*/
-////////////////////////////////////////////////////////////////////////////////
-// //
-// The TRD tracker //
-// //
-////////////////////////////////////////////////////////////////////////////////
-
#include <iostream.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 "AliTRDgeometryDetail.h"
#include "AliTRDcluster.h"
#include "AliTRDtrack.h"
-#include "AliTRDtrackingSector.h"
-#include "AliTRDtimeBin.h"
+#include "../TPC/AliTPCtrack.h"
#include "AliTRDtracker.h"
ClassImp(AliTRDtracker)
- const Float_t AliTRDtracker::fgkSeedDepth = 0.5;
- const Float_t AliTRDtracker::fgkSeedStep = 0.05;
- const Float_t AliTRDtracker::fgkSeedGap = 0.25;
+ const Float_t AliTRDtracker::fSeedDepth = 0.5;
+ const Float_t AliTRDtracker::fSeedStep = 0.10;
+ const Float_t AliTRDtracker::fSeedGap = 0.25;
+
+ const Float_t AliTRDtracker::fMaxSeedDeltaZ12 = 40.;
+ const Float_t AliTRDtracker::fMaxSeedDeltaZ = 25.;
+ const Float_t AliTRDtracker::fMaxSeedC = 0.0052;
+ const Float_t AliTRDtracker::fMaxSeedTan = 1.2;
+ const Float_t AliTRDtracker::fMaxSeedVertexZ = 150.;
- 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::fSeedErrorSY = 0.2;
+ const Double_t AliTRDtracker::fSeedErrorSY3 = 2.5;
+ const Double_t AliTRDtracker::fSeedErrorSZ = 0.1;
- 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::fMinClustersInSeed = 0.7;
- const Float_t AliTRDtracker::fgkMinClustersInSeed = 0.7;
+ const Float_t AliTRDtracker::fMinClustersInTrack = 0.5;
+ const Float_t AliTRDtracker::fMinFractionOfFoundClusters = 0.8;
- const Float_t AliTRDtracker::fgkMinClustersInTrack = 0.5;
- const Float_t AliTRDtracker::fgkSkipDepth = 0.05;
- const Float_t AliTRDtracker::fgkLabelFraction = 0.5;
- const Float_t AliTRDtracker::fgkWideRoad = 20.;
+ const Float_t AliTRDtracker::fSkipDepth = 0.05;
+ const Float_t AliTRDtracker::fLabelFraction = 0.8;
+ const Float_t AliTRDtracker::fWideRoad = 20.;
+
+ const Double_t AliTRDtracker::fMaxChi2 = 24.;
- const Double_t AliTRDtracker::fgkMaxChi2 = 24.;
//____________________________________________________________________
-AliTRDtracker::AliTRDtracker()
+AliTRDtracker::AliTRDtracker(const TFile *geomfile)
{
- //
- // Default constructor
- //
+ //
+ // Main constructor
+ //
- fEvent = 0;
- fGeom = NULL;
+ Float_t fTzero = 0;
+ Int_t version = 2;
+
+ fAddTRDseeds = kFALSE;
- fNclusters = 0;
- fClusters = NULL;
- fNseeds = 0;
- fSeeds = NULL;
- fNtracks = 0;
- fTracks = NULL;
+ fGeom = NULL;
+
+ 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();
+ }
- fSY2corr = 0.025;
-}
+ if(fGeom) {
+ // fTzero = geo->GetT0();
+ fTzero = 0.;
+ version = fGeom->IsVersion();
+ printf("Found geometry version %d on file \n", version);
+ }
+ else {
+ printf("AliTRDtracker::AliTRDtracker(): cann't find TRD geometry!\n");
+ printf(" DETAIL TRD geometry and DEFAULT TRD parameter will be used\n");
+ fGeom = new AliTRDgeometryDetail();
+ fPar = new AliTRDparameter();
+ }
+
+ savedir->cd();
-//____________________________________________________________________
-AliTRDtracker::AliTRDtracker(const Text_t* name, const Text_t* title)
- :TNamed(name, title)
-{
- //
- // TRD tracker contructor
- //
+
+ // fGeom->SetT0(fTzero);
fEvent = 0;
- fGeom = NULL;
fNclusters = 0;
fClusters = new TObjArray(2000);
fNseeds = 0;
- fSeeds = new TObjArray(20000);
+ fSeeds = new TObjArray(2000);
fNtracks = 0;
- fTracks = new TObjArray(10000);
-
- fSY2corr = 0.025;
-}
-
-//___________________________________________________________________
-AliTRDtracker::~AliTRDtracker()
-{
- //
- // Destructor
- //
-
- delete fClusters;
- delete fTracks;
- delete fSeeds;
- delete fGeom;
-
-}
-
-//___________________________________________________________________
-void AliTRDtracker::Clusters2Tracks(TH1F *hs, TH1F *hd)
-{
- //
- // Do the trackfinding
- //
-
- Int_t i;
-
- Int_t inner, outer;
- Int_t fTotalNofTimeBins = fGeom->GetTimeMax() * AliTRDgeometry::Nplan();
- Int_t nSteps = (Int_t) (fgkSeedDepth / fgkSeedStep);
- Int_t gap = (Int_t) (fTotalNofTimeBins * fgkSeedGap);
- Int_t step = (Int_t) (fTotalNofTimeBins * fgkSeedStep);
-
+ fTracks = new TObjArray(1000);
- // nSteps = 1;
-
- if (!fClusters) return;
-
- AliTRDtrackingSector fTrSec[AliTRDgeometry::kNsect];
- SetUpSectors(fTrSec);
+ for(Int_t geom_s = 0; geom_s < kTRACKING_SECTORS; geom_s++) {
+ Int_t tr_s = CookSectorIndex(geom_s);
+ fTrSec[tr_s] = new AliTRDtrackingSector(fGeom, geom_s, fPar);
+ }
- // make a first turn looking for seed ends in the same (n,n)
- // and in the adjacent sectors (n,n+1)
+ fSY2corr = 0.025;
+ fSZ2corr = 12.;
- for(i=0; i<nSteps; i++) {
- printf("step %d out of %d \n", i+1, nSteps);
- outer=fTotalNofTimeBins-1-i*step; inner=outer-gap;
- MakeSeeds(inner,outer, fTrSec, 1, hs, hd);
- FindTracks(fTrSec, hs, hd);
- }
+ // calculate max gap on track
- // make a second turn looking for seed ends in next-to-adjacent
- // sectors (n,n+2)
+ Double_t dxAmp = (Double_t) fGeom->CamHght(); // Amplification region
+ Double_t dxDrift = (Double_t) fGeom->CdrHght(); // Drift region
- for(i=0; i<nSteps; i++) {
- printf("step %d out of %d \n", i+1, nSteps);
- outer=fTotalNofTimeBins-1-i*step; inner=outer-gap;
- MakeSeeds(inner, outer, fTrSec, 2, hs, hd);
- FindTracks(fTrSec,hs,hd);
- }
+ Double_t dx = (Double_t) fPar->GetTimeBinSize();
+ Int_t tbAmp = fPar->GetTimeBefore();
+ Int_t maxAmp = (Int_t) ((dxAmp+0.000001)/dx);
+ Int_t tbDrift = fPar->GetTimeMax();
+ Int_t maxDrift = (Int_t) ((dxDrift+0.000001)/dx);
-}
+ tbDrift = TMath::Min(tbDrift,maxDrift);
+ tbAmp = TMath::Min(tbAmp,maxAmp);
-//_____________________________________________________________________
-Double_t AliTRDtracker::ExpectedSigmaY2(Double_t r, Double_t tgl, Double_t pt) const
-{
- //
- // Parametrised "expected" error of the cluster reconstruction in Y
- //
+ fTimeBinsPerPlane = tbAmp + tbDrift;
+ fMaxGap = (Int_t) (fTimeBinsPerPlane * fGeom->Nplan() * fSkipDepth);
- Double_t s = 0.08 * 0.08;
- return s;
+ fVocal = kFALSE;
-}
+}
-//_____________________________________________________________________
-Double_t AliTRDtracker::ExpectedSigmaZ2(Double_t r, Double_t tgl) const
+//___________________________________________________________________
+AliTRDtracker::~AliTRDtracker()
{
- //
- // Parametrised "expected" error of the cluster reconstruction in Z
- //
-
- Double_t s = 6 * 6 /12.;
- return s;
+ delete fClusters;
+ delete fTracks;
+ delete fSeeds;
+ delete fGeom;
+ delete fPar;
-}
+ for(Int_t geom_s = 0; geom_s < kTRACKING_SECTORS; geom_s++) {
+ delete fTrSec[geom_s];
+ }
+}
//_____________________________________________________________________
-Double_t f1trd(Double_t x1,Double_t y1,
- Double_t x2,Double_t y2,
- Double_t x3,Double_t y3)
+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 xr=TMath::Abs(d/(d*x1-a)), yr=d/(d*y1-b);
return -xr*yr/sqrt(xr*xr+yr*yr);
-
}
//_____________________________________________________________________
-Double_t f2trd(Double_t x1,Double_t y1,
- Double_t x2,Double_t y2,
- Double_t x3,Double_t y3)
+inline Double_t f2trd(Double_t x1,Double_t y1,
+ 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 xr=TMath::Abs(d/(d*x1-a)), yr=d/(d*y1-b);
return -a/(d*y1-b)*xr/sqrt(xr*xr+yr*yr);
-
}
//_____________________________________________________________________
-Double_t f3trd(Double_t x1,Double_t y1,
- Double_t x2,Double_t y2,
- Double_t z1,Double_t z2)
+inline Double_t f3trd(Double_t x1,Double_t y1,
+ 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));
-
}
-
//___________________________________________________________________
-
-Int_t AliTRDtracker::FindProlongation(AliTRDtrack& t, AliTRDtrackingSector *sec,
- Int_t s, Int_t rf, Int_t matchedIndex,
- TH1F *hs, TH1F *hd)
+Int_t AliTRDtracker::Clusters2Tracks(const TFile *inp, TFile *out)
{
//
- // 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.
+ // Finds tracks within the TRD. File <inp> is expected to contain seeds
+ // at the outer part of the TRD. If <inp> is NULL, the seeds
+ // are found within the TRD if fAddTRDseeds is TRUE.
+ // The tracks are propagated to the innermost time bin
+ // of the TRD and stored in file <out>.
//
- // TH1F *hsame = hs;
- // TH1F *hdiff = hd;
+ LoadEvent();
+
+ TDirectory *savedir=gDirectory;
- // Bool_t good_match;
+ char tname[100];
- const Int_t kTimeBinsToSkip=Int_t(fgkSkipDepth*sec->GetNtimeBins());
- Int_t tryAgain=kTimeBinsToSkip;
+ if (!out->IsOpen()) {
+ cerr<<"AliTRDtracker::Clusters2Tracks(): output file is not open !\n";
+ return 1;
+ }
- Double_t alpha=AliTRDgeometry::GetAlpha();
+ sprintf(tname,"seedTRDtoTPC_%d",fEvent);
+ TTree tpc_tree(tname,"Tree with seeds from TRD at outer TPC pad row");
+ AliTPCtrack *iotrack=0;
+ tpc_tree.Branch("tracks","AliTPCtrack",&iotrack,32000,0);
+
+ sprintf(tname,"TreeT%d_TRD",fEvent);
+ TTree trd_tree(tname,"TRD tracks at inner TRD time bin");
+ AliTRDtrack *iotrack_trd=0;
+ trd_tree.Branch("tracks","AliTRDtrack",&iotrack_trd,32000,0);
+
+ Int_t timeBins = fTrSec[0]->GetNumberOfTimeBins();
+ Float_t foundMin = fMinClustersInTrack * timeBins;
+
+ if (inp) {
+ TFile *in=(TFile*)inp;
+ if (!in->IsOpen()) {
+ cerr<<"AliTRDtracker::Clusters2Tracks(): file with seeds is not open !\n";
+ cerr<<" ... going for seeds finding inside the TRD\n";
+ }
+ else {
+ in->cd();
+ sprintf(tname,"TRDb_%d",fEvent);
+ TTree *seedTree=(TTree*)in->Get(tname);
+ if (!seedTree) {
+ cerr<<"AliTRDtracker::Clusters2Tracks(): ";
+ cerr<<"can't get a tree with track seeds !\n";
+ return 3;
+ }
+ AliTRDtrack *seed=new AliTRDtrack;
+ seedTree->SetBranchAddress("tracks",&seed);
+
+ Int_t n=(Int_t)seedTree->GetEntries();
+ for (Int_t i=0; i<n; i++) {
+ seedTree->GetEvent(i);
+ seed->ResetCovariance();
+ fSeeds->AddLast(new AliTRDtrack(*seed));
+ fNseeds++;
+ }
+ delete seed;
+ }
+ }
- Int_t ns=Int_t(2*TMath::Pi()/alpha+0.5);
+ out->cd();
- Double_t x0, rho;
+ // find tracks from loaded seeds
- for (Int_t nr=sec->GetTimeBinNumber(t.GetX())-1; nr>=rf; nr--) {
+ Int_t nseed=fSeeds->GetEntriesFast();
+ Int_t i, found = 0;
+ Int_t innerTB = fTrSec[0]->GetInnerTimeBin();
+
+ for (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-fLabelFraction);
+ // t.CookdEdx();
+ }
+ iotrack_trd = pt;
+ trd_tree.Fill();
+ cerr<<found++<<'\r';
+
+ if(PropagateToTPC(t)) {
+ AliTPCtrack *tpc = new AliTPCtrack(*pt,pt->GetAlpha());
+ iotrack = tpc;
+ tpc_tree.Fill();
+ delete tpc;
+ }
+ delete fSeeds->RemoveAt(i);
+ fNseeds--;
+ }
- Double_t x=sec->GetX(nr);
- Double_t ymax=x*TMath::Tan(0.5*alpha);
+ cout<<"Number of loaded seeds: "<<nseed<<endl;
+ cout<<"Number of found tracks from loaded seeds: "<<found<<endl;
- rho = 0.00295; x0 = 11.09; // TEC
- if(sec->TECframe(nr,t.GetY(),t.GetZ())) {
- rho = 1.7; x0 = 33.0; // G10 frame
- }
- if(TMath::Abs(x - t.GetX()) > 3) {
- rho = 0.0559; x0 = 55.6; // radiator
- }
- if (!t.PropagateTo(x,x0,rho,0.139)) {
- cerr<<"Can't propagate to x = "<<x<<endl;
- return 0;
- }
+ // after tracks from loaded seeds are found and the corresponding
+ // clusters are used, look for additional seeds from TRD
- AliTRDtimeBin& timeBin=sec[s][nr];
- Double_t sy2=ExpectedSigmaY2(t.GetX(),t.GetTgl(),t.GetPt());
- Double_t sz2=ExpectedSigmaZ2(t.GetX(),t.GetTgl());
- Double_t road=25.*sqrt(t.GetSigmaY2() + sy2), y=t.GetY(), z=t.GetZ();
+ if(fAddTRDseeds) {
+ // Find tracks for the seeds in the TRD
+ Int_t timeBins = fTrSec[0]->GetNumberOfTimeBins();
+
+ Int_t nSteps = (Int_t) (fSeedDepth / fSeedStep);
+ Int_t gap = (Int_t) (timeBins * fSeedGap);
+ Int_t step = (Int_t) (timeBins * fSeedStep);
+
+ // make a first turn with tight cut on initial curvature
+ for(Int_t turn = 1; turn <= 2; turn++) {
+ if(turn == 2) {
+ nSteps = (Int_t) (fSeedDepth / (3*fSeedStep));
+ step = (Int_t) (timeBins * (3*fSeedStep));
+ }
+ for(Int_t i=0; i<nSteps; i++) {
+ Int_t outer=timeBins-1-i*step;
+ Int_t inner=outer-gap;
- if (road>fgkWideRoad) {
- if (t.GetNclusters() > 4) {
- cerr<<t.GetNclusters()<<" FindProlongation: Road is too wide !\n";
+ nseed=fSeeds->GetEntriesFast();
+ printf("\n initial number of seeds %d\n", nseed);
+
+ MakeSeeds(inner, outer, turn);
+
+ nseed=fSeeds->GetEntriesFast();
+ printf("\n number of seeds after MakeSeeds %d\n", 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-fLabelFraction);
+ t.CookdEdx();
+ cerr<<found++<<'\r';
+ iotrack_trd = pt;
+ trd_tree.Fill();
+ if(PropagateToTPC(t)) {
+ AliTPCtrack *tpc = new AliTPCtrack(*pt,pt->GetAlpha());
+ iotrack = tpc;
+ tpc_tree.Fill();
+ delete tpc;
+ }
+ }
+ delete fSeeds->RemoveAt(i);
+ fNseeds--;
+ }
}
- return 0;
- }
+ }
+ }
+ tpc_tree.Write();
+ trd_tree.Write();
+
+ cout<<"Total number of found tracks: "<<found<<endl;
+
+ UnloadEvent();
+
+ savedir->cd();
+
+ return 0;
+}
+
+
+
+//_____________________________________________________________________________
+Int_t AliTRDtracker::PropagateBack(const TFile *inp, TFile *out) {
+ //
+ // Reads seeds from file <inp>. 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.
+ //
+
+
+ LoadEvent();
+
+ TDirectory *savedir=gDirectory;
+
+ TFile *in=(TFile*)inp;
+
+ if (!in->IsOpen()) {
+ cerr<<"AliTRDtracker::PropagateBack(): ";
+ cerr<<"file with back propagated TPC tracks is not open !\n";
+ return 1;
+ }
+
+ if (!out->IsOpen()) {
+ cerr<<"AliTRDtracker::PropagateBack(): ";
+ cerr<<"file for back propagated TRD tracks is not open !\n";
+ return 2;
+ }
+
+ in->cd();
+ char tname[100];
+ sprintf(tname,"seedsTPCtoTRD_%d",fEvent);
+ TTree *seedTree=(TTree*)in->Get(tname);
+ if (!seedTree) {
+ cerr<<"AliTRDtracker::PropagateBack(): ";
+ cerr<<"can't get a tree with seeds from TPC !\n";
+ cerr<<"check if your version of TPC tracker creates tree "<<tname<<"\n";
+ return 3;
+ }
- AliTRDcluster *cl=0;
- UInt_t index=0;
- // Int_t ncl = 0;
+ AliTPCtrack *seed=new AliTPCtrack;
+ seedTree->SetBranchAddress("tracks",&seed);
+
+ Int_t n=(Int_t)seedTree->GetEntries();
+ for (Int_t i=0; i<n; i++) {
+ seedTree->GetEvent(i);
+ Int_t lbl = seed->GetLabel();
+ AliTRDtrack *tr = new AliTRDtrack(*seed,seed->GetAlpha());
+ tr->SetSeedLabel(lbl);
+ fSeeds->AddLast(tr);
+ fNseeds++;
+ }
- Double_t maxChi2=fgkMaxChi2;
+ delete seed;
+ delete seedTree;
- if (timeBin) {
+ out->cd();
- for (Int_t i=timeBin.Find(y-road); i<timeBin; i++) {
- AliTRDcluster* c=(AliTRDcluster*)(timeBin[i]);
+ AliTPCtrack *otrack=0;
- // good_match = kFALSE;
- // if((c->GetTrackIndex(0) == matchedIndex) ||
- // (c->GetTrackIndex(1) == matchedIndex) ||
- // (c->GetTrackIndex(2) == matchedIndex)) good_match = kTRUE;
- // if(hsame) hsame->Fill(TMath::Abs(c->GetY()-y)/road);
- // if(hdiff) hdiff->Fill(road);
+ sprintf(tname,"seedsTRDtoTOF1_%d",fEvent);
+ TTree tofTree1(tname,"Tracks back propagated through TPC and TRD");
+ tofTree1.Branch("tracks","AliTPCtrack",&otrack,32000,0);
- if (c->GetY() > y+road) break;
- if (c->IsUsed() > 0) continue;
+ sprintf(tname,"seedsTRDtoTOF2_%d",fEvent);
+ TTree tofTree2(tname,"Tracks back propagated through TPC and TRD");
+ tofTree2.Branch("tracks","AliTPCtrack",&otrack,32000,0);
- // if(good_match) hsame->Fill(TMath::Abs(c->GetZ()-z));
- // else hdiff->Fill(TMath::Abs(c->GetZ()-z));
+ sprintf(tname,"seedsTRDtoPHOS_%d",fEvent);
+ TTree phosTree(tname,"Tracks back propagated through TPC and TRD");
+ phosTree.Branch("tracks","AliTPCtrack",&otrack,32000,0);
- // if(!good_match) continue;
+ sprintf(tname,"seedsTRDtoRICH_%d",fEvent);
+ TTree richTree(tname,"Tracks back propagated through TPC and TRD");
+ richTree.Branch("tracks","AliTPCtrack",&otrack,32000,0);
- if((c->GetZ()-z)*(c->GetZ()-z) > 3 * 12 * sz2) continue;
+ sprintf(tname,"TRDb_%d",fEvent);
+ TTree trdTree(tname,"Back propagated TRD tracks at outer TRD time bin");
+ AliTRDtrack *otrack_trd=0;
+ trdTree.Branch("tracks","AliTRDtrack",&otrack_trd,32000,0);
+
+ Int_t found=0;
- Double_t chi2=t.GetPredictedChi2(c);
+ Int_t nseed=fSeeds->GetEntriesFast();
- // if((c->GetTrackIndex(0) == matchedIndex) ||
- // (c->GetTrackIndex(1) == matchedIndex) ||
- // (c->GetTrackIndex(2) == matchedIndex))
- // hdiff->Fill(chi2);
+ Float_t foundMin = fMinClustersInTrack * fTimeBinsPerPlane * fGeom->Nplan();
- // ncl++;
+ Int_t outermost_tb = fTrSec[0]->GetOuterTimeBin();
- if (chi2 > maxChi2) continue;
- maxChi2=chi2;
- cl=c;
- index=timeBin.GetIndex(i);
- }
-
- if(!cl) {
+ for (Int_t i=0; i<nseed; i++) {
- for (Int_t i=timeBin.Find(y-road); i<timeBin; i++) {
- AliTRDcluster* c=(AliTRDcluster*)(timeBin[i]);
+ AliTRDtrack *ps=(AliTRDtrack*)fSeeds->UncheckedAt(i), &s=*ps;
+ Int_t expectedClr = FollowBackProlongation(s);
+ Int_t foundClr = s.GetNumberOfClusters();
+ Int_t last_tb = fTrSec[0]->GetLayerNumber(s.GetX());
- if (c->GetY() > y+road) break;
- if (c->IsUsed() > 0) continue;
- if((c->GetZ()-z)*(c->GetZ()-z) > 3.25 * 12 * sz2) continue;
-
- Double_t chi2=t.GetPredictedChi2(c);
-
- // ncl++;
+ printf("seed %d: found %d out of %d expected clusters, Min is %f\n",
+ i, foundClr, expectedClr, foundMin);
- if (chi2 > maxChi2) continue;
- maxChi2=chi2;
- cl=c;
- index=timeBin.GetIndex(i);
- }
- }
-
+ if (foundClr >= foundMin) {
+ s.CookdEdx();
+ CookLabel(ps, 1-fLabelFraction);
+ UseClusters(ps);
+ otrack_trd=ps;
+ trdTree.Fill();
+ cout<<found++<<'\r';
}
- if (cl) {
-
- t.Update(cl,maxChi2,index);
-
- tryAgain=kTimeBinsToSkip;
- } else {
- if (tryAgain==0) break;
- 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;
- }
- } 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(!sec->TECframe(nr,y,z)) tryAgain--;
+ if(((expectedClr < 10) && (last_tb == outermost_tb)) ||
+ ((expectedClr >= 10) &&
+ (((Float_t) foundClr) / ((Float_t) expectedClr) >=
+ fMinFractionOfFoundClusters) && (last_tb == outermost_tb))) {
+
+ Double_t x_tof = 375.5;
+
+ if(PropagateToOuterPlane(s,x_tof)) {
+ AliTPCtrack *pt = new AliTPCtrack(*ps,ps->GetAlpha());
+ otrack = pt;
+ tofTree1.Fill();
+ delete pt;
+
+ x_tof = 381.5;
+
+ if(PropagateToOuterPlane(s,x_tof)) {
+ AliTPCtrack *pt = new AliTPCtrack(*ps,ps->GetAlpha());
+ otrack = pt;
+ tofTree2.Fill();
+ delete pt;
+
+ Double_t x_phos = 460.;
+
+ if(PropagateToOuterPlane(s,x_phos)) {
+ AliTPCtrack *pt = new AliTPCtrack(*ps,ps->GetAlpha());
+ otrack = pt;
+ phosTree.Fill();
+ delete pt;
+
+ Double_t x_rich = 490+1.267;
+
+ if(PropagateToOuterPlane(s,x_rich)) {
+ AliTPCtrack *pt = new AliTPCtrack(*ps,ps->GetAlpha());
+ otrack = pt;
+ richTree.Fill();
+ delete pt;
+ }
+ }
+ }
+ }
}
}
+
+ tofTree1.Write();
+ tofTree2.Write();
+ phosTree.Write();
+ richTree.Write();
+ trdTree.Write();
- return 1;
-}
+ savedir->cd();
+ cerr<<"Number of seeds: "<<nseed<<endl;
+ cerr<<"Number of back propagated TRD tracks: "<<found<<endl;
+ UnloadEvent();
+ return 0;
-//_____________________________________________________________________________
-void AliTRDtracker::GetEvent(const Char_t *hitfile, const Char_t *clusterfile)
-{
- //
- // Opens a ROOT-file with TRD-clusters and reads the cluster-tree in
- //
+}
- ReadClusters(fClusters, clusterfile);
- // get geometry from the file with hits
+//---------------------------------------------------------------------------
+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
- TFile *fInputFile = (TFile*) gROOT->GetListOfFiles()->FindObject(hitfile);
- if (!fInputFile) {
- printf("AliTRDtracker::Open -- ");
- printf("Open the ALIROOT-file %s.\n",hitfile);
- fInputFile = new TFile(hitfile,"UPDATE");
- }
- else {
- printf("AliTRDtracker::Open -- ");
- printf("%s is already open.\n",hitfile);
- }
+ 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;
- // Get AliRun object from file or create it if not on file
+ Int_t trackIndex = t.GetLabel();
- gAlice = (AliRun*) fInputFile->Get("gAlice");
- if (gAlice) {
- printf("AliTRDtracker::GetEvent -- ");
- printf("AliRun object found on file.\n");
- }
- else {
- printf("AliTRDtracker::GetEvent -- ");
- printf("Could not find AliRun object.\n");
- }
+ Int_t ns=Int_t(2*TMath::Pi()/AliTRDgeometry::GetAlpha()+0.5);
- /*
- // Import the Trees for the event nEvent in the file
- Int_t nparticles = gAlice->GetEvent(fEvent);
- cerr<<"nparticles = "<<nparticles<<endl;
+ Int_t try_again=fMaxGap;
- if (nparticles <= 0) {
- printf("AliTRDtracker::GetEvent -- ");
- printf("No entries in the trees for event %d.\n",fEvent);
- }
- */
+ Double_t alpha=t.GetAlpha();
- AliTRD *trd = (AliTRD*) gAlice->GetDetector("TRD");
- fGeom = trd->GetGeometry();
+ 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;
+ Double_t x0, rho, x, dx, y, ymax, z;
-//_____________________________________________________________________________
-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 expectedNumberOfClusters = 0;
+ Bool_t lookForCluster;
- for (Int_t i=0; i<AliTRDgeometry::Nsect(); i++) sec[i].SetUp();
+ alpha=AliTRDgeometry::GetAlpha(); // note: change in meaning
- // Sort clusters into AliTRDtimeBin's within AliTRDtrackSector's
+
+ 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,x0,lookForCluster);
+ x = fTrSec[s]->GetLayer(nr)->GetX()-dx/2; y = t.GetY(); z = t.GetZ();
+ if(!t.PropagateTo(x,x0,rho,0.139)) 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,x0,rho,0.139)) break;
+ } else if (y <-ymax) {
+ s = (s-1+ns) % ns;
+ if (!t.Rotate(-alpha)) break;
+ if(!t.PropagateTo(x,x0,rho,0.139)) break;
+ }
- cerr<<"SetUpSectors: 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(), localTimeBin=c->GetLocalTimeBin();
- Int_t sector=fGeom->GetSector(detector);
+ 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,x0,lookForCluster);
+ x = fTrSec[s]->GetLayer(nr-1)->GetX(); y = t.GetY(); z = t.GetZ();
+ if(!t.PropagateTo(x,x0,rho,0.139)) 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,x0,rho,0.139)) break;
+ } else if (y <-ymax) {
+ s = (s-1+ns) % ns;
+ if (!t.Rotate(-alpha)) break;
+ if(!t.PropagateTo(x,x0,rho,0.139)) break;
+ }
- Int_t trackingSector = AliTRDgeometry::kNsect - sector - 1;
- Int_t tb=sec[sector].GetTimeBin(detector,localTimeBin);
- index=ncl;
- sec[trackingSector][tb].InsertCluster(c,index);
+ if(lookForCluster) {
- }
- printf("\r\n");
-}
+ expectedNumberOfClusters++;
-//_____________________________________________________________________________
-void AliTRDtracker::MakeSeeds(Int_t inner, Int_t outer,
- AliTRDtrackingSector* fTrSec, Int_t turn,
- TH1F *hs, TH1F *hd)
-{
- //
- // Creates track seeds using clusters in timeBins=i1,i2
- //
+ wIndex = (Float_t) t.GetLabel();
+ wTB = nr;
- Int_t i2 = inner, i1 = outer;
- Int_t ti[3], to[3];
- Int_t nprim = 85600/2;
+ AliTRDpropagationLayer& time_bin=*(fTrSec[s]->GetLayer(nr-1));
- TH1F *hsame = hs;
- TH1F *hdiff = hd;
- Bool_t match = false;
- Int_t matchedIndex;
- // find seeds
+ Double_t sy2=ExpectedSigmaY2(x,t.GetTgl(),t.GetPt());
- 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);
+ Double_t sz2=ExpectedSigmaZ2(x,t.GetTgl());
- Double_t x1 =fTrSec[0].GetX(i1);
- Double_t xx2=fTrSec[0].GetX(i2);
+ 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;
+
+ if (road>fWideRoad) {
+ if (t.GetNumberOfClusters()>4)
+ cerr<<t.GetNumberOfClusters()
+ <<"FindProlongation warning: Too broad road !\n";
+ return 0;
+ }
+
+ AliTRDcluster *cl=0;
+ UInt_t index=0;
+
+ Double_t max_chi2=fMaxChi2;
+
+ wYclosest = 12345678;
+ wYcorrect = 12345678;
+ wZclosest = 12345678;
+ wZcorrect = 12345678;
+ wZwindow = TMath::Sqrt(2.25 * 12 * sz2);
+
+ // Find the closest correct cluster for debugging purposes
+ if (time_bin) {
+ Float_t minDY = 1000000;
+ for (Int_t i=0; i<time_bin; i++) {
+ AliTRDcluster* c=(AliTRDcluster*)(time_bin[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();
+ wChi2 = t.GetPredictedChi2(c);
+ }
+ }
+ // Now go for the real cluster search
- printf("\n");
+ if (time_bin) {
- if((turn != 1)&&(turn != 2)) {
- printf("*** Error in MakeSeeds: unexpected turn = %d \n", turn);
- return;
- }
+ 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) > 3 * 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) {
+
+ 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) > 2.25 * 12 * 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) {
+ wYclosest = cl->GetY();
+ wZclosest = cl->GetZ();
- for (Int_t ns=0; ns<maxSec; ns++) {
+ t.SetSampledEdx(cl->GetQ()/dx,t.GetNumberOfClusters());
+ if(!t.Update(cl,max_chi2,index)) {
+ if(!try_again--) return 0;
+ }
+ else try_again=fMaxGap;
+ }
+ else {
+ if (try_again==0) break;
+ try_again--;
+ }
- printf("\n MakeSeeds: sector %d \n", ns);
+ /*
+ if((((Int_t) wTB)%15 == 0) || (((Int_t) wTB)%15 == 14)) {
+
+ printf(" %f", wIndex); //1
+ printf(" %f", wTB); //2
+ printf(" %f", wYrt); //3
+ printf(" %f", wYclosest); //4
+ printf(" %f", wYcorrect); //5
+ printf(" %f", wYwindow); //6
+ printf(" %f", wZrt); //7
+ printf(" %f", wZclosest); //8
+ printf(" %f", wZcorrect); //9
+ printf(" %f", wZwindow); //10
+ printf(" %f", wPx); //11
+ printf(" %f", wPy); //12
+ printf(" %f", wPz); //13
+ printf(" %f", wSigmaC2*1000000); //14
+ printf(" %f", wSigmaTgl2*1000); //15
+ printf(" %f", wSigmaY2); //16
+ // printf(" %f", wSigmaZ2); //17
+ printf(" %f", wChi2); //17
+ printf(" %f", wC); //18
+ printf("\n");
+ }
+ */
+ }
+ }
+ }
+ return expectedNumberOfClusters;
+
+
+}
- Int_t nl2=fTrSec[(ns-2+maxSec)%maxSec][i2];
- Int_t nl=fTrSec[(ns-1+maxSec)%maxSec][i2];
- Int_t nm=fTrSec[ns][i2];
- Int_t nu=fTrSec[(ns+1)%maxSec][i2];
- Int_t nu2=fTrSec[(ns+2)%maxSec][i2];
+//___________________________________________________________________
- AliTRDtimeBin& r1=fTrSec[ns][i1];
+Int_t AliTRDtracker::FollowBackProlongation(AliTRDtrack& t)
+{
+ // 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
- for (Int_t is=0; is < r1; is++) {
- Double_t y1=r1[is]->GetY(), z1=r1[is]->GetZ();
- for(Int_t ii=0; ii<3; ii++) to[ii] = r1[is]->GetTrackIndex(ii);
+ 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;
- 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.;
+ Int_t trackIndex = t.GetLabel();
- if (js<nl2) {
- if(turn != 2) continue;
- AliTRDtimeBin& r2=fTrSec[(ns-2+maxSec)%maxSec][i2];
- cl=r2[js];
- y2=cl->GetY(); z2=cl->GetZ();
- for(Int_t ii=0; ii<3; ii++) ti[ii] = cl->GetTrackIndex(ii);
+ Int_t ns=Int_t(2*TMath::Pi()/AliTRDgeometry::GetAlpha()+0.5);
- x2= xx2*cs2+y2*sn2;
- y2=-xx2*sn2+y2*cs2;
- }
- else if (js<nl2+nl) {
- if(turn != 1) continue;
- AliTRDtimeBin& r2=fTrSec[(ns-1+maxSec)%maxSec][i2];
- cl=r2[js-nl2];
- y2=cl->GetY(); z2=cl->GetZ();
- for(Int_t ii=0; ii<3; ii++) ti[ii] = cl->GetTrackIndex(ii);
+ Int_t try_again=fMaxGap;
- x2= xx2*cs+y2*sn;
- y2=-xx2*sn+y2*cs;
+ Double_t alpha=t.GetAlpha();
- }
- else if (js<nl2+nl+nm) {
- if(turn != 1) continue;
- AliTRDtimeBin& r2=fTrSec[ns][i2];
- cl=r2[js-nl2-nl];
- x2=xx2; y2=cl->GetY(); z2=cl->GetZ();
- for(Int_t ii=0; ii<3; ii++) ti[ii] = cl->GetTrackIndex(ii);
- }
- else if (js<nl2+nl+nm+nu) {
- if(turn != 1) continue;
- AliTRDtimeBin& r2=fTrSec[(ns+1)%maxSec][i2];
- cl=r2[js-nl2-nl-nm];
- y2=cl->GetY(); z2=cl->GetZ();
- for(Int_t ii=0; ii<3; ii++) ti[ii] = cl->GetTrackIndex(ii);
+ if (alpha > 2.*TMath::Pi()) alpha -= 2.*TMath::Pi();
+ if (alpha < 0. ) alpha += 2.*TMath::Pi();
- x2=xx2*cs-y2*sn;
- y2=xx2*sn+y2*cs;
+ Int_t s=Int_t(alpha/AliTRDgeometry::GetAlpha())%AliTRDgeometry::kNsect;
- }
- else {
- if(turn != 2) continue;
- AliTRDtimeBin& r2=fTrSec[(ns+2)%maxSec][i2];
- cl=r2[js-nl2-nl-nm-nu];
- y2=cl->GetY(); z2=cl->GetZ();
- for(Int_t ii=0; ii<3; ii++) ti[ii] = cl->GetTrackIndex(ii);
-
- x2=xx2*cs2-y2*sn2;
- y2=xx2*sn2+y2*cs2;
- }
-
+ Int_t outerTB = fTrSec[0]->GetOuterTimeBin();
- match = false;
- matchedIndex = -1;
- for (Int_t ii=0; ii<3; ii++) {
- // cerr<<"ti["<<ii<<"] = "<<ti[ii]<<"; to["<<ii<<"] = "<<to[ii]<<endl;
- if(ti[ii] < 0) continue;
- if(ti[ii] >= nprim) continue;
- for (Int_t kk=0; kk<3; kk++) {
- if(to[kk] < 0) continue;
- if(to[kk] >= nprim) continue;
- if(ti[ii] == to[kk]) {
- //cerr<<"ti["<<ii<<"] = "<<ti[ii]<<" = "<<to[kk]<<" = to["<<kk<<"]"<<endl;
- matchedIndex = ti[ii];
- match = true;
- }
- }
- }
-
- if(TMath::Abs(z1-z2) > fgkMaxSeedDeltaZ12) continue;
+ Double_t x0, rho, x, dx, y, ymax, z;
- Double_t zz=z1 - z1/x1*(x1-x2);
+ Bool_t lookForCluster;
- if (TMath::Abs(zz-z2)>fgkMaxSeedDeltaZ) continue;
+ Int_t expectedNumberOfClusters = 0;
+ x = t.GetX();
- Double_t d=(x2-x1)*(0.-y2)-(0.-x2)*(y2-y1);
- if (d==0.) {cerr<<"TRD MakeSeeds: Straight seed !\n"; continue;}
+ alpha=AliTRDgeometry::GetAlpha(); // note: change in meaning
- x[0]=y1;
- x[1]=z1;
- x[2]=f1trd(x1,y1,x2,y2,x3,y3);
- if (TMath::Abs(x[2]) > fgkMaxSeedC) continue;
+ for (Int_t nr=fTrSec[0]->GetLayerNumber(t.GetX()); nr<outerTB; nr++) {
- x[3]=f2trd(x1,y1,x2,y2,x3,y3);
+ y = t.GetY(); z = t.GetZ();
- if (TMath::Abs(x[2]*x1-x[3]) >= 0.99999) continue;
+ // first propagate to the outer surface of the current time bin
- x[4]=f3trd(x1,y1,x2,y2,z1,z2);
+ fTrSec[s]->GetLayer(nr)->GetPropagationParameters(y,z,dx,rho,x0,lookForCluster);
+ x = fTrSec[s]->GetLayer(nr)->GetX()+dx/2; y = t.GetY(); z = t.GetZ();
- if (TMath::Abs(x[4]) > fgkMaxSeedTan) continue;
+ if(!t.PropagateTo(x,x0,rho,0.139)) break;
- Double_t a=asin(x[3]);
- Double_t zv=z1 - x[4]/x[2]*(a+asin(x[2]*x1-x[3]));
+ y = t.GetY();
+ ymax = x*TMath::Tan(0.5*alpha);
- if (TMath::Abs(zv)>fgkMaxSeedVertexZ) continue;
+ if (y > ymax) {
+ s = (s+1) % ns;
+ if (!t.Rotate(alpha)) break;
+ if(!t.PropagateTo(x,x0,rho,0.139)) break;
+ } else if (y <-ymax) {
+ s = (s-1+ns) % ns;
+ if (!t.Rotate(-alpha)) break;
+ if(!t.PropagateTo(x,x0,rho,0.139)) break;
+ }
+ y = t.GetY(); z = t.GetZ();
- 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;
+ // now propagate to the middle plane of the next time bin
+ fTrSec[s]->GetLayer(nr+1)->GetPropagationParameters(y,z,dx,rho,x0,lookForCluster);
- 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 = fTrSec[s]->GetLayer(nr+1)->GetX(); y = t.GetY(); z = t.GetZ();
- 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;
+ if(!t.PropagateTo(x,x0,rho,0.139)) break;
- UInt_t index=r1.GetIndex(is);
-
- AliTRDtrack *track=new AliTRDtrack(r1[is],index,x,c,x1,ns*alpha+shift);
+ y = t.GetY();
- Int_t rc=FindProlongation(*track,fTrSec,ns,i2,matchedIndex,hsame,hdiff);
+ ymax = x*TMath::Tan(0.5*alpha);
- // if (match) hsame->Fill((Float_t) track->GetNclusters());
- // else hdiff->Fill((Float_t) track->GetNclusters());
- // delete track;
- // continue;
+ if(fVocal) printf("nr+1=%d, x %f, z %f, y %f, ymax %f\n",nr+1,x,z,y,ymax);
+
+ if (y > ymax) {
+ s = (s+1) % ns;
+ if (!t.Rotate(alpha)) break;
+ if(!t.PropagateTo(x,x0,rho,0.139)) break;
+ } else if (y <-ymax) {
+ s = (s-1+ns) % ns;
+ if (!t.Rotate(-alpha)) break;
+ if(!t.PropagateTo(x,x0,rho,0.139)) break;
+ }
- if ((rc < 0) ||
- (track->GetNclusters() < (i1-i2)*fgkMinClustersInSeed)) delete track;
- else {
- fSeeds->AddLast(track); fNseeds++;
- printf("\r found seed %d ", fNseeds);
+ // printf("label %d, pl %d, lookForCluster %d \n",
+ // trackIndex, nr+1, lookForCluster);
+
+ if(lookForCluster) {
+ expectedNumberOfClusters++;
+
+ wIndex = (Float_t) t.GetLabel();
+ wTB = fTrSec[s]->GetLayer(nr+1)->GetTimeBinIndex();
+
+ AliTRDpropagationLayer& time_bin=*(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;
+ 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;
+
+ if (road>fWideRoad) {
+ if (t.GetNumberOfClusters()>4)
+ cerr<<t.GetNumberOfClusters()
+ <<"FindProlongation warning: Too broad road !\n";
+ return 0;
+ }
+
+ AliTRDcluster *cl=0;
+ UInt_t index=0;
+
+ Double_t max_chi2=fMaxChi2;
+
+ wYclosest = 12345678;
+ wYcorrect = 12345678;
+ wZclosest = 12345678;
+ wZcorrect = 12345678;
+ wZwindow = TMath::Sqrt(2.25 * 12 * sz2);
+
+ // Find the closest correct cluster for debugging purposes
+ if (time_bin) {
+ Float_t minDY = 1000000;
+ for (Int_t i=0; i<time_bin; i++) {
+ AliTRDcluster* c=(AliTRDcluster*)(time_bin[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();
+ wChi2 = t.GetPredictedChi2(c);
}
- }
- }
- }
+ }
- fSeeds->Sort();
-}
+ // Now go for the real cluster search
-//_____________________________________________________________________________
-void AliTRDtracker::ReadClusters(TObjArray *array, const Char_t *filename)
-{
- //
+ 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) > 3 * 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) {
+
+ 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) > 2.25 * 12 * 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) {
+ wYclosest = cl->GetY();
+ wZclosest = cl->GetZ();
+
+ t.SetSampledEdx(cl->GetQ()/dx,t.GetNumberOfClusters());
+ if(!t.Update(cl,max_chi2,index)) {
+ if(!try_again--) return 0;
+ }
+ else try_again=fMaxGap;
+ }
+ else {
+ if (try_again==0) break;
+ try_again--;
+ }
+
+ /*
+ if((((Int_t) wTB)%15 == 0) || (((Int_t) wTB)%15 == 14)) {
+
+ printf(" %f", wIndex); //1
+ printf(" %f", wTB); //2
+ printf(" %f", wYrt); //3
+ printf(" %f", wYclosest); //4
+ printf(" %f", wYcorrect); //5
+ printf(" %f", wYwindow); //6
+ printf(" %f", wZrt); //7
+ printf(" %f", wZclosest); //8
+ printf(" %f", wZcorrect); //9
+ printf(" %f", wZwindow); //10
+ printf(" %f", wPx); //11
+ printf(" %f", wPy); //12
+ printf(" %f", wPz); //13
+ printf(" %f", wSigmaC2*1000000); //14
+ printf(" %f", wSigmaTgl2*1000); //15
+ printf(" %f", wSigmaY2); //16
+ // printf(" %f", wSigmaZ2); //17
+ printf(" %f", wChi2); //17
+ printf(" %f", wC); //18
+ printf("\n");
+ }
+ */
+ }
+ }
+ }
+ return expectedNumberOfClusters;
+}
+
+//___________________________________________________________________
+
+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 x0, 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,x0,lookForCluster);
+ x = fTrSec[s]->GetLayer(nr)->GetX()+dx/2; y = t.GetY(); z = t.GetZ();
+ if(!t.PropagateTo(x,x0,rho,0.139)) 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,x0,rho,0.139)) 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,x0,lookForCluster);
+ x = fTrSec[s]->GetLayer(nr+1)->GetX(); y = t.GetY(); z = t.GetZ();
+ if(!t.PropagateTo(x,x0,rho,0.139)) 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,x0,rho,0.139)) return 0;
+ }
+ return 1;
+}
+
+//___________________________________________________________________
+
+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
+
+ 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 x0, rho, x, dx, y, ymax, z;
+
+ x = t.GetX();
+
+ alpha=AliTRDgeometry::GetAlpha(); // note: change in meaning
+
+ Int_t plTPC = fTrSec[0]->GetLayerNumber(246.055);
+
+ for (Int_t nr=fTrSec[0]->GetLayerNumber(x); nr>plTPC; 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,x0,lookForCluster);
+ x = fTrSec[s]->GetLayer(nr)->GetX()-dx/2; y = t.GetY(); z = t.GetZ();
+ if(!t.PropagateTo(x,x0,rho,0.139)) 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,x0,rho,0.139)) 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,x0,lookForCluster);
+ x = fTrSec[s]->GetLayer(nr-1)->GetX(); y = t.GetY(); z = t.GetZ();
+ if(!t.PropagateTo(x,x0,rho,0.139)) 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,x0,rho,0.139)) return 0;
+ }
+ return 1;
+}
+
+
+//_____________________________________________________________________________
+void AliTRDtracker::LoadEvent()
+{
+ // Fills clusters into TRD tracking_sectors
+ // Note that the numbering scheme for the TRD tracking_sectors
+ // differs from that of TRD sectors
+
+ ReadClusters(fClusters);
+ Int_t ncl=fClusters->GetEntriesFast();
+ cout<<"\n LoadSectors: sorting "<<ncl<<" clusters"<<endl;
+
+ 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 plane=fGeom->GetPlane(detector);
+
+ Int_t tracking_sector = CookSectorIndex(sector);
+
+ Int_t gtb = fTrSec[tracking_sector]->CookTimeBinIndex(plane,local_time_bin);
+ Int_t layer = fTrSec[tracking_sector]->GetLayerNumber(gtb);
+
+ index=ncl;
+ fTrSec[tracking_sector]->GetLayer(layer)->InsertCluster(c,index);
+ }
+ printf("\r\n");
+
+}
+
+//_____________________________________________________________________________
+void AliTRDtracker::UnloadEvent()
+{
+ //
+ // Clears the arrays of clusters and tracks. Resets sectors and timebins
+ //
+
+ Int_t i, nentr;
+
+ nentr = fClusters->GetEntriesFast();
+ for (i = 0; i < nentr; i++) delete fClusters->RemoveAt(i);
+
+ nentr = fSeeds->GetEntriesFast();
+ for (i = 0; i < nentr; i++) delete fSeeds->RemoveAt(i);
+
+ nentr = fTracks->GetEntriesFast();
+ for (i = 0; i < nentr; i++) delete fTracks->RemoveAt(i);
+
+ Int_t nsec = AliTRDgeometry::kNsect;
+
+ for (i = 0; i < nsec; i++) {
+ for(Int_t pl = 0; pl < fTrSec[i]->GetNumberOfLayers(); pl++) {
+ fTrSec[i]->GetLayer(pl)->Clear();
+ }
+ }
+
+}
+
+//__________________________________________________________________________
+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 max_sec=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<max_sec; ns++) {
+
+ Int_t nl2 = *(fTrSec[(ns-2+max_sec)%max_sec]->GetLayer(i2));
+ Int_t nl=(*fTrSec[(ns-1+max_sec)%max_sec]->GetLayer(i2));
+ Int_t nm=(*fTrSec[ns]->GetLayer(i2));
+ Int_t nu=(*fTrSec[(ns+1)%max_sec]->GetLayer(i2));
+ Int_t nu2=(*fTrSec[(ns+2)%max_sec]->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+max_sec)%max_sec]->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+max_sec)%max_sec]->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)%max_sec]->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)%max_sec]->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) > fMaxSeedDeltaZ12) continue;
+
+ Double_t zz=z1 - z1/x1*(x1-x2);
+
+ if (TMath::Abs(zz-z2)>fMaxSeedDeltaZ) 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[2]=f1trd(x1,y1,x2,y2,x3,y3);
+
+ if (TMath::Abs(x[2]) > fMaxSeedC) continue;
+
+ x[3]=f2trd(x1,y1,x2,y2,x3,y3);
+
+ if (TMath::Abs(x[2]*x1-x[3]) >= 0.99999) continue;
+
+ x[4]=f3trd(x1,y1,x2,y2,z1,z2);
+
+ if (TMath::Abs(x[4]) > fMaxSeedTan) continue;
+
+ 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)>fMaxSeedVertexZ) continue;
+
+ Double_t sy1=r1[is]->GetSigmaY2(), sz1=r1[is]->GetSigmaZ2();
+ Double_t sy2=cl->GetSigmaY2(), sz2=cl->GetSigmaZ2();
+ Double_t sy3=fSeedErrorSY3, sy=fSeedErrorSY, sz=fSeedErrorSZ;
+
+ 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;
+
+ 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;
+
+ 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)*fMinClustersInSeed)) delete track;
+ else {
+ fSeeds->AddLast(track); fNseeds++;
+ cerr<<"\r found seed "<<fNseeds;
+ }
+ }
+ }
+ }
+}
+
+//_____________________________________________________________________________
+void AliTRDtracker::ReadClusters(TObjArray *array, const TFile *inp)
+{
+ //
// 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()
TDirectory *savedir=gDirectory;
- TFile *file = TFile::Open(filename);
- if (!file->IsOpen()) {printf("Can't open file %s !\n",filename); return;}
+ if (inp) {
+ TFile *in=(TFile*)inp;
+ if (!in->IsOpen()) {
+ cerr<<"AliTRDtracker::ReadClusters(): input file is not open !\n";
+ return;
+ }
+ else{
+ in->cd();
+ }
+ }
Char_t treeName[12];
sprintf(treeName,"TreeR%d_TRD",fEvent);
- TTree *clusterTree = (TTree*) file->Get(treeName);
-
- TObjArray *clusterArray = new TObjArray(400);
-
- clusterTree->GetBranch("TRDcluster")->SetAddress(&clusterArray);
+ TTree *ClusterTree = (TTree*) gDirectory->Get(treeName);
+
+ TObjArray *ClusterArray = new TObjArray(400);
+
+ ClusterTree->GetBranch("TRDcluster")->SetAddress(&ClusterArray);
+
+ Int_t nEntries = (Int_t) ClusterTree->GetEntries();
+ printf("found %d entries in %s.\n",nEntries,ClusterTree->GetName());
- 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;
AliTRDcluster *c = 0;
+ printf("\n");
for (Int_t iEntry = 0; iEntry < nEntries; iEntry++) {
// Import the tree
- nbytes += clusterTree->GetEvent(iEntry);
-
+ nbytes += ClusterTree->GetEvent(iEntry);
+
// Get the number of points in the detector
- Int_t nCluster = clusterArray->GetEntriesFast();
- printf("Read %d clusters from entry %d \n", nCluster, iEntry);
-
+ 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);
+ c = (AliTRDcluster*)ClusterArray->UncheckedAt(iCluster);
AliTRDcluster *co = new AliTRDcluster(*c);
co->SetSigmaY2(c->GetSigmaY2() * fSY2corr);
+ Int_t ltb = co->GetLocalTimeBin();
+ if(ltb != 0) co->SetSigmaZ2(c->GetSigmaZ2() * fSZ2corr);
+
array->AddLast(co);
- delete clusterArray->RemoveAt(iCluster);
+ delete ClusterArray->RemoveAt(iCluster);
}
}
- file->Close();
- delete clusterArray;
- savedir->cd();
-
+ delete ClusterArray;
+ savedir->cd();
+
}
-//___________________________________________________________________
-void AliTRDtracker::FindTracks(AliTRDtrackingSector* fTrSec, TH1F *hs, TH1F *hd)
+//______________________________________________________________________
+void AliTRDtracker::ReadClusters(TObjArray *array, const Char_t *filename)
{
//
- // Finds tracks in TRD
+ // Reads AliTRDclusters from file <filename>. The names of the cluster
+ // tree and branches should match the ones used in
+ // AliTRDclusterizer::WriteClusters()
+ // if <array> == 0, clusters are added into AliTRDtracker fCluster array
//
- TH1F *hsame = hs;
- TH1F *hdiff = hd;
+ TDirectory *savedir=gDirectory;
- Int_t numOfTimeBins = fTrSec[0].GetNtimeBins();
- Int_t nseed=fSeeds->GetEntriesFast();
+ TFile *file = TFile::Open(filename);
+ if (!file->IsOpen()) {
+ cerr<<"Can't open file with TRD clusters"<<endl;
+ return;
+ }
- Int_t nSeedClusters;
- for (Int_t i=0; i<nseed; i++) {
- cerr<<"FindTracks: seed "<<i+1<<" out of "<<nseed<<endl;
+ Char_t treeName[12];
+ sprintf(treeName,"TreeR%d_TRD",fEvent);
+ TTree *ClusterTree = (TTree*) gDirectory->Get(treeName);
- AliTRDtrack& t=*((AliTRDtrack*)fSeeds->UncheckedAt(i));
+ if (!ClusterTree) {
+ cerr<<"AliTRDtracker::ReadClusters(): ";
+ cerr<<"can't get a tree with clusters !\n";
+ return;
+ }
- nSeedClusters = t.GetNclusters();
- Double_t alpha=t.GetAlpha();
+ TObjArray *ClusterArray = new TObjArray(400);
- 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;
+ ClusterTree->GetBranch("TRDcluster")->SetAddress(&ClusterArray);
- Int_t label = GetTrackLabel(t);
+ Int_t nEntries = (Int_t) ClusterTree->GetEntries();
+ cout<<"found "<<nEntries<<" in ClusterTree"<<endl;
- if (FindProlongation(t,fTrSec,ns,0,label,hsame,hdiff)) {
- cerr<<"No of clusters in the track = "<<t.GetNclusters()<<endl;
- if (t.GetNclusters() >= Int_t(fgkMinClustersInTrack*numOfTimeBins)) {
- Int_t label = GetTrackLabel(t);
- t.SetLabel(label);
- t.CookdEdx();
- UseClusters(t);
+ // Loop through all entries in the tree
+ Int_t nbytes;
+ AliTRDcluster *c = 0;
- AliTRDtrack *pt = new AliTRDtrack(t);
- fTracks->AddLast(pt); fNtracks++;
+ printf("\n");
- cerr<<"found track "<<fNtracks<<endl;
- }
- }
- delete fSeeds->RemoveAt(i);
- fNseeds--;
- }
-}
+ for (Int_t iEntry = 0; iEntry < nEntries; iEntry++) {
-//__________________________________________________________________
-void AliTRDtracker::UseClusters(AliTRDtrack t)
-{
- //
- // Mark used cluster
- //
+ // Import the tree
+ nbytes += ClusterTree->GetEvent(iEntry);
- 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();
+ // 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);
+ AliTRDcluster *co = new AliTRDcluster(*c);
+ co->SetSigmaY2(c->GetSigmaY2() * fSY2corr);
+ Int_t ltb = co->GetLocalTimeBin();
+ if(ltb != 0) co->SetSigmaZ2(c->GetSigmaZ2() * fSZ2corr);
+ array->AddLast(co);
+ delete ClusterArray->RemoveAt(iCluster);
+ }
}
-}
+ file->Close();
+ delete ClusterArray;
+ savedir->cd();
+
+}
+
//__________________________________________________________________
-Int_t AliTRDtracker::GetTrackLabel(AliTRDtrack t)
-{
- //
- // Get MC label
- //
+void AliTRDtracker::CookLabel(AliKalmanTrack* pt, Float_t wrong) const {
Int_t label=123456789, index, i, j;
- Int_t ncl=t.GetNclusters();
- const Int_t kRange = AliTRDgeometry::kNplan * fGeom->GetTimeMax();
- Bool_t labelAdded;
+ Int_t ncl=pt->GetNumberOfClusters();
+ const Int_t range = fTrSec[0]->GetOuterTimeBin()+1;
+
+ Bool_t label_added;
- // Int_t s[kRange][2];
- Int_t **s = new Int_t* [kRange];
- for (i=0; i<kRange; i++) {
+ // Int_t s[range][2];
+ Int_t **s = new Int_t* [range];
+ for (i=0; i<range; i++) {
s[i] = new Int_t[2];
}
- for (i=0; i<kRange; i++) {
+ for (i=0; i<range; 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);
- labelAdded=kFALSE; j=0;
+ label=c->GetLabel(k);
+ label_added=kFALSE; j=0;
if (label >= 0) {
- while ( (!labelAdded) && ( j < kRange ) ) {
+ 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;
- labelAdded=kTRUE;
+ label_added=kTRUE;
}
j++;
}
Int_t max=0;
label = -123456789;
- for (i=0; i<kRange; i++) {
+ for (i=0; i<range; i++) {
if (s[i][1]>max) {
max=s[i][1]; label=s[i][0];
}
}
+
+ for (i=0; i<range; i++) {
+ delete []s[i];
+ }
+
delete []s;
- if(max > ncl*fgkLabelFraction) return label;
- else return -1;
+
+ if ((1.- Float_t(max)/ncl) > wrong) label=-label;
+
+ pt->SetLabel(label);
+
}
-//___________________________________________________________________
-Int_t AliTRDtracker::WriteTracks(const Char_t *filename)
+
+//__________________________________________________________________
+void AliTRDtracker::UseClusters(const AliKalmanTrack* t, Int_t from = 0) const {
+ 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 r, Double_t tgl, Double_t pt)
+{
+ // Parametrised "expected" error of the cluster reconstruction in Y
+
+ Double_t s = 0.08 * 0.08;
+ return s;
+}
+
+//_____________________________________________________________________
+Double_t AliTRDtracker::ExpectedSigmaZ2(Double_t r, Double_t tgl)
{
+ // Parametrised "expected" error of the cluster reconstruction in Z
+
+ Double_t s = 6 * 6 /12.;
+ return s;
+}
+
+
+//_____________________________________________________________________
+Double_t AliTRDtracker::GetX(Int_t sector, Int_t plane, Int_t local_tb) const
+{
+ //
+ // Returns radial position which corresponds to time bin <local_tb>
+ // in tracking sector <sector> and plane <plane>
+ //
+
+ Int_t index = fTrSec[sector]->CookTimeBinIndex(plane, local_tb);
+ Int_t pl = fTrSec[sector]->GetLayerNumber(index);
+ return fTrSec[sector]->GetLayer(pl)->GetX();
+
+}
+
+
+//_______________________________________________________
+AliTRDtracker::AliTRDpropagationLayer::AliTRDpropagationLayer(Double_t x,
+ Double_t dx, Double_t rho, Double_t x0, Int_t tb_index)
+{
//
- // Write the tracks to the output file
+ // AliTRDpropagationLayer constructor
//
- TDirectory *savedir=gDirectory;
+ fN = 0; fX = x; fdX = dx; fRho = rho; fX0 = x0;
+ fClusters = NULL; fIndex = NULL; fTimeBinIndex = tb_index;
+
- //TFile *out=TFile::Open(filename,"RECREATE");
- TFile *out = (TFile*) gROOT->GetListOfFiles()->FindObject(filename);
- if (!out) {
- printf("AliTRDtracker::Open -- ");
- printf("Open the ALIROOT-file %s.\n",filename);
- out = new TFile(filename,"RECREATE");
+ for(Int_t i=0; i < (Int_t) kZONES; i++) {
+ fZc[i]=0; fZmax[i] = 0;
}
- else {
- printf("AliTRDtracker::Open -- ");
- printf("%s is already open.\n",filename);
+
+ fYmax = 0;
+
+ if(fTimeBinIndex >= 0) {
+ fClusters = new (AliTRDcluster*)[kMAX_CLUSTER_PER_TIME_BIN];
+ fIndex = new (UInt_t)[kMAX_CLUSTER_PER_TIME_BIN];
}
- Char_t treeName[12];
- sprintf(treeName,"TreeT%d_TRD",fEvent);
- TTree tracktree(treeName,"Tree with TRD tracks");
+ fHole = kFALSE;
+ fHoleZc = 0;
+ fHoleZmax = 0;
+ fHoleYc = 0;
+ fHoleYmax = 0;
+ fHoleRho = 0;
+ fHoleX0 = 0;
+
+}
+
+//_______________________________________________________
+void AliTRDtracker::AliTRDpropagationLayer::SetHole(
+ Double_t Zmax, Double_t Ymax, Double_t rho,
+ Double_t x0, Double_t Yc, Double_t Zc)
+{
+ //
+ // Sets hole in the layer
+ //
+
+ fHole = kTRUE;
+ fHoleZc = Zc;
+ fHoleZmax = Zmax;
+ fHoleYc = Yc;
+ fHoleYmax = Ymax;
+ fHoleRho = rho;
+ fHoleX0 = x0;
+}
+
- AliTRDtrack *iotrack=0;
- tracktree.Branch("tracks","AliTRDtrack",&iotrack,32000,0);
+//_______________________________________________________
+AliTRDtracker::AliTRDtrackingSector::AliTRDtrackingSector(AliTRDgeometry* geo, Int_t gs, AliTRDparameter* par)
+{
+ //
+ // AliTRDtrackingSector Constructor
+ //
+
+ fGeom = geo;
+ fPar = par;
+ fGeomSector = gs;
+ fTzeroShift = 0.13;
+ fN = 0;
+
+ for(UInt_t i=0; i < kMAX_TIME_BIN_INDEX; i++) fTimeBinIndex[i] = -1;
+
+
+ AliTRDpropagationLayer* ppl;
+
+ Double_t x, xin, xout, dx, rho, x0;
+ Int_t steps;
- Int_t ntracks=fTracks->GetEntriesFast();
+ // set time bins in the gas of the TPC
- 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;
+ xin = 246.055; xout = 254.055; steps = 20; dx = (xout-xin)/steps;
+ rho = 0.9e-3; x0 = 28.94;
+
+ for(Int_t i=0; i<steps; i++) {
+ x = xin + i*dx + dx/2;
+ ppl = new AliTRDpropagationLayer(x,dx,rho,x0,-1);
+ InsertLayer(ppl);
}
- tracktree.Write();
- out->Close();
+ // set time bins in the outer field cage vessel
- savedir->cd();
+ dx = 50e-4; xin = xout; xout = xin + dx; rho = 1.71; x0 = 44.77; // Tedlar
+ ppl = new AliTRDpropagationLayer(xin+dx/2,dx,rho,x0,-1);
+ InsertLayer(ppl);
- cerr<<"WriteTracks: done"<<endl;
- return 1;
+ dx = 0.02; xin = xout; xout = xin + dx; rho = 1.45; x0 = 44.86; // prepreg
+ ppl = new AliTRDpropagationLayer(xin+dx/2,dx,rho,x0,-1);
+ InsertLayer(ppl);
+
+ dx = 2.; xin = xout; xout = xin + dx; rho = 1.45*0.02; x0 = 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,x0,-1);
+ InsertLayer(ppl);
+ }
+
+ dx = 0.02; xin = xout; xout = xin + dx; rho = 1.45; x0 = 44.86; // prepreg
+ ppl = new AliTRDpropagationLayer(xin+dx/2,dx,rho,x0,-1);
+ InsertLayer(ppl);
+
+ dx = 50e-4; xin = xout; xout = xin + dx; rho = 1.71; x0 = 44.77; // Tedlar
+ ppl = new AliTRDpropagationLayer(xin+dx/2,dx,rho,x0,-1);
+ InsertLayer(ppl);
+
+ // set time bins in CO2
+
+ xin = xout; xout = 275.0;
+ steps = 50; dx = (xout - xin)/steps;
+ rho = 1.977e-3; x0 = 36.2;
+
+ for(Int_t i=0; i<steps; i++) {
+ x = xin + i*dx + dx/2;
+ ppl = new AliTRDpropagationLayer(x,dx,rho,x0,-1);
+ InsertLayer(ppl);
+ }
+
+ // set time bins in the outer containment vessel
+
+ dx = 50e-4; xin = xout; xout = xin + dx; rho = 2.7; x0 = 24.01; // Al
+ ppl = new AliTRDpropagationLayer(xin+dx/2,dx,rho,x0,-1);
+ InsertLayer(ppl);
+
+ dx = 50e-4; xin = xout; xout = xin + dx; rho = 1.71; x0 = 44.77; // Tedlar
+ ppl = new AliTRDpropagationLayer(xin+dx/2,dx,rho,x0,-1);
+ InsertLayer(ppl);
+
+ dx = 0.06; xin = xout; xout = xin + dx; rho = 1.45; x0 = 44.86; // prepreg
+ ppl = new AliTRDpropagationLayer(xin+dx/2,dx,rho,x0,-1);
+ InsertLayer(ppl);
+
+ dx = 3.; xin = xout; xout = xin + dx; rho = 1.45*0.02; x0 = 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,x0,-1);
+ InsertLayer(ppl);
+ }
+
+ dx = 0.06; xin = xout; xout = xin + dx; rho = 1.45; x0 = 44.86; // prepreg
+ ppl = new AliTRDpropagationLayer(xin+dx/2,dx,rho,x0,-1);
+ InsertLayer(ppl);
+
+ dx = 50e-4; xin = xout; xout = xin + dx; rho = 1.71; x0 = 44.77; // Tedlar
+ ppl = new AliTRDpropagationLayer(xin+dx/2,dx,rho,x0,-1);
+ InsertLayer(ppl);
+
+ dx = 50e-4; xin = xout; xout = xin + dx; rho = 2.7; x0 = 24.01; // Al
+ ppl = new AliTRDpropagationLayer(xin+dx/2,dx,rho,x0,-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; x0 = 36.66;
+
+ for(Int_t i=0; i<steps; i++) {
+ x = xin + i*dx + dx/2;
+ ppl = new AliTRDpropagationLayer(x,dx,rho,x0,-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 tbBefore = (Int_t) (dxAmp/fPar->GetTimeBinSize());
+ if(tbBefore > fPar->GetTimeBefore()) tbBefore = fPar->GetTimeBefore();
+
+ Int_t tb, tb_index;
+ const Int_t nChambers = AliTRDgeometry::Ncham();
+ Double_t Ymax = 0, holeYmax = 0, Zc[nChambers], Zmax[nChambers];
+ 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; x0 = 40.6;
+ for(Int_t i=0; i<steps; i++) {
+ x = xin + i*dx + dx/2;
+ ppl = new AliTRDpropagationLayer(x,dx,rho,x0,-1);
+ if((fGeom->GetPHOShole()) && (fGeomSector >= 2) && (fGeomSector <= 6)) {
+ holeYmax = x*TMath::Tan(0.5*alpha);
+ ppl->SetHole(holeYmax, holeZmax);
+ }
+ if((fGeom->GetRICHhole()) && (fGeomSector >= 12) && (fGeomSector <= 14)) {
+ holeYmax = x*TMath::Tan(0.5*alpha);
+ ppl->SetHole(holeYmax, holeZmax);
+ }
+ InsertLayer(ppl);
+ }
+
+ Ymax = fGeom->GetChamberWidth(plane)/2;
+ for(Int_t ch = 0; ch < nChambers; ch++) {
+ Zmax[ch] = fGeom->GetChamberLength(plane,ch)/2;
+ Float_t pad = fPar->GetRowPadSize(plane,ch,0);
+ Float_t row0 = fPar->GetRow0(plane,ch,0);
+ Int_t nPads = fPar->GetRowMax(plane,ch,0);
+ Zc[ch] = (pad * nPads)/2 + row0 - pad/2;
+ }
+
+ dx = fPar->GetTimeBinSize();
+ rho = 0.00295 * 0.85; x0 = 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;
+ tb_index = CookTimeBinIndex(plane, -tb-1);
+ ppl = new AliTRDpropagationLayer(x,dx,rho,x0,tb_index);
+ ppl->SetYmax(Ymax);
+ for(Int_t ch = 0; ch < nChambers; ch++) {
+ ppl->SetZmax(ch, Zc[ch], Zmax[ch]);
+ }
+ if((fGeom->GetPHOShole()) && (fGeomSector >= 2) && (fGeomSector <= 6)) {
+ holeYmax = x*TMath::Tan(0.5*alpha);
+ ppl->SetHole(holeYmax, holeZmax);
+ }
+ if((fGeom->GetRICHhole()) && (fGeomSector >= 12) && (fGeomSector <= 14)) {
+ holeYmax = x*TMath::Tan(0.5*alpha);
+ ppl->SetHole(holeYmax, holeZmax);
+ }
+ InsertLayer(ppl);
+ }
+ tb_index = CookTimeBinIndex(plane, -steps);
+ x = (x + dx/2 + xtop)/2;
+ dx = 2*(xtop-x);
+ ppl = new AliTRDpropagationLayer(x,dx,rho,x0,tb_index);
+ ppl->SetYmax(Ymax);
+ for(Int_t ch = 0; ch < nChambers; ch++) {
+ ppl->SetZmax(ch, Zc[ch], Zmax[ch]);
+ }
+ if((fGeom->GetPHOShole()) && (fGeomSector >= 2) && (fGeomSector <= 6)) {
+ holeYmax = x*TMath::Tan(0.5*alpha);
+ ppl->SetHole(holeYmax, holeZmax);
+ }
+ if((fGeom->GetRICHhole()) && (fGeomSector >= 12) && (fGeomSector <= 14)) {
+ holeYmax = x*TMath::Tan(0.5*alpha);
+ ppl->SetHole(holeYmax, holeZmax);
+ }
+ InsertLayer(ppl);
+
+ // Drift region
+ dx = fPar->GetTimeBinSize();
+ steps = (Int_t) (dxDrift/dx);
+
+ for(tb = 0; tb < steps; tb++) {
+ x = x0 - tb * dx - dx/2;
+ tb_index = CookTimeBinIndex(plane, tb);
+
+ ppl = new AliTRDpropagationLayer(x,dx,rho,x0,tb_index);
+ ppl->SetYmax(Ymax);
+ for(Int_t ch = 0; ch < nChambers; ch++) {
+ ppl->SetZmax(ch, Zc[ch], Zmax[ch]);
+ }
+ if((fGeom->GetPHOShole()) && (fGeomSector >= 2) && (fGeomSector <= 6)) {
+ holeYmax = x*TMath::Tan(0.5*alpha);
+ ppl->SetHole(holeYmax, holeZmax);
+ }
+ if((fGeom->GetRICHhole()) && (fGeomSector >= 12) && (fGeomSector <= 14)) {
+ holeYmax = x*TMath::Tan(0.5*alpha);
+ ppl->SetHole(holeYmax, holeZmax);
+ }
+ InsertLayer(ppl);
+ }
+ tb_index = CookTimeBinIndex(plane, steps);
+ x = (x - dx/2 + xbottom)/2;
+ dx = 2*(x-xbottom);
+ ppl = new AliTRDpropagationLayer(x,dx,rho,x0,tb_index);
+ ppl->SetYmax(Ymax);
+ for(Int_t ch = 0; ch < nChambers; ch++) {
+ ppl->SetZmax(ch, Zc[ch], Zmax[ch]);
+ }
+ if((fGeom->GetPHOShole()) && (fGeomSector >= 2) && (fGeomSector <= 6)) {
+ holeYmax = x*TMath::Tan(0.5*alpha);
+ ppl->SetHole(holeYmax, holeZmax);
+ }
+ if((fGeom->GetRICHhole()) && (fGeomSector >= 12) && (fGeomSector <= 14)) {
+ holeYmax = x*TMath::Tan(0.5*alpha);
+ ppl->SetHole(holeYmax, holeZmax);
+ }
+ InsertLayer(ppl);
+
+ // Pad Plane
+ xin = xtop; dx = 0.025; xout = xin + dx; rho = 1.7; x0 = 33.0;
+ ppl = new AliTRDpropagationLayer(xin+dx/2,dx,rho,x0,-1);
+ if((fGeom->GetPHOShole()) && (fGeomSector >= 2) && (fGeomSector <= 6)) {
+ holeYmax = (xin+dx/2)*TMath::Tan(0.5*alpha);
+ ppl->SetHole(holeYmax, holeZmax);
+ }
+ if((fGeom->GetRICHhole()) && (fGeomSector >= 12) && (fGeomSector <= 14)) {
+ holeYmax = (xin+dx/2)*TMath::Tan(0.5*alpha);
+ ppl->SetHole(holeYmax, holeZmax);
+ }
+ InsertLayer(ppl);
+
+ // Rohacell
+ xin = xout; xout = xtrd + (plane + 1) * dxPlane - dxSpace;
+ steps = 5; dx = (xout - xin)/steps; rho = 0.074; x0 = 40.6;
+ for(Int_t i=0; i<steps; i++) {
+ x = xin + i*dx + dx/2;
+ ppl = new AliTRDpropagationLayer(x,dx,rho,x0,-1);
+ if((fGeom->GetPHOShole()) && (fGeomSector >= 2) && (fGeomSector <= 6)) {
+ holeYmax = x*TMath::Tan(0.5*alpha);
+ ppl->SetHole(holeYmax, holeZmax);
+ }
+ if((fGeom->GetRICHhole()) && (fGeomSector >= 12) && (fGeomSector <= 14)) {
+ holeYmax = x*TMath::Tan(0.5*alpha);
+ ppl->SetHole(holeYmax, holeZmax);
+ }
+ InsertLayer(ppl);
+ }
+
+ // Space between the chambers, air
+ xin = xout; xout = xtrd + (plane + 1) * dxPlane;
+ steps = 5; dx = (xout - xin)/steps; rho = 1.29e-3; x0 = 36.66;
+ for(Int_t i=0; i<steps; i++) {
+ x = xin + i*dx + dx/2;
+ ppl = new AliTRDpropagationLayer(x,dx,rho,x0,-1);
+ if((fGeom->GetPHOShole()) && (fGeomSector >= 2) && (fGeomSector <= 6)) {
+ holeYmax = x*TMath::Tan(0.5*alpha);
+ ppl->SetHole(holeYmax, holeZmax);
+ }
+ if((fGeom->GetRICHhole()) && (fGeomSector >= 12) && (fGeomSector <= 14)) {
+ holeYmax = x*TMath::Tan(0.5*alpha);
+ ppl->SetHole(holeYmax, holeZmax);
+ }
+ 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; x0 = 36.66;
+ for(Int_t i=0; i<steps; i++) {
+ x = xin + i*dx + dx/2;
+ ppl = new AliTRDpropagationLayer(x,dx,rho,x0,-1);
+ InsertLayer(ppl);
+ }
+
+ MapTimeBinLayers();
+
+}
+
+//______________________________________________________
+
+Int_t AliTRDtracker::AliTRDtrackingSector::CookTimeBinIndex(Int_t plane, Int_t local_tb) const
+{
+ //
+ // depending on the digitization parameters calculates "global"
+ // time bin index for timebin <local_tb> in plane <plane>
+ //
+
+ Double_t dxAmp = (Double_t) fGeom->CamHght(); // Amplification region
+ Double_t dxDrift = (Double_t) fGeom->CdrHght(); // Drift region
+ Double_t dx = (Double_t) fPar->GetTimeBinSize();
+
+ Int_t tbAmp = fPar->GetTimeBefore();
+ Int_t maxAmp = (Int_t) ((dxAmp+0.000001)/dx);
+ Int_t tbDrift = fPar->GetTimeMax();
+ Int_t maxDrift = (Int_t) ((dxDrift+0.000001)/dx);
+
+ Int_t tb_per_plane = TMath::Min(tbAmp,maxAmp) + TMath::Min(tbDrift,maxDrift);
+
+ Int_t gtb = (plane+1) * tb_per_plane - local_tb - 1;
+
+ if((local_tb < 0) &&
+ (TMath::Abs(local_tb) > TMath::Min(tbAmp,maxAmp))) return -1;
+ if(local_tb >= TMath::Min(tbDrift,maxDrift)) return -1;
+
+ return gtb;
+
+
+}
+
+//______________________________________________________
+
+void AliTRDtracker::AliTRDtrackingSector::MapTimeBinLayers()
+{
+ //
+ // For all sensitive time bins sets corresponding layer index
+ // in the array fTimeBins
+ //
+
+ Int_t index;
+
+ 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) kMAX_TIME_BIN_INDEX) {
+ printf("*** AliTRDtracker::MapTimeBinLayers: \n");
+ printf(" index %d exceeds allowed maximum of %d!\n",
+ index, kMAX_TIME_BIN_INDEX-1);
+ continue;
+ }
+ fTimeBinIndex[index] = i;
+ }
+
+ 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);
+ }
+ }
+}
+
+
+//______________________________________________________
+
+
+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 = kMAX_TIME_BIN_INDEX-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) kMAX_LAYERS_PER_SECTOR)) {
+ 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::GetPropagationParameters(
+ Double_t y, Double_t z, Double_t &dx, Double_t &rho, Double_t &x0,
+ Bool_t &lookForCluster) const
+{
+ //
+ // Returns radial step <dx>, density <rho>, rad. length <x0>,
+ // and sensitivity <lookForCluster> in point <y,z>
+ //
+
+ dx = fdX;
+ rho = fRho;
+ x0 = fX0;
+ lookForCluster = kFALSE;
+
+ // check dead regions
+ if(fTimeBinIndex >= 0) {
+ for(Int_t ch = 0; ch < (Int_t) kZONES; ch++) {
+ if(TMath::Abs(z - fZc[ch]) < fZmax[ch])
+ lookForCluster = kTRUE;
+ }
+ if(TMath::Abs(y) > fYmax) lookForCluster = kFALSE;
+ if(!lookForCluster) {
+ // rho = 1.7; x0 = 33.0; // G10
+ }
+ }
+
+ // check hole
+ if(fHole && (TMath::Abs(y - fHoleYc) < fHoleYmax) &&
+ (TMath::Abs(z - fHoleZc) < fHoleZmax)) {
+ lookForCluster = kFALSE;
+ rho = fHoleRho;
+ x0 = fHoleX0;
+ }
+
+ return;
+}
+
+//______________________________________________________
+
+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) kMAX_CLUSTER_PER_TIME_BIN) {
+ 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;
+}
+
+
+
+
+
+
+
+
+
git://git.uio.no / u / mrichter / AliRoot.git / commitdiff