* provided "as is" without express or implied warranty. *
**************************************************************************/
-#include <iostream.h>
+// **************************************************************************
+// * The package was revised and changed by Boris Batiounia in the time *
+// * period of March - June 2001 *
+// **************************************************************************/
+//
+//#include <Riostream.h>
#include <TArrayI.h>
-#include "AliRun.h"
-#include "AliITS.h"
-#include "AliITSdigit.h"
-#include "AliITSRawCluster.h"
-#include "AliITSRecPoint.h"
-#include "AliITSMapA1.h"
+
+//#include "AliRun.h"
+//#include "AliITS.h"
#include "AliITSClusterFinderSSD.h"
+#include "AliITSDetTypeRec.h"
+#include "AliITSMapA1.h"
+#include "AliITSRawClusterSSD.h"
+#include "AliITSRecPoint.h"
+#include "AliITSdigitSSD.h"
#include "AliITSclusterSSD.h"
#include "AliITSpackageSSD.h"
-#include "AliITSsegmentation.h"
-#include "AliITSgeom.h"
#include "AliITSsegmentationSSD.h"
+//#include "AliITSgeom.h"
+#include "AliITSCalibrationSSD.h"
+#include "AliLog.h"
const Bool_t AliITSClusterFinderSSD::fgkSIDEP=kTRUE;
const Bool_t AliITSClusterFinderSSD::fgkSIDEN=kFALSE;
-const Int_t debug=0;
+const Int_t AliITSClusterFinderSSD::fgkNoiseThreshold=5;
+//const Int_t debug=0;
ClassImp(AliITSClusterFinderSSD)
+
+ //____________________________________________________________________
+ //
+ // Constructor
+ //______________________________________________________________________
+ AliITSClusterFinderSSD::AliITSClusterFinderSSD():
+AliITSClusterFinder(),
+fClusterP(0),
+fNClusterP(0),
+fClusterN(0),
+fNClusterN(0),
+fPackages(0),
+fNPackages(0),
+fDigitsIndexP(0),
+fNDigitsP(0),
+fDigitsIndexN(0),
+fNDigitsN(0),
+fPitch(0.0),
+fTanP(0.0),
+fTanN(0.0),
+fPNsignalRatio(0.0),
+fSFF(0),
+fSFB(0){
+ //Default constructor
+}
//______________________________________________________________________
-//
-// Constructor
-//______________________________________________________________________
-//
-
+AliITSClusterFinderSSD::AliITSClusterFinderSSD(AliITSDetTypeRec* dettyp,
+ TClonesArray *digits):
+AliITSClusterFinder(dettyp,digits),
+fClusterP(0),
+fNClusterP(0),
+fClusterN(0),
+fNClusterN(0),
+fPackages(0),
+fNPackages(0),
+fDigitsIndexP(0),
+fNDigitsP(0),
+fDigitsIndexN(0),
+fNDigitsN(0),
+fPitch(0.0),
+fTanP(0.0),
+fTanN(0.0),
+fPNsignalRatio(0.0),
+fSFF(0),
+fSFB(0){
+ //Standard constructor
+
+ SetDigits(digits);
+ SetMap(new AliITSMapA1(GetSeg(),Digits()));
+ fClusterP = new TClonesArray ("AliITSclusterSSD",200);
+ fNClusterP = 0;
+ fClusterN = new TClonesArray ("AliITSclusterSSD",200);
+ fNClusterN = 0;
+ fPackages = new TClonesArray ("AliITSpackageSSD",200); //packages
+ fNPackages = 0;
+ fDigitsIndexP = new TArrayI(800);
+ fNDigitsP = 0;
+ fDigitsIndexN = new TArrayI(800);
+ fNDigitsN = 0;
+ fPitch = GetSeg()->Dpx(0);
+ fPNsignalRatio= 7./8.; // warning: hard-wired number
+}
-AliITSClusterFinderSSD::AliITSClusterFinderSSD(AliITSsegmentation *seg,
- TClonesArray *digits){
-//Standard constructor
+//______________________________________________________________________
+AliITSClusterFinderSSD::AliITSClusterFinderSSD(AliITSDetTypeRec* dettyp):
+AliITSClusterFinder(dettyp),
+fClusterP(0),
+fNClusterP(0),
+fClusterN(0),
+fNClusterN(0),
+fPackages(0),
+fNPackages(0),
+fDigitsIndexP(0),
+fNDigitsP(0),
+fDigitsIndexN(0),
+fNDigitsN(0),
+fPitch(0.0),
+fTanP(0.0),
+fTanN(0.0),
+fPNsignalRatio(0.0),
+fSFF(0),
+fSFB(0){
+ //Standard constructor
+
+ fClusterP = new TClonesArray ("AliITSclusterSSD",200);
+ fNClusterP = 0;
+ fClusterN = new TClonesArray ("AliITSclusterSSD",200);
+ fNClusterN = 0;
+ fPackages = new TClonesArray ("AliITSpackageSSD",200); //packages
+ fNPackages = 0;
+ fDigitsIndexP = new TArrayI(800);
+ fNDigitsP = 0;
+ fDigitsIndexN = new TArrayI(800);
+ fNDigitsN = 0;
+ fPitch = GetSeg()->Dpx(0);
+ fPNsignalRatio= 7./8.; // warning: hard-wired number
+}
- fSegmentation=seg;
- fDigits=digits;
-
- fMap = new AliITSMapA1(fSegmentation,fDigits);
+//______________________________________________________________________
+AliITSClusterFinderSSD::~AliITSClusterFinderSSD(){
+ // Default destructor
- fITS=(AliITS*)gAlice->GetModule("ITS");
-
- fClusterP = new TClonesArray ("AliITSclusterSSD",200);
- fNClusterP =0;
-
- fClusterN= new TClonesArray ("AliITSclusterSSD",200);
- fNClusterN =0;
-
- fPackages = new TClonesArray ("AliITSpackageSSD",200); //packages
- fNPackages = 0;
-
- fDigitsIndexP = new TArrayI(300);
- fNDigitsP = 0;
-
- fDigitsIndexN = new TArrayI(300);
- fNDigitsN = 0;
-
- fPitch = fSegmentation->Dpx(0);
- fPNsignalRatio=7./8.; // warning: hard-wired number
-
+ delete fClusterP;
+ delete fClusterN;
+ delete fPackages;
+ delete fDigitsIndexP;
+ delete fDigitsIndexN;
+ delete fMap;
}
-//----------------------------------------------------------------------
-AliITSClusterFinderSSD::~AliITSClusterFinderSSD() {
-// Default destructor
-
- delete fClusterP;
- delete fClusterN;
- delete fPackages;
- delete fDigitsIndexP;
- delete fDigitsIndexN;
- delete fMap;
-}
-//----------------------------------------------------------------------
+//______________________________________________________________________
void AliITSClusterFinderSSD::InitReconstruction(){
-// initialization of the cluster finder
- register Int_t i; //iterator
-
- for (i=0;i<fNClusterP;i++){
- fClusterP->RemoveAt(i);
- } // end for i
- fNClusterP =0 ;
- for (i=0;i<fNClusterN;i++){
- fClusterN->RemoveAt(i);
- } // end for i
+ // initialization of the cluster finder
+
+ register Int_t i; //iterator
+
+ for (i=0;i<fNClusterP;i++) fClusterP->RemoveAt(i);
+ fNClusterP =0;
+ for (i=0;i<fNClusterN;i++) fClusterN->RemoveAt(i);
fNClusterN=0;
-
- for (i=0;i<fNPackages;i++){
- fPackages->RemoveAt(i);
- } // end for i
-
+ for (i=0;i<fNPackages;i++) fPackages->RemoveAt(i);
fNPackages = 0;
fNDigitsP = 0;
fNDigitsN = 0;
-
- Float_t StereoP,StereoN;
- fSegmentation->Angles(StereoP,StereoN);
-
- CalcStepFactor (StereoP,StereoN);
-
- if (debug) cout<<"fSFF = "<<fSFF<<" fSFB = "<<fSFB<<"\n";
+ Float_t stereoP,stereoN;
+ //fSegmentation->Angles(stereoP,stereoN);
+ GetSeg()->Angles(stereoP,stereoN);
+ CalcStepFactor(stereoP,stereoN);
+ // if (debug) cout<<"fSFF = "<<fSFF<<" fSFB = "<<fSFB<<"\n";
}
-//----------------------------------------------------------------------
+//______________________________________________________________________
void AliITSClusterFinderSSD::FindRawClusters(Int_t module){
-// This function findes out all clusters belonging to one module
-// 1. Zeroes all space after previous module reconstruction
-// 2. Finds all neighbouring digits, create clusters
-// 3. If necesery, resolves for each group of neighbouring digits
-// how many clusters creates it.
-// 4. Colculate the x and z coordinate
+ // This function findes out all clusters belonging to one module
+ // 1. Zeroes all space after previous module reconstruction
+ // 2. Finds all neighbouring digits, create clusters
+ // 3. If necesery, resolves for each group of neighbouring digits
+ // how many clusters creates it.
+ // 4. Colculate the x and z coordinate
Int_t lay, lad, detect;
- AliITS *aliITS = (AliITS*)gAlice->GetModule("ITS");
- AliITSgeom *geom = aliITS->GetITSgeom();
- geom->GetModuleId(module,lay, lad, detect);
- if ( lay == 6 )((AliITSsegmentationSSD*)fSegmentation)->SetLayer(6);
- if ( lay == 5 )((AliITSsegmentationSSD*)fSegmentation)->SetLayer(5);
-
+
+ //cout<<"clusterfinder: this is module "<<module<<endl;
+
+ // AliITSgeom *geom = fITS->GetITSgeom();
+
+ if(!fDetTypeRec->GetITSgeom()) {
+ Error("FindRawClusters","ITS geom is null!");
+ return;
+ }
+
+ SetModule(module);
+ fDetTypeRec->GetITSgeom()->GetModuleId(GetModule(),lay, lad, detect);
+ // geom->GetModuleId(module,lay, lad, detect);
+
+ //cout<<"layer = "<<lay<<endl;
+
+ if ( lay == 6 ) ((AliITSsegmentationSSD*)GetSeg())->SetLayer(6);
+ if ( lay == 5 ) ((AliITSsegmentationSSD*)GetSeg())->SetLayer(5);
+
+
InitReconstruction(); //ad. 1
fMap->FillMap();
+
FillDigitsIndex();
+ if ( (fNDigitsP==0 ) || (fNDigitsN == 0 )) return;
+
SortDigits();
- FindNeighbouringDigits(); //ad. 2
+ FindNeighbouringDigits(module); //ad. 2
+
//SeparateOverlappedClusters(); //ad. 3
ClustersToPackages(); //ad. 4
- AliITSRecPoint rnew;
+
fMap->ClearMap();
-}
-//----------------------------------------------------------------------
-void AliITSClusterFinderSSD::FindNeighbouringDigits(){
-//If there are any digits on this side, create 1st Cluster,
-// add to it this digit, and increment number of clusters
- register Int_t i;
- if ((fNDigitsP>0 ) && (fNDigitsN > 0 )) {
+}
+//______________________________________________________________________
+void AliITSClusterFinderSSD::FindNeighbouringDigits(Int_t module){
+ //If there are any digits on this side, create 1st Cluster,
+ // add to it this digit, and increment number of clusters
- Int_t currentstripNo;
- Int_t *dbuffer = new Int_t [300]; //buffer for strip numbers
- Int_t dnumber; //curent number of digits in buffer
- TArrayI &lDigitsIndexP = *fDigitsIndexP;
- TArrayI &lDigitsIndexN = *fDigitsIndexN;
- TObjArray &lDigits = *(Digits());
- TClonesArray &lClusterP = *fClusterP;
- TClonesArray &lClusterN = *fClusterN;
+ register Int_t i,j;
+ Int_t flag=0;
- //process P side
+ //if ( (fNDigitsP==0 ) || (fNDigitsN == 0 )) return;
+
+ Int_t currentstripNo;
+ Int_t *dbuffer = new Int_t [800]; //buffer for strip numbers
+ Int_t dnumber; //curent number of digits in buffer
+
+ TArrayI &lDigitsIndexP = *fDigitsIndexP;
+ TArrayI &lDigitsIndexN = *fDigitsIndexN;
+
+ TObjArray &lDigits = *(Digits());
+
+ TClonesArray &lClusterP = *fClusterP;
+ TClonesArray &lClusterN = *fClusterN;
+
+ //process P side
+ dnumber = 1;
+ dbuffer[0]=lDigitsIndexP[0];
+
+ //If next digit is a neigh. of previous, adds to last clust. this digit
+ /*
+ cout<<"----------------------------------------------------------------"<<endl;
+ cout<<"module="<<module<<" , # of Pdigits="<<fNDigitsP<<" , # of Ndigits="<<fNDigitsN<<endl;
+
+ cout<<" Pside"<<endl;
+ cout<<" "<<((AliITSdigitSSD*)lDigits[lDigitsIndexP[0]])->GetStripNumber()<<" "<<
+ ((AliITSdigitSSD*)lDigits[lDigitsIndexP[0]])->GetSignal()<<endl;
+ */
+
+ for (i=1; i<fNDigitsP; i++) {
+
+ //reads new digit
+ currentstripNo = ((AliITSdigitSSD*)lDigits[lDigitsIndexP[i]])->GetStripNumber();
+ // cout<<" "<<currentstripNo<<" "<<((AliITSdigitSSD*)lDigits[lDigitsIndexP[i]])->GetSignal()<<endl;
+
+ if((((AliITSdigitSSD*)lDigits[lDigitsIndexP[i-1]])->GetStripNumber()) == (currentstripNo-1) )
+ dbuffer[dnumber++]=lDigitsIndexP[i];
+
+ else{
+
+ // check signal
+ for(j=0;j<dnumber;j++) {
+
+ if( (((AliITSdigitSSD*)lDigits[dbuffer[j]])->GetSignal())
+ > fgkNoiseThreshold* ((AliITSCalibrationSSD*)GetResp(module))->
+ GetNoiseP( ((AliITSdigitSSD*)lDigits[dbuffer[j]])->GetStripNumber()) )
+ flag+=1;
+
+ }
+
+ //if(flag==dnumber) {
+ if(flag>0) {
+ //create a new one side cluster
+
+ // cout<<" new cluster with "<<dnumber<<" digits"<<endl;
+
+ new(lClusterP[fNClusterP++]) AliITSclusterSSD(dnumber,dbuffer,
+ Digits(),
+ fgkSIDEP);
+
+ flag=0;
+ }
+
+ flag=0;
+ dbuffer[0]=lDigitsIndexP[i];
dnumber = 1;
- dbuffer[0]=lDigitsIndexP[0];
- // If next digit is a neighbour of previous, adds to last cluster
- // this digit
- for (i=1; i<fNDigitsP; i++) {
- //reads new digit
- currentstripNo = ((AliITSdigitSSD*)lDigits[lDigitsIndexP[i]])->
- GetStripNumber();
- //check if it is a neighbour of a previous one
- if((((AliITSdigitSSD*)lDigits[lDigitsIndexP[i-1]])->
- GetStripNumber()) == (currentstripNo-1) ){
- dbuffer[dnumber++]=lDigitsIndexP[i];
- }else{
- //create a new one side cluster
- new(lClusterP[fNClusterP++]) AliITSclusterSSD(dnumber,
- dbuffer,Digits(),fgkSIDEP);
- dbuffer[0]=lDigitsIndexP[i];
- dnumber = 1;
- } // end if
- } // end loop over fNDigitsP
- new(lClusterP[fNClusterP++]) AliITSclusterSSD(dnumber,dbuffer,
- Digits(),fgkSIDEP);
- //process N side
- //for comments, see above
+
+ } // end if else
+
+ } // end loop over fNDigitsP
+
+ // check signal
+ for(j=0;j<dnumber;j++) {
+
+ if( (((AliITSdigitSSD*)lDigits[dbuffer[j]])->GetSignal())
+ > fgkNoiseThreshold*((AliITSCalibrationSSD*)GetResp(module))->
+ GetNoiseP( ((AliITSdigitSSD*)lDigits[dbuffer[j]])->GetStripNumber()) )
+ flag+=1;
+
+ }
+
+ //if(flag==dnumber) {
+ if(flag>0) {
+ //create a new one side cluster
+
+ // cout<<" new cluster with "<<dnumber<<" digits"<<endl;
+
+ new(lClusterP[fNClusterP++]) AliITSclusterSSD(dnumber,dbuffer,
+ Digits(),
+ fgkSIDEP);
+
+ flag=0;
+ }
+
+ flag=0;
+
+ //process N side
+ //for comments, see above
+ dnumber = 1;
+ dbuffer[0]=lDigitsIndexN[0];
+ //If next digit is a neigh. of previous, adds to last clust. this digit
+
+ // cout<<" Nside"<<endl;
+ // cout<<" "<<((AliITSdigitSSD*)lDigits[lDigitsIndexN[0]])->GetStripNumber()<<" "<<
+ // ((AliITSdigitSSD*)lDigits[lDigitsIndexN[0]])->GetSignal()<<endl;
+
+ for (i=1; i<fNDigitsN; i++) {
+ currentstripNo = ((AliITSdigitSSD*)(lDigits[lDigitsIndexN[i]]))->GetStripNumber();
+ // cout<<" "<<currentstripNo<<" "<<((AliITSdigitSSD*)lDigits[lDigitsIndexN[i]])->GetSignal()<<endl;
+
+ if ( (((AliITSdigitSSD*)lDigits[lDigitsIndexN[i-1]])->GetStripNumber()) == (currentstripNo-1) )
+ dbuffer[dnumber++]=lDigitsIndexN[i];
+
+ else {
+
+ // check signal
+ for(j=0;j<dnumber;j++) {
+
+ if( (((AliITSdigitSSD*)lDigits[dbuffer[j]])->GetSignal())
+ > fgkNoiseThreshold*((AliITSCalibrationSSD*)GetResp(module))->
+ GetNoiseN( ((AliITSdigitSSD*)lDigits[dbuffer[j]])->GetStripNumber()) )
+ flag+=1;
+
+ }
+
+ //if(flag==dnumber) {
+ if(flag>0) {
+ //create a new one side cluster
+
+ // cout<<" new cluster with "<<dnumber<<" digits"<<endl;
+
+ new(lClusterN[fNClusterN++]) AliITSclusterSSD(dnumber,dbuffer,
+ Digits(),
+ fgkSIDEN);
+
+ flag=0;
+ }
+
+ flag=0;
+ dbuffer[0]=lDigitsIndexN[i];
dnumber = 1;
- dbuffer[0]=lDigitsIndexN[0];
- // If next digit is a neighbour of previous, adds to last cluster
- // this digit
- for (i=1; i<fNDigitsN; i++) {
- currentstripNo = ((AliITSdigitSSD*)(lDigits[lDigitsIndexN[i]]))->
- GetStripNumber();
- if ( (((AliITSdigitSSD*)lDigits[lDigitsIndexN[i-1]])->
- GetStripNumber()) == (currentstripNo-1) ){
- dbuffer[dnumber++]=lDigitsIndexN[i];
- }else{
- new(lClusterN[fNClusterN++]) AliITSclusterSSD(dnumber,dbuffer,
- Digits(),fgkSIDEN);
- dbuffer[0]=lDigitsIndexN[i];
- dnumber = 1;
- } // end if
- } // end loop over fNDigitsN
- new(lClusterN[fNClusterN++]) AliITSclusterSSD(dnumber,dbuffer,
- Digits(),fgkSIDEN);
- delete [] dbuffer;
- } // end condition on NDigits
-
- if (debug) cout<<"\n Found clusters: fNClusterP = "<<fNClusterP<<
- " fNClusterN ="<<fNClusterN<<"\n";
+ } // end if else
+ } // end loop over fNDigitsN
+
+ // check signal
+ for(j=0;j<dnumber;j++) {
+
+ if( (((AliITSdigitSSD*)lDigits[dbuffer[j]])->GetSignal())
+ > fgkNoiseThreshold*((AliITSCalibrationSSD*)GetResp(module))->
+ GetNoiseN( ((AliITSdigitSSD*)lDigits[dbuffer[j]])->GetStripNumber()) )
+ flag+=1;
+
+ }
+
+ //if(flag==dnumber) {
+ if(flag>0) {
+ //create a new one side cluster
+
+ // cout<<" new cluster with "<<dnumber<<" digits"<<endl;
+
+ new(lClusterN[fNClusterN++]) AliITSclusterSSD(dnumber,dbuffer,
+ Digits(),
+ fgkSIDEN);
+
+ flag=0;
+ }
+
+ flag=0;
+ delete [] dbuffer;
+
+ // if (debug) cout<<"\n Found clusters: fNClusterP = "<<fNClusterP
+ // <<" fNClusterN ="<<fNClusterN<<"\n";
}
-//----------------------------------------------------------------------
+//______________________________________________________________________
void AliITSClusterFinderSSD::SeparateOverlappedClusters(){
-// overlapped clusters separation
+ // overlapped clusters separation
register Int_t i; //iterator
- Float_t factor=0.75; // How many percent must be lower signal
- // on the middle one digit
- // from its neighbours
- Int_t signal0; //signal on strip before the current one
- Int_t signal1; //signal on the current one signal
- Int_t signal2; //signal on the strip after the current one
- TArrayI *splitlist; // List of splits
- Int_t numerofsplits=0; // number of splits
- Int_t initPsize = fNClusterP;//initial size of the arrays
- Int_t initNsize = fNClusterN;//we have to keep it because it will grow
- // in this function and it doasn't make
- // sense to pass through it again
-
- splitlist = new TArrayI(300);
+ Float_t factor=0.75; // How many percent must be lower signal
+ // on the middle one digit
+ // from its neighbours
+ Int_t signal0; //signal on the strip before the current one
+ Int_t signal1; //signal on the current one signal
+ Int_t signal2; //signal on the strip after the current one
+ TArrayI *splitlist; // List of splits
+ Int_t numerofsplits=0; // number of splits
+ Int_t initPsize = fNClusterP; //initial size of the arrays
+ Int_t initNsize = fNClusterN; //we have to keep it because it will grow
+ // in this function and it doasn't make
+ // sense to pass through it again
+ splitlist = new TArrayI(800);
for (i=0;i<initPsize;i++){
- if((((AliITSclusterSSD*)(*fClusterP)[i])->GetNumOfDigits())==1) continue;
- if((((AliITSclusterSSD*)(*fClusterP)[i])->GetNumOfDigits())==2) continue;
+ if (( ((AliITSclusterSSD*)(*fClusterP)[i])->
+ GetNumOfDigits())==1) continue;
+ if (( ((AliITSclusterSSD*)(*fClusterP)[i])->
+ GetNumOfDigits())==2) continue;
Int_t nj=(((AliITSclusterSSD*)(*fClusterP)[i])->GetNumOfDigits()-1);
for (Int_t j=1; j<nj; j++){
signal1=((AliITSclusterSSD*)(*fClusterP)[i])->GetDigitSignal(j);
signal2=((AliITSclusterSSD*)(*fClusterP)[i])->GetDigitSignal(j+1);
//if signal is less then factor*signal of its neighbours
if ( (signal1<(factor*signal0)) && (signal1<(factor*signal2)) ){
- (*splitlist)[numerofsplits++]=j;
+ (*splitlist)[numerofsplits++]=j;
} // end if
} // end loop over number of digits
- //split this cluster if necessary
+ //split this cluster if necessary
if(numerofsplits>0) SplitCluster(splitlist,numerofsplits,i,fgkSIDEP);
numerofsplits=0;
-
//in signed places (splitlist)
} // end loop over clusters on Pside
for (i=0;i<initNsize;i++) {
- if((((AliITSclusterSSD*)(*fClusterN)[i])->GetNumOfDigits())==1) continue;
- if((((AliITSclusterSSD*)(*fClusterN)[i])->GetNumOfDigits())==2) continue;
+ if (( ((AliITSclusterSSD*)(*fClusterN)[i])->
+ GetNumOfDigits())==1) continue;
+ if (( ((AliITSclusterSSD*)(*fClusterN)[i])->
+ GetNumOfDigits())==2) continue;
Int_t nj=(((AliITSclusterSSD*)(*fClusterN)[i])->GetNumOfDigits()-1);
for (Int_t j=1; j<nj; j++){
signal1=((AliITSclusterSSD*)(*fClusterN)[i])->GetDigitSignal(j);
} // end loop over number of digits
//split this cluster into more clusters
if(numerofsplits>0) SplitCluster(splitlist,numerofsplits,i,fgkSIDEN);
- numerofsplits=0; //in signed places (splitlist)
+ numerofsplits=0;
+ //in signed places (splitlist)
} // end loop over clusters on Nside
delete splitlist;
}
-//----------------------------------------------------------------------
+//______________________________________________________________________
void AliITSClusterFinderSSD::SplitCluster(TArrayI *list, Int_t nsplits,
Int_t index, Bool_t side){
//This function splits one side cluster into more clusters
register Int_t i; //iterator
AliITSclusterSSD* curentcluster;
Int_t *tmpdigits = new Int_t[100];
- Int_t NN;
- // side true means P side
+ Int_t nn;
+ // side true means P side
if (side) {
curentcluster =((AliITSclusterSSD*)((*fClusterP)[index])) ;
for (i = nsplits; i>0 ;i--) {
- NN=curentcluster->SplitCluster((*list)[(i-1)],tmpdigits);
- new ((*fClusterP)[fNClusterP]) AliITSclusterSSD(NN,
- tmpdigits,Digits(),side);
+ nn=curentcluster->SplitCluster((*list)[(i-1)],tmpdigits);
+ new ((*fClusterP)[fNClusterP]) AliITSclusterSSD(nn,tmpdigits,
+ Digits(),side);
( (AliITSclusterSSD*)((*fClusterP)[fNClusterP]) )->
- SetLeftNeighbour(kTRUE);
+ SetLeftNeighbour(kTRUE);
//if left cluster had neighbour on the right before split
//new should have it too
if ( curentcluster->GetRightNeighbour() )
( (AliITSclusterSSD*)((*fClusterP)[fNClusterP]) )->
- SetRightNeighbour(kTRUE);
+ SetRightNeighbour(kTRUE);
else curentcluster->SetRightNeighbour(kTRUE);
fNClusterP++;
} // end loop over nplits
} else {
curentcluster =((AliITSclusterSSD*)((*fClusterN)[index]));
for (i = nsplits; i>0 ;i--) {
- NN=curentcluster->SplitCluster((*list)[(i-1)],tmpdigits);
- new ((*fClusterN)[fNClusterN]) AliITSclusterSSD(NN,
- tmpdigits,Digits(),side);
+ nn=curentcluster->SplitCluster((*list)[(i-1)],tmpdigits);
+ new ((*fClusterN)[fNClusterN]) AliITSclusterSSD(nn,tmpdigits,
+ Digits(),side);
((AliITSclusterSSD*)((*fClusterN)[fNClusterN]))->
- SetRightNeighbour(kTRUE);
+ SetRightNeighbour(kTRUE);
if (curentcluster->GetRightNeighbour())
( (AliITSclusterSSD*)( (*fClusterN)[fNClusterN]) )->
- SetRightNeighbour(kTRUE);
+ SetRightNeighbour(kTRUE);
else curentcluster->SetRightNeighbour(kTRUE);
fNClusterN++;
} // end loop over nplits
} // end if side
delete []tmpdigits;
}
-//----------------------------------------------------------------------
+//______________________________________________________________________
Int_t AliITSClusterFinderSSD::SortDigitsP(Int_t start, Int_t end){
-// sort digits on the P side
+ // sort digits on the P side
Int_t right;
Int_t left;
+
if (start != (end - 1) ){
left=this->SortDigitsP(start,(start+end)/2);
right=this->SortDigitsP((start+end)/2,end);
return (left || right);
}else{
- left = ((AliITSdigitSSD*)((*(Digits()))[(*fDigitsIndexP)[start]]))->
- GetStripNumber();
+ left = ((AliITSdigitSSD*)((*(Digits()))[(*fDigitsIndexP)[start]]))->
+ GetStripNumber();
right= ((AliITSdigitSSD*)((*(Digits()))[(*fDigitsIndexP)[end]]))->
- GetStripNumber();
+ GetStripNumber();
if( left > right ){
Int_t tmp = (*fDigitsIndexP)[start];
(*fDigitsIndexP)[start]=(*fDigitsIndexP)[end];
(*fDigitsIndexP)[end]=tmp;
return 1;
- } // end if
- else return 0;
+ }else return 0;
} // end if
}
-//----------------------------------------------------------------------
+//______________________________________________________________________
Int_t AliITSClusterFinderSSD::SortDigitsN(Int_t start, Int_t end){
-// sort digits on the N side
+ // sort digits on the N side
Int_t right;
Int_t left;
return (left || right);
}else{
left =((AliITSdigitSSD*)((*(Digits()))[(*fDigitsIndexN)[start]]))->
- GetStripNumber();
+ GetStripNumber();
right=((AliITSdigitSSD*)((*(Digits()))[(*fDigitsIndexN)[end]]))->
- GetStripNumber();
+ GetStripNumber();
if ( left > right ){
Int_t tmp = (*fDigitsIndexN)[start];
(*fDigitsIndexN)[start]=(*fDigitsIndexN)[end];
}else return 0;
} // end if
}
-//----------------------------------------------------------------------
+//______________________________________________________________________
void AliITSClusterFinderSSD::FillDigitsIndex(){
//Fill the indexes of the clusters belonging to a given ITS module
- Int_t PNs=0, NNs=0;
- Int_t tmp,bit,k;
- Int_t N;
+
+ Int_t noentries;
Int_t i;
+ Int_t gain=0;
+ Int_t signal=0;
- N = fDigits->GetEntriesFast();
+ noentries = fDigits->GetEntriesFast();
- Int_t* PSidx = new Int_t [N*sizeof(Int_t)];
- Int_t* NSidx = new Int_t [N*sizeof(Int_t)];
- if (fDigitsIndexP==NULL) fDigitsIndexP = new TArrayI(N);
- if (fDigitsIndexN==NULL) fDigitsIndexN = new TArrayI(N);
+ if (fDigitsIndexP==NULL) fDigitsIndexP = new TArrayI(noentries);
+ if (fDigitsIndexN==NULL) fDigitsIndexN = new TArrayI(noentries);
AliITSdigitSSD *dig;
- for ( i = 0 ; i< N; i++ ) {
- dig = (AliITSdigitSSD*)GetDigit(i);
- if(dig->IsSideP()) {
- bit=1;
- tmp=dig->GetStripNumber();
- // I find this totally unnecessary - it's just a
- // CPU consuming double check
- for( k=0;k<PNs;k++){
- if (tmp==PSidx[k]){
- if (debug) cout<<"Such a digit exists \n";
- bit=0;
- } // end if
- } // end if
- // end comment
- if(bit) {
- fDigitsIndexP->AddAt(i,fNDigitsP++);
- PSidx[PNs++]=tmp;
- } // end if bit
- } else {
- bit=1;
- tmp=dig->GetStripNumber();
- // same as above
- for( k=0;k<NNs;k++){
- if (tmp==NSidx[k]){
- if (debug) cout<<"Such a digit exists \n";
- bit=0;
- } // end if
- } // end for k
- // end comment
- if (bit) {
- fDigitsIndexN->AddAt(i,fNDigitsN++);
- NSidx[NNs++] =tmp;
- } // end if bit
- } // end for dig->IsSideP()
+ for ( i = 0 ; i< noentries; i++ ) {
+
+ dig = (AliITSdigitSSD*)GetDigit(i);
+
+ gain=(Int_t) ((AliITSCalibrationSSD*)GetResp(fModule))->GetGainP(dig->GetStripNumber());
+ signal=gain*dig->GetSignal();
+ dig->SetSignal(signal);
+
+ if(dig->IsSideP()) fDigitsIndexP->AddAt(i,fNDigitsP++);
+ else fDigitsIndexN->AddAt(i,fNDigitsN++);
+
} // end for i
-
- delete [] PSidx;
- delete [] NSidx;
-
- if (debug) cout<<"Digits : P = "<<fNDigitsP<<" N = "<<fNDigitsN<<endl;
+
+ // delete [] psidx;
+ //delete [] nsidx;
+ // if (debug) cout<<"Digits : P = "<<fNDigitsP<<" N = "<<fNDigitsN<<endl;
}
-//----------------------------------------------------------------------
+//______________________________________________________________________
void AliITSClusterFinderSSD::SortDigits(){
-// sort digits
+ // sort digits
Int_t i;
- if(fNDigitsP>1)
- for (i=0;i<fNDigitsP-1;i++)
- if (SortDigitsP(0,(fNDigitsP-1-i))==0) break;
-
- if(fNDigitsN>1)
- for (i=0;i<fNDigitsN-1;i++)
- if(SortDigitsN(0,(fNDigitsN-1-i))==0) break;
+ if(fNDigitsP>1) for (i=0;i<fNDigitsP-1;i++)
+ if (SortDigitsP(0,(fNDigitsP-1-i))==0) break;
+ if(fNDigitsN>1) for (i=0;i<fNDigitsN-1;i++)
+ if(SortDigitsN(0,(fNDigitsN-1-i))==0) break;
}
-//----------------------------------------------------------------------
-void AliITSClusterFinderSSD::FillClIndexArrays(Int_t* arrayP, Int_t *arrayN){
-// fill cluster index array
+//______________________________________________________________________
+void AliITSClusterFinderSSD::FillClIndexArrays(Int_t* arrayP, Int_t *arrayN) const{
+ // fill cluster index array
register Int_t i;
- for (i=0; i<fNClusterP;i++){
- arrayP[i]=i;
- } // end for i
- for (i=0; i<fNClusterN;i++){
- arrayN[i]=i;
- } // end for i
+ for (i=0; i<fNClusterP;i++) arrayP[i]=i;
+ for (i=0; i<fNClusterN;i++) arrayN[i]=i;
}
-//----------------------------------------------------------------------
+//______________________________________________________________________
void AliITSClusterFinderSSD::SortClusters(Int_t* arrayP, Int_t *arrayN){
-// sort clusters
+ // sort clusters
Int_t i;
- if(fNClusterP>1)
- for (i=0;i<fNClusterP-1;i++)
- if (SortClustersP(0,(fNClusterP-1),arrayP)==0) break;
- if(fNClusterN>1)
- for (i=0;i<fNClusterN-1;i++)
- if (SortClustersN(0,(fNClusterN-1),arrayN)==0) break;
+ if(fNClusterP>1) for (i=0;i<fNClusterP-1;i++)
+ if (SortClustersP(0,(fNClusterP-1),arrayP)==0) break;
+ if(fNClusterN>1) for (i=0;i<fNClusterN-1;i++)
+ if (SortClustersN(0,(fNClusterN-1),arrayN)==0) break;
}
-//----------------------------------------------------------------------
+//______________________________________________________________________
Int_t AliITSClusterFinderSSD::SortClustersP(Int_t start, Int_t end,
Int_t *array){
-//Sort P side clusters
+ //Sort P side clusters
Int_t right;
Int_t left;
return (left || right);
} else {
left =((AliITSclusterSSD*)((*fClusterP)[array[start]]))->
- GetDigitStripNo(0);
+ GetDigitStripNo(0);
right=((AliITSclusterSSD*)((*fClusterP)[array[ end ]]))->
- GetDigitStripNo(0);
+ GetDigitStripNo(0);
if(left>right) {
Int_t tmp = array[start];
array[start]=array[end];
array[end]=tmp;
return 1;
} else return 0;
- } // end for start
+ } // end if
}
-//-------------------------------------------------------
-Int_t AliITSClusterFinderSSD::SortClustersN(Int_t start, Int_t end,
+//______________________________________________________________________
+Int_t AliITSClusterFinderSSD::SortClustersN(Int_t start, Int_t end,
Int_t *array){
-//Sort N side clusters
+ //Sort N side clusters
Int_t right;
Int_t left;
return (left || right);
} else {
left =((AliITSclusterSSD*)((*fClusterN)[array[start]]))->
- GetDigitStripNo(0);
+ GetDigitStripNo(0);
right=((AliITSclusterSSD*)((*fClusterN)[array[ end ]]))->
- GetDigitStripNo(0);
+ GetDigitStripNo(0);
if( left > right) {
Int_t tmp = array[start];
array[start]=array[end];
array[end]=tmp;
return 1;
} else return 0;
- } // end for start
+ } // end if
}
-//----------------------------------------------------------------------
-void AliITSClusterFinderSSD::ClustersToPackages(){
-// fill packages
- Int_t *oneSclP = new Int_t[fNClusterP]; //I want to have sorted 1 S clusters
- Int_t *oneSclN = new Int_t[fNClusterN]; //I can not sort it in TClonesArray
- //so, I create table of indexes and
- //sort it
- //I do not use TArrayI on purpose
- // MB: well, that's not true that one
- //cannot sort objects in TClonesArray
-
- //AliITSpackageSSD *currentpkg;
- AliITSclusterSSD *currentP;
- AliITSclusterSSD *currentN;
- Int_t j1, j2;
-
-//Fills in One Side Clusters Index Array
- FillClIndexArrays(oneSclP,oneSclN);
-//Sorts filled Arrays
- SortClusters(oneSclP,oneSclN);
-
- fNPackages=1;
- new ((*fPackages)[0]) AliITSpackageSSD(fClusterP,fClusterN);
- //currentpkg = (AliITSpackageSSD*)((*fPackages)[0]);
-
- // Take all pairs of recpoints x coordinates in both sides
- // to calculate z coordinates of the recpoints
- for (j1=0;j1<fNClusterP;j1++) {
- currentP = GetPSideCluster(oneSclP[j1]);
- Double_t xP = currentP->GetPosition();
- //Int_t NxP = currentP->GetNumOfDigits();
- Float_t signalP = currentP->GetTotalSignal();
- for (j2=0;j2<fNClusterN;j2++) {
- currentN = GetNSideCluster(oneSclN[j2]);
- Double_t xN = currentN->GetPosition();
- //Int_t NxN = currentN->GetNumOfDigits();
- Float_t signalN = currentN->GetTotalSignal();
- CreateNewRecPoint(xP,1,xN,1,signalP,signalN,currentP, currentN, 0.75);
-
- }
- }
-
- delete oneSclP;
- delete oneSclN;
-
+//______________________________________________________________________
+void AliITSClusterFinderSSD::ClustersToPackages(){
+ // fill packages
+
+ Int_t *oneSclP = new Int_t[fNClusterP];//I want to have sorted 1 S clusters
+ Int_t *oneSclN = new Int_t[fNClusterN];//I can not sort it in TClonesArray
+ //so, I create table of indexes and
+ //sort it
+ //I do not use TArrayI on purpose
+ //MB: well, that's not true that one
+ //cannot sort objs in TClonesArray
+ AliITSclusterSSD *currentP;
+ AliITSclusterSSD *currentN;
+ Int_t j1, j2;
+
+ //Fills in One Side Clusters Index Array
+ FillClIndexArrays(oneSclP,oneSclN);
+ //Sorts filled Arrays
+ //SortClusters(oneSclP,oneSclN);
+
+ fNPackages=1;
+ new ((*fPackages)[0]) AliITSpackageSSD(fClusterP,fClusterN);
+
+ //This part was includede by Boris Batiounia in March 2001.
+ // Take all recpoint pairs (x coordinates) in both P and N sides
+ // to calculate z coordinates of the recpoints
+
+ for (j1=0;j1<fNClusterP;j1++) {
+ currentP = GetPSideCluster(oneSclP[j1]);
+ Double_t xP = currentP->GetPosition();
+ Float_t signalP = currentP->GetTotalSignal();
+ for (j2=0;j2<fNClusterN;j2++) {
+ currentN = GetNSideCluster(oneSclN[j2]);
+ Double_t xN = currentN->GetPosition();
+ Float_t signalN = currentN->GetTotalSignal();
+ CreateNewRecPoint(xP,1,xN,1,signalP,signalN,currentP,currentN,
+ 0.75);
+ } // end for j2
+ } // end for j1
+
+ delete [] oneSclP;
+ delete [] oneSclN;
}
-
-
-//------------------------------------------------------
-Bool_t AliITSClusterFinderSSD::
-CreateNewRecPoint(Float_t P, Float_t dP, Float_t N, Float_t dN,
- Float_t SigP,Float_t SigN,
- AliITSclusterSSD *clusterP, AliITSclusterSSD *clusterN,
- Stat_t prob)
-{
-// create the recpoints
- const Float_t kADCtoKeV = 2.16;
- // 50 ADC units -> 30000 e-h pairs; 1e-h pair -> 3.6e-3 KeV;
- // 1 ADC unit -> (30000/50)*3.6e-3 = 2.16 KeV
- const Float_t kconv = 1.0e-4;
-
- const Float_t kRMSx = 20.0*kconv;
- const Float_t kRMSz = 800.0*kconv;
-
- Int_t n=0;
- Int_t *tr;
- if (GetCrossing(P,N)) {
-
- //GetCrossingError(dP,dN);
- AliITSRawClusterSSD cnew;
- Int_t nstripsP=clusterP->GetNumOfDigits();
- Int_t nstripsN=clusterN->GetNumOfDigits();
- Float_t signal = 0;
- Float_t dedx = 0;
-
- if(SigP>SigN) {
- signal = SigP;
- dedx = SigP*kADCtoKeV;
- }else{
- signal = SigN;
- dedx = SigN*kADCtoKeV;
- }
-
- Float_t signalCut = TMath::Abs((SigP-SigN)/signal);
-
- cnew.fSignalP=SigP;
- cnew.fSignalN=SigN;
- cnew.fMultiplicity=nstripsP;
- cnew.fMultiplicityN=nstripsN;
- cnew.fQErr=signalCut;
-
- //fITS->AddCluster(2,&cnew);
-
- if(signalCut<0.18) fITS->AddCluster(2,&cnew);
- // the cut of the signals difference in P and N sides to
- // remove the "ghosts"
-
+//______________________________________________________________________
+Bool_t AliITSClusterFinderSSD::CreateNewRecPoint(Float_t P,Float_t dP,
+ Float_t N, Float_t dN,
+ Float_t SigP,Float_t SigN,
+ AliITSclusterSSD *clusterP,
+ AliITSclusterSSD *clusterN,
+ Stat_t prob){
+ // create the recpoints
+ const Float_t kADCtoKeV = 2.16;
+ // 50 ADC units -> 30000 e-h pairs; 1e-h pair -> 3.6e-3 KeV;
+ // 1 ADC unit -> (30000/50)*3.6e-3 = 2.16 KeV
+ const Float_t kconv = 1.0e-4;
+ const Float_t kRMSx = 20.0*kconv;
+ const Float_t kRMSz = 800.0*kconv;
+ Int_t n=0;
+ Int_t *tr;
+ Int_t ntracks;
+
+ Int_t lay,lad,det;
+ fDetTypeRec->GetITSgeom()->GetModuleId(fModule,lay,lad,det);
+ Int_t ind=(lad-1)*fDetTypeRec->GetITSgeom()->GetNdetectors(lay)+(det-1);
+ Int_t lyr=(lay-1);
+
+ if (GetCrossing(P,N)) {
+ //GetCrossingError(dP,dN);
+ dP = dN = prob = 0.0; // to remove unused variable warning.
+ AliITSRawClusterSSD cnew;
+ Int_t nstripsP=clusterP->GetNumOfDigits();
+ Int_t nstripsN=clusterN->GetNumOfDigits();
+ Float_t signal = 0;
+ Float_t dedx = 0;
+ // Float_t meannoiseP=clusterP->GetMeanNoise();
+ //Float_t meannoiseN=clusterN->GetMeanNoise();
+ //cout<<meannoiseP<<" "<<meannoiseN<<endl;
+ if(SigP>SigN) {
+ signal = SigP;
+ dedx = SigP*kADCtoKeV;
+ }else{
+ signal = SigN;
+ dedx = SigN*kADCtoKeV;
+ } // end if SigP>SigN
tr = (Int_t*) clusterP->GetTracks(n);
-
- AliITSRecPoint rnew;
- rnew.SetX(P*kconv);
- rnew.SetZ(N*kconv);
- rnew.SetQ(signal);
- rnew.SetdEdX(dedx);
- rnew.SetSigmaX2( kRMSx* kRMSx);
- rnew.SetSigmaZ2( kRMSz* kRMSz);
- rnew.fTracks[0]=tr[0];
- rnew.fTracks[1]=tr[1];
- rnew.fTracks[2]=tr[2];
-
- //fITS->AddRecPoint(rnew);
-
- if(signalCut<0.18) fITS->AddRecPoint(rnew);
- // the cut of the signals difference in P and N sides to
- // remove the "ghosts"
-
+ ntracks = clusterP->GetNTracks();
+
+ //cnew.SetDigitsClusterP(clusterP);
+ //cnew.SetDigitsClusterN(clusterN);
+
+ cnew.SetSignalP(SigP);
+ cnew.SetSignalN(SigN);
+ cnew.SetMultiplicity(nstripsP);
+ cnew.SetMultN(nstripsN);
+ cnew.SetQErr(TMath::Abs(SigP-SigN));
+ cnew.SetNTrack(ntracks);
+ //cnew.SetMeanNoiseP(meannoiseP);
+ //cnew.SetMeanNoiseN(meannoiseN);
+ fDetTypeRec->AddCluster(2,&cnew);
+ //fITS->AddCluster(2,&cnew);
+ //AliITSRecPoint rnew;
+ Int_t lab[4] = {tr[0],tr[1],tr[2],ind};
+ Float_t hit[5] = {P*kconv,N*kconv,kRMSx*kRMSx,kRMSz*kRMSz,signal};
+ Int_t info[3] = {nstripsP,nstripsN,lyr};
+
+ AliITSRecPoint rnew(lab,hit,info,kTRUE);
+ rnew.SetdEdX(dedx);
+
+ fDetTypeRec->AddRecPoint(rnew);
+ // fITS->AddRecPoint(rnew);
return kTRUE;
- }
- return kFALSE;
+ } // end if
+ return kFALSE;
}
-
-
-//------------------------------------------------------
-void AliITSClusterFinderSSD::CalcStepFactor(Float_t Psteo, Float_t Nsteo )
-{
-// calculate the step factor for matching clusters
-
-
- // 95 is the pitch, 4000 - dimension along z ?
-
-
- Float_t dz=fSegmentation->Dz();
-
- fSFF = ( (Int_t) (Psteo*dz/fPitch ) );// +1;
- fSFB = ( (Int_t) (Nsteo*dz/fPitch ) );// +1;
-
+//______________________________________________________________________
+void AliITSClusterFinderSSD::CalcStepFactor(Float_t Psteo, Float_t Nsteo){
+ // calculate the step factor for matching clusters
+ // 95 is the pitch, 4000 - dimension along z ?
+ //Float_t dz=fSegmentation->Dz();
+ Float_t dz=GetSeg()->Dz();
+
+ fSFF = ( (Int_t) (Psteo*dz/fPitch ) );// +1;
+ fSFB = ( (Int_t) (Nsteo*dz/fPitch ) );// +1;
}
+//______________________________________________________________________
+AliITSclusterSSD* AliITSClusterFinderSSD::GetPSideCluster(Int_t idx){
+ // get P side clusters
-
-//-----------------------------------------------------------
-AliITSclusterSSD* AliITSClusterFinderSSD::GetPSideCluster(Int_t idx)
-{
-// get P side clusters
-
-
-
-
- if((idx<0)||(idx>=fNClusterP))
- {
- printf("AliITSClusterFinderSSD::GetPSideCluster : index out of range\n");
- return 0;
- }
- else
- {
- return (AliITSclusterSSD*)((*fClusterP)[idx]);
- }
+ if((idx<0)||(idx>=fNClusterP)){
+ printf("AliITSClusterFinderSSD::GetPSideCluster: index out of range\n");
+ return 0;
+ }else{
+ return (AliITSclusterSSD*)((*fClusterP)[idx]);
+ } // end if
}
+//______________________________________________________________________
+AliITSclusterSSD* AliITSClusterFinderSSD::GetNSideCluster(Int_t idx){
+ // get N side clusters
-//-------------------------------------------------------
-AliITSclusterSSD* AliITSClusterFinderSSD::GetNSideCluster(Int_t idx)
-{
-// get N side clusters
-
- if((idx<0)||(idx>=fNClusterN))
- {
- printf("AliITSClusterFinderSSD::GetNSideCluster : index out of range\n");
- return 0;
- }
- else
- {
- return (AliITSclusterSSD*)((*fClusterN)[idx]);
- }
+ if((idx<0)||(idx>=fNClusterN)){
+ printf("AliITSClusterFinderSSD::GetNSideCluster: index out of range\n");
+ return 0;
+ }else{
+ return (AliITSclusterSSD*)((*fClusterN)[idx]);
+ } // end if
}
+//______________________________________________________________________
+AliITSclusterSSD* AliITSClusterFinderSSD::GetCluster(Int_t idx, Bool_t side){
+ // Get cluster
-//--------------------------------------------------------
-AliITSclusterSSD* AliITSClusterFinderSSD::GetCluster(Int_t idx, Bool_t side)
-{
-// Get cluster
-
- return (side) ? GetPSideCluster(idx) : GetNSideCluster(idx);
+ return (side) ? GetPSideCluster(idx) : GetNSideCluster(idx);
}
-
-//_______________________________________________________________________
-
-Bool_t AliITSClusterFinderSSD::GetCrossing (Float_t &P, Float_t &N)
-{
-// get crossing
-
- Float_t Dx = fSegmentation->Dx(); // detector size in x direction, microns
- Float_t Dz = fSegmentation->Dz(); // detector size in z direction, microns
-
- Float_t xL; // x local coordinate
- Float_t zL; // z local coordinate
- Float_t x; // x = xL + Dx/2
- Float_t z; // z = zL + Dz/2
- Float_t xP; // x coordinate in the P side from the first P strip
- Float_t xN; // x coordinate in the N side from the first N strip
- Float_t StereoP,StereoN;
-
- fSegmentation->Angles(StereoP,StereoN);
- fTanP=TMath::Tan(StereoP);
- fTanN=TMath::Tan(StereoN);
- Float_t kP = fTanP; // Tangent of 0.0075 mrad
- Float_t kN = fTanN; // Tangent of 0.0275 mrad
-
+//______________________________________________________________________
+Bool_t AliITSClusterFinderSSD::GetCrossing (Float_t &P, Float_t &N){
+ // get crossing
+ // This function was rivised and changed by Boris Batiounia in March 2001
+ Float_t dx = GetSeg()->Dx(); // detector size in x direction, microns
+ Float_t dz = GetSeg()->Dz(); // detector size in z direction, microns
+ //Float_t dx = fSegmentation->Dx(); // detector size in x direction, microns
+ //Float_t dz = fSegmentation->Dz(); // detector size in z direction, microns
+ //cout<<dx<<" "<<dz<<endl;
+ Float_t xL; // x local coordinate
+ Float_t zL; // z local coordinate
+ Float_t x; // x = xL + dx/2
+ Float_t z; // z = zL + dz/2
+ Float_t xP; // x coordinate in the P side from the first P strip
+ Float_t xN; // x coordinate in the N side from the first N strip
+ Float_t stereoP,stereoN;
+
+ //fSegmentation->Angles(stereoP,stereoN);
+ GetSeg()->Angles(stereoP,stereoN);
+
+ //cout<<stereoP<<" "<<stereoN<<" "<<P<<" "<<N<<endl;
+
+ //cout<<" P="<<P<<", N="<<N<<endl;
+
+ fTanP=TMath::Tan(stereoP);
+ fTanN=TMath::Tan(stereoN);
+ Float_t kP = fTanP; // Tangent of 0.0075 mrad
+ Float_t kN = fTanN; // Tangent of 0.0275 mrad
P *= fPitch;
N *= fPitch;
- xP = N; // change the mistake for the P/N
- xN = P; // coordinates correspondence in this function
- x = xP + kP*(Dz*kN-xP+xN)/(kP+kN);
- z = (Dz*kN-xP+xN)/(kP+kN);
- xL = x - Dx/2;
- zL = z - Dz/2;
+
+ xP = P;
+ xN = N;
+ // xP = N; // change the mistake for the P/N
+ //xN = P; // coordinates correspondence in this function
+
+ z=(xN-xP+dz*kN)/(kP+kN);
+ x=xP+kP*z;
+
+ xL = x - dx/2;
+ zL = z - dz/2;
P = xL;
N = zL;
+ //cout<<"P= "<<P<<" , N= "<<N<<" , dx= "<<dx<<endl;
- if(TMath::Abs(xL) > Dx/2 || TMath::Abs(zL) > Dz/2) return kFALSE;
+ //cout<<"P="<<P<<", N="<<N<<endl;
+
+ if(TMath::Abs(xL) > dx/2 || TMath::Abs(zL) > dz/2) return kFALSE;
+
// Check that xL and zL are inside the detector for the
// correspondent xP and xN coordinates
return kTRUE;
}
-
-
-//_________________________________________________________________________
-
-void AliITSClusterFinderSSD::GetCrossingError(Float_t& dP, Float_t& dN)
-{
-// get crossing error
-
- Float_t dz, dx;
-
- dz = TMath::Abs(( dP + dN )*fPitch/(fTanP + fTanN) );
- dx = fPitch*(TMath::Abs(dP*(1 - fTanP/(fTanP + fTanN))) +
- TMath::Abs(dN *fTanP/(fTanP + fTanN) ));
-
- dN = dz;
- dP = dx;
+//______________________________________________________________________
+void AliITSClusterFinderSSD::GetCrossingError(Float_t& dP, Float_t& dN){
+ // get crossing error
+ Float_t dz, dx;
+
+ dz = TMath::Abs(( dP + dN )*fPitch/(fTanP + fTanN) );
+ dx = fPitch*(TMath::Abs(dP*(1 - fTanP/(fTanP + fTanN))) +
+ TMath::Abs(dN *fTanP/(fTanP + fTanN) ));
+ dN = dz;
+ dP = dx;
}
-
-
-
-
-
-
-
git://git.uio.no / u / mrichter / AliRoot.git / blobdiff