Extra header added to the list
[u/mrichter/AliRoot.git] / HMPID / HMPIDrec / AliHMPIDTracker.cxx
1 #include "AliHMPIDTracker.h"     //class header
2 #include "AliHMPIDtrack.h"       //class header
3 #include "AliHMPIDCluster.h"     //GetTrackPoint(),PropagateBack() 
4 #include "AliHMPIDParam.h"       //GetTrackPoint(),PropagateBack()
5 #include "AliHMPIDPid.h"         //Recon(),reconHTA()
6 #include "AliHMPIDRecon.h"       //Recon()
7 #include "AliHMPIDRecoParamV1.h"   //Recon()
8 #include "AliHMPIDReconstructor.h"//Recon()
9 #include "AliHMPIDReconHTA.h"    //ReconHTA()
10 #include <AliLog.h>              //Recon()  
11 #include <AliESDEvent.h>         //PropagateBack(),Recon()  
12 #include <AliESDtrack.h>         //Intersect() 
13 #include <AliTracker.h> 
14 #include <AliRun.h>              //GetTrackPoint(),PropagateBack()  
15 #include <AliTrackPointArray.h>  //GetTrackPoint()
16 #include <AliAlignObj.h>         //GetTrackPoint()
17 #include <AliCDBManager.h>       //PropageteBack()
18 #include <AliCDBEntry.h>         //PropageteBack()
19 #include "TTreeStream.h"         // debug streamer
20 //
21 // HMPID base class fo tracking
22 //.
23 //.
24 //.
25 ClassImp(AliHMPIDTracker)
26 //++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
27 AliHMPIDTracker::AliHMPIDTracker():
28   AliTracker(),
29   fClu(new TObjArray(AliHMPIDParam::kMaxCh+1)),
30   fDebugStreamer(0)
31 {
32 // ctor. Create TObjArray of TClonesArray of AliHMPIDCluster  
33 // 
34 //  
35   fClu->SetOwner(kTRUE);
36   for(int i=AliHMPIDParam::kMinCh;i<=AliHMPIDParam::kMaxCh;i++) fClu->AddAt(new TClonesArray("AliHMPIDCluster"),i);
37   fDebugStreamer = new TTreeSRedirector("HMPIDdebug.root");
38
39 }//ctor
40
41
42 AliHMPIDTracker::~AliHMPIDTracker(){
43   //
44   // destructor
45   // 
46   delete fClu;
47   if (fDebugStreamer) delete fDebugStreamer;
48 }
49
50 //++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++    
51 Bool_t AliHMPIDTracker::GetTrackPoint(Int_t idx, AliTrackPoint& point) const
52 {
53 // Interface callback methode invoked from AliReconstruction::WriteAlignmentData() to get position of MIP cluster in MARS associated to a current track.
54 // MIP cluster is reffered by index which is stored in AliESDtrack  ???????
55 // Arguments: idx- cluster index which is stored by HMPID in AliESDtrack
56 //            point- reference to the object where to store the point     
57 //   Returns: status of operation  if FALSE then AliReconstruction::WriteAlignmentData() do not store this point to array of points for current track. 
58   if(idx<0) return kFALSE; //no MIP cluster assigned to this track in PropagateBack()
59   Int_t iCham=idx/1000000; Int_t iClu=idx%1000000;
60   iClu = iClu%1000; //GetHMPIDcluIdx -> 1e+6*ch + 1e+3*clusize + cluIdx;
61   point.SetVolumeID(AliGeomManager::LayerToVolUID(AliGeomManager::kHMPID,iCham));//layer and chamber number
62   TClonesArray *pArr=(TClonesArray*)(*fClu)[iCham];
63   if(!pArr) return kFALSE;
64   AliHMPIDCluster *pClu=(AliHMPIDCluster*)pArr->UncheckedAt(iClu);//get pointer to cluster
65   if(!pClu) return kFALSE;
66   Float_t xyz[3];
67   pClu->GetGlobalXYZ(xyz);
68   Float_t cov[6];
69   pClu->GetGlobalCov(cov);
70   point.SetXYZ(xyz,cov);
71   return kTRUE;
72 }//GetTrackPoint()
73 //++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
74 Int_t AliHMPIDTracker::IntTrkCha(AliESDtrack *pTrk,Float_t &xPc,Float_t &yPc,Float_t &xRa,Float_t &yRa,Float_t &theta,Float_t &phi)
75 {
76 // Static method to find intersection in between given track and HMPID chambers
77 // Arguments: pTrk- ESD track; xPc,yPc- track intersection with PC in LORS [cm]
78 //   Returns: intersected chamber ID or -1
79   AliHMPIDtrack *hmpTrk = new AliHMPIDtrack(*pTrk);                                             //create a hmpid track to be used for propagation and matching 
80   for(Int_t i=AliHMPIDParam::kMinCh;i<=AliHMPIDParam::kMaxCh;i++){                              //chambers loop
81     Int_t chInt = IntTrkCha(i,hmpTrk,xPc,yPc,xRa,yRa,theta,phi);
82     if(chInt>=0) {delete hmpTrk;hmpTrk=0x0;return chInt;}
83   }                                                                                             //chambers loop
84   delete hmpTrk; hmpTrk=0x0;
85   return -1;                                                                                    //no intersection with HMPID chambers
86 }//IntTrkCha()
87 //++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
88 Int_t AliHMPIDTracker::IntTrkCha(Int_t ch,AliHMPIDtrack *pTrk,Float_t &xPc,Float_t &yPc,Float_t &xRa,Float_t &yRa,Float_t &theta,Float_t &phi)
89 {
90 // Static method to find intersection in between given track and HMPID chambers
91 // Arguments: pTrk- HMPID track; xPc,yPc- track intersection with PC in LORS [cm]
92 //   Returns: intersected chamber ID or -1
93     AliHMPIDParam *pParam=AliHMPIDParam::Instance();
94     Double_t p1[3],n1[3]; 
95     pParam->Norm(ch,n1); 
96     pParam->Point(ch,p1,AliHMPIDParam::kRad);                                                    //point & norm  for middle of radiator plane
97     Double_t p2[3],n2[3]; 
98     pParam->Norm(ch,n2);
99     pParam->Point(ch,p2,AliHMPIDParam::kPc);                                                     //point & norm  for entrance to PC plane
100     if(pTrk->Intersect(p1,n1)==kFALSE) return -1;                                                //try to intersect track with the middle of radiator
101     if(pTrk->Intersect(p2,n2)==kFALSE) return -1;   
102     pParam->Mars2LorsVec(ch,n1,theta,phi);                                                       //track angles at RAD
103     pParam->Mars2Lors   (ch,p1,xRa,yRa);                                                         //TRKxRAD position
104     pParam->Mars2Lors   (ch,p2,xPc,yPc);                                                         //TRKxPC position
105     if(AliHMPIDParam::IsInside(xPc,yPc,pParam->DistCut())==kTRUE) return ch;                     //return intersected chamber  
106   return -1;                                                                                     //no intersection with HMPID chambers
107 }//IntTrkCha()
108 //++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
109 Int_t AliHMPIDTracker::LoadClusters(TTree *pCluTree)
110 {
111 // Interface callback methode invoked from AliReconstruction::RunTracking() to load HMPID clusters before PropagateBack() gets control. Done once per event.
112 // Arguments: pCluTree- pointer to clusters tree got by AliHMPIDLoader::LoadRecPoints("read") then AliHMPIDLoader::TreeR()
113 //   Returns: error code (currently ignored in AliReconstruction::RunTraking())    
114   for(int i=AliHMPIDParam::kMinCh;i<=AliHMPIDParam::kMaxCh;i++) pCluTree->SetBranchAddress(Form("HMPID%d",i),&((*fClu)[i]));
115   pCluTree->GetEntry(0);
116   return 0;  
117 }//LoadClusters()
118 //++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
119 Int_t AliHMPIDTracker::PropagateBack(AliESDEvent *pEsd)
120 {
121 // Interface pure virtual in AliTracker. Invoked from AliReconstruction::RunTracking() after invocation of AliTracker::LoadClusters() once per event
122 // Agruments: pEsd - pointer to ESD
123 //   Returns: error code    
124   AliCDBEntry *pNmeanEnt =AliCDBManager::Instance()->Get("HMPID/Calib/Nmean"); //contains TObjArray of 42 TF1 + 1 EPhotMean
125   AliCDBEntry *pQthreEnt =AliCDBManager::Instance()->Get("HMPID/Calib/Qthre"); //contains TObjArray of 42 (7ch * 6sec) TF1
126   if(!pNmeanEnt) AliError("No Nmean C6F14 ");
127   if(!pQthreEnt) AliError("No Qthre");
128     
129   return Recon(pEsd,fClu,(TObjArray*)pNmeanEnt->GetObject(),(TObjArray*)pQthreEnt->GetObject());  
130 }//PropagateBack()
131 //++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
132 Int_t AliHMPIDTracker::Recon(AliESDEvent *pEsd,TObjArray *pClus,TObjArray *pNmean, TObjArray *pQthre)
133 {
134 // Static method to reconstruct the Cherenkov angle for all valid tracks of a given event.
135 // Arguments: pEsd- pointer ESD; pClu- pointer to clusters for all chambers; pNmean - pointer to all function Nmean=f(time)
136 // Returns: error code, 0 if no errors   
137 //
138 // Algortihm: Loop over tracks
139 //
140 // 1. Find the closest MIP cluster using fast tracks extrapolation method
141 // 2. Propagate track to the MIP cluster using the STEER method
142 // 3. Update the track information with MIP cluster (Improved angular and position resolution - to be used for Cherenkov angle calculation)
143 // 4. Propagate back the constrained track to the radiator radius ( not exact yet)
144 // 5. Propagation in the last 10 cm with the fast method 
145 // 6. Set ESDtrack information
146 // 7. Calculate the Cherenkov angle
147
148   const Double_t kMaxSnp=0.9;   //maximal snp for prolongation
149   const Double_t kdRadiator=10; // distance between radiator and the plane
150   AliHMPIDRecon recon;                                                                           //instance of reconstruction class, nothing important in ctor
151   AliHMPIDParam *pParam = AliHMPIDParam::Instance();                                             //Instance of AliHMPIDParam
152   Float_t xPc,yPc,xRa,yRa,theta,phi;
153   
154   Double_t cluLORS[2]={0};
155   Int_t nMipClusTot=0;
156   
157   Double_t qthre = 0;   Double_t nmean=0; Int_t hvsec=0;
158 //  Int_t nClusCh[AliHMPIDParam::kMaxCh+1];
159
160   Bool_t tsRight = kTRUE;
161   
162   UInt_t tsmin = (UInt_t)((TF1*)pQthre->At(0))->GetXmin();                                        //
163   UInt_t tsmax = (UInt_t)((TF1*)pQthre->At(0))->GetXmax();                                        //
164   UInt_t ts = pEsd->GetTimeStamp();
165   
166   if(ts<tsmin || ts>tsmax) {
167     AliWarning(Form(" in HMPID time stamp out of range!!! Please check!!! ts = %i",ts));
168     tsRight = kFALSE;
169   }
170    
171   for(Int_t iTrk=0;iTrk<pEsd->GetNumberOfTracks();iTrk++){                                        //loop on the ESD tracks in the event
172            
173     //    Double_t bestChi2=99999;chi2=99999;                                                     //init. track matching params
174 //    Double_t dmin=999999,bz=0,distCut=1,distParams[5]={1};
175     Double_t dmin=999999,distCut=1,distParams[5]={1};
176
177     Bool_t isOkDcut=kFALSE;
178     Bool_t isOkQcut=kFALSE;
179     Bool_t isMatched=kFALSE;
180     
181     AliHMPIDCluster *bestHmpCluster=0x0;                                                          //the best matching cluster
182     AliESDtrack *pTrk = pEsd->GetTrack(iTrk);                                                     //get reconstructed track   
183     
184     if(!pTrk->IsOn(AliESDtrack::kTPCout)) continue;
185  
186     if(pTrk->IsOn(AliESDtrack::kTPCrefit)) continue;
187     AliESDfriendTrack *ftrack= (AliESDfriendTrack *)pTrk->GetFriendTrack();
188     if (!ftrack) continue; 
189     if (!ftrack->GetTPCOut()) continue;
190     AliHMPIDtrack *hmpTrk = new AliHMPIDtrack(*pTrk);                                             //create a hmpid track to be used for propagation and matching 
191     AliHMPIDtrack *hmpTrkConstrained = 0;                                                         //create a hmpid track to be used for propagation and matching 
192     hmpTrk->Set(ftrack->GetTPCOut()->GetX(), ftrack->GetTPCOut()->GetAlpha(),ftrack->GetTPCOut()->GetParameter(), ftrack->GetTPCOut()->GetCovariance());
193     //
194     //bz=AliTracker::GetBz();
195           
196     //initial flags for HMPID ESD infos    
197     pTrk->SetHMPIDtrk(0,0,0,0);                                                                //no intersection found
198     pTrk->SetHMPIDmip(0,0,0,0);                                                                //store mip info in any case 
199     pTrk->SetHMPIDcluIdx(99,99999);                                                            //chamber not found, mip not yet considered
200     pTrk->SetHMPIDsignal(AliHMPIDRecon::kNotPerformed);                                        //ring reconstruction not yet performed
201     
202     Int_t ipCh=IntTrkCha(pTrk,xPc,yPc,xRa,yRa,theta,phi);                                        //find the intersected chamber for this track 
203     if(ipCh<0) {delete hmpTrk;hmpTrk=0x0;continue;}                                                                         //no intersection at all, go after next track
204
205     pTrk->SetHMPIDtrk(xPc,yPc,theta,phi);                                                        //store initial infos
206     pTrk->SetHMPIDcluIdx(ipCh,9999);                                                             //set chamber, index of cluster + cluster size
207     
208     // track intersects the chamber ipCh: find the MIP          
209     
210     TClonesArray *pMipCluLst=(TClonesArray *)pClus->At(ipCh);                                   //get the list of clusters
211     nMipClusTot = pMipCluLst->GetEntries();                                                     //total number of clusters in the given chamber
212    // nClusCh[ipCh] = nMipClusTot;
213     
214     if(nMipClusTot==0) {delete hmpTrk;hmpTrk=0x0;continue;}                                                                         
215     
216     Int_t index=-1;                                                                               //index of the "best" matching cluster
217     //
218     // 1. Find the closest MIP cluster using fast tracks extrapolation method
219     //
220     for (Int_t iClu=0; iClu<nMipClusTot;iClu++) {                                                 //clusters loop
221       
222       AliHMPIDCluster *pClu=(AliHMPIDCluster*)pMipCluLst->UncheckedAt(iClu);                      //get the cluster
223       // evaluate qThre
224       if(tsRight){
225         if(pQthre->GetEntriesFast()==pParam->kMaxCh+1) {
226           qthre=((TF1*)pQthre->At(pClu->Ch()))->Eval(ts);                                          //
227         } else {                                                                                   // in the past just 1 qthre
228           hvsec = pParam->InHVSector(pClu->Y());                                                   //  per chamber
229           if(hvsec>=0) qthre=((TF1*)pQthre->At(6*ipCh+hvsec))->Eval(ts);                                     //
230         } 
231       } else qthre = pParam->QCut();
232       
233       //      
234       if(pClu->Q()<qthre) continue;                                                                      //charge compartible with MIP clusters      
235       isOkQcut = kTRUE;
236       //
237       cluLORS[0]=pClu->X(); cluLORS[1]=pClu->Y();                                                        //get the LORS coordinates of the cluster
238       Double_t dist = TMath::Sqrt((xPc-cluLORS[0])*(xPc-cluLORS[0])+(yPc-cluLORS[1])*(yPc-cluLORS[1]));
239       
240       if(dist<dmin) {
241         dmin = dist;
242         index=iClu;
243         bestHmpCluster=pClu;
244       }
245     } // clusters loop
246
247     // moved down
248     /*if(!isOkQcut) {
249       pTrk->SetHMPIDsignal(pParam->kMipQdcCut);
250       delete hmpTrk;hmpTrk=0x0; continue;                                                                     
251     }*/
252     
253     //
254     // 2. Propagate track to the MIP cluster using the STEER method
255     //
256         
257     if(!bestHmpCluster) {delete hmpTrk;hmpTrk=0x0; delete hmpTrkConstrained;hmpTrkConstrained=0x0;  continue;}     
258         
259     TVector3 vG = pParam->Lors2Mars(ipCh,bestHmpCluster->X(),bestHmpCluster->Y());    
260     Double_t gx = vG[0];
261     Double_t gy = vG[1];
262     Double_t gz = vG[2];
263     Double_t alpha=TMath::ATan2(gy,gx);
264     Double_t radiusH=TMath::Sqrt(gy*gy+gx*gx);
265     if (!(hmpTrk->Rotate(alpha,kTRUE))) continue;
266     if(!AliTrackerBase::PropagateTrackToBxByBz(hmpTrk,radiusH,pTrk->GetMass(),1,kFALSE,kMaxSnp,-1)) {delete hmpTrk;hmpTrk=0x0; delete hmpTrkConstrained;hmpTrkConstrained=0x0; continue;}    
267     //
268     // 3. Update the track with MIP cluster (Improved angular and position resolution - to be used for Cherenkov angle calculation)
269     //
270     AliExternalTrackParam trackC(*hmpTrk);
271     Double_t posC[2]={0,gz};
272     Double_t covC[3]={0.1*0.1, 0, 0.1*0.1};
273     trackC.Update(posC,covC);
274     //
275     // 4. Propagate back the constrained track to the radiator radius ( not exact yet)
276     //
277     hmpTrkConstrained = new AliHMPIDtrack(*pTrk);
278     hmpTrkConstrained->Set(trackC.GetX(), trackC.GetAlpha(),trackC.GetParameter(), trackC.GetCovariance());
279     if(!AliTrackerBase::PropagateTrackToBxByBz(hmpTrkConstrained,radiusH-kdRadiator,pTrk->GetMass(),1,kFALSE,kMaxSnp,1)) {delete hmpTrk;hmpTrk=0x0; delete hmpTrkConstrained;hmpTrkConstrained=0x0;continue;}
280     //
281     // 5. Propagation in the last 10 cm with the fast method 
282     //
283     Float_t xPc0=0, yPc0=0;
284     
285     IntTrkCha(ipCh, hmpTrk, xPc0,yPc0,xRa,yRa,theta,phi);  
286     IntTrkCha(ipCh, hmpTrkConstrained, xPc,yPc,xRa,yRa,theta,phi);  
287     //
288     // 6. Set ESDtrack information
289     //
290     Int_t cluSiz = bestHmpCluster->Size();
291     pTrk->SetHMPIDmip(bestHmpCluster->X(),bestHmpCluster->Y(),(Int_t)bestHmpCluster->Q(),0);  //store mip info in any case 
292     pTrk->SetHMPIDcluIdx(ipCh,index+1000*cluSiz);                                             //set chamber, index of cluster + cluster size    
293     pTrk->SetHMPIDtrk(xPc0,yPc0,theta,phi);
294     //
295     //
296     // Dump debug info if specified
297     // 
298     if (AliHMPIDReconstructor::StreamLevel()>0) {       
299       AliExternalTrackParam * trackTPC=new AliExternalTrackParam(*(ftrack->GetTPCOut()));
300       AliExternalTrackParam * trackCurrent=new AliExternalTrackParam(*pTrk);      
301       if(!trackTPC->Rotate(alpha)) continue;
302       if(!trackCurrent->Rotate(alpha)) continue;      
303       Bool_t statusTPC= AliTracker::PropagateTrackToBxByBz(trackTPC,radiusH,pTrk->GetMass(),1,kFALSE,kMaxSnp,-1);      
304       Bool_t statusCurrent=AliTracker::PropagateTrackToBxByBz(trackCurrent,radiusH,pTrk->GetMass(),1,kFALSE,kMaxSnp,-1);  
305       AliExternalTrackParam * trackTPCNB=new AliExternalTrackParam(*(ftrack->GetTPCOut()));
306       if(!trackTPCNB->Rotate(alpha)) continue;
307       Bool_t statusTPCNB=kTRUE;
308       Double_t bfield[3]={0,0,0};
309       for (Double_t radius=trackTPCNB->GetX(); radius<radiusH; radius+=1){
310         Double_t xyz[3];
311         trackTPCNB->GetXYZ(xyz);
312         GetBxByBz(xyz,bfield);
313         statusTPCNB&=trackTPCNB->PropagateToBxByBz(radius,bfield);
314       }
315       statusTPCNB&=trackTPCNB->PropagateToBxByBz(radiusH,bfield);
316       //        
317       Double_t tanAlpha=TMath::Tan(TMath::ASin(trackTPC->GetSnp()));
318       Double_t deltaC= trackTPC->GetC(AliTrackerBase::GetBz())-ftrack->GetTPCOut()->GetC(AliTrackerBase::GetBz());    
319       //
320       AliExternalTrackParam * trackTPCConstrained= new AliExternalTrackParam(*trackTPC);
321       Double_t pos[2]={0,gz};
322       Double_t cov[3]={0.1*0.1, 0, 0.1*0.1};
323       Double_t chi2C =  trackTPCConstrained->GetPredictedChi2(pos,cov);
324       trackTPCConstrained->Update(pos,cov);
325       (*fDebugStreamer)<<"track"<<
326         "rH="<<radiusH<<                      // radius of cluster
327         "angle="<<tanAlpha<<                  // tan of the local inlination angle
328         "dC="<<deltaC<<                       // delta of the curvature
329         "trackTPC.="<<trackTPC<<              // TPC outer param extrapolated to the HMPID
330         "trackTPCNB.="<<trackTPCNB<<          // TPC track prpagated with material budget correction
331         "chi2C="<<chi2C<<
332         "trackTPCC.="<<trackTPCConstrained<<  // TPC outer param extrapolated to the HMPID constrained
333         "trackCurrent.="<<trackCurrent<<      // current track extrapolated to the HMPID
334         "sTPC="<<statusTPC<<                  // status for the current TPC  track
335         "sCurrent="<<statusCurrent<<          // status for the current global track
336         "cl.="<<bestHmpCluster<<              // HMPID cluster
337         //
338         "t.="<<pTrk<<                        // curent esd track
339         "ft.="<<ftrack<<                     // friend track
340         "hmpTrk.="<<hmpTrk<<                 // hmpid tracks as used in the following code
341         "hmpTrkC.="<<hmpTrkConstrained<<     // constrained hmpid tracks as used in the following code
342         "gx="<<gx<<                          // global cluster position X
343         "gy="<<gy<<                          // Y
344         "gz="<<gz<<                          // Z
345         "\n";
346     }                 
347     //
348     //
349     //    
350     if(!isOkQcut) {
351       pTrk->SetHMPIDsignal(pParam->kMipQdcCut);
352       delete hmpTrk;hmpTrk=0x0; 
353       delete hmpTrkConstrained;hmpTrkConstrained=0x0; 
354       continue;                                                                     
355     }        
356     
357     if(AliHMPIDReconstructor::GetRecoParam())                                                 //retrieve distance cut
358     {
359       if(AliHMPIDReconstructor::GetRecoParam()->IsFixedDistCut()==kTRUE)                      //distance cut is fixed number
360       { 
361         distCut=AliHMPIDReconstructor::GetRecoParam()->GetHmpTrackMatchingDist();
362       }
363       else 
364       {
365         for(Int_t ipar=0;ipar<5;ipar++) distParams[ipar]=AliHMPIDReconstructor::GetRecoParam()->GetHmpTrackMatchingDistParam(ipar);      //prevision: distance cut is function of momentum
366         distCut=distParams[0]+distParams[1]*TMath::Power(distParams[2]*pTrk->GetP(),distParams[3]); //prevision: change functional form to be more precise
367       }
368     }
369     else {distCut=pParam->DistCut();}
370      
371     //dmin recalculated
372     
373     dmin = TMath::Sqrt((xPc0-bestHmpCluster->X())*(xPc0-bestHmpCluster->X())+(yPc0-bestHmpCluster->Y())*(yPc0-bestHmpCluster->Y()));
374              
375     if(dmin < distCut) {
376       isOkDcut = kTRUE;
377     }   
378     //isOkDcut = kTRUE; // switch OFF cut
379     
380     if(!isOkDcut) {
381       pTrk->SetHMPIDsignal(pParam->kMipDistCut);                                                //closest cluster with enough charge is still too far from intersection
382     }
383     
384     if(isOkQcut*isOkDcut) isMatched = kTRUE;                                                    // MIP-Track matched !!    
385     
386     if(!isMatched) {delete hmpTrk;hmpTrk=0x0;delete hmpTrkConstrained;hmpTrkConstrained=0x0;continue;}                                           // If matched continue...
387
388     Bool_t isOk = kTRUE; 
389     if(!isOk) {delete hmpTrk;hmpTrk=0x0; delete hmpTrkConstrained;hmpTrkConstrained=0x0; continue;}
390     pTrk->SetOuterHmpParam(hmpTrkConstrained,AliESDtrack::kHMPIDout);                 
391
392     FillResiduals(hmpTrk,bestHmpCluster,kFALSE);
393  
394     Int_t iRad = pParam->Radiator(yRa);                                                          //evaluate the radiator involved
395     
396     //evaluate nMean
397     if(tsRight){
398      if(pNmean->GetEntries()==21) {                                                              //for backward compatibility
399        nmean=((TF1*)pNmean->At(3*ipCh))->Eval(ts);                                               //C6F14 Nmean for this chamber
400      } else {
401        if(iRad < 0) {
402         nmean = -1;
403        } else {
404        Double_t tLow  = ((TF1*)pNmean->At(6*ipCh+2*iRad  ))->Eval(ts);                           //C6F14 low  temp for this chamber
405        Double_t tHigh = ((TF1*)pNmean->At(6*ipCh+2*iRad+1))->Eval(ts);                           //C6F14 high temp for this chamber
406        Double_t tExp  = pParam->FindTemp(tLow,tHigh,yRa);                                        //estimated temp for that chamber at that y
407        nmean = pParam->NIdxRad(AliHMPIDParam::Instance()->GetEPhotMean(),tExp);                  //mean ref idx @ a given temp
408        }
409        if(nmean < 0){                                                                            //track didn' t pass through the radiator
410          pTrk->SetHMPIDsignal(AliHMPIDRecon::kNoRad);                                           //set the appropriate flag
411          pTrk->SetHMPIDcluIdx(ipCh,index+1000*cluSiz);                                          //set index of cluster
412          delete hmpTrk;hmpTrk=0x0; 
413          delete hmpTrkConstrained;hmpTrkConstrained=0x0; 
414          continue;
415         }
416      }
417     } else nmean = pParam->MeanIdxRad();    
418     //
419     // 7. Calculate the Cherenkov angle
420     //
421     recon.SetImpPC(xPc0,yPc0);                                                                     //store track impact to PC           
422     recon.CkovAngle(pTrk,(TClonesArray *)pClus->At(ipCh),index,nmean,xRa,yRa);                   //search for Cerenkov angle of this track
423     
424     Double_t thetaCkov = pTrk->GetHMPIDsignal();
425     
426     if (AliHMPIDReconstructor::StreamLevel()>0) {       
427       AliExternalTrackParam * trackTPC=new AliExternalTrackParam(*(ftrack->GetTPCOut()));
428       AliExternalTrackParam * trackCurrent=new AliExternalTrackParam(*pTrk);      
429       if(!trackTPC->Rotate(alpha)) continue;
430       if(!trackCurrent->Rotate(alpha)) continue;      
431       Bool_t statusTPC= AliTracker::PropagateTrackToBxByBz(trackTPC,radiusH,pTrk->GetMass(),1,kFALSE,kMaxSnp,-1);      
432       Bool_t statusCurrent=AliTracker::PropagateTrackToBxByBz(trackCurrent,radiusH,pTrk->GetMass(),1,kFALSE,kMaxSnp,-1);    
433       Double_t tanAlpha=TMath::Tan(TMath::ASin(trackTPC->GetSnp()));
434       Double_t deltaC= trackTPC->GetC(AliTrackerBase::GetBz())-ftrack->GetTPCOut()->GetC(AliTrackerBase::GetBz());    
435       //
436       AliExternalTrackParam * trackTPCNB=new AliExternalTrackParam(*(ftrack->GetTPCOut()));
437       if(!trackTPCNB->Rotate(alpha)) continue;
438       Bool_t statusTPCNB=kTRUE;
439       Double_t bfield[3]={0,0,0};
440       for (Double_t radius=trackTPCNB->GetX(); radius<radiusH; radius+=1){
441         Double_t xyz[3];
442         trackTPCNB->GetXYZ(xyz);
443         GetBxByBz(xyz,bfield);
444         statusTPCNB&=trackTPCNB->PropagateToBxByBz(radius,bfield);
445       }
446       statusTPCNB&=trackTPCNB->PropagateToBxByBz(radiusH,bfield);
447
448       AliExternalTrackParam * trackTPCConstrained= new AliExternalTrackParam(*trackTPC);
449       Double_t pos[2]={0,gz};
450       Double_t cov[3]={0.1*0.1, 0, 0.1*0.1};
451       Double_t chi2C =  trackTPCConstrained->GetPredictedChi2(pos,cov);
452       trackTPCConstrained->Update(pos,cov);
453       (*fDebugStreamer)<<"track2"<<
454         "rH="<<radiusH<<                      // radius of cluster
455         "angle="<<tanAlpha<<                  // tan of the local inlination angle
456         "dC="<<deltaC<<                       // delta of the curvature
457         "trackTPC.="<<trackTPC<<              // TPC outer param extrapolated to the HMPID
458         "trackTPCNB.="<<trackTPCNB<<          // TPC outer param extrapolated to the HMPID
459         "chi2C="<<chi2C<<
460         "trackTPCC.="<<trackTPCConstrained<<  // TPC outer param extrapolated to the HMPID constrained
461         "trackCurrent.="<<trackCurrent<<      // current track extrapolated to the HMPID
462         "sTPC="<<statusTPC<<                  // status for the current TPC  track
463         "sCurrent="<<statusCurrent<<          // status for the current global track
464         "cl.="<<bestHmpCluster<<              // HMPID cluster
465         //
466         "t.="<<pTrk<<                         // curent esd track
467         "ft.="<<ftrack<<                      // friend track
468         "hmpTrk.="<<hmpTrk<<                  // hmpid tracks as used in the following code
469         "hmpTrkC.="<<hmpTrkConstrained<<      // constrained hmpid tracks as used in the following code
470         "gx="<<gx<<                           // global cluster position X
471         "gy="<<gy<<                           // Y
472         "gz="<<gz<<                           // Z
473         "thetaCkov="<<thetaCkov<<             // Cherenkov angle
474         "\n";
475     } 
476                 
477     if(pTrk->GetHMPIDsignal()<0) {
478       delete hmpTrk;hmpTrk=0x0;
479       delete hmpTrkConstrained; hmpTrkConstrained=0x0;
480       continue;}
481         
482     AliHMPIDPid pID;
483     Double_t prob[5];
484     pID.FindPid(pTrk,nmean,5,prob);
485     pTrk->SetHMPIDpid(prob);
486     delete hmpTrk; hmpTrk=0x0;
487     delete hmpTrkConstrained; hmpTrkConstrained=0x0;
488   }//iTrk
489
490   return 0; // error code: 0=no error;
491 }//Recon()
492 //++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
493 Int_t AliHMPIDTracker::ReconFromKin(AliESDEvent *pEsd,TObjArray *pClus,TObjArray *pNmean, TObjArray *pQthre)
494 {
495 // Static method to reconstruct Theta Ckov for all valid tracks of a given event.
496 // Arguments: pEsd- pointer ESD; pClu- pointer to clusters for all chambers; pNmean - pointer to all function Nmean=f(time)
497 //   Returns: error code, 0 if no errors   
498   
499   AliHMPIDRecon recon;                                                                           //instance of reconstruction class, nothing important in ctor
500   AliHMPIDParam *pParam = AliHMPIDParam::Instance();                                             //Instance of AliHMPIDParam
501   Float_t xPc,yPc,xRa,yRa,theta,phi;
502   Double_t cluLORS[2]={0};
503   Int_t nMipClusTot=0;
504   Double_t qthre = 0;   Double_t nmean=0; Int_t hvsec=0;
505   //Int_t nClusCh[AliHMPIDParam::kMaxCh+1];
506
507   Bool_t tsRight = kTRUE;
508   
509   UInt_t tsmin = (UInt_t)((TF1*)pQthre->At(0))->GetXmin();                                        //
510   UInt_t tsmax = (UInt_t)((TF1*)pQthre->At(0))->GetXmax();                                        //
511   UInt_t ts = pEsd->GetTimeStamp();
512   
513   if(ts<tsmin || ts>tsmax) {
514     AliWarning(Form(" in HMPID time stamp out of range!!! Please check!!! ts = %i",ts));
515     tsRight = kFALSE;
516   }
517    
518   for(Int_t iTrk=0;iTrk<pEsd->GetNumberOfTracks();iTrk++){                                        //loop on the ESD tracks in the event
519            
520     Double_t dmin=999999,distCut=1,distParams[5]={1};
521
522     Bool_t isOkDcut=kFALSE;
523     Bool_t isOkQcut=kFALSE;
524     Bool_t isMatched=kFALSE;
525     
526     AliHMPIDCluster *bestHmpCluster=0x0;                                                          //the best matching cluster
527     AliESDtrack *pTrk = pEsd->GetTrack(iTrk);                                                     //get reconstructed track   
528     
529     AliHMPIDtrack *hmpTrk = new AliHMPIDtrack(*pTrk);                                             //create a hmpid track to be used for propagation and matching 
530    // bz=AliTracker::GetBz();  
531 //initial flags for HMPID ESD infos    
532     pTrk->SetHMPIDtrk(0,0,0,0);                                                                //no intersection found
533     pTrk->SetHMPIDmip(0,0,0,0);                                                                //store mip info in any case 
534     pTrk->SetHMPIDcluIdx(99,99999);                                                            //chamber not found, mip not yet considered
535     pTrk->SetHMPIDsignal(AliHMPIDRecon::kNotPerformed);                                        //ring reconstruction not yet performed
536     
537     Int_t ipCh=IntTrkCha(pTrk,xPc,yPc,xRa,yRa,theta,phi);                                        //find the intersected chamber for this track 
538     if(ipCh<0) {delete hmpTrk;hmpTrk=0x0;continue;}                                                                         //no intersection at all, go after next track
539
540     pTrk->SetHMPIDtrk(xPc,yPc,theta,phi);                                                        //store initial infos
541     pTrk->SetHMPIDcluIdx(ipCh,9999);                                                             //set chamber, index of cluster + cluster size
542     
543 // track intersects the chamber ipCh: find the MIP          
544     
545     TClonesArray *pMipCluLst=(TClonesArray *)pClus->At(ipCh);                                   //get the list of clusters
546     nMipClusTot = pMipCluLst->GetEntries();                                                     //total number of clusters in the given chamber
547    // nClusCh[ipCh] = nMipClusTot;
548     
549     if(nMipClusTot==0) {delete hmpTrk;hmpTrk=0x0;continue;}                                                                         
550     
551     Int_t index=-1;                                                                             //index of the "best" matching cluster
552     
553     for (Int_t iClu=0; iClu<nMipClusTot;iClu++) {                                               //clusters loop
554       
555       AliHMPIDCluster *pClu=(AliHMPIDCluster*)pMipCluLst->UncheckedAt(iClu);                    //get the cluster
556 // evaluate qThre
557       if(tsRight){
558        if(pQthre->GetEntriesFast()==pParam->kMaxCh+1) {
559          qthre=((TF1*)pQthre->At(pClu->Ch()))->Eval(ts);                                         //
560        } else {                                                                                  // in the past just 1 qthre
561          hvsec = pParam->InHVSector(pClu->Y());                                                  //  per chamber
562          if(hvsec>=0) qthre=((TF1*)pQthre->At(6*ipCh+hvsec))->Eval(ts);                                     //
563         } 
564       } else qthre = pParam->QCut();
565             
566 //      
567       if(pClu->Q()<qthre) continue;                                                                      //charge compartible with MIP clusters      
568       isOkQcut = kTRUE;
569 //
570       cluLORS[0]=pClu->X(); cluLORS[1]=pClu->Y();                                            //get the LORS coordinates of the cluster
571       Double_t dist = TMath::Sqrt((xPc-cluLORS[0])*(xPc-cluLORS[0])+(yPc-cluLORS[1])*(yPc-cluLORS[1]));
572       
573       if(dist<dmin) {
574         dmin = dist;
575         index=iClu;
576         bestHmpCluster=pClu;
577       }
578     } // clusters loop
579
580     if(!isOkQcut) {
581       pTrk->SetHMPIDsignal(pParam->kMipQdcCut);
582       delete hmpTrk;hmpTrk=0x0; continue;                                                                     
583     }
584
585     Double_t radius = (pParam->Lors2Mars(ipCh,pParam->SizeAllX()/2,pParam->SizeAllY()/2)).Mag(); 
586     
587     if(!AliTracker::PropagateTrackToBxByBz(hmpTrk,radius,pTrk->GetMass(),1,kFALSE)) {delete hmpTrk;hmpTrk=0x0;continue;}
588               
589     if(!hmpTrk->PropagateTo(bestHmpCluster)) {delete hmpTrk;hmpTrk=0x0;continue;}
590
591     Int_t cluSiz = bestHmpCluster->Size();
592     pTrk->SetHMPIDmip(bestHmpCluster->X(),bestHmpCluster->Y(),(Int_t)bestHmpCluster->Q(),0);  //store mip info in any case 
593     pTrk->SetHMPIDcluIdx(ipCh,index+1000*cluSiz);                                             //set chamber, index of cluster + cluster size
594
595     if(AliHMPIDReconstructor::GetRecoParam())                                                 //retrieve distance cut
596     {
597       if(AliHMPIDReconstructor::GetRecoParam()->IsFixedDistCut()==kTRUE)                      //distance cut is fixed number
598       { 
599         distCut=AliHMPIDReconstructor::GetRecoParam()->GetHmpTrackMatchingDist();
600       }
601       else 
602       {
603         for(Int_t ipar=0;ipar<5;ipar++) distParams[ipar]=AliHMPIDReconstructor::GetRecoParam()->GetHmpTrackMatchingDistParam(ipar);      //prevision: distance cut is function of momentum
604         distCut=distParams[0]+distParams[1]*TMath::Power(distParams[2]*pTrk->GetP(),distParams[3]); //prevision: change functional form to be more precise
605       }
606     }
607     else {distCut=pParam->DistCut();}
608       
609     if(dmin < distCut) {
610       isOkDcut = kTRUE;
611     }   
612     
613     if(!isOkDcut) {
614       pTrk->SetHMPIDsignal(pParam->kMipDistCut);                                                //closest cluster with enough charge is still too far from intersection
615     }
616     
617     if(isOkQcut*isOkDcut) isMatched = kTRUE;                                                    // MIP-Track matched !!    
618     
619     if(!isMatched) {delete hmpTrk;hmpTrk=0x0;continue;}                                           // If matched continue...
620
621     Bool_t isOk = hmpTrk->Update(bestHmpCluster,0.1,0);
622     if(!isOk) {delete hmpTrk;hmpTrk=0x0;continue;}
623     pTrk->SetOuterHmpParam(hmpTrk,AliESDtrack::kHMPIDout);                 
624
625     FillResiduals(hmpTrk,bestHmpCluster,kFALSE);
626  
627     Int_t iRad     = pParam->Radiator(yRa);                                                      //evaluate the radiator involved
628     
629     //evaluate nMean
630     if(tsRight){
631      if(pNmean->GetEntries()==21) {                                                              //for backward compatibility
632        nmean=((TF1*)pNmean->At(3*ipCh))->Eval(ts);                                               //C6F14 Nmean for this chamber
633      } else {
634        if(iRad < 0) {
635         nmean = -1;
636        } else {
637        Double_t tLow  = ((TF1*)pNmean->At(6*ipCh+2*iRad  ))->Eval(ts);                           //C6F14 low  temp for this chamber
638        Double_t tHigh = ((TF1*)pNmean->At(6*ipCh+2*iRad+1))->Eval(ts);                           //C6F14 high temp for this chamber
639        Double_t tExp  = pParam->FindTemp(tLow,tHigh,yRa);                                        //estimated temp for that chamber at that y
640        nmean = pParam->NIdxRad(AliHMPIDParam::Instance()->GetEPhotMean(),tExp);                  //mean ref idx @ a given temp
641        }
642        if(nmean < 0){                                                                            //track didn' t pass through the radiator
643          pTrk->SetHMPIDsignal(AliHMPIDRecon::kNoRad);                                           //set the appropriate flag
644          pTrk->SetHMPIDcluIdx(ipCh,index+1000*cluSiz);                                          //set index of cluster
645          delete hmpTrk;hmpTrk=0x0; 
646          continue;
647         }
648       }
649     } else nmean = pParam->MeanIdxRad();
650     
651     //
652     recon.SetImpPC(xPc,yPc);                                                                     //store track impact to PC
653     recon.CkovAngle(pTrk,(TClonesArray *)pClus->At(ipCh),index,nmean,xRa,yRa);                   //search for Cerenkov angle of this track
654
655     if(pTrk->GetHMPIDsignal()<0) {delete hmpTrk;hmpTrk=0x0;continue;}
656         
657     AliHMPIDPid pID;
658     Double_t prob[5];
659     pID.FindPid(pTrk,nmean,5,prob);
660   //  Printf("Tracker RefIndex = %f, chmaber = %i, prob1 = %f, prob2 = %f, prob3 = %f, prob4 = %f, prob5 = %f", nmean,ipCh,prob[0],prob[1],prob[2],prob[3],prob[4]);
661     pTrk->SetHMPIDpid(prob);
662     delete hmpTrk;hmpTrk=0x0;
663   }//iTrk
664
665   return 0; // error code: 0=no error;
666 }//ReconFromKin()
667 //++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
668 Int_t AliHMPIDTracker::ReconHiddenTrk(AliESDEvent *pEsd,TObjArray *pClus,TObjArray *pNmean, TObjArray *pQthre)
669 {
670 // Static method to reconstruct Theta Ckov for all valid tracks of a given event.
671 // Arguments: pEsd- pointer ESD; pClu- pointer to clusters for all chambers; pNmean - pointer to all function Nmean=f(time), pQthre - pointer to all function Qthre=f(time)
672 //   Returns: error code, 0 if no errors
673   
674   AliHMPIDReconHTA reconHTA;                                                                     //instance of reconstruction class, nothing important in ctor
675   
676   AliHMPIDParam *pParam = AliHMPIDParam::Instance();                                             //Instance of AliHMPIDParam
677  
678   Bool_t tsRight = kTRUE;
679  
680   UInt_t tsmin = (UInt_t)((TF1*)pQthre->At(0))->GetXmin();                                        //
681   UInt_t tsmax = (UInt_t)((TF1*)pQthre->At(0))->GetXmax();                                        //
682   UInt_t ts = pEsd->GetTimeStamp();
683
684   if(ts<tsmin || ts>tsmax) {
685     AliWarning(Form(" in HMPID time stamp out of range!!! Please check!!! ts = %i",ts));
686     tsRight = kFALSE;
687   }
688    
689   for(Int_t iTrk=0;iTrk<pEsd->GetNumberOfTracks();iTrk++){                                        //loop on the ESD tracks in the event
690     
691     AliESDtrack *pTrk = pEsd->GetTrack(iTrk);                                                     //here it is simulated or just empty track
692     Int_t ipCh;
693     ipCh = pTrk->GetHMPIDcluIdx();ipCh/=1000000;
694     if(ipCh<0) continue;
695
696     TClonesArray *pMipCluLst=(TClonesArray *)pClus->At(ipCh);                                   //get the list of clusters
697     Int_t nMipClusTot = pMipCluLst->GetEntries();                                               //total number of clusters in the given chamber
698     
699     Double_t qMip=-1;
700     Int_t chMip=-1;    
701     Double_t xMip = 0;
702     Double_t yMip = 0;
703     Int_t indMip  = 0;
704     Int_t cluMipSiz = 0;
705
706     for (Int_t iClu=0; iClu<nMipClusTot;iClu++) {                                               //clusters loop
707       
708       AliHMPIDCluster *pClu=(AliHMPIDCluster*)pMipCluLst->UncheckedAt(iClu);                    //get the cluster
709       Double_t qClus = pClu->Q();
710       if(qClus>qMip) {
711         qMip  = qClus;
712         chMip = pClu->Ch();
713         xMip = pClu->X();
714         yMip = pClu->Y();
715         indMip = iClu;
716         cluMipSiz = pClu->Size();
717       }
718     }//clus loop
719
720     if(chMip<0) return 1;    
721     
722     Int_t hvsec;
723     Double_t qthre=0;
724     
725 // evaluate qThre
726     if(tsRight){
727     if(pQthre->GetEntriesFast()==pParam->kMaxCh+1) {                                              // just for backward compatibility
728       qthre=((TF1*)pQthre->At(chMip))->Eval(ts);                                                  //
729     } else {                                                                                      // in the past just 1 qthre
730       hvsec = pParam->InHVSector(yMip);                                                           //  per chamber
731       if(hvsec>=0) qthre=((TF1*)pQthre->At(6*chMip+hvsec))->Eval(ts);                             //
732     } 
733    } else qthre = pParam->QCut();
734 //
735     if(qMip<qthre) {
736       pTrk->SetHMPIDmip(xMip,yMip,(Int_t)qMip,0);                                                 //store mip info in any case 
737       pTrk->SetHMPIDcluIdx(chMip,indMip+1000*cluMipSiz);                                                          
738       pTrk->SetHMPIDsignal(pParam->kMipQdcCut);
739       return 1;                                                                                   //charge compatible with MIP clusters      
740     }
741       
742     pTrk->SetHMPIDmip(xMip,yMip,(Int_t)qMip,0);                                                   //store mip info in any case 
743     pTrk->SetHMPIDcluIdx(chMip,indMip+1000*cluMipSiz);                                                          
744
745     Double_t yRa = yMip;                                                                        //just an approx...
746     Double_t nmean;
747
748     Int_t iRad     = pParam->Radiator(yRa);                                                   //evaluate the radiator involved
749     
750     //evaluate nMean
751     if(tsRight){
752     if(pNmean->GetEntries()==21) {                                                              //for backward compatibility
753       nmean=((TF1*)pNmean->At(3*chMip))->Eval(ts);                                              //C6F14 Nmean for this chamber
754     } else {
755       if(iRad < 0) {
756         nmean = -1;
757       } else {
758       Double_t tLow  = ((TF1*)pNmean->At(6*chMip+2*iRad  ))->Eval(ts);                          //C6F14 low  temp for this chamber
759       Double_t tHigh = ((TF1*)pNmean->At(6*chMip+2*iRad+1))->Eval(ts);                          //C6F14 high temp for this chamber
760       Double_t tExp  = pParam->FindTemp(tLow,tHigh,yRa);                                        //estimated temp for that chamber at that y
761       nmean = pParam->NIdxRad(AliHMPIDParam::Instance()->GetEPhotMean(),tExp);                  //mean ref idx @ a given temp
762       }
763       if(nmean < 0){                                                                            //track didn' t pass through the radiator
764          pTrk->SetHMPIDsignal(AliHMPIDRecon::kNoRad);                                           //set the appropriate flag
765          return 1;
766         }
767       } 
768     } else nmean = pParam->MeanIdxRad();
769     //
770     if(!reconHTA.CkovHiddenTrk(pTrk,(TClonesArray *)pClus->At(ipCh),indMip,nmean)) {                 //search for track parameters and Cerenkov angle of this track
771       AliHMPIDPid pID;
772       Double_t prob[5];
773       pID.FindPid(pTrk,nmean,5,prob);
774       pTrk->SetHMPIDpid(prob);
775     }
776 //      Printf(" Prob e- %6.2f mu %6.2f pi %6.2f k %6.2f p %6.2f",prob[0]*100,prob[1]*100,prob[2]*100,prob[3]*100,prob[4]*100);
777   }//iTrk
778
779   return 0; // error code: 0=no error;
780
781 }//Recon()
782 //++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
783 void AliHMPIDTracker::FillClusterArray(TObjArray* array) const {
784   
785  // Publishes all pointers to clusters known to the tracker into the
786   // passed object array.
787   // The ownership is not transfered - the caller is not expected to delete
788   // the clusters
789  
790   for(Int_t iCh=AliHMPIDParam::kMinCh;iCh<=AliHMPIDParam::kMaxCh;iCh++){    
791     TClonesArray *pCluArr=(TClonesArray*)(*fClu)[iCh];
792     for (Int_t iClu=0; iClu<pCluArr->GetEntriesFast();iClu++){
793       AliHMPIDCluster *pClu=(AliHMPIDCluster*)pCluArr->UncheckedAt(iClu);    
794       array->AddLast(pClu);
795     }//cluster loop in iCh
796     pCluArr->Delete();
797   }//Ch loop
798     
799   return;
800 }
801 //++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++