1 /****************************************************************************
2 * Very important, delicate and rather obscure macro. *
4 * Creates list of "trackable" tracks, *
5 * sorts tracks for matching with the ITS, *
6 * calculates efficiency, resolutions etc. *
8 * Origin: I.Belikov, CERN, Jouri.Belikov@cern.ch *
9 * with several nice improvements by: M.Ivanov, GSI, m.ivanov@gsi.de *
10 ****************************************************************************/
12 #if !defined(__CINT__) || defined(__MAKECINT__)
16 #include<TClassTable.h>
17 #include<TClonesArray.h>
27 #include <AliTPCtracker.h>
32 multievent comparison of reconstructed tracks with "exact tracks"
39 Int_t fEventN; //event number
46 enum tagprimary {kPrimaryCharged = 0x4000};
48 Int_t good_tracks(GoodTrackTPC *gt, Int_t max, Int_t firstev, Int_t eventn);
50 Int_t FindPrimaries(Int_t nparticles);
52 Int_t AliTPCComparison2(Int_t firstev=0, Int_t eventn=1) {
54 const Int_t MAX = 20000;
55 const Bool_t kOLD = kFALSE; // if tracking was done with a previous version
56 /***********************************************************************/
58 TFile *inkin = TFile::Open("rfio:galice.root");
59 // if(gAlice)delete gAlice; COMMENTED BECAUSE OF A BUG (IN COMPILED MODE)
60 gAlice = (AliRun*)inkin->Get("gAlice");
61 cout<<"AliRun object found on file "<<gAlice<<endl;
62 Float_t fifac=gAlice->Field()->Factor();
63 AliKalmanTrack::SetConvConst(100/0.299792458/0.2/fifac);
64 cout<<fifac*0.2<<" T Magnetic field is used\n";
67 delete gAlice; COMMENTED BECAUSE OF A BUG IN COMPILED MODE
70 /***********************************************************************/
71 cerr<<"Doing comparison...\n";
73 gBenchmark->Start("AliTPCComparison2");
78 cf=TFile::Open("AliTPCclusters.root");
79 if (!cf->IsOpen()) {cerr<<"Can't open AliTPCclusters.root !\n"; return 1;}
80 digp= (AliTPCParam*)cf->Get("75x40_100x60");
81 if (!digp) { cerr<<"TPC parameters have not been found !\n"; return 2; }
84 AliTPCtracker *tracker =0;
85 TObjArray tarray(MAX);
86 AliTPCtrack *iotrack=0;
89 TFile *tf=TFile::Open("AliTPCtracks.root");
93 eventptr[firstev+1]=0;
94 for (Int_t event=firstev;event<eventn; event++){
95 cout<<"================================================"<<endl;
96 cout<<"Processing event "<<event<<endl;
97 cout<<"================================================"<<endl;
100 tracker = new AliTPCtracker(digp,event);
101 tracker->LoadInnerSectors();
102 tracker->LoadOuterSectors();
107 sprintf(tname,"TreeT_TPC");
110 sprintf(tname,"TreeT_TPC_%d",event);
114 if (!tf->IsOpen()) {cerr<<"Can't open AliTPCtracks.root !\n"; return 3;}
116 tracktree=(TTree*)tf->Get(tname);
117 if (!tracktree) {cerr<<"Can't get a tree with TPC tracks !\n"; return 4;}
118 TBranch *tbranch=tracktree->GetBranch("tracks");
119 Int_t nentr0=(Int_t)tracktree->GetEntries();
121 for (i=0; i<nentr0; i++) {
122 iotrack=new AliTPCtrack;
123 tbranch->SetAddress(&iotrack);
124 tracktree->GetEvent(i);
125 if(kOLD)tracker->CookLabel(iotrack,0.1);
126 tarray.AddLast(iotrack);
128 eventptr[event+1] = nentr; //store end of the event
135 GoodTrackTPC gt[MAX];
138 ifstream in("good_tracks_tpc");
140 cerr<<"Reading good tracks...\n";
141 while (in>>gt[ngood].fEventN>>gt[ngood].lab>>gt[ngood].code>>
142 gt[ngood].px>>gt[ngood].py>>gt[ngood].pz>>
143 gt[ngood].x >>gt[ngood].y >>gt[ngood].z) {
147 cerr<<"Too many good tracks !\n";
152 if (!in.eof()) cerr<<"Read error (good_tracks_tpc) !\n";
154 cerr<<"Marking good tracks (this will take a while)...\n";
155 ngood=good_tracks(gt,45000,firstev,eventn);
156 ofstream out("good_tracks_tpc");
157 ofstream out2("good_tracks_tpc_par");
160 cout<<"File good_tracks_tpc opened\n";
161 for (Int_t ngd=0; ngd<ngood; ngd++) {
162 Float_t pt = TMath::Sqrt(gt[ngd].px*gt[ngd].px+gt[ngd].py*gt[ngd].py);
163 Float_t angle = gt[ngd].pz/pt;
164 out<<gt[ngd].fEventN<<' '<<gt[ngd].lab<<' '<<gt[ngd].code<<' '<<
165 gt[ngd].px<<' '<<gt[ngd].py<<' '<<gt[ngd].pz<<' '<<
166 gt[ngd].x <<' '<<gt[ngd].y <<' '<<gt[ngd].z <<endl;
167 out2<<gt[ngd].fEventN<<"\t"<<gt[ngd].lab<<"\t"<<gt[ngd].code<<"\t"<<
168 pt<<"\t"<<angle<<"\t"<<endl;
170 } else cerr<<"Can not open file (good_tracks_tpc) !\n";
174 cerr<<"Number of good tracks : "<<ngood<<endl;
175 if(ngood==0)return 5;
176 TH1F *hp=new TH1F("hp","PHI resolution",50,-200.,200.); hp->SetFillColor(4);
177 TH1F *hl=new TH1F("hl","LAMBDA resolution",50,-200,200);hl->SetFillColor(4);
178 TH1F *hpt=new TH1F("hpt","Relative Pt resolution",30,-10.,10.);
179 hpt->SetFillColor(2);
180 TH1F *hmpt=new TH1F("hmpt","Relative Pt resolution (pt>4GeV/c)",30,-60,60);
181 hmpt->SetFillColor(6);
183 AliTPCtrack *trk=(AliTPCtrack*)tarray.UncheckedAt(0);
185 Double_t pmin=0.1*(100/0.299792458/0.2/trk->GetConvConst());
186 Double_t pmax=6.0+pmin;
188 TH1F *hgood=new TH1F("hgood","Good tracks",30,pmin,pmax);
189 TH1F *hfound=new TH1F("hfound","Found tracks",30,pmin,pmax);
190 TH1F *hfake=new TH1F("hfake","Fake tracks",30,pmin,pmax);
191 TH1F *hg=new TH1F("hg","",30,pmin,pmax); //efficiency for good tracks
192 hg->SetLineColor(4); hg->SetLineWidth(2);
193 TH1F *hf=new TH1F("hf","Efficiency for fake tracks",30,pmin,pmax);
194 hf->SetFillColor(1); hf->SetFillStyle(3013); hf->SetLineWidth(2);
196 TH1F *he =new TH1F("he","dE/dX for pions with 0.4<p<0.5 GeV/c",50,0.,100.);
197 TH2F *hep=new TH2F("hep","dE/dX vs momentum",50,0.,2.,50,0.,250.);
198 hep->SetMarkerStyle(8);
199 hep->SetMarkerSize(0.4);
202 Int_t track_notfound[MAX], itrack_notfound=0;
203 Int_t track_fake[MAX], itrack_fake=0;
204 Int_t track_multifound[MAX], track_multifound_n[MAX], itrack_multifound=0;
206 Int_t lab=gt[ngood].lab,tlab=-1;
208 TMath::Sqrt(gt[ngood].px*gt[ngood].px + gt[ngood].py*gt[ngood].py);
210 if (ptg<pmin) continue; // Should be 1e-33 instead pmin?
213 Int_t ievent = gt[ngood].fEventN;
215 AliTPCtrack *track=0;
216 for (i=eventptr[ievent]; i<eventptr[ievent+1]; i++) {
218 track=(AliTPCtrack*)tarray.UncheckedAt(i);
219 tlab=track->GetLabel();
220 if (lab==TMath::Abs(tlab)) break;
222 if (i==eventptr[ievent+1]) {
223 track_notfound[itrack_notfound++]=lab;
229 AliTPCtrack * mitrack;
230 for (mi=eventptr[ievent]; mi<eventptr[ievent+1]; mi++) {
232 mitrack=(AliTPCtrack*)tarray.UncheckedAt(mi);
233 if (lab==TMath::Abs(mitrack->GetLabel())) micount++;
236 track_multifound[itrack_multifound]=lab;
237 track_multifound_n[itrack_multifound]=micount;
242 Double_t xk=gt[ngood].x;
243 printf("Track =%p\n",track);
244 track->PropagateTo(xk);
246 if (lab==tlab) hfound->Fill(ptg);
248 track_fake[itrack_fake++]=lab;
251 Double_t par[5]; track->GetExternalParameters(xk,par);
252 Float_t phi=TMath::ASin(par[2]) + track->GetAlpha();
253 if (phi<-TMath::Pi()) phi+=2*TMath::Pi();
254 if (phi>=TMath::Pi()) phi-=2*TMath::Pi();
255 Float_t lam=TMath::ATan(par[3]);
256 Float_t pt_1=TMath::Abs(par[4]);
258 if (TMath::Abs(gt[ngood].code)==11 && ptg>4.) {
259 hmpt->Fill((pt_1 - 1/ptg)/(1/ptg)*100.);
261 Float_t phig=TMath::ATan2(gt[ngood].py,gt[ngood].px);
262 hp->Fill((phi - phig)*1000.);
264 Float_t lamg=TMath::ATan2(gt[ngood].pz,ptg);
265 hl->Fill((lam - lamg)*1000.);
267 hpt->Fill((pt_1 - 1/ptg)/(1/ptg)*100.);
270 Float_t mom=1./(pt_1*TMath::Cos(lam));
271 Float_t dedx=track->GetdEdx();
272 hep->Fill(mom,dedx,1.);
273 if (TMath::Abs(gt[ngood].code)==211)
274 if (mom>0.4 && mom<0.5) {
280 cout<<"\nList of Not found tracks :\n";
281 for ( i = 0; i< itrack_notfound; i++){
282 cout<<track_notfound[i]<<"\t";
283 if ((i%5)==4) cout<<"\n";
285 cout<<"\nList of fake tracks :\n";
286 for ( i = 0; i< itrack_fake; i++){
287 cout<<track_fake[i]<<"\t";
288 if ((i%5)==4) cout<<"\n";
290 cout<<"\nList of multiple found tracks :\n";
291 for ( i=0; i<itrack_multifound; i++) {
292 cout<<"id. "<<track_multifound[i]
293 <<" found - "<<track_multifound_n[i]<<"times\n";
296 Stat_t ng=hgood->GetEntries(), nf=hfound->GetEntries();
297 if (ng!=0) cerr<<"\n\nIntegral efficiency is about "<<nf/ng*100.<<" %\n";
298 cout<<"Total number of found tracks ="<<nentr<<endl;
299 cout<<"Total number of \"good\" tracks ="
300 <<mingood<<" (selected for comparison: "<<ng<<')'<<endl<<endl;
303 gStyle->SetOptStat(111110);
304 gStyle->SetOptFit(1);
306 TCanvas *c1=new TCanvas("c1","",0,0,700,850);
308 TPad *p1=new TPad("p1","",0,0.3,.5,.6); p1->Draw();
309 p1->cd(); p1->SetFillColor(42); p1->SetFrameFillColor(10);
310 hp->SetFillColor(4); hp->SetXTitle("(mrad)"); hp->Fit("gaus"); c1->cd();
312 TPad *p2=new TPad("p2","",0.5,.3,1,.6); p2->Draw();
313 p2->cd(); p2->SetFillColor(42); p2->SetFrameFillColor(10);
314 hl->SetXTitle("(mrad)"); hl->Fit("gaus"); c1->cd();
316 TPad *p3=new TPad("p3","",0,0,0.5,0.3); p3->Draw();
317 p3->cd(); p3->SetFillColor(42); p3->SetFrameFillColor(10);
318 hpt->SetXTitle("(%)"); hpt->Fit("gaus"); c1->cd();
320 TPad *p4=new TPad("p4","",0.5,0,1,0.3); p4->Draw();
321 p4->cd(); p4->SetFillColor(42); p4->SetFrameFillColor(10);
322 hmpt->SetXTitle("(%)"); hmpt->Fit("gaus"); c1->cd();
324 TPad *p5=new TPad("p5","",0,0.6,1,1); p5->Draw(); p5->cd();
325 p5->SetFillColor(41); p5->SetFrameFillColor(10);
326 hfound->Sumw2(); hgood->Sumw2(); hfake->Sumw2();
327 hg->Divide(hfound,hgood,1,1.,"b");
328 hf->Divide(hfake,hgood,1,1.,"b");
330 hg->SetYTitle("Tracking efficiency");
331 hg->SetXTitle("Pt (GeV/c)");
334 TLine *line1 = new TLine(pmin,1.0,pmax,1.0); line1->SetLineStyle(4);
336 TLine *line2 = new TLine(pmin,0.9,pmax,0.9); line2->SetLineStyle(4);
340 hf->SetFillStyle(3013);
343 hf->Draw("histsame");
344 TText *text = new TText(0.461176,0.248448,"Fake tracks");
345 text->SetTextSize(0.05);
347 text = new TText(0.453919,1.11408,"Good tracks");
348 text->SetTextSize(0.05);
353 TCanvas *c2=new TCanvas("c2","",320,32,530,590);
355 TPad *p6=new TPad("p6","",0.,0.,1.,.5); p6->Draw();
356 p6->cd(); p6->SetFillColor(42); p6->SetFrameFillColor(10);
357 he->SetFillColor(2); he->SetFillStyle(3005);
358 he->SetXTitle("Arbitrary Units");
359 he->Fit("gaus"); c2->cd();
361 TPad *p7=new TPad("p7","",0.,0.5,1.,1.); p7->Draw();
362 p7->cd(); p7->SetFillColor(42); p7->SetFrameFillColor(10);
363 hep->SetXTitle("p (Gev/c)"); hep->SetYTitle("dE/dX (Arb. Units)");
364 hep->Draw(); c1->cd();
366 gBenchmark->Stop("AliTPCComparison2");
367 gBenchmark->Show("AliTPCComparison2");
374 Int_t good_tracks(GoodTrackTPC *gt, Int_t max, Int_t firstev, Int_t eventn) {
375 //eventn - number of events in file
377 TFile *file=TFile::Open("rfio:galice.root");
378 if (!file->IsOpen()) {cerr<<"Can't open galice.root !\n"; exit(4);}
379 // delete gAlice; gAlice = 0;
380 if (!(gAlice=(AliRun*)file->Get("gAlice"))) {
381 cerr<<"gAlice have not been found on galice.root !\n";
386 AliTPC *TPC=(AliTPC*)gAlice->GetDetector("TPC");
387 Int_t ver = TPC->IsVersion();
388 cerr<<"TPC version "<<ver<<" has been found !\n";
390 AliTPCParam *digp=(AliTPCParam*)file->Get("75x40_100x60");
391 if (!digp) { cerr<<"TPC parameters have not been found !\n"; exit(6); }
394 Int_t nrow_up=digp->GetNRowUp();
395 Int_t nrows=digp->GetNRowLow()+nrow_up;
396 Int_t zero=digp->GetZeroSup();
397 Int_t gap=Int_t(0.125*nrows), shift=Int_t(0.5*gap);
398 Int_t good_number=Int_t(0.4*nrows);
400 Int_t nt=0; //reset counter
401 char treeName[100]; //declare event identifier
403 for (Int_t event=firstev;event<eventn;event++){
404 Int_t np=gAlice->GetEvent(event);
405 Int_t nopr = FindPrimaries(np);
406 cout<<"function good_tracks -- event "<<event<<", Charged primaries:"<<nopr<<"\n";
408 Int_t *good=new Int_t[np];
409 for (Int_t ii=0; ii<np; ii++) good[ii]=0;
412 Int_t sectors_by_rows=0;
414 AliSimDigits da, *digits=&da;
419 TFile *cf=TFile::Open("AliTPCclusters.root");
420 if (!cf->IsOpen()){cerr<<"Can't open AliTPCclusters.root !\n";exit(5);}
421 AliTPCClustersArray *ca=new AliTPCClustersArray;
423 ca->SetClusterType("AliTPCcluster");
424 ca->ConnectTree("TreeC_TPC_0");
425 Int_t nrows=Int_t(ca->GetTree()->GetEntries());
426 for (Int_t n=0; n<nrows; n++) {
427 AliSegmentID *s=ca->LoadEntry(n);
429 digp->AdjustSectorRow(s->GetID(),sec,row);
430 AliTPCClustersRow &clrow = *ca->GetRow(sec,row);
431 Int_t ncl=clrow.GetArray()->GetEntriesFast();
433 AliTPCcluster *c=(AliTPCcluster*)clrow[ncl];
434 Int_t lab=c->GetLabel(0);
435 if (lab<0) continue; //noise cluster
437 if (sec>=digp->GetNInnerSector())
438 if (row==nrow_up-1 ) good[lab]|=0x1000;
439 if (sec>=digp->GetNInnerSector())
440 if (row==nrow_up-1-gap) good[lab]|=0x800;
443 ca->ClearRow(sec,row);
451 sprintf(treeName,"TreeD_75x40_100x60_%d",event);
452 TD=(TTree*)gDirectory->Get(treeName);
453 TD->GetBranch("Segment")->SetAddress(&digits);
454 count = new Int_t[np];
456 for (i=0; i<np; i++) count[i]=0;
457 sectors_by_rows=(Int_t)TD->GetEntries();
458 for (i=0; i<sectors_by_rows; i++) {
459 if (!TD->GetEvent(i)) continue;
461 digp->AdjustSectorRow(digits->GetID(),sec,row);
463 do { //Many thanks to J.Chudoba who noticed this
464 Int_t it=digits->CurrentRow(), ip=digits->CurrentColumn();
465 Short_t dig = digits->GetDigit(it,ip);
466 Int_t idx0=digits->GetTrackID(it,ip,0);
467 Int_t idx1=digits->GetTrackID(it,ip,1);
468 Int_t idx2=digits->GetTrackID(it,ip,2);
469 if (idx0>=0 && dig>=zero && idx0<np ) count[idx0]+=1; //background events - higher track ID's
470 if (idx1>=0 && dig>=zero && idx1<np ) count[idx1]+=1;
471 if (idx2>=0 && dig>=zero && idx2<np ) count[idx2]+=1;
472 } while (digits->Next());
473 for (Int_t j=0; j<np; j++) {
475 if (sec>=digp->GetNInnerSector())
476 if (row==nrow_up-1 ) good[j]|=0x4000;
477 if (sec>=digp->GetNInnerSector())
478 if (row==nrow_up-1-gap) good[j]|=0x1000;
480 if (sec>=digp->GetNInnerSector())
481 if (row==nrow_up-1-shift) good[j]|=0x2000;
482 if (sec>=digp->GetNInnerSector())
483 if (row==nrow_up-1-gap-shift) good[j]|=0x800;
491 delete TD; //Thanks to Mariana Bondila
495 cerr<<"Invalid TPC version !\n";
500 /** select tracks which are "good" enough **/
501 for (Int_t i=0; i<np; i++) {
502 if ((good[i]&0x5000) != 0x5000)
503 if ((good[i]&0x2800) != 0x2800) continue;
504 if ((good[i]&0x7FF ) < good_number) continue;
506 TParticle *p = (TParticle*)gAlice->Particle(i);
508 if (p->Pt()<0.100) continue;
509 if (TMath::Abs(p->Pz()/p->Pt())>0.999) continue;
510 // THIS IS GOOD IF YOU WANT SECONDARIES
511 Int_t j=p->GetFirstMother();
513 TParticle *pp = (TParticle*)gAlice->Particle(j);
514 //if (!(pp->TestBit(kPrimaryCharged))) continue; //only one decay is allowed
517 //if(!(p->TestBit(kPrimaryCharged)))continue; // only primaries
519 gt[nt].fEventN=event;
521 gt[nt].code=p->GetPdgCode();
522 gt[nt].px=0.; gt[nt].py=0.; gt[nt].pz=0.;
523 gt[nt].x=0.; gt[nt].z=0.; gt[nt].z=0.;
525 if (nt==max) {cerr<<"Too many good tracks !\n"; break;}
529 /** check if there is also information at the entrance of the TPC **/
530 TTree *TH=gAlice->TreeH(); np=(Int_t)TH->GetEntries();
532 for (Int_t i=0; i<np; i++) {
535 AliTPChit *phit = (AliTPChit*)TPC->FirstHit(-1);
536 for ( ; phit; phit=(AliTPChit*)TPC->NextHit() ) {
537 if (phit->fQ !=0. ) continue;
539 Double_t px=phit->X(), py=phit->Y(), pz=phit->Z();
541 if ((phit=(AliTPChit*)TPC->NextHit())==0) break;
542 if (phit->fQ != 0.) continue;
544 Double_t x=phit->X(), y=phit->Y(), z=phit->Z();
545 if (TMath::Sqrt(x*x+y*y)>90.) continue;
547 Int_t j, lab=phit->Track();
548 for (j=0; j<nt; j++) {if (gt[j].fEventN==event && gt[j].lab==lab) break;}
551 // (px,py,pz) - in global coordinate system, (x,y,z) - in local !
552 gt[j].px=px; gt[j].py=py; gt[j].pz=pz;
553 Float_t cs,sn; digp->AdjustCosSin(phit->fSector,cs,sn);
554 gt[j].x = x*cs + y*sn;
555 gt[j].y =-x*sn + y*cs;
562 } // /// loop on events
563 delete gAlice; gAlice=0;
566 gBenchmark->Stop("AliTPCComparison2");
567 gBenchmark->Show("AliTPCComparison2");
572 Int_t FindPrimaries(Int_t nparticles){
575 Double_t vertcut = 0.001;
576 Double_t decacut = 3.;
577 Double_t timecut = 0.;
579 TParticle * part = gAlice->Particle(0);
580 Double_t xori = part->Vx();
581 Double_t yori = part->Vy();
582 Double_t zori = part->Vz();
583 for(Int_t iprim = 0; iprim<nparticles; iprim++){ //loop on tracks
585 part = gAlice->Particle(iprim);
586 char *xxx=strstr(part->GetName(),"XXX");
589 TParticlePDG *ppdg = part->GetPDG();
590 if(TMath::Abs(ppdg->Charge())!=3)continue; // only charged (no quarks)
592 Double_t dist=TMath::Sqrt((part->Vx()-xori)*(part->Vx()-xori)+(part->Vy()-yori)*(part->Vy()-yori)+(part->Vz()-zori)*(part->Vz()-zori));
593 if(dist>vertcut)continue; // cut on the vertex
595 if(part->T()>timecut)continue;
597 Double_t ptot=TMath::Sqrt(part->Px()*part->Px()+part->Py()*part->Py()+part->Pz()*part->Pz());
598 if(ptot==(TMath::Abs(part->Pz())))continue; // no beam particles
600 Bool_t prmch = kTRUE; // candidate primary track
601 Int_t fidau=part->GetFirstDaughter(); // cut on daughters
605 lasdau=part->GetLastDaughter();
609 for(Int_t j=fidau;j<=lasdau;j++){
610 TParticle *dau=gAlice->Particle(j);
611 Double_t distd=TMath::Sqrt((dau->Vx()-xori)*(dau->Vx()-xori)+(dau->Vy()-yori)*(dau->Vy()-yori)+(dau->Vz()-zori)*(dau->Vz()-zori));
612 if(distd<decacut)prmch=kFALSE; // eliminate if the decay is near the vertex
618 part->SetBit(kPrimaryCharged);