New macro for generating MC OCDB for PbPb.
[u/mrichter/AliRoot.git] / VZERO / AliVZERODigitizer.cxx
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9e04c3b6 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
090026bf 16/* $Id$ */
17
b0d2c2d3 18///_________________________________________________________________________
19///
20/// This class constructs Digits out of Hits
21///
22///
9e04c3b6 23
24// --- Standard library ---
9e04c3b6 25
26// --- ROOT system ---
090026bf 27#include <TMath.h>
9e04c3b6 28#include <TTree.h>
fe0adf2a 29#include <TMap.h>
8bd3e27a 30#include <TGeoManager.h>
31#include <TGeoPhysicalNode.h>
32#include <AliGeomManager.h>
e939a978 33#include <TRandom.h>
9672d66e 34#include <TF1.h>
4e2652e8 35#include <TH1F.h>
9e04c3b6 36
37// --- AliRoot header files ---
9e04c3b6 38#include "AliRun.h"
39#include "AliVZERO.h"
40#include "AliVZEROhit.h"
9e04c3b6 41#include "AliRunLoader.h"
42#include "AliLoader.h"
fe0adf2a 43#include "AliGRPObject.h"
9e04c3b6 44#include "AliRunDigitizer.h"
ce7090f5 45#include "AliCDBManager.h"
46#include "AliCDBStorage.h"
47#include "AliCDBEntry.h"
48#include "AliVZEROCalibData.h"
4e2652e8 49#include "AliCTPTimeParams.h"
30d5d647 50#include "AliLHCClockPhase.h"
9e04c3b6 51#include "AliVZEROdigit.h"
b0d2c2d3 52#include "AliVZERODigitizer.h"
72da5ce8 53#include "AliVZEROSDigit.h"
9e04c3b6 54
55ClassImp(AliVZERODigitizer)
56
57 AliVZERODigitizer::AliVZERODigitizer()
fe0adf2a 58 :AliDigitizer(),
59 fCalibData(GetCalibData()),
60 fPhotoCathodeEfficiency(0.18),
fe0adf2a 61 fNdigits(0),
62 fDigits(0),
4e2652e8 63 fSignalShape(NULL),
64 fPMResponse(NULL),
72da5ce8 65 fSinglePhESpectrum(NULL),
66 fEvenOrOdd(kFALSE),
67 fTask(kHits2Digits),
68 fVZERO(NULL)
9e04c3b6 69{
b0d2c2d3 70 // default constructor
72da5ce8 71 // Initialize OCDB and containers used in the digitization
b0d2c2d3 72
72da5ce8 73 Init();
74}
4e2652e8 75
72da5ce8 76//____________________________________________________________________________
77 AliVZERODigitizer::AliVZERODigitizer(AliVZERO *vzero, DigiTask_t task)
78 :AliDigitizer(),
79 fCalibData(GetCalibData()),
80 fPhotoCathodeEfficiency(0.18),
81 fNdigits(0),
82 fDigits(0),
83 fSignalShape(NULL),
84 fPMResponse(NULL),
85 fSinglePhESpectrum(NULL),
86 fEvenOrOdd(kFALSE),
87 fTask(task),
88 fVZERO(vzero)
89{
90 // constructor
91 // Initialize OCDB and containers used in the digitization
4e2652e8 92
72da5ce8 93 Init();
9e04c3b6 94}
72da5ce8 95
9e04c3b6 96//____________________________________________________________________________
97 AliVZERODigitizer::AliVZERODigitizer(AliRunDigitizer* manager)
0b2bea8b 98 :AliDigitizer(manager),
99 fCalibData(GetCalibData()),
100 fPhotoCathodeEfficiency(0.18),
0b2bea8b 101 fNdigits(0),
fe0adf2a 102 fDigits(0),
4e2652e8 103 fSignalShape(NULL),
104 fPMResponse(NULL),
72da5ce8 105 fSinglePhESpectrum(NULL),
106 fEvenOrOdd(kFALSE),
107 fTask(kHits2Digits),
108 fVZERO(NULL)
9e04c3b6 109{
110 // constructor
4e2652e8 111 // Initialize OCDB and containers used in the digitization
72da5ce8 112
113 Init();
114}
115
116//____________________________________________________________________________
117 AliVZERODigitizer::~AliVZERODigitizer()
118{
119 // destructor
9e04c3b6 120
72da5ce8 121 if (fDigits) {
122 fDigits->Delete();
123 delete fDigits;
124 fDigits=0;
125 }
126
127 if (fSignalShape) {
128 delete fSignalShape;
129 fSignalShape = NULL;
130 }
131 if (fPMResponse) {
132 delete fPMResponse;
133 fPMResponse = NULL;
134 }
135 if (fSinglePhESpectrum) {
136 delete fSinglePhESpectrum;
137 fSinglePhESpectrum = NULL;
138 }
139
140 for(Int_t i = 0 ; i < 64; ++i) {
141 if (fTime[i]) delete [] fTime[i];
142 }
143}
144
145//_____________________________________________________________________________
146Bool_t AliVZERODigitizer::Init()
147{
148 // Initialises the digitizer
149 // Initialize OCDB and containers used in the digitization
150
151 // check if the digitizer was already initialized
152 if (fSignalShape) return kTRUE;
153
9672d66e 154 fSignalShape = new TF1("VZEROSignalShape",this,&AliVZERODigitizer::SignalShape,0,200,6,"AliVZERODigitizer","SignalShape");
4e2652e8 155 // fSignalShape->SetParameters(0,1.57345e1,-4.25603e-1,2.9,6.40982,3.69339e-01);
81db2705 156 // fSignalShape->SetParameters(1.34330e+00,1.13007e+02,-4.95705e-01,
157 // 3.68911e+00,1.01040e+00, 3.94675e-01);
158 fSignalShape->SetParameters(-1.07335e+00,2.16002e+01,-1.26133e-01,
159 1.41619e+00,5.50334e-01,3.86111e-01);
4e2652e8 160 fPMResponse = new TF1("VZEROPMResponse",this,&AliVZERODigitizer::PMResponse,-kPMRespTime,2.*kPMRespTime,0,"AliVZERODigitizer","PMResponse");
161 fSinglePhESpectrum = new TF1("VZEROSinglePhESpectrum",this,&AliVZERODigitizer::SinglePhESpectrum,0,20,0,"AliVZERODigitizer","SinglePhESpectrum");
ce7090f5 162
4e2652e8 163 // Now get the CTP L0->L1 delay
164 AliCDBEntry *entry = AliCDBManager::Instance()->Get("GRP/CTP/CTPtiming");
165 if (!entry) AliFatal("CTP timing parameters are not found in OCDB !");
166 AliCTPTimeParams *ctpParams = (AliCTPTimeParams*)entry->GetObject();
167 Float_t l1Delay = (Float_t)ctpParams->GetDelayL1L0()*25.0;
168
7905581c 169 AliCDBEntry *entry1 = AliCDBManager::Instance()->Get("GRP/CTP/TimeAlign");
170 if (!entry1) AliFatal("CTP time-alignment is not found in OCDB !");
171 AliCTPTimeParams *ctpTimeAlign = (AliCTPTimeParams*)entry1->GetObject();
172 l1Delay += ((Float_t)ctpTimeAlign->GetDelayL1L0()*25.0);
173
4e2652e8 174 AliCDBEntry *entry2 = AliCDBManager::Instance()->Get("VZERO/Calib/TimeDelays");
175 if (!entry2) AliFatal("VZERO time delays are not found in OCDB !");
176 TH1F *delays = (TH1F*)entry2->GetObject();
177
30d5d647 178 AliCDBEntry *entry3 = AliCDBManager::Instance()->Get("GRP/Calib/LHCClockPhase");
179 if (!entry3) AliFatal("LHC clock-phase shift is not found in OCDB !");
180 AliLHCClockPhase *phase = (AliLHCClockPhase*)entry3->GetObject();
181
4e2652e8 182 for(Int_t i = 0 ; i < 64; ++i) {
183
184 for(Int_t j = 0; j < kNClocks; ++j) fAdc[i][j] = 0;
185 fLeadingTime[i] = fTimeWidth[i] = 0;
186
187 fPmGain[i] = fCalibData->GetGain(i);
188
189 fAdcPedestal[i][0] = fCalibData->GetPedestal(i);
190 fAdcSigma[i][0] = fCalibData->GetSigma(i);
191 fAdcPedestal[i][1] = fCalibData->GetPedestal(i+64);
192 fAdcSigma[i][1] = fCalibData->GetSigma(i+64);
193
51980118 194 Int_t board = AliVZEROCalibData::GetBoardNumber(i);
4e2652e8 195 fNBins[i] = TMath::Nint(((Float_t)(fCalibData->GetMatchWindow(board)+1)*25.0+
196 (Float_t)kMaxTDCWidth*fCalibData->GetWidthResolution(board))/
197 fCalibData->GetTimeResolution(board));
198 fNBinsLT[i] = TMath::Nint(((Float_t)(fCalibData->GetMatchWindow(board)+1)*25.0)/
199 fCalibData->GetTimeResolution(board));
200 fBinSize[i] = fCalibData->GetTimeResolution(board);
201 fHptdcOffset[i] = (((Float_t)fCalibData->GetTriggerCountOffset(board)-
202 (Float_t)fCalibData->GetRollOver(board))*25.0+
7905581c 203 fCalibData->GetTimeOffset(i)-
30d5d647 204 l1Delay-
205 phase->GetMeanPhase()+
4e2652e8 206 delays->GetBinContent(i+1)+
207 kV0Offset);
208
209 fTime[i] = new Float_t[fNBins[i]];
210 memset(fTime[i],0,fNBins[i]*sizeof(Float_t));
211 }
72da5ce8 212
213 return kTRUE;
9e04c3b6 214}
9672d66e 215
72da5ce8 216//____________________________________________________________________________
217void AliVZERODigitizer::Exec(Option_t* /*option*/)
218{
219 // Creates digits from hits
220 fNdigits = 0;
221
222 if (fVZERO && !fManager) {
223 AliLoader *loader = fVZERO->GetLoader();
224 if (!loader) {
225 AliError("Can not get VZERO Loader via AliVZERO object!");
226 return;
227 }
228 AliRunLoader* runLoader = AliRunLoader::Instance();
229 for (Int_t iEvent = 0; iEvent < runLoader->GetNumberOfEvents(); ++iEvent) {
230 runLoader->GetEvent(iEvent);
231 if (fTask == kHits2Digits) {
232 DigitizeHits();
233 DigitizeSDigits();
234 WriteDigits(loader);
235 }
236 else {
237 DigitizeHits();
238 WriteSDigits(loader);
239 }
240 }
4e2652e8 241 }
72da5ce8 242 else if (fManager) {
243 ReadSDigits();
244 DigitizeSDigits();
245 AliRunLoader *currentLoader = AliRunLoader::GetRunLoader(fManager->GetOutputFolderName());
246 AliLoader *loader = currentLoader->GetLoader("VZEROLoader");
247 if (!loader) {
248 AliError("Cannot get VZERO Loader via RunDigitizer!");
249 return;
250 }
251 WriteDigits(loader);
4e2652e8 252 }
72da5ce8 253 else {
254 AliFatal("Invalid digitization task! Exiting!");
4e2652e8 255 }
9e04c3b6 256}
257
72da5ce8 258//____________________________________________________________________________
259void AliVZERODigitizer::AddDigit(Int_t pmnumber, Float_t time, Float_t width, Bool_t integrator, Short_t *chargeADC, Int_t *labels)
260 {
261
262// Adds Digit
263
264 TClonesArray &ldigits = *fDigits;
265
266 new(ldigits[fNdigits++]) AliVZEROdigit(pmnumber,time,width,integrator,chargeADC,labels);
267
268}
269//____________________________________________________________________________
270void AliVZERODigitizer::AddSDigit(Int_t pmnumber, Int_t nbins, Float_t *charges, Int_t *labels)
271 {
272
273// Adds SDigit
274
275 TClonesArray &ldigits = *fDigits;
276
277 new(ldigits[fNdigits++]) AliVZEROSDigit(pmnumber,nbins,charges,labels);
278
279}
280//____________________________________________________________________________
281void AliVZERODigitizer::ResetDigits()
9e04c3b6 282{
9e04c3b6 283
72da5ce8 284// Clears Digits
285
286 fNdigits = 0;
287 if (fDigits) fDigits->Clear();
9e04c3b6 288}
289
290//____________________________________________________________________________
72da5ce8 291AliVZEROCalibData* AliVZERODigitizer::GetCalibData() const
292
293{
294 AliCDBManager *man = AliCDBManager::Instance();
295
296 AliCDBEntry *entry=0;
297
298 entry = man->Get("VZERO/Calib/Data");
299
300// if(!entry){
301// AliWarning("Load of calibration data from default storage failed!");
302// AliWarning("Calibration data will be loaded from local storage ($ALICE_ROOT)");
303// Int_t runNumber = man->GetRun();
304// entry = man->GetStorage("local://$ALICE_ROOT/OCDB")
305// ->Get("VZERO/Calib/Data",runNumber);
306//
307// }
308
309 // Retrieval of data in directory VZERO/Calib/Data:
310
311
312 AliVZEROCalibData *calibdata = 0;
313
314 if (entry) calibdata = (AliVZEROCalibData*) entry->GetObject();
315 if (!calibdata) AliFatal("No calibration data from calibration database !");
316
317 return calibdata;
318
319}
320
321double AliVZERODigitizer::SignalShape(double *x, double *par)
322{
323 // this function simulates the time
324 // of arrival of the photons at the
325 // photocathode
326 Double_t xx = x[0];
327 if (xx <= par[0]) return 0;
328 Double_t a = 1./TMath::Power((xx-par[0])/par[1],1./par[2]);
329 if (xx <= par[3]) return a;
330 Double_t b = 1./TMath::Power((xx-par[3])/par[4],1./par[5]);
331 Double_t f = a*b/(a+b);
332 AliDebug(100,Form("x=%f func=%f",xx,f));
333 return f;
334}
335
336double AliVZERODigitizer::PMResponse(double *x, double * /* par */)
337{
338 // this function describes the
339 // PM time response to a single
340 // photoelectron
341 Double_t xx = x[0]+kPMRespTime;
342 return xx*xx*TMath::Exp(-xx*xx/(kPMRespTime*kPMRespTime));
343}
344
345double AliVZERODigitizer::SinglePhESpectrum(double *x, double * /* par */)
346{
347 // this function describes the
348 // PM amplitude response to a single
349 // photoelectron
350 Double_t xx = x[0];
351 if (xx < 0) return 0;
352 return (TMath::Poisson(xx,kPMNbOfSecElec)+kPMTransparency*TMath::Poisson(xx,1.0));
353}
354
355Int_t AliVZERODigitizer::Cell2Pmt(Int_t cell) const
356{
357 // The method maps the scintillator
358 // indexes to the PM ones
359 if (cell < 0 || cell >= 80) {
360 AliError(Form("Wrong VZERO cell index %d",cell));
361 return -1;
362 }
363 if (cell < 16) return cell;
364 if (cell < 48) return 8 + cell/2;
365 return cell - 16;
366}
367
368void AliVZERODigitizer::DigitizeHits()
369{
370 // Digitize the hits to the level of
371 // SDigits (fTime arrays)
4e2652e8 372
373 for(Int_t i = 0 ; i < 64; ++i) {
374 memset(fTime[i],0,fNBins[i]*sizeof(Float_t));
72da5ce8 375 fLabels[i][0] = fLabels[i][1] = fLabels[i][2] = -1;
fad64858 376 }
4e2652e8 377 Float_t integral = fPMResponse->Integral(-kPMRespTime,2.*kPMRespTime);
378 Float_t meansPhE = fSinglePhESpectrum->Mean(0,20);
379
72da5ce8 380 AliLoader* loader = fVZERO->GetLoader();
8bd3e27a 381 if (!loader) {
72da5ce8 382 AliError("Can not get VZERO Loader!");
383 return;
384 }
8bd3e27a 385 loader->LoadHits();
386 TTree* treeH = loader->TreeH();
387 if (!treeH) {
72da5ce8 388 AliError("Cannot get TreeH!");
389 return;
390 }
391 TClonesArray* hits = fVZERO->Hits();
4e2652e8 392
b0d2c2d3 393// Now makes Digits from hits
8bd3e27a 394 Int_t nTracks = (Int_t) treeH->GetEntries();
395 for (Int_t iTrack = 0; iTrack < nTracks; iTrack++) {
72da5ce8 396 fVZERO->ResetHits();
8bd3e27a 397 treeH->GetEvent(iTrack);
398 Int_t nHits = hits->GetEntriesFast();
399 for (Int_t iHit = 0; iHit < nHits; iHit++) {
4e2652e8 400 AliVZEROhit* hit = (AliVZEROhit *)hits->UncheckedAt(iHit);
401 Int_t nPhot = hit->Nphot();
402 Int_t cell = hit->Cell();
403 Int_t pmt = Cell2Pmt(cell);
127e0d90 404 if (pmt < 0) continue;
30c4ff64 405 Int_t trackLabel = hit->GetTrack();
406 for(Int_t l = 0; l < 3; ++l) {
72da5ce8 407 if (fLabels[pmt][l] < 0) {
408 fLabels[pmt][l] = trackLabel;
30c4ff64 409 break;
410 }
411 }
4e2652e8 412 Float_t dt_scintillator = gRandom->Gaus(0,kIntTimeRes);
413 Float_t t = dt_scintillator + 1e9*hit->Tof();
414 if (pmt < 32) t += kV0CDelayCables;
415 t += fHptdcOffset[pmt];
416 Int_t nPhE;
3772afd5 417 Float_t prob = fCalibData->GetLightYields(pmt)*fPhotoCathodeEfficiency; // Optical losses included!
4e2652e8 418 if (nPhot > 100)
d0ff6548 419 nPhE = (Int_t)gRandom->Gaus(prob*Float_t(nPhot)+0.5,
420 sqrt(Float_t(nPhot)*prob*(1.-prob)));
4e2652e8 421 else
422 nPhE = gRandom->Binomial(nPhot,prob);
423 Float_t charge = TMath::Qe()*fPmGain[pmt]*fBinSize[pmt]/integral;
424 for (Int_t iPhE = 0; iPhE < nPhE; ++iPhE) {
425 Float_t tPhE = t + fSignalShape->GetRandom(0,fBinSize[pmt]*Float_t(fNBins[pmt]));
426 Float_t gainVar = fSinglePhESpectrum->GetRandom(0,20)/meansPhE;
427 Int_t firstBin = TMath::Max(0,(Int_t)((tPhE-kPMRespTime)/fBinSize[pmt]));
428 Int_t lastBin = TMath::Min(fNBins[pmt]-1,(Int_t)((tPhE+2.*kPMRespTime)/fBinSize[pmt]));
429 for(Int_t iBin = firstBin; iBin <= lastBin; ++iBin) {
430 Float_t tempT = fBinSize[pmt]*(0.5+iBin)-tPhE;
431 fTime[pmt][iBin] += gainVar*charge*fPMResponse->Eval(tempT);
432 }
433 } // ph.e. loop
434 } // hit loop
435 } // track loop
8bd3e27a 436 loader->UnloadHits();
72da5ce8 437}
438
439
440void AliVZERODigitizer::DigitizeSDigits()
441{
442 // Digitize the fTime arrays (SDigits) to the level of
443 // Digits (fAdc arrays)
444 for(Int_t i = 0 ; i < 64; ++i) {
445 for(Int_t j = 0; j < kNClocks; ++j) fAdc[i][j] = 0;
446 fLeadingTime[i] = fTimeWidth[i] = 0;
447 }
4e2652e8 448
449 Float_t maximum = 0.9*fSignalShape->GetMaximum(0,200); // Not exact, one needs to do this on the convoluted
450 Float_t integral2 = fSignalShape->Integral(0,200); // function. Anyway the effect is small <10% on the 2.5 ADC thr
451 for (Int_t ipmt = 0; ipmt < 64; ++ipmt) {
452 Float_t thr = fCalibData->GetDiscriThr(ipmt)*kChargePerADC*maximum*fBinSize[ipmt]/integral2;
453 Bool_t ltFound = kFALSE, ttFound = kFALSE;
454 for (Int_t iBin = 0; iBin < fNBins[ipmt]; ++iBin) {
b6fd9c4a 455 Float_t t = fBinSize[ipmt]*Float_t(iBin);
4e2652e8 456 if (fTime[ipmt][iBin] > thr) {
457 if (!ltFound && (iBin < fNBinsLT[ipmt])) {
458 ltFound = kTRUE;
459 fLeadingTime[ipmt] = t;
460 }
461 }
462 else {
463 if (ltFound) {
464 if (!ttFound) {
465 ttFound = kTRUE;
466 fTimeWidth[ipmt] = t - fLeadingTime[ipmt];
467 }
468 }
469 }
d0ff6548 470 Float_t tadc = t - kClockOffset - fCalibData->GetTimeOffset(ipmt);
471 Int_t clock = kNClocks/2 - Int_t(tadc/25.0);
4e2652e8 472 if (clock >= 0 && clock < kNClocks)
473 fAdc[ipmt][clock] += fTime[ipmt][iBin]/kChargePerADC;
474 }
51980118 475 Int_t board = AliVZEROCalibData::GetBoardNumber(ipmt);
4e2652e8 476 if (ltFound && ttFound) {
477 fTimeWidth[ipmt] = fCalibData->GetWidthResolution(board)*
478 Float_t(Int_t(fTimeWidth[ipmt]/fCalibData->GetWidthResolution(board)));
479 if (fTimeWidth[ipmt] < Float_t(kMinTDCWidth)*fCalibData->GetWidthResolution(board))
480 fTimeWidth[ipmt] = Float_t(kMinTDCWidth)*fCalibData->GetWidthResolution(board);
481 if (fTimeWidth[ipmt] > Float_t(kMaxTDCWidth)*fCalibData->GetWidthResolution(board))
482 fTimeWidth[ipmt] = Float_t(kMaxTDCWidth)*fCalibData->GetWidthResolution(board);
483 }
484 }
b0d2c2d3 485
72da5ce8 486 fEvenOrOdd = gRandom->Integer(2);
4e2652e8 487 for (Int_t j=0; j<64; ++j){
488 for (Int_t iClock = 0; iClock < kNClocks; ++iClock) {
72da5ce8 489 Int_t integrator = (iClock + fEvenOrOdd) % 2;
4e2652e8 490 fAdc[j][iClock] += gRandom->Gaus(fAdcPedestal[j][integrator], fAdcSigma[j][integrator]);
491 }
492 }
20277079 493
72da5ce8 494}
495
496void AliVZERODigitizer::WriteDigits(AliLoader *loader)
497{
498 // Take fAdc arrays filled by the previous
499 // method and produce and add digits to the digit Tree
500
501 loader->LoadDigits("UPDATE");
4e2652e8 502
72da5ce8 503 if (!loader->TreeD()) loader->MakeTree("D");
504 loader->MakeDigitsContainer();
505 TTree* treeD = loader->TreeD();
506 DigitsArray();
507 treeD->Branch("VZERODigit", &fDigits);
508
30c4ff64 509 Short_t *chargeADC = new Short_t[kNClocks];
4e2652e8 510 for (Int_t i=0; i<64; i++) {
30c4ff64 511 for (Int_t j = 0; j < kNClocks; ++j) {
4e2652e8 512 Int_t tempadc = Int_t(fAdc[i][j]);
513 if (tempadc > 1023) tempadc = 1023;
30c4ff64 514 chargeADC[j] = tempadc;
4e2652e8 515 }
72da5ce8 516 AddDigit(i, fLeadingTime[i], fTimeWidth[i], Bool_t((10+fEvenOrOdd)%2), chargeADC, fLabels[i]);
4e2652e8 517 }
30c4ff64 518 delete [] chargeADC;
4e2652e8 519
b0d2c2d3 520 treeD->Fill();
72da5ce8 521 loader->WriteDigits("OVERWRITE");
522 loader->UnloadDigits();
523 ResetDigits();
9e04c3b6 524}
525
72da5ce8 526void AliVZERODigitizer::WriteSDigits(AliLoader *loader)
9e04c3b6 527{
72da5ce8 528 // Take fTime arrays filled by the previous
529 // method and produce and add sdigits to the sdigit Tree
fe0adf2a 530
72da5ce8 531 loader->LoadSDigits("UPDATE");
fe0adf2a 532
72da5ce8 533 if (!loader->TreeS()) loader->MakeTree("S");
534 loader->MakeSDigitsContainer();
535 TTree* treeS = loader->TreeS();
536 SDigitsArray();
537 treeS->Branch("VZEROSDigit", &fDigits);
538
539 for (Int_t ipmt = 0; ipmt < 64; ++ipmt) {
540 AddSDigit(ipmt,fNBins[ipmt],fTime[ipmt],fLabels[ipmt]);
541 }
ce7090f5 542
72da5ce8 543 treeS->Fill();
544 loader->WriteSDigits("OVERWRITE");
545 loader->UnloadSDigits();
546 ResetDigits();
547}
ce7090f5 548
72da5ce8 549void AliVZERODigitizer::ReadSDigits()
ce7090f5 550{
72da5ce8 551 // Read SDigits which are then to precessed
552 // in the following method
553 for(Int_t i = 0 ; i < 64; ++i) {
554 memset(fTime[i],0,fNBins[i]*sizeof(Float_t));
555 fLabels[i][0] = fLabels[i][1] = fLabels[i][2] = -1;
556 }
ce7090f5 557
72da5ce8 558 // Loop over input files
559 Int_t nFiles= fManager->GetNinputs();
560 for (Int_t inputFile = 0; inputFile < nFiles; inputFile++) {
561 // Get the current loader
562 AliRunLoader* currentLoader =
563 AliRunLoader::GetRunLoader(fManager->GetInputFolderName(inputFile));
ce7090f5 564
72da5ce8 565 AliLoader *loader = currentLoader->GetLoader("VZEROLoader");
566 loader->LoadSDigits("READ");
567
568 // Get the tree of summable digits
569 TTree* sdigitsTree = loader->TreeS();
570 if (!sdigitsTree) {
571 AliError("No sdigit tree from manager");
572 continue;
573 }
ce7090f5 574
72da5ce8 575 // Get the branch
576 TBranch* sdigitsBranch = sdigitsTree->GetBranch("VZEROSDigit");
577 if (!sdigitsBranch) {
578 AliError("Failed to get sdigit branch");
579 return;
580 }
4e2652e8 581
72da5ce8 582 // Set the branch address
583 TClonesArray *sdigitsArray = NULL;
584 sdigitsBranch->SetAddress(&sdigitsArray);
585
586 // Sum contributions from the sdigits
587 // Get number of entries in the tree
588 Int_t nentries = Int_t(sdigitsBranch->GetEntries());
589 for (Int_t entry = 0; entry < nentries; ++entry) {
590 sdigitsBranch->GetEntry(entry);
591 // Get the number of sdigits
592 Int_t nsdigits = sdigitsArray->GetEntries();
593 for (Int_t sdigit = 0; sdigit < nsdigits; sdigit++) {
594 AliVZEROSDigit* sDigit = static_cast<AliVZEROSDigit*>(sdigitsArray->UncheckedAt(sdigit));
595 Int_t pmNumber = sDigit->PMNumber();
596 Int_t nbins = sDigit->GetNBins();
597 if (nbins != fNBins[pmNumber]) {
598 AliError(Form("Incompatible number of bins between digitizer (%d) and sdigit (%d) for PM %d! Skipping sdigit!",
599 fNBins[pmNumber],nbins,pmNumber));
600 continue;
601 }
602 // Sum the charges
603 Float_t *charges = sDigit->GetCharges();
604 for(Int_t iBin = 0; iBin < nbins; ++iBin) fTime[pmNumber][iBin] += charges[iBin];
605 // and the labels
606 Int_t *labels = sDigit->GetTracks();
607 Int_t j = 0;
608 for(Int_t i = 0; i < 3; ++i) {
609 if (fLabels[pmNumber][i] < 0) {
610 if (labels[j] < 0) break;
611 fLabels[pmNumber][i] = labels[j];
612 j++;
613 }
614 }
615 }
616 }
617 loader->UnloadSDigits();
618 }
4e2652e8 619}
620
72da5ce8 621//____________________________________________________________________
622TClonesArray*
623AliVZERODigitizer::DigitsArray()
4e2652e8 624{
72da5ce8 625 // Initialize digit array if not already and
626 // return pointer to it.
627 if (!fDigits) {
628 fDigits = new TClonesArray("AliVZEROdigit", 64);
629 fNdigits = 0;
630 }
631 return fDigits;
4e2652e8 632}
633
72da5ce8 634//____________________________________________________________________
635TClonesArray*
636AliVZERODigitizer::SDigitsArray()
4e2652e8 637{
72da5ce8 638 // Initialize sdigit array if not already and
639 // return pointer to it.
640 if (!fDigits) {
641 fDigits = new TClonesArray("AliVZEROSDigit", 64);
642 fNdigits = 0;
4e2652e8 643 }
72da5ce8 644 return fDigits;
4e2652e8 645}