test
[u/mrichter/AliRoot.git] / PHOS / AliPHOSClusterizerv1.cxx
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d15a28e7 1/**************************************************************************
2 * Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved. *
3 * *
4 * Author: The ALICE Off-line Project. *
5 * Contributors are mentioned in the code where appropriate. *
6 * *
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 **************************************************************************/
15
16//_________________________________________________________________________
17// A brief description of the class
18//*-- Author : Yves Schutz SUBATECH
19//////////////////////////////////////////////////////////////////////////////
20
21// --- ROOT system ---
22
23#include "TMath.h"
24
25// --- Standard library ---
26
27#include "iostream.h"
28
29// --- AliRoot header files ---
30
31#include "AliPHOSClusterizerv1.h"
32#include "AliPHOSDigit.h"
33#include "AliPHOSEmcRecPoint.h"
34#include "AliPHOSPpsdRecPoint.h"
35#include "AliPHOSv0.h"
36#include "AliRun.h"
37
38ClassImp(AliPHOSClusterizerv1)
39
40//____________________________________________________________________________
41AliPHOSClusterizerv1::AliPHOSClusterizerv1()
42{
43 fA = 0.;
44 fB = 0.01 ;
45 fNumberOfEmcClusters = 0 ;
46 fNumberOfPpsdClusters = 0 ;
47 fEmcClusteringThreshold = 0.1;
48 fEmcEnergyThreshold = 0.01;
49 fPpsdClusteringThreshold = 0.00000015;
50 fPpsdEnergyThreshold = 0.0000001;
51 fW0 = 4.5 ;
52 fLocMaxCut = 0.06 ;
53}
54
55//____________________________________________________________________________
56Int_t AliPHOSClusterizerv1::AreNeighbours(AliPHOSDigit * d1, AliPHOSDigit * d2)
57{
58 // neigbours are defined as digits having at least common virtix
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, which not clasterized yet
61 Int_t rv = 0 ;
62
63 AliPHOSGeometry * geom = AliPHOSGeometry::GetInstance() ;
64
65 Int_t relid1[4] ;
66 geom->AbsToRelNumbering(d1->GetId(), relid1) ;
67
68 Int_t relid2[4] ;
69 geom->AbsToRelNumbering(d2->GetId(), relid2) ;
70
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] ) ;
74
75 if (( ColDiff<=1 ) && ( RowDiff <= 1 )){
76 rv = 1 ;
77 }
78 else {
79 if((relid2[2] > relid1[2]) && (relid2[3] > relid1[3]+1))
80 rv = 2; // Difference in row numbers is too large to look further
81 }
82
83 }
84 else {
85
86 if( (relid1[0] < relid2[0]) || (relid1[1] < relid2[1]) )
87 rv=2 ;
88
89 }
90
91 return rv ;
92}
93
94//____________________________________________________________________________
95void AliPHOSClusterizerv1::FillandSort(const DigitsList * dl, TObjArray * tl)
96{
97 // copies the digits with energy above thershold and sorts the list
98 // according to increasing Id number
99
100
101 AliPHOSGeometry * geom = AliPHOSGeometry::GetInstance() ;
102 Int_t relid[4] ;
103
104 TIter next(dl) ;
105 AliPHOSDigit * digit ;
106
107 while ( (digit = (AliPHOSDigit *)next()) ) {
108
109 Int_t id = digit->GetId() ;
110 Float_t ene = Calibrate(digit->GetAmp()) ;
111 geom->AbsToRelNumbering(id, relid) ;
112
113 if(relid[1]==0){ // EMC
114 if ( ene > fEmcEnergyThreshold )
115 tl->Add(digit) ;
116 }
117
118 else { //Ppsd
119 if ( ene > fPpsdEnergyThreshold )
120 tl->Add(digit) ;
121 }
122
123 }
124 tl->Sort() ;
125}
126
127//____________________________________________________________________________
128void AliPHOSClusterizerv1:: GetNumberOfClustersFound(Int_t * numb)
129{
130 numb[0] = fNumberOfEmcClusters ;
131 numb[1] = fNumberOfPpsdClusters ;
132}
133
134//____________________________________________________________________________
135Bool_t AliPHOSClusterizerv1::IsInEmc(AliPHOSDigit * digit)
136{
137 Bool_t rv = kFALSE ;
138
139 AliPHOSGeometry * geom = AliPHOSGeometry::GetInstance() ;
140
141 Int_t relid[4] ;
142 geom->AbsToRelNumbering(digit->GetId(), relid) ;
143
144 if ( relid[1] == 0 )
145 rv = kTRUE;
146
147 return rv ;
148}
149
150//____________________________________________________________________________
151void AliPHOSClusterizerv1::MakeClusters(const DigitsList * dl, RecPointsList * emcl, RecPointsList * ppsdl)
152{
153
154 // Fill and sort the working digits list
155 TObjArray TempoDigitsList( dl->GetEntries() ) ;
156 this->FillandSort(dl, &TempoDigitsList) ;
157
158
159
160 // Clusterization starts
161 TIter nextdigit(&TempoDigitsList) ;
162 AliPHOSDigit * digit ;
163 Bool_t NotRemoved = kTRUE ;
164
165 while ( (digit = (AliPHOSDigit *)nextdigit()) ) { // scan over the list of digits
166 AliPHOSRecPoint * clu ;
167
168 int * ClusterDigitsList[dl->GetEntries()] ;
169 Int_t index ;
170 if (( (this->IsInEmc(digit)) && (Calibrate(digit->GetAmp()) > fEmcClusteringThreshold ) ) ||
171 ( (!this->IsInEmc(digit)) && (Calibrate(digit->GetAmp()) > fPpsdClusteringThreshold ) ) ) {
172
173 Int_t iDigitInCluster = 0 ;
174
175 if (this->IsInEmc(digit) ) {
176 new ((*emcl)[fNumberOfEmcClusters]) AliPHOSEmcRecPoint(fW0, fLocMaxCut) ;// start a new EMC RecPoint
177
178 clu = (AliPHOSEmcRecPoint *) (*emcl)[fNumberOfEmcClusters++] ;
179
180 clu->AddDigit(*digit,Calibrate(digit->GetAmp())) ;
181
182 ClusterDigitsList[iDigitInCluster++] = (int* ) digit ;
183 TempoDigitsList.Remove(digit) ;
184 }
185
186 else {
187 new ((*ppsdl)[fNumberOfPpsdClusters]) AliPHOSPpsdRecPoint() ;// start a new PPSD cluster
188 clu = (AliPHOSPpsdRecPoint *) ppsdl->At(fNumberOfPpsdClusters++) ;
189 clu->AddDigit(*digit,0.) ;
190 ClusterDigitsList[iDigitInCluster++] = (int* ) digit ;
191 TempoDigitsList.Remove(digit) ;
192 nextdigit.Reset() ;
193
194 //Here we remove resting EMC digits, which can not make cluster
195 if(NotRemoved){
196
197 while( (digit = (AliPHOSDigit *)nextdigit()) ){
198
199 if(IsInEmc(digit)) TempoDigitsList.Remove(digit) ;
200 else
201 break ;
202
203 }// while digit
204
205 } // if NotRemoved
206
207 } // else
208
209 nextdigit.Reset() ;
210
211 AliPHOSDigit * digitN ;
212 index = 0 ;
213 while (index < iDigitInCluster){ // scan over digits already in claster
214 digit = (AliPHOSDigit *) ClusterDigitsList[index++] ;
215
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 !!!!!
218 switch (ineb ) {
219 case 0 : // not a neibors
220 break ;
221 case 1 : // Are neibors
222 clu->AddDigit(*digitN,Calibrate(digitN->GetAmp())) ;
223 ClusterDigitsList[iDigitInCluster++] =(int*) digitN ;
224 TempoDigitsList.Remove(digitN) ;
225 break ;
226 case 2 : // to far from each other
227 goto endofloop;
228 } // switch
229
230 } // while digitN
231
232 endofloop: ;
233 nextdigit.Reset() ;
234
235 } // loop over cluster
236
237 } //below energy theshold
238
239 } // while digit
240
241 TempoDigitsList.Clear() ;
242}
243
244//____________________________________________________________________________
245void AliPHOSClusterizerv1::PrintParameters()
246{
247 cout << "PHOS Clusterizer version 1 :" << endl
248 << " EMC Clustering threshold = " << fEmcClusteringThreshold << endl
249 << " EMC Energy threshold = " << fEmcEnergyThreshold << endl
250 << " PPSD Clustering threshold = " << fPpsdClusteringThreshold << endl
251 << " PPSD Energy threshold = " << fPpsdEnergyThreshold << endl ;
252}