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3c6274c1 | 1 | #include "AliHMPIDTracker.h" //class header |
2 | #include "AliHMPIDCluster.h" //GetTrackPoint(),PropagateBack() | |
3 | #include "AliHMPIDParam.h" //GetTrackPoint(),PropagateBack() | |
4 | #include "AliHMPIDRecon.h" //PropagateBack() | |
d3da6dc4 | 5 | #include <AliESD.h> //PropagateBack() |
6 | #include <AliRun.h> //GetTrackPoint(),PropagateBack() | |
7 | #include <AliTrackPointArray.h> //GetTrackPoint() | |
8 | #include <AliAlignObj.h> //GetTrackPoint() | |
9 | ClassImp(AliHMPIDTracker) | |
d3da6dc4 | 10 | //++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ |
11 | Bool_t AliHMPIDTracker::GetTrackPoint(Int_t idx, AliTrackPoint& point) const | |
12 | { | |
13 | // Interface callback methode invoked from AliReconstruction::WriteAlignmentData() to get position of MIP cluster in MARS associated to a current track. | |
14 | // MIP cluster is reffered by index which is stored in AliESDtrack ??????? | |
15 | // Arguments: idx- cluster index which is stored by HMPID in AliESDtrack | |
16 | // point- reference to the object where to store the point | |
17 | // Returns: status of operation if FALSE then AliReconstruction::WriteAlignmentData() do not store this point to array of points for current track. | |
18 | if(idx<0) return kFALSE; //no MIP cluster assigned to this track in PropagateBack() | |
19 | Int_t iCham=idx/1000000; | |
20 | Int_t iClu=idx%1000000; | |
21 | point.SetVolumeID(AliAlignObj::LayerToVolUID(AliAlignObj::kHMPID,iCham-1));//layer and chamber number | |
22 | AliHMPID *pRich=((AliHMPID*)gAlice->GetDetector("HMPID")); | |
23 | AliHMPIDCluster *pClu=(AliHMPIDCluster*)pRich->CluLst(iCham)->UncheckedAt(iClu);//get pointer to cluster | |
24 | Double_t mars[3]; | |
25 | AliHMPIDParam::Instance()->Lors2Mars(iCham,pClu->X(),pClu->Y(),mars); | |
26 | point.SetXYZ(mars[0],mars[1],mars[2]); | |
27 | return kTRUE; | |
28 | } | |
29 | //++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ | |
30 | Int_t AliHMPIDTracker::LoadClusters(TTree *pCluTree) | |
31 | { | |
32 | // Interface callback methode invoked from AliReconstruction::RunTracking() to load HMPID clusters before PropagateBack() gets control | |
33 | // Arguments: pCluTree- pointer to clusters tree got by AliHMPIDLoader::LoadRecPoints("read") then AliHMPIDLoader::TreeR() | |
34 | // Returns: error code (currently ignored in AliReconstruction::RunTraking()) | |
35 | AliDebug(1,"Start."); pCluTree->GetEntry(0); AliDebug(1,"Stop."); return 0; | |
36 | } | |
37 | //++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ | |
3c6274c1 | 38 | Int_t AliHMPIDTracker::Recon(AliESD *pESD,TObjArray *pCluAll) |
d3da6dc4 | 39 | { |
40 | // Interface callback methode invoked by AliRecontruction::RunTracking() during tracking after TOF. It's done just once per event | |
41 | // Arguments: pESD - pointer to Event Summary Data class instance which contains a list of tracks | |
42 | // Returns: error code, 0 if no errors | |
3c6274c1 | 43 | Int_t iNtracks=pESD->GetNumberOfTracks(); AliDebugClass(1,Form("Start with %i tracks",iNtracks)); |
d3da6dc4 | 44 | AliHMPIDRecon recon; //instance of reconstruction class, nothing important in ctor |
45 | ||
46 | AliHMPIDParam *pParam=AliHMPIDParam::Instance(); | |
47 | ||
48 | for(Int_t iTrk=0;iTrk<iNtracks;iTrk++){ //ESD tracks loop | |
49 | AliESDtrack *pTrk = pESD->GetTrack(iTrk); //get next reconstructed track | |
50 | ||
51 | Float_t xRa=0,yRa=0,xPc=0,yPc=0,th=0,ph=0; //track intersection point and angles, LORS | |
52 | Int_t iCh=-1; //intersected chamber | |
53 | for(Int_t i=0;i<7;i++){ //chambers loop | |
54 | Double_t p1[3],n1[3]; pParam->Norm(i,n1); pParam->Lors2Mars(i,0,0,p1,AliHMPIDParam::kRad); //point & norm for RAD | |
55 | Double_t p2[3],n2[3]; pParam->Norm(i,n2); pParam->Lors2Mars(i,0,0,p2,AliHMPIDParam::kPc); //point & norm for PC | |
56 | ||
57 | if(pTrk->Intersect(p1,n1,-GetBz())==kFALSE) continue; //try to intersect track with the middle of radiator | |
58 | if(pTrk->Intersect(p2,n2,-GetBz())==kFALSE) continue; //try to intersect track with PC | |
59 | ||
60 | pParam->Mars2LorsVec(i,n1,th,ph); //track angles | |
61 | pParam->Mars2Lors (i,p1,xRa,yRa); //TRKxRAD position | |
62 | pParam->Mars2Lors (i,p2,xPc,yPc); //TRKxPC position | |
63 | ||
64 | if(AliHMPIDDigit::IsInside(xPc,yPc)==kFALSE) continue; //not in active area | |
65 | iCh=i; | |
66 | break; | |
67 | }//chambers loop | |
68 | ||
69 | if(iCh==-1) continue; //no intersection at all, go after next track | |
70 | ||
3c6274c1 | 71 | TClonesArray *pCluLst=(TClonesArray *)pCluAll->At(iCh); //get clusters list for intersected chamber |
d3da6dc4 | 72 | |
73 | Double_t dMin=999; //distance between track-PC intersection point and current cluster | |
74 | Int_t iMip=-1; //index of cluster nearest to intersection point | |
75 | for(Int_t iClu=0;iClu<pCluLst->GetEntries();iClu++){ //clusters loop for intersected chamber | |
76 | AliHMPIDCluster *pClu=(AliHMPIDCluster*)pCluLst->At(iClu); //get pointer to current cluster | |
77 | if(pClu->Q()<100) continue; //QDC is incompartible with mip, go after another one | |
78 | ||
79 | Float_t dX=xPc-pClu->X(); //distance between current cluster and intersection point | |
80 | Float_t dY=yPc-pClu->Y(); | |
81 | Float_t d =TMath::Sqrt(dX*dX+dY*dY); | |
82 | ||
83 | if( d < dMin) {iMip=iClu; dMin=d;} //current cluster is closer, overwrite data for min cluster | |
84 | }//clusters loop for intersected chamber | |
85 | ||
86 | pTrk->SetHMPIDtrk (xPc,yPc,th,ph); //store track info | |
87 | if(iMip==-1) {pTrk->SetHMPIDsignal (kMipQdcCut); continue;} //no clusters with QDC more the threshold at all | |
88 | ||
89 | AliHMPIDCluster *pMipClu=(AliHMPIDCluster*)pCluLst->At(iMip); //take mip cluster | |
90 | ||
91 | pTrk->SetHMPIDmip (pMipClu->X(),pMipClu->Y(),pMipClu->Q()); //store mip info | |
92 | if(dMin>1) {pTrk->SetHMPIDsignal (kMipDistCut); continue;} //closest cluster with enough charge is still too far | |
93 | pTrk->SetHMPIDcluIdx (iCh,iMip); //set mip cluster index | |
94 | recon.SetTrack(th,ph,xRa,yRa); Int_t iNphot=0; //initialize track parameters | |
95 | pTrk->SetHMPIDsignal (recon.CkovAngle(pCluLst,iNphot)); //search for Cerenkov angle for this track | |
96 | pTrk->SetHMPIDchi2 (recon.CkovSigma2()); //error squared | |
97 | pTrk->SetHMPIDmip (pMipClu->X(),pMipClu->Y(),pMipClu->Q(),iMip); //info on mip cluster + n. phot. | |
d3da6dc4 | 98 | }//ESD tracks loop |
3c6274c1 | 99 | AliDebugClass(1,"Stop pattern recognition"); |
d3da6dc4 | 100 | return 0; // error code: 0=no error; |
101 | }//PropagateBack() | |
102 | //++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ |