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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 | $Log$ | |
f87cfe57 | 18 | Revision 1.7 2000/02/16 14:56:27 morsch |
19 | Convert geant particle code into pdg code before putting particle on the stack. | |
20 | ||
3c8636e9 | 21 | Revision 1.6 1999/11/09 07:38:48 fca |
22 | Changes for compatibility with version 2.23 of ROOT | |
23 | ||
084c1b4a | 24 | Revision 1.5 1999/09/29 09:24:12 fca |
25 | Introduction of the Copyright and cvs Log | |
26 | ||
4c039060 | 27 | */ |
28 | ||
084c1b4a | 29 | #include <iostream.h> |
30 | ||
693caace | 31 | #include "AliGenExtFile.h" |
32 | #include "AliGenMUONlib.h" | |
33 | #include "AliMC.h" | |
34 | #include "AliRun.h" | |
35 | #include <TDirectory.h> | |
36 | #include <TFile.h> | |
37 | #include <TTree.h> | |
38 | #include <stdlib.h> | |
39 | ClassImp(AliGenExtFile) | |
40 | AliGenExtFile::AliGenExtFile() | |
41 | :AliGenerator(-1) | |
42 | { | |
f87cfe57 | 43 | // Constructor |
693caace | 44 | fName="ExtFile"; |
45 | fTitle="Primaries from ext. File"; | |
46 | fFileName="dtujet93.root"; | |
47 | fTreeNtuple=0; | |
48 | fNcurrent=0; | |
49 | // | |
50 | // Read all particles | |
51 | fNpart=-1; | |
52 | } | |
53 | ||
54 | AliGenExtFile::AliGenExtFile(Int_t npart) | |
55 | :AliGenerator(npart) | |
56 | { | |
f87cfe57 | 57 | // Constructor |
693caace | 58 | fName="ExtFile"; |
59 | fTitle="Primaries from ext. File"; | |
60 | fFileName="dtujet93.root"; | |
61 | fTreeNtuple=0; | |
62 | fNcurrent=0; | |
63 | } | |
64 | ||
f87cfe57 | 65 | AliGenExtFile::AliGenExtFile(const AliGenExtFile & ExtFile) |
66 | { | |
67 | // copy constructor | |
68 | } | |
693caace | 69 | //____________________________________________________________ |
70 | AliGenExtFile::~AliGenExtFile() | |
71 | { | |
f87cfe57 | 72 | // Destructor |
693caace | 73 | delete fTreeNtuple; |
74 | } | |
75 | ||
76 | //____________________________________________________________ | |
77 | void AliGenExtFile::NtupleInit() | |
78 | { | |
79 | // | |
80 | // reset the existing file environment and open a new root file if | |
81 | // the pointer to the Fluka tree is null | |
82 | ||
f87cfe57 | 83 | TFile *pFile=0; |
693caace | 84 | if (fTreeNtuple==0) { |
f87cfe57 | 85 | if (!pFile) { |
86 | pFile = new TFile(fFileName); | |
87 | pFile->cd(); | |
693caace | 88 | cout<<"I have opened "<<fFileName<<" file "<<endl; |
89 | } | |
90 | // get the tree address in the Fluka boundary source file | |
91 | fTreeNtuple = (TTree*)gDirectory->Get("h888"); | |
92 | } else { | |
f87cfe57 | 93 | pFile = fTreeNtuple->GetCurrentFile(); |
94 | pFile->cd(); | |
693caace | 95 | } |
96 | ||
97 | TTree *h2=fTreeNtuple; | |
98 | //Set branch addresses | |
99 | //Set branch addresses | |
f87cfe57 | 100 | h2->SetBranchAddress("Nihead",&fNihead); |
101 | h2->SetBranchAddress("Ihead",fIhead); | |
102 | h2->SetBranchAddress("Nrhead",&fNrhead); | |
103 | h2->SetBranchAddress("Rhead",fRhead); | |
104 | h2->SetBranchAddress("Idpart",&fIdpart); | |
105 | h2->SetBranchAddress("Theta",&fTheta); | |
106 | h2->SetBranchAddress("Phi",&fPhi); | |
107 | h2->SetBranchAddress("P",&fP); | |
108 | h2->SetBranchAddress("E",&fE); | |
693caace | 109 | } |
110 | ||
111 | ||
112 | //____________________________________________________________ | |
113 | void AliGenExtFile::Generate() | |
114 | { | |
f87cfe57 | 115 | // Generate particles |
693caace | 116 | |
693caace | 117 | Float_t polar[3]= {0,0,0}; |
118 | // | |
119 | Float_t origin[3]={0,0,0}; | |
120 | Float_t p[3]; | |
121 | Float_t random[6]; | |
122 | Float_t prwn; | |
f87cfe57 | 123 | Int_t i, j, nt, nTracks=0; |
693caace | 124 | // |
125 | NtupleInit(); | |
126 | TTree *h2=fTreeNtuple; | |
127 | Int_t nentries = (Int_t) h2->GetEntries(); | |
128 | // loop over number of particles | |
129 | Int_t nb = (Int_t)h2->GetEvent(fNcurrent); | |
f87cfe57 | 130 | Int_t i5=fIhead[4]; |
131 | Int_t i6=fIhead[5]; | |
693caace | 132 | |
133 | for (j=0;j<3;j++) origin[j]=fOrigin[j]; | |
134 | if(fVertexSmear==perEvent) { | |
cfce8870 | 135 | gMC->Rndm(random,6); |
693caace | 136 | for (j=0;j<3;j++) { |
137 | origin[j]+=fOsigma[j]*TMath::Cos(2*random[2*j]*TMath::Pi())* | |
138 | TMath::Sqrt(-2*TMath::Log(random[2*j+1])); | |
139 | } | |
140 | } | |
141 | ||
142 | if (fNcurrent >= nentries) { | |
143 | printf("\n No more entries !!! !\n"); | |
144 | return; | |
145 | } | |
146 | ||
147 | ||
148 | if (i5==0) { | |
149 | printf("\n This should never happen !\n"); | |
150 | } else { | |
151 | printf("\n Next event contains %d tracks! \n", i6); | |
f87cfe57 | 152 | nTracks=i6; |
693caace | 153 | } |
f87cfe57 | 154 | for (i=0; i<nTracks; i++) { |
155 | fIdpart=gMC->PDGFromId(fIdpart); | |
156 | Double_t amass = TDatabasePDG::Instance()->GetParticle(fIdpart)->Mass(); | |
157 | if(fE<=amass) { | |
3c8636e9 | 158 | Warning("Generate","Particle %d no %d E = %f mass = %f\n", |
f87cfe57 | 159 | fIdpart,i,fE,amass); |
c7a01d5a | 160 | prwn=0; |
161 | } else { | |
f87cfe57 | 162 | prwn=sqrt((fE+amass)*(fE-amass)); |
c7a01d5a | 163 | } |
693caace | 164 | |
f87cfe57 | 165 | fTheta *= TMath::Pi()/180.; |
166 | fPhi = (fPhi-180)*TMath::Pi()/180.; | |
167 | if(fTheta<fThetaMin || fTheta>fThetaMax || | |
168 | fPhi<fPhiMin || fPhi>fPhiMax || | |
693caace | 169 | prwn<fPMin || prwn>fPMax) |
170 | { | |
171 | ; | |
172 | } else { | |
f87cfe57 | 173 | p[0]=prwn*TMath::Sin(fTheta)*TMath::Cos(fPhi); |
174 | p[1]=prwn*TMath::Sin(fTheta)*TMath::Sin(fPhi); | |
175 | p[2]=prwn*TMath::Cos(fTheta); | |
693caace | 176 | |
177 | if(fVertexSmear==perTrack) { | |
cfce8870 | 178 | gMC->Rndm(random,6); |
693caace | 179 | for (j=0;j<3;j++) { |
180 | origin[j]=fOrigin[j] | |
181 | +fOsigma[j]*TMath::Cos(2*random[2*j]*TMath::Pi())* | |
182 | TMath::Sqrt(-2*TMath::Log(random[2*j+1])); | |
183 | } | |
184 | } | |
f87cfe57 | 185 | gAlice->SetTrack(fTrackIt,-1,fIdpart,p,origin,polar,0,"Primary",nt); |
693caace | 186 | } |
187 | fNcurrent++; | |
188 | nb = (Int_t)h2->GetEvent(fNcurrent); | |
189 | } | |
190 | ||
f87cfe57 | 191 | TFile *pFile=0; |
693caace | 192 | // Get AliRun object or create it |
193 | if (!gAlice) { | |
f87cfe57 | 194 | gAlice = (AliRun*)pFile->Get("gAlice"); |
693caace | 195 | if (gAlice) printf("AliRun object found on file\n"); |
196 | if (!gAlice) gAlice = new AliRun("gAlice","Alice test program"); | |
197 | } | |
198 | TTree *fAli=gAlice->TreeK(); | |
f87cfe57 | 199 | if (fAli) pFile =fAli->GetCurrentFile(); |
200 | pFile->cd(); | |
693caace | 201 | } |
202 | ||
203 | ||
f87cfe57 | 204 | AliGenExtFile& AliGenExtFile::operator=(const AliGenExtFile& rhs) |
205 | { | |
206 | // Assignment operator | |
207 | return *this; | |
208 | } | |
209 | ||
693caace | 210 | |
211 | ||
212 | ||
213 | ||
214 | ||
215 | ||
216 |