[u/mrichter/AliRoot.git] / RICH / AliRICHClusterFinder.cxx

/**************************************************************************
 * Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved. *
 *                                                                        *
 * Author: The ALICE Off-line Project.                                    *
 * Contributors are mentioned in the code where appropriate.              *
 *                                                                        *
 * Permission to use, copy, modify and distribute this software and its   *
 * documentation strictly for non-commercial purposes is hereby granted   *
 * without fee, provided that the above copyright notice appears in all   *
 * copies and that both the copyright notice and this permission notice   *
 * appear in the supporting documentation. The authors make no claims     *
 * about the suitability of this software for any purpose. It is          *
 * provided "as is" without express or implied warranty.                  *
 **************************************************************************/


#include "AliRICHClusterFinder.h"
#include "AliRICHMap.h"
#include <TMinuit.h>
#include <TParticle.h>
#include <TVector3.h>
#include <AliLoader.h>
#include <AliStack.h>
#include <AliRun.h>

void RICHMinMathieson(Int_t &npar, Double_t *gin, Double_t &chi2, Double_t *par, Int_t iflag);

ClassImp(AliRICHClusterFinder)
//__________________________________________________________________________________________________
AliRICHClusterFinder::AliRICHClusterFinder(AliRICH *pRICH)   
{//main ctor
//  Info("main ctor","Start.");
  
  fRICH = pRICH;
  
  fHitMap = 0;
  fRawCluster.Reset();
  fResolvedCluster.Reset();
  
}//main ctor
//__________________________________________________________________________________________________
void AliRICHClusterFinder::FindLocalMaxima()
{
//  Find number of local maxima in the cluster
//  Info("FindLocalMaxima","Start.");
  
  fNlocals = 0;
  for(Int_t iDig1=0;iDig1<fRawCluster.Size();iDig1++) {
    Int_t iNotMax = 0;
    AliRICHdigit *pDig1 = (AliRICHdigit *)fRawCluster.Digits()->At(iDig1);
    Int_t padX1 = pDig1->X();
    Int_t padY1 = pDig1->Y();
    Int_t padQ1 = (Int_t)(pDig1->Q()+0.1);
    Int_t padC1 = pDig1->ChFbMi();
    for(Int_t iDig2=0;iDig2<fRawCluster.Size();iDig2++) {
      AliRICHdigit *pDig2 = (AliRICHdigit *)fRawCluster.Digits()->At(iDig2);
      Int_t padX2 = pDig2->X();
      Int_t padY2 = pDig2->Y();
      Int_t padQ2 = (Int_t)(pDig2->Q()+0.1);
      if(iDig1==iDig2) continue;
      Int_t diffx = TMath::Sign(padX1-padX2,1);
      Int_t diffy = TMath::Sign(padY1-padY2,1);
      if((diffx+diffy)<=1) {
         if(padQ2>=padQ1) iNotMax++;
      }
    }
    if(iNotMax==0) {
      TVector2 x2=AliRICHParam::Pad2Loc(padX1,padY1);
      fLocalX[fNlocals]=x2.X();fLocalY[fNlocals]=x2.Y();
      fLocalQ[fNlocals] = (Double_t)padQ1;
      fLocalC[fNlocals] = padC1;
      fNlocals++;
    }
  }
}//FindLocalMaxima()
//__________________________________________________________________________________________________
void AliRICHClusterFinder::Exec()
{
  if(GetDebug()) Info("Exec","Start.");
  
  
  Rich()->GetLoader()->LoadDigits(); 
  
  Rich()->GetLoader()->GetRunLoader()->LoadHeader();
  Rich()->GetLoader()->GetRunLoader()->LoadKinematics();

  for(Int_t iEventN=0;iEventN<gAlice->GetEventsPerRun();iEventN++){//events loop
    if(GetDebug()) Info("Exec","Event %i processed.",iEventN+1);
//    gAlice->GetRunLoader()->GetEvent(iEventN);
    Rich()->GetLoader()->GetRunLoader()->GetEvent(iEventN);
    
    Rich()->GetLoader()->MakeTree("R");  Rich()->MakeBranch("R");
    Rich()->ResetDigits();  Rich()->ResetClusters();
    
    Rich()->GetLoader()->TreeD()->GetEntry(0);
    for(Int_t iChamber=1;iChamber<=kNCH;iChamber++){//chambers loop
      FindClusters(iChamber);
    }//chambers loop
    Rich()->GetLoader()->TreeR()->Fill();
    Rich()->GetLoader()->WriteRecPoints("OVERWRITE");
  }//events loop  
  Rich()->GetLoader()->UnloadDigits(); Rich()->GetLoader()->UnloadRecPoints();  
  Rich()->ResetDigits();  Rich()->ResetClusters();
  
  Rich()->GetLoader()->GetRunLoader()->UnloadHeader();
  Rich()->GetLoader()->GetRunLoader()->UnloadKinematics();

  if(GetDebug()) Info("Exec","Stop.");      
}//Exec()
//__________________________________________________________________________________________________
void AliRICHClusterFinder::FindClusters(Int_t iChamber)
{
  //finds neighbours and fill the tree with raw clusters
  Int_t nDigits=Rich()->Digits(iChamber)->GetEntriesFast();
//  Info("FindClusters","Start for Chamber %i with %i digits.",iChamber,nDigits);  
  if(nDigits==0)return;

  fHitMap=new AliRICHMap(Rich()->Digits(iChamber));//create digit map for the given chamber

  for(Int_t iDig=0;iDig<nDigits;iDig++){    
    AliRICHdigit *dig=(AliRICHdigit*)Rich()->Digits(iChamber)->At(iDig);
    Int_t i=dig->X();   Int_t j=dig->Y();
    if(fHitMap->TestHit(i,j)==kUsed) continue;
	
    FormRawCluster(i,j);
    FindLocalMaxima();
//    cout << " fNlocals in FindCluster " << fNlocals << endl;
    fRawCluster.CoG(fNlocals); // first initial approxmation of the CoG...to start minimization.
    
    if(AliRICHParam::IsResolveClusters()) {
      ResolveCluster(); // ResolveCluster serialization will happen inside
    } else {
      WriteRawCluster(); // simply output of the RawCluster found without deconvolution
    }
    fRawCluster.Reset();
    fResolvedCluster.Reset();
  }//digits loop

  delete fHitMap;
//  Info("FindClusters","Stop.");
  
}//FindClusters()
//__________________________________________________________________________________________________
void AliRICHClusterFinder::FindClusterContribs(AliRICHcluster *pCluster)
{
// finds CombiPid for a given cluster
// Info("FindClusterContribs","Start");
  
  TObjArray *pDigits = pCluster->Digits();
  Int_t iNmips=0,iNckovs=0,iNfeeds=0;
  TArrayI contribs(3*pCluster->Size());
  Int_t *pindex = new Int_t[3*pCluster->Size()];
  for(Int_t iDigN=0;iDigN<pCluster->Size();iDigN++) {//loop on digits of a given cluster
    contribs[3*iDigN]  =((AliRICHdigit*)pDigits->At(iDigN))->Tid(0);
    if (contribs[3*iDigN] >= 10000000) contribs[3*iDigN] = 0;
    contribs[3*iDigN+1]=((AliRICHdigit*)pDigits->At(iDigN))->Tid(1);
    if (contribs[3*iDigN+1] >= 10000000) contribs[3*iDigN+1] = 0;
    contribs[3*iDigN+2]=((AliRICHdigit*)pDigits->At(iDigN))->Tid(2);
    if (contribs[3*iDigN+2] >= 10000000) contribs[3*iDigN+2] = 0;
  }//loop on digits of a given cluster
  TMath::Sort(contribs.GetSize(),contribs.GetArray(),pindex);
  for(Int_t iDigN=0;iDigN<3*pCluster->Size()-1;iDigN++) {//loop on digits to sort Tid
    if(contribs[pindex[iDigN]]!=contribs[pindex[iDigN+1]]) {
      TParticle* particle = Rich()->GetLoader()->GetRunLoader()->Stack()->Particle(contribs[pindex[iDigN]]);
      Int_t code   = particle->GetPdgCode();
      Double_t charge = 0;
      if (particle->GetPDG()) particle->GetPDG()->Charge();

      if(code==50000050) iNckovs++;
      else if(code==50000051) iNfeeds++;
      else if(charge!=0) iNmips++;
      if (contribs[pindex[iDigN+1]]==kBad) break;
    }
  }//loop on digits to sort Tid
  pCluster->SetCombiPid(iNckovs,iNfeeds,iNmips);
//  pCluster->Print();
  delete [] pindex; 
}//FindClusterContribs()
//__________________________________________________________________________________________________
void  AliRICHClusterFinder::FormRawCluster(Int_t i, Int_t j)
{
// Builder of the final Raw Cluster (before deconvolution)  
  if(GetDebug()) Info("FormRawCluster","Start with digit(%i,%i)",i,j);
  
  fRawCluster.AddDigit((AliRICHdigit*) fHitMap->GetHit(i,j));
  fHitMap->FlagHit(i,j);// Flag hit as taken  

  Int_t listX[4], listY[4];    //  Now look recursively for all neighbours
  for (Int_t iNeighbour=0;iNeighbour<Rich()->P()->PadNeighbours(i,j,listX,listY);iNeighbour++)
    if(fHitMap->TestHit(listX[iNeighbour],listY[iNeighbour])==kUnused) 
                      FormRawCluster(listX[iNeighbour],listY[iNeighbour]);    
}//FormRawCluster()
//__________________________________________________________________________________________________
void AliRICHClusterFinder::ResolveCluster()
{// Decluster algorithm
  if(GetDebug()) {Info("ResolveCluster","Start."); fRawCluster.Print();}
  
  switch (fRawCluster.Size()) {
  
  case 1:                     // nothing to decluster: cluster size = 1
    WriteRawCluster();break; 
  default:                     // cluster size > 1: if=2 FitCoG; if>2 Resolve and FitCoG
    FitCoG();break;
  }     
}//ResolveCluster()
//__________________________________________________________________________________________________
void AliRICHClusterFinder::WriteRawCluster()
{
// out the current raw cluster
  if(GetDebug()) Info("WriteRawCluster","Start.");
  
  FindClusterContribs(&fRawCluster);
  if(GetDebug()) fRawCluster.Dump();
  Rich()->AddCluster(fRawCluster);
//  fRawCluster.Print();
}//WriteRawCluster()
//__________________________________________________________________________________________________
void AliRICHClusterFinder::WriteResolvedCluster()
{
// out the current resolved cluster
  if(GetDebug()) Info("WriteResolvedCluster","Start.");
  
//  FindClusterContribs(&fResolvedCluster);
  Rich()->AddCluster(fResolvedCluster);
  
}//WriteResolvedCluster()
//__________________________________________________________________________________________________
void AliRICHClusterFinder::FitCoG()
{// Fit cluster size 2 by single Mathieson
  if(GetDebug()) Info("FitCoG","Start with size %3i and local maxima %3i",fRawCluster.Size(),fNlocals);
  
  Double_t arglist;
  Int_t ierflag = 0;

//  fRawCluster.Print();
//  if(fNlocals==0) fRawCluster.Print();
  if(fNlocals==0||fNlocals>3) {WriteRawCluster();return;}
  
  TMinuit *pMinuit = new TMinuit(3*fNlocals-1);
  pMinuit->mninit(5,10,7);
  
  arglist = -1;
  pMinuit->mnexcm("SET PRI",&arglist, 1, ierflag);
  pMinuit->mnexcm("SET NOW",&arglist, 0, ierflag);
  
  TString chname;
  Int_t ierflg;
  
  pMinuit->SetObjectFit((TObject*)this);
  pMinuit->SetFCN(RICHMinMathieson);
  
  Double_t vstart,lower, upper;
  Double_t stepX= 0.001;
  Double_t stepY= 0.001;
  Double_t stepQ= 0.0001;
  
  for(Int_t i=0;i<fNlocals;i++) {
    vstart   = fLocalX[i];
    lower    = vstart - 2*AliRICHParam::PadSizeX();
    upper    = vstart + 2*AliRICHParam::PadSizeX();
    pMinuit->mnparm(3*i  ,Form("xCoG  %i",i),vstart,stepX,lower,upper,ierflag);
//    cout << Form("xCoG  %i",i) << "start " << vstart << "lower " << lower << "upper " << upper << endl;
    vstart   = fLocalY[i];
    lower    = vstart - 2*AliRICHParam::PadSizeY();
    upper    = vstart + 2*AliRICHParam::PadSizeY();
    pMinuit->mnparm(3*i+1,Form("yCoG  %i",i),vstart,stepY,lower,upper,ierflag);
//    cout << Form("yCoG  %i",i) << "start " << vstart << "lower " << lower << "upper " << upper << endl;
    if(i==fNlocals-1) break;                    // last parameter is constrained
    vstart = fLocalQ[i]/fRawCluster.Q();
    lower  = 0;
    upper  = 1;
    pMinuit->mnparm(3*i+2,Form("qfrac %i",i),vstart,stepQ,lower,upper,ierflag);
//    cout << Form("qCoG  %i",i) << "start " << vstart << "lower " << lower << "upper " << upper << endl;

  }
  
  arglist = -1;
  pMinuit->mnexcm("SET NOGR",&arglist, 1, ierflag);
  arglist = 1;
  pMinuit->mnexcm("SET ERR", &arglist, 1,ierflg);
  arglist = -1;
  pMinuit->mnexcm("SIMPLEX",&arglist, 0, ierflag);
  pMinuit->mnexcm("MIGRAD",&arglist, 0, ierflag);
  pMinuit->mnexcm("EXIT" ,&arglist, 0, ierflag);

  Double_t xCoG[50],yCoG[50],qfracCoG[50];
  Double_t eps, b1, b2;

  Double_t qfraclast=0;  
  for(Int_t i=0;i<fNlocals;i++) {
    pMinuit->mnpout(3*i  ,chname,     xCoG[i], eps , b1, b2, ierflg);
    pMinuit->mnpout(3*i+1,chname,     yCoG[i], eps , b1, b2, ierflg);
    if(i==fNlocals-1) break;
    pMinuit->mnpout(3*i+2,chname, qfracCoG[i], eps , b1, b2, ierflg);
    qfraclast+=qfracCoG[i];
   }
  qfracCoG[fNlocals-1] = 1 - qfraclast;
  delete pMinuit;

  for(Int_t i=0;i<fNlocals;i++) {

    if(fNlocals==5) {
    cout << " Start writing  deconvolved cluster n." << i << endl;
    cout << " fRawCluster " << &fRawCluster << " xCoG " << xCoG[i] << " yCoG " << yCoG[i] << " qfrac " << qfracCoG[i] << endl;
    cout << " Combipid " << fLocalC[i] << " for maximum n. " << i << endl; 
  }
    fResolvedCluster.Fill(&fRawCluster,xCoG[i],yCoG[i],qfracCoG[i],fLocalC[i]);
//    fResolvedCluster.Print();
    WriteResolvedCluster();
  }
if(fNlocals==5)  Info("CoG","Stop.");
}//FitCoG()
//__________________________________________________________________________________________________
void RICHMinMathieson(Int_t &npar, Double_t *, Double_t &chi2, Double_t *par, Int_t )
{
// Mathieson minimization function 
  
  AliRICHcluster *pRawCluster = ((AliRICHClusterFinder*)gMinuit->GetObjectFit())->GetRawCluster();

  TVector2 centroid[50];
  Double_t q[50];
  Int_t nFunctions = (npar+1)/3;
  Double_t qfract = 0;
  for(Int_t i=0;i<nFunctions;i++) {
    centroid[i].Set(par[3*i],par[3*i+1]);
    if(i==nFunctions-1) break;
    q[i]=par[3*i+2];
    qfract+=q[i];
  }
  q[nFunctions-1] = 1 - qfract;
    
  chi2 = 0;
  Int_t qtot = pRawCluster->Q();
  for(Int_t i=0;i<pRawCluster->Size();i++) {
    Int_t    padX = ((AliRICHdigit *)pRawCluster->Digits()->At(i))->X();
    Int_t    padY = ((AliRICHdigit *)pRawCluster->Digits()->At(i))->Y();
    Double_t padQ = ((AliRICHdigit *)pRawCluster->Digits()->At(i))->Q();
    Double_t qfracpar=0;
    for(Int_t j=0;j<nFunctions;j++) {
      qfracpar += q[j]*AliRICHParam::FracQdc(centroid[j],padX,padY);
//      cout << " function n. " << j+1 << " q " << q[j] << " fracMat " << AliRICHParam::FracQdc(centroid[j],padX,padY) 
//           << " xpar " << centroid[j].X() << " ypar " << centroid[j].Y() << endl;
    }
    chi2 += TMath::Power((qtot*qfracpar-padQ),2)/padQ;
//    cout << " chi2 " << chi2 << " pad n. " << i << " qfracpar " << qfracpar << endl;
  }     
//  if(iflag==3) {
//    cout << " chi2 final " << chi2 << endl;
//  }
}//RICHMinMathieson()
Commit	Line	Data
8265fa96	1	/**************************************************************************
	2	* Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved. *
	3	* *
	4	* Author: The ALICE Off-line Project. *
	5	* Contributors are mentioned in the code where appropriate. *
	6	* *
	7	* Permission to use, copy, modify and distribute this software and its *
	8	* documentation strictly for non-commercial purposes is hereby granted *
	9	* without fee, provided that the above copyright notice appears in all *
	10	* copies and that both the copyright notice and this permission notice *
	11	* appear in the supporting documentation. The authors make no claims *
	12	* about the suitability of this software for any purpose. It is *
	13	* provided "as is" without express or implied warranty. *
	14	**************************************************************************/
	15
8265fa96	16
8265fa96	17	#include "AliRICHClusterFinder.h"
543d5224	18	#include "AliRICHMap.h"
9d6f9427	19	#include <TMinuit.h>
ed3ceb24	20	#include <TParticle.h>
9d6f9427	21	#include <TVector3.h>
cbaf35fb	22	#include <AliLoader.h>
ed3ceb24	23	#include <AliStack.h>
cbaf35fb	24	#include <AliRun.h>
8265fa96	25
9d6f9427	26	void RICHMinMathieson(Int_t &npar, Double_t gin, Double_t &chi2, Double_t par, Int_t iflag);
8265fa96	27
8265fa96	28	ClassImp(AliRICHClusterFinder)
543d5224	29	//__________________________________________________________________________________________________
	30	AliRICHClusterFinder::AliRICHClusterFinder(AliRICH *pRICH)
	31	{//main ctor
0f72f306	32	// Info("main ctor","Start.");
543d5224	33
cbaf35fb	34	fRICH = pRICH;
543d5224	35
6865fb8d	36	fHitMap = 0;
	37	fRawCluster.Reset();
	38	fResolvedCluster.Reset();
543d5224	39
543d5224	40	}//main ctor
543d5224	41	//__________________________________________________________________________________________________
9d6f9427	42	void AliRICHClusterFinder::FindLocalMaxima()
6865fb8d	43	{
6865fb8d	44	// Find number of local maxima in the cluster
0f72f306	45	// Info("FindLocalMaxima","Start.");
6865fb8d	46
	47	fNlocals = 0;
	48	for(Int_t iDig1=0;iDig1<fRawCluster.Size();iDig1++) {
cbaf35fb	49	Int_t iNotMax = 0;
6865fb8d	50	AliRICHdigit pDig1 = (AliRICHdigit )fRawCluster.Digits()->At(iDig1);
cbaf35fb	51	Int_t padX1 = pDig1->X();
cbaf35fb	52	Int_t padY1 = pDig1->Y();
6865fb8d	53	Int_t padQ1 = (Int_t)(pDig1->Q()+0.1);
d4c94996	54	Int_t padC1 = pDig1->ChFbMi();
6865fb8d	55	for(Int_t iDig2=0;iDig2<fRawCluster.Size();iDig2++) {
6865fb8d	56	AliRICHdigit pDig2 = (AliRICHdigit )fRawCluster.Digits()->At(iDig2);
cbaf35fb	57	Int_t padX2 = pDig2->X();
cbaf35fb	58	Int_t padY2 = pDig2->Y();
6865fb8d	59	Int_t padQ2 = (Int_t)(pDig2->Q()+0.1);
cbaf35fb	60	if(iDig1==iDig2) continue;
	61	Int_t diffx = TMath::Sign(padX1-padX2,1);
	62	Int_t diffy = TMath::Sign(padY1-padY2,1);
	63	if((diffx+diffy)<=1) {
6865fb8d	64	if(padQ2>=padQ1) iNotMax++;
cbaf35fb	65	}
8265fa96	66	}
cbaf35fb	67	if(iNotMax==0) {
3582c1f9	68	TVector2 x2=AliRICHParam::Pad2Loc(padX1,padY1);
3582c1f9	69	fLocalX[fNlocals]=x2.X();fLocalY[fNlocals]=x2.Y();
6865fb8d	70	fLocalQ[fNlocals] = (Double_t)padQ1;
	71	fLocalC[fNlocals] = padC1;
	72	fNlocals++;
8265fa96	73	}
6865fb8d	74	}
cbaf35fb	75	}//FindLocalMaxima()
543d5224	76	//__________________________________________________________________________________________________
543d5224	77	void AliRICHClusterFinder::Exec()
237c933d	78	{
89924db8	79	if(GetDebug()) Info("Exec","Start.");
543d5224	80
cbaf35fb	81
543d5224	82	Rich()->GetLoader()->LoadDigits();
543d5224	83
ed3ceb24	84	Rich()->GetLoader()->GetRunLoader()->LoadHeader();
	85	Rich()->GetLoader()->GetRunLoader()->LoadKinematics();
	86
543d5224	87	for(Int_t iEventN=0;iEventN<gAlice->GetEventsPerRun();iEventN++){//events loop
89924db8	88	if(GetDebug()) Info("Exec","Event %i processed.",iEventN+1);
6865fb8d	89	// gAlice->GetRunLoader()->GetEvent(iEventN);
6865fb8d	90	Rich()->GetLoader()->GetRunLoader()->GetEvent(iEventN);
237c933d	91
543d5224	92	Rich()->GetLoader()->MakeTree("R"); Rich()->MakeBranch("R");
cbaf35fb	93	Rich()->ResetDigits(); Rich()->ResetClusters();
543d5224	94
543d5224	95	Rich()->GetLoader()->TreeD()->GetEntry(0);
cbaf35fb	96	for(Int_t iChamber=1;iChamber<=kNCH;iChamber++){//chambers loop
ed3ceb24	97	FindClusters(iChamber);
543d5224	98	}//chambers loop
543d5224	99	Rich()->GetLoader()->TreeR()->Fill();
	100	Rich()->GetLoader()->WriteRecPoints("OVERWRITE");
	101	}//events loop
	102	Rich()->GetLoader()->UnloadDigits(); Rich()->GetLoader()->UnloadRecPoints();
cbaf35fb	103	Rich()->ResetDigits(); Rich()->ResetClusters();
ed3ceb24	104
	105	Rich()->GetLoader()->GetRunLoader()->UnloadHeader();
	106	Rich()->GetLoader()->GetRunLoader()->UnloadKinematics();
	107
89924db8	108	if(GetDebug()) Info("Exec","Stop.");
543d5224	109	}//Exec()
543d5224	110	//__________________________________________________________________________________________________
ed3ceb24	111	void AliRICHClusterFinder::FindClusters(Int_t iChamber)
	112	{
	113	//finds neighbours and fill the tree with raw clusters
cbaf35fb	114	Int_t nDigits=Rich()->Digits(iChamber)->GetEntriesFast();
0f72f306	115	// Info("FindClusters","Start for Chamber %i with %i digits.",iChamber,nDigits);
cbaf35fb	116	if(nDigits==0)return;
cbaf35fb	117
eaf390d9	118	fHitMap=new AliRICHMap(Rich()->Digits(iChamber));//create digit map for the given chamber
cbaf35fb	119
cbaf35fb	120	for(Int_t iDig=0;iDig<nDigits;iDig++){
e33758d8	121	AliRICHdigit dig=(AliRICHdigit)Rich()->Digits(iChamber)->At(iDig);
cbaf35fb	122	Int_t i=dig->X(); Int_t j=dig->Y();
	123	if(fHitMap->TestHit(i,j)==kUsed) continue;
	124
9d6f9427	125	FormRawCluster(i,j);
6865fb8d	126	FindLocalMaxima();
	127	// cout << " fNlocals in FindCluster " << fNlocals << endl;
	128	fRawCluster.CoG(fNlocals); // first initial approxmation of the CoG...to start minimization.
	129
cbaf35fb	130	if(AliRICHParam::IsResolveClusters()) {
9d6f9427	131	ResolveCluster(); // ResolveCluster serialization will happen inside
cbaf35fb	132	} else {
9d6f9427	133	WriteRawCluster(); // simply output of the RawCluster found without deconvolution
ed3ceb24	134	}
6865fb8d	135	fRawCluster.Reset();
6865fb8d	136	fResolvedCluster.Reset();
cbaf35fb	137	}//digits loop
	138
	139	delete fHitMap;
0f72f306	140	// Info("FindClusters","Stop.");
cbaf35fb	141
ed3ceb24	142	}//FindClusters()
ed3ceb24	143	//__________________________________________________________________________________________________
6865fb8d	144	void AliRICHClusterFinder::FindClusterContribs(AliRICHcluster *pCluster)
ed3ceb24	145	{
3582c1f9	146	// finds CombiPid for a given cluster
3582c1f9	147	// Info("FindClusterContribs","Start");
ed3ceb24	148
6865fb8d	149	TObjArray *pDigits = pCluster->Digits();
ed3ceb24	150	Int_t iNmips=0,iNckovs=0,iNfeeds=0;
6865fb8d	151	TArrayI contribs(3*pCluster->Size());
	152	Int_t pindex = new Int_t[3pCluster->Size()];
	153	for(Int_t iDigN=0;iDigN<pCluster->Size();iDigN++) {//loop on digits of a given cluster
ed3ceb24	154	contribs[3iDigN] =((AliRICHdigit)pDigits->At(iDigN))->Tid(0);
89924db8	155	if (contribs[3iDigN] >= 10000000) contribs[3iDigN] = 0;
ed3ceb24	156	contribs[3iDigN+1]=((AliRICHdigit)pDigits->At(iDigN))->Tid(1);
89924db8	157	if (contribs[3iDigN+1] >= 10000000) contribs[3iDigN+1] = 0;
ed3ceb24	158	contribs[3iDigN+2]=((AliRICHdigit)pDigits->At(iDigN))->Tid(2);
89924db8	159	if (contribs[3iDigN+2] >= 10000000) contribs[3iDigN+2] = 0;
ed3ceb24	160	}//loop on digits of a given cluster
ed3ceb24	161	TMath::Sort(contribs.GetSize(),contribs.GetArray(),pindex);
6865fb8d	162	for(Int_t iDigN=0;iDigN<3*pCluster->Size()-1;iDigN++) {//loop on digits to sort Tid
ed3ceb24	163	if(contribs[pindex[iDigN]]!=contribs[pindex[iDigN+1]]) {
89924db8	164	TParticle* particle = Rich()->GetLoader()->GetRunLoader()->Stack()->Particle(contribs[pindex[iDigN]]);
	165	Int_t code = particle->GetPdgCode();
	166	Double_t charge = 0;
	167	if (particle->GetPDG()) particle->GetPDG()->Charge();
ed3ceb24	168
	169	if(code==50000050) iNckovs++;
	170	else if(code==50000051) iNfeeds++;
	171	else if(charge!=0) iNmips++;
	172	if (contribs[pindex[iDigN+1]]==kBad) break;
	173	}
	174	}//loop on digits to sort Tid
6865fb8d	175	pCluster->SetCombiPid(iNckovs,iNfeeds,iNmips);
6865fb8d	176	// pCluster->Print();
ed3ceb24	177	delete [] pindex;
3582c1f9	178	}//FindClusterContribs()
cbaf35fb	179	//__________________________________________________________________________________________________
9d6f9427	180	void AliRICHClusterFinder::FormRawCluster(Int_t i, Int_t j)
ed3ceb24	181	{
3582c1f9	182	// Builder of the final Raw Cluster (before deconvolution)
3582c1f9	183	if(GetDebug()) Info("FormRawCluster","Start with digit(%i,%i)",i,j);
cbaf35fb	184
6865fb8d	185	fRawCluster.AddDigit((AliRICHdigit*) fHitMap->GetHit(i,j));
cbaf35fb	186	fHitMap->FlagHit(i,j);// Flag hit as taken
	187
	188	Int_t listX[4], listY[4]; // Now look recursively for all neighbours
d4c94996	189	for (Int_t iNeighbour=0;iNeighbour<Rich()->P()->PadNeighbours(i,j,listX,listY);iNeighbour++)
cbaf35fb	190	if(fHitMap->TestHit(listX[iNeighbour],listY[iNeighbour])==kUnused)
9d6f9427	191	FormRawCluster(listX[iNeighbour],listY[iNeighbour]);
3582c1f9	192	}//FormRawCluster()
cbaf35fb	193	//__________________________________________________________________________________________________
9d6f9427	194	void AliRICHClusterFinder::ResolveCluster()
cbaf35fb	195	{// Decluster algorithm
3582c1f9	196	if(GetDebug()) {Info("ResolveCluster","Start."); fRawCluster.Print();}
cbaf35fb	197
6865fb8d	198	switch (fRawCluster.Size()) {
	199
	200	case 1: // nothing to decluster: cluster size = 1
	201	WriteRawCluster();break;
	202	default: // cluster size > 1: if=2 FitCoG; if>2 Resolve and FitCoG
	203	FitCoG();break;
9d6f9427	204	}
cbaf35fb	205	}//ResolveCluster()
cbaf35fb	206	//__________________________________________________________________________________________________
9d6f9427	207	void AliRICHClusterFinder::WriteRawCluster()
6865fb8d	208	{
6865fb8d	209	// out the current raw cluster
89924db8	210	if(GetDebug()) Info("WriteRawCluster","Start.");
cbaf35fb	211
6865fb8d	212	FindClusterContribs(&fRawCluster);
2d226d6b	213	if(GetDebug()) fRawCluster.Dump();
6865fb8d	214	Rich()->AddCluster(fRawCluster);
6865fb8d	215	// fRawCluster.Print();
cbaf35fb	216	}//WriteRawCluster()
cbaf35fb	217	//__________________________________________________________________________________________________
6865fb8d	218	void AliRICHClusterFinder::WriteResolvedCluster()
	219	{
	220	// out the current resolved cluster
89924db8	221	if(GetDebug()) Info("WriteResolvedCluster","Start.");
6865fb8d	222
	223	// FindClusterContribs(&fResolvedCluster);
	224	Rich()->AddCluster(fResolvedCluster);
	225
	226	}//WriteResolvedCluster()
	227	//__________________________________________________________________________________________________
9d6f9427	228	void AliRICHClusterFinder::FitCoG()
9d6f9427	229	{// Fit cluster size 2 by single Mathieson
89924db8	230	if(GetDebug()) Info("FitCoG","Start with size %3i and local maxima %3i",fRawCluster.Size(),fNlocals);
6865fb8d	231
0f72f306	232	Double_t arglist;
0f72f306	233	Int_t ierflag = 0;
6865fb8d	234
6865fb8d	235	// fRawCluster.Print();
19dd5b2f	236	// if(fNlocals==0) fRawCluster.Print();
6865fb8d	237	if(fNlocals==0\|\|fNlocals>3) {WriteRawCluster();return;}
9d6f9427	238
6865fb8d	239	TMinuit pMinuit = new TMinuit(3fNlocals-1);
0f72f306	240	pMinuit->mninit(5,10,7);
	241
	242	arglist = -1;
	243	pMinuit->mnexcm("SET PRI",&arglist, 1, ierflag);
19dd5b2f	244	pMinuit->mnexcm("SET NOW",&arglist, 0, ierflag);
9d6f9427	245
9d6f9427	246	TString chname;
	247	Int_t ierflg;
	248
	249	pMinuit->SetObjectFit((TObject*)this);
	250	pMinuit->SetFCN(RICHMinMathieson);
6865fb8d	251
	252	Double_t vstart,lower, upper;
	253	Double_t stepX= 0.001;
	254	Double_t stepY= 0.001;
	255	Double_t stepQ= 0.0001;
	256
	257	for(Int_t i=0;i<fNlocals;i++) {
	258	vstart = fLocalX[i];
	259	lower = vstart - 2*AliRICHParam::PadSizeX();
	260	upper = vstart + 2*AliRICHParam::PadSizeX();
	261	pMinuit->mnparm(3*i ,Form("xCoG %i",i),vstart,stepX,lower,upper,ierflag);
	262	// cout << Form("xCoG %i",i) << "start " << vstart << "lower " << lower << "upper " << upper << endl;
	263	vstart = fLocalY[i];
	264	lower = vstart - 2*AliRICHParam::PadSizeY();
	265	upper = vstart + 2*AliRICHParam::PadSizeY();
	266	pMinuit->mnparm(3*i+1,Form("yCoG %i",i),vstart,stepY,lower,upper,ierflag);
	267	// cout << Form("yCoG %i",i) << "start " << vstart << "lower " << lower << "upper " << upper << endl;
	268	if(i==fNlocals-1) break; // last parameter is constrained
	269	vstart = fLocalQ[i]/fRawCluster.Q();
	270	lower = 0;
	271	upper = 1;
	272	pMinuit->mnparm(3*i+2,Form("qfrac %i",i),vstart,stepQ,lower,upper,ierflag);
	273	// cout << Form("qCoG %i",i) << "start " << vstart << "lower " << lower << "upper " << upper << endl;
9d6f9427	274
6865fb8d	275	}
6865fb8d	276
9d6f9427	277	arglist = -1;
9d6f9427	278	pMinuit->mnexcm("SET NOGR",&arglist, 1, ierflag);
9d6f9427	279	arglist = 1;
	280	pMinuit->mnexcm("SET ERR", &arglist, 1,ierflg);
	281	arglist = -1;
	282	pMinuit->mnexcm("SIMPLEX",&arglist, 0, ierflag);
	283	pMinuit->mnexcm("MIGRAD",&arglist, 0, ierflag);
6865fb8d	284	pMinuit->mnexcm("EXIT" ,&arglist, 0, ierflag);
	285
	286	Double_t xCoG[50],yCoG[50],qfracCoG[50];
9d6f9427	287	Double_t eps, b1, b2;
6865fb8d	288
	289	Double_t qfraclast=0;
	290	for(Int_t i=0;i<fNlocals;i++) {
	291	pMinuit->mnpout(3*i ,chname, xCoG[i], eps , b1, b2, ierflg);
	292	pMinuit->mnpout(3*i+1,chname, yCoG[i], eps , b1, b2, ierflg);
	293	if(i==fNlocals-1) break;
	294	pMinuit->mnpout(3*i+2,chname, qfracCoG[i], eps , b1, b2, ierflg);
	295	qfraclast+=qfracCoG[i];
	296	}
	297	qfracCoG[fNlocals-1] = 1 - qfraclast;
9d6f9427	298	delete pMinuit;
6865fb8d	299
	300	for(Int_t i=0;i<fNlocals;i++) {
	301
	302	if(fNlocals==5) {
	303	cout << " Start writing deconvolved cluster n." << i << endl;
	304	cout << " fRawCluster " << &fRawCluster << " xCoG " << xCoG[i] << " yCoG " << yCoG[i] << " qfrac " << qfracCoG[i] << endl;
	305	cout << " Combipid " << fLocalC[i] << " for maximum n. " << i << endl;
	306	}
	307	fResolvedCluster.Fill(&fRawCluster,xCoG[i],yCoG[i],qfracCoG[i],fLocalC[i]);
	308	// fResolvedCluster.Print();
	309	WriteResolvedCluster();
	310	}
	311	if(fNlocals==5) Info("CoG","Stop.");
09c52ebc	312	}//FitCoG()
9d6f9427	313	//__________________________________________________________________________________________________
6865fb8d	314	void RICHMinMathieson(Int_t &npar, Double_t , Double_t &chi2, Double_t par, Int_t )
09c52ebc	315	{
09c52ebc	316	// Mathieson minimization function
9d6f9427	317
6865fb8d	318	AliRICHcluster pRawCluster = ((AliRICHClusterFinder)gMinuit->GetObjectFit())->GetRawCluster();
9d6f9427	319
3582c1f9	320	TVector2 centroid[50];
6865fb8d	321	Double_t q[50];
	322	Int_t nFunctions = (npar+1)/3;
	323	Double_t qfract = 0;
	324	for(Int_t i=0;i<nFunctions;i++) {
3582c1f9	325	centroid[i].Set(par[3i],par[3i+1]);
6865fb8d	326	if(i==nFunctions-1) break;
	327	q[i]=par[3*i+2];
	328	qfract+=q[i];
	329	}
	330	q[nFunctions-1] = 1 - qfract;
	331
9d6f9427	332	chi2 = 0;
	333	Int_t qtot = pRawCluster->Q();
	334	for(Int_t i=0;i<pRawCluster->Size();i++) {
	335	Int_t padX = ((AliRICHdigit *)pRawCluster->Digits()->At(i))->X();
	336	Int_t padY = ((AliRICHdigit *)pRawCluster->Digits()->At(i))->Y();
	337	Double_t padQ = ((AliRICHdigit *)pRawCluster->Digits()->At(i))->Q();
6865fb8d	338	Double_t qfracpar=0;
6865fb8d	339	for(Int_t j=0;j<nFunctions;j++) {
3582c1f9	340	qfracpar += q[j]*AliRICHParam::FracQdc(centroid[j],padX,padY);
3582c1f9	341	// cout << " function n. " << j+1 << " q " << q[j] << " fracMat " << AliRICHParam::FracQdc(centroid[j],padX,padY)
6865fb8d	342	// << " xpar " << centroid[j].X() << " ypar " << centroid[j].Y() << endl;
9d6f9427	343	}
6865fb8d	344	chi2 += TMath::Power((qtot*qfracpar-padQ),2)/padQ;
	345	// cout << " chi2 " << chi2 << " pad n. " << i << " qfracpar " << qfracpar << endl;
	346	}
	347	// if(iflag==3) {
	348	// cout << " chi2 final " << chi2 << endl;
	349	// }
9d6f9427	350	}//RICHMinMathieson()