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1 | #include "AliHMPIDTracker.h" //class header | |
2 | #include "AliHMPIDCluster.h" //GetTrackPoint(),PropagateBack() | |
3 | #include "AliHMPIDParam.h" //GetTrackPoint(),PropagateBack() | |
4 | #include "AliHMPIDRecon.h" //Recon() | |
5 | #include <AliESDEvent.h> //PropagateBack(),Recon() | |
6 | #include <AliESDtrack.h> //Intersect() | |
7 | #include <AliRun.h> //GetTrackPoint(),PropagateBack() | |
8 | #include <AliTrackPointArray.h> //GetTrackPoint() | |
9 | #include <AliAlignObj.h> //GetTrackPoint() | |
10 | #include <AliCDBManager.h> //PropageteBack() | |
11 | #include <AliCDBEntry.h> //PropageteBack() | |
12 | //. | |
13 | // HMPID base class fo tracking | |
14 | //. | |
15 | //. | |
16 | //. | |
17 | ClassImp(AliHMPIDTracker) | |
18 | //++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ | |
19 | AliHMPIDTracker::AliHMPIDTracker():AliTracker() | |
20 | { | |
21 | // ctor. Create TObjArray of TClonesArray of AliHMPIDCluster | |
22 | // | |
23 | // | |
24 | fClu=new TObjArray(AliHMPIDParam::kMaxCh+1); fClu->SetOwner(kTRUE); | |
25 | for(int i=AliHMPIDParam::kMinCh;i<=AliHMPIDParam::kMaxCh;i++) fClu->AddAt(new TClonesArray("AliHMPIDCluster"),i); | |
26 | }//ctor | |
27 | //++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ | |
28 | Bool_t AliHMPIDTracker::GetTrackPoint(Int_t idx, AliTrackPoint& point) const | |
29 | { | |
30 | // Interface callback methode invoked from AliReconstruction::WriteAlignmentData() to get position of MIP cluster in MARS associated to a current track. | |
31 | // MIP cluster is reffered by index which is stored in AliESDtrack ??????? | |
32 | // Arguments: idx- cluster index which is stored by HMPID in AliESDtrack | |
33 | // point- reference to the object where to store the point | |
34 | // Returns: status of operation if FALSE then AliReconstruction::WriteAlignmentData() do not store this point to array of points for current track. | |
35 | if(idx<0) return kFALSE; //no MIP cluster assigned to this track in PropagateBack() | |
36 | Int_t iCham=idx/1000000; Int_t iClu=idx%1000000; | |
37 | point.SetVolumeID(AliGeomManager::LayerToVolUID(AliGeomManager::kHMPID,iCham-1));//layer and chamber number | |
38 | TClonesArray *pArr=(TClonesArray*)(*fClu)[iCham]; | |
39 | AliHMPIDCluster *pClu=(AliHMPIDCluster*)pArr->UncheckedAt(iClu);//get pointer to cluster | |
40 | Double_t mars[3]; | |
41 | AliHMPIDParam::Instance()->Lors2Mars(iCham,pClu->X(),pClu->Y(),mars); | |
42 | point.SetXYZ(mars[0],mars[1],mars[2]); | |
43 | return kTRUE; | |
44 | }//GetTrackPoint() | |
45 | //++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ | |
46 | Int_t AliHMPIDTracker::IntTrkCha(AliESDtrack *pTrk,Float_t &xPc,Float_t &yPc) | |
47 | { | |
48 | // Static method to find intersection in between given track and HMPID chambers | |
49 | // Arguments: pTrk- ESD track; xPc,yPc- track intersection with PC in LORS [cm] | |
50 | // Returns: intersected chamber ID or -1 | |
51 | AliHMPIDParam *pParam=AliHMPIDParam::Instance(); | |
52 | Float_t xRa=0,yRa=0,theta=0,phi=0; //track intersection at PC and angles at RAD, LORS | |
53 | for(Int_t i=AliHMPIDParam::kMinCh;i<=AliHMPIDParam::kMaxCh;i++){ //chambers loop | |
54 | Double_t p1[3],n1[3]; pParam->Norm(i,n1); pParam->Point(i,p1,AliHMPIDParam::kRad); //point & norm for middle of radiator plane | |
55 | Double_t p2[3],n2[3]; pParam->Norm(i,n2); pParam->Point(i,p2,AliHMPIDParam::kPc); //point & norm for entrance to PC plane | |
56 | if(pTrk->Intersect(p1,n1,-GetBz())==kFALSE) continue; //try to intersect track with the middle of radiator | |
57 | if(pTrk->Intersect(p2,n2,-GetBz())==kFALSE) continue; //try to intersect track with PC | |
58 | pParam->Mars2LorsVec(i,n1,theta,phi); //track angles at RAD | |
59 | pParam->Mars2Lors (i,p1,xRa,yRa); //TRKxRAD position | |
60 | pParam->Mars2Lors (i,p2,xPc,yPc); //TRKxPC position | |
61 | if(AliHMPIDParam::IsInside(xPc,yPc,pParam->DistCut())==kFALSE) continue; //not in active area | |
62 | pTrk->SetHMPIDtrk (xRa,yRa,theta,phi); //store track intersection info | |
63 | pTrk->SetHMPIDcluIdx (i,0); | |
64 | return i; | |
65 | } //chambers loop | |
66 | return -1; //no intersection with HMPID chambers | |
67 | }//IntTrkCha() | |
68 | //++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ | |
69 | Int_t AliHMPIDTracker::LoadClusters(TTree *pCluTree) | |
70 | { | |
71 | // Interface callback methode invoked from AliReconstruction::RunTracking() to load HMPID clusters before PropagateBack() gets control. Done once per event. | |
72 | // Arguments: pCluTree- pointer to clusters tree got by AliHMPIDLoader::LoadRecPoints("read") then AliHMPIDLoader::TreeR() | |
73 | // Returns: error code (currently ignored in AliReconstruction::RunTraking()) | |
74 | for(int i=AliHMPIDParam::kMinCh;i<=AliHMPIDParam::kMaxCh;i++) pCluTree->SetBranchAddress(Form("HMPID%d",i),&((*fClu)[i])); | |
75 | pCluTree->GetEntry(0); | |
76 | return 0; | |
77 | }//LoadClusters() | |
78 | //++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ | |
79 | Int_t AliHMPIDTracker::PropagateBack(AliESDEvent *pEsd) | |
80 | { | |
81 | // Interface pure virtual in AliTracker. Invoked from AliReconstruction::RunTracking() after invocation of AliTracker::LoadClusters() once per event | |
82 | // Agruments: pEsd - pointer to ESD | |
83 | // Returns: error code | |
84 | AliCDBEntry *pNmeanEnt =AliCDBManager::Instance()->Get("HMPID/Calib/Nmean"); //contains TObjArray of 21 TF1 | |
85 | AliCDBEntry *pQthreEnt =AliCDBManager::Instance()->Get("HMPID/Calib/Qthre"); //contains TObjArray of 7 TF1 | |
86 | if(!pNmeanEnt) AliFatal("No Nmean C6F14 "); | |
87 | if(!pQthreEnt) AliFatal("No Qthre"); | |
88 | ||
89 | return Recon(pEsd,fClu,(TObjArray*)pNmeanEnt->GetObject(),(TObjArray*)pQthreEnt->GetObject()); | |
90 | }//PropagateBack() | |
91 | //++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ | |
92 | Int_t AliHMPIDTracker::Recon(AliESDEvent *pEsd,TObjArray *pClus,TObjArray *pNmean, TObjArray *pQthre) | |
93 | { | |
94 | // Static method to reconstruct Theta Ckov for all valid tracks of a given event. | |
95 | // Arguments: pEsd- pointer ESD; pClu- pointer to clusters for all chambers; pNmean - pointer to all function Nmean=f(time) | |
96 | // Returns: error code, 0 if no errors | |
97 | AliHMPIDRecon recon; //instance of reconstruction class, nothing important in ctor | |
98 | Float_t xPc,yPc; | |
99 | for(Int_t iTrk=0;iTrk<pEsd->GetNumberOfTracks();iTrk++){ //ESD tracks loop | |
100 | AliESDtrack *pTrk = pEsd->GetTrack(iTrk); //get reconstructed track | |
101 | Int_t cham=IntTrkCha(pTrk,xPc,yPc); //get chamber intersected by this track | |
102 | if(cham<0) continue; //no intersection at all, go after next track | |
103 | Double_t nmean=((TF1*)pNmean->At(3*cham))->Eval(pEsd->GetTimeStamp()); //C6F14 Nmean for this chamber | |
104 | Double_t qthre=((TF1*)pQthre->At(cham)) ->Eval(pEsd->GetTimeStamp()); //Qthre for this chamber | |
105 | recon.SetImpPC(xPc,yPc); //store track impact to PC | |
106 | recon.CkovAngle(pTrk,(TClonesArray *)pClus->At(cham),nmean,qthre); //search for Cerenkov angle of this track | |
107 | // Printf("AliHMPIDTracker::Recon: nmean %f, qthre %f",nmean,qthre); | |
108 | } //ESD tracks loop | |
109 | return 0; // error code: 0=no error; | |
110 | }//Recon() | |
111 | //++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ | |
112 | Int_t AliHMPIDTracker::ReconHiddenTrk(Int_t iCh,AliESDtrack *pTrk,TClonesArray *pCluLst,TObjArray *pNmean,TObjArray *pQthre) | |
113 | { | |
114 | // Static method to reconstruct Theta Ckov for all valid tracks of a given event. | |
115 | // 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) | |
116 | // Returns: error code, 0 if no errors | |
117 | AliHMPIDRecon recon; //instance of reconstruction class, nothing important in ctor | |
118 | Double_t nmean=((TF1*)pNmean->At(3*iCh))->Eval(0); //C6F14 Nmean for this chamber | |
119 | Double_t qthre=((TF1*)pQthre->At(iCh)) ->Eval(0); //C6F14 Nmean for this chamber | |
120 | if(pCluLst->GetEntriesFast()<4) return 1; //min 4 clusters (3 + 1 mip) to find a ring! | |
121 | if(recon.CkovHiddenTrk(pTrk,pCluLst,nmean,qthre)) return 0; //search for track parameters and Cerenkov angle of this track | |
122 | else return 1; // error code: 0=no error,1=fit not performed; | |
123 | }//Recon() | |
124 | //++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ |