1 /****************************************************************************
2 * Very important, delicate and rather obscure macro. *
4 * Creates list of "trackable" tracks, *
5 * calculates efficiency, resolutions etc. *
7 * Origin: I.Belikov, CERN, Jouri.Belikov@cern.ch *
8 * with several nice improvements by: M.Ivanov, GSI, m.ivanov@gsi.de *
9 ****************************************************************************/
11 #if !defined(__CINT__) || defined(__MAKECINT__)
13 #include "AliTPCtracker.h"
14 #include "AliRunLoader.h"
15 #include "AliTPCLoader.h"
28 good_tracks_tpc(GoodTrackTPC *gt, const Int_t max, const char* evfoldname);
30 extern AliRun *gAlice;
32 Int_t AliTPCComparison(Bool_t thcut=1.0) {
35 delete gAlice->GetRunLoader();
36 delete gAlice;//if everything was OK here it is already NULL
40 cerr<<"Doing comparison...\n";
42 const Int_t MAX=20000;
43 Int_t good_tracks_tpc(
44 GoodTrackTPC *gt, const Int_t max,
45 const char* evfoldname = AliConfig::fgkDefaultEventFolderName
48 gBenchmark->Start("AliTPCComparison");
50 AliRunLoader *rl = AliRunLoader::Open("galice.root","COMPARISON");
52 cerr<<"Can't start sesion !\n";
58 AliKalmanTrack::SetConvConst(
59 1000/0.299792458/rl->GetAliRun()->Field()->SolenoidField()
62 cerr<<"AliTPCComparison.C :Can't get AliRun !\n";
67 AliTPCLoader * tpcl = (AliTPCLoader *)rl->GetLoader("TPCLoader");
69 cerr<<"AliTPCComparison.C : Can not find TPCLoader\n";
74 /* Generate a list of "good" tracks */
78 ifstream in("good_tracks_tpc");
80 cerr<<"Reading good tracks...\n";
81 while (in>>gt[ngood].lab>>gt[ngood].code>>
82 gt[ngood].px>>gt[ngood].py>>gt[ngood].pz>>
83 gt[ngood].x >>gt[ngood].y >>gt[ngood].z) {
84 Double_t rin = TMath::Sqrt( gt[ngood].x*gt[ngood].x+gt[ngood].y*gt[ngood].y);
86 Double_t theta = gt[ngood].z/rin;
88 if (TMath::Abs(theta)<thcut){
92 cerr<<"Too many good tracks !\n";
98 // cerr<<"Too many good tracks !\n";
102 if (!in.eof()) cerr<<"Read error (good_tracks_tpc) !\n";
104 cerr<<"Marking good tracks (this will take a while)...\n";
105 ngood=good_tracks_tpc(gt,MAX,"COMPARISON");
106 ofstream out("good_tracks_tpc");
108 for (Int_t ngd=0; ngd<ngood; ngd++)
109 out<<gt[ngd].lab<<' '<<gt[ngd].code<<' '<<
110 gt[ngd].px<<' '<<gt[ngd].py<<' '<<gt[ngd].pz<<' '<<
111 gt[ngd].x <<' '<<gt[ngd].y <<' '<<gt[ngd].z <<endl;
112 } else cerr<<"Can not open file (good_tracks_tpc) !\n";
116 Int_t nentr=0,i=0; TObjArray tarray(MAX);
121 TTree *tracktree=tpcl->TreeT();
122 if (!tracktree) {cerr<<"Can't get a tree with TPC tracks !\n"; return 4;}
124 TBranch *tbranch=tracktree->GetBranch("tracks");
125 nentr=(Int_t)tracktree->GetEntries();
126 AliTPCtrack *iotrack=0;
127 for (i=0; i<nentr; i++) {
128 iotrack=new AliTPCtrack;
129 tbranch->SetAddress(&iotrack);
130 tracktree->GetEvent(i);
131 tarray.AddLast(iotrack);
133 tpcl->UnloadTracks();
136 TH1F *hp=new TH1F("hp","PHI resolution",50,-20.,20.); hp->SetFillColor(4);
137 TH1F *hl=new TH1F("hl","LAMBDA resolution",50,-20,20);hl->SetFillColor(4);
138 TH1F *hpt=new TH1F("hpt","Relative Pt resolution",30,-10.,10.);
139 hpt->SetFillColor(2);
140 TH1F *hmpt=new TH1F("hmpt","Relative Pt resolution (pt>4GeV/c)",30,-60,60);
141 hmpt->SetFillColor(6);
143 TH1F *hgood=new TH1F("hgood","Good tracks",30,0.1,6.1);
144 TH1F *hfound=new TH1F("hfound","Found tracks",30,0.1,6.1);
145 TH1F *hfake=new TH1F("hfake","Fake tracks",30,0.1,6.1);
146 TH1F *hg=new TH1F("hg","",30,0.1,6.1); //efficiency for good tracks
147 hg->SetLineColor(4); hg->SetLineWidth(2);
148 TH1F *hf=new TH1F("hf","Efficiency for fake tracks",30,0.1,6.1);
149 hf->SetFillColor(1); hf->SetFillStyle(3013); hf->SetLineWidth(2);
151 TH1F *he =new TH1F("he","dE/dX for pions with 0.4<p<0.5 GeV/c",50,0.,100.);
152 TH2F *hep=new TH2F("hep","dE/dX vs momentum",50,0.,2.,50,0.,400.);
153 hep->SetMarkerStyle(8);
154 hep->SetMarkerSize(0.4);
158 Int_t track_notfound[MAX], itrack_notfound=0;
159 Int_t track_fake[MAX], itrack_fake=0;
160 Int_t track_multifound[MAX], track_multifound_n[MAX], itrack_multifound=0;
163 Int_t lab=gt[ngood].lab,tlab=-1;
165 TMath::Sqrt(gt[ngood].px*gt[ngood].px + gt[ngood].py*gt[ngood].py);
167 if (ptg<1e-33) continue; // for those not crossing 0 pad row
171 AliTPCtrack *track=0;
172 for (i=0; i<nentr; i++) {
173 track=(AliTPCtrack*)tarray.UncheckedAt(i);
174 tlab=track->GetLabel();
175 if (lab==TMath::Abs(tlab)) break;
178 track_notfound[itrack_notfound++]=lab;
182 //MI change - addition
185 AliTPCtrack * mitrack;
186 for (mi=0; mi<nentr; mi++) {
187 mitrack=(AliTPCtrack*)tarray.UncheckedAt(mi);
188 if (lab==TMath::Abs(mitrack->GetLabel())) micount++;
191 track_multifound[itrack_multifound]=lab;
192 track_multifound_n[itrack_multifound]=micount;
196 Double_t xk=gt[ngood].x;
197 track->PropagateTo(xk);
199 if (lab==tlab) hfound->Fill(ptg);
201 track_fake[itrack_fake++]=lab;
205 Double_t par[5]; track->GetExternalParameters(xk,par);
206 Float_t phi=TMath::ASin(par[2]) + track->GetAlpha();
207 if (phi<-TMath::Pi()) phi+=2*TMath::Pi();
208 if (phi>=TMath::Pi()) phi-=2*TMath::Pi();
209 Float_t lam=TMath::ATan(par[3]);
210 Float_t pt_1=TMath::Abs(par[4]);
212 if (TMath::Abs(gt[ngood].code)==11 && ptg>4.) {
213 hmpt->Fill((pt_1 - 1/ptg)/(1/ptg)*100.);
215 Float_t phig=TMath::ATan2(gt[ngood].py,gt[ngood].px);
216 hp->Fill((phi - phig)*1000.);
218 Float_t lamg=TMath::ATan2(gt[ngood].pz,ptg);
219 hl->Fill((lam - lamg)*1000.);
221 hpt->Fill((pt_1 - 1/ptg)/(1/ptg)*100.);
224 Float_t mom=1./(pt_1*TMath::Cos(lam));
225 Float_t dedx=track->GetdEdx();
226 hep->Fill(mom,dedx,1.);
227 if (TMath::Abs(gt[ngood].code)==211)
228 if (mom>0.4 && mom<0.5) {
234 cout<<"\nList of Not found tracks :\n";
235 for ( i = 0; i< itrack_notfound; i++){
236 cout<<track_notfound[i]<<"\t";
237 if ((i%5)==4) cout<<"\n";
239 cout<<"\nList of fake tracks :\n";
240 for ( i = 0; i< itrack_fake; i++){
241 cout<<track_fake[i]<<"\t";
242 if ((i%5)==4) cout<<"\n";
244 cout<<"\nList of multiple found tracks :\n";
245 for ( i=0; i<itrack_multifound; i++) {
246 cout<<"id. "<<track_multifound[i]
247 <<" found - "<<track_multifound_n[i]<<"times\n";
250 Stat_t ng=hgood->GetEntries(), nf=hfound->GetEntries();
251 if (ng!=0) cerr<<"\n\nIntegral efficiency is about "<<nf/ng*100.<<" %\n";
252 cout<<"Total number of found tracks ="<<nentr<<endl;
253 cout<<"Total number of \"good\" tracks ="
254 <<mingood<<" (selected for comparison: "<<ng<<')'<<endl<<endl;
257 gStyle->SetOptStat(111110);
258 gStyle->SetOptFit(1);
260 TCanvas *c1=new TCanvas("c1","",0,0,700,850);
262 TPad *p1=new TPad("p1","",0,0.3,.5,.6); p1->Draw();
263 p1->cd(); p1->SetFillColor(42); p1->SetFrameFillColor(10);
264 hp->SetFillColor(4); hp->SetXTitle("(mrad)"); hp->Fit("gaus"); c1->cd();
266 TPad *p2=new TPad("p2","",0.5,.3,1,.6); p2->Draw();
267 p2->cd(); p2->SetFillColor(42); p2->SetFrameFillColor(10);
268 hl->SetXTitle("(mrad)"); hl->Fit("gaus"); c1->cd();
270 TPad *p3=new TPad("p3","",0,0,0.5,0.3); p3->Draw();
271 p3->cd(); p3->SetFillColor(42); p3->SetFrameFillColor(10);
272 hpt->SetXTitle("(%)"); hpt->Fit("gaus"); c1->cd();
274 TPad *p4=new TPad("p4","",0.5,0,1,0.3); p4->Draw();
275 p4->cd(); p4->SetFillColor(42); p4->SetFrameFillColor(10);
276 hmpt->SetXTitle("(%)"); hmpt->Fit("gaus"); c1->cd();
278 TPad *p5=new TPad("p5","",0,0.6,1,1); p5->Draw(); p5->cd();
279 p5->SetFillColor(41); p5->SetFrameFillColor(10);
280 hfound->Sumw2(); hgood->Sumw2(); hfake->Sumw2();
281 hg->Divide(hfound,hgood,1,1.,"b");
282 hf->Divide(hfake,hgood,1,1.,"b");
284 hg->SetYTitle("Tracking efficiency");
285 hg->SetXTitle("Pt (GeV/c)");
288 TLine *line1 = new TLine(0.1,1.0,6.1,1.0); line1->SetLineStyle(4);
290 TLine *line2 = new TLine(0.1,0.9,6.1,0.9); line2->SetLineStyle(4);
294 hf->SetFillStyle(3013);
297 hf->Draw("histsame");
298 TText *text = new TText(0.461176,0.248448,"Fake tracks");
299 text->SetTextSize(0.05);
301 text = new TText(0.453919,1.11408,"Good tracks");
302 text->SetTextSize(0.05);
307 TCanvas *c2=new TCanvas("c2","",320,32,530,590);
309 TPad *p6=new TPad("p6","",0.,0.,1.,.5); p6->Draw();
310 p6->cd(); p6->SetFillColor(42); p6->SetFrameFillColor(10);
311 he->SetFillColor(2); he->SetFillStyle(3005);
312 he->SetXTitle("Arbitrary Units");
313 he->Fit("gaus"); c2->cd();
315 TPad *p7=new TPad("p7","",0.,0.5,1.,1.); p7->Draw();
316 p7->cd(); p7->SetFillColor(42); p7->SetFrameFillColor(10);
317 hep->SetXTitle("p (Gev/c)"); hep->SetYTitle("dE/dX (Arb. Units)");
318 hep->Draw(); c1->cd();
320 gBenchmark->Stop("AliTPCComparison");
321 gBenchmark->Show("AliTPCComparison");
329 good_tracks_tpc(GoodTrackTPC *gt, const Int_t max, const char* evfoldname) {
332 AliRunLoader *rl = AliRunLoader::GetRunLoader(evfoldname);
334 ::Fatal("AliTPCComparison.C::good_tracks_tpc",
335 "Can not find Run Loader in Folder Named %s",
338 AliTPCLoader *tpcl = (AliTPCLoader *)rl->GetLoader("TPCLoader");
340 cerr<<"AliTPCHits2Digits.C : Can not find TPCLoader\n";
347 AliTPC *TPC=(AliTPC*)rl->GetAliRun()->GetDetector("TPC");
348 Int_t ver = TPC->IsVersion();
349 cerr<<"TPC version "<<ver<<" has been found !\n";
352 AliTPCParamSR *digp=(AliTPCParamSR*)gDirectory->Get("75x40_100x60_150x60");
353 if (!digp) { cerr<<"TPC parameters have not been found !\n"; exit(6); }
358 Int_t np = rl->GetHeader()->GetNtrack();
361 Int_t nrow_up=digp->GetNRowUp();
362 Int_t nrows=digp->GetNRowLow()+nrow_up;
363 Int_t zero=digp->GetZeroSup();
364 Int_t gap=Int_t(0.125*nrows), shift=Int_t(0.5*gap);
365 Int_t good_number=Int_t(0.4*nrows);
367 Int_t *good=new Int_t[np];
369 for (i=0; i<np; i++) good[i]=0;
375 tpcl->LoadRecPoints();
376 AliTPCClustersArray *pca=new AliTPCClustersArray, &ca=*pca;
378 ca.SetClusterType("AliTPCcluster");
379 ca.ConnectTree(tpcl->TreeR());
380 Int_t nrows=Int_t(ca.GetTree()->GetEntries());
381 for (Int_t n=0; n<nrows; n++) {
382 AliSegmentID *s=ca.LoadEntry(n);
384 digp->AdjustSectorRow(s->GetID(),sec,row);
385 AliTPCClustersRow &clrow = *ca.GetRow(sec,row);
386 Int_t ncl=clrow.GetArray()->GetEntriesFast();
388 AliTPCcluster *c=(AliTPCcluster*)clrow[ncl];
389 Int_t lab=c->GetLabel(0);
390 if (lab<0) continue; //noise cluster
393 if (sec>=digp->GetNInnerSector())
394 if (row==nrow_up-1) good[lab]|=0x4000;
395 if (sec>=digp->GetNInnerSector())
396 if (row==nrow_up-1-gap) good[lab]|=0x1000;
398 if (sec>=digp->GetNInnerSector())
399 if (row==nrow_up-1-shift) good[lab]|=0x2000;
400 if (sec>=digp->GetNInnerSector())
401 if (row==nrow_up-1-gap-shift) good[lab]|=0x800;
405 ca.ClearRow(sec,row);
408 tpcl->UnloadRecPoints();
414 TTree *TD=tpcl->TreeD();
416 AliSimDigits da, *digits=&da;
417 TD->GetBranch("Segment")->SetAddress(&digits);
419 Int_t *count = new Int_t[np];
421 for (i=0; i<np; i++) count[i]=0;
423 Int_t sectors_by_rows=(Int_t)TD->GetEntries();
424 for (i=0; i<sectors_by_rows; i++) {
425 if (!TD->GetEvent(i)) continue;
427 digp->AdjustSectorRow(digits->GetID(),sec,row);
428 cerr<<sec<<' '<<row<<" \r";
430 do { //Many thanks to J.Chudoba who noticed this
431 Int_t it=digits->CurrentRow(), ip=digits->CurrentColumn();
432 Short_t dig = digits->GetDigit(it,ip);
433 Int_t idx0=digits->GetTrackID(it,ip,0);
434 Int_t idx1=digits->GetTrackID(it,ip,1);
435 Int_t idx2=digits->GetTrackID(it,ip,2);
436 if (idx0>=0 && dig>=zero && idx0<np) count[idx0]+=1;
437 if (idx1>=0 && dig>=zero && idx1<np) count[idx1]+=1;
438 if (idx2>=0 && dig>=zero && idx2<np) count[idx2]+=1;
439 } while (digits->Next());
440 for (Int_t j=0; j<np; j++) {
442 if (sec>=digp->GetNInnerSector())
443 if (row==nrow_up-1 ) good[j]|=0x4000;
444 if (sec>=digp->GetNInnerSector())
445 if (row==nrow_up-1-gap) good[j]|=0x1000;
447 if (sec>=digp->GetNInnerSector())
448 if (row==nrow_up-1-shift) good[j]|=0x2000;
449 if (sec>=digp->GetNInnerSector())
450 if (row==nrow_up-1-gap-shift) good[j]|=0x800;
457 tpcl->UnloadDigits();
461 cerr<<"Invalid TPC version !\n";
466 rl->LoadKinematics();
467 AliStack* stack = rl->Stack();
468 /** select tracks which are "good" enough **/
469 for (i=0; i<np; i++) {
470 if ((good[i]&0x5000) != 0x5000)
471 if ((good[i]&0x2800) != 0x2800) continue;
472 if ((good[i]&0x7FF ) < good_number) continue;
474 TParticle *p = (TParticle*)stack->Particle(i);
477 cerr<<"Can not get particle "<<i<<endl;
480 if (p->Pt()<0.100) continue;
481 if (TMath::Abs(p->Pz()/p->Pt())>0.999) continue;
483 Int_t j=p->GetFirstMother();
485 TParticle *pp = (TParticle*)stack->Particle(j);
488 cerr<<"Can not get particle "<<j<<endl;
491 if (pp->GetFirstMother()>=0) continue;//only one decay is allowed
492 /* for cascade hyperons only
493 Int_t jj=pp->GetFirstMother();
495 TParticle *ppp = (TParticle*)stack->Particle(jj);
496 if (ppp->GetFirstMother()>=0) continue;//two decays are allowed
502 gt[nt].code=p->GetPdgCode();
503 gt[nt].px=0.; gt[nt].py=0.; gt[nt].pz=0.;
504 gt[nt].x=0.; gt[nt].y=0.; gt[nt].z=0.;
506 if (nt==max) {cerr<<"Too many good tracks !\n"; break;}
509 rl->UnloadKinematics();
511 /** check if there is also information at the entrance of the TPC **/
514 TTree *TH=tpcl->TreeH();
515 TPC->SetTreeAddress();
516 np=(Int_t)TH->GetEntries();
517 for (i=0; i<np; i++) {
520 AliTPChit *phit = (AliTPChit*)TPC->FirstHit(-1);
521 for ( ; phit; phit=(AliTPChit*)TPC->NextHit() ) {
522 if (phit->fQ !=0. ) continue;
524 Double_t px=phit->X(), py=phit->Y(), pz=phit->Z();
526 if ((phit=(AliTPChit*)TPC->NextHit())==0) break;
527 if (phit->fQ != 0.) continue;
529 Double_t x=phit->X(), y=phit->Y(), z=phit->Z();
530 if (TMath::Sqrt(x*x+y*y)>90.) continue;
532 Int_t j, lab=phit->Track();
533 for (j=0; j<nt; j++) {if (gt[j].lab==lab) break;}
536 // (px,py,pz) - in global coordinate system, (x,y,z) - in local !
537 gt[j].px=px; gt[j].py=py; gt[j].pz=pz;
538 Float_t cs,sn; digp->AdjustCosSin(phit->fSector,cs,sn);
539 gt[j].x = x*cs + y*sn;
540 gt[j].y =-x*sn + y*cs;
551 gBenchmark->Stop("AliTPCComparison");
552 gBenchmark->Show("AliTPCComparison");