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4 * Author: The ALICE Off-line Project. *
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14 **************************************************************************/
18 //-- Author: Yves Schutz (SUBATECH) & Dmitri Peressounko (SUBATECH & Kurchatov Institute)
19 // August 2002 Yves Schutz: clone PHOS as closely as possible and intoduction
20 // of new IO (à la PHOS)
21 // Mar 2007, Aleksei Pavlinov - new algoritmh of pseudo clusters
22 //////////////////////////////////////////////////////////////////////////////
23 // Clusterization class. Performs clusterization (collects neighbouring active cells) and
24 // unfolds the clusters having several local maxima.
25 // Results are stored in TreeR#, branches EMCALTowerRP (EMC recPoints),
26 // EMCALPreShoRP (CPV RecPoints) and AliEMCALClusterizer (Clusterizer with all
27 // parameters including input digits branch title, thresholds etc.)
28 // This TTask is normally called from Reconstructioner, but can as well be used in
31 // root [0] AliEMCALClusterizerv1 * cl = new AliEMCALClusterizerv1("galice.root")
32 // Warning in <TDatabasePDG::TDatabasePDG>: object already instantiated
33 // //reads gAlice from header file "..."
34 // root [1] cl->ExecuteTask()
35 // //finds RecPoints in all events stored in galice.root
36 // root [2] cl->SetDigitsBranch("digits2")
37 // //sets another title for Digitis (input) branch
38 // root [3] cl->SetRecPointsBranch("recp2")
39 // //sets another title four output branches
40 // root [4] cl->SetTowerLocalMaxCut(0.03)
41 // //set clusterization parameters
42 // root [5] cl->ExecuteTask("deb all time")
43 // //once more finds RecPoints options are
44 // // deb - print number of found rec points
45 // // deb all - print number of found RecPoints and some their characteristics
46 // // time - print benchmarking results
48 // --- ROOT system ---
59 #include <TBenchmark.h>
63 // --- Standard library ---
66 // --- AliRoot header files ---
67 #include "AliRunLoader.h"
70 #include "AliEMCALClusterizerv1.h"
71 #include "AliEMCALRecPoint.h"
72 #include "AliEMCALDigit.h"
73 #include "AliEMCALDigitizer.h"
75 #include "AliEMCALGeometry.h"
76 #include "AliEMCALRecParam.h"
77 #include "AliEMCALReconstructor.h"
78 #include "AliCDBManager.h"
79 #include "AliCaloCalibPedestal.h"
80 #include "AliEMCALCalibData.h"
82 #include "AliCDBEntry.h"
84 ClassImp(AliEMCALClusterizerv1)
86 //____________________________________________________________________________
87 AliEMCALClusterizerv1::AliEMCALClusterizerv1()
88 : AliEMCALClusterizer(),
92 fNumberOfECAClusters(0),fCalibData(0),fCaloPed(0),
93 fADCchannelECA(0.),fADCpedestalECA(0.),fECAClusteringThreshold(0.),fECALocMaxCut(0.),
94 fECAW0(0.),fTimeCut(1.),fTimeMin(-1.),fTimeMax(1.),fMinECut(0.)
96 // ctor with the indication of the file where header Tree and digits Tree are stored
101 //____________________________________________________________________________
102 AliEMCALClusterizerv1::AliEMCALClusterizerv1(AliEMCALGeometry* geometry)
103 : AliEMCALClusterizer(),
105 fDefaultInit(kFALSE),
107 fNumberOfECAClusters(0),fCalibData(0), fCaloPed(0),
108 fADCchannelECA(0.),fADCpedestalECA(0.),fECAClusteringThreshold(0.),fECALocMaxCut(0.),
109 fECAW0(0.),fTimeCut(1.),fTimeMin(-1.),fTimeMax(1.),fMinECut(0.)
111 // ctor with the indication of the file where header Tree and digits Tree are stored
112 // use this contructor to avoid usage of Init() which uses runloader
113 // change needed by HLT - MP
115 // Note for the future: the use on runloader should be avoided or optional at least
116 // another way is to make Init virtual and protected at least such that the deriving classes can overload
122 AliFatal("Geometry not initialized.");
126 gMinuit = new TMinuit(100) ;
130 //____________________________________________________________________________
131 AliEMCALClusterizerv1::AliEMCALClusterizerv1(AliEMCALGeometry* geometry, AliEMCALCalibData * calib, AliCaloCalibPedestal * caloped)
132 : AliEMCALClusterizer(),
134 fDefaultInit(kFALSE),
136 fNumberOfECAClusters(0),fCalibData(calib), fCaloPed(caloped),
137 fADCchannelECA(0.),fADCpedestalECA(0.),fECAClusteringThreshold(0.),fECALocMaxCut(0.),
138 fECAW0(0.),fTimeCut(1.),fTimeMin(-1.),fTimeMax(1.),fMinECut(0.)
140 // ctor, geometry and calibration are initialized elsewhere.
143 AliFatal("Geometry not initialized.");
146 gMinuit = new TMinuit(100) ;
151 //____________________________________________________________________________
152 AliEMCALClusterizerv1::~AliEMCALClusterizerv1()
157 //____________________________________________________________________________
158 Float_t AliEMCALClusterizerv1::Calibrate(const Float_t amp, const Float_t time, const Int_t absId)
161 // Convert digitized amplitude into energy.
162 // Calibration parameters are taken from calibration data base for raw data,
163 // or from digitizer parameters for simulated data.
168 AliFatal("Did not get geometry from EMCALLoader") ;
177 Bool_t bCell = fGeom->GetCellIndex(absId, iSupMod, nModule, nIphi, nIeta) ;
179 fGeom->PrintGeometry();
180 Error("Calibrate()"," Wrong cell id number : %i", absId);
184 fGeom->GetCellPhiEtaIndexInSModule(iSupMod,nModule,nIphi, nIeta,iphi,ieta);
186 // Check if channel is bad (dead or hot), in this case return 0.
187 // Gustavo: 15-12-09 In case of RAW data this selection is already done, but not in simulation.
188 // for the moment keep it here but remember to do the selection at the sdigitizer level
189 // and remove it from here
190 Int_t channelStatus = (Int_t)(fCaloPed->GetDeadMap(iSupMod))->GetBinContent(ieta,iphi);
191 if(channelStatus == AliCaloCalibPedestal::kHot || channelStatus == AliCaloCalibPedestal::kDead) {
192 AliDebug(2,Form("Tower from SM %d, ieta %d, iphi %d is BAD : status %d !!!",iSupMod,ieta,iphi, channelStatus));
195 //Check if time is too large or too small, indication of a noisy channel, remove in this case
196 if(time > fTimeMax || time < fTimeMin) return 0;
198 fADCchannelECA = fCalibData->GetADCchannel (iSupMod,ieta,iphi);
199 fADCpedestalECA = fCalibData->GetADCpedestal(iSupMod,ieta,iphi);
201 return -fADCpedestalECA + amp * fADCchannelECA ;
204 else //Return energy with default parameters if calibration is not available
205 return -fADCpedestalECA + amp * fADCchannelECA ;
209 //____________________________________________________________________________
210 void AliEMCALClusterizerv1::Digits2Clusters(Option_t * option)
212 // Steering method to perform clusterization for the current event
215 if(strstr(option,"tim"))
216 gBenchmark->Start("EMCALClusterizer");
218 if(strstr(option,"print"))
221 //Get calibration parameters from file or digitizer default values.
222 GetCalibrationParameters() ;
224 //Get dead channel map from file or digitizer default values.
225 GetCaloCalibPedestal() ;
227 fNumberOfECAClusters = 0;
229 MakeClusters() ; //only the real clusters
236 //Evaluate position, dispersion and other RecPoint properties for EC section
237 for(index = 0; index < fRecPoints->GetEntries(); index++) {
238 dynamic_cast<AliEMCALRecPoint *>(fRecPoints->At(index))->EvalAll(fECAW0,fDigitsArr) ;
239 //For each rec.point set the distance to the nearest bad crystal
240 dynamic_cast<AliEMCALRecPoint *>(fRecPoints->At(index))->EvalDistanceToBadChannels(fCaloPed);
245 for(index = 0; index < fRecPoints->GetEntries(); index++) {
246 (dynamic_cast<AliEMCALRecPoint *>(fRecPoints->At(index)))->SetIndexInList(index) ;
247 (dynamic_cast<AliEMCALRecPoint *>(fRecPoints->At(index)))->Print();
252 if(strstr(option,"deb") || strstr(option,"all"))
253 PrintRecPoints(option) ;
255 AliDebug(1,Form("EMCAL Clusterizer found %d Rec Points",fRecPoints->GetEntriesFast()));
257 fRecPoints->Delete();
259 if(strstr(option,"tim")){
260 gBenchmark->Stop("EMCALClusterizer");
261 printf("Exec took %f seconds for Clusterizing",
262 gBenchmark->GetCpuTime("EMCALClusterizer"));
266 //____________________________________________________________________________
267 Bool_t AliEMCALClusterizerv1::FindFit(AliEMCALRecPoint * recPoint, AliEMCALDigit ** maxAt,
268 const Float_t* maxAtEnergy,
269 Int_t nPar, Float_t * fitparameters) const
271 // Calls TMinuit to fit the energy distribution of a cluster with several maxima
272 // The initial values for fitting procedure are set equal to the
273 // positions of local maxima.
274 // Cluster will be fitted as a superposition of nPar/3
275 // electromagnetic showers
277 if (fGeom==0) AliFatal("Did not get geometry from EMCALLoader");
279 gMinuit->mncler(); // Reset Minuit's list of paramters
280 gMinuit->SetPrintLevel(-1) ; // No Printout
281 gMinuit->SetFCN(AliEMCALClusterizerv1::UnfoldingChiSquare) ;
282 // To set the address of the minimization function
283 TList * toMinuit = new TList();
284 toMinuit->AddAt(recPoint,0) ;
285 toMinuit->AddAt(fDigitsArr,1) ;
286 toMinuit->AddAt(fGeom,2) ;
288 gMinuit->SetObjectFit(toMinuit) ; // To tranfer pointer to UnfoldingChiSquare
290 // filling initial values for fit parameters
291 AliEMCALDigit * digit ;
295 Int_t nDigits = (Int_t) nPar / 3 ;
299 for(iDigit = 0; iDigit < nDigits; iDigit++){
300 digit = maxAt[iDigit];
305 fGeom->RelPosCellInSModule(digit->GetId(), y, x, z);
307 Float_t energy = maxAtEnergy[iDigit] ;
309 gMinuit->mnparm(index, "x", x, 0.1, 0, 0, ierflg) ;
312 Error("FindFit", "EMCAL Unfolding Unable to set initial value for fit procedure : x = %f", x ) ;
315 gMinuit->mnparm(index, "z", z, 0.1, 0, 0, ierflg) ;
318 Error("FindFit", "EMCAL Unfolding Unable to set initial value for fit procedure : z = %f", z) ;
321 gMinuit->mnparm(index, "Energy", energy , 0.05*energy, 0., 4.*energy, ierflg) ;
324 Error("FindFit", "EMCAL Unfolding Unable to set initial value for fit procedure : energy = %f", energy) ;
329 Double_t p0 = 0.1 ; // "Tolerance" Evaluation stops when EDM = 0.0001*p0 ;
330 // The number of function call slightly depends on it.
331 //Double_t p1 = 1.0 ;
334 gMinuit->mnexcm("SET STR", &p2, 0, ierflg) ; // force TMinuit to reduce function calls
335 // gMinuit->mnexcm("SET GRA", &p1, 1, ierflg) ; // force TMinuit to use my gradient
336 gMinuit->SetMaxIterations(5);
337 gMinuit->mnexcm("SET NOW", &p2 , 0, ierflg) ; // No Warnings
338 gMinuit->mnexcm("MIGRAD", &p0, 0, ierflg) ; // minimize
340 if(ierflg == 4){ // Minimum not found
341 Error("FindFit", "EMCAL Unfolding Fit not converged, cluster abandoned " ) ;
344 for(index = 0; index < nPar; index++){
347 gMinuit->GetParameter(index, val, err) ; // Returns value and error of parameter index
348 fitparameters[index] = val ;
356 //____________________________________________________________________________
357 void AliEMCALClusterizerv1::GetCalibrationParameters()
359 // Set calibration parameters:
360 // if calibration database exists, they are read from database,
361 // otherwise, they are taken from digitizer.
363 // It is a user responsilibity to open CDB before reconstruction,
365 // AliCDBStorage* storage = AliCDBManager::Instance()->GetStorage("local://CalibDB");
367 //Check if calibration is stored in data base
371 AliCDBEntry *entry = (AliCDBEntry*)
372 AliCDBManager::Instance()->Get("EMCAL/Calib/Data");
373 if (entry) fCalibData = (AliEMCALCalibData*) entry->GetObject();
377 AliFatal("Calibration parameters not found in CDB!");
381 //____________________________________________________________________________
382 void AliEMCALClusterizerv1::GetCaloCalibPedestal()
384 // Set calibration parameters:
385 // if calibration database exists, they are read from database,
386 // otherwise, they are taken from digitizer.
388 // It is a user responsilibity to open CDB before reconstruction,
390 // AliCDBStorage* storage = AliCDBManager::Instance()->GetStorage("local://CalibDB");
392 //Check if calibration is stored in data base
396 AliCDBEntry *entry = (AliCDBEntry*)
397 AliCDBManager::Instance()->Get("EMCAL/Calib/Pedestals");
398 if (entry) fCaloPed = (AliCaloCalibPedestal*) entry->GetObject();
402 AliFatal("Pedestal info not found in CDB!");
407 //____________________________________________________________________________
408 void AliEMCALClusterizerv1::Init()
410 // Make all memory allocations which can not be done in default constructor.
411 // Attach the Clusterizer task to the list of EMCAL tasks
413 AliRunLoader *rl = AliRunLoader::Instance();
414 if (rl->GetAliRun() && rl->GetAliRun()->GetDetector("EMCAL"))
415 fGeom = dynamic_cast<AliEMCAL*>(rl->GetAliRun()->GetDetector("EMCAL"))->GetGeometry();
417 fGeom = AliEMCALGeometry::GetInstance(AliEMCALGeometry::GetDefaultGeometryName());
419 AliDebug(1,Form("geom 0x%x",fGeom));
422 gMinuit = new TMinuit(100) ;
426 //____________________________________________________________________________
427 void AliEMCALClusterizerv1::InitParameters()
429 // Initializes the parameters for the Clusterizer
430 fNumberOfECAClusters = 0;
435 const AliEMCALRecParam* recParam = AliEMCALReconstructor::GetRecParam();
437 AliFatal("Reconstruction parameters for EMCAL not set!");
439 fECAClusteringThreshold = recParam->GetClusteringThreshold();
440 fECAW0 = recParam->GetW0();
441 fMinECut = recParam->GetMinECut();
442 fToUnfold = recParam->GetUnfold();
443 if(fToUnfold) AliWarning("Cluster Unfolding ON. Implementing only for eta=0 case!!!");
444 fECALocMaxCut = recParam->GetLocMaxCut();
445 fTimeCut = recParam->GetTimeCut();
446 fTimeMin = recParam->GetTimeMin();
447 fTimeMax = recParam->GetTimeMax();
449 AliDebug(1,Form("Reconstruction parameters: fECAClusteringThreshold=%.3f GeV, fECAW=%.3f, fMinECut=%.3f GeV, fToUnfold=%d, fECALocMaxCut=%.3f GeV, fTimeCut=%e s,fTimeMin=%e s,fTimeMax=%e s",
450 fECAClusteringThreshold,fECAW0,fMinECut,fToUnfold,fECALocMaxCut,fTimeCut, fTimeMin, fTimeMax));
455 //____________________________________________________________________________
456 Int_t AliEMCALClusterizerv1::AreNeighbours(AliEMCALDigit * d1, AliEMCALDigit * d2, Bool_t & shared) const
458 // Gives the neighbourness of two digits = 0 are not neighbour ; continue searching
460 // = 2 is in different SM; continue searching
461 // In case it is in different SM, but same phi rack, check if neigbours at eta=0
462 // neighbours are defined as digits having at least a common side
463 // The order of d1 and d2 is important: first (d1) should be a digit already in a cluster
464 // which is compared to a digit (d2) not yet in a cluster
466 static Int_t nSupMod1=0, nModule1=0, nIphi1=0, nIeta1=0, iphi1=0, ieta1=0;
467 static Int_t nSupMod2=0, nModule2=0, nIphi2=0, nIeta2=0, iphi2=0, ieta2=0;
468 static Int_t rowdiff, coldiff;
472 fGeom->GetCellIndex(d1->GetId(), nSupMod1,nModule1,nIphi1,nIeta1);
473 fGeom->GetCellIndex(d2->GetId(), nSupMod2,nModule2,nIphi2,nIeta2);
474 fGeom->GetCellPhiEtaIndexInSModule(nSupMod1,nModule1,nIphi1,nIeta1, iphi1,ieta1);
475 fGeom->GetCellPhiEtaIndexInSModule(nSupMod2,nModule2,nIphi2,nIeta2, iphi2,ieta2);
477 //If different SM, check if they are in the same phi, then consider cells close to eta=0 as neighbours; May 2010
478 if(nSupMod1 != nSupMod2 ) {
479 //Check if the 2 SM are in the same PHI position (0,1), (2,3), ...
480 Float_t smPhi1 = fGeom->GetEMCGeometry()->GetPhiCenterOfSM(nSupMod1);
481 Float_t smPhi2 = fGeom->GetEMCGeometry()->GetPhiCenterOfSM(nSupMod2);
483 if(!TMath::AreEqualAbs(smPhi1, smPhi2, 1e-3)) return 2; //Not phi rack equal, not neighbours
485 // In case of a shared cluster, index of SM in C side, columns start at 48 and ends at 48*2
486 // C Side impair SM, nSupMod%2=1; A side pair SM nSupMod%2=0
487 if(nSupMod1%2) ieta1+=AliEMCALGeoParams::fgkEMCALCols;
488 else ieta2+=AliEMCALGeoParams::fgkEMCALCols;
490 shared = kTRUE; // maybe a shared cluster, we know this later, set it for the moment.
492 }//Different SM, same phi
494 rowdiff = TMath::Abs(iphi1 - iphi2);
495 coldiff = TMath::Abs(ieta1 - ieta2) ;
497 // neighbours with at least common side; May 11, 2007
498 if ((coldiff==0 && TMath::Abs(rowdiff)==1) || (rowdiff==0 && TMath::Abs(coldiff)==1)) {
500 //if ((coldiff==0 && TMath::Abs(rowdiff==1)) || (rowdiff==0 && TMath::Abs(coldiff==1)) || (TMath::Abs(rowdiff)==1 && TMath::Abs(coldiff==1))) rv = 1;
503 printf("AliEMCALClusterizerv1::AreNeighbours(): id1=%d, (row %d, col %d) ; id2=%d, (row %d, col %d), shared %d \n",
504 d1->GetId(), iphi1,ieta1, d2->GetId(), iphi2,ieta2, shared);
514 //____________________________________________________________________________
515 void AliEMCALClusterizerv1::MakeClusters()
517 // Steering method to construct the clusters stored in a list of Reconstructed Points
518 // A cluster is defined as a list of neighbour digits
519 // Mar 03, 2007 by PAI
521 if (fGeom==0) AliFatal("Did not get geometry from EMCALLoader");
525 // Set up TObjArray with pointers to digits to work on
526 TObjArray *digitsC = new TObjArray();
527 TIter nextdigit(fDigitsArr);
528 AliEMCALDigit *digit;
529 while ( (digit = dynamic_cast<AliEMCALDigit*>(nextdigit())) ) {
530 digitsC->AddLast(digit);
533 double e = 0.0, ehs = 0.0;
534 TIter nextdigitC(digitsC);
535 while ( (digit = dynamic_cast<AliEMCALDigit *>(nextdigitC())) ) { // clean up digits
536 e = Calibrate(digit->GetAmplitude(), digit->GetTime(),digit->GetId());//Time or TimeR?
537 if ( e < fMinECut) //|| digit->GetTimeR() > fTimeCut ) // time window of cell checked in calibrate
538 digitsC->Remove(digit);
542 AliDebug(1,Form("MakeClusters: Number of digits %d -> (e %f), ehs %d\n",
543 fDigitsArr->GetEntries(),fMinECut,ehs));
547 while ( (digit = dynamic_cast<AliEMCALDigit *>(nextdigitC())) ) { // scan over the list of digitsC
548 TArrayI clusterECAdigitslist(fDigitsArr->GetEntries());
550 if(fGeom->CheckAbsCellId(digit->GetId()) && (Calibrate(digit->GetAmplitude(), digit->GetTime(),digit->GetId()) > fECAClusteringThreshold ) ){
551 // start a new Tower RecPoint
552 if(fNumberOfECAClusters >= fRecPoints->GetSize()) fRecPoints->Expand(2*fNumberOfECAClusters+1) ;
554 AliEMCALRecPoint *recPoint = new AliEMCALRecPoint("") ;
555 fRecPoints->AddAt(recPoint, fNumberOfECAClusters) ;
556 recPoint = dynamic_cast<AliEMCALRecPoint *>(fRecPoints->At(fNumberOfECAClusters)) ;
557 fNumberOfECAClusters++ ;
559 recPoint->SetClusterType(AliESDCaloCluster::kEMCALClusterv1);
561 recPoint->AddDigit(*digit, Calibrate(digit->GetAmplitude(), digit->GetTime(),digit->GetId()),kFALSE) ; //Time or TimeR?
562 TObjArray clusterDigits;
563 clusterDigits.AddLast(digit);
564 digitsC->Remove(digit) ;
566 AliDebug(1,Form("MakeClusters: OK id = %d, ene = %f , cell.th. = %f \n", digit->GetId(),
567 Calibrate(digit->GetAmplitude(),digit->GetTime(),digit->GetId()), fECAClusteringThreshold)); //Time or TimeR?
568 Float_t time = digit->GetTime();//Time or TimeR?
569 // Grow cluster by finding neighbours
570 TIter nextClusterDigit(&clusterDigits);
571 while ( (digit = dynamic_cast<AliEMCALDigit*>(nextClusterDigit())) ) { // scan over digits in cluster
572 TIter nextdigitN(digitsC);
573 AliEMCALDigit *digitN = 0; // digi neighbor
574 while ( (digitN = (AliEMCALDigit *)nextdigitN()) ) { // scan over all digits to look for neighbours
576 //Do not add digits with too different time
577 Bool_t shared = kFALSE;//cluster shared by 2 SuperModules?
578 if(TMath::Abs(time - digitN->GetTime()) > fTimeCut ) continue; //Time or TimeR?
579 if (AreNeighbours(digit, digitN, shared)==1) { // call (digit,digitN) in THAT order !!!!!
580 recPoint->AddDigit(*digitN, Calibrate(digitN->GetAmplitude(), digitN->GetTime(), digitN->GetId()),shared) ;//Time or TimeR?
581 clusterDigits.AddLast(digitN) ;
582 digitsC->Remove(digitN) ;
584 } // scan over digits
585 } // scan over digits already in cluster
588 AliDebug(2,Form("MakeClusters: %d digitd, energy %f \n", clusterDigits.GetEntries(), recPoint->GetEnergy()));
594 AliDebug(1,Form("total no of clusters %d from %d digits",fNumberOfECAClusters,fDigitsArr->GetEntriesFast()));
597 //____________________________________________________________________________
598 void AliEMCALClusterizerv1::MakeUnfolding()
600 // Unfolds clusters using the shape of an ElectroMagnetic shower
601 // Performs unfolding of all clusters
603 if(fNumberOfECAClusters > 0){
605 AliFatal("Did not get geometry from EMCALLoader") ;
606 Int_t nModulesToUnfold = fGeom->GetNCells();
608 Int_t numberofNotUnfolded = fNumberOfECAClusters ;
610 for(index = 0 ; index < numberofNotUnfolded ; index++){
612 AliEMCALRecPoint * recPoint = dynamic_cast<AliEMCALRecPoint *>( fRecPoints->At(index) ) ;
616 recPoint->GetGlobalPosition(gpos);
617 fGeom->GetAbsCellIdFromEtaPhi(gpos.Eta(),gpos.Phi(),absId);
618 if(absId > nModulesToUnfold)
621 Int_t nMultipl = recPoint->GetMultiplicity() ;
622 AliEMCALDigit ** maxAt = new AliEMCALDigit*[nMultipl] ;
623 Float_t * maxAtEnergy = new Float_t[nMultipl] ;
624 Int_t nMax = recPoint->GetNumberOfLocalMax(maxAt, maxAtEnergy,fECALocMaxCut,fDigitsArr) ;
626 if( nMax > 1 ) { // if cluster is very flat (no pronounced maximum) then nMax = 0
627 UnfoldCluster(recPoint, nMax, maxAt, maxAtEnergy) ;
628 fRecPoints->Remove(recPoint);
629 fRecPoints->Compress() ;
631 fNumberOfECAClusters-- ;
632 numberofNotUnfolded-- ;
635 recPoint->SetNExMax(1) ; //Only one local maximum
639 delete[] maxAtEnergy ;
642 // End of Unfolding of clusters
645 //____________________________________________________________________________
646 Double_t AliEMCALClusterizerv1::ShowerShape(Double_t x, Double_t y)
648 // Shape of the shower
649 // If you change this function, change also the gradient evaluation in ChiSquare()
651 Double_t r = sqrt(x*x+y*y);
652 Double_t r133 = TMath::Power(r, 1.33) ;
653 Double_t r669 = TMath::Power(r, 6.69) ;
654 Double_t shape = TMath::Exp( -r133 * (1. / (1.57 + 0.0860 * r133) - 0.55 / (1 + 0.000563 * r669) ) ) ;
658 //____________________________________________________________________________
659 void AliEMCALClusterizerv1::UnfoldCluster(AliEMCALRecPoint * iniTower,
661 AliEMCALDigit ** maxAt,
662 Float_t * maxAtEnergy)
664 // Performs the unfolding of a cluster with nMax overlapping showers
665 Int_t nPar = 3 * nMax ;
666 Float_t * fitparameters = new Float_t[nPar] ;
669 AliFatal("Did not get geometry from EMCALLoader") ;
671 Bool_t rv = FindFit(iniTower, maxAt, maxAtEnergy, nPar, fitparameters) ;
673 // Fit failed, return and remove cluster
674 iniTower->SetNExMax(-1) ;
675 delete[] fitparameters ;
679 // create unfolded rec points and fill them with new energy lists
680 // First calculate energy deposited in each sell in accordance with
681 // fit (without fluctuations): efit[]
682 // and later correct this number in acordance with actual energy
685 Int_t nDigits = iniTower->GetMultiplicity() ;
686 Float_t * efit = new Float_t[nDigits] ;
687 Double_t xDigit=0.,yDigit=0.,zDigit=0. ;
688 Float_t xpar=0.,zpar=0.,epar=0. ;
690 AliEMCALDigit * digit = 0 ;
691 Int_t * digitsList = iniTower->GetDigitsList() ;
695 for(iDigit = 0 ; iDigit < nDigits ; iDigit ++){
696 digit = dynamic_cast<AliEMCALDigit*>( fDigitsArr->At(digitsList[iDigit] ) ) ;
697 fGeom->RelPosCellInSModule(digit->GetId(), yDigit, xDigit, zDigit);
701 while(iparam < nPar ){
702 xpar = fitparameters[iparam] ;
703 zpar = fitparameters[iparam+1] ;
704 epar = fitparameters[iparam+2] ;
706 efit[iDigit] += epar * ShowerShape(xDigit - xpar,zDigit - zpar) ;
711 // Now create new RecPoints and fill energy lists with efit corrected to fluctuations
712 // so that energy deposited in each cell is distributed between new clusters proportionally
713 // to its contribution to efit
715 Float_t * energiesList = iniTower->GetEnergiesList() ;
719 while(iparam < nPar ){
720 xpar = fitparameters[iparam] ;
721 zpar = fitparameters[iparam+1] ;
722 epar = fitparameters[iparam+2] ;
725 AliEMCALRecPoint * recPoint = 0 ;
727 if(fNumberOfECAClusters >= fRecPoints->GetSize())
728 fRecPoints->Expand(2*fNumberOfECAClusters) ;
730 (*fRecPoints)[fNumberOfECAClusters] = new AliEMCALRecPoint("") ;
731 recPoint = dynamic_cast<AliEMCALRecPoint *>( fRecPoints->At(fNumberOfECAClusters) ) ;
732 fNumberOfECAClusters++ ;
733 recPoint->SetNExMax((Int_t)nPar/3) ;
736 for(iDigit = 0 ; iDigit < nDigits ; iDigit ++){
737 digit = dynamic_cast<AliEMCALDigit*>( fDigitsArr->At( digitsList[iDigit] ) ) ;
738 fGeom->RelPosCellInSModule(digit->GetId(), yDigit, xDigit, zDigit);
740 ratio = epar * ShowerShape(xDigit - xpar,zDigit - zpar) / efit[iDigit] ;
741 eDigit = energiesList[iDigit] * ratio ;
742 recPoint->AddDigit( *digit, eDigit, kFALSE ) ; //FIXME, need to study the shared case
746 delete[] fitparameters ;
751 //_____________________________________________________________________________
752 void AliEMCALClusterizerv1::UnfoldingChiSquare(Int_t & nPar, Double_t * Grad,
754 Double_t * x, Int_t iflag)
756 // Calculates the Chi square for the cluster unfolding minimization
757 // Number of parameters, Gradient, Chi squared, parameters, what to do
759 TList * toMinuit = dynamic_cast<TList*>( gMinuit->GetObjectFit() ) ;
761 AliEMCALRecPoint * recPoint = dynamic_cast<AliEMCALRecPoint*>( toMinuit->At(0) ) ;
762 TClonesArray * digits = dynamic_cast<TClonesArray*>( toMinuit->At(1) ) ;
763 // A bit buggy way to get an access to the geometry
765 AliEMCALGeometry *geom = dynamic_cast<AliEMCALGeometry *>(toMinuit->At(2));
767 Int_t * digitsList = recPoint->GetDigitsList() ;
769 Int_t nOdigits = recPoint->GetDigitsMultiplicity() ;
771 Float_t * energiesList = recPoint->GetEnergiesList() ;
777 for(iparam = 0 ; iparam < nPar ; iparam++)
778 Grad[iparam] = 0 ; // Will evaluate gradient
782 AliEMCALDigit * digit ;
785 for( iDigit = 0 ; iDigit < nOdigits ; iDigit++) {
787 digit = dynamic_cast<AliEMCALDigit*>( digits->At( digitsList[iDigit] ) );
791 Double_t yDigit=0 ;//not used yet, assumed to be 0
793 geom->RelPosCellInSModule(digit->GetId(), yDigit, xDigit, zDigit);
795 if(iflag == 2){ // calculate gradient
798 while(iParam < nPar ){
799 Double_t dx = (xDigit - x[iParam]) ;
801 Double_t dz = (zDigit - x[iParam]) ;
803 efit += x[iParam] * ShowerShape(dx,dz) ;
806 Double_t sum = 2. * (efit - energiesList[iDigit]) / energiesList[iDigit] ; // Here we assume, that sigma = sqrt(E)
808 while(iParam < nPar ){
809 Double_t xpar = x[iParam] ;
810 Double_t zpar = x[iParam+1] ;
811 Double_t epar = x[iParam+2] ;
812 Double_t dr = TMath::Sqrt( (xDigit - xpar) * (xDigit - xpar) + (zDigit - zpar) * (zDigit - zpar) );
813 Double_t shape = sum * ShowerShape(xDigit - xpar,zDigit - zpar) ;
814 Double_t r133 = TMath::Power(dr, 1.33);
815 Double_t r669 = TMath::Power(dr,6.69);
816 Double_t deriv =-1.33 * TMath::Power(dr,0.33)*dr * ( 1.57 / ( (1.57 + 0.0860 * r133) * (1.57 + 0.0860 * r133) )
817 - 0.55 / (1 + 0.000563 * r669) / ( (1 + 0.000563 * r669) * (1 + 0.000563 * r669) ) ) ;
819 Grad[iParam] += epar * shape * deriv * (xpar - xDigit) ; // Derivative over x
821 Grad[iParam] += epar * shape * deriv * (zpar - zDigit) ; // Derivative over z
823 Grad[iParam] += shape ; // Derivative over energy
831 while(iparam < nPar ){
832 Double_t xpar = x[iparam] ;
833 Double_t zpar = x[iparam+1] ;
834 Double_t epar = x[iparam+2] ;
836 efit += epar * ShowerShape(xDigit - xpar,zDigit - zpar) ;
839 fret += (efit-energiesList[iDigit])*(efit-energiesList[iDigit])/energiesList[iDigit] ;
840 // Here we assume, that sigma = sqrt(E)
843 //____________________________________________________________________________
844 void AliEMCALClusterizerv1::Print(Option_t * /*option*/)const
846 // Print clusterizer parameters
848 TString message("\n") ;
850 if( strcmp(GetName(), "") !=0 ){
854 TString taskName(Version()) ;
856 printf("--------------- ");
857 printf("%s",taskName.Data()) ;
859 printf("Clusterizing digits: ");
860 printf("\n ECA Local Maximum cut = %f", fECALocMaxCut);
861 printf("\n ECA Logarithmic weight = %f", fECAW0);
863 printf("\nUnfolding on\n");
865 printf("\nUnfolding off\n");
867 printf("------------------------------------------------------------------");
870 printf("AliEMCALClusterizerv1 not initialized ") ;
873 //____________________________________________________________________________
874 void AliEMCALClusterizerv1::PrintRecPoints(Option_t * option)
876 // Prints list of RecPoints produced at the current pass of AliEMCALClusterizer
877 if(strstr(option,"deb")) {
878 printf("PrintRecPoints: Clusterization result:") ;
880 printf(" Found %d ECA Rec Points\n ",
881 fRecPoints->GetEntriesFast()) ;
884 if(strstr(option,"all")) {
885 if(strstr(option,"deb")) {
886 printf("\n-----------------------------------------------------------------------\n") ;
887 printf("Clusters in ECAL section\n") ;
888 printf("Index Ene(GeV) Multi Module GX GY GZ lX lY lZ Dispersion Lambda 1 Lambda 2 # of prim Primaries list\n") ;
892 for (index = 0 ; index < fRecPoints->GetEntries() ; index++) {
893 AliEMCALRecPoint * rp = dynamic_cast<AliEMCALRecPoint * >(fRecPoints->At(index)) ;
895 //rp->GetGlobalPosition(globalpos);
897 rp->GetLocalPosition(localpos);
899 rp->GetElipsAxis(lambda);
902 primaries = rp->GetPrimaries(nprimaries);
903 if(strstr(option,"deb"))
904 printf("\n%6d %8.4f %3d %4.1f %4.1f %4.1f %4.1f %4.1f %4.1f %4.1f %4f %4f %2d : ",
905 rp->GetIndexInList(), rp->GetEnergy(), rp->GetMultiplicity(),
906 globalpos.X(), globalpos.Y(), globalpos.Z(), localpos.X(), localpos.Y(), localpos.Z(),
907 rp->GetDispersion(), lambda[0], lambda[1], nprimaries) ;
908 if(strstr(option,"deb")){
909 for (Int_t iprimary=0; iprimary<nprimaries; iprimary++) {
910 printf("%d ", primaries[iprimary] ) ;
915 if(strstr(option,"deb"))
916 printf("\n-----------------------------------------------------------------------\n");
920 //___________________________________________________________________
921 void AliEMCALClusterizerv1::PrintRecoInfo()
923 printf(" AliEMCALClusterizerv1::PrintRecoInfo() : version %s \n", Version() );