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 //
20 ///////////////////////////////////////////////////////////////////////////
23 #include "AliITSClusterFinderV2SPD.h"
24 #include "AliITSRecPoint.h"
25 #include "AliITSgeomTGeo.h"
26 #include "AliITSDetTypeRec.h"
27 #include "AliRawReader.h"
28 #include "AliITSRawStreamSPD.h"
29 #include <TClonesArray.h>
30 #include "AliITSdigitSPD.h"
32 ClassImp(AliITSClusterFinderV2SPD)
34 AliITSClusterFinderV2SPD::AliITSClusterFinderV2SPD(AliITSDetTypeRec* dettyp):AliITSClusterFinderV2(dettyp),
35 fLastSPD1(AliITSgeomTGeo::GetModuleIndex(2,1,1)-1),
46 fYSPD[0]=0.5*fYpitchSPD;
47 for (Int_t m=1; m<fNySPD; m++) fYSPD[m]=fYSPD[m-1]+fYpitchSPD;
49 for (Int_t m=1; m<fNzSPD; m++) {
50 Double_t dz=fZ1pitchSPD;
51 if (m==31 || m==32 || m==63 || m==64 || m==95 || m==96 ||
52 m==127 || m==128) dz=fZ2pitchSPD;
53 fZSPD[m]=fZSPD[m-1]+dz;
55 for (Int_t m=0; m<fNzSPD; m++) {
56 Double_t dz=0.5*fZ1pitchSPD;
57 if (m==31 || m==32 || m==63 || m==64 || m==95 || m==96 ||
58 m==127 || m==128) dz=0.5*fZ2pitchSPD;
65 void AliITSClusterFinderV2SPD::FindRawClusters(Int_t mod){
69 FindClustersSPD(fDigits);
73 void AliITSClusterFinderV2SPD::RawdataToClusters(AliRawReader* rawReader, TClonesArray** clusters){
74 //------------------------------------------------------------
75 // This function creates ITS clusters from raw data
76 //------------------------------------------------------------
78 AliITSRawStreamSPD inputSPD(rawReader);
79 FindClustersSPD(&inputSPD, clusters);
83 Int_t AliITSClusterFinderV2SPD::ClustersSPD(AliBin* bins, TClonesArray* digits,TClonesArray* clusters,Int_t maxBins,Int_t nzbins,Int_t iModule,Bool_t rawdata){
85 //Cluster finder for SPD (from digits and from rawdata)
87 const TGeoHMatrix *mT2L=AliITSgeomTGeo::GetTracking2LocalMatrix(iModule);
90 for(Int_t iBin =0; iBin < maxBins;iBin++){
91 if(bins[iBin].IsUsed()) continue;
94 FindCluster(iBin,nzbins,bins,nBins,idxBins);
96 Error("ClustersSPD","SPD Too big cluster !\n");
100 for(Int_t ilab=0;ilab<10;ilab++){
104 milab[3]=fNdet[iModule];
106 Int_t ymin,ymax,zmin,zmax;
108 ymin = (idxBins[0] / nzbins) - 1;
110 zmin = (idxBins[0] % nzbins) - 1;
114 AliITSdigitSPD* dig = (AliITSdigitSPD*)digits->UncheckedAt(idxBins[0]);
115 ymin=dig->GetCoord2();
117 zmin=dig->GetCoord1();
120 for (Int_t idx = 0; idx < nBins; idx++) {
124 iy = (idxBins[idx] / nzbins) - 1;
125 iz = (idxBins[idx] % nzbins) - 1;
128 AliITSdigitSPD* dig = (AliITSdigitSPD*)digits->UncheckedAt(idxBins[idx]);
129 iy = dig->GetCoord2();
130 iz = dig->GetCoord1();
132 if (ymin > iy) ymin = iy;
133 if (ymax < iy) ymax = iy;
134 if (zmin > iz) zmin = iz;
135 if (zmax < iz) zmax = iz;
139 for(Int_t l=0;l<nBins;l++){
140 AliITSdigitSPD* dig = (AliITSdigitSPD*)digits->UncheckedAt(idxBins[l]);
141 for(Int_t dlab=0;dlab<10;dlab++){
142 Int_t digitlab = (dig->GetTracks())[dlab];
143 if(digitlab<0) continue;
144 AddLabel(milab,digitlab);
146 if (milab[9]>0) CheckLabels2(milab);
151 Int_t idy =0; //max 2 clusters
152 if((iModule <= fLastSPD1) &&idy<3) idy=3;
153 if((iModule > fLastSPD1) &&idy<4) idy=4;
155 for(Int_t iiz=zmin; iiz<=zmax;iiz+=idz){
156 for(Int_t iiy=ymin;iiy<=ymax;iiy+=idy){
159 Float_t y=0.,z=0.,q=0.;
160 for(Int_t idx=0;idx<nBins;idx++){
164 iy = (idxBins[idx] / nzbins)-1;
165 iz = (idxBins[idx] % nzbins)-1;
168 AliITSdigitSPD* dig = (AliITSdigitSPD*)digits->UncheckedAt(idxBins[idx]);
169 iy = dig->GetCoord2();
170 iz = dig->GetCoord1();
172 if(zmax-zmin>=idz || ymax-ymin>=idy){
173 if(TMath::Abs(iy-iiy)>0.75*idy) continue;
174 if(TMath::Abs(iz-iiz)>0.75*idz) continue;
178 if(rawdata) qBin = bins[idxBins[idx]].GetQ();
180 AliITSdigitSPD* dig = (AliITSdigitSPD*)digits->UncheckedAt(idxBins[idx]);
181 qBin = (Float_t)dig->GetSignal();
183 y+= qBin * fYSPD[iy];
184 z+= qBin * fZSPD[iz];
187 if(ndigits==0) continue;
193 Float_t hit[5]; //y,z,sigma(y)^2, sigma(z)^2, charge
195 Double_t loc[3]={y,0.,z},trk[3]={0.,0.,0.};
196 mT2L->MasterToLocal(loc,trk);
200 hit[2] = fYpitchSPD*fYpitchSPD/12.;
201 hit[3] = fZ1pitchSPD*fZ1pitchSPD/12.;
204 if(!rawdata) milab[3]=fNdet[iModule];
205 Int_t info[3] = {ymax-ymin+1,zmax-zmin+1,fNlayer[iModule]};
207 AliITSRecPoint cl(milab,hit,info);
208 fDetTypeRec->AddRecPoint(cl);
211 Int_t label[4]={milab[0],milab[1],milab[2],milab[3]};
212 new (clusters->AddrAt(nclu))
213 AliITSRecPoint(label, hit,info);
226 void AliITSClusterFinderV2SPD::FindClustersSPD(AliITSRawStream* input,
227 TClonesArray** clusters)
229 //------------------------------------------------------------
230 // Actual SPD cluster finder for raw data
231 //------------------------------------------------------------
232 Int_t nClustersSPD = 0;
233 Int_t kNzBins = fNzSPD + 2;
234 Int_t kNyBins = fNySPD + 2;
235 Int_t kMaxBin = kNzBins * kNyBins;
236 AliBin *binsSPD = new AliBin[kMaxBin];
237 AliBin *binsSPDInit = new AliBin[kMaxBin];
240 // read raw data input stream
242 Bool_t next = input->Next();
243 if (!next || input->IsNewModule()) {
244 Int_t iModule = input->GetPrevModuleID();
246 // when all data from a module was read, search for clusters
248 clusters[iModule] = new TClonesArray("AliITSRecPoint");
249 Int_t nClusters = ClustersSPD(bins,0,clusters[iModule],kMaxBin,kNzBins,iModule,kTRUE);
250 nClustersSPD += nClusters;
256 memcpy(binsSPD,binsSPDInit,sizeof(AliBin)*kMaxBin);
259 // fill the current digit into the bins array
260 Int_t index = (input->GetCoord2()+1) * kNzBins + (input->GetCoord1()+1);
261 bins[index].SetIndex(index);
262 bins[index].SetMask(1);
266 delete [] binsSPDInit;
269 Info("FindClustersSPD", "found clusters in ITS SPD: %d", nClustersSPD);
274 void AliITSClusterFinderV2SPD::FindClustersSPD(TClonesArray *digits) {
275 //------------------------------------------------------------
276 // Actual SPD cluster finder
277 //------------------------------------------------------------
280 Int_t kNzBins = fNzSPD + 2;
281 const Int_t kMAXBIN=kNzBins*(fNySPD+2);
283 Int_t ndigits=digits->GetEntriesFast();
284 AliBin *bins=new AliBin[kMAXBIN];
288 for (k=0; k<ndigits; k++) {
289 d=(AliITSdigitSPD*)digits->UncheckedAt(k);
290 Int_t i=d->GetCoord2()+1; //y
291 Int_t j=d->GetCoord1()+1;
292 Int_t index=i*kNzBins+j;
293 bins[index].SetIndex(k);
294 bins[index].SetMask(1);
297 ClustersSPD(bins,digits,0,kMAXBIN,kNzBins,fModule,kFALSE);