1 /**************************************************************************
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4 * Author: The ALICE Off-line Project. *
5 * Contributors are mentioned in the code where appropriate. *
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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 //////////////////////////////////////////////////////////////////////////////
22 // Clusterization class. Performs clusterization (collects neighbouring active cells) and
23 // unfolds the clusters having several local maxima.
24 // Results are stored in TreeR#, branches EMCALTowerRP (EMC recPoints),
25 // EMCALPreShoRP (CPV RecPoints) and AliEMCALClusterizer (Clusterizer with all
26 // parameters including input digits branch title, thresholds etc.)
27 // This TTask is normally called from Reconstructioner, but can as well be used in
30 // root [0] AliEMCALClusterizerv1 * cl = new AliEMCALClusterizerv1("galice.root")
31 // Warning in <TDatabasePDG::TDatabasePDG>: object already instantiated
32 // //reads gAlice from header file "..."
33 // root [1] cl->ExecuteTask()
34 // //finds RecPoints in all events stored in galice.root
35 // root [2] cl->SetDigitsBranch("digits2")
36 // //sets another title for Digitis (input) branch
37 // root [3] cl->SetRecPointsBranch("recp2")
38 // //sets another title four output branches
39 // root [4] cl->SetTowerLocalMaxCut(0.03)
40 // //set clusterization parameters
41 // root [5] cl->ExecuteTask("deb all time")
42 // //once more finds RecPoints options are
43 // // deb - print number of found rec points
44 // // deb all - print number of found RecPoints and some their characteristics
45 // // time - print benchmarking results
47 // --- ROOT system ---
56 #include "TBenchmark.h"
58 // --- Standard library ---
61 // --- AliRoot header files ---
62 #include "AliEMCALGetter.h"
63 #include "AliEMCALClusterizerv1.h"
64 #include "AliEMCALRecPoint.h"
65 #include "AliEMCALDigit.h"
66 #include "AliEMCALDigitizer.h"
68 #include "AliEMCALGeometry.h"
70 ClassImp(AliEMCALClusterizerv1)
72 //____________________________________________________________________________
73 AliEMCALClusterizerv1::AliEMCALClusterizerv1() : AliEMCALClusterizer()
75 // default ctor (to be used mainly by Streamer)
78 fDefaultInit = kTRUE ;
81 //____________________________________________________________________________
82 AliEMCALClusterizerv1::AliEMCALClusterizerv1(const TString alirunFileName, const TString eventFolderName)
83 :AliEMCALClusterizer(alirunFileName, eventFolderName)
85 // ctor with the indication of the file where header Tree and digits Tree are stored
89 fDefaultInit = kFALSE ;
93 //____________________________________________________________________________
94 AliEMCALClusterizerv1::~AliEMCALClusterizerv1()
100 //____________________________________________________________________________
101 const TString AliEMCALClusterizerv1::BranchName() const
107 //____________________________________________________________________________
108 Float_t AliEMCALClusterizerv1::Calibrate(Int_t amp) const
110 //To be replased later by the method, reading individual parameters from the database
111 return -fADCpedestalECA + amp * fADCchannelECA ;
114 //____________________________________________________________________________
115 void AliEMCALClusterizerv1::Exec(Option_t * option)
117 // Steering method to perform clusterization for events
118 // in the range from fFirstEvent to fLastEvent.
119 // This range is optionally set by SetEventRange().
120 // if fLastEvent=-1 (by default), then process events until the end.
122 if(strstr(option,"tim"))
123 gBenchmark->Start("EMCALClusterizer");
125 if(strstr(option,"print"))
128 AliEMCALGetter * gime = AliEMCALGetter::Instance(GetTitle()) ;
130 if (fLastEvent == -1)
131 fLastEvent = gime->MaxEvent() - 1;
133 Int_t nEvents = fLastEvent - fFirstEvent + 1;
136 for (ievent = fFirstEvent; ievent <= fLastEvent; ievent++) {
137 gime->Event(ievent,"D") ;
139 GetCalibrationParameters() ;
141 fNumberOfECAClusters = 0;
150 if(strstr(option,"deb"))
151 PrintRecPoints(option) ;
153 //increment the total number of recpoints per run
154 fRecPointsInRun += gime->ECARecPoints()->GetEntriesFast() ;
159 if(strstr(option,"tim")){
160 gBenchmark->Stop("EMCALClusterizer");
161 printf("Exec took %f seconds for Clusterizing %f seconds per event",
162 gBenchmark->GetCpuTime("EMCALClusterizer"), gBenchmark->GetCpuTime("EMCALClusterizer")/nEvents ) ;
166 //____________________________________________________________________________
167 Bool_t AliEMCALClusterizerv1::FindFit(AliEMCALRecPoint * emcRP, AliEMCALDigit ** maxAt, Float_t * maxAtEnergy,
168 Int_t nPar, Float_t * fitparameters) const
170 // Calls TMinuit to fit the energy distribution of a cluster with several maxima
171 // The initial values for fitting procedure are set equal to the positions of local maxima.
172 // Cluster will be fitted as a superposition of nPar/3 electromagnetic showers
174 AliEMCALGetter * gime = AliEMCALGetter::Instance() ;
175 TClonesArray * digits = gime->Digits() ;
177 gMinuit->mncler(); // Reset Minuit's list of paramters
178 gMinuit->SetPrintLevel(-1) ; // No Printout
179 gMinuit->SetFCN(AliEMCALClusterizerv1::UnfoldingChiSquare) ;
180 // To set the address of the minimization function
181 TList * toMinuit = new TList();
182 toMinuit->AddAt(emcRP,0) ;
183 toMinuit->AddAt(digits,1) ;
185 gMinuit->SetObjectFit(toMinuit) ; // To tranfer pointer to UnfoldingChiSquare
187 // filling initial values for fit parameters
188 AliEMCALDigit * digit ;
192 Int_t nDigits = (Int_t) nPar / 3 ;
196 AliEMCALGeometry * geom = gime->EMCALGeometry() ;
198 for(iDigit = 0; iDigit < nDigits; iDigit++){
199 digit = maxAt[iDigit];
204 geom->AbsToRelNumbering(digit->GetId(), relid) ;
205 geom->PosInAlice(relid, x, z) ;
207 Float_t energy = maxAtEnergy[iDigit] ;
209 gMinuit->mnparm(index, "x", x, 0.1, 0, 0, ierflg) ;
212 Error("FindFit", "EMCAL Unfolding Unable to set initial value for fit procedure : x = %f", x ) ;
215 gMinuit->mnparm(index, "z", z, 0.1, 0, 0, ierflg) ;
218 Error("FindFit", "EMCAL Unfolding Unable to set initial value for fit procedure : z = %f", z) ;
221 gMinuit->mnparm(index, "Energy", energy , 0.05*energy, 0., 4.*energy, ierflg) ;
224 Error("FindFit", "EMCAL Unfolding Unable to set initial value for fit procedure : energy = %f", energy) ;
229 Double_t p0 = 0.1 ; // "Tolerance" Evaluation stops when EDM = 0.0001*p0 ; The number of function call slightly
234 gMinuit->mnexcm("SET STR", &p2, 0, ierflg) ; // force TMinuit to reduce function calls
235 gMinuit->mnexcm("SET GRA", &p1, 1, ierflg) ; // force TMinuit to use my gradient
236 gMinuit->SetMaxIterations(5);
237 gMinuit->mnexcm("SET NOW", &p2 , 0, ierflg) ; // No Warnings
239 gMinuit->mnexcm("MIGRAD", &p0, 0, ierflg) ; // minimize
241 if(ierflg == 4){ // Minimum not found
242 Error("FindFit", "EMCAL Unfolding Fit not converged, cluster abandoned " ) ;
245 for(index = 0; index < nPar; index++){
248 gMinuit->GetParameter(index, val, err) ; // Returns value and error of parameter index
249 fitparameters[index] = val ;
257 //____________________________________________________________________________
258 void AliEMCALClusterizerv1::GetCalibrationParameters()
260 // Gets the parameters for the calibration from the digitizer
261 AliEMCALGetter * gime = AliEMCALGetter::Instance() ;
263 if ( !gime->Digitizer() )
264 gime->LoadDigitizer();
265 AliEMCALDigitizer * dig = gime->Digitizer();
267 fADCchannelECA = dig->GetECAchannel() ;
268 fADCpedestalECA = dig->GetECApedestal();
271 //____________________________________________________________________________
272 void AliEMCALClusterizerv1::Init()
274 // Make all memory allocations which can not be done in default constructor.
275 // Attach the Clusterizer task to the list of EMCAL tasks
277 AliEMCALGetter * gime = AliEMCALGetter::Instance(GetTitle(), fEventFolderName.Data());
279 AliEMCALGeometry * geom = gime->EMCALGeometry() ;
281 fNTowers = geom->GetNZ() * geom->GetNPhi() ;
283 gMinuit = new TMinuit(100) ;
285 if ( !gime->Clusterizer() )
286 gime->PostClusterizer(this);
289 //____________________________________________________________________________
290 void AliEMCALClusterizerv1::InitParameters()
292 // Initializes the parameters for the Clusterizer
293 fNumberOfECAClusters = 0;
294 fECAClusteringThreshold = 0.0135; // must be adjusted according to the noise leve set by digitizer
295 fECALocMaxCut = 0.03 ;
299 fRecPointsInRun = 0 ;
302 //____________________________________________________________________________
303 Int_t AliEMCALClusterizerv1::AreNeighbours(AliEMCALDigit * d1, AliEMCALDigit * d2)const
305 // Gives the neighbourness of two digits = 0 are not neighbour but continue searching
307 // = 2 are not neighbour but do not continue searching
308 // neighbours are defined as digits having at least a common vertex
309 // The order of d1 and d2 is important: first (d1) should be a digit already in a cluster
310 // which is compared to a digit (d2) not yet in a cluster
312 AliEMCALGeometry * geom = AliEMCALGetter::Instance()->EMCALGeometry() ;
317 geom->AbsToRelNumbering(d1->GetId(), relid1) ;
320 geom->AbsToRelNumbering(d2->GetId(), relid2) ;
323 Int_t rowdiff = TMath::Abs( relid1[0] - relid2[0] ) ;
324 Int_t coldiff = TMath::Abs( relid1[1] - relid2[1] ) ;
326 if (( coldiff <= 1 ) && ( rowdiff <= 1 )){
327 if(TMath::Abs(d1->GetTime() - d2->GetTime() ) < fTimeGate)
331 if((relid2[0] > relid1[0]) && (relid2[1] > relid1[1]+1))
332 rv = 2; // Difference in row numbers is too large to look further
336 printf("AreNeighbours: neighbours=%d, id1=%d, relid1=%d,%d \n id2=%d, relid2=%d,%d ",
337 rv, d1->GetId(), relid1[0], relid1[1],
338 d2->GetId(), relid2[0], relid2[1]) ;
343 //____________________________________________________________________________
344 void AliEMCALClusterizerv1::Unload()
346 // Unloads the Digits and RecPoints
347 AliEMCALGetter * gime = AliEMCALGetter::Instance() ;
348 gime->EmcalLoader()->UnloadDigits() ;
349 gime->EmcalLoader()->UnloadRecPoints() ;
352 //____________________________________________________________________________
353 void AliEMCALClusterizerv1::WriteRecPoints()
356 // Creates new branches with given title
357 // fills and writes into TreeR.
359 AliEMCALGetter *gime = AliEMCALGetter::Instance() ;
361 TObjArray * aECARecPoints = gime->ECARecPoints() ;
363 TClonesArray * digits = gime->Digits() ;
364 TTree * treeR = gime->TreeR(); ;
368 //Evaluate position, dispersion and other RecPoint properties for EC section
369 for(index = 0; index < aECARecPoints->GetEntries(); index++)
370 (dynamic_cast<AliEMCALRecPoint *>(aECARecPoints->At(index)))->EvalAll(fECAW0,digits) ;
372 aECARecPoints->Sort() ;
374 for(index = 0; index < aECARecPoints->GetEntries(); index++)
375 (dynamic_cast<AliEMCALRecPoint *>(aECARecPoints->At(index)))->SetIndexInList(index) ;
377 aECARecPoints->Expand(aECARecPoints->GetEntriesFast()) ;
379 Int_t bufferSize = 32000 ;
380 Int_t splitlevel = 0 ;
383 TBranch * branchECA = treeR->Branch("EMCALECARP","TObjArray",&aECARecPoints,bufferSize,splitlevel);
384 branchECA->SetTitle(BranchName());
388 gime->WriteRecPoints("OVERWRITE");
389 gime->WriteClusterizer("OVERWRITE");
392 //____________________________________________________________________________
393 void AliEMCALClusterizerv1::MakeClusters()
395 // Steering method to construct the clusters stored in a list of Reconstructed Points
396 // A cluster is defined as a list of neighbour digits
398 AliEMCALGetter * gime = AliEMCALGetter::Instance() ;
400 AliEMCALGeometry * geom = gime->EMCALGeometry() ;
402 TObjArray * aECARecPoints = gime->ECARecPoints() ;
404 aECARecPoints->Delete() ;
406 TClonesArray * digits = gime->Digits() ;
409 AliEMCALDigit * digit ;
412 // count the number of digits in ECA section
413 while ( (digit = dynamic_cast<AliEMCALDigit *>(next())) ) { // scan over the list of digits
414 if (geom->IsInECA(digit->GetId()))
417 Error("MakeClusters", "id = %d is a wrong ID!", digit->GetId()) ;
421 TClonesArray * digitsC = dynamic_cast<TClonesArray*>(digits->Clone()) ;
422 // Clusterization starts
424 TIter nextdigit(digitsC) ;
426 while ( (digit = dynamic_cast<AliEMCALDigit *>(nextdigit())) ) { // scan over the list of digitsC
427 AliEMCALRecPoint * clu = 0 ;
429 TArrayI clusterECAdigitslist(50);
431 Bool_t inECA = kFALSE;
432 if( geom->IsInECA(digit->GetId()) ) {
437 printf("MakeClusters: id = %d, ene = %f , thre = %f",
438 digit->GetId(),Calibrate(digit->GetAmp()), fECAClusteringThreshold) ;
440 if (inECA && (Calibrate(digit->GetAmp()) > fECAClusteringThreshold ) ){
442 Int_t iDigitInECACluster = 0;
444 if( geom->IsInECA(digit->GetId()) ) {
445 // start a new Tower RecPoint
446 if(fNumberOfECAClusters >= aECARecPoints->GetSize())
447 aECARecPoints->Expand(2*fNumberOfECAClusters+1) ;
448 AliEMCALRecPoint * rp = new AliEMCALRecPoint("") ;
449 aECARecPoints->AddAt(rp, fNumberOfECAClusters) ;
450 clu = dynamic_cast<AliEMCALRecPoint *>(aECARecPoints->At(fNumberOfECAClusters)) ;
451 fNumberOfECAClusters++ ;
452 clu->AddDigit(*digit, Calibrate(digit->GetAmp())) ;
453 clusterECAdigitslist[iDigitInECACluster] = digit->GetIndexInList() ;
454 iDigitInECACluster++ ;
455 digitsC->Remove(digit) ;
457 printf("MakeClusters: OK id = %d, ene = %f , thre = %f ", digit->GetId(),Calibrate(digit->GetAmp()), fECAClusteringThreshold) ;
462 AliEMCALDigit * digitN ;
467 while (index < iDigitInECACluster){ // scan over digits already in cluster
468 digit = (AliEMCALDigit*)digits->At(clusterECAdigitslist[index]) ;
470 while ( (digitN = (AliEMCALDigit *)nextdigit()) ) { // scan over the reduced list of digits
471 Int_t ineb = AreNeighbours(digit, digitN); // call (digit,digitN) in THAT oder !!!!!
473 case 0 : // not a neighbour
475 case 1 : // are neighbours
476 clu->AddDigit(*digitN, Calibrate( digitN->GetAmp()) ) ;
477 clusterECAdigitslist[iDigitInECACluster] = digitN->GetIndexInList() ;
478 iDigitInECACluster++ ;
479 digitsC->Remove(digitN) ;
481 case 2 : // too far from each other
489 } // loop over ECA cluster
495 //____________________________________________________________________________
496 void AliEMCALClusterizerv1::MakeUnfolding() const
498 Fatal("AliEMCALClusterizerv1::MakeUnfolding", "--> Unfolding not implemented") ;
502 //____________________________________________________________________________
503 Double_t AliEMCALClusterizerv1::ShowerShape(Double_t r)
505 // Shape of the shower (see EMCAL TDR)
506 // If you change this function, change also the gradient evaluation in ChiSquare()
508 Double_t r4 = r*r*r*r ;
509 Double_t r295 = TMath::Power(r, 2.95) ;
510 Double_t shape = TMath::Exp( -r4 * (1. / (2.32 + 0.26 * r4) + 0.0316 / (1 + 0.0652 * r295) ) ) ;
514 //____________________________________________________________________________
515 void AliEMCALClusterizerv1::UnfoldCluster(AliEMCALRecPoint * /*iniTower*/,
517 AliEMCALDigit ** /*maxAt*/,
518 Float_t * /*maxAtEnergy*/) const
520 // Performs the unfolding of a cluster with nMax overlapping showers
522 Fatal("UnfoldCluster", "--> Unfolding not implemented") ;
526 //_____________________________________________________________________________
527 void AliEMCALClusterizerv1::UnfoldingChiSquare(Int_t & /*nPar*/, Double_t * /*Grad*/,
529 Double_t * /*x*/, Int_t /*iflag*/)
531 // Calculates the Chi square for the cluster unfolding minimization
532 // Number of parameters, Gradient, Chi squared, parameters, what to do
534 ::Fatal("UnfoldingChiSquare","Unfolding not implemented") ;
536 //____________________________________________________________________________
537 void AliEMCALClusterizerv1::Print(Option_t * /*option*/)const
539 // Print clusterizer parameters
541 TString message("\n") ;
543 if( strcmp(GetName(), "") !=0 ){
547 TString taskName(GetName()) ;
548 taskName.ReplaceAll(Version(), "") ;
550 printf("--------------- ");
551 printf(taskName.Data()) ;
554 printf("-----------\n");
555 printf("Clusterizing digits from the file: ");
556 printf(taskName.Data());
557 printf("\n Branch: ");
559 printf("\n ECA Local Maximum cut = %f", fECALocMaxCut);
560 printf("\n ECA Logarithmic weight = %f", fECAW0);
562 printf("\nUnfolding on\n");
564 printf("\nUnfolding off\n");
566 printf("------------------------------------------------------------------");
569 printf("AliEMCALClusterizerv1 not initialized ") ;
572 //____________________________________________________________________________
573 void AliEMCALClusterizerv1::PrintRecPoints(Option_t * option)
575 // Prints list of RecPoints produced at the current pass of AliEMCALClusterizer
577 TObjArray * aECARecPoints = AliEMCALGetter::Instance()->ECARecPoints() ;
578 printf("PrintRecPoints: Clusterization result:") ;
580 printf("event # %d\n", gAlice->GetEvNumber() ) ;
581 printf(" Found %d ECA Rec Points\n ",
582 aECARecPoints->GetEntriesFast()) ;
584 fRecPointsInRun += aECARecPoints->GetEntriesFast() ;
586 if(strstr(option,"all")) {
588 printf("\n-----------------------------------------------------------------------\n") ;
589 printf("Clusters in ECAL section\n") ;
590 printf("Index Ene(GeV) Multi Module phi r theta X Y Z Dispersion Lambda 1 Lambda 2 # of prim Primaries list\n") ;
592 for (index = 0 ; index < aECARecPoints->GetEntries() ; index++) {
593 AliEMCALRecPoint * rp = dynamic_cast<AliEMCALRecPoint * >(aECARecPoints->At(index)) ;
595 rp->GetGlobalPosition(globalpos);
597 rp->GetLocalPosition(localpos);
599 rp->GetElipsAxis(lambda);
602 primaries = rp->GetPrimaries(nprimaries);
603 printf("\n%6d %8.4f %3d %4.1f %4.1f %4.1f %4.1f %4.1f %4.1f %4.1f %4f %4f %2d : ",
604 rp->GetIndexInList(), rp->GetEnergy(), rp->GetMultiplicity(),
605 globalpos.X(), globalpos.Y(), globalpos.Z(), localpos.X(), localpos.Y(), localpos.Z(),
606 rp->GetDispersion(), lambda[0], lambda[1], nprimaries) ;
607 for (Int_t iprimary=0; iprimary<nprimaries; iprimary++) {
608 printf("%d ", primaries[iprimary] ) ;
611 printf("\n-----------------------------------------------------------------------\n");