1 /**************************************************************************
2 * Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved. *
4 * Author: The ALICE Off-line Project. *
5 * Contributors are mentioned in the code where appropriate. *
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8 * documentation strictly for non-commercial purposes is hereby granted *
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12 * about the suitability of this software for any purpose. It is *
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14 **************************************************************************/
16 // This class derives from AliEMCALClustrerizer but also keeps the API of AliEMCALClusterizerv1
18 // 1. peek the most energetic cell
19 // 2. assign it as a center of the cluster and add cells surrounding it: 3x3, 5x5...
20 // 3. remove the cells contributing to the cluster
21 // 4. start from 1 for the remaining clusters
22 // 5. cluster splitting (not implemented yet) - use the shape analysis to resolve the energy sharing
23 // - for high energy clusters check the surrounding of the 3x3 clusters for extra energy
24 // (merge 3x3 clusters and resolve the internal energy sharing - case for 2 clusters merged)
26 // root [0] AliEMCALClusterizerNxN * cl = new AliEMCALClusterizerNxN("galice.root")
27 // Warning in <TDatabasePDG::TDatabasePDG>: object already instantiated
28 // //reads gAlice from header file "..."
29 // root [1] cl->ExecuteTask()
30 // //finds RecPoints in all events stored in galice.root
31 // root [2] cl->SetDigitsBranch("digits2")
32 // //sets another title for Digitis (input) branch
33 // root [3] cl->SetRecPointsBranch("recp2")
34 // //sets another title four output branches
35 // root [4] cl->SetTowerLocalMaxCut(0.03)
36 // //set clusterization parameters
37 // root [5] cl->ExecuteTask("deb all time")
38 // //once more finds RecPoints options are
39 // // deb - print number of found rec points
40 // // deb all - print number of found RecPoints and some their characteristics
41 // // time - print benchmarking results
43 // --- ROOT system ---
47 #include <TBenchmark.h>
50 #include <TClonesArray.h>
52 // --- Standard library ---
55 // --- AliRoot header files ---
57 #include "AliEMCALClusterizerNxN.h"
58 #include "AliEMCALRecPoint.h"
59 #include "AliEMCALDigit.h"
60 #include "AliEMCALGeometry.h"
61 #include "AliCaloCalibPedestal.h"
62 #include "AliEMCALCalibData.h"
63 #include "AliESDCaloCluster.h"
65 ClassImp(AliEMCALClusterizerNxN)
67 Bool_t AliEMCALClusterizerNxN::fgkIsInputCalibrated = kFALSE;
69 //____________________________________________________________________________
70 AliEMCALClusterizerNxN::AliEMCALClusterizerNxN()
71 : AliEMCALClusterizer()
73 // ctor with the indication of the file where header Tree and digits Tree are stored
76 //____________________________________________________________________________
77 AliEMCALClusterizerNxN::AliEMCALClusterizerNxN(AliEMCALGeometry* geometry)
78 : AliEMCALClusterizer(geometry)
80 // ctor with the indication of the file where header Tree and digits Tree are stored
81 // use this contructor to avoid usage of Init() which uses runloader
82 // change needed by HLT - MP
86 //____________________________________________________________________________
87 AliEMCALClusterizerNxN::AliEMCALClusterizerNxN(AliEMCALGeometry* geometry, AliEMCALCalibData * calib, AliCaloCalibPedestal * caloped)
88 : AliEMCALClusterizer(geometry, calib, caloped)
90 // ctor, geometry and calibration are initialized elsewhere.
95 //____________________________________________________________________________
96 AliEMCALClusterizerNxN::~AliEMCALClusterizerNxN()
102 //____________________________________________________________________________
103 void AliEMCALClusterizerNxN::Digits2Clusters(Option_t * option)
105 // Steering method to perform clusterization for the current event
108 if(strstr(option,"tim"))
109 gBenchmark->Start("EMCALClusterizer");
111 if(strstr(option,"print"))
114 //Get calibration parameters from file or digitizer default values.
115 GetCalibrationParameters() ;
117 //Get dead channel map from file or digitizer default values.
118 GetCaloCalibPedestal() ;
120 fNumberOfECAClusters = 0;
122 MakeClusters() ; //only the real clusters
129 //Evaluate position, dispersion and other RecPoint properties for EC section
130 for(index = 0; index < fRecPoints->GetEntries(); index++)
132 AliEMCALRecPoint * rp = dynamic_cast<AliEMCALRecPoint *>(fRecPoints->At(index));
134 rp->EvalAll(fECAW0,fDigitsArr) ;
135 AliDebug(5, Form("MAX INDEX %d ", rp->GetMaximalEnergyIndex()));
136 //For each rec.point set the distance to the nearest bad crystal
137 rp->EvalDistanceToBadChannels(fCaloPed);
143 for(index = 0; index < fRecPoints->GetEntries(); index++)
145 (dynamic_cast<AliEMCALRecPoint *>(fRecPoints->At(index)))->SetIndexInList(index) ;
146 (dynamic_cast<AliEMCALRecPoint *>(fRecPoints->At(index)))->Print();
151 if(strstr(option,"deb") || strstr(option,"all"))
152 PrintRecPoints(option) ;
154 AliDebug(1,Form("EMCAL Clusterizer found %d Rec Points",fRecPoints->GetEntriesFast()));
156 fRecPoints->Delete();
158 if(strstr(option,"tim")){
159 gBenchmark->Stop("EMCALClusterizer");
160 printf("Exec took %f seconds for Clusterizing",
161 gBenchmark->GetCpuTime("EMCALClusterizer"));
165 //____________________________________________________________________________
166 Int_t AliEMCALClusterizerNxN::AreNeighbours(AliEMCALDigit * d1, AliEMCALDigit * d2, Bool_t & shared) const
168 // Gives the neighbourness of two digits = 0 are not neighbour ; continue searching
170 // = 2 is in different SM; continue searching
171 // In case it is in different SM, but same phi rack, check if neigbours at eta=0
172 // neighbours are defined as digits having at least a common side
173 // The order of d1 and d2 is important: first (d1) should be a digit already in a cluster
174 // which is compared to a digit (d2) not yet in a cluster
176 static Int_t nSupMod1=0, nModule1=0, nIphi1=0, nIeta1=0, iphi1=0, ieta1=0;
177 static Int_t nSupMod2=0, nModule2=0, nIphi2=0, nIeta2=0, iphi2=0, ieta2=0;
178 static Int_t rowdiff=0, coldiff=0;
182 fGeom->GetCellIndex(d1->GetId(), nSupMod1,nModule1,nIphi1,nIeta1);
183 fGeom->GetCellIndex(d2->GetId(), nSupMod2,nModule2,nIphi2,nIeta2);
184 fGeom->GetCellPhiEtaIndexInSModule(nSupMod1,nModule1,nIphi1,nIeta1, iphi1,ieta1);
185 fGeom->GetCellPhiEtaIndexInSModule(nSupMod2,nModule2,nIphi2,nIeta2, iphi2,ieta2);
187 //If different SM, check if they are in the same phi, then consider cells close to eta=0 as neighbours; May 2010
188 if(nSupMod1 != nSupMod2 )
190 //Check if the 2 SM are in the same PHI position (0,1), (2,3), ...
191 Float_t smPhi1 = fGeom->GetEMCGeometry()->GetPhiCenterOfSM(nSupMod1);
192 Float_t smPhi2 = fGeom->GetEMCGeometry()->GetPhiCenterOfSM(nSupMod2);
194 if(!TMath::AreEqualAbs(smPhi1, smPhi2, 1e-3)) return 2; //Not phi rack equal, not neighbours
196 // In case of a shared cluster, index of SM in C side, columns start at 48 and ends at 48*2
197 // C Side impair SM, nSupMod%2=1; A side pair SM nSupMod%2=0
198 if(nSupMod1%2) ieta1+=AliEMCALGeoParams::fgkEMCALCols;
199 else ieta2+=AliEMCALGeoParams::fgkEMCALCols;
201 shared = kTRUE; // maybe a shared cluster, we know this later, set it for the moment.
203 }//Different SM, same phi
205 rowdiff = TMath::Abs(iphi1 - iphi2);
206 coldiff = TMath::Abs(ieta1 - ieta2) ;
208 // neighbours +-1 in col and row
209 if ( TMath::Abs(coldiff) < 2 && TMath::Abs(rowdiff) < 2)
212 AliDebug(9, Form("AliEMCALClusterizerNxN::AreNeighbours(): id1=%d, (row %d, col %d) ; id2=%d, (row %d, col %d), shared %d \n",
213 d1->GetId(), iphi1,ieta1, d2->GetId(), iphi2,ieta2, shared));
219 AliDebug(9, Form("NOT AliEMCALClusterizerNxN::AreNeighbours(): id1=%d, (row %d, col %d) ; id2=%d, (row %d, col %d), shared %d \n",
220 d1->GetId(), iphi1,ieta1, d2->GetId(), iphi2,ieta2, shared));
226 //____________________________________________________________________________
227 void AliEMCALClusterizerNxN::MakeClusters()
229 // Steering method to construct the clusters stored in a list of Reconstructed Points
230 // A cluster is defined as a list of neighbour digits
231 // Mar 03, 2007 by PAI
233 if (fGeom==0) AliFatal("Did not get geometry from EMCALLoader");
237 // Set up TObjArray with pointers to digits to work on
238 //TObjArray *digitsC = new TObjArray();
240 TIter nextdigit(fDigitsArr);
241 AliEMCALDigit *digit = 0;
242 while ( (digit = dynamic_cast<AliEMCALDigit*>(nextdigit())) ) {
243 digitsC.AddLast(digit);
246 TIter nextdigitC(&digitsC);
248 AliDebug(1,Form("MakeClusters: Number of digits %d -> (e %f)\n",
249 fDigitsArr->GetEntries(),fMinECut));
251 Bool_t bDone = kFALSE;
252 while ( bDone != kTRUE )
254 //first sort the digits:
255 Int_t iMaxEnergyDigit = -1;
256 Float_t dMaxEnergyDigit = -1;
257 AliEMCALDigit *pMaxEnergyDigit = 0;
259 while ( (digit = dynamic_cast<AliEMCALDigit *>(nextdigitC())) )
260 { // scan over the list of digitsC
261 Float_t dEnergyCalibrated = Calibrate(digit->GetAmplitude(), digit->GetTime(),digit->GetId());
262 //AliDebug(5, Form("-> Digit ENERGY: %1.5f", dEnergyCalibrated));
264 //if(fGeom->CheckAbsCellId(digit->GetId()) && dEnergyCalibrated > fECAClusteringThreshold )
265 if(fGeom->CheckAbsCellId(digit->GetId()) && dEnergyCalibrated > 0.0) // no threshold!
267 if (dEnergyCalibrated > dMaxEnergyDigit)
269 dMaxEnergyDigit = dEnergyCalibrated;
270 iMaxEnergyDigit = digit->GetId();
271 pMaxEnergyDigit = digit;
276 if (iMaxEnergyDigit < 0 || digitsC.GetEntries() <= 0)
282 AliDebug (2, Form("Max digit found: %1.2f AbsId: %d", dMaxEnergyDigit, iMaxEnergyDigit));
283 AliDebug(5, Form("Max Digit ENERGY: %1.5f", dMaxEnergyDigit));
285 // keep the candidate digits in a list
286 TList clusterDigitList;
287 clusterDigitList.SetOwner(kFALSE);
288 clusterDigitList.AddLast(pMaxEnergyDigit);
290 Double_t clusterCandidateEnergy = dMaxEnergyDigit;
292 // now loop over the resto of the digits and cluster into NxN cluster
293 // we do not actually cluster yet: we keep them in the list clusterDigitList
295 while ( (digit = dynamic_cast<AliEMCALDigit *>(nextdigitC())) )
296 { // scan over the list of digitsC
297 if (digit == pMaxEnergyDigit) continue;
298 Float_t dEnergyCalibrated = Calibrate(digit->GetAmplitude(), digit->GetTime(),digit->GetId());
299 AliDebug(5, Form("-> Digit ENERGY: %1.5f", dEnergyCalibrated));
300 //if(fGeom->CheckAbsCellId(digit->GetId()) && dEnergyCalibrated > fECAClusteringThreshold )
301 if(fGeom->CheckAbsCellId(digit->GetId()) && dEnergyCalibrated > 0.0 )
303 Float_t time = pMaxEnergyDigit->GetTime(); //Time or TimeR?
304 if(TMath::Abs(time - digit->GetTime()) > fTimeCut ) continue; //Time or TimeR?
305 Bool_t shared = kFALSE; //cluster shared by 2 SuperModules?
306 if (AreNeighbours(pMaxEnergyDigit, digit, shared) == 1) // call (digit,digitN) in THAT order !!!!!
308 clusterDigitList.AddLast(digit) ;
309 clusterCandidateEnergy += dEnergyCalibrated;
312 }// loop over the next digits
314 // start a cluster here only if a cluster energy is larger than clustering threshold
315 //if (clusterCandidateEnergy > 0.1)
316 AliDebug(5, Form("Clusterization threshold is %f MeV", fECAClusteringThreshold));
317 if (clusterCandidateEnergy > fECAClusteringThreshold)
319 if(fNumberOfECAClusters >= fRecPoints->GetSize()) fRecPoints->Expand(2*fNumberOfECAClusters+1) ;
321 AliEMCALRecPoint *recPoint = new AliEMCALRecPoint("") ;
322 fRecPoints->AddAt(recPoint, fNumberOfECAClusters) ;
323 recPoint = dynamic_cast<AliEMCALRecPoint *>(fRecPoints->At(fNumberOfECAClusters)) ;
325 fNumberOfECAClusters++ ;
326 recPoint->SetClusterType(AliVCluster::kEMCALClusterv1);
328 AliDebug(9, Form("Number of cells per cluster (max is 9!): %d", clusterDigitList.GetEntries()));
329 for (Int_t idig = 0; idig < clusterDigitList.GetEntries(); idig++)
332 digit = (AliEMCALDigit*)clusterDigitList.At(idig);
333 Float_t dEnergyCalibrated = Calibrate(digit->GetAmplitude(), digit->GetTime(),digit->GetId());
334 AliDebug(5, Form(" Adding digit %d", digit->GetId()));
335 // note: this way the sharing info is lost!
336 recPoint->AddDigit(*digit, dEnergyCalibrated, kFALSE) ; //Time or TimeR?
337 digitsC.Remove(digit);
343 // we do not want to start clustering in the same spot!
344 // but in this case we may NOT reuse this seed for another cluster!
345 // need a better bookeeping?
346 digitsC.Remove(pMaxEnergyDigit);
349 AliDebug (2, Form("Number of digits left: %d", digitsC.GetEntries()));
352 //delete digitsC ; //nope we use an object
354 AliDebug(1,Form("total no of clusters %d from %d digits",fNumberOfECAClusters,fDigitsArr->GetEntriesFast()));
357 //____________________________________________________________________________
358 void AliEMCALClusterizerNxN::MakeUnfolding()
360 // Unfolds clusters using the shape of an ElectroMagnetic shower
361 // Performs unfolding of all clusters
363 if(fNumberOfECAClusters > 0){
365 AliFatal("Did not get geometry from EMCALLoader") ;
366 Int_t nModulesToUnfold = fGeom->GetNCells();
368 Int_t numberofNotUnfolded = fNumberOfECAClusters ;
370 for(index = 0 ; index < numberofNotUnfolded ; index++){
372 AliEMCALRecPoint * recPoint = dynamic_cast<AliEMCALRecPoint *>( fRecPoints->At(index) ) ;
376 recPoint->GetGlobalPosition(gpos);
377 fGeom->GetAbsCellIdFromEtaPhi(gpos.Eta(),gpos.Phi(),absId);
378 if(absId > nModulesToUnfold)
381 Int_t nMultipl = recPoint->GetMultiplicity() ;
382 AliEMCALDigit ** maxAt = new AliEMCALDigit*[nMultipl] ;
383 Float_t * maxAtEnergy = new Float_t[nMultipl] ;
384 Int_t nMax = recPoint->GetNumberOfLocalMax(maxAt, maxAtEnergy,fECALocMaxCut,fDigitsArr) ;
386 if( nMax > 1 ) { // if cluster is very flat (no pronounced maximum) then nMax = 0
387 //UnfoldCluster(recPoint, nMax, maxAt, maxAtEnergy) ;
388 fRecPoints->Remove(recPoint);
389 fRecPoints->Compress() ;
391 fNumberOfECAClusters-- ;
392 numberofNotUnfolded-- ;
395 recPoint->SetNExMax(1) ; //Only one local maximum
399 delete[] maxAtEnergy ;
402 // End of Unfolding of clusters
405 //____________________________________________________________________________
406 Double_t AliEMCALClusterizerNxN::ShowerShape(Double_t x, Double_t y)
408 // Shape of the shower
409 // If you change this function, change also the gradient evaluation in ChiSquare()
411 Double_t r = sqrt(x*x+y*y);
412 Double_t r133 = TMath::Power(r, 1.33) ;
413 Double_t r669 = TMath::Power(r, 6.69) ;
414 Double_t shape = TMath::Exp( -r133 * (1. / (1.57 + 0.0860 * r133) - 0.55 / (1 + 0.000563 * r669) ) ) ;
418 //____________________________________________________________________________
419 void AliEMCALClusterizerNxN::UnfoldCluster(AliEMCALRecPoint * /*iniTower*/,
421 AliEMCALDigit ** /*maxAt*/,
422 Float_t * /*maxAtEnergy*/)
425 // Performs the unfolding of a cluster with nMax overlapping showers
427 AliWarning("Not implemented. To be.");
430 //___________________________________________________________________
431 void AliEMCALClusterizerNxN::SetInputCalibrated(Bool_t val)
434 // input is calibrated - the case when we run already on ESD
436 AliEMCALClusterizerNxN::fgkIsInputCalibrated = val;