Correct GetWire check on even/odd fnWires
[u/mrichter/AliRoot.git] / EVGEN / AliGenFLUKAsource.cxx
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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
fe4da5cc 20#include "AliGenFLUKAsource.h"
21#include "AliGenMUONlib.h"
22#include "AliMC.h"
23#include "AliRun.h"
c5970876 24#include "AliPDG.h"
1578254f 25
fe4da5cc 26#include <TDirectory.h>
27#include <TFile.h>
28#include <TTree.h>
29#include <stdlib.h>
30 ClassImp(AliGenFLUKAsource)
31 AliGenFLUKAsource::AliGenFLUKAsource()
32 :AliGenerator(-1)
33{
34 //
35 fName="FLUKA";
36 fTitle="FLUKA Boundary Source";
37 // Read in all particle types by default
38 fIkine=6;
39 // Set maximum admitted age of particles to 1.e-05 by default
40 fAgeMax=1.e-05;
41 // Do not add weight
42 fAddWeight=1.;
43 // Shift the z-coordinate of the impact point by 4.5 cm only if it reads
44 // from specific boundary source to the chamber (fZshift=4.5;),else there
45 // is no need to shift as it reads boundary source for the whole volume of
46 // the Muon Arm; the default value corresponds to boundary source for the
47 // whole volume of the MUON Arm
48 fZshift=0;
49 // Set the default file
50 fFileName="flukasource.root";
51
52 fTreeFluka=0;
53//
54// Read all particles
55 fNpart=-1;
56
57}
58
59AliGenFLUKAsource::AliGenFLUKAsource(Int_t npart)
60 :AliGenerator(npart)
61{
62 //
63 fName="FLUKA";
64 fTitle="FLUKA Boundary Source";
65 // Read in all particle types by default
66 fIkine=6;
67 // Set maximum admitted age of particles to 1.e-05 by default
68 fAgeMax=1.e-05;
69 // Do not add weight
70 fAddWeight=1.;
71 // Shift the z-coordinate of the impact point by 4.5 cm only if it reads
72 // from specific boundary source to the chamber (fZshift=4.5;),else there
73 // is no need to shift as it reads boundary source for the whole volume of
74 // the Muon Arm; the default value corresponds to boundary source for the
75 // whole volume of the MUON Arm
76 fZshift=0;
77 // Set the default file
78 fFileName="flukasource.root";
79
80 fTreeFluka=0;
81
82}
83
84//____________________________________________________________
85AliGenFLUKAsource::~AliGenFLUKAsource()
86{
87 delete fTreeFluka;
88}
89
90//____________________________________________________________
91void AliGenFLUKAsource::FlukaInit()
92{
93//
94// reset the existing file environment and open a new root file if
95// the pointer to the Fluka tree is null
96
97 TFile *File=0;
98 if (fTreeFluka==0) {
99 if (!File) {
100 File = new TFile(fFileName);
101 File->cd();
102 cout<<"I have opened "<<fFileName<<" file "<<endl;
103 }
104// get the tree address in the Fluka boundary source file
105 fTreeFluka = (TTree*)gDirectory->Get("h1");
106 } else {
107 File = fTreeFluka->GetCurrentFile();
108 File->cd();
109 }
110
111 TTree *h2=fTreeFluka;
112//Set branch addresses
113 h2->SetBranchAddress("Ip",&Ip);
114 h2->SetBranchAddress("Ipp",&Ipp);
115 h2->SetBranchAddress("Xi",&Xi);
116 h2->SetBranchAddress("Yi",&Yi);
117 h2->SetBranchAddress("Zi",&Zi);
118 h2->SetBranchAddress("Px",&Px);
119 h2->SetBranchAddress("Py",&Py);
120 h2->SetBranchAddress("Pz",&Pz);
121 h2->SetBranchAddress("Ekin",&Ekin);
122 h2->SetBranchAddress("Zv",&Zv);
123 h2->SetBranchAddress("Rv",&Rv);
124 h2->SetBranchAddress("Itra",&Itra);
125 h2->SetBranchAddress("Igas",&Igas);
126 h2->SetBranchAddress("Wgt",&Wgt);
127 h2->SetBranchAddress("Etag",&Etag);
128 h2->SetBranchAddress("Ptg",&Ptg);
129 h2->SetBranchAddress("Age",&Age);
130}
131
132//____________________________________________________________
133void AliGenFLUKAsource::Generate()
134{
135
1578254f 136 const Int_t ifluge[28]={kProton, kProtonBar, kElectron, kPositron,
137 kNuE, kNuEBar, kGamma, kNeutron, kNeutronBar,
138 kMuonPlus, kMuonMinus, kK0Long , kPiPlus, kPiMinus,
139 kKPlus, kKMinus, kLambda0, kLambda0Bar, kK0Short,
140 kSigmaMinus, kSigmaPlus, kSigma0, kPi0, kK0, kK0Bar,
141 0,kNuMu,kNuMuBar};
fe4da5cc 142 Float_t polar[3]= {0,0,0};
143 //
144 Float_t origin[3];
145 Float_t p[3];
146 Float_t prwn;
147 Float_t wgt, fwgt;
148 Float_t phi;
149 char name[100];
150 Float_t amass, charge, tlife;
151 Int_t itrtyp;
152 Int_t iwgt;
153 Int_t i, j, part, nt;
154 static Int_t irwn;
155 //
156 Float_t random[2];
157 //
158 FlukaInit();
159 TTree *h2=fTreeFluka;
160 Int_t nentries = (Int_t) h2->GetEntries();
299e476a 161 if (fNpart == -1) fNpart=Int_t(nentries*fFrac);
fe4da5cc 162
163 // loop over number of particles
164 Int_t nb=0;
165 for (i=0; i<fNpart;i++) {
cfce8870 166 Int_t ev=gMC->CurrentEvent();
fe4da5cc 167 Int_t entry=fNpart*(ev-1)+i;
168 nb = (Int_t)h2->GetEvent(entry);
169 if (irwn > nentries) {
170 printf("No more entries in the FLUKA boundary source file\n");
299e476a 171 TFile *File=0;
172 // Get AliRun object or create it
173 if (!gAlice) {
174 gAlice = (AliRun*)File->Get("gAlice");
175 if (gAlice) printf("AliRun object found on file\n");
176 if (!gAlice) gAlice = new AliRun("gAlice","Alice test program");
177 }
178 TTree *fAli=gAlice->TreeK();
179 if (fAli) File =fAli->GetCurrentFile();
180 File->cd();
181 printf("Generate - I'm out \n");
fe4da5cc 182 return;
183 }
184 if (Ip > 28 || Ip < 0) {
185 irwn++;
186 continue;
187 }
188
189 if ((Ip != fIkine && fIkine != 6 && fIkine != 9) || Age > fAgeMax){
190 irwn++;
191 continue;
192 } else if (fIkine == 9) {
193 if (Ip == 7 || Ip == 8 || Age > fAgeMax) {
194 irwn++;
195 continue;
196 }
197 }
198
199
200 irwn++;
201 printf("\n Particle type: %f \n \n ", Ip);
202
203 if (Ip ==7){
204 prwn=Ekin;
205 part=1;
206 } else if (Ip == 8) {
207 prwn=sqrt(Ekin*Ekin + 2.*0.93956563);
208 part=13;
209 } else {
210 part=ifluge[int(Ip)-1];
cfce8870 211 gMC->Gfpart(part, name, itrtyp,
fe4da5cc 212 amass, charge, tlife);
213 prwn=sqrt(Ekin*Ekin + 2.*amass);
214 }
215 origin[0]=Xi;
216 origin[1]=Yi;
217 origin[2]=Zi;
218
219 p[0]=Px*prwn;
220 p[1]=Py*prwn;
221 p[2]=Pz*prwn;
222
223 //handle particle weight correctly
224 wgt = (part == 13) ? Wgt*fAddWeight : Wgt;
225 iwgt=Int_t(wgt);
226 fwgt=wgt-Float_t(iwgt);
cfce8870 227 gMC->Rndm(random,2);
fe4da5cc 228 if (random[0] < fwgt) iwgt++;
229 if (part==1 && iwgt>100) iwgt=100;
230 Int_t nstack=0;
231 for (j=0; j<iwgt; j++) {
232 gAlice->SetTrack(1,-1,part,p,origin,polar,0,"Primary",nt);
cfce8870 233 gMC->Rndm(random,2);
fe4da5cc 234 phi=2*random[1]*TMath::Pi();
235 Float_t pn1=p[0]*TMath::Sin(phi) - p[1]*TMath::Cos(phi);
236 Float_t pn2=p[0]*TMath::Cos(phi) + p[1]*TMath::Sin(phi);
237 p[0]=pn1;
238 p[1]=pn2;
239 Float_t on1=origin[0]*TMath::Sin(phi)-origin[1]*TMath::Cos(phi);
240 Float_t on2=origin[0]*TMath::Cos(phi)+origin[1]*TMath::Sin(phi);
241 origin[0]=on1;
242 origin[1]=on2;
243 nstack++;
244 }
245 if (nstack == 0) continue;
246 }
247
248 TFile *File=0;
249// Get AliRun object or create it
250 if (!gAlice) {
251 gAlice = (AliRun*)File->Get("gAlice");
252 if (gAlice) printf("AliRun object found on file\n");
253 if (!gAlice) gAlice = new AliRun("gAlice","Alice test program");
254 }
255 TTree *fAli=gAlice->TreeK();
256 if (fAli) File =fAli->GetCurrentFile();
257 File->cd();
258}
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