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[u/mrichter/AliRoot.git] / TPC / AliTPCComparison.C
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7f6ddf58 1/****************************************************************************
2 * Very important, delicate and rather obscure macro. *
3 * *
4 * Creates list of "trackable" tracks, *
7f6ddf58 5 * calculates efficiency, resolutions etc. *
bf018fe4 6 * There is a possibility to run this macro over several events. *
7f6ddf58 7 * *
024a7fe9 8 * Origin: I.Belikov, CERN, Jouri.Belikov@cern.ch *
7f6ddf58 9 * with several nice improvements by: M.Ivanov, GSI, m.ivanov@gsi.de *
10 ****************************************************************************/
11
c630aafd 12#if !defined(__CINT__) || defined(__MAKECINT__)
5102bab6 13 #include <TMath.h>
14 #include <TError.h>
15 #include <Riostream.h>
16 #include <TH1F.h>
17 #include <TH2F.h>
18 #include <TTree.h>
19 #include <TParticle.h>
5102bab6 20 #include <TCanvas.h>
21 #include <TLine.h>
22 #include <TText.h>
23 #include <TBenchmark.h>
24 #include <TStyle.h>
8b462fd8 25 #include <TFile.h>
bf018fe4 26 #include <TROOT.h>
5102bab6 27
28 #include "AliStack.h"
29 #include "AliHeader.h"
30 #include "AliTrackReference.h"
88cb7938 31 #include "AliRunLoader.h"
c630aafd 32 #include "AliRun.h"
5102bab6 33 #include "AliESD.h"
34
35 #include "AliSimDigits.h"
36 #include "AliTPC.h"
37 #include "AliTPCParamSR.h"
38 #include "AliTPCClustersArray.h"
39 #include "AliTPCClustersRow.h"
bf018fe4 40 #include "AliTPCcluster.h"
5102bab6 41 #include "AliTPCLoader.h"
be9c5115 42#endif
43
4fa1e629 44Int_t GoodTracksTPC(const Char_t *dir=".");
88cb7938 45
c630aafd 46extern AliRun *gAlice;
5102bab6 47extern TBenchmark *gBenchmark;
bf018fe4 48extern TROOT *gROOT;
fbb58996 49
4fa1e629 50static Int_t allgood=0;
51static Int_t allselected=0;
52static Int_t allfound=0;
53
54Int_t AliTPCComparison
55(Float_t ptcutl=0.2, Float_t ptcuth=10., const Char_t *dir=".") {
5102bab6 56 gBenchmark->Start("AliTPCComparison");
57
58 ::Info("AliTPCComparison.C","Doing comparison...");
c630aafd 59
88cb7938 60
bf018fe4 61
62 TH1F *hp=(TH1F*)gROOT->FindObject("hp");
63 if (!hp) hp=new TH1F("hp","PHI resolution",50,-20.,20.);
64 hp->SetFillColor(4);
65
66 TH1F *hl=(TH1F*)gROOT->FindObject("hl");
67 if (!hl) hl=new TH1F("hl","LAMBDA resolution",50,-20,20);
68 hl->SetFillColor(4);
69
70 TH1F *hpt=(TH1F*)gROOT->FindObject("hpt");
71 if (!hpt) hpt=new TH1F("hpt","Relative Pt resolution",30,-10.,10.);
72 hpt->SetFillColor(2);
73
74 TH1F *hmpt=(TH1F*)gROOT->FindObject("hmpt");
75 if (!hmpt)
76 hmpt=new TH1F("hmpt","Relative Pt resolution (pt>4GeV/c)",30,-60,60);
cc80f89e 77 hmpt->SetFillColor(6);
8c555625 78
bf018fe4 79
80
81 TH1F *hgood=(TH1F*)gROOT->FindObject("hgood");
82 if (!hgood) hgood=new TH1F("hgood","Good tracks",30,0.2,6.1);
83
84 TH1F *hfound=(TH1F*)gROOT->FindObject("hfound");
85 if (!hfound) hfound=new TH1F("hfound","Found tracks",30,0.2,6.1);
86
87 TH1F *hfake=(TH1F*)gROOT->FindObject("hfake");
88 if (!hfake) hfake=new TH1F("hfake","Fake tracks",30,0.2,6.1);
89
90 TH1F *hg=(TH1F*)gROOT->FindObject("hg");
91 if (!hg) hg=new TH1F("hg","Efficiency for good tracks",30,0.2,6.1);
8c555625 92 hg->SetLineColor(4); hg->SetLineWidth(2);
bf018fe4 93
94 TH1F *hf=(TH1F*)gROOT->FindObject("hf");
95 if (!hf) hf=new TH1F("hf","Efficiency for fake tracks",30,0.2,6.1);
8c555625 96 hf->SetFillColor(1); hf->SetFillStyle(3013); hf->SetLineWidth(2);
97
bf018fe4 98 TH1F *he=(TH1F*)gROOT->FindObject("he");
99 if (!he)
100 he =new TH1F("he","dE/dX for pions with 0.4<p<0.5 GeV/c",50,0.,100.);
101
102 TH2F *hep=(TH2F*)gROOT->FindObject("hep");
103 if (!hep) hep=new TH2F("hep","dE/dX vs momentum",50,0.,2.,50,0.,400.);
be9c5115 104 hep->SetMarkerStyle(8);
105 hep->SetMarkerSize(0.4);
8c555625 106
4fa1e629 107
108 Char_t fname[100];
109 sprintf(fname,"%s/GoodTracksTPC.root",dir);
110
111 TFile *refFile=TFile::Open(fname,"old");
112 if (!refFile || !refFile->IsOpen()) {
113 ::Info("AliTPCComparison.C","Marking good tracks (will take a while)...");
114 if (GoodTracksTPC(dir)) {
115 ::Error("AliTPCComparison.C","Can't generate the reference file !");
116 return 1;
117 }
118 }
119 refFile=TFile::Open(fname,"old");
120 if (!refFile || !refFile->IsOpen()) {
121 ::Error("AliTPCComparison.C","Can't open the reference file !");
122 return 2;
123 }
124
125 TTree *tpcTree=(TTree*)refFile->Get("tpcTree");
126 if (!tpcTree) {
127 ::Error("AliTPCComparison.C","Can't get the reference tree !");
128 return 3;
129 }
130 TBranch *branch=tpcTree->GetBranch("TPC");
131 if (!branch) {
132 ::Error("AliTPCComparison.C","Can't get the TPC branch !");
133 return 4;
134 }
135 TClonesArray dummy("AliTrackReference",1000), *refs=&dummy;
136 branch->SetAddress(&refs);
137
138
139 sprintf(fname,"%s/AliESDs.root",dir);
140 TFile *ef=TFile::Open(fname);
141 if ((!ef)||(!ef->IsOpen())) {
142 sprintf(fname,"%s/AliESDtpc.root",dir);
143 ef=TFile::Open(fname);
144 if ((!ef)||(!ef->IsOpen())) {
145 ::Error("AliTPCComparison.C","Can't open AliESDtpc.root !");
146 return 5;
147 }
148 }
8b462fd8 149 AliESD* event = new AliESD;
150 TTree* esdTree = (TTree*) ef->Get("esdTree");
151 if (!esdTree) {
152 ::Error("AliTPCComparison.C", "no ESD tree found");
153 return 6;
154 }
155 esdTree->SetBranchAddress("ESD", &event);
4fa1e629 156
157
158 //******* Loop over events *********
159 Int_t e=0;
8b462fd8 160 while (esdTree->GetEvent(e)) {
4fa1e629 161 cout<<endl<<endl<<"********* Processing event number: "<<e<<"*******\n";
162
4fa1e629 163 Int_t nentr=event->GetNumberOfTracks();
164 allfound+=nentr;
165
166 if (tpcTree->GetEvent(e++)==0) {
167 cerr<<"No reconstructable tracks !\n";
168 continue;
169 }
170
171 Int_t ngood=refs->GetEntriesFast();
172 allgood+=ngood;
173
174 const Int_t MAX=15000;
175 //MI change
176 Int_t track_notfound[MAX], itrack_notfound=0;
177 Int_t track_fake[MAX], itrack_fake=0;
178 Int_t track_multifound[MAX],track_multifound_n[MAX],itrack_multifound=0;
179
180 Int_t i;
181 for (Int_t k=0; k<ngood; k++) {
182 AliTrackReference *ref=(AliTrackReference*)refs->UncheckedAt(k);
183 Int_t lab=ref->Label(), tlab=-1;
184 Float_t ptg=TMath::Sqrt(ref->Px()*ref->Px() + ref->Py()*ref->Py());
185
186 if (ptg<1e-33) continue; // for those not crossing 0 pad row
187
188 if (ptg<ptcutl) continue;
189 if (ptg>ptcuth) continue;
190
191 allselected++;
192
193 hgood->Fill(ptg);
194
195 AliESDtrack *track=0;
196 for (i=0; i<nentr; i++) {
bf018fe4 197 track=event->GetTrack(i);
162085b7 198 tlab=track->GetTPCLabel();
cc80f89e 199 if (lab==TMath::Abs(tlab)) break;
4fa1e629 200 }
201 if (i==nentr) {
202 track_notfound[itrack_notfound++]=lab;
203 continue;
204 }
205
206 //MI change - addition
207 Int_t micount=0;
208 Int_t mi;
209 AliESDtrack * mitrack;
210 for (mi=0; mi<nentr; mi++) {
211 mitrack=event->GetTrack(mi);
212 if (lab==TMath::Abs(mitrack->GetTPCLabel())) micount++;
213 }
214 if (micount>1) {
215 track_multifound[itrack_multifound]=lab;
216 track_multifound_n[itrack_multifound]=micount;
217 itrack_multifound++;
218 }
219 if ((track->GetStatus()&AliESDtrack::kTPCrefit)==0) continue;
220 if (lab==tlab) hfound->Fill(ptg);
221 else {
222 track_fake[itrack_fake++]=lab;
223 hfake->Fill(ptg);
224 }
cf98c13f 225
4fa1e629 226 Double_t pxpypz[3]; track->GetInnerPxPyPz(pxpypz);
227 Float_t phi=TMath::ATan2(pxpypz[1],pxpypz[0]);
228 if (phi<-TMath::Pi()) phi+=2*TMath::Pi();
229 if (phi>=TMath::Pi()) phi-=2*TMath::Pi();
230 Double_t pt=TMath::Sqrt(pxpypz[0]*pxpypz[0]+pxpypz[1]*pxpypz[1]);
231 Float_t lam=TMath::ATan2(pxpypz[2],pt);
232 Float_t pt_1=1/pt;
233
234 Int_t pdg=(Int_t)ref->GetLength(); //this is particle's PDG !
235
236 if (TMath::Abs(pdg)==11 && ptg>4.) {//high momentum electrons
237 hmpt->Fill((pt_1 - 1/ptg)/(1/ptg)*100.);
238 } else {
239 Float_t phig=TMath::ATan2(ref->Py(),ref->Px());
240 hp->Fill((phi - phig)*1000.);
241
242 Float_t lamg=TMath::ATan2(ref->Pz(),ptg);
243 hl->Fill((lam - lamg)*1000.);
244
245 hpt->Fill((pt_1 - 1/ptg)/(1/ptg)*100.);
246 }
247
248 Float_t mom=pt/TMath::Cos(lam);
249 Float_t dedx=track->GetTPCsignal();
250 hep->Fill(mom,dedx,1.);
251 if (TMath::Abs(pdg)==211) //pions
252 if (mom>0.4 && mom<0.5) {
253 he->Fill(dedx,1.);
254 }
cf98c13f 255 }
4fa1e629 256
257 cout<<"\nList of Not found tracks :\n";
258 for ( i = 0; i< itrack_notfound; i++){
259 cout<<track_notfound[i]<<"\t";
260 if ((i%5)==4) cout<<"\n";
cf98c13f 261 }
4fa1e629 262 cout<<"\nList of fake tracks :\n";
263 for ( i = 0; i< itrack_fake; i++){
264 cout<<track_fake[i]<<"\t";
265 if ((i%5)==4) cout<<"\n";
cf98c13f 266 }
4fa1e629 267 cout<<"\nList of multiple found tracks :\n";
268 for ( i=0; i<itrack_multifound; i++) {
269 cout<<"id. "<<track_multifound[i]
270 <<" found - "<<track_multifound_n[i]<<"times\n";
cc80f89e 271 }
73042f01 272
4fa1e629 273 cout<<"Number of found tracks ="<<nentr<<endl;
274 cout<<"Number of \"good\" tracks ="<<ngood<<endl;
73042f01 275
4fa1e629 276 refs->Clear();
4fa1e629 277 }// ***** End of the loop over events
cc80f89e 278
8b462fd8 279 delete event;
4fa1e629 280 ef->Close();
8c555625 281
4fa1e629 282 delete tpcTree;
283 refFile->Close();
7f6ddf58 284
4fa1e629 285 Stat_t ng=hgood->GetEntries(), nf=hfound->GetEntries();
286 if (ng!=0) cout<<"\n\nIntegral efficiency is about "<<nf/ng*100.<<" %\n";
287 cout<<"Total number selected of \"good\" tracks ="<<allselected<<endl<<endl;
288 cout<<"Total number of found tracks ="<<allfound<<endl;
289 cout<<"Total number of \"good\" tracks ="<<allgood<<endl;
290 cout<<endl;
7f6ddf58 291
8c555625 292 gStyle->SetOptStat(111110);
293 gStyle->SetOptFit(1);
294
295 TCanvas *c1=new TCanvas("c1","",0,0,700,850);
296
2d343a94 297 Int_t minc=33;
298
8c555625 299 TPad *p1=new TPad("p1","",0,0.3,.5,.6); p1->Draw();
300 p1->cd(); p1->SetFillColor(42); p1->SetFrameFillColor(10);
2d343a94 301 hp->SetFillColor(4); hp->SetXTitle("(mrad)");
302 if (hp->GetEntries()<minc) hp->Draw(); else hp->Fit("gaus"); c1->cd();
8c555625 303
304 TPad *p2=new TPad("p2","",0.5,.3,1,.6); p2->Draw();
305 p2->cd(); p2->SetFillColor(42); p2->SetFrameFillColor(10);
2d343a94 306 hl->SetXTitle("(mrad)");
307 if (hl->GetEntries()<minc) hl->Draw(); else hl->Fit("gaus"); c1->cd();
8c555625 308
309 TPad *p3=new TPad("p3","",0,0,0.5,0.3); p3->Draw();
310 p3->cd(); p3->SetFillColor(42); p3->SetFrameFillColor(10);
2d343a94 311 hpt->SetXTitle("(%)");
312 if (hpt->GetEntries()<minc) hpt->Draw(); else hpt->Fit("gaus"); c1->cd();
8c555625 313
314 TPad *p4=new TPad("p4","",0.5,0,1,0.3); p4->Draw();
315 p4->cd(); p4->SetFillColor(42); p4->SetFrameFillColor(10);
2d343a94 316 hmpt->SetXTitle("(%)");
317 if (hmpt->GetEntries()<minc) hmpt->Draw(); else hmpt->Fit("gaus"); c1->cd();
8c555625 318
319 TPad *p5=new TPad("p5","",0,0.6,1,1); p5->Draw(); p5->cd();
3c0f9266 320 p5->SetFillColor(41); p5->SetFrameFillColor(10);
8c555625 321 hfound->Sumw2(); hgood->Sumw2(); hfake->Sumw2();
322 hg->Divide(hfound,hgood,1,1.,"b");
323 hf->Divide(hfake,hgood,1,1.,"b");
324 hg->SetMaximum(1.4);
325 hg->SetYTitle("Tracking efficiency");
326 hg->SetXTitle("Pt (GeV/c)");
327 hg->Draw();
328
7f6ddf58 329 TLine *line1 = new TLine(0.1,1.0,6.1,1.0); line1->SetLineStyle(4);
8c555625 330 line1->Draw("same");
7f6ddf58 331 TLine *line2 = new TLine(0.1,0.9,6.1,0.9); line2->SetLineStyle(4);
8c555625 332 line2->Draw("same");
333
334 hf->SetFillColor(1);
335 hf->SetFillStyle(3013);
336 hf->SetLineColor(2);
337 hf->SetLineWidth(2);
338 hf->Draw("histsame");
339 TText *text = new TText(0.461176,0.248448,"Fake tracks");
340 text->SetTextSize(0.05);
341 text->Draw();
342 text = new TText(0.453919,1.11408,"Good tracks");
343 text->SetTextSize(0.05);
344 text->Draw();
3c0f9266 345
346
347
348 TCanvas *c2=new TCanvas("c2","",320,32,530,590);
349
350 TPad *p6=new TPad("p6","",0.,0.,1.,.5); p6->Draw();
351 p6->cd(); p6->SetFillColor(42); p6->SetFrameFillColor(10);
352 he->SetFillColor(2); he->SetFillStyle(3005);
353 he->SetXTitle("Arbitrary Units");
2d343a94 354 if (he->GetEntries()<minc) he->Draw(); else he->Fit("gaus"); c2->cd();
3c0f9266 355
356 TPad *p7=new TPad("p7","",0.,0.5,1.,1.); p7->Draw();
357 p7->cd(); p7->SetFillColor(42); p7->SetFrameFillColor(10);
358 hep->SetXTitle("p (Gev/c)"); hep->SetYTitle("dE/dX (Arb. Units)");
359 hep->Draw(); c1->cd();
360
2d343a94 361 TFile fc("AliTPCComparison.root","RECREATE");
362 c1->Write();
363 c2->Write();
364 fc.Close();
365
4fa1e629 366 gBenchmark->Stop("AliTPCComparison");
367 gBenchmark->Show("AliTPCComparison");
368
73042f01 369 return 0;
cc80f89e 370}
3c0f9266 371
cc80f89e 372
4fa1e629 373Int_t GoodTracksTPC(const Char_t *dir) {
374 if (gAlice) {
375 delete gAlice->GetRunLoader();
376 delete gAlice;//if everything was OK here it is already NULL
377 gAlice = 0x0;
378 }
379
380 Char_t fname[100];
381 sprintf(fname,"%s/galice.root",dir);
cc80f89e 382
4fa1e629 383 AliRunLoader *rl = AliRunLoader::Open(fname,"COMPARISON");
384 if (!rl) {
385 ::Error("GoodTracksTPC","Can't start session !");
386 return 1;
c630aafd 387 }
4fa1e629 388
389 rl->LoadgAlice();
390 rl->LoadHeader();
391 rl->LoadKinematics();
392 rl->LoadTrackRefs();
393
c630aafd 394 AliTPCLoader *tpcl = (AliTPCLoader *)rl->GetLoader("TPCLoader");
395 if (tpcl == 0x0) {
4fa1e629 396 ::Error("GoodTracksTPC","Can not find TPCLoader !");
397 delete rl;
398 return 2;
c630aafd 399 }
4fa1e629 400
88cb7938 401 AliTPC *TPC=(AliTPC*)rl->GetAliRun()->GetDetector("TPC");
73042f01 402 Int_t ver = TPC->IsVersion();
4fa1e629 403 cout<<"TPC version "<<ver<<" has been found !\n";
404 if (ver==1) tpcl->LoadRecPoints();
405 else if (ver==2) tpcl->LoadDigits();
406 else {
407 ::Error("GoodTracksTPC","Wrong TPC version !");
408 delete rl;
409 return 3;
410 }
73042f01 411
88cb7938 412 rl->CdGAFile();
413 AliTPCParamSR *digp=(AliTPCParamSR*)gDirectory->Get("75x40_100x60_150x60");
5102bab6 414 if (!digp) {
4fa1e629 415 ::Error("AliTPCHits2Digits.C","TPC parameters have not been found !");
416 delete rl;
417 return 4;
5102bab6 418 }
73042f01 419 TPC->SetParam(digp);
420
421 Int_t nrow_up=digp->GetNRowUp();
422 Int_t nrows=digp->GetNRowLow()+nrow_up;
423 Int_t zero=digp->GetZeroSup();
7f6ddf58 424 Int_t gap=Int_t(0.125*nrows), shift=Int_t(0.5*gap);
cc80f89e 425 Int_t good_number=Int_t(0.4*nrows);
426
4fa1e629 427 Int_t nev=rl->GetNumberOfEvents();
428 ::Info("GoodTracksTPC","Number of events : %d\n",nev);
429
430
431 sprintf(fname,"%s/GoodTracksTPC.root",dir);
432 TFile *file=TFile::Open(fname,"recreate");
433
434 TClonesArray dummy("AliTrackReference",1000), *refs=&dummy;
435 TTree tpcTree("tpcTree","Tree with info about the reconstructable TPC tracks");
436 tpcTree.Branch("TPC",&refs);
437
438 //******** Loop over generated events
439 for (Int_t e=0; e<nev; e++) {
440 Int_t nt=0;
441 refs->Clear();
442
443 Int_t i;
444
445 rl->GetEvent(e); file->cd();
446
447 Int_t np = rl->GetHeader()->GetNtrack();
448 cout<<"Event "<<e<<" Number of particles: "<<np<<endl;
449
450 //******** Fill the "good" masks
451 Int_t *good=new Int_t[np]; for (i=0; i<np; i++) good[i]=0;
452 switch (ver) {
453 case 1:
454 {
455 AliTPCClustersArray *pca=new AliTPCClustersArray, &ca=*pca;
456 ca.Setup(digp);
457 ca.SetClusterType("AliTPCcluster");
458 ca.ConnectTree(tpcl->TreeR());
459 Int_t nrows=Int_t(ca.GetTree()->GetEntries());
460 for (Int_t n=0; n<nrows; n++) {
7f6ddf58 461 AliSegmentID *s=ca.LoadEntry(n);
462 Int_t sec,row;
463 digp->AdjustSectorRow(s->GetID(),sec,row);
464 AliTPCClustersRow &clrow = *ca.GetRow(sec,row);
465 Int_t ncl=clrow.GetArray()->GetEntriesFast();
466 while (ncl--) {
467 AliTPCcluster *c=(AliTPCcluster*)clrow[ncl];
468 Int_t lab=c->GetLabel(0);
469 if (lab<0) continue; //noise cluster
470 lab=TMath::Abs(lab);
471
472 if (sec>=digp->GetNInnerSector())
473 if (row==nrow_up-1) good[lab]|=0x4000;
474 if (sec>=digp->GetNInnerSector())
475 if (row==nrow_up-1-gap) good[lab]|=0x1000;
476
477 if (sec>=digp->GetNInnerSector())
478 if (row==nrow_up-1-shift) good[lab]|=0x2000;
479 if (sec>=digp->GetNInnerSector())
480 if (row==nrow_up-1-gap-shift) good[lab]|=0x800;
481
482 good[lab]++;
483 }
484 ca.ClearRow(sec,row);
4fa1e629 485 }
486 delete pca;
487 }
488 break;
489 case 2:
490 {
491 TTree *TD=tpcl->TreeD();
88cb7938 492
4fa1e629 493 AliSimDigits da, *digits=&da;
494 TD->GetBranch("Segment")->SetAddress(&digits);
7f6ddf58 495
4fa1e629 496 Int_t *count = new Int_t[np];
497 Int_t i;
498 for (i=0; i<np; i++) count[i]=0;
7f6ddf58 499
4fa1e629 500 Int_t sectors_by_rows=(Int_t)TD->GetEntries();
501 for (i=0; i<sectors_by_rows; i++) {
7f6ddf58 502 if (!TD->GetEvent(i)) continue;
503 Int_t sec,row;
504 digp->AdjustSectorRow(digits->GetID(),sec,row);
4fa1e629 505 //cerr<<sec<<' '<<row<<'\r';
7f6ddf58 506 digits->First();
507 do { //Many thanks to J.Chudoba who noticed this
508 Int_t it=digits->CurrentRow(), ip=digits->CurrentColumn();
509 Short_t dig = digits->GetDigit(it,ip);
510 Int_t idx0=digits->GetTrackID(it,ip,0);
511 Int_t idx1=digits->GetTrackID(it,ip,1);
512 Int_t idx2=digits->GetTrackID(it,ip,2);
8ded1b7a 513 if (idx0>=0 && dig>=zero && idx0<np) count[idx0]+=1;
514 if (idx1>=0 && dig>=zero && idx1<np) count[idx1]+=1;
515 if (idx2>=0 && dig>=zero && idx2<np) count[idx2]+=1;
afc42102 516 } while (digits->Next());
7f6ddf58 517 for (Int_t j=0; j<np; j++) {
518 if (count[j]>1) {
519 if (sec>=digp->GetNInnerSector())
520 if (row==nrow_up-1 ) good[j]|=0x4000;
521 if (sec>=digp->GetNInnerSector())
522 if (row==nrow_up-1-gap) good[j]|=0x1000;
523
524 if (sec>=digp->GetNInnerSector())
525 if (row==nrow_up-1-shift) good[j]|=0x2000;
526 if (sec>=digp->GetNInnerSector())
527 if (row==nrow_up-1-gap-shift) good[j]|=0x800;
528 good[j]++;
529 }
530 count[j]=0;
531 }
4fa1e629 532 }
533 delete[] count;
534 }
535 break;
afc42102 536 }
7f6ddf58 537
4fa1e629 538
539 //****** select tracks which are "good" enough
540 AliStack* stack = rl->Stack();
541 for (i=0; i<np; i++) {
542 if ((good[i]&0x5000) != 0x5000)
543 if ((good[i]&0x2800) != 0x2800) continue;
544 if ((good[i]&0x7FF ) < good_number) continue;
545
546 TParticle *p = (TParticle*)stack->Particle(i);
547 if (p == 0x0) {
88cb7938 548 cerr<<"Can not get particle "<<i<<endl;
549 continue;
024a7fe9 550 }
4fa1e629 551 if (p->Pt()<0.100) continue;
552 if (TMath::Abs(p->Pz()/p->Pt())>0.999) continue;
bf018fe4 553
4fa1e629 554 Double_t vx=p->Vx(),vy=p->Vy();
555 if (TMath::Sqrt(vx*vx+vy*vy)>3.5) continue;
7f6ddf58 556
4fa1e629 557 AliTrackReference *ref=new((*refs)[nt]) AliTrackReference();
558
559 ref->SetLabel(i);
560 Int_t pdg=p->GetPdgCode();
561 ref->SetLength(pdg); //This will the particle's PDG !
562 ref->SetMomentum(0.,0.,0.);
563 ref->SetPosition(0.,0.,0.);
564
565 nt++;
566 }
567
568 //**** check if there is also information at the entrance of the TPC
569 TTree *TR=rl->TreeTR();
570 TBranch *branch=TR->GetBranch("TPC");
571 if (branch==0) {
572 ::Error("GoodTracksTPC","No track references !");
573 delete rl;
574 return 5;
575 }
576 TClonesArray tpcdummy("AliTrackReference",1000), *tpcRefs=&tpcdummy;
577 branch->SetAddress(&tpcRefs);
578 Int_t nr=(Int_t)TR->GetEntries();
579 for (Int_t r=0; r<nr; r++) {
580 //cerr<<r<<' '<<nr<<'\r';
581 TR->GetEvent(r);
582 if (tpcRefs->GetEntriesFast()==0) continue;
583 AliTrackReference *tpcRef=(AliTrackReference*)tpcRefs->UncheckedAt(0);
584 Int_t j;
585 AliTrackReference *ref=0;
586 for (j=0; j<nt; j++) {
587 ref=(AliTrackReference *)refs->UncheckedAt(j);
588 if (ref->Label()==tpcRef->Label()) break;
589 ref=0;
590 }
591 if (ref==0) continue;
592
593 ref->SetMomentum(tpcRef->Px(),tpcRef->Py(),tpcRef->Pz());
594 ref->SetPosition(tpcRef->LocalX(),tpcRef->LocalY(),tpcRef->Z());
595
596 tpcRefs->Clear();
597 }
598
599 tpcTree.Fill();
600
601 delete[] good;
602 } //****** end of the loop over generated events
7f6ddf58 603
88cb7938 604
4fa1e629 605 tpcTree.Write();
606 file->Close();
7f6ddf58 607
4fa1e629 608 delete rl;
609 return 0;
8c555625 610}