#include "AliHMPIDTracker.h" //class header #include "AliHMPIDCluster.h" //GetTrackPoint(),PropagateBack() #include "AliHMPIDParam.h" //GetTrackPoint(),PropagateBack() #include "AliHMPIDRecon.h" //PropagateBack() #include //PropagateBack() #include //GetTrackPoint(),PropagateBack() #include //GetTrackPoint() #include //GetTrackPoint() #include #include ClassImp(AliHMPIDTracker) //++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ Bool_t AliHMPIDTracker::GetTrackPoint(Int_t idx, AliTrackPoint& point) const { // Interface callback methode invoked from AliReconstruction::WriteAlignmentData() to get position of MIP cluster in MARS associated to a current track. // MIP cluster is reffered by index which is stored in AliESDtrack ??????? // Arguments: idx- cluster index which is stored by HMPID in AliESDtrack // point- reference to the object where to store the point // Returns: status of operation if FALSE then AliReconstruction::WriteAlignmentData() do not store this point to array of points for current track. if(idx<0) return kFALSE; //no MIP cluster assigned to this track in PropagateBack() Int_t iCham=idx/1000000; Int_t iClu=idx%1000000; point.SetVolumeID(AliAlignObj::LayerToVolUID(AliAlignObj::kHMPID,iCham-1));//layer and chamber number AliHMPID *pRich=((AliHMPID*)gAlice->GetDetector("HMPID")); AliHMPIDCluster *pClu=(AliHMPIDCluster*)pRich->CluLst(iCham)->UncheckedAt(iClu);//get pointer to cluster Double_t mars[3]; AliHMPIDParam::Instance()->Lors2Mars(iCham,pClu->X(),pClu->Y(),mars); point.SetXYZ(mars[0],mars[1],mars[2]); return kTRUE; } //++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ Int_t AliHMPIDTracker::LoadClusters(TTree *pCluTree) { // Interface callback methode invoked from AliReconstruction::RunTracking() to load HMPID clusters before PropagateBack() gets control // Arguments: pCluTree- pointer to clusters tree got by AliHMPIDLoader::LoadRecPoints("read") then AliHMPIDLoader::TreeR() // Returns: error code (currently ignored in AliReconstruction::RunTraking()) AliDebug(1,"Start."); pCluTree->GetEntry(0); AliDebug(1,"Stop."); return 0; } //++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ Int_t AliHMPIDTracker::PropagateBack(AliESD *pEsd) { // This method defined as pure virtual in AliTracker. It is invoked from AliReconstruction::RunTracking() after invocation of AliTracker::LoadClusters() // Agruments: pEsd - pointer to ESD // Returns: error code AliCDBEntry *pNmeanEnt =AliCDBManager::Instance()->Get("HMPID/Calib/Nmean",pEsd->GetRunNumber()); //contains TObjArray of 21 TF1 AliCDBEntry *pQthreEnt =AliCDBManager::Instance()->Get("HMPID/Calib/Qthre",pEsd->GetRunNumber()); //contains TObjArray of 7 TF1 if(!pNmeanEnt) AliFatal("No Nmean C6F14 "); if(!pQthreEnt) AliFatal("No Qthre"); AliHMPID *pHmpid=((AliHMPID*)gAlice->GetDetector("HMPID")); return Recon(pEsd,pHmpid->CluLst(),(TObjArray*)pNmeanEnt->GetObject()); } //++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ Int_t AliHMPIDTracker::Recon(AliESD *pEsd,TObjArray *pCluAll,TObjArray *pNmean) { // Interface callback methode invoked by AliRecontruction::RunTracking() during tracking after TOF. It's done just once per event // Arguments: pEsd - pointer to Event Summary Data class instance which contains a list of tracks // Returns: error code, 0 if no errors Int_t iNtracks=pEsd->GetNumberOfTracks(); AliDebugClass(1,Form("Start with %i tracks",iNtracks)); AliHMPIDRecon recon; //instance of reconstruction class, nothing important in ctor Float_t xRa,yRa; for(Int_t iTrk=0;iTrkGetTrack(iTrk); //get next reconstructed track Int_t cham=IntTrkCha(pTrk,xRa,yRa); //get chamber intersected by thie track if(cham<0) continue; //no intersection at all, go after next track Double_t nmean=((TF1*)pNmean->At(3*cham))->Eval(pEsd->GetTimeStamp()); //C6F14 Nmean for this chamber recon.CkovAngle(pTrk,(TClonesArray *)pCluAll->At(cham),nmean); //search for Cerenkov angle for this track } //ESD tracks loop AliDebugClass(1,"Stop pattern recognition"); return 0; // error code: 0=no error; }//PropagateBack() //++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ Int_t AliHMPIDTracker::IntTrkCha(AliESDtrack *pTrk,Float_t &xRa,Float_t &yRa) { // Static method to find intersection in between given track and HMPID chambers // Arguments: pTrk - ESD track // xRa,yRa - track intersection with the middle of radiator, LORS // Returns: intersected chamber ID or -1 AliHMPIDParam *pParam=AliHMPIDParam::Instance(); Float_t xPc=0,yPc=0,th=0,ph=0; //track intersection point and angles, LORS for(Int_t i=0;i<7;i++){ //chambers loop Double_t p1[3],n1[3]; pParam->Norm(i,n1); pParam->Lors2Mars(i,0,0,p1,AliHMPIDParam::kRad); //point & norm for RAD Double_t p2[3],n2[3]; pParam->Norm(i,n2); pParam->Lors2Mars(i,0,0,p2,AliHMPIDParam::kPc); //point & norm for PC if(pTrk->Intersect(p1,n1,-GetBz())==kFALSE) continue; //try to intersect track with the middle of radiator if(pTrk->Intersect(p2,n2,-GetBz())==kFALSE) continue; //try to intersect track with PC pParam->Mars2LorsVec(i,n1,th,ph); //track angles pParam->Mars2Lors (i,p1,xRa,yRa); //TRKxRAD position pParam->Mars2Lors (i,p2,xPc,yPc); //TRKxPC position if(AliHMPIDDigit::IsInside(xPc,yPc)==kFALSE) continue; //not in active area pTrk->SetHMPIDtrk (xPc,yPc,th,ph); //store track intersection info pTrk->SetHMPIDcluIdx (i,0); return i; } //chambers loop return -1; //no intersection with HMPID chambers }