Interference with other detectors removed: read/fill only our branches
[u/mrichter/AliRoot.git] / PHOS / AliPHOSSDigitizer.cxx
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990119d6 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/* $Id$ */
17
18//_________________________________________________________________________
7acf6008 19// This is a TTask that makes SDigits out of Hits
20// A Summable Digits is the sum of all hits originating
21// from one primary in one active cell
22// A threshold for assignment of the primary to SDigit is applied
23// SDigits are written to TreeS, branch "PHOS"
24// AliPHOSSDigitizer with all current parameters is written
25// to TreeS branch "AliPHOSSDigitizer".
f035f6ce 26// Both branches have the same title. If necessary one can produce
27// another set of SDigits with different parameters. Two versions
28// can be distunguished using titles of the branches.
29// User case:
30// root [0] AliPHOSSDigitizer * s = new AliPHOSSDigitizer("galice.root")
31// Warning in <TDatabasePDG::TDatabasePDG>: object already instantiated
32// root [1] s->ExecuteTask()
33// // Makes SDigitis for all events stored in galice.root
34// root [2] s->SetPedestalParameter(0.001)
35// // One can change parameters of digitization
36// root [3] s->SetSDigitsBranch("Redestal 0.001")
37// // and write them into the new branch
38// root [4] s->ExeciteTask("deb all tim")
39// // available parameters:
40// deb - print # of produced SDigitis
41// deb all - print # and list of produced SDigits
42// tim - print benchmarking information
990119d6 43//
44//*-- Author : Dmitri Peressounko (SUBATECH & KI)
45//////////////////////////////////////////////////////////////////////////////
46
f035f6ce 47
990119d6 48// --- ROOT system ---
7acf6008 49#include "TFile.h"
990119d6 50#include "TTask.h"
51#include "TTree.h"
52#include "TSystem.h"
7acf6008 53#include "TROOT.h"
54#include "TFolder.h"
55#include "TBenchmark.h"
990119d6 56// --- Standard library ---
7acf6008 57#include <iomanip.h>
990119d6 58
59// --- AliRoot header files ---
7acf6008 60#include "AliRun.h"
990119d6 61#include "AliPHOSDigit.h"
62#include "AliPHOSHit.h"
990119d6 63#include "AliPHOSSDigitizer.h"
64
990119d6 65
66ClassImp(AliPHOSSDigitizer)
67
68
69//____________________________________________________________________________
70 AliPHOSSDigitizer::AliPHOSSDigitizer():TTask("AliPHOSSDigitizer","")
71{
72 // ctor
73 fA = 0;
74 fB = 10000000. ;
75 fPrimThreshold = 0.01 ;
7acf6008 76 fNevents = 0 ;
77 fSDigits = 0 ;
78 fHits = 0 ;
79 fIsInitialized = kFALSE ;
990119d6 80
81}
7acf6008 82
990119d6 83//____________________________________________________________________________
7acf6008 84AliPHOSSDigitizer::AliPHOSSDigitizer(const char* headerFile, const char *sDigitsTitle):TTask("AliPHOSSDigitizer","")
990119d6 85{
86 // ctor
87 fA = 0;
88 fB = 10000000.;
89 fPrimThreshold = 0.01 ;
7acf6008 90 fNevents = 0 ;
91 fSDigitsTitle = sDigitsTitle ;
92 fHeadersFile = headerFile ;
93 fSDigits = new TClonesArray("AliPHOSDigit",1000);
94 fHits = new TClonesArray("AliPHOSHit",1000);
95
96 TFile * file = (TFile*) gROOT->GetFile(fHeadersFile.Data() ) ;
97
98 //File was not opened yet
99 if(file == 0){
f035f6ce 100 if(fHeadersFile.Contains("rfio"))
101 file = TFile::Open(fHeadersFile,"update") ;
102 else
103 file = new TFile(fHeadersFile.Data(),"update") ;
7acf6008 104 gAlice = (AliRun *) file->Get("gAlice") ;
105 }
106
990119d6 107 //add Task to //root/Tasks folder
108 TTask * roottasks = (TTask*)gROOT->GetRootFolder()->FindObject("Tasks") ;
109 roottasks->Add(this) ;
7acf6008 110
111 fIsInitialized = kTRUE ;
990119d6 112}
113
114//____________________________________________________________________________
7acf6008 115AliPHOSSDigitizer::~AliPHOSSDigitizer()
990119d6 116{
117 // dtor
7acf6008 118 if(fSDigits)
119 delete fSDigits ;
120 if(fHits)
121 delete fHits ;
990119d6 122}
7acf6008 123//____________________________________________________________________________
124void AliPHOSSDigitizer::Init(){
125 //Initialization can not be done in the default constructor
126
127 if(!fIsInitialized){
990119d6 128
7acf6008 129 if(fHeadersFile.IsNull())
130 fHeadersFile="galice.root" ;
990119d6 131
7acf6008 132 TFile * file = (TFile*) gROOT->GetFile(fHeadersFile.Data() ) ;
133
134 //if file was not opened yet, read gAlice
135 if(file == 0){
136 file = new TFile(fHeadersFile.Data(),"update") ;
137 gAlice = (AliRun *) file->Get("gAlice") ;
138 }
139
140 fHits = new TClonesArray("AliPHOSHit",1000);
141 fSDigits = new TClonesArray("AliPHOSDigit",1000);
142
143 // add Task to //root/Tasks folder
144 TTask * roottasks = (TTask*)gROOT->GetRootFolder()->FindObject("Tasks") ;
145 roottasks->Add(this) ;
146
147 fIsInitialized = kTRUE ;
148 }
149}
990119d6 150//____________________________________________________________________________
151void AliPHOSSDigitizer::Exec(Option_t *option) {
152 //Collects all hits in the same active volume into digit
990119d6 153
7acf6008 154 if(!fIsInitialized)
155 Init() ;
990119d6 156
7acf6008 157 if(strstr(option,"tim"))
158 gBenchmark->Start("PHOSSDigitizer");
990119d6 159
7acf6008 160 fNevents = (Int_t) gAlice->TreeE()->GetEntries() ;
990119d6 161
162 Int_t ievent ;
163 for(ievent = 0; ievent < fNevents; ievent++){
164 gAlice->GetEvent(ievent) ;
165 gAlice->SetEvent(ievent) ;
166
167 if(gAlice->TreeH()==0){
168 cout << "AliPHOSSDigitizer: There is no Hit Tree" << endl;
169 return ;
170 }
171
7acf6008 172 //set address of the hits
173 TBranch * branch = gAlice->TreeH()->GetBranch("PHOS");
174 if (branch)
175 branch->SetAddress(&fHits);
176 else{
177 cout << "ERROR in AliPHOSSDigitizer: "<< endl ;
178 cout << " no branch PHOS in TreeH"<< endl ;
179 cout << " do nothing " << endl ;
180 return ;
181 }
990119d6 182
7acf6008 183 fSDigits->Clear();
990119d6 184 Int_t nSdigits = 0 ;
185
990119d6 186
7acf6008 187 //Now made SDigits from hits, for PHOS it is the same, so just copy
990119d6 188 Int_t itrack ;
077397f6 189 for (itrack=0; itrack < gAlice->GetNtrack(); itrack++){
990119d6 190
077397f6 191 //=========== Get the PHOS branch from Hits Tree for the Primary track itrack
192 branch->GetEntry(itrack,0);
990119d6 193
194 Int_t i;
7acf6008 195 for ( i = 0 ; i < fHits->GetEntries() ; i++ ) {
196 AliPHOSHit * hit = (AliPHOSHit*)fHits->At(i) ;
990119d6 197
198 // Assign primary number only if contribution is significant
199 if( hit->GetEnergy() > fPrimThreshold)
077397f6 200 new((*fSDigits)[nSdigits]) AliPHOSDigit( hit->GetPrimary(), hit->GetId(), Digitize( hit->GetEnergy() ) ) ;
990119d6 201 else
077397f6 202 new((*fSDigits)[nSdigits]) AliPHOSDigit( -1 , hit->GetId(), Digitize( hit->GetEnergy() ) ) ;
990119d6 203
990119d6 204 nSdigits++ ;
205
990119d6 206 }
207
208 } // loop over tracks
209
7acf6008 210 fSDigits->Sort() ;
990119d6 211
7acf6008 212 nSdigits = fSDigits->GetEntriesFast() ;
213 fSDigits->Expand(nSdigits) ;
990119d6 214
215 Int_t i ;
216 for (i = 0 ; i < nSdigits ; i++) {
7acf6008 217 AliPHOSDigit * digit = (AliPHOSDigit *) fSDigits->At(i) ;
990119d6 218 digit->SetIndexInList(i) ;
219 }
7acf6008 220
221 if(gAlice->TreeS() == 0)
222 gAlice->MakeTree("S") ;
223
224 //check, if this branch already exits?
225 TBranch * sdigitsBranch = 0;
226 TBranch * sdigitizerBranch = 0;
227
228 TObjArray * branches = gAlice->TreeS()->GetListOfBranches() ;
229 Int_t ibranch;
230 Bool_t phosNotFound = kTRUE ;
231 Bool_t sdigitizerNotFound = kTRUE ;
232
233 for(ibranch = 0;ibranch <branches->GetEntries();ibranch++){
234
235 if(phosNotFound){
236 sdigitsBranch=(TBranch *) branches->At(ibranch) ;
237 if( (strcmp("PHOS",sdigitsBranch->GetName())==0 ) &&
238 (fSDigitsTitle.CompareTo(sdigitsBranch->GetTitle()) == 0) )
239 phosNotFound = kFALSE ;
240 }
241 if(sdigitizerNotFound){
242 sdigitizerBranch = (TBranch *) branches->At(ibranch) ;
243 if( (strcmp(sdigitizerBranch->GetName(),"AliPHOSSDigitizer") == 0)&&
244 (fSDigitsTitle.CompareTo(sdigitizerBranch->GetTitle()) == 0) )
245 sdigitizerNotFound = kFALSE ;
246 }
247 }
248
249 if(!(sdigitizerNotFound && phosNotFound)){
250 cout << "AliPHOSSdigitizer error:" << endl ;
251 cout << "Can not overwrite existing branches: do not write" << endl ;
252 return ;
253 }
990119d6 254
7acf6008 255 //Make (if necessary) branches
256 char * file =0;
257 if(gSystem->Getenv("CONFIG_SPLIT_FILE")){ //generating file name
258 file = new char[strlen(gAlice->GetBaseFile())+20] ;
259 sprintf(file,"%s/PHOS.SDigits.root",gAlice->GetBaseFile()) ;
260 }
261
262 TDirectory *cwd = gDirectory;
263
264 //First list of sdigits
265 Int_t bufferSize = 32000 ;
266 sdigitsBranch = gAlice->TreeS()->Branch("PHOS",&fSDigits,bufferSize);
267 sdigitsBranch->SetTitle(fSDigitsTitle.Data());
268 if (file) {
269 sdigitsBranch->SetFile(file);
270 TIter next( sdigitsBranch->GetListOfBranches());
761e34c0 271 TBranch * subbr;
272 while ((subbr=(TBranch*)next())) {
273 subbr->SetFile(file);
7acf6008 274 }
275 cwd->cd();
276 }
277
278 //second - SDigitizer
279 Int_t splitlevel = 0 ;
280 AliPHOSSDigitizer * sd = this ;
281 sdigitizerBranch = gAlice->TreeS()->Branch("AliPHOSSDigitizer","AliPHOSSDigitizer",
282 &sd,bufferSize,splitlevel);
283 sdigitizerBranch->SetTitle(fSDigitsTitle.Data());
284 if (file) {
285 sdigitizerBranch->SetFile(file);
286 TIter next( sdigitizerBranch->GetListOfBranches());
761e34c0 287 TBranch * subbr ;
288 while ((subbr=(TBranch*)next())) {
289 subbr->SetFile(file);
7acf6008 290 }
291 cwd->cd();
292 delete file;
293 }
294
761e34c0 295 sdigitsBranch->Fill() ;
296 sdigitizerBranch->Fill() ;
990119d6 297 gAlice->TreeS()->Write(0,TObject::kOverwrite) ;
7acf6008 298
299 if(strstr(option,"deb"))
300 PrintSDigits(option) ;
301
990119d6 302 }
7acf6008 303
304 if(strstr(option,"tim")){
305 gBenchmark->Stop("PHOSSDigitizer");
306 cout << "AliPHOSSDigitizer:" << endl ;
307 cout << " took " << gBenchmark->GetCpuTime("PHOSSDigitizer") << " seconds for SDigitizing "
308 << gBenchmark->GetCpuTime("PHOSSDigitizer")/fNevents << " seconds per event " << endl ;
309 cout << endl ;
310 }
311
312
990119d6 313}
314//__________________________________________________________________
7acf6008 315void AliPHOSSDigitizer::SetSDigitsBranch(const char * title ){
316 //Seting title to branch SDigits
317 if(!fSDigitsTitle.IsNull())
318 cout << "AliPHOSSdigitizer: changing SDigits file from " <<fSDigitsTitle.Data() << " to " << title << endl ;
319 fSDigitsTitle=title ;
990119d6 320}
321//__________________________________________________________________
322void AliPHOSSDigitizer::Print(Option_t* option)const{
323 cout << "------------------- "<< GetName() << " -------------" << endl ;
7acf6008 324 cout << " Writing SDigitis to branch with title " << fSDigitsTitle.Data() << endl ;
325 cout << " with digitization parameters A = " << fA << endl ;
326 cout << " B = " << fB << endl ;
327 cout << " Threshold for Primary assignment= " << fPrimThreshold << endl ;
990119d6 328 cout << "---------------------------------------------------"<<endl ;
7acf6008 329
990119d6 330}
331//__________________________________________________________________
332Bool_t AliPHOSSDigitizer::operator==( AliPHOSSDigitizer const &sd )const{
333 if( (fA==sd.fA)&&(fB==sd.fB)&&(fPrimThreshold==sd.fPrimThreshold))
334 return kTRUE ;
335 else
336 return kFALSE ;
337}
7acf6008 338//__________________________________________________________________
339void AliPHOSSDigitizer::PrintSDigits(Option_t * option){
340 //Prints list of digits produced at the current pass of AliPHOSDigitizer
341
342 cout << "AliPHOSSDigitizer: " << endl ;
343 cout << " Number of entries in SDigits list " << fSDigits->GetEntriesFast() << endl ;
344 cout << endl ;
345
346 if(strstr(option,"all")){// print all digits
347
348 //loop over digits
349 AliPHOSDigit * digit;
350 cout << "SDigit Id " << " Amplitude " << " Index " << " Nprim " << " Primaries list " << endl;
351 Int_t index ;
352 for (index = 0 ; index < fSDigits->GetEntries() ; index++) {
353 digit = (AliPHOSDigit * ) fSDigits->At(index) ;
354 cout << setw(8) << digit->GetId() << " " << setw(3) << digit->GetAmp() << " "
355 << setw(6) << digit->GetIndexInList() << " "
356 << setw(5) << digit->GetNprimary() <<" ";
357
358 Int_t iprimary;
359 for (iprimary=0; iprimary<digit->GetNprimary(); iprimary++)
360 cout << setw(5) << digit->GetPrimary(iprimary+1) << " ";
361 cout << endl;
362 }
363
364 }
365}