* provided "as is" without express or implied warranty. *
**************************************************************************/
-/*
-$Log$
-Revision 1.4 2000/11/10 14:57:52 cblume
-Changes in the geometry constants for the DEC compiler
+/* $Id$ */
-Revision 1.3 2000/10/15 23:40:01 cblume
-Remove AliTRDconst
-
-Revision 1.2 2000/10/06 16:49:46 cblume
-Made Getters const
-
-Revision 1.1.2.2 2000/10/04 16:34:58 cblume
-Replace include files by forward declarations
-
-Revision 1.1.2.1 2000/09/22 14:47:52 cblume
-Add the tracking code
-
-*/
+///////////////////////////////////////////////////////////////////////////////
+// //
+// The standard TRD tracker //
+// //
+///////////////////////////////////////////////////////////////////////////////
+#include <Riostream.h>
#include <TFile.h>
-#include <TROOT.h>
#include <TBranch.h>
-#include <TTree.h>
+#include <TTree.h>
+#include <TObjArray.h>
-#include "AliRun.h"
-
-#include "AliTRD.h"
#include "AliTRDgeometry.h"
-#include "AliTRDrecPoint.h"
+#include "AliTRDparameter.h"
+#include "AliTRDpadPlane.h"
+#include "AliTRDgeometryFull.h"
#include "AliTRDcluster.h"
#include "AliTRDtrack.h"
-#include "AliTRDtrackingSector.h"
-#include "AliTRDtimeBin.h"
+#include "AliESD.h"
#include "AliTRDtracker.h"
ClassImp(AliTRDtracker)
+ const Float_t AliTRDtracker::fgkSeedDepth = 0.5;
+ const Float_t AliTRDtracker::fgkSeedStep = 0.10;
+ const Float_t AliTRDtracker::fgkSeedGap = 0.25;
+
+ const Float_t AliTRDtracker::fgkMaxSeedDeltaZ12 = 40.;
+ const Float_t AliTRDtracker::fgkMaxSeedDeltaZ = 25.;
+ const Float_t AliTRDtracker::fgkMaxSeedC = 0.0052;
+ const Float_t AliTRDtracker::fgkMaxSeedTan = 1.2;
+ const Float_t AliTRDtracker::fgkMaxSeedVertexZ = 150.;
+
+ const Double_t AliTRDtracker::fgkSeedErrorSY = 0.2;
+ const Double_t AliTRDtracker::fgkSeedErrorSY3 = 2.5;
+ const Double_t AliTRDtracker::fgkSeedErrorSZ = 0.1;
+
+ const Float_t AliTRDtracker::fgkMinClustersInSeed = 0.7;
+
+ const Float_t AliTRDtracker::fgkMinClustersInTrack = 0.5;
+ const Float_t AliTRDtracker::fgkMinFractionOfFoundClusters = 0.8;
+
+ const Float_t AliTRDtracker::fgkSkipDepth = 0.3;
+ const Float_t AliTRDtracker::fgkLabelFraction = 0.8;
+ const Float_t AliTRDtracker::fgkWideRoad = 20.;
+
+ const Double_t AliTRDtracker::fgkMaxChi2 = 12.;
+
+const Int_t AliTRDtracker::fgkFirstPlane = 5;
+const Int_t AliTRDtracker::fgkLastPlane = 17;
+
+
//____________________________________________________________________
-AliTRDtracker::AliTRDtracker()
+AliTRDtracker::AliTRDtracker():AliTracker(),
+ fGeom(0),
+ fPar(0),
+ fNclusters(0),
+ fClusters(0),
+ fNseeds(0),
+ fSeeds(0),
+ fNtracks(0),
+ fTracks(0),
+ fSY2corr(0),
+ fSZ2corr(0),
+ fTimeBinsPerPlane(0),
+ fMaxGap(0),
+ fVocal(kFALSE),
+ fAddTRDseeds(kFALSE),
+ fNoTilt(kFALSE)
{
- //
// Default constructor
- //
- fInputFile = NULL;
- fEvent = 0;
+ for(Int_t i=0;i<kTrackingSectors;i++) fTrSec[i]=0;
+ for(Int_t j=0;j<5;j++)
+ for(Int_t k=0;k<18;k++) fHoles[j][k]=kFALSE;
+}
+//____________________________________________________________________
+AliTRDtracker::AliTRDtracker(const TFile *geomfile):AliTracker()
+{
+ //
+ // Main constructor
+ //
+
+ //Float_t fTzero = 0;
+
+ fAddTRDseeds = kFALSE;
+ fGeom = NULL;
+ fNoTilt = kFALSE;
+
+ TDirectory *savedir=gDirectory;
+ TFile *in=(TFile*)geomfile;
+ if (!in->IsOpen()) {
+ printf("AliTRDtracker::AliTRDtracker(): geometry file is not open!\n");
+ printf(" DETAIL TRD geometry and DEFAULT TRD parameter will be used\n");
+ }
+ else {
+ in->cd();
+// in->ls();
+ fGeom = (AliTRDgeometry*) in->Get("TRDgeometry");
+ fPar = (AliTRDparameter*) in->Get("TRDparameter");
+// fGeom->Dump();
+ }
- fGeom = NULL;
- fNclusters = 0;
- fClusters = NULL;
- fNseeds = 0;
- fSeeds = NULL;
- fNtracks = 0;
- fTracks = NULL;
+ if(fGeom) {
+ // fTzero = geo->GetT0();
+ printf("Found geometry version %d on file \n", fGeom->IsVersion());
+ }
+ else {
+ printf("AliTRDtracker::AliTRDtracker(): can't find TRD geometry!\n");
+ //printf("The DETAIL TRD geometry will be used\n");
+ //fGeom = new AliTRDgeometryDetail();
+ fGeom = new AliTRDgeometryFull();
+ fGeom->SetPHOShole();
+ fGeom->SetRICHhole();
+ }
+
+ if (!fPar) {
+ printf("AliTRDtracker::AliTRDtracker(): can't find TRD parameter!\n");
+ printf("The DEFAULT TRD parameter will be used\n");
+ fPar = new AliTRDparameter();
+ }
+ fPar->ReInit();
-}
+ savedir->cd();
-//____________________________________________________________________
-AliTRDtracker::AliTRDtracker(const Text_t* name, const Text_t* title)
- :TNamed(name, title)
-{
- fInputFile = NULL;
- fEvent = 0;
+ // fGeom->SetT0(fTzero);
- fGeom = NULL;
fNclusters = 0;
fClusters = new TObjArray(2000);
fNseeds = 0;
- fSeeds = new TObjArray(20000);
+ fSeeds = new TObjArray(2000);
fNtracks = 0;
- fTracks = new TObjArray(10000);
+ fTracks = new TObjArray(1000);
-}
+ for(Int_t geomS = 0; geomS < kTrackingSectors; geomS++) {
+ Int_t trS = CookSectorIndex(geomS);
+ fTrSec[trS] = new AliTRDtrackingSector(fGeom, geomS, fPar);
+ for (Int_t icham=0;icham<AliTRDgeometry::kNcham; icham++){
+ fHoles[icham][trS]=fGeom->IsHole(0,icham,geomS);
+ }
+ }
+
+ AliTRDpadPlane *padPlane = fPar->GetPadPlane(0,0);
+ Float_t tiltAngle = TMath::Abs(padPlane->GetTiltingAngle());
+ if(tiltAngle < 0.1) {
+ fNoTilt = kTRUE;
+ }
+
+ fSY2corr = 0.2;
+ fSZ2corr = 120.;
+
+ if(fNoTilt && (tiltAngle > 0.1)) fSY2corr = fSY2corr + tiltAngle * 0.05;
+
+
+ // calculate max gap on track
+
+ Double_t dxAmp = (Double_t) fGeom->CamHght(); // Amplification region
+ Double_t dxDrift = (Double_t) fGeom->CdrHght(); // Drift region
+ Double_t dx = (Double_t) fPar->GetDriftVelocity()
+ / fPar->GetSamplingFrequency();
+ Int_t tbAmp = fPar->GetTimeBefore();
+ Int_t maxAmp = (Int_t) ((dxAmp+0.000001)/dx);
+ if(kTRUE) maxAmp = 0; // intentional until we change the parameter class
+ Int_t tbDrift = fPar->GetTimeMax();
+ Int_t maxDrift = (Int_t) ((dxDrift+0.000001)/dx);
+
+ tbDrift = TMath::Min(tbDrift,maxDrift);
+ tbAmp = TMath::Min(tbAmp,maxAmp);
+
+ fTimeBinsPerPlane = tbAmp + tbDrift;
+ fMaxGap = (Int_t) (fTimeBinsPerPlane * fGeom->Nplan() * fgkSkipDepth);
+
+ fVocal = kFALSE;
+
+ savedir->cd();
+}
//___________________________________________________________________
AliTRDtracker::~AliTRDtracker()
{
- if (fInputFile) {
- fInputFile->Close();
- delete fInputFile;
+ //
+ // Destructor of AliTRDtracker
+ //
+
+ if (fClusters) {
+ fClusters->Delete();
+ delete fClusters;
+ }
+ if (fTracks) {
+ fTracks->Delete();
+ delete fTracks;
+ }
+ if (fSeeds) {
+ fSeeds->Delete();
+ delete fSeeds;
+ }
+ delete fGeom;
+ delete fPar;
+
+ for(Int_t geomS = 0; geomS < kTrackingSectors; geomS++) {
+ delete fTrSec[geomS];
}
- delete fClusters;
- delete fTracks;
- delete fSeeds;
- delete fGeom;
-}
+}
//_____________________________________________________________________
-static Double_t SigmaY2trd(Double_t r, Double_t tgl, Double_t pt)
-{
- // Parametrised "expected" error of the cluster reconstruction in Y
- Double_t s = 1.;
- return s;
-}
+Bool_t AliTRDtracker::AdjustSector(AliTRDtrack *track) {
+ //
+ // Rotates the track when necessary
+ //
-//_____________________________________________________________________
-static Double_t SigmaZ2trd(Double_t r, Double_t tgl)
-{
- // Parametrised "expected" error of the cluster reconstruction in Z
+ Double_t alpha = AliTRDgeometry::GetAlpha();
+ Double_t y = track->GetY();
+ Double_t ymax = track->GetX()*TMath::Tan(0.5*alpha);
- AliTRD *TRD = (AliTRD*) gAlice->GetDetector("TRD");
- AliTRDgeometry *fGeom;
- fGeom = TRD->GetGeometry();
- Double_t s, pad = fGeom->GetRowPadSize();
- s = pad * pad /12.;
- return s;
-}
+ //Int_t ns = AliTRDgeometry::kNsect;
+ //Int_t s=Int_t(track->GetAlpha()/alpha)%ns;
+
+ if (y > ymax) {
+ //s = (s+1) % ns;
+ if (!track->Rotate(alpha)) return kFALSE;
+ } else if (y <-ymax) {
+ //s = (s-1+ns) % ns;
+ if (!track->Rotate(-alpha)) return kFALSE;
+ }
+
+ return kTRUE;
+}
//_____________________________________________________________________
inline Double_t f1trd(Double_t x1,Double_t y1,
Double_t x2,Double_t y2,
Double_t x3,Double_t y3)
{
+ //
// Initial approximation of the track curvature
- // Origin: Iouri Belikov, CERN, Jouri.Belikov@cern.ch
-
+ //
Double_t d=(x2-x1)*(y3-y2)-(x3-x2)*(y2-y1);
Double_t a=0.5*((y3-y2)*(y2*y2-y1*y1+x2*x2-x1*x1)-
(y2-y1)*(y3*y3-y2*y2+x3*x3-x2*x2));
Double_t x2,Double_t y2,
Double_t x3,Double_t y3)
{
- // Initial approximation of the track curvature times center of curvature
- // Origin: Iouri Belikov, CERN, Jouri.Belikov@cern.ch
+ //
+ // Initial approximation of the track curvature times X coordinate
+ // of the center of curvature
+ //
Double_t d=(x2-x1)*(y3-y2)-(x3-x2)*(y2-y1);
Double_t a=0.5*((y3-y2)*(y2*y2-y1*y1+x2*x2-x1*x1)-
Double_t x2,Double_t y2,
Double_t z1,Double_t z2)
{
+ //
// Initial approximation of the tangent of the track dip angle
- // Origin: Iouri Belikov, CERN, Jouri.Belikov@cern.ch
+ //
return (z1 - z2)/sqrt((x1-x2)*(x1-x2)+(y1-y2)*(y1-y2));
}
-//___________________________________________________________________
-
-static Int_t FindProlongation(AliTRDseed& t, AliTRDtrackingSector *sec,
- Int_t s, Int_t rf=0)
-{
- // Starting from current position on track=t this function tries
- // to extrapolate the track up to timeBin=rf and to confirm prolongation
- // if a close cluster is found. *sec is a pointer to allocated
- // array of sectors, in which the initial sector has index=s.
-
- const Int_t TIME_BINS_TO_SKIP=Int_t(0.2*sec->GetNtimeBins());
- const Double_t MAX_CHI2=12.;
- Int_t try_again=TIME_BINS_TO_SKIP;
-
- Double_t alpha=AliTRDgeometry::GetAlpha();
-
- Int_t ns=Int_t(2*TMath::Pi()/alpha+0.5);
-
- for (Int_t nr=sec->GetTimeBinNumber(t.GetX())-1; nr>=rf; nr--) {
- Double_t x=sec->GetX(nr), ymax=sec->GetMaxY(nr);
- if (!t.PropagateTo(x)) {
- cerr<<"Can't propagate to x = "<<x<<endl;
- return 0;
+AliTRDcluster * AliTRDtracker::GetCluster(AliTRDtrack * track, Int_t plane, Int_t timebin){
+ //
+ //try to find cluster in the backup list
+ //
+ AliTRDcluster * cl =0;
+ UInt_t *indexes = track->GetBackupIndexes();
+ for (UInt_t i=0;i<kMaxTimeBinIndex;i++){
+ if (indexes[i]==0) break;
+ AliTRDcluster * cli = (AliTRDcluster*)fClusters->UncheckedAt(indexes[i]);
+ if (!cli) break;
+ if (cli->GetLocalTimeBin()!=timebin) continue;
+ Int_t iplane = fGeom->GetPlane(cli->GetDetector());
+ if (iplane==plane) {
+ cl = cli;
+ break;
}
+ }
+ return cl;
+}
- AliTRDcluster *cl=0;
- UInt_t index=0;
- Double_t max_chi2=MAX_CHI2;
- // const AliTRDtimeBin& time_bin=sec[s][nr];
- AliTRDtimeBin& time_bin=sec[s][nr];
- Double_t sy2=SigmaY2trd(t.GetX(),t.GetTgl(),t.GetPt());
- Double_t sz2=SigmaZ2trd(t.GetX(),t.GetTgl());
- Double_t road=5.*sqrt(t.GetSigmaY2() + sy2), y=t.GetY(), z=t.GetZ();
+Int_t AliTRDtracker::GetLastPlane(AliTRDtrack * track){
+ //
+ //return last updated plane
+ Int_t lastplane=0;
+ UInt_t *indexes = track->GetBackupIndexes();
+ for (UInt_t i=0;i<kMaxTimeBinIndex;i++){
+ AliTRDcluster * cli = (AliTRDcluster*)fClusters->UncheckedAt(indexes[i]);
+ if (!cli) break;
+ Int_t iplane = fGeom->GetPlane(cli->GetDetector());
+ if (iplane>lastplane) {
+ lastplane = iplane;
+ }
+ }
+ return lastplane;
+}
+//___________________________________________________________________
+Int_t AliTRDtracker::Clusters2Tracks(AliESD* event)
+{
+ //
+ // Finds tracks within the TRD. The ESD event is expected to contain seeds
+ // at the outer part of the TRD. The seeds
+ // are found within the TRD if fAddTRDseeds is TRUE.
+ // The tracks are propagated to the innermost time bin
+ // of the TRD and the ESD event is updated
+ //
- if (road>30) {
- if (t.GetNclusters() > 4) {
- cerr<<t.GetNclusters()<<" FindProlongation: Road is too wide !\n";
+ Int_t timeBins = fTrSec[0]->GetNumberOfTimeBins();
+ Float_t foundMin = fgkMinClustersInTrack * timeBins;
+ Int_t nseed = 0;
+ Int_t found = 0;
+ Int_t innerTB = fTrSec[0]->GetInnerTimeBin();
+
+ Int_t n = event->GetNumberOfTracks();
+ for (Int_t i=0; i<n; i++) {
+ AliESDtrack* seed=event->GetTrack(i);
+ ULong_t status=seed->GetStatus();
+ if ( (status & AliESDtrack::kTRDout ) == 0 ) continue;
+ if ( (status & AliESDtrack::kTRDin) != 0 ) continue;
+ nseed++;
+
+ AliTRDtrack* seed2 = new AliTRDtrack(*seed);
+ //seed2->ResetCovariance();
+ AliTRDtrack *pt = new AliTRDtrack(*seed2,seed2->GetAlpha());
+ AliTRDtrack &t=*pt;
+ FollowProlongation(t, innerTB);
+ if (t.GetNumberOfClusters() >= foundMin) {
+ UseClusters(&t);
+ CookLabel(pt, 1-fgkLabelFraction);
+ // t.CookdEdx();
+ }
+ found++;
+// cout<<found<<'\r';
+
+ if(PropagateToTPC(t)) {
+ seed->UpdateTrackParams(pt, AliESDtrack::kTRDin);
+ }
+ delete seed2;
+ delete pt;
+ }
+
+ cout<<"Number of loaded seeds: "<<nseed<<endl;
+ cout<<"Number of found tracks from loaded seeds: "<<found<<endl;
+
+ // after tracks from loaded seeds are found and the corresponding
+ // clusters are used, look for additional seeds from TRD
+
+ if(fAddTRDseeds) {
+ // Find tracks for the seeds in the TRD
+ Int_t timeBins = fTrSec[0]->GetNumberOfTimeBins();
+
+ Int_t nSteps = (Int_t) (fgkSeedDepth / fgkSeedStep);
+ Int_t gap = (Int_t) (timeBins * fgkSeedGap);
+ Int_t step = (Int_t) (timeBins * fgkSeedStep);
+
+ // make a first turn with tight cut on initial curvature
+ for(Int_t turn = 1; turn <= 2; turn++) {
+ if(turn == 2) {
+ nSteps = (Int_t) (fgkSeedDepth / (3*fgkSeedStep));
+ step = (Int_t) (timeBins * (3*fgkSeedStep));
+ }
+ for(Int_t i=0; i<nSteps; i++) {
+ Int_t outer=timeBins-1-i*step;
+ Int_t inner=outer-gap;
+
+ nseed=fSeeds->GetEntriesFast();
+
+ MakeSeeds(inner, outer, turn);
+
+ nseed=fSeeds->GetEntriesFast();
+ // printf("\n turn %d, step %d: number of seeds for TRD inward %d\n",
+ // turn, i, nseed);
+
+ for (Int_t i=0; i<nseed; i++) {
+ AliTRDtrack *pt=(AliTRDtrack*)fSeeds->UncheckedAt(i), &t=*pt;
+ FollowProlongation(t,innerTB);
+ if (t.GetNumberOfClusters() >= foundMin) {
+ UseClusters(&t);
+ CookLabel(pt, 1-fgkLabelFraction);
+ t.CookdEdx();
+ found++;
+// cout<<found<<'\r';
+ if(PropagateToTPC(t)) {
+ AliESDtrack track;
+ track.UpdateTrackParams(pt,AliESDtrack::kTRDin);
+ event->AddTrack(&track);
+ // track.SetTRDtrack(new AliTRDtrack(*pt));
+ }
+ }
+ delete fSeeds->RemoveAt(i);
+ fNseeds--;
+ }
}
- return 0;
- }
-
- if (time_bin) {
- for (Int_t i=time_bin.Find(y-road); i<time_bin; i++) {
- AliTRDcluster* c=(AliTRDcluster*)(time_bin[i]);
- if (c->GetY() > y+road) break;
- if (c->IsUsed() > 0) continue;
-
- if((c->GetZ()-z)*(c->GetZ()-z) > 25. + sz2) continue;
-
- Double_t chi2=t.GetPredictedChi2(c);
-
- if (chi2 > max_chi2) continue;
- max_chi2=chi2;
- cl=c;
- index=time_bin.GetIndex(i);
- }
}
- if (cl) {
-
- // Float_t l=sec->GetPitch();
- // t.SetSampledEdx(cl->fQ/l,Int_t(t));
+ }
+
+ cout<<"Total number of found tracks: "<<found<<endl;
+
+ return 0;
+}
- t.Update(cl,max_chi2,index);
+
+
+//_____________________________________________________________________________
+Int_t AliTRDtracker::PropagateBack(AliESD* event) {
+ //
+ // Gets seeds from ESD event. The seeds are AliTPCtrack's found and
+ // backpropagated by the TPC tracker. Each seed is first propagated
+ // to the TRD, and then its prolongation is searched in the TRD.
+ // If sufficiently long continuation of the track is found in the TRD
+ // the track is updated, otherwise it's stored as originaly defined
+ // by the TPC tracker.
+ //
+
+ Int_t found=0;
+ Float_t foundMin = 20;
+ Int_t n = event->GetNumberOfTracks();
+ //
+ //Sort tracks
+ Float_t *quality =new Float_t[n];
+ Int_t *index =new Int_t[n];
+ for (Int_t i=0; i<n; i++) {
+ AliESDtrack* seed=event->GetTrack(i);
+ Double_t covariance[15];
+ seed->GetExternalCovariance(covariance);
+ quality[i] = covariance[0]+covariance[2];
+ }
+ TMath::Sort(n,quality,index,kFALSE);
+ //
+ for (Int_t i=0; i<n; i++) {
+ // AliESDtrack* seed=event->GetTrack(i);
+ AliESDtrack* seed=event->GetTrack(index[i]);
+
+ ULong_t status=seed->GetStatus();
+ if ( (status & AliESDtrack::kTPCout ) == 0 ) continue;
+ if ( (status & AliESDtrack::kTRDout) != 0 ) continue;
+
+ Int_t lbl = seed->GetLabel();
+ AliTRDtrack *track = new AliTRDtrack(*seed);
+ track->SetSeedLabel(lbl);
+ seed->UpdateTrackParams(track, AliESDtrack::kTRDbackup); //make backup
+ fNseeds++;
+ Float_t p4 = track->GetC();
+ //
+ Int_t expectedClr = FollowBackProlongation(*track);
+ /*
+ // only debug purpose
+ if (track->GetNumberOfClusters()<expectedClr/3){
+ AliTRDtrack *track1 = new AliTRDtrack(*seed);
+ track1->SetSeedLabel(lbl);
+ FollowBackProlongation(*track1);
+ AliTRDtrack *track2= new AliTRDtrack(*seed);
+ track->SetSeedLabel(lbl);
+ FollowBackProlongation(*track2);
+ delete track1;
+ delete track2;
+ }
+ */
+ if (TMath::Abs(track->GetC()-p4)/TMath::Abs(p4)<0.2 || TMath::Abs(track->GetPt())>0.8 ) {
+ //
+ //make backup for back propagation
+ //
+ Int_t foundClr = track->GetNumberOfClusters();
+ if (foundClr >= foundMin) {
+ track->CookdEdx();
+ CookLabel(track, 1-fgkLabelFraction);
+ if(track->GetChi2()/track->GetNumberOfClusters()<4) { // sign only gold tracks
+ if (seed->GetKinkIndex(0)==0&&TMath::Abs(track->GetPt())<1.5 ) UseClusters(track);
+ }
+ Bool_t isGold = kFALSE;
+
+ if (track->GetChi2()/track->GetNumberOfClusters()<5) { //full gold track
+ seed->UpdateTrackParams(track, AliESDtrack::kTRDbackup);
+ isGold = kTRUE;
+ }
+ if (!isGold && track->GetNCross()==0&&track->GetChi2()/track->GetNumberOfClusters()<7){ //almost gold track
+ seed->UpdateTrackParams(track, AliESDtrack::kTRDbackup);
+ isGold = kTRUE;
+ }
+ if (!isGold && track->GetBackupTrack()){
+ if (track->GetBackupTrack()->GetNumberOfClusters()>foundMin&&
+ (track->GetBackupTrack()->GetChi2()/(track->GetBackupTrack()->GetNumberOfClusters()+1))<7){
+ seed->UpdateTrackParams(track->GetBackupTrack(), AliESDtrack::kTRDbackup);
+ isGold = kTRUE;
+ }
+ }
+ }
+ }
+ //
+ //Propagation to the TOF (I.Belikov)
+ CookdEdxTimBin(*track);
+ if (track->GetStop()==kFALSE){
+
+ Double_t xtof=371.;
+ Double_t c2=track->GetC()*xtof - track->GetEta();
+ if (TMath::Abs(c2)>=0.99) {
+ delete track;
+ continue;
+ }
+ Double_t xTOF0 = 365. ;
+ PropagateToOuterPlane(*track,xTOF0);
+ //
+ //energy losses taken to the account - check one more time
+ c2=track->GetC()*xtof - track->GetEta();
+ if (TMath::Abs(c2)>=0.99) {
+ delete track;
+ continue;
+ }
- try_again=TIME_BINS_TO_SKIP;
- } else {
- if (try_again==0) break;
+ //
+ Double_t ymax=xtof*TMath::Tan(0.5*AliTRDgeometry::GetAlpha());
+ Double_t y=track->GetYat(xtof);
if (y > ymax) {
- cerr<<"y > ymax: "<<y<<" > "<<ymax<<endl;
- s = (s+1) % ns;
- if (!t.Rotate(alpha)) {
- cerr<<"Failed to rotate, alpha = "<<alpha<<endl;
- return 0;
- }
+ if (!track->Rotate(AliTRDgeometry::GetAlpha())) {
+ delete track;
+ continue;
+ }
} else if (y <-ymax) {
- cerr<<"y < -ymax: "<<y<<" < "<<-ymax<<endl;
- s = (s-1+ns) % ns;
- if (!t.Rotate(-alpha)) {
- cerr<<"Failed to rotate, alpha = "<<alpha<<endl;
- return 0;
- }
+ if (!track->Rotate(-AliTRDgeometry::GetAlpha())) {
+ delete track;
+ continue;
+ }
+ }
+
+ if (track->PropagateTo(xtof)) {
+ seed->UpdateTrackParams(track, AliESDtrack::kTRDout);
+ for (Int_t i=0;i<kNPlane;i++) {
+ seed->SetTRDsignals(track->GetPIDsignals(i),i);
+ seed->SetTRDTimBin(track->GetPIDTimBin(i),i);
+ }
+ seed->SetTRDtrack(new AliTRDtrack(*track));
+ if (track->GetNumberOfClusters()>foundMin) found++;
+ }
+ }else{
+ if (track->GetNumberOfClusters()>15&&track->GetNumberOfClusters()>0.5*expectedClr){
+ seed->UpdateTrackParams(track, AliESDtrack::kTRDout);
+ //seed->SetStatus(AliESDtrack::kTRDStop);
+ for (Int_t i=0;i<kNPlane;i++) {
+ seed->SetTRDsignals(track->GetPIDsignals(i),i);
+ seed->SetTRDTimBin(track->GetPIDTimBin(i),i);
+ }
+ seed->SetTRDtrack(new AliTRDtrack(*track));
+ found++;
}
- try_again--;
}
- }
-
- return 1;
-}
+ seed->SetTRDQuality(track->StatusForTOF());
+ delete track;
+
+ //End of propagation to the TOF
+ //if (foundClr>foundMin)
+ // seed->UpdateTrackParams(track, AliESDtrack::kTRDout);
+
+ }
+
+ cerr<<"Number of seeds: "<<fNseeds<<endl;
+ cerr<<"Number of back propagated TRD tracks: "<<found<<endl;
+
+ fSeeds->Clear(); fNseeds=0;
+ delete [] index;
+ delete [] quality;
+
+ return 0;
+}
//_____________________________________________________________________________
-void AliTRDtracker::GetEvent(const Char_t *name, Int_t nEvent)
+Int_t AliTRDtracker::RefitInward(AliESD* event)
{
- // Opens a ROOT-file with TRD-clusters and reads in the cluster-tree
-
+ //
+ // Refits tracks within the TRD. The ESD event is expected to contain seeds
+ // at the outer part of the TRD.
+ // The tracks are propagated to the innermost time bin
+ // of the TRD and the ESD event is updated
+ // Origin: Thomas KUHR (Thomas.Kuhr@cern.ch)
+ //
- // Connect the AliRoot file containing Geometry, Kine, and Hits
- fInputFile = (TFile*) gROOT->GetListOfFiles()->FindObject(name);
- if (!fInputFile) {
- printf("AliTRDtracker::Open -- ");
- printf("Open the ALIROOT-file %s.\n",name);
- fInputFile = new TFile(name,"UPDATE");
- }
- else {
- printf("AliTRDtracker::Open -- ");
- printf("%s is already open.\n",name);
- }
+ Int_t timeBins = fTrSec[0]->GetNumberOfTimeBins();
+ Float_t foundMin = fgkMinClustersInTrack * timeBins;
+ Int_t nseed = 0;
+ Int_t found = 0;
+ Int_t innerTB = fTrSec[0]->GetInnerTimeBin();
+ AliTRDtrack seed2;
+
+ Int_t n = event->GetNumberOfTracks();
+ for (Int_t i=0; i<n; i++) {
+ AliESDtrack* seed=event->GetTrack(i);
+ new(&seed2) AliTRDtrack(*seed);
+ if (seed2.GetX()<270){
+ seed->UpdateTrackParams(&seed2, AliESDtrack::kTRDbackup); // backup TPC track - only update
+ continue;
+ }
- // Get AliRun object from file or create it if not on file
- //if (!gAlice) {
- gAlice = (AliRun*) fInputFile->Get("gAlice");
- if (gAlice) {
- printf("AliTRDtracker::GetEvent -- ");
- printf("AliRun object found on file.\n");
+ ULong_t status=seed->GetStatus();
+ if ( (status & AliESDtrack::kTRDout ) == 0 ) {
+ continue;
+ }
+ if ( (status & AliESDtrack::kTRDin) != 0 ) {
+ continue;
}
- else {
- printf("AliTRDtracker::GetEvent -- ");
- printf("Could not find AliRun object.\n");
+ nseed++;
+ if (1/seed2.Get1Pt()>5.&& seed2.GetX()>260.) {
+ Double_t oldx = seed2.GetX();
+ seed2.PropagateTo(500.);
+ seed2.ResetCovariance(1.);
+ seed2.PropagateTo(oldx);
+ }
+ else{
+ seed2.ResetCovariance(5.);
}
- //}
- fEvent = nEvent;
+ AliTRDtrack *pt = new AliTRDtrack(seed2,seed2.GetAlpha());
+ UInt_t * indexes2 = seed2.GetIndexes();
+// for (Int_t i=0;i<kNPlane;i++) {
+// pt->SetPIDsignals(seed2.GetPIDsignals(i),i);
+// pt->SetPIDTimBin(seed2.GetPIDTimBin(i),i);
+// }
+
+ UInt_t * indexes3 = pt->GetBackupIndexes();
+ for (Int_t i=0;i<200;i++) {
+ if (indexes2[i]==0) break;
+ indexes3[i] = indexes2[i];
+ }
+ //AliTRDtrack *pt = seed2;
+ AliTRDtrack &t=*pt;
+ FollowProlongation(t, innerTB);
+ if (t.GetNumberOfClusters() >= foundMin) {
+ // UseClusters(&t);
+ //CookLabel(pt, 1-fgkLabelFraction);
+ // t.CookdEdx();
+ }
+ found++;
+// cout<<found<<'\r';
+
+ if(PropagateToTPC(t)) {
+ seed->UpdateTrackParams(pt, AliESDtrack::kTRDrefit);
+ // for (Int_t i=0;i<kNPlane;i++) {
+// seed->SetTRDsignals(pt->GetPIDsignals(i),i);
+// seed->SetTRDTimBin(pt->GetPIDTimBin(i),i);
+// }
+ }else{
+ //if not prolongation to TPC - propagate without update
+ AliTRDtrack* seed2 = new AliTRDtrack(*seed);
+ seed2->ResetCovariance(5.);
+ AliTRDtrack *pt2 = new AliTRDtrack(*seed2,seed2->GetAlpha());
+ delete seed2;
+ if (PropagateToTPC(*pt2)) {
+ pt2->CookdEdx(0.,1.);
+ CookdEdxTimBin(*pt2);
+ seed->UpdateTrackParams(pt2, AliESDtrack::kTRDrefit);
+ // for (Int_t i=0;i<kNPlane;i++) {
+// seed->SetTRDsignals(pt2->GetPIDsignals(i),i);
+// seed->SetTRDTimBin(pt2->GetPIDTimBin(i),i);
+// }
+ }
+ delete pt2;
+ }
+ delete pt;
+ }
- // Import the Trees for the event nEvent in the file
- Int_t nparticles = gAlice->GetEvent(fEvent);
- cerr<<"nparticles = "<<nparticles<<endl;
+ cout<<"Number of loaded seeds: "<<nseed<<endl;
+ cout<<"Number of found tracks from loaded seeds: "<<found<<endl;
- if (nparticles <= 0) {
- printf("AliTRDtracker::GetEvent -- ");
- printf("No entries in the trees for event %d.\n",fEvent);
- }
+ return 0;
- AliTRD *TRD = (AliTRD*) gAlice->GetDetector("TRD");
- fGeom = TRD->GetGeometry();
+}
- Char_t treeName[14];
- sprintf(treeName,"TRDrecPoints%d", nEvent);
- TTree *tree=(TTree*)fInputFile->Get(treeName);
- TBranch *branch=tree->GetBranch("TRDrecPoints");
- Int_t nentr = (Int_t) tree->GetEntries();
- printf("found %d entries in %s tree.\n",nentr,treeName);
+//---------------------------------------------------------------------------
+Int_t AliTRDtracker::FollowProlongation(AliTRDtrack& t, Int_t rf)
+{
+ // Starting from current position on track=t this function tries
+ // to extrapolate the track up to timeBin=0 and to confirm prolongation
+ // if a close cluster is found. Returns the number of clusters
+ // expected to be found in sensitive layers
- for (Int_t i=0; i<nentr; i++) {
- TObjArray *ioArray = new TObjArray(400);
- branch->SetAddress(&ioArray);
- tree->GetEvent(i);
- Int_t npoints = ioArray->GetEntriesFast();
- printf("Read %d rec. points from entry %d \n", npoints, i);
- for(Int_t j=0; j<npoints; j++) {
- AliTRDrecPoint *p=(AliTRDrecPoint*)ioArray->UncheckedAt(j);
- AliTRDcluster *c = new AliTRDcluster(p);
- fClusters->AddLast(c);
- }
- }
+ Float_t wIndex, wTB, wChi2;
+ Float_t wYrt, wYclosest, wYcorrect, wYwindow;
+ Float_t wZrt, wZclosest, wZcorrect, wZwindow;
+ Float_t wPx, wPy, wPz, wC;
+ Double_t px, py, pz;
+ Float_t wSigmaC2, wSigmaTgl2, wSigmaY2, wSigmaZ2;
+ Int_t lastplane = GetLastPlane(&t);
-}
+ Int_t trackIndex = t.GetLabel();
+ Int_t ns=Int_t(2*TMath::Pi()/AliTRDgeometry::GetAlpha()+0.5);
-//_____________________________________________________________________________
-void AliTRDtracker::SetUpSectors(AliTRDtrackingSector *sec)
-{
- // Fills clusters into TRD tracking_sectors
- // Note that the numbering scheme for the TRD tracking_sectors
- // differs from that of TRD sectors
+ Int_t tryAgain=fMaxGap;
- for (Int_t i=0; i<AliTRDgeometry::kNsect; i++) sec[i].SetUp();
+ Double_t alpha=t.GetAlpha();
+ alpha = TVector2::Phi_0_2pi(alpha);
- // Sort clusters into AliTRDtimeBin's within AliTRDtrackSector's
+ Int_t s=Int_t(alpha/AliTRDgeometry::GetAlpha())%AliTRDgeometry::kNsect;
+ Double_t radLength, rho, x, dx, y, ymax, z;
- cerr<<"MakeSeeds: sorting clusters"<<endl;
-
- Int_t ncl=fClusters->GetEntriesFast();
- UInt_t index;
- while (ncl--) {
- printf("\r %d left",ncl);
- AliTRDcluster *c=(AliTRDcluster*)fClusters->UncheckedAt(ncl);
- Int_t detector=c->GetDetector(), local_time_bin=c->GetLocalTimeBin();
- Int_t sector=fGeom->GetSector(detector);
+ Int_t expectedNumberOfClusters = 0;
+ Bool_t lookForCluster;
- Int_t tracking_sector=sector;
- if(sector > 0) tracking_sector = AliTRDgeometry::kNsect - sector;
+ alpha=AliTRDgeometry::GetAlpha(); // note: change in meaning
- Int_t tb=sec[sector].GetTimeBin(detector,local_time_bin);
- index=ncl;
- sec[tracking_sector][tb].InsertCluster(c,index);
- }
- printf("\r\n");
-}
+
+ for (Int_t nr=fTrSec[0]->GetLayerNumber(t.GetX()); nr>rf; nr--) {
+
+ y = t.GetY(); z = t.GetZ();
+
+ // first propagate to the inner surface of the current time bin
+ fTrSec[s]->GetLayer(nr)->GetPropagationParameters(y,z,dx,rho,radLength,lookForCluster);
+ x = fTrSec[s]->GetLayer(nr)->GetX()-dx/2; y = t.GetY(); z = t.GetZ();
+ if(!t.PropagateTo(x,radLength,rho)) break;
+ y = t.GetY();
+ ymax = x*TMath::Tan(0.5*alpha);
+ if (y > ymax) {
+ s = (s+1) % ns;
+ if (!t.Rotate(alpha)) break;
+ if(!t.PropagateTo(x,radLength,rho)) break;
+ } else if (y <-ymax) {
+ s = (s-1+ns) % ns;
+ if (!t.Rotate(-alpha)) break;
+ if(!t.PropagateTo(x,radLength,rho)) break;
+ }
+
+ y = t.GetY(); z = t.GetZ();
+
+ // now propagate to the middle plane of the next time bin
+ fTrSec[s]->GetLayer(nr-1)->GetPropagationParameters(y,z,dx,rho,radLength,lookForCluster);
+ x = fTrSec[s]->GetLayer(nr-1)->GetX(); y = t.GetY(); z = t.GetZ();
+ if(!t.PropagateTo(x,radLength,rho)) break;
+ y = t.GetY();
+ ymax = x*TMath::Tan(0.5*alpha);
+ if (y > ymax) {
+ s = (s+1) % ns;
+ if (!t.Rotate(alpha)) break;
+ if(!t.PropagateTo(x,radLength,rho)) break;
+ } else if (y <-ymax) {
+ s = (s-1+ns) % ns;
+ if (!t.Rotate(-alpha)) break;
+ if(!t.PropagateTo(x,radLength,rho)) break;
+ }
+
+
+ if(lookForCluster) {
+
+ expectedNumberOfClusters++;
+ wIndex = (Float_t) t.GetLabel();
+ wTB = nr;
+
+ AliTRDpropagationLayer& timeBin=*(fTrSec[s]->GetLayer(nr-1));
+
+ Double_t sy2=ExpectedSigmaY2(x,t.GetTgl(),t.GetPt());
+ Double_t sz2=ExpectedSigmaZ2(x,t.GetTgl());
+
+ Double_t road;
+ if((t.GetSigmaY2() + sy2) > 0) road=10.*sqrt(t.GetSigmaY2() + sy2);
+ else return expectedNumberOfClusters;
+
+ wYrt = (Float_t) y;
+ wZrt = (Float_t) z;
+ wYwindow = (Float_t) road;
+ t.GetPxPyPz(px,py,pz);
+ wPx = (Float_t) px;
+ wPy = (Float_t) py;
+ wPz = (Float_t) pz;
+ wC = (Float_t) t.GetC();
+ wSigmaC2 = (Float_t) t.GetSigmaC2();
+ wSigmaTgl2 = (Float_t) t.GetSigmaTgl2();
+ wSigmaY2 = (Float_t) t.GetSigmaY2();
+ wSigmaZ2 = (Float_t) t.GetSigmaZ2();
+ wChi2 = -1;
+
+
+ AliTRDcluster *cl=0;
+ UInt_t index=0;
+
+ Double_t maxChi2=fgkMaxChi2;
+
+ wYclosest = 12345678;
+ wYcorrect = 12345678;
+ wZclosest = 12345678;
+ wZcorrect = 12345678;
+ wZwindow = TMath::Sqrt(2.25 * 12 * sz2);
+
+ // Find the closest correct cluster for debugging purposes
+ if (timeBin&&fVocal) {
+ Float_t minDY = 1000000;
+ for (Int_t i=0; i<timeBin; i++) {
+ AliTRDcluster* c=(AliTRDcluster*)(timeBin[i]);
+ if((c->GetLabel(0) != trackIndex) &&
+ (c->GetLabel(1) != trackIndex) &&
+ (c->GetLabel(2) != trackIndex)) continue;
+ if(TMath::Abs(c->GetY() - y) > minDY) continue;
+ minDY = TMath::Abs(c->GetY() - y);
+ wYcorrect = c->GetY();
+ wZcorrect = c->GetZ();
+
+ Double_t h01 = GetTiltFactor(c);
+ wChi2 = t.GetPredictedChi2(c, h01);
+ }
+ }
+
+ // Now go for the real cluster search
+
+ if (timeBin) {
+ //
+ //find cluster in history
+ cl =0;
+
+ AliTRDcluster * cl0 = timeBin[0];
+ if (!cl0) {
+ continue;
+ }
+ Int_t plane = fGeom->GetPlane(cl0->GetDetector());
+ if (plane>lastplane) continue;
+ Int_t timebin = cl0->GetLocalTimeBin();
+ AliTRDcluster * cl2= GetCluster(&t,plane, timebin);
+ if (cl2) {
+ cl =cl2;
+ Double_t h01 = GetTiltFactor(cl);
+ maxChi2=t.GetPredictedChi2(cl,h01);
+ }
+ if ((!cl) && road>fgkWideRoad) {
+ //if (t.GetNumberOfClusters()>4)
+ // cerr<<t.GetNumberOfClusters()
+ // <<"FindProlongation warning: Too broad road !\n";
+ continue;
+ }
+
+ /*
+ if(!cl){
+ Int_t maxn = timeBin;
+ for (Int_t i=timeBin.Find(y-road); i<maxn; i++) {
+ AliTRDcluster* c=(AliTRDcluster*)(timeBin[i]);
+ if (c->GetY() > y+road) break;
+ if (c->IsUsed() > 0) continue;
+ if((c->GetZ()-z)*(c->GetZ()-z) > 3 * sz2) continue;
+
+ Double_t h01 = GetTiltFactor(c);
+ Double_t chi2=t.GetPredictedChi2(c,h01);
+
+ if (chi2 > maxChi2) continue;
+ maxChi2=chi2;
+ cl=c;
+ index=timeBin.GetIndex(i);
+ }
+ }
+ if(!cl) {
+ Int_t maxn = timeBin;
+ for (Int_t i=timeBin.Find(y-road); i<maxn; i++) {
+ AliTRDcluster* c=(AliTRDcluster*)(timeBin[i]);
+
+ if (c->GetY() > y+road) break;
+ if (c->IsUsed() > 0) continue;
+ if((c->GetZ()-z)*(c->GetZ()-z) > 12 * sz2) continue;
+
+ Double_t h01 = GetTiltFactor(c);
+ Double_t chi2=t.GetPredictedChi2(c, h01);
+
+ if (chi2 > maxChi2) continue;
+ maxChi2=chi2;
+ cl=c;
+ index=timeBin.GetIndex(i);
+ }
+ }
+ */
+ if (cl) {
+
+ wYclosest = cl->GetY();
+ wZclosest = cl->GetZ();
+ Double_t h01 = GetTiltFactor(cl);
+
+ if (cl->GetNPads()<5)
+ t.SetSampledEdx(cl->GetQ()/dx);
+ //printf("Track position\t%f\t%f\t%f\n",t.GetX(),t.GetY(),t.GetZ());
+ //printf("Cluster position\t%d\t%f\t%f\n",cl->GetLocalTimeBin(),cl->GetY(),cl->GetZ());
+ Int_t det = cl->GetDetector();
+ Int_t plane = fGeom->GetPlane(det);
+
+ if(!t.UpdateMI(cl,maxChi2,index,h01,plane)) {
+ //if(!t.Update(cl,maxChi2,index,h01)) {
+ //if(!tryAgain--) return 0;
+ }
+ else tryAgain=fMaxGap;
+ }
+ else {
+ //if (tryAgain==0) break;
+ tryAgain--;
+ }
+ }
+ }
+ }
+ return expectedNumberOfClusters;
+
+
+}
-//_____________________________________________________________________________
-void AliTRDtracker::MakeSeeds(Int_t inner, Int_t outer)
+//___________________________________________________________________
+
+Int_t AliTRDtracker::FollowBackProlongation(AliTRDtrack& t)
{
- // Creates track seeds using clusters in timeBins=i1,i2
+ // Starting from current radial position of track <t> this function
+ // extrapolates the track up to outer timebin and in the sensitive
+ // layers confirms prolongation if a close cluster is found.
+ // Returns the number of clusters expected to be found in sensitive layers
+
+
+ Float_t wIndex, wTB, wChi2;
+ Float_t wYrt, wYclosest, wYcorrect, wYwindow;
+ Float_t wZrt, wZclosest, wZcorrect, wZwindow;
+ Float_t wSigmaC2, wSigmaTgl2, wSigmaY2, wSigmaZ2;
+
+ Int_t trackIndex = t.GetLabel();
+ Int_t tryAgain=fMaxGap;
+
+ Double_t alpha=t.GetAlpha();
+ TVector2::Phi_0_2pi(alpha);
+
+ Int_t s;
+
+ Int_t clusters[1000];
+ for (Int_t i=0;i<1000;i++) clusters[i]=-1;
+
+ Int_t outerTB = fTrSec[0]->GetOuterTimeBin();
+ Double_t radLength, rho, x, dx, y, ymax = 0, z;
+ Bool_t lookForCluster;
+
+ Int_t expectedNumberOfClusters = 0;
+ x = t.GetX();
+
+ alpha=AliTRDgeometry::GetAlpha(); // note: change in meaning
+
+ Int_t nRefPlane = fgkFirstPlane;
+ Bool_t isNewLayer = kFALSE;
+
+ Double_t chi2;
+ Double_t minDY;
+ Int_t zone =-10;
+ Int_t nr;
+ for (nr=fTrSec[0]->GetLayerNumber(t.GetX()); nr<outerTB+1; nr++) {
+
+ y = t.GetY();
+ z = t.GetZ();
+
+ // first propagate to the outer surface of the current time bin
+
+ s = t.GetSector();
+ fTrSec[s]->GetLayer(nr)->GetPropagationParameters(y,z,dx,rho,radLength,lookForCluster);
+ x = fTrSec[s]->GetLayer(nr)->GetX()+dx/2;
+ y = t.GetY();
+ z = t.GetZ();
+
+ if(!t.PropagateTo(x,radLength,rho)) break;
+ // if (!AdjustSector(&t)) break;
+ //
+ // MI -fix untill correct material desription will be implemented
+ //
+ Float_t angle = t.GetAlpha(); // MI - if rotation - we go through the material
+ if (!AdjustSector(&t)) break;
+ Int_t cross = kFALSE;
+ Int_t crosz = kFALSE;
+ if (TMath::Abs(angle - t.GetAlpha())>0.000001) cross = kTRUE; //better to stop track
+ Int_t currentzone = fTrSec[s]->GetLayer(nr)->GetZone(z);
+ if (currentzone==-10) {cross = kTRUE,crosz=kTRUE;} // we are in the frame
+ if (currentzone>-10){ // layer knows where we are
+ if (zone==-10) zone = currentzone;
+ if (zone!=currentzone) {
+ cross=kTRUE;
+ crosz=kTRUE;
+ }
+ }
+ if (TMath::Abs(t.GetSnp())>0.8 && t.GetBackupTrack()==0) t.MakeBackupTrack();
+ if (cross) {
+ if (t.GetNCross()==0 && t.GetBackupTrack()==0) t.MakeBackupTrack();
+ t.IncCross();
+ if (t.GetNCross()>4) break;
+ }
+ //
+ //
+ s = t.GetSector();
+ if (!t.PropagateTo(x,radLength,rho)) break;
- Int_t i2 = inner, i1=outer;
+ y = t.GetY();
+ z = t.GetZ();
- if (!fClusters) return;
+ // Barrel Tracks [SR, 04.04.2003]
- AliTRDtrackingSector fTrSec[AliTRDgeometry::kNsect];
- SetUpSectors(fTrSec);
+ s = t.GetSector();
+ if (fTrSec[s]->GetLayer(nr)->IsSensitive() !=
+ fTrSec[s]->GetLayer(nr+1)->IsSensitive() ) {
- // find seeds
+// if (IsStoringBarrel()) StoreBarrelTrack(&t, nRefPlane++, kTrackBack);
+ }
- Double_t x[5], c[15];
- Int_t max_sec=AliTRDgeometry::kNsect;
+ if (fTrSec[s]->GetLayer(nr-1)->IsSensitive() &&
+ ! fTrSec[s]->GetLayer(nr)->IsSensitive()) {
+ isNewLayer = kTRUE;
+ } else {isNewLayer = kFALSE;}
- Double_t alpha=AliTRDgeometry::GetAlpha();
- Double_t shift=AliTRDgeometry::GetAlpha()/2.;
- Double_t cs=cos(alpha), sn=sin(alpha);
+ y = t.GetY();
+ z = t.GetZ();
+
+ // now propagate to the middle plane of the next time bin
+ fTrSec[s]->GetLayer(nr+1)->GetPropagationParameters(y,z,dx,rho,radLength,lookForCluster);
+ if (crosz){
+ rho = 1000*2.7; radLength = 24.01; //TEMPORARY - aluminium in between z - will be detected using GeoModeler in future versions
+ }
+ x = fTrSec[s]->GetLayer(nr+1)->GetX();
+ if(!t.PropagateTo(x,radLength,rho)) break;
+ if (!AdjustSector(&t)) break;
+ s = t.GetSector();
+ if(!t.PropagateTo(x,radLength,rho)) break;
+
+ if (TMath::Abs(t.GetSnp())>0.95) break;
+
+ y = t.GetY();
+ z = t.GetZ();
+
+ if(fVocal) printf("nr+1=%d, x %f, z %f, y %f, ymax %f\n",nr+1,x,z,y,ymax);
+ // printf("label %d, pl %d, lookForCluster %d \n",
+ // trackIndex, nr+1, lookForCluster);
+
+ if(lookForCluster) {
+// if (clusters[nr]==-1) {
+// FindClusters(s,nr,nr+30,&t,clusters);
+// }
+
+ expectedNumberOfClusters++;
+ t.fNExpected++;
+ if (t.fX>345) t.fNExpectedLast++;
+ wIndex = (Float_t) t.GetLabel();
+ wTB = fTrSec[s]->GetLayer(nr+1)->GetTimeBinIndex();
+
+ AliTRDpropagationLayer& timeBin=*(fTrSec[s]->GetLayer(nr+1));
+ Double_t sy2=ExpectedSigmaY2(t.GetX(),t.GetTgl(),t.GetPt());
+ Double_t sz2=ExpectedSigmaZ2(t.GetX(),t.GetTgl());
+ if((t.GetSigmaY2() + sy2) < 0) break;
+ Double_t road = 10.*sqrt(t.GetSigmaY2() + sy2);
+ Double_t y=t.GetY(), z=t.GetZ();
+
+ wYrt = (Float_t) y;
+ wZrt = (Float_t) z;
+ wYwindow = (Float_t) road;
+ wSigmaC2 = (Float_t) t.GetSigmaC2();
+ wSigmaTgl2 = (Float_t) t.GetSigmaTgl2();
+ wSigmaY2 = (Float_t) t.GetSigmaY2();
+ wSigmaZ2 = (Float_t) t.GetSigmaZ2();
+ wChi2 = -1;
+
+ if (road>fgkWideRoad) {
+ if (t.GetNumberOfClusters()>4)
+ cerr<<t.GetNumberOfClusters()
+ <<"FindProlongation warning: Too broad road !\n";
+ return 0;
+ }
+
+ AliTRDcluster *cl=0;
+ UInt_t index=0;
+
+ Double_t maxChi2=fgkMaxChi2;
+
+ if (isNewLayer) {
+ road = 3 * road;
+ //sz2 = 3 * sz2;
+ maxChi2 = 10 * fgkMaxChi2;
+ }
+
+ if (nRefPlane == fgkFirstPlane) maxChi2 = 20 * fgkMaxChi2;
+ if (nRefPlane == fgkFirstPlane+2) maxChi2 = 15 * fgkMaxChi2;
+ if (t.GetNRotate() > 0) maxChi2 = 3 * maxChi2;
+
+
+ wYclosest = 12345678;
+ wYcorrect = 12345678;
+ wZclosest = 12345678;
+ wZcorrect = 12345678;
+ wZwindow = TMath::Sqrt(2.25 * 12 * sz2);
+
+ // Find the closest correct cluster for debugging purposes
+ if (timeBin&&fVocal) {
+ minDY = 1000000;
+ for (Int_t i=0; i<timeBin; i++) {
+ AliTRDcluster* c=(AliTRDcluster*)(timeBin[i]);
+ if((c->GetLabel(0) != trackIndex) &&
+ (c->GetLabel(1) != trackIndex) &&
+ (c->GetLabel(2) != trackIndex)) continue;
+ if(TMath::Abs(c->GetY() - y) > minDY) continue;
+ //minDY = TMath::Abs(c->GetY() - y);
+ minDY = c->GetY() - y;
+ wYcorrect = c->GetY();
+ wZcorrect = c->GetZ();
+
+ Double_t h01 = GetTiltFactor(c);
+ wChi2 = t.GetPredictedChi2(c, h01);
+ }
+ }
+
+ // Now go for the real cluster search
+
+ if (timeBin) {
+ /*
+ if (clusters[nr+1]>0) {
+ index = clusters[nr+1];
+ cl = (AliTRDcluster*)GetCluster(index);
+ Double_t h01 = GetTiltFactor(cl);
+ maxChi2=t.GetPredictedChi2(cl,h01);
+ }
+ */
+
+ if (!cl){
+ Int_t maxn = timeBin;
+ for (Int_t i=timeBin.Find(y-road); i<maxn; i++) {
+ AliTRDcluster* c=(AliTRDcluster*)(timeBin[i]);
+ if (c->GetY() > y+road) break;
+ if (c->IsUsed() > 0) continue;
+ if((c->GetZ()-z)*(c->GetZ()-z) > 3 * sz2) continue;
+
+ Double_t h01 = GetTiltFactor(c);
+ chi2=t.GetPredictedChi2(c,h01);
+
+ if (chi2 > maxChi2) continue;
+ maxChi2=chi2;
+ cl=c;
+ index=timeBin.GetIndex(i);
+
+ //check is correct
+ if((c->GetLabel(0) != trackIndex) &&
+ (c->GetLabel(1) != trackIndex) &&
+ (c->GetLabel(2) != trackIndex)) t.AddNWrong();
+ }
+ }
+ if(!cl) {
+ Int_t maxn = timeBin;
+ for (Int_t i=timeBin.Find(y-road); i<maxn; i++) {
+ AliTRDcluster* c=(AliTRDcluster*)(timeBin[i]);
+
+ if (c->GetY() > y+road) break;
+ if (c->IsUsed() > 0) continue;
+ // if((c->GetZ()-z)*(c->GetZ()-z) > 2.25 * 12 * sz2) continue;
+ if((c->GetZ()-z)*(c->GetZ()-z) > 12. * sz2) continue;
+ //
+ //
+ Double_t h01 = GetTiltFactor(c);
+ chi2=t.GetPredictedChi2(c,h01);
+
+ if (chi2 > maxChi2) continue;
+ maxChi2=chi2;
+ cl=c;
+ index=timeBin.GetIndex(i);
+ }
+ }
+
+ if (cl) {
+ wYclosest = cl->GetY();
+ wZclosest = cl->GetZ();
+ if (cl->GetNPads()<5)
+ t.SetSampledEdx(cl->GetQ()/dx);
+ Double_t h01 = GetTiltFactor(cl);
+ Int_t det = cl->GetDetector();
+ Int_t plane = fGeom->GetPlane(det);
+ if (t.fX>345){
+ t.fNLast++;
+ t.fChi2Last+=maxChi2;
+ }
+ if(!t.UpdateMI(cl,maxChi2,index,h01,plane)) {
+ if(!t.Update(cl,maxChi2,index,h01)) {
+ if(!tryAgain--) return 0;
+ }
+ }
+ else tryAgain=fMaxGap;
+ }
+ else {
+ if (tryAgain==0) break;
+ tryAgain--;
+ }
+
+ isNewLayer = kFALSE;
- Double_t x1 =fTrSec[0].GetX(i1);
- Double_t xx2=fTrSec[0].GetX(i2);
+ }
+ }
+ }
+ if (nr<outerTB)
+ t.SetStop(kTRUE);
+ else
+ t.SetStop(kFALSE);
+ return expectedNumberOfClusters;
- for (Int_t ns=0; ns<max_sec; ns++) {
- Int_t nl=fTrSec[(ns-1+max_sec)%max_sec][i2];
- Int_t nm=fTrSec[ns][i2];
- Int_t nu=fTrSec[(ns+1)%max_sec][i2];
+}
- AliTRDtimeBin& r1=fTrSec[ns][i1];
+//---------------------------------------------------------------------------
+Int_t AliTRDtracker::Refit(AliTRDtrack& t, Int_t rf)
+{
+ // Starting from current position on track=t this function tries
+ // to extrapolate the track up to timeBin=0 and to reuse already
+ // assigned clusters. Returns the number of clusters
+ // expected to be found in sensitive layers
+ // get indices of assigned clusters for each layer
+ // Origin: Thomas KUHR (Thomas.Kuhr@cern.ch)
+
+ Int_t iCluster[90];
+ for (Int_t i = 0; i < 90; i++) iCluster[i] = 0;
+ for (Int_t i = 0; i < t.GetNumberOfClusters(); i++) {
+ Int_t index = t.GetClusterIndex(i);
+ AliTRDcluster *cl=(AliTRDcluster*) GetCluster(index);
+ if (!cl) continue;
+ Int_t detector=cl->GetDetector();
+ Int_t localTimeBin=cl->GetLocalTimeBin();
+ Int_t sector=fGeom->GetSector(detector);
+ Int_t plane=fGeom->GetPlane(detector);
- for (Int_t is=0; is < r1; is++) {
- Double_t y1=r1[is]->GetY(), z1=r1[is]->GetZ();
+ Int_t trackingSector = CookSectorIndex(sector);
- for (Int_t js=0; js < nl+nm+nu; js++) {
- const AliTRDcluster *cl;
- Double_t x2, y2, z2;
- Double_t x3=0.,y3=0.;
+ Int_t gtb = fTrSec[trackingSector]->CookTimeBinIndex(plane,localTimeBin);
+ if(gtb < 0) continue;
+ Int_t layer = fTrSec[trackingSector]->GetLayerNumber(gtb);
+ iCluster[layer] = index;
+ }
+ t.ResetClusters();
- if (js<nl) {
- AliTRDtimeBin& r2=fTrSec[(ns-1+max_sec)%max_sec][i2];
- cl=r2[js];
- y2=cl->GetY(); z2=cl->GetZ();
+ Int_t ns=Int_t(2*TMath::Pi()/AliTRDgeometry::GetAlpha()+0.5);
- x2= xx2*cs+y2*sn;
- y2=-xx2*sn+y2*cs;
+ Double_t alpha=t.GetAlpha();
+ alpha = TVector2::Phi_0_2pi(alpha);
- } else
- if (js<nl+nm) {
- AliTRDtimeBin& r2=fTrSec[ns][i2];
- cl=r2[js-nl];
- x2=xx2; y2=cl->GetY(); z2=cl->GetZ();
- } else {
- AliTRDtimeBin& r2=fTrSec[(ns+1)%max_sec][i2];
- cl=r2[js-nl-nm];
- y2=cl->GetY(); z2=cl->GetZ();
+ Int_t s=Int_t(alpha/AliTRDgeometry::GetAlpha())%AliTRDgeometry::kNsect;
+ Double_t radLength, rho, x, dx, y, ymax, z;
- x2=xx2*cs-y2*sn;
- y2=xx2*sn+y2*cs;
+ Int_t expectedNumberOfClusters = 0;
+ Bool_t lookForCluster;
- }
+ alpha=AliTRDgeometry::GetAlpha(); // note: change in meaning
- Double_t zz=z1 - z1/x1*(x1-x2);
-
- if (TMath::Abs(zz-z2)>30.) continue;
+
+ for (Int_t nr=fTrSec[0]->GetLayerNumber(t.GetX()); nr>rf; nr--) {
+
+ y = t.GetY(); z = t.GetZ();
+
+ // first propagate to the inner surface of the current time bin
+ fTrSec[s]->GetLayer(nr)->GetPropagationParameters(y,z,dx,rho,radLength,lookForCluster);
+ x = fTrSec[s]->GetLayer(nr)->GetX()-dx/2; y = t.GetY(); z = t.GetZ();
+ if(!t.PropagateTo(x,radLength,rho)) break;
+ y = t.GetY();
+ ymax = x*TMath::Tan(0.5*alpha);
+ if (y > ymax) {
+ s = (s+1) % ns;
+ if (!t.Rotate(alpha)) break;
+ if(!t.PropagateTo(x,radLength,rho)) break;
+ } else if (y <-ymax) {
+ s = (s-1+ns) % ns;
+ if (!t.Rotate(-alpha)) break;
+ if(!t.PropagateTo(x,radLength,rho)) break;
+ }
+
+ y = t.GetY(); z = t.GetZ();
+
+ // now propagate to the middle plane of the next time bin
+ fTrSec[s]->GetLayer(nr-1)->GetPropagationParameters(y,z,dx,rho,radLength,lookForCluster);
+ x = fTrSec[s]->GetLayer(nr-1)->GetX(); y = t.GetY(); z = t.GetZ();
+ if(!t.PropagateTo(x,radLength,rho)) break;
+ y = t.GetY();
+ ymax = x*TMath::Tan(0.5*alpha);
+ if (y > ymax) {
+ s = (s+1) % ns;
+ if (!t.Rotate(alpha)) break;
+ if(!t.PropagateTo(x,radLength,rho)) break;
+ } else if (y <-ymax) {
+ s = (s-1+ns) % ns;
+ if (!t.Rotate(-alpha)) break;
+ if(!t.PropagateTo(x,radLength,rho)) break;
+ }
+
+ if(lookForCluster) expectedNumberOfClusters++;
+
+ // use assigned cluster
+ if (!iCluster[nr-1]) continue;
+ AliTRDcluster *cl=(AliTRDcluster*)GetCluster(iCluster[nr-1]);
+ Double_t h01 = GetTiltFactor(cl);
+ Double_t chi2=t.GetPredictedChi2(cl, h01);
+ if (cl->GetNPads()<5) t.SetSampledEdx(cl->GetQ()/dx);
+
+ //t.SetSampledEdx(cl->GetQ()/dx,t.GetNumberOfClusters());
+ t.Update(cl,chi2,iCluster[nr-1],h01);
+ }
- Double_t d=(x2-x1)*(0.-y2)-(0.-x2)*(y2-y1);
- if (d==0.) {cerr<<"TRD MakeSeeds: Straight seed !\n"; continue;}
+ return expectedNumberOfClusters;
+}
- x[0]=y1;
- x[1]=z1;
- x[2]=f1trd(x1,y1,x2,y2,x3,y3);
+//___________________________________________________________________
- if (TMath::Abs(x[2]) >= 0.01) continue;
+Int_t AliTRDtracker::PropagateToOuterPlane(AliTRDtrack& t, Double_t xToGo)
+{
+ // Starting from current radial position of track <t> this function
+ // extrapolates the track up to radial position <xToGo>.
+ // Returns 1 if track reaches the plane, and 0 otherwise
+
+ Int_t ns=Int_t(2*TMath::Pi()/AliTRDgeometry::GetAlpha()+0.5);
+
+ Double_t alpha=t.GetAlpha();
+
+ if (alpha > 2.*TMath::Pi()) alpha -= 2.*TMath::Pi();
+ if (alpha < 0. ) alpha += 2.*TMath::Pi();
+
+ Int_t s=Int_t(alpha/AliTRDgeometry::GetAlpha())%AliTRDgeometry::kNsect;
+
+ Bool_t lookForCluster;
+ Double_t radLength, rho, x, dx, y, ymax, z;
+
+ x = t.GetX();
+
+ alpha=AliTRDgeometry::GetAlpha(); // note: change in meaning
+
+ Int_t plToGo = fTrSec[0]->GetLayerNumber(xToGo);
+
+ for (Int_t nr=fTrSec[0]->GetLayerNumber(x); nr<plToGo; nr++) {
+
+ y = t.GetY(); z = t.GetZ();
+
+ // first propagate to the outer surface of the current time bin
+ fTrSec[s]->GetLayer(nr)->GetPropagationParameters(y,z,dx,rho,radLength,lookForCluster);
+ x = fTrSec[s]->GetLayer(nr)->GetX()+dx/2; y = t.GetY(); z = t.GetZ();
+ if(!t.PropagateTo(x,radLength,rho)) return 0;
+ y = t.GetY();
+ ymax = x*TMath::Tan(0.5*alpha);
+ if (y > ymax) {
+ s = (s+1) % ns;
+ if (!t.Rotate(alpha)) return 0;
+ } else if (y <-ymax) {
+ s = (s-1+ns) % ns;
+ if (!t.Rotate(-alpha)) return 0;
+ }
+ if(!t.PropagateTo(x,radLength,rho)) return 0;
+
+ y = t.GetY(); z = t.GetZ();
+
+ // now propagate to the middle plane of the next time bin
+ fTrSec[s]->GetLayer(nr+1)->GetPropagationParameters(y,z,dx,rho,radLength,lookForCluster);
+ x = fTrSec[s]->GetLayer(nr+1)->GetX(); y = t.GetY(); z = t.GetZ();
+ if(!t.PropagateTo(x,radLength,rho)) return 0;
+ y = t.GetY();
+ ymax = x*TMath::Tan(0.5*alpha);
+ if (y > ymax) {
+ s = (s+1) % ns;
+ if (!t.Rotate(alpha)) return 0;
+ } else if (y <-ymax) {
+ s = (s-1+ns) % ns;
+ if (!t.Rotate(-alpha)) return 0;
+ }
+ if(!t.PropagateTo(x,radLength,rho)) return 0;
+ }
+ return 1;
+}
- x[3]=f2trd(x1,y1,x2,y2,x3,y3);
+//___________________________________________________________________
- if (TMath::Abs(x[2]*x1-x[3]) >= 0.99999) continue;
+Int_t AliTRDtracker::PropagateToTPC(AliTRDtrack& t)
+{
+ // Starting from current radial position of track <t> this function
+ // extrapolates the track up to radial position of the outermost
+ // padrow of the TPC.
+ // Returns 1 if track reaches the TPC, and 0 otherwise
- x[4]=f3trd(x1,y1,x2,y2,z1,z2);
+ //Int_t ns=Int_t(2*TMath::Pi()/AliTRDgeometry::GetAlpha()+0.5);
- if (TMath::Abs(x[4]) > 1.2) continue;
+ Double_t alpha=t.GetAlpha();
+ alpha = TVector2::Phi_0_2pi(alpha);
- Double_t a=asin(x[3]);
- Double_t zv=z1 - x[4]/x[2]*(a+asin(x[2]*x1-x[3]));
- if (TMath::Abs(zv)>200.) continue;
+ Int_t s=Int_t(alpha/AliTRDgeometry::GetAlpha())%AliTRDgeometry::kNsect;
- Double_t sy1=r1[is]->GetSigmaY2(), sz1=r1[is]->GetSigmaZ2()*12;
- Double_t sy2=cl->GetSigmaY2(), sz2=cl->GetSigmaZ2()*12;
- Double_t sy3=100*0.025, sy=0.1, sz=0.1;
+ Bool_t lookForCluster;
+ Double_t radLength, rho, x, dx, y, /*ymax,*/ z;
- Double_t f20=(f1trd(x1,y1+sy,x2,y2,x3,y3)-x[2])/sy;
- Double_t f22=(f1trd(x1,y1,x2,y2+sy,x3,y3)-x[2])/sy;
- Double_t f24=(f1trd(x1,y1,x2,y2,x3,y3+sy)-x[2])/sy;
- Double_t f30=(f2trd(x1,y1+sy,x2,y2,x3,y3)-x[3])/sy;
- Double_t f32=(f2trd(x1,y1,x2,y2+sy,x3,y3)-x[3])/sy;
- Double_t f34=(f2trd(x1,y1,x2,y2,x3,y3+sy)-x[3])/sy;
- Double_t f40=(f3trd(x1,y1+sy,x2,y2,z1,z2)-x[4])/sy;
- Double_t f41=(f3trd(x1,y1,x2,y2,z1+sz,z2)-x[4])/sz;
- Double_t f42=(f3trd(x1,y1,x2,y2+sy,z1,z2)-x[4])/sy;
- Double_t f43=(f3trd(x1,y1,x2,y2,z1,z2+sz)-x[4])/sz;
+ x = t.GetX();
- c[0]=sy1;
- c[1]=0.; c[2]=sz1;
- c[3]=f20*sy1; c[4]=0.; c[5]=f20*sy1*f20+f22*sy2*f22+f24*sy3*f24;
- c[6]=f30*sy1; c[7]=0.; c[8]=f30*sy1*f20+f32*sy2*f22+f34*sy3*f24;
- c[9]=f30*sy1*f30+f32*sy2*f32+f34*sy3*f34;
- c[10]=f40*sy1; c[11]=f41*sz1; c[12]=f40*sy1*f20+f42*sy2*f22;
- c[13]=f40*sy1*f30+f42*sy2*f32;
- c[14]=f40*sy1*f40+f41*sz1*f41+f42*sy2*f42+f43*sz2*f43;
+ alpha=AliTRDgeometry::GetAlpha(); // note: change in meaning
+ Int_t plTPC = fTrSec[0]->GetLayerNumber(246.055);
- UInt_t index=r1.GetIndex(is);
- AliTRDseed *track=new AliTRDseed(index, x, c, x1, ns*alpha+shift);
+ for (Int_t nr=fTrSec[0]->GetLayerNumber(x); nr>plTPC; nr--) {
- // Float_t l=fTrSec->GetPitch();
- // track->SetSampledEdx(r1[is]->fQ/l,0);
+ y = t.GetY();
+ z = t.GetZ();
- Int_t rc=FindProlongation(*track,fTrSec,ns,i2);
-
- if ((rc < 0) || (track->GetNclusters() < (i1-i2)/2) ) delete track;
- else {
- fSeeds->AddLast(track); fNseeds++;
- cerr<<"found seed "<<fNseeds<<endl;
- }
- }
- }
- }
+ // first propagate to the outer surface of the current time bin
+ fTrSec[s]->GetLayer(nr)->GetPropagationParameters(y,z,dx,rho,radLength,lookForCluster);
+ x = fTrSec[s]->GetLayer(nr)->GetX()-dx/2;
+
+ if(!t.PropagateTo(x,radLength,rho)) return 0;
+ AdjustSector(&t);
+ if(!t.PropagateTo(x,radLength,rho)) return 0;
- // delete[] fTrSec;
+ y = t.GetY();
+ z = t.GetZ();
- fSeeds->Sort();
-}
+ // now propagate to the middle plane of the next time bin
+ fTrSec[s]->GetLayer(nr-1)->GetPropagationParameters(y,z,dx,rho,radLength,lookForCluster);
+ x = fTrSec[s]->GetLayer(nr-1)->GetX();
+
+ if(!t.PropagateTo(x,radLength,rho)) return 0;
+ AdjustSector(&t);
+ if(!t.PropagateTo(x,radLength,rho)) return 0;
+ }
+ return 1;
+}
-//___________________________________________________________________
-void AliTRDtracker::FindTracks()
+//_____________________________________________________________________________
+Int_t AliTRDtracker::LoadClusters(TTree *cTree)
{
- if (!fClusters) return;
+ // Fills clusters into TRD tracking_sectors
+ // Note that the numbering scheme for the TRD tracking_sectors
+ // differs from that of TRD sectors
+ cout<<"\n Read Sectors clusters"<<endl;
+ if (ReadClusters(fClusters,cTree)) {
+ Error("LoadClusters","Problem with reading the clusters !");
+ return 1;
+ }
+ Int_t ncl=fClusters->GetEntriesFast();
+ fNclusters=ncl;
+ cout<<"\n LoadSectors: sorting "<<ncl<<" clusters"<<endl;
+
+ UInt_t index;
+ for (Int_t ichamber=0;ichamber<5;ichamber++)
+ for (Int_t isector=0;isector<18;isector++){
+ fHoles[ichamber][isector]=kTRUE;
+ }
+
+
+ while (ncl--) {
+// printf("\r %d left ",ncl);
+ AliTRDcluster *c=(AliTRDcluster*)fClusters->UncheckedAt(ncl);
+ Int_t detector=c->GetDetector();
+ Int_t localTimeBin=c->GetLocalTimeBin();
+ Int_t sector=fGeom->GetSector(detector);
+ Int_t plane=fGeom->GetPlane(detector);
+
+ Int_t trackingSector = CookSectorIndex(sector);
+ if (c->GetLabel(0)>0){
+ Int_t chamber = fGeom->GetChamber(detector);
+ fHoles[chamber][trackingSector]=kFALSE;
+ }
+
+ Int_t gtb = fTrSec[trackingSector]->CookTimeBinIndex(plane,localTimeBin);
+ if(gtb < 0) continue;
+ Int_t layer = fTrSec[trackingSector]->GetLayerNumber(gtb);
+
+ index=ncl;
+ fTrSec[trackingSector]->GetLayer(layer)->InsertCluster(c,index);
+ }
+ // printf("\r\n");
+ //
+ //
+ /*
+ for (Int_t isector=0;isector<18;isector++){
+ for (Int_t ichamber=0;ichamber<5;ichamber++)
+ if (fHoles[ichamber][isector]!=fGeom->IsHole(0,ichamber,17-isector))
+ printf("Problem \t%d\t%d\t%d\t%d\n",isector,ichamber,fHoles[ichamber][isector],
+ fGeom->IsHole(0,ichamber,17-isector));
+ }
+ */
+ return 0;
+}
- AliTRDtrackingSector fTrSec[AliTRDgeometry::kNsect];
- SetUpSectors(fTrSec);
+//_____________________________________________________________________________
+void AliTRDtracker::UnloadClusters()
+{
+ //
+ // Clears the arrays of clusters and tracks. Resets sectors and timebins
+ //
- // find tracks
+ Int_t i, nentr;
- Int_t num_of_time_bins = fTrSec[0].GetNtimeBins();
- Int_t nseed=fSeeds->GetEntriesFast();
+ nentr = fClusters->GetEntriesFast();
+ for (i = 0; i < nentr; i++) delete fClusters->RemoveAt(i);
+ fNclusters = 0;
- Int_t nSeedClusters;
- for (Int_t i=0; i<nseed; i++) {
- cerr<<"FindTracks: seed "<<i+1<<" out of "<<nseed<<endl;
+ nentr = fSeeds->GetEntriesFast();
+ for (i = 0; i < nentr; i++) delete fSeeds->RemoveAt(i);
- AliTRDseed& t=*((AliTRDseed*)fSeeds->UncheckedAt(i));
+ nentr = fTracks->GetEntriesFast();
+ for (i = 0; i < nentr; i++) delete fTracks->RemoveAt(i);
- nSeedClusters = t.GetNclusters();
- Double_t alpha=AliTRDgeometry::GetAlpha();
+ Int_t nsec = AliTRDgeometry::kNsect;
- if (alpha > 2.*TMath::Pi()) alpha -= 2.*TMath::Pi();
- if (alpha < 0. ) alpha += 2.*TMath::Pi();
- Int_t ns=Int_t(alpha/AliTRDgeometry::GetAlpha())%AliTRDgeometry::kNsect;
+ for (i = 0; i < nsec; i++) {
+ for(Int_t pl = 0; pl < fTrSec[i]->GetNumberOfLayers(); pl++) {
+ fTrSec[i]->GetLayer(pl)->Clear();
+ }
+ }
- if (FindProlongation(t,fTrSec,ns)) {
- cerr<<"No of clusters in the track = "<<t.GetNclusters()<<endl;
- if ((t.GetNclusters() >= Int_t(0.3*num_of_time_bins)) &&
- ((t.GetNclusters()-nSeedClusters)>60)) {
- t.CookdEdx();
- Int_t label = GetTrackLabel(t);
- t.SetLabel(label);
- AliTRDtrack* pt=&t;
- fTracks->AddLast(pt); fNtracks++;
- UseClusters(t);
- cerr<<"found track "<<fNtracks<<endl;
- }
- }
- }
}
-//__________________________________________________________________
-void AliTRDtracker::UseClusters(AliTRDseed t) {
- Int_t ncl=t.GetNclusters();
- for (Int_t i=0; i<ncl; i++) {
- Int_t index = t.GetClusterIndex(i);
- AliTRDcluster *c=(AliTRDcluster*)fClusters->UncheckedAt(index);
- c->Use();
+//__________________________________________________________________________
+void AliTRDtracker::MakeSeeds(Int_t inner, Int_t outer, Int_t turn)
+{
+ // Creates track seeds using clusters in timeBins=i1,i2
+
+ if(turn > 2) {
+ cerr<<"MakeSeeds: turn "<<turn<<" exceeds the limit of 2"<<endl;
+ return;
}
+
+ Double_t x[5], c[15];
+ Int_t maxSec=AliTRDgeometry::kNsect;
+
+ Double_t alpha=AliTRDgeometry::GetAlpha();
+ Double_t shift=AliTRDgeometry::GetAlpha()/2.;
+ Double_t cs=cos(alpha), sn=sin(alpha);
+ Double_t cs2=cos(2.*alpha), sn2=sin(2.*alpha);
+
+
+ Int_t i2 = fTrSec[0]->GetLayerNumber(inner);
+ Int_t i1 = fTrSec[0]->GetLayerNumber(outer);
+
+ Double_t x1 =fTrSec[0]->GetX(i1);
+ Double_t xx2=fTrSec[0]->GetX(i2);
+
+ for (Int_t ns=0; ns<maxSec; ns++) {
+
+ Int_t nl2 = *(fTrSec[(ns-2+maxSec)%maxSec]->GetLayer(i2));
+ Int_t nl=(*fTrSec[(ns-1+maxSec)%maxSec]->GetLayer(i2));
+ Int_t nm=(*fTrSec[ns]->GetLayer(i2));
+ Int_t nu=(*fTrSec[(ns+1)%maxSec]->GetLayer(i2));
+ Int_t nu2=(*fTrSec[(ns+2)%maxSec]->GetLayer(i2));
+
+ AliTRDpropagationLayer& r1=*(fTrSec[ns]->GetLayer(i1));
+
+ for (Int_t is=0; is < r1; is++) {
+ Double_t y1=r1[is]->GetY(), z1=r1[is]->GetZ();
+
+ for (Int_t js=0; js < nl2+nl+nm+nu+nu2; js++) {
+
+ const AliTRDcluster *cl;
+ Double_t x2, y2, z2;
+ Double_t x3=0., y3=0.;
+
+ if (js<nl2) {
+ if(turn != 2) continue;
+ AliTRDpropagationLayer& r2=*(fTrSec[(ns-2+maxSec)%maxSec]->GetLayer(i2));
+ cl=r2[js];
+ y2=cl->GetY(); z2=cl->GetZ();
+
+ x2= xx2*cs2+y2*sn2;
+ y2=-xx2*sn2+y2*cs2;
+ }
+ else if (js<nl2+nl) {
+ if(turn != 1) continue;
+ AliTRDpropagationLayer& r2=*(fTrSec[(ns-1+maxSec)%maxSec]->GetLayer(i2));
+ cl=r2[js-nl2];
+ y2=cl->GetY(); z2=cl->GetZ();
+
+ x2= xx2*cs+y2*sn;
+ y2=-xx2*sn+y2*cs;
+ }
+ else if (js<nl2+nl+nm) {
+ if(turn != 1) continue;
+ AliTRDpropagationLayer& r2=*(fTrSec[ns]->GetLayer(i2));
+ cl=r2[js-nl2-nl];
+ x2=xx2; y2=cl->GetY(); z2=cl->GetZ();
+ }
+ else if (js<nl2+nl+nm+nu) {
+ if(turn != 1) continue;
+ AliTRDpropagationLayer& r2=*(fTrSec[(ns+1)%maxSec]->GetLayer(i2));
+ cl=r2[js-nl2-nl-nm];
+ y2=cl->GetY(); z2=cl->GetZ();
+
+ x2=xx2*cs-y2*sn;
+ y2=xx2*sn+y2*cs;
+ }
+ else {
+ if(turn != 2) continue;
+ AliTRDpropagationLayer& r2=*(fTrSec[(ns+2)%maxSec]->GetLayer(i2));
+ cl=r2[js-nl2-nl-nm-nu];
+ y2=cl->GetY(); z2=cl->GetZ();
+
+ x2=xx2*cs2-y2*sn2;
+ y2=xx2*sn2+y2*cs2;
+ }
+
+ if(TMath::Abs(z1-z2) > fgkMaxSeedDeltaZ12) continue;
+
+ Double_t zz=z1 - z1/x1*(x1-x2);
+
+ if (TMath::Abs(zz-z2)>fgkMaxSeedDeltaZ) continue;
+
+ Double_t d=(x2-x1)*(0.-y2)-(0.-x2)*(y2-y1);
+ if (d==0.) {cerr<<"TRD MakeSeeds: Straight seed !\n"; continue;}
+
+ x[0]=y1;
+ x[1]=z1;
+ x[4]=f1trd(x1,y1,x2,y2,x3,y3);
+
+ if (TMath::Abs(x[4]) > fgkMaxSeedC) continue;
+
+ x[2]=f2trd(x1,y1,x2,y2,x3,y3);
+
+ if (TMath::Abs(x[4]*x1-x[2]) >= 0.99999) continue;
+
+ x[3]=f3trd(x1,y1,x2,y2,z1,z2);
+
+ if (TMath::Abs(x[3]) > fgkMaxSeedTan) continue;
+
+ Double_t a=asin(x[2]);
+ Double_t zv=z1 - x[3]/x[4]*(a+asin(x[4]*x1-x[2]));
+
+ if (TMath::Abs(zv)>fgkMaxSeedVertexZ) continue;
+
+ Double_t sy1=r1[is]->GetSigmaY2(), sz1=r1[is]->GetSigmaZ2();
+ Double_t sy2=cl->GetSigmaY2(), sz2=cl->GetSigmaZ2();
+ Double_t sy3=fgkSeedErrorSY3, sy=fgkSeedErrorSY, sz=fgkSeedErrorSZ;
+
+ // Tilt changes
+ Double_t h01 = GetTiltFactor(r1[is]);
+ Double_t xuFactor = 100.;
+ if(fNoTilt) {
+ h01 = 0;
+ xuFactor = 1;
+ }
+
+ sy1=sy1+sz1*h01*h01;
+ Double_t syz=sz1*(-h01);
+ // end of tilt changes
+
+ Double_t f40=(f1trd(x1,y1+sy,x2,y2,x3,y3)-x[4])/sy;
+ Double_t f42=(f1trd(x1,y1,x2,y2+sy,x3,y3)-x[4])/sy;
+ Double_t f43=(f1trd(x1,y1,x2,y2,x3,y3+sy)-x[4])/sy;
+ Double_t f20=(f2trd(x1,y1+sy,x2,y2,x3,y3)-x[2])/sy;
+ Double_t f22=(f2trd(x1,y1,x2,y2+sy,x3,y3)-x[2])/sy;
+ Double_t f23=(f2trd(x1,y1,x2,y2,x3,y3+sy)-x[2])/sy;
+ Double_t f30=(f3trd(x1,y1+sy,x2,y2,z1,z2)-x[3])/sy;
+ Double_t f31=(f3trd(x1,y1,x2,y2,z1+sz,z2)-x[3])/sz;
+ Double_t f32=(f3trd(x1,y1,x2,y2+sy,z1,z2)-x[3])/sy;
+ Double_t f34=(f3trd(x1,y1,x2,y2,z1,z2+sz)-x[3])/sz;
+
+
+ c[0]=sy1;
+ // c[1]=0.; c[2]=sz1;
+ c[1]=syz; c[2]=sz1*xuFactor;
+ c[3]=f20*sy1; c[4]=0.; c[5]=f20*sy1*f20+f22*sy2*f22+f23*sy3*f23;
+ c[6]=f30*sy1; c[7]=f31*sz1; c[8]=f30*sy1*f20+f32*sy2*f22;
+ c[9]=f30*sy1*f30+f31*sz1*f31+f32*sy2*f32+f34*sz2*f34;
+ c[10]=f40*sy1; c[11]=0.; c[12]=f40*sy1*f20+f42*sy2*f22+f43*sy3*f23;
+ c[13]=f30*sy1*f40+f32*sy2*f42;
+ c[14]=f40*sy1*f40+f42*sy2*f42+f43*sy3*f43;
+
+ UInt_t index=r1.GetIndex(is);
+
+ AliTRDtrack *track=new AliTRDtrack(r1[is],index,x,c,x1,ns*alpha+shift);
+
+ Int_t rc=FollowProlongation(*track, i2);
+
+ if ((rc < 1) ||
+ (track->GetNumberOfClusters() <
+ (outer-inner)*fgkMinClustersInSeed)) delete track;
+ else {
+ fSeeds->AddLast(track); fNseeds++;
+// cerr<<"\r found seed "<<fNseeds;
+ }
+ }
+ }
+ }
+}
+
+//_____________________________________________________________________________
+Int_t AliTRDtracker::ReadClusters(TObjArray *array, TTree *ClusterTree) const
+{
+ //
+ // Reads AliTRDclusters (option >= 0) or AliTRDrecPoints (option < 0)
+ // from the file. The names of the cluster tree and branches
+ // should match the ones used in AliTRDclusterizer::WriteClusters()
+ //
+ Int_t nsize = Int_t(ClusterTree->GetTotBytes()/(sizeof(AliTRDcluster)));
+ TObjArray *clusterArray = new TObjArray(nsize+1000);
+
+ TBranch *branch=ClusterTree->GetBranch("TRDcluster");
+ if (!branch) {
+ Error("ReadClusters","Can't get the branch !");
+ return 1;
+ }
+ branch->SetAddress(&clusterArray);
+
+ Int_t nEntries = (Int_t) ClusterTree->GetEntries();
+ // printf("found %d entries in %s.\n",nEntries,ClusterTree->GetName());
+
+ // Loop through all entries in the tree
+ Int_t nbytes = 0;
+ AliTRDcluster *c = 0;
+ // printf("\n");
+ for (Int_t iEntry = 0; iEntry < nEntries; iEntry++) {
+
+ // Import the tree
+ nbytes += ClusterTree->GetEvent(iEntry);
+
+ // Get the number of points in the detector
+ Int_t nCluster = clusterArray->GetEntriesFast();
+// printf("\r Read %d clusters from entry %d", nCluster, iEntry);
+
+ // Loop through all TRD digits
+ for (Int_t iCluster = 0; iCluster < nCluster; iCluster++) {
+ c = (AliTRDcluster*)clusterArray->UncheckedAt(iCluster);
+ if (c->GetNPads()>3&&(iCluster%3>0)) {
+ delete clusterArray->RemoveAt(iCluster);
+ continue;
+ }
+ // AliTRDcluster *co = new AliTRDcluster(*c); //remove unnecesary coping - + clusters are together in memory
+ AliTRDcluster *co = c;
+ co->SetSigmaY2(c->GetSigmaY2() * fSY2corr);
+ Int_t ltb = co->GetLocalTimeBin();
+ if(ltb == 19) co->SetSigmaZ2(c->GetSigmaZ2());
+ else if(fNoTilt) co->SetSigmaZ2(c->GetSigmaZ2() * fSZ2corr);
+ array->AddLast(co);
+ // delete clusterArray->RemoveAt(iCluster);
+ clusterArray->RemoveAt(iCluster);
+ }
+ }
+ cout<<"Allocated"<<nsize<<"\tLoaded"<<array->GetEntriesFast()<<"\n";
+
+ delete clusterArray;
+
+ return 0;
}
//__________________________________________________________________
-Int_t AliTRDtracker::GetTrackLabel(AliTRDseed t) {
+void AliTRDtracker::CookLabel(AliKalmanTrack* pt, Float_t wrong) const
+{
+ //
+ // This cooks a label. Mmmmh, smells good...
+ //
Int_t label=123456789, index, i, j;
- Int_t ncl=t.GetNclusters();
- const Int_t range=300;
- Bool_t label_added;
+ Int_t ncl=pt->GetNumberOfClusters();
+ const Int_t kRange = fTrSec[0]->GetOuterTimeBin()+1;
+
+ Bool_t labelAdded;
- Int_t s[range][2];
- for (i=0; i<range; i++) {
+ // Int_t s[kRange][2];
+ Int_t **s = new Int_t* [kRange];
+ for (i=0; i<kRange; i++) {
+ s[i] = new Int_t[2];
+ }
+ for (i=0; i<kRange; i++) {
s[i][0]=-1;
s[i][1]=0;
}
Int_t t0,t1,t2;
for (i=0; i<ncl; i++) {
- index=t.GetClusterIndex(i);
+ index=pt->GetClusterIndex(i);
AliTRDcluster *c=(AliTRDcluster*)fClusters->UncheckedAt(index);
- t0=c->GetTrackIndex(0);
- t1=c->GetTrackIndex(1);
- t2=c->GetTrackIndex(2);
+ t0=c->GetLabel(0);
+ t1=c->GetLabel(1);
+ t2=c->GetLabel(2);
}
for (i=0; i<ncl; i++) {
- index=t.GetClusterIndex(i);
+ index=pt->GetClusterIndex(i);
AliTRDcluster *c=(AliTRDcluster*)fClusters->UncheckedAt(index);
for (Int_t k=0; k<3; k++) {
- label=c->GetTrackIndex(k);
- label_added=kFALSE; j=0;
+ label=c->GetLabel(k);
+ labelAdded=kFALSE; j=0;
if (label >= 0) {
- while ( (!label_added) && ( j < range ) ) {
- if (s[j][0]==label || s[j][1]==0) {
- s[j][0]=label;
- s[j][1]=s[j][1]+1;
- label_added=kTRUE;
- }
- j++;
- }
+ while ( (!labelAdded) && ( j < kRange ) ) {
+ if (s[j][0]==label || s[j][1]==0) {
+ s[j][0]=label;
+ s[j][1]=s[j][1]+1;
+ labelAdded=kTRUE;
+ }
+ j++;
+ }
}
}
}
-
Int_t max=0;
label = -123456789;
- for (i=0; i<range; i++) {
+ for (i=0; i<kRange; i++) {
if (s[i][1]>max) {
max=s[i][1]; label=s[i][0];
}
}
- if(max > ncl/2) return label;
- else return -1;
+
+ for (i=0; i<kRange; i++) {
+ delete []s[i];
+ }
+
+ delete []s;
+
+ if ((1.- Float_t(max)/ncl) > wrong) label=-label;
+
+ pt->SetLabel(label);
+
}
-//___________________________________________________________________
-Int_t AliTRDtracker::WriteTracks() {
+//__________________________________________________________________
+void AliTRDtracker::UseClusters(const AliKalmanTrack* t, Int_t from) const
+{
+ //
+ // Use clusters, but don't abuse them!
+ //
+
+ Int_t ncl=t->GetNumberOfClusters();
+ for (Int_t i=from; i<ncl; i++) {
+ Int_t index = t->GetClusterIndex(i);
+ AliTRDcluster *c=(AliTRDcluster*)fClusters->UncheckedAt(index);
+ c->Use();
+ }
+}
+
+
+//_____________________________________________________________________
+Double_t AliTRDtracker::ExpectedSigmaY2(Double_t , Double_t , Double_t ) const
+{
+ // Parametrised "expected" error of the cluster reconstruction in Y
+
+ Double_t s = 0.08 * 0.08;
+ return s;
+}
+
+//_____________________________________________________________________
+Double_t AliTRDtracker::ExpectedSigmaZ2(Double_t , Double_t ) const
+{
+ // Parametrised "expected" error of the cluster reconstruction in Z
+
+ Double_t s = 9 * 9 /12.;
+ return s;
+}
+
+//_____________________________________________________________________
+Double_t AliTRDtracker::GetX(Int_t sector, Int_t plane, Int_t localTB) const
+{
+ //
+ // Returns radial position which corresponds to time bin <localTB>
+ // in tracking sector <sector> and plane <plane>
+ //
+
+ Int_t index = fTrSec[sector]->CookTimeBinIndex(plane, localTB);
+ Int_t pl = fTrSec[sector]->GetLayerNumber(index);
+ return fTrSec[sector]->GetLayer(pl)->GetX();
- TDirectory *savedir=gDirectory;
+}
- TFile *out=TFile::Open("AliTRDtracks.root","RECREATE");
- TTree tracktree("TreeT","Tree with TRD tracks");
+//_______________________________________________________
+AliTRDtracker::AliTRDpropagationLayer::AliTRDpropagationLayer(Double_t x,
+ Double_t dx, Double_t rho, Double_t radLength, Int_t tbIndex)
+{
+ //
+ // AliTRDpropagationLayer constructor
+ //
- AliTRDtrack *iotrack=0;
- tracktree.Branch("tracks","AliTRDtrack",&iotrack,32000,0);
+ fN = 0; fX = x; fdX = dx; fRho = rho; fX0 = radLength;
+ fClusters = NULL; fIndex = NULL; fTimeBinIndex = tbIndex;
- Int_t ntracks=fTracks->GetEntriesFast();
- for (Int_t i=0; i<ntracks; i++) {
- AliTRDtrack *pt=(AliTRDtrack*)fTracks->UncheckedAt(i);
- iotrack=pt;
- tracktree.Fill();
- cerr<<"WriteTracks: put track "<<i<<" in the tree"<<endl;
+ for(Int_t i=0; i < (Int_t) kZones; i++) {
+ fZc[i]=0; fZmax[i] = 0;
}
- tracktree.Write();
- out->Close();
+ fYmax = 0;
- savedir->cd();
+ if(fTimeBinIndex >= 0) {
+ fClusters = new AliTRDcluster*[kMaxClusterPerTimeBin];
+ fIndex = new UInt_t[kMaxClusterPerTimeBin];
+ }
+
+ for (Int_t i=0;i<5;i++) fIsHole[i] = kFALSE;
+ fHole = kFALSE;
+ fHoleZc = 0;
+ fHoleZmax = 0;
+ fHoleYc = 0;
+ fHoleYmax = 0;
+ fHoleRho = 0;
+ fHoleX0 = 0;
- cerr<<"WriteTracks: done"<<endl;
- return 0;
}
+//_______________________________________________________
+void AliTRDtracker::AliTRDpropagationLayer::SetHole(
+ Double_t Zmax, Double_t Ymax, Double_t rho,
+ Double_t radLength, Double_t Yc, Double_t Zc)
+{
+ //
+ // Sets hole in the layer
+ //
+ fHole = kTRUE;
+ fHoleZc = Zc;
+ fHoleZmax = Zmax;
+ fHoleYc = Yc;
+ fHoleYmax = Ymax;
+ fHoleRho = rho;
+ fHoleX0 = radLength;
+}
+
+
+//_______________________________________________________
+AliTRDtracker::AliTRDtrackingSector::AliTRDtrackingSector(AliTRDgeometry* geo, Int_t gs, AliTRDparameter* par)
+{
+ //
+ // AliTRDtrackingSector Constructor
+ //
+ AliTRDpadPlane *padPlane = 0;
-//_____________________________________________________________________________
-void AliTRDtracker::ReadClusters(TObjArray *array, const Char_t *filename
- , Int_t nEvent, Int_t option)
+ fGeom = geo;
+ fPar = par;
+ fGeomSector = gs;
+ fTzeroShift = 0.13;
+ fN = 0;
+ //
+ // get holes description from geometry
+ Bool_t holes[AliTRDgeometry::kNcham];
+ //printf("sector\t%d\t",gs);
+ for (Int_t icham=0; icham<AliTRDgeometry::kNcham;icham++){
+ holes[icham] = fGeom->IsHole(0,icham,gs);
+ //printf("%d",holes[icham]);
+ }
+ //printf("\n");
+
+ for(UInt_t i=0; i < kMaxTimeBinIndex; i++) fTimeBinIndex[i] = -1;
+
+
+ AliTRDpropagationLayer* ppl;
+
+ Double_t x, xin, xout, dx, rho, radLength;
+ Int_t steps;
+
+ // set time bins in the gas of the TPC
+
+ xin = 246.055; xout = 254.055; steps = 20; dx = (xout-xin)/steps;
+ rho = 0.9e-3; radLength = 28.94;
+
+ for(Int_t i=0; i<steps; i++) {
+ x = xin + i*dx + dx/2;
+ ppl = new AliTRDpropagationLayer(x,dx,rho,radLength,-1);
+ InsertLayer(ppl);
+ }
+
+ // set time bins in the outer field cage vessel
+
+ dx = 50e-4; xin = xout; xout = xin + dx; rho = 1.71; radLength = 44.77; // Tedlar
+ ppl = new AliTRDpropagationLayer(xin+dx/2,dx,rho,radLength,-1);
+ InsertLayer(ppl);
+
+ dx = 0.02; xin = xout; xout = xin + dx; rho = 1.45; radLength = 44.86; // prepreg
+ ppl = new AliTRDpropagationLayer(xin+dx/2,dx,rho,radLength,-1);
+ InsertLayer(ppl);
+
+ dx = 2.; xin = xout; xout = xin + dx; rho = 1.45*0.02; radLength = 41.28; // Nomex
+ steps = 5; dx = (xout - xin)/steps;
+ for(Int_t i=0; i<steps; i++) {
+ x = xin + i*dx + dx/2;
+ ppl = new AliTRDpropagationLayer(x,dx,rho,radLength,-1);
+ InsertLayer(ppl);
+ }
+
+ dx = 0.02; xin = xout; xout = xin + dx; rho = 1.45; radLength = 44.86; // prepreg
+ ppl = new AliTRDpropagationLayer(xin+dx/2,dx,rho,radLength,-1);
+ InsertLayer(ppl);
+
+ dx = 50e-4; xin = xout; xout = xin + dx; rho = 1.71; radLength = 44.77; // Tedlar
+ ppl = new AliTRDpropagationLayer(xin+dx/2,dx,rho,radLength,-1);
+ InsertLayer(ppl);
+
+
+ // set time bins in CO2
+
+ xin = xout; xout = 275.0;
+ steps = 50; dx = (xout - xin)/steps;
+ rho = 1.977e-3; radLength = 36.2;
+
+ for(Int_t i=0; i<steps; i++) {
+ x = xin + i*dx + dx/2;
+ ppl = new AliTRDpropagationLayer(x,dx,rho,radLength,-1);
+ InsertLayer(ppl);
+ }
+
+ // set time bins in the outer containment vessel
+
+ dx = 50e-4; xin = xout; xout = xin + dx; rho = 2.7; radLength = 24.01; // Al
+ ppl = new AliTRDpropagationLayer(xin+dx/2,dx,rho,radLength,-1);
+ InsertLayer(ppl);
+
+ dx = 50e-4; xin = xout; xout = xin + dx; rho = 1.71; radLength = 44.77; // Tedlar
+ ppl = new AliTRDpropagationLayer(xin+dx/2,dx,rho,radLength,-1);
+ InsertLayer(ppl);
+
+ dx = 0.06; xin = xout; xout = xin + dx; rho = 1.45; radLength = 44.86; // prepreg
+ ppl = new AliTRDpropagationLayer(xin+dx/2,dx,rho,radLength,-1);
+ InsertLayer(ppl);
+
+ dx = 3.; xin = xout; xout = xin + dx; rho = 1.45*0.02; radLength = 41.28; // Nomex
+ steps = 10; dx = (xout - xin)/steps;
+ for(Int_t i=0; i<steps; i++) {
+ x = xin + i*dx + dx/2;
+ ppl = new AliTRDpropagationLayer(x,dx,rho,radLength,-1);
+ InsertLayer(ppl);
+ }
+
+ dx = 0.06; xin = xout; xout = xin + dx; rho = 1.45; radLength = 44.86; // prepreg
+ ppl = new AliTRDpropagationLayer(xin+dx/2,dx,rho,radLength,-1);
+ InsertLayer(ppl);
+
+ dx = 50e-4; xin = xout; xout = xin + dx; rho = 1.71; radLength = 44.77; // Tedlar
+ ppl = new AliTRDpropagationLayer(xin+dx/2,dx,rho,radLength,-1);
+ InsertLayer(ppl);
+
+ dx = 50e-4; xin = xout; xout = xin + dx; rho = 2.7; radLength = 24.01; // Al
+ ppl = new AliTRDpropagationLayer(xin+dx/2,dx,rho,radLength,-1);
+ InsertLayer(ppl);
+
+ Double_t xtrd = (Double_t) fGeom->Rmin();
+
+ // add layers between TPC and TRD (Air temporarily)
+ xin = xout; xout = xtrd;
+ steps = 50; dx = (xout - xin)/steps;
+ rho = 1.2e-3; radLength = 36.66;
+
+ for(Int_t i=0; i<steps; i++) {
+ x = xin + i*dx + dx/2;
+ ppl = new AliTRDpropagationLayer(x,dx,rho,radLength,-1);
+ InsertLayer(ppl);
+ }
+
+
+ // Double_t alpha=AliTRDgeometry::GetAlpha();
+
+ // add layers for each of the planes
+
+ Double_t dxRo = (Double_t) fGeom->CroHght(); // Rohacell
+ Double_t dxSpace = (Double_t) fGeom->Cspace(); // Spacing between planes
+ Double_t dxAmp = (Double_t) fGeom->CamHght(); // Amplification region
+ Double_t dxDrift = (Double_t) fGeom->CdrHght(); // Drift region
+ Double_t dxRad = (Double_t) fGeom->CraHght(); // Radiator
+ Double_t dxTEC = dxRad + dxDrift + dxAmp + dxRo;
+ Double_t dxPlane = dxTEC + dxSpace;
+
+ Int_t tb, tbIndex;
+ const Int_t kNchambers = AliTRDgeometry::Ncham();
+ Double_t ymax = 0;
+ //, holeYmax = 0;
+ Double_t ymaxsensitive=0;
+ Double_t *zc = new Double_t[kNchambers];
+ Double_t *zmax = new Double_t[kNchambers];
+ Double_t *zmaxsensitive = new Double_t[kNchambers];
+ // Double_t holeZmax = 1000.; // the whole sector is missing
+
+ for(Int_t plane = 0; plane < AliTRDgeometry::Nplan(); plane++) {
+ //
+ // Radiator
+ xin = xtrd + plane * dxPlane; xout = xin + dxRad;
+ steps = 12; dx = (xout - xin)/steps; rho = 0.074; radLength = 40.6;
+ for(Int_t i=0; i<steps; i++) {
+ x = xin + i*dx + dx/2;
+ ppl = new AliTRDpropagationLayer(x,dx,rho,radLength,-1);
+ InsertLayer(ppl);
+ }
+
+ ymax = fGeom->GetChamberWidth(plane)/2.;
+ //
+ // Modidified for new pad plane class, 22.04.05 (C.B.)
+ // ymaxsensitive = (fPar->GetColPadSize(plane)*fPar->GetColMax(plane)-4)/2.;
+ padPlane = fPar->GetPadPlane(plane,0);
+ ymaxsensitive = (padPlane->GetColSize(1)*padPlane->GetNcols()-4)/2.;
+
+ for(Int_t ch = 0; ch < kNchambers; ch++) {
+ zmax[ch] = fGeom->GetChamberLength(plane,ch)/2;
+ //
+ // Modidified for new pad plane class, 22.04.05 (C.B.)
+ //Float_t pad = fPar->GetRowPadSize(plane,ch,0);
+ Float_t pad = padPlane->GetRowSize(1);
+ Float_t row0 = fPar->GetRow0(plane,ch,0);
+ Int_t nPads = fPar->GetRowMax(plane,ch,0);
+ zmaxsensitive[ch] = Float_t(nPads)*pad/2.;
+ // zc[ch] = (pad * nPads)/2 + row0 - pad/2;
+ zc[ch] = (pad * nPads)/2 + row0;
+ //zc[ch] = row0+zmax[ch]-AliTRDgeometry::RpadW();
+
+ }
+
+ dx = fPar->GetDriftVelocity()
+ / fPar->GetSamplingFrequency();
+ rho = 0.00295 * 0.85; radLength = 11.0;
+
+ Double_t x0 = (Double_t) fPar->GetTime0(plane);
+ Double_t xbottom = x0 - dxDrift;
+ Double_t xtop = x0 + dxAmp;
+ //
+ // Amplification region
+ steps = (Int_t) (dxAmp/dx);
+
+ for(tb = 0; tb < steps; tb++) {
+ x = x0 + tb * dx + dx/2;
+ tbIndex = CookTimeBinIndex(plane, -tb-1);
+ ppl = new AliTRDpropagationLayer(x,dx,rho,radLength,tbIndex);
+ ppl->SetYmax(ymax,ymaxsensitive);
+ ppl->SetZ(zc, zmax, zmaxsensitive);
+ ppl->SetHoles(holes);
+ InsertLayer(ppl);
+ }
+ tbIndex = CookTimeBinIndex(plane, -steps);
+ x = (x + dx/2 + xtop)/2;
+ dx = 2*(xtop-x);
+ ppl = new AliTRDpropagationLayer(x,dx,rho,radLength,tbIndex);
+ ppl->SetYmax(ymax,ymaxsensitive);
+ ppl->SetZ(zc, zmax,zmaxsensitive);
+ ppl->SetHoles(holes);
+ InsertLayer(ppl);
+
+ // Drift region
+ dx = fPar->GetDriftVelocity()
+ / fPar->GetSamplingFrequency();
+ steps = (Int_t) (dxDrift/dx);
+
+ for(tb = 0; tb < steps; tb++) {
+ x = x0 - tb * dx - dx/2;
+ tbIndex = CookTimeBinIndex(plane, tb);
+
+ ppl = new AliTRDpropagationLayer(x,dx,rho,radLength,tbIndex);
+ ppl->SetYmax(ymax,ymaxsensitive);
+ ppl->SetZ(zc, zmax, zmaxsensitive);
+ ppl->SetHoles(holes);
+ InsertLayer(ppl);
+ }
+ tbIndex = CookTimeBinIndex(plane, steps);
+ x = (x - dx/2 + xbottom)/2;
+ dx = 2*(x-xbottom);
+ ppl = new AliTRDpropagationLayer(x,dx,rho,radLength,tbIndex);
+ ppl->SetYmax(ymax,ymaxsensitive);
+ ppl->SetZ(zc, zmax, zmaxsensitive);
+ ppl->SetHoles(holes);
+ InsertLayer(ppl);
+
+ // Pad Plane
+ xin = xtop; dx = 0.025; xout = xin + dx; rho = 1.7; radLength = 33.0;
+ ppl = new AliTRDpropagationLayer(xin+dx/2,dx,rho,radLength,-1);
+ ppl->SetYmax(ymax,ymaxsensitive);
+ ppl->SetZ(zc, zmax,zmax);
+ ppl->SetHoles(holes);
+ InsertLayer(ppl);
+
+ // Rohacell
+ xin = xout; xout = xtrd + (plane + 1) * dxPlane - dxSpace;
+ steps = 5; dx = (xout - xin)/steps; rho = 0.074; radLength = 40.6;
+ for(Int_t i=0; i<steps; i++) {
+ x = xin + i*dx + dx/2;
+ ppl = new AliTRDpropagationLayer(x,dx,rho,radLength,-1);
+ ppl->SetYmax(ymax,ymaxsensitive);
+ ppl->SetZ(zc, zmax,zmax);
+ ppl->SetHoles(holes);
+ InsertLayer(ppl);
+ }
+
+ // Space between the chambers, air
+ xin = xout; xout = xtrd + (plane + 1) * dxPlane;
+ steps = 5; dx = (xout - xin)/steps; rho = 1.29e-3; radLength = 36.66;
+ for(Int_t i=0; i<steps; i++) {
+ x = xin + i*dx + dx/2;
+ ppl = new AliTRDpropagationLayer(x,dx,rho,radLength,-1);
+ InsertLayer(ppl);
+ }
+ }
+
+ // Space between the TRD and RICH
+ Double_t xRICH = 500.;
+ xin = xout; xout = xRICH;
+ steps = 200; dx = (xout - xin)/steps; rho = 1.29e-3; radLength = 36.66;
+ for(Int_t i=0; i<steps; i++) {
+ x = xin + i*dx + dx/2;
+ ppl = new AliTRDpropagationLayer(x,dx,rho,radLength,-1);
+ InsertLayer(ppl);
+ }
+
+ MapTimeBinLayers();
+ delete [] zc;
+ delete [] zmax;
+ delete [] zmaxsensitive;
+
+}
+
+//______________________________________________________
+
+Int_t AliTRDtracker::AliTRDtrackingSector::CookTimeBinIndex(Int_t plane, Int_t localTB) const
{
//
- // Reads AliTRDclusters (option >= 0) or AliTRDrecPoints (option < 0)
- // from the file. The names of the cluster tree and branches
- // should match the ones used in AliTRDclusterizer::WriteClusters()
+ // depending on the digitization parameters calculates "global"
+ // time bin index for timebin <localTB> in plane <plane>
//
- TDirectory *savedir=gDirectory;
+ Double_t dxAmp = (Double_t) fGeom->CamHght(); // Amplification region
+ Double_t dxDrift = (Double_t) fGeom->CdrHght(); // Drift region
+ Double_t dx = (Double_t) fPar->GetDriftVelocity()
+ / fPar->GetSamplingFrequency();
+
+ Int_t tbAmp = fPar->GetTimeBefore();
+ Int_t maxAmp = (Int_t) ((dxAmp+0.000001)/dx);
+ if(kTRUE) maxAmp = 0; // intentional until we change parameter class
+ Int_t tbDrift = fPar->GetTimeMax();
+ Int_t maxDrift = (Int_t) ((dxDrift+0.000001)/dx);
+
+ Int_t tbPerPlane = TMath::Min(tbAmp,maxAmp) + TMath::Min(tbDrift,maxDrift);
+
+ Int_t gtb = (plane+1) * tbPerPlane - localTB - 1 - TMath::Min(tbAmp,maxAmp);
+
+ if((localTB < 0) &&
+ (TMath::Abs(localTB) > TMath::Min(tbAmp,maxAmp))) return -1;
+ if(localTB >= TMath::Min(tbDrift,maxDrift)) return -1;
+
+ return gtb;
+
+
+}
+
+//______________________________________________________
- TFile *file = TFile::Open(filename);
- if (!file->IsOpen()) {printf("Can't open file %s !\n",filename); return;}
+void AliTRDtracker::AliTRDtrackingSector::MapTimeBinLayers()
+{
+ //
+ // For all sensitive time bins sets corresponding layer index
+ // in the array fTimeBins
+ //
- Char_t treeName[14];
- sprintf(treeName,"TRDrecPoints%d", nEvent);
+ Int_t index;
- TTree *tree=(TTree*)file->Get(treeName);
- TBranch *branch=tree->GetBranch("TRDrecPoints");
- Int_t nentr = (Int_t) tree->GetEntries();
- printf("found %d entries in %s tree.\n",nentr,treeName);
+ for(Int_t i = 0; i < fN; i++) {
+ index = fLayers[i]->GetTimeBinIndex();
+
+ // printf("gtb %d -> pl %d -> x %f \n", index, i, fLayers[i]->GetX());
+
+ if(index < 0) continue;
+ if(index >= (Int_t) kMaxTimeBinIndex) {
+ printf("*** AliTRDtracker::MapTimeBinLayers: \n");
+ printf(" index %d exceeds allowed maximum of %d!\n",
+ index, kMaxTimeBinIndex-1);
+ continue;
+ }
+ fTimeBinIndex[index] = i;
+ }
- for (Int_t i=0; i<nentr; i++) {
- TObjArray *ioArray = new TObjArray(400);
- branch->SetAddress(&ioArray);
- tree->GetEvent(i);
- Int_t npoints = ioArray->GetEntriesFast();
- printf("Read %d rec. points from entry %d \n", npoints, i);
- for(Int_t j=0; j<npoints; j++) {
- AliTRDrecPoint *p=(AliTRDrecPoint*)ioArray->UncheckedAt(j);
- AliTRDcluster *c = new AliTRDcluster(p);
- if( option >= 0) array->AddLast(c);
- else array->AddLast(p);
+ Double_t x1, dx1, x2, dx2, gap;
+
+ for(Int_t i = 0; i < fN-1; i++) {
+ x1 = fLayers[i]->GetX();
+ dx1 = fLayers[i]->GetdX();
+ x2 = fLayers[i+1]->GetX();
+ dx2 = fLayers[i+1]->GetdX();
+ gap = (x2 - dx2/2) - (x1 + dx1/2);
+ if(gap < -0.01) {
+ printf("*** warning: layers %d and %d are overlayed:\n",i,i+1);
+ printf(" %f + %f + %f > %f\n", x1, dx1/2, dx2/2, x2);
+ }
+ if(gap > 0.01) {
+ printf("*** warning: layers %d and %d have a large gap:\n",i,i+1);
+ printf(" (%f - %f) - (%f + %f) = %f\n",
+ x2, dx2/2, x1, dx1, gap);
}
}
+}
+
- file->Close();
- savedir->cd();
+//______________________________________________________
+
+
+Int_t AliTRDtracker::AliTRDtrackingSector::GetLayerNumber(Double_t x) const
+{
+ //
+ // Returns the number of time bin which in radial position is closest to <x>
+ //
+
+ if(x >= fLayers[fN-1]->GetX()) return fN-1;
+ if(x <= fLayers[0]->GetX()) return 0;
+
+ Int_t b=0, e=fN-1, m=(b+e)/2;
+ for (; b<e; m=(b+e)/2) {
+ if (x > fLayers[m]->GetX()) b=m+1;
+ else e=m;
+ }
+ if(TMath::Abs(x - fLayers[m]->GetX()) >
+ TMath::Abs(x - fLayers[m+1]->GetX())) return m+1;
+ else return m;
}
+//______________________________________________________
+
+Int_t AliTRDtracker::AliTRDtrackingSector::GetInnerTimeBin() const
+{
+ //
+ // Returns number of the innermost SENSITIVE propagation layer
+ //
+
+ return GetLayerNumber(0);
+}
+
+//______________________________________________________
+
+Int_t AliTRDtracker::AliTRDtrackingSector::GetOuterTimeBin() const
+{
+ //
+ // Returns number of the outermost SENSITIVE time bin
+ //
+
+ return GetLayerNumber(GetNumberOfTimeBins() - 1);
+}
+
+//______________________________________________________
+
+Int_t AliTRDtracker::AliTRDtrackingSector::GetNumberOfTimeBins() const
+{
+ //
+ // Returns number of SENSITIVE time bins
+ //
+
+ Int_t tb, layer;
+ for(tb = kMaxTimeBinIndex-1; tb >=0; tb--) {
+ layer = GetLayerNumber(tb);
+ if(layer>=0) break;
+ }
+ return tb+1;
+}
+
+//______________________________________________________
+
+void AliTRDtracker::AliTRDtrackingSector::InsertLayer(AliTRDpropagationLayer* pl)
+{
+ //
+ // Insert layer <pl> in fLayers array.
+ // Layers are sorted according to X coordinate.
+
+ if ( fN == ((Int_t) kMaxLayersPerSector)) {
+ printf("AliTRDtrackingSector::InsertLayer(): Too many layers !\n");
+ return;
+ }
+ if (fN==0) {fLayers[fN++] = pl; return;}
+ Int_t i=Find(pl->GetX());
+
+ memmove(fLayers+i+1 ,fLayers+i,(fN-i)*sizeof(AliTRDpropagationLayer*));
+ fLayers[i]=pl; fN++;
+
+}
+
+//______________________________________________________
+
+Int_t AliTRDtracker::AliTRDtrackingSector::Find(Double_t x) const
+{
+ //
+ // Returns index of the propagation layer nearest to X
+ //
+
+ if (x <= fLayers[0]->GetX()) return 0;
+ if (x > fLayers[fN-1]->GetX()) return fN;
+ Int_t b=0, e=fN-1, m=(b+e)/2;
+ for (; b<e; m=(b+e)/2) {
+ if (x > fLayers[m]->GetX()) b=m+1;
+ else e=m;
+ }
+ return m;
+}
+
+//______________________________________________________
+void AliTRDtracker::AliTRDpropagationLayer::SetZ(Double_t* center, Double_t *w, Double_t *wsensitive )
+{
+ //
+ // set centers and the width of sectors
+ for (Int_t icham=0;icham< AliTRDgeometry::kNcham;icham++){
+ fZc[icham] = center[icham];
+ fZmax[icham] = w[icham];
+ fZmaxSensitive[icham] = wsensitive[icham];
+ // printf("chamber\t%d\tzc\t%f\tzmax\t%f\tzsens\t%f\n",icham,fZc[icham],fZmax[icham],fZmaxSensitive[icham]);
+ }
+}
+//______________________________________________________
+
+void AliTRDtracker::AliTRDpropagationLayer::SetHoles(Bool_t *holes)
+{
+ //
+ // set centers and the width of sectors
+ fHole = kFALSE;
+ for (Int_t icham=0;icham< AliTRDgeometry::kNcham;icham++){
+ fIsHole[icham] = holes[icham];
+ if (holes[icham]) fHole = kTRUE;
+ }
+}
+
+
+
+void AliTRDtracker::AliTRDpropagationLayer::GetPropagationParameters(
+ Double_t y, Double_t z, Double_t &dx, Double_t &rho, Double_t &radLength,
+ Bool_t &lookForCluster) const
+{
+ //
+ // Returns radial step <dx>, density <rho>, rad. length <radLength>,
+ // and sensitivity <lookForCluster> in point <y,z>
+ //
+
+ Double_t alpha = AliTRDgeometry::GetAlpha();
+ Double_t ymax = fX*TMath::Tan(0.5*alpha);
+
+
+ dx = fdX;
+ rho = fRho;
+ radLength = fX0;
+ lookForCluster = kFALSE;
+ Bool_t cross =kFALSE;
+ //
+ //
+ if ( (ymax-TMath::Abs(y))<3.){ //cross material
+ rho*=40.;
+ radLength*=40.;
+ cross=kTRUE;
+ }
+ //
+ // check dead regions in sensitive volume
+ //
+ Int_t zone=-1;
+ for(Int_t ch = 0; ch < (Int_t) kZones; ch++) {
+ if (TMath::Abs(z - fZc[ch]) > fZmax[ch]) continue; //not in given zone
+ //
+ if (TMath::Abs(z - fZc[ch]) < fZmaxSensitive[ch]){
+ if (fTimeBinIndex>=0) lookForCluster = !(fIsHole[zone]);
+ if(TMath::Abs(y) > fYmaxSensitive){
+ lookForCluster = kFALSE;
+ }
+ if (fIsHole[zone]) {
+ //if hole
+ rho = 1.29e-3;
+ radLength = 36.66;
+ }
+ }else{
+ rho = 2.7; radLength = 24.01; //aluminium in between
+ }
+ }
+ //
+ if (fTimeBinIndex>=0) return;
+ //
+ //
+ // check hole
+ if (fHole==kFALSE) return;
+ //
+ for(Int_t ch = 0; ch < (Int_t) kZones; ch++) {
+ if (TMath::Abs(z - fZc[ch]) < fZmax[ch]){
+ if (fIsHole[ch]) {
+ //if hole
+ rho = 1.29e-3;
+ radLength = 36.66;
+ }
+ }
+ }
+ return;
+}
+
+Int_t AliTRDtracker::AliTRDpropagationLayer::GetZone( Double_t z) const
+{
+ //
+ //
+ if (fTimeBinIndex < 0) return -20; //unknown
+ Int_t zone=-10; // dead zone
+ for(Int_t ch = 0; ch < (Int_t) kZones; ch++) {
+ if(TMath::Abs(z - fZc[ch]) < fZmax[ch])
+ zone = ch;
+ }
+ return zone;
+}
+
+
+//______________________________________________________
+
+void AliTRDtracker::AliTRDpropagationLayer::InsertCluster(AliTRDcluster* c,
+ UInt_t index) {
+
+// Insert cluster in cluster array.
+// Clusters are sorted according to Y coordinate.
+
+ if(fTimeBinIndex < 0) {
+ printf("*** attempt to insert cluster into non-sensitive time bin!\n");
+ return;
+ }
+
+ if (fN== (Int_t) kMaxClusterPerTimeBin) {
+ printf("AliTRDpropagationLayer::InsertCluster(): Too many clusters !\n");
+ return;
+ }
+ if (fN==0) {fIndex[0]=index; fClusters[fN++]=c; return;}
+ Int_t i=Find(c->GetY());
+ memmove(fClusters+i+1 ,fClusters+i,(fN-i)*sizeof(AliTRDcluster*));
+ memmove(fIndex +i+1 ,fIndex +i,(fN-i)*sizeof(UInt_t));
+ fIndex[i]=index; fClusters[i]=c; fN++;
+}
+
+//______________________________________________________
+
+Int_t AliTRDtracker::AliTRDpropagationLayer::Find(Double_t y) const {
+
+// Returns index of the cluster nearest in Y
+
+ if (y <= fClusters[0]->GetY()) return 0;
+ if (y > fClusters[fN-1]->GetY()) return fN;
+ Int_t b=0, e=fN-1, m=(b+e)/2;
+ for (; b<e; m=(b+e)/2) {
+ if (y > fClusters[m]->GetY()) b=m+1;
+ else e=m;
+ }
+ return m;
+}
+
+//---------------------------------------------------------
+
+Double_t AliTRDtracker::GetTiltFactor(const AliTRDcluster* c) {
+//
+// Returns correction factor for tilted pads geometry
+//
+
+ AliTRDpadPlane *padPlane = fPar->GetPadPlane(0,0);
+ Double_t h01 = sin(TMath::Pi() / 180.0 * padPlane->GetTiltingAngle());
+ Int_t det = c->GetDetector();
+ Int_t plane = fGeom->GetPlane(det);
+
+ //if((plane == 1) || (plane == 3) || (plane == 5)) h01=-h01;
+ if((plane == 0) || (plane == 2) || (plane == 4)) h01=-h01;
+
+ if(fNoTilt) h01 = 0;
+
+ return h01;
+}
+
+
+void AliTRDtracker::CookdEdxTimBin(AliTRDtrack& TRDtrack)
+{
+ // *** ADDED TO GET MORE INFORMATION FOR TRD PID ---- PS
+ // This is setting fdEdxPlane and fTimBinPlane
+ // Sums up the charge in each plane for track TRDtrack and also get the
+ // Time bin for Max. Cluster
+ // Prashant Shukla (shukla@physi.uni-heidelberg.de)
+
+ // const Int_t kNPlane = AliTRDgeometry::Nplan();
+ // const Int_t kNPlane = 6;
+ Double_t clscharge[kNPlane], maxclscharge[kNPlane];
+ Int_t nCluster[kNPlane], timebin[kNPlane];
+
+ //Initialization of cluster charge per plane.
+ for (Int_t iPlane = 0; iPlane < kNPlane; iPlane++) {
+ clscharge[iPlane] = 0.0;
+ nCluster[iPlane] = 0;
+ timebin[iPlane] = -1;
+ maxclscharge[iPlane] = 0.0;
+ }
+
+ // Loop through all clusters associated to track TRDtrack
+ Int_t nClus = TRDtrack.GetNumberOfClusters(); // from Kalmantrack
+ for (Int_t iClus = 0; iClus < nClus; iClus++) {
+ Double_t charge = TRDtrack.GetClusterdQdl(iClus);
+ Int_t index = TRDtrack.GetClusterIndex(iClus);
+ AliTRDcluster *TRDcluster = (AliTRDcluster *) GetCluster(index);
+ if (!TRDcluster) continue;
+ Int_t tb = TRDcluster->GetLocalTimeBin();
+ if (!tb) continue;
+ Int_t detector = TRDcluster->GetDetector();
+ Int_t iPlane = fGeom->GetPlane(detector);
+ clscharge[iPlane] = clscharge[iPlane]+charge;
+ if(charge > maxclscharge[iPlane]) {
+ maxclscharge[iPlane] = charge;
+ timebin[iPlane] = tb;
+ }
+ nCluster[iPlane]++;
+ } // end of loop over cluster
+
+ // Setting the fdEdxPlane and fTimBinPlane variabales
+ Double_t Total_ch = 0;
+ for (Int_t iPlane = 0; iPlane < kNPlane; iPlane++) {
+ // Quality control of TRD track.
+ if (nCluster[iPlane]<= 5) {
+ clscharge[iPlane]=0.0;
+ timebin[iPlane]=-1;
+ }
+ if (nCluster[iPlane]) clscharge[iPlane] /= nCluster[iPlane];
+ TRDtrack.SetPIDsignals(clscharge[iPlane], iPlane);
+ TRDtrack.SetPIDTimBin(timebin[iPlane], iPlane);
+ Total_ch= Total_ch+clscharge[iPlane];
+ }
+ // Int_t i;
+ // Int_t nc=TRDtrack.GetNumberOfClusters();
+ // Float_t dedx=0;
+ // for (i=0; i<nc; i++) dedx += TRDtrack.GetClusterdQdl(i);
+ // dedx /= nc;
+ // for (Int_t iPlane = 0; iPlane < kNPlane; iPlane++) {
+ // TRDtrack.SetPIDsignals(dedx, iPlane);
+ // TRDtrack.SetPIDTimBin(timbin[iPlane], iPlane);
+ // }
+
+} // end of function
+
+
+Int_t AliTRDtracker::FindClusters(Int_t sector, Int_t t0, Int_t t1, AliTRDtrack * track, Int_t *clusters)
+{
+ //
+ //
+ // try to find nearest clusters to the track in timebins from t0 to t1
+ //
+ //
+ Double_t x[1000],yt[1000],zt[10000];
+ Double_t dz[1000],dy[10000];
+ Int_t indexes[2][10000];
+ AliTRDcluster *cl[2][10000];
+
+ for (Int_t it=t0;it<t1; it++){
+ clusters[it]=-2;
+ indexes[0][it]=-2; //reset indexes1
+ indexes[1][it]=-2; //reset indexes1
+ x[it]=0;
+ yt[it]=0;
+ zt[it]=0;
+ dz[it]=0;
+ dy[it]=0;
+ cl[0][it]=0;
+ cl[1][it]=0;
+ }
+ //
+ Double_t x0 = track->GetX();
+ Double_t sy2=ExpectedSigmaY2(x0,track->GetTgl(),track->GetPt());
+ Double_t sz2=ExpectedSigmaZ2(x0,track->GetTgl());
+ Double_t road = 10.*sqrt(track->GetSigmaY2() + sy2);
+ Int_t nall=0;
+ Int_t nfound=0;
+
+ for (Int_t it=t0;it<t1;it++){
+ Double_t maxChi2=fgkMaxChi2;
+ AliTRDpropagationLayer& timeBin=*(fTrSec[sector]->GetLayer(it));
+ if (timeBin==0) continue; // no indexes1
+ Int_t maxn = timeBin;
+ x[it] = timeBin.GetX();
+ Double_t y,z;
+ if (!track->GetProlongation(x[it],y,z)) continue;
+ yt[it]=y;
+ zt[it]=z;
+ Double_t chi2 =1000000;
+ nall++;
+ //
+ // find nearest cluster at given pad
+ for (Int_t i=timeBin.Find(y-road); i<maxn; i++) {
+ AliTRDcluster* c=(AliTRDcluster*)(timeBin[i]);
+ Double_t h01 = GetTiltFactor(c);
+ if (c->GetY() > y+road) break;
+ if (c->IsUsed() > 0) continue;
+ if((c->GetZ()-z)*(c->GetZ()-z) > 3 * sz2) continue;
+ chi2=track->GetPredictedChi2(c,h01);
+ if (chi2 > maxChi2) continue;
+ maxChi2=chi2;
+ cl[0][it]=c;
+ indexes[0][it] =timeBin.GetIndex(i);
+ }
+ //
+ // find nearest cluster also in adjacent 2 pads
+ //
+ for (Int_t i=timeBin.Find(y-road); i<maxn; i++) {
+ AliTRDcluster* c=(AliTRDcluster*)(timeBin[i]);
+ Double_t h01 = GetTiltFactor(c);
+ if (c->GetY() > y+road) break;
+ if (c->IsUsed() > 0) continue;
+ if((c->GetZ()-z)*(c->GetZ()-z) > 12 * sz2) continue;
+ chi2=track->GetPredictedChi2(c,h01);
+ if (chi2 > maxChi2) continue;
+ maxChi2=chi2;
+ cl[1][it]=c;
+ indexes[1][it]=timeBin.GetIndex(i);
+ if (!cl[0][it]) {
+ cl[0][it]=c;
+ indexes[0][it]=timeBin.GetIndex(i);
+ }
+ }
+ if (cl[0][it]||cl[1][it]) nfound++;
+ }
+ //
+ if (nfound<5) return 0;
+ //
+ // choose one of the variants
+ //
+ Int_t changes[2]={0,0};
+ Float_t sigmay[2]={1000,1000};
+ Float_t meany[2] ={1000,1000};
+ Float_t meanz[2] ={1000,1000};
+ Int_t sumall[2] ={0,0};
+ Int_t ngood[2] ={0,0};
+ Int_t nbad[2] ={0,0};
+ //
+ //
+ for (Int_t ih=0; ih<2;ih++){
+ Float_t lastz =-10000;
+ Float_t sumz =0;
+ Float_t sum =0;
+ Double_t sumdy = 0;
+ Double_t sumdy2= 0;
+ //
+ // how many changes ++ mean z ++mean y ++ sigma y
+ for (Int_t it=t0;it<t1;it++){
+ if (!cl[ih][it]) continue;
+ sumall[ih]++;
+ if (lastz<-9999) lastz = cl[ih][it]->GetZ();
+ if (TMath::Abs(lastz-cl[ih][it]->GetZ())>1) {
+ lastz = cl[ih][it]->GetZ();
+ changes[ih]++;
+ }
+ sumz = cl[ih][it]->GetZ();
+ sum++;
+ Double_t h01 = GetTiltFactor(cl[ih][it]);
+ dz[it] = cl[ih][it]->GetZ()- zt[it];
+ dy[it] = cl[ih][it]->GetY()+ dz[it]*h01 -yt[it];
+ sum++;
+ sumdy += dy[it];
+ sumdy2+= dy[it]*dy[it];
+ Int_t label = TMath::Abs(track->GetLabel());
+ if (cl[ih][it]->GetLabel(0)==label || cl[ih][it]->GetLabel(1)==label||cl[ih][it]->GetLabel(2)==label){
+ ngood[ih]++;
+ }
+ else{
+ nbad[ih]++;
+ }
+ }
+ if (sumall[ih]>4){
+ meanz[ih] = sumz/sum;
+ meany[ih] = sumdy/sum;
+ sigmay[ih] = TMath::Sqrt(sumdy2/sum-meany[ih]*meany[ih]);
+ }
+ }
+ Int_t best =0;
+ /*
+ if (sumall[0]<sumall[1]-2&&sigmay[1]<0.1){
+ if (sigmay[1]<sigmay[0]) best = 1; // if sigma is better
+ }
+ */
+ Float_t quality0 = (sigmay[0]+TMath::Abs(meany[0]))*(1.+Float_t(changes[0])/Float_t(sumall[0]));
+ Float_t quality1 = (sigmay[1]+TMath::Abs(meany[1]))*(1.+Float_t(changes[1])/Float_t(sumall[1]));
+
+ if (quality0>quality1){
+ best = 1;
+ }
+
+
+ //
+ for (Int_t it=t0;it<t1;it++){
+ if (!cl[best][it]) continue;
+ Double_t h01 = GetTiltFactor(cl[best][it]);
+ dz[it] = cl[best][it]->GetZ()- zt[it];
+ dy[it] = cl[best][it]->GetY()+ dz[it]*h01 -yt[it];
+ //
+ if (TMath::Abs(dy[it])<2.5*sigmay[best])
+ clusters[it] = indexes[best][it];
+ }
+
+ if (nbad[0]>4){
+ nbad[0] = nfound;
+ }
+ return nfound;
+}
+
+
git://git.uio.no / u / mrichter / AliRoot.git / blobdiff