added THijing, CONTAINERS categories
[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
b2a60966 16/* $Id$ */
17
d72dfbc3 18/* $Log:
19 1 October 2000. Yuri Kharlov:
20 AreNeighbours()
21 PPSD upper layer is considered if number of layers>1
22
23 18 October 2000. Yuri Kharlov:
24 AliPHOSClusterizerv1()
25 CPV clusterizing parameters added
26
27 MakeClusters()
28 After first PPSD digit remove EMC digits only once
29*/
30
d15a28e7 31//_________________________________________________________________________
b2a60966 32// Implementation version 1 of the clusterization algorithm
33//
34//*-- Author: Yves Schutz (SUBATECH)
d15a28e7 35//////////////////////////////////////////////////////////////////////////////
36
ed4205d8 37#include <assert.h>
38
d15a28e7 39// --- ROOT system ---
40
41#include "TMath.h"
42
43// --- Standard library ---
44
de9ec31b 45#include <iostream.h>
d15a28e7 46
47// --- AliRoot header files ---
48
49#include "AliPHOSClusterizerv1.h"
50#include "AliPHOSDigit.h"
51#include "AliPHOSEmcRecPoint.h"
52#include "AliPHOSPpsdRecPoint.h"
0b06c60d 53#include "AliPHOSCpvRecPoint.h"
d15a28e7 54#include "AliPHOSv0.h"
55#include "AliRun.h"
56
57ClassImp(AliPHOSClusterizerv1)
58
59//____________________________________________________________________________
60AliPHOSClusterizerv1::AliPHOSClusterizerv1()
61{
b2a60966 62 // default ctor (to be used)
63
d15a28e7 64 fA = 0.;
65 fB = 0.01 ;
6b9b768e 66 fGeom = AliPHOSGeometry::GetInstance();
d15a28e7 67 fNumberOfEmcClusters = 0 ;
68 fNumberOfPpsdClusters = 0 ;
69 fEmcClusteringThreshold = 0.1;
70 fEmcEnergyThreshold = 0.01;
d72dfbc3 71 fPpsdClusteringThreshold = 0.0;
72 fPpsdEnergyThreshold = 0.1;
ed4205d8 73 fCpvClusteringThreshold = 0.0;
74 fCpvEnergyThreshold = 0.1;
d15a28e7 75 fW0 = 4.5 ;
76 fLocMaxCut = 0.06 ;
d72dfbc3 77 fW0CPV = 4.5 ;
78 fLocMaxCutCPV = 0.06 ;
d15a28e7 79}
80
81//____________________________________________________________________________
82Int_t AliPHOSClusterizerv1::AreNeighbours(AliPHOSDigit * d1, AliPHOSDigit * d2)
83{
b2a60966 84 // Gives the neighbourness of two digits = 0 are not neighbour but continue searching
85 // = 1 are neighbour
86 // = 2 are not neighbour but do not continue searching
87 // neighbours are defined as digits having at least common vertex
88 // The order of d1 and d2 is important: first (d1) should be a digit already in a cluster
89 // which is compared to a digit (d2) not yet in a cluster
90
d15a28e7 91 Int_t rv = 0 ;
92
d15a28e7 93 Int_t relid1[4] ;
6b9b768e 94 fGeom->AbsToRelNumbering(d1->GetId(), relid1) ;
d15a28e7 95
96 Int_t relid2[4] ;
6b9b768e 97 fGeom->AbsToRelNumbering(d2->GetId(), relid2) ;
d15a28e7 98
99 if ( (relid1[0] == relid2[0]) && (relid1[1]==relid2[1]) ) { // inside the same PHOS module and the same PPSD Module
92862013 100 Int_t rowdiff = TMath::Abs( relid1[2] - relid2[2] ) ;
101 Int_t coldiff = TMath::Abs( relid1[3] - relid2[3] ) ;
d15a28e7 102
92862013 103 if (( coldiff <= 1 ) && ( rowdiff <= 1 )){
d15a28e7 104 rv = 1 ;
105 }
106 else {
107 if((relid2[2] > relid1[2]) && (relid2[3] > relid1[3]+1))
108 rv = 2; // Difference in row numbers is too large to look further
109 }
110
111 }
112 else {
113
114 if( (relid1[0] < relid2[0]) || (relid1[1] < relid2[1]) )
115 rv=2 ;
116
117 }
d72dfbc3 118
119 //Do NOT clusterize upper PPSD
ed4205d8 120 if( IsInPpsd(d1) && IsInPpsd(d2) &&
121 relid1[1] > 0 &&
d72dfbc3 122 relid1[1] < fGeom->GetNumberOfPadsPhi()*fGeom->GetNumberOfPadsPhi() ) rv = 2 ;
123
d15a28e7 124 return rv ;
125}
126
127//____________________________________________________________________________
128void AliPHOSClusterizerv1::FillandSort(const DigitsList * dl, TObjArray * tl)
129{
b2a60966 130 // Copies the digits with energy above thershold and sorts the list
d15a28e7 131 // according to increasing Id number
132
d15a28e7 133 TIter next(dl) ;
134 AliPHOSDigit * digit ;
135
136 while ( (digit = (AliPHOSDigit *)next()) ) {
d15a28e7 137 Float_t ene = Calibrate(digit->GetAmp()) ;
f2bc1b87 138 if ( IsInEmc (digit) && ene > fEmcEnergyThreshold )
139 tl->Add(digit) ;
140 else if ( IsInPpsd (digit) && ene > fPpsdEnergyThreshold )
141 tl->Add(digit) ;
142 else if ( IsInCpv (digit) && ene > fCpvEnergyThreshold )
143 tl->Add(digit) ;
d15a28e7 144 }
145 tl->Sort() ;
146}
147
148//____________________________________________________________________________
149void AliPHOSClusterizerv1:: GetNumberOfClustersFound(Int_t * numb)
150{
b2a60966 151 // Fills numb with the number of EMC (numb[0]) clusters found
152 // PPSD (numb[1]) clusters found
153
154 numb[0] = fNumberOfEmcClusters ;
155 numb[1] = fNumberOfPpsdClusters ;
d15a28e7 156}
157
158//____________________________________________________________________________
159Bool_t AliPHOSClusterizerv1::IsInEmc(AliPHOSDigit * digit)
160{
b2a60966 161 // Tells if (true) or not (false) the digit is in a PHOS-EMC module
162
9f616d61 163 Bool_t rv = kFALSE ;
d15a28e7 164
d15a28e7 165 Int_t relid[4] ;
6b9b768e 166 fGeom->AbsToRelNumbering(digit->GetId(), relid) ;
d15a28e7 167
ed4205d8 168 if ( relid[1] == 0 ) rv = kTRUE;
169
170 return rv ;
171}
172
173//____________________________________________________________________________
174Bool_t AliPHOSClusterizerv1::IsInPpsd(AliPHOSDigit * digit)
175{
fad3e5b9 176 // Tells if (true) or not (false) the digit is in a PHOS-PPSD module
ed4205d8 177
178 Bool_t rv = kFALSE ;
179
180 Int_t relid[4] ;
181 fGeom->AbsToRelNumbering(digit->GetId(), relid) ;
182
183 if ( relid[1] > 0 && relid[0] > fGeom->GetNCPVModules() ) rv = kTRUE;
184
185 return rv ;
186}
187
188//____________________________________________________________________________
189Bool_t AliPHOSClusterizerv1::IsInCpv(AliPHOSDigit * digit)
190{
fad3e5b9 191 // Tells if (true) or not (false) the digit is in a PHOS-CPV module
ed4205d8 192
193 Bool_t rv = kFALSE ;
194
195 Int_t relid[4] ;
196 fGeom->AbsToRelNumbering(digit->GetId(), relid) ;
197
198 if ( relid[1] > 0 && relid[0] <= fGeom->GetNCPVModules() ) rv = kTRUE;
d15a28e7 199
200 return rv ;
201}
202
203//____________________________________________________________________________
88714635 204void AliPHOSClusterizerv1::MakeClusters(const DigitsList * dl,
205 AliPHOSRecPoint::RecPointsList * emcl,
fad3e5b9 206 AliPHOSRecPoint::RecPointsList * ppsdl)
d15a28e7 207{
b2a60966 208 // Steering method to construct the clusters stored in a list of Reconstructed Points
209 // A cluster is defined as a list of neighbour digits
c161df70 210
b73f246d 211 fNumberOfEmcClusters = 0 ;
c161df70 212 fNumberOfPpsdClusters = 0 ;
b73f246d 213 fNumberOfCpvClusters = 0 ;
c161df70 214
d15a28e7 215 // Fill and sort the working digits list
92862013 216 TObjArray tempodigitslist( dl->GetEntries() ) ;
217 FillandSort(dl, &tempodigitslist) ;
d15a28e7 218
219 // Clusterization starts
92862013 220 TIter nextdigit(&tempodigitslist) ;
d15a28e7 221 AliPHOSDigit * digit ;
92862013 222 Bool_t notremoved = kTRUE ;
6ad0bfa0 223
d15a28e7 224 while ( (digit = (AliPHOSDigit *)nextdigit()) ) { // scan over the list of digits
225 AliPHOSRecPoint * clu ;
c161df70 226
83974468 227 AliPHOSDigit ** clusterdigitslist = new AliPHOSDigit*[dl->GetEntries()] ;
d15a28e7 228 Int_t index ;
f2bc1b87 229
b73f246d 230 if (( IsInEmc (digit) && Calibrate(digit->GetAmp()) > fEmcClusteringThreshold ) ||
231 ( IsInPpsd(digit) && Calibrate(digit->GetAmp()) > fPpsdClusteringThreshold ) ||
232 ( IsInCpv (digit) && Calibrate(digit->GetAmp()) > fCpvClusteringThreshold ) ) {
f2bc1b87 233
d15a28e7 234 Int_t iDigitInCluster = 0 ;
235
6ad0bfa0 236 if ( IsInEmc(digit) ) {
83974468 237 // start a new EMC RecPoint
d72dfbc3 238 if(fNumberOfEmcClusters >= emcl->GetSize()) emcl->Expand(2*fNumberOfEmcClusters+1) ;
83974468 239 (*emcl)[fNumberOfEmcClusters] = new AliPHOSEmcRecPoint(fW0, fLocMaxCut) ;
6b9b768e 240 clu = (AliPHOSEmcRecPoint *) emcl->At(fNumberOfEmcClusters) ;
9f616d61 241 fNumberOfEmcClusters++ ;
242 clu->AddDigit(*digit, Calibrate(digit->GetAmp())) ;
83974468 243 clusterdigitslist[iDigitInCluster] = digit ;
9f616d61 244 iDigitInCluster++ ;
92862013 245 tempodigitslist.Remove(digit) ;
ca77b032 246
d72dfbc3 247 } else {
83974468 248
fad3e5b9 249 // start a new PPSD/CPV cluster
d72dfbc3 250 if(fNumberOfPpsdClusters >= ppsdl->GetSize()) ppsdl->Expand(2*fNumberOfPpsdClusters+1);
fad3e5b9 251 if (IsInPpsd(digit))
d72dfbc3 252 (*ppsdl)[fNumberOfPpsdClusters] = new AliPHOSPpsdRecPoint() ;
fad3e5b9 253 else
254 (*ppsdl)[fNumberOfPpsdClusters] = new AliPHOSCpvRecPoint(fW0CPV, fLocMaxCutCPV) ;
255 clu = (AliPHOSPpsdRecPoint *) ppsdl->At(fNumberOfPpsdClusters) ;
256 fNumberOfPpsdClusters++ ;
257
6ad0bfa0 258 clu->AddDigit(*digit, Calibrate(digit->GetAmp()) ) ;
83974468 259 clusterdigitslist[iDigitInCluster] = digit ;
9f616d61 260 iDigitInCluster++ ;
92862013 261 tempodigitslist.Remove(digit) ;
d15a28e7 262 nextdigit.Reset() ;
263
9f616d61 264 // Here we remove resting EMC digits, which cannot make cluster
fad3e5b9 265
92862013 266 if( notremoved ) {
9f616d61 267 while( ( digit = (AliPHOSDigit *)nextdigit() ) ) {
9f616d61 268 if( IsInEmc(digit) )
92862013 269 tempodigitslist.Remove(digit) ;
d15a28e7 270 else
271 break ;
d72dfbc3 272 }
273 notremoved = kFALSE ;
274 }
d15a28e7 275
276 } // else
277
278 nextdigit.Reset() ;
fad3e5b9 279
d15a28e7 280 AliPHOSDigit * digitN ;
281 index = 0 ;
9f616d61 282 while (index < iDigitInCluster){ // scan over digits already in cluster
83974468 283 digit = clusterdigitslist[index] ;
9f616d61 284 index++ ;
d15a28e7 285 while ( (digitN = (AliPHOSDigit *)nextdigit()) ) { // scan over the reduced list of digits
d72dfbc3 286 Int_t ineb = AreNeighbours(digit, digitN); // call (digit,digitN) in THAT oder !!!!!
d15a28e7 287 switch (ineb ) {
9f616d61 288 case 0 : // not a neighbour
d72dfbc3 289 break ;
9f616d61 290 case 1 : // are neighbours
83974468 291 clu->AddDigit(*digitN, Calibrate( digitN->GetAmp() ) ) ;
292 clusterdigitslist[iDigitInCluster] = digitN ;
9f616d61 293 iDigitInCluster++ ;
92862013 294 tempodigitslist.Remove(digitN) ;
d15a28e7 295 break ;
9f616d61 296 case 2 : // too far from each other
d15a28e7 297 goto endofloop;
298 } // switch
299
300 } // while digitN
fad3e5b9 301
d15a28e7 302 endofloop: ;
303 nextdigit.Reset() ;
304
305 } // loop over cluster
d72dfbc3 306 } //below energy theshold
307
31aa6d6c 308 delete[] clusterdigitslist ;
309
d15a28e7 310 } // while digit
311
92862013 312 tempodigitslist.Clear() ;
83974468 313
c161df70 314 ppsdl->Sort() ;
315 Int_t index ;
316 for(index = 0; index < ppsdl->GetEntries(); index++)
317 ((AliPHOSPpsdRecPoint *)ppsdl->At(index))->SetIndexInList(index) ;
d15a28e7 318}
319
320//____________________________________________________________________________
321void AliPHOSClusterizerv1::PrintParameters()
322{
b2a60966 323 // Print the energy thresholds
324
d15a28e7 325 cout << "PHOS Clusterizer version 1 :" << endl
326 << " EMC Clustering threshold = " << fEmcClusteringThreshold << endl
327 << " EMC Energy threshold = " << fEmcEnergyThreshold << endl
328 << " PPSD Clustering threshold = " << fPpsdClusteringThreshold << endl
ed4205d8 329 << " PPSD Energy threshold = " << fPpsdEnergyThreshold << endl
330 << " CPV Clustering threshold = " << fCpvClusteringThreshold << endl
331 << " CPV Energy threshold = " << fCpvEnergyThreshold << endl ;
d15a28e7 332}