1 /**************************************************************************
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4 * Author: The ALICE Off-line Project. *
5 * Contributors are mentioned in the code where appropriate. *
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11 * appear in the supporting documentation. The authors make no claims *
12 * about the suitability of this software for any purpose. It is *
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14 **************************************************************************/
19 Revision 1.1 2001/11/09 09:10:46 morsch
20 Realisation of AliGenReader that reads the old cwn event format.
24 // Read the old ALICE event format based on CW-ntuples
25 // http://consult.cern.ch/alice/Internal_Notes/1995/32/abstract
26 // .cwn file have to be converted to .root using h2root
27 // Use SetFileName(file) to read from "file"
28 // Author: andreas.morsch@cern.ch
32 #include <TParticle.h>
34 #include "AliGenReaderCwn.h"
36 ClassImp(AliGenReaderCwn);
39 AliGenReaderCwn::AliGenReaderCwn()
41 // Default constructor
46 AliGenReaderCwn::~AliGenReaderCwn()
51 void AliGenReaderCwn::Init()
54 // reset the existing file environment and open a new root file if
55 // the pointer to the Fluka tree is null
59 pFile = new TFile(fFileName);
61 printf("\n I have opened %s file \n", fFileName);
63 // get the tree address in the Fluka boundary source file
64 fTreeNtuple = (TTree*)gDirectory->Get("h888");
66 TTree *h2=fTreeNtuple;
67 //Set branch addresses
68 h2->SetBranchAddress("Nihead",&fNihead);
69 h2->SetBranchAddress("Ihead",fIhead);
70 h2->SetBranchAddress("Nrhead",&fNrhead);
71 h2->SetBranchAddress("Rhead",fRhead);
72 h2->SetBranchAddress("Idpart",&fIdpart);
73 h2->SetBranchAddress("Theta",&fTheta);
74 h2->SetBranchAddress("Phi",&fPhi);
75 h2->SetBranchAddress("P",&fP);
76 h2->SetBranchAddress("E",&fE);
79 Int_t AliGenReaderCwn::NextEvent()
81 // Read the next event
84 TFile* pFile = fTreeNtuple->GetCurrentFile();
87 Int_t nentries = (Int_t) fTreeNtuple->GetEntries();
88 if (fNcurrent < nentries) {
89 Int_t nb = (Int_t)fTreeNtuple->GetEvent(fNcurrent);
95 printf("\n This should never happen !\n");
98 printf("\n Next event contains %d tracks! \n", i6);
101 fNparticleMax = nTracks;
109 TParticle* AliGenReaderCwn::NextParticle()
115 // Read the next particle
116 if (fCode == kGEANT3) fIdpart=gMC->PDGFromId(fIdpart);
117 Double_t amass = TDatabasePDG::Instance()->GetParticle(fIdpart)->Mass();
119 Warning("Generate","Particle %d E = %f mass = %f %f %f \n",
120 fIdpart,fE,amass, fPhi, fTheta);
123 prwn=sqrt((fE+amass)*(fE-amass));
126 fTheta *= TMath::Pi()/180.;
127 fPhi = (fPhi-180)*TMath::Pi()/180.;
128 p[0] = prwn*TMath::Sin(fTheta)*TMath::Cos(fPhi);
129 p[1] = prwn*TMath::Sin(fTheta)*TMath::Sin(fPhi);
130 p[2] = prwn*TMath::Cos(fTheta);
132 TParticle* particle = new TParticle(fIdpart, 0, -1, -1, -1, -1, p[0], p[1], p[2], p[3],
134 Int_t nb = (Int_t)fTreeNtuple->GetEvent(fNcurrent);
142 AliGenReaderCwn& AliGenReaderCwn::operator=(const AliGenReaderCwn& rhs)
144 // Assignment operator