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99e5fe42 | 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 | // | |
17 | // Jet ESD Reader | |
18 | // ESD reader for jet analysis | |
19 | // Author: Mercedes Lopez Noriega | |
20 | // mercedes.lopez.noriega@cern.ch | |
21 | // | |
22 | ||
23 | ||
24 | #include <Riostream.h> | |
25 | #include <TSystem.h> | |
26 | #include <TLorentzVector.h> | |
27 | #include "AliJetESDReader.h" | |
28 | #include "AliJetESDReaderHeader.h" | |
29 | #include "AliESD.h" | |
30 | #include "AliESDtrack.h" | |
31 | ||
32 | ClassImp(AliJetESDReader) | |
33 | ||
34 | AliJetESDReader::AliJetESDReader() | |
35 | { | |
36 | // Constructor | |
37 | ||
38 | fReaderHeader = 0x0; | |
39 | fMass = 0; | |
40 | fSign = 0; | |
41 | } | |
42 | ||
43 | //____________________________________________________________________________ | |
44 | ||
45 | AliJetESDReader::~AliJetESDReader() | |
46 | { | |
47 | // Destructor | |
48 | delete fReaderHeader; | |
49 | } | |
50 | ||
51 | //____________________________________________________________________________ | |
52 | ||
53 | void AliJetESDReader::OpenInputFiles() | |
54 | ||
55 | { | |
56 | // chain for the ESDs | |
57 | fChain = new TChain("esdTree"); | |
58 | fChainMC = new TChain("mcStackTree"); | |
59 | ||
60 | // get directory and pattern name from the header | |
61 | const char* dirName=fReaderHeader->GetDirectory(); | |
62 | const char* pattern=fReaderHeader->GetPattern(); | |
63 | ||
64 | // Add files matching patters to the chain | |
65 | void *dir = gSystem->OpenDirectory(dirName); | |
66 | const char *name = 0x0; | |
67 | while ((name = gSystem->GetDirEntry(dir))){ | |
68 | if (strstr(name,pattern)){ | |
69 | printf("Adding %s\n",name); | |
70 | char path[256]; | |
71 | sprintf(path,"%s/%s",dirName,name); | |
72 | fChain->AddFile(path,-1,"esdTree"); | |
73 | fChainMC->AddFile(path,-1,"mcStackTree"); | |
74 | } | |
75 | } | |
76 | ||
77 | gSystem ->FreeDirectory(dir); | |
78 | fChain ->SetBranchAddress("ESD", &fESD); | |
79 | fChainMC->SetBranchAddress("Header", &fAliHeader); | |
80 | fChainMC->SetBranchAddress("Stack", &fArrayMC); | |
81 | ||
82 | int nMax = fChain->GetEntries(); | |
83 | printf("\nTotal number of events in chain= %d",nMax); | |
84 | ||
85 | // set number of events in header | |
86 | if (fReaderHeader->GetLastEvent() == -1) | |
87 | fReaderHeader->SetLastEvent(nMax); | |
88 | else { | |
89 | Int_t nUsr = fReaderHeader->GetLastEvent(); | |
90 | fReaderHeader->SetLastEvent(TMath::Min(nMax,nUsr)); | |
91 | } | |
92 | } | |
93 | ||
94 | //____________________________________________________________________________ | |
95 | ||
96 | void AliJetESDReader::FillMomentumArray(Int_t event) | |
97 | { | |
98 | // Fills the momentum array | |
99 | Int_t goodTrack = 0; | |
100 | Int_t nt = 0; | |
101 | Float_t pt; | |
102 | Double_t p[3]; // track 3 momentum vector | |
103 | ||
104 | // clear momentum array | |
105 | ClearArray(); | |
106 | // get event from chain | |
107 | fChain->GetEntry(event); | |
108 | fChainMC->GetEntry(event); | |
109 | // get number of tracks in event (for the loop) | |
110 | nt = fESD->GetNumberOfTracks(); | |
111 | // get cuts set by user | |
112 | Float_t ptMin = ((AliJetESDReaderHeader*) fReaderHeader)->GetPtCut(); | |
113 | ||
114 | //loop over tracks | |
115 | for (Int_t it = 0; it < nt; it++) { | |
116 | AliESDtrack *track = fESD->GetTrack(it); | |
117 | UInt_t status = track->GetStatus(); | |
118 | if ((status & AliESDtrack::kITSrefit) == 0) continue; // quality check | |
119 | ||
120 | if (((AliJetESDReaderHeader*) fReaderHeader)->ReadSignalOnly() && TMath::Abs(track->GetLabel()) > 10000) continue; | |
121 | ||
122 | track->GetPxPyPz(p); | |
123 | pt = TMath::Sqrt(p[0] * p[0] + p[1] * p[1]); // pt of the track | |
124 | ||
125 | if (pt < ptMin) continue; //check cuts | |
126 | ||
127 | new ((*fMomentumArray)[goodTrack]) | |
128 | TLorentzVector(p[0], p[1], p[2], | |
129 | TMath::Sqrt(pt * pt +p[2] * p[2])); | |
130 | goodTrack++; | |
131 | } | |
132 | ||
133 | printf("\nIn event %d, number of good tracks %d \n", event, goodTrack); | |
134 | } | |
135 | ||
136 |