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