[u/mrichter/AliRoot.git] / ITS / AliITSClusterFinderSPD.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 "AliITSClusterFinderSPD.h"
#include "AliITSMapA1.h"
#include "AliITS.h"
#include "AliRun.h"


ClassImp(AliITSClusterFinderSPD)

//----------------------------------------------------------
AliITSClusterFinderSPD::AliITSClusterFinderSPD
(AliITSsegmentation *seg, TClonesArray *digits, TClonesArray *recp)   
{
  // constructor
    fSegmentation=seg;
    fDigits=digits;
    fClusters=recp;
    fNclusters= fClusters->GetEntriesFast();
    SetDx();
    SetDz();
    SetMap();
    SetNCells();
}

//_____________________________________________________________________________
AliITSClusterFinderSPD::AliITSClusterFinderSPD()
{
  // constructor
  fSegmentation=0;
  fDigits=0;
  fClusters=0;
  fNclusters=0;
  fMap=0;
  SetDx();
  SetDz();
  SetNCells();
  
}

//_____________________________________________________________________________
AliITSClusterFinderSPD::~AliITSClusterFinderSPD()
{
  // destructor
  if (fMap) delete fMap;


}
//__________________________________________________________________________
AliITSClusterFinderSPD::AliITSClusterFinderSPD(const AliITSClusterFinderSPD &source){
  //     Copy Constructor 
  if(&source == this) return;
  this->fClusters = source.fClusters ;
  this->fNclusters = source.fNclusters ;
  this->fMap = source.fMap ;
  this->fDz = source.fDz ;
  this->fDx = source.fDx ;
  this->fMinNCells = source.fMinNCells ;
  return;
}

//_________________________________________________________________________
AliITSClusterFinderSPD& 
  AliITSClusterFinderSPD::operator=(const AliITSClusterFinderSPD &source) {
  //    Assignment operator
  if(&source == this) return *this;
  this->fClusters = source.fClusters ;
  this->fNclusters = source.fNclusters ;
  this->fMap = source.fMap ;
  this->fDz = source.fDz ;
  this->fDx = source.fDx ;
  this->fMinNCells = source.fMinNCells ;
  return *this;
}

//_____________________________________________________________________________
void AliITSClusterFinderSPD::SetMap()
{
  // set map

  if(!fMap) fMap=new AliITSMapA1(fSegmentation,fDigits);

}

//_____________________________________________________________________________

void AliITSClusterFinderSPD::Find1DClusters()
{
  // Find one dimensional clusters, i.e.
  // in r*phi(x) direction for each colunm in z direction
  
  AliITS *iTS=(AliITS*)gAlice->GetModule("ITS");
  
  // retrieve the parameters 
  Int_t fNofPixels = fSegmentation->Npz(); 
  Int_t fMaxNofSamples = fSegmentation->Npx();
  
  // read in digits -> do not apply threshold 
  // signal in fired pixels is always 1

  fMap->FillMap();
  
  Int_t nofFoundClusters = 0;
  
  Int_t k,it,m;
  for(k=0;k<fNofPixels;k++) {
    
    Int_t mmax = 10;  // a size of the window for the cluster finding
    
    for(it=0;it<fMaxNofSamples;it++) {
      
      Int_t lclx = 0;
      Int_t xstart = 0;
      Int_t xstop = 0;
      Int_t id = 0;
      Int_t ilcl =0;
      
      for(m=0;m<mmax;m++) {  // find the cluster inside the window
	id = it+m;
	if(id >= fMaxNofSamples) break;    // ! no possible for the fadc 
	
	if(fMap->TestHit(k,id) == kUnused) {   // start of the cluster
	  lclx += 1;
	  if(lclx == 1) xstart = id;
	  
	}
	
	if(lclx > 0 && fMap->TestHit(k,id) == kEmpty) {  
	  // end of cluster if a gap exists
	  xstop = id-1;
	  ilcl = 1;
	  break;
	}            
	
      }   //  end of m-loop
      
      if(lclx == 0 && ilcl == 0) it = id; // no cluster in the window,
      // continue the "it" loop
      
      if(id >= fMaxNofSamples && lclx == 0) break; // the x row finished
      
      if(id < fMaxNofSamples && ilcl == 0 && lclx > 0) {  
	                           // cluster end is outside of the window,
	mmax += 5;                 // increase mmax and repeat the cluster
	                           // finding
	it -= 1;
      }
      
      if(id >= fMaxNofSamples && lclx > 0) {  // the x row finished but
	xstop = fMaxNofSamples - 1;           // the end cluster exists
	ilcl = 1;
      } 
      
      // ---  Calculate z and x coordinates for one dimensional clusters
      
      if(ilcl == 1) {         // new cluster exists
	it = id;
	mmax = 10;
	    nofFoundClusters++;
	    Float_t clusterCharge = 0.;
            Float_t zpitch = fSegmentation->Dpz(k+1); 
	    Float_t clusterZ, dummyX; 
            Int_t dummy=0;
            fSegmentation->GetPadCxz(dummy,k,dummyX,clusterZ);
            Float_t zstart = clusterZ - 0.5*zpitch;
            Float_t zstop = clusterZ + 0.5*zpitch;
	    Float_t clusterX = 0.;
            Int_t xstartfull = xstart;
            Int_t xstopfull = xstop;
	    Int_t clusterSizeX = lclx;
	    Int_t clusterSizeZ = 1;
	    
            Int_t its;
	    for(its=xstart; its<=xstop; its++) {
              Int_t firedpixel=0;
              if (fMap->GetHitIndex(k,its)>=0) firedpixel=1; 
	      clusterCharge += firedpixel;
              clusterX +=its + 0.5;
	    }
            Float_t fRphiPitch = fSegmentation->Dpx(dummy);
	    clusterX /= (clusterSizeX/fRphiPitch); // center of gravity for x 
	    
	    
	    //printf("ClusterZ ClusterX %f %f \n",clusterZ, clusterX);
	    
            // Int_t nclusters = fClusters->GetEntriesFast();
	    //	    	    cout << nclusters << " clusters" << endl;
	    //            cout<< "Create point"<<endl;
	    
	    // Write the points (coordinates and some cluster information) to the
	    // AliITSRawClusterSPD object
	    
	    AliITSRawClusterSPD *clust = new AliITSRawClusterSPD(clusterZ,clusterX,clusterCharge,clusterSizeZ,clusterSizeX,xstart,xstop,xstartfull,xstopfull,zstart,zstop,k);
	    // fClusters->Add(point);
	    iTS->AddCluster(0,clust);
	    //    	    cout << "Cluster at Ladder: " << fLadder << ", Detector: " <<fDetector<<endl;
	    
	    // cout<<" end of cluster finding for Z pixel "<<endl;
	    
      }    // new cluster (ilcl=1)
    } // X direction loop (it)
  } // Z direction loop (k)

  //fMap->ClearMap();
  return;
  
}

//_____________________________________________________________________________
void  AliITSClusterFinderSPD::GroupClusters()
{
  // Find two dimensional clusters, i.e. group one dimensional clusters
  // into two dimensional ones (go both in x and z directions).
  
  // get number of clusters for this module
  Int_t nofClusters = fClusters->GetEntriesFast();
  nofClusters -= fNclusters;
  
  AliITSRawClusterSPD *clusterI;
  AliITSRawClusterSPD *clusterJ;
  
  Int_t *label=new Int_t[nofClusters];  
  Int_t i,j;
  for(i=0; i<nofClusters; i++) label[i] = 0;
  for(i=0; i<nofClusters; i++) {
    if(label[i] != 0) continue;
    for(j=i+1; j<nofClusters; j++) { 
      if(label[j] != 0) continue;
      clusterI = (AliITSRawClusterSPD*) fClusters->At(i);
      clusterJ = (AliITSRawClusterSPD*) fClusters->At(j);
      Bool_t pair = clusterI->Brother(clusterJ,fDz,fDx);
      if(pair) {     
	
	//    if((clusterI->XStop() == clusterJ->XStart()-1)||(clusterI->XStart()==clusterJ->XStop()+1)) cout<<"!! Diagonal cluster"<<endl;
	/*    
	      cout << "clusters " << i << "," << j << " before grouping" << endl;
	      clusterI->PrintInfo();
	      clusterJ->PrintInfo();
	*/    
	clusterI->Add(clusterJ);
	//        cout << "remove cluster " << j << endl;
	label[j] = 1;
	fClusters->RemoveAt(j);
	/*
	  cout << "cluster  " << i << " after grouping" << endl;
	  clusterI->PrintInfo();
	*/
      }  // pair
    } // J clusters  
    label[i] = 1;
  } // I clusters
  fClusters->Compress();
  //  Int_t totalNofClusters = fClusters->GetEntriesFast();
  //  cout << " Nomber of clusters at the group end ="<< totalNofClusters<<endl;
  
  delete [] label;

  return;
  
  
}
//_____________________________________________________________________________

void AliITSClusterFinderSPD::TracksInCluster()
{
  
  // Find tracks creating one cluster

  // get number of clusters for this module
  Int_t nofClusters = fClusters->GetEntriesFast();
  nofClusters -= fNclusters;

  Int_t i, ix, iz, jx, jz, xstart, xstop, zstart, zstop, nclx, nclz;
  //  Int_t signal, track0, track1, track2;
  const Int_t trmax = 100;
  Int_t cltracks[trmax], itr, tracki, ii, is, js, ie, ntr, tr0, tr1, tr2;

  for(i=0; i<nofClusters; i++) { 
    ii = 0;
    memset(cltracks,-1,sizeof(int)*trmax);
    tr0=tr1=tr2=-1;

    AliITSRawClusterSPD *clusterI = (AliITSRawClusterSPD*) fClusters->At(i);

    nclx = clusterI->NclX();
    nclz = clusterI->NclZ();
    xstart = clusterI->XStartf();
    xstop = clusterI->XStopf();
    zstart = clusterI->Zend()-nclz+1;
    zstop = clusterI->Zend();

    Int_t ind; 

     for(iz=0; iz<nclz; iz++) { 
         jz = zstart + iz;
       for(ix=0; ix<nclx; ix++) { 
	 jx = xstart + ix;
	 ind = fMap->GetHitIndex(jz,jx);
	 if(ind == 0 && iz >= 0 && ix > 0) {
          continue;
         }
	 if(ind == 0 && iz > 0 && ix >= 0) {
          continue;
         }
	 if(ind == 0 && iz == 0 && ix == 0 && i > 0) {
          continue;
         }

        AliITSdigitSPD *dig = (AliITSdigitSPD*)fMap->GetHit(jz,jx);
	/*
         signal=dig->fSignal;
         track0=dig->fTracks[0];
         track1=dig->fTracks[1];
         track2=dig->fTracks[2];
	*/
          for(itr=0; itr<3; itr++) { 
	    tracki = dig->fTracks[itr];
            if(tracki >= 0) {
	      ii += 1;
             cltracks[ii-1] = tracki;
            }
	  }
       } // ix pixel
     }  // iz pixel
 
     for(is=0; is<trmax; is++) { 
         if(cltracks[is]<0) continue;
       for(js=is+1; js<trmax; js++) { 
         if(cltracks[js]<0) continue;
         if(cltracks[js]==cltracks[is]) cltracks[js]=-5;
       }
     }

     ntr = 0;
     for(ie=0; ie<trmax; ie++) { 
       if(cltracks[ie] >= 0) {
        ntr=ntr+1;
        if(ntr==1) tr0=cltracks[ie];
        if(ntr==2) tr1=cltracks[ie];
        if(ntr==3) tr2=cltracks[ie];
       }
     }
     // if delta ray only
     if(ntr == 0) ntr = 1;

     clusterI->SetNTracks(ntr);
     clusterI->SetTracks(tr0,tr1,tr2);

  } // I cluster

}
//_____________________________________________________________________________

void AliITSClusterFinderSPD::GetRecPoints()
{
  // get rec points
  AliITS *iTS=(AliITS*)gAlice->GetModule("ITS");
  
  // get number of clusters for this module
  Int_t nofClusters = fClusters->GetEntriesFast();
  nofClusters -= fNclusters;
  const Float_t kconv = 1.0e-4;
  const Float_t kRMSx = 12.0*kconv; // microns -> cm ITS TDR Table 1.3
  const Float_t kRMSz = 70.0*kconv; // microns -> cm ITS TDR Table 1.3

  Float_t spdLength = fSegmentation->Dz();
  Float_t spdWidth = fSegmentation->Dx();

  Int_t i;
  Int_t track0, track1, track2;

  for(i=0; i<nofClusters; i++) { 

    AliITSRawClusterSPD *clusterI = (AliITSRawClusterSPD*) fClusters->At(i);
    clusterI->GetTracks(track0, track1, track2); 
    AliITSRecPoint rnew;

    rnew.SetX((clusterI->X() - spdWidth/2)*kconv);
    rnew.SetZ((clusterI->Z() - spdLength/2)*kconv);
    rnew.SetQ(1.);
    rnew.SetdEdX(0.);
    rnew.SetSigmaX2(kRMSx*kRMSx);
    rnew.SetSigmaZ2(kRMSz*kRMSz);
    rnew.fTracks[0]=track0;
    rnew.fTracks[1]=track1;
    rnew.fTracks[2]=track2;
    iTS->AddRecPoint(rnew);
  } // I clusters

  fMap->ClearMap();
  
}
//_____________________________________________________________________________

void AliITSClusterFinderSPD::FindRawClusters()
{
  // find raw clusters
  Find1DClusters();
  GroupClusters();
  TracksInCluster();
  GetRecPoints();

}
Commit	Line	Data
b0f5e3fc	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
	16
	17	#include "AliITSClusterFinderSPD.h"
e8189707	18	#include "AliITSMapA1.h"
e8189707	19	#include "AliITS.h"
b0f5e3fc	20	#include "AliRun.h"
	21
	22
	23
	24	ClassImp(AliITSClusterFinderSPD)
	25
	26	//----------------------------------------------------------
	27	AliITSClusterFinderSPD::AliITSClusterFinderSPD
	28	(AliITSsegmentation seg, TClonesArray digits, TClonesArray *recp)
	29	{
	30	// constructor
	31	fSegmentation=seg;
	32	fDigits=digits;
	33	fClusters=recp;
	34	fNclusters= fClusters->GetEntriesFast();
	35	SetDx();
	36	SetDz();
	37	SetMap();
	38	SetNCells();
	39	}
	40
	41	//_____________________________________________________________________________
	42	AliITSClusterFinderSPD::AliITSClusterFinderSPD()
	43	{
	44	// constructor
	45	fSegmentation=0;
	46	fDigits=0;
	47	fClusters=0;
	48	fNclusters=0;
e8189707	49	fMap=0;
b0f5e3fc	50	SetDx();
b0f5e3fc	51	SetDz();
b0f5e3fc	52	SetNCells();
	53
	54	}
	55
e8189707	56	//_____________________________________________________________________________
	57	AliITSClusterFinderSPD::~AliITSClusterFinderSPD()
	58	{
	59	// destructor
	60	if (fMap) delete fMap;
	61
	62
	63	}
b0f5e3fc	64	//__________________________________________________________________________
	65	AliITSClusterFinderSPD::AliITSClusterFinderSPD(const AliITSClusterFinderSPD &source){
	66	// Copy Constructor
	67	if(&source == this) return;
	68	this->fClusters = source.fClusters ;
	69	this->fNclusters = source.fNclusters ;
	70	this->fMap = source.fMap ;
	71	this->fDz = source.fDz ;
	72	this->fDx = source.fDx ;
	73	this->fMinNCells = source.fMinNCells ;
	74	return;
	75	}
	76
	77	//_________________________________________________________________________
	78	AliITSClusterFinderSPD&
	79	AliITSClusterFinderSPD::operator=(const AliITSClusterFinderSPD &source) {
	80	// Assignment operator
	81	if(&source == this) return *this;
	82	this->fClusters = source.fClusters ;
	83	this->fNclusters = source.fNclusters ;
	84	this->fMap = source.fMap ;
	85	this->fDz = source.fDz ;
	86	this->fDx = source.fDx ;
	87	this->fMinNCells = source.fMinNCells ;
	88	return *this;
	89	}
	90
	91	//_____________________________________________________________________________
	92	void AliITSClusterFinderSPD::SetMap()
	93	{
	94	// set map
a3e16987	95
b0f5e3fc	96	if(!fMap) fMap=new AliITSMapA1(fSegmentation,fDigits);
a3e16987	97
b0f5e3fc	98	}
	99
	100	//_____________________________________________________________________________
	101
	102	void AliITSClusterFinderSPD::Find1DClusters()
	103	{
	104	// Find one dimensional clusters, i.e.
	105	// in r*phi(x) direction for each colunm in z direction
	106
	107	AliITS iTS=(AliITS)gAlice->GetModule("ITS");
	108
	109	// retrieve the parameters
	110	Int_t fNofPixels = fSegmentation->Npz();
	111	Int_t fMaxNofSamples = fSegmentation->Npx();
	112
	113	// read in digits -> do not apply threshold
	114	// signal in fired pixels is always 1
a3e16987	115
b0f5e3fc	116	fMap->FillMap();
	117
	118	Int_t nofFoundClusters = 0;
	119
	120	Int_t k,it,m;
	121	for(k=0;k<fNofPixels;k++) {
	122
	123	Int_t mmax = 10; // a size of the window for the cluster finding
	124
	125	for(it=0;it<fMaxNofSamples;it++) {
	126
	127	Int_t lclx = 0;
	128	Int_t xstart = 0;
	129	Int_t xstop = 0;
	130	Int_t id = 0;
	131	Int_t ilcl =0;
	132
	133	for(m=0;m<mmax;m++) { // find the cluster inside the window
	134	id = it+m;
	135	if(id >= fMaxNofSamples) break; // ! no possible for the fadc
	136
e8189707	137	if(fMap->TestHit(k,id) == kUnused) { // start of the cluster
b0f5e3fc	138	lclx += 1;
	139	if(lclx == 1) xstart = id;
	140
	141	}
	142
e8189707	143	if(lclx > 0 && fMap->TestHit(k,id) == kEmpty) {
b0f5e3fc	144	// end of cluster if a gap exists
	145	xstop = id-1;
	146	ilcl = 1;
	147	break;
	148	}
	149
	150	} // end of m-loop
	151
	152	if(lclx == 0 && ilcl == 0) it = id; // no cluster in the window,
	153	// continue the "it" loop
	154
	155	if(id >= fMaxNofSamples && lclx == 0) break; // the x row finished
	156
	157	if(id < fMaxNofSamples && ilcl == 0 && lclx > 0) {
e8189707	158	// cluster end is outside of the window,
b0f5e3fc	159	mmax += 5; // increase mmax and repeat the cluster
e8189707	160	// finding
b0f5e3fc	161	it -= 1;
	162	}
	163
	164	if(id >= fMaxNofSamples && lclx > 0) { // the x row finished but
e8189707	165	xstop = fMaxNofSamples - 1; // the end cluster exists
b0f5e3fc	166	ilcl = 1;
	167	}
	168
	169	// --- Calculate z and x coordinates for one dimensional clusters
	170
	171	if(ilcl == 1) { // new cluster exists
	172	it = id;
	173	mmax = 10;
	174	nofFoundClusters++;
	175	Float_t clusterCharge = 0.;
b0f5e3fc	176	Float_t zpitch = fSegmentation->Dpz(k+1);
	177	Float_t clusterZ, dummyX;
	178	Int_t dummy=0;
e8189707	179	fSegmentation->GetPadCxz(dummy,k,dummyX,clusterZ);
b0f5e3fc	180	Float_t zstart = clusterZ - 0.5*zpitch;
	181	Float_t zstop = clusterZ + 0.5*zpitch;
	182	Float_t clusterX = 0.;
	183	Int_t xstartfull = xstart;
	184	Int_t xstopfull = xstop;
	185	Int_t clusterSizeX = lclx;
	186	Int_t clusterSizeZ = 1;
	187
	188	Int_t its;
	189	for(its=xstart; its<=xstop; its++) {
	190	Int_t firedpixel=0;
e8189707	191	if (fMap->GetHitIndex(k,its)>=0) firedpixel=1;
b0f5e3fc	192	clusterCharge += firedpixel;
	193	clusterX +=its + 0.5;
	194	}
	195	Float_t fRphiPitch = fSegmentation->Dpx(dummy);
	196	clusterX /= (clusterSizeX/fRphiPitch); // center of gravity for x
	197
	198
	199	//printf("ClusterZ ClusterX %f %f \n",clusterZ, clusterX);
	200
	201	// Int_t nclusters = fClusters->GetEntriesFast();
	202	// cout << nclusters << " clusters" << endl;
	203	// cout<< "Create point"<<endl;
	204
	205	// Write the points (coordinates and some cluster information) to the
	206	// AliITSRawClusterSPD object
	207
	208	AliITSRawClusterSPD *clust = new AliITSRawClusterSPD(clusterZ,clusterX,clusterCharge,clusterSizeZ,clusterSizeX,xstart,xstop,xstartfull,xstopfull,zstart,zstop,k);
	209	// fClusters->Add(point);
	210	iTS->AddCluster(0,clust);
	211	// cout << "Cluster at Ladder: " << fLadder << ", Detector: " <<fDetector<<endl;
	212
	213	// cout<<" end of cluster finding for Z pixel "<<endl;
	214
	215	} // new cluster (ilcl=1)
	216	} // X direction loop (it)
	217	} // Z direction loop (k)
e8189707	218
e8189707	219	//fMap->ClearMap();
b0f5e3fc	220	return;
	221
	222	}
	223
	224	//_____________________________________________________________________________
	225	void AliITSClusterFinderSPD::GroupClusters()
	226	{
	227	// Find two dimensional clusters, i.e. group one dimensional clusters
	228	// into two dimensional ones (go both in x and z directions).
	229
	230	// get number of clusters for this module
	231	Int_t nofClusters = fClusters->GetEntriesFast();
	232	nofClusters -= fNclusters;
b0f5e3fc	233
	234	AliITSRawClusterSPD *clusterI;
	235	AliITSRawClusterSPD *clusterJ;
	236
e8189707	237	Int_t *label=new Int_t[nofClusters];
b0f5e3fc	238	Int_t i,j;
	239	for(i=0; i<nofClusters; i++) label[i] = 0;
	240	for(i=0; i<nofClusters; i++) {
	241	if(label[i] != 0) continue;
	242	for(j=i+1; j<nofClusters; j++) {
	243	if(label[j] != 0) continue;
	244	clusterI = (AliITSRawClusterSPD*) fClusters->At(i);
	245	clusterJ = (AliITSRawClusterSPD*) fClusters->At(j);
	246	Bool_t pair = clusterI->Brother(clusterJ,fDz,fDx);
	247	if(pair) {
	248
	249	// if((clusterI->XStop() == clusterJ->XStart()-1)\|\|(clusterI->XStart()==clusterJ->XStop()+1)) cout<<"!! Diagonal cluster"<<endl;
	250	/*
	251	cout << "clusters " << i << "," << j << " before grouping" << endl;
e8189707	252	clusterI->PrintInfo();
e8189707	253	clusterJ->PrintInfo();
b0f5e3fc	254	*/
	255	clusterI->Add(clusterJ);
	256	// cout << "remove cluster " << j << endl;
	257	label[j] = 1;
	258	fClusters->RemoveAt(j);
	259	/*
	260	cout << "cluster " << i << " after grouping" << endl;
e8189707	261	clusterI->PrintInfo();
b0f5e3fc	262	*/
	263	} // pair
	264	} // J clusters
	265	label[i] = 1;
	266	} // I clusters
	267	fClusters->Compress();
a3e16987	268	// Int_t totalNofClusters = fClusters->GetEntriesFast();
a3e16987	269	// cout << " Nomber of clusters at the group end ="<< totalNofClusters<<endl;
b0f5e3fc	270
dccfe216	271	delete [] label;
e8189707	272
b0f5e3fc	273	return;
	274
	275
	276	}
	277	//_____________________________________________________________________________
	278
a3e16987	279	void AliITSClusterFinderSPD::TracksInCluster()
	280	{
	281
	282	// Find tracks creating one cluster
	283
	284	// get number of clusters for this module
	285	Int_t nofClusters = fClusters->GetEntriesFast();
	286	nofClusters -= fNclusters;
	287
	288	Int_t i, ix, iz, jx, jz, xstart, xstop, zstart, zstop, nclx, nclz;
	289	// Int_t signal, track0, track1, track2;
d4e03339	290	const Int_t trmax = 100;
a3e16987	291	Int_t cltracks[trmax], itr, tracki, ii, is, js, ie, ntr, tr0, tr1, tr2;
	292
	293	for(i=0; i<nofClusters; i++) {
	294	ii = 0;
	295	memset(cltracks,-1,sizeof(int)*trmax);
	296	tr0=tr1=tr2=-1;
	297
	298	AliITSRawClusterSPD clusterI = (AliITSRawClusterSPD) fClusters->At(i);
	299
	300	nclx = clusterI->NclX();
	301	nclz = clusterI->NclZ();
	302	xstart = clusterI->XStartf();
	303	xstop = clusterI->XStopf();
	304	zstart = clusterI->Zend()-nclz+1;
	305	zstop = clusterI->Zend();
	306
	307	Int_t ind;
	308
	309	for(iz=0; iz<nclz; iz++) {
	310	jz = zstart + iz;
	311	for(ix=0; ix<nclx; ix++) {
	312	jx = xstart + ix;
	313	ind = fMap->GetHitIndex(jz,jx);
	314	if(ind == 0 && iz >= 0 && ix > 0) {
	315	continue;
	316	}
	317	if(ind == 0 && iz > 0 && ix >= 0) {
	318	continue;
	319	}
	320	if(ind == 0 && iz == 0 && ix == 0 && i > 0) {
	321	continue;
	322	}
	323
	324	AliITSdigitSPD dig = (AliITSdigitSPD)fMap->GetHit(jz,jx);
	325	/*
	326	signal=dig->fSignal;
	327	track0=dig->fTracks[0];
	328	track1=dig->fTracks[1];
	329	track2=dig->fTracks[2];
	330	*/
	331	for(itr=0; itr<3; itr++) {
	332	tracki = dig->fTracks[itr];
	333	if(tracki >= 0) {
	334	ii += 1;
	335	cltracks[ii-1] = tracki;
	336	}
	337	}
	338	} // ix pixel
	339	} // iz pixel
	340
	341	for(is=0; is<trmax; is++) {
	342	if(cltracks[is]<0) continue;
	343	for(js=is+1; js<trmax; js++) {
	344	if(cltracks[js]<0) continue;
	345	if(cltracks[js]==cltracks[is]) cltracks[js]=-5;
	346	}
	347	}
	348
	349	ntr = 0;
	350	for(ie=0; ie<trmax; ie++) {
	351	if(cltracks[ie] >= 0) {
	352	ntr=ntr+1;
	353	if(ntr==1) tr0=cltracks[ie];
	354	if(ntr==2) tr1=cltracks[ie];
355	if(ntr==3) tr2=cltracks[ie];
356	}
357	}
358	// if delta ray only
359	if(ntr == 0) ntr = 1;
360
361	clusterI->SetNTracks(ntr);
362	clusterI->SetTracks(tr0,tr1,tr2);
363
364	} // I cluster
365
366	}
367	//_____________________________________________________________________________
368
b0f5e3fc	369	void AliITSClusterFinderSPD::GetRecPoints()
	370	{
	371	// get rec points
	372	AliITS iTS=(AliITS)gAlice->GetModule("ITS");
	373
	374	// get number of clusters for this module
	375	Int_t nofClusters = fClusters->GetEntriesFast();
	376	nofClusters -= fNclusters;
b0f5e3fc	377	const Float_t kconv = 1.0e-4;
	378	const Float_t kRMSx = 12.0*kconv; // microns -> cm ITS TDR Table 1.3
	379	const Float_t kRMSz = 70.0*kconv; // microns -> cm ITS TDR Table 1.3
	380
e8189707	381	Float_t spdLength = fSegmentation->Dz();
	382	Float_t spdWidth = fSegmentation->Dx();
	383
a3e16987	384	Int_t i;
	385	Int_t track0, track1, track2;
	386
b0f5e3fc	387	for(i=0; i<nofClusters; i++) {
a3e16987	388
b0f5e3fc	389	AliITSRawClusterSPD clusterI = (AliITSRawClusterSPD) fClusters->At(i);
a3e16987	390	clusterI->GetTracks(track0, track1, track2);
b0f5e3fc	391	AliITSRecPoint rnew;
a3e16987	392
e8189707	393	rnew.SetX((clusterI->X() - spdWidth/2)*kconv);
e8189707	394	rnew.SetZ((clusterI->Z() - spdLength/2)*kconv);
b0f5e3fc	395	rnew.SetQ(1.);
	396	rnew.SetdEdX(0.);
	397	rnew.SetSigmaX2(kRMSx*kRMSx);
	398	rnew.SetSigmaZ2(kRMSz*kRMSz);
a3e16987	399	rnew.fTracks[0]=track0;
	400	rnew.fTracks[1]=track1;
	401	rnew.fTracks[2]=track2;
b0f5e3fc	402	iTS->AddRecPoint(rnew);
b0f5e3fc	403	} // I clusters
e8189707	404
e8189707	405	fMap->ClearMap();
b0f5e3fc	406
	407	}
	408	//_____________________________________________________________________________
	409
	410	void AliITSClusterFinderSPD::FindRawClusters()
	411	{
	412	// find raw clusters
	413	Find1DClusters();
	414	GroupClusters();
a3e16987	415	TracksInCluster();
b0f5e3fc	416	GetRecPoints();
e8189707	417
b0f5e3fc	418	}
b0f5e3fc	419