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04366a57 1/**************************************************************************
2 * Copyright(c) 1998-2003, 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// Implementation of the ITS clusterer V2 class //
17// //
18// Origin: Iouri Belikov, CERN, Jouri.Belikov@cern.ch //
d6d232ba 19// Unfolding switch from AliITSRecoParam: D. Elia, INFN Bari //
04366a57 20// //
d6d232ba 21////////////////////////////////////////////////////////////////////////////
04366a57 22
04366a57 23
66b89079 24#include <TGeoGlobalMagField.h>
8d37cc87 25#include "AliITSCalibrationSPD.h"
04366a57 26#include "AliITSClusterFinderV2SPD.h"
00a7cc50 27#include "AliITSRecPoint.h"
1f3e997f 28#include "AliITSgeomTGeo.h"
7d62fb64 29#include "AliITSDetTypeRec.h"
d6d232ba 30#include "AliITSReconstructor.h"
04366a57 31#include "AliRawReader.h"
32#include "AliITSRawStreamSPD.h"
04366a57 33#include <TClonesArray.h>
04366a57 34#include "AliITSdigitSPD.h"
ad7f2bfa 35#include "AliITSFOSignalsSPD.h"
01ef1bd4 36#include "AliITSRecPointContainer.h"
66b89079 37#include "AliMagF.h"
38#include "AliITSsegmentationSPD.h"
04366a57 39
40ClassImp(AliITSClusterFinderV2SPD)
41
ad7f2bfa 42//__________________________________________________________________________
5d2c2f86 43AliITSClusterFinderV2SPD::AliITSClusterFinderV2SPD(AliITSDetTypeRec* dettyp):AliITSClusterFinder(dettyp),
1f3e997f 44fLastSPD1(AliITSgeomTGeo::GetModuleIndex(2,1,1)-1),
e56160b8 45fNySPD(256),
46fNzSPD(160),
47fYpitchSPD(0.0050),
48fZ1pitchSPD(0.0425),
49fZ2pitchSPD(0.0625),
50fHwSPD(0.64),
51fHlSPD(3.48){
04366a57 52
53 //Default constructor
04366a57 54
04366a57 55 fYSPD[0]=0.5*fYpitchSPD;
56 for (Int_t m=1; m<fNySPD; m++) fYSPD[m]=fYSPD[m-1]+fYpitchSPD;
57 fZSPD[0]=fZ1pitchSPD;
58 for (Int_t m=1; m<fNzSPD; m++) {
59 Double_t dz=fZ1pitchSPD;
60 if (m==31 || m==32 || m==63 || m==64 || m==95 || m==96 ||
61 m==127 || m==128) dz=fZ2pitchSPD;
62 fZSPD[m]=fZSPD[m-1]+dz;
63 }
64 for (Int_t m=0; m<fNzSPD; m++) {
65 Double_t dz=0.5*fZ1pitchSPD;
66 if (m==31 || m==32 || m==63 || m==64 || m==95 || m==96 ||
67 m==127 || m==128) dz=0.5*fZ2pitchSPD;
68 fZSPD[m]-=dz;
69 }
70
71}
ad7f2bfa 72//__________________________________________________________________________
04366a57 73void AliITSClusterFinderV2SPD::FindRawClusters(Int_t mod){
04366a57 74 //Find clusters V2
75 SetModule(mod);
76 FindClustersSPD(fDigits);
77
78}
ad7f2bfa 79//__________________________________________________________________________
01ef1bd4 80void AliITSClusterFinderV2SPD::RawdataToClusters(AliRawReader* rawReader){
ad7f2bfa 81 //------------------------------------------------------------
04366a57 82 // This function creates ITS clusters from raw data
83 //------------------------------------------------------------
84 rawReader->Reset();
85 AliITSRawStreamSPD inputSPD(rawReader);
01ef1bd4 86 FindClustersSPD(&inputSPD);
04366a57 87
88}
ad7f2bfa 89//__________________________________________________________________________
04366a57 90Int_t AliITSClusterFinderV2SPD::ClustersSPD(AliBin* bins, TClonesArray* digits,TClonesArray* clusters,Int_t maxBins,Int_t nzbins,Int_t iModule,Bool_t rawdata){
91
92 //Cluster finder for SPD (from digits and from rawdata)
66b89079 93 const Double_t kmictocm = 1.0e-4; // convert microns to cm.
94 const Double_t defaultField = 5.0; // default Bz value at which Tan(theta_Lorentz) is given in RecoParam
04366a57 95
5c47990a 96 static AliITSRecoParam *repa = NULL;
97 if(!repa){
98 repa = (AliITSRecoParam*) AliITSReconstructor::GetRecoParam();
99 if(!repa){
ed446fa3 100 repa = AliITSRecoParam::GetHighFluxParam();
5c47990a 101 AliWarning("Using default AliITSRecoParam class");
102 }
103 }
b4704be3 104 const TGeoHMatrix *mT2L=AliITSgeomTGeo::GetTracking2LocalMatrix(iModule);
8d37cc87 105
66b89079 106 // Lorentz angle correction
107 Double_t tanLorentzAngle=0;
108 AliITSsegmentationSPD *seg = (AliITSsegmentationSPD*)(GetDetTypeRec()->GetSegmentationModel(0));
109 Double_t thick = 0.5*kmictocm*seg->Dy(); // Half Thickness in cm
110 if(repa->GetCorrectLorentzAngleSPD()) { // only if CorrectLorentzAngleSPD required
111 // here retrieve the value of the field
112 AliMagF* field = dynamic_cast<AliMagF*>(TGeoGlobalMagField::Instance()->GetField());
045be90c 113 if (field == 0) {
66b89079 114 AliError("Cannot get magnetic field from TGeoGlobalMagField");
045be90c 115 }
116 else {
117 Float_t magField = field->SolenoidField();
118 tanLorentzAngle=repa->GetTanLorentzAngleHolesSPD() * magField / defaultField ;
119 }
66b89079 120 }
121 //
122
ad7f2bfa 123 if (repa->GetSPDRemoveNoisyFlag()) {
124 // Loop on noisy pixels and reset them
125 AliITSCalibrationSPD *cal =
126 (AliITSCalibrationSPD*) fDetTypeRec->GetCalibrationModel(iModule);
127 for(Int_t ipix = 0; ipix<cal->GetNrBad(); ipix++){
128 Int_t row, col;
129 cal->GetBadPixel(ipix,row,col);
190ba77d 130 //PH printf(" module %d row %d col %d \n",iModule,row,col);
ad7f2bfa 131 Int_t index = (row+1) * nzbins + (col+1);
132
133 bins[index].SetQ(0);
134 bins[index].SetMask(0xFFFFFFFE);
135 }
136 }
137
138 if (repa->GetSPDRemoveDeadFlag()) {
139 // Loop on dead pixels and reset them
140 AliITSCalibrationSPD *cal =
141 (AliITSCalibrationSPD*) fDetTypeRec->GetSPDDeadModel(iModule);
142 if (cal->IsBad()) return 0; // if all ladder is dead, return to save time
143 for(Int_t ipix = 0; ipix<cal->GetNrBad(); ipix++){
144 Int_t row, col;
145 cal->GetBadPixel(ipix,row,col);
146 Int_t index = (row+1) * nzbins + (col+1);
147 bins[index].SetQ(0);
148 bins[index].SetMask(0xFFFFFFFE);
149 }
8d37cc87 150 }
ad7f2bfa 151
04366a57 152 Int_t nclu=0;
153 for(Int_t iBin =0; iBin < maxBins;iBin++){
154 if(bins[iBin].IsUsed()) continue;
98a86dff 155 Int_t nBins = 0;
04366a57 156 Int_t idxBins[200];
157 FindCluster(iBin,nzbins,bins,nBins,idxBins);
158 if (nBins == 200){
159 Error("ClustersSPD","SPD Too big cluster !\n");
160 continue;
161 }
162 Int_t milab[10];
163 for(Int_t ilab=0;ilab<10;ilab++){
164 milab[ilab]=-2;
165 }
166 if(rawdata){
167 milab[3]=fNdet[iModule];
168 }
169 Int_t ymin,ymax,zmin,zmax;
170 if(rawdata){
171 ymin = (idxBins[0] / nzbins) - 1;
172 ymax = ymin;
173 zmin = (idxBins[0] % nzbins) - 1;
174 zmax = zmin;
175 }
176 else{
177 AliITSdigitSPD* dig = (AliITSdigitSPD*)digits->UncheckedAt(idxBins[0]);
178 ymin=dig->GetCoord2();
179 ymax=ymin;
180 zmin=dig->GetCoord1();
181 zmax=zmin;
182 }
190ba77d 183 //PH if(iModule == 24 || iModule == 25) printf("\n");
04366a57 184 for (Int_t idx = 0; idx < nBins; idx++) {
185 Int_t iy;
186 Int_t iz;
187 if(rawdata){
188 iy = (idxBins[idx] / nzbins) - 1;
189 iz = (idxBins[idx] % nzbins) - 1;
190 }
191 else{
192 AliITSdigitSPD* dig = (AliITSdigitSPD*)digits->UncheckedAt(idxBins[idx]);
193 iy = dig->GetCoord2();
194 iz = dig->GetCoord1();
ad7f2bfa 195 //if(iModule == 24 || iModule == 25) printf(" || iy %d iz %d in Module %d \n",iy,iz,iModule);
04366a57 196 }
197 if (ymin > iy) ymin = iy;
198 if (ymax < iy) ymax = iy;
199 if (zmin > iz) zmin = iz;
200 if (zmax < iz) zmax = iz;
201
202 }
203 if(!rawdata){
204 for(Int_t l=0;l<nBins;l++){
205 AliITSdigitSPD* dig = (AliITSdigitSPD*)digits->UncheckedAt(idxBins[l]);
206 for(Int_t dlab=0;dlab<10;dlab++){
207 Int_t digitlab = (dig->GetTracks())[dlab];
208 if(digitlab<0) continue;
209 AddLabel(milab,digitlab);
210 }
211 if (milab[9]>0) CheckLabels2(milab);
212 }
213 CheckLabels2(milab);
214 }
215
216 Int_t idy =0; //max 2 clusters
217 if((iModule <= fLastSPD1) &&idy<3) idy=3;
218 if((iModule > fLastSPD1) &&idy<4) idy=4;
219 Int_t idz=3;
d6d232ba 220
221 // Switch the unfolding OFF/ON
5c47990a 222 if(!repa->GetUseUnfoldingInClusterFinderSPD()) {
d6d232ba 223 idy=ymax-ymin+1;
224 idz=zmax-zmin+1;
225 }
98a86dff 226
04366a57 227 for(Int_t iiz=zmin; iiz<=zmax;iiz+=idz){
228 for(Int_t iiy=ymin;iiy<=ymax;iiy+=idy){
229
230 Int_t ndigits=0;
231 Float_t y=0.,z=0.,q=0.;
232 for(Int_t idx=0;idx<nBins;idx++){
233 Int_t iy;
234 Int_t iz;
235 if(rawdata){
236 iy = (idxBins[idx] / nzbins)-1;
237 iz = (idxBins[idx] % nzbins)-1;
238 }
239 else{
240 AliITSdigitSPD* dig = (AliITSdigitSPD*)digits->UncheckedAt(idxBins[idx]);
241 iy = dig->GetCoord2();
242 iz = dig->GetCoord1();
243 }
244 if(zmax-zmin>=idz || ymax-ymin>=idy){
245 if(TMath::Abs(iy-iiy)>0.75*idy) continue;
246 if(TMath::Abs(iz-iiz)>0.75*idz) continue;
247 }
248 ndigits++;
5af4a2d0 249 Float_t qBin=0.;
04366a57 250 if(rawdata) qBin = bins[idxBins[idx]].GetQ();
251 if(!rawdata){
252 AliITSdigitSPD* dig = (AliITSdigitSPD*)digits->UncheckedAt(idxBins[idx]);
253 qBin = (Float_t)dig->GetSignal();
254 }
255 y+= qBin * fYSPD[iy];
256 z+= qBin * fZSPD[iz];
257 q+= qBin;
258 }// for idx
259 if(ndigits==0) continue;
98a86dff 260
04366a57 261 y /= q;
262 z /= q;
263 y -= fHwSPD;
264 z -= fHlSPD;
1f3e997f 265
66b89079 266 // Lorentz drift effect in local y
267 y -= tanLorentzAngle*thick;
268 //
269
40f5092a 270 Float_t hit[6]; //y,z,sigma(y)^2, sigma(z)^2, charge
b4704be3 271 {
272 Double_t loc[3]={y,0.,z},trk[3]={0.,0.,0.};
273 mT2L->MasterToLocal(loc,trk);
274 hit[0]=trk[1];
275 hit[1]=trk[2];
276 }
04366a57 277 hit[2] = fYpitchSPD*fYpitchSPD/12.;
278 hit[3] = fZ1pitchSPD*fZ1pitchSPD/12.;
00a7cc50 279 hit[4] = 1.;
40f5092a 280 hit[5] = 0.;
b4704be3 281
04366a57 282 if(!rawdata) milab[3]=fNdet[iModule];
283 Int_t info[3] = {ymax-ymin+1,zmax-zmin+1,fNlayer[iModule]};
284 if(!rawdata){
75fb37cc 285 AliITSRecPoint cl(milab,hit,info);
98a86dff 286 cl.SetType(nBins);
00a7cc50 287 fDetTypeRec->AddRecPoint(cl);
04366a57 288 }
289 else{
290 Int_t label[4]={milab[0],milab[1],milab[2],milab[3]};
98a86dff 291 AliITSRecPoint cl(label, hit,info);
292 cl.SetType(nBins);
04366a57 293 new (clusters->AddrAt(nclu))
98a86dff 294 AliITSRecPoint(cl);
04366a57 295 }
296 nclu++;
297 }// for iiy
298 }// for iiz
299 }//end for iBin
300 return nclu;
301
302}
ad7f2bfa 303//__________________________________________________________________________
01ef1bd4 304void AliITSClusterFinderV2SPD::FindClustersSPD(AliITSRawStreamSPD* input)
04366a57 305{
306 //------------------------------------------------------------
ad7f2bfa 307 // SPD cluster finder for raw data (this method is called once per event)
308 // Now also fills fast-or fired map
04366a57 309 //------------------------------------------------------------
01ef1bd4 310
311 AliITSRecPointContainer* rpc = AliITSRecPointContainer::Instance();
04366a57 312 Int_t nClustersSPD = 0;
313 Int_t kNzBins = fNzSPD + 2;
314 Int_t kNyBins = fNySPD + 2;
315 Int_t kMaxBin = kNzBins * kNyBins;
d7d9347b 316 AliBin *binsSPD = new AliBin[kMaxBin];
317 AliBin *binsSPDInit = new AliBin[kMaxBin];
04366a57 318 AliBin* bins = NULL;
319
320 // read raw data input stream
321 while (kTRUE) {
322 Bool_t next = input->Next();
323 if (!next || input->IsNewModule()) {
324 Int_t iModule = input->GetPrevModuleID();
325
326 // when all data from a module was read, search for clusters
327 if (bins) {
01ef1bd4 328 TClonesArray* clusters = rpc->UncheckedGetClusters(iModule);
329 Int_t nClusters = ClustersSPD(bins,0,clusters,kMaxBin,kNzBins,iModule,kTRUE);
04366a57 330 nClustersSPD += nClusters;
d7d9347b 331 bins = NULL;
04366a57 332 }
333
334 if (!next) break;
d7d9347b 335 bins = binsSPD;
336 memcpy(binsSPD,binsSPDInit,sizeof(AliBin)*kMaxBin);
04366a57 337 }
338
190ba77d 339 if (next && bins) {
ad7f2bfa 340 // fill the current digit into the bins array
341 Int_t index = (input->GetCoord2()+1) * kNzBins + (input->GetCoord1()+1);
342 bins[index].SetIndex(index);
343 bins[index].SetQ(1);
344 bins[index].SetMask(1);
ff44c37c 345 }
346 }
347
d7d9347b 348 delete [] binsSPDInit;
349 delete [] binsSPD;
350
3b1d8321 351 AliDebug(1,Form("found clusters in ITS SPD: %d", nClustersSPD));
352
ad7f2bfa 353
354 // Fill the FastOr fired map
355 for (UInt_t eq=0; eq<20; eq++) {
356 for (UInt_t hs=0; hs<6; hs++) {
357 for (UInt_t chip=0; chip<10; chip++) {
358 if (input->GetFastOrSignal(eq,hs,chip)) {
359 fDetTypeRec->SetFastOrFiredMapOnline(eq,hs,chip);
360 }
361 }
362 }
363 }
364
04366a57 365}
ad7f2bfa 366//__________________________________________________________________________
04366a57 367void AliITSClusterFinderV2SPD::FindClustersSPD(TClonesArray *digits) {
368 //------------------------------------------------------------
ad7f2bfa 369 // SPD cluster finder for digits (this method is called for each module)
370 // Now also fills the fast-or fired map
04366a57 371 //------------------------------------------------------------
372
373
374 Int_t kNzBins = fNzSPD + 2;
375 const Int_t kMAXBIN=kNzBins*(fNySPD+2);
376
377 Int_t ndigits=digits->GetEntriesFast();
378 AliBin *bins=new AliBin[kMAXBIN];
379
ad7f2bfa 380 Int_t idig;
381 AliITSdigitSPD *digit=0;
382 for (idig=0; idig<ndigits; idig++) {
383 digit=(AliITSdigitSPD*)digits->UncheckedAt(idig);
384 Int_t i=digit->GetCoord2()+1; //y
385 Int_t j=digit->GetCoord1()+1;
386 Int_t index=i*kNzBins+j;
387
388 bins[index].SetIndex(idig);
389 bins[index].SetQ(1);
390 bins[index].SetMask(1);
04366a57 391 }
ad7f2bfa 392
04366a57 393
d6d232ba 394 Int_t nClustersSPD = ClustersSPD(bins,digits,0,kMAXBIN,kNzBins,fModule,kFALSE);
04366a57 395 delete [] bins;
d6d232ba 396
813020f4 397 AliDebug(1,Form("found clusters in ITS SPD: %d", nClustersSPD));
ad7f2bfa 398
399 // Fill the FastOr fired map
400 AliITSFOSignalsSPD* foSignals = fDetTypeRec->GetFOSignals();
401 if (foSignals) {
402 UInt_t eq = AliITSRawStreamSPD::GetOnlineEqIdFromOffline(fModule);
403 UInt_t hs = AliITSRawStreamSPD::GetOnlineHSFromOffline(fModule);
404 for(UInt_t ch=0; ch<5; ch++) {
405 UInt_t chip = AliITSRawStreamSPD::GetOnlineChipFromOffline(fModule,ch*32);
406 if (foSignals->GetSignal(eq,hs,chip)) {
407 fDetTypeRec->SetFastOrFiredMapOnline(eq,hs,chip);
408 }
409 }
410 }
411
04366a57 412}