#include "AliHMPIDTracker.h" //class header #include "AliHMPIDCluster.h" //GetTrackPoint(),PropagateBack() #include "AliHMPIDParam.h" //GetTrackPoint(),PropagateBack() #include "AliHMPIDRecon.h" //Recon() #include //PropagateBack(),Recon() #include //Intersect() #include //GetTrackPoint(),PropagateBack() #include //GetTrackPoint() #include //GetTrackPoint() #include //PropageteBack() #include //PropageteBack() //. // HMPID base class fo tracking //. //. //. ClassImp(AliHMPIDTracker) //++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ AliHMPIDTracker::AliHMPIDTracker():AliTracker() { // ctor. Create TObjArray of TClonesArray of AliHMPIDCluster // // fClu=new TObjArray(AliHMPIDParam::kMaxCh+1); fClu->SetOwner(kTRUE); for(int i=AliHMPIDParam::kMinCh;i<=AliHMPIDParam::kMaxCh;i++) fClu->AddAt(new TClonesArray("AliHMPIDCluster"),i); }//ctor //++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ 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(AliGeomManager::LayerToVolUID(AliGeomManager::kHMPID,iCham-1));//layer and chamber number TClonesArray *pArr=(TClonesArray*)(*fClu)[iCham]; AliHMPIDCluster *pClu=(AliHMPIDCluster*)pArr->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; }//GetTrackPoint() //++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ Int_t AliHMPIDTracker::IntTrkCha(AliESDtrack *pTrk,Float_t &xPc,Float_t &yPc) { // Static method to find intersection in between given track and HMPID chambers // Arguments: pTrk- ESD track; xPc,yPc- track intersection with PC in LORS [cm] // Returns: intersected chamber ID or -1 AliHMPIDParam *pParam=AliHMPIDParam::Instance(); Float_t xRa=0,yRa=0,theta=0,phi=0; //track intersection at PC and angles at RAD, LORS for(Int_t i=AliHMPIDParam::kMinCh;i<=AliHMPIDParam::kMaxCh;i++){ //chambers loop Double_t p1[3],n1[3]; pParam->Norm(i,n1); pParam->Point(i,p1,AliHMPIDParam::kRad); //point & norm for middle of radiator plane Double_t p2[3],n2[3]; pParam->Norm(i,n2); pParam->Point(i,p2,AliHMPIDParam::kPc); //point & norm for entrance to PC plane 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,theta,phi); //track angles at RAD pParam->Mars2Lors (i,p1,xRa,yRa); //TRKxRAD position pParam->Mars2Lors (i,p2,xPc,yPc); //TRKxPC position if(AliHMPIDParam::IsInside(xPc,yPc,pParam->DistCut())==kFALSE) continue; //not in active area pTrk->SetHMPIDtrk (xRa,yRa,theta,phi); //store track intersection info pTrk->SetHMPIDcluIdx (i,0); return i; } //chambers loop return -1; //no intersection with HMPID chambers }//IntTrkCha() //++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ Int_t AliHMPIDTracker::LoadClusters(TTree *pCluTree) { // Interface callback methode invoked from AliReconstruction::RunTracking() to load HMPID clusters before PropagateBack() gets control. Done once per event. // Arguments: pCluTree- pointer to clusters tree got by AliHMPIDLoader::LoadRecPoints("read") then AliHMPIDLoader::TreeR() // Returns: error code (currently ignored in AliReconstruction::RunTraking()) for(int i=AliHMPIDParam::kMinCh;i<=AliHMPIDParam::kMaxCh;i++) pCluTree->SetBranchAddress(Form("HMPID%d",i),&((*fClu)[i])); pCluTree->GetEntry(0); return 0; }//LoadClusters() //++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ Int_t AliHMPIDTracker::PropagateBack(AliESDEvent *pEsd) { // Interface pure virtual in AliTracker. Invoked from AliReconstruction::RunTracking() after invocation of AliTracker::LoadClusters() once per event // Agruments: pEsd - pointer to ESD // Returns: error code AliCDBEntry *pNmeanEnt =AliCDBManager::Instance()->Get("HMPID/Calib/Nmean"); //contains TObjArray of 21 TF1 AliCDBEntry *pQthreEnt =AliCDBManager::Instance()->Get("HMPID/Calib/Qthre"); //contains TObjArray of 7 TF1 if(!pNmeanEnt) AliFatal("No Nmean C6F14 "); if(!pQthreEnt) AliFatal("No Qthre"); return Recon(pEsd,fClu,(TObjArray*)pNmeanEnt->GetObject(),(TObjArray*)pQthreEnt->GetObject()); }//PropagateBack() //++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ Int_t AliHMPIDTracker::Recon(AliESDEvent *pEsd,TObjArray *pClus,TObjArray *pNmean, TObjArray *pQthre) { // Static method to reconstruct Theta Ckov for all valid tracks of a given event. // Arguments: pEsd- pointer ESD; pClu- pointer to clusters for all chambers; pNmean - pointer to all function Nmean=f(time) // Returns: error code, 0 if no errors AliHMPIDRecon recon; //instance of reconstruction class, nothing important in ctor Float_t xPc,yPc; for(Int_t iTrk=0;iTrkGetNumberOfTracks();iTrk++){ //ESD tracks loop AliESDtrack *pTrk = pEsd->GetTrack(iTrk); //get reconstructed track Int_t cham=IntTrkCha(pTrk,xPc,yPc); //get chamber intersected by this 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 Double_t qthre=((TF1*)pQthre->At(cham)) ->Eval(pEsd->GetTimeStamp()); //Qthre for this chamber recon.SetImpPC(xPc,yPc); //store track impact to PC recon.CkovAngle(pTrk,(TClonesArray *)pClus->At(cham),nmean,qthre); //search for Cerenkov angle of this track // Printf("AliHMPIDTracker::Recon: nmean %f, qthre %f",nmean,qthre); } //ESD tracks loop return 0; // error code: 0=no error; }//Recon() //++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ Int_t AliHMPIDTracker::ReconHiddenTrk(Int_t iCh,AliESDtrack *pTrk,TClonesArray *pCluLst,TObjArray *pNmean,TObjArray *pQthre) { // Static method to reconstruct Theta Ckov for all valid tracks of a given event. // 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) // Returns: error code, 0 if no errors AliHMPIDRecon recon; //instance of reconstruction class, nothing important in ctor Double_t nmean=((TF1*)pNmean->At(3*iCh))->Eval(0); //C6F14 Nmean for this chamber Double_t qthre=((TF1*)pQthre->At(iCh)) ->Eval(0); //C6F14 Nmean for this chamber if(pCluLst->GetEntriesFast()<4) return 1; //min 4 clusters (3 + 1 mip) to find a ring! if(recon.CkovHiddenTrk(pTrk,pCluLst,nmean,qthre)) return 0; //search for track parameters and Cerenkov angle of this track else return 1; // error code: 0=no error,1=fit not performed; }//Recon() //++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++