Removing warnings (alpha)
[u/mrichter/AliRoot.git] / TPC / AliTPCtrackerMI.cxx
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1c53abe2 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
1c53abe2 16
17//-------------------------------------------------------
18// Implementation of the TPC tracker
19//
20// Origin: Marian Ivanov Marian.Ivanov@cern.ch
21//
47966a6d 22// AliTPC parallel tracker -
23// How to use? -
24// run AliTPCFindClusters.C macro - clusters neccessary for tracker are founded
25// run AliTPCFindTracksMI.C macro - to find tracks
26// tracks are written to AliTPCtracks.root file
27// for comparison also seeds are written to the same file - to special branch
1c53abe2 28//-------------------------------------------------------
47966a6d 29
30
31/* $Id$ */
32
33
1c53abe2 34#include <TObjArray.h>
35#include <TFile.h>
36#include <TTree.h>
b67e07dc 37#include <TClonesArray.h>
38
cc5e9db0 39#include "Riostream.h"
1c53abe2 40
1c53abe2 41#include "AliTPCclusterMI.h"
47966a6d 42#include "AliComplexCluster.h"
1c53abe2 43#include "AliTPCParam.h"
44#include "AliTPCClustersRow.h"
1627d1c4 45#include "AliTPCpolyTrack.h"
1c53abe2 46#include "TStopwatch.h"
91162307 47#include "AliESD.h"
48#include "AliHelix.h"
91162307 49//
50#include "AliRunLoader.h"
b67e07dc 51//
52#include "AliTPCreco.h"
53#include "AliTPCtrackerMI.h"
1c53abe2 54
55
c9427e08 56
91162307 57ClassImp(AliTPCseed)
58ClassImp(AliTPCtrackerMI)
c9427e08 59
60
b67e07dc 61class AliTPCFastMath {
91162307 62public:
b67e07dc 63 AliTPCFastMath();
91162307 64 static Double_t FastAsin(Double_t x);
65 private:
b67e07dc 66 static Double_t fgFastAsin[20000]; //lookup table for fast asin computation
91162307 67};
c9427e08 68
b67e07dc 69Double_t AliTPCFastMath::fgFastAsin[20000];
70AliTPCFastMath gAliTPCFastMath;
c9427e08 71
b67e07dc 72AliTPCFastMath::AliTPCFastMath(){
73 //
74 // initialized lookup table;
91162307 75 for (Int_t i=0;i<10000;i++){
76 fgFastAsin[2*i] = TMath::ASin(i/10000.);
77 fgFastAsin[2*i+1] = (TMath::ASin((i+1)/10000.)-fgFastAsin[2*i]);
78 }
c9427e08 79}
80
b67e07dc 81Double_t AliTPCFastMath::FastAsin(Double_t x){
82 //
83 // return asin using lookup table
91162307 84 if (x>0){
85 Int_t index = int(x*10000);
86 return fgFastAsin[2*index]+(x*10000.-index)*fgFastAsin[2*index+1];
87 }
88 x*=-1;
89 Int_t index = int(x*10000);
90 return -(fgFastAsin[2*index]+(x*10000.-index)*fgFastAsin[2*index+1]);
1c53abe2 91}
92
93
94
95
91162307 96Int_t AliTPCtrackerMI::UpdateTrack(AliTPCseed * track, Int_t accept){
b67e07dc 97 //
98 //update track information using current cluster - track->fCurrentCluster
99
1c53abe2 100
91162307 101 AliTPCclusterMI* c =track->fCurrentCluster;
102 if (accept>0) track->fCurrentClusterIndex1 |=0x8000; //sign not accepted clusters
c9427e08 103
91162307 104 UInt_t i = track->fCurrentClusterIndex1;
1c53abe2 105
106 Int_t sec=(i&0xff000000)>>24;
91162307 107 //Int_t row = (i&0x00ff0000)>>16;
1c53abe2 108 track->fRow=(i&0x00ff0000)>>16;
109 track->fSector = sec;
110 // Int_t index = i&0xFFFF;
111 if (sec>=fParam->GetNInnerSector()) track->fRow += fParam->GetNRowLow();
d26d9159 112 track->SetClusterIndex2(track->fRow, i);
91162307 113 //track->fFirstPoint = row;
114 //if ( track->fLastPoint<row) track->fLastPoint =row;
115 // if (track->fRow<0 || track->fRow>160) {
116 // printf("problem\n");
117 //}
118 if (track->fFirstPoint>track->fRow)
119 track->fFirstPoint = track->fRow;
120 if (track->fLastPoint<track->fRow)
121 track->fLastPoint = track->fRow;
122
123
124 track->fClusterPointer[track->fRow] = c;
1c53abe2 125 //
126
1c53abe2 127 Float_t angle2 = track->GetSnp()*track->GetSnp();
128 angle2 = TMath::Sqrt(angle2/(1-angle2));
129 //
130 //SET NEW Track Point
131 //
91162307 132 // if (debug)
133 {
134 AliTPCTrackerPoint &point =*(track->GetTrackPoint(track->fRow));
1c53abe2 135 //
91162307 136 point.SetSigmaY(c->GetSigmaY2()/track->fCurrentSigmaY2);
137 point.SetSigmaZ(c->GetSigmaZ2()/track->fCurrentSigmaZ2);
138 point.SetErrY(sqrt(track->fErrorY2));
139 point.SetErrZ(sqrt(track->fErrorZ2));
1c53abe2 140 //
91162307 141 point.SetX(track->GetX());
142 point.SetY(track->GetY());
143 point.SetZ(track->GetZ());
144 point.SetAngleY(angle2);
145 point.SetAngleZ(track->GetTgl());
146 if (point.fIsShared){
147 track->fErrorY2 *= 4;
148 track->fErrorZ2 *= 4;
149 }
150 }
151
152 Double_t chi2 = track->GetPredictedChi2(track->fCurrentCluster);
153 //
154 track->fErrorY2 *= 1.3;
155 track->fErrorY2 += 0.01;
156 track->fErrorZ2 *= 1.3;
157 track->fErrorZ2 += 0.005;
158 //}
159 if (accept>0) return 0;
160 if (track->GetNumberOfClusters()%20==0){
161 // if (track->fHelixIn){
162 // TClonesArray & larr = *(track->fHelixIn);
163 // Int_t ihelix = larr.GetEntriesFast();
164 // new(larr[ihelix]) AliHelix(*track) ;
165 //}
1c53abe2 166 }
91162307 167 track->fNoCluster =0;
168 return track->Update(c,chi2,i);
169}
170
171
172
173Int_t AliTPCtrackerMI::AcceptCluster(AliTPCseed * seed, AliTPCclusterMI * cluster, Float_t factor,
174 Float_t cory, Float_t corz)
175{
1c53abe2 176 //
91162307 177 // decide according desired precision to accept given
178 // cluster for tracking
179 Double_t sy2=ErrY2(seed,cluster)*cory;
180 Double_t sz2=ErrZ2(seed,cluster)*corz;
181 //sy2=ErrY2(seed,cluster)*cory;
182 //sz2=ErrZ2(seed,cluster)*cory;
1c53abe2 183
91162307 184 Double_t sdistancey2 = sy2+seed->GetSigmaY2();
185 Double_t sdistancez2 = sz2+seed->GetSigmaZ2();
186
187 Double_t rdistancey2 = (seed->fCurrentCluster->GetY()-seed->GetY())*
188 (seed->fCurrentCluster->GetY()-seed->GetY())/sdistancey2;
189 Double_t rdistancez2 = (seed->fCurrentCluster->GetZ()-seed->GetZ())*
190 (seed->fCurrentCluster->GetZ()-seed->GetZ())/sdistancez2;
191
192 Double_t rdistance2 = rdistancey2+rdistancez2;
193 //Int_t accept =0;
1c53abe2 194
91162307 195 if (rdistance2>16) return 3;
196
197
198 if ((rdistancey2>9.*factor || rdistancez2>9.*factor) && cluster->GetType()==0)
199 return 2; //suspisiouce - will be changed
200
201 if ((rdistancey2>6.25*factor || rdistancez2>6.25*factor) && cluster->GetType()>0)
202 // strict cut on overlaped cluster
203 return 2; //suspisiouce - will be changed
204
205 if ( (rdistancey2>1.*factor || rdistancez2>6.25*factor )
206 && cluster->GetType()<0){
207 seed->fNFoundable--;
208 return 2;
1c53abe2 209 }
91162307 210 return 0;
211}
212
213
1c53abe2 214
1c53abe2 215
1c53abe2 216//_____________________________________________________________________________
f8aae377 217AliTPCtrackerMI::AliTPCtrackerMI(const AliTPCParam *par):
1c53abe2 218AliTracker(), fkNIS(par->GetNInnerSector()/2), fkNOS(par->GetNOuterSector()/2)
219{
220 //---------------------------------------------------------------------
221 // The main TPC tracker constructor
222 //---------------------------------------------------------------------
223 fInnerSec=new AliTPCSector[fkNIS];
224 fOuterSec=new AliTPCSector[fkNOS];
91162307 225
1c53abe2 226 Int_t i;
227 for (i=0; i<fkNIS; i++) fInnerSec[i].Setup(par,0);
228 for (i=0; i<fkNOS; i++) fOuterSec[i].Setup(par,1);
229
230 fN=0; fSectors=0;
231
1c53abe2 232 fSeeds=0;
233 fNtracks = 0;
91162307 234 fParam = par;
235 Int_t nrowlow = par->GetNRowLow();
236 Int_t nrowup = par->GetNRowUp();
237
238
239 for (Int_t i=0;i<nrowlow;i++){
240 fXRow[i] = par->GetPadRowRadiiLow(i);
241 fPadLength[i]= par->GetPadPitchLength(0,i);
242 fYMax[i] = fXRow[i]*TMath::Tan(0.5*par->GetInnerAngle());
243 }
244
245
246 for (Int_t i=0;i<nrowup;i++){
247 fXRow[i+nrowlow] = par->GetPadRowRadiiUp(i);
248 fPadLength[i+nrowlow] = par->GetPadPitchLength(60,i);
249 fYMax[i+nrowlow] = fXRow[i+nrowlow]*TMath::Tan(0.5*par->GetOuterAngle());
250 }
251 fSeeds=0;
252 //
253 fInput = 0;
254 fOutput = 0;
255 fSeedTree = 0;
256 fTreeDebug =0;
257 fNewIO =0;
258 fDebug =0;
259 fEvent =0;
1c53abe2 260}
261
262//_____________________________________________________________________________
263AliTPCtrackerMI::~AliTPCtrackerMI() {
264 //------------------------------------------------------------------
265 // TPC tracker destructor
266 //------------------------------------------------------------------
267 delete[] fInnerSec;
268 delete[] fOuterSec;
269 if (fSeeds) {
270 fSeeds->Delete();
271 delete fSeeds;
272 }
273}
274
91162307 275void AliTPCtrackerMI::SetIO()
276{
1c53abe2 277 //
91162307 278 fNewIO = kTRUE;
279 fInput = AliRunLoader::GetTreeR("TPC", kFALSE,AliConfig::fgkDefaultEventFolderName);
d26d9159 280
91162307 281 fOutput = AliRunLoader::GetTreeT("TPC", kTRUE,AliConfig::fgkDefaultEventFolderName);
d26d9159 282 if (fOutput){
283 AliTPCtrack *iotrack= new AliTPCtrack;
284 fOutput->Branch("tracks","AliTPCtrack",&iotrack,32000,100);
285 delete iotrack;
286 }
91162307 287}
1c53abe2 288
d26d9159 289
91162307 290void AliTPCtrackerMI::SetIO(TTree * input, TTree * output, AliESD * event)
291{
1c53abe2 292
91162307 293 // set input
294 fNewIO = kFALSE;
295 fInput = 0;
296 fOutput = 0;
297 fSeedTree = 0;
298 fTreeDebug =0;
299 fInput = input;
300 if (input==0){
301 return;
302 }
303 //set output
304 fOutput = output;
305 if (output){
306 AliTPCtrack *iotrack= new AliTPCtrack;
307 // iotrack->fHelixIn = new TClonesArray("AliHelix");
308 //iotrack->fHelixOut = new TClonesArray("AliHelix");
309 fOutput->Branch("tracks","AliTPCtrack",&iotrack,32000,100);
310 delete iotrack;
311 }
312 if (output && (fDebug&2)){
313 //write the full seed information if specified in debug mode
314 //
315 fSeedTree = new TTree("Seeds","Seeds");
316 AliTPCseed * vseed = new AliTPCseed;
317 //
318 TClonesArray * arrtr = new TClonesArray("AliTPCTrackPoint",160);
319 arrtr->ExpandCreateFast(160);
320 TClonesArray * arre = new TClonesArray("AliTPCExactPoint",160);
321 //
322 vseed->fPoints = arrtr;
323 vseed->fEPoints = arre;
324 // vseed->fClusterPoints = arrcl;
325 fSeedTree->Branch("seeds","AliTPCseed",&vseed,32000,99);
326 delete arrtr;
327 delete arre;
328 fTreeDebug = new TTree("trackDebug","trackDebug");
329 TClonesArray * arrd = new TClonesArray("AliTPCTrackPoint2",0);
330 fTreeDebug->Branch("debug",&arrd,32000,99);
1c53abe2 331 }
1c53abe2 332
1c53abe2 333
91162307 334 //set ESD event
335 fEvent = event;
336}
1c53abe2 337
d26d9159 338void AliTPCtrackerMI::FillESD(TObjArray* arr)
91162307 339{
47966a6d 340 //
341 //
342 //fill esds using updated tracks
91162307 343 if (fEvent){
344 // write tracks to the event
345 // store index of the track
d26d9159 346 Int_t nseed=arr->GetEntriesFast();
91162307 347 for (Int_t i=0; i<nseed; i++) {
d26d9159 348 AliTPCseed *pt=(AliTPCseed*)arr->UncheckedAt(i);
91162307 349 if (!pt) continue;
d26d9159 350 pt->PropagateTo(fParam->GetInnerRadiusLow());
351 if (pt->GetNumberOfClusters()>70) {
352 AliESDtrack iotrack;
353 iotrack.UpdateTrackParams(pt,AliESDtrack::kTPCin);
354 //iotrack.SetTPCindex(i);
355 fEvent->AddTrack(&iotrack);
356 }
91162307 357 }
1c53abe2 358 }
d26d9159 359}
360
47966a6d 361void AliTPCtrackerMI::WriteTracks(TTree * tree)
362{
d26d9159 363 //
47966a6d 364 // write tracks from seed array to selected tree
d26d9159 365 //
366 fOutput = tree;
367 if (fOutput){
368 AliTPCtrack *iotrack= new AliTPCtrack;
369 fOutput->Branch("tracks","AliTPCtrack",&iotrack,32000,100);
370 }
371 WriteTracks();
372}
373
374void AliTPCtrackerMI::WriteTracks()
375{
376 //
377 // write tracks to the given output tree -
378 // output specified with SetIO routine
379 if (!fSeeds) return;
380 if (!fOutput){
381 SetIO();
382 }
1c53abe2 383
91162307 384 if (fOutput){
385 AliTPCtrack *iotrack= 0;
386 Int_t nseed=fSeeds->GetEntriesFast();
982aff31 387 //for (Int_t i=0; i<nseed; i++) {
388 // iotrack= (AliTPCtrack*)fSeeds->UncheckedAt(i);
389 // if (iotrack) break;
390 //}
91162307 391 //TBranch * br = fOutput->Branch("tracks","AliTPCtrack",&iotrack,32000,100);
392 TBranch * br = fOutput->GetBranch("tracks");
393 br->SetAddress(&iotrack);
394 //
395 for (Int_t i=0; i<nseed; i++) {
396 AliTPCseed *pt=(AliTPCseed*)fSeeds->UncheckedAt(i);
397 if (!pt) continue;
982aff31 398 AliTPCtrack * track = new AliTPCtrack(*pt);
399 iotrack = track;
91162307 400 pt->fLab2 =i;
401 // br->SetAddress(&iotrack);
402 fOutput->Fill();
982aff31 403 delete track;
91162307 404 iotrack =0;
405 }
982aff31 406 //fOutput->GetDirectory()->cd();
407 //fOutput->Write();
91162307 408 }
d26d9159 409 // delete iotrack;
410 //
91162307 411 if (fSeedTree){
412 //write the full seed information if specified in debug mode
413
414 AliTPCseed * vseed = new AliTPCseed;
415 //
416 TClonesArray * arrtr = new TClonesArray("AliTPCTrackPoint",160);
417 arrtr->ExpandCreateFast(160);
418 //TClonesArray * arrcl = new TClonesArray("AliTPCclusterMI",160);
419 //arrcl->ExpandCreateFast(160);
420 TClonesArray * arre = new TClonesArray("AliTPCExactPoint",160);
421 //
422 vseed->fPoints = arrtr;
423 vseed->fEPoints = arre;
424 // vseed->fClusterPoints = arrcl;
425 //TBranch * brseed = seedtree->Branch("seeds","AliTPCseed",&vseed,32000,99);
426 TBranch * brseed = fSeedTree->GetBranch("seeds");
427
428 Int_t nseed=fSeeds->GetEntriesFast();
429
430 for (Int_t i=0; i<nseed; i++) {
431 AliTPCseed *pt=(AliTPCseed*)fSeeds->UncheckedAt(i);
432 if (!pt) continue;
433 pt->fPoints = arrtr;
434 // pt->fClusterPoints = arrcl;
435 pt->fEPoints = arre;
436 pt->RebuildSeed();
437 vseed = pt;
438 brseed->SetAddress(&vseed);
439 fSeedTree->Fill();
440 pt->fPoints = 0;
441 pt->fEPoints = 0;
442 // pt->fClusterPoints = 0;
443 }
444 fSeedTree->Write();
445 if (fTreeDebug) fTreeDebug->Write();
446 }
1c53abe2 447
91162307 448}
1c53abe2 449
1c53abe2 450
1c53abe2 451
452
91162307 453Double_t AliTPCtrackerMI::ErrY2(AliTPCseed* seed, AliTPCclusterMI * cl){
454 //
455 //
456 //seed->SetErrorY2(0.1);
457 //return 0.1;
458 //calculate look-up table at the beginning
459 static Bool_t ginit = kFALSE;
460 static Float_t gnoise1,gnoise2,gnoise3;
461 static Float_t ggg1[10000];
462 static Float_t ggg2[10000];
463 static Float_t ggg3[10000];
464 static Float_t glandau1[10000];
465 static Float_t glandau2[10000];
466 static Float_t glandau3[10000];
467 //
468 static Float_t gcor01[500];
469 static Float_t gcor02[500];
470 static Float_t gcorp[500];
471 //
1c53abe2 472
91162307 473 //
474 if (ginit==kFALSE){
475 for (Int_t i=1;i<500;i++){
476 Float_t rsigma = float(i)/100.;
477 gcor02[i] = TMath::Max(0.78 +TMath::Exp(7.4*(rsigma-1.2)),0.6);
478 gcor01[i] = TMath::Max(0.72 +TMath::Exp(3.36*(rsigma-1.2)),0.6);
479 gcorp[i] = TMath::Max(TMath::Power((rsigma+0.5),1.5),1.2);
480 }
1c53abe2 481
91162307 482 //
483 for (Int_t i=3;i<10000;i++){
484 //
485 //
486 // inner sector
487 Float_t amp = float(i);
488 Float_t padlength =0.75;
489 gnoise1 = 0.0004/padlength;
490 Float_t nel = 0.268*amp;
491 Float_t nprim = 0.155*amp;
492 ggg1[i] = fParam->GetDiffT()*fParam->GetDiffT()*(2+0.001*nel/(padlength*padlength))/nel;
493 glandau1[i] = (2.+0.12*nprim)*0.5* (2.+nprim*nprim*0.001/(padlength*padlength))/nprim;
494 if (glandau1[i]>1) glandau1[i]=1;
495 glandau1[i]*=padlength*padlength/12.;
496 //
497 // outer short
498 padlength =1.;
499 gnoise2 = 0.0004/padlength;
500 nel = 0.3*amp;
501 nprim = 0.133*amp;
502 ggg2[i] = fParam->GetDiffT()*fParam->GetDiffT()*(2+0.0008*nel/(padlength*padlength))/nel;
503 glandau2[i] = (2.+0.12*nprim)*0.5*(2.+nprim*nprim*0.001/(padlength*padlength))/nprim;
504 if (glandau2[i]>1) glandau2[i]=1;
505 glandau2[i]*=padlength*padlength/12.;
506 //
507 //
508 // outer long
509 padlength =1.5;
510 gnoise3 = 0.0004/padlength;
511 nel = 0.3*amp;
512 nprim = 0.133*amp;
513 ggg3[i] = fParam->GetDiffT()*fParam->GetDiffT()*(2+0.0008*nel/(padlength*padlength))/nel;
514 glandau3[i] = (2.+0.12*nprim)*0.5*(2.+nprim*nprim*0.001/(padlength*padlength))/nprim;
515 if (glandau3[i]>1) glandau3[i]=1;
516 glandau3[i]*=padlength*padlength/12.;
517 //
518 }
519 ginit = kTRUE;
520 }
1c53abe2 521 //
522 //
91162307 523 //
524 Int_t amp = int(TMath::Abs(cl->GetQ()));
525 if (amp>9999) {
526 seed->SetErrorY2(1.);
527 return 1.;
528 }
1c53abe2 529 Float_t snoise2;
c9427e08 530 Float_t z = TMath::Abs(fParam->GetZLength()-TMath::Abs(seed->GetZ()));
91162307 531 Int_t ctype = cl->GetType();
532 Float_t padlength= GetPadPitchLength(seed->fRow);
533 Float_t angle2 = seed->GetSnp()*seed->GetSnp();
534 angle2 = angle2/(1-angle2);
535 //
536 //cluster "quality"
537 Int_t rsigmay = int(100.*cl->GetSigmaY2()/(seed->fCurrentSigmaY2));
538 Float_t res;
1c53abe2 539 //
1c53abe2 540 if (fSectors==fInnerSec){
91162307 541 snoise2 = gnoise1;
542 res = ggg1[amp]*z+glandau1[amp]*angle2;
543 if (ctype==0) res *= gcor01[rsigmay];
544 if ((ctype>0)){
545 res+=0.002;
546 res*= gcorp[rsigmay];
547 }
1c53abe2 548 }
549 else {
91162307 550 if (padlength<1.1){
551 snoise2 = gnoise2;
552 res = ggg2[amp]*z+glandau2[amp]*angle2;
553 if (ctype==0) res *= gcor02[rsigmay];
554 if ((ctype>0)){
555 res+=0.002;
556 res*= gcorp[rsigmay];
557 }
558 }
559 else{
560 snoise2 = gnoise3;
561 res = ggg3[amp]*z+glandau3[amp]*angle2;
562 if (ctype==0) res *= gcor02[rsigmay];
563 if ((ctype>0)){
564 res+=0.002;
565 res*= gcorp[rsigmay];
566 }
567 }
568 }
1c53abe2 569
91162307 570 if (ctype<0){
571 res+=0.005;
572 res*=2.4; // overestimate error 2 times
573 }
574 res+= snoise2;
575
1c53abe2 576 if (res<2*snoise2)
91162307 577 res = 2*snoise2;
578
579 seed->SetErrorY2(res);
1c53abe2 580 return res;
1c53abe2 581
582
91162307 583}
c9427e08 584
585
586
91162307 587Double_t AliTPCtrackerMI::ErrZ2(AliTPCseed* seed, AliTPCclusterMI * cl){
588 //
589 //
590 //seed->SetErrorY2(0.1);
591 //return 0.1;
592 //calculate look-up table at the beginning
593 static Bool_t ginit = kFALSE;
594 static Float_t gnoise1,gnoise2,gnoise3;
595 static Float_t ggg1[10000];
596 static Float_t ggg2[10000];
597 static Float_t ggg3[10000];
598 static Float_t glandau1[10000];
599 static Float_t glandau2[10000];
600 static Float_t glandau3[10000];
601 //
602 static Float_t gcor01[1000];
603 static Float_t gcor02[1000];
604 static Float_t gcorp[1000];
1627d1c4 605 //
1627d1c4 606
91162307 607 //
608 if (ginit==kFALSE){
609 for (Int_t i=1;i<1000;i++){
610 Float_t rsigma = float(i)/100.;
611 gcor02[i] = TMath::Max(0.81 +TMath::Exp(6.8*(rsigma-1.2)),0.6);
612 gcor01[i] = TMath::Max(0.72 +TMath::Exp(2.04*(rsigma-1.2)),0.6);
613 gcorp[i] = TMath::Max(TMath::Power((rsigma+0.5),1.5),1.2);
614 }
1c53abe2 615
91162307 616 //
617 for (Int_t i=3;i<10000;i++){
618 //
619 //
620 // inner sector
621 Float_t amp = float(i);
622 Float_t padlength =0.75;
623 gnoise1 = 0.0004/padlength;
624 Float_t nel = 0.268*amp;
625 Float_t nprim = 0.155*amp;
626 ggg1[i] = fParam->GetDiffT()*fParam->GetDiffT()*(2+0.001*nel/(padlength*padlength))/nel;
627 glandau1[i] = (2.+0.12*nprim)*0.5* (2.+nprim*nprim*0.001/(padlength*padlength))/nprim;
628 if (glandau1[i]>1) glandau1[i]=1;
629 glandau1[i]*=padlength*padlength/12.;
630 //
631 // outer short
632 padlength =1.;
633 gnoise2 = 0.0004/padlength;
634 nel = 0.3*amp;
635 nprim = 0.133*amp;
636 ggg2[i] = fParam->GetDiffT()*fParam->GetDiffT()*(2+0.0008*nel/(padlength*padlength))/nel;
637 glandau2[i] = (2.+0.12*nprim)*0.5*(2.+nprim*nprim*0.001/(padlength*padlength))/nprim;
638 if (glandau2[i]>1) glandau2[i]=1;
639 glandau2[i]*=padlength*padlength/12.;
640 //
641 //
642 // outer long
643 padlength =1.5;
644 gnoise3 = 0.0004/padlength;
645 nel = 0.3*amp;
646 nprim = 0.133*amp;
647 ggg3[i] = fParam->GetDiffT()*fParam->GetDiffT()*(2+0.0008*nel/(padlength*padlength))/nel;
648 glandau3[i] = (2.+0.12*nprim)*0.5*(2.+nprim*nprim*0.001/(padlength*padlength))/nprim;
649 if (glandau3[i]>1) glandau3[i]=1;
650 glandau3[i]*=padlength*padlength/12.;
651 //
652 }
653 ginit = kTRUE;
654 }
655 //
656 //
657 //
658 Int_t amp = int(TMath::Abs(cl->GetQ()));
659 if (amp>9999) {
660 seed->SetErrorY2(1.);
661 return 1.;
662 }
663 Float_t snoise2;
664 Float_t z = TMath::Abs(fParam->GetZLength()-TMath::Abs(seed->GetZ()));
665 Int_t ctype = cl->GetType();
666 Float_t padlength= GetPadPitchLength(seed->fRow);
667 //
668 Float_t angle2 = seed->GetSnp()*seed->GetSnp();
669 // if (angle2<0.6) angle2 = 0.6;
670 angle2 = seed->GetTgl()*seed->GetTgl()*(1+angle2/(1-angle2));
671 //
672 //cluster "quality"
673 Int_t rsigmaz = int(100.*cl->GetSigmaZ2()/(seed->fCurrentSigmaZ2));
674 Float_t res;
675 //
676 if (fSectors==fInnerSec){
677 snoise2 = gnoise1;
678 res = ggg1[amp]*z+glandau1[amp]*angle2;
679 if (ctype==0) res *= gcor01[rsigmaz];
680 if ((ctype>0)){
681 res+=0.002;
682 res*= gcorp[rsigmaz];
683 }
684 }
685 else {
686 if (padlength<1.1){
687 snoise2 = gnoise2;
688 res = ggg2[amp]*z+glandau2[amp]*angle2;
689 if (ctype==0) res *= gcor02[rsigmaz];
690 if ((ctype>0)){
691 res+=0.002;
692 res*= gcorp[rsigmaz];
693 }
694 }
695 else{
696 snoise2 = gnoise3;
697 res = ggg3[amp]*z+glandau3[amp]*angle2;
698 if (ctype==0) res *= gcor02[rsigmaz];
699 if ((ctype>0)){
700 res+=0.002;
701 res*= gcorp[rsigmaz];
702 }
703 }
704 }
705
706 if (ctype<0){
707 res+=0.002;
708 res*=1.3;
709 }
710 if ((ctype<0) &&amp<70){
711 res+=0.002;
712 res*=1.3;
713 }
714 res += snoise2;
715 if (res<2*snoise2)
716 res = 2*snoise2;
717 if (res>3) res =3;
718 seed->SetErrorZ2(res);
719 return res;
720}
721
722
723
724/*
725Double_t AliTPCtrackerMI::ErrZ2(AliTPCseed* seed, AliTPCclusterMI * cl){
726 //
727 //
728 //seed->SetErrorZ2(0.1);
729 //return 0.1;
730
731 Float_t snoise2;
732 Float_t z = TMath::Abs(fParam->GetZLength()-TMath::Abs(seed->GetZ()));
733 //
734 Float_t rsigmaz = cl->GetSigmaZ2()/(seed->fCurrentSigmaZ2);
735 Int_t ctype = cl->GetType();
736 Float_t amp = TMath::Abs(cl->GetQ());
737
738 Float_t nel;
739 Float_t nprim;
740 //
741 Float_t landau=2 ; //landau fluctuation part
742 Float_t gg=2; // gg fluctuation part
743 Float_t padlength= GetPadPitchLength(seed->GetX());
744
745 if (fSectors==fInnerSec){
746 snoise2 = 0.0004/padlength;
747 nel = 0.268*amp;
748 nprim = 0.155*amp;
749 gg = (2+0.001*nel/(padlength*padlength))/nel;
750 landau = (2.+0.12*nprim)*0.5*(2.+nprim*nprim*0.001/(padlength*padlength))/nprim;
751 if (landau>1) landau=1;
752 }
753 else {
754 snoise2 = 0.0004/padlength;
755 nel = 0.3*amp;
756 nprim = 0.133*amp;
757 gg = (2+0.0008*nel/(padlength*padlength))/nel;
758 landau = (2.+0.12*nprim)*0.5*(2.+nprim*nprim*0.001/(padlength*padlength))/nprim;
759 if (landau>1) landau=1;
760 }
761 Float_t sdiff = gg*fParam->GetDiffT()*fParam->GetDiffT()*z;
762
763 //
764 Float_t angle2 = seed->GetSnp()*seed->GetSnp();
765 angle2 = TMath::Sqrt((1-angle2));
766 if (angle2<0.6) angle2 = 0.6;
767 //angle2 = 1;
768
769 Float_t angle = seed->GetTgl()/angle2;
770 Float_t angular = landau*angle*angle*padlength*padlength/12.;
771 Float_t res = sdiff + angular;
772
773
774 if ((ctype==0) && (fSectors ==fOuterSec))
775 res *= 0.81 +TMath::Exp(6.8*(rsigmaz-1.2));
776
777 if ((ctype==0) && (fSectors ==fInnerSec))
778 res *= 0.72 +TMath::Exp(2.04*(rsigmaz-1.2));
779
780 if ((ctype>0)){
781 res+=0.005;
782 res*= TMath::Power(rsigmaz+0.5,1.5); //0.31+0.147*ctype;
783 }
784 if (ctype<0){
785 res+=0.002;
786 res*=1.3;
787 }
788 if ((ctype<0) &&amp<70){
789 res+=0.002;
790 res*=1.3;
791 }
792 res += snoise2;
793 if (res<2*snoise2)
794 res = 2*snoise2;
795
796 seed->SetErrorZ2(res);
797 return res;
798}
799*/
800
801
802
803void AliTPCseed::Reset(Bool_t all)
804{
805 //
806 //
807 SetNumberOfClusters(0);
808 fNFoundable = 0;
809 SetChi2(0);
810 ResetCovariance();
811 /*
812 if (fTrackPoints){
813 for (Int_t i=0;i<8;i++){
814 delete [] fTrackPoints[i];
815 }
816 delete fTrackPoints;
817 fTrackPoints =0;
818 }
819 */
820
821 if (all){
822 for (Int_t i=0;i<200;i++) SetClusterIndex2(i,-3);
823 for (Int_t i=0;i<160;i++) fClusterPointer[i]=0;
824 }
825
826}
827
828
829void AliTPCseed::Modify(Double_t factor)
830{
831
832 //------------------------------------------------------------------
833 //This function makes a track forget its history :)
834 //------------------------------------------------------------------
835 if (factor<=0) {
836 ResetCovariance();
837 return;
838 }
839 fC00*=factor;
982aff31 840 fC10*=0; fC11*=factor;
841 fC20*=0; fC21*=0; fC22*=factor;
842 fC30*=0; fC31*=0; fC32*=0; fC33*=factor;
843 fC40*=0; fC41*=0; fC42*=0; fC43*=0; fC44*=factor;
91162307 844 SetNumberOfClusters(0);
845 fNFoundable =0;
846 SetChi2(0);
847 fRemoval = 0;
848 fCurrentSigmaY2 = 0.000005;
849 fCurrentSigmaZ2 = 0.000005;
850 fNoCluster = 0;
851 //fFirstPoint = 160;
852 //fLastPoint = 0;
853}
854
855
856
857
858Int_t AliTPCseed::GetProlongation(Double_t xk, Double_t &y, Double_t & z) const
859{
860 //-----------------------------------------------------------------
861 // This function find proloncation of a track to a reference plane x=xk.
862 // doesn't change internal state of the track
863 //-----------------------------------------------------------------
864
1c53abe2 865 Double_t x1=fX, x2=x1+(xk-x1), dx=x2-x1;
91162307 866
867 if (TMath::Abs(fP4*xk - fP2) >= 0.999) {
868 return 0;
869 }
870
1c53abe2 871 // Double_t y1=fP0, z1=fP1;
872 Double_t c1=fP4*x1 - fP2, r1=sqrt(1.- c1*c1);
873 Double_t c2=fP4*x2 - fP2, r2=sqrt(1.- c2*c2);
874
875 y = fP0;
876 z = fP1;
91162307 877 //y += dx*(c1+c2)/(r1+r2);
878 //z += dx*(c1+c2)/(c1*r2 + c2*r1)*fP3;
879
880 Double_t dy = dx*(c1+c2)/(r1+r2);
881 Double_t dz = 0;
882 //
883 Double_t delta = fP4*dx*(c1+c2)/(c1*r2 + c2*r1);
884 /*
885 if (TMath::Abs(delta)>0.0001){
886 dz = fP3*TMath::ASin(delta)/fP4;
887 }else{
888 dz = dx*fP3*(c1+c2)/(c1*r2 + c2*r1);
889 }
890 */
b67e07dc 891 dz = fP3*AliTPCFastMath::FastAsin(delta)/fP4;
91162307 892 //
893 y+=dy;
894 z+=dz;
895
896
897 return 1;
1c53abe2 898}
899
900
901//_____________________________________________________________________________
902Double_t AliTPCseed::GetPredictedChi2(const AliTPCclusterMI *c) const
903{
904 //-----------------------------------------------------------------
905 // This function calculates a predicted chi2 increment.
906 //-----------------------------------------------------------------
907 //Double_t r00=c->GetSigmaY2(), r01=0., r11=c->GetSigmaZ2();
908 Double_t r00=fErrorY2, r01=0., r11=fErrorZ2;
909 r00+=fC00; r01+=fC10; r11+=fC11;
910
911 Double_t det=r00*r11 - r01*r01;
912 if (TMath::Abs(det) < 1.e-10) {
913 Int_t n=GetNumberOfClusters();
914 if (n>4) cerr<<n<<" AliKalmanTrack warning: Singular matrix !\n";
915 return 1e10;
916 }
917 Double_t tmp=r00; r00=r11; r11=tmp; r01=-r01;
918
919 Double_t dy=c->GetY() - fP0, dz=c->GetZ() - fP1;
920
921 return (dy*r00*dy + 2*r01*dy*dz + dz*r11*dz)/det;
922}
923
924
925//_________________________________________________________________________________________
926
927
928Int_t AliTPCseed::Compare(const TObject *o) const {
929 //-----------------------------------------------------------------
930 // This function compares tracks according to the sector - for given sector according z
931 //-----------------------------------------------------------------
932 AliTPCseed *t=(AliTPCseed*)o;
1c53abe2 933
91162307 934 if (fSort == 0){
935 if (t->fRelativeSector>fRelativeSector) return -1;
936 if (t->fRelativeSector<fRelativeSector) return 1;
937 Double_t z2 = t->GetZ();
938 Double_t z1 = GetZ();
939 if (z2>z1) return 1;
940 if (z2<z1) return -1;
941 return 0;
942 }
943 else {
944 Float_t f2 =1;
945 f2 = 1-20*TMath::Sqrt(t->fC44)/(TMath::Abs(t->GetC())+0.0066);
946 if (t->fBConstrain) f2=1.2;
947
948 Float_t f1 =1;
949 f1 = 1-20*TMath::Sqrt(fC44)/(TMath::Abs(GetC())+0.0066);
950
951 if (fBConstrain) f1=1.2;
952
953 if (t->GetNumberOfClusters()*f2 <GetNumberOfClusters()*f1) return -1;
954 else return +1;
955 }
1c53abe2 956}
957
c9427e08 958void AliTPCtrackerMI::RotateToLocal(AliTPCseed *seed)
959{
960 //rotate to track "local coordinata
961 Float_t x = seed->GetX();
962 Float_t y = seed->GetY();
963 Float_t ymax = x*TMath::Tan(0.5*fSectors->GetAlpha());
91162307 964
c9427e08 965 if (y > ymax) {
966 seed->fRelativeSector= (seed->fRelativeSector+1) % fN;
967 if (!seed->Rotate(fSectors->GetAlpha()))
968 return;
969 } else if (y <-ymax) {
970 seed->fRelativeSector= (seed->fRelativeSector-1+fN) % fN;
971 if (!seed->Rotate(-fSectors->GetAlpha()))
972 return;
973 }
1c53abe2 974
c9427e08 975}
1c53abe2 976
977
978
979
980//_____________________________________________________________________________
176aff27 981Int_t AliTPCseed::Update(const AliTPCclusterMI *c, Double_t chisq, UInt_t /*index*/) {
1c53abe2 982 //-----------------------------------------------------------------
983 // This function associates a cluster with this track.
984 //-----------------------------------------------------------------
1c53abe2 985 Double_t r00=fErrorY2, r01=0., r11=fErrorZ2;
986
987 r00+=fC00; r01+=fC10; r11+=fC11;
988 Double_t det=r00*r11 - r01*r01;
989 Double_t tmp=r00; r00=r11/det; r11=tmp/det; r01=-r01/det;
990
991 Double_t k00=fC00*r00+fC10*r01, k01=fC00*r01+fC10*r11;
992 Double_t k10=fC10*r00+fC11*r01, k11=fC10*r01+fC11*r11;
993 Double_t k20=fC20*r00+fC21*r01, k21=fC20*r01+fC21*r11;
994 Double_t k30=fC30*r00+fC31*r01, k31=fC30*r01+fC31*r11;
995 Double_t k40=fC40*r00+fC41*r01, k41=fC40*r01+fC41*r11;
996
997 Double_t dy=c->GetY() - fP0, dz=c->GetZ() - fP1;
998 Double_t cur=fP4 + k40*dy + k41*dz, eta=fP2 + k20*dy + k21*dz;
1627d1c4 999 if (TMath::Abs(cur*fX-eta) >= 0.9) {
1c53abe2 1000 return 0;
1001 }
1002
1003 fP0 += k00*dy + k01*dz;
1004 fP1 += k10*dy + k11*dz;
1005 fP2 = eta;
1006 fP3 += k30*dy + k31*dz;
1007 fP4 = cur;
1008
1009 Double_t c01=fC10, c02=fC20, c03=fC30, c04=fC40;
1010 Double_t c12=fC21, c13=fC31, c14=fC41;
1011
1012 fC00-=k00*fC00+k01*fC10; fC10-=k00*c01+k01*fC11;
1013 fC20-=k00*c02+k01*c12; fC30-=k00*c03+k01*c13;
1014 fC40-=k00*c04+k01*c14;
1015
1016 fC11-=k10*c01+k11*fC11;
1017 fC21-=k10*c02+k11*c12; fC31-=k10*c03+k11*c13;
1018 fC41-=k10*c04+k11*c14;
1019
1020 fC22-=k20*c02+k21*c12; fC32-=k20*c03+k21*c13;
1021 fC42-=k20*c04+k21*c14;
1022
1023 fC33-=k30*c03+k31*c13;
1024 fC43-=k40*c03+k41*c13;
1025
1026 fC44-=k40*c04+k41*c14;
1027
1028 Int_t n=GetNumberOfClusters();
91162307 1029 // fIndex[n]=index;
1c53abe2 1030 SetNumberOfClusters(n+1);
1031 SetChi2(GetChi2()+chisq);
1032
1033 return 1;
1034}
1035
1036
1037
1038//_____________________________________________________________________________
b67e07dc 1039Double_t AliTPCtrackerMI::F1old(Double_t x1,Double_t y1,
1c53abe2 1040 Double_t x2,Double_t y2,
1041 Double_t x3,Double_t y3)
1042{
1043 //-----------------------------------------------------------------
1044 // Initial approximation of the track curvature
1045 //-----------------------------------------------------------------
1046 Double_t d=(x2-x1)*(y3-y2)-(x3-x2)*(y2-y1);
1047 Double_t a=0.5*((y3-y2)*(y2*y2-y1*y1+x2*x2-x1*x1)-
1048 (y2-y1)*(y3*y3-y2*y2+x3*x3-x2*x2));
1049 Double_t b=0.5*((x2-x1)*(y3*y3-y2*y2+x3*x3-x2*x2)-
1050 (x3-x2)*(y2*y2-y1*y1+x2*x2-x1*x1));
1051
1052 Double_t xr=TMath::Abs(d/(d*x1-a)), yr=d/(d*y1-b);
91162307 1053 if ( xr*xr+yr*yr<=0.00000000000001) return 100;
1c53abe2 1054 return -xr*yr/sqrt(xr*xr+yr*yr);
1055}
1056
1057
91162307 1058
1c53abe2 1059//_____________________________________________________________________________
b67e07dc 1060Double_t AliTPCtrackerMI::F1(Double_t x1,Double_t y1,
91162307 1061 Double_t x2,Double_t y2,
1062 Double_t x3,Double_t y3)
1063{
1064 //-----------------------------------------------------------------
1065 // Initial approximation of the track curvature
1066 //-----------------------------------------------------------------
1067 x3 -=x1;
1068 x2 -=x1;
1069 y3 -=y1;
1070 y2 -=y1;
1071 //
1072 Double_t det = x3*y2-x2*y3;
1073 if (det==0) {
1074 return 100;
1075 }
1076 //
1077 Double_t u = 0.5* (x2*(x2-x3)+y2*(y2-y3))/det;
1078 Double_t x0 = x3*0.5-y3*u;
1079 Double_t y0 = y3*0.5+x3*u;
1080 Double_t c2 = 1/TMath::Sqrt(x0*x0+y0*y0);
1081 if (det<0) c2*=-1;
1082 return c2;
1083}
1084
1085
b67e07dc 1086Double_t AliTPCtrackerMI::F2(Double_t x1,Double_t y1,
1c53abe2 1087 Double_t x2,Double_t y2,
1088 Double_t x3,Double_t y3)
91162307 1089{
1090 //-----------------------------------------------------------------
1091 // Initial approximation of the track curvature
1092 //-----------------------------------------------------------------
1093 x3 -=x1;
1094 x2 -=x1;
1095 y3 -=y1;
1096 y2 -=y1;
1097 //
1098 Double_t det = x3*y2-x2*y3;
1099 if (det==0) {
1100 return 100;
1101 }
1102 //
1103 Double_t u = 0.5* (x2*(x2-x3)+y2*(y2-y3))/det;
1104 Double_t x0 = x3*0.5-y3*u;
1105 Double_t y0 = y3*0.5+x3*u;
1106 Double_t c2 = 1/TMath::Sqrt(x0*x0+y0*y0);
1107 if (det<0) c2*=-1;
1108 x0+=x1;
1109 x0*=c2;
1110 return x0;
1111}
1112
1113
1114
1115//_____________________________________________________________________________
b67e07dc 1116Double_t AliTPCtrackerMI::F2old(Double_t x1,Double_t y1,
91162307 1117 Double_t x2,Double_t y2,
1118 Double_t x3,Double_t y3)
1c53abe2 1119{
1120 //-----------------------------------------------------------------
1121 // Initial approximation of the track curvature times center of curvature
1122 //-----------------------------------------------------------------
1123 Double_t d=(x2-x1)*(y3-y2)-(x3-x2)*(y2-y1);
1124 Double_t a=0.5*((y3-y2)*(y2*y2-y1*y1+x2*x2-x1*x1)-
1125 (y2-y1)*(y3*y3-y2*y2+x3*x3-x2*x2));
1126 Double_t b=0.5*((x2-x1)*(y3*y3-y2*y2+x3*x3-x2*x2)-
1127 (x3-x2)*(y2*y2-y1*y1+x2*x2-x1*x1));
1128
1129 Double_t xr=TMath::Abs(d/(d*x1-a)), yr=d/(d*y1-b);
1130
1131 return -a/(d*y1-b)*xr/sqrt(xr*xr+yr*yr);
1132}
1133
1134//_____________________________________________________________________________
b67e07dc 1135Double_t AliTPCtrackerMI::F3(Double_t x1,Double_t y1,
1c53abe2 1136 Double_t x2,Double_t y2,
1137 Double_t z1,Double_t z2)
1138{
1139 //-----------------------------------------------------------------
1140 // Initial approximation of the tangent of the track dip angle
1141 //-----------------------------------------------------------------
1142 return (z1 - z2)/sqrt((x1-x2)*(x1-x2)+(y1-y2)*(y1-y2));
1143}
1144
1145
b67e07dc 1146Double_t AliTPCtrackerMI::F3n(Double_t x1,Double_t y1,
91162307 1147 Double_t x2,Double_t y2,
1148 Double_t z1,Double_t z2, Double_t c)
1c53abe2 1149{
91162307 1150 //-----------------------------------------------------------------
1151 // Initial approximation of the tangent of the track dip angle
1152 //-----------------------------------------------------------------
1153
1154 // Double_t angle1;
1155
1156 //angle1 = (z1-z2)*c/(TMath::ASin(c*x1-ni)-TMath::ASin(c*x2-ni));
1c53abe2 1157 //
91162307 1158 Double_t d = TMath::Sqrt((x1-x2)*(x1-x2)+(y1-y2)*(y1-y2));
1159 if (TMath::Abs(d*c*0.5)>1) return 0;
1160 // Double_t angle2 = TMath::ASin(d*c*0.5);
b67e07dc 1161 // Double_t angle2 = AliTPCFastMath::FastAsin(d*c*0.5);
1162 Double_t angle2 = (d*c*0.5>0.1)? TMath::ASin(d*c*0.5): AliTPCFastMath::FastAsin(d*c*0.5);
91162307 1163
1164 angle2 = (z1-z2)*c/(angle2*2.);
1165 return angle2;
1166}
1167
1168Bool_t AliTPCtrackerMI::GetProlongation(Double_t x1, Double_t x2, Double_t x[5], Double_t &y, Double_t &z)
1169{//-----------------------------------------------------------------
1170 // This function find proloncation of a track to a reference plane x=x2.
1171 //-----------------------------------------------------------------
1172
1173 Double_t dx=x2-x1;
1174
1175 if (TMath::Abs(x[4]*x1 - x[2]) >= 0.999) {
1176 return kFALSE;
1c53abe2 1177 }
f8aae377 1178
91162307 1179 Double_t c1=x[4]*x1 - x[2], r1=sqrt(1.- c1*c1);
1180 Double_t c2=x[4]*x2 - x[2], r2=sqrt(1.- c2*c2);
1181 y = x[0];
1182 z = x[1];
1183
1184 Double_t dy = dx*(c1+c2)/(r1+r2);
1185 Double_t dz = 0;
1186 //
1187 Double_t delta = x[4]*dx*(c1+c2)/(c1*r2 + c2*r1);
1188
1189 if (TMath::Abs(delta)>0.01){
1190 dz = x[3]*TMath::ASin(delta)/x[4];
1191 }else{
b67e07dc 1192 dz = x[3]*AliTPCFastMath::FastAsin(delta)/x[4];
91162307 1193 }
1194
b67e07dc 1195 //dz = x[3]*AliTPCFastMath::FastAsin(delta)/x[4];
f8aae377 1196
91162307 1197 y+=dy;
1198 z+=dz;
1199
1200 return kTRUE;
1c53abe2 1201}
1202
d26d9159 1203Int_t AliTPCtrackerMI::LoadClusters (TTree *tree)
1204{
1205 //
1206 //
1207 fInput = tree;
1208 return LoadClusters();
1209}
91162307 1210
1211Int_t AliTPCtrackerMI::LoadClusters()
1c53abe2 1212{
1213 //
1214 // load clusters to the memory
91162307 1215 AliTPCClustersRow *clrow= new AliTPCClustersRow;
1216 clrow->SetClass("AliTPCclusterMI");
1217 clrow->SetArray(0);
1218 clrow->GetArray()->ExpandCreateFast(10000);
1219 //
1220 // TTree * tree = fClustersArray.GetTree();
1221
1222 TTree * tree = fInput;
1223 TBranch * br = tree->GetBranch("Segment");
1224 br->SetAddress(&clrow);
1225 //
1226 Int_t j=Int_t(tree->GetEntries());
1c53abe2 1227 for (Int_t i=0; i<j; i++) {
91162307 1228 br->GetEntry(i);
1229 //
1230 Int_t sec,row;
1231 fParam->AdjustSectorRow(clrow->GetID(),sec,row);
1232 //
1233 AliTPCRow * tpcrow=0;
1234 Int_t left=0;
1235 if (sec<fkNIS*2){
1236 tpcrow = &(fInnerSec[sec%fkNIS][row]);
1237 left = sec/fkNIS;
1238 }
1239 else{
1240 tpcrow = &(fOuterSec[(sec-fkNIS*2)%fkNOS][row]);
1241 left = (sec-fkNIS*2)/fkNOS;
1242 }
1243 if (left ==0){
1244 tpcrow->fN1 = clrow->GetArray()->GetEntriesFast();
1245 tpcrow->fClusters1 = new AliTPCclusterMI[tpcrow->fN1];
1246 for (Int_t i=0;i<tpcrow->fN1;i++)
1247 tpcrow->fClusters1[i] = *(AliTPCclusterMI*)(clrow->GetArray()->At(i));
1248 }
1249 if (left ==1){
1250 tpcrow->fN2 = clrow->GetArray()->GetEntriesFast();
1251 tpcrow->fClusters2 = new AliTPCclusterMI[tpcrow->fN2];
1252 for (Int_t i=0;i<tpcrow->fN2;i++)
1253 tpcrow->fClusters2[i] = *(AliTPCclusterMI*)(clrow->GetArray()->At(i));
1254 }
1c53abe2 1255 }
91162307 1256 //
1257 delete clrow;
1258 LoadOuterSectors();
1259 LoadInnerSectors();
1260 return 0;
1c53abe2 1261}
1262
1263
91162307 1264void AliTPCtrackerMI::UnloadClusters()
1265{
1266 //
1267 // unload clusters from the memory
1268 //
1269 Int_t nrows = fOuterSec->GetNRows();
1270 for (Int_t sec = 0;sec<fkNOS;sec++)
1271 for (Int_t row = 0;row<nrows;row++){
1272 AliTPCRow* tpcrow = &(fOuterSec[sec%fkNOS][row]);
982aff31 1273 // if (tpcrow){
1274 // if (tpcrow->fClusters1) delete []tpcrow->fClusters1;
1275 // if (tpcrow->fClusters2) delete []tpcrow->fClusters2;
1276 //}
1277 tpcrow->ResetClusters();
1c53abe2 1278 }
91162307 1279 //
1280 nrows = fInnerSec->GetNRows();
1281 for (Int_t sec = 0;sec<fkNIS;sec++)
1282 for (Int_t row = 0;row<nrows;row++){
1283 AliTPCRow* tpcrow = &(fInnerSec[sec%fkNIS][row]);
982aff31 1284 //if (tpcrow){
1285 // if (tpcrow->fClusters1) delete []tpcrow->fClusters1;
1286 //if (tpcrow->fClusters2) delete []tpcrow->fClusters2;
1287 //}
1288 tpcrow->ResetClusters();
91162307 1289 }
1290
1291 return ;
1c53abe2 1292}
1293
1294
1295//_____________________________________________________________________________
91162307 1296Int_t AliTPCtrackerMI::LoadOuterSectors() {
1c53abe2 1297 //-----------------------------------------------------------------
91162307 1298 // This function fills outer TPC sectors with clusters.
1c53abe2 1299 //-----------------------------------------------------------------
91162307 1300 Int_t nrows = fOuterSec->GetNRows();
1301 UInt_t index=0;
1302 for (Int_t sec = 0;sec<fkNOS;sec++)
1303 for (Int_t row = 0;row<nrows;row++){
1304 AliTPCRow* tpcrow = &(fOuterSec[sec%fkNOS][row]);
1305 Int_t sec2 = sec+2*fkNIS;
1306 //left
1307 Int_t ncl = tpcrow->fN1;
1308 while (ncl--) {
1309 AliTPCclusterMI *c= &(tpcrow->fClusters1[ncl]);
1310 index=(((sec2<<8)+row)<<16)+ncl;
1311 tpcrow->InsertCluster(c,index);
1312 }
1313 //right
1314 ncl = tpcrow->fN2;
1315 while (ncl--) {
1316 AliTPCclusterMI *c= &(tpcrow->fClusters2[ncl]);
1317 index=((((sec2+fkNOS)<<8)+row)<<16)+ncl;
1318 tpcrow->InsertCluster(c,index);
1319 }
1320 //
1321 // write indexes for fast acces
1322 //
1323 for (Int_t i=0;i<510;i++)
1324 tpcrow->fFastCluster[i]=-1;
1325 for (Int_t i=0;i<tpcrow->GetN();i++){
1326 Int_t zi = Int_t((*tpcrow)[i]->GetZ()+255.);
1327 tpcrow->fFastCluster[zi]=i; // write index
1328 }
1329 Int_t last = 0;
1330 for (Int_t i=0;i<510;i++){
1331 if (tpcrow->fFastCluster[i]<0)
1332 tpcrow->fFastCluster[i] = last;
1333 else
1334 last = tpcrow->fFastCluster[i];
1335 }
1336 }
1337 fN=fkNOS;
1338 fSectors=fOuterSec;
1339 return 0;
1340}
1341
1342
1343//_____________________________________________________________________________
1344Int_t AliTPCtrackerMI::LoadInnerSectors() {
1345 //-----------------------------------------------------------------
1346 // This function fills inner TPC sectors with clusters.
1347 //-----------------------------------------------------------------
1348 Int_t nrows = fInnerSec->GetNRows();
1349 UInt_t index=0;
1350 for (Int_t sec = 0;sec<fkNIS;sec++)
1351 for (Int_t row = 0;row<nrows;row++){
1352 AliTPCRow* tpcrow = &(fInnerSec[sec%fkNIS][row]);
1353 //
1354 //left
1355 Int_t ncl = tpcrow->fN1;
1356 while (ncl--) {
1357 AliTPCclusterMI *c= &(tpcrow->fClusters1[ncl]);
1358 index=(((sec<<8)+row)<<16)+ncl;
1359 tpcrow->InsertCluster(c,index);
1360 }
1361 //right
1362 ncl = tpcrow->fN2;
1363 while (ncl--) {
1364 AliTPCclusterMI *c= &(tpcrow->fClusters2[ncl]);
1365 index=((((sec+fkNIS)<<8)+row)<<16)+ncl;
1366 tpcrow->InsertCluster(c,index);
1367 }
1368 //
1369 // write indexes for fast acces
1370 //
1371 for (Int_t i=0;i<510;i++)
1372 tpcrow->fFastCluster[i]=-1;
1373 for (Int_t i=0;i<tpcrow->GetN();i++){
1374 Int_t zi = Int_t((*tpcrow)[i]->GetZ()+255.);
1375 tpcrow->fFastCluster[zi]=i; // write index
1376 }
1377 Int_t last = 0;
1378 for (Int_t i=0;i<510;i++){
1379 if (tpcrow->fFastCluster[i]<0)
1380 tpcrow->fFastCluster[i] = last;
1381 else
1382 last = tpcrow->fFastCluster[i];
1383 }
1c53abe2 1384
91162307 1385 }
1386
1c53abe2 1387 fN=fkNIS;
1388 fSectors=fInnerSec;
91162307 1389 return 0;
1390}
1391
1392
1393
1394//_________________________________________________________________________
1395AliTPCclusterMI *AliTPCtrackerMI::GetClusterMI(Int_t index) const {
1396 //--------------------------------------------------------------------
1397 // Return pointer to a given cluster
1398 //--------------------------------------------------------------------
1399 Int_t sec=(index&0xff000000)>>24;
1400 Int_t row=(index&0x00ff0000)>>16;
d26d9159 1401 Int_t ncl=(index&0x00007fff)>>00;
91162307 1402
1403 const AliTPCRow * tpcrow=0;
1404 AliTPCclusterMI * clrow =0;
1405 if (sec<fkNIS*2){
1406 tpcrow = &(fInnerSec[sec%fkNIS][row]);
1407 if (sec<fkNIS)
1408 clrow = tpcrow->fClusters1;
1409 else
1410 clrow = tpcrow->fClusters2;
1411 }
1412 else{
1413 tpcrow = &(fOuterSec[(sec-fkNIS*2)%fkNOS][row]);
1414 if (sec-2*fkNIS<fkNOS)
1415 clrow = tpcrow->fClusters1;
1416 else
1417 clrow = tpcrow->fClusters2;
1418 }
1419 if (tpcrow==0) return 0;
1420 if (tpcrow->GetN()<=ncl) return 0;
1421 // return (AliTPCclusterMI*)(*tpcrow)[ncl];
1422 return &(clrow[ncl]);
1423
1c53abe2 1424}
1425
91162307 1426
1427
1c53abe2 1428Int_t AliTPCtrackerMI::FollowToNext(AliTPCseed& t, Int_t nr) {
1429 //-----------------------------------------------------------------
1430 // This function tries to find a track prolongation to next pad row
1431 //-----------------------------------------------------------------
1c53abe2 1432 //
91162307 1433 Double_t x= GetXrow(nr), ymax=GetMaxY(nr);
1627d1c4 1434
91162307 1435 // if (t.GetRadius()>x+10 ) return 0;
1436 // t.PropagateTo(x+0.02);
1437 //t.PropagateTo(x+0.01);
1627d1c4 1438 if (!t.PropagateTo(x)) {
91162307 1439 t.fRemoval = 10;
1627d1c4 1440 return 0;
1441 }
91162307 1442 //
1443 Double_t y=t.GetY(), z=t.GetZ();
1444 if (TMath::Abs(y)>ymax){
1445 if (y > ymax) {
1446 t.fRelativeSector= (t.fRelativeSector+1) % fN;
1447 if (!t.Rotate(fSectors->GetAlpha()))
1448 return 0;
1449 } else if (y <-ymax) {
1450 t.fRelativeSector= (t.fRelativeSector-1+fN) % fN;
1451 if (!t.Rotate(-fSectors->GetAlpha()))
1452 return 0;
1453 }
982aff31 1454 //if (!t.PropagateTo(x)) {
1455 // return 0;
1456 //}
1457 return 1;
91162307 1458 }
1459 //
1460 // update current shape info every 3 pad-row
1461 if ( (nr%5==0) || t.GetNumberOfClusters()<2 || (t.fCurrentSigmaY2<0.0001) ){
1462 //t.fCurrentSigmaY = GetSigmaY(&t);
1463 //t.fCurrentSigmaZ = GetSigmaZ(&t);
1464 GetShape(&t,nr);
1465 }
1c53abe2 1466 //
1467 AliTPCclusterMI *cl=0;
1468 UInt_t index=0;
91162307 1469
1470
1471 //Int_t nr2 = nr;
1472 if (t.GetClusterIndex2(nr)>0){
1473 //
1474 //cl = GetClusterMI(t.GetClusterIndex2(nr));
1475 index = t.GetClusterIndex2(nr);
1476 cl = t.fClusterPointer[nr];
1477 if ( (cl==0) && (index>0)) cl = GetClusterMI(index);
1478 t.fCurrentClusterIndex1 = index;
1479 }
1480
1481 const AliTPCRow &krow=GetRow(t.fRelativeSector,nr);
1482 if ( (t.GetSigmaY2()<0) || t.GetSigmaZ2()<0) return 0;
1483 Double_t roady =1.;
1484 Double_t roadz = 1.;
1485 //
1c53abe2 1486 if (TMath::Abs(TMath::Abs(y)-ymax)<krow.fDeadZone){
1487 t.fInDead = kTRUE;
91162307 1488 t.SetClusterIndex2(nr,-1);
1c53abe2 1489 return 0;
1490 }
1491 else
1492 {
1627d1c4 1493 if (TMath::Abs(z)<(1.05*x+10)) t.fNFoundable++;
1494 else
1495 return 0;
1c53abe2 1496 }
1497 //calculate
91162307 1498 if (cl){
c9427e08 1499 t.fCurrentCluster = cl;
91162307 1500 t.fRow = nr;
1501 Int_t accept = AcceptCluster(&t,t.fCurrentCluster,1.);
d26d9159 1502 if (fIteration>0) accept =0;
91162307 1503 if (accept<3) {
1504 //if founded cluster is acceptible
1505 UpdateTrack(&t,accept);
1506 return 1;
1507 }
1508 }
c9427e08 1509
91162307 1510 if (krow) {
1511 // cl = krow.FindNearest2(y+10.,z,roady,roadz,index);
1512 cl = krow.FindNearest2(y,z,roady,roadz,index);
1513 if (cl) t.fCurrentClusterIndex1 = krow.GetIndex(index);
1514 }
1515 // t.fNoCluster++;
c9427e08 1516
91162307 1517 if (cl) {
1518 t.fCurrentCluster = cl;
1519 t.fRow = nr;
1520 Int_t accept = AcceptCluster(&t,t.fCurrentCluster,1.);
d26d9159 1521 /*
91162307 1522 if (t.fCurrentCluster->IsUsed(10)){
1523 //
1524 //
c9427e08 1525
91162307 1526 t.fNShared++;
1527 if (t.fNShared>0.7*t.GetNumberOfClusters()) {
1528 t.fRemoval =10;
1529 return 0;
1530 }
1531 }
d26d9159 1532 */
91162307 1533 if (accept<3) UpdateTrack(&t,accept);
c9427e08 1534
91162307 1535 } else {
982aff31 1536 if ( fIteration==0 && t.fNFoundable*0.5 > t.GetNumberOfClusters()) t.fRemoval=10;
91162307 1537
1538 }
1539 return 1;
1540}
c9427e08 1541
91162307 1542Int_t AliTPCtrackerMI::FollowToNextFast(AliTPCseed& t, Int_t nr) {
1543 //-----------------------------------------------------------------
1544 // This function tries to find a track prolongation to next pad row
1545 //-----------------------------------------------------------------
1546 //
1547 Double_t x= GetXrow(nr), ymax=GetMaxY(nr);
1548 Double_t y,z;
1549 if (!t.GetProlongation(x,y,z)) {
1550 t.fRemoval = 10;
1551 return 0;
1552 }
1553 //
1554 //
1555 if (TMath::Abs(y)>ymax){
91162307 1556
1c53abe2 1557 if (y > ymax) {
1558 t.fRelativeSector= (t.fRelativeSector+1) % fN;
1559 if (!t.Rotate(fSectors->GetAlpha()))
1560 return 0;
1561 } else if (y <-ymax) {
1562 t.fRelativeSector= (t.fRelativeSector-1+fN) % fN;
1563 if (!t.Rotate(-fSectors->GetAlpha()))
1564 return 0;
91162307 1565 }
1566 if (!t.PropagateTo(x)) {
1567 return 0;
1568 }
1569 t.GetProlongation(x,y,z);
1570 }
1571 //
1572 // update current shape info every 3 pad-row
1573 if ( (nr%6==0) || t.GetNumberOfClusters()<2 || (t.fCurrentSigmaY2<0.0001) ){
1574 // t.fCurrentSigmaY = GetSigmaY(&t);
1575 //t.fCurrentSigmaZ = GetSigmaZ(&t);
1576 GetShape(&t,nr);
1577 }
1578 //
1579 AliTPCclusterMI *cl=0;
1580 UInt_t index=0;
1581
1582
1583 //Int_t nr2 = nr;
1584 const AliTPCRow &krow=GetRow(t.fRelativeSector,nr);
1585 if ( (t.GetSigmaY2()<0) || t.GetSigmaZ2()<0) return 0;
1586 Double_t roady =1.;
1587 Double_t roadz = 1.;
1588 //
1589 Int_t row = nr;
1590 if (TMath::Abs(TMath::Abs(y)-ymax)<krow.fDeadZone){
1591 t.fInDead = kTRUE;
1592 t.SetClusterIndex2(row,-1);
1593 return 0;
1594 }
1595 else
1596 {
1597 if (TMath::Abs(z)>(1.05*x+10)) t.SetClusterIndex2(row,-1);
1c53abe2 1598 }
91162307 1599 //calculate
1600
1601 if ((cl==0)&&(krow)) {
1602 // cl = krow.FindNearest2(y+10,z,roady,roadz,index);
1603 cl = krow.FindNearest2(y,z,roady,roadz,index);
1604
1605 if (cl) t.fCurrentClusterIndex1 = krow.GetIndex(index);
1606 }
1607
1608 if (cl) {
1609 t.fCurrentCluster = cl;
1610 // Int_t accept = AcceptCluster(&t,t.fCurrentCluster,1.);
1611 //if (accept<3){
1612 t.SetClusterIndex2(row,index);
1613 t.fClusterPointer[row] = cl;
1614 //}
1c53abe2 1615 }
1616 return 1;
1617}
1618
1619
91162307 1620
1621Int_t AliTPCtrackerMI::UpdateClusters(AliTPCseed& t, Int_t nr) {
1c53abe2 1622 //-----------------------------------------------------------------
1623 // This function tries to find a track prolongation to next pad row
1624 //-----------------------------------------------------------------
1625 t.fCurrentCluster = 0;
1626 t.fCurrentClusterIndex1 = 0;
1c53abe2 1627
1628 Double_t xt=t.GetX();
91162307 1629 Int_t row = GetRowNumber(xt)-1;
1630 Double_t ymax= GetMaxY(nr);
1631
1c53abe2 1632 if (row < nr) return 1; // don't prolongate if not information until now -
91162307 1633 if (TMath::Abs(t.GetSnp())>0.9 && t.GetNumberOfClusters()>40. && fIteration!=2) {
1634 t.fRemoval =10;
1635 return 0; // not prolongate strongly inclined tracks
1636 }
1637 if (TMath::Abs(t.GetSnp())>0.95) {
1638 t.fRemoval =10;
1639 return 0; // not prolongate strongly inclined tracks
1640 }
1641
1642 Double_t x= GetXrow(nr);
1643 Double_t y,z;
1644 //t.PropagateTo(x+0.02);
1645 //t.PropagateTo(x+0.01);
1627d1c4 1646 if (!t.PropagateTo(x)){
1627d1c4 1647 return 0;
1648 }
1c53abe2 1649 //
91162307 1650 y=t.GetY();
1651 z=t.GetZ();
1c53abe2 1652
91162307 1653 if (TMath::Abs(y)>ymax){
1654 if (y > ymax) {
1655 t.fRelativeSector= (t.fRelativeSector+1) % fN;
1656 if (!t.Rotate(fSectors->GetAlpha()))
1657 return 0;
1658 } else if (y <-ymax) {
1659 t.fRelativeSector= (t.fRelativeSector-1+fN) % fN;
1660 if (!t.Rotate(-fSectors->GetAlpha()))
1661 return 0;
1662 }
982aff31 1663 // if (!t.PropagateTo(x)){
1664 // return 0;
1665 //}
1666 return 1;
1667 //y = t.GetY();
1c53abe2 1668 }
91162307 1669 //
1c53abe2 1670
91162307 1671 AliTPCRow &krow=GetRow(t.fRelativeSector,nr);
1c53abe2 1672
1673 if (TMath::Abs(TMath::Abs(y)-ymax)<krow.fDeadZone){
1674 t.fInDead = kTRUE;
91162307 1675 t.SetClusterIndex2(nr,-1);
1c53abe2 1676 return 0;
1677 }
1678 else
1679 {
1627d1c4 1680 if (TMath::Abs(t.GetZ())<(1.05*t.GetX()+10)) t.fNFoundable++;
1681 else
1682 return 0;
1c53abe2 1683 }
1c53abe2 1684
91162307 1685 // update current
1686 if ( (nr%6==0) || t.GetNumberOfClusters()<2){
1687 // t.fCurrentSigmaY = GetSigmaY(&t);
1688 //t.fCurrentSigmaZ = GetSigmaZ(&t);
1689 GetShape(&t,nr);
1690 }
1c53abe2 1691
91162307 1692 AliTPCclusterMI *cl=0;
1693 UInt_t index=0;
1694 //
1695 Double_t roady = 1.;
1696 Double_t roadz = 1.;
1697 //
d26d9159 1698
1699 if (!cl){
1700 index = t.GetClusterIndex2(nr);
1701 if ( (index>0) && (index&0x8000)==0){
1702 cl = t.fClusterPointer[nr];
1703 if ( (cl==0) && (index>0)) cl = GetClusterMI(index);
1704 t.fCurrentClusterIndex1 = index;
1705 if (cl) {
1706 t.fCurrentCluster = cl;
1707 return 1;
1708 }
1709 }
1710 }
1711
91162307 1712 if (krow) {
1713 //cl = krow.FindNearest2(y+10,z,roady,roadz,index);
1714 cl = krow.FindNearest2(y,z,roady,roadz,index);
1715 }
d26d9159 1716
91162307 1717 if (cl) t.fCurrentClusterIndex1 = krow.GetIndex(index);
d26d9159 1718 t.fCurrentCluster = cl;
1719
91162307 1720 return 1;
1721}
1c53abe2 1722
1c53abe2 1723
91162307 1724Int_t AliTPCtrackerMI::FollowToNextCluster(AliTPCseed & t, Int_t nr) {
1725 //-----------------------------------------------------------------
1726 // This function tries to find a track prolongation to next pad row
1727 //-----------------------------------------------------------------
1c53abe2 1728
91162307 1729 //update error according neighborhoud
1c53abe2 1730
91162307 1731 if (t.fCurrentCluster) {
1732 t.fRow = nr;
8c51a605 1733 Int_t accept = AcceptCluster(&t,t.fCurrentCluster,1.);
91162307 1734
1735 if (t.fCurrentCluster->IsUsed(10)){
1736 //
1737 //
1738 // t.fErrorZ2*=2;
1739 // t.fErrorY2*=2;
1740 t.fNShared++;
1741 if (t.fNShared>0.7*t.GetNumberOfClusters()) {
1742 t.fRemoval =10;
1743 return 0;
1744 }
b364ca79 1745 }
d26d9159 1746 if (fIteration>0) accept = 0;
b364ca79 1747 if (accept<3) UpdateTrack(&t,accept);
1748
1c53abe2 1749 } else {
91162307 1750 if (fIteration==0){
1751 if ( ( (t.GetSigmaY2()+t.GetSigmaZ2())>0.16)&& t.GetNumberOfClusters()>18) t.fRemoval=10;
1752 if ( t.GetChi2()/t.GetNumberOfClusters()>6 &&t.GetNumberOfClusters()>18) t.fRemoval=10;
1753
1754 if (( (t.fNFoundable*0.5 > t.GetNumberOfClusters()) || t.fNoCluster>15)) t.fRemoval=10;
1c53abe2 1755 }
1756 }
1757 return 1;
1758}
1759
1760
1761
91162307 1762//_____________________________________________________________________________
1763Int_t AliTPCtrackerMI::FollowProlongation(AliTPCseed& t, Int_t rf, Int_t step) {
1c53abe2 1764 //-----------------------------------------------------------------
91162307 1765 // This function tries to find a track prolongation.
1c53abe2 1766 //-----------------------------------------------------------------
1767 Double_t xt=t.GetX();
1768 //
91162307 1769 Double_t alpha=t.GetAlpha() - fSectors->GetAlphaShift();
1c53abe2 1770 if (alpha > 2.*TMath::Pi()) alpha -= 2.*TMath::Pi();
1771 if (alpha < 0. ) alpha += 2.*TMath::Pi();
91162307 1772 //
1773 t.fRelativeSector = Int_t(alpha/fSectors->GetAlpha()+0.0001)%fN;
1c53abe2 1774
91162307 1775 Int_t first = GetRowNumber(xt)-1;
1776 for (Int_t nr= first; nr>=rf; nr-=step) {
982aff31 1777 if (nr<fInnerSec->GetNRows())
1778 fSectors = fInnerSec;
1779 else
1780 fSectors = fOuterSec;
91162307 1781 if (FollowToNext(t,nr)==0)
1782 if (!t.IsActive()) return 0;
1783
1784 }
1785 return 1;
1786}
1787
1c53abe2 1788
1789//_____________________________________________________________________________
91162307 1790Int_t AliTPCtrackerMI::FollowProlongationFast(AliTPCseed& t, Int_t rf, Int_t step) {
1c53abe2 1791 //-----------------------------------------------------------------
1792 // This function tries to find a track prolongation.
1793 //-----------------------------------------------------------------
1794 Double_t xt=t.GetX();
1795 //
1796 Double_t alpha=t.GetAlpha() - fSectors->GetAlphaShift();
1797 if (alpha > 2.*TMath::Pi()) alpha -= 2.*TMath::Pi();
1798 if (alpha < 0. ) alpha += 2.*TMath::Pi();
91162307 1799 t.fRelativeSector = Int_t(alpha/fSectors->GetAlpha()+0.0001)%fN;
1800
1801 for (Int_t nr=GetRowNumber(xt)-1; nr>=rf; nr-=step) {
1802
1803 if (FollowToNextFast(t,nr)==0)
1804 if (!t.IsActive()) return 0;
1c53abe2 1805
1c53abe2 1806 }
1807 return 1;
1808}
1809
1810
91162307 1811
1812
1813
1c53abe2 1814Int_t AliTPCtrackerMI::FollowBackProlongation(AliTPCseed& t, Int_t rf) {
1815 //-----------------------------------------------------------------
1816 // This function tries to find a track prolongation.
1817 //-----------------------------------------------------------------
91162307 1818 // Double_t xt=t.GetX();
1c53abe2 1819 //
1820 Double_t alpha=t.GetAlpha() - fSectors->GetAlphaShift();
1821 if (alpha > 2.*TMath::Pi()) alpha -= 2.*TMath::Pi();
1822 if (alpha < 0. ) alpha += 2.*TMath::Pi();
91162307 1823 t.fRelativeSector = Int_t(alpha/fSectors->GetAlpha()+0.0001)%fN;
1c53abe2 1824
91162307 1825 Int_t first = 0;
1826 first = t.fFirstPoint+3;
1827 //
1828 if (first<0) first=0;
1829 for (Int_t nr=first+1; nr<=rf; nr++) {
1830 //if ( (t.GetSnp()<0.9))
d26d9159 1831 if (nr<fInnerSec->GetNRows())
1832 fSectors = fInnerSec;
1833 else
1834 fSectors = fOuterSec;
1835 FollowToNext(t,nr);
1c53abe2 1836 }
1837 return 1;
1838}
1839
1840
1841
1842
1843
1844Float_t AliTPCtrackerMI::OverlapFactor(AliTPCseed * s1, AliTPCseed * s2, Int_t &sum1, Int_t & sum2)
1845{
1846 //
1847 //
1848 sum1=0;
1849 sum2=0;
1850 Int_t sum=0;
1c53abe2 1851 //
1852 Float_t dz2 =(s1->GetZ() - s2->GetZ());
c9427e08 1853 dz2*=dz2;
91162307 1854
c9427e08 1855 Float_t dy2 =TMath::Abs((s1->GetY() - s2->GetY()));
1c53abe2 1856 dy2*=dy2;
1857 Float_t distance = TMath::Sqrt(dz2+dy2);
c9427e08 1858 if (distance>4.) return 0; // if there are far away - not overlap - to reduce combinatorics
1c53abe2 1859
91162307 1860 // Int_t offset =0;
c9427e08 1861 Int_t firstpoint = TMath::Min(s1->fFirstPoint,s2->fFirstPoint);
1862 Int_t lastpoint = TMath::Max(s1->fLastPoint,s2->fLastPoint);
c9427e08 1863 if (lastpoint>160)
1864 lastpoint =160;
1865 if (firstpoint<0)
1866 firstpoint = 0;
91162307 1867 if (firstpoint>lastpoint) {
1868 firstpoint =lastpoint;
1869 // lastpoint =160;
c9427e08 1870 }
1871
1872
91162307 1873 for (Int_t i=firstpoint-1;i<lastpoint+1;i++){
1874 if (s1->GetClusterIndex2(i)>0) sum1++;
1875 if (s2->GetClusterIndex2(i)>0) sum2++;
1876 if (s1->GetClusterIndex2(i)==s2->GetClusterIndex2(i) && s1->GetClusterIndex2(i)>0) {
1c53abe2 1877 sum++;
1878 }
1879 }
91162307 1880 if (sum<5) return 0;
1881
1627d1c4 1882 Float_t summin = TMath::Min(sum1+1,sum2+1);
1883 Float_t ratio = (sum+1)/Float_t(summin);
1c53abe2 1884 return ratio;
1885}
1886
1887void AliTPCtrackerMI::SignShared(AliTPCseed * s1, AliTPCseed * s2)
1888{
1889 //
1890 //
91162307 1891 if (TMath::Abs(s1->GetC()-s2->GetC())>0.004) return;
1892 if (TMath::Abs(s1->GetTgl()-s2->GetTgl())>0.6) return;
1893
1c53abe2 1894 Float_t dz2 =(s1->GetZ() - s2->GetZ());
1895 dz2*=dz2;
1896 Float_t dy2 =(s1->GetY() - s2->GetY());
1897 dy2*=dy2;
91162307 1898 Float_t distance = dz2+dy2;
1899 if (distance>325.) return ; // if there are far away - not overlap - to reduce combinatorics
1900
1c53abe2 1901 //
91162307 1902 Int_t sumshared=0;
1903 //
1904 Int_t firstpoint = TMath::Max(s1->fFirstPoint,s2->fFirstPoint);
1905 Int_t lastpoint = TMath::Min(s1->fLastPoint,s2->fLastPoint);
1906 //
1907 if (firstpoint>=lastpoint-5) return;;
1c53abe2 1908
91162307 1909 for (Int_t i=firstpoint;i<lastpoint;i++){
1910 // if ( (s1->GetClusterIndex2(i)&0xFFFF8FFF)==(s2->GetClusterIndex2(i)&0xFFFF8FFF) && s1->GetClusterIndex2(i)>0) {
1911 if ( (s1->GetClusterIndex2(i))==(s2->GetClusterIndex2(i)) && s1->GetClusterIndex2(i)>0) {
1912 sumshared++;
1913 }
1914 }
1915 if (sumshared>4){
1916 // sign clusters
1917 //
1918 for (Int_t i=firstpoint;i<lastpoint;i++){
1919 // if ( (s1->GetClusterIndex2(i)&0xFFFF8FFF)==(s2->GetClusterIndex2(i)&0xFFFF8FFF) && s1->GetClusterIndex2(i)>0) {
1920 if ( (s1->GetClusterIndex2(i))==(s2->GetClusterIndex2(i)) && s1->GetClusterIndex2(i)>0) {
1921 AliTPCTrackerPoint *p1 = s1->GetTrackPoint(i);
1922 AliTPCTrackerPoint *p2 = s2->GetTrackPoint(i);;
1923 if (s1->IsActive()&&s2->IsActive()){
1924 p1->fIsShared = kTRUE;
1925 p2->fIsShared = kTRUE;
1926 }
1927 }
1928 }
1929 }
1930 //
1931 if (sumshared>10){
1932 for (Int_t i=0;i<4;i++){
1933 if (s1->fOverlapLabels[3*i]==0){
1934 s1->fOverlapLabels[3*i] = s2->GetLabel();
1935 s1->fOverlapLabels[3*i+1] = sumshared;
1936 s1->fOverlapLabels[3*i+2] = s2->GetUniqueID();
1937 break;
1938 }
1939 }
1940 for (Int_t i=0;i<4;i++){
1941 if (s2->fOverlapLabels[3*i]==0){
1942 s2->fOverlapLabels[3*i] = s1->GetLabel();
1943 s2->fOverlapLabels[3*i+1] = sumshared;
1944 s2->fOverlapLabels[3*i+2] = s1->GetUniqueID();
1945 break;
1946 }
1947 }
1948 }
1c53abe2 1949
91162307 1950}
1c53abe2 1951
91162307 1952void AliTPCtrackerMI::SignShared(TObjArray * arr)
1953{
1c53abe2 1954 //
91162307 1955 //sort trackss according sectors
1956 //
c9427e08 1957 for (Int_t i=0; i<arr->GetEntriesFast(); i++) {
1958 AliTPCseed *pt=(AliTPCseed*)arr->UncheckedAt(i);
91162307 1959 if (!pt) continue;
1960 //if (pt) RotateToLocal(pt);
1961 pt->fSort = 0;
c9427e08 1962 }
91162307 1963 arr->UnSort();
1c53abe2 1964 arr->Sort(); // sorting according z
1965 arr->Expand(arr->GetEntries());
91162307 1966 //
1967 //
1c53abe2 1968 Int_t nseed=arr->GetEntriesFast();
1c53abe2 1969 for (Int_t i=0; i<nseed; i++) {
1970 AliTPCseed *pt=(AliTPCseed*)arr->UncheckedAt(i);
91162307 1971 if (!pt) continue;
1972 for (Int_t j=0;j<=12;j++){
1973 pt->fOverlapLabels[j] =0;
1c53abe2 1974 }
91162307 1975 }
1976 for (Int_t i=0; i<nseed; i++) {
1977 AliTPCseed *pt=(AliTPCseed*)arr->UncheckedAt(i);
1978 if (!pt) continue;
1979 if (pt->fRemoval>10) continue;
1c53abe2 1980 for (Int_t j=i+1; j<nseed; j++){
1981 AliTPCseed *pt2=(AliTPCseed*)arr->UncheckedAt(j);
91162307 1982 // if (pt2){
1983 if (pt2->fRemoval<=10) {
1984 if ( TMath::Abs(pt->fRelativeSector-pt2->fRelativeSector)>0) break;
1985 SignShared(pt,pt2);
c9427e08 1986 }
91162307 1987 }
1988 }
1989}
1990
1991void AliTPCtrackerMI::RemoveDouble(TObjArray * arr, Float_t factor1, Float_t factor2, Int_t removalindex)
1992{
1993 //
1994 //sort trackss according sectors
1995 //
1996 if (fDebug&1) {
1997 printf("Number of tracks before double removal- %d\n",arr->GetEntries());
1998 }
1999 //
2000 for (Int_t i=0; i<arr->GetEntriesFast(); i++) {
2001 AliTPCseed *pt=(AliTPCseed*)arr->UncheckedAt(i);
2002 if (!pt) continue;
2003 pt->fSort = 0;
2004 }
2005 arr->UnSort();
2006 arr->Sort(); // sorting according z
2007 arr->Expand(arr->GetEntries());
2008 //
2009 //reset overlap labels
2010 //
2011 Int_t nseed=arr->GetEntriesFast();
2012 for (Int_t i=0; i<nseed; i++) {
2013 AliTPCseed *pt=(AliTPCseed*)arr->UncheckedAt(i);
2014 if (!pt) continue;
2015 pt->SetUniqueID(i);
2016 for (Int_t j=0;j<=12;j++){
2017 pt->fOverlapLabels[j] =0;
1c53abe2 2018 }
2019 }
91162307 2020 //
2021 //sign shared tracks
1c53abe2 2022 for (Int_t i=0; i<nseed; i++) {
2023 AliTPCseed *pt=(AliTPCseed*)arr->UncheckedAt(i);
91162307 2024 if (!pt) continue;
2025 if (pt->fRemoval>10) continue;
2026 Float_t deltac = pt->GetC()*0.1;
2027 for (Int_t j=i+1; j<nseed; j++){
2028 AliTPCseed *pt2=(AliTPCseed*)arr->UncheckedAt(j);
2029 // if (pt2){
2030 if (pt2->fRemoval<=10) {
2031 if ( TMath::Abs(pt->fRelativeSector-pt2->fRelativeSector)>0) break;
2032 if (TMath::Abs(pt->GetC() -pt2->GetC())>deltac) continue;
2033 if (TMath::Abs(pt->GetTgl()-pt2->GetTgl())>0.05) continue;
2034 //
2035 SignShared(pt,pt2);
2036 }
1c53abe2 2037 }
1c53abe2 2038 }
91162307 2039 //
2040 // remove highly shared tracks
2041 for (Int_t i=0; i<nseed; i++) {
2042 AliTPCseed *pt=(AliTPCseed*)arr->UncheckedAt(i);
2043 if (!pt) continue;
2044 if (pt->fRemoval>10) continue;
2045 //
2046 Int_t sumshared =0;
2047 for (Int_t j=0;j<4;j++){
2048 sumshared = pt->fOverlapLabels[j*3+1];
2049 }
2050 Float_t factor = factor1;
2051 if (pt->fRemoval>0) factor = factor2;
2052 if (sumshared/pt->GetNumberOfClusters()>factor){
2053 for (Int_t j=0;j<4;j++){
2054 if (pt->fOverlapLabels[3*j]==0) continue;
2055 if (pt->fOverlapLabels[3*j+1]<5) continue;
2056 if (pt->fRemoval==removalindex) continue;
2057 AliTPCseed * pt2 = (AliTPCseed*)arr->UncheckedAt(pt->fOverlapLabels[3*j+2]);
2058 if (!pt2) continue;
2059 if (pt2->GetSigma2C()<pt->GetSigma2C()){
2060 // pt->fRemoval = removalindex;
2061 delete arr->RemoveAt(i);
2062 break;
1c53abe2 2063 }
91162307 2064 }
1c53abe2 2065 }
91162307 2066 }
2067 arr->Compress();
2068 if (fDebug&1) {
2069 printf("Number of tracks after double removal- %d\n",arr->GetEntries());
2070 }
2071}
2072
2073
2074
1c53abe2 2075
2076
91162307 2077
47966a6d 2078void AliTPCtrackerMI::SortTracks(TObjArray * arr, Int_t mode) const
91162307 2079{
2080 //
2081 //sort tracks in array according mode criteria
2082 Int_t nseed = arr->GetEntriesFast();
2083 for (Int_t i=0; i<nseed; i++) {
2084 AliTPCseed *pt=(AliTPCseed*)arr->UncheckedAt(i);
2085 if (!pt) {
2086 continue;
2087 }
2088 pt->fSort = mode;
2089 }
2090 arr->UnSort();
2091 arr->Sort();
1c53abe2 2092}
c9427e08 2093
91162307 2094void AliTPCtrackerMI::RemoveUsed(TObjArray * arr, Float_t factor1, Float_t factor2, Int_t removalindex)
c9427e08 2095{
2096
2097 //Loop over all tracks and remove "overlaps"
2098 //
2099 //
2100 Int_t nseed = arr->GetEntriesFast();
2101 Int_t good =0;
91162307 2102
c9427e08 2103 for (Int_t i=0; i<nseed; i++) {
2104 AliTPCseed *pt=(AliTPCseed*)arr->UncheckedAt(i);
2105 if (!pt) {
91162307 2106 delete arr->RemoveAt(i);
c9427e08 2107 }
91162307 2108 else{
2109 pt->fSort =1;
2110 pt->fBSigned = kFALSE;
c9427e08 2111 }
91162307 2112 }
2113 arr->Compress();
2114 nseed = arr->GetEntriesFast();
2115 arr->UnSort();
2116 arr->Sort();
2117 //
2118 //unsign used
2119 UnsignClusters();
2120 //
2121 for (Int_t i=0; i<nseed; i++) {
2122 AliTPCseed *pt=(AliTPCseed*)arr->UncheckedAt(i);
2123 if (!pt) {
2124 continue;
2125 }
2126 Int_t found,foundable,shared;
2127 if (pt->IsActive())
2128 pt->GetClusterStatistic(0,160,found, foundable,shared,kFALSE);
2129 else
2130 pt->GetClusterStatistic(0,160,found, foundable,shared,kTRUE);
2131 //
2132 Double_t factor = factor2;
2133 if (pt->fBConstrain) factor = factor1;
2134
2135 if ((Float_t(shared)/Float_t(found))>factor){
c9427e08 2136 pt->Desactivate(removalindex);
91162307 2137 continue;
2138 }
2139
2140 good++;
2141 for (Int_t i=0; i<160; i++) {
2142 Int_t index=pt->GetClusterIndex2(i);
2143 if (index<0 || index&0x8000 ) continue;
2144 AliTPCclusterMI *c= pt->fClusterPointer[i];
2145 if (!c) continue;
2146 // if (!c->IsUsed(10)) c->Use(10);
2147 //if (pt->IsActive())
2148 c->Use(10);
2149 //else
2150 // c->Use(5);
c9427e08 2151 }
91162307 2152
c9427e08 2153 }
2154 fNtracks = good;
c9427e08 2155
91162307 2156 printf("\n*****\nNumber of good tracks after shared removal\t%d\n",fNtracks);
c9427e08 2157}
2158
91162307 2159void AliTPCtrackerMI::UnsignClusters()
1c53abe2 2160{
91162307 2161 //
2162 // loop over all clusters and unsign them
2163 //
2164
2165 for (Int_t sec=0;sec<fkNIS;sec++){
2166 for (Int_t row=0;row<fInnerSec->GetNRows();row++){
2167 AliTPCclusterMI *cl = fInnerSec[sec][row].fClusters1;
2168 for (Int_t icl =0;icl< fInnerSec[sec][row].fN1;icl++)
2169 // if (cl[icl].IsUsed(10))
2170 cl[icl].Use(-1);
2171 cl = fInnerSec[sec][row].fClusters2;
2172 for (Int_t icl =0;icl< fInnerSec[sec][row].fN2;icl++)
2173 //if (cl[icl].IsUsed(10))
2174 cl[icl].Use(-1);
2175 }
2176 }
2177
2178 for (Int_t sec=0;sec<fkNOS;sec++){
2179 for (Int_t row=0;row<fOuterSec->GetNRows();row++){
2180 AliTPCclusterMI *cl = fOuterSec[sec][row].fClusters1;
2181 for (Int_t icl =0;icl< fOuterSec[sec][row].fN1;icl++)
2182 //if (cl[icl].IsUsed(10))
2183 cl[icl].Use(-1);
2184 cl = fOuterSec[sec][row].fClusters2;
2185 for (Int_t icl =0;icl< fOuterSec[sec][row].fN2;icl++)
2186 //if (cl[icl].IsUsed(10))
2187 cl[icl].Use(-1);
2188 }
2189 }
2190
1c53abe2 2191}
2192
91162307 2193
2194
732b9e78 2195void AliTPCtrackerMI::SignClusters(TObjArray * arr, Float_t fnumber, Float_t fdensity)
1c53abe2 2196{
2197 //
91162307 2198 //sign clusters to be "used"
2199 //
2200 // snumber and sdensity sign number of sigmas - bellow mean value to be accepted
2201 // loop over "primaries"
2202
2203 Float_t sumdens=0;
2204 Float_t sumdens2=0;
2205 Float_t sumn =0;
2206 Float_t sumn2 =0;
2207 Float_t sumchi =0;
2208 Float_t sumchi2 =0;
2209
2210 Float_t sum =0;
2211
1c53abe2 2212 TStopwatch timer;
91162307 2213 timer.Start();
1c53abe2 2214
91162307 2215 Int_t nseed = arr->GetEntriesFast();
2216 for (Int_t i=0; i<nseed; i++) {
2217 AliTPCseed *pt=(AliTPCseed*)arr->UncheckedAt(i);
2218 if (!pt) {
2219 continue;
2220 }
2221 if (!(pt->IsActive())) continue;
2222 Float_t dens = pt->GetNumberOfClusters()/Float_t(pt->fNFoundable);
2223 if ( (dens>0.7) && (pt->GetNumberOfClusters()>70)){
2224 sumdens += dens;
2225 sumdens2+= dens*dens;
2226 sumn += pt->GetNumberOfClusters();
2227 sumn2 += pt->GetNumberOfClusters()*pt->GetNumberOfClusters();
2228 Float_t chi2 = pt->GetChi2()/pt->GetNumberOfClusters();
2229 if (chi2>5) chi2=5;
2230 sumchi +=chi2;
2231 sumchi2 +=chi2*chi2;
2232 sum++;
2233 }
1627d1c4 2234 }
91162307 2235
2236 Float_t mdensity = 0.9;
2237 Float_t meann = 130;
2238 Float_t meanchi = 1;
2239 Float_t sdensity = 0.1;
2240 Float_t smeann = 10;
2241 Float_t smeanchi =0.4;
1627d1c4 2242
91162307 2243
2244 if (sum>20){
2245 mdensity = sumdens/sum;
2246 meann = sumn/sum;
2247 meanchi = sumchi/sum;
2248 //
2249 sdensity = sumdens2/sum-mdensity*mdensity;
2250 sdensity = TMath::Sqrt(sdensity);
2251 //
2252 smeann = sumn2/sum-meann*meann;
2253 smeann = TMath::Sqrt(smeann);
2254 //
2255 smeanchi = sumchi2/sum - meanchi*meanchi;
2256 smeanchi = TMath::Sqrt(smeanchi);
2257 }
2258
2259
2260 //REMOVE SHORT DELTAS or tracks going out of sensitive volume of TPC
2261 //
2262 for (Int_t i=0; i<nseed; i++) {
2263 AliTPCseed *pt=(AliTPCseed*)arr->UncheckedAt(i);
2264 if (!pt) {
2265 continue;
1c53abe2 2266 }
91162307 2267 if (pt->fBSigned) continue;
2268 if (pt->fBConstrain) continue;
2269 //if (!(pt->IsActive())) continue;
2270 /*
2271 Int_t found,foundable,shared;
2272 pt->GetClusterStatistic(0,160,found, foundable,shared);
2273 if (shared/float(found)>0.3) {
2274 if (shared/float(found)>0.9 ){
2275 //delete arr->RemoveAt(i);
2276 }
2277 continue;
c9427e08 2278 }
91162307 2279 */
2280 Bool_t isok =kFALSE;
2281 if ( (pt->fNShared/pt->GetNumberOfClusters()<0.5) &&pt->GetNumberOfClusters()>60)
2282 isok = kTRUE;
2283 if ((TMath::Abs(1/pt->GetC())<100.) && (pt->fNShared/pt->GetNumberOfClusters()<0.7))
2284 isok =kTRUE;
2285 if (TMath::Abs(pt->GetZ()/pt->GetX())>1.1)
2286 isok =kTRUE;
2287 if ( (TMath::Abs(pt->GetSnp()>0.7) && pt->GetD(0,0)>60.))
2288 isok =kTRUE;
2289
2290 if (isok)
2291 for (Int_t i=0; i<160; i++) {
2292 Int_t index=pt->GetClusterIndex2(i);
2293 if (index<0) continue;
2294 AliTPCclusterMI *c= pt->fClusterPointer[i];
2295 if (!c) continue;
2296 //if (!(c->IsUsed(10))) c->Use();
2297 c->Use(10);
2298 }
2299 }
2300
c9427e08 2301
1c53abe2 2302 //
91162307 2303 Double_t maxchi = meanchi+2.*smeanchi;
2304
2305 for (Int_t i=0; i<nseed; i++) {
2306 AliTPCseed *pt=(AliTPCseed*)arr->UncheckedAt(i);
2307 if (!pt) {
1c53abe2 2308 continue;
91162307 2309 }
2310 //if (!(pt->IsActive())) continue;
2311 if (pt->fBSigned) continue;
2312 Double_t chi = pt->GetChi2()/pt->GetNumberOfClusters();
2313 if (chi>maxchi) continue;
2314
2315 Float_t bfactor=1;
2316 Float_t dens = pt->GetNumberOfClusters()/Float_t(pt->fNFoundable);
2317
2318 //sign only tracks with enoug big density at the beginning
2319
2320 if ((pt->GetDensityFirst(40)<0.75) && pt->GetNumberOfClusters()<meann) continue;
2321
2322
3e5d0aa2 2323 Double_t mindens = TMath::Max(double(mdensity-sdensity*fdensity*bfactor),0.65);
91162307 2324 Double_t minn = TMath::Max(Int_t(meann-fnumber*smeann*bfactor),50);
2325
2326 // if (pt->fBConstrain) mindens = TMath::Max(mdensity-sdensity*fdensity*bfactor,0.65);
2327 if ( (pt->fRemoval==10) && (pt->GetSnp()>0.8)&&(dens>mindens))
2328 minn=0;
2329
2330 if ((dens>mindens && pt->GetNumberOfClusters()>minn) && chi<maxchi ){
2331 //Int_t noc=pt->GetNumberOfClusters();
2332 pt->fBSigned = kTRUE;
2333 for (Int_t i=0; i<160; i++) {
2334
2335 Int_t index=pt->GetClusterIndex2(i);
2336 if (index<0) continue;
2337 AliTPCclusterMI *c= pt->fClusterPointer[i];
2338 if (!c) continue;
2339 // if (!(c->IsUsed(10))) c->Use();
2340 c->Use(10);
2341 }
1c53abe2 2342 }
91162307 2343 }
2344 // gLastCheck = nseed;
2345 // arr->Compress();
2346 if (fDebug>0){
2347 timer.Print();
2348 }
1c53abe2 2349}
2350
2351
47966a6d 2352void AliTPCtrackerMI::StopNotActive(TObjArray * arr, Int_t row0, Float_t th0, Float_t th1, Float_t th2) const
91162307 2353{
2354 // stop not active tracks
2355 // take th1 as threshold for number of founded to number of foundable on last 10 active rows
2356 // take th2 as threshold for number of founded to number of foundable on last 20 active rows
2357 Int_t nseed = arr->GetEntriesFast();
2358 //
2359 for (Int_t i=0; i<nseed; i++) {
2360 AliTPCseed *pt=(AliTPCseed*)arr->UncheckedAt(i);
2361 if (!pt) {
2362 continue;
2363 }
2364 if (!(pt->IsActive())) continue;
2365 StopNotActive(pt,row0,th0, th1,th2);
2366 }
2367}
1c53abe2 2368
1c53abe2 2369
1c53abe2 2370
91162307 2371void AliTPCtrackerMI::StopNotActive(AliTPCseed * seed, Int_t row0, Float_t th0, Float_t th1,
47966a6d 2372 Float_t th2) const
91162307 2373{
2374 // stop not active tracks
2375 // take th1 as threshold for number of founded to number of foundable on last 10 active rows
2376 // take th2 as threshold for number of founded to number of foundable on last 20 active rows
2377 Int_t sumgood1 = 0;
2378 Int_t sumgood2 = 0;
2379 Int_t foundable = 0;
2380 Int_t maxindex = seed->fLastPoint; //last foundable row
2381 if (seed->fNFoundable*th0 > seed->GetNumberOfClusters()) {
2382 seed->Desactivate(10) ;
2383 return;
2384 }
1c53abe2 2385
3e5d0aa2 2386 for (Int_t i=row0; i<maxindex; i++){
91162307 2387 Int_t index = seed->GetClusterIndex2(i);
2388 if (index!=-1) foundable++;
2389 //if (!c) continue;
2390 if (foundable<=30) sumgood1++;
2391 if (foundable<=50) {
2392 sumgood2++;
2393 }
2394 else{
2395 break;
2396 }
2397 }
2398 if (foundable>=30.){
2399 if (sumgood1<(th1*30.)) seed->Desactivate(10);
2400 }
2401 if (foundable>=50)
2402 if (sumgood2<(th2*50.)) seed->Desactivate(10);
2403}
1c53abe2 2404
1c53abe2 2405
d26d9159 2406Int_t AliTPCtrackerMI::RefitInward(AliESD *event)
2407{
2408 //
2409 // back propagation of ESD tracks
2410 //
2411 //return 0;
2412 fEvent = event;
2413 ReadSeeds(event,2);
2414 fIteration=2;
982aff31 2415 //PrepareForProlongation(fSeeds,1);
2416 PropagateForward2(fSeeds);
d26d9159 2417 Int_t nseed = fSeeds->GetEntriesFast();
2418 for (Int_t i=0;i<nseed;i++){
2419 AliTPCseed * seed = (AliTPCseed*) fSeeds->UncheckedAt(i);
2420 seed->PropagateTo(fParam->GetInnerRadiusLow());
2421 AliESDtrack *esd=event->GetTrack(i);
2422 seed->CookdEdx(0.02,0.6);
2423 CookLabel(seed,0.1); //For comparison only
2424 if (seed->GetNumberOfClusters()>20){
2425 esd->UpdateTrackParams(seed,AliESDtrack::kTPCrefit);
2426 }
2427 else{
2428 //printf("problem\n");
2429 }
2430 }
2431 fEvent =0;
2432 //WriteTracks();
2433 return 0;
2434}
2435
1c53abe2 2436
91162307 2437Int_t AliTPCtrackerMI::PropagateBack(AliESD *event)
2438{
2439 //
2440 // back propagation of ESD tracks
2441 //
1c53abe2 2442
91162307 2443 fEvent = event;
d26d9159 2444 fIteration = 1;
2445 ReadSeeds(event,0);
91162307 2446 PropagateBack(fSeeds);
2447 Int_t nseed = fSeeds->GetEntriesFast();
2448 for (Int_t i=0;i<nseed;i++){
2449 AliTPCseed * seed = (AliTPCseed*) fSeeds->UncheckedAt(i);
2450 AliESDtrack *esd=event->GetTrack(i);
d26d9159 2451 seed->CookdEdx(0.02,0.6);
91162307 2452 CookLabel(seed,0.1); //For comparison only
2453 esd->UpdateTrackParams(seed,AliESDtrack::kTPCout);
2454 }
2455 fEvent =0;
d26d9159 2456 //WriteTracks();
91162307 2457 return 0;
2458}
2459
2460
2461void AliTPCtrackerMI::DeleteSeeds()
2462{
b67e07dc 2463 //
2464 //delete Seeds
91162307 2465 Int_t nseed = fSeeds->GetEntriesFast();
2466 for (Int_t i=0;i<nseed;i++){
2467 AliTPCseed * seed = (AliTPCseed*)fSeeds->At(i);
2468 if (seed) delete fSeeds->RemoveAt(i);
2469 }
2470 delete fSeeds;
2471 fSeeds =0;
2472}
2473
d26d9159 2474void AliTPCtrackerMI::ReadSeeds(AliESD *event, Int_t direction)
91162307 2475{
2476 //
2477 //read seeds from the event
2478
2479 Int_t nentr=event->GetNumberOfTracks();
2480 Info("PropagateBack", "Number of ESD tracks: %d\n", nentr);
2481 if (fSeeds)
2482 DeleteSeeds();
2483 if (!fSeeds){
2484 fSeeds = new TObjArray;
2485 }
2486
2487 // Int_t ntrk=0;
2488 for (Int_t i=0; i<nentr; i++) {
2489 AliESDtrack *esd=event->GetTrack(i);
2490 ULong_t status=esd->GetStatus();
b67e07dc 2491 AliTPCtrack t(*esd);
91162307 2492 AliTPCseed *seed = new AliTPCseed(t,t.GetAlpha());
982aff31 2493 if ((status==AliESDtrack::kTPCin)&&(direction==1)) seed->ResetCovariance();
2494 if ( direction ==2 &&(status & AliESDtrack::kTRDrefit) == 0 ) seed->ResetCovariance();
2495
91162307 2496 //
2497 //
2498 // rotate to the local coordinate system
2499
2500 fSectors=fInnerSec; fN=fkNIS;
2501
2502 Double_t alpha=seed->GetAlpha() - fSectors->GetAlphaShift();
2503 if (alpha > 2.*TMath::Pi()) alpha -= 2.*TMath::Pi();
2504 if (alpha < 0. ) alpha += 2.*TMath::Pi();
2505 Int_t ns=Int_t(alpha/fSectors->GetAlpha())%fN;
2506 alpha =ns*fSectors->GetAlpha() + fSectors->GetAlphaShift();
2507 alpha-=seed->GetAlpha();
2508 if (!seed->Rotate(alpha)) continue;
d26d9159 2509 seed->fEsd = esd;
91162307 2510 //
d26d9159 2511 //seed->PropagateTo(fSectors->GetX(0));
91162307 2512 //
2513 // Int_t index = esd->GetTPCindex();
2514 //AliTPCseed * seed2= (AliTPCseed*)fSeeds->At(index);
d26d9159 2515 //if (direction==2){
2516 // AliTPCseed * seed2 = ReSeed(seed,0.,0.5,1.);
2517 // if (seed2) {
2518 // delete seed;
2519 // seed = seed2;
2520 // }
2521 //}
47966a6d 2522
91162307 2523 fSeeds->AddLast(seed);
2524 }
2525}
2526
2527
2528
2529//_____________________________________________________________________________
2530void AliTPCtrackerMI::MakeSeeds3(TObjArray * arr, Int_t sec, Int_t i1, Int_t i2, Float_t cuts[4],
2531 Float_t deltay, Int_t ddsec) {
2532 //-----------------------------------------------------------------
2533 // This function creates track seeds.
2534 // SEEDING WITH VERTEX CONSTRAIN
2535 //-----------------------------------------------------------------
2536 // cuts[0] - fP4 cut
2537 // cuts[1] - tan(phi) cut
2538 // cuts[2] - zvertex cut
2539 // cuts[3] - fP3 cut
2540 Int_t nin0 = 0;
2541 Int_t nin1 = 0;
2542 Int_t nin2 = 0;
2543 Int_t nin = 0;
2544 Int_t nout1 = 0;
2545 Int_t nout2 = 0;
2546
2547 Double_t x[5], c[15];
2548 // Int_t di = i1-i2;
2549 //
2550 AliTPCseed * seed = new AliTPCseed;
2551 Double_t alpha=fSectors->GetAlpha(), shift=fSectors->GetAlphaShift();
2552 Double_t cs=cos(alpha), sn=sin(alpha);
2553 //
2554 // Double_t x1 =fOuterSec->GetX(i1);
2555 //Double_t xx2=fOuterSec->GetX(i2);
2556
2557 Double_t x1 =GetXrow(i1);
2558 Double_t xx2=GetXrow(i2);
2559
2560 Double_t x3=GetX(), y3=GetY(), z3=GetZ();
2561
2562 Int_t imiddle = (i2+i1)/2; //middle pad row index
2563 Double_t xm = GetXrow(imiddle); // radius of middle pad-row
2564 const AliTPCRow& krm=GetRow(sec,imiddle); //middle pad -row
2565 //
2566 Int_t ns =sec;
2567
2568 const AliTPCRow& kr1=GetRow(ns,i1);
2569 Double_t ymax = GetMaxY(i1)-kr1.fDeadZone-1.5;
2570 Double_t ymaxm = GetMaxY(imiddle)-kr1.fDeadZone-1.5;
2571
2572 //
2573 // change cut on curvature if it can't reach this layer
2574 // maximal curvature set to reach it
2575 Double_t dvertexmax = TMath::Sqrt((x1-x3)*(x1-x3)+(ymax+5-y3)*(ymax+5-y3));
2576 if (dvertexmax*0.5*cuts[0]>0.85){
2577 cuts[0] = 0.85/(dvertexmax*0.5+1.);
2578 }
2579 Double_t r2min = 1/(cuts[0]*cuts[0]); //minimal square of radius given by cut
2580
2581 // Int_t ddsec = 1;
2582 if (deltay>0) ddsec = 0;
2583 // loop over clusters
2584 for (Int_t is=0; is < kr1; is++) {
2585 //
2586 if (kr1[is]->IsUsed(10)) continue;
2587 Double_t y1=kr1[is]->GetY(), z1=kr1[is]->GetZ();
2588 //if (TMath::Abs(y1)>ymax) continue;
2589
2590 if (deltay>0 && TMath::Abs(ymax-TMath::Abs(y1))> deltay ) continue; // seed only at the edge
2591
2592 // find possible directions
2593 Float_t anglez = (z1-z3)/(x1-x3);
2594 Float_t extraz = z1 - anglez*(x1-xx2); // extrapolated z
2595 //
2596 //
2597 //find rotation angles relative to line given by vertex and point 1
2598 Double_t dvertex2 = (x1-x3)*(x1-x3)+(y1-y3)*(y1-y3);
2599 Double_t dvertex = TMath::Sqrt(dvertex2);
2600 Double_t angle13 = TMath::ATan((y1-y3)/(x1-x3));
2601 Double_t cs13 = cos(-angle13), sn13 = sin(-angle13);
2602
2603 //
2604 // loop over 2 sectors
2605 Int_t dsec1=-ddsec;
2606 Int_t dsec2= ddsec;
2607 if (y1<0) dsec2= 0;
2608 if (y1>0) dsec1= 0;
2609
2610 Double_t dddz1=0; // direction of delta inclination in z axis
2611 Double_t dddz2=0;
2612 if ( (z1-z3)>0)
2613 dddz1 =1;
2614 else
2615 dddz2 =1;
2616 //
2617 for (Int_t dsec = dsec1; dsec<=dsec2;dsec++){
2618 Int_t sec2 = sec + dsec;
2619 //
2620 // AliTPCRow& kr2 = fOuterSec[(sec2+fkNOS)%fkNOS][i2];
2621 //AliTPCRow& kr2m = fOuterSec[(sec2+fkNOS)%fkNOS][imiddle];
2622 AliTPCRow& kr2 = GetRow((sec2+fkNOS)%fkNOS,i2);
2623 AliTPCRow& kr2m = GetRow((sec2+fkNOS)%fkNOS,imiddle);
2624 Int_t index1 = TMath::Max(kr2.Find(extraz-0.6-dddz1*TMath::Abs(z1)*0.05)-1,0);
2625 Int_t index2 = TMath::Min(kr2.Find(extraz+0.6+dddz2*TMath::Abs(z1)*0.05)+1,kr2);
2626
2627 // rotation angles to p1-p3
2628 Double_t cs13r = cos(-angle13+dsec*alpha)/dvertex, sn13r = sin(-angle13+dsec*alpha)/dvertex;
2629 Double_t x2, y2, z2;
2630 //
2631 // Double_t dymax = maxangle*TMath::Abs(x1-xx2);
2632
2633 //
2634 Double_t dxx0 = (xx2-x3)*cs13r;
2635 Double_t dyy0 = (xx2-x3)*sn13r;
2636 for (Int_t js=index1; js < index2; js++) {
2637 const AliTPCclusterMI *kcl = kr2[js];
2638 if (kcl->IsUsed(10)) continue;
2639 //
2640 //calcutate parameters
2641 //
2642 Double_t yy0 = dyy0 +(kcl->GetY()-y3)*cs13r;
2643 // stright track
2644 if (TMath::Abs(yy0)<0.000001) continue;
2645 Double_t xx0 = dxx0 -(kcl->GetY()-y3)*sn13r;
2646 Double_t y0 = 0.5*(xx0*xx0+yy0*yy0-xx0)/yy0;
2647 Double_t r02 = (0.25+y0*y0)*dvertex2;
2648 //curvature (radius) cut
2649 if (r02<r2min) continue;
2650
2651 nin0++;
2652 //
2653 Double_t c0 = 1/TMath::Sqrt(r02);
2654 if (yy0>0) c0*=-1.;
2655
2656
2657 //Double_t dfi0 = 2.*TMath::ASin(dvertex*c0*0.5);
2658 //Double_t dfi1 = 2.*TMath::ASin(TMath::Sqrt(yy0*yy0+(1-xx0)*(1-xx0))*dvertex*c0*0.5);
b67e07dc 2659 Double_t dfi0 = 2.*AliTPCFastMath::FastAsin(dvertex*c0*0.5);
2660 Double_t dfi1 = 2.*AliTPCFastMath::FastAsin(TMath::Sqrt(yy0*yy0+(1-xx0)*(1-xx0))*dvertex*c0*0.5);
91162307 2661 //
2662 //
2663 Double_t z0 = kcl->GetZ();
2664 Double_t zzzz2 = z1-(z1-z3)*dfi1/dfi0;
2665 if (TMath::Abs(zzzz2-z0)>0.5) continue;
2666 nin1++;
2667 //
2668 Double_t dip = (z1-z0)*c0/dfi1;
2669 Double_t x0 = (0.5*cs13+y0*sn13)*dvertex*c0;
2670 //
2671 y2 = kcl->GetY();
2672 if (dsec==0){
2673 x2 = xx2;
2674 z2 = kcl->GetZ();
2675 }
2676 else
2677 {
2678 // rotation
2679 z2 = kcl->GetZ();
2680 x2= xx2*cs-y2*sn*dsec;
2681 y2=+xx2*sn*dsec+y2*cs;
2682 }
2683
2684 x[0] = y1;
2685 x[1] = z1;
2686 x[2] = x0;
2687 x[3] = dip;
2688 x[4] = c0;
2689 //
2690 //
2691 // do we have cluster at the middle ?
2692 Double_t ym,zm;
2693 GetProlongation(x1,xm,x,ym,zm);
2694 UInt_t dummy;
2695 AliTPCclusterMI * cm=0;
2696 if (TMath::Abs(ym)-ymaxm<0){
2697 cm = krm.FindNearest2(ym,zm,1.0,0.6,dummy);
2698 if ((!cm) || (cm->IsUsed(10))) {
2699 continue;
2700 }
2701 }
2702 else{
2703 // rotate y1 to system 0
2704 // get state vector in rotated system
2705 Double_t yr1 = (-0.5*sn13+y0*cs13)*dvertex*c0;
2706 Double_t xr2 = x0*cs+yr1*sn*dsec;
2707 Double_t xr[5]={kcl->GetY(),kcl->GetZ(), xr2, dip, c0};
2708 //
2709 GetProlongation(xx2,xm,xr,ym,zm);
2710 if (TMath::Abs(ym)-ymaxm<0){
2711 cm = kr2m.FindNearest2(ym,zm,1.0,0.6,dummy);
2712 if ((!cm) || (cm->IsUsed(10))) {
2713 continue;
2714 }
2715 }
2716 }
2717
2718
2719 Double_t dym = 0;
2720 Double_t dzm = 0;
2721 if (cm){
2722 dym = ym - cm->GetY();
2723 dzm = zm - cm->GetZ();
2724 }
2725 nin2++;
2726
2727
2728 //
2729 //
2730 Double_t sy1=kr1[is]->GetSigmaY2()*2., sz1=kr1[is]->GetSigmaZ2()*2.;
2731 Double_t sy2=kcl->GetSigmaY2()*2., sz2=kcl->GetSigmaZ2()*2.;
2732 //Double_t sy3=400*3./12., sy=0.1, sz=0.1;
2733 Double_t sy3=25000*x[4]*x[4]+0.1, sy=0.1, sz=0.1;
2734 //Double_t sy3=25000*x[4]*x[4]*60+0.5, sy=0.1, sz=0.1;
2735
b67e07dc 2736 Double_t f40=(F1(x1,y1+sy,x2,y2,x3,y3)-x[4])/sy;
2737 Double_t f42=(F1(x1,y1,x2,y2+sy,x3,y3)-x[4])/sy;
2738 Double_t f43=(F1(x1,y1,x2,y2,x3,y3+sy)-x[4])/sy;
2739 Double_t f20=(F2(x1,y1+sy,x2,y2,x3,y3)-x[2])/sy;
2740 Double_t f22=(F2(x1,y1,x2,y2+sy,x3,y3)-x[2])/sy;
2741 Double_t f23=(F2(x1,y1,x2,y2,x3,y3+sy)-x[2])/sy;
91162307 2742
b67e07dc 2743 Double_t f30=(F3(x1,y1+sy,x2,y2,z1,z2)-x[3])/sy;
2744 Double_t f31=(F3(x1,y1,x2,y2,z1+sz,z2)-x[3])/sz;
2745 Double_t f32=(F3(x1,y1,x2,y2+sy,z1,z2)-x[3])/sy;
2746 Double_t f34=(F3(x1,y1,x2,y2,z1,z2+sz)-x[3])/sz;
91162307 2747
1c53abe2 2748 c[0]=sy1;
2749 c[1]=0.; c[2]=sz1;
2750 c[3]=f20*sy1; c[4]=0.; c[5]=f20*sy1*f20+f22*sy2*f22+f23*sy3*f23;
2751 c[6]=f30*sy1; c[7]=f31*sz1; c[8]=f30*sy1*f20+f32*sy2*f22;
2752 c[9]=f30*sy1*f30+f31*sz1*f31+f32*sy2*f32+f34*sz2*f34;
2753 c[10]=f40*sy1; c[11]=0.; c[12]=f40*sy1*f20+f42*sy2*f22+f43*sy3*f23;
2754 c[13]=f30*sy1*f40+f32*sy2*f42;
2755 c[14]=f40*sy1*f40+f42*sy2*f42+f43*sy3*f43;
91162307 2756
2757 // if (!BuildSeed(kr1[is],kcl,0,x1,x2,x3,x,c)) continue;
2758
1c53abe2 2759 UInt_t index=kr1.GetIndex(is);
91162307 2760 AliTPCseed *track=new(seed) AliTPCseed(index, x, c, x1, ns*alpha+shift);
2761
1c53abe2 2762 track->fIsSeeding = kTRUE;
91162307 2763 track->fSeed1 = i1;
2764 track->fSeed2 = i2;
2765 track->fSeedType=3;
c9427e08 2766
91162307 2767
2768 //if (dsec==0) {
2769 FollowProlongation(*track, (i1+i2)/2,1);
2770 Int_t foundable,found,shared;
2771 track->GetClusterStatistic((i1+i2)/2,i1, found, foundable, shared, kTRUE);
2772 if ((found<0.55*foundable) || shared>0.5*found || (track->GetSigmaY2()+track->GetSigmaZ2())>0.5){
2773 seed->Reset();
2774 seed->~AliTPCseed();
2775 continue;
2776 }
2777 //}
2778
2779 nin++;
2780 FollowProlongation(*track, i2,1);
2781
2782
2783 //Int_t rc = 1;
2784 track->fBConstrain =1;
2785 // track->fLastPoint = i1+fInnerSec->GetNRows(); // first cluster in track position
2786 track->fLastPoint = i1; // first cluster in track position
2787 track->fFirstPoint = track->fLastPoint;
2788
2789 if (track->GetNumberOfClusters()<(i1-i2)*0.5 ||
2790 track->GetNumberOfClusters() < track->fNFoundable*0.6 ||
2791 track->fNShared>0.4*track->GetNumberOfClusters() ) {
2792 seed->Reset();
2793 seed->~AliTPCseed();
c9427e08 2794 continue;
2795 }
91162307 2796 nout1++;
2797 // Z VERTEX CONDITION
2798 Double_t zv;
2799 zv = track->GetZ()+track->GetTgl()/track->GetC()*
2800 ( asin(-track->GetEta()) - asin(track->GetX()*track->GetC()-track->GetEta()));
2801 if (TMath::Abs(zv-z3)>cuts[2]) {
2802 FollowProlongation(*track, TMath::Max(i2-20,0));
2803 zv = track->GetZ()+track->GetTgl()/track->GetC()*
2804 ( asin(-track->GetEta()) - asin(track->GetX()*track->GetC()-track->GetEta()));
2805 if (TMath::Abs(zv-z3)>cuts[2]){
2806 FollowProlongation(*track, TMath::Max(i2-40,0));
2807 zv = track->GetZ()+track->GetTgl()/track->GetC()*
2808 ( asin(-track->GetEta()) - asin(track->GetX()*track->GetC()-track->GetEta()));
2809 if (TMath::Abs(zv-z3)>cuts[2] &&(track->GetNumberOfClusters() > track->fNFoundable*0.7)){
2810 // make seed without constrain
2811 AliTPCseed * track2 = MakeSeed(track,0.2,0.5,1.);
2812 FollowProlongation(*track2, i2,1);
2813 track2->fBConstrain = kFALSE;
2814 track2->fSeedType = 1;
2815 arr->AddLast(track2);
2816 seed->Reset();
2817 seed->~AliTPCseed();
2818 continue;
2819 }
2820 else{
2821 seed->Reset();
2822 seed->~AliTPCseed();
2823 continue;
2824
2825 }
2826 }
c9427e08 2827 }
1c53abe2 2828
91162307 2829 track->fSeedType =0;
2830 arr->AddLast(track);
2831 seed = new AliTPCseed;
2832 nout2++;
2833 // don't consider other combinations
2834 if (track->GetNumberOfClusters() > track->fNFoundable*0.8)
2835 break;
1c53abe2 2836 }
2837 }
2838 }
91162307 2839 if (fDebug>1){
2840 // printf("\nSeeding statiistic:\t%d\t%d\t%d\t%d\t%d\t%d",nin0,nin1,nin2,nin,nout1,nout2);
2841 }
2842 delete seed;
1c53abe2 2843}
2844
1627d1c4 2845
91162307 2846void AliTPCtrackerMI::MakeSeeds5(TObjArray * arr, Int_t sec, Int_t i1, Int_t i2, Float_t cuts[4],
2847 Float_t deltay) {
2848
2849
2850
1627d1c4 2851 //-----------------------------------------------------------------
91162307 2852 // This function creates track seeds.
1627d1c4 2853 //-----------------------------------------------------------------
91162307 2854 // cuts[0] - fP4 cut
2855 // cuts[1] - tan(phi) cut
2856 // cuts[2] - zvertex cut
2857 // cuts[3] - fP3 cut
2858
2859
2860 Int_t nin0 = 0;
2861 Int_t nin1 = 0;
2862 Int_t nin2 = 0;
2863 Int_t nin = 0;
2864 Int_t nout1 = 0;
2865 Int_t nout2 = 0;
2866 Int_t nout3 =0;
2867 Double_t x[5], c[15];
2868 //
2869 // make temporary seed
2870 AliTPCseed * seed = new AliTPCseed;
1627d1c4 2871 Double_t alpha=fOuterSec->GetAlpha(), shift=fOuterSec->GetAlphaShift();
2872 // Double_t cs=cos(alpha), sn=sin(alpha);
91162307 2873 //
2874 //
1627d1c4 2875
91162307 2876 // first 3 padrows
2877 Double_t x1 = GetXrow(i1-1);
2878 const AliTPCRow& kr1=GetRow(sec,i1-1);
2879 Double_t y1max = GetMaxY(i1-1)-kr1.fDeadZone-1.5;
2880 //
2881 Double_t x1p = GetXrow(i1);
2882 const AliTPCRow& kr1p=GetRow(sec,i1);
2883 //
2884 Double_t x1m = GetXrow(i1-2);
2885 const AliTPCRow& kr1m=GetRow(sec,i1-2);
1627d1c4 2886
91162307 2887 //
2888 //last 3 padrow for seeding
2889 AliTPCRow& kr3 = GetRow((sec+fkNOS)%fkNOS,i1-7);
2890 Double_t x3 = GetXrow(i1-7);
2891 // Double_t y3max= GetMaxY(i1-7)-kr3.fDeadZone-1.5;
2892 //
2893 AliTPCRow& kr3p = GetRow((sec+fkNOS)%fkNOS,i1-6);
2894 Double_t x3p = GetXrow(i1-6);
2895 //
2896 AliTPCRow& kr3m = GetRow((sec+fkNOS)%fkNOS,i1-8);
2897 Double_t x3m = GetXrow(i1-8);
1627d1c4 2898
91162307 2899 //
2900 //
2901 // middle padrow
2902 Int_t im = i1-4; //middle pad row index
2903 Double_t xm = GetXrow(im); // radius of middle pad-row
2904 const AliTPCRow& krm=GetRow(sec,im); //middle pad -row
2905 // Double_t ymmax = GetMaxY(im)-kr1.fDeadZone-1.5;
2906 //
2907 //
2908 Double_t deltax = x1-x3;
2909 Double_t dymax = deltax*cuts[1];
2910 Double_t dzmax = deltax*cuts[3];
2911 //
2912 // loop over clusters
2913 for (Int_t is=0; is < kr1; is++) {
1627d1c4 2914 //
91162307 2915 if (kr1[is]->IsUsed(10)) continue;
2916 Double_t y1=kr1[is]->GetY(), z1=kr1[is]->GetZ();
1627d1c4 2917 //
91162307 2918 if (deltay>0 && TMath::Abs(y1max-TMath::Abs(y1))> deltay ) continue; // seed only at the edge
2919 //
2920 Int_t index1 = TMath::Max(kr3.Find(z1-dzmax)-1,0);
2921 Int_t index2 = TMath::Min(kr3.Find(z1+dzmax)+1,kr3);
2922 //
2923 Double_t y3, z3;
1627d1c4 2924 //
1627d1c4 2925 //
91162307 2926 UInt_t index;
2927 for (Int_t js=index1; js < index2; js++) {
2928 const AliTPCclusterMI *kcl = kr3[js];
2929 if (kcl->IsUsed(10)) continue;
2930 y3 = kcl->GetY();
2931 // apply angular cuts
2932 if (TMath::Abs(y1-y3)>dymax) continue;
2933 x3 = x3;
2934 z3 = kcl->GetZ();
2935 if (TMath::Abs(z1-z3)>dzmax) continue;
2936 //
2937 Double_t angley = (y1-y3)/(x1-x3);
2938 Double_t anglez = (z1-z3)/(x1-x3);
2939 //
2940 Double_t erry = TMath::Abs(angley)*(x1-x1m)*0.5+0.5;
2941 Double_t errz = TMath::Abs(anglez)*(x1-x1m)*0.5+0.5;
2942 //
2943 Double_t yyym = angley*(xm-x1)+y1;
2944 Double_t zzzm = anglez*(xm-x1)+z1;
2945
2946 const AliTPCclusterMI *kcm = krm.FindNearest2(yyym,zzzm,erry,errz,index);
2947 if (!kcm) continue;
2948 if (kcm->IsUsed(10)) continue;
2949
2950 erry = TMath::Abs(angley)*(x1-x1m)*0.4+0.5;
2951 errz = TMath::Abs(anglez)*(x1-x1m)*0.4+0.5;
2952 //
2953 //
2954 //
2955 Int_t used =0;
2956 Int_t found =0;
2957 //
2958 // look around first
2959 const AliTPCclusterMI *kc1m = kr1m.FindNearest2(angley*(x1m-x1)+y1,
2960 anglez*(x1m-x1)+z1,
2961 erry,errz,index);
2962 //
2963 if (kc1m){
2964 found++;
2965 if (kc1m->IsUsed(10)) used++;
1627d1c4 2966 }
91162307 2967 const AliTPCclusterMI *kc1p = kr1p.FindNearest2(angley*(x1p-x1)+y1,
2968 anglez*(x1p-x1)+z1,
2969 erry,errz,index);
1627d1c4 2970 //
91162307 2971 if (kc1p){
2972 found++;
2973 if (kc1p->IsUsed(10)) used++;
1627d1c4 2974 }
91162307 2975 if (used>1) continue;
2976 if (found<1) continue;
1627d1c4 2977
91162307 2978 //
2979 // look around last
2980 const AliTPCclusterMI *kc3m = kr3m.FindNearest2(angley*(x3m-x3)+y3,
2981 anglez*(x3m-x3)+z3,
2982 erry,errz,index);
2983 //
2984 if (kc3m){
2985 found++;
2986 if (kc3m->IsUsed(10)) used++;
2987 }
2988 else
2989 continue;
2990 const AliTPCclusterMI *kc3p = kr3p.FindNearest2(angley*(x3p-x3)+y3,
2991 anglez*(x3p-x3)+z3,
2992 erry,errz,index);
2993 //
2994 if (kc3p){
2995 found++;
2996 if (kc3p->IsUsed(10)) used++;
2997 }
2998 else
2999 continue;
3000 if (used>1) continue;
3001 if (found<3) continue;
3002 //
3003 Double_t x2,y2,z2;
3004 x2 = xm;
3005 y2 = kcm->GetY();
3006 z2 = kcm->GetZ();
3007 //
3008
1627d1c4 3009 x[0]=y1;
3010 x[1]=z1;
b67e07dc 3011 x[4]=F1(x1,y1,x2,y2,x3,y3);
91162307 3012 //if (TMath::Abs(x[4]) >= cuts[0]) continue;
3013 nin0++;
3014 //
b67e07dc 3015 x[2]=F2(x1,y1,x2,y2,x3,y3);
91162307 3016 nin1++;
3017 //
b67e07dc 3018 x[3]=F3n(x1,y1,x2,y2,z1,z2,x[4]);
91162307 3019 //if (TMath::Abs(x[3]) > cuts[3]) continue;
3020 nin2++;
3021 //
3022 //
3023 Double_t sy1=0.1, sz1=0.1;
3024 Double_t sy2=0.1, sz2=0.1;
3025 Double_t sy3=0.1, sy=0.1, sz=0.1;
1627d1c4 3026
b67e07dc 3027 Double_t f40=(F1(x1,y1+sy,x2,y2,x3,y3)-x[4])/sy;
3028 Double_t f42=(F1(x1,y1,x2,y2+sy,x3,y3)-x[4])/sy;
3029 Double_t f43=(F1(x1,y1,x2,y2,x3,y3+sy)-x[4])/sy;
3030 Double_t f20=(F2(x1,y1+sy,x2,y2,x3,y3)-x[2])/sy;
3031 Double_t f22=(F2(x1,y1,x2,y2+sy,x3,y3)-x[2])/sy;
3032 Double_t f23=(F2(x1,y1,x2,y2,x3,y3+sy)-x[2])/sy;
91162307 3033
b67e07dc 3034 Double_t f30=(F3(x1,y1+sy,x2,y2,z1,z2)-x[3])/sy;
3035 Double_t f31=(F3(x1,y1,x2,y2,z1+sz,z2)-x[3])/sz;
3036 Double_t f32=(F3(x1,y1,x2,y2+sy,z1,z2)-x[3])/sy;
3037 Double_t f34=(F3(x1,y1,x2,y2,z1,z2+sz)-x[3])/sz;
1627d1c4 3038
3039 c[0]=sy1;
91162307 3040 c[1]=0.; c[2]=sz1;
1627d1c4 3041 c[3]=f20*sy1; c[4]=0.; c[5]=f20*sy1*f20+f22*sy2*f22+f23*sy3*f23;
3042 c[6]=f30*sy1; c[7]=f31*sz1; c[8]=f30*sy1*f20+f32*sy2*f22;
3043 c[9]=f30*sy1*f30+f31*sz1*f31+f32*sy2*f32+f34*sz2*f34;
3044 c[10]=f40*sy1; c[11]=0.; c[12]=f40*sy1*f20+f42*sy2*f22+f43*sy3*f23;
3045 c[13]=f30*sy1*f40+f32*sy2*f42;
3046 c[14]=f40*sy1*f40+f42*sy2*f42+f43*sy3*f43;
3047
91162307 3048 // if (!BuildSeed(kr1[is],kcl,0,x1,x2,x3,x,c)) continue;
3049
3050 UInt_t index=kr1.GetIndex(is);
3051 AliTPCseed *track=new(seed) AliTPCseed(index, x, c, x1, sec*alpha+shift);
3052
3053 track->fIsSeeding = kTRUE;
3054
3055 nin++;
3056 FollowProlongation(*track, i1-7,1);
3057 if (track->GetNumberOfClusters() < track->fNFoundable*0.75 ||
3058 track->fNShared>0.6*track->GetNumberOfClusters() || ( track->GetSigmaY2()+ track->GetSigmaZ2())>0.6){
3059 seed->Reset();
3060 seed->~AliTPCseed();
3061 continue;
3062 }
3063 nout1++;
3064 nout2++;
3065 //Int_t rc = 1;
3066 FollowProlongation(*track, i2,1);
3067 track->fBConstrain =0;
3068 track->fLastPoint = i1+fInnerSec->GetNRows(); // first cluster in track position
3069 track->fFirstPoint = track->fLastPoint;
3070
3071 if (track->GetNumberOfClusters()<(i1-i2)*0.5 ||
3072 track->GetNumberOfClusters()<track->fNFoundable*0.7 ||
3073 track->fNShared>2. || track->GetChi2()/track->GetNumberOfClusters()>6 || ( track->GetSigmaY2()+ track->GetSigmaZ2())>0.5 ) {
3074 seed->Reset();
3075 seed->~AliTPCseed();
3076 continue;
3077 }
3078
3079 {
3080 FollowProlongation(*track, TMath::Max(i2-10,0),1);
3081 AliTPCseed * track2 = MakeSeed(track,0.2,0.5,0.9);
3082 FollowProlongation(*track2, i2,1);
3083 track2->fBConstrain = kFALSE;
3084 track2->fSeedType = 4;
3085 arr->AddLast(track2);
3086 seed->Reset();
3087 seed->~AliTPCseed();
3088 }
3089
3090
3091 //arr->AddLast(track);
3092 //seed = new AliTPCseed;
3093 nout3++;
3094 }
3095 }
3096
3097 if (fDebug>1){
3098 // printf("\nSeeding statiistic:\t%d\t%d\t%d\t%d\t%d\t%d",nin0,nin1,nin2,nin,nout1,nout2,nout3);
3099 }
3100 delete seed;
3101}
3102
3103
3104//_____________________________________________________________________________
176aff27 3105void AliTPCtrackerMI::MakeSeeds2(TObjArray * arr, Int_t sec, Int_t i1, Int_t i2, Float_t */*cuts[4]*/,
3106 Float_t deltay, Bool_t /*bconstrain*/) {
91162307 3107 //-----------------------------------------------------------------
3108 // This function creates track seeds - without vertex constraint
3109 //-----------------------------------------------------------------
3110 // cuts[0] - fP4 cut - not applied
3111 // cuts[1] - tan(phi) cut
3112 // cuts[2] - zvertex cut - not applied
3113 // cuts[3] - fP3 cut
3114 Int_t nin0=0;
3115 Int_t nin1=0;
3116 Int_t nin2=0;
3117 Int_t nin3=0;
3118 // Int_t nin4=0;
3119 //Int_t nin5=0;
3120
3121
3122
3123 Double_t alpha=fOuterSec->GetAlpha(), shift=fOuterSec->GetAlphaShift();
3124 // Double_t cs=cos(alpha), sn=sin(alpha);
3125 Int_t row0 = (i1+i2)/2;
3126 Int_t drow = (i1-i2)/2;
3127 const AliTPCRow& kr0=fSectors[sec][row0];
3128 AliTPCRow * kr=0;
3129
3130 AliTPCpolyTrack polytrack;
3131 Int_t nclusters=fSectors[sec][row0];
3132 AliTPCseed * seed = new AliTPCseed;
3133
3134 Int_t sumused=0;
3135 Int_t cused=0;
3136 Int_t cnused=0;
3137 for (Int_t is=0; is < nclusters; is++) { //LOOP over clusters
3138 Int_t nfound =0;
3139 Int_t nfoundable =0;
3140 for (Int_t iter =1; iter<2; iter++){ //iterations
3141 const AliTPCRow& krm=fSectors[sec][row0-iter];
3142 const AliTPCRow& krp=fSectors[sec][row0+iter];
3143 const AliTPCclusterMI * cl= kr0[is];
3144
3145 if (cl->IsUsed(10)) {
3146 cused++;
3147 }
3148 else{
3149 cnused++;
3150 }
3151 Double_t x = kr0.GetX();
3152 // Initialization of the polytrack
3153 nfound =0;
3154 nfoundable =0;
3155 polytrack.Reset();
3156 //
3157 Double_t y0= cl->GetY();
3158 Double_t z0= cl->GetZ();
3159 Float_t erry = 0;
3160 Float_t errz = 0;
3161
3162 Double_t ymax = fSectors->GetMaxY(row0)-kr0.fDeadZone-1.5;
3163 if (deltay>0 && TMath::Abs(ymax-TMath::Abs(y0))> deltay ) continue; // seed only at the edge
3164
3165 erry = (0.5)*cl->GetSigmaY2()/TMath::Sqrt(cl->GetQ())*6;
3166 errz = (0.5)*cl->GetSigmaZ2()/TMath::Sqrt(cl->GetQ())*6;
3167 polytrack.AddPoint(x,y0,z0,erry, errz);
3168
3169 sumused=0;
3170 if (cl->IsUsed(10)) sumused++;
3171
3172
3173 Float_t roady = (5*TMath::Sqrt(cl->GetSigmaY2()+0.2)+1.)*iter;
3174 Float_t roadz = (5*TMath::Sqrt(cl->GetSigmaZ2()+0.2)+1.)*iter;
3175 //
3176 x = krm.GetX();
3177 AliTPCclusterMI * cl1 = krm.FindNearest(y0,z0,roady,roadz);
3178 if (cl1 && TMath::Abs(ymax-TMath::Abs(y0))) {
3179 erry = (0.5)*cl1->GetSigmaY2()/TMath::Sqrt(cl1->GetQ())*3;
3180 errz = (0.5)*cl1->GetSigmaZ2()/TMath::Sqrt(cl1->GetQ())*3;
3181 if (cl1->IsUsed(10)) sumused++;
3182 polytrack.AddPoint(x,cl1->GetY(),cl1->GetZ(),erry,errz);
3183 }
3184 //
3185 x = krp.GetX();
3186 AliTPCclusterMI * cl2 = krp.FindNearest(y0,z0,roady,roadz);
3187 if (cl2) {
3188 erry = (0.5)*cl2->GetSigmaY2()/TMath::Sqrt(cl2->GetQ())*3;
3189 errz = (0.5)*cl2->GetSigmaZ2()/TMath::Sqrt(cl2->GetQ())*3;
3190 if (cl2->IsUsed(10)) sumused++;
3191 polytrack.AddPoint(x,cl2->GetY(),cl2->GetZ(),erry,errz);
3192 }
3193 //
3194 if (sumused>0) continue;
3195 nin0++;
3196 polytrack.UpdateParameters();
3197 // follow polytrack
3198 roadz = 1.2;
3199 roady = 1.2;
3200 //
3201 Double_t yn,zn;
3202 nfoundable = polytrack.GetN();
3203 nfound = nfoundable;
3204 //
3205 for (Int_t ddrow = iter+1; ddrow<drow;ddrow++){
3206 Float_t maxdist = 0.8*(1.+3./(ddrow));
3207 for (Int_t delta = -1;delta<=1;delta+=2){
3208 Int_t row = row0+ddrow*delta;
3209 kr = &(fSectors[sec][row]);
3210 Double_t xn = kr->GetX();
3211 Double_t ymax = fSectors->GetMaxY(row)-kr->fDeadZone-1.5;
3212 polytrack.GetFitPoint(xn,yn,zn);
3213 if (TMath::Abs(yn)>ymax) continue;
3214 nfoundable++;
3215 AliTPCclusterMI * cln = kr->FindNearest(yn,zn,roady,roadz);
3216 if (cln) {
3217 Float_t dist = TMath::Sqrt( (yn-cln->GetY())*(yn-cln->GetY())+(zn-cln->GetZ())*(zn-cln->GetZ()));
3218 if (dist<maxdist){
3219 /*
3220 erry = (dist+0.3)*cln->GetSigmaY2()/TMath::Sqrt(cln->GetQ())*(1.+1./(ddrow));
3221 errz = (dist+0.3)*cln->GetSigmaZ2()/TMath::Sqrt(cln->GetQ())*(1.+1./(ddrow));
3222 if (cln->IsUsed(10)) {
3223 // printf("used\n");
3224 sumused++;
3225 erry*=2;
3226 errz*=2;
3227 }
3228 */
3229 erry=0.1;
3230 errz=0.1;
3231 polytrack.AddPoint(xn,cln->GetY(),cln->GetZ(),erry, errz);
3232 nfound++;
3233 }
3234 }
3235 }
3236 if ( (sumused>3) || (sumused>0.5*nfound) || (nfound<0.6*nfoundable)) break;
3237 polytrack.UpdateParameters();
3238 }
3239 }
3240 if ( (sumused>3) || (sumused>0.5*nfound)) {
3241 //printf("sumused %d\n",sumused);
3242 continue;
3243 }
3244 nin1++;
3245 Double_t dy,dz;
3246 polytrack.GetFitDerivation(kr0.GetX(),dy,dz);
3247 AliTPCpolyTrack track2;
3248
3249 polytrack.Refit(track2,0.5+TMath::Abs(dy)*0.3,0.4+TMath::Abs(dz)*0.3);
3250 if (track2.GetN()<0.5*nfoundable) continue;
3251 nin2++;
3252
3253 if ((nfound>0.6*nfoundable) &&( nfoundable>0.4*(i1-i2))) {
3254 //
3255 // test seed with and without constrain
3256 for (Int_t constrain=0; constrain<=0;constrain++){
3257 // add polytrack candidate
3258
3259 Double_t x[5], c[15];
3260 Double_t x1,x2,x3,y1,y2,y3,z1,z2,z3;
3261 track2.GetBoundaries(x3,x1);
3262 x2 = (x1+x3)/2.;
3263 track2.GetFitPoint(x1,y1,z1);
3264 track2.GetFitPoint(x2,y2,z2);
3265 track2.GetFitPoint(x3,y3,z3);
3266 //
3267 //is track pointing to the vertex ?
3268 Double_t x0,y0,z0;
3269 x0=0;
3270 polytrack.GetFitPoint(x0,y0,z0);
3271
3272 if (constrain) {
3273 x2 = x3;
3274 y2 = y3;
3275 z2 = z3;
3276
3277 x3 = 0;
3278 y3 = 0;
3279 z3 = 0;
3280 }
3281 x[0]=y1;
3282 x[1]=z1;
b67e07dc 3283 x[4]=F1(x1,y1,x2,y2,x3,y3);
91162307 3284
3285 // if (TMath::Abs(x[4]) >= cuts[0]) continue; //
b67e07dc 3286 x[2]=F2(x1,y1,x2,y2,x3,y3);
91162307 3287
3288 //if (TMath::Abs(x[4]*x1-x[2]) >= cuts[1]) continue;
b67e07dc 3289 //x[3]=F3(x1,y1,x2,y2,z1,z2);
3290 x[3]=F3n(x1,y1,x3,y3,z1,z3,x[4]);
91162307 3291 //if (TMath::Abs(x[3]) > cuts[3]) continue;
3292
3293
3294 Double_t sy =0.1, sz =0.1;
3295 Double_t sy1=0.02, sz1=0.02;
3296 Double_t sy2=0.02, sz2=0.02;
3297 Double_t sy3=0.02;
3298
3299 if (constrain){
3300 sy3=25000*x[4]*x[4]+0.1, sy=0.1, sz=0.1;
3301 }
3302
b67e07dc 3303 Double_t f40=(F1(x1,y1+sy,x2,y2,x3,y3)-x[4])/sy;
3304 Double_t f42=(F1(x1,y1,x2,y2+sy,x3,y3)-x[4])/sy;
3305 Double_t f43=(F1(x1,y1,x2,y2,x3,y3+sy)-x[4])/sy;
3306 Double_t f20=(F2(x1,y1+sy,x2,y2,x3,y3)-x[2])/sy;
3307 Double_t f22=(F2(x1,y1,x2,y2+sy,x3,y3)-x[2])/sy;
3308 Double_t f23=(F2(x1,y1,x2,y2,x3,y3+sy)-x[2])/sy;
3309
3310 Double_t f30=(F3(x1,y1+sy,x3,y3,z1,z3)-x[3])/sy;
3311 Double_t f31=(F3(x1,y1,x3,y3,z1+sz,z3)-x[3])/sz;
3312 Double_t f32=(F3(x1,y1,x3,y3+sy,z1,z3)-x[3])/sy;
3313 Double_t f34=(F3(x1,y1,x3,y3,z1,z3+sz)-x[3])/sz;
91162307 3314
3315
3316 c[0]=sy1;
3317 c[1]=0.; c[2]=sz1;
3318 c[3]=f20*sy1; c[4]=0.; c[5]=f20*sy1*f20+f22*sy2*f22+f23*sy3*f23;
3319 c[6]=f30*sy1; c[7]=f31*sz1; c[8]=f30*sy1*f20+f32*sy2*f22;
3320 c[9]=f30*sy1*f30+f31*sz1*f31+f32*sy2*f32+f34*sz2*f34;
3321 c[10]=f40*sy1; c[11]=0.; c[12]=f40*sy1*f20+f42*sy2*f22+f43*sy3*f23;
3322 c[13]=f30*sy1*f40+f32*sy2*f42;
3323 c[14]=f40*sy1*f40+f42*sy2*f42+f43*sy3*f43;
3324
3325 //Int_t row1 = fSectors->GetRowNumber(x1);
3326 Int_t row1 = GetRowNumber(x1);
3327
3328 UInt_t index=0;
3329 //kr0.GetIndex(is);
3330 AliTPCseed *track=new (seed) AliTPCseed(index, x, c, x1, sec*alpha+shift);
3331 track->fIsSeeding = kTRUE;
3332 Int_t rc=FollowProlongation(*track, i2);
3333 if (constrain) track->fBConstrain =1;
3334 else
3335 track->fBConstrain =0;
3336 track->fLastPoint = row1+fInnerSec->GetNRows(); // first cluster in track position
3337 track->fFirstPoint = track->fLastPoint;
3338
3339 if (rc==0 || track->GetNumberOfClusters()<(i1-i2)*0.5 ||
3340 track->GetNumberOfClusters() < track->fNFoundable*0.6 ||
3341 track->fNShared>0.4*track->GetNumberOfClusters()) {
3342 //delete track;
3343 seed->Reset();
3344 seed->~AliTPCseed();
3345 }
3346 else {
3347 arr->AddLast(track);
3348 seed = new AliTPCseed;
3349 }
3350 nin3++;
3351 }
3352 } // if accepted seed
3353 }
3354 if (fDebug>1){
3355 printf("\nSeeding statiistic:\t%d\t%d\t%d\t%d",nin0,nin1,nin2,nin3);
3356 }
3357 delete seed;
3358}
3359
3360
3361AliTPCseed *AliTPCtrackerMI::MakeSeed(AliTPCseed *track, Float_t r0, Float_t r1, Float_t r2)
3362{
3363 //
3364 //
d26d9159 3365 //reseed using track points
91162307 3366 Int_t p0 = int(r0*track->GetNumberOfClusters()); // point 0
3367 Int_t p1 = int(r1*track->GetNumberOfClusters());
3368 Int_t p2 = int(r2*track->GetNumberOfClusters()); // last point
176aff27 3369 Int_t pp2=0;
91162307 3370 Double_t x0[3],x1[3],x2[3];
3371 x0[0]=-1;
3372 x0[0]=-1;
3373 x0[0]=-1;
3374
3375 // find track position at given ratio of the length
3376 Int_t sec0, sec1, sec2;
176aff27 3377 sec0=0;
3378 sec1=0;
3379 sec2=0;
91162307 3380 Int_t index=-1;
3381 Int_t clindex;
3382 for (Int_t i=0;i<160;i++){
3383 if (track->fClusterPointer[i]){
3384 index++;
3385 AliTPCTrackerPoint *trpoint =track->GetTrackPoint(i);
3386 if ( (index<p0) || x0[0]<0 ){
3387 if (trpoint->GetX()>1){
3388 clindex = track->GetClusterIndex2(i);
3389 if (clindex>0){
3390 x0[0] = trpoint->GetX();
3391 x0[1] = trpoint->GetY();
3392 x0[2] = trpoint->GetZ();
3393 sec0 = ((clindex&0xff000000)>>24)%18;
3394 }
3395 }
3396 }
3397
3398 if ( (index<p1) &&(trpoint->GetX()>1)){
3399 clindex = track->GetClusterIndex2(i);
3400 if (clindex>0){
3401 x1[0] = trpoint->GetX();
3402 x1[1] = trpoint->GetY();
3403 x1[2] = trpoint->GetZ();
3404 sec1 = ((clindex&0xff000000)>>24)%18;
3405 }
3406 }
3407 if ( (index<p2) &&(trpoint->GetX()>1)){
3408 clindex = track->GetClusterIndex2(i);
3409 if (clindex>0){
3410 x2[0] = trpoint->GetX();
3411 x2[1] = trpoint->GetY();
3412 x2[2] = trpoint->GetZ();
3413 sec2 = ((clindex&0xff000000)>>24)%18;
3414 pp2 = i;
3415 }
3416 }
3417 }
3418 }
3419
3420 Double_t alpha, cs,sn, xx2,yy2;
3421 //
3422 alpha = (sec1-sec2)*fSectors->GetAlpha();
3423 cs = TMath::Cos(alpha);
3424 sn = TMath::Sin(alpha);
3425 xx2= x1[0]*cs-x1[1]*sn;
3426 yy2= x1[0]*sn+x1[1]*cs;
3427 x1[0] = xx2;
3428 x1[1] = yy2;
3429 //
3430 alpha = (sec0-sec2)*fSectors->GetAlpha();
3431 cs = TMath::Cos(alpha);
3432 sn = TMath::Sin(alpha);
3433 xx2= x0[0]*cs-x0[1]*sn;
3434 yy2= x0[0]*sn+x0[1]*cs;
3435 x0[0] = xx2;
3436 x0[1] = yy2;
3437 //
3438 //
3439 //
3440 Double_t x[5],c[15];
3441 //
3442 x[0]=x2[1];
3443 x[1]=x2[2];
b67e07dc 3444 x[4]=F1(x2[0],x2[1],x1[0],x1[1],x0[0],x0[1]);
91162307 3445 // if (x[4]>1) return 0;
b67e07dc 3446 x[2]=F2(x2[0],x2[1],x1[0],x1[1],x0[0],x0[1]);
3447 x[3]=F3n(x2[0],x2[1],x0[0],x0[1],x2[2],x0[2],x[4]);
91162307 3448 //if (TMath::Abs(x[3]) > 2.2) return 0;
3449 //if (TMath::Abs(x[2]) > 1.99) return 0;
3450 //
3451 Double_t sy =0.1, sz =0.1;
3452 //
3453 Double_t sy1=0.02+track->GetSigmaY2(), sz1=0.02+track->GetSigmaZ2();
3454 Double_t sy2=0.01+track->GetSigmaY2(), sz2=0.01+track->GetSigmaZ2();
3455 Double_t sy3=0.01+track->GetSigmaY2();
3456 //
b67e07dc 3457 Double_t f40=(F1(x2[0],x2[1]+sy,x1[0],x1[1],x0[0],x0[1])-x[4])/sy;
3458 Double_t f42=(F1(x2[0],x2[1],x1[0],x1[1]+sy,x0[0],x0[1])-x[4])/sy;
3459 Double_t f43=(F1(x2[0],x2[1],x1[0],x1[1],x0[0],x0[1]+sy)-x[4])/sy;
3460 Double_t f20=(F2(x2[0],x2[1]+sy,x1[0],x1[1],x0[0],x0[1])-x[2])/sy;
3461 Double_t f22=(F2(x2[0],x2[1],x1[0],x1[1]+sy,x0[0],x0[1])-x[2])/sy;
3462 Double_t f23=(F2(x2[0],x2[1],x1[0],x1[1],x0[0],x0[1]+sy)-x[2])/sy;
3463 //
3464 Double_t f30=(F3(x2[0],x2[1]+sy,x0[0],x0[1],x2[2],x0[2])-x[3])/sy;
3465 Double_t f31=(F3(x2[0],x2[1],x0[0],x0[1],x2[2]+sz,x0[2])-x[3])/sz;
3466 Double_t f32=(F3(x2[0],x2[1],x0[0],x0[1]+sy,x2[2],x0[2])-x[3])/sy;
3467 Double_t f34=(F3(x2[0],x2[1],x0[0],x0[1],x2[2],x0[2]+sz)-x[3])/sz;
91162307 3468
3469
3470 c[0]=sy1;
3471 c[1]=0.; c[2]=sz1;
3472 c[3]=f20*sy1; c[4]=0.; c[5]=f20*sy1*f20+f22*sy2*f22+f23*sy3*f23;
3473 c[6]=f30*sy1; c[7]=f31*sz1; c[8]=f30*sy1*f20+f32*sy2*f22;
3474 c[9]=f30*sy1*f30+f31*sz1*f31+f32*sy2*f32+f34*sz2*f34;
3475 c[10]=f40*sy1; c[11]=0.; c[12]=f40*sy1*f20+f42*sy2*f22+f43*sy3*f23;
3476 c[13]=f30*sy1*f40+f32*sy2*f42;
3477 c[14]=f40*sy1*f40+f42*sy2*f42+f43*sy3*f43;
3478
3479 // Int_t row1 = fSectors->GetRowNumber(x2[0]);
3480 AliTPCseed *seed=new AliTPCseed(0, x, c, x2[0], sec2*fSectors->GetAlpha()+fSectors->GetAlphaShift());
3481 // Double_t y0,z0,y1,z1, y2,z2;
3482 //seed->GetProlongation(x0[0],y0,z0);
3483 // seed->GetProlongation(x1[0],y1,z1);
3484 //seed->GetProlongation(x2[0],y2,z2);
3485 // seed =0;
3486 seed->fLastPoint = pp2;
3487 seed->fFirstPoint = pp2;
3488
3489
3490 return seed;
3491}
3492
d26d9159 3493
3494AliTPCseed *AliTPCtrackerMI::ReSeed(AliTPCseed *track, Float_t r0, Float_t r1, Float_t r2)
3495{
3496 //
3497 //
3498 //reseed using founded clusters
3499 //
3500 // Find the number of clusters
3501 Int_t nclusters = 0;
3502 for (Int_t irow=0;irow<160;irow++){
3503 if (track->GetClusterIndex(irow)>0) nclusters++;
3504 }
3505 //
3506 Int_t ipos[3];
3507 ipos[0] = TMath::Max(int(r0*nclusters),0); // point 0 cluster
3508 ipos[1] = TMath::Min(int(r1*nclusters),nclusters-1); //
3509 ipos[2] = TMath::Min(int(r2*nclusters),nclusters-1); // last point
3510 //
3511 //
3512 Double_t xyz[3][3];
3513 Int_t row[3],sec[3]={0,0,0};
3514 //
3515 // find track row position at given ratio of the length
3516 Int_t index=-1;
3517 for (Int_t irow=0;irow<160;irow++){
3518 if (track->GetClusterIndex2(irow)<0) continue;
3519 index++;
3520 for (Int_t ipoint=0;ipoint<3;ipoint++){
3521 if (index<=ipos[ipoint]) row[ipoint] = irow;
3522 }
3523 }
3524 //
3525 //Get cluster and sector position
3526 for (Int_t ipoint=0;ipoint<3;ipoint++){
3527 Int_t clindex = track->GetClusterIndex2(row[ipoint]);
3528 AliTPCclusterMI * cl = GetClusterMI(clindex);
3529 if (cl==0) {
3530 printf("Bug\n");
47966a6d 3531 // AliTPCclusterMI * cl = GetClusterMI(clindex);
d26d9159 3532 return 0;
3533 }
3534 sec[ipoint] = ((clindex&0xff000000)>>24)%18;
3535 xyz[ipoint][0] = GetXrow(row[ipoint]);
3536 xyz[ipoint][1] = cl->GetY();
3537 xyz[ipoint][2] = cl->GetZ();
3538 }
3539 //
3540 //
3541 // Calculate seed state vector and covariance matrix
3542
3543 Double_t alpha, cs,sn, xx2,yy2;
3544 //
3545 alpha = (sec[1]-sec[2])*fSectors->GetAlpha();
3546 cs = TMath::Cos(alpha);
3547 sn = TMath::Sin(alpha);
3548 xx2= xyz[1][0]*cs-xyz[1][1]*sn;
3549 yy2= xyz[1][0]*sn+xyz[1][1]*cs;
3550 xyz[1][0] = xx2;
3551 xyz[1][1] = yy2;
3552 //
3553 alpha = (sec[0]-sec[2])*fSectors->GetAlpha();
3554 cs = TMath::Cos(alpha);
3555 sn = TMath::Sin(alpha);
3556 xx2= xyz[0][0]*cs-xyz[0][1]*sn;
3557 yy2= xyz[0][0]*sn+xyz[0][1]*cs;
3558 xyz[0][0] = xx2;
3559 xyz[0][1] = yy2;
3560 //
3561 //
3562 //
3563 Double_t x[5],c[15];
3564 //
3565 x[0]=xy