correct the trigger name for PbPb
[u/mrichter/AliRoot.git] / EVGEN / AliGenReaderCwn.cxx
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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
88cb7938 17/* $Id$ */
f24650c5 18
19// Read the old ALICE event format based on CW-ntuples
20// http://consult.cern.ch/alice/Internal_Notes/1995/32/abstract
21// .cwn file have to be converted to .root using h2root
22// Use SetFileName(file) to read from "file"
23// Author: andreas.morsch@cern.ch
24
25#include <TFile.h>
f24650c5 26#include <TParticle.h>
c180f65d 27#include <TDatabasePDG.h>
88cb7938 28#include <TTree.h>
acc86a24 29#include <TVirtualMC.h>
f24650c5 30
31#include "AliGenReaderCwn.h"
88cb7938 32
706938e6 33ClassImp(AliGenReaderCwn)
f24650c5 34
1c56e311 35AliGenReaderCwn::AliGenReaderCwn():
36 fNcurrent(0),
37 fNparticle(0),
38 fNparticleMax(0),
39 fTreeNtuple(0),
40 fNihead(0),
41 fNrhead(0),
42 fIdpart(0),
43 fTheta(0.),
44 fPhi(0.),
45 fP(0.),
46 fE(0.)
f24650c5 47{
48// Default constructor
f24650c5 49}
50
1c56e311 51AliGenReaderCwn::AliGenReaderCwn(const AliGenReaderCwn &reader):
52 AliGenReader(reader),
53 fNcurrent(0),
54 fNparticle(0),
55 fNparticleMax(0),
56 fTreeNtuple(0),
57 fNihead(0),
58 fNrhead(0),
59 fIdpart(0),
60 fTheta(0.),
61 fPhi(0.),
62 fP(0.),
63 fE(0.)
64{
65 // Copy constructor
66 reader.Copy(*this);
67}
68
69
ae872676 70AliGenReaderCwn::~AliGenReaderCwn()
71{
72 delete fTreeNtuple;
73}
74
f24650c5 75void AliGenReaderCwn::Init()
76{
77//
78// reset the existing file environment and open a new root file if
79// the pointer to the Fluka tree is null
80
81 TFile *pFile=0;
82 if (!pFile) {
83 pFile = new TFile(fFileName);
84 pFile->cd();
85 printf("\n I have opened %s file \n", fFileName);
86 }
87// get the tree address in the Fluka boundary source file
88 fTreeNtuple = (TTree*)gDirectory->Get("h888");
89
90 TTree *h2=fTreeNtuple;
91//Set branch addresses
92 h2->SetBranchAddress("Nihead",&fNihead);
93 h2->SetBranchAddress("Ihead",fIhead);
94 h2->SetBranchAddress("Nrhead",&fNrhead);
95 h2->SetBranchAddress("Rhead",fRhead);
96 h2->SetBranchAddress("Idpart",&fIdpart);
97 h2->SetBranchAddress("Theta",&fTheta);
98 h2->SetBranchAddress("Phi",&fPhi);
99 h2->SetBranchAddress("P",&fP);
100 h2->SetBranchAddress("E",&fE);
101}
102
103Int_t AliGenReaderCwn::NextEvent()
104{
105// Read the next event
106 Int_t nTracks;
107 fNparticle = 0;
108 TFile* pFile = fTreeNtuple->GetCurrentFile();
109 pFile->cd();
110
111 Int_t nentries = (Int_t) fTreeNtuple->GetEntries();
112 if (fNcurrent < nentries) {
f24650c5 113 fNcurrent++;
114
115 Int_t i5=fIhead[4];
116 Int_t i6=fIhead[5];
117 if (i5==0) {
118 printf("\n This should never happen !\n");
119 nTracks = 0;
120 } else {
121 printf("\n Next event contains %d tracks! \n", i6);
122 nTracks = i6;
123 }
124 fNparticleMax = nTracks;
125 return nTracks;
f24650c5 126 }
4facea7f 127
f24650c5 128 return 0;
129}
130
131TParticle* AliGenReaderCwn::NextParticle()
132{
4a33c50d 133// Read next particle
f24650c5 134//
135 Float_t prwn;
136 Float_t p[4];
137// Read the next particle
138 if (fCode == kGEANT3) fIdpart=gMC->PDGFromId(fIdpart);
139 Double_t amass = TDatabasePDG::Instance()->GetParticle(fIdpart)->Mass();
140 if(fE<=amass) {
141 Warning("Generate","Particle %d E = %f mass = %f %f %f \n",
142 fIdpart,fE,amass, fPhi, fTheta);
143 prwn=0;
144 } else {
145 prwn=sqrt((fE+amass)*(fE-amass));
146 }
147
148 fTheta *= TMath::Pi()/180.;
149 fPhi = (fPhi-180)*TMath::Pi()/180.;
150 p[0] = prwn*TMath::Sin(fTheta)*TMath::Cos(fPhi);
151 p[1] = prwn*TMath::Sin(fTheta)*TMath::Sin(fPhi);
152 p[2] = prwn*TMath::Cos(fTheta);
153 p[3] = fE;
159ec319 154 TParticle* particle = new TParticle(fIdpart, 0, -1, -1, -1, -1, p[0], p[1], p[2], p[3], 0., 0., 0., 0.);
f24650c5 155 fNcurrent++;
156 fNparticle++;
157 return particle;
158}
159
160
161
ae872676 162AliGenReaderCwn& AliGenReaderCwn::operator=(const AliGenReaderCwn& rhs)
163{
164// Assignment operator
198bb1c7 165 rhs.Copy(*this);
ae872676 166 return *this;
167}
f24650c5 168
dc1d768c 169void AliGenReaderCwn::Copy(TObject&) const
198bb1c7 170{
171 //
172 // Copy
173 //
174 Fatal("Copy","Not implemented!\n");
175}
176
177
f24650c5 178
179