Fixes, and extra debug
[u/mrichter/AliRoot.git] / FMD / AliFMDDigitizer.cxx
CommitLineData
4347b38f 1/**************************************************************************
2 * Copyright(c) 2004, ALICE Experiment at CERN, All rights reserved. *
66d2ede1 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
4347b38f 16/* $Id$ */
17
18//////////////////////////////////////////////////////////////////////////////
19//
20// This class contains the procedures simulation ADC signal for the
21// Forward Multiplicity detector : Hits->Digits and Hits->SDigits
22//
23// Digits consists of
24// - Detector #
25// - Ring ID
26// - Sector #
27// - Strip #
28// - ADC count in this channel
29//
30// Digits consists of
31// - Detector #
32// - Ring ID
33// - Sector #
34// - Strip #
35// - Total energy deposited in the strip
36// - ADC count in this channel
37//
38// As the Digits and SDigits have so much in common, the classes
39// AliFMDDigitizer and AliFMDSDigitizer are implemented via a base
40// class AliFMDBaseDigitizer.
41//
42// +---------------------+
43// | AliFMDBaseDigitizer |
44// +---------------------+
45// ^
46// |
47// +----------+---------+
48// | |
49// +-----------------+ +------------------+
50// | AliFMDDigitizer | | AliFMDSDigitizer |
51// +-----------------+ +------------------+
52//
53// These classes has several paramters:
54//
55// fPedestal
56// fPedestalWidth
57// (Only AliFMDDigitizer)
58// Mean and width of the pedestal. The pedestal is simulated
59// by a Guassian, but derived classes my override MakePedestal
60// to simulate it differently (or pick it up from a database).
61//
62// fVA1MipRange
63// The dymamic MIP range of the VA1_ALICE pre-amplifier chip
64//
65// fAltroChannelSize
66// The largest number plus one that can be stored in one
67// channel in one time step in the ALTRO ADC chip.
68//
69// fSampleRate
70// How many times the ALTRO ADC chip samples the VA1_ALICE
71// pre-amplifier signal. The VA1_ALICE chip is read-out at
72// 10MHz, while it's possible to drive the ALTRO chip at
73// 25MHz. That means, that the ALTRO chip can have time to
74// sample each VA1_ALICE signal up to 2 times. Although it's
75// not certain this feature will be used in the production,
76// we'd like have the option, and so it should be reflected in
77// the code.
78//
4347b38f 79//
e802be3e 80// The shaping function of the VA1_ALICE is generally given by
4347b38f 81//
e802be3e 82// f(x) = A(1 - exp(-Bx))
4347b38f 83//
e802be3e 84// where A is the total charge collected in the pre-amp., and B is a
85// paramter that depends on the shaping time of the VA1_ALICE circut.
86//
87// When simulating the shaping function of the VA1_ALICe
88// pre-amp. chip, we have to take into account, that the shaping
89// function depends on the previous value of read from the pre-amp.
90//
91// That results in the following algorithm:
92//
93// last = 0;
94// FOR charge IN pre-amp. charge train DO
95// IF last < charge THEN
96// f(t) = (charge - last) * (1 - exp(-B * t)) + last
97// ELSE
98// f(t) = (last - charge) * exp(-B * t) + charge)
99// ENDIF
100// FOR i IN # samples DO
101// adc_i = f(i / (# samples))
102// DONE
103// last = charge
104// DONE
105//
106// Here,
107//
108// pre-amp. charge train
109// is a series of 128 charges read from the VA1_ALICE chip
110//
111// # samples
112// is the number of times the ALTRO ADC samples each of the 128
113// charges from the pre-amp.
4347b38f 114//
115// Where Q is the total charge collected by the VA1_ALICE
116// pre-amplifier. Q is then given by
117//
118// E S
119// Q = - -
120// e R
121//
122// where E is the total energy deposited in a silicon strip, R is the
123// dynamic range of the VA1_ALICE pre-amp (fVA1MipRange), e is the
124// energy deposited by a single MIP, and S ALTRO channel size in each
125// time step (fAltroChannelSize).
126//
127// The energy deposited per MIP is given by
128//
129// e = M * rho * w
130//
131// where M is the universal number 1.664, rho is the density of
132// silicon, and w is the depth of the silicon sensor.
133//
134// The final ADC count is given by
135//
136// C' = C + P
137//
138// where P is the (randomized) pedestal (see MakePedestal)
139//
140// This class uses the class template AliFMDMap<Type> to make an
141// internal cache of the energy deposted of the hits. The class
142// template is instantasized as
143//
144// typedef AliFMDMap<std::pair<Float_t, UShort_t> > AliFMDEdepMap;
145//
146// The first member of the values is the summed energy deposition in a
147// given strip, while the second member of the values is the number of
148// hits in a given strip. Using the second member, it's possible to
149// do some checks on just how many times a strip got hit, and what
150// kind of error we get in our reconstructed hits. Note, that this
151// information is currently not written to the digits tree. I think a
152// QA (Quality Assurance) digit tree is better suited for that task.
153// However, the information is there to be used in the future.
154//
155//
156// Latest changes by Christian Holm Christensen
157//
158//////////////////////////////////////////////////////////////////////////////
159
e802be3e 160// /1
161// | A(-1 + B + exp(-B))
162// | f(x) dx = ------------------- = 1
163// | B
164// / 0
165//
166// and B is the a parameter defined by the shaping time (fShapingTime).
167//
168// Solving the above equation, for A gives
169//
170// B
171// A = ----------------
172// -1 + B + exp(-B)
173//
174// So, if we define the function g: [0,1] -> [0:1] by
175//
176// / v
177// | Bu + exp(-Bu) - Bv - exp(-Bv)
178// g(u,v) = | f(x) dx = -A -----------------------------
179// | B
180// / u
181//
182// we can evaluate the ALTRO sample of the VA1_ALICE pre-amp between
183// any two times (u, v), by
184//
185//
186// B Bu + exp(-Bu) - Bv - exp(-Bv)
187// C = Q g(u,v) = - Q ---------------- -----------------------------
188// -1 + B + exp(-B) B
189//
190// Bu + exp(-Bu) - Bv - exp(-Bv)
191// = - Q -----------------------------
192// -1 + B + exp(-B)
193//
194
56b1929b 195#include <TTree.h> // ROOT_TTree
196#include <TRandom.h> // ROOT_TRandom
197#include <AliLog.h> // ALILOG_H
e802be3e 198#include "AliFMDDigitizer.h" // ALIFMDDIGITIZER_H
199#include "AliFMD.h" // ALIFMD_H
1a1fdef7 200#include "AliFMDGeometry.h" // ALIFMDGEOMETRY_H
201#include "AliFMDDetector.h" // ALIFMDDETECTOR_H
202#include "AliFMDRing.h" // ALIFMDRING_H
e802be3e 203#include "AliFMDHit.h" // ALIFMDHIT_H
204#include "AliFMDDigit.h" // ALIFMDDIGIT_H
56b1929b 205#include <AliRunDigitizer.h> // ALIRUNDIGITIZER_H
206#include <AliRun.h> // ALIRUN_H
207#include <AliLoader.h> // ALILOADER_H
208#include <AliRunLoader.h> // ALIRUNLOADER_H
4347b38f 209
4347b38f 210//====================================================================
925e6570 211ClassImp(AliFMDBaseDigitizer)
1a1fdef7 212#if 0
213 ; // This is here to keep Emacs for indenting the next line
214#endif
4347b38f 215
216//____________________________________________________________________
217AliFMDBaseDigitizer::AliFMDBaseDigitizer()
218 : fRunLoader(0)
66d2ede1 219{
4347b38f 220 // Default ctor - don't use it
66d2ede1 221}
222
4347b38f 223//____________________________________________________________________
224AliFMDBaseDigitizer::AliFMDBaseDigitizer(AliRunDigitizer* manager)
225 : AliDigitizer(manager, "AliFMDBaseDigitizer", "FMD Digitizer base class"),
226 fRunLoader(0),
e802be3e 227 fEdep(AliFMDMap::kMaxDetectors,
228 AliFMDMap::kMaxRings,
229 AliFMDMap::kMaxSectors,
230 AliFMDMap::kMaxStrips)
66d2ede1 231{
4347b38f 232 // Normal CTOR
102e9e9c 233 AliDebug(1," processed");
4347b38f 234 SetVA1MipRange();
235 SetAltroChannelSize();
236 SetSampleRate();
237 SetShapingTime();
66d2ede1 238}
239
4347b38f 240//____________________________________________________________________
241AliFMDBaseDigitizer::AliFMDBaseDigitizer(const Char_t* name,
242 const Char_t* title)
243 : AliDigitizer(name, title),
244 fRunLoader(0),
e802be3e 245 fEdep(AliFMDMap::kMaxDetectors,
246 AliFMDMap::kMaxRings,
247 AliFMDMap::kMaxSectors,
248 AliFMDMap::kMaxStrips)
66d2ede1 249{
4347b38f 250 // Normal CTOR
251 AliDebug(1," processed");
252 SetVA1MipRange();
253 SetAltroChannelSize();
254 SetSampleRate();
255 SetShapingTime();
256}
3d44ce66 257
4347b38f 258//____________________________________________________________________
259AliFMDBaseDigitizer::~AliFMDBaseDigitizer()
260{
261 // Destructor
66d2ede1 262}
263
4347b38f 264//____________________________________________________________________
265Bool_t
266AliFMDBaseDigitizer::Init()
66d2ede1 267{
4347b38f 268 // Initialization
269 return kTRUE;
66d2ede1 270}
271
88cb7938 272
4347b38f 273//____________________________________________________________________
274void
275AliFMDBaseDigitizer::SumContributions(AliFMD* fmd)
276{
277 // Sum energy deposited contributions from each hit in a cache
278 // (fEdep).
279 if (!fRunLoader)
280 Fatal("SumContributions", "no run loader");
281
282 // Clear array of deposited energies
69b696b9 283 fEdep.Reset();
4347b38f 284
285 // Get the FMD loader
286 AliLoader* inFMD = fRunLoader->GetLoader("FMDLoader");
287 // And load the hits
288 inFMD->LoadHits("READ");
289
290 // Get the tree of hits
291 TTree* hitsTree = inFMD->TreeH();
292 if (!hitsTree) {
293 // Try again
294 inFMD->LoadHits("READ");
295 hitsTree = inFMD->TreeH();
296 }
297
298 // Get the FMD branch
299 TBranch* hitsBranch = hitsTree->GetBranch("FMD");
300 if (hitsBranch) fmd->SetHitsAddressBranch(hitsBranch);
301 else AliFatal("Branch FMD hit not found");
302
303 // Get a list of hits from the FMD manager
304 TClonesArray *fmdHits = fmd->Hits();
305
306 // Get number of entries in the tree
307 Int_t ntracks = Int_t(hitsTree->GetEntries());
308
309 // Loop over the tracks in the
310 for (Int_t track = 0; track < ntracks; track++) {
311 // Read in entry number `track'
312 hitsBranch->GetEntry(track);
313
314 // Get the number of hits
315 Int_t nhits = fmdHits->GetEntries ();
316 for (Int_t hit = 0; hit < nhits; hit++) {
317 // Get the hit number `hit'
318 AliFMDHit* fmdHit =
319 static_cast<AliFMDHit*>(fmdHits->UncheckedAt(hit));
320
321 // Extract parameters
322 UShort_t detector = fmdHit->Detector();
323 Char_t ring = fmdHit->Ring();
324 UShort_t sector = fmdHit->Sector();
325 UShort_t strip = fmdHit->Strip();
326 Float_t edep = fmdHit->Edep();
e802be3e 327 if (fEdep(detector, ring, sector, strip).fEdep != 0)
4347b38f 328 AliDebug(1, Form("Double hit in %d%c(%d,%d)",
329 detector, ring, sector, strip));
330
e802be3e 331 fEdep(detector, ring, sector, strip).fEdep += edep;
332 fEdep(detector, ring, sector, strip).fN += 1;
4347b38f 333 // Add this to the energy deposited for this strip
334 } // hit loop
335 } // track loop
336}
66d2ede1 337
4347b38f 338//____________________________________________________________________
339void
340AliFMDBaseDigitizer::DigitizeHits(AliFMD* fmd) const
66d2ede1 341{
4347b38f 342 // For the stored energy contributions in the cache (fEdep), convert
343 // the energy signal to ADC counts, and store the created digit in
344 // the digits array (AliFMD::fDigits)
345 //
1a1fdef7 346 AliFMDGeometry* geometry = AliFMDGeometry::Instance();
347
4347b38f 348 TArrayI counts(3);
349 for (UShort_t detector=1; detector <= 3; detector++) {
350 // Get pointer to subdetector
1a1fdef7 351 AliFMDDetector* det = geometry->GetDetector(detector);
4347b38f 352 if (!det) continue;
353 for (UShort_t ringi = 0; ringi <= 1; ringi++) {
354 // Get pointer to Ring
1a1fdef7 355 AliFMDRing* r = det->GetRing((ringi == 0 ? 'I' : 'O'));
4347b38f 356 if (!r) continue;
357
358 // Get number of sectors
359 UShort_t nSectors = UShort_t(360. / r->GetTheta());
360 // Loop over the number of sectors
361 for (UShort_t sector = 0; sector < nSectors; sector++) {
362 // Get number of strips
363 UShort_t nStrips = r->GetNStrips();
364 // Loop over the stips
e802be3e 365 Float_t last = 0;
4347b38f 366 for (UShort_t strip = 0; strip < nStrips; strip++) {
e802be3e 367 // Reset the counter array to the invalid value -1
4347b38f 368 counts.Reset(-1);
e802be3e 369 // Reset the last `ADC' value when we've get to the end of a
370 // VA1_ALICE channel.
371 if (strip % 128 == 0) last = 0;
372
373 Float_t edep = fEdep(detector, r->GetId(), sector, strip).fEdep;
56b1929b 374 ConvertToCount(edep, last, r->GetSiThickness(),
1a1fdef7 375 geometry->GetSiDensity(), counts);
e802be3e 376 last = edep;
4347b38f 377 AddDigit(fmd, detector, r->GetId(), sector, strip,
378 edep, UShort_t(counts[0]),
379 Short_t(counts[1]), Short_t(counts[2]));
380#if 0
381 // This checks if the digit created will give the `right'
382 // number of particles when reconstructed, using a naiive
383 // approach. It's here only as a quality check - nothing
384 // else.
e802be3e 385 CheckDigit(fEdep(detector, r->GetId(), sector, strip).fEdep,
386 fEdep(detector, r->GetId(), sector, strip).fN,
4347b38f 387 counts);
388#endif
389 } // Strip
390 } // Sector
391 } // Ring
392 } // Detector
393}
88cb7938 394
4347b38f 395//____________________________________________________________________
396void
397AliFMDBaseDigitizer::ConvertToCount(Float_t edep,
e802be3e 398 Float_t last,
4347b38f 399 Float_t siThickness,
400 Float_t siDensity,
401 TArrayI& counts) const
402{
e802be3e 403 // Convert the total energy deposited to a (set of) ADC count(s).
4347b38f 404 //
e802be3e 405 // This is done by
406 //
407 // Energy_Deposited ALTRO_Channel_Size
408 // ADC = -------------------------- ------------------- + pedestal
409 // Energy_Deposition_Of_1_MIP VA1_ALICE_MIP_Range
4347b38f 410 //
e802be3e 411 // Energy_Deposited fAltroChannelSize
412 // = --------------------------------- ----------------- + pedestal
413 // 1.664 * Si_Thickness * Si_Density fVA1MipRange
414 //
4347b38f 415 //
e802be3e 416 // = Energy_Deposited * ConversionFactor + pedestal
417 //
418 // However, this is modified by the response function of the
419 // VA1_ALICE pre-amp. chip in case we are doing oversampling of the
420 // VA1_ALICE output.
421 //
422 // In that case, we get N=fSampleRate values of the ADC, and the
423 // `EnergyDeposited' is a function of which sample where are
424 // calculating the ADC for
425 //
426 // ADC_i = f(EnergyDeposited, i/N, Last) * ConversionFactor + pedestal
427 //
428 // where Last is the Energy deposited in the previous strip.
429 //
430 // Here, f is the shaping function of the VA1_ALICE. This is given
431 // by
432 //
433 // | (E - l) * (1 - exp(-B * t) + l if E > l
434 // f(E, t, l) = <
435 // | (l - E) * exp(-B * t) + E otherwise
436 //
437 //
438 // = E + (l - E) * ext(-B * t)
439 //
440 const Float_t mipEnergy = 1.664 * siThickness * siDensity;
441 const Float_t convf = (1 / mipEnergy * Float_t(fAltroChannelSize)
442 / fVA1MipRange);
443 UShort_t ped = MakePedestal();
444
445 // In case we don't oversample, just return the end value.
446 if (fSampleRate == 1) {
447 counts[0] = UShort_t(TMath::Min(edep * convf + ped,
448 Float_t(fAltroChannelSize)));
449 return;
450 }
451
4347b38f 452 // Create a pedestal
e802be3e 453 Int_t n = fSampleRate;
454 Float_t B = fShapingTime;
4347b38f 455 for (Ssiz_t i = 0; i < n; i++) {
e802be3e 456 Float_t t = Float_t(i) / n;
457 Float_t s = edep + (last - edep) * TMath::Exp(-B * t);
458 counts[i] = UShort_t(TMath::Min(s * convf + ped,
4347b38f 459 Float_t(fAltroChannelSize)));
460 }
461}
88cb7938 462
3d44ce66 463
4347b38f 464//====================================================================
925e6570 465ClassImp(AliFMDDigitizer)
66d2ede1 466
4347b38f 467//____________________________________________________________________
468AliFMDDigitizer::AliFMDDigitizer()
469 : AliFMDBaseDigitizer()
470{
471 // Default ctor - don't use it
472}
66d2ede1 473
4347b38f 474//____________________________________________________________________
475AliFMDDigitizer::AliFMDDigitizer(AliRunDigitizer* manager)
476 : AliFMDBaseDigitizer(manager)
477{
478 // Normal CTOR
479 AliDebug(1," processed");
480 SetPedestal();
481}
66d2ede1 482
4347b38f 483//____________________________________________________________________
484void
485AliFMDDigitizer::Exec(Option_t*)
486{
487 // Get the output manager
488 TString outFolder(fManager->GetOutputFolderName());
489 AliRunLoader* out =
490 AliRunLoader::GetRunLoader(outFolder.Data());
491 // Get the FMD output manager
492 AliLoader* outFMD = out->GetLoader("FMDLoader");
493
494 // Get the input loader
495 TString inFolder(fManager->GetInputFolderName(0));
496 fRunLoader =
a3537838 497 AliRunLoader::GetRunLoader(inFolder.Data());
4347b38f 498 if (!fRunLoader) {
499 AliError("Can not find Run Loader for input stream 0");
500 return;
501 }
502 // Get the AliRun object
503 if (!fRunLoader->GetAliRun()) fRunLoader->LoadgAlice();
504
505 // Get the AliFMD object
506 AliFMD* fmd = static_cast<AliFMD*>(fRunLoader->GetAliRun()->GetDetector("FMD"));
507 if (!fmd) {
508 AliError("Can not get FMD from gAlice");
509 return;
510 }
511
512 Int_t nFiles= fManager->GetNinputs();
513 for (Int_t inputFile = 0; inputFile < nFiles; inputFile++) {
514 AliDebug(1,Form(" Digitizing event number %d",
515 fManager->GetOutputEventNr()));
516 // Get the current loader
517 fRunLoader =
518 AliRunLoader::GetRunLoader(fManager->GetInputFolderName(inputFile));
519 if (!fRunLoader) Fatal("Exec", "no run loader");
520 // Cache contriutions
521 SumContributions(fmd);
522 }
523 // Digitize the event
524 DigitizeHits(fmd);
525
526 // Load digits from the tree
527 outFMD->LoadDigits("update");
528 // Get the tree of digits
529 TTree* digitTree = outFMD->TreeD();
530 if (!digitTree) {
531 outFMD->MakeTree("D");
532 digitTree = outFMD->TreeD();
533 }
534 digitTree->Reset();
535 // Make a branch in the tree
536 TClonesArray* digits = fmd->Digits();
537 fmd->MakeBranchInTree(digitTree, fmd->GetName(), &(digits), 4000, 0);
538 // TBranch* digitBranch = digitTree->GetBranch(fmd->GetName());
539 // Fill the tree
540 digitTree->Fill();
66d2ede1 541
4347b38f 542 // Write the digits to disk
543 outFMD->WriteDigits("OVERWRITE");
544 outFMD->UnloadHits();
545 outFMD->UnloadDigits();
4110645f 546
4347b38f 547 // Reset the digits in the AliFMD object
548 fmd->ResetDigits();
549}
3d44ce66 550
88cb7938 551
4347b38f 552//____________________________________________________________________
553UShort_t
554AliFMDDigitizer::MakePedestal() const
555{
556 return UShort_t(TMath::Max(gRandom->Gaus(fPedestal, fPedestalWidth), 0.));
557}
88cb7938 558
4347b38f 559//____________________________________________________________________
560void
561AliFMDDigitizer::AddDigit(AliFMD* fmd,
562 UShort_t detector,
563 Char_t ring,
564 UShort_t sector,
565 UShort_t strip,
566 Float_t /* edep */,
567 UShort_t count1,
568 Short_t count2,
569 Short_t count3) const
570{
69b696b9 571 fmd->AddDigitByFields(detector, ring, sector, strip, count1, count2, count3);
4347b38f 572}
3d44ce66 573
4347b38f 574//____________________________________________________________________
575void
576AliFMDDigitizer::CheckDigit(Float_t /* edep */,
577 UShort_t nhits,
578 const TArrayI& counts)
579{
580 Int_t integral = counts[0];
581 if (counts[1] >= 0) integral += counts[1];
582 if (counts[2] >= 0) integral += counts[2];
583 integral -= Int_t(fPedestal + 2 * fPedestalWidth);
584 if (integral < 0) integral = 0;
585
586 Float_t convf = Float_t(fVA1MipRange) / fAltroChannelSize;
587 Float_t mips = integral * convf;
588 if (mips > Float_t(nhits) + .5 || mips < Float_t(nhits) - .5)
589 Warning("CheckDigit", "Digit -> %4.2f MIPS != %d +/- .5 hits",
590 mips, nhits);
591}
66d2ede1 592
4347b38f 593//====================================================================
925e6570 594ClassImp(AliFMDSDigitizer)
3d44ce66 595
4347b38f 596//____________________________________________________________________
597AliFMDSDigitizer::AliFMDSDigitizer()
598{
599 // Default ctor - don't use it
600}
88cb7938 601
4347b38f 602//____________________________________________________________________
603AliFMDSDigitizer::AliFMDSDigitizer(const Char_t* headerFile,
604 const Char_t* /* sdigfile */)
605 : AliFMDBaseDigitizer("FMDSDigitizer", "FMD SDigitizer")
606{
607 // Normal CTOR
608 AliDebug(1," processed");
3d44ce66 609
4347b38f 610 fRunLoader = AliRunLoader::GetRunLoader(); // Open(headerFile);
611 if (!fRunLoader)
612 Fatal("AliFMDSDigitizer", "cannot open session, header file '%s'",
613 headerFile);
614 AliLoader* loader = fRunLoader->GetLoader("FMDLoader");
615 if (!loader)
616 Fatal("AliFMDSDigitizer", "cannot find FMD loader in specified event");
3d44ce66 617
4347b38f 618 // Add task to tasks folder
619 loader->PostSDigitizer(this);
afddaa11 620
4347b38f 621}
88cb7938 622
4347b38f 623//____________________________________________________________________
624AliFMDSDigitizer::~AliFMDSDigitizer()
625{
626 AliLoader* loader = fRunLoader->GetLoader("FMDLoader");
627 loader->CleanSDigitizer();
628}
3d44ce66 629
4347b38f 630//____________________________________________________________________
631void
632AliFMDSDigitizer::Exec(Option_t*)
633{
634 // Get the output manager
635 if (!fRunLoader) {
636 Error("Exec", "Run loader is not set");
637 return;
638 }
639 if (!fRunLoader->GetAliRun()) fRunLoader->LoadgAlice();
640 if (!fRunLoader->TreeE()) fRunLoader->LoadHeader();
641
642 AliLoader* fmdLoader = fRunLoader->GetLoader("FMDLoader");
643 if (!fmdLoader) Fatal("Exec", "no FMD loader");
644
645 // Get the AliFMD object
646 AliFMD* fmd =
647 static_cast<AliFMD*>(fRunLoader->GetAliRun()->GetDetector("FMD"));
648 if (!fmd) {
649 AliError("Can not get FMD from gAlice");
650 return;
651 }
652
653 Int_t nEvents = Int_t(fRunLoader->TreeE()->GetEntries());
654 for (Int_t event = 0; event < nEvents; event++) {
655 AliDebug(1,Form(" Digitizing event number %d", event));
656 // Get the current loader
657 fRunLoader->GetEvent(event);
658
659 if (!fmdLoader->TreeS()) fmdLoader->MakeTree("S");
660 // Make a branch
661 fmd->MakeBranch("S");
662
663 // Cache contriutions
664 SumContributions(fmd);
665
666 // Digitize the event
667 DigitizeHits(fmd);
668
669 fmdLoader->TreeS()->Reset();
670 fmdLoader->TreeS()->Fill();
671 fmdLoader->WriteSDigits("OVERWRITE");
672 }
673}
66d2ede1 674
4347b38f 675//____________________________________________________________________
676void
677AliFMDSDigitizer::AddDigit(AliFMD* fmd,
678 UShort_t detector,
679 Char_t ring,
680 UShort_t sector,
681 UShort_t strip,
682 Float_t edep,
683 UShort_t count1,
684 Short_t count2,
685 Short_t count3) const
686{
69b696b9 687 fmd->AddSDigitByFields(detector, ring, sector, strip, edep,
688 count1, count2, count3);
66d2ede1 689}
4347b38f 690
691
692
693//____________________________________________________________________
694//
695// EOF
696//
88cb7938 697
698
699
66d2ede1 700