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b48af428 1/**************************************************************************
2 * Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved. *
3 * *
4 * Author: The ALICE Off-line Project. *
5 * Contributors are mentioned in the code where appropriate. *
6 * *
7 * Permission to use, copy, modify and distribute this software and its *
8 * documentation strictly for non-commercial purposes is hereby granted *
9 * without fee, provided that the above copyright notice appears in all *
10 * copies and that both the copyright notice and this permission notice *
11 * appear in the supporting documentation. The authors make no claims *
12 * about the suitability of this software for any purpose. It is *
13 * provided "as is" without express or implied warranty. *
14 **************************************************************************/
15
16/*
17$Log$
4ae5bbc4 18Revision 1.21 2002/02/05 09:12:26 hristov
19Small mods for gcc 3.02
20
bcc5d57d 21Revision 1.20 2001/11/21 14:47:45 barbera
22Some unuseful print-out commented out
23
c57de405 24Revision 1.19 2001/11/21 10:49:07 barbera
25Bug correction suggested by Rene done
26
cf411bb5 27Revision 1.18 2001/11/20 15:46:17 barbera
28Point coordinated are calculated in cylindrical reference frame once and for all at the beginning of tracking V1
29
61231d74 30Revision 1.10.2.1 2001/10/24 07:26:04 hristov
31All the changes from the head are merged with the release
32
11091b43 33Revision 1.14 2001/10/24 07:19:57 hristov
34Some pointer correctly initialised in one of the constructors
35
a49bb2c8 36Revision 1.13 2001/10/21 19:17:12 hristov
37Several pointers were set to zero in the default constructors to avoid memory management problems
38
55cd883f 39Revision 1.12 2001/10/19 21:32:35 nilsen
40Minor changes to remove compliation warning on gcc 2.92.2 compiler, and
41cleanded up a little bit of code.
42
b48af428 43*/
44// The purpose of this class is to permorm the ITS tracking. The
45// constructor has the task to inizialize some private members. The method
46// DoTracking is written to be called by a macro. It gets the event number,
47// the minimum and maximum order number of TPC tracks that are to be tracked
48// trough the ITS, and the file where the recpoints are registered. The
49// method Recursivetracking is a recursive function that performs the
50// tracking trough the ITS The method Intersection found the layer, ladder
51// and detector whre the intersection take place and caluclate the
52// cohordinates of this intersection. It returns an integer that is 0 if the
53// intersection has been found successfully. The two mwthods Kalmanfilter
54// and kalmanfiltervert operate the kalmanfilter without and with the vertex
55// imposition respectively. The authors thank Mariana Bondila to have help
56// them to resolve some problems. July-2000
04b80329 57
4ae5bbc4 58#include <Riostream.h>
59#include <Riostream.h>
13888096 60#include <TMath.h>
13888096 61#include <TBranch.h>
62#include <TVector.h>
13888096 63#include <TFile.h>
64#include <TTree.h>
cbcfa38d 65#include <TStopwatch.h>
66
13888096 67#include "TParticle.h"
68#include "AliRun.h"
69#include "AliITS.h"
04b80329 70#include "AliITSsegmentationSSD.h"
13888096 71#include "AliITSgeomSPD.h"
72#include "AliITSgeomSDD.h"
73#include "AliITSgeomSSD.h"
74#include "AliITSgeom.h"
13888096 75#include "AliITSRecPoint.h"
04b80329 76#include "stdlib.h"
13888096 77#include "AliKalmanTrack.h"
78#include "AliMagF.h"
04b80329 79#include "AliITSTrackV1.h"
80#include "AliITSIOTrack.h"
81#include "AliITSRad.h"
13888096 82#include "../TPC/AliTPCtracker.h"
13888096 83#include "AliITSTrackerV1.h"
0983ac5b 84#include "AliITSVertex.h"
13888096 85
13888096 86ClassImp(AliITSTrackerV1)
55cd883f 87 //______________________________________________________________________
88AliITSTrackerV1::AliITSTrackerV1() {
89 //Default constructor
90 fITS = 0;
91 fresult = 0;
64ab0d55 92 fPtref=0.;
93 fChi2max=0.;
94 //fepsphi=0.;
95 //fepsz=0.;
55cd883f 96 frecPoints = 0;
97 fvettid = 0;
64ab0d55 98 fflagvert=0;
55cd883f 99 frl = 0;
64ab0d55 100 Int_t ia;
101 for(ia=0; ia<6; ia++) {
102 fNlad[ia]=0;
103 fNdet[ia]=0;
104 fAvrad[ia]=0.;
105 fDetx[ia]=0.;
106 fDetz[ia]=0.;
107 } // end for ia
55cd883f 108 fzmin = 0;
109 fzmax = 0;
110 fphimin = 0;
111 fphimax = 0;
112 fphidet = 0;
64ab0d55 113 fNRecPoints=0;
114 fRecCylR=0;
115 fRecCylPhi=0;
116 fRecCylZ=0;
117 fFieldFactor=0;
55cd883f 118}
b48af428 119//______________________________________________________________________
64ab0d55 120AliITSTrackerV1::AliITSTrackerV1(AliITS* IITTSS, Int_t evnumber, Bool_t flag) {
b48af428 121 //Origin A. Badala' and G.S. Pappalardo:
122 // e-mail Angela.Badala@ct.infn.it, Giuseppe.S.Pappalardo@ct.infn.it
123 // Class constructor. It does some initializations.
124
a49bb2c8 125 //PH Initialisation taken from the default constructor
b48af428 126 fITS = IITTSS;
a49bb2c8 127 fresult = 0;
64ab0d55 128 fPtref = 0.;
129 fChi2max =0.;
130 frecPoints = 0;
a49bb2c8 131 fvettid = 0;
64ab0d55 132 fflagvert = flag;
a49bb2c8 133 frl = 0;
134 fzmin = 0;
135 fzmax = 0;
136 fphimin = 0;
137 fphimax = 0;
138 fphidet = 0;
64ab0d55 139
b48af428 140 Int_t imax = 200,jmax = 450;
141 frl = new AliITSRad(imax,jmax);
142
143 ////////// gets information on geometry /////////////////////////////
64ab0d55 144 AliITSgeom *g1 = fITS->GetITSgeom();
b48af428 145 Int_t ll=1, dd=1;
146 TVector det(9);
147
b48af428 148 Int_t ia;
149 for(ia=0; ia<6; ia++) {
150 fNlad[ia]=g1->GetNladders(ia+1);
151 fNdet[ia]=g1->GetNdetectors(ia+1);
152 //cout<<fNlad[i]<<" "<<fNdet[i]<<"\n";
153 } // end for ia
b48af428 154
64ab0d55 155 //cout<<" mean radius = ";
b48af428 156 Int_t ib;
157 for(ib=0; ib<6; ib++) {
158 g1->GetCenterThetaPhi(ib+1,ll,dd,det);
159 Double_t r1=TMath::Sqrt(det(0)*det(0)+det(1)*det(1));
160 g1->GetCenterThetaPhi(ib+1,ll,dd+1,det);
161 Double_t r2=TMath::Sqrt(det(0)*det(0)+det(1)*det(1));
162 fAvrad[ib]=(r1+r2)/2.;
163 //cout<<fAvrad[ib]<<" ";
164 } // end for ib
165 //cout<<"\n"; getchar();
166
167 fDetx[0] = ((AliITSgeomSPD*)(g1->GetShape(1, ll, dd)))->GetDx();
168 fDetz[0] = ((AliITSgeomSPD*)(g1->GetShape(1, ll, dd)))->GetDz();
169
170 fDetx[1] = ((AliITSgeomSPD*)(g1->GetShape(2, ll, dd)))->GetDx();
171 fDetz[1] = ((AliITSgeomSPD*)(g1->GetShape(2, ll, dd)))->GetDz();
172
173 fDetx[2] = ((AliITSgeomSDD*)(g1->GetShape(3, ll, dd)))->GetDx();
174 fDetz[2] = ((AliITSgeomSDD*)(g1->GetShape(3, ll, dd)))->GetDz();
175
176 fDetx[3] = ((AliITSgeomSDD*)(g1->GetShape(4, ll, dd)))->GetDx();
177 fDetz[3] = ((AliITSgeomSDD*)(g1->GetShape(4, ll, dd)))->GetDz();
178
179 fDetx[4] = ((AliITSgeomSSD*)(g1->GetShape(5, ll, dd)))->GetDx();
180 fDetz[4] = ((AliITSgeomSSD*)(g1->GetShape(5, ll, dd)))->GetDz();
181
182 fDetx[5] = ((AliITSgeomSSD*)(g1->GetShape(6, ll, dd)))->GetDx();
183 fDetz[5] = ((AliITSgeomSSD*)(g1->GetShape(6, ll, dd)))->GetDz();
184 //cout<<" Detx Detz\n";
185 //for(Int_t la=0; la<6; la++) cout<<" "<<fDetx[la]<<" "<<
186 // fDetz[la]<<endl;
187 //getchar();
64ab0d55 188
b48af428 189 // allocate memory and define matrices fzmin, fzmax, fphimin and fphimax //
190 Double_t epsz=1.2;
191 Double_t epszdrift=0.05;
192
193 fzmin = new Double_t*[6]; fzmax = new Double_t*[6];
194 Int_t im1, im2, im2max;
195 for(im1=0; im1<6; im1++) {
196 im2max=fNdet[im1];
197 fzmin[im1] = new Double_t[im2max]; fzmax[im1] = new Double_t[im2max];
198 } // end for im1
199
200 for(im1=0; im1<6; im1++) {
201 im2max=fNdet[im1];
202 for(im2=0; im2<im2max; im2++) {
203 g1->GetCenterThetaPhi(im1+1,1,im2+1,det);
204 if(im2!=0) fzmin[im1][im2]=det(2)-fDetz[im1];
205 else
206 fzmin[im1][im2]=det(2)-(fDetz[im1])*epsz;
207 if(im2!=(im2max-1)) fzmax[im1][im2]=det(2)+fDetz[im1];
208 else
cbcfa38d 209 fzmax[im1][im2]=det(2)+fDetz[im1]*epsz;
b48af428 210 if(im1==2 || im1==3) {
211 fzmin[im1][im2]-=epszdrift;
212 fzmax[im1][im2]+=epszdrift;
213 } // end if im1==2 || im1==3
214 } // end for im2
215 } // end for im1
13888096 216
b48af428 217 fphimin = new Double_t*[6]; fphimax = new Double_t*[6];
218 for(im1=0;im1<6;im1++) {
219 im2max=fNlad[im1];
220 fphimin[im1] = new Double_t[im2max];
221 fphimax[im1] = new Double_t[im2max];
222 } // end for im1
223
224 fphidet = new Double_t*[6];
225 for(im1=0; im1<6; im1++) {
226 im2max=fNlad[im1];
227 fphidet[im1] = new Double_t[im2max];
228 } // end for im1
229
64ab0d55 230 //Float_t global[3],local[3];
231 Double_t global[3],local[3];
b48af428 232 Double_t pigre=TMath::Pi();
233 Double_t xmin,ymin,xmax,ymax;
234
235 for(im1=0; im1<6; im1++) {
236 im2max=fNlad[im1];
237 for(im2=0; im2<im2max; im2++) {
238 Int_t idet=2;
239 g1->GetCenterThetaPhi(im1+1,im2+1,idet,det);
240 fphidet[im1][im2] = TMath::ATan2(Double_t(det(1)),
241 Double_t(det(0)));
242 if(fphidet[im1][im2]<0.) fphidet[im1][im2]+=2.*pigre;
243 local[1]=local[2]=0.;
244 local[0]= -(fDetx[im1]);
245 if(im1==0) local[0]= (fDetx[im1]); //to take into account
246 // different reference system
247 g1->LtoG(im1+1,im2+1,idet,local,global);
248 xmax=global[0]; ymax=global[1];
249 local[0]= (fDetx[im1]);
250 if(im1==0) local[0]= -(fDetx[im1]);//take into account different
251 // reference system
252 g1->LtoG(im1+1,im2+1,idet,local,global);
253 xmin=global[0]; ymin=global[1];
254 fphimin[im1][im2]= TMath::ATan2(ymin,xmin);
255 if(fphimin[im1][im2]<0.) fphimin[im1][im2]+=2.*pigre;
256 fphimax[im1][im2]= TMath::ATan2(ymax,xmax);
257 if(fphimax[im1][im2]<0.) fphimax[im1][im2]+=2.*pigre;
258 } // end for im2
259 } // end for im1
64ab0d55 260//////////////////////////////////////////////////////////////////////////////////////////////////////////
261/////////////// allocate memory and define vector fNRecPoints and matrices fRecCylR, fRecCylPhi, fRecCylZ /////////////
262 gAlice->GetEvent(evnumber);
263 Int_t NumOfModules = g1->GetIndexMax();
264 //fRecCylR = new Float_t *[NumOfModules];
265 fRecCylR = new Double_t *[NumOfModules];
266 //fRecCylPhi = new Float_t *[NumOfModules];
267 fRecCylPhi = new Double_t *[NumOfModules];
268 //fRecCylZ = new Float_t *[NumOfModules];
269 fRecCylZ = new Double_t *[NumOfModules];
270 AliITSRecPoint *recp;
271 fNRecPoints = new Int_t[NumOfModules];
272
273 for(Int_t module=0; module<NumOfModules; module++) {
274 fITS->ResetRecPoints();
275 gAlice->TreeR()->GetEvent(module);
276 frecPoints=fITS->RecPoints();
277 Int_t nRecPoints=fNRecPoints[module]=frecPoints->GetEntries();
278 /*
279 fRecCylR[module] = new Float_t[nRecPoints];
280 fRecCylPhi[module] = new Float_t[nRecPoints];
281 fRecCylZ[module] = new Float_t[nRecPoints];
282 */
283 fRecCylR[module] = new Double_t[nRecPoints];
284 fRecCylPhi[module] = new Double_t[nRecPoints];
285 fRecCylZ[module] = new Double_t[nRecPoints];
286 Int_t ind;
287 for(ind=0; ind<fNRecPoints[module]; ind++) {
288 recp=(AliITSRecPoint*)frecPoints->UncheckedAt(ind);
289 // Float_t global[3], local[3];
290 Double_t global[3], local[3];
291 local[0]=recp->GetX();
292 local[1]=0.;
293 local[2]= recp->GetZ();
294 g1->LtoG(module,local,global);
295 /*
296 Float_t r = TMath::Sqrt(global[0]*global[0]+global[1]*global[1]); // r hit
297 Float_t phi = TMath::ATan2(global[1],global[0]); if(phi<0.) phi+=2.*TMath::Pi(); // phi hit
298 Float_t z = global[2]; // z hit
299 */
300
301 Double_t r = TMath::Sqrt(global[0]*global[0]+global[1]*global[1]); // r hit
302 Double_t phi = TMath::ATan2(global[1],global[0]); if(phi<0.) phi+=2.*TMath::Pi(); // phi hit
303 Double_t z = global[2]; // z hit
304
305 fRecCylR[module][ind]=r;
306 fRecCylPhi[module][ind]=phi;
307 fRecCylZ[module][ind]=z;
308 }
309 }
310 //}
311 //}
312////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
313
b48af428 314
315 ////////// gets magnetic field factor //////////////////////////////
316
317 AliMagF * fieldPointer = gAlice->Field();
318 fFieldFactor = (Double_t)fieldPointer->Factor();
319 //cout<< " field factor = "<<fFieldFactor<<"\n"; getchar();
320}
321//______________________________________________________________________
04b80329 322AliITSTrackerV1::AliITSTrackerV1(const AliITSTrackerV1 &cobj) {
b48af428 323 // Origin A. Badala' and G.S. Pappalardo:
324 // e-mail Angela.Badala@ct.infn.it, Giuseppe.S.Pappalardo@ct.infn.it
325 // copy constructor
64ab0d55 326
327 *fITS = *cobj.fITS;
b48af428 328 *fresult = *cobj.fresult;
329 fPtref = cobj.fPtref;
330 fChi2max = cobj.fChi2max;
331 **fvettid = **cobj.fvettid;
332 fflagvert = cobj.fflagvert;
333 Int_t imax=200,jmax=450;
334 frl = new AliITSRad(imax,jmax);
335 *frl = *cobj.frl;
336 fFieldFactor = cobj.fFieldFactor;
337 Int_t i,im1,im2,im2max;
338 for(i=0; i<6; i++) {
339 fNlad[i] = cobj.fNlad[i];
340 fNdet[i] = cobj.fNdet[i];
341 fAvrad[i] = cobj.fAvrad[i];
342 fDetx[i] = cobj.fDetx[i];
343 fDetz[i] = cobj.fDetz[i];
344 } // end or i
345 fzmin = new Double_t*[6]; fzmax = new Double_t*[6];
346 for(im1=0; im1<6; im1++) {
347 im2max=fNdet[im1];
348 fzmin[im1] = new Double_t[im2max];
349 fzmax[im1] = new Double_t[im2max];
350 } // end for im1
cbcfa38d 351 fphimin = new Double_t*[6]; fphimax = new Double_t*[6];
b48af428 352 for(im1=0;im1<6;im1++) {
353 im2max=fNlad[im1];
354 fphimin[im1] = new Double_t[im2max];
355 fphimax[im1] = new Double_t[im2max];
356 } // end for im1
357
358 fphidet = new Double_t*[6];
359 for(im1=0; im1<6; im1++) {
360 im2max=fNlad[im1];
361 fphidet[im1] = new Double_t[im2max];
362 } // end for im1
363 for(im1=0; im1<6; im1++) {
364 im2max=fNdet[im1];
365 for(im2=0; im2<im2max; im2++) {
366 fzmin[im1][im2]=cobj.fzmin[im1][im2];
367 fzmax[im1][im2]=cobj.fzmax[im1][im2];
368 } // end for im2
369 } // end for im1
370 for(im1=0; im1<6; im1++) {
371 im2max=fNlad[im1];
372 for(im2=0; im2<im2max; im2++) {
373 fphimin[im1][im2]=cobj.fphimin[im1][im2];
374 fphimax[im1][im2]=cobj.fphimax[im1][im2];
375 fphidet[im1][im2]=cobj.fphidet[im1][im2];
376 } // end for im2
377 } // end for im2
64ab0d55 378
379
380 AliITSgeom *g1 = fITS->GetITSgeom();
381 Int_t NumOfModules = g1->GetIndexMax();
382 /*
383 fRecCylR = new Float_t *[NumOfModules];
384 fRecCylPhi = new Float_t *[NumOfModules];
385 fRecCylZ = new Float_t *[NumOfModules];
386 */
387 fRecCylR = new Double_t *[NumOfModules];
388 fRecCylPhi = new Double_t *[NumOfModules];
389 fRecCylZ = new Double_t *[NumOfModules];
390 fNRecPoints = new Int_t[NumOfModules];
391 for(Int_t module=0; module<NumOfModules; module++) {
392 Int_t nRecPoints=fNRecPoints[module]=cobj.fNRecPoints[module];
393 /*
394 fRecCylR[module] = new Float_t[nRecPoints];
395 fRecCylPhi[module] = new Float_t[nRecPoints];
396 fRecCylZ[module] = new Float_t[nRecPoints];
397 */
398 fRecCylR[module] = new Double_t[nRecPoints];
399 fRecCylPhi[module] = new Double_t[nRecPoints];
400 fRecCylZ[module] = new Double_t[nRecPoints];
401 Int_t ind;
402 for(ind=0; ind<nRecPoints; ind++) {
403 fRecCylR[module][ind]=cobj.fRecCylR[module][ind];
404 fRecCylPhi[module][ind]=cobj.fRecCylPhi[module][ind];
405 fRecCylZ[module][ind]=cobj.fRecCylZ[module][ind];
406 }
407 }
408
409}
410void AliITSTrackerV1::DelMatrix(Int_t NumOfModules) {
411 for(Int_t mod=0; mod<NumOfModules; mod++) {
412 delete fRecCylR[mod];
413 delete fRecCylPhi[mod];
414 delete fRecCylZ[mod];
415 }
416 delete fRecCylR;
417 delete fRecCylPhi;
418 delete fRecCylZ;
cbcfa38d 419}
b48af428 420//______________________________________________________________________
cbcfa38d 421AliITSTrackerV1::~AliITSTrackerV1(){
b48af428 422 // Origin A. Badala' and G.S. Pappalardo:
423 // e-mail Angela.Badala@ct.infn.it, Giuseppe.S.Pappalardo@ct.infn.it
64ab0d55 424 // class destructor
425 delete frl;
426 delete fNRecPoints;
427 for(Int_t i=0; i<6; i++) {
428 delete fzmin[i];
429 delete fzmax[i];
430 delete fphimin[i];
431 delete fphimax[i];
432 delete fphidet[i];
433 }
434
435 delete fzmin;
436 delete fzmax;
437 delete fphimin;
438 delete fphimax;
439 delete fphidet;
440
13888096 441}
b48af428 442//______________________________________________________________________
04b80329 443AliITSTrackerV1 &AliITSTrackerV1::operator=(AliITSTrackerV1 obj) {
b48af428 444 // Origin A. Badala' and G.S. Pappalardo:
445 // e-mail Angela.Badala@ct.infn.it, Giuseppe.S.Pappalardo@ct.infn.it
446 // assignement operator
447
64ab0d55 448 *fITS = *obj.fITS;
b48af428 449 *fresult = *obj.fresult;
450 fPtref = obj.fPtref;
451 fChi2max = obj.fChi2max;
452 **fvettid = **obj.fvettid;
453 fflagvert = obj.fflagvert;
454 Int_t imax=200,jmax=450;
455 frl = new AliITSRad(imax,jmax);
456 *frl = *obj.frl;
457 fFieldFactor = obj.fFieldFactor;
458 Int_t i;
459 for(i=0; i<6; i++) {
460 fNlad[i] = obj.fNlad[i];
461 fNdet[i] = obj.fNdet[i];
462 fAvrad[i] = obj.fAvrad[i];
463 fDetx[i] = obj.fDetx[i];
464 fDetz[i] = obj.fDetz[i];
465 } // end for i
466 fzmin = new Double_t*[6];
467 fzmax = new Double_t*[6];
468 Int_t im1, im2, im2max;
469 for(im1=0; im1<6; im1++) {
470 im2max=fNdet[im1];
471 fzmin[im1] = new Double_t[im2max]; fzmax[im1] = new Double_t[im2max];
472 } // end for im1
cbcfa38d 473 fphimin = new Double_t*[6]; fphimax = new Double_t*[6];
b48af428 474 for(im1=0;im1<6;im1++) {
475 im2max=fNlad[im1];
476 fphimin[im1] = new Double_t[im2max];
477 fphimax[im1] = new Double_t[im2max];
478 } // end for im1
479
480 fphidet = new Double_t*[6];
481 for(im1=0; im1<6; im1++) {
482 im2max=fNlad[im1];
483 fphidet[im1] = new Double_t[im2max];
484 } // end for im1
485 for(im1=0; im1<6; im1++) {
486 im2max=fNdet[im1];
487 for(im2=0; im2<im2max; im2++) {
488 fzmin[im1][im2]=obj.fzmin[im1][im2];
489 fzmax[im1][im2]=obj.fzmax[im1][im2];
490 } // end for im2
491 } // end for im1
492 for(im1=0; im1<6; im1++) {
493 im2max=fNlad[im1];
494 for(im2=0; im2<im2max; im2++) {
495 fphimin[im1][im2]=obj.fphimin[im1][im2];
496 fphimax[im1][im2]=obj.fphimax[im1][im2];
497 fphidet[im1][im2]=obj.fphidet[im1][im2];
498 } // end for im2
499 } // end for im1
500
64ab0d55 501 AliITSgeom *g1 = fITS->GetITSgeom();
502 Int_t NumOfModules = g1->GetIndexMax();
503 /*
504 fRecCylR = new Float_t *[NumOfModules];
505 fRecCylPhi = new Float_t *[NumOfModules];
506 fRecCylZ = new Float_t *[NumOfModules];
507 */
508 fRecCylR = new Double_t *[NumOfModules];
509 fRecCylPhi = new Double_t *[NumOfModules];
510 fRecCylZ = new Double_t *[NumOfModules];
511 fNRecPoints = new Int_t[NumOfModules];
512 for(Int_t module=0; module<NumOfModules; module++) {
513 Int_t nRecPoints=fNRecPoints[module]=obj.fNRecPoints[module];
514 /*
515 fRecCylR[module] = new Float_t[nRecPoints];
516 fRecCylPhi[module] = new Float_t[nRecPoints];
517 fRecCylZ[module] = new Float_t[nRecPoints];
518 */
519 fRecCylR[module] = new Double_t[nRecPoints];
520 fRecCylPhi[module] = new Double_t[nRecPoints];
521 fRecCylZ[module] = new Double_t[nRecPoints];
522 Int_t ind;
523 for(ind=0; ind<nRecPoints; ind++) {
524 fRecCylR[module][ind]=obj.fRecCylR[module][ind];
525 fRecCylPhi[module][ind]=obj.fRecCylPhi[module][ind];
526 fRecCylZ[module][ind]=obj.fRecCylZ[module][ind];
527 }
528 }
529
530
b48af428 531 return *this;
04b80329 532}
b48af428 533//______________________________________________________________________
534void AliITSTrackerV1::DoTracking(Int_t evNumber,Int_t minTr,Int_t maxTr,
61231d74 535 TFile *file, Bool_t realmass) {
b48af428 536 // Origin A. Badala' and G.S. Pappalardo:
537 // e-mail Angela.Badala@ct.infn.it, Giuseppe.S.Pappalardo@ct.infn.it
538 // The method needs the event number, the minimum and maximum order
539 // number of TPC tracks that
540 // are to be tracked trough the ITS, and the file where the recpoints
541 // are registered.
542 // The method can be called by a macro. It preforms the tracking for
543 // all good TPC tracks
544
545 printf("begin DoTracking - file %p\n",file);
546
547 gAlice->GetEvent(evNumber); //modificato per gestire hbt
13888096 548
b48af428 549 AliKalmanTrack *kkprov;
550 kkprov->SetConvConst(100/0.299792458/0.2/fFieldFactor);
551
552 TFile *cf=TFile::Open("AliTPCclusters.root");
553 AliTPCParam *digp= (AliTPCParam*)cf->Get("75x40_100x60");
554 if (!digp) { cerr<<"TPC parameters have not been found !\n"; getchar();}
555
556 cf->cd();
557 AliTPCtracker *tracker = new AliTPCtracker(digp,evNumber);
558
559 // Load clusters
560 tracker->LoadInnerSectors();
561 tracker->LoadOuterSectors();
562
563 // Load tracks
64ab0d55 564 TFile *tf=TFile::Open("AliTPCtracksSorted.root");
b48af428 565 if (!tf->IsOpen()) {
566 cerr<<"Can't open AliTPCtracksSorted.root !\n";
567 return ;
568 } // end if
569 TObjArray tracks(200000);
570 char tname[100];
571 sprintf(tname,"TreeT_TPC_%d",evNumber);
572
573 TTree *tracktree=(TTree*)tf->Get(tname);
574 if (!tracktree) {cerr<<"Can't get a tree with TPC tracks !\n";}
575 TBranch *tbranch=tracktree->GetBranch("tracks");
576 Int_t nentr=(Int_t)tracktree->GetEntries();
577 Int_t kk;
578
579 AliTPCtrack *ioTrackTPC=0;
580 for (kk=0; kk<nentr; kk++) {
581 ioTrackTPC=new AliTPCtrack;
582 tbranch->SetAddress(&ioTrackTPC);
583 tracktree->GetEvent(kk);
584 tracker->CookLabel(ioTrackTPC,0.1);
585 tracks.AddLast(ioTrackTPC);
586 } // end for kk
587 delete tracker;
588 tf->Close();
589
590 Int_t nt = tracks.GetEntriesFast();
591 cerr<<"Number of found tracks "<<nt<<endl;
592
593 TVector vec(5);
594 TTree *tr=gAlice->TreeR();
595 Int_t nent=(Int_t)tr->GetEntries();
596 frecPoints = fITS->RecPoints();
597
598 Int_t numbpoints;
599 Int_t totalpoints=0;
600 Int_t *np = new Int_t[nent];
601 fvettid = new Int_t* [nent];
602 Int_t mod;
603
604 for (mod=0; mod<nent; mod++) {
605 fvettid[mod]=0;
606 fITS->ResetRecPoints();
607 gAlice->TreeR()->GetEvent(mod);
608 numbpoints = frecPoints->GetEntries();
609 totalpoints+=numbpoints;
610 np[mod] = numbpoints;
611 //cout<<" mod = "<<mod<<" numbpoints = "<<numbpoints<<"\n";getchar();
612 fvettid[mod] = new Int_t[numbpoints];
613 Int_t ii;
614 for (ii=0;ii<numbpoints; ii++) *(fvettid[mod]+ii)=0;
615 } // end for mod
616
617 AliTPCtrack *track=0;
618
619 if(minTr < 0) {minTr = 0; maxTr = nt-1;}
620
621 TVector vgeant(3);
622
623 TTree tracktree1("TreeT","Tree with ITS tracks");
624 AliITSIOTrack *ioTrack=0;
625 tracktree1.Branch("ITStracks","AliITSIOTrack",&ioTrack,32000,0);
626
61231d74 627 TDatabasePDG * db = new TDatabasePDG;
628
b48af428 629 Int_t j;
630 for (j=minTr; j<=maxTr; j++) {
631 track=(AliTPCtrack*)tracks.UncheckedAt(j);
632 if (!track) continue;
61231d74 633
634 /// mass definition ////////////////////////
635 Double_t mass=0.13956995;
636 Int_t pcode=211; // a pion by default
637 if(realmass) {
638 Int_t TPClabel=TMath::Abs( track->GetLabel() );
639 TParticle *p = (TParticle*)gAlice->Particle(TPClabel);
640 pcode=p->GetPdgCode();
641 // Int_t mothercode=p->GetFirstMother();
642 //if(mothercode>0 ) numofsecondaries++; else numofprimaries++;
643 }
644 //if(!pcode) pcode=211;
645 if(TMath::Abs(pcode)<20443) mass=db->GetParticle(pcode)->Mass();
646
647
648 ///////////////////////////////////////////////
64ab0d55 649 /*
b48af428 650 ////// propagation to the end of TPC //////////////
651 Double_t xk=77.415;
61231d74 652 track->PropagateTo(xk, 28.94, 1.204e-3,mass); //Ne
b48af428 653 xk -=0.01;
61231d74 654 track->PropagateTo(xk, 44.77, 1.71,mass); //Tedlar
b48af428 655 xk -=0.04;
61231d74 656 track->PropagateTo(xk, 44.86, 1.45,mass); //kevlar
b48af428 657 xk -=2.0;
61231d74 658 track->PropagateTo(xk, 41.28, 0.029,mass); //Nomex
b48af428 659 xk-=16;
61231d74 660 track->PropagateTo(xk,36.2,1.98e-3,mass); //C02
b48af428 661 xk -=0.01;
61231d74 662 track->PropagateTo(xk, 24.01, 2.7,mass); //Al
b48af428 663 xk -=0.01;
61231d74 664 track->PropagateTo(xk, 44.77, 1.71,mass); //Tedlar
b48af428 665 xk -=0.04;
61231d74 666 track->PropagateTo(xk, 44.86, 1.45,mass); //kevlar
b48af428 667 xk -=0.5;
61231d74 668 track->PropagateTo(xk, 41.28, 0.029,mass); //Nomex
b48af428 669 ////////////////////////////////////////////////////////////////////
64ab0d55 670 */
d3ab000e 671 // new propagation to the end of TPC
64ab0d55 672 Double_t xk=80.;
673 // track->PropagateTo(xk,0.,0.); //Ne if it's still there //attenzione funziona solo se modifica in TPC
674 // Double_t xk=77.415;
d3ab000e 675 track->PropagateTo(xk, 28.94, 1.204e-3);
676 xk-=0.005;
677 track->PropagateTo(xk, 44.77,1.71); //Tedlar
678 xk-=0.02;
679 track->PropagateTo(xk, 44.86, 1.45); //Kevlar
680 xk-=2.0;
681 track->PropagateTo(xk, 41.28, 0.029);//Nomex
682 xk-=0.02;
683 track->PropagateTo(xk, 44.86, 1.45); //Kevlar
684 xk-=0.005;
685 track->PropagateTo(xk, 44.77, 1.71); //Tedlar
686
687 xk=61.;
64ab0d55 688 // track->PropagateTo(xk,0.,0.); //C02
689 track->PropagateTo(xk,36.2,1.98e-3); //C02 //attenzione funziona solo se modifica in TPC
d3ab000e 690
691 xk -=0.005;
692 track->PropagateTo(xk, 24.01, 2.7); //Al
693 xk -=0.005;
694 track->PropagateTo(xk, 44.77, 1.71); //Tedlar
695 xk -=0.02;
696 track->PropagateTo(xk, 44.86, 1.45); //Kevlar
697 xk -=0.5;
698 track->PropagateTo(xk, 41.28, 0.029); //Nomex
699 xk -=0.02;
700 track->PropagateTo(xk, 44.86, 1.45); //Kevlar
701 xk -=0.005;
702 track->PropagateTo(xk, 44.77, 1.71); //Tedlar
703 xk -=0.005;
64ab0d55 704 track->PropagateTo(xk, 24.01, 2.7); //Al
705 ////////////////////////////////////////////////////////////////////////////////////////////////////////
61231d74 706 AliITSTrackV1 trackITS(*track);
707 trackITS.PutMass(mass); //new to add mass to track
b48af428 708 if(fresult){ delete fresult; fresult=0;}
709 fresult = new AliITSTrackV1(trackITS);
710
711 AliITSTrackV1 primaryTrack(trackITS);
712 vgeant=(*fresult).GetVertex();
713
714 // Definition of dv and zv for vertex constraint
715 Double_t sigmaDv=0.0050; Double_t sigmaZv=0.010;
716 //Double_t sigmaDv=0.0015; Double_t sigmaZv=0.0015;
13888096 717 Double_t uniform= gRandom->Uniform();
718 Double_t signdv;
719 if(uniform<=0.5) signdv=-1.;
b48af428 720 else
721 signdv=1.;
722
04b80329 723 Double_t vr=TMath::Sqrt(vgeant(0)*vgeant(0)+ vgeant(1)*vgeant(1));
b48af428 724 Double_t dv=gRandom->Gaus(signdv*vr,(Float_t)sigmaDv);
725 Double_t zv=gRandom->Gaus(vgeant(2),(Float_t)sigmaZv);
726 //cout<<" Dv e Zv = "<<dv<<" "<<zv<<"\n";
727 trackITS.SetDv(dv);
728 trackITS.SetZv(zv);
729 trackITS.SetsigmaDv(sigmaDv);
730 trackITS.SetsigmaZv(sigmaZv);
731 (*fresult).SetDv(dv);
732 (*fresult).SetZv(zv);
733 (*fresult).SetsigmaDv(sigmaDv);
734 (*fresult).SetsigmaZv(sigmaZv);
735 primaryTrack.SetDv(dv);
736 primaryTrack.SetZv(zv);
737 primaryTrack.SetsigmaDv(sigmaDv);
738 primaryTrack.SetsigmaZv(sigmaZv);
739 primaryTrack.PrimaryTrack(frl);
740 TVector d2=primaryTrack.Getd2();
741 TVector tgl2=primaryTrack.Gettgl2();
742 TVector dtgl=primaryTrack.Getdtgl();
743 trackITS.Setd2(d2); trackITS.Settgl2(tgl2);
744 trackITS.Setdtgl(dtgl);
745 (*fresult).Setd2(d2); (*fresult).Settgl2(tgl2);
746 (*fresult).Setdtgl(dtgl);
747 /*
748 trackITS.SetVertex(vertex); trackITS.SetErrorVertex(ervertex);
749 (*result).SetVertex(vertex); (*result).SetErrorVertex(ervertex);
750 */
751 TList *list= new TList();
752
753 list->AddLast(&trackITS);
754
755 fPtref=TMath::Abs( (trackITS).GetPt() );
756 if(fPtref>1.0) fChi2max=40.;
757 if(fPtref<=1.0) fChi2max=20.;
758 if(fPtref<0.4 ) fChi2max=100.;
759 if(fPtref<0.2 ) fChi2max=40.;
760 // if(fPtref<0.4 ) fChi2max=30.;
761 // if(fPtref<0.2 ) fChi2max=20.;
762 //if(fPtref<0.2 ) fChi2max=10.;
763 //if(fPtref<0.1 ) fChi2max=5.;
c57de405 764 //cout << "\n Pt = " << fPtref <<"\n"; //stampa
b48af428 765 RecursiveTracking(list);
766 list->Delete();
767 delete list;
768
769 Int_t itot=-1;
770 TVector vecTotLabRef(18);
771 Int_t lay, k;
772 for(lay=5; lay>=0; lay--) {
773 TVector vecLabRef(3);
774 vecLabRef=(*fresult).GetLabTrack(lay);
775 Float_t clustZ=(*fresult).GetZclusterTrack( lay);
776 for(k=0; k<3; k++){
04b80329 777 Int_t lpp=(Int_t)vecLabRef(k);
778 if(lpp>=0) {
b48af428 779 TParticle *p=(TParticle*) gAlice->Particle(lpp);
780 Int_t pcode=p->GetPdgCode();
781 if(pcode==11) vecLabRef(k)=p->GetFirstMother();
782 } // end if
783 itot++; vecTotLabRef(itot)=vecLabRef(k);
64ab0d55 784 if(vecLabRef(k)==0. && clustZ == -1.) vecTotLabRef(itot) =-3.;
b48af428 785 } // end for k
786 } // end for lay
787 Long_t labref;
788 Int_t freq;
789 (*fresult).Search(vecTotLabRef, labref, freq);
790
791 //if(freq < 6) labref=-labref; // cinque - sei
792 if(freq < 5) labref=-labref; // cinque - sei
793 (*fresult).SetLabel(labref);
794
795 // cout<<" progressive track number = "<<j<<"\r";
796 // cout<<j<<"\r";
797 Int_t numOfCluster=(*fresult).GetNumClust();
c57de405 798 //cout<<" progressive track number = "<<j<<"\n"; // stampa
b48af428 799 Long_t labITS=(*fresult).GetLabel();
c57de405 800 //cout << " ITS track label = " << labITS << "\n"; // stampa
b48af428 801 Int_t lab=track->GetLabel();
c57de405 802 //cout << " TPC track label = " << lab <<"\n"; // stampa
b48af428 803 //propagation to vertex
804
805 Double_t rbeam=3.;
61231d74 806 if((*fresult).DoNotCross(rbeam)) continue; //no intersection with beampipe
b48af428 807 (*fresult).Propagation(rbeam);
808 Double_t c00,c10,c11,c20,c21,c22,c30,c31,c32,c33,c40,c41,c42,c43,c44;
809 (*fresult).GetCElements(c00,
810 c10,c11,
811 c20,c21,c22,
812 c30,c31,c32,c33,
813 c40,c41,c42,c43,c44);
13888096 814
b48af428 815 Double_t pt=TMath::Abs((*fresult).GetPt());
816 Double_t dr=(*fresult).GetD();
817 Double_t z=(*fresult).GetZ();
818 Double_t tgl=(*fresult).GetTgl();
819 Double_t c=(*fresult).GetC();
820 Double_t cy=c/2.;
821 Double_t dz=z-(tgl/cy)*TMath::ASin((*fresult).Arga(rbeam));
822 dz-=vgeant(2);
823 // cout<<" dr e dz alla fine = "<<dr<<" "<<dz<<"\n"; getchar();
824 Double_t phi=(*fresult).Getphi();
825 Double_t phivertex = phi - TMath::ASin((*fresult).ArgA(rbeam));
826 Double_t duepi=2.*TMath::Pi();
827 if(phivertex>duepi) phivertex-=duepi;
828 if(phivertex<0.) phivertex+=duepi;
829 /////////////////////////////////////////////////////////////
830 Int_t idmodule,idpoint;
831 if(numOfCluster >=5) { // cinque - sei
832 //if(numOfCluster ==6) { // cinque - sei
833 AliITSIOTrack outTrack;
834 ioTrack=&outTrack;
835 ioTrack->SetStatePhi(phi);
836 ioTrack->SetStateZ(z);
837 ioTrack->SetStateD(dr);
838 ioTrack->SetStateTgl(tgl);
839 ioTrack->SetStateC(c);
840 Double_t radius=(*fresult).Getrtrack();
841 ioTrack->SetRadius(radius);
842 Int_t charge;
843 if(c>0.) charge=-1; else charge=1;
844 ioTrack->SetCharge(charge);
845 ioTrack->SetCovMatrix(c00,
846 c10,c11,
847 c20,c21,c22,
848 c30,c31,c32,c33,
849 c40,c41,c42,c43,c44);
850 Double_t px=pt*TMath::Cos(phivertex);
851 Double_t py=pt*TMath::Sin(phivertex);
852 Double_t pz=pt*tgl;
853 Double_t xtrack=dr*TMath::Sin(phivertex);
854 Double_t ytrack=dr*TMath::Cos(phivertex);
855 Double_t ztrack=dz+vgeant(2);
856 ioTrack->SetPx(px);
857 ioTrack->SetPy(py);
858 ioTrack->SetPz(pz);
859 ioTrack->SetX(xtrack);
860 ioTrack->SetY(ytrack);
861 ioTrack->SetZ(ztrack);
862 ioTrack->SetLabel(labITS);
863 ioTrack->SetTPCLabel(lab);
61231d74 864 ioTrack->SetDz(dz);
b48af428 865 Int_t il;
866 for(il=0;il<6; il++){
867 ioTrack->SetIdPoint(il,(*fresult).GetIdPoint(il));
868 ioTrack->SetIdModule(il,(*fresult).GetIdModule(il));
869 } // end for il
870 tracktree1.Fill();
871 for (il=0;il<6;il++) {
872 idpoint=(*fresult).GetIdPoint(il);
873 idmodule=(*fresult).GetIdModule(il);
61231d74 874 if(idmodule>0.) *(fvettid[idmodule]+idpoint)=1;
875
b48af428 876 ioTrack->SetIdPoint(il,idpoint);
877 ioTrack->SetIdModule(il,idmodule);
878 } // end for il
879 } // end if on numOfCluster
880 //gObjectTable->Print(); // stampa memoria
881 } // end for (int j=minTr; j<=maxTr; j++)
61231d74 882 delete db;
b48af428 883 static Bool_t first=kTRUE;
884 static TFile *tfile;
885 if(first) {
886 tfile=new TFile("itstracks.root","RECREATE");
887 //cout<<"I have opened itstracks.root file "<<endl;
888 } // end if
889 first=kFALSE;
890 tfile->cd();
891 tfile->ls();
892 char hname[30];
893 sprintf(hname,"TreeT%d",evNumber);
894 tracktree1.Write(hname);
895
896 TTree *fAli=gAlice->TreeK();
897 TFile *fileAli=0;
898 if (fAli) fileAli =fAli->GetCurrentFile();
899 fileAli->cd();
900 ////////////////////////////////////////////////////////////////////
901
902 printf("delete vectors\n");
903 if(np) delete [] np;
904 if(fvettid) delete [] fvettid;
905 if(fresult) {delete fresult; fresult=0;}
04b80329 906}
b48af428 907//______________________________________________________________________
04b80329 908void AliITSTrackerV1::RecursiveTracking(TList *trackITSlist) {
b48af428 909 // This function perform the recursive tracking in ITS detectors
910 // reference is a pointer to the final best track
911 // Origin A. Badala' and G.S. Pappalardo:
912 // e-mail Angela.Badala@ct.infn.it, Giuseppe.S.Pappalardo@ct.infn.it
913 // The authors thank Mariana Bondila to have help them to resolve some
914 // problems. July-2000
915
916 //Rlayer[0]=4.; Rlayer[1]=7.; Rlayer[2]=14.9;
917 // Rlayer[3]=23.8; Rlayer[4]=39.1; Rlayer[5]=43.6; //vecchio
918
919 //////////////////////
920 Float_t sigmaphil[6], sigmazl[6];
921 sigmaphil[0]=1.44e-6/(fAvrad[0]*fAvrad[0]);
922 sigmaphil[1]=1.44e-6/(fAvrad[1]*fAvrad[1]);
923 sigmaphil[2]=1.444e-5/(fAvrad[2]*fAvrad[2]);
924 sigmaphil[3]=1.444e-5/(fAvrad[3]*fAvrad[3]);
925 sigmaphil[4]=4e-6/(fAvrad[4]*fAvrad[4]);
926 sigmaphil[5]=4e-6/(fAvrad[5]*fAvrad[5]);
927 sigmazl[0]=1e-2;
928 sigmazl[1]=1e-2;
929 sigmazl[2]=7.84e-4;
930 sigmazl[3]=7.84e-4;
931 sigmazl[4]=0.6889;
932 sigmazl[5]=0.6889;
933 ///////////////////////////////////////////////////////////
934 Int_t index;
935 AliITSgeom *g1 = fITS->GetITSgeom();
936 AliITSRecPoint *recp;
937 for(index =0; index<trackITSlist->GetSize(); index++) {
938 AliITSTrackV1 *trackITS = (AliITSTrackV1 *) trackITSlist->At(index);
939 if((*trackITS).GetLayer()==7) fresult->SetChi2(10.223e140);
940 // cout <<" Layer inizio = "<<(*trackITS).GetLayer()<<"\n";
941 // cout<<"fvtrack =" <<"\n";
942 // cout << (*trackITS)(0) << " "<<(*trackITS)(1)<<" "
943 // <<(*trackITS)(2)<<" "<<(*trackITS)(3)<<" "
944 // <<(*trackITS)(4)<<"\n";
945 // cout<< " rtrack = "<<(*trackITS).Getrtrack()<<"\n";
946 // cout<< " Pt = "<<(*trackITS).GetPt()<<"\n";
947 // getchar();
948 Double_t chi2Now, chi2Ref;
949 Float_t numClustRef = fresult->GetNumClust();
950 if((*trackITS).GetLayer()==1 ) {
951 chi2Now = trackITS->GetChi2();
952 Float_t numClustNow = trackITS->GetNumClust();
953 if(trackITS->GetNumClust())
954 chi2Now /= (Double_t)trackITS->GetNumClust();
955 chi2Ref = fresult->GetChi2();
956 if(fresult->GetNumClust())
957 chi2Ref /= (Double_t)fresult->GetNumClust();
958 //cout<<" chi2Now and chi2Ref = "<<chi2Now<<" "<<chi2Ref<<"\n";
959 if( numClustNow > numClustRef ) {*fresult = *trackITS;}
960 if((numClustNow == numClustRef )&&
961 (chi2Now < chi2Ref)) {
962 *fresult = *trackITS;
963 } // end if
964 continue;
965 } // end if
966
967 if(trackITS->Getfnoclust()>=2) continue;
968 Float_t numClustNow = trackITS->GetNumClust();
969 if(numClustNow) {
970 chi2Now = trackITS->GetChi2();
971
972 if(numClustNow<numClustRef && chi2Now>fresult->GetChi2()) continue;
973 //cout<<" chi2Now = "<<chi2Now<<"\n";
64ab0d55 974
b48af428 975 chi2Now/=numClustNow;
976 if(fPtref > 1.0 && chi2Now > 30.) continue;
977 if((fPtref >= 0.6 && fPtref<=1.0) && chi2Now > 40.) continue;
978 // if((fPtref <= 0.6 && fPtref>0.2)&& chi2Now > 40.) continue;
979 // if(fPtref <= 0.2 && chi2Now > 8.) continue;
980 if((fPtref <= 0.6 && fPtref>0.2)&& chi2Now > 30.) continue;
981 if(fPtref <= 0.2 && chi2Now > 7.) continue;
982 /////////////////////////////
983 } // end if
984
985 Int_t layerInit = (*trackITS).GetLayer();
986 Int_t layernew = layerInit - 2;// -1 for new layer, -1 for matrix index
987 TList listoftrack;
988 Int_t ladp, ladm, detp,detm,ladinters,detinters;
989 Int_t layerfin=layerInit-1;
990 // cout<<"Prima di intersection \n";
b48af428 991 Int_t outinters=Intersection(*trackITS,layerfin,ladinters,detinters);
b48af428 992 // cout<<" outinters = "<<outinters<<"\n";
993 // cout<<" Layer ladder detector intersection ="
994 // <<layerfin<<" "<<ladinters<<" "<<detinters<<"\n";
995 // cout << " phiinters zinters = "<<(*trackITS)(0)
996 // << " "<<(*trackITS)(1)<<"\n"; getchar();
997 if(outinters==-1) continue;
998 Int_t flaghit=0;
999 if(outinters==0){
1000 TVector toucLad(9), toucDet(9);
1001 Int_t lycur=layerfin;
1002 ladp=ladinters+1;
1003 ladm=ladinters-1;
1004 if(ladm <= 0) ladm=fNlad[layerfin-1];
1005 if(ladp > fNlad[layerfin-1]) ladp=1;
1006 detp=detinters+1;
1007 detm=detinters-1;
1008 Int_t idetot=1;
1009 /*
1010 toucLad(0)=ladinters; toucLad(1)=ladm; toucLad(2)=ladp;
1011 toucLad(3)=ladinters; toucLad(4)=ladm; toucLad(5)=ladp;
1012 toucLad(6)=ladinters; toucLad(7)=ladm; toucLad(8)=ladp;
1013 toucDet(0)=detinters; toucDet(1)=detinters; toucDet(2)=detinters;
1014 if(detm > 0 && detp <= fNdet[layerfin-1]) {
1015 idetot=9;
1016 toucDet(3)=detm; toucDet(4)=detm; toucDet(5)=detm;
1017 toucDet(6)=detp; toucDet(7)=detp; toucDet(8)=detp;
1018 } // end if
1019 if(detm > 0 && detp > fNdet[layerfin-1]) {
1020 idetot=6;
1021 toucDet(3)=detm; toucDet(4)=detm; toucDet(5)=detm;
1022 } // end if
1023 if(detm <= 0 && detp <= fNdet[layerfin-1]) {
1024 idetot=6;
1025 toucDet(3)=detp; toucDet(4)=detp; toucDet(5)=detp;
1026 } // end if
1027 */
f66ae545 1028 Float_t epsphi=5.0, epsz=5.0;
b48af428 1029 if(fPtref<0.2) {epsphi=3.; epsz=3.;}
64ab0d55 1030 // new definition of idetot e toucLad e toucDet to be
b48af428 1031 // transformed in a method
1032 // these values could be modified
1033 Float_t pigre=TMath::Pi();
1034 Float_t rangephi=5., rangez=5.;
1035 if(layerfin==1 || layerfin ==2){
1036 rangephi=40.*epsphi*TMath::Sqrt(sigmaphil[layerfin-1]+
1037 (*trackITS).GetSigmaphi());
1038 rangez = 40.*epsz*TMath::Sqrt(sigmazl[layerfin-1]+
1039 (*trackITS).GetSigmaZ());
1040 } // end if
1041 if(layerfin==3 || layerfin ==4){
1042 //rangephi=30.*fepsphi*TMath::Sqrt(sigmaphil[layerfin-1]+
1043 // (*trackITS).GetSigmaphi());
1044 //rangez = 40.*fepsz*TMath::Sqrt(sigmazl[layerfin-1]+
1045 // (*trackITS).GetSigmaZ());
1046 rangephi=40.*epsphi*TMath::Sqrt(sigmaphil[layerfin-1]+
1047 (*trackITS).GetSigmaphi());
1048 rangez = 50.*epsz*TMath::Sqrt(sigmazl[layerfin-1]+
1049 (*trackITS).GetSigmaZ());
1050 } // end if
1051 if(layerfin==5 || layerfin ==6){
1052 rangephi=20.*epsphi*TMath::Sqrt(sigmaphil[layerfin-1]+
1053 (*trackITS).GetSigmaphi());
1054 rangez =5.*epsz*TMath::Sqrt(sigmazl[layerfin-1]+
1055 (*trackITS).GetSigmaZ());
1056 } // end if
1057 Float_t phinters, zinters;
1058 phinters=(*trackITS).Getphi();
1059 zinters=(*trackITS).GetZ();
1060 Float_t distz = 0.0;
1061 Float_t phicm, phicp, distphim, distphip;
1062 phicm=phinters;
cf411bb5 1063 if(phinters>fphimax[layerfin-1][ladm-1]) phicm=phinters-2*pigre; //corretto il 20-11-2001
1064 distphim=TMath::Abs(phicm-fphimax[layerfin-1][ladm-1]); //corretto il 20-11-2001
b48af428 1065 phicp=phinters;
cf411bb5 1066 //cout<<" fNlad[layerfin-1] e ladp = "<<fNlad[layerfin-1]<<" "<<ladp<<endl;
1067 if(phinters>fphimin[layerfin-1][ladp-1]) phicp=phinters-2.*pigre; //corretto il 20-11-2001
1068 distphip=TMath::Abs(phicp-fphimin[layerfin-1][ladp-1]); //corretto il 20-11-2001
b48af428 1069 Int_t flagzmin=0;
1070 Int_t flagzmax=0;
1071 idetot=1;
1072 toucLad(0)=ladinters; toucDet(0)=detinters;
1073 if(detm>0) distz=TMath::Abs(zinters-fzmax[layerfin-1][detm-1]);
1074 if(detm>0 && rangez>=distz){
1075 flagzmin=1;
1076 idetot++; toucLad(idetot-1)=ladinters; toucDet(idetot-1)=detm;
1077 if(rangephi>=distphim){
1078 idetot++;
1079 toucLad(idetot-1)=ladm;
1080 toucDet(idetot-1)=detinters;
1081 idetot++;
1082 toucLad(idetot-1)=ladm;
1083 toucDet(idetot-1)=detm;
1084 } // end if
1085 if(rangephi>=distphip){
1086 idetot++;
1087 toucLad(idetot-1)=ladp;
1088 toucDet(idetot-1)=detinters;
1089 idetot++;
1090 toucLad(idetot-1)=ladp;
1091 toucDet(idetot-1)=detm;
1092 } // end if
1093 } //end detm>0....
1094 if(detp<=fNdet[layerfin-1])
1095 distz=TMath::Abs(zinters-fzmin[layerfin-1][detp-1]);
1096 if(detp<=fNdet[layerfin-1] && rangez>=distz){
1097 flagzmax=1;
1098 idetot++; toucLad(idetot-1)=ladinters; toucDet(idetot-1)=detp;
1099 if(rangephi>=distphim){
1100 idetot++; toucLad(idetot-1)=ladm; toucDet(idetot-1)=detp;
1101 if(flagzmin == 0) {
1102 idetot++;
1103 toucLad(idetot-1)=ladm;
1104 toucDet(idetot-1)=detinters;
1105 } // end if
1106 } // end if
1107 if(rangephi>=distphip){
1108 idetot++;
1109 toucLad(idetot-1)=ladp;
1110 toucDet(idetot-1)=detp;
1111 if(flagzmin == 0) {
1112 idetot++;
1113 toucLad(idetot-1)=ladp;
1114 toucDet(idetot-1)=detinters;
1115 } // end if
1116 } // end if
1117 } //end detm<fNdet[.......
1118
1119 if(flagzmin == 0 && flagzmax==0){
1120 if(rangephi>=distphim){
1121 idetot++;
1122 toucLad(idetot-1)=ladm;
1123 toucDet(idetot-1)=detinters;
1124 } // end if
1125 if(rangephi>=distphip){
1126 idetot++;
1127 toucLad(idetot-1)=ladp;
1128 toucDet(idetot-1)=detinters;
1129 } // end if
1130 } // end if
1131 ////////////////////////////////////////////////////////////
1132 Int_t iriv;
1133 for (iriv=0; iriv<idetot; iriv++) { //for on detectors
1134 ///////////////////////////////////////////////////////
1135 /*** Rec points sorted by module *****/
1136 /**************************************/
64ab0d55 1137 Int_t indexmod;
b48af428 1138 indexmod = g1->GetModuleIndex(lycur,(Int_t)toucLad(iriv),
64ab0d55 1139 (Int_t)toucDet(iriv));
b48af428 1140 fITS->ResetRecPoints();
1141 gAlice->TreeR()->GetEvent(indexmod);
1142 Int_t npoints=frecPoints->GetEntries();
64ab0d55 1143
b48af428 1144 Int_t indnew;
1145 for(indnew=0; indnew<npoints; indnew++){
1146 if (*(fvettid[indexmod]+indnew)==0)
1147 recp =(AliITSRecPoint*)frecPoints->UncheckedAt(indnew);
1148 else
f66ae545 1149 continue;
b48af428 1150 TVector cluster(3),vecclust(9);
64ab0d55 1151 //vecclust(6)=vecclust(7)=vecclust(8)=-1.;
1152 Double_t sigma[2];
1153 // now vecclust is with cylindrical cohordinates
1154 vecclust(0)=(Float_t)fRecCylR[indexmod][indnew];
1155 vecclust(1)=(Float_t)fRecCylPhi[indexmod][indnew];
1156 vecclust(2)=(Float_t)fRecCylZ[indexmod][indnew];
b48af428 1157 vecclust(3) = (Float_t)recp->fTracks[0];
b48af428 1158 vecclust(4) = (Float_t)indnew;
64ab0d55 1159 vecclust(5) = (Float_t)indexmod;
b48af428 1160 vecclust(6) = (Float_t)recp->fTracks[0];
1161 vecclust(7) = (Float_t)recp->fTracks[1];
1162 vecclust(8) = (Float_t)recp->fTracks[2];
1163 sigma[0] = (Double_t) recp->GetSigmaX2();
1164 sigma[1] = (Double_t) recp->GetSigmaZ2();
64ab0d55 1165
1166 cluster(0)=fRecCylR[indexmod][indnew];
1167 cluster(1)=fRecCylPhi[indexmod][indnew];
1168 cluster(2)=fRecCylZ[indexmod][indnew];
1169
b48af428 1170 // cout<<" layer = "<<play<<"\n";
1171 // cout<<" cluster prima = "<<vecclust(0)<<" "
1172 // <<vecclust(1)<<" "
1173 // <<vecclust(2)<<"\n"; getchar();
1174
1175 Float_t sigmatotphi, sigmatotz;
1176 // Float_t epsphi=5.0, epsz=5.0;
1177 //if(fPtref<0.2) {epsphi=3.; epsz=3.;}
1178 Double_t rTrack=(*trackITS).Getrtrack();
1179 Double_t sigmaphi=sigma[0]/(rTrack*rTrack);
1180 sigmatotphi=epsphi*TMath::Sqrt(sigmaphi +
1181 (*trackITS).GetSigmaphi());
1182 sigmatotz=epsz*TMath::Sqrt(sigma[1] +
1183 (*trackITS).GetSigmaZ());
1184 //cout<<"cluster e sigmatotphi e track = "<<cluster(0)
1185 // <<" "<<cluster(1)<<" "<<sigmatotphi<<" "
1186 // <<vecclust(3)<<"\n";
1187 //if(vecclust(3)==481) getchar();
1188 if(cluster(1)<6. && (*trackITS).Getphi()>6.)
1189 cluster(1)=cluster(1)+(2.*TMath::Pi());
1190 if(cluster(1)>6. && (*trackITS).Getphi()<6.)
1191 cluster(1)=cluster(1)-(2.*TMath::Pi());
1192 if(TMath::Abs(cluster(1)-(*trackITS).Getphi())>sigmatotphi)
1193 continue;
1194 // cout<<" supero sigmaphi \n";
1195 AliITSTrackV1 *newTrack = new AliITSTrackV1((*trackITS));
1196 (*newTrack).SetLayer((*trackITS).GetLayer()-1);
1197 if (TMath::Abs(rTrack-cluster(0))/rTrack>1e-6)
1198 (*newTrack).Correct(Double_t(cluster(0)));
1199 //cout<<" cluster(2) e(*newTrack).GetZ()="<<cluster(2)<<" "
1200 // << (*newTrack).GetZ()<<"\n";
1201 if(TMath::Abs(cluster(2)-(*newTrack).GetZ()) > sigmatotz){
1202 delete newTrack;
1203 continue;
1204 } // end if
1205 Double_t sigmanew[2];
1206 sigmanew[0]= sigmaphi;
1207 sigmanew[1]=sigma[1];
1208 Double_t m[2];
1209 m[0]=cluster(1);
1210 m[1]=cluster(2);
1211 // Double_t chi2pred=newTrack->GetPredChi2(m,sigmanew);
1212 // cout<<" chi2pred = "<<chi2pred<<"\n";
1213 // if(chi2pred>fChi2max) continue; //aggiunto il 30-7-2001
1214 if(iriv == 0) flaghit=1;
1215 (*newTrack).AddMS(frl); // add the multiple scattering
1216 //matrix to the covariance matrix
1217 (*newTrack).AddEL(frl,1.,0);
1218
b48af428 1219 if(fflagvert){
1220 KalmanFilterVert(newTrack,cluster,sigmanew);
1221 //KalmanFilterVert(newTrack,cluster,sigmanew,chi2pred);
1222 }else{
1223 KalmanFilter(newTrack,cluster,sigmanew);
1224 } // end if
b48af428 1225 (*newTrack).PutCluster(layernew, vecclust);
1226 newTrack->AddClustInTrack();
1227 listoftrack.AddLast(newTrack);
1228 } // end for indnew
b48af428 1229 } // end of for on detectors (iriv)
1230 }//end if(outinters==0)
1231
1232 if(flaghit==0 || outinters==-2) {
1233 AliITSTrackV1 *newTrack = new AliITSTrackV1(*trackITS);
1234 (*newTrack).Setfnoclust();
1235 (*newTrack).SetLayer((*trackITS).GetLayer()-1);
1236 (*newTrack).AddMS(frl); // add the multiple scattering matrix
1237 // to the covariance matrix
1238 (*newTrack).AddEL(frl,1.,0);
1239 listoftrack.AddLast(newTrack);
1240 } // end if
1241
1242 //gObjectTable->Print(); // stampa memoria
04b80329 1243
b48af428 1244 RecursiveTracking(&listoftrack);
1245 listoftrack.Delete();
1246 } // end of for on tracks (index)
04b80329 1247
b48af428 1248 //gObjectTable->Print(); // stampa memoria
13888096 1249}
b48af428 1250//______________________________________________________________________
1251Int_t AliITSTrackerV1::Intersection(AliITSTrackV1 &track,Int_t layer,
1252 Int_t &ladder,Int_t &detector) {
1253 // Origin A. Badala' and G.S. Pappalardo
1254 // e-mail Angela.Badala@ct.infn.it, Giuseppe.S.Pappalardo@ct.infn.it
1255 // Found the intersection and the detector
1256
1257 Double_t rk=fAvrad[layer-1];
1258 if(track.DoNotCross(rk)){ /*cout<< " Do not cross \n";*/ return -1;}
1259 track.Propagation(rk);
1260 Double_t zinters=track.GetZ();
1261 Double_t phinters=track.Getphi();
1262 //cout<<"zinters = "<<zinters<<" phinters = "<<phinters<<"\n";
1263
1264 TVector det(9);
1265 TVector listDet(2);
1266 TVector distZCenter(2);
1267
1268 Int_t iz=0;
1269 Int_t iD;
1270 for(iD = 1; iD<= fNdet[layer-1]; iD++) {
1271 if(zinters > fzmin[layer-1][iD-1] && zinters <= fzmax[layer-1][iD-1]) {
1272 if(iz>1) {
1273 cout<< " Errore su iz in Intersection \n";
1274 getchar();
1275 }else {
1276 listDet(iz)= iD; distZCenter(iz)=TMath::Abs(zinters-det(2));
1277 iz++;
1278 } // end if
1279 } // end if
1280 } // end for iD
1281
1282 if(iz==0) {/* cout<< " No detector along Z \n";*/ return -2;}
1283 detector=Int_t (listDet(0));
1284 if(iz>1 && (distZCenter(0)>distZCenter(1))) detector=Int_t (listDet(1));
1285
1286 TVector listLad(2);
1287 TVector distPhiCenter(2);
1288 Int_t ip=0;
1289 Double_t pigre=TMath::Pi();
1290 Int_t iLd;
1291 for(iLd = 1; iLd<= fNlad[layer-1]; iLd++) {
1292 Double_t phimin=fphimin[layer-1][iLd-1];
1293 Double_t phimax=fphimax[layer-1][iLd-1];
1294 Double_t phidet=fphidet[layer-1][iLd-1];
1295 Double_t phiconfr=phinters;
1296 if(phimin>phimax) {
1297 //if(phimin <5.5) {cout<<" Error in Intersection for phi \n";
1298 // getchar();}
1299 phimin-=(2.*pigre);
1300 if(phinters>(1.5*pigre)) phiconfr=phinters-(2.*pigre);
1301 if(phidet>(1.5*pigre)) phidet-=(2.*pigre);
1302 } // end if
1303 if(phiconfr>phimin && phiconfr<= phimax) {
1304 if(ip>1) {
1305 cout<< " Errore su ip in Intersection \n"; getchar();
1306 }else {
1307 listLad(ip)= iLd;
1308 distPhiCenter(ip)=TMath::Abs(phiconfr-phidet); ip++;
1309 } // end if
1310 } // end if
1311 } // end for iLd
1312 if(ip==0) { cout<< " No detector along phi \n"; getchar();}
1313 ladder=Int_t (listLad(0));
1314 if(ip>1 && (distPhiCenter(0)>distPhiCenter(1))) ladder=Int_t (listLad(1));
1315 return 0;
1316}
1317//______________________________________________________________________
1318void AliITSTrackerV1::KalmanFilter(AliITSTrackV1 *newTrack,TVector &cluster,
1319 Double_t sigma[2]){
1320 //Origin A. Badala' and G.S. Pappalardo:
1321 // e-mail Angela.Badala@ct.infn.it, Giuseppe.S.Pappalardo@ct.infn.it
1322 // Kalman filter without vertex constraint
1323 ////// Evaluation of the measurement vector ////////////////////////
1324 Double_t m[2];
1325 Double_t rk,phik,zk;
1326 rk=cluster(0); phik=cluster(1); zk=cluster(2);
1327 m[0]=phik; m[1]=zk;
1328 //////////////////////// Evaluation of the error matrix V /////////
1329 Double_t v00=sigma[0];
1330 Double_t v11=sigma[1];
1331 ////////////////////////////////////////////////////////////////////
1332 Double_t cin00,cin10,cin20,cin30,cin40,cin11,cin21,cin31,cin41,cin22,
1333 cin32,cin42,cin33,cin43,cin44;
1334
1335 newTrack->GetCElements(cin00,
1336 cin10,cin11,
1337 cin20,cin21,cin22,
1338 cin30,cin31,cin32,cin33,
1339 cin40,cin41,cin42,cin43,cin44); //get C matrix
1340 Double_t rold00=cin00+v00;
1341 Double_t rold10=cin10;
1342 Double_t rold11=cin11+v11;
1343 ////////////////////// R matrix inversion /////////////////////////
1344 Double_t det=rold00*rold11-rold10*rold10;
1345 Double_t r00=rold11/det;
1346 Double_t r10=-rold10/det;
1347 Double_t r11=rold00/det;
1348 ////////////////////////////////////////////////////////////////////
1349 Double_t k00=cin00*r00+cin10*r10;
1350 Double_t k01=cin00*r10+cin10*r11;
1351 Double_t k10=cin10*r00+cin11*r10;
1352 Double_t k11=cin10*r10+cin11*r11;
1353 Double_t k20=cin20*r00+cin21*r10;
1354 Double_t k21=cin20*r10+cin21*r11;
1355 Double_t k30=cin30*r00+cin31*r10;
1356 Double_t k31=cin30*r10+cin31*r11;
1357 Double_t k40=cin40*r00+cin41*r10;
1358 Double_t k41=cin40*r10+cin41*r11;
1359 Double_t x0,x1,x2,x3,x4;
1360 newTrack->GetXElements(x0,x1,x2,x3,x4); // get the state vector
1361 Double_t savex0=x0, savex1=x1;
1362 x0+=k00*(m[0]-savex0)+k01*(m[1]-savex1);
1363 x1+=k10*(m[0]-savex0)+k11*(m[1]-savex1);
1364 x2+=k20*(m[0]-savex0)+k21*(m[1]-savex1);
1365 x3+=k30*(m[0]-savex0)+k31*(m[1]-savex1);
1366 x4+=k40*(m[0]-savex0)+k41*(m[1]-savex1);
1367 Double_t c00,c10,c20,c30,c40,c11,c21,c31,c41,c22,c32,c42,c33,c43,c44;
1368 c00=cin00-k00*cin00-k01*cin10;
1369 c10=cin10-k00*cin10-k01*cin11;
1370 c20=cin20-k00*cin20-k01*cin21;
1371 c30=cin30-k00*cin30-k01*cin31;
1372 c40=cin40-k00*cin40-k01*cin41;
1373 c11=cin11-k10*cin10-k11*cin11;
1374 c21=cin21-k10*cin20-k11*cin21;
1375 c31=cin31-k10*cin30-k11*cin31;
1376 c41=cin41-k10*cin40-k11*cin41;
1377 c22=cin22-k20*cin20-k21*cin21;
1378 c32=cin32-k20*cin30-k21*cin31;
1379 c42=cin42-k20*cin40-k21*cin41;
1380 c33=cin33-k30*cin30-k31*cin31;
1381 c43=cin43-k30*cin40-k31*cin41;
1382 c44=cin44-k40*cin40-k41*cin41;
1383 newTrack->PutXElements(x0,x1,x2,x3,x4); // put the new state vector
1384 newTrack->PutCElements(c00,
1385 c10,c11,
1386 c20,c21,c22,
1387 c30,c31,c32,c33,
1388 c40,c41,c42,c43,c44); // put in track the
1389 // new cov matrix
1390 Double_t vmcold00=v00-c00;
1391 Double_t vmcold10=-c10;
1392 Double_t vmcold11=v11-c11;
1393 ////////////////////// Matrix vmc inversion ///////////////////////
1394 det=vmcold00*vmcold11-vmcold10*vmcold10;
1395 Double_t vmc00=vmcold11/det;
1396 Double_t vmc10=-vmcold10/det;
1397 Double_t vmc11=vmcold00/det;
1398 ////////////////////////////////////////////////////////////////////
1399 Double_t chi2=(m[0]-x0)*( vmc00*(m[0]-x0) + 2.*vmc10*(m[1]-x1) ) +
1400 (m[1]-x1)*vmc11*(m[1]-x1);
04b80329 1401 newTrack->SetChi2(newTrack->GetChi2()+chi2);
b48af428 1402}
1403//----------------------------------------------------------------------
1404//void AliITSTrackerV1::KalmanFilterVert(AliITSTrackV1 *newTrack,
1405// TVector &cluster,Double_t sigma[2]){
1406void AliITSTrackerV1::KalmanFilterVert(AliITSTrackV1 *newTrack,
1407 TVector &cluster,Double_t sigma[2]
1408 /*, Double_t chi2pred*/){
1409 //Origin A. Badala' and G.S. Pappalardo:
1410 // e-mail Angela.Badala@ct.infn.it, Giuseppe.S.Pappalardo@ct.infn.it
1411 // Kalman filter with vertex constraint
1412 ///////////////////// Evaluation of the measurement vector m ////////
1413 Double_t m[4];
1414 Double_t rk,phik,zk;
1415 rk=cluster(0); phik=cluster(1); zk=cluster(2);
1416 m[0]=phik; m[1]=zk;
1417 Double_t cc=(*newTrack).GetC();
1418 Double_t zv=(*newTrack).GetZv();
1419 Double_t dv=(*newTrack).GetDv();
1420 Double_t cy=cc/2.;
1421 Double_t tgl= (zk-zv)*cy/TMath::ASin(cy*rk);
1422 m[2]=dv; m[3]=tgl;
1423 /////////////////////// Evaluation of the error matrix V //////////
1424 Int_t layer=newTrack->GetLayer();
1425 Double_t v00=sigma[0];
1426 Double_t v11=sigma[1];
1427 Double_t v31=sigma[1]/rk;
1428 Double_t sigmaDv=newTrack->GetsigmaDv();
1429 Double_t v22=sigmaDv*sigmaDv + newTrack->Getd2(layer-1);
1430 Double_t v32=newTrack->Getdtgl(layer-1);
1431 Double_t sigmaZv=newTrack->GetsigmaZv();
1432 Double_t v33=(sigma[1]+sigmaZv*sigmaZv)/(rk*rk)+newTrack->Gettgl2(layer-1);
1433 //////////////////////////////////////////////////////////////////
1434 Double_t cin00,cin10,cin11,cin20,cin21,cin22,
1435 cin30,cin31,cin32,cin33,cin40,cin41,cin42,cin43,cin44;
1436 newTrack->GetCElements(cin00,
1437 cin10,cin11,
1438 cin20,cin21,cin22,
1439 cin30,cin31,cin32,cin33,
1440 cin40,cin41,cin42,cin43,cin44); //get C matrix
1441 Double_t r[4][4];
1442 r[0][0]=cin00+v00;
1443 r[1][0]=cin10;
1444 r[2][0]=cin20;
1445 r[3][0]=cin30;
1446 r[1][1]=cin11+v11;
1447 r[2][1]=cin21;
1448 r[3][1]=cin31+sigma[1]/rk;
1449 r[2][2]=cin22+sigmaDv*sigmaDv+newTrack->Getd2(layer-1);
1450 r[3][2]=cin32+newTrack->Getdtgl(layer-1);
1451 r[3][3]=cin33+(sigma[1]+sigmaZv*sigmaZv)/(rk*rk)+
1452 newTrack->Gettgl2(layer-1);
1453 r[0][1]=r[1][0]; r[0][2]=r[2][0]; r[0][3]=r[3][0];
1454 r[1][2]=r[2][1]; r[1][3]=r[3][1]; r[2][3]=r[3][2];
1455 ///////////////////// Matrix R inversion //////////////////////////
1456 const Int_t kn=4;
1457 Double_t big, hold;
1458 Double_t d=1.;
1459 Int_t ll[kn],mm[kn];
1460 Int_t i,j,k;
1461
1462 for(k=0; k<kn; k++) {
1463 ll[k]=k;
1464 mm[k]=k;
1465 big=r[k][k];
1466 for(j=k; j<kn ; j++) {
1467 for (i=j; i<kn; i++) {
1468 if(TMath::Abs(big) < TMath::Abs(r[i][j]) ) {
1469 big=r[i][j];
1470 ll[k]=i;
1471 mm[k]=j;
1472 } // end if
1473 } // end for i
1474 } // end for j
1475 //
1476 j= ll[k];
1477 if(j > k) {
1478 for(i=0; i<kn; i++) {
1479 hold=-r[k][i];
1480 r[k][i]=r[j][i];
1481 r[j][i]=hold;
1482 } // end for i
1483 }// end if
1484 //
1485 i=mm[k];
1486 if(i > k ) {
1487 for(j=0; j<kn; j++) {
1488 hold=-r[j][k];
1489 r[j][k]=r[j][i];
1490 r[j][i]=hold;
1491 } // end for j
1492 } // end if
1493 //
1494 if(!big) {
1495 d=0.;
1496 cout << "Singular matrix\n";
1497 } // end if
1498 for(i=0; i<kn; i++) {
1499 if(i == k) { continue; }
1500 r[i][k]=r[i][k]/(-big);
1501 } // end for i
1502 //
1503 for(i=0; i<kn; i++) {
1504 hold=r[i][k];
1505 for(j=0; j<kn; j++) {
1506 if(i == k || j == k) continue;
1507 r[i][j]=hold*r[k][j]+r[i][j];
1508 } // end for j
1509 } // end of ri
1510 //
1511 for(j=0; j<kn; j++) {
1512 if(j == k) continue;
1513 r[k][j]=r[k][j]/big;
1514 } // end for j
1515 //
1516 d=d*big;
1517 //
1518 r[k][k]=1./big;
1519 } // end for k
1520 //
1521 for(k=kn-1; k>=0; k--) {
1522 i=ll[k];
1523 if(i > k) {
1524 for (j=0; j<kn; j++) {
1525 hold=r[j][k];
1526 r[j][k]=-r[j][i];
1527 r[j][i]=hold;
1528 } // end for j
1529 } // end if i
1530 j=mm[k];
1531 if(j > k) {
1532 for (i=0; i<kn; i++) {
1533 hold=r[k][i];
1534 r[k][i]=-r[j][i];
1535 r[j][i]=hold;
1536 } // end for i
1537 } // end if
1538 } // end for k
1539 ////////////////////////////////////////////////////////////////////
1540 Double_t k00=cin00*r[0][0]+cin10*r[1][0]+cin20*r[2][0]+cin30*r[3][0];
1541 Double_t k01=cin00*r[1][0]+cin10*r[1][1]+cin20*r[2][1]+cin30*r[3][1];
1542 Double_t k02=cin00*r[2][0]+cin10*r[2][1]+cin20*r[2][2]+cin30*r[3][2];
1543 Double_t k03=cin00*r[3][0]+cin10*r[3][1]+cin20*r[3][2]+cin30*r[3][3];
1544 Double_t k10=cin10*r[0][0]+cin11*r[1][0]+cin21*r[2][0]+cin31*r[3][0];
1545 Double_t k11=cin10*r[1][0]+cin11*r[1][1]+cin21*r[2][1]+cin31*r[3][1];
1546 Double_t k12=cin10*r[2][0]+cin11*r[2][1]+cin21*r[2][2]+cin31*r[3][2];
1547 Double_t k13=cin10*r[3][0]+cin11*r[3][1]+cin21*r[3][2]+cin31*r[3][3];
1548 Double_t k20=cin20*r[0][0]+cin21*r[1][0]+cin22*r[2][0]+cin32*r[3][0];
1549 Double_t k21=cin20*r[1][0]+cin21*r[1][1]+cin22*r[2][1]+cin32*r[3][1];
1550 Double_t k22=cin20*r[2][0]+cin21*r[2][1]+cin22*r[2][2]+cin32*r[3][2];
1551 Double_t k23=cin20*r[3][0]+cin21*r[3][1]+cin22*r[3][2]+cin32*r[3][3];
1552 Double_t k30=cin30*r[0][0]+cin31*r[1][0]+cin32*r[2][0]+cin33*r[3][0];
1553 Double_t k31=cin30*r[1][0]+cin31*r[1][1]+cin32*r[2][1]+cin33*r[3][1];
1554 Double_t k32=cin30*r[2][0]+cin31*r[2][1]+cin32*r[2][2]+cin33*r[3][2];
1555 Double_t k33=cin30*r[3][0]+cin31*r[3][1]+cin32*r[3][2]+cin33*r[3][3];
1556 Double_t k40=cin40*r[0][0]+cin41*r[1][0]+cin42*r[2][0]+cin43*r[3][0];
1557 Double_t k41=cin40*r[1][0]+cin41*r[1][1]+cin42*r[2][1]+cin43*r[3][1];
1558 Double_t k42=cin40*r[2][0]+cin41*r[2][1]+cin42*r[2][2]+cin43*r[3][2];
1559 Double_t k43=cin40*r[3][0]+cin41*r[3][1]+cin42*r[3][2]+cin43*r[3][3];
1560
1561 Double_t x0,x1,x2,x3,x4;
1562 newTrack->GetXElements(x0,x1,x2,x3,x4); // get the state vector
1563 Double_t savex0=x0, savex1=x1, savex2=x2, savex3=x3;
1564 x0+=k00*(m[0]-savex0)+k01*(m[1]-savex1)+k02*(m[2]-savex2)+
1565 k03*(m[3]-savex3);
1566 x1+=k10*(m[0]-savex0)+k11*(m[1]-savex1)+k12*(m[2]-savex2)+
1567 k13*(m[3]-savex3);
1568 x2+=k20*(m[0]-savex0)+k21*(m[1]-savex1)+k22*(m[2]-savex2)+
1569 k23*(m[3]-savex3);
1570 x3+=k30*(m[0]-savex0)+k31*(m[1]-savex1)+k32*(m[2]-savex2)+
1571 k33*(m[3]-savex3);
1572 x4+=k40*(m[0]-savex0)+k41*(m[1]-savex1)+k42*(m[2]-savex2)+
1573 k43*(m[3]-savex3);
1574 Double_t c00,c10,c20,c30,c40,c11,c21,c31,c41,c22,c32,c42,c33,c43,c44;
1575 c00=cin00-k00*cin00-k01*cin10-k02*cin20-k03*cin30;
1576 c10=cin10-k00*cin10-k01*cin11-k02*cin21-k03*cin31;
1577 c20=cin20-k00*cin20-k01*cin21-k02*cin22-k03*cin32;
1578 c30=cin30-k00*cin30-k01*cin31-k02*cin32-k03*cin33;
1579 c40=cin40-k00*cin40-k01*cin41-k02*cin42-k03*cin43;
1580 c11=cin11-k10*cin10-k11*cin11-k12*cin21-k13*cin31;
1581 c21=cin21-k10*cin20-k11*cin21-k12*cin22-k13*cin32;
1582 c31=cin31-k10*cin30-k11*cin31-k12*cin32-k13*cin33;
1583 c41=cin41-k10*cin40-k11*cin41-k12*cin42-k13*cin43;
1584 c22=cin22-k20*cin20-k21*cin21-k22*cin22-k23*cin32;
1585 c32=cin32-k20*cin30-k21*cin31-k22*cin32-k23*cin33;
1586 c42=cin42-k20*cin40-k21*cin41-k22*cin42-k23*cin43;
1587 c33=cin33-k30*cin30-k31*cin31-k32*cin32-k33*cin33;
1588 c43=cin43-k30*cin40-k31*cin41-k32*cin42-k33*cin43;
1589 c44=cin44-k40*cin40-k41*cin41-k42*cin42-k43*cin43;
1590
1591 newTrack->PutXElements(x0,x1,x2,x3,x4); // put the new state vector
1592 newTrack->PutCElements(c00,
1593 c10,c11,
1594 c20,c21,c22,
1595 c30,c31,c32,c33,
1596 c40,c41,c42,c43,c44); // put in track the
1597 // new cov matrix
1598 Double_t vmc[4][4];
1599 vmc[0][0]=v00-c00; vmc[1][0]=-c10; vmc[2][0]=-c20; vmc[3][0]=-c30;
1600 vmc[1][1]=v11-c11; vmc[2][1]=-c21; vmc[3][1]=v31-c31;
1601 vmc[2][2]=v22-c22; vmc[3][2]=v32-c32;
1602 vmc[3][3]=v33-c33;
1603 vmc[0][1]=vmc[1][0]; vmc[0][2]=vmc[2][0]; vmc[0][3]=vmc[3][0];
1604 vmc[1][2]=vmc[2][1]; vmc[1][3]=vmc[3][1];
1605 vmc[2][3]=vmc[3][2];
1606 /////////////////////// vmc matrix inversion ///////////////////////
1607 d=1.;
1608 for(k=0; k<kn; k++) {
1609 ll[k]=k;
1610 mm[k]=k;
1611 big=vmc[k][k];
1612 for(j=k; j<kn ; j++) {
1613 for (i=j; i<kn; i++) {
1614 if(TMath::Abs(big) < TMath::Abs(vmc[i][j]) ) {
1615 big=vmc[i][j];
1616 ll[k]=i;
1617 mm[k]=j;
1618 } // end if
1619 } // end for i
1620 } // end for j
1621 //
1622 j= ll[k];
1623 if(j > k) {
1624 for(i=0; i<kn; i++) {
1625 hold=-vmc[k][i];
1626 vmc[k][i]=vmc[j][i];
1627 vmc[j][i]=hold;
1628 } // end for i
1629 } // end if
1630 //
1631 i=mm[k];
1632 if(i > k ) {
1633 for(j=0; j<kn; j++) {
1634 hold=-vmc[j][k];
1635 vmc[j][k]=vmc[j][i];
1636 vmc[j][i]=hold;
1637 } // end for j
1638 } // end if
1639 //
1640 if(!big) {
1641 d=0.;
1642 cout << "Singular matrix\n";
1643 } // end if
1644 for(i=0; i<kn; i++) {
1645 if(i == k) continue;
1646 vmc[i][k]=vmc[i][k]/(-big);
1647 } // end for i
1648 //
1649 for(i=0; i<kn; i++) {
1650 hold=vmc[i][k];
1651 for(j=0; j<kn; j++) {
1652 if(i == k || j == k) continue;
1653 vmc[i][j]=hold*vmc[k][j]+vmc[i][j];
1654 } // end for j
1655 } // end for i
1656 //
1657 for(j=0; j<kn; j++) {
1658 if(j == k) continue;
1659 vmc[k][j]=vmc[k][j]/big;
1660 } // end for j
1661 //
1662 d=d*big;
1663 //
1664 vmc[k][k]=1./big;
1665 } // end for k
1666 //
1667 for(k=kn-1; k>=0; k--) {
1668 i=ll[k];
1669 if(i > k) {
1670 for (j=0; j<kn; j++) {
1671 hold=vmc[j][k];
1672 vmc[j][k]=-vmc[j][i];
1673 vmc[j][i]=hold;
1674 } // end for j
1675 } // end if i>k
1676 j=mm[k];
1677 if(j > k) {
1678 for (i=0; i<kn; i++) {
1679 hold=vmc[k][i];
1680 vmc[k][i]=-vmc[j][i];
1681 vmc[j][i]=hold;
1682 } // end for i
1683 } // end if j>k
1684 } // end for k
1685 ////////////////////////////////////////////////////////////////////
1686 Double_t chi2=(m[0]-x0)*( vmc[0][0]*(m[0]-x0) + 2.*vmc[1][0]*(m[1]-x1) +
1687 2.*vmc[2][0]*(m[2]-x2)+ 2.*vmc[3][0]*(m[3]-x3) )+
1688 (m[1]-x1)* ( vmc[1][1]*(m[1]-x1) + 2.*vmc[2][1]*(m[2]-x2)+
1689 2.*vmc[3][1]*(m[3]-x3) ) +
1690 (m[2]-x2)* ( vmc[2][2]*(m[2]-x2)+ 2.*vmc[3][2]*(m[3]-x3) ) +
1691 (m[3]-x3)*vmc[3][3]*(m[3]-x3);
1692 //cout<<" chi2 kalman = "<<chi2<<"\n"; getchar();
1693 newTrack->SetChi2(newTrack->GetChi2()+chi2);
1694 // newTrack->SetChi2(newTrack->GetChi2()+chi2pred);
1695}