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04b80329 1//The purpose of this class is to permorm the ITS tracking.
2//The constructor has the task to inizialize some private members.
3//The method DoTracking is written to be called by a macro. It gets the event number, the minimum and maximum
4//order number of TPC tracks that are to be tracked trough the ITS, and the file where the recpoints are
5//registered.
6//The method Recursivetracking is a recursive function that performs the tracking trough the ITS
7//The method Intersection found the layer, ladder and detector whre the intersection take place and caluclate
8//the cohordinates of this intersection. It returns an integer that is 0 if the intersection has been found
9//successfully.
10//The two mwthods Kalmanfilter and kalmanfiltervert operate the kalmanfilter without and with the vertex
11//imposition respectively.
12//The authors thank Mariana Bondila to have help them to resolve some problems. July-2000
13
14
15#include <fstream.h>
13888096 16#include <TMath.h>
13888096 17#include <TBranch.h>
18#include <TVector.h>
13888096 19#include <TFile.h>
20#include <TTree.h>
cbcfa38d 21#include <TStopwatch.h>
22
13888096 23#include "TParticle.h"
24#include "AliRun.h"
25#include "AliITS.h"
04b80329 26#include "AliITSsegmentationSSD.h"
13888096 27#include "AliITSgeomSPD.h"
28#include "AliITSgeomSDD.h"
29#include "AliITSgeomSSD.h"
30#include "AliITSgeom.h"
13888096 31#include "AliITSRecPoint.h"
04b80329 32#include "stdlib.h"
13888096 33#include "AliKalmanTrack.h"
34#include "AliMagF.h"
04b80329 35#include "AliITSTrackV1.h"
36#include "AliITSIOTrack.h"
37#include "AliITSRad.h"
13888096 38#include "../TPC/AliTPCtracker.h"
13888096 39#include "AliITSTrackerV1.h"
0983ac5b 40#include "AliITSVertex.h"
13888096 41
13888096 42ClassImp(AliITSTrackerV1)
43
44
45//________________________________________________________________
46
04b80329 47AliITSTrackerV1::AliITSTrackerV1(AliITS* IITTSS, Bool_t flag) {
48//Origin A. Badala' and G.S. Pappalardo: e-mail Angela.Badala@ct.infn.it, Giuseppe.S.Pappalardo@ct.infn.it
49// Class constructor. It does some initializations.
13888096 50
04b80329 51 fITS = IITTSS;
52 fPtref=0.;
f66ae545 53 fChi2max=0.;
04b80329 54 fflagvert=flag;
55 Int_t imax=200,jmax=450;
56 frl = new AliITSRad(imax,jmax);
13888096 57
a3894645 58/////////////////////////////////////// gets information on geometry ///////////////////////////////////
59
60 AliITSgeom *g1 = ((AliITS*)gAlice->GetDetector("ITS"))->GetITSgeom();
61
62 Int_t ll=1, dd=1;
63 TVector det(9);
64
65 //cout<<" nlad ed ndet \n";
cbcfa38d 66 Int_t ia;
a3894645 67 for(ia=0; ia<6; ia++) {
68 fNlad[ia]=g1->GetNladders(ia+1);
69 fNdet[ia]=g1->GetNdetectors(ia+1);
70 //cout<<fNlad[i]<<" "<<fNdet[i]<<"\n";
71 }
72 //getchar();
73
74 //cout<<" raggio medio = ";
cbcfa38d 75 Int_t ib;
a3894645 76 for(ib=0; ib<6; ib++) {
77 g1->GetCenterThetaPhi(ib+1,ll,dd,det);
cbcfa38d 78 Double_t r1=TMath::Sqrt(det(0)*det(0)+det(1)*det(1));
79 g1->GetCenterThetaPhi(ib+1,ll,dd+1,det);
80 Double_t r2=TMath::Sqrt(det(0)*det(0)+det(1)*det(1));
81 fAvrad[ib]=(r1+r2)/2.;
a3894645 82 //cout<<fAvrad[ib]<<" ";
83 }
84 //cout<<"\n"; getchar();
85
86 fDetx[0] = ((AliITSgeomSPD*)(g1->GetShape(1, ll, dd)))->GetDx();
87 fDetz[0] = ((AliITSgeomSPD*)(g1->GetShape(1, ll, dd)))->GetDz();
88
89 fDetx[1] = ((AliITSgeomSPD*)(g1->GetShape(2, ll, dd)))->GetDx();
90 fDetz[1] = ((AliITSgeomSPD*)(g1->GetShape(2, ll, dd)))->GetDz();
91
92 fDetx[2] = ((AliITSgeomSDD*)(g1->GetShape(3, ll, dd)))->GetDx();
93 fDetz[2] = ((AliITSgeomSDD*)(g1->GetShape(3, ll, dd)))->GetDz();
94
95 fDetx[3] = ((AliITSgeomSDD*)(g1->GetShape(4, ll, dd)))->GetDx();
96 fDetz[3] = ((AliITSgeomSDD*)(g1->GetShape(4, ll, dd)))->GetDz();
97
98 fDetx[4] = ((AliITSgeomSSD*)(g1->GetShape(5, ll, dd)))->GetDx();
99 fDetz[4] = ((AliITSgeomSSD*)(g1->GetShape(5, ll, dd)))->GetDz();
100
101 fDetx[5] = ((AliITSgeomSSD*)(g1->GetShape(6, ll, dd)))->GetDx();
102 fDetz[5] = ((AliITSgeomSSD*)(g1->GetShape(6, ll, dd)))->GetDz();
103
104 //cout<<" Detx Detz\n";
105 //for(Int_t la=0; la<6; la++) cout<<" "<<fDetx[la]<<" "<<fDetz[la]<<"\n";
106 //getchar();
107//////////////////////////////////////////////////////////////////////////////////////////////////////////
108
cbcfa38d 109////////////////// allocate memory and define matrices fzmin, fzmax, fphimin and fphimax /////////////////////////////////
110
111 Double_t epsz=1.2;
112 Double_t epszdrift=0.05;
113
114 fzmin = new Double_t*[6]; fzmax = new Double_t*[6];
115 Int_t im1, im2, im2max;
116 for(im1=0; im1<6; im1++) {
117 im2max=fNdet[im1];
118 fzmin[im1] = new Double_t[im2max]; fzmax[im1] = new Double_t[im2max];
119 }
120
121 for(im1=0; im1<6; im1++) {
122 im2max=fNdet[im1];
123 for(im2=0; im2<im2max; im2++) {
124 g1->GetCenterThetaPhi(im1+1,1,im2+1,det);
125 if(im2!=0) fzmin[im1][im2]=det(2)-fDetz[im1];
126 else
127 fzmin[im1][im2]=det(2)-(fDetz[im1])*epsz;
128 if(im2!=(im2max-1)) fzmax[im1][im2]=det(2)+fDetz[im1];
129 else
130 fzmax[im1][im2]=det(2)+fDetz[im1]*epsz;
131 if(im1==2 || im1==3) {fzmin[im1][im2]-=epszdrift; fzmax[im1][im2]+=epszdrift;}
132 }
133 }
134
135 fphimin = new Double_t*[6]; fphimax = new Double_t*[6];
136 for(im1=0;im1<6;im1++) {
137 im2max=fNlad[im1];
138 fphimin[im1] = new Double_t[im2max]; fphimax[im1] = new Double_t[im2max];
139 }
140
141 fphidet = new Double_t*[6];
142 for(im1=0; im1<6; im1++) {
143 im2max=fNlad[im1];
144 fphidet[im1] = new Double_t[im2max];
145 }
146
147 Float_t global[3],local[3];
148 Double_t pigre=TMath::Pi();
149 Double_t xmin,ymin,xmax,ymax;
150
151 for(im1=0; im1<6; im1++) {
152 im2max=fNlad[im1];
153 for(im2=0; im2<im2max; im2++) {
154 Int_t idet=2;
155 g1->GetCenterThetaPhi(im1+1,im2+1,idet,det);
156 fphidet[im1][im2]= TMath::ATan2(Double_t(det(1)),Double_t(det(0)));
157 if(fphidet[im1][im2]<0.) fphidet[im1][im2]+=2.*pigre;
158 local[1]=local[2]=0.;
159 local[0]= -(fDetx[im1]);
160 if(im1==0) local[0]= (fDetx[im1]); //to take into account different reference system
161 g1->LtoG(im1+1,im2+1,idet,local,global);
162 xmax=global[0]; ymax=global[1];
163 local[0]= (fDetx[im1]);
164 if(im1==0) local[0]= -(fDetx[im1]); //take into account different reference system
165 g1->LtoG(im1+1,im2+1,idet,local,global);
166 xmin=global[0]; ymin=global[1];
167 fphimin[im1][im2]= TMath::ATan2(ymin,xmin); if(fphimin[im1][im2]<0.) fphimin[im1][im2]+=2.*pigre;
168 fphimax[im1][im2]= TMath::ATan2(ymax,xmax); if(fphimax[im1][im2]<0.) fphimax[im1][im2]+=2.*pigre;
169 }
170 }
171
172//////////////////////////////////////////////////////////////////////////////////////////////////////////
173
a3894645 174//////////////////////////////////////// gets magnetic field factor ////////////////////////////////
175
176 AliMagF * fieldPointer = gAlice->Field();
177 fFieldFactor = (Double_t)fieldPointer->Factor();
178 //cout<< " field factor = "<<fFieldFactor<<"\n"; getchar();
179
180/////////////////////////////////////////////////////////////////////////////////////////////////////////
181
04b80329 182}
13888096 183
04b80329 184AliITSTrackerV1::AliITSTrackerV1(const AliITSTrackerV1 &cobj) {
185//Origin A. Badala' and G.S. Pappalardo: e-mail Angela.Badala@ct.infn.it, Giuseppe.S.Pappalardo@ct.infn.it
186// copy constructor
13888096 187
cbcfa38d 188 *fITS = *cobj.fITS;
189 *fresult = *cobj.fresult;
190 fPtref = cobj.fPtref;
f66ae545 191 fChi2max = cobj.fChi2max;
cbcfa38d 192 **fvettid = **cobj.fvettid;
193 fflagvert = cobj.fflagvert;
194 Int_t imax=200,jmax=450;
195 frl = new AliITSRad(imax,jmax);
196 *frl = *cobj.frl;
197 fFieldFactor = cobj.fFieldFactor;
198 Int_t i,im1,im2,im2max;
199 for(i=0; i<6; i++) {
200 fNlad[i] = cobj.fNlad[i];
201 fNdet[i] = cobj.fNdet[i];
202 fAvrad[i] = cobj.fAvrad[i];
203 fDetx[i] = cobj.fDetx[i];
204 fDetz[i] = cobj.fDetz[i];
205 }
206 fzmin = new Double_t*[6]; fzmax = new Double_t*[6];
207 for(im1=0; im1<6; im1++) {
208 im2max=fNdet[im1];
209 fzmin[im1] = new Double_t[im2max]; fzmax[im1] = new Double_t[im2max];
210 }
211 fphimin = new Double_t*[6]; fphimax = new Double_t*[6];
212 for(im1=0;im1<6;im1++) {
213 im2max=fNlad[im1];
214 fphimin[im1] = new Double_t[im2max]; fphimax[im1] = new Double_t[im2max];
215 }
216
217 fphidet = new Double_t*[6];
218 for(im1=0; im1<6; im1++) {
219 im2max=fNlad[im1];
220 fphidet[im1] = new Double_t[im2max];
221 }
222 for(im1=0; im1<6; im1++) {
223 im2max=fNdet[im1];
224 for(im2=0; im2<im2max; im2++) {
225 fzmin[im1][im2]=cobj.fzmin[im1][im2];
226 fzmax[im1][im2]=cobj.fzmax[im1][im2];
227 }
228 }
229 for(im1=0; im1<6; im1++) {
230 im2max=fNlad[im1];
231 for(im2=0; im2<im2max; im2++) {
232 fphimin[im1][im2]=cobj.fphimin[im1][im2];
233 fphimax[im1][im2]=cobj.fphimax[im1][im2];
234 fphidet[im1][im2]=cobj.fphidet[im1][im2];
235 }
236 }
237}
238
239AliITSTrackerV1::~AliITSTrackerV1(){
240//Origin A. Badala' and G.S. Pappalardo: e-mail Angela.Badala@ct.infn.it, Giuseppe.S.Pappalardo@ct.infn.it
241// class destructor
242
243 //cout<<" CpuTimeKalman = "<<fTimerKalman->CpuTime()<<"\n";
244 //cout<<" CpuTimeIntersection = "<<fTimerIntersection->CpuTime()<<"\n";
245 //cout<<" CpuTimeIntersection = "<<TStopwatch::GetCPUTime()<<"\n";
246 //delete fTimerKalman;
247 //delete fTimerIntersection;
13888096 248
249}
250
cbcfa38d 251
04b80329 252AliITSTrackerV1 &AliITSTrackerV1::operator=(AliITSTrackerV1 obj) {
253//Origin A. Badala' and G.S. Pappalardo: e-mail Angela.Badala@ct.infn.it, Giuseppe.S.Pappalardo@ct.infn.it
254// assignement operator
13888096 255
cbcfa38d 256 *fITS = *obj.fITS;
257 *fresult = *obj.fresult;
258 fPtref = obj.fPtref;
f66ae545 259 fChi2max = obj.fChi2max;
cbcfa38d 260 **fvettid = **obj.fvettid;
261 fflagvert = obj.fflagvert;
262 Int_t imax=200,jmax=450;
263 frl = new AliITSRad(imax,jmax);
264 *frl = *obj.frl;
265 fFieldFactor = obj.fFieldFactor;
266 Int_t i;
267 for(i=0; i<6; i++) {
268 fNlad[i] = obj.fNlad[i];
269 fNdet[i] = obj.fNdet[i];
270 fAvrad[i] = obj.fAvrad[i];
271 fDetx[i] = obj.fDetx[i];
272 fDetz[i] = obj.fDetz[i];
273 }
274 fzmin = new Double_t*[6]; fzmax = new Double_t*[6];
275 Int_t im1, im2, im2max;
276 for(im1=0; im1<6; im1++) {
277 im2max=fNdet[im1];
278 fzmin[im1] = new Double_t[im2max]; fzmax[im1] = new Double_t[im2max];
279 }
280 fphimin = new Double_t*[6]; fphimax = new Double_t*[6];
281 for(im1=0;im1<6;im1++) {
282 im2max=fNlad[im1];
283 fphimin[im1] = new Double_t[im2max]; fphimax[im1] = new Double_t[im2max];
284 }
285
286 fphidet = new Double_t*[6];
287 for(im1=0; im1<6; im1++) {
288 im2max=fNlad[im1];
289 fphidet[im1] = new Double_t[im2max];
290 }
291 for(im1=0; im1<6; im1++) {
292 im2max=fNdet[im1];
293 for(im2=0; im2<im2max; im2++) {
294 fzmin[im1][im2]=obj.fzmin[im1][im2];
295 fzmax[im1][im2]=obj.fzmax[im1][im2];
296 }
297 }
298 for(im1=0; im1<6; im1++) {
299 im2max=fNlad[im1];
300 for(im2=0; im2<im2max; im2++) {
301 fphimin[im1][im2]=obj.fphimin[im1][im2];
302 fphimax[im1][im2]=obj.fphimax[im1][im2];
303 fphidet[im1][im2]=obj.fphidet[im1][im2];
304 }
305 }
13888096 306
04b80329 307 return *this;
308
309}
13888096 310
311
04b80329 312//________________________________________________________________
13888096 313
13888096 314
04b80329 315void AliITSTrackerV1::DoTracking(Int_t evNumber, Int_t minTr, Int_t maxTr, TFile *file) {
316//Origin A. Badala' and G.S. Pappalardo: e-mail Angela.Badala@ct.infn.it, Giuseppe.S.Pappalardo@ct.infn.it
317//The method needs the event number, the minimum and maximum order number of TPC tracks that
318//are to be tracked trough the ITS, and the file where the recpoints are registered.
319//The method can be called by a macro. It preforms the tracking for all good TPC tracks
583731c7 320
583731c7 321
13888096 322 printf("begin DoTracking - file %p\n",file);
13888096 323
0983ac5b 324 gAlice->GetEvent(evNumber); //modificato per gestire hbt
13888096 325
a3894645 326 AliKalmanTrack *kkprov;
327 kkprov->SetConvConst(100/0.299792458/0.2/fFieldFactor);
13888096 328
04b80329 329
13888096 330 TFile *cf=TFile::Open("AliTPCclusters.root");
331 AliTPCParam *digp= (AliTPCParam*)cf->Get("75x40_100x60");
332 if (!digp) { cerr<<"TPC parameters have not been found !\n"; getchar();}
333
0983ac5b 334 cf->cd();
335 AliTPCtracker *tracker = new AliTPCtracker(digp,evNumber);
04b80329 336
13888096 337 // Load clusters
338 tracker->LoadInnerSectors();
339 tracker->LoadOuterSectors();
340
13888096 341
342// Load tracks
0983ac5b 343 TFile *tf=TFile::Open("AliTPCtracksSorted.root"); //modificato per hbt
344 if (!tf->IsOpen()) {cerr<<"Can't open AliTPCtracksSorted.root !\n"; return ;}
13888096 345 TObjArray tracks(200000);
f66ae545 346 char tname[100];
347 sprintf(tname,"TreeT_TPC_%d",evNumber);
0983ac5b 348
f66ae545 349 TTree *tracktree=(TTree*)tf->Get(tname);
13888096 350 if (!tracktree) {cerr<<"Can't get a tree with TPC tracks !\n";}
351 TBranch *tbranch=tracktree->GetBranch("tracks");
352 Int_t nentr=(Int_t)tracktree->GetEntries();
353 Int_t kk;
04b80329 354
355 AliTPCtrack *ioTrackTPC=0;
13888096 356 for (kk=0; kk<nentr; kk++) {
04b80329 357 ioTrackTPC=new AliTPCtrack;
358 tbranch->SetAddress(&ioTrackTPC);
13888096 359 tracktree->GetEvent(kk);
04b80329 360 tracker->CookLabel(ioTrackTPC,0.1);
361 tracks.AddLast(ioTrackTPC);
13888096 362 }
363 delete tracker;
364 tf->Close();
365
366
367 Int_t nt = tracks.GetEntriesFast();
368 cerr<<"Number of found tracks "<<nt<<endl;
369
13888096 370
371 TVector vec(5);
04b80329 372 TTree *tr=gAlice->TreeR();
373 Int_t nent=(Int_t)tr->GetEntries();
0983ac5b 374 frecPoints = fITS->RecPoints();
13888096 375
376 Int_t numbpoints;
377 Int_t totalpoints=0;
378 Int_t *np = new Int_t[nent];
04b80329 379 fvettid = new Int_t* [nent];
13888096 380 Int_t mod;
381
382 for (mod=0; mod<nent; mod++) {
04b80329 383 fvettid[mod]=0;
f66ae545 384 fITS->ResetRecPoints();
385 gAlice->TreeR()->GetEvent(mod);
04b80329 386 numbpoints = frecPoints->GetEntries();
13888096 387 totalpoints+=numbpoints;
388 np[mod] = numbpoints;
389 //cout<<" mod = "<<mod<<" numbpoints = "<<numbpoints<<"\n"; getchar();
04b80329 390 fvettid[mod] = new Int_t[numbpoints];
13888096 391 Int_t ii;
04b80329 392 for (ii=0;ii<numbpoints; ii++) *(fvettid[mod]+ii)=0;
13888096 393 }
394
cbcfa38d 395 AliTPCtrack *track=0;
13888096 396
397
04b80329 398 if(minTr < 0) {minTr = 0; maxTr = nt-1;}
13888096 399
0983ac5b 400 TVector vgeant(3);
401
13888096 402
403 TTree tracktree1("TreeT","Tree with ITS tracks");
04b80329 404 AliITSIOTrack *ioTrack=0;
405 tracktree1.Branch("ITStracks","AliITSIOTrack",&ioTrack,32000,0);
13888096 406
04b80329 407
13888096 408 Int_t j;
04b80329 409 for (j=minTr; j<=maxTr; j++) {
13888096 410 track=(AliTPCtrack*)tracks.UncheckedAt(j);
13888096 411 if (!track) continue;
f66ae545 412
0983ac5b 413
04b80329 414 ////// propagation to the end of TPC //////////////
13888096 415 Double_t xk=77.415;
416 track->PropagateTo(xk, 28.94, 1.204e-3); //Ne
417 xk -=0.01;
418 track->PropagateTo(xk, 44.77, 1.71); //Tedlar
419 xk -=0.04;
04b80329 420 track->PropagateTo(xk, 44.86, 1.45); //kevlar
13888096 421 xk -=2.0;
422 track->PropagateTo(xk, 41.28, 0.029); //Nomex
423 xk-=16;
424 track->PropagateTo(xk,36.2,1.98e-3); //C02
425 xk -=0.01;
426 track->PropagateTo(xk, 24.01, 2.7); //Al
427 xk -=0.01;
428 track->PropagateTo(xk, 44.77, 1.71); //Tedlar
429 xk -=0.04;
04b80329 430 track->PropagateTo(xk, 44.86, 1.45); //kevlar
13888096 431 xk -=0.5;
432 track->PropagateTo(xk, 41.28, 0.029); //Nomex
433
04b80329 434 ///////////////////////////////////////////////////////////////
13888096 435
04b80329 436
437 AliITSTrackV1 trackITS(*track);
438
f66ae545 439 if(fresult){ delete fresult; fresult=0;}
04b80329 440 fresult = new AliITSTrackV1(trackITS);
441
442 AliITSTrackV1 primaryTrack(trackITS);
0983ac5b 443
444 vgeant=(*fresult).GetVertex();
445
13888096 446
04b80329 447 // Definition of dv and zv for vertex constraint
13888096 448 Double_t sigmaDv=0.0050; Double_t sigmaZv=0.010;
449 //Double_t sigmaDv=0.0015; Double_t sigmaZv=0.0015;
450 Double_t uniform= gRandom->Uniform();
451 Double_t signdv;
452 if(uniform<=0.5) signdv=-1.;
453 else
454 signdv=1.;
455
04b80329 456 Double_t vr=TMath::Sqrt(vgeant(0)*vgeant(0)+ vgeant(1)*vgeant(1));
457 Double_t dv=gRandom->Gaus(signdv*vr,(Float_t)sigmaDv);
458 Double_t zv=gRandom->Gaus(vgeant(2),(Float_t)sigmaZv);
13888096 459
04b80329 460 //cout<<" Dv e Zv = "<<dv<<" "<<zv<<"\n";
461 trackITS.SetDv(dv); trackITS.SetZv(zv);
13888096 462 trackITS.SetsigmaDv(sigmaDv); trackITS.SetsigmaZv(sigmaZv);
04b80329 463 (*fresult).SetDv(dv); (*fresult).SetZv(zv);
464 (*fresult).SetsigmaDv(sigmaDv); (*fresult).SetsigmaZv(sigmaZv);
465 primaryTrack.SetDv(dv); primaryTrack.SetZv(zv);
466 primaryTrack.SetsigmaDv(sigmaDv); primaryTrack.SetsigmaZv(sigmaZv);
13888096 467
04b80329 468 primaryTrack.PrimaryTrack(frl);
469 TVector d2=primaryTrack.Getd2();
470 TVector tgl2=primaryTrack.Gettgl2();
471 TVector dtgl=primaryTrack.Getdtgl();
13888096 472 trackITS.Setd2(d2); trackITS.Settgl2(tgl2); trackITS.Setdtgl(dtgl);
04b80329 473 (*fresult).Setd2(d2); (*fresult).Settgl2(tgl2); (*fresult).Setdtgl(dtgl);
13888096 474 /*
475 trackITS.SetVertex(vertex); trackITS.SetErrorVertex(ervertex);
04b80329 476 (*result).SetVertex(vertex); (*result).SetErrorVertex(ervertex);
13888096 477 */
04b80329 478
479
480 TList *list= new TList();
481
482 list->AddLast(&trackITS);
483
484 fPtref=TMath::Abs( (trackITS).GetPt() );
0983ac5b 485
f66ae545 486 if(fPtref>1.0) fChi2max=40.;
70a9314b 487 if(fPtref<=1.0) fChi2max=20.;
0983ac5b 488 if(fPtref<0.4 ) fChi2max=100.;
489 if(fPtref<0.2 ) fChi2max=40.;
490 // if(fPtref<0.4 ) fChi2max=30.;
491 // if(fPtref<0.2 ) fChi2max=20.;
492 //if(fPtref<0.2 ) fChi2max=10.;
493 //if(fPtref<0.1 ) fChi2max=5.;
494
f66ae545 495
0983ac5b 496 //cout << "\n Pt = " << fPtref <<"\n"; //stampa
f66ae545 497 RecursiveTracking(list);
04b80329 498 list->Delete();
499 delete list;
500
501 Int_t itot=-1;
502 TVector vecTotLabRef(18);
503 Int_t lay, k;
504 for(lay=5; lay>=0; lay--) {
505 TVector vecLabRef(3);
506 vecLabRef=(*fresult).GetLabTrack(lay);
507 Float_t clustZ=(*fresult).GetZclusterTrack( lay);
508 for(k=0; k<3; k++){
509 Int_t lpp=(Int_t)vecLabRef(k);
510 if(lpp>=0) {
511 TParticle *p=(TParticle*) gAlice->Particle(lpp);
512 Int_t pcode=p->GetPdgCode();
513 if(pcode==11) vecLabRef(k)=p->GetFirstMother();
514 }
515 itot++; vecTotLabRef(itot)=vecLabRef(k);
516 if(vecLabRef(k)==0. && clustZ == 0.) vecTotLabRef(itot) =-3.; }
517 }
518 Long_t labref;
519 Int_t freq;
520 (*fresult).Search(vecTotLabRef, labref, freq);
521
522
523 //if(freq < 6) labref=-labref; // cinque - sei
524 if(freq < 5) labref=-labref; // cinque - sei
525 (*fresult).SetLabel(labref);
526
13888096 527 // cout<<" progressive track number = "<<j<<"\r";
528 // cout<<j<<"\r";
04b80329 529 Int_t numOfCluster=(*fresult).GetNumClust();
0983ac5b 530 // cout<<" progressive track number = "<<j<<"\n"; // stampa
04b80329 531 Long_t labITS=(*fresult).GetLabel();
0983ac5b 532 //cout << " ITS track label = " << labITS << "\n"; // stampa
13888096 533 int lab=track->GetLabel();
0983ac5b 534 //cout << " TPC track label = " << lab <<"\n"; // stampa
13888096 535
536
537//propagation to vertex
538
539 Double_t rbeam=3.;
540
04b80329 541 (*fresult).Propagation(rbeam);
13888096 542
04b80329 543 Double_t c00,c10,c11,c20,c21,c22,c30,c31,c32,c33,c40,c41,c42,c43,c44;
544 (*fresult).GetCElements(c00,c10,c11,c20,c21,c22,c30,c31,c32,c33,c40,c41,c42,c43,c44);
13888096 545
04b80329 546 Double_t pt=TMath::Abs((*fresult).GetPt());
547 Double_t dr=(*fresult).GetD();
548 Double_t z=(*fresult).GetZ();
549 Double_t tgl=(*fresult).GetTgl();
550 Double_t c=(*fresult).GetC();
551 Double_t cy=c/2.;
552 Double_t dz=z-(tgl/cy)*TMath::ASin((*fresult).Arga(rbeam));
553 dz-=vgeant(2);
13888096 554
04b80329 555 // cout<<" dr e dz alla fine = "<<dr<<" "<<dz<<"\n"; getchar();
556 Double_t phi=(*fresult).Getphi();
557 Double_t phivertex = phi - TMath::ASin((*fresult).ArgA(rbeam));
13888096 558 Double_t duepi=2.*TMath::Pi();
559 if(phivertex>duepi) phivertex-=duepi;
560 if(phivertex<0.) phivertex+=duepi;
13888096 561
562//////////////////////////////////////////////////////////////////////////////////////////
563
564 Int_t idmodule,idpoint;
04b80329 565 if(numOfCluster >=5) { // cinque - sei
566 //if(numOfCluster ==6) { // cinque - sei
13888096 567
568
04b80329 569 AliITSIOTrack outTrack;
13888096 570
04b80329 571 ioTrack=&outTrack;
13888096 572
04b80329 573 ioTrack->SetStatePhi(phi);
574 ioTrack->SetStateZ(z);
575 ioTrack->SetStateD(dr);
576 ioTrack->SetStateTgl(tgl);
577 ioTrack->SetStateC(c);
578 Double_t radius=(*fresult).Getrtrack();
579 ioTrack->SetRadius(radius);
13888096 580 Int_t charge;
04b80329 581 if(c>0.) charge=-1; else charge=1;
582 ioTrack->SetCharge(charge);
13888096 583
584
585
04b80329 586 ioTrack->SetCovMatrix(c00,c10,c11,c20,c21,c22,c30,c31,c32,c33,c40,c41,c42,c43,c44);
13888096 587
588 Double_t px=pt*TMath::Cos(phivertex);
589 Double_t py=pt*TMath::Sin(phivertex);
590 Double_t pz=pt*tgl;
591
04b80329 592 Double_t xtrack=dr*TMath::Sin(phivertex);
593 Double_t ytrack=dr*TMath::Cos(phivertex);
594 Double_t ztrack=dz+vgeant(2);
595
596
597 ioTrack->SetPx(px);
598 ioTrack->SetPy(py);
599 ioTrack->SetPz(pz);
600 ioTrack->SetX(xtrack);
601 ioTrack->SetY(ytrack);
602 ioTrack->SetZ(ztrack);
603 ioTrack->SetLabel(labITS);
0983ac5b 604 ioTrack->SetTPCLabel(lab);
13888096 605
606 Int_t il;
607 for(il=0;il<6; il++){
04b80329 608 ioTrack->SetIdPoint(il,(*fresult).GetIdPoint(il));
609 ioTrack->SetIdModule(il,(*fresult).GetIdModule(il));
13888096 610 }
611 tracktree1.Fill();
612
613 //cout<<" labITS = "<<labITS<<"\n";
04b80329 614 //cout<<" phi z dr tgl c = "<<phi<<" "<<z<<" "<<dr<<" "<<tgl<<" "<<c<<"\n"; getchar();
13888096 615
13888096 616 for (il=0;il<6;il++) {
04b80329 617 idpoint=(*fresult).GetIdPoint(il);
618 idmodule=(*fresult).GetIdModule(il);
619 *(fvettid[idmodule]+idpoint)=1;
620 ioTrack->SetIdPoint(il,idpoint);
621 ioTrack->SetIdModule(il,idmodule);
13888096 622 }
f66ae545 623
13888096 624
04b80329 625 } // end if on numOfCluster
13888096 626 //gObjectTable->Print(); // stampa memoria
04b80329 627 } // end for (int j=minTr; j<=maxTr; j++)
f66ae545 628
13888096 629 static Bool_t first=kTRUE;
630 static TFile *tfile;
631
632 if(first) {
633 tfile=new TFile("itstracks.root","RECREATE");
634 //cout<<"I have opened itstracks.root file "<<endl;
635 }
636 first=kFALSE;
637 tfile->cd();
638 tfile->ls();
639
640 char hname[30];
641 sprintf(hname,"TreeT%d",evNumber);
642
643 tracktree1.Write(hname);
644
645
646
647 TTree *fAli=gAlice->TreeK();
648 TFile *fileAli=0;
649
650 if (fAli) fileAli =fAli->GetCurrentFile();
651 fileAli->cd();
652
653 ////////////////////////////////////////////////////////////////////////////////////////////////
654
655 printf("delete vectors\n");
656 if(np) delete [] np;
04b80329 657 if(fvettid) delete [] fvettid;
f66ae545 658 if(fresult) {delete fresult; fresult=0;}
659
04b80329 660}
661
662
663
664void AliITSTrackerV1::RecursiveTracking(TList *trackITSlist) {
665
666/////////////////////// This function perform the recursive tracking in ITS detectors /////////////////////
667/////////////////////// reference is a pointer to the final best track /////////////////////
668//Origin A. Badala' and G.S. Pappalardo: e-mail Angela.Badala@ct.infn.it, Giuseppe.S.Pappalardo@ct.infn.it
669// The authors thank Mariana Bondila to have help them to resolve some problems. July-2000
670
671 //Rlayer[0]=4.; Rlayer[1]=7.; Rlayer[2]=14.9; Rlayer[3]=23.8; Rlayer[4]=39.1; Rlayer[5]=43.6; //vecchio
f66ae545 672
673 //////////////////////
674 Float_t sigmaphil[6], sigmazl[6];
675 sigmaphil[0]=1.44e-6/(fAvrad[0]*fAvrad[0]);
676 sigmaphil[1]=1.44e-6/(fAvrad[1]*fAvrad[1]);
677 sigmaphil[2]=1.444e-5/(fAvrad[2]*fAvrad[2]);
678 sigmaphil[3]=1.444e-5/(fAvrad[3]*fAvrad[3]);
679 sigmaphil[4]=4e-6/(fAvrad[4]*fAvrad[4]);
680 sigmaphil[5]=4e-6/(fAvrad[5]*fAvrad[5]);
681
682 sigmazl[0]=1e-2;
683 sigmazl[1]=1e-2;
684 sigmazl[2]=7.84e-4;
685 sigmazl[3]=7.84e-4;
686 sigmazl[4]=0.6889;
687 sigmazl[5]=0.6889;
688 ///////////////////////////////////////////////////////////
689
04b80329 690
70a9314b 691 Int_t index;
f66ae545 692 AliITSgeom *g1 = fITS->GetITSgeom();
693 AliITSRecPoint *recp;
04b80329 694 for(index =0; index<trackITSlist->GetSize(); index++) {
695 AliITSTrackV1 *trackITS = (AliITSTrackV1 *) trackITSlist->At(index);
696
697 if((*trackITS).GetLayer()==7) fresult->SetChi2(10.223e140);
698 // cout <<" Layer inizio = "<<(*trackITS).GetLayer()<<"\n";
699 // cout<<"fvtrack =" <<"\n";
700 // cout << (*trackITS)(0) << " "<<(*trackITS)(1)<<" "<<(*trackITS)(2)<<" "<<(*trackITS)(3)<<" "<<(*trackITS)(4)<<"\n";
701 // cout<< " rtrack = "<<(*trackITS).Getrtrack()<<"\n";
702 // cout<< " Pt = "<<(*trackITS).GetPt()<<"\n";
703 // getchar();
704 Double_t chi2Now, chi2Ref;
70a9314b 705 Float_t numClustRef = fresult->GetNumClust();
04b80329 706 if((*trackITS).GetLayer()==1 ) {
707 chi2Now = trackITS->GetChi2();
708 Float_t numClustNow = trackITS->GetNumClust();
709 if(trackITS->GetNumClust()) chi2Now /= (Double_t )trackITS->GetNumClust();
0983ac5b 710 chi2Ref = fresult->GetChi2();
711
04b80329 712 if(fresult->GetNumClust()) chi2Ref /= (Double_t )fresult->GetNumClust();
713 //cout<<" chi2Now and chi2Ref = "<<chi2Now<<" "<<chi2Ref<<"\n";
714 if( numClustNow > numClustRef ) {*fresult = *trackITS;}
715 if((numClustNow == numClustRef )&& (chi2Now < chi2Ref)) {*fresult = *trackITS;}
716 continue;
717 }
0983ac5b 718
f66ae545 719 if(trackITS->Getfnoclust()>=2) continue;
04b80329 720 Float_t numClustNow = trackITS->GetNumClust();
721 if(numClustNow) {
722 chi2Now = trackITS->GetChi2();
0983ac5b 723
724
725 if(numClustNow<numClustRef && chi2Now>fresult->GetChi2()) continue;
726
f66ae545 727 //cout<<" chi2Now = "<<chi2Now<<"\n";
0983ac5b 728 // commentato il 30-7-2001
729 chi2Now/=numClustNow;
04b80329 730 if(fPtref > 1.0 && chi2Now > 30.) continue;
731 if((fPtref >= 0.6 && fPtref<=1.0) && chi2Now > 40.) continue;
0983ac5b 732 // if((fPtref <= 0.6 && fPtref>0.2)&& chi2Now > 40.) continue;
733 // if(fPtref <= 0.2 && chi2Now > 8.) continue;
f66ae545 734 if((fPtref <= 0.6 && fPtref>0.2)&& chi2Now > 30.) continue;
735 if(fPtref <= 0.2 && chi2Now > 7.) continue;
0983ac5b 736
737
738 /////////////////////////////
739
04b80329 740 }
741
742 Int_t layerInit = (*trackITS).GetLayer();
743 Int_t layernew = layerInit - 2; // -1 for new layer, -1 for matrix index
04b80329 744
745 TList listoftrack;
746 Int_t ladp, ladm, detp,detm,ladinters,detinters;
747 Int_t layerfin=layerInit-1;
04b80329 748 // cout<<"Prima di intersection \n";
cbcfa38d 749
750 //if(!fTimerIntersection) fTimerIntersection = new TStopwatch(); // timer
751 //fTimerIntersection->Continue(); // timer
752 Int_t outinters=Intersection(*trackITS, layerfin, ladinters, detinters);
753 //fTimerIntersection->Stop(); // timer
04b80329 754
755 // cout<<" outinters = "<<outinters<<"\n";
756 // cout<<" Layer ladder detector intersection ="<<layerfin<<" "<<ladinters<<" "<<detinters<<"\n";
757 // cout << " phiinters zinters = "<<(*trackITS)(0) << " "<<(*trackITS)(1)<<"\n"; getchar();
758
759 if(outinters==-1) continue;
760
761 Int_t flaghit=0;
762 if(outinters==0){
763 TVector toucLad(9), toucDet(9);
764 Int_t lycur=layerfin;
765 ladp=ladinters+1;
766 ladm=ladinters-1;
767 if(ladm <= 0) ladm=fNlad[layerfin-1];
768 if(ladp > fNlad[layerfin-1]) ladp=1;
769 detp=detinters+1;
770 detm=detinters-1;
771 Int_t idetot=1;
f66ae545 772 /*
04b80329 773 toucLad(0)=ladinters; toucLad(1)=ladm; toucLad(2)=ladp;
774 toucLad(3)=ladinters; toucLad(4)=ladm; toucLad(5)=ladp;
775 toucLad(6)=ladinters; toucLad(7)=ladm; toucLad(8)=ladp;
776 toucDet(0)=detinters; toucDet(1)=detinters; toucDet(2)=detinters;
777 if(detm > 0 && detp <= fNdet[layerfin-1]) {
778 idetot=9;
779 toucDet(3)=detm; toucDet(4)=detm; toucDet(5)=detm;
780 toucDet(6)=detp; toucDet(7)=detp; toucDet(8)=detp;
781 }
782
783 if(detm > 0 && detp > fNdet[layerfin-1]) {
784 idetot=6;
785 toucDet(3)=detm; toucDet(4)=detm; toucDet(5)=detm;
786 }
787
788 if(detm <= 0 && detp <= fNdet[layerfin-1]) {
789 idetot=6;
790 toucDet(3)=detp; toucDet(4)=detp; toucDet(5)=detp;
791 }
f66ae545 792 */
793 Float_t epsphi=5.0, epsz=5.0;
794 if(fPtref<0.2) {epsphi=3.; epsz=3.;}
795 ////////////////////////////////////////////////////////////////////////////
796//// nuova definizione idetot e toucLad e toucDet to be transformed in a method
797// these values could be modified
798 Float_t pigre=TMath::Pi();
799 Float_t rangephi=5., rangez=5.;
800 if(layerfin==1 || layerfin ==2){
801 rangephi=40.*epsphi*TMath::Sqrt(sigmaphil[layerfin-1]+(*trackITS).GetSigmaphi());
802 rangez = 40.*epsz*TMath::Sqrt(sigmazl[layerfin-1]+(*trackITS).GetSigmaZ());
803 }
804 if(layerfin==3 || layerfin ==4){
805 //rangephi=30.*fepsphi*TMath::Sqrt(sigmaphil[layerfin-1]+(*trackITS).GetSigmaphi());
806 //rangez = 40.*fepsz*TMath::Sqrt(sigmazl[layerfin-1]+(*trackITS).GetSigmaZ());
807 rangephi=40.*epsphi*TMath::Sqrt(sigmaphil[layerfin-1]+(*trackITS).GetSigmaphi());
808 rangez = 50.*epsz*TMath::Sqrt(sigmazl[layerfin-1]+(*trackITS).GetSigmaZ());
809 }
810 if(layerfin==5 || layerfin ==6){
811 rangephi=20.*epsphi*TMath::Sqrt(sigmaphil[layerfin-1]+(*trackITS).GetSigmaphi());
812 rangez =5.*epsz*TMath::Sqrt(sigmazl[layerfin-1]+(*trackITS).GetSigmaZ());
813 }
814 Float_t phinters, zinters;
815 phinters=(*trackITS).Getphi();
816 zinters=(*trackITS).GetZ();
817 Float_t distz;
818 Float_t phicm, phicp, distphim, distphip;
819 phicm=phinters;
820 if(phinters>fphimax[layerfin-1][ladm]) phicm=phinters-2*pigre;
821 distphim=TMath::Abs(phicm-fphimax[layerfin-1][ladm]);
822 phicp=phinters;
823 if(phinters>fphimin[layerfin-1][ladp]) phicp=phinters-2.*pigre;
824 distphip=TMath::Abs(phicp-fphimin[layerfin-1][ladp]);
825 Int_t flagzmin=0;
826 Int_t flagzmax=0;
827 idetot=1;
828 toucLad(0)=ladinters; toucDet(0)=detinters;
829 if(detm>0) distz=TMath::Abs(zinters-fzmax[layerfin-1][detm-1]);
830 if(detm>0 && rangez>=distz){
831 flagzmin=1;
832 idetot++; toucLad(idetot-1)=ladinters; toucDet(idetot-1)=detm;
833 if(rangephi>=distphim){
834 idetot++; toucLad(idetot-1)=ladm; toucDet(idetot-1)=detinters;
835 idetot++; toucLad(idetot-1)=ladm; toucDet(idetot-1)=detm;
836 }
837 if(rangephi>=distphip){
838 idetot++; toucLad(idetot-1)=ladp; toucDet(idetot-1)=detinters;
839 idetot++; toucLad(idetot-1)=ladp; toucDet(idetot-1)=detm;
840 }
841 } //end detm>0....
842 if(detp<=fNdet[layerfin-1]) distz=TMath::Abs(zinters-fzmin[layerfin-1][detp-1]);
843 if(detp<=fNdet[layerfin-1] && rangez>=distz){
844 flagzmax=1;
845 idetot++; toucLad(idetot-1)=ladinters; toucDet(idetot-1)=detp;
846 if(rangephi>=distphim){
847 idetot++; toucLad(idetot-1)=ladm; toucDet(idetot-1)=detp;
848 if(flagzmin == 0) {idetot++; toucLad(idetot-1)=ladm; toucDet(idetot-1)=detinters;}
849 }
850 if(rangephi>=distphip){
851 idetot++; toucLad(idetot-1)=ladp; toucDet(idetot-1)=detp;
852 if(flagzmin == 0) {idetot++; toucLad(idetot-1)=ladp; toucDet(idetot-1)=detinters;}
853 }
854 } //end detm<fNdet[.......
855
856
857 if(flagzmin == 0 && flagzmax==0){
858 if(rangephi>=distphim){idetot++; toucLad(idetot-1)=ladm; toucDet(idetot-1)=detinters;}
859 if(rangephi>=distphip){idetot++; toucLad(idetot-1)=ladp; toucDet(idetot-1)=detinters;}
860 }
861
862///////////////////////////////////////////////////////////////////////////////////////////////////
863
864
0983ac5b 865 Int_t iriv;
04b80329 866 for (iriv=0; iriv<idetot; iriv++) { //for on detectors
04b80329 867
868 ////////////////////////////////////////////////////////////////////////////////////////////////
869
870 /*** Rec points sorted by module *****/
871 /**************************************/
872
f66ae545 873 Int_t indexmod; //mod ott
874 // AliITSRecPoint *recp;
875 indexmod = g1->GetModuleIndex(lycur,toucLad(iriv),toucDet(iriv));
876 //mod ott
70a9314b 877 fITS->ResetRecPoints();
f66ae545 878 gAlice->TreeR()->GetEvent(indexmod);
04b80329 879 Int_t npoints=frecPoints->GetEntries();
f66ae545 880 /* mod ott
0983ac5b 881 Int_t *indlist=new Int_t[npoints+1];
04b80329 882 Int_t counter=0;
883 Int_t ind;
884 for (ind=0; ind<=npoints; ind++) {
885 indlist[ind]=-1;
886 if (*(fvettid[index]+ind)==0) {
887 indlist[counter]=ind;
888 counter++;
889 }
890 }
891
892 ind=-1;
893
894 for(;;) {
895 ind++;
896 if(indlist[ind] < 0) recp=0;
897 else recp = (AliITSRecPoint*)frecPoints->UncheckedAt(indlist[ind]);
898
f66ae545 899 if((!recp) ) break;
900 */
901/////////////////////////new
902 Int_t indnew;
903 for(indnew=0; indnew<npoints; indnew++){
904 if (*(fvettid[indexmod]+indnew)==0)
905 recp =(AliITSRecPoint*)frecPoints->UncheckedAt(indnew);
906 else
907 continue;
908
909///////////////////////////////////////////////////////////////////////
04b80329 910 TVector cluster(3),vecclust(9);
911 vecclust(6)=vecclust(7)=vecclust(8)=-1.;
912 Double_t sigma[2];
913 // set veclust in global
914 Float_t global[3], local[3];
915 local[0]=recp->GetX();
916 local[1]=0.;
917 local[2]= recp->GetZ();
04b80329 918 Int_t play = lycur;
919 Int_t plad = TMath::Nint(toucLad(iriv));
0983ac5b 920 Int_t pdet = TMath::Nint(toucDet(iriv));
04b80329 921 g1->LtoG(play,plad,pdet,local,global);
922
923 vecclust(0)=global[0];
924 vecclust(1)=global[1];
925 vecclust(2)=global[2];
926
927
f66ae545 928 vecclust(3) = (Float_t)recp->fTracks[0];
929 //vecclust(4) = (Float_t)indlist[ind];
930 vecclust(4) = (Float_t)indnew;
931 vecclust(5) = (Float_t)indexmod; //mod ott
932 vecclust(6) = (Float_t)recp->fTracks[0];
933 vecclust(7) = (Float_t)recp->fTracks[1];
934 vecclust(8) = (Float_t)recp->fTracks[2];
04b80329 935
936 sigma[0] = (Double_t) recp->GetSigmaX2();
70a9314b 937 sigma[1] = (Double_t) recp->GetSigmaZ2();
04b80329 938
939 //now we are in r,phi,z in global
940 cluster(0) = TMath::Sqrt(vecclust(0)*vecclust(0)+vecclust(1)*vecclust(1));//r hit
70a9314b 941 cluster(1) = TMath::ATan2(vecclust(1),vecclust(0)); if(cluster(1)<0.) cluster(1)+=2.*TMath::Pi();
04b80329 942 cluster(2) = vecclust(2); // z hit
943
0983ac5b 944 // cout<<" layer = "<<play<<"\n";
945 // cout<<" cluster prima = "<<vecclust(0)<<" "<<vecclust(1)<<" "
946 // <<vecclust(2)<<"\n"; getchar();
f66ae545 947
04b80329 948 Float_t sigmatotphi, sigmatotz;
949
f66ae545 950 // Float_t epsphi=5.0, epsz=5.0;
951 //if(fPtref<0.2) {epsphi=3.; epsz=3.;}
04b80329 952
953 Double_t rTrack=(*trackITS).Getrtrack();
0983ac5b 954 Double_t sigmaphi=sigma[0]/(rTrack*rTrack);
955 sigmatotphi=epsphi*TMath::Sqrt(sigmaphi + (*trackITS).GetSigmaphi());
04b80329 956
0983ac5b 957 sigmatotz=epsz*TMath::Sqrt(sigma[1] + (*trackITS).GetSigmaZ());
04b80329 958 //cout<<"cluster e sigmatotphi e track = "<<cluster(0)<<" "<<cluster(1)<<" "<<sigmatotphi<<" "<<vecclust(3)<<"\n";
959 //if(vecclust(3)==481) getchar();
960 if(cluster(1)<6. && (*trackITS).Getphi()>6.) cluster(1)=cluster(1)+(2.*TMath::Pi());
961 if(cluster(1)>6. && (*trackITS).Getphi()<6.) cluster(1)=cluster(1)-(2.*TMath::Pi());
962 if(TMath::Abs(cluster(1)-(*trackITS).Getphi()) > sigmatotphi) continue;
963 // cout<<" supero sigmaphi \n";
964 AliITSTrackV1 *newTrack = new AliITSTrackV1((*trackITS));
965 (*newTrack).SetLayer((*trackITS).GetLayer()-1);
966
967 if (TMath::Abs(rTrack-cluster(0))/rTrack>1e-6)
968 (*newTrack).Correct(Double_t(cluster(0)));
969 //cout<<" cluster(2) e (*newTrack).GetZ() = "<<cluster(2)<<" "<< (*newTrack).GetZ()<<"\n";
970 if(TMath::Abs(cluster(2)-(*newTrack).GetZ()) > sigmatotz){
971 delete newTrack;
972 continue;}
70a9314b 973
974 Double_t sigmanew[2];
975 sigmanew[0]= sigmaphi;
976 sigmanew[1]=sigma[1];
977
978 Double_t m[2];
979 m[0]=cluster(1);
980 m[1]=cluster(2);
0983ac5b 981// Double_t chi2pred=newTrack->GetPredChi2(m,sigmanew);
70a9314b 982 // cout<<" chi2pred = "<<chi2pred<<"\n";
0983ac5b 983
984 // if(chi2pred>fChi2max) continue; //aggiunto il 30-7-2001
70a9314b 985
04b80329 986 if(iriv == 0) flaghit=1;
987
988 (*newTrack).AddMS(frl); // add the multiple scattering matrix to the covariance matrix
70a9314b 989 (*newTrack).AddEL(frl,1.,0);
04b80329 990
70a9314b 991
04b80329 992
cbcfa38d 993 //if(!fTimerKalman) fTimerKalman = new TStopwatch(); // timer
70a9314b 994 //fTimerKalman->Continue(); // timer
995
cbcfa38d 996 if(fflagvert){
f66ae545 997 KalmanFilterVert(newTrack,cluster,sigmanew);
998 // KalmanFilterVert(newTrack,cluster,sigmanew,chi2pred);
cbcfa38d 999 }
1000 else{
04b80329 1001 KalmanFilter(newTrack,cluster,sigmanew);
cbcfa38d 1002 }
1003 //fTimerKalman->Stop(); // timer
04b80329 1004
1005
1006 (*newTrack).PutCluster(layernew, vecclust);
1007 newTrack->AddClustInTrack();
1008
1009 listoftrack.AddLast(newTrack);
1010
0983ac5b 1011 } // end of for(;;) on rec points
1012
f66ae545 1013 // delete [] indlist; //mod ott
04b80329 1014
1015 } // end of for on detectors
1016
1017 }//end if(outinters==0)
1018
1019 if(flaghit==0 || outinters==-2) {
70a9314b 1020 AliITSTrackV1 *newTrack = new AliITSTrackV1(*trackITS);
0983ac5b 1021 (*newTrack).Setfnoclust();
04b80329 1022 (*newTrack).SetLayer((*trackITS).GetLayer()-1);
1023 (*newTrack).AddMS(frl); // add the multiple scattering matrix to the covariance matrix
1024 (*newTrack).AddEL(frl,1.,0);
1025
1026 listoftrack.AddLast(newTrack);
1027 }
1028
1029
1030 //gObjectTable->Print(); // stampa memoria
1031
1032 RecursiveTracking(&listoftrack);
1033 listoftrack.Delete();
1034 } // end of for on tracks
1035
1036 //gObjectTable->Print(); // stampa memoria
1037
1038}
1039
cbcfa38d 1040Int_t AliITSTrackerV1::Intersection(AliITSTrackV1 &track, Int_t layer, Int_t &ladder, Int_t &detector) {
04b80329 1041//Origin A. Badala' and G.S. Pappalardo: e-mail Angela.Badala@ct.infn.it, Giuseppe.S.Pappalardo@ct.infn.it
1042// Found the intersection and the detector
1043
cbcfa38d 1044 Double_t rk=fAvrad[layer-1];
04b80329 1045 if(track.DoNotCross(rk)){ /*cout<< " Do not cross \n";*/ return -1;}
1046 track.Propagation(rk);
1047 Double_t zinters=track.GetZ();
1048 Double_t phinters=track.Getphi();
1049 //cout<<"zinters = "<<zinters<<" phinters = "<<phinters<<"\n";
04b80329 1050
1051 TVector det(9);
1052 TVector listDet(2);
1053 TVector distZCenter(2);
04b80329 1054
1055 Int_t iz=0;
04b80329 1056 Int_t iD;
cbcfa38d 1057
04b80329 1058 for(iD = 1; iD<= fNdet[layer-1]; iD++) {
cbcfa38d 1059 if(zinters > fzmin[layer-1][iD-1] && zinters <= fzmax[layer-1][iD-1]) {
1060 if(iz>1) {
1061 cout<< " Errore su iz in Intersection \n"; getchar();
1062 }
04b80329 1063 else {
1064 listDet(iz)= iD; distZCenter(iz)=TMath::Abs(zinters-det(2)); iz++;
1065 }
1066 }
1067 }
13888096 1068
04b80329 1069 if(iz==0) {/* cout<< " No detector along Z \n";*/ return -2;}
1070 detector=Int_t (listDet(0));
1071 if(iz>1 && (distZCenter(0)>distZCenter(1))) detector=Int_t (listDet(1));
cbcfa38d 1072
04b80329 1073 TVector listLad(2);
1074 TVector distPhiCenter(2);
1075 Int_t ip=0;
1076 Double_t pigre=TMath::Pi();
1077
1078 Int_t iLd;
cbcfa38d 1079 for(iLd = 1; iLd<= fNlad[layer-1]; iLd++) {
1080 Double_t phimin=fphimin[layer-1][iLd-1];
1081 Double_t phimax=fphimax[layer-1][iLd-1];
1082 Double_t phidet=fphidet[layer-1][iLd-1];
1083 Double_t phiconfr=phinters;
0983ac5b 1084 if(phimin>phimax) {
1085 //if(phimin <5.5) {cout<<" Error in Intersection for phi \n"; getchar();}
70a9314b 1086 phimin-=(2.*pigre);
cbcfa38d 1087 if(phinters>(1.5*pigre)) phiconfr=phinters-(2.*pigre);
1088 if(phidet>(1.5*pigre)) phidet-=(2.*pigre);
04b80329 1089 }
cbcfa38d 1090 if(phiconfr>phimin && phiconfr<= phimax) {
1091 if(ip>1) {
1092 cout<< " Errore su ip in Intersection \n"; getchar();
1093 }
04b80329 1094 else {
1095 listLad(ip)= iLd; distPhiCenter(ip)=TMath::Abs(phiconfr-phidet); ip++;
1096 }
1097 }
1098 }
1099 if(ip==0) { cout<< " No detector along phi \n"; getchar();}
1100 ladder=Int_t (listLad(0));
cbcfa38d 1101 if(ip>1 && (distPhiCenter(0)>distPhiCenter(1))) ladder=Int_t (listLad(1));
04b80329 1102
1103 return 0;
13888096 1104}
04b80329 1105
04b80329 1106void AliITSTrackerV1::KalmanFilter(AliITSTrackV1 *newTrack,TVector &cluster,Double_t sigma[2]){
1107//Origin A. Badala' and G.S. Pappalardo: e-mail Angela.Badala@ct.infn.it, Giuseppe.S.Pappalardo@ct.infn.it
1108// Kalman filter without vertex constraint
1109
1110
1111 ////////////////////////////// Evaluation of the measurement vector /////////////////////////////////////
1112
1113 Double_t m[2];
1114 Double_t rk,phik,zk;
1115 rk=cluster(0); phik=cluster(1); zk=cluster(2);
1116 m[0]=phik; m[1]=zk;
1117
1118 ///////////////////////////////////// Evaluation of the error matrix V ///////////////////////////////
1119
1120 Double_t v00=sigma[0];
1121 Double_t v11=sigma[1];
1122
1123 ///////////////////////////////////////////////////////////////////////////////////////////
1124
1125
1126 Double_t cin00,cin10,cin20,cin30,cin40,cin11,cin21,cin31,cin41,cin22,cin32,cin42,cin33,cin43,cin44;
1127
1128 newTrack->GetCElements(cin00,cin10,cin11,cin20,cin21,cin22,cin30,cin31,cin32,cin33,cin40,
1129 cin41,cin42,cin43,cin44); //get C matrix
1130
1131 Double_t rold00=cin00+v00;
1132 Double_t rold10=cin10;
1133 Double_t rold11=cin11+v11;
1134
1135//////////////////////////////////// R matrix inversion ///////////////////////////////////////////////
1136
1137 Double_t det=rold00*rold11-rold10*rold10;
1138 Double_t r00=rold11/det;
1139 Double_t r10=-rold10/det;
1140 Double_t r11=rold00/det;
1141
1142////////////////////////////////////////////////////////////////////////////////////////////////////////
1143
1144 Double_t k00=cin00*r00+cin10*r10;
1145 Double_t k01=cin00*r10+cin10*r11;
1146 Double_t k10=cin10*r00+cin11*r10;
1147 Double_t k11=cin10*r10+cin11*r11;
1148 Double_t k20=cin20*r00+cin21*r10;
1149 Double_t k21=cin20*r10+cin21*r11;
1150 Double_t k30=cin30*r00+cin31*r10;
1151 Double_t k31=cin30*r10+cin31*r11;
1152 Double_t k40=cin40*r00+cin41*r10;
1153 Double_t k41=cin40*r10+cin41*r11;
1154
1155 Double_t x0,x1,x2,x3,x4;
1156 newTrack->GetXElements(x0,x1,x2,x3,x4); // get the state vector
1157
1158 Double_t savex0=x0, savex1=x1;
1159
1160 x0+=k00*(m[0]-savex0)+k01*(m[1]-savex1);
1161 x1+=k10*(m[0]-savex0)+k11*(m[1]-savex1);
1162 x2+=k20*(m[0]-savex0)+k21*(m[1]-savex1);
1163 x3+=k30*(m[0]-savex0)+k31*(m[1]-savex1);
1164 x4+=k40*(m[0]-savex0)+k41*(m[1]-savex1);
1165
1166 Double_t c00,c10,c20,c30,c40,c11,c21,c31,c41,c22,c32,c42,c33,c43,c44;
1167
1168 c00=cin00-k00*cin00-k01*cin10;
1169 c10=cin10-k00*cin10-k01*cin11;
1170 c20=cin20-k00*cin20-k01*cin21;
1171 c30=cin30-k00*cin30-k01*cin31;
1172 c40=cin40-k00*cin40-k01*cin41;
1173
1174 c11=cin11-k10*cin10-k11*cin11;
1175 c21=cin21-k10*cin20-k11*cin21;
1176 c31=cin31-k10*cin30-k11*cin31;
1177 c41=cin41-k10*cin40-k11*cin41;
1178
1179 c22=cin22-k20*cin20-k21*cin21;
1180 c32=cin32-k20*cin30-k21*cin31;
1181 c42=cin42-k20*cin40-k21*cin41;
1182
1183 c33=cin33-k30*cin30-k31*cin31;
1184 c43=cin43-k30*cin40-k31*cin41;
1185
1186 c44=cin44-k40*cin40-k41*cin41;
1187
1188 newTrack->PutXElements(x0,x1,x2,x3,x4); // put the new state vector
1189
1190 newTrack->PutCElements(c00,c10,c11,c20,c21,c22,c30,c31,c32,c33,c40,c41,c42,c43,c44); // put in track the
1191 // new cov matrix
1192 Double_t vmcold00=v00-c00;
1193 Double_t vmcold10=-c10;
1194 Double_t vmcold11=v11-c11;
1195
1196///////////////////////////////////// Matrix vmc inversion ////////////////////////////////////////////////
1197
1198 det=vmcold00*vmcold11-vmcold10*vmcold10;
1199 Double_t vmc00=vmcold11/det;
1200 Double_t vmc10=-vmcold10/det;
1201 Double_t vmc11=vmcold00/det;
1202
1203////////////////////////////////////////////////////////////////////////////////////////////////////////////
1204
1205 Double_t chi2=(m[0]-x0)*( vmc00*(m[0]-x0) + 2.*vmc10*(m[1]-x1) ) +
1206 (m[1]-x1)*vmc11*(m[1]-x1);
1207
1208 newTrack->SetChi2(newTrack->GetChi2()+chi2);
1209
1210}
1211
1212
70a9314b 1213//void AliITSTrackerV1::KalmanFilterVert(AliITSTrackV1 *newTrack,TVector &cluster,Double_t sigma[2]){
0983ac5b 1214void AliITSTrackerV1::KalmanFilterVert(AliITSTrackV1 *newTrack,TVector &cluster,Double_t sigma[2]/*, Double_t chi2pred*/){
04b80329 1215//Origin A. Badala' and G.S. Pappalardo: e-mail Angela.Badala@ct.infn.it, Giuseppe.S.Pappalardo@ct.infn.it
1216// Kalman filter with vertex constraint
1217
1218 ////////////////////////////// Evaluation of the measurement vector m ///////////////
1219
1220 Double_t m[4];
1221 Double_t rk,phik,zk;
1222 rk=cluster(0); phik=cluster(1); zk=cluster(2);
1223 m[0]=phik; m[1]=zk;
1224
1225 Double_t cc=(*newTrack).GetC();
1226 Double_t zv=(*newTrack).GetZv();
1227 Double_t dv=(*newTrack).GetDv();
1228 Double_t cy=cc/2.;
1229 Double_t tgl= (zk-zv)*cy/TMath::ASin(cy*rk);
1230 m[2]=dv; m[3]=tgl;
1231
1232 ///////////////////////////////////// Evaluation of the error matrix V //////////////
1233 Int_t layer=newTrack->GetLayer();
1234 Double_t v00=sigma[0];
1235 Double_t v11=sigma[1];
1236 Double_t v31=sigma[1]/rk;
1237 Double_t sigmaDv=newTrack->GetsigmaDv();
1238 Double_t v22=sigmaDv*sigmaDv + newTrack->Getd2(layer-1);
1239 Double_t v32=newTrack->Getdtgl(layer-1);
1240 Double_t sigmaZv=newTrack->GetsigmaZv();
1241 Double_t v33=(sigma[1]+sigmaZv*sigmaZv)/(rk*rk) + newTrack->Gettgl2(layer-1);
1242 ///////////////////////////////////////////////////////////////////////////////////////
1243
1244 Double_t cin00,cin10,cin11,cin20,cin21,cin22,cin30,cin31,cin32,cin33,cin40,cin41,cin42,cin43,cin44;
1245
1246 newTrack->GetCElements(cin00,cin10,cin11,cin20,cin21,cin22,cin30,cin31,cin32,cin33,cin40,
1247 cin41,cin42,cin43,cin44); //get C matrix
1248
1249 Double_t r[4][4];
1250 r[0][0]=cin00+v00;
1251 r[1][0]=cin10;
1252 r[2][0]=cin20;
1253 r[3][0]=cin30;
1254 r[1][1]=cin11+v11;
1255 r[2][1]=cin21;
1256 r[3][1]=cin31+sigma[1]/rk;
1257 r[2][2]=cin22+sigmaDv*sigmaDv+newTrack->Getd2(layer-1);
1258 r[3][2]=cin32+newTrack->Getdtgl(layer-1);
1259 r[3][3]=cin33+(sigma[1]+sigmaZv*sigmaZv)/(rk*rk) + newTrack->Gettgl2(layer-1);
1260
1261 r[0][1]=r[1][0]; r[0][2]=r[2][0]; r[0][3]=r[3][0]; r[1][2]=r[2][1]; r[1][3]=r[3][1];
1262 r[2][3]=r[3][2];
1263
1264///////////////////// Matrix R inversion ////////////////////////////////////////////
1265
1266 const Int_t kn=4;
1267 Double_t big, hold;
1268 Double_t d=1.;
1269 Int_t ll[kn],mm[kn];
1270
1271 Int_t i,j,k;
1272
1273 for(k=0; k<kn; k++) {
1274 ll[k]=k;
1275 mm[k]=k;
1276 big=r[k][k];
1277 for(j=k; j<kn ; j++) {
1278 for (i=j; i<kn; i++) {
1279 if(TMath::Abs(big) < TMath::Abs(r[i][j]) ) { big=r[i][j]; ll[k]=i; mm[k]=j; }
1280 }
1281 }
1282//
1283 j= ll[k];
1284 if(j > k) {
1285 for(i=0; i<kn; i++) { hold=-r[k][i]; r[k][i]=r[j][i]; r[j][i]=hold; }
1286
1287 }
1288//
1289 i=mm[k];
1290 if(i > k ) {
1291 for(j=0; j<kn; j++) { hold=-r[j][k]; r[j][k]=r[j][i]; r[j][i]=hold; }
1292 }
1293//
1294 if(!big) {
1295 d=0.;
1296 cout << "Singular matrix\n";
1297 }
1298 for(i=0; i<kn; i++) {
1299 if(i == k) { continue; }
1300 r[i][k]=r[i][k]/(-big);
1301 }
1302//
1303 for(i=0; i<kn; i++) {
1304 hold=r[i][k];
1305 for(j=0; j<kn; j++) {
1306 if(i == k || j == k) { continue; }
1307 r[i][j]=hold*r[k][j]+r[i][j];
1308 }
1309 }
1310//
1311 for(j=0; j<kn; j++) {
1312 if(j == k) { continue; }
1313 r[k][j]=r[k][j]/big;
1314 }
1315//
1316 d=d*big;
1317//
1318 r[k][k]=1./big;
1319 }
1320//
1321 for(k=kn-1; k>=0; k--) {
1322 i=ll[k];
1323 if(i > k) {
1324 for (j=0; j<kn; j++) {hold=r[j][k]; r[j][k]=-r[j][i]; r[j][i]=hold;}
1325 }
1326 j=mm[k];
1327 if(j > k) {
1328 for (i=0; i<kn; i++) {hold=r[k][i]; r[k][i]=-r[j][i]; r[j][i]=hold;}
1329 }
1330 }
1331//////////////////////////////////////////////////////////////////////////////////
1332
1333
1334 Double_t k00=cin00*r[0][0]+cin10*r[1][0]+cin20*r[2][0]+cin30*r[3][0];
1335 Double_t k01=cin00*r[1][0]+cin10*r[1][1]+cin20*r[2][1]+cin30*r[3][1];
1336 Double_t k02=cin00*r[2][0]+cin10*r[2][1]+cin20*r[2][2]+cin30*r[3][2];
1337 Double_t k03=cin00*r[3][0]+cin10*r[3][1]+cin20*r[3][2]+cin30*r[3][3];
1338 Double_t k10=cin10*r[0][0]+cin11*r[1][0]+cin21*r[2][0]+cin31*r[3][0];
1339 Double_t k11=cin10*r[1][0]+cin11*r[1][1]+cin21*r[2][1]+cin31*r[3][1];
1340 Double_t k12=cin10*r[2][0]+cin11*r[2][1]+cin21*r[2][2]+cin31*r[3][2];
1341 Double_t k13=cin10*r[3][0]+cin11*r[3][1]+cin21*r[3][2]+cin31*r[3][3];
1342 Double_t k20=cin20*r[0][0]+cin21*r[1][0]+cin22*r[2][0]+cin32*r[3][0];
1343 Double_t k21=cin20*r[1][0]+cin21*r[1][1]+cin22*r[2][1]+cin32*r[3][1];
1344 Double_t k22=cin20*r[2][0]+cin21*r[2][1]+cin22*r[2][2]+cin32*r[3][2];
1345 Double_t k23=cin20*r[3][0]+cin21*r[3][1]+cin22*r[3][2]+cin32*r[3][3];
1346 Double_t k30=cin30*r[0][0]+cin31*r[1][0]+cin32*r[2][0]+cin33*r[3][0];
1347 Double_t k31=cin30*r[1][0]+cin31*r[1][1]+cin32*r[2][1]+cin33*r[3][1];
1348 Double_t k32=cin30*r[2][0]+cin31*r[2][1]+cin32*r[2][2]+cin33*r[3][2];
1349 Double_t k33=cin30*r[3][0]+cin31*r[3][1]+cin32*r[3][2]+cin33*r[3][3];
1350 Double_t k40=cin40*r[0][0]+cin41*r[1][0]+cin42*r[2][0]+cin43*r[3][0];
1351 Double_t k41=cin40*r[1][0]+cin41*r[1][1]+cin42*r[2][1]+cin43*r[3][1];
1352 Double_t k42=cin40*r[2][0]+cin41*r[2][1]+cin42*r[2][2]+cin43*r[3][2];
1353 Double_t k43=cin40*r[3][0]+cin41*r[3][1]+cin42*r[3][2]+cin43*r[3][3];
1354
1355 Double_t x0,x1,x2,x3,x4;
1356 newTrack->GetXElements(x0,x1,x2,x3,x4); // get the state vector
1357
1358 Double_t savex0=x0, savex1=x1, savex2=x2, savex3=x3;
1359
1360 x0+=k00*(m[0]-savex0)+k01*(m[1]-savex1)+k02*(m[2]-savex2)+
1361 k03*(m[3]-savex3);
1362 x1+=k10*(m[0]-savex0)+k11*(m[1]-savex1)+k12*(m[2]-savex2)+
1363 k13*(m[3]-savex3);
1364 x2+=k20*(m[0]-savex0)+k21*(m[1]-savex1)+k22*(m[2]-savex2)+
1365 k23*(m[3]-savex3);
1366 x3+=k30*(m[0]-savex0)+k31*(m[1]-savex1)+k32*(m[2]-savex2)+
1367 k33*(m[3]-savex3);
1368 x4+=k40*(m[0]-savex0)+k41*(m[1]-savex1)+k42*(m[2]-savex2)+
1369 k43*(m[3]-savex3);
1370
1371 Double_t c00,c10,c20,c30,c40,c11,c21,c31,c41,c22,c32,c42,c33,c43,c44;
1372
1373 c00=cin00-k00*cin00-k01*cin10-k02*cin20-k03*cin30;
1374 c10=cin10-k00*cin10-k01*cin11-k02*cin21-k03*cin31;
1375 c20=cin20-k00*cin20-k01*cin21-k02*cin22-k03*cin32;
1376 c30=cin30-k00*cin30-k01*cin31-k02*cin32-k03*cin33;
1377 c40=cin40-k00*cin40-k01*cin41-k02*cin42-k03*cin43;
1378
1379 c11=cin11-k10*cin10-k11*cin11-k12*cin21-k13*cin31;
1380 c21=cin21-k10*cin20-k11*cin21-k12*cin22-k13*cin32;
1381 c31=cin31-k10*cin30-k11*cin31-k12*cin32-k13*cin33;
1382 c41=cin41-k10*cin40-k11*cin41-k12*cin42-k13*cin43;
1383
1384 c22=cin22-k20*cin20-k21*cin21-k22*cin22-k23*cin32;
1385 c32=cin32-k20*cin30-k21*cin31-k22*cin32-k23*cin33;
1386 c42=cin42-k20*cin40-k21*cin41-k22*cin42-k23*cin43;
1387
1388 c33=cin33-k30*cin30-k31*cin31-k32*cin32-k33*cin33;
1389 c43=cin43-k30*cin40-k31*cin41-k32*cin42-k33*cin43;
1390
1391 c44=cin44-k40*cin40-k41*cin41-k42*cin42-k43*cin43;
1392
1393 newTrack->PutXElements(x0,x1,x2,x3,x4); // put the new state vector
1394
1395 newTrack->PutCElements(c00,c10,c11,c20,c21,c22,c30,c31,c32,c33,c40,c41,c42,c43,c44); // put in track the
1396 // new cov matrix
1397
1398 Double_t vmc[4][4];
1399
1400 vmc[0][0]=v00-c00; vmc[1][0]=-c10; vmc[2][0]=-c20; vmc[3][0]=-c30;
1401 vmc[1][1]=v11-c11; vmc[2][1]=-c21; vmc[3][1]=v31-c31;
1402 vmc[2][2]=v22-c22; vmc[3][2]=v32-c32;
1403 vmc[3][3]=v33-c33;
1404
1405 vmc[0][1]=vmc[1][0]; vmc[0][2]=vmc[2][0]; vmc[0][3]=vmc[3][0];
1406 vmc[1][2]=vmc[2][1]; vmc[1][3]=vmc[3][1];
1407 vmc[2][3]=vmc[3][2];
1408
1409
1410/////////////////////// vmc matrix inversion ///////////////////////////////////
1411
1412 d=1.;
1413
1414 for(k=0; k<kn; k++) {
1415 ll[k]=k;
1416 mm[k]=k;
1417 big=vmc[k][k];
1418 for(j=k; j<kn ; j++) {
1419 for (i=j; i<kn; i++) {
1420 if(TMath::Abs(big) < TMath::Abs(vmc[i][j]) ) { big=vmc[i][j]; ll[k]=i; mm[k]=j; }
1421 }
1422 }
1423//
1424 j= ll[k];
1425 if(j > k) {
1426 for(i=0; i<kn; i++) { hold=-vmc[k][i]; vmc[k][i]=vmc[j][i]; vmc[j][i]=hold; }
1427
1428 }
1429//
1430 i=mm[k];
1431 if(i > k ) {
1432 for(j=0; j<kn; j++) { hold=-vmc[j][k]; vmc[j][k]=vmc[j][i]; vmc[j][i]=hold; }
1433 }
1434//
1435 if(!big) {
1436 d=0.;
1437 cout << "Singular matrix\n";
1438 }
1439 for(i=0; i<kn; i++) {
1440 if(i == k) { continue; }
1441 vmc[i][k]=vmc[i][k]/(-big);
1442 }
1443//
1444 for(i=0; i<kn; i++) {
1445 hold=vmc[i][k];
1446 for(j=0; j<kn; j++) {
1447 if(i == k || j == k) { continue; }
1448 vmc[i][j]=hold*vmc[k][j]+vmc[i][j];
1449 }
1450 }
1451//
1452 for(j=0; j<kn; j++) {
1453 if(j == k) { continue; }
1454 vmc[k][j]=vmc[k][j]/big;
1455 }
1456//
1457 d=d*big;
1458//
1459 vmc[k][k]=1./big;
1460 }
1461//
1462 for(k=kn-1; k>=0; k--) {
1463 i=ll[k];
1464 if(i > k) {
1465 for (j=0; j<kn; j++) {hold=vmc[j][k]; vmc[j][k]=-vmc[j][i]; vmc[j][i]=hold;}
1466 }
1467 j=mm[k];
1468 if(j > k) {
1469 for (i=0; i<kn; i++) {hold=vmc[k][i]; vmc[k][i]=-vmc[j][i]; vmc[j][i]=hold;}
1470 }
1471 }
1472
1473
1474////////////////////////////////////////////////////////////////////////////////
1475
1476 Double_t chi2=(m[0]-x0)*( vmc[0][0]*(m[0]-x0) + 2.*vmc[1][0]*(m[1]-x1) +
1477 2.*vmc[2][0]*(m[2]-x2)+ 2.*vmc[3][0]*(m[3]-x3) ) +
1478 (m[1]-x1)* ( vmc[1][1]*(m[1]-x1) + 2.*vmc[2][1]*(m[2]-x2)+
1479 2.*vmc[3][1]*(m[3]-x3) ) +
1480 (m[2]-x2)* ( vmc[2][2]*(m[2]-x2)+ 2.*vmc[3][2]*(m[3]-x3) ) +
70a9314b 1481 (m[3]-x3)*vmc[3][3]*(m[3]-x3);
1482
1483 //cout<<" chi2 kalman = "<<chi2<<"\n"; getchar();
0983ac5b 1484 newTrack->SetChi2(newTrack->GetChi2()+chi2);
f66ae545 1485 // newTrack->SetChi2(newTrack->GetChi2()+chi2pred);
04b80329 1486
1487}
1488