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. *
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 **************************************************************************/
16 //_________________________________________________________________________
17 // A brief description of the class
18 //*-- Author : Yves Schutz SUBATECH
19 //////////////////////////////////////////////////////////////////////////////
21 // --- ROOT system ---
25 // --- Standard library ---
29 // --- AliRoot header files ---
31 #include "AliPHOSClusterizerv1.h"
32 #include "AliPHOSDigit.h"
33 #include "AliPHOSEmcRecPoint.h"
34 #include "AliPHOSPpsdRecPoint.h"
35 #include "AliPHOSv0.h"
38 ClassImp(AliPHOSClusterizerv1)
40 //____________________________________________________________________________
41 AliPHOSClusterizerv1::AliPHOSClusterizerv1()
45 fNumberOfEmcClusters = 0 ;
46 fNumberOfPpsdClusters = 0 ;
47 fEmcClusteringThreshold = 0.1;
48 fEmcEnergyThreshold = 0.01;
49 fPpsdClusteringThreshold = 0.00000015;
50 fPpsdEnergyThreshold = 0.0000001;
55 //____________________________________________________________________________
56 Int_t AliPHOSClusterizerv1::AreNeighbours(AliPHOSDigit * d1, AliPHOSDigit * d2)
58 // neigbours are defined as digits having at least common vertex
59 // The order of A and B in AreNeighbours(A,B) is important: first (A) should be digit
60 // in cluster, which compared with digits not clusterized yet
63 AliPHOSGeometry * geom = AliPHOSGeometry::GetInstance() ;
66 geom->AbsToRelNumbering(d1->GetId(), relid1) ;
69 geom->AbsToRelNumbering(d2->GetId(), relid2) ;
71 if ( (relid1[0] == relid2[0]) && (relid1[1]==relid2[1]) ) { // inside the same PHOS module and the same PPSD Module
72 Int_t rowdiff = TMath::Abs( relid1[2] - relid2[2] ) ;
73 Int_t coldiff = TMath::Abs( relid1[3] - relid2[3] ) ;
75 if (( coldiff <= 1 ) && ( rowdiff <= 1 )){
79 if((relid2[2] > relid1[2]) && (relid2[3] > relid1[3]+1))
80 rv = 2; // Difference in row numbers is too large to look further
86 if( (relid1[0] < relid2[0]) || (relid1[1] < relid2[1]) )
94 //____________________________________________________________________________
95 void AliPHOSClusterizerv1::FillandSort(const DigitsList * dl, TObjArray * tl)
97 // copies the digits with energy above thershold and sorts the list
98 // according to increasing Id number
100 AliPHOSGeometry * geom = AliPHOSGeometry::GetInstance() ;
104 AliPHOSDigit * digit ;
106 while ( (digit = (AliPHOSDigit *)next()) ) {
108 Int_t id = digit->GetId() ;
109 Float_t ene = Calibrate(digit->GetAmp()) ;
110 geom->AbsToRelNumbering(id, relid) ;
112 if(relid[1]==0){ // EMC
113 if ( ene > fEmcEnergyThreshold )
118 if ( ene > fPpsdEnergyThreshold )
126 //____________________________________________________________________________
127 void AliPHOSClusterizerv1:: GetNumberOfClustersFound(Int_t * numb)
129 numb[0] = fNumberOfEmcClusters ;
130 numb[1] = fNumberOfPpsdClusters ;
133 //____________________________________________________________________________
134 Bool_t AliPHOSClusterizerv1::IsInEmc(AliPHOSDigit * digit)
138 AliPHOSGeometry * geom = AliPHOSGeometry::GetInstance() ;
141 geom->AbsToRelNumbering(digit->GetId(), relid) ;
149 //____________________________________________________________________________
150 void AliPHOSClusterizerv1::MakeClusters(const DigitsList * dl, RecPointsList * emcl, RecPointsList * ppsdl)
152 // Fill and sort the working digits list
153 TObjArray tempodigitslist( dl->GetEntries() ) ;
154 FillandSort(dl, &tempodigitslist) ;
156 // Clusterization starts
157 TIter nextdigit(&tempodigitslist) ;
158 AliPHOSDigit * digit ;
159 Bool_t notremoved = kTRUE ;
161 while ( (digit = (AliPHOSDigit *)nextdigit()) ) { // scan over the list of digits
162 AliPHOSRecPoint * clu ;
164 int * clusterdigitslist[dl->GetEntries()] ;
166 if (( ( IsInEmc(digit) ) && ( Calibrate(digit->GetAmp() ) > fEmcClusteringThreshold ) ) ||
167 ( ( !IsInEmc(digit) ) && ( Calibrate(digit->GetAmp() ) > fPpsdClusteringThreshold ) ) ) {
169 Int_t iDigitInCluster = 0 ;
171 if ( IsInEmc(digit) ) {
172 new ((*emcl)[fNumberOfEmcClusters]) AliPHOSEmcRecPoint(fW0, fLocMaxCut) ; // start a new EMC RecPoint
173 clu = (AliPHOSEmcRecPoint *) (*emcl)[fNumberOfEmcClusters] ;
174 fNumberOfEmcClusters++ ;
175 clu->AddDigit(*digit, Calibrate(digit->GetAmp())) ;
177 clusterdigitslist[iDigitInCluster] = (int* ) digit ;
179 tempodigitslist.Remove(digit) ;
183 new ((*ppsdl)[fNumberOfPpsdClusters]) AliPHOSPpsdRecPoint() ; // start a new PPSD cluster
184 clu = (AliPHOSPpsdRecPoint *) ppsdl->At(fNumberOfPpsdClusters) ;
185 fNumberOfPpsdClusters++ ;
186 clu->AddDigit(*digit, Calibrate(digit->GetAmp()) ) ;
187 clusterdigitslist[iDigitInCluster] = (int* ) digit ;
189 tempodigitslist.Remove(digit) ;
192 // Here we remove resting EMC digits, which cannot make cluster
196 while( ( digit = (AliPHOSDigit *)nextdigit() ) ) {
199 tempodigitslist.Remove(digit) ;
211 AliPHOSDigit * digitN ;
213 while (index < iDigitInCluster){ // scan over digits already in cluster
214 digit = (AliPHOSDigit *) clusterdigitslist[index] ;
216 while ( (digitN = (AliPHOSDigit *)nextdigit()) ) { // scan over the reduced list of digits
217 Int_t ineb = AreNeighbours(digit, digitN); // call (digit,digitN) in THAT oder !!!!!
219 case 0 : // not a neighbour
221 case 1 : // are neighbours
222 clu->AddDigit( *digitN, Calibrate( digitN->GetAmp() ) ) ;
223 clusterdigitslist[iDigitInCluster] =(int*) digitN ;
225 tempodigitslist.Remove(digitN) ;
227 case 2 : // too far from each other
236 } // loop over cluster
238 } //below energy theshold
242 tempodigitslist.Clear() ;
245 //____________________________________________________________________________
246 void AliPHOSClusterizerv1::PrintParameters()
248 cout << "PHOS Clusterizer version 1 :" << endl
249 << " EMC Clustering threshold = " << fEmcClusteringThreshold << endl
250 << " EMC Energy threshold = " << fEmcEnergyThreshold << endl
251 << " PPSD Clustering threshold = " << fPpsdClusteringThreshold << endl
252 << " PPSD Energy threshold = " << fPpsdEnergyThreshold << endl ;