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db910db9 | 1 | #include "AliRICHTracker.h" //class header |
a446c3c3 | 2 | #include "AliRICH.h" //GetTrackPoint(),PropagateBack() |
3 | #include "AliRICHCluster.h" //GetTrackPoint(),PropagateBack() | |
4 | #include "AliRICHParam.h" //GetTrackPoint(),PropagateBack() | |
5 | #include "AliRICHRecon.h" //PropagateBack() | |
6 | #include <AliESD.h> //PropagateBack() | |
7 | #include <AliRun.h> //GetTrackPoint(),PropagateBack() | |
db910db9 | 8 | #include <AliTrackPointArray.h> //GetTrackPoint() |
9 | #include <AliAlignObj.h> //GetTrackPoint() | |
998b831f | 10 | ClassImp(AliRICHTracker) |
db910db9 | 11 | //++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ |
12 | AliRICHTracker::AliRICHTracker():AliTracker() | |
998b831f | 13 | { |
db910db9 | 14 | // AliRICHTracker is created from AliReconstraction::Run() which invokes AliReconstraction::CreateTrackers() |
15 | // which in turn invokes AliRICHReconstructor::CreateTracker(). | |
16 | // Note that this is done just once per session before AliReconstruction::Run() goes to events loop. | |
db910db9 | 17 | } |
18 | //++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ | |
19 | Bool_t AliRICHTracker::GetTrackPoint(Int_t idx, AliTrackPoint& point) const | |
30c60010 | 20 | { |
db910db9 | 21 | // Interface callback methode invoked from AliReconstruction::WriteAlignmentData() to get position of MIP cluster in MARS associated to a current track. |
22 | // MIP cluster is reffered by index which is stored in AliESDtrack ??????? | |
23 | // Arguments: idx- cluster index which is stored by RICH in AliESDtrack | |
24 | // point- reference to the object where to store the point | |
25 | // Returns: status of operation if FALSE then AliReconstruction::WriteAlignmentData() do not store this point to array of points for current track. | |
26 | if(idx<0) return kFALSE; //no MIP cluster assigned to this track in PropagateBack() | |
27 | Int_t iCham=idx/1000000; | |
28 | Int_t iClu=idx%1000000; | |
29 | point.SetVolumeID(AliAlignObj::LayerToVolUID(AliAlignObj::kRICH,iCham-1));//layer and chamber number | |
30 | AliRICH *pRich=((AliRICH*)gAlice->GetDetector("RICH")); | |
e30ca504 | 31 | AliRICHCluster *pClu=(AliRICHCluster*)pRich->CluLst(iCham)->UncheckedAt(iClu);//get pointer to cluster |
a446c3c3 | 32 | Double_t mars[3]; |
33 | AliRICHParam::Instance()->Lors2Mars(iCham,pClu->X(),pClu->Y(),mars); | |
34 | point.SetXYZ(mars[0],mars[1],mars[2]); | |
db910db9 | 35 | return kTRUE; |
36 | } | |
37 | //++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ | |
38 | Int_t AliRICHTracker::LoadClusters(TTree *pCluTree) | |
39 | { | |
e30ca504 | 40 | // Interface callback methode invoked from AliReconstruction::RunTracking() to load RICH clusters before PropagateBack() gets control |
db910db9 | 41 | // Arguments: pCluTree- pointer to clusters tree got by AliRICHLoader::LoadRecPoints("read") then AliRICHLoader::TreeR() |
42 | // Returns: error code (currently ignored in AliReconstruction::RunTraking()) | |
43 | AliDebug(1,"Start."); pCluTree->GetEntry(0); AliDebug(1,"Stop."); return 0; | |
44 | } | |
45 | //++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ | |
46 | Int_t AliRICHTracker::PropagateBack(AliESD *pESD) | |
47 | { | |
48 | // Interface callback methode invoked by AliRecontruction::RunTracking() during tracking after TOF. It's done just once per event | |
49 | // Arguments: pESD - pointer to Event Summary Data class instance which contains a list of tracks | |
50 | // Returns: error code, 0 if no errors | |
9a221675 | 51 | Int_t iNtracks=pESD->GetNumberOfTracks(); AliDebug(1,Form("Start with %i tracks",iNtracks)); |
db910db9 | 52 | AliRICH *pRich=((AliRICH*)gAlice->GetDetector("RICH")); |
e30ca504 | 53 | AliRICHRecon recon; //instance of reconstruction class, nothing important in ctor |
db910db9 | 54 | |
e30ca504 | 55 | AliRICHParam *pParam=AliRICHParam::Instance(); |
01c81d9d | 56 | |
e30ca504 | 57 | for(Int_t iTrk=0;iTrk<iNtracks;iTrk++){ //ESD tracks loop |
58 | AliESDtrack *pTrk = pESD->GetTrack(iTrk); //get next reconstructed track | |
59 | ||
60 | Float_t xRa=0,yRa=0,xPc=0,yPc=0,th=0,ph=0; //track intersection point and angles, LORS | |
61 | Int_t iCh=-1; //intersected chamber | |
62 | for(Int_t i=0;i<7;i++){ //chambers loop | |
63 | Double_t p1[3],n1[3]; pParam->Norm(i,n1); pParam->Lors2Mars(i,0,0,p1,AliRICHParam::kRad); //point & norm for RAD | |
64 | Double_t p2[3],n2[3]; pParam->Norm(i,n2); pParam->Lors2Mars(i,0,0,p2,AliRICHParam::kPc); //point & norm for PC | |
65 | ||
66 | if(pTrk->Intersect(p1,n1,-GetBz())==kFALSE) continue; //try to intersect track with the middle of radiator | |
67 | if(pTrk->Intersect(p2,n2,-GetBz())==kFALSE) continue; //try to intersect track with PC | |
68 | ||
69 | pParam->Mars2LorsVec(i,n1,th,ph); //track angles | |
70 | pParam->Mars2Lors (i,p1,xRa,yRa); //TRKxRAD position | |
71 | pParam->Mars2Lors (i,p2,xPc,yPc); //TRKxPC position | |
30c60010 | 72 | |
e30ca504 | 73 | if(AliRICHDigit::IsInside(xPc,yPc)==kFALSE) continue; //not in active area |
74 | iCh=i; | |
75 | break; | |
76 | }//chambers loop | |
30c60010 | 77 | |
e30ca504 | 78 | if(iCh==-1) continue; //no intersection at all, go after next track |
db910db9 | 79 | |
e30ca504 | 80 | TClonesArray *pCluLst=pRich->CluLst(iCh); //get clusters list for intersected chamber |
2a92c3fe | 81 | |
e30ca504 | 82 | Double_t dMin=999; //distance between track-PC intersection point and current cluster |
83 | Int_t iMip=-1; //index of cluster nearest to intersection point | |
84 | for(Int_t iClu=0;iClu<pCluLst->GetEntries();iClu++){ //clusters loop for intersected chamber | |
85 | AliRICHCluster *pClu=(AliRICHCluster*)pCluLst->At(iClu); //get pointer to current cluster | |
86 | if(pClu->Q()<100) continue; //QDC is incompartible with mip, go after another one | |
9a221675 | 87 | |
a446c3c3 | 88 | Float_t dX=xPc-pClu->X(); //distance between current cluster and intersection point |
e30ca504 | 89 | Float_t dY=yPc-pClu->Y(); |
90 | Float_t d =TMath::Sqrt(dX*dX+dY*dY); | |
9a221675 | 91 | |
e30ca504 | 92 | if( d < dMin) {iMip=iClu; dMin=d;} //current cluster is closer, overwrite data for min cluster |
93 | }//clusters loop for intersected chamber | |
84093f6f | 94 | |
a446c3c3 | 95 | pTrk->SetRICHtrk (xPc,yPc,th,ph); //store track info |
96 | if(iMip==-1) {pTrk->SetRICHsignal (kMipQdcCut); continue;} //no clusters with QDC more the threshold at all | |
84093f6f | 97 | |
a446c3c3 | 98 | AliRICHCluster *pMipClu=(AliRICHCluster*)pCluLst->At(iMip); //take mip cluster |
2a92c3fe | 99 | |
a446c3c3 | 100 | pTrk->SetRICHmip (pMipClu->X(),pMipClu->Y(),pMipClu->Q()); //store mip info |
101 | if(dMin>1) {pTrk->SetRICHsignal (kMipDistCut); continue;} //closest cluster with enough charge is still too far | |
102 | pTrk->SetRICHcluIdx (iCh,iMip); //set mip cluster index | |
103 | recon.SetTrack(th,ph,xRa,yRa); Int_t iNphot=0; //initialize track parameters | |
104 | pTrk->SetRICHsignal (recon.CkovAngle(pCluLst,iNphot)); //search for Cerenkov angle for this track | |
105 | pTrk->SetRICHchi2 (recon.CkovSigma2()); //error squared | |
106 | pTrk->SetRICHmip (pMipClu->X(),pMipClu->Y(),pMipClu->Q(),iMip); //info on mip cluster + n. phot. | |
e30ca504 | 107 | Printf("Ch=%i MIP-TRK=%5.2f cm Th=%f+-%f", iCh, dMin,pTrk->GetRICHsignal(),pTrk->GetRICHchi2()); |
108 | }//ESD tracks loop | |
109 | AliDebug(1,"Stop pattern recognition"); | |
110 | return 0; // error code: 0=no error; | |
111 | }//PropagateBack() | |
db910db9 | 112 | //++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ |