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b152a071 | 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 | $Log$ | |
58323221 | 18 | Revision 1.1 2002/01/08 09:59:34 morsch |
19 | Readers for EMCAL primary particle input. | |
20 | ||
b152a071 | 21 | */ |
22 | ||
23 | #include <TFile.h> | |
24 | #include <TTree.h> | |
25 | #include <TParticle.h> | |
26 | ||
27 | #include "AliGenReaderEcalJets.h" | |
28 | #include "AliMC.h" | |
29 | ClassImp(AliGenReaderEcalJets) | |
30 | ||
31 | ||
32 | AliGenReaderEcalJets::AliGenReaderEcalJets() | |
33 | { | |
34 | // Default constructor | |
35 | fNcurrent = 0; | |
36 | fTreeNtuple = 0; | |
37 | } | |
38 | ||
39 | void AliGenReaderEcalJets::Init() | |
40 | { | |
41 | // | |
42 | // reset the existing file environment and open a new root file if | |
43 | // the pointer to the Fluka tree is null | |
44 | ||
45 | TFile *pFile=0; | |
46 | if (!pFile) { | |
47 | pFile = new TFile(fFileName); | |
48 | pFile->cd(); | |
49 | printf("\n I have opened %s file \n", fFileName); | |
50 | } | |
51 | // get the tree address in the Fluka boundary source file | |
52 | fTreeNtuple = (TTree*)gDirectory->Get("h1"); | |
53 | TTree *h1=fTreeNtuple; | |
54 | h1->SetMakeClass(1); | |
55 | //Set branch addresses | |
56 | h1->SetBranchAddress("nev", &fNev); | |
57 | h1->SetBranchAddress("x", fX); | |
58 | h1->SetBranchAddress("xtyp", fXtyp); | |
59 | h1->SetBranchAddress("npart", &fNpart); | |
60 | h1->SetBranchAddress("xpt", fXpt); | |
61 | h1->SetBranchAddress("xeta", fXeta); | |
62 | h1->SetBranchAddress("xphi", fXphi); | |
63 | h1->SetBranchAddress("xid", fXid); | |
64 | h1->SetBranchAddress("njet", &fNjet); | |
65 | h1->SetBranchAddress("jet", fJet); | |
66 | h1->SetBranchAddress("jeta", fJeta); | |
67 | h1->SetBranchAddress("jphi", fJphi); | |
68 | h1->SetBranchAddress("nsjet", &fNsjet); | |
69 | h1->SetBranchAddress("jset", fJset); | |
70 | h1->SetBranchAddress("jseta", fJseta); | |
71 | h1->SetBranchAddress("jsphi", fJsphi); | |
72 | h1->SetBranchAddress("npjet", &fNpjet); | |
73 | h1->SetBranchAddress("jpet", fJpet); | |
74 | h1->SetBranchAddress("jpeta", fJpeta); | |
75 | h1->SetBranchAddress("jpphi", fJpphi); | |
76 | } | |
77 | ||
78 | Int_t AliGenReaderEcalJets::NextEvent() | |
79 | { | |
80 | // Read the next event | |
58323221 | 81 | Int_t nTracks=0, nread=0; |
b152a071 | 82 | |
83 | TFile* pFile = fTreeNtuple->GetCurrentFile(); | |
84 | pFile->cd(); | |
85 | ||
86 | Int_t nentries = (Int_t) fTreeNtuple->GetEntries(); | |
87 | if (fNcurrent < nentries) { | |
88 | Int_t nb = (Int_t)fTreeNtuple->GetEvent(fNcurrent); | |
89 | nread += nb; | |
90 | fNcurrent++; | |
91 | printf("\n Next event contains %d tracks! \n", fNpjet); | |
92 | nTracks = fNpjet; | |
93 | fNparticle = 0; | |
94 | return nTracks; | |
95 | } | |
96 | return 0; | |
97 | } | |
98 | ||
99 | TParticle* AliGenReaderEcalJets::NextParticle() | |
100 | { | |
101 | Float_t p[4]; | |
102 | // Read the next particle | |
103 | Int_t ipart = fXid[fNparticle]; | |
104 | Float_t pt = fXpt[fNparticle]; | |
105 | Float_t eta = fXeta[fNparticle]; | |
106 | Float_t phi = fXphi[fNparticle]; | |
107 | Float_t theta = 2.*TMath::ATan(TMath::Exp(-eta)); | |
108 | Double_t amass = TDatabasePDG::Instance()->GetParticle(ipart)->Mass(); | |
109 | ||
110 | p[0] = pt*TMath::Sin(phi); | |
111 | p[1] = pt*TMath::Cos(phi); | |
112 | p[2] = pt/TMath::Cos(theta); | |
113 | p[3] = TMath::Sqrt(pt*pt+p[2]*p[2]+amass*amass); | |
114 | ||
115 | ||
116 | TParticle* particle = | |
117 | new TParticle(ipart, 0, -1, -1, -1, -1, p[0], p[1], p[2], p[3], | |
118 | 0., 0., 0., 0.); | |
119 | fNparticle++; | |
120 | return particle; | |
121 | } | |
122 | ||
123 | ||
124 | ||
125 | AliGenReaderEcalJets& AliGenReaderEcalJets::operator=(const AliGenReaderEcalJets& rhs) | |
126 | { | |
127 | // Assignment operator | |
128 | return *this; | |
129 | } | |
130 | ||
131 | ||
132 | ||
133 | ||
134 | ||
135 |