Removing extra semicolons (FedoraCore3, gcc 3.4.2)
[u/mrichter/AliRoot.git] / FMD / AliFMDDigitizer.cxx
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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
200#include "AliFMDHit.h" // ALIFMDHIT_H
201#include "AliFMDDigit.h" // ALIFMDDIGIT_H
56b1929b 202#include <AliRunDigitizer.h> // ALIRUNDIGITIZER_H
203#include <AliRun.h> // ALIRUN_H
204#include <AliLoader.h> // ALILOADER_H
205#include <AliRunLoader.h> // ALIRUNLOADER_H
4347b38f 206
207//____________________________________________________________________
925e6570 208ClassImp(AliFMDEdepMap)
4347b38f 209
210//====================================================================
925e6570 211ClassImp(AliFMDBaseDigitizer)
4347b38f 212
213//____________________________________________________________________
214AliFMDBaseDigitizer::AliFMDBaseDigitizer()
215 : fRunLoader(0)
66d2ede1 216{
4347b38f 217 // Default ctor - don't use it
66d2ede1 218}
219
4347b38f 220//____________________________________________________________________
221AliFMDBaseDigitizer::AliFMDBaseDigitizer(AliRunDigitizer* manager)
222 : AliDigitizer(manager, "AliFMDBaseDigitizer", "FMD Digitizer base class"),
223 fRunLoader(0),
e802be3e 224 fEdep(AliFMDMap::kMaxDetectors,
225 AliFMDMap::kMaxRings,
226 AliFMDMap::kMaxSectors,
227 AliFMDMap::kMaxStrips)
66d2ede1 228{
4347b38f 229 // Normal CTOR
102e9e9c 230 AliDebug(1," processed");
4347b38f 231 SetVA1MipRange();
232 SetAltroChannelSize();
233 SetSampleRate();
234 SetShapingTime();
66d2ede1 235}
236
4347b38f 237//____________________________________________________________________
238AliFMDBaseDigitizer::AliFMDBaseDigitizer(const Char_t* name,
239 const Char_t* title)
240 : AliDigitizer(name, title),
241 fRunLoader(0),
e802be3e 242 fEdep(AliFMDMap::kMaxDetectors,
243 AliFMDMap::kMaxRings,
244 AliFMDMap::kMaxSectors,
245 AliFMDMap::kMaxStrips)
66d2ede1 246{
4347b38f 247 // Normal CTOR
248 AliDebug(1," processed");
249 SetVA1MipRange();
250 SetAltroChannelSize();
251 SetSampleRate();
252 SetShapingTime();
253}
3d44ce66 254
4347b38f 255//____________________________________________________________________
256AliFMDBaseDigitizer::~AliFMDBaseDigitizer()
257{
258 // Destructor
66d2ede1 259}
260
4347b38f 261//____________________________________________________________________
262Bool_t
263AliFMDBaseDigitizer::Init()
66d2ede1 264{
4347b38f 265 // Initialization
266 return kTRUE;
66d2ede1 267}
268
88cb7938 269
4347b38f 270//____________________________________________________________________
271void
272AliFMDBaseDigitizer::SumContributions(AliFMD* fmd)
273{
274 // Sum energy deposited contributions from each hit in a cache
275 // (fEdep).
276 if (!fRunLoader)
277 Fatal("SumContributions", "no run loader");
278
279 // Clear array of deposited energies
280 fEdep.Clear();
281
282 // Get the FMD loader
283 AliLoader* inFMD = fRunLoader->GetLoader("FMDLoader");
284 // And load the hits
285 inFMD->LoadHits("READ");
286
287 // Get the tree of hits
288 TTree* hitsTree = inFMD->TreeH();
289 if (!hitsTree) {
290 // Try again
291 inFMD->LoadHits("READ");
292 hitsTree = inFMD->TreeH();
293 }
294
295 // Get the FMD branch
296 TBranch* hitsBranch = hitsTree->GetBranch("FMD");
297 if (hitsBranch) fmd->SetHitsAddressBranch(hitsBranch);
298 else AliFatal("Branch FMD hit not found");
299
300 // Get a list of hits from the FMD manager
301 TClonesArray *fmdHits = fmd->Hits();
302
303 // Get number of entries in the tree
304 Int_t ntracks = Int_t(hitsTree->GetEntries());
305
306 // Loop over the tracks in the
307 for (Int_t track = 0; track < ntracks; track++) {
308 // Read in entry number `track'
309 hitsBranch->GetEntry(track);
310
311 // Get the number of hits
312 Int_t nhits = fmdHits->GetEntries ();
313 for (Int_t hit = 0; hit < nhits; hit++) {
314 // Get the hit number `hit'
315 AliFMDHit* fmdHit =
316 static_cast<AliFMDHit*>(fmdHits->UncheckedAt(hit));
317
318 // Extract parameters
319 UShort_t detector = fmdHit->Detector();
320 Char_t ring = fmdHit->Ring();
321 UShort_t sector = fmdHit->Sector();
322 UShort_t strip = fmdHit->Strip();
323 Float_t edep = fmdHit->Edep();
e802be3e 324 if (fEdep(detector, ring, sector, strip).fEdep != 0)
4347b38f 325 AliDebug(1, Form("Double hit in %d%c(%d,%d)",
326 detector, ring, sector, strip));
327
e802be3e 328 fEdep(detector, ring, sector, strip).fEdep += edep;
329 fEdep(detector, ring, sector, strip).fN += 1;
4347b38f 330 // Add this to the energy deposited for this strip
331 } // hit loop
332 } // track loop
333}
66d2ede1 334
4347b38f 335//____________________________________________________________________
336void
337AliFMDBaseDigitizer::DigitizeHits(AliFMD* fmd) const
66d2ede1 338{
4347b38f 339 // For the stored energy contributions in the cache (fEdep), convert
340 // the energy signal to ADC counts, and store the created digit in
341 // the digits array (AliFMD::fDigits)
342 //
343 TArrayI counts(3);
344 for (UShort_t detector=1; detector <= 3; detector++) {
345 // Get pointer to subdetector
346 AliFMDSubDetector* det = 0;
347 switch (detector) {
348 case 1: det = fmd->GetFMD1(); break;
349 case 2: det = fmd->GetFMD2(); break;
350 case 3: det = fmd->GetFMD3(); break;
351 }
352 if (!det) continue;
353 for (UShort_t ringi = 0; ringi <= 1; ringi++) {
354 // Get pointer to Ring
355 AliFMDRing* r = 0;
356 switch (ringi) {
357 case 0: if (det->GetInner()) r = det->GetInner(); break;
358 case 1: if (det->GetOuter()) r = det->GetOuter(); break;
359 }
360 if (!r) continue;
361
362 // Get number of sectors
363 UShort_t nSectors = UShort_t(360. / r->GetTheta());
364 // Loop over the number of sectors
365 for (UShort_t sector = 0; sector < nSectors; sector++) {
366 // Get number of strips
367 UShort_t nStrips = r->GetNStrips();
368 // Loop over the stips
e802be3e 369 Float_t last = 0;
4347b38f 370 for (UShort_t strip = 0; strip < nStrips; strip++) {
e802be3e 371 // Reset the counter array to the invalid value -1
4347b38f 372 counts.Reset(-1);
e802be3e 373 // Reset the last `ADC' value when we've get to the end of a
374 // VA1_ALICE channel.
375 if (strip % 128 == 0) last = 0;
376
377 Float_t edep = fEdep(detector, r->GetId(), sector, strip).fEdep;
56b1929b 378 ConvertToCount(edep, last, r->GetSiThickness(),
379 fmd->GetSiDensity(), counts);
e802be3e 380 last = edep;
4347b38f 381 AddDigit(fmd, detector, r->GetId(), sector, strip,
382 edep, UShort_t(counts[0]),
383 Short_t(counts[1]), Short_t(counts[2]));
384#if 0
385 // This checks if the digit created will give the `right'
386 // number of particles when reconstructed, using a naiive
387 // approach. It's here only as a quality check - nothing
388 // else.
e802be3e 389 CheckDigit(fEdep(detector, r->GetId(), sector, strip).fEdep,
390 fEdep(detector, r->GetId(), sector, strip).fN,
4347b38f 391 counts);
392#endif
393 } // Strip
394 } // Sector
395 } // Ring
396 } // Detector
397}
88cb7938 398
4347b38f 399//____________________________________________________________________
4347b38f 400void
401AliFMDBaseDigitizer::ConvertToCount(Float_t edep,
e802be3e 402 Float_t last,
4347b38f 403 Float_t siThickness,
404 Float_t siDensity,
405 TArrayI& counts) const
406{
e802be3e 407 // Convert the total energy deposited to a (set of) ADC count(s).
4347b38f 408 //
e802be3e 409 // This is done by
410 //
411 // Energy_Deposited ALTRO_Channel_Size
412 // ADC = -------------------------- ------------------- + pedestal
413 // Energy_Deposition_Of_1_MIP VA1_ALICE_MIP_Range
4347b38f 414 //
e802be3e 415 // Energy_Deposited fAltroChannelSize
416 // = --------------------------------- ----------------- + pedestal
417 // 1.664 * Si_Thickness * Si_Density fVA1MipRange
418 //
4347b38f 419 //
e802be3e 420 // = Energy_Deposited * ConversionFactor + pedestal
421 //
422 // However, this is modified by the response function of the
423 // VA1_ALICE pre-amp. chip in case we are doing oversampling of the
424 // VA1_ALICE output.
425 //
426 // In that case, we get N=fSampleRate values of the ADC, and the
427 // `EnergyDeposited' is a function of which sample where are
428 // calculating the ADC for
429 //
430 // ADC_i = f(EnergyDeposited, i/N, Last) * ConversionFactor + pedestal
431 //
432 // where Last is the Energy deposited in the previous strip.
433 //
434 // Here, f is the shaping function of the VA1_ALICE. This is given
435 // by
436 //
437 // | (E - l) * (1 - exp(-B * t) + l if E > l
438 // f(E, t, l) = <
439 // | (l - E) * exp(-B * t) + E otherwise
440 //
441 //
442 // = E + (l - E) * ext(-B * t)
443 //
444 const Float_t mipEnergy = 1.664 * siThickness * siDensity;
445 const Float_t convf = (1 / mipEnergy * Float_t(fAltroChannelSize)
446 / fVA1MipRange);
447 UShort_t ped = MakePedestal();
448
449 // In case we don't oversample, just return the end value.
450 if (fSampleRate == 1) {
451 counts[0] = UShort_t(TMath::Min(edep * convf + ped,
452 Float_t(fAltroChannelSize)));
453 return;
454 }
455
4347b38f 456 // Create a pedestal
e802be3e 457 Int_t n = fSampleRate;
458 Float_t B = fShapingTime;
4347b38f 459 for (Ssiz_t i = 0; i < n; i++) {
e802be3e 460 Float_t t = Float_t(i) / n;
461 Float_t s = edep + (last - edep) * TMath::Exp(-B * t);
462 counts[i] = UShort_t(TMath::Min(s * convf + ped,
4347b38f 463 Float_t(fAltroChannelSize)));
464 }
465}
88cb7938 466
3d44ce66 467
4347b38f 468//====================================================================
925e6570 469ClassImp(AliFMDDigitizer)
66d2ede1 470
4347b38f 471//____________________________________________________________________
472AliFMDDigitizer::AliFMDDigitizer()
473 : AliFMDBaseDigitizer()
474{
475 // Default ctor - don't use it
476}
66d2ede1 477
4347b38f 478//____________________________________________________________________
479AliFMDDigitizer::AliFMDDigitizer(AliRunDigitizer* manager)
480 : AliFMDBaseDigitizer(manager)
481{
482 // Normal CTOR
483 AliDebug(1," processed");
484 SetPedestal();
485}
66d2ede1 486
4347b38f 487//____________________________________________________________________
488void
489AliFMDDigitizer::Exec(Option_t*)
490{
491 // Get the output manager
492 TString outFolder(fManager->GetOutputFolderName());
493 AliRunLoader* out =
494 AliRunLoader::GetRunLoader(outFolder.Data());
495 // Get the FMD output manager
496 AliLoader* outFMD = out->GetLoader("FMDLoader");
497
498 // Get the input loader
499 TString inFolder(fManager->GetInputFolderName(0));
500 fRunLoader =
501 AliRunLoader::GetRunLoader(fManager->GetInputFolderName(0));
502 if (!fRunLoader) {
503 AliError("Can not find Run Loader for input stream 0");
504 return;
505 }
506 // Get the AliRun object
507 if (!fRunLoader->GetAliRun()) fRunLoader->LoadgAlice();
508
509 // Get the AliFMD object
510 AliFMD* fmd = static_cast<AliFMD*>(fRunLoader->GetAliRun()->GetDetector("FMD"));
511 if (!fmd) {
512 AliError("Can not get FMD from gAlice");
513 return;
514 }
515
516 Int_t nFiles= fManager->GetNinputs();
517 for (Int_t inputFile = 0; inputFile < nFiles; inputFile++) {
518 AliDebug(1,Form(" Digitizing event number %d",
519 fManager->GetOutputEventNr()));
520 // Get the current loader
521 fRunLoader =
522 AliRunLoader::GetRunLoader(fManager->GetInputFolderName(inputFile));
523 if (!fRunLoader) Fatal("Exec", "no run loader");
524 // Cache contriutions
525 SumContributions(fmd);
526 }
527 // Digitize the event
528 DigitizeHits(fmd);
529
530 // Load digits from the tree
531 outFMD->LoadDigits("update");
532 // Get the tree of digits
533 TTree* digitTree = outFMD->TreeD();
534 if (!digitTree) {
535 outFMD->MakeTree("D");
536 digitTree = outFMD->TreeD();
537 }
538 digitTree->Reset();
539 // Make a branch in the tree
540 TClonesArray* digits = fmd->Digits();
541 fmd->MakeBranchInTree(digitTree, fmd->GetName(), &(digits), 4000, 0);
542 // TBranch* digitBranch = digitTree->GetBranch(fmd->GetName());
543 // Fill the tree
544 digitTree->Fill();
66d2ede1 545
4347b38f 546 // Write the digits to disk
547 outFMD->WriteDigits("OVERWRITE");
548 outFMD->UnloadHits();
549 outFMD->UnloadDigits();
4110645f 550
4347b38f 551 // Reset the digits in the AliFMD object
552 fmd->ResetDigits();
553}
3d44ce66 554
88cb7938 555
4347b38f 556//____________________________________________________________________
557UShort_t
558AliFMDDigitizer::MakePedestal() const
559{
560 return UShort_t(TMath::Max(gRandom->Gaus(fPedestal, fPedestalWidth), 0.));
561}
88cb7938 562
4347b38f 563//____________________________________________________________________
564void
565AliFMDDigitizer::AddDigit(AliFMD* fmd,
566 UShort_t detector,
567 Char_t ring,
568 UShort_t sector,
569 UShort_t strip,
570 Float_t /* edep */,
571 UShort_t count1,
572 Short_t count2,
573 Short_t count3) const
574{
575 fmd->AddDigit(detector, ring, sector, strip, count1, count2, count3);
576}
3d44ce66 577
4347b38f 578//____________________________________________________________________
579void
580AliFMDDigitizer::CheckDigit(Float_t /* edep */,
581 UShort_t nhits,
582 const TArrayI& counts)
583{
584 Int_t integral = counts[0];
585 if (counts[1] >= 0) integral += counts[1];
586 if (counts[2] >= 0) integral += counts[2];
587 integral -= Int_t(fPedestal + 2 * fPedestalWidth);
588 if (integral < 0) integral = 0;
589
590 Float_t convf = Float_t(fVA1MipRange) / fAltroChannelSize;
591 Float_t mips = integral * convf;
592 if (mips > Float_t(nhits) + .5 || mips < Float_t(nhits) - .5)
593 Warning("CheckDigit", "Digit -> %4.2f MIPS != %d +/- .5 hits",
594 mips, nhits);
595}
66d2ede1 596
4347b38f 597//====================================================================
925e6570 598ClassImp(AliFMDSDigitizer)
3d44ce66 599
4347b38f 600//____________________________________________________________________
601AliFMDSDigitizer::AliFMDSDigitizer()
602{
603 // Default ctor - don't use it
604}
88cb7938 605
4347b38f 606//____________________________________________________________________
607AliFMDSDigitizer::AliFMDSDigitizer(const Char_t* headerFile,
608 const Char_t* /* sdigfile */)
609 : AliFMDBaseDigitizer("FMDSDigitizer", "FMD SDigitizer")
610{
611 // Normal CTOR
612 AliDebug(1," processed");
3d44ce66 613
4347b38f 614 fRunLoader = AliRunLoader::GetRunLoader(); // Open(headerFile);
615 if (!fRunLoader)
616 Fatal("AliFMDSDigitizer", "cannot open session, header file '%s'",
617 headerFile);
618 AliLoader* loader = fRunLoader->GetLoader("FMDLoader");
619 if (!loader)
620 Fatal("AliFMDSDigitizer", "cannot find FMD loader in specified event");
3d44ce66 621
4347b38f 622 // Add task to tasks folder
623 loader->PostSDigitizer(this);
afddaa11 624
4347b38f 625}
88cb7938 626
4347b38f 627//____________________________________________________________________
628AliFMDSDigitizer::~AliFMDSDigitizer()
629{
630 AliLoader* loader = fRunLoader->GetLoader("FMDLoader");
631 loader->CleanSDigitizer();
632}
3d44ce66 633
4347b38f 634//____________________________________________________________________
635void
636AliFMDSDigitizer::Exec(Option_t*)
637{
638 // Get the output manager
639 if (!fRunLoader) {
640 Error("Exec", "Run loader is not set");
641 return;
642 }
643 if (!fRunLoader->GetAliRun()) fRunLoader->LoadgAlice();
644 if (!fRunLoader->TreeE()) fRunLoader->LoadHeader();
645
646 AliLoader* fmdLoader = fRunLoader->GetLoader("FMDLoader");
647 if (!fmdLoader) Fatal("Exec", "no FMD loader");
648
649 // Get the AliFMD object
650 AliFMD* fmd =
651 static_cast<AliFMD*>(fRunLoader->GetAliRun()->GetDetector("FMD"));
652 if (!fmd) {
653 AliError("Can not get FMD from gAlice");
654 return;
655 }
656
657 Int_t nEvents = Int_t(fRunLoader->TreeE()->GetEntries());
658 for (Int_t event = 0; event < nEvents; event++) {
659 AliDebug(1,Form(" Digitizing event number %d", event));
660 // Get the current loader
661 fRunLoader->GetEvent(event);
662
663 if (!fmdLoader->TreeS()) fmdLoader->MakeTree("S");
664 // Make a branch
665 fmd->MakeBranch("S");
666
667 // Cache contriutions
668 SumContributions(fmd);
669
670 // Digitize the event
671 DigitizeHits(fmd);
672
673 fmdLoader->TreeS()->Reset();
674 fmdLoader->TreeS()->Fill();
675 fmdLoader->WriteSDigits("OVERWRITE");
676 }
677}
66d2ede1 678
4347b38f 679//____________________________________________________________________
680void
681AliFMDSDigitizer::AddDigit(AliFMD* fmd,
682 UShort_t detector,
683 Char_t ring,
684 UShort_t sector,
685 UShort_t strip,
686 Float_t edep,
687 UShort_t count1,
688 Short_t count2,
689 Short_t count3) const
690{
691 fmd->AddSDigit(detector, ring, sector, strip, edep, count1, count2, count3);
66d2ede1 692}
4347b38f 693
694
695
696//____________________________________________________________________
697//
698// EOF
699//
88cb7938 700
701
702
66d2ede1 703