigMap) | |
80 | { | |
81 | // Forms the initial cluster as a combination of all adjascent digits. Starts from the given digit then calls itself recursevly for all neighbours. | |
82 | // Arguments: pClu - pointer to cluster being formed | |
83 | // Returns: none | |
84 | pClu->DigAdd(pDig);//take this digit in cluster | |
85 | ||
86 | Int_t cnt=0,cx[4],cy[4]; | |
87 | ||
88 | if(pDig->PadPcX() != AliHMPIDDigit::kMinPx){cx[cnt]=pDig->PadChX()-1; cy[cnt]=pDig->PadChY() ;cnt++;} //left | |
89 | if(pDig->PadPcX() != AliHMPIDDigit::kMaxPx){cx[cnt]=pDig->PadChX()+1; cy[cnt]=pDig->PadChY() ;cnt++;} //right | |
90 | if(pDig->PadPcY() != AliHMPIDDigit::kMinPy){cx[cnt]=pDig->PadChX() ; cy[cnt]=pDig->PadChY()-1;cnt++;} //down | |
91 | if(pDig->PadPcY() != AliHMPIDDigit::kMaxPy){cx[cnt]=pDig->PadChX() ; cy[cnt]=pDig->PadChY()+1;cnt++;} //up | |
92 | ||
93 | for (Int_t i=0;i<cnt;i++){//neighbours loop | |
94 | 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 | |
95 | }//neighbours loop | |
96 | }//FormClu() | |
97 | //++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ | |
98 | void AliHMPIDReconstructor::Reconstruct(TTree *pDigTree,TTree *pCluTree)const | |
99 | { | |
100 | //Invoked by AliReconstruction to convert digits to clusters i.e. reconstruct simulated data | |
101 | //Arguments: pDigTree - pointer to Digit tree | |
102 | // pCluTree - poitner to Cluster tree | |
103 | // Returns: none | |
104 | AliDebug(1,"Start."); | |
105 | for(Int_t iCh=AliHMPIDDigit::kMinCh;iCh<=AliHMPIDDigit::kMaxCh;iCh++) { | |
106 | pCluTree->Branch(Form("HMPID%d",iCh),&((*fClu)[iCh]),4000,0); | |
107 | pDigTree->SetBranchAddress(Form("HMPID%d",iCh),&((*fDig)[iCh])); | |
108 | } | |
109 | pDigTree->GetEntry(0); | |
110 | Dig2Clu(fDig,fClu); //cluster finder | |
111 | pCluTree->Fill(); //fill tree for current event | |
112 | ||
113 | for(Int_t iCh=AliHMPIDDigit::kMinCh;iCh<=AliHMPIDDigit::kMaxCh;iCh++){ | |
114 | fDig->At(iCh)->Clear(); | |
115 | fClu->At(iCh)->Clear(); | |
116 | } | |
117 | ||
118 | AliDebug(1,"Stop."); | |
119 | }//Reconstruct(for simulated digits) | |
120 | //++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ | |
121 | void AliHMPIDReconstructor::Reconstruct(AliRunLoader *pAL,AliRawReader* pRR)const | |
122 | { | |
123 | //Invoked by AliReconstruction to convert raw digits from DDL files to clusters | |
124 | //Arguments: pAL - ALICE run loader pointer | |
125 | // pRR - ALICE raw reader pointer | |
126 | // Returns: none | |
127 | AliLoader *pRL=pAL->GetDetectorLoader("HMPID"); AliHMPID *pRich=(AliHMPID*)pAL->GetAliRun()->GetDetector("HMPID");//get pointers for HMPID and HMPID loader | |
128 | ||
129 | AliHMPIDDigit dig; //tmp digit, raw digit will be converted to it | |
130 | ||
131 | 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 | |
132 | ||
133 | Int_t iEvtN=0; | |
134 | while(pRR->NextEvent()){//events loop | |
135 | pAL->GetEvent(iEvtN++); | |
136 | pRL->MakeTree("R"); pRich->MakeBranch("R"); | |
137 | ||
138 | for(Int_t iCh=0;iCh<7;iCh++){//chambers loop | |
139 | pRR->Select("HMPID",2*iCh,2*iCh+1);//select only DDL files for the current chamber | |
140 | UInt_t w32=0; | |
141 | while(pRR->ReadNextInt(w32)){//raw records loop (in selected DDL files) | |
142 | UInt_t ddl=pRR->GetDDLID(); //returns 0,1,2 ... 13 | |
143 | dig.Raw(w32,ddl); | |
144 | 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())); | |
145 | new((*((TClonesArray*)digLst.At(iCh)))[iDigCnt[iCh]++]) AliHMPIDDigit(dig); //add this digit to the tmp list | |
146 | }//raw records loop | |
147 | pRR->Reset(); | |
148 | }//chambers loop | |
149 | ||
150 | Dig2Clu(&digLst,pRich->CluLst());//cluster finder for all chambers | |
151 | for(Int_t i=0;i<7;i++){digLst.At(i)->Delete(); iDigCnt[i]=0;} //clean up list of digits for all chambers | |
152 | ||
153 | pRL->TreeR()->Fill(); //fill tree for current event | |
154 | pRL->WriteRecPoints("OVERWRITE");//write out clusters for current event | |
155 | pRich->CluReset(); | |
156 | }//events loop | |
157 | pRL->UnloadRecPoints(); | |
158 | }//Reconstruct raw data | |
159 | //++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ | |
160 | void AliHMPIDReconstructor::ConvertDigits(AliRawReader *pRR,TTree *pDigTree)const | |
161 | { | |
162 | //Invoked by AliReconstruction to convert raw digits from DDL files to digits | |
163 | //Arguments: pRR - ALICE raw reader pointer | |
164 | // pDigTree - pointer to Digit tree | |
165 | // Returns: none | |
166 | AliDebug(1,"Start."); | |
167 | AliHMPIDDigit dig; //tmp digit, raw digit will be converted to it | |
168 | for(Int_t iCh=AliHMPIDDigit::kMinCh;iCh<=AliHMPIDDigit::kMaxCh;iCh++) { | |
169 | pDigTree->Branch(Form("HMPID%d",iCh),&((*fDig)[iCh]),4000,0); | |
170 | pRR->Select("HMPID",2*iCh,2*iCh+1);//select only DDL files for the current chamber | |
171 | Int_t iDigCnt=0; | |
172 | UInt_t w32=0; | |
173 | while(pRR->ReadNextInt(w32)){//raw records loop (in selected DDL files) | |
174 | UInt_t ddl=pRR->GetDDLID(); //returns 0,1,2 ... 13 | |
175 | dig.Raw(w32,ddl); | |
176 | 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())); | |
177 | new((*((TClonesArray*)fDig->At(iCh)))[iDigCnt++]) AliHMPIDDigit(dig); //add this digit to the tmp list | |
178 | }//raw records loop | |
179 | pRR->Reset(); | |
180 | }//chambers loop | |
181 | pDigTree->Fill(); | |
182 | for(Int_t iCh=AliHMPIDDigit::kMinCh;iCh<=AliHMPIDDigit::kMaxCh;iCh++)fDig->At(iCh)->Clear(); | |
183 | AliDebug(1,"Stop."); | |
184 | }//Reconstruct digits from raw digits | |
185 | //++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ | |
186 | void AliHMPIDReconstructor::FillESD(AliRunLoader *, AliESD *pESD) const | |
187 | { | |
188 | // Calculates probability to be a electron-muon-pion-kaon-proton | |
189 | // from the given Cerenkov angle and momentum assuming no initial particle composition | |
190 | // (i.e. apriory probability to be the particle of the given sort is the same for all sorts) | |
191 | ||
192 | AliPID ppp; //needed | |
193 | Double_t pid[AliPID::kSPECIES],h[AliPID::kSPECIES]; | |
194 | ||
195 | for(Int_t iTrk=0;iTrk<pESD->GetNumberOfTracks();iTrk++){//ESD tracks loop | |
196 | AliESDtrack *pTrk = pESD->GetTrack(iTrk);// get next reconstructed track | |
197 | if(pTrk->GetHMPIDsignal()<=0){//HMPID does not find anything reasonable for this track, assign 0.2 for all species | |
198 | for(Int_t iPart=0;iPart<AliPID::kSPECIES;iPart++) pid[iPart]=1.0/AliPID::kSPECIES; | |
199 | pTrk->SetHMPIDpid(pid); | |
200 | continue; | |
201 | } | |
202 | Double_t pmod = pTrk->GetP(); | |
203 | Double_t hTot=0; | |
204 | for(Int_t iPart=0;iPart<AliPID::kSPECIES;iPart++){ | |
205 | Double_t mass = AliPID::ParticleMass(iPart); | |
206 | Double_t cosThetaTh = TMath::Sqrt(mass*mass+pmod*pmod)/(AliHMPIDParam::Instance()->MeanIdxRad()*pmod); | |
207 | if(cosThetaTh<1) //calculate the height of theoretical theta ckov on the gaus of experimental one | |
208 | h[iPart] =TMath::Gaus(TMath::ACos(cosThetaTh),pTrk->GetHMPIDsignal(),TMath::Sqrt(pTrk->GetHMPIDchi2()),kTRUE); | |
209 | else //beta < 1/ref. idx. => no light at all | |
210 | h[iPart] =0 ; | |
211 | hTot +=h[iPart]; //total height of all theoretical heights for normalization | |
212 | }//species loop | |
213 | ||
214 | Double_t hMin=TMath::Gaus(pTrk->GetHMPIDsignal()-4*TMath::Sqrt(pTrk->GetHMPIDchi2()),pTrk->GetHMPIDsignal(),TMath::Sqrt(pTrk->GetHMPIDchi2()),kTRUE);//5 sigma protection | |
215 | ||
216 | for(Int_t iPart=0;iPart<AliPID::kSPECIES;iPart++)//species loop to assign probabilities | |
217 | if(hTot>hMin) | |
218 | pid[iPart]=h[iPart]/hTot; | |
219 | else //all theoretical values are far away from experemental one | |
220 | pid[iPart]=1.0/AliPID::kSPECIES; | |
221 | pTrk->SetHMPIDpid(pid); | |
222 | }//ESD tracks loop | |
223 | }//FillESD() | |
224 | //++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ |