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Commit | Line | Data |
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cc80f89e | 1 | struct GoodTrack { |
2 | Int_t lab; | |
3 | Int_t code; | |
4 | Float_t px,py,pz; | |
5 | Float_t x,y,z; | |
6 | }; | |
7 | Int_t good_tracks(GoodTrack *gt, Int_t max); | |
8 | ||
8c555625 | 9 | void AliTPCTestTracking() { |
cc80f89e | 10 | const char *pname="75x40_100x60"; |
8c555625 | 11 | |
12 | // Dynamically link some shared libs | |
cc80f89e | 13 | |
8c555625 | 14 | if (gClassTable->GetID("AliRun") < 0) { |
15 | gROOT->LoadMacro("loadlibs.C"); | |
16 | loadlibs(); | |
17 | } else { | |
18 | delete gAlice; | |
19 | gAlice=0; | |
20 | } | |
21 | ||
22 | // Connect the Root Galice file containing Geometry, Kine and Hits | |
23 | TFile *file = (TFile*)gROOT->GetListOfFiles()->FindObject("galice.root"); | |
24 | if (!file) file = new TFile("galice.root"); | |
cc80f89e | 25 | //if (!file) file = TFile::Open("rfio:galice.root"); |
8c555625 | 26 | |
27 | // Get AliRun object from file or create it if not on file | |
28 | if (!gAlice) { | |
29 | gAlice = (AliRun*)file->Get("gAlice"); | |
30 | if (gAlice) printf("AliRun object found on file\n"); | |
31 | if (!gAlice) gAlice = new AliRun("gAlice","Alice test program"); | |
32 | } | |
33 | ||
34 | gAlice->GetEvent(0); | |
35 | ||
8c555625 | 36 | AliTPC *TPC = (AliTPC*)gAlice->GetDetector("TPC"); |
cc80f89e | 37 | Int_t ver=TPC->IsVersion(); |
8c555625 | 38 | cerr<<"TPC version "<<ver<<" has been found !\n"; |
39 | ||
cc80f89e | 40 | AliTPCParam *digp= (AliTPCParam*)file->Get(pname); |
41 | if (digp!=0) TPC->SetParam(digp); | |
8c555625 | 42 | else cerr<<"Warning: default TPC parameters will be used !\n"; |
43 | ||
cc80f89e | 44 | Int_t nrow_up=TPC->GetParam()->GetNRowUp(); |
45 | Int_t nrows=TPC->GetParam()->GetNRowLow()+nrow_up; | |
3c0f9266 | 46 | |
8c555625 | 47 | switch (ver) { |
48 | case 1: | |
49 | cerr<<"Making clusters...\n"; | |
50 | TPC->Hits2Clusters(); | |
8c555625 | 51 | break; |
52 | case 2: | |
53 | cerr<<"Looking for clusters...\n"; | |
54 | TPC->Digits2Clusters(); | |
8c555625 | 55 | break; |
56 | default: | |
57 | cerr<<"Invalid TPC version !\n"; | |
58 | return; | |
59 | } | |
60 | ||
cc80f89e | 61 | TClonesArray *clusters=TPC->Clusters(); |
62 | Int_t n=clusters->GetEntriesFast(); | |
63 | cerr<<"Number of clusters "<<n<<" \n"; | |
64 | ||
8c555625 | 65 | cerr<<"Looking for tracks...\n"; |
cc80f89e | 66 | TStopwatch timer; |
8c555625 | 67 | TPC->Clusters2Tracks(); |
cc80f89e | 68 | timer.Stop(); timer.Print(); |
69 | Int_t nt=0; | |
8c555625 | 70 | TClonesArray *tracks=TPC->Tracks(); |
71 | if (tracks) nt=tracks->GetEntriesFast(); | |
72 | cerr<<"Number of found tracks "<<nt<<endl; | |
73 | ||
74 | ///////////////////////////////////////////////////////////////////////// | |
cc80f89e | 75 | GoodTrack gt[7000]; |
76 | Int_t ngood=0; | |
77 | ifstream in("good_tracks"); | |
78 | if (in) { | |
79 | cerr<<"Reading good tracks...\n"; | |
80 | while (in>>gt[ngood].lab>>gt[ngood].code | |
81 | >>gt[ngood].px >>gt[ngood].py>>gt[ngood].pz | |
82 | >>gt[ngood].x >>gt[ngood].y >>gt[ngood].z) { | |
83 | ngood++; | |
84 | cerr<<ngood<<'\r'; | |
85 | if (ngood==7000) { | |
86 | cerr<<"Too many good tracks !\n"; | |
87 | break; | |
88 | } | |
89 | } | |
90 | if (!in.eof()) cerr<<"Read error (good_tracks) !\n"; | |
91 | } else { | |
92 | cerr<<"Marking good tracks (this will take a while)...\n"; | |
93 | ngood=good_tracks(gt,7000); | |
94 | ofstream out("good_tracks"); | |
95 | if (out) { | |
96 | for (Int_t ngd=0; ngd<ngood; ngd++) | |
97 | out<<gt[ngd].lab<<' '<<gt[ngd].code<<' ' | |
98 | <<gt[ngd].px <<' '<<gt[ngd].py<<' '<<gt[ngd].pz<<' ' | |
99 | <<gt[ngd].x <<' '<<gt[ngd].y <<' '<<gt[ngd].z <<endl; | |
100 | } else cerr<<"Can not open file (good_tracks) !\n"; | |
101 | out.close(); | |
102 | } | |
103 | cerr<<"Number of good tracks : "<<ngood<<endl; | |
104 | ||
8c555625 | 105 | cerr<<"Doing comparison...\n"; |
cc80f89e | 106 | TH1F *hp=new TH1F("hp","PHI resolution",50,-20.,20.); hp->SetFillColor(4); |
107 | TH1F *hl=new TH1F("hl","LAMBDA resolution",50,-20,20);hl->SetFillColor(4); | |
8c555625 | 108 | TH1F *hpt=new TH1F("hpt","Relative Pt resolution",30,-10.,10.); |
109 | hpt->SetFillColor(2); | |
cc80f89e | 110 | TH1F *hmpt=new TH1F("hmpt","Relative Pt resolution (pt>4GeV/c)",30,-60,60); |
111 | hmpt->SetFillColor(6); | |
8c555625 | 112 | |
cc80f89e | 113 | TH1F *hgood=new TH1F("hgood","Good tracks",20,0,7); |
114 | TH1F *hfound=new TH1F("hfound","Found tracks",20,0,7); | |
115 | TH1F *hfake=new TH1F("hfake","Fake tracks",20,0,7); | |
116 | TH1F *hg=new TH1F("hg","",20,0,7); //efficiency for good tracks | |
8c555625 | 117 | hg->SetLineColor(4); hg->SetLineWidth(2); |
cc80f89e | 118 | TH1F *hf=new TH1F("hf","Efficiency for fake tracks",20,0,7); |
8c555625 | 119 | hf->SetFillColor(1); hf->SetFillStyle(3013); hf->SetLineWidth(2); |
120 | ||
cc80f89e | 121 | TH1F *he =new TH1F("he","dE/dX for pions with 0.4<p<0.5 GeV/c",50,0.,100.); |
122 | TH2F *hep=new TH2F("hep","dE/dX vs momentum",50,0.,2.,50,0.,200.); | |
8c555625 | 123 | |
cc80f89e | 124 | while (ngood--) { |
125 | Int_t lab=gt[ngood].lab,tlab; | |
126 | Float_t ptg= | |
127 | TMath::Sqrt(gt[ngood].px*gt[ngood].px + gt[ngood].py*gt[ngood].py); | |
8c555625 | 128 | |
129 | hgood->Fill(ptg); | |
cc80f89e | 130 | |
131 | AliTPCtrack *track; | |
132 | Int_t i; | |
133 | for (i=0; i<nt; i++) { | |
134 | track=(AliTPCtrack*)tracks->UncheckedAt(i); | |
135 | tlab=track->GetLabel(nrows); | |
136 | if (lab==TMath::Abs(tlab)) break; | |
8c555625 | 137 | } |
cc80f89e | 138 | if (i==nt) { |
139 | cerr<<"Track "<<lab<<" was not found !\n"; | |
140 | continue; | |
141 | } | |
142 | Double_t xk=gt[ngood].x;//digp->GetPadRowRadii(0,0); | |
143 | track->PropagateTo(xk); | |
3c0f9266 | 144 | |
cc80f89e | 145 | if (lab==tlab) hfound->Fill(ptg); |
146 | else { hfake->Fill(ptg); cerr<<lab<<" fake\n";} | |
147 | ||
148 | Double_t px,py,pz,pt=fabs(track->GetPt());track->GetPxPyPz(px,py,pz); | |
149 | ||
150 | if (TMath::Abs(gt[ngood].code)==11 && ptg>4.) { | |
151 | hmpt->Fill((1/pt - 1/ptg)/(1/ptg)*100.); | |
152 | } else { | |
153 | Float_t phig=TMath::ATan2(gt[ngood].py,gt[ngood].px); | |
154 | Float_t phi =TMath::ATan2(py,px ); | |
155 | hp->Fill((phi - phig)*1000.); | |
3c0f9266 | 156 | |
cc80f89e | 157 | Float_t lamg=TMath::ATan2(gt[ngood].pz,ptg); |
158 | Float_t lam =TMath::ATan2(pz ,pt ); | |
159 | hl->Fill((lam - lamg)*1000.); | |
160 | ||
161 | hpt->Fill((1/pt - 1/ptg)/(1/ptg)*100.); | |
162 | } | |
163 | Float_t mom=track->GetP(); | |
164 | Float_t dedx=track->GetdEdX(0.05,0.70); | |
165 | hep->Fill(mom,dedx,1.); | |
166 | if (TMath::Abs(gt[ngood].code)==211) | |
167 | if (mom>0.4 && mom<0.5) { | |
168 | he->Fill(dedx,1.); | |
169 | } | |
170 | } | |
171 | ||
172 | Stat_t ng=hgood->GetEntries(); cerr<<"Good tracks "<<ng<<endl; | |
173 | Stat_t nf=hfound->GetEntries(); | |
174 | if (ng!=0) | |
175 | cerr<<"Integral efficiency is about "<<nf/ng*100.<<" %\n"; | |
8c555625 | 176 | |
177 | gStyle->SetOptStat(111110); | |
178 | gStyle->SetOptFit(1); | |
179 | ||
180 | TCanvas *c1=new TCanvas("c1","",0,0,700,850); | |
181 | ||
182 | TPad *p1=new TPad("p1","",0,0.3,.5,.6); p1->Draw(); | |
183 | p1->cd(); p1->SetFillColor(42); p1->SetFrameFillColor(10); | |
184 | hp->SetFillColor(4); hp->SetXTitle("(mrad)"); hp->Fit("gaus"); c1->cd(); | |
185 | ||
186 | TPad *p2=new TPad("p2","",0.5,.3,1,.6); p2->Draw(); | |
187 | p2->cd(); p2->SetFillColor(42); p2->SetFrameFillColor(10); | |
188 | hl->SetXTitle("(mrad)"); hl->Fit("gaus"); c1->cd(); | |
189 | ||
190 | TPad *p3=new TPad("p3","",0,0,0.5,0.3); p3->Draw(); | |
191 | p3->cd(); p3->SetFillColor(42); p3->SetFrameFillColor(10); | |
192 | hpt->SetXTitle("(%)"); hpt->Fit("gaus"); c1->cd(); | |
193 | ||
194 | TPad *p4=new TPad("p4","",0.5,0,1,0.3); p4->Draw(); | |
195 | p4->cd(); p4->SetFillColor(42); p4->SetFrameFillColor(10); | |
cc80f89e | 196 | hmpt->SetXTitle("(%)"); hmpt->Fit("gaus"); c1->cd(); |
8c555625 | 197 | |
198 | TPad *p5=new TPad("p5","",0,0.6,1,1); p5->Draw(); p5->cd(); | |
3c0f9266 | 199 | p5->SetFillColor(41); p5->SetFrameFillColor(10); |
8c555625 | 200 | hfound->Sumw2(); hgood->Sumw2(); hfake->Sumw2(); |
201 | hg->Divide(hfound,hgood,1,1.,"b"); | |
202 | hf->Divide(hfake,hgood,1,1.,"b"); | |
203 | hg->SetMaximum(1.4); | |
204 | hg->SetYTitle("Tracking efficiency"); | |
205 | hg->SetXTitle("Pt (GeV/c)"); | |
206 | hg->Draw(); | |
207 | ||
cc80f89e | 208 | TLine *line1 = new TLine(0,1.0,7,1.0); line1->SetLineStyle(4); |
8c555625 | 209 | line1->Draw("same"); |
cc80f89e | 210 | TLine *line2 = new TLine(0,0.9,7,0.9); line2->SetLineStyle(4); |
8c555625 | 211 | line2->Draw("same"); |
212 | ||
213 | hf->SetFillColor(1); | |
214 | hf->SetFillStyle(3013); | |
215 | hf->SetLineColor(2); | |
216 | hf->SetLineWidth(2); | |
217 | hf->Draw("histsame"); | |
218 | TText *text = new TText(0.461176,0.248448,"Fake tracks"); | |
219 | text->SetTextSize(0.05); | |
220 | text->Draw(); | |
221 | text = new TText(0.453919,1.11408,"Good tracks"); | |
222 | text->SetTextSize(0.05); | |
223 | text->Draw(); | |
3c0f9266 | 224 | |
225 | ||
226 | ||
227 | TCanvas *c2=new TCanvas("c2","",320,32,530,590); | |
228 | ||
229 | TPad *p6=new TPad("p6","",0.,0.,1.,.5); p6->Draw(); | |
230 | p6->cd(); p6->SetFillColor(42); p6->SetFrameFillColor(10); | |
231 | he->SetFillColor(2); he->SetFillStyle(3005); | |
232 | he->SetXTitle("Arbitrary Units"); | |
233 | he->Fit("gaus"); c2->cd(); | |
234 | ||
235 | TPad *p7=new TPad("p7","",0.,0.5,1.,1.); p7->Draw(); | |
236 | p7->cd(); p7->SetFillColor(42); p7->SetFrameFillColor(10); | |
237 | hep->SetXTitle("p (Gev/c)"); hep->SetYTitle("dE/dX (Arb. Units)"); | |
238 | hep->Draw(); c1->cd(); | |
239 | ||
cc80f89e | 240 | } |
3c0f9266 | 241 | |
cc80f89e | 242 | |
243 | Int_t good_tracks(GoodTrack *gt, Int_t max) { | |
244 | const char *tname="TreeD_75x40_100x60"; | |
245 | ||
246 | Int_t nt=0; | |
247 | ||
248 | AliTPC *TPC = (AliTPC*)gAlice->GetDetector("TPC"); | |
249 | Int_t ver=TPC->IsVersion(); | |
250 | AliTPCParam *digp= (AliTPCParam*)TPC->GetParam(); | |
251 | ||
252 | Int_t nrow_up=TPC->GetParam()->GetNRowUp(); | |
253 | Int_t nrows=TPC->GetParam()->GetNRowLow()+nrow_up; | |
254 | Int_t zero=TPC->GetParam()->GetZeroSup(); | |
255 | Int_t gap=Int_t(0.125*nrows); | |
256 | Int_t good_number=Int_t(0.4*nrows); | |
257 | ||
258 | //gAlice->GetEvent(0); | |
259 | TClonesArray *particles=gAlice->Particles(); | |
260 | Int_t np=particles->GetEntriesFast(); | |
261 | Int_t *good=new Int_t[np]; | |
262 | for (Int_t ii=0; ii<np; ii++) good[ii]=0; | |
263 | ||
264 | switch (ver) { | |
265 | case 1: | |
266 | TClonesArray *clusters=TPC->Clusters(); | |
267 | Int_t n=0; | |
268 | if (clusters) n=clusters->GetEntriesFast(); | |
269 | for (Int_t i=0; i<n; i++) { | |
270 | AliTPCcluster *c=(AliTPCcluster*)clusters->UncheckedAt(i); | |
271 | Int_t lab=c->fTracks[0]; | |
272 | if (lab<0) continue; //noise cluster | |
273 | lab=TMath::Abs(lab); | |
274 | Int_t sec=c->fSector, row=c->fPadRow; | |
275 | if (sec>=digp->GetNInnerSector()) | |
276 | if (row==nrow_up-1 ) good[lab]|=0x1000; | |
277 | if (sec>=digp->GetNInnerSector()) | |
278 | if (row==nrow_up-1-gap) good[lab]|=0x800; | |
279 | good[lab]++; | |
280 | } | |
281 | break; | |
282 | case 2: | |
283 | TTree *TD=(TTree*)gDirectory->Get(tname); | |
284 | AliSimDigits da, *digits=&da; | |
285 | TD->GetBranch("Segment")->SetAddress(&digits); | |
286 | Int_t *count = new Int_t[np]; | |
287 | Int_t i; | |
288 | for (i=0; i<np; i++) count[i]=0; | |
289 | Int_t sectors_by_rows=(Int_t)TD->GetEntries(); | |
290 | for (i=0; i<sectors_by_rows; i++) { | |
291 | if (!TD->GetEvent(i)) continue; | |
292 | Int_t sec,row; | |
293 | digp->AdjustSectorRow(digits->GetID(),sec,row); | |
294 | cerr<<sec<<' '<<row<<" \r"; | |
295 | digits->First(); | |
296 | while (digits->Next()) { | |
297 | Int_t it=digits->CurrentRow(), ip=digits->CurrentColumn(); | |
298 | Short_t dig = digits->GetDigit(it,ip); | |
299 | Int_t idx0=digits->GetTrackID(it,ip,0); | |
300 | Int_t idx1=digits->GetTrackID(it,ip,1); | |
301 | Int_t idx2=digits->GetTrackID(it,ip,2); | |
302 | if (idx0>=0 && dig>=zero) count[idx0]+=1; | |
303 | if (idx1>=0 && dig>=zero) count[idx1]+=1; | |
304 | if (idx2>=0 && dig>=zero) count[idx2]+=1; | |
305 | } | |
306 | for (Int_t j=0; j<np; j++) { | |
307 | if (count[j]>1) { | |
308 | if (sec>=digp->GetNInnerSector()) | |
309 | if (row==nrow_up-1 ) good[j]|=0x1000; | |
310 | if (sec>=digp->GetNInnerSector()) | |
311 | if (row==nrow_up-1-gap) good[j]|=0x800; | |
312 | good[j]++; | |
313 | } | |
314 | count[j]=0; | |
315 | } | |
316 | } | |
317 | delete[] count; | |
318 | break; | |
319 | default: | |
320 | cerr<<"Invalid TPC version !\n"; | |
321 | return; | |
322 | } | |
323 | ||
324 | TTree *TH=gAlice->TreeH(); | |
325 | TClonesArray *hits=TPC->Hits(); | |
326 | Int_t npart=TH->GetEntries(); | |
327 | ||
328 | while (npart--) { | |
329 | TPC->ResetHits(); | |
330 | TH->GetEvent(npart); | |
331 | Int_t nhits=hits->GetEntriesFast(); | |
332 | if (nhits==0) continue; | |
333 | AliTPChit *hit; | |
334 | Int_t j; | |
335 | for (j=0; j<nhits-1; j++) { | |
336 | hit=(AliTPChit*)hits->UncheckedAt(j); | |
337 | if (hit->fQ==0.) break; | |
338 | } | |
339 | if (j==nhits-1) continue; | |
340 | AliTPChit *hit1=(AliTPChit*)hits->UncheckedAt(j+1); | |
341 | if (hit1->fQ != 0.) continue; | |
342 | Int_t i=hit->fTrack; | |
343 | TParticle *p = (TParticle*)particles->UncheckedAt(i); | |
344 | if (p->GetFirstMother()>=0) continue; //secondary particle | |
345 | if (good[i] < 0x1000+0x800+2+good_number) continue; | |
346 | if (p->Pt()<0.100) continue; | |
347 | if (TMath::Abs(p->Pz()/p->Pt())>0.999) continue; | |
348 | ||
349 | gt[nt].lab=i; | |
350 | gt[nt].code=p->GetPdgCode(); | |
351 | //**** px py pz - in global coordinate system, x y z - in local ! | |
352 | gt[nt].px=hit->fX; gt[nt].py=hit->fY; gt[nt].pz=hit->fZ; | |
353 | Float_t cs,sn; digp->AdjustCosSin(hit1->fSector,cs,sn); | |
354 | gt[nt].x = hit1->fX*cs + hit1->fY*sn; | |
355 | gt[nt].y =-hit1->fX*sn + hit1->fY*cs; | |
356 | gt[nt].z = hit1->fZ; | |
357 | nt++; | |
358 | ||
359 | cerr<<i<<" \r"; | |
360 | if (nt==max) {cerr<<"Too many good tracks !\n"; break;} | |
361 | } | |
362 | delete[] good; | |
363 | return nt; | |
8c555625 | 364 | } |
365 |