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