Changes in the AIR material. Unused materials commented out (Guillermo)
[u/mrichter/AliRoot.git] / TPC / AliTPCseed.cxx
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81e97e0d 1/**************************************************************************
2 * Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved. *
3 * *
4 * Author: The ALICE Off-line Project. *
5 * Contributors are mentioned in the code where appropriate. *
6 * *
7 * Permission to use, copy, modify and distribute this software and its *
8 * documentation strictly for non-commercial purposes is hereby granted *
9 * without fee, provided that the above copyright notice appears in all *
10 * copies and that both the copyright notice and this permission notice *
11 * appear in the supporting documentation. The authors make no claims *
12 * about the suitability of this software for any purpose. It is *
13 * provided "as is" without express or implied warranty. *
14 **************************************************************************/
15
16
17
18
19//-----------------------------------------------------------------
20// Implementation of the TPC seed class
21// This class is used by the AliTPCtrackerMI class
22// Origin: Marian Ivanov, CERN, Marian.Ivanov@cern.ch
23//-----------------------------------------------------------------
24#include "TClonesArray.h"
25#include "AliTPCseed.h"
3f82c4f2 26#include "AliTPCReconstructor.h"
81e97e0d 27
28ClassImp(AliTPCseed)
29
30
31
32fab534 32AliTPCseed::AliTPCseed():
33 AliTPCtrack(),
34 fEsd(0x0),
2928bdf0 35 fClusterOwner(kFALSE),
32fab534 36 fPoints(0x0),
37 fEPoints(0x0),
38 fRow(0),
39 fSector(-1),
40 fRelativeSector(-1),
41 fCurrentSigmaY2(1e10),
42 fCurrentSigmaZ2(1e10),
43 fErrorY2(1e10),
44 fErrorZ2(1e10),
45 fCurrentCluster(0x0),
46 fCurrentClusterIndex1(-1),
47 fInDead(kFALSE),
48 fIsSeeding(kFALSE),
49 fNoCluster(0),
50 fSort(0),
51 fBSigned(kFALSE),
52 fSeedType(0),
53 fSeed1(-1),
54 fSeed2(-1),
55 fMAngular(0),
19b00333 56 fCircular(0),
57 fClusterMap(159),
58 fSharedMap(159)
32fab534 59{
81e97e0d 60 //
5c09947e 61 for (Int_t i=0;i<160;i++) SetClusterIndex2(i,-3);
81e97e0d 62 for (Int_t i=0;i<160;i++) fClusterPointer[i]=0;
63 for (Int_t i=0;i<3;i++) fKinkIndexes[i]=0;
32fab534 64 for (Int_t i=0;i<AliPID::kSPECIES;i++) fTPCr[i]=0.2;
65 for (Int_t i=0;i<4;i++) {
66 fDEDX[i] = 0.;
67 fSDEDX[i] = 1e10;
68 fNCDEDX[i] = 0;
69 }
70 for (Int_t i=0;i<12;i++) fOverlapLabels[i] = -1;
19b00333 71 for (Int_t i=0;i<160;i++) fClusterMap[i]=kFALSE;
72 for (Int_t i=0;i<160;i++) fSharedMap[i]=kFALSE;
81e97e0d 73}
32fab534 74
2928bdf0 75AliTPCseed::AliTPCseed(const AliTPCseed &s, Bool_t clusterOwner):
32fab534 76 AliTPCtrack(s),
77 fEsd(0x0),
2928bdf0 78 fClusterOwner(clusterOwner),
32fab534 79 fPoints(0x0),
80 fEPoints(0x0),
81 fRow(0),
82 fSector(-1),
83 fRelativeSector(-1),
84 fCurrentSigmaY2(1e10),
85 fCurrentSigmaZ2(1e10),
86 fErrorY2(1e10),
87 fErrorZ2(1e10),
88 fCurrentCluster(0x0),
89 fCurrentClusterIndex1(-1),
90 fInDead(kFALSE),
91 fIsSeeding(kFALSE),
92 fNoCluster(0),
93 fSort(0),
94 fBSigned(kFALSE),
95 fSeedType(0),
96 fSeed1(-1),
97 fSeed2(-1),
98 fMAngular(0),
19b00333 99 fCircular(0),
100 fClusterMap(s.fClusterMap),
101 fSharedMap(s.fSharedMap)
32fab534 102{
81e97e0d 103 //---------------------
104 // dummy copy constructor
105 //-------------------------
2928bdf0 106 for (Int_t i=0;i<160;i++) {
107 fClusterPointer[i]=0;
108 if (fClusterOwner){
109 if (s.fClusterPointer[i])
110 fClusterPointer[i] = new AliTPCclusterMI(*(s.fClusterPointer[i]));
111 }else{
112 fClusterPointer[i] = s.fClusterPointer[i];
113 }
114 fTrackPoints[i] = s.fTrackPoints[i];
115 }
81e97e0d 116 for (Int_t i=0;i<160;i++) fIndex[i] = s.fIndex[i];
5c09947e 117 for (Int_t i=0;i<AliPID::kSPECIES;i++) fTPCr[i]=s.fTPCr[i];
118 for (Int_t i=0;i<4;i++) {
119 fDEDX[i] = s.fDEDX[i];
120 fSDEDX[i] = s.fSDEDX[i];
121 fNCDEDX[i] = s.fNCDEDX[i];
122 }
123 for (Int_t i=0;i<12;i++) fOverlapLabels[i] = s.fOverlapLabels[i];
19b00333 124
81e97e0d 125}
5c09947e 126
127
32fab534 128AliTPCseed::AliTPCseed(const AliTPCtrack &t):
129 AliTPCtrack(t),
130 fEsd(0x0),
2928bdf0 131 fClusterOwner(kFALSE),
32fab534 132 fPoints(0x0),
133 fEPoints(0x0),
134 fRow(0),
135 fSector(-1),
136 fRelativeSector(-1),
137 fCurrentSigmaY2(1e10),
138 fCurrentSigmaZ2(1e10),
139 fErrorY2(1e10),
140 fErrorZ2(1e10),
141 fCurrentCluster(0x0),
142 fCurrentClusterIndex1(-1),
143 fInDead(kFALSE),
144 fIsSeeding(kFALSE),
145 fNoCluster(0),
146 fSort(0),
147 fBSigned(kFALSE),
148 fSeedType(0),
149 fSeed1(-1),
150 fSeed2(-1),
151 fMAngular(0),
19b00333 152 fCircular(0),
153 fClusterMap(159),
154 fSharedMap(159)
32fab534 155{
81e97e0d 156 //
32fab534 157 // Constructor from AliTPCtrack
158 //
159 fFirstPoint =0;
105b1b81 160 for (Int_t i=0;i<5;i++) fTPCr[i]=0.2;
81e97e0d 161 for (Int_t i=0;i<160;i++) {
162 fClusterPointer[i] = 0;
163 Int_t index = t.GetClusterIndex(i);
164 if (index>=-1){
165 SetClusterIndex2(i,index);
166 }
167 else{
168 SetClusterIndex2(i,-3);
169 }
170 }
32fab534 171 for (Int_t i=0;i<4;i++) {
172 fDEDX[i] = 0.;
173 fSDEDX[i] = 1e10;
174 fNCDEDX[i] = 0;
175 }
176 for (Int_t i=0;i<12;i++) fOverlapLabels[i] = -1;
19b00333 177 for (Int_t i=0;i<160;i++) fClusterMap[i]=kFALSE;
178 for (Int_t i=0;i<160;i++) fSharedMap[i]=kFALSE;
81e97e0d 179}
180
6c94f330 181AliTPCseed::AliTPCseed(Double_t xr, Double_t alpha, const Double_t xx[5],
182 const Double_t cc[15], Int_t index):
183 AliTPCtrack(xr, alpha, xx, cc, index),
32fab534 184 fEsd(0x0),
2928bdf0 185 fClusterOwner(kFALSE),
32fab534 186 fPoints(0x0),
187 fEPoints(0x0),
188 fRow(0),
189 fSector(-1),
190 fRelativeSector(-1),
191 fCurrentSigmaY2(1e10),
192 fCurrentSigmaZ2(1e10),
193 fErrorY2(1e10),
194 fErrorZ2(1e10),
195 fCurrentCluster(0x0),
196 fCurrentClusterIndex1(-1),
197 fInDead(kFALSE),
198 fIsSeeding(kFALSE),
199 fNoCluster(0),
200 fSort(0),
201 fBSigned(kFALSE),
202 fSeedType(0),
203 fSeed1(-1),
204 fSeed2(-1),
205 fMAngular(0),
19b00333 206 fCircular(0),
207 fClusterMap(159),
208 fSharedMap(159)
32fab534 209{
210 //
211 // Constructor
81e97e0d 212 //
32fab534 213 fFirstPoint =0;
5c09947e 214 for (Int_t i=0;i<160;i++) SetClusterIndex2(i,-3);
81e97e0d 215 for (Int_t i=0;i<160;i++) fClusterPointer[i]=0;
81e97e0d 216 for (Int_t i=0;i<5;i++) fTPCr[i]=0.2;
32fab534 217 for (Int_t i=0;i<4;i++) {
218 fDEDX[i] = 0.;
219 fSDEDX[i] = 1e10;
220 fNCDEDX[i] = 0;
221 }
222 for (Int_t i=0;i<12;i++) fOverlapLabels[i] = -1;
81e97e0d 223}
224
225AliTPCseed::~AliTPCseed(){
226 //
227 // destructor
228 if (fPoints) delete fPoints;
229 fPoints =0;
230 if (fEPoints) delete fEPoints;
231 fEPoints = 0;
232 fNoCluster =0;
2928bdf0 233 if (fClusterOwner){
234 for (Int_t icluster=0; icluster<160; icluster++){
235 delete fClusterPointer[icluster];
236 }
237 }
19b00333 238 for (Int_t i=0;i<160;i++) fClusterMap[i]=kFALSE;
239 for (Int_t i=0;i<160;i++) fSharedMap[i]=kFALSE;
81e97e0d 240}
179c6296 241//_________________________________________________
242AliTPCseed & AliTPCseed::operator =(const AliTPCseed & param)
243{
244 //
245 // assignment operator - dummy
246 //
247 fRow=param.fRow;
248 return (*this);
249}
250//____________________________________________________
81e97e0d 251AliTPCTrackerPoint * AliTPCseed::GetTrackPoint(Int_t i)
252{
253 //
254 //
255 return &fTrackPoints[i];
256}
257
258void AliTPCseed::RebuildSeed()
259{
260 //
261 // rebuild seed to be ready for storing
262 AliTPCclusterMI cldummy;
263 cldummy.SetQ(0);
264 AliTPCTrackPoint pdummy;
b9671574 265 pdummy.GetTPoint().SetShared(10);
81e97e0d 266 for (Int_t i=0;i<160;i++){
267 AliTPCclusterMI * cl0 = fClusterPointer[i];
268 AliTPCTrackPoint *trpoint = (AliTPCTrackPoint*)fPoints->UncheckedAt(i);
269 if (cl0){
270 trpoint->GetTPoint() = *(GetTrackPoint(i));
271 trpoint->GetCPoint() = *cl0;
272 trpoint->GetCPoint().SetQ(TMath::Abs(cl0->GetQ()));
273 }
274 else{
275 *trpoint = pdummy;
276 trpoint->GetCPoint()= cldummy;
277 }
278
279 }
280
281}
282
283
284Double_t AliTPCseed::GetDensityFirst(Int_t n)
285{
286 //
287 //
288 // return cluster for n rows bellow first point
289 Int_t nfoundable = 1;
290 Int_t nfound = 1;
291 for (Int_t i=fLastPoint-1;i>0&&nfoundable<n; i--){
292 Int_t index = GetClusterIndex2(i);
293 if (index!=-1) nfoundable++;
294 if (index>0) nfound++;
295 }
296 if (nfoundable<n) return 0;
297 return Double_t(nfound)/Double_t(nfoundable);
298
299}
300
301
302void AliTPCseed::GetClusterStatistic(Int_t first, Int_t last, Int_t &found, Int_t &foundable, Int_t &shared, Bool_t plus2)
303{
304 // get cluster stat. on given region
305 //
306 found = 0;
307 foundable = 0;
308 shared =0;
309 for (Int_t i=first;i<last; i++){
310 Int_t index = GetClusterIndex2(i);
311 if (index!=-1) foundable++;
312 if (fClusterPointer[i]) {
313 found++;
314 }
315 else
316 continue;
317
318 if (fClusterPointer[i]->IsUsed(10)) {
319 shared++;
320 continue;
321 }
322 if (!plus2) continue; //take also neighborhoud
323 //
324 if ( (i>0) && fClusterPointer[i-1]){
325 if (fClusterPointer[i-1]->IsUsed(10)) {
326 shared++;
327 continue;
328 }
329 }
330 if ( fClusterPointer[i+1]){
331 if (fClusterPointer[i+1]->IsUsed(10)) {
332 shared++;
333 continue;
334 }
335 }
336
337 }
338 //if (shared>found){
339 //Error("AliTPCseed::GetClusterStatistic","problem\n");
340 //}
341}
342
343
344
345
346
347void AliTPCseed::Reset(Bool_t all)
348{
349 //
350 //
351 SetNumberOfClusters(0);
352 fNFoundable = 0;
353 SetChi2(0);
6c94f330 354 ResetCovariance(10.);
81e97e0d 355 /*
356 if (fTrackPoints){
357 for (Int_t i=0;i<8;i++){
358 delete [] fTrackPoints[i];
359 }
360 delete fTrackPoints;
361 fTrackPoints =0;
362 }
363 */
364
365 if (all){
366 for (Int_t i=0;i<200;i++) SetClusterIndex2(i,-3);
367 for (Int_t i=0;i<160;i++) fClusterPointer[i]=0;
368 }
369
370}
371
372
373void AliTPCseed::Modify(Double_t factor)
374{
375
376 //------------------------------------------------------------------
377 //This function makes a track forget its history :)
378 //------------------------------------------------------------------
379 if (factor<=0) {
6c94f330 380 ResetCovariance(10.);
81e97e0d 381 return;
382 }
6c94f330 383 ResetCovariance(factor);
384
81e97e0d 385 SetNumberOfClusters(0);
386 fNFoundable =0;
387 SetChi2(0);
388 fRemoval = 0;
389 fCurrentSigmaY2 = 0.000005;
390 fCurrentSigmaZ2 = 0.000005;
391 fNoCluster = 0;
392 //fFirstPoint = 160;
393 //fLastPoint = 0;
394}
395
396
397
398
399Int_t AliTPCseed::GetProlongation(Double_t xk, Double_t &y, Double_t & z) const
400{
401 //-----------------------------------------------------------------
402 // This function find proloncation of a track to a reference plane x=xk.
403 // doesn't change internal state of the track
404 //-----------------------------------------------------------------
405
6c94f330 406 Double_t x1=GetX(), x2=x1+(xk-x1), dx=x2-x1;
81e97e0d 407
6c94f330 408 if (TMath::Abs(GetSnp()+GetC()*dx) >= AliTPCReconstructor::GetMaxSnpTrack()) {
81e97e0d 409 return 0;
410 }
411
412 // Double_t y1=fP0, z1=fP1;
6c94f330 413 Double_t c1=GetSnp(), r1=sqrt(1.- c1*c1);
414 Double_t c2=c1 + GetC()*dx, r2=sqrt(1.- c2*c2);
81e97e0d 415
6c94f330 416 y = GetY();
417 z = GetZ();
81e97e0d 418 //y += dx*(c1+c2)/(r1+r2);
419 //z += dx*(c1+c2)/(c1*r2 + c2*r1)*fP3;
420
421 Double_t dy = dx*(c1+c2)/(r1+r2);
422 Double_t dz = 0;
423 //
6c94f330 424 Double_t delta = GetC()*dx*(c1+c2)/(c1*r2 + c2*r1);
81e97e0d 425 /*
426 if (TMath::Abs(delta)>0.0001){
427 dz = fP3*TMath::ASin(delta)/fP4;
428 }else{
429 dz = dx*fP3*(c1+c2)/(c1*r2 + c2*r1);
430 }
431 */
432 // dz = fP3*AliTPCFastMath::FastAsin(delta)/fP4;
6c94f330 433 dz = GetTgl()*TMath::ASin(delta)/GetC();
81e97e0d 434 //
435 y+=dy;
436 z+=dz;
437
438
439 return 1;
440}
441
442
443//_____________________________________________________________________________
af32720d 444Double_t AliTPCseed::GetPredictedChi2(const AliCluster *c) const
81e97e0d 445{
446 //-----------------------------------------------------------------
447 // This function calculates a predicted chi2 increment.
448 //-----------------------------------------------------------------
6c94f330 449 Double_t p[2]={c->GetY(), c->GetZ()};
450 Double_t cov[3]={fErrorY2, 0., fErrorZ2};
451 return AliExternalTrackParam::GetPredictedChi2(p,cov);
81e97e0d 452}
453
81e97e0d 454//_________________________________________________________________________________________
455
456
457Int_t AliTPCseed::Compare(const TObject *o) const {
458 //-----------------------------------------------------------------
459 // This function compares tracks according to the sector - for given sector according z
460 //-----------------------------------------------------------------
461 AliTPCseed *t=(AliTPCseed*)o;
6c94f330 462
81e97e0d 463 if (fSort == 0){
464 if (t->fRelativeSector>fRelativeSector) return -1;
465 if (t->fRelativeSector<fRelativeSector) return 1;
466 Double_t z2 = t->GetZ();
467 Double_t z1 = GetZ();
468 if (z2>z1) return 1;
469 if (z2<z1) return -1;
470 return 0;
471 }
472 else {
473 Float_t f2 =1;
6c23ffed 474 f2 = 1-20*TMath::Sqrt(t->GetSigma1Pt2())/(t->OneOverPt()+0.0066);
81e97e0d 475 if (t->fBConstrain) f2=1.2;
476
477 Float_t f1 =1;
6c23ffed 478 f1 = 1-20*TMath::Sqrt(GetSigma1Pt2())/(OneOverPt()+0.0066);
81e97e0d 479
480 if (fBConstrain) f1=1.2;
481
482 if (t->GetNumberOfClusters()*f2 <GetNumberOfClusters()*f1) return -1;
483 else return +1;
484 }
485}
486
487
488
489
490//_____________________________________________________________________________
6c94f330 491Bool_t AliTPCseed::Update(const AliCluster *c, Double_t chisq, Int_t /*index*/)
492{
81e97e0d 493 //-----------------------------------------------------------------
494 // This function associates a cluster with this track.
495 //-----------------------------------------------------------------
6c94f330 496 Double_t p[2]={c->GetY(), c->GetZ()};
497 Double_t cov[3]={fErrorY2, 0., fErrorZ2};
81e97e0d 498
6c94f330 499 if (!AliExternalTrackParam::Update(p,cov)) return kFALSE;
81e97e0d 500
501 Int_t n=GetNumberOfClusters();
502 // fIndex[n]=index;
503 SetNumberOfClusters(n+1);
504 SetChi2(GetChi2()+chisq);
505
6c94f330 506 return kTRUE;
81e97e0d 507}
508
509
510
511//_____________________________________________________________________________
105b1b81 512Float_t AliTPCseed::CookdEdx(Double_t low, Double_t up,Int_t i1, Int_t i2, Bool_t onlyused) {
81e97e0d 513 //-----------------------------------------------------------------
514 // This funtion calculates dE/dX within the "low" and "up" cuts.
515 //-----------------------------------------------------------------
516
517 Float_t amp[200];
518 Float_t angular[200];
519 Float_t weight[200];
520 Int_t index[200];
521 //Int_t nc = 0;
522 // TClonesArray & arr = *fPoints;
523 Float_t meanlog = 100.;
524
525 Float_t mean[4] = {0,0,0,0};
526 Float_t sigma[4] = {1000,1000,1000,1000};
527 Int_t nc[4] = {0,0,0,0};
528 Float_t norm[4] = {1000,1000,1000,1000};
529 //
530 //
531 fNShared =0;
532
533 for (Int_t of =0; of<4; of++){
534 for (Int_t i=of+i1;i<i2;i+=4)
535 {
536 Int_t index = fIndex[i];
537 if (index<0||index&0x8000) continue;
538
539 //AliTPCTrackPoint * point = (AliTPCTrackPoint *) arr.At(i);
540 AliTPCTrackerPoint * point = GetTrackPoint(i);
541 //AliTPCTrackerPoint * pointm = GetTrackPoint(i-1);
542 //AliTPCTrackerPoint * pointp = 0;
543 //if (i<159) pointp = GetTrackPoint(i+1);
544
545 if (point==0) continue;
546 AliTPCclusterMI * cl = fClusterPointer[i];
547 if (cl==0) continue;
548 if (onlyused && (!cl->IsUsed(10))) continue;
549 if (cl->IsUsed(11)) {
550 fNShared++;
551 continue;
552 }
553 Int_t type = cl->GetType();
554 //if (point->fIsShared){
555 // fNShared++;
556 // continue;
557 //}
558 //if (pointm)
559 // if (pointm->fIsShared) continue;
560 //if (pointp)
561 // if (pointp->fIsShared) continue;
562
563 if (type<0) continue;
564 //if (type>10) continue;
565 //if (point->GetErrY()==0) continue;
566 //if (point->GetErrZ()==0) continue;
567
568 //Float_t ddy = (point->GetY()-cl->GetY())/point->GetErrY();
569 //Float_t ddz = (point->GetZ()-cl->GetZ())/point->GetErrZ();
570 //if ((ddy*ddy+ddz*ddz)>10) continue;
571
572
573 // if (point->GetCPoint().GetMax()<5) continue;
574 if (cl->GetMax()<5) continue;
575 Float_t angley = point->GetAngleY();
576 Float_t anglez = point->GetAngleZ();
577
578 Float_t rsigmay2 = point->GetSigmaY();
579 Float_t rsigmaz2 = point->GetSigmaZ();
580 /*
581 Float_t ns = 1.;
582 if (pointm){
583 rsigmay += pointm->GetTPoint().GetSigmaY();
584 rsigmaz += pointm->GetTPoint().GetSigmaZ();
585 ns+=1.;
586 }
587 if (pointp){
588 rsigmay += pointp->GetTPoint().GetSigmaY();
589 rsigmaz += pointp->GetTPoint().GetSigmaZ();
590 ns+=1.;
591 }
592 rsigmay/=ns;
593 rsigmaz/=ns;
594 */
595
596 Float_t rsigma = TMath::Sqrt(rsigmay2*rsigmaz2);
597
598 Float_t ampc = 0; // normalization to the number of electrons
599 if (i>64){
600 // ampc = 1.*point->GetCPoint().GetMax();
601 ampc = 1.*cl->GetMax();
602 //ampc = 1.*point->GetCPoint().GetQ();
603 // AliTPCClusterPoint & p = point->GetCPoint();
604 // Float_t dy = TMath::Abs(Int_t( TMath::Abs(p.GetY()/0.6)) - TMath::Abs(p.GetY()/0.6)+0.5);
605 // Float_t iz = (250.0-TMath::Abs(p.GetZ())+0.11)/0.566;
606 //Float_t dz =
607 // TMath::Abs( Int_t(iz) - iz + 0.5);
608 //ampc *= 1.15*(1-0.3*dy);
609 //ampc *= 1.15*(1-0.3*dz);
610 // Float_t zfactor = (AliTPCReconstructor::GetCtgRange()-0.0004*TMath::Abs(point->GetCPoint().GetZ()));
611 //ampc *=zfactor;
612 }
613 else{
614 //ampc = 1.0*point->GetCPoint().GetMax();
615 ampc = 1.0*cl->GetMax();
616 //ampc = 1.0*point->GetCPoint().GetQ();
617 //AliTPCClusterPoint & p = point->GetCPoint();
618 // Float_t dy = TMath::Abs(Int_t( TMath::Abs(p.GetY()/0.4)) - TMath::Abs(p.GetY()/0.4)+0.5);
619 //Float_t iz = (250.0-TMath::Abs(p.GetZ())+0.11)/0.566;
620 //Float_t dz =
621 // TMath::Abs( Int_t(iz) - iz + 0.5);
622
623 //ampc *= 1.15*(1-0.3*dy);
624 //ampc *= 1.15*(1-0.3*dz);
625 // Float_t zfactor = (1.02-0.000*TMath::Abs(point->GetCPoint().GetZ()));
626 //ampc *=zfactor;
627
628 }
629 ampc *= 2.0; // put mean value to channel 50
630 //ampc *= 0.58; // put mean value to channel 50
631 Float_t w = 1.;
632 // if (type>0) w = 1./(type/2.-0.5);
633 // Float_t z = TMath::Abs(cl->GetZ());
634 if (i<64) {
635 ampc /= 0.6;
636 //ampc /= (1+0.0008*z);
637 } else
638 if (i>128){
639 ampc /=1.5;
640 //ampc /= (1+0.0008*z);
641 }else{
642 //ampc /= (1+0.0008*z);
643 }
644
645 if (type<0) { //amp at the border - lower weight
646 // w*= 2.;
647
648 continue;
649 }
650 if (rsigma>1.5) ampc/=1.3; // if big backround
651 amp[nc[of]] = ampc;
652 angular[nc[of]] = TMath::Sqrt(1.+angley*angley+anglez*anglez);
653 weight[nc[of]] = w;
654 nc[of]++;
655 }
656
657 TMath::Sort(nc[of],amp,index,kFALSE);
658 Float_t sumamp=0;
659 Float_t sumamp2=0;
660 Float_t sumw=0;
661 //meanlog = amp[index[Int_t(nc[of]*0.33)]];
662 meanlog = 50;
663 for (Int_t i=int(nc[of]*low+0.5);i<int(nc[of]*up+0.5);i++){
664 Float_t ampl = amp[index[i]]/angular[index[i]];
665 ampl = meanlog*TMath::Log(1.+ampl/meanlog);
666 //
667 sumw += weight[index[i]];
668 sumamp += weight[index[i]]*ampl;
669 sumamp2 += weight[index[i]]*ampl*ampl;
670 norm[of] += angular[index[i]]*weight[index[i]];
671 }
672 if (sumw<1){
673 SetdEdx(0);
674 }
675 else {
676 norm[of] /= sumw;
677 mean[of] = sumamp/sumw;
678 sigma[of] = sumamp2/sumw-mean[of]*mean[of];
679 if (sigma[of]>0.1)
680 sigma[of] = TMath::Sqrt(sigma[of]);
681 else
682 sigma[of] = 1000;
683
684 mean[of] = (TMath::Exp(mean[of]/meanlog)-1)*meanlog;
685 //mean *=(1-0.02*(sigma/(mean*0.17)-1.));
686 //mean *=(1-0.1*(norm-1.));
687 }
688 }
689
690 Float_t dedx =0;
691 fSdEdx =0;
692 fMAngular =0;
693 // mean[0]*= (1-0.05*(sigma[0]/(0.01+mean[1]*0.18)-1));
694 // mean[1]*= (1-0.05*(sigma[1]/(0.01+mean[0]*0.18)-1));
695
696
697 // dedx = (mean[0]* TMath::Sqrt((1.+nc[0]))+ mean[1]* TMath::Sqrt((1.+nc[1])) )/
698 // ( TMath::Sqrt((1.+nc[0]))+TMath::Sqrt((1.+nc[1])));
699
700 Int_t norm2 = 0;
701 Int_t norm3 = 0;
702 for (Int_t i =0;i<4;i++){
703 if (nc[i]>2&&nc[i]<1000){
704 dedx += mean[i] *nc[i];
705 fSdEdx += sigma[i]*(nc[i]-2);
706 fMAngular += norm[i] *nc[i];
707 norm2 += nc[i];
708 norm3 += nc[i]-2;
709 }
710 fDEDX[i] = mean[i];
711 fSDEDX[i] = sigma[i];
712 fNCDEDX[i]= nc[i];
713 }
714
715 if (norm3>0){
716 dedx /=norm2;
717 fSdEdx /=norm3;
718 fMAngular/=norm2;
719 }
720 else{
721 SetdEdx(0);
105b1b81 722 return 0;
81e97e0d 723 }
724 // Float_t dedx1 =dedx;
725 /*
726 dedx =0;
727 for (Int_t i =0;i<4;i++){
728 if (nc[i]>2&&nc[i]<1000){
729 mean[i] = mean[i]*(1-0.12*(sigma[i]/(fSdEdx)-1.));
730 dedx += mean[i] *nc[i];
731 }
732 fDEDX[i] = mean[i];
733 }
734 dedx /= norm2;
735 */
736
737
738 SetdEdx(dedx);
a2d457f2 739 return dedx;
81e97e0d 740}
741Double_t AliTPCseed::Bethe(Double_t bg){
742 //
743 // This is the Bethe-Bloch function normalised to 1 at the minimum
744 //
745 Double_t bg2=bg*bg;
746 Double_t bethe;
747 if (bg<3.5e1)
748 bethe=(1.+ bg2)/bg2*(log(5940*bg2) - bg2/(1.+ bg2));
749 else // Density effect ( approximately :)
750 bethe=1.15*(1.+ bg2)/bg2*(log(3.5*5940*bg) - bg2/(1.+ bg2));
751 return bethe/11.091;
752}
753
754void AliTPCseed::CookPID()
755{
756 //
757 // cook PID information according dEdx
758 //
759 Double_t fRange = 10.;
760 Double_t fRes = 0.1;
761 Double_t fMIP = 47.;
762 //
763 Int_t ns=AliPID::kSPECIES;
764 Double_t sumr =0;
765 for (Int_t j=0; j<ns; j++) {
766 Double_t mass=AliPID::ParticleMass(j);
6c94f330 767 Double_t mom=GetP();
81e97e0d 768 Double_t dedx=fdEdx/fMIP;
769 Double_t bethe=Bethe(mom/mass);
770 Double_t sigma=fRes*bethe;
771 if (sigma>0.001){
772 if (TMath::Abs(dedx-bethe) > fRange*sigma) {
773 fTPCr[j]=TMath::Exp(-0.5*fRange*fRange)/sigma;
774 sumr+=fTPCr[j];
775 continue;
776 }
777 fTPCr[j]=TMath::Exp(-0.5*(dedx-bethe)*(dedx-bethe)/(sigma*sigma))/sigma;
778 sumr+=fTPCr[j];
779 }
780 else{
781 fTPCr[j]=1.;
782 sumr+=fTPCr[j];
783 }
784 }
785 for (Int_t j=0; j<ns; j++) {
786 fTPCr[j]/=sumr; //normalize
787 }
788}
789
790/*
791void AliTPCseed::CookdEdx2(Double_t low, Double_t up) {
792 //-----------------------------------------------------------------
793 // This funtion calculates dE/dX within the "low" and "up" cuts.
794 //-----------------------------------------------------------------
795
796 Float_t amp[200];
797 Float_t angular[200];
798 Float_t weight[200];
799 Int_t index[200];
800 Bool_t inlimit[200];
801 for (Int_t i=0;i<200;i++) inlimit[i]=kFALSE;
802 for (Int_t i=0;i<200;i++) amp[i]=10000;
803 for (Int_t i=0;i<200;i++) angular[i]= 1;;
804
805
806 //
807 Float_t meanlog = 100.;
808 Int_t indexde[4]={0,64,128,160};
809
810 Float_t amean =0;
811 Float_t asigma =0;
812 Float_t anc =0;
813 Float_t anorm =0;
814
815 Float_t mean[4] = {0,0,0,0};
816 Float_t sigma[4] = {1000,1000,1000,1000};
817 Int_t nc[4] = {0,0,0,0};
818 Float_t norm[4] = {1000,1000,1000,1000};
819 //
820 //
821 fNShared =0;
822
823 // for (Int_t of =0; of<3; of++){
824 // for (Int_t i=indexde[of];i<indexde[of+1];i++)
825 for (Int_t i =0; i<160;i++)
826 {
827 AliTPCTrackPoint * point = GetTrackPoint(i);
828 if (point==0) continue;
829 if (point->fIsShared){
830 fNShared++;
831 continue;
832 }
833 Int_t type = point->GetCPoint().GetType();
834 if (type<0) continue;
835 if (point->GetCPoint().GetMax()<5) continue;
836 Float_t angley = point->GetTPoint().GetAngleY();
837 Float_t anglez = point->GetTPoint().GetAngleZ();
838 Float_t rsigmay = point->GetCPoint().GetSigmaY();
839 Float_t rsigmaz = point->GetCPoint().GetSigmaZ();
840 Float_t rsigma = TMath::Sqrt(rsigmay*rsigmaz);
841
842 Float_t ampc = 0; // normalization to the number of electrons
843 if (i>64){
844 ampc = point->GetCPoint().GetMax();
845 }
846 else{
847 ampc = point->GetCPoint().GetMax();
848 }
849 ampc *= 2.0; // put mean value to channel 50
850 // ampc *= 0.565; // put mean value to channel 50
851
852 Float_t w = 1.;
853 Float_t z = TMath::Abs(point->GetCPoint().GetZ());
854 if (i<64) {
855 ampc /= 0.63;
856 } else
857 if (i>128){
858 ampc /=1.51;
859 }
860 if (type<0) { //amp at the border - lower weight
861 continue;
862 }
863 if (rsigma>1.5) ampc/=1.3; // if big backround
864 angular[i] = TMath::Sqrt(1.+angley*angley+anglez*anglez);
865 amp[i] = ampc/angular[i];
866 weight[i] = w;
867 anc++;
868 }
869
870 TMath::Sort(159,amp,index,kFALSE);
871 for (Int_t i=int(anc*low+0.5);i<int(anc*up+0.5);i++){
872 inlimit[index[i]] = kTRUE; // take all clusters
873 }
874
875 // meanlog = amp[index[Int_t(anc*0.3)]];
876 meanlog =10000.;
877 for (Int_t of =0; of<3; of++){
878 Float_t sumamp=0;
879 Float_t sumamp2=0;
880 Float_t sumw=0;
881 for (Int_t i=indexde[of];i<indexde[of+1];i++)
882 {
883 if (inlimit[i]==kFALSE) continue;
884 Float_t ampl = amp[i];
885 ///angular[i];
886 ampl = meanlog*TMath::Log(1.+ampl/meanlog);
887 //
888 sumw += weight[i];
889 sumamp += weight[i]*ampl;
890 sumamp2 += weight[i]*ampl*ampl;
891 norm[of] += angular[i]*weight[i];
892 nc[of]++;
893 }
894 if (sumw<1){
895 SetdEdx(0);
896 }
897 else {
898 norm[of] /= sumw;
899 mean[of] = sumamp/sumw;
900 sigma[of] = sumamp2/sumw-mean[of]*mean[of];
901 if (sigma[of]>0.1)
902 sigma[of] = TMath::Sqrt(sigma[of]);
903 else
904 sigma[of] = 1000;
905 mean[of] = (TMath::Exp(mean[of]/meanlog)-1)*meanlog;
906 }
907 }
908
909 Float_t dedx =0;
910 fSdEdx =0;
911 fMAngular =0;
912 //
913 Int_t norm2 = 0;
914 Int_t norm3 = 0;
915 Float_t www[3] = {12.,14.,17.};
916 //Float_t www[3] = {1.,1.,1.};
917
918 for (Int_t i =0;i<3;i++){
919 if (nc[i]>2&&nc[i]<1000){
920 dedx += mean[i] *nc[i]*www[i]/sigma[i];
921 fSdEdx += sigma[i]*(nc[i]-2)*www[i]/sigma[i];
922 fMAngular += norm[i] *nc[i];
923 norm2 += nc[i]*www[i]/sigma[i];
924 norm3 += (nc[i]-2)*www[i]/sigma[i];
925 }
926 fDEDX[i] = mean[i];
927 fSDEDX[i] = sigma[i];
928 fNCDEDX[i]= nc[i];
929 }
930
931 if (norm3>0){
932 dedx /=norm2;
933 fSdEdx /=norm3;
934 fMAngular/=norm2;
935 }
936 else{
937 SetdEdx(0);
938 return;
939 }
940 // Float_t dedx1 =dedx;
941
942 dedx =0;
943 Float_t norm4 = 0;
944 for (Int_t i =0;i<3;i++){
945 if (nc[i]>2&&nc[i]<1000&&sigma[i]>3){
946 //mean[i] = mean[i]*(1+0.08*(sigma[i]/(fSdEdx)-1.));
947 dedx += mean[i] *(nc[i])/(sigma[i]);
948 norm4 += (nc[i])/(sigma[i]);
949 }
950 fDEDX[i] = mean[i];
951 }
952 if (norm4>0) dedx /= norm4;
953
954
955
956 SetdEdx(dedx);
957
958 //mi deDX
959
960}
961*/
6c94f330 962Double_t AliTPCseed::GetYat(Double_t xk) const {
963//-----------------------------------------------------------------
964// This function calculates the Y-coordinate of a track at the plane x=xk.
965//-----------------------------------------------------------------
966 if (TMath::Abs(GetSnp())>AliTPCReconstructor::GetMaxSnpTrack()) return 0.; //patch 01 jan 06
967 Double_t c1=GetSnp(), r1=TMath::Sqrt(1.- c1*c1);
968 Double_t c2=c1+GetC()*(xk-GetX());
969 if (TMath::Abs(c2)>AliTPCReconstructor::GetMaxSnpTrack()) return 0;
970 Double_t r2=TMath::Sqrt(1.- c2*c2);
971 return GetY() + (xk-GetX())*(c1+c2)/(r1+r2);
972}
973
19b00333 974void AliTPCseed::SetClusterMapBit(int ibit, Bool_t state)
975{
976 fClusterMap[ibit] = state;
977}
978Bool_t AliTPCseed::GetClusterMapBit(int ibit)
979{
980 return fClusterMap[ibit];
981}
982void AliTPCseed::SetSharedMapBit(int ibit, Bool_t state)
983{
984 fSharedMap[ibit] = state;
985}
986Bool_t AliTPCseed::GetSharedMapBit(int ibit)
987{
988 return fSharedMap[ibit];
989}