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4c039060 | 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 | $Log$ | |
18 | */ | |
19 | ||
693caace | 20 | #include "AliGenExtFile.h" |
21 | #include "AliGenMUONlib.h" | |
22 | #include "AliMC.h" | |
23 | #include "AliRun.h" | |
24 | #include <TDirectory.h> | |
25 | #include <TFile.h> | |
26 | #include <TTree.h> | |
27 | #include <stdlib.h> | |
28 | ClassImp(AliGenExtFile) | |
29 | AliGenExtFile::AliGenExtFile() | |
30 | :AliGenerator(-1) | |
31 | { | |
32 | // | |
33 | fName="ExtFile"; | |
34 | fTitle="Primaries from ext. File"; | |
35 | fFileName="dtujet93.root"; | |
36 | fTreeNtuple=0; | |
37 | fNcurrent=0; | |
38 | // | |
39 | // Read all particles | |
40 | fNpart=-1; | |
41 | } | |
42 | ||
43 | AliGenExtFile::AliGenExtFile(Int_t npart) | |
44 | :AliGenerator(npart) | |
45 | { | |
46 | // | |
47 | fName="ExtFile"; | |
48 | fTitle="Primaries from ext. File"; | |
49 | fFileName="dtujet93.root"; | |
50 | fTreeNtuple=0; | |
51 | fNcurrent=0; | |
52 | } | |
53 | ||
54 | //____________________________________________________________ | |
55 | AliGenExtFile::~AliGenExtFile() | |
56 | { | |
57 | delete fTreeNtuple; | |
58 | } | |
59 | ||
60 | //____________________________________________________________ | |
61 | void AliGenExtFile::NtupleInit() | |
62 | { | |
63 | // | |
64 | // reset the existing file environment and open a new root file if | |
65 | // the pointer to the Fluka tree is null | |
66 | ||
67 | TFile *File=0; | |
68 | if (fTreeNtuple==0) { | |
69 | if (!File) { | |
70 | File = new TFile(fFileName); | |
71 | File->cd(); | |
72 | cout<<"I have opened "<<fFileName<<" file "<<endl; | |
73 | } | |
74 | // get the tree address in the Fluka boundary source file | |
75 | fTreeNtuple = (TTree*)gDirectory->Get("h888"); | |
76 | } else { | |
77 | File = fTreeNtuple->GetCurrentFile(); | |
78 | File->cd(); | |
79 | } | |
80 | ||
81 | TTree *h2=fTreeNtuple; | |
82 | //Set branch addresses | |
83 | //Set branch addresses | |
84 | h2->SetBranchAddress("Nihead",&Nihead); | |
85 | h2->SetBranchAddress("Ihead",Ihead); | |
86 | h2->SetBranchAddress("Nrhead",&Nrhead); | |
87 | h2->SetBranchAddress("Rhead",Rhead); | |
88 | h2->SetBranchAddress("Idpart",&Idpart); | |
89 | h2->SetBranchAddress("Theta",&Theta); | |
90 | h2->SetBranchAddress("Phi",&Phi); | |
91 | h2->SetBranchAddress("P",&P); | |
92 | h2->SetBranchAddress("E",&E); | |
93 | } | |
94 | ||
95 | ||
96 | //____________________________________________________________ | |
97 | void AliGenExtFile::Generate() | |
98 | { | |
99 | ||
693caace | 100 | Float_t polar[3]= {0,0,0}; |
101 | // | |
102 | Float_t origin[3]={0,0,0}; | |
103 | Float_t p[3]; | |
104 | Float_t random[6]; | |
105 | Float_t prwn; | |
9b153ba2 | 106 | Int_t i, j, nt, Ntracks=0; |
693caace | 107 | // |
108 | NtupleInit(); | |
109 | TTree *h2=fTreeNtuple; | |
110 | Int_t nentries = (Int_t) h2->GetEntries(); | |
111 | // loop over number of particles | |
112 | Int_t nb = (Int_t)h2->GetEvent(fNcurrent); | |
113 | Int_t i5=Ihead[4]; | |
114 | Int_t i6=Ihead[5]; | |
115 | ||
116 | for (j=0;j<3;j++) origin[j]=fOrigin[j]; | |
117 | if(fVertexSmear==perEvent) { | |
cfce8870 | 118 | gMC->Rndm(random,6); |
693caace | 119 | for (j=0;j<3;j++) { |
120 | origin[j]+=fOsigma[j]*TMath::Cos(2*random[2*j]*TMath::Pi())* | |
121 | TMath::Sqrt(-2*TMath::Log(random[2*j+1])); | |
122 | } | |
123 | } | |
124 | ||
125 | if (fNcurrent >= nentries) { | |
126 | printf("\n No more entries !!! !\n"); | |
127 | return; | |
128 | } | |
129 | ||
130 | ||
131 | if (i5==0) { | |
132 | printf("\n This should never happen !\n"); | |
133 | } else { | |
134 | printf("\n Next event contains %d tracks! \n", i6); | |
135 | Ntracks=i6; | |
136 | } | |
137 | for (i=0; i<Ntracks; i++) { | |
138 | ||
c7a01d5a | 139 | Double_t amass = TDatabasePDG::Instance()->GetParticle(Idpart)->Mass(); |
140 | if(E<=amass) { | |
141 | Warning("Generate","Particle %d no %d E = %f mass = %f\n",Idpart,i,E,amass); | |
142 | prwn=0; | |
143 | } else { | |
144 | prwn=sqrt((E+amass)*(E-amass)); | |
145 | } | |
693caace | 146 | |
147 | Theta *= TMath::Pi()/180.; | |
148 | Phi = (Phi-180)*TMath::Pi()/180.; | |
149 | if(Theta<fThetaMin || Theta>fThetaMax || | |
150 | Phi<fPhiMin || Phi>fPhiMax || | |
151 | prwn<fPMin || prwn>fPMax) | |
152 | { | |
153 | ; | |
154 | } else { | |
155 | p[0]=prwn*TMath::Sin(Theta)*TMath::Cos(Phi); | |
156 | p[1]=prwn*TMath::Sin(Theta)*TMath::Sin(Phi); | |
157 | p[2]=prwn*TMath::Cos(Theta); | |
158 | ||
159 | if(fVertexSmear==perTrack) { | |
cfce8870 | 160 | gMC->Rndm(random,6); |
693caace | 161 | for (j=0;j<3;j++) { |
162 | origin[j]=fOrigin[j] | |
163 | +fOsigma[j]*TMath::Cos(2*random[2*j]*TMath::Pi())* | |
164 | TMath::Sqrt(-2*TMath::Log(random[2*j+1])); | |
165 | } | |
166 | } | |
167 | gAlice->SetTrack(fTrackIt,-1,Idpart,p,origin,polar,0,"Primary",nt); | |
168 | } | |
169 | fNcurrent++; | |
170 | nb = (Int_t)h2->GetEvent(fNcurrent); | |
171 | } | |
172 | ||
173 | TFile *File=0; | |
174 | // Get AliRun object or create it | |
175 | if (!gAlice) { | |
176 | gAlice = (AliRun*)File->Get("gAlice"); | |
177 | if (gAlice) printf("AliRun object found on file\n"); | |
178 | if (!gAlice) gAlice = new AliRun("gAlice","Alice test program"); | |
179 | } | |
180 | TTree *fAli=gAlice->TreeK(); | |
181 | if (fAli) File =fAli->GetCurrentFile(); | |
182 | File->cd(); | |
183 | } | |
184 | ||
185 | ||
186 | ||
187 | ||
188 | ||
189 | ||
190 | ||
191 | ||
192 |