/************************************************************************** * 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. * **************************************************************************/ /* $Id$ */ /* $Log: 1 October 2000. Yuri Kharlov: AreNeighbours() PPSD upper layer is considered if number of layers>1 18 October 2000. Yuri Kharlov: AliPHOSClusterizerv1() CPV clusterizing parameters added MakeClusters() After first PPSD digit remove EMC digits only once */ //_________________________________________________________________________ // Implementation version 1 of the clusterization algorithm // //*-- Author: Yves Schutz (SUBATECH) ////////////////////////////////////////////////////////////////////////////// // --- ROOT system --- #include "TMath.h" // --- Standard library --- #include // --- AliRoot header files --- #include "AliPHOSClusterizerv1.h" #include "AliPHOSDigit.h" #include "AliPHOSEmcRecPoint.h" #include "AliPHOSPpsdRecPoint.h" #include "AliPHOSv0.h" #include "AliRun.h" ClassImp(AliPHOSClusterizerv1) //____________________________________________________________________________ AliPHOSClusterizerv1::AliPHOSClusterizerv1() { // default ctor (to be used) fA = 0.; fB = 0.01 ; fGeom = AliPHOSGeometry::GetInstance(); fNumberOfEmcClusters = 0 ; fNumberOfPpsdClusters = 0 ; fEmcClusteringThreshold = 0.1; fEmcEnergyThreshold = 0.01; fPpsdClusteringThreshold = 0.0; fPpsdEnergyThreshold = 0.1; fW0 = 4.5 ; fLocMaxCut = 0.06 ; fW0CPV = 4.5 ; fLocMaxCutCPV = 0.06 ; } //____________________________________________________________________________ Int_t AliPHOSClusterizerv1::AreNeighbours(AliPHOSDigit * d1, AliPHOSDigit * d2) { // Gives the neighbourness of two digits = 0 are not neighbour but continue searching // = 1 are neighbour // = 2 are not neighbour but do not continue searching // neighbours are defined as digits having at least common vertex // The order of d1 and d2 is important: first (d1) should be a digit already in a cluster // which is compared to a digit (d2) not yet in a cluster Int_t rv = 0 ; Int_t relid1[4] ; fGeom->AbsToRelNumbering(d1->GetId(), relid1) ; Int_t relid2[4] ; fGeom->AbsToRelNumbering(d2->GetId(), relid2) ; if ( (relid1[0] == relid2[0]) && (relid1[1]==relid2[1]) ) { // inside the same PHOS module and the same PPSD Module Int_t rowdiff = TMath::Abs( relid1[2] - relid2[2] ) ; Int_t coldiff = TMath::Abs( relid1[3] - relid2[3] ) ; if (( coldiff <= 1 ) && ( rowdiff <= 1 )){ rv = 1 ; } else { if((relid2[2] > relid1[2]) && (relid2[3] > relid1[3]+1)) rv = 2; // Difference in row numbers is too large to look further } } else { if( (relid1[0] < relid2[0]) || (relid1[1] < relid2[1]) ) rv=2 ; } //Do NOT clusterize upper PPSD if(fGeom->GetNumberOfCPVLayers() > 1 && relid1[1] > 0 && relid1[1] < fGeom->GetNumberOfPadsPhi()*fGeom->GetNumberOfPadsPhi() ) rv = 2 ; return rv ; } //____________________________________________________________________________ void AliPHOSClusterizerv1::FillandSort(const DigitsList * dl, TObjArray * tl) { // Copies the digits with energy above thershold and sorts the list // according to increasing Id number Int_t relid[4] ; TIter next(dl) ; AliPHOSDigit * digit ; while ( (digit = (AliPHOSDigit *)next()) ) { // cout << " clusterizerv1 " << endl ; // int nprim = digit->GetNprimary() ; // int * aprim = digit->GetPrimary() ; // for ( int ii = 0 ; ii < nprim ; ii++) // cout << ii << " prim = " << aprim[ii] << endl ; Int_t id = digit->GetId() ; Float_t ene = Calibrate(digit->GetAmp()) ; fGeom->AbsToRelNumbering(id, relid) ; if(relid[1]==0){ // EMC if ( ene > fEmcEnergyThreshold ) tl->Add(digit) ; } else { //Ppsd if ( ene > fPpsdEnergyThreshold ) tl->Add(digit) ; } } tl->Sort() ; } //____________________________________________________________________________ void AliPHOSClusterizerv1:: GetNumberOfClustersFound(Int_t * numb) { // Fills numb with the number of EMC (numb[0]) clusters found // PPSD (numb[1]) clusters found numb[0] = fNumberOfEmcClusters ; numb[1] = fNumberOfPpsdClusters ; } //____________________________________________________________________________ Bool_t AliPHOSClusterizerv1::IsInEmc(AliPHOSDigit * digit) { // Tells if (true) or not (false) the digit is in a PHOS-EMC module Bool_t rv = kFALSE ; Int_t relid[4] ; fGeom->AbsToRelNumbering(digit->GetId(), relid) ; if ( relid[1] == 0 ) rv = kTRUE; return rv ; } //____________________________________________________________________________ void AliPHOSClusterizerv1::MakeClusters(const DigitsList * dl, AliPHOSRecPoint::RecPointsList * emcl, AliPHOSRecPoint::RecPointsList * ppsdl) { // Steering method to construct the clusters stored in a list of Reconstructed Points // A cluster is defined as a list of neighbour digits fNumberOfEmcClusters = 0 ; fNumberOfPpsdClusters = 0 ; // Fill and sort the working digits list TObjArray tempodigitslist( dl->GetEntries() ) ; FillandSort(dl, &tempodigitslist) ; // Clusterization starts TIter nextdigit(&tempodigitslist) ; AliPHOSDigit * digit ; Bool_t notremoved = kTRUE ; while ( (digit = (AliPHOSDigit *)nextdigit()) ) { // scan over the list of digits AliPHOSRecPoint * clu ; AliPHOSDigit ** clusterdigitslist = new AliPHOSDigit*[dl->GetEntries()] ; Int_t index ; if (( ( IsInEmc(digit) ) && ( Calibrate(digit->GetAmp() ) > fEmcClusteringThreshold ) ) || ( ( !IsInEmc(digit) ) && ( Calibrate(digit->GetAmp() ) > fPpsdClusteringThreshold ) ) ) { Int_t iDigitInCluster = 0 ; if ( IsInEmc(digit) ) { // start a new EMC RecPoint if(fNumberOfEmcClusters >= emcl->GetSize()) emcl->Expand(2*fNumberOfEmcClusters+1) ; (*emcl)[fNumberOfEmcClusters] = new AliPHOSEmcRecPoint(fW0, fLocMaxCut) ; clu = (AliPHOSEmcRecPoint *) emcl->At(fNumberOfEmcClusters) ; fNumberOfEmcClusters++ ; clu->AddDigit(*digit, Calibrate(digit->GetAmp())) ; clusterdigitslist[iDigitInCluster] = digit ; iDigitInCluster++ ; tempodigitslist.Remove(digit) ; } else { // start a new PPSD cluster if(fNumberOfPpsdClusters >= ppsdl->GetSize()) ppsdl->Expand(2*fNumberOfPpsdClusters+1); if (strcmp(fGeom->GetName(),"GPS2") == 0) { (*ppsdl)[fNumberOfPpsdClusters] = new AliPHOSPpsdRecPoint() ; clu = (AliPHOSPpsdRecPoint *) ppsdl->At(fNumberOfPpsdClusters) ; } else if (strcmp(fGeom->GetName(),"IHEP") == 0) { (*ppsdl)[fNumberOfPpsdClusters] = new AliPHOSEmcRecPoint(fW0CPV, fLocMaxCutCPV) ; clu = (AliPHOSEmcRecPoint *) ppsdl->At(fNumberOfPpsdClusters) ; } fNumberOfPpsdClusters++ ; clu->AddDigit(*digit, Calibrate(digit->GetAmp()) ) ; clusterdigitslist[iDigitInCluster] = digit ; iDigitInCluster++ ; tempodigitslist.Remove(digit) ; nextdigit.Reset() ; // Here we remove resting EMC digits, which cannot make cluster if( notremoved ) { while( ( digit = (AliPHOSDigit *)nextdigit() ) ) { if( IsInEmc(digit) ) tempodigitslist.Remove(digit) ; else break ; } notremoved = kFALSE ; } } // else nextdigit.Reset() ; AliPHOSDigit * digitN ; index = 0 ; while (index < iDigitInCluster){ // scan over digits already in cluster digit = clusterdigitslist[index] ; index++ ; while ( (digitN = (AliPHOSDigit *)nextdigit()) ) { // scan over the reduced list of digits Int_t ineb = AreNeighbours(digit, digitN); // call (digit,digitN) in THAT oder !!!!! switch (ineb ) { case 0 : // not a neighbour break ; case 1 : // are neighbours clu->AddDigit(*digitN, Calibrate( digitN->GetAmp() ) ) ; clusterdigitslist[iDigitInCluster] = digitN ; iDigitInCluster++ ; tempodigitslist.Remove(digitN) ; break ; case 2 : // too far from each other goto endofloop; } // switch } // while digitN endofloop: ; nextdigit.Reset() ; } // loop over cluster } //below energy theshold delete[] clusterdigitslist ; } // while digit tempodigitslist.Clear() ; ppsdl->Sort() ; Int_t index ; for(index = 0; index < ppsdl->GetEntries(); index++) ((AliPHOSPpsdRecPoint *)ppsdl->At(index))->SetIndexInList(index) ; } //____________________________________________________________________________ void AliPHOSClusterizerv1::PrintParameters() { // Print the energy thresholds cout << "PHOS Clusterizer version 1 :" << endl << " EMC Clustering threshold = " << fEmcClusteringThreshold << endl << " EMC Energy threshold = " << fEmcEnergyThreshold << endl << " PPSD Clustering threshold = " << fPpsdClusteringThreshold << endl << " PPSD Energy threshold = " << fPpsdEnergyThreshold << endl ; }