1 /**************************************************************************
2 * Copyright(c) 1998-2003, 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 **************************************************************************/
15 ////////////////////////////////////////////////////////////////////////////
16 // Implementation of the ITS clusterer V2 class //
18 // Origin: Iouri Belikov, CERN, Jouri.Belikov@cern.ch //
19 // Unfolding switch from AliITSRecoParam: D. Elia, INFN Bari //
21 ////////////////////////////////////////////////////////////////////////////
24 #include "AliITSClusterFinderV2SPD.h"
25 #include "AliITSRecPoint.h"
26 #include "AliITSgeomTGeo.h"
27 #include "AliITSDetTypeRec.h"
28 #include "AliITSReconstructor.h"
29 #include "AliRawReader.h"
30 #include "AliITSRawStreamSPD.h"
31 #include <TClonesArray.h>
32 #include "AliITSdigitSPD.h"
34 ClassImp(AliITSClusterFinderV2SPD)
36 AliITSClusterFinderV2SPD::AliITSClusterFinderV2SPD(AliITSDetTypeRec* dettyp):AliITSClusterFinderV2(dettyp),
37 fLastSPD1(AliITSgeomTGeo::GetModuleIndex(2,1,1)-1),
48 fYSPD[0]=0.5*fYpitchSPD;
49 for (Int_t m=1; m<fNySPD; m++) fYSPD[m]=fYSPD[m-1]+fYpitchSPD;
51 for (Int_t m=1; m<fNzSPD; m++) {
52 Double_t dz=fZ1pitchSPD;
53 if (m==31 || m==32 || m==63 || m==64 || m==95 || m==96 ||
54 m==127 || m==128) dz=fZ2pitchSPD;
55 fZSPD[m]=fZSPD[m-1]+dz;
57 for (Int_t m=0; m<fNzSPD; m++) {
58 Double_t dz=0.5*fZ1pitchSPD;
59 if (m==31 || m==32 || m==63 || m==64 || m==95 || m==96 ||
60 m==127 || m==128) dz=0.5*fZ2pitchSPD;
67 void AliITSClusterFinderV2SPD::FindRawClusters(Int_t mod){
71 FindClustersSPD(fDigits);
75 void AliITSClusterFinderV2SPD::RawdataToClusters(AliRawReader* rawReader, TClonesArray** clusters){
76 //------------------------------------------------------------
77 // This function creates ITS clusters from raw data
78 //------------------------------------------------------------
80 AliITSRawStreamSPD inputSPD(rawReader);
81 FindClustersSPD(&inputSPD, clusters);
85 Int_t AliITSClusterFinderV2SPD::ClustersSPD(AliBin* bins, TClonesArray* digits,TClonesArray* clusters,Int_t maxBins,Int_t nzbins,Int_t iModule,Bool_t rawdata){
87 //Cluster finder for SPD (from digits and from rawdata)
89 static AliITSRecoParam *repa = NULL;
91 repa = (AliITSRecoParam*) AliITSReconstructor::GetRecoParam();
93 repa = (AliITSRecoParam*) AliITSReconstructor::GetRecoParamDefault();
94 AliWarning("Using default AliITSRecoParam class");
97 const TGeoHMatrix *mT2L=AliITSgeomTGeo::GetTracking2LocalMatrix(iModule);
100 for(Int_t iBin =0; iBin < maxBins;iBin++){
101 if(bins[iBin].IsUsed()) continue;
104 FindCluster(iBin,nzbins,bins,nBins,idxBins);
106 Error("ClustersSPD","SPD Too big cluster !\n");
110 for(Int_t ilab=0;ilab<10;ilab++){
114 milab[3]=fNdet[iModule];
116 Int_t ymin,ymax,zmin,zmax;
118 ymin = (idxBins[0] / nzbins) - 1;
120 zmin = (idxBins[0] % nzbins) - 1;
124 AliITSdigitSPD* dig = (AliITSdigitSPD*)digits->UncheckedAt(idxBins[0]);
125 ymin=dig->GetCoord2();
127 zmin=dig->GetCoord1();
130 for (Int_t idx = 0; idx < nBins; idx++) {
134 iy = (idxBins[idx] / nzbins) - 1;
135 iz = (idxBins[idx] % nzbins) - 1;
138 AliITSdigitSPD* dig = (AliITSdigitSPD*)digits->UncheckedAt(idxBins[idx]);
139 iy = dig->GetCoord2();
140 iz = dig->GetCoord1();
142 if (ymin > iy) ymin = iy;
143 if (ymax < iy) ymax = iy;
144 if (zmin > iz) zmin = iz;
145 if (zmax < iz) zmax = iz;
149 for(Int_t l=0;l<nBins;l++){
150 AliITSdigitSPD* dig = (AliITSdigitSPD*)digits->UncheckedAt(idxBins[l]);
151 for(Int_t dlab=0;dlab<10;dlab++){
152 Int_t digitlab = (dig->GetTracks())[dlab];
153 if(digitlab<0) continue;
154 AddLabel(milab,digitlab);
156 if (milab[9]>0) CheckLabels2(milab);
161 Int_t idy =0; //max 2 clusters
162 if((iModule <= fLastSPD1) &&idy<3) idy=3;
163 if((iModule > fLastSPD1) &&idy<4) idy=4;
166 // Switch the unfolding OFF/ON
167 if(!repa->GetUseUnfoldingInClusterFinderSPD()) {
172 for(Int_t iiz=zmin; iiz<=zmax;iiz+=idz){
173 for(Int_t iiy=ymin;iiy<=ymax;iiy+=idy){
176 Float_t y=0.,z=0.,q=0.;
177 for(Int_t idx=0;idx<nBins;idx++){
181 iy = (idxBins[idx] / nzbins)-1;
182 iz = (idxBins[idx] % nzbins)-1;
185 AliITSdigitSPD* dig = (AliITSdigitSPD*)digits->UncheckedAt(idxBins[idx]);
186 iy = dig->GetCoord2();
187 iz = dig->GetCoord1();
189 if(zmax-zmin>=idz || ymax-ymin>=idy){
190 if(TMath::Abs(iy-iiy)>0.75*idy) continue;
191 if(TMath::Abs(iz-iiz)>0.75*idz) continue;
195 if(rawdata) qBin = bins[idxBins[idx]].GetQ();
197 AliITSdigitSPD* dig = (AliITSdigitSPD*)digits->UncheckedAt(idxBins[idx]);
198 qBin = (Float_t)dig->GetSignal();
200 y+= qBin * fYSPD[iy];
201 z+= qBin * fZSPD[iz];
204 if(ndigits==0) continue;
210 Float_t hit[5]; //y,z,sigma(y)^2, sigma(z)^2, charge
212 Double_t loc[3]={y,0.,z},trk[3]={0.,0.,0.};
213 mT2L->MasterToLocal(loc,trk);
217 hit[2] = fYpitchSPD*fYpitchSPD/12.;
218 hit[3] = fZ1pitchSPD*fZ1pitchSPD/12.;
221 if(!rawdata) milab[3]=fNdet[iModule];
222 Int_t info[3] = {ymax-ymin+1,zmax-zmin+1,fNlayer[iModule]};
224 AliITSRecPoint cl(milab,hit,info);
225 fDetTypeRec->AddRecPoint(cl);
228 Int_t label[4]={milab[0],milab[1],milab[2],milab[3]};
229 new (clusters->AddrAt(nclu))
230 AliITSRecPoint(label, hit,info);
243 void AliITSClusterFinderV2SPD::FindClustersSPD(AliITSRawStream* input,
244 TClonesArray** clusters)
246 //------------------------------------------------------------
247 // Actual SPD cluster finder for raw data
248 //------------------------------------------------------------
249 Int_t nClustersSPD = 0;
250 Int_t kNzBins = fNzSPD + 2;
251 Int_t kNyBins = fNySPD + 2;
252 Int_t kMaxBin = kNzBins * kNyBins;
253 AliBin *binsSPD = new AliBin[kMaxBin];
254 AliBin *binsSPDInit = new AliBin[kMaxBin];
257 // read raw data input stream
259 Bool_t next = input->Next();
260 if (!next || input->IsNewModule()) {
261 Int_t iModule = input->GetPrevModuleID();
263 // when all data from a module was read, search for clusters
265 clusters[iModule] = new TClonesArray("AliITSRecPoint");
266 Int_t nClusters = ClustersSPD(bins,0,clusters[iModule],kMaxBin,kNzBins,iModule,kTRUE);
267 nClustersSPD += nClusters;
273 memcpy(binsSPD,binsSPDInit,sizeof(AliBin)*kMaxBin);
276 // fill the current digit into the bins array
277 Int_t index = (input->GetCoord2()+1) * kNzBins + (input->GetCoord1()+1);
278 bins[index].SetIndex(index);
279 bins[index].SetMask(1);
283 delete [] binsSPDInit;
286 AliDebug(1,Form("found clusters in ITS SPD: %d", nClustersSPD));
291 void AliITSClusterFinderV2SPD::FindClustersSPD(TClonesArray *digits) {
292 //------------------------------------------------------------
293 // Actual SPD cluster finder
294 //------------------------------------------------------------
297 Int_t kNzBins = fNzSPD + 2;
298 const Int_t kMAXBIN=kNzBins*(fNySPD+2);
300 Int_t ndigits=digits->GetEntriesFast();
301 AliBin *bins=new AliBin[kMAXBIN];
305 for (k=0; k<ndigits; k++) {
306 d=(AliITSdigitSPD*)digits->UncheckedAt(k);
307 Int_t i=d->GetCoord2()+1; //y
308 Int_t j=d->GetCoord1()+1;
309 Int_t index=i*kNzBins+j;
310 bins[index].SetIndex(k);
311 bins[index].SetMask(1);
314 Int_t nClustersSPD = ClustersSPD(bins,digits,0,kMAXBIN,kNzBins,fModule,kFALSE);
317 AliDebug(1,Form("found clusters in ITS SPD: %d", nClustersSPD));