Updated code for tracking V2 (from Y. Belikov)
[u/mrichter/AliRoot.git] / ITS / AliITSComparisonV2.C
CommitLineData
006b5f7f 1#ifndef __CINT__
2 #include <iostream.h>
3 #include <fstream.h>
4
5 #include "AliRun.h"
6 #include "AliITS.h"
7 #include "AliITSgeom.h"
8 #include "AliITStrackerV2.h"
9 #include "AliITStrackV2.h"
10 #include "AliITSclusterV2.h"
11
12 #include "TFile.h"
13 #include "TTree.h"
14 #include "TH1.h"
15 #include "TObjArray.h"
16 #include "TStyle.h"
17 #include "TCanvas.h"
18 #include "TLine.h"
19 #include "TText.h"
20 #include "TParticle.h"
21#endif
22
c7ee21ca 23struct GoodTrackITS {
006b5f7f 24 Int_t lab;
25 Int_t code;
26 Float_t px,py,pz;
27 Float_t x,y,z;
28};
006b5f7f 29
7f6ddf58 30Int_t AliITSComparisonV2(Int_t event=0) {
006b5f7f 31 cerr<<"Doing comparison...\n";
32
7f6ddf58 33 const Int_t MAX=15000;
34 Int_t good_tracks_its(GoodTrackITS *gt, const Int_t max, const Int_t event);
35
36 Int_t nentr=0; TObjArray tarray(2000);
37 {/* Load tracks */
38 TFile *tf=TFile::Open("AliITStracksV2.root");
39 if (!tf->IsOpen()) {cerr<<"Can't open AliITStracksV2.root !\n"; return 3;}
40 char tname[100]; sprintf(tname,"TreeT_ITS_%d",event);
41 TTree *tracktree=(TTree*)tf->Get(tname);
42 if (!tracktree) {cerr<<"Can't get a tree with ITS tracks !\n"; return 4;}
43 TBranch *tbranch=tracktree->GetBranch("tracks");
44 nentr=(Int_t)tracktree->GetEntries();
45 for (Int_t i=0; i<nentr; i++) {
46 AliITStrackV2 *iotrack=new AliITStrackV2;
47 tbranch->SetAddress(&iotrack);
48 tracktree->GetEvent(i);
49 tarray.AddLast(iotrack);
50 /*if (itsLabel != 1234) continue;
51 Int_t nc=iotrack->GetNumberOfClusters();
52 for (Int_t k=0; k<nc; k++) {
53 Int_t index=iotrack->GetClusterIndex(k);
54 AliITSclusterV2 *c=tracker.GetCluster(index);
55 cout<<c->GetLabel(0)<<' '<<c->GetLabel(1)<<' '<<c->GetLabel(2)<<endl;
56 }*/
57 }
58 delete tracktree; //Thanks to Mariana Bondila
59 tf->Close();
c7ee21ca 60 }
006b5f7f 61
7f6ddf58 62 /* Generate a list of "good" tracks */
c7ee21ca 63 GoodTrackITS gt[MAX];
006b5f7f 64 Int_t ngood=0;
65 ifstream in("good_tracks_its");
66 if (in) {
67 cerr<<"Reading good tracks...\n";
7f6ddf58 68 while (in>>gt[ngood].lab>>gt[ngood].code>>
006b5f7f 69 gt[ngood].px>>gt[ngood].py>>gt[ngood].pz>>
70 gt[ngood].x >>gt[ngood].y >>gt[ngood].z) {
71 ngood++;
72 cerr<<ngood<<'\r';
c7ee21ca 73 if (ngood==MAX) {
006b5f7f 74 cerr<<"Too many good tracks !\n";
75 break;
76 }
77 }
78 if (!in.eof()) cerr<<"Read error (good_tracks_its) !\n";
79 } else {
80 cerr<<"Marking good tracks (this will take a while)...\n";
7f6ddf58 81 ngood=good_tracks_its(gt,MAX,event);
006b5f7f 82 ofstream out("good_tracks_its");
83 if (out) {
c7ee21ca 84 for (Int_t ngd=0; ngd<ngood; ngd++)
7f6ddf58 85 out<<gt[ngd].lab<<' '<<gt[ngd].code<<' '
c7ee21ca 86 <<gt[ngd].px<<' '<<gt[ngd].py<<' '<<gt[ngd].pz<<' '
87 <<gt[ngd].x <<' '<<gt[ngd].y <<' '<<gt[ngd].z <<endl;
006b5f7f 88 } else cerr<<"Can not open file (good_tracks_its) !\n";
89 out.close();
90 }
91 cerr<<"Number of good tracks : "<<ngood<<endl;
92
93 TH1F *hp=new TH1F("hp","PHI resolution",50,-20.,20.); hp->SetFillColor(4);
94 TH1F *hl=new TH1F("hl","LAMBDA resolution",50,-20,20);hl->SetFillColor(4);
95 TH1F *hpt=new TH1F("hpt","Relative Pt resolution",30,-10.,10.);
96 hpt->SetFillColor(2);
97 TH1F *hmpt=new TH1F("hmpt","Transverse impact parameter",30,-300,300);
98 hmpt->SetFillColor(6);
99 TH1F *hz=new TH1F("hz","Longitudinal impact parameter",30,-300,300);
100 //hmpt->SetFillColor(6);
101
14825d5a 102 AliITStrackV2 *trk=(AliITStrackV2*)tarray.UncheckedAt(0);
103 Double_t pmin=0.1*(100/0.299792458/0.2/trk->GetConvConst());
104 Double_t pmax=6.0+pmin;
105
106 TH1F *hgood=new TH1F("hgood","Good tracks",30,pmin,pmax);
107 TH1F *hfound=new TH1F("hfound","Found tracks",30,pmin,pmax);
108 TH1F *hfake=new TH1F("hfake","Fake tracks",30,pmin,pmax);
109 TH1F *hg=new TH1F("hg","",30,pmin,pmax); //efficiency for good tracks
006b5f7f 110 hg->SetLineColor(4); hg->SetLineWidth(2);
14825d5a 111 TH1F *hf=new TH1F("hf","Efficiency for fake tracks",30,pmin,pmax);
006b5f7f 112 hf->SetFillColor(1); hf->SetFillStyle(3013); hf->SetLineWidth(2);
113
14825d5a 114 TH1F *hptw=new TH1F("hptw","Weghted pt",30,pmax,pmin);
006b5f7f 115
116 while (ngood--) {
117 Int_t lab=gt[ngood].lab, tlab=-1;
118 Double_t pxg=gt[ngood].px, pyg=gt[ngood].py, pzg=gt[ngood].pz;
119 Double_t ptg=TMath::Sqrt(pxg*pxg+pyg*pyg);
120
14825d5a 121 if (ptg<pmin) continue;
122
006b5f7f 123 hgood->Fill(ptg);
124
125 AliITStrackV2 *track=0;
126 Int_t j;
127 for (j=0; j<nentr; j++) {
128 track=(AliITStrackV2*)tarray.UncheckedAt(j);
129 tlab=track->GetLabel();
130 if (lab==TMath::Abs(tlab)) break;
131 }
132 if (j==nentr) {
133 cerr<<"Track "<<lab<<" was not found !\n";
134 continue;
135 }
a9a2d814 136 track->PropagateTo(3.,0.0028,65.19);
006b5f7f 137 track->PropagateToVertex();
138
139 if (lab==tlab) hfound->Fill(ptg);
140 else { hfake->Fill(ptg); cerr<<lab<<" fake\n";}
141
142 Double_t xv,par[5]; track->GetExternalParameters(xv,par);
143 Float_t phi=TMath::ASin(par[2]) + track->GetAlpha();
144 if (phi<-TMath::Pi()) phi+=2*TMath::Pi();
145 if (phi>=TMath::Pi()) phi-=2*TMath::Pi();
146 Float_t lam=TMath::ATan(par[3]);
147 Float_t pt_1=TMath::Abs(par[4]);
148
149 Double_t phig=TMath::ATan2(pyg,pxg);
150 hp->Fill((phi - phig)*1000.);
151
152 Double_t lamg=TMath::ATan2(pzg,ptg);
153 hl->Fill((lam - lamg)*1000.);
154
155 Double_t d=10000*track->GetD();
156 hmpt->Fill(d);
157
158 hptw->Fill(ptg,TMath::Abs(d));
159
160 Double_t z=10000*track->GetZ();
161 hz->Fill(z);
162
163//if (TMath::Abs(gt[ngood].code)==11 && ptg>4.)
164 hpt->Fill((pt_1 - 1/ptg)/(1/ptg)*100.);
165
166 }
167
168 Stat_t ng=hgood->GetEntries(); cerr<<"Good tracks "<<ng<<endl;
169 Stat_t nf=hfound->GetEntries();
170 if (ng!=0)
171 cerr<<"Integral efficiency is about "<<nf/ng*100.<<" %\n";
172
173 gStyle->SetOptStat(111110);
174 gStyle->SetOptFit(1);
175
176 TCanvas *c1=new TCanvas("c1","",0,0,700,850);
177
178 TPad *p1=new TPad("p1","",0,0.3,.5,.6); p1->Draw();
179 p1->cd(); p1->SetFillColor(42); p1->SetFrameFillColor(10);
180 hp->SetFillColor(4); hp->SetXTitle("(mrad)"); hp->Fit("gaus"); c1->cd();
181
182 TPad *p2=new TPad("p2","",0.5,.3,1,.6); p2->Draw();
183 p2->cd(); p2->SetFillColor(42); p2->SetFrameFillColor(10);
184 hl->SetXTitle("(mrad)"); hl->Fit("gaus"); c1->cd();
185
186 TPad *p3=new TPad("p3","",0,0,0.5,0.3); p3->Draw();
187 p3->cd(); p3->SetFillColor(42); p3->SetFrameFillColor(10);
188 hpt->SetXTitle("(%)"); hpt->Fit("gaus"); c1->cd();
189
190 TPad *p4=new TPad("p4","",0.5,0,1,0.3); p4->Draw();
191 p4->cd(); p4->SetFillColor(42); p4->SetFrameFillColor(10);
192 hmpt->SetXTitle("(micron)"); hmpt->Fit("gaus"); hz->Draw("same"); c1->cd();
193 //hfound->Sumw2();
194 //hptw->Sumw2();
195 //hg->SetMaximum(333);
196 //hg->SetYTitle("Impact Parameter Resolution (micron)");
197 //hg->SetXTitle("Pt (GeV/c)");
198 //hg->GetXaxis()->SetRange(0,10);
199 //hg->Divide(hptw,hfound,1,1.);
200 //hg->DrawCopy(); c1->cd();
201
202
203 TPad *p5=new TPad("p5","",0,0.6,1,1); p5->Draw(); p5->cd();
204 p5->SetFillColor(41); p5->SetFrameFillColor(10);
205 hfound->Sumw2(); hgood->Sumw2(); hfake->Sumw2();
206 hg->Divide(hfound,hgood,1,1.,"b");
207 hf->Divide(hfake,hgood,1,1.,"b");
208 hg->SetMaximum(1.4);
209 hg->SetYTitle("Tracking efficiency");
210 hg->SetXTitle("Pt (GeV/c)");
211 hg->Draw();
212
14825d5a 213 TLine *line1 = new TLine(pmin,1.0,pmax,1.0); line1->SetLineStyle(4);
006b5f7f 214 line1->Draw("same");
14825d5a 215 TLine *line2 = new TLine(pmin,0.9,pmax,0.9); line2->SetLineStyle(4);
006b5f7f 216 line2->Draw("same");
217
218 hf->SetFillColor(1);
219 hf->SetFillStyle(3013);
220 hf->SetLineColor(2);
221 hf->SetLineWidth(2);
222 hf->Draw("histsame");
223 TText *text = new TText(0.461176,0.248448,"Fake tracks");
224 text->SetTextSize(0.05);
225 text->Draw();
226 text = new TText(0.453919,1.11408,"Good tracks");
227 text->SetTextSize(0.05);
228 text->Draw();
229
230 return 0;
231}
232
7f6ddf58 233Int_t good_tracks_its(GoodTrackITS *gt, const Int_t max, const Int_t event) {
006b5f7f 234 if (gAlice) {delete gAlice; gAlice=0;}
235
236 TFile *file=TFile::Open("galice.root");
237 if (!file->IsOpen()) {cerr<<"Can't open galice.root !\n"; exit(4);}
238 if (!(gAlice=(AliRun*)file->Get("gAlice"))) {
239 cerr<<"gAlice have not been found on galice.root !\n";
240 exit(5);
241 }
242
7f6ddf58 243 Int_t np=gAlice->GetEvent(event);
006b5f7f 244
245 Int_t *good=new Int_t[np];
246 Int_t k;
247 for (k=0; k<np; k++) good[k]=0;
248
249 AliITS *ITS=(AliITS*)gAlice->GetDetector("ITS");
250 if (!ITS) {
251 cerr<<"can't get ITS !\n"; exit(8);
252 }
253 AliITSgeom *geom=ITS->GetITSgeom();
254 if (!geom) {
c7ee21ca 255 cerr<<"can't get ITS geometry !\n"; exit(9);
006b5f7f 256 }
257
258 TFile *cf=TFile::Open("AliITSclustersV2.root");
259 if (!cf->IsOpen()){
260 cerr<<"Can't open AliITSclustersV2.root !\n"; exit(6);
261 }
7f6ddf58 262 char cname[100]; sprintf(cname,"TreeC_ITS_%d",event);
263 TTree *cTree=(TTree*)cf->Get(cname);
006b5f7f 264 if (!cTree) {
265 cerr<<"Can't get cTree !\n"; exit(7);
266 }
267 TBranch *branch=cTree->GetBranch("Clusters");
268 if (!branch) {
269 cerr<<"Can't get clusters branch !\n"; exit(8);
270 }
271 TClonesArray *clusters=new TClonesArray("AliITSclusterV2",10000);
272 branch->SetAddress(&clusters);
273
274 Int_t entr=(Int_t)cTree->GetEntries();
275 for (k=0; k<entr; k++) {
c7ee21ca 276 cTree->GetEvent(k);
277 Int_t ncl=clusters->GetEntriesFast(); if (ncl==0) continue;
14825d5a 278 Int_t lay,lad,det; geom->GetModuleId(k,lay,lad,det);
006b5f7f 279 if (lay<1 || lay>6) {
280 cerr<<"wrong layer !\n"; exit(10);
281 }
006b5f7f 282 while (ncl--) {
283 AliITSclusterV2 *pnt=(AliITSclusterV2*)clusters->UncheckedAt(ncl);
284 Int_t l0=pnt->GetLabel(0);
285 Int_t l1=pnt->GetLabel(1);
286 Int_t l2=pnt->GetLabel(2);
287 Int_t mask=1<<(lay-1);
288 if (l0>=0) good[l0]|=mask;
289 if (l1>=0) good[l1]|=mask;
290 if (l2>=0) good[l2]|=mask;
291 }
292 }
293 clusters->Delete(); delete clusters;
c7ee21ca 294 delete cTree; //Thanks to Mariana Bondila
006b5f7f 295 cf->Close();
296
297 ifstream in("good_tracks_tpc");
298 if (!in) {
299 cerr<<"can't get good_tracks_tpc !\n"; exit(11);
300 }
301 Int_t nt=0;
302 Double_t px,py,pz,x,y,z;
7f6ddf58 303 Int_t code,lab;
304 while (in>>lab>>code>>px>>py>>pz>>x>>y>>z) {
006b5f7f 305 if (good[lab] != 0x3F) continue;
306 TParticle *p = (TParticle*)gAlice->Particle(lab);
307 gt[nt].lab=lab;
308 gt[nt].code=p->GetPdgCode();
309//**** px py pz - in global coordinate system
310 gt[nt].px=p->Px(); gt[nt].py=p->Py(); gt[nt].pz=p->Pz();
311 gt[nt].x=gt[nt].y=gt[nt].z=0.;
312 nt++;
313 if (nt==max) {cerr<<"Too many good tracks !\n"; break;}
314 }
315
316 delete[] good;
317
318 delete gAlice; gAlice=0;
319 file->Close();
320
321 return nt;
322}
323
324