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 "AliITSDetTypeRec.h"
26 #include "AliRawReader.h"
27 #include "AliITSRawStreamSPD.h"
28 #include <TClonesArray.h>
29 #include "AliITSdigitSPD.h"
31 ClassImp(AliITSClusterFinderV2SPD)
33 extern AliRun *gAlice;
35 AliITSClusterFinderV2SPD::AliITSClusterFinderV2SPD(AliITSDetTypeRec* dettyp):AliITSClusterFinderV2(dettyp){
39 fLastSPD1=fDetTypeRec->GetITSgeom()->GetModuleIndex(2,1,1)-1;
41 fNySPD=256; fNzSPD=160;
43 fZ1pitchSPD=0.0425; fZ2pitchSPD=0.0625;
44 fHwSPD=0.64; fHlSPD=3.48;
45 fYSPD[0]=0.5*fYpitchSPD;
46 for (Int_t m=1; m<fNySPD; m++) fYSPD[m]=fYSPD[m-1]+fYpitchSPD;
48 for (Int_t m=1; m<fNzSPD; m++) {
49 Double_t dz=fZ1pitchSPD;
50 if (m==31 || m==32 || m==63 || m==64 || m==95 || m==96 ||
51 m==127 || m==128) dz=fZ2pitchSPD;
52 fZSPD[m]=fZSPD[m-1]+dz;
54 for (Int_t m=0; m<fNzSPD; m++) {
55 Double_t dz=0.5*fZ1pitchSPD;
56 if (m==31 || m==32 || m==63 || m==64 || m==95 || m==96 ||
57 m==127 || m==128) dz=0.5*fZ2pitchSPD;
64 void AliITSClusterFinderV2SPD::FindRawClusters(Int_t mod){
68 FindClustersSPD(fDigits);
72 void AliITSClusterFinderV2SPD::RawdataToClusters(AliRawReader* rawReader, TClonesArray** clusters){
73 //------------------------------------------------------------
74 // This function creates ITS clusters from raw data
75 //------------------------------------------------------------
77 AliITSRawStreamSPD inputSPD(rawReader);
78 FindClustersSPD(&inputSPD, clusters);
82 Int_t AliITSClusterFinderV2SPD::ClustersSPD(AliBin* bins, TClonesArray* digits,TClonesArray* clusters,Int_t maxBins,Int_t nzbins,Int_t iModule,Bool_t rawdata){
84 //Cluster finder for SPD (from digits and from rawdata)
87 for(Int_t iBin =0; iBin < maxBins;iBin++){
88 if(bins[iBin].IsUsed()) continue;
91 FindCluster(iBin,nzbins,bins,nBins,idxBins);
93 Error("ClustersSPD","SPD Too big cluster !\n");
97 for(Int_t ilab=0;ilab<10;ilab++){
101 milab[3]=fNdet[iModule];
103 Int_t ymin,ymax,zmin,zmax;
105 ymin = (idxBins[0] / nzbins) - 1;
107 zmin = (idxBins[0] % nzbins) - 1;
111 AliITSdigitSPD* dig = (AliITSdigitSPD*)digits->UncheckedAt(idxBins[0]);
112 ymin=dig->GetCoord2();
114 zmin=dig->GetCoord1();
117 for (Int_t idx = 0; idx < nBins; idx++) {
121 iy = (idxBins[idx] / nzbins) - 1;
122 iz = (idxBins[idx] % nzbins) - 1;
125 AliITSdigitSPD* dig = (AliITSdigitSPD*)digits->UncheckedAt(idxBins[idx]);
126 iy = dig->GetCoord2();
127 iz = dig->GetCoord1();
129 if (ymin > iy) ymin = iy;
130 if (ymax < iy) ymax = iy;
131 if (zmin > iz) zmin = iz;
132 if (zmax < iz) zmax = iz;
136 for(Int_t l=0;l<nBins;l++){
137 AliITSdigitSPD* dig = (AliITSdigitSPD*)digits->UncheckedAt(idxBins[l]);
138 for(Int_t dlab=0;dlab<10;dlab++){
139 Int_t digitlab = (dig->GetTracks())[dlab];
140 if(digitlab<0) continue;
141 AddLabel(milab,digitlab);
143 if (milab[9]>0) CheckLabels2(milab);
148 Int_t idy =0; //max 2 clusters
149 if((iModule <= fLastSPD1) &&idy<3) idy=3;
150 if((iModule > fLastSPD1) &&idy<4) idy=4;
152 for(Int_t iiz=zmin; iiz<=zmax;iiz+=idz){
153 for(Int_t iiy=ymin;iiy<=ymax;iiy+=idy){
156 Float_t y=0.,z=0.,q=0.;
157 for(Int_t idx=0;idx<nBins;idx++){
161 iy = (idxBins[idx] / nzbins)-1;
162 iz = (idxBins[idx] % nzbins)-1;
165 AliITSdigitSPD* dig = (AliITSdigitSPD*)digits->UncheckedAt(idxBins[idx]);
166 iy = dig->GetCoord2();
167 iz = dig->GetCoord1();
169 if(zmax-zmin>=idz || ymax-ymin>=idy){
170 if(TMath::Abs(iy-iiy)>0.75*idy) continue;
171 if(TMath::Abs(iz-iiz)>0.75*idz) continue;
175 if(rawdata) qBin = bins[idxBins[idx]].GetQ();
177 AliITSdigitSPD* dig = (AliITSdigitSPD*)digits->UncheckedAt(idxBins[idx]);
178 qBin = (Float_t)dig->GetSignal();
180 y+= qBin * fYSPD[iy];
181 z+= qBin * fZSPD[iz];
184 if(ndigits==0) continue;
189 Float_t hit[5]; //y,z,sigma(y)^2, sigma(z)^2, charge
190 hit[0] = -(-y+fYshift[iModule]);
191 if(iModule <= fLastSPD1) hit[0] = -hit[0];
192 hit[1] = -z+fZshift[iModule];
193 hit[2] = fYpitchSPD*fYpitchSPD/12.;
194 hit[3] = fZ1pitchSPD*fZ1pitchSPD/12.;
196 if(!rawdata) milab[3]=fNdet[iModule];
197 Int_t info[3] = {ymax-ymin+1,zmax-zmin+1,fNlayer[iModule]};
199 AliITSRecPoint cl(iModule,fDetTypeRec->GetITSgeom(),milab,hit,info);
200 fDetTypeRec->AddRecPoint(cl);
203 Int_t label[4]={milab[0],milab[1],milab[2],milab[3]};
204 new (clusters->AddrAt(nclu))
205 AliITSRecPoint(iModule,fDetTypeRec->GetITSgeom(),label, hit,info);
218 void AliITSClusterFinderV2SPD::FindClustersSPD(AliITSRawStream* input,
219 TClonesArray** clusters)
221 //------------------------------------------------------------
222 // Actual SPD cluster finder for raw data
223 //------------------------------------------------------------
224 Int_t nClustersSPD = 0;
225 Int_t kNzBins = fNzSPD + 2;
226 Int_t kNyBins = fNySPD + 2;
227 Int_t kMaxBin = kNzBins * kNyBins;
228 AliBin *binsSPD = new AliBin[kMaxBin];
229 AliBin *binsSPDInit = new AliBin[kMaxBin];
232 // read raw data input stream
234 Bool_t next = input->Next();
235 if (!next || input->IsNewModule()) {
236 Int_t iModule = input->GetPrevModuleID();
238 // when all data from a module was read, search for clusters
240 clusters[iModule] = new TClonesArray("AliITSRecPoint");
241 Int_t nClusters = ClustersSPD(bins,0,clusters[iModule],kMaxBin,kNzBins,iModule,kTRUE);
242 nClustersSPD += nClusters;
248 memcpy(binsSPD,binsSPDInit,sizeof(AliBin)*kMaxBin);
251 // fill the current digit into the bins array
252 Int_t index = (input->GetCoord2()+1) * kNzBins + (input->GetCoord1()+1);
253 bins[index].SetIndex(index);
254 bins[index].SetMask(1);
258 delete [] binsSPDInit;
261 Info("FindClustersSPD", "found clusters in ITS SPD: %d", nClustersSPD);
266 void AliITSClusterFinderV2SPD::FindClustersSPD(TClonesArray *digits) {
267 //------------------------------------------------------------
268 // Actual SPD cluster finder
269 //------------------------------------------------------------
272 Int_t kNzBins = fNzSPD + 2;
273 const Int_t kMAXBIN=kNzBins*(fNySPD+2);
275 Int_t ndigits=digits->GetEntriesFast();
276 AliBin *bins=new AliBin[kMAXBIN];
280 for (k=0; k<ndigits; k++) {
281 d=(AliITSdigitSPD*)digits->UncheckedAt(k);
282 Int_t i=d->GetCoord2()+1; //y
283 Int_t j=d->GetCoord1()+1;
284 Int_t index=i*kNzBins+j;
285 bins[index].SetIndex(k);
286 bins[index].SetMask(1);
289 ClustersSPD(bins,digits,0,kMAXBIN,kNzBins,fModule,kFALSE);