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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 *
9 * without fee, provided that the above copyright notice appears in all *
10 * copies and that both the copyright notice and this permission notice *
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12 * about the suitability of this software for any purpose. It is *
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14 **************************************************************************/
19 1 October 2000. Yuri Kharlov:
21 PPSD upper layer is considered if number of layers>1
23 18 October 2000. Yuri Kharlov:
24 AliPHOSClusterizerv1()
25 CPV clusterizing parameters added
28 After first PPSD digit remove EMC digits only once
31 //_________________________________________________________________________
32 // Implementation version 1 of the clusterization algorithm
34 //*-- Author: Yves Schutz (SUBATECH)
35 //////////////////////////////////////////////////////////////////////////////
39 // --- ROOT system ---
43 // --- Standard library ---
47 // --- AliRoot header files ---
49 #include "AliPHOSClusterizerv1.h"
50 #include "AliPHOSDigit.h"
51 #include "AliPHOSEmcRecPoint.h"
52 #include "AliPHOSPpsdRecPoint.h"
53 #include "AliPHOSCpvRecPoint.h"
54 #include "AliPHOSv0.h"
57 ClassImp(AliPHOSClusterizerv1)
59 //____________________________________________________________________________
60 AliPHOSClusterizerv1::AliPHOSClusterizerv1()
62 // default ctor (to be used)
66 fGeom = AliPHOSGeometry::GetInstance();
67 fNumberOfEmcClusters = 0 ;
68 fNumberOfPpsdClusters = 0 ;
69 fEmcClusteringThreshold = 0.2;
70 fEmcEnergyThreshold = 0.05;
71 fPpsdClusteringThreshold = 0.0000002 ;
72 fPpsdEnergyThreshold = 0.0000002 ;
73 fCpvClusteringThreshold = 0.0;
74 fCpvEnergyThreshold = 0.09;
78 fLocMaxCutCPV = 0.03 ;
82 //____________________________________________________________________________
83 Int_t AliPHOSClusterizerv1::AreNeighbours(AliPHOSDigit * d1, AliPHOSDigit * d2)
85 // Gives the neighbourness of two digits = 0 are not neighbour but continue searching
87 // = 2 are not neighbour but do not continue searching
88 // neighbours are defined as digits having at least common vertex
89 // The order of d1 and d2 is important: first (d1) should be a digit already in a cluster
90 // which is compared to a digit (d2) not yet in a cluster
95 fGeom->AbsToRelNumbering(d1->GetId(), relid1) ;
98 fGeom->AbsToRelNumbering(d2->GetId(), relid2) ;
100 if ( (relid1[0] == relid2[0]) && (relid1[1]==relid2[1]) ) { // inside the same PHOS module and the same PPSD Module
101 Int_t rowdiff = TMath::Abs( relid1[2] - relid2[2] ) ;
102 Int_t coldiff = TMath::Abs( relid1[3] - relid2[3] ) ;
104 if (( coldiff <= 1 ) && ( rowdiff <= 1 )){
108 if((relid2[2] > relid1[2]) && (relid2[3] > relid1[3]+1))
109 rv = 2; // Difference in row numbers is too large to look further
115 if( (relid1[0] < relid2[0]) || (relid1[1] < relid2[1]) )
120 //Do NOT clusterize upper PPSD
121 if( IsInPpsd(d1) && IsInPpsd(d2) &&
123 relid1[1] < fGeom->GetNumberOfPadsPhi()*fGeom->GetNumberOfPadsPhi() ) rv = 2 ;
128 //____________________________________________________________________________
129 void AliPHOSClusterizerv1::FillandSort(const DigitsList * dl, TObjArray * tl)
131 // Copies the digits with energy above thershold and sorts the list
132 // according to increasing Id number
135 AliPHOSDigit * digit ;
137 while ( (digit = (AliPHOSDigit *)next()) ) {
138 Float_t ene = Calibrate(digit->GetAmp()) ;
139 if ( IsInEmc (digit) && ene > fEmcEnergyThreshold )
141 else if ( IsInPpsd (digit) && ene > fPpsdEnergyThreshold )
143 else if ( IsInCpv (digit) && ene > fCpvEnergyThreshold )
149 //____________________________________________________________________________
150 void AliPHOSClusterizerv1:: GetNumberOfClustersFound(Int_t * numb)
152 // Fills numb with the number of EMC (numb[0]) clusters found
153 // PPSD (numb[1]) clusters found
155 numb[0] = fNumberOfEmcClusters ;
156 numb[1] = fNumberOfPpsdClusters ;
159 //____________________________________________________________________________
160 Bool_t AliPHOSClusterizerv1::IsInEmc(AliPHOSDigit * digit)
162 // Tells if (true) or not (false) the digit is in a PHOS-EMC module
167 fGeom->AbsToRelNumbering(digit->GetId(), relid) ;
169 if ( relid[1] == 0 ) rv = kTRUE;
174 //____________________________________________________________________________
175 Bool_t AliPHOSClusterizerv1::IsInPpsd(AliPHOSDigit * digit)
177 // Tells if (true) or not (false) the digit is in a PHOS-PPSD module
182 fGeom->AbsToRelNumbering(digit->GetId(), relid) ;
184 if ( relid[1] > 0 && relid[0] > fGeom->GetNCPVModules() ) rv = kTRUE;
189 //____________________________________________________________________________
190 Bool_t AliPHOSClusterizerv1::IsInCpv(AliPHOSDigit * digit)
192 // Tells if (true) or not (false) the digit is in a PHOS-CPV module
197 fGeom->AbsToRelNumbering(digit->GetId(), relid) ;
199 if ( relid[1] > 0 && relid[0] <= fGeom->GetNCPVModules() ) rv = kTRUE;
204 //____________________________________________________________________________
205 void AliPHOSClusterizerv1::MakeClusters(const DigitsList * dl,
206 AliPHOSRecPoint::RecPointsList * emcl,
207 AliPHOSRecPoint::RecPointsList * ppsdl)
209 // Steering method to construct the clusters stored in a list of Reconstructed Points
210 // A cluster is defined as a list of neighbour digits
212 fNumberOfEmcClusters = 0 ;
213 fNumberOfPpsdClusters = 0 ;
214 fNumberOfCpvClusters = 0 ;
216 // Fill and sort the working digits list
217 TObjArray tempodigitslist( dl->GetEntries() ) ;
218 FillandSort(dl, &tempodigitslist) ;
220 // Clusterization starts
221 TIter nextdigit(&tempodigitslist) ;
222 AliPHOSDigit * digit ;
223 Bool_t notremoved = kTRUE ;
225 while ( (digit = (AliPHOSDigit *)nextdigit()) ) { // scan over the list of digits
226 AliPHOSRecPoint * clu ;
228 AliPHOSDigit ** clusterdigitslist = new AliPHOSDigit*[dl->GetEntries()] ;
231 if (( IsInEmc (digit) && Calibrate(digit->GetAmp()) > fEmcClusteringThreshold ) ||
232 ( IsInPpsd(digit) && Calibrate(digit->GetAmp()) > fPpsdClusteringThreshold ) ||
233 ( IsInCpv (digit) && Calibrate(digit->GetAmp()) > fCpvClusteringThreshold ) ) {
235 Int_t iDigitInCluster = 0 ;
237 if ( IsInEmc(digit) ) {
238 // start a new EMC RecPoint
239 if(fNumberOfEmcClusters >= emcl->GetSize()) emcl->Expand(2*fNumberOfEmcClusters+1) ;
240 (*emcl)[fNumberOfEmcClusters] = new AliPHOSEmcRecPoint(fW0, fLocMaxCut) ;
241 clu = (AliPHOSEmcRecPoint *) emcl->At(fNumberOfEmcClusters) ;
242 fNumberOfEmcClusters++ ;
243 clu->AddDigit(*digit, Calibrate(digit->GetAmp())) ;
244 clusterdigitslist[iDigitInCluster] = digit ;
246 tempodigitslist.Remove(digit) ;
250 // start a new PPSD/CPV cluster
251 if(fNumberOfPpsdClusters >= ppsdl->GetSize()) ppsdl->Expand(2*fNumberOfPpsdClusters+1);
253 (*ppsdl)[fNumberOfPpsdClusters] = new AliPHOSPpsdRecPoint() ;
255 (*ppsdl)[fNumberOfPpsdClusters] = new AliPHOSCpvRecPoint(fW0CPV, fLocMaxCutCPV) ;
256 clu = (AliPHOSPpsdRecPoint *) ppsdl->At(fNumberOfPpsdClusters) ;
257 fNumberOfPpsdClusters++ ;
259 clu->AddDigit(*digit, Calibrate(digit->GetAmp()) ) ;
260 clusterdigitslist[iDigitInCluster] = digit ;
262 tempodigitslist.Remove(digit) ;
265 // Here we remove resting EMC digits, which cannot make cluster
268 while( ( digit = (AliPHOSDigit *)nextdigit() ) ) {
270 tempodigitslist.Remove(digit) ;
274 notremoved = kFALSE ;
281 AliPHOSDigit * digitN ;
283 while (index < iDigitInCluster){ // scan over digits already in cluster
284 digit = clusterdigitslist[index] ;
286 while ( (digitN = (AliPHOSDigit *)nextdigit()) ) { // scan over the reduced list of digits
287 Int_t ineb = AreNeighbours(digit, digitN); // call (digit,digitN) in THAT oder !!!!!
289 case 0 : // not a neighbour
291 case 1 : // are neighbours
292 clu->AddDigit(*digitN, Calibrate( digitN->GetAmp() ) ) ;
293 clusterdigitslist[iDigitInCluster] = digitN ;
295 tempodigitslist.Remove(digitN) ;
297 case 2 : // too far from each other
306 } // loop over cluster
307 } //below energy theshold
309 delete[] clusterdigitslist ;
313 tempodigitslist.Clear() ;
317 for(index = 0; index < ppsdl->GetEntries(); index++)
318 ((AliPHOSPpsdRecPoint *)ppsdl->At(index))->SetIndexInList(index) ;
321 //____________________________________________________________________________
322 void AliPHOSClusterizerv1::PrintParameters()
324 // Print the energy thresholds
326 cout << "PHOS Clusterizer version 1 :" << endl
327 << " EMC Clustering threshold = " << fEmcClusteringThreshold << endl
328 << " EMC Energy threshold = " << fEmcEnergyThreshold << endl
329 << " PPSD Clustering threshold = " << fPpsdClusteringThreshold << endl
330 << " PPSD Energy threshold = " << fPpsdEnergyThreshold << endl
331 << " CPV Clustering threshold = " << fCpvClusteringThreshold << endl
332 << " CPV Energy threshold = " << fCpvEnergyThreshold << endl ;