[u/mrichter/AliRoot.git] / HMPID / AliHMPIDTracker.cxx

#include "AliHMPIDTracker.h"     //class header
#include "AliHMPIDCluster.h"     //GetTrackPoint(),PropagateBack() 
#include "AliHMPIDParam.h"       //GetTrackPoint(),PropagateBack()
#include "AliHMPIDRecon.h"       //PropagateBack()
#include <AliESD.h>              //PropagateBack()  
#include <AliRun.h>              //GetTrackPoint(),PropagateBack()  
#include <AliTrackPointArray.h>  //GetTrackPoint()
#include <AliAlignObj.h>         //GetTrackPoint()
#include <AliCDBManager.h>
#include <AliCDBEntry.h>

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 method 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
  Double_t xPc,yPc;
  for(Int_t iTrk=0;iTrk<iNtracks;iTrk++){                                                        //ESD tracks loop
    AliESDtrack *pTrk = pEsd->GetTrack(iTrk);                                                    //get next 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
    recon.SetImpPC(xPc,yPc);                                                                     //store track impact to PC
    recon.CkovAngle(pTrk,(TClonesArray *)pCluAll->At(cham),nmean);                               //search for Cerenkov angle of this track
  }                                                                                              //ESD tracks loop
  AliDebugClass(1,"Stop pattern recognition");
  return 0; // error code: 0=no error;
}//PropagateBack()
//++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
Int_t AliHMPIDTracker::IntTrkCha(AliESDtrack *pTrk,Double_t &xToPc,Double_t &yToPc)
{
// Static method to find intersection in between given track and HMPID chambers
// Arguments: pTrk    - ESD track 
//            xPc,yPc - track intersection with PC, LORS
//   Returns: intersected chamber ID or -1
  
  AliHMPIDParam *pParam=AliHMPIDParam::Instance();
  Float_t xRa=0,yRa=0,xPc=0,yPc=0,theta=0,phi=0;                                                //track intersection point and angles, LORS  
  for(Int_t i=AliHMPIDDigit::kMinCh;i<=AliHMPIDDigit::kMaxCh;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,theta,phi);                                                       //track angles at RAD
    pParam->Mars2Lors   (i,p1,xRa,yRa);                                                         //TRKxRAD position
    pParam->Mars2Lors   (i,p2,xPc,yPc);                                                         //TRKxPC position
    xToPc=(Double_t)xPc;yToPc=(Double_t)yPc;                                                    //conversion float->double only
    if(AliHMPIDDigit::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
}
Commit	Line	Data
	1	#include "AliHMPIDTracker.h" //class header
	2	#include "AliHMPIDCluster.h" //GetTrackPoint(),PropagateBack()
	3	#include "AliHMPIDParam.h" //GetTrackPoint(),PropagateBack()
	4	#include "AliHMPIDRecon.h" //PropagateBack()
	5	#include <AliESD.h> //PropagateBack()
	6	#include <AliRun.h> //GetTrackPoint(),PropagateBack()
	7	#include <AliTrackPointArray.h> //GetTrackPoint()
	8	#include <AliAlignObj.h> //GetTrackPoint()
	9	#include <AliCDBManager.h>
	10	#include <AliCDBEntry.h>
	11
	12	ClassImp(AliHMPIDTracker)
	13
	14	//++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
	15	Bool_t AliHMPIDTracker::GetTrackPoint(Int_t idx, AliTrackPoint& point) const
	16	{
	17	// Interface callback methode invoked from AliReconstruction::WriteAlignmentData() to get position of MIP cluster in MARS associated to a current track.
	18	// MIP cluster is reffered by index which is stored in AliESDtrack ???????
	19	// Arguments: idx- cluster index which is stored by HMPID in AliESDtrack
	20	// point- reference to the object where to store the point
	21	// Returns: status of operation if FALSE then AliReconstruction::WriteAlignmentData() do not store this point to array of points for current track.
	22	if(idx<0) return kFALSE; //no MIP cluster assigned to this track in PropagateBack()
	23	Int_t iCham=idx/1000000;
	24	Int_t iClu=idx%1000000;
	25	point.SetVolumeID(AliAlignObj::LayerToVolUID(AliAlignObj::kHMPID,iCham-1));//layer and chamber number
	26	AliHMPID pRich=((AliHMPID)gAlice->GetDetector("HMPID"));
	27	AliHMPIDCluster pClu=(AliHMPIDCluster)pRich->CluLst(iCham)->UncheckedAt(iClu);//get pointer to cluster
	28	Double_t mars[3];
	29	AliHMPIDParam::Instance()->Lors2Mars(iCham,pClu->X(),pClu->Y(),mars);
	30	point.SetXYZ(mars[0],mars[1],mars[2]);
	31	return kTRUE;
	32	}
	33	//++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
	34	Int_t AliHMPIDTracker::LoadClusters(TTree *pCluTree)
	35	{
	36	// Interface callback methode invoked from AliReconstruction::RunTracking() to load HMPID clusters before PropagateBack() gets control
	37	// Arguments: pCluTree- pointer to clusters tree got by AliHMPIDLoader::LoadRecPoints("read") then AliHMPIDLoader::TreeR()
	38	// Returns: error code (currently ignored in AliReconstruction::RunTraking())
	39	AliDebug(1,"Start."); pCluTree->GetEntry(0); AliDebug(1,"Stop."); return 0;
	40	}
	41	//++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
	42	Int_t AliHMPIDTracker::PropagateBack(AliESD *pEsd)
	43	{
	44	// This method defined as pure virtual in AliTracker. It is invoked from AliReconstruction::RunTracking() after invocation of AliTracker::LoadClusters()
	45	// Agruments: pEsd - pointer to ESD
	46	// Returns: error code
	47	AliCDBEntry *pNmeanEnt =AliCDBManager::Instance()->Get("HMPID/Calib/Nmean",pEsd->GetRunNumber()); //contains TObjArray of 21 TF1
	48	AliCDBEntry *pQthreEnt =AliCDBManager::Instance()->Get("HMPID/Calib/Qthre",pEsd->GetRunNumber()); //contains TObjArray of 7 TF1
	49	if(!pNmeanEnt) AliFatal("No Nmean C6F14 ");
	50	if(!pQthreEnt) AliFatal("No Qthre");
	51
	52	AliHMPID pHmpid=((AliHMPID)gAlice->GetDetector("HMPID"));
	53	return Recon(pEsd,pHmpid->CluLst(),(TObjArray*)pNmeanEnt->GetObject());
	54	}
	55	//++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
	56	Int_t AliHMPIDTracker::Recon(AliESD pEsd,TObjArray pCluAll,TObjArray *pNmean)
	57	{
	58	// Interface callback method invoked by AliRecontruction::RunTracking() during tracking after TOF. It's done just once per event
	59	// Arguments: pEsd - pointer to Event Summary Data class instance which contains a list of tracks
	60	// Returns: error code, 0 if no errors
	61	Int_t iNtracks=pEsd->GetNumberOfTracks(); AliDebugClass(1,Form("Start with %i tracks",iNtracks));
	62
	63	AliHMPIDRecon recon; //instance of reconstruction class, nothing important in ctor
	64	Double_t xPc,yPc;
	65	for(Int_t iTrk=0;iTrk<iNtracks;iTrk++){ //ESD tracks loop
	66	AliESDtrack *pTrk = pEsd->GetTrack(iTrk); //get next reconstructed track
	67	Int_t cham=IntTrkCha(pTrk,xPc,yPc); //get chamber intersected by this track
	68	if(cham<0) continue; //no intersection at all, go after next track
	69	Double_t nmean=((TF1)pNmean->At(3cham))->Eval(pEsd->GetTimeStamp()); //C6F14 Nmean for this chamber
	70	recon.SetImpPC(xPc,yPc); //store track impact to PC
	71	recon.CkovAngle(pTrk,(TClonesArray *)pCluAll->At(cham),nmean); //search for Cerenkov angle of this track
	72	} //ESD tracks loop
	73	AliDebugClass(1,"Stop pattern recognition");
	74	return 0; // error code: 0=no error;
	75	}//PropagateBack()
	76	//++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
	77	Int_t AliHMPIDTracker::IntTrkCha(AliESDtrack *pTrk,Double_t &xToPc,Double_t &yToPc)
	78	{
	79	// Static method to find intersection in between given track and HMPID chambers
	80	// Arguments: pTrk - ESD track
	81	// xPc,yPc - track intersection with PC, LORS
	82	// Returns: intersected chamber ID or -1
	83
	84	AliHMPIDParam *pParam=AliHMPIDParam::Instance();
	85	Float_t xRa=0,yRa=0,xPc=0,yPc=0,theta=0,phi=0; //track intersection point and angles, LORS
	86	for(Int_t i=AliHMPIDDigit::kMinCh;i<=AliHMPIDDigit::kMaxCh;i++){ //chambers loop
	87	Double_t p1[3],n1[3]; pParam->Norm(i,n1); pParam->Lors2Mars(i,0,0,p1,AliHMPIDParam::kRad); //point & norm for RAD
	88	Double_t p2[3],n2[3]; pParam->Norm(i,n2); pParam->Lors2Mars(i,0,0,p2,AliHMPIDParam::kPc); //point & norm for PC
	89
	90	if(pTrk->Intersect(p1,n1,-GetBz())==kFALSE) continue; //try to intersect track with the middle of radiator
	91	if(pTrk->Intersect(p2,n2,-GetBz())==kFALSE) continue; //try to intersect track with PC
	92
	93	pParam->Mars2LorsVec(i,n1,theta,phi); //track angles at RAD
	94	pParam->Mars2Lors (i,p1,xRa,yRa); //TRKxRAD position
	95	pParam->Mars2Lors (i,p2,xPc,yPc); //TRKxPC position
	96	xToPc=(Double_t)xPc;yToPc=(Double_t)yPc; //conversion float->double only
	97	if(AliHMPIDDigit::IsInside(xPc,yPc,pParam->DistCut())==kFALSE) continue; //not in active area
	98	pTrk->SetHMPIDtrk (xRa,yRa,theta,phi); //store track intersection info
	99	pTrk->SetHMPIDcluIdx (i,0);
	100	return i;
	101	} //chambers loop
	102	return -1; //no intersection with HMPID chambers
	103	}