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f24650c5 | 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 | /* | |
18 | $Log$ | |
4facea7f | 19 | Revision 1.3 2002/10/21 09:20:51 alibrary |
20 | Introduce Riostream.h and remove unused variables | |
21 | ||
159ec319 | 22 | Revision 1.2 2001/11/12 14:31:00 morsch |
23 | Memory leaks fixed. (M. Bondila) | |
24 | ||
ae872676 | 25 | Revision 1.1 2001/11/09 09:10:46 morsch |
26 | Realisation of AliGenReader that reads the old cwn event format. | |
27 | ||
f24650c5 | 28 | */ |
29 | ||
30 | // Read the old ALICE event format based on CW-ntuples | |
31 | // http://consult.cern.ch/alice/Internal_Notes/1995/32/abstract | |
32 | // .cwn file have to be converted to .root using h2root | |
33 | // Use SetFileName(file) to read from "file" | |
34 | // Author: andreas.morsch@cern.ch | |
35 | ||
36 | #include <TFile.h> | |
37 | #include <TTree.h> | |
38 | #include <TParticle.h> | |
39 | ||
40 | #include "AliGenReaderCwn.h" | |
41 | #include "AliMC.h" | |
42 | ClassImp(AliGenReaderCwn); | |
43 | ||
44 | ||
45 | AliGenReaderCwn::AliGenReaderCwn() | |
46 | { | |
47 | // Default constructor | |
48 | fNcurrent = 0; | |
49 | fTreeNtuple = 0; | |
50 | } | |
51 | ||
ae872676 | 52 | AliGenReaderCwn::~AliGenReaderCwn() |
53 | { | |
54 | delete fTreeNtuple; | |
55 | } | |
56 | ||
f24650c5 | 57 | void AliGenReaderCwn::Init() |
58 | { | |
59 | // | |
60 | // reset the existing file environment and open a new root file if | |
61 | // the pointer to the Fluka tree is null | |
62 | ||
63 | TFile *pFile=0; | |
64 | if (!pFile) { | |
65 | pFile = new TFile(fFileName); | |
66 | pFile->cd(); | |
67 | printf("\n I have opened %s file \n", fFileName); | |
68 | } | |
69 | // get the tree address in the Fluka boundary source file | |
70 | fTreeNtuple = (TTree*)gDirectory->Get("h888"); | |
71 | ||
72 | TTree *h2=fTreeNtuple; | |
73 | //Set branch addresses | |
74 | h2->SetBranchAddress("Nihead",&fNihead); | |
75 | h2->SetBranchAddress("Ihead",fIhead); | |
76 | h2->SetBranchAddress("Nrhead",&fNrhead); | |
77 | h2->SetBranchAddress("Rhead",fRhead); | |
78 | h2->SetBranchAddress("Idpart",&fIdpart); | |
79 | h2->SetBranchAddress("Theta",&fTheta); | |
80 | h2->SetBranchAddress("Phi",&fPhi); | |
81 | h2->SetBranchAddress("P",&fP); | |
82 | h2->SetBranchAddress("E",&fE); | |
83 | } | |
84 | ||
85 | Int_t AliGenReaderCwn::NextEvent() | |
86 | { | |
87 | // Read the next event | |
88 | Int_t nTracks; | |
89 | fNparticle = 0; | |
90 | TFile* pFile = fTreeNtuple->GetCurrentFile(); | |
91 | pFile->cd(); | |
92 | ||
93 | Int_t nentries = (Int_t) fTreeNtuple->GetEntries(); | |
94 | if (fNcurrent < nentries) { | |
f24650c5 | 95 | fNcurrent++; |
96 | ||
97 | Int_t i5=fIhead[4]; | |
98 | Int_t i6=fIhead[5]; | |
99 | if (i5==0) { | |
100 | printf("\n This should never happen !\n"); | |
101 | nTracks = 0; | |
102 | } else { | |
103 | printf("\n Next event contains %d tracks! \n", i6); | |
104 | nTracks = i6; | |
105 | } | |
106 | fNparticleMax = nTracks; | |
107 | return nTracks; | |
f24650c5 | 108 | } |
4facea7f | 109 | |
f24650c5 | 110 | return 0; |
111 | } | |
112 | ||
113 | TParticle* AliGenReaderCwn::NextParticle() | |
114 | { | |
115 | // | |
116 | // | |
117 | Float_t prwn; | |
118 | Float_t p[4]; | |
119 | // Read the next particle | |
120 | if (fCode == kGEANT3) fIdpart=gMC->PDGFromId(fIdpart); | |
121 | Double_t amass = TDatabasePDG::Instance()->GetParticle(fIdpart)->Mass(); | |
122 | if(fE<=amass) { | |
123 | Warning("Generate","Particle %d E = %f mass = %f %f %f \n", | |
124 | fIdpart,fE,amass, fPhi, fTheta); | |
125 | prwn=0; | |
126 | } else { | |
127 | prwn=sqrt((fE+amass)*(fE-amass)); | |
128 | } | |
129 | ||
130 | fTheta *= TMath::Pi()/180.; | |
131 | fPhi = (fPhi-180)*TMath::Pi()/180.; | |
132 | p[0] = prwn*TMath::Sin(fTheta)*TMath::Cos(fPhi); | |
133 | p[1] = prwn*TMath::Sin(fTheta)*TMath::Sin(fPhi); | |
134 | p[2] = prwn*TMath::Cos(fTheta); | |
135 | p[3] = fE; | |
159ec319 | 136 | TParticle* particle = new TParticle(fIdpart, 0, -1, -1, -1, -1, p[0], p[1], p[2], p[3], 0., 0., 0., 0.); |
f24650c5 | 137 | fNcurrent++; |
138 | fNparticle++; | |
139 | return particle; | |
140 | } | |
141 | ||
142 | ||
143 | ||
ae872676 | 144 | AliGenReaderCwn& AliGenReaderCwn::operator=(const AliGenReaderCwn& rhs) |
145 | { | |
146 | // Assignment operator | |
147 | return *this; | |
148 | } | |
f24650c5 | 149 | |
150 | ||
151 |