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updated configuration of GlobalHisto component
[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//-----------------------------------------------------------------
28273e26 20//
81e97e0d 21// Implementation of the TPC seed class
22// This class is used by the AliTPCtrackerMI class
23// Origin: Marian Ivanov, CERN, Marian.Ivanov@cern.ch
24//-----------------------------------------------------------------
25#include "TClonesArray.h"
2efc897f 26#include "TGraphErrors.h"
81e97e0d 27#include "AliTPCseed.h"
3f82c4f2 28#include "AliTPCReconstructor.h"
0a65832b 29#include "AliTPCClusterParam.h"
7cd8ac3f 30#include "AliTPCCalPad.h"
31#include "AliTPCCalROC.h"
37540068 32#include "AliTPCcalibDB.h"
d080e4a4 33#include "AliTPCParam.h"
5731b051 34#include "AliMathBase.h"
3af3fbc4 35#include "AliTPCTransform.h"
36#include "AliSplineFit.h"
37#include "AliCDBManager.h"
108a67db 38#include "AliTPCcalibDButil.h"
7cd8ac3f 39
81e97e0d 40
41ClassImp(AliTPCseed)
42
43
44
32fab534 45AliTPCseed::AliTPCseed():
46 AliTPCtrack(),
47 fEsd(0x0),
2928bdf0 48 fClusterOwner(kFALSE),
32fab534 49 fRow(0),
50 fSector(-1),
51 fRelativeSector(-1),
52 fCurrentSigmaY2(1e10),
53 fCurrentSigmaZ2(1e10),
e0e13b88 54 fCMeanSigmaY2p30(-1.), //! current mean sigma Y2 - mean30%
55 fCMeanSigmaZ2p30(-1.), //! current mean sigma Z2 - mean30%
c07cb486 56 fCMeanSigmaY2p30R(-1.), //! current mean sigma Y2 - mean2%
57 fCMeanSigmaZ2p30R(-1.), //! current mean sigma Z2 - mean2%
e0e13b88 58 //
32fab534 59 fErrorY2(1e10),
60 fErrorZ2(1e10),
61 fCurrentCluster(0x0),
62 fCurrentClusterIndex1(-1),
63 fInDead(kFALSE),
64 fIsSeeding(kFALSE),
65 fNoCluster(0),
66 fSort(0),
67 fBSigned(kFALSE),
68 fSeedType(0),
69 fSeed1(-1),
70 fSeed2(-1),
71 fMAngular(0),
bad6eb00 72 fCircular(0)
32fab534 73{
81e97e0d 74 //
5c09947e 75 for (Int_t i=0;i<160;i++) SetClusterIndex2(i,-3);
81e97e0d 76 for (Int_t i=0;i<160;i++) fClusterPointer[i]=0;
77 for (Int_t i=0;i<3;i++) fKinkIndexes[i]=0;
32fab534 78 for (Int_t i=0;i<AliPID::kSPECIES;i++) fTPCr[i]=0.2;
79 for (Int_t i=0;i<4;i++) {
80 fDEDX[i] = 0.;
81 fSDEDX[i] = 1e10;
82 fNCDEDX[i] = 0;
83 }
84 for (Int_t i=0;i<12;i++) fOverlapLabels[i] = -1;
81e97e0d 85}
32fab534 86
2928bdf0 87AliTPCseed::AliTPCseed(const AliTPCseed &s, Bool_t clusterOwner):
32fab534 88 AliTPCtrack(s),
89 fEsd(0x0),
2928bdf0 90 fClusterOwner(clusterOwner),
32fab534 91 fRow(0),
92 fSector(-1),
93 fRelativeSector(-1),
c07cb486 94 fCurrentSigmaY2(-1),
95 fCurrentSigmaZ2(-1),
e0e13b88 96 fCMeanSigmaY2p30(-1.), //! current mean sigma Y2 - mean30%
97 fCMeanSigmaZ2p30(-1.), //! current mean sigma Z2 - mean30%
c07cb486 98 fCMeanSigmaY2p30R(-1.), //! current mean sigma Y2 - mean2%
99 fCMeanSigmaZ2p30R(-1.), //! current mean sigma Z2 - mean2%
32fab534 100 fErrorY2(1e10),
101 fErrorZ2(1e10),
102 fCurrentCluster(0x0),
103 fCurrentClusterIndex1(-1),
104 fInDead(kFALSE),
105 fIsSeeding(kFALSE),
106 fNoCluster(0),
107 fSort(0),
108 fBSigned(kFALSE),
109 fSeedType(0),
110 fSeed1(-1),
111 fSeed2(-1),
112 fMAngular(0),
bad6eb00 113 fCircular(0)
32fab534 114{
81e97e0d 115 //---------------------
116 // dummy copy constructor
117 //-------------------------
2928bdf0 118 for (Int_t i=0;i<160;i++) {
119 fClusterPointer[i]=0;
120 if (fClusterOwner){
121 if (s.fClusterPointer[i])
122 fClusterPointer[i] = new AliTPCclusterMI(*(s.fClusterPointer[i]));
123 }else{
124 fClusterPointer[i] = s.fClusterPointer[i];
125 }
126 fTrackPoints[i] = s.fTrackPoints[i];
127 }
81e97e0d 128 for (Int_t i=0;i<160;i++) fIndex[i] = s.fIndex[i];
5c09947e 129 for (Int_t i=0;i<AliPID::kSPECIES;i++) fTPCr[i]=s.fTPCr[i];
130 for (Int_t i=0;i<4;i++) {
131 fDEDX[i] = s.fDEDX[i];
132 fSDEDX[i] = s.fSDEDX[i];
133 fNCDEDX[i] = s.fNCDEDX[i];
134 }
135 for (Int_t i=0;i<12;i++) fOverlapLabels[i] = s.fOverlapLabels[i];
19b00333 136
81e97e0d 137}
5c09947e 138
139
32fab534 140AliTPCseed::AliTPCseed(const AliTPCtrack &t):
141 AliTPCtrack(t),
142 fEsd(0x0),
2928bdf0 143 fClusterOwner(kFALSE),
32fab534 144 fRow(0),
145 fSector(-1),
146 fRelativeSector(-1),
c07cb486 147 fCurrentSigmaY2(-1),
148 fCurrentSigmaZ2(-1),
e0e13b88 149 fCMeanSigmaY2p30(-1.), //! current mean sigma Y2 - mean30%
150 fCMeanSigmaZ2p30(-1.), //! current mean sigma Z2 - mean30%
c07cb486 151 fCMeanSigmaY2p30R(-1.), //! current mean sigma Y2 - mean2%
152 fCMeanSigmaZ2p30R(-1.), //! current mean sigma Z2 - mean2%
32fab534 153 fErrorY2(1e10),
154 fErrorZ2(1e10),
155 fCurrentCluster(0x0),
156 fCurrentClusterIndex1(-1),
157 fInDead(kFALSE),
158 fIsSeeding(kFALSE),
159 fNoCluster(0),
160 fSort(0),
161 fBSigned(kFALSE),
162 fSeedType(0),
163 fSeed1(-1),
164 fSeed2(-1),
165 fMAngular(0),
bad6eb00 166 fCircular(0)
32fab534 167{
81e97e0d 168 //
32fab534 169 // Constructor from AliTPCtrack
170 //
171 fFirstPoint =0;
105b1b81 172 for (Int_t i=0;i<5;i++) fTPCr[i]=0.2;
81e97e0d 173 for (Int_t i=0;i<160;i++) {
174 fClusterPointer[i] = 0;
175 Int_t index = t.GetClusterIndex(i);
176 if (index>=-1){
177 SetClusterIndex2(i,index);
178 }
179 else{
180 SetClusterIndex2(i,-3);
181 }
182 }
32fab534 183 for (Int_t i=0;i<4;i++) {
184 fDEDX[i] = 0.;
185 fSDEDX[i] = 1e10;
186 fNCDEDX[i] = 0;
187 }
188 for (Int_t i=0;i<12;i++) fOverlapLabels[i] = -1;
81e97e0d 189}
190
6c94f330 191AliTPCseed::AliTPCseed(Double_t xr, Double_t alpha, const Double_t xx[5],
192 const Double_t cc[15], Int_t index):
193 AliTPCtrack(xr, alpha, xx, cc, index),
32fab534 194 fEsd(0x0),
2928bdf0 195 fClusterOwner(kFALSE),
32fab534 196 fRow(0),
197 fSector(-1),
198 fRelativeSector(-1),
c07cb486 199 fCurrentSigmaY2(-1),
200 fCurrentSigmaZ2(-1),
e0e13b88 201 fCMeanSigmaY2p30(-1.), //! current mean sigma Y2 - mean30%
202 fCMeanSigmaZ2p30(-1.), //! current mean sigma Z2 - mean30%
c07cb486 203 fCMeanSigmaY2p30R(-1.), //! current mean sigma Y2 - mean2%
204 fCMeanSigmaZ2p30R(-1.), //! current mean sigma Z2 - mean2%
32fab534 205 fErrorY2(1e10),
206 fErrorZ2(1e10),
207 fCurrentCluster(0x0),
208 fCurrentClusterIndex1(-1),
209 fInDead(kFALSE),
210 fIsSeeding(kFALSE),
211 fNoCluster(0),
212 fSort(0),
213 fBSigned(kFALSE),
214 fSeedType(0),
215 fSeed1(-1),
216 fSeed2(-1),
217 fMAngular(0),
bad6eb00 218 fCircular(0)
32fab534 219{
220 //
221 // Constructor
81e97e0d 222 //
32fab534 223 fFirstPoint =0;
5c09947e 224 for (Int_t i=0;i<160;i++) SetClusterIndex2(i,-3);
81e97e0d 225 for (Int_t i=0;i<160;i++) fClusterPointer[i]=0;
81e97e0d 226 for (Int_t i=0;i<5;i++) fTPCr[i]=0.2;
32fab534 227 for (Int_t i=0;i<4;i++) {
228 fDEDX[i] = 0.;
229 fSDEDX[i] = 1e10;
230 fNCDEDX[i] = 0;
231 }
232 for (Int_t i=0;i<12;i++) fOverlapLabels[i] = -1;
81e97e0d 233}
234
235AliTPCseed::~AliTPCseed(){
236 //
237 // destructor
81e97e0d 238 fNoCluster =0;
2928bdf0 239 if (fClusterOwner){
240 for (Int_t icluster=0; icluster<160; icluster++){
241 delete fClusterPointer[icluster];
242 }
243 }
bfb57b6c 244
81e97e0d 245}
179c6296 246//_________________________________________________
316c6cd9 247AliTPCseed & AliTPCseed::operator=(const AliTPCseed &param)
179c6296 248{
249 //
316c6cd9 250 // assignment operator
179c6296 251 //
316c6cd9 252 if(this!=&param){
253 AliTPCtrack::operator=(param);
254 fEsd =param.fEsd;
255 for(Int_t i = 0;i<160;++i)fClusterPointer[i] = param.fClusterPointer[i]; // this is not allocated by AliTPCSeed
256 fClusterOwner = param.fClusterOwner;
257 // leave out fPoint, they are also not copied in the copy ctor...
258 // but deleted in the dtor... strange...
316c6cd9 259 fRow = param.fRow;
260 fSector = param.fSector;
261 fRelativeSector = param.fRelativeSector;
262 fCurrentSigmaY2 = param.fCurrentSigmaY2;
263 fCurrentSigmaZ2 = param.fCurrentSigmaZ2;
264 fErrorY2 = param.fErrorY2;
265 fErrorZ2 = param.fErrorZ2;
266 fCurrentCluster = param.fCurrentCluster; // this is not allocated by AliTPCSeed
267 fCurrentClusterIndex1 = param.fCurrentClusterIndex1;
268 fInDead = param.fInDead;
269 fIsSeeding = param.fIsSeeding;
270 fNoCluster = param.fNoCluster;
271 fSort = param.fSort;
272 fBSigned = param.fBSigned;
273 for(Int_t i = 0;i<4;++i){
274 fDEDX[i] = param.fDEDX[i];
275 fSDEDX[i] = param.fSDEDX[i];
276 fNCDEDX[i] = param.fNCDEDX[i];
277 }
278 for(Int_t i = 0;i<AliPID::kSPECIES;++i)fTPCr[i] = param.fTPCr[i];
279
280 fSeedType = param.fSeedType;
281 fSeed1 = param.fSeed1;
282 fSeed2 = param.fSeed2;
283 for(Int_t i = 0;i<12;++i)fOverlapLabels[i] = param.fOverlapLabels[i];
284 fMAngular = param.fMAngular;
285 fCircular = param.fCircular;
286 for(int i = 0;i<160;++i)fTrackPoints[i] = param.fTrackPoints[i];
316c6cd9 287 }
179c6296 288 return (*this);
289}
290//____________________________________________________
81e97e0d 291AliTPCTrackerPoint * AliTPCseed::GetTrackPoint(Int_t i)
292{
293 //
294 //
295 return &fTrackPoints[i];
296}
297
81e97e0d 298
299
300Double_t AliTPCseed::GetDensityFirst(Int_t n)
301{
302 //
303 //
304 // return cluster for n rows bellow first point
305 Int_t nfoundable = 1;
306 Int_t nfound = 1;
307 for (Int_t i=fLastPoint-1;i>0&&nfoundable<n; i--){
308 Int_t index = GetClusterIndex2(i);
309 if (index!=-1) nfoundable++;
310 if (index>0) nfound++;
311 }
312 if (nfoundable<n) return 0;
313 return Double_t(nfound)/Double_t(nfoundable);
314
315}
316
317
318void AliTPCseed::GetClusterStatistic(Int_t first, Int_t last, Int_t &found, Int_t &foundable, Int_t &shared, Bool_t plus2)
319{
320 // get cluster stat. on given region
321 //
322 found = 0;
323 foundable = 0;
324 shared =0;
325 for (Int_t i=first;i<last; i++){
326 Int_t index = GetClusterIndex2(i);
327 if (index!=-1) foundable++;
6d493ea0 328 if (index&0x8000) continue;
81e97e0d 329 if (fClusterPointer[i]) {
330 found++;
331 }
332 else
333 continue;
334
335 if (fClusterPointer[i]->IsUsed(10)) {
336 shared++;
337 continue;
338 }
339 if (!plus2) continue; //take also neighborhoud
340 //
341 if ( (i>0) && fClusterPointer[i-1]){
342 if (fClusterPointer[i-1]->IsUsed(10)) {
343 shared++;
344 continue;
345 }
346 }
347 if ( fClusterPointer[i+1]){
348 if (fClusterPointer[i+1]->IsUsed(10)) {
349 shared++;
350 continue;
351 }
352 }
353
354 }
355 //if (shared>found){
356 //Error("AliTPCseed::GetClusterStatistic","problem\n");
357 //}
358}
359
360
361
362
363
364void AliTPCseed::Reset(Bool_t all)
365{
366 //
367 //
368 SetNumberOfClusters(0);
369 fNFoundable = 0;
370 SetChi2(0);
6c94f330 371 ResetCovariance(10.);
81e97e0d 372 /*
373 if (fTrackPoints){
374 for (Int_t i=0;i<8;i++){
375 delete [] fTrackPoints[i];
376 }
377 delete fTrackPoints;
378 fTrackPoints =0;
379 }
380 */
381
382 if (all){
383 for (Int_t i=0;i<200;i++) SetClusterIndex2(i,-3);
384 for (Int_t i=0;i<160;i++) fClusterPointer[i]=0;
385 }
386
387}
388
389
390void AliTPCseed::Modify(Double_t factor)
391{
392
393 //------------------------------------------------------------------
394 //This function makes a track forget its history :)
395 //------------------------------------------------------------------
396 if (factor<=0) {
6c94f330 397 ResetCovariance(10.);
81e97e0d 398 return;
399 }
6c94f330 400 ResetCovariance(factor);
401
81e97e0d 402 SetNumberOfClusters(0);
403 fNFoundable =0;
404 SetChi2(0);
405 fRemoval = 0;
406 fCurrentSigmaY2 = 0.000005;
407 fCurrentSigmaZ2 = 0.000005;
408 fNoCluster = 0;
409 //fFirstPoint = 160;
410 //fLastPoint = 0;
411}
412
413
414
415
416Int_t AliTPCseed::GetProlongation(Double_t xk, Double_t &y, Double_t & z) const
417{
418 //-----------------------------------------------------------------
419 // This function find proloncation of a track to a reference plane x=xk.
420 // doesn't change internal state of the track
421 //-----------------------------------------------------------------
422
6c94f330 423 Double_t x1=GetX(), x2=x1+(xk-x1), dx=x2-x1;
81e97e0d 424
6c94f330 425 if (TMath::Abs(GetSnp()+GetC()*dx) >= AliTPCReconstructor::GetMaxSnpTrack()) {
81e97e0d 426 return 0;
427 }
428
429 // Double_t y1=fP0, z1=fP1;
60e55aee 430 Double_t c1=GetSnp(), r1=sqrt((1.-c1)*(1.+c1));
431 Double_t c2=c1 + GetC()*dx, r2=sqrt((1.-c2)*(1.+c2));
81e97e0d 432
6c94f330 433 y = GetY();
434 z = GetZ();
81e97e0d 435 //y += dx*(c1+c2)/(r1+r2);
436 //z += dx*(c1+c2)/(c1*r2 + c2*r1)*fP3;
437
438 Double_t dy = dx*(c1+c2)/(r1+r2);
439 Double_t dz = 0;
440 //
6c94f330 441 Double_t delta = GetC()*dx*(c1+c2)/(c1*r2 + c2*r1);
81e97e0d 442 /*
443 if (TMath::Abs(delta)>0.0001){
444 dz = fP3*TMath::ASin(delta)/fP4;
445 }else{
446 dz = dx*fP3*(c1+c2)/(c1*r2 + c2*r1);
447 }
448 */
449 // dz = fP3*AliTPCFastMath::FastAsin(delta)/fP4;
6c94f330 450 dz = GetTgl()*TMath::ASin(delta)/GetC();
81e97e0d 451 //
452 y+=dy;
453 z+=dz;
454
455
456 return 1;
457}
458
459
460//_____________________________________________________________________________
af32720d 461Double_t AliTPCseed::GetPredictedChi2(const AliCluster *c) const
81e97e0d 462{
463 //-----------------------------------------------------------------
464 // This function calculates a predicted chi2 increment.
465 //-----------------------------------------------------------------
6c94f330 466 Double_t p[2]={c->GetY(), c->GetZ()};
467 Double_t cov[3]={fErrorY2, 0., fErrorZ2};
9c7b8249 468
469 Float_t dx = ((AliTPCclusterMI*)c)->GetX()-GetX();
470 if (TMath::Abs(dx)>0){
471 Float_t ty = TMath::Tan(TMath::ASin(GetSnp()));
472 Float_t dy = dx*ty;
473 Float_t dz = dx*TMath::Sqrt(1.+ty*ty)*GetTgl();
474 p[0] = c->GetY()-dy;
475 p[1] = c->GetZ()-dz;
476 }
6c94f330 477 return AliExternalTrackParam::GetPredictedChi2(p,cov);
81e97e0d 478}
479
81e97e0d 480//_________________________________________________________________________________________
481
482
483Int_t AliTPCseed::Compare(const TObject *o) const {
484 //-----------------------------------------------------------------
485 // This function compares tracks according to the sector - for given sector according z
486 //-----------------------------------------------------------------
487 AliTPCseed *t=(AliTPCseed*)o;
6c94f330 488
81e97e0d 489 if (fSort == 0){
490 if (t->fRelativeSector>fRelativeSector) return -1;
491 if (t->fRelativeSector<fRelativeSector) return 1;
492 Double_t z2 = t->GetZ();
493 Double_t z1 = GetZ();
494 if (z2>z1) return 1;
495 if (z2<z1) return -1;
496 return 0;
497 }
498 else {
499 Float_t f2 =1;
6c23ffed 500 f2 = 1-20*TMath::Sqrt(t->GetSigma1Pt2())/(t->OneOverPt()+0.0066);
81e97e0d 501 if (t->fBConstrain) f2=1.2;
502
503 Float_t f1 =1;
6c23ffed 504 f1 = 1-20*TMath::Sqrt(GetSigma1Pt2())/(OneOverPt()+0.0066);
81e97e0d 505
506 if (fBConstrain) f1=1.2;
507
508 if (t->GetNumberOfClusters()*f2 <GetNumberOfClusters()*f1) return -1;
509 else return +1;
510 }
511}
512
513
514
515
516//_____________________________________________________________________________
70e20dcf 517Bool_t AliTPCseed::Update(const AliCluster *c, Double_t chisq, Int_t index)
6c94f330 518{
81e97e0d 519 //-----------------------------------------------------------------
520 // This function associates a cluster with this track.
521 //-----------------------------------------------------------------
81e97e0d 522 Int_t n=GetNumberOfClusters();
70e20dcf 523 Int_t idx=GetClusterIndex(n); // save the current cluster index
524
525 AliCluster cl(*c); cl.SetSigmaY2(fErrorY2); cl.SetSigmaZ2(fErrorZ2);
ca521f6c 526 Float_t dx = ((AliTPCclusterMI*)c)->GetX()-GetX();
527 if (TMath::Abs(dx)>0){
528 Float_t ty = TMath::Tan(TMath::ASin(GetSnp()));
529 Float_t dy = dx*ty;
530 Float_t dz = dx*TMath::Sqrt(1.+ty*ty)*GetTgl();
531 cl.SetY(c->GetY()-dy);
532 cl.SetZ(c->GetZ()-dz);
533 }
534
70e20dcf 535 if (!AliTPCtrack::Update(&cl,chisq,index)) return kFALSE;
e0e13b88 536
537 if (fCMeanSigmaY2p30<0){
538 fCMeanSigmaY2p30= c->GetSigmaY2(); //! current mean sigma Y2 - mean30%
c07cb486 539 fCMeanSigmaZ2p30= c->GetSigmaZ2(); //! current mean sigma Z2 - mean30%
540 fCMeanSigmaY2p30R = 1; //! current mean sigma Y2 - mean5%
541 fCMeanSigmaZ2p30R = 1; //! current mean sigma Z2 - mean5%
e0e13b88 542 }
543 //
544 fCMeanSigmaY2p30= 0.70*fCMeanSigmaY2p30 +0.30*c->GetSigmaY2();
c07cb486 545 fCMeanSigmaZ2p30= 0.70*fCMeanSigmaZ2p30 +0.30*c->GetSigmaZ2();
546 if (fCurrentSigmaY2>0){
547 fCMeanSigmaY2p30R = 0.7*fCMeanSigmaY2p30R +0.3*c->GetSigmaY2()/fCurrentSigmaY2;
548 fCMeanSigmaZ2p30R = 0.7*fCMeanSigmaZ2p30R +0.3*c->GetSigmaZ2()/fCurrentSigmaZ2;
549 }
e0e13b88 550
81e97e0d 551
70e20dcf 552 SetClusterIndex(n,idx); // restore the current cluster index
6c94f330 553 return kTRUE;
81e97e0d 554}
555
556
557
558//_____________________________________________________________________________
dc5cd41c 559Float_t AliTPCseed::CookdEdx(Double_t low, Double_t up,Int_t i1, Int_t i2, Bool_t /* onlyused */) {
81e97e0d 560 //-----------------------------------------------------------------
561 // This funtion calculates dE/dX within the "low" and "up" cuts.
562 //-----------------------------------------------------------------
2cadb5d1 563 // CookdEdxAnalytical(Double_t low, Double_t up, Int_t type, Int_t i1, Int_t i2, Int_t returnVal)
83afd539 564 AliTPCParam *param = AliTPCcalibDB::Instance()->GetParameters();
44a6a09e 565
83afd539 566 Int_t row0 = param->GetNRowLow();
567 Int_t row1 = row0+param->GetNRowUp1();
568 Int_t row2 = row1+param->GetNRowUp2();
44a6a09e 569 const AliTPCRecoParam * recoParam = AliTPCcalibDB::Instance()->GetTransform()->GetCurrentRecoParam();
570 Int_t useTot = 0;
571 if (recoParam) useTot = (recoParam->GetUseTotCharge())? 0:1;
83afd539 572 //
573 //
574 //
2cadb5d1 575 fDEDX[0] = CookdEdxAnalytical(low,up,useTot ,i1 ,i2, 0);
576 fDEDX[1] = CookdEdxAnalytical(low,up,useTot ,0 ,row0, 0);
577 fDEDX[2] = CookdEdxAnalytical(low,up,useTot ,row0,row1, 0);
578 fDEDX[3] = CookdEdxAnalytical(low,up,useTot ,row1,row2, 0);
64bf5ca0 579 fDEDX[4] = CookdEdxAnalytical(low,up,useTot ,row0,row2, 0); // full OROC truncated mean
83afd539 580 //
2cadb5d1 581 fSDEDX[0] = CookdEdxAnalytical(low,up,useTot ,i1 ,i2, 1);
582 fSDEDX[1] = CookdEdxAnalytical(low,up,useTot ,0 ,row0, 1);
583 fSDEDX[2] = CookdEdxAnalytical(low,up,useTot ,row0,row1, 1);
584 fSDEDX[3] = CookdEdxAnalytical(low,up,useTot ,row1,row2, 1);
83afd539 585 //
64bf5ca0 586 fNCDEDX[0] = TMath::Nint(GetTPCClustInfo(2, 1, i1 , i2));
587 fNCDEDX[1] = TMath::Nint(GetTPCClustInfo(2, 1, 0 , row0));
588 fNCDEDX[2] = TMath::Nint(GetTPCClustInfo(2, 1, row0, row1));
589 fNCDEDX[3] = TMath::Nint(GetTPCClustInfo(2, 1, row1, row2));
590 //
591 fNCDEDXInclThres[0] = TMath::Nint(GetTPCClustInfo(2, 2, i1 , i2));
592 fNCDEDXInclThres[1] = TMath::Nint(GetTPCClustInfo(2, 2, 0 , row0));
593 fNCDEDXInclThres[2] = TMath::Nint(GetTPCClustInfo(2, 2, row0, row1));
594 fNCDEDXInclThres[3] = TMath::Nint(GetTPCClustInfo(2, 2, row1, row2));
595 //
83afd539 596 SetdEdx(fDEDX[0]);
597 return fDEDX[0];
81e97e0d 598
ba5e52fb 599// return CookdEdxNorm(low,up,0,i1,i2,1,0,2);
4cc7ba77 600
601
ba5e52fb 602// Float_t amp[200];
603// Float_t angular[200];
604// Float_t weight[200];
605// Int_t index[200];
606// //Int_t nc = 0;
607// Float_t meanlog = 100.;
608
609// Float_t mean[4] = {0,0,0,0};
610// Float_t sigma[4] = {1000,1000,1000,1000};
611// Int_t nc[4] = {0,0,0,0};
612// Float_t norm[4] = {1000,1000,1000,1000};
613// //
614// //
615// fNShared =0;
616
617// Float_t gainGG = 1;
618// if (AliTPCcalibDB::Instance()->GetParameters()){
619// gainGG= AliTPCcalibDB::Instance()->GetParameters()->GetGasGain()/20000.; //relative gas gain
620// }
621
622
623// for (Int_t of =0; of<4; of++){
624// for (Int_t i=of+i1;i<i2;i+=4)
625// {
626// Int_t clindex = fIndex[i];
627// if (clindex<0||clindex&0x8000) continue;
628
629// //AliTPCTrackPoint * point = (AliTPCTrackPoint *) arr.At(i);
630// AliTPCTrackerPoint * point = GetTrackPoint(i);
631// //AliTPCTrackerPoint * pointm = GetTrackPoint(i-1);
632// //AliTPCTrackerPoint * pointp = 0;
633// //if (i<159) pointp = GetTrackPoint(i+1);
634
635// if (point==0) continue;
636// AliTPCclusterMI * cl = fClusterPointer[i];
637// if (cl==0) continue;
638// if (onlyused && (!cl->IsUsed(10))) continue;
639// if (cl->IsUsed(11)) {
640// fNShared++;
641// continue;
642// }
643// Int_t type = cl->GetType();
644// //if (point->fIsShared){
645// // fNShared++;
646// // continue;
647// //}
648// //if (pointm)
649// // if (pointm->fIsShared) continue;
650// //if (pointp)
651// // if (pointp->fIsShared) continue;
652
653// if (type<0) continue;
654// //if (type>10) continue;
655// //if (point->GetErrY()==0) continue;
656// //if (point->GetErrZ()==0) continue;
657
658// //Float_t ddy = (point->GetY()-cl->GetY())/point->GetErrY();
659// //Float_t ddz = (point->GetZ()-cl->GetZ())/point->GetErrZ();
660// //if ((ddy*ddy+ddz*ddz)>10) continue;
661
662
663// // if (point->GetCPoint().GetMax()<5) continue;
664// if (cl->GetMax()<5) continue;
665// Float_t angley = point->GetAngleY();
666// Float_t anglez = point->GetAngleZ();
667
668// Float_t rsigmay2 = point->GetSigmaY();
669// Float_t rsigmaz2 = point->GetSigmaZ();
670// /*
671// Float_t ns = 1.;
672// if (pointm){
673// rsigmay += pointm->GetTPoint().GetSigmaY();
674// rsigmaz += pointm->GetTPoint().GetSigmaZ();
675// ns+=1.;
676// }
677// if (pointp){
678// rsigmay += pointp->GetTPoint().GetSigmaY();
679// rsigmaz += pointp->GetTPoint().GetSigmaZ();
680// ns+=1.;
681// }
682// rsigmay/=ns;
683// rsigmaz/=ns;
684// */
685
686// Float_t rsigma = TMath::Sqrt(rsigmay2*rsigmaz2);
687
688// Float_t ampc = 0; // normalization to the number of electrons
689// if (i>64){
690// // ampc = 1.*point->GetCPoint().GetMax();
691// ampc = 1.*cl->GetMax();
692// //ampc = 1.*point->GetCPoint().GetQ();
693// // AliTPCClusterPoint & p = point->GetCPoint();
694// // Float_t dy = TMath::Abs(Int_t( TMath::Abs(p.GetY()/0.6)) - TMath::Abs(p.GetY()/0.6)+0.5);
695// // Float_t iz = (250.0-TMath::Abs(p.GetZ())+0.11)/0.566;
696// //Float_t dz =
697// // TMath::Abs( Int_t(iz) - iz + 0.5);
698// //ampc *= 1.15*(1-0.3*dy);
699// //ampc *= 1.15*(1-0.3*dz);
700// // Float_t zfactor = (AliTPCReconstructor::GetCtgRange()-0.0004*TMath::Abs(point->GetCPoint().GetZ()));
701// //ampc *=zfactor;
702// }
703// else{
704// //ampc = 1.0*point->GetCPoint().GetMax();
705// ampc = 1.0*cl->GetMax();
706// //ampc = 1.0*point->GetCPoint().GetQ();
707// //AliTPCClusterPoint & p = point->GetCPoint();
708// // Float_t dy = TMath::Abs(Int_t( TMath::Abs(p.GetY()/0.4)) - TMath::Abs(p.GetY()/0.4)+0.5);
709// //Float_t iz = (250.0-TMath::Abs(p.GetZ())+0.11)/0.566;
710// //Float_t dz =
711// // TMath::Abs( Int_t(iz) - iz + 0.5);
712
713// //ampc *= 1.15*(1-0.3*dy);
714// //ampc *= 1.15*(1-0.3*dz);
715// // Float_t zfactor = (1.02-0.000*TMath::Abs(point->GetCPoint().GetZ()));
716// //ampc *=zfactor;
717
718// }
719// ampc *= 2.0; // put mean value to channel 50
720// //ampc *= 0.58; // put mean value to channel 50
721// Float_t w = 1.;
722// // if (type>0) w = 1./(type/2.-0.5);
723// // Float_t z = TMath::Abs(cl->GetZ());
724// if (i<64) {
725// ampc /= 0.6;
726// //ampc /= (1+0.0008*z);
727// } else
728// if (i>128){
729// ampc /=1.5;
730// //ampc /= (1+0.0008*z);
731// }else{
732// //ampc /= (1+0.0008*z);
733// }
81e97e0d 734
ba5e52fb 735// if (type<0) { //amp at the border - lower weight
736// // w*= 2.;
81e97e0d 737
ba5e52fb 738// continue;
739// }
740// if (rsigma>1.5) ampc/=1.3; // if big backround
741// amp[nc[of]] = ampc;
742// amp[nc[of]] /=gainGG;
743// angular[nc[of]] = TMath::Sqrt(1.+angley*angley+anglez*anglez);
744// weight[nc[of]] = w;
745// nc[of]++;
746// }
81e97e0d 747
ba5e52fb 748// TMath::Sort(nc[of],amp,index,kFALSE);
749// Float_t sumamp=0;
750// Float_t sumamp2=0;
751// Float_t sumw=0;
752// //meanlog = amp[index[Int_t(nc[of]*0.33)]];
753// meanlog = 50;
754// for (Int_t i=int(nc[of]*low+0.5);i<int(nc[of]*up+0.5);i++){
755// Float_t ampl = amp[index[i]]/angular[index[i]];
756// ampl = meanlog*TMath::Log(1.+ampl/meanlog);
757// //
758// sumw += weight[index[i]];
759// sumamp += weight[index[i]]*ampl;
760// sumamp2 += weight[index[i]]*ampl*ampl;
761// norm[of] += angular[index[i]]*weight[index[i]];
762// }
763// if (sumw<1){
764// SetdEdx(0);
765// }
766// else {
767// norm[of] /= sumw;
768// mean[of] = sumamp/sumw;
769// sigma[of] = sumamp2/sumw-mean[of]*mean[of];
770// if (sigma[of]>0.1)
771// sigma[of] = TMath::Sqrt(sigma[of]);
772// else
773// sigma[of] = 1000;
81e97e0d 774
ba5e52fb 775// mean[of] = (TMath::Exp(mean[of]/meanlog)-1)*meanlog;
776// //mean *=(1-0.02*(sigma/(mean*0.17)-1.));
777// //mean *=(1-0.1*(norm-1.));
778// }
779// }
780
781// Float_t dedx =0;
782// fSdEdx =0;
783// fMAngular =0;
784// // mean[0]*= (1-0.05*(sigma[0]/(0.01+mean[1]*0.18)-1));
785// // mean[1]*= (1-0.05*(sigma[1]/(0.01+mean[0]*0.18)-1));
81e97e0d 786
787
ba5e52fb 788// // dedx = (mean[0]* TMath::Sqrt((1.+nc[0]))+ mean[1]* TMath::Sqrt((1.+nc[1])) )/
789// // ( TMath::Sqrt((1.+nc[0]))+TMath::Sqrt((1.+nc[1])));
790
791// Int_t norm2 = 0;
792// Int_t norm3 = 0;
793// for (Int_t i =0;i<4;i++){
794// if (nc[i]>2&&nc[i]<1000){
795// dedx += mean[i] *nc[i];
796// fSdEdx += sigma[i]*(nc[i]-2);
797// fMAngular += norm[i] *nc[i];
798// norm2 += nc[i];
799// norm3 += nc[i]-2;
800// }
801// fDEDX[i] = mean[i];
802// fSDEDX[i] = sigma[i];
803// fNCDEDX[i]= nc[i];
804// }
805
806// if (norm3>0){
807// dedx /=norm2;
808// fSdEdx /=norm3;
809// fMAngular/=norm2;
810// }
811// else{
812// SetdEdx(0);
813// return 0;
814// }
815// // Float_t dedx1 =dedx;
816// /*
817// dedx =0;
818// for (Int_t i =0;i<4;i++){
819// if (nc[i]>2&&nc[i]<1000){
820// mean[i] = mean[i]*(1-0.12*(sigma[i]/(fSdEdx)-1.));
821// dedx += mean[i] *nc[i];
822// }
823// fDEDX[i] = mean[i];
824// }
825// dedx /= norm2;
826// */
81e97e0d 827
828
ba5e52fb 829// SetdEdx(dedx);
830// return dedx;
81e97e0d 831}
81e97e0d 832
833void AliTPCseed::CookPID()
834{
835 //
836 // cook PID information according dEdx
837 //
838 Double_t fRange = 10.;
839 Double_t fRes = 0.1;
840 Double_t fMIP = 47.;
841 //
842 Int_t ns=AliPID::kSPECIES;
843 Double_t sumr =0;
844 for (Int_t j=0; j<ns; j++) {
845 Double_t mass=AliPID::ParticleMass(j);
6c94f330 846 Double_t mom=GetP();
81e97e0d 847 Double_t dedx=fdEdx/fMIP;
5731b051 848 Double_t bethe=AliMathBase::BetheBlochAleph(mom/mass);
81e97e0d 849 Double_t sigma=fRes*bethe;
850 if (sigma>0.001){
851 if (TMath::Abs(dedx-bethe) > fRange*sigma) {
852 fTPCr[j]=TMath::Exp(-0.5*fRange*fRange)/sigma;
853 sumr+=fTPCr[j];
854 continue;
855 }
856 fTPCr[j]=TMath::Exp(-0.5*(dedx-bethe)*(dedx-bethe)/(sigma*sigma))/sigma;
857 sumr+=fTPCr[j];
858 }
859 else{
860 fTPCr[j]=1.;
861 sumr+=fTPCr[j];
862 }
863 }
864 for (Int_t j=0; j<ns; j++) {
865 fTPCr[j]/=sumr; //normalize
866 }
867}
868
6c94f330 869Double_t AliTPCseed::GetYat(Double_t xk) const {
870//-----------------------------------------------------------------
871// This function calculates the Y-coordinate of a track at the plane x=xk.
872//-----------------------------------------------------------------
873 if (TMath::Abs(GetSnp())>AliTPCReconstructor::GetMaxSnpTrack()) return 0.; //patch 01 jan 06
60e55aee 874 Double_t c1=GetSnp(), r1=TMath::Sqrt((1.-c1)*(1.+c1));
6c94f330 875 Double_t c2=c1+GetC()*(xk-GetX());
876 if (TMath::Abs(c2)>AliTPCReconstructor::GetMaxSnpTrack()) return 0;
60e55aee 877 Double_t r2=TMath::Sqrt((1.-c2)*(1.+c2));
6c94f330 878 return GetY() + (xk-GetX())*(c1+c2)/(r1+r2);
879}
880
0a65832b 881
882
8a92e133 883Float_t AliTPCseed::CookdEdxNorm(Double_t low, Double_t up, Int_t type, Int_t i1, Int_t i2, Bool_t shapeNorm,Int_t posNorm, Int_t padNorm, Int_t returnVal){
0a65832b 884
885 //
886 // calculates dedx using the cluster
887 // low - up specify trunc mean range - default form 0-0.7
8076baa0 888 // type - 1 - max charge or 0- total charge in cluster
889 // //2- max no corr 3- total+ correction
0a65832b 890 // i1-i2 - the pad-row range used for calculation
ba5e52fb 891 // shapeNorm - kTRUE -taken from OCDB
892 //
893 // posNorm - usage of pos normalization
83afd539 894 // padNorm - pad type normalization
895 // returnVal - 0 return mean
896 // - 1 return RMS
897 // - 2 return number of clusters
898 //
0a65832b 899 // normalization parametrization taken from AliTPCClusterParam
900 //
ba5e52fb 901 AliTPCClusterParam * parcl = AliTPCcalibDB::Instance()->GetClusterParam();
902 AliTPCParam * param = AliTPCcalibDB::Instance()->GetParameters();
903 if (!parcl) return 0;
904 if (!param) return 0;
83afd539 905 Int_t row0 = param->GetNRowLow();
906 Int_t row1 = row0+param->GetNRowUp1();
907
0a65832b 908 Float_t amp[160];
909 Int_t indexes[160];
910 Int_t ncl=0;
911 //
912 //
ba5e52fb 913 Float_t gainGG = 1; // gas gain factor -always enabled
914 Float_t gainPad = 1; // gain map - used always
83afd539 915 Float_t corrShape = 1; // correction due angular effect, diffusion and electron attachment
ba5e52fb 916 Float_t corrPos = 1; // local position correction - if posNorm enabled
917 Float_t corrPadType = 1; // pad type correction - if padNorm enabled
918 Float_t corrNorm = 1; // normalization factor - set Q to channel 50
919 //
920 //
921 //
4cc7ba77 922 if (AliTPCcalibDB::Instance()->GetParameters()){
ba5e52fb 923 gainGG= AliTPCcalibDB::Instance()->GetParameters()->GetGasGain()/20000; //relative gas gain
4cc7ba77 924 }
925
0a65832b 926 const Float_t ktany = TMath::Tan(TMath::DegToRad()*10);
4cc7ba77 927 const Float_t kedgey =3.;
0a65832b 928 //
7cd8ac3f 929 //
0a65832b 930 for (Int_t irow=i1; irow<i2; irow++){
931 AliTPCclusterMI* cluster = GetClusterPointer(irow);
932 if (!cluster) continue;
933 if (TMath::Abs(cluster->GetY())>cluster->GetX()*ktany-kedgey) continue; // edge cluster
8076baa0 934 Float_t charge= (type%2)? cluster->GetMax():cluster->GetQ();
ba5e52fb 935 Int_t ipad= 0;
83afd539 936 if (irow>=row0) ipad=1;
937 if (irow>=row1) ipad=2;
ba5e52fb 938 //
939 //
940 //
941 AliTPCCalPad * gainMap = AliTPCcalibDB::Instance()->GetDedxGainFactor();
942 if (gainMap) {
943 //
944 // Get gainPad - pad by pad calibration
945 //
d6920632 946 Float_t factor = 1;
947 AliTPCCalROC * roc = gainMap->GetCalROC(cluster->GetDetector());
83afd539 948 if (irow < row0) { // IROC
ba5e52fb 949 factor = roc->GetValue(irow, TMath::Nint(cluster->GetPad()));
d6920632 950 } else { // OROC
83afd539 951 factor = roc->GetValue(irow - row0, TMath::Nint(cluster->GetPad()));
d6920632 952 }
ba5e52fb 953 if (factor>0.5) gainPad=factor;
7cd8ac3f 954 }
ba5e52fb 955 //
956 //do position and angular normalization
957 //
958 if (shapeNorm){
959 if (type<=1){
960 //
961 AliTPCTrackerPoint * point = GetTrackPoint(irow);
962 Float_t ty = TMath::Abs(point->GetAngleY());
83afd539 963 Float_t tz = TMath::Abs(point->GetAngleZ()*TMath::Sqrt(1+ty*ty));
ba5e52fb 964
965 Float_t dr = (250.-TMath::Abs(cluster->GetZ()))/250.;
966 corrShape = parcl->Qnorm(ipad,type,dr,ty,tz);
967 }
0a65832b 968 }
ba5e52fb 969
8a92e133 970 if (posNorm>0){
8e1dcdda 971 //
ba5e52fb 972 // Do position normalization - relative distance to
973 // center of pad- time bin
974 // Work in progress
022a2383 975 // corrPos = parcl->QnormPos(ipad,type, cluster->GetPad(),
976 // cluster->GetTimeBin(), cluster->GetZ(),
977 // cluster->GetSigmaY2(),cluster->GetSigmaZ2(),
978 // cluster->GetMax(),cluster->GetQ());
8a92e133 979 // scaled response function
980 Float_t yres0 = parcl->GetRMS0(0,ipad,0,0)/param->GetPadPitchWidth(cluster->GetDetector());
981 Float_t zres0 = parcl->GetRMS0(1,ipad,0,0)/param->GetZWidth();
982 //
983
022a2383 984 AliTPCTrackerPoint * point = GetTrackPoint(irow);
985 Float_t ty = TMath::Abs(point->GetAngleY());
986 Float_t tz = TMath::Abs(point->GetAngleZ()*TMath::Sqrt(1+ty*ty));
987
988 if (type==1) corrPos =
989 parcl->QmaxCorrection(cluster->GetDetector(), cluster->GetRow(),cluster->GetPad(),
8a92e133 990 cluster->GetTimeBin(),ty,tz,yres0,zres0,0.4);
022a2383 991 if (type==0) corrPos =
992 parcl->QtotCorrection(cluster->GetDetector(), cluster->GetRow(),cluster->GetPad(),
8a92e133 993 cluster->GetTimeBin(),ty,tz,yres0,zres0,cluster->GetQ(),2.5,0.4);
994 if (posNorm==3){
995 Float_t dr = (250.-TMath::Abs(cluster->GetZ()))/250.;
996 Double_t signtgl = (cluster->GetZ()*point->GetAngleZ()>0)? 1:-1;
997 Double_t p2 = TMath::Abs(TMath::Sin(TMath::ATan(ty)));
998 Float_t corrHis = parcl->QnormHis(ipad,type,dr,p2,TMath::Abs(point->GetAngleZ())*signtgl);
999 if (corrHis>0) corrPos*=corrHis;
1000 }
1001
8e1dcdda 1002 }
1003
ba5e52fb 1004 if (padNorm==1){
1005 //taken from OCDB
798017c7 1006 if (type==0 && parcl->QpadTnorm()) corrPadType = (*parcl->QpadTnorm())[ipad];
1007 if (type==1 && parcl->QpadMnorm()) corrPadType = (*parcl->QpadMnorm())[ipad];
022a2383 1008
2fc9608f 1009 }
ba5e52fb 1010 if (padNorm==2){
1011 corrPadType =param->GetPadPitchLength(cluster->GetDetector(),cluster->GetRow());
1012 //use hardwired - temp fix
1013 if (type==0) corrNorm=3.;
1014 if (type==1) corrNorm=1.;
1015 }
1016 //
1017 amp[ncl]=charge;
1018 amp[ncl]/=gainGG;
1019 amp[ncl]/=gainPad;
1020 amp[ncl]/=corrShape;
1021 amp[ncl]/=corrPadType;
1022 amp[ncl]/=corrPos;
1023 amp[ncl]/=corrNorm;
1024 //
0a65832b 1025 ncl++;
1026 }
8076baa0 1027
0a65832b 1028 if (type>3) return ncl;
1029 TMath::Sort(ncl,amp, indexes, kFALSE);
1030
8076baa0 1031 if (ncl<10) return 0;
0a65832b 1032
1033 Float_t suma=0;
83afd539 1034 Float_t suma2=0;
0a65832b 1035 Float_t sumn=0;
1036 Int_t icl0=TMath::Nint(ncl*low);
1037 Int_t icl1=TMath::Nint(ncl*up);
1038 for (Int_t icl=icl0; icl<icl1;icl++){
1039 suma+=amp[indexes[icl]];
83afd539 1040 suma2+=amp[indexes[icl]]*amp[indexes[icl]];
0a65832b 1041 sumn++;
1042 }
83afd539 1043 Float_t mean =suma/sumn;
1044 Float_t rms =TMath::Sqrt(TMath::Abs(suma2/sumn-mean*mean));
3af3fbc4 1045 //
1046 // do time-dependent correction for pressure and temperature variations
1047 UInt_t runNumber = 1;
1048 Float_t corrTimeGain = 1;
1049 AliTPCTransform * trans = AliTPCcalibDB::Instance()->GetTransform();
e5e80ff9 1050 const AliTPCRecoParam * recoParam = AliTPCcalibDB::Instance()->GetTransform()->GetCurrentRecoParam();
1051 if (trans && recoParam->GetUseGainCorrectionTime()>0) {
3af3fbc4 1052 runNumber = trans->GetCurrentRunNumber();
e5e80ff9 1053 //AliTPCcalibDB::Instance()->SetRun(runNumber);
a2c3785e 1054 TObjArray * timeGainSplines = AliTPCcalibDB::Instance()->GetTimeGainSplinesRun(runNumber);
3af3fbc4 1055 if (timeGainSplines) {
1056 UInt_t time = trans->GetCurrentTimeStamp();
1057 AliSplineFit * fitMIP = (AliSplineFit *) timeGainSplines->At(0);
1058 AliSplineFit * fitFPcosmic = (AliSplineFit *) timeGainSplines->At(1);
1059 if (fitMIP) {
108a67db 1060 corrTimeGain = AliTPCcalibDButil::EvalGraphConst(fitMIP, time);/*fitMIP->Eval(time);*/
3af3fbc4 1061 } else {
108a67db 1062 if (fitFPcosmic) corrTimeGain = AliTPCcalibDButil::EvalGraphConst(fitFPcosmic, time);/*fitFPcosmic->Eval(time);*/
3af3fbc4 1063 }
1064 }
1065 }
1066 mean /= corrTimeGain;
1067 rms /= corrTimeGain;
1068 //
83afd539 1069 if (returnVal==1) return rms;
8a92e133 1070 if (returnVal==2) return ncl;
1071 return mean;
1072}
1073
6feb400f 1074Float_t AliTPCseed::CookdEdxAnalytical(Double_t low, Double_t up, Int_t type, Int_t i1, Int_t i2, Int_t returnVal, Int_t rowThres, Int_t mode){
8a92e133 1075
1076 //
1077 // calculates dedx using the cluster
1078 // low - up specify trunc mean range - default form 0-0.7
1079 // type - 1 - max charge or 0- total charge in cluster
1080 // //2- max no corr 3- total+ correction
1081 // i1-i2 - the pad-row range used for calculation
1082 //
1083 // posNorm - usage of pos normalization
6feb400f 1084 // returnVal - 0 return mean
1085 // - 1 return RMS
1086 // - 2 return number of clusters
1087 // - 3 ratio
1088 // - 4 mean upper half
1089 // - 5 mean - lower half
1090 // - 6 third moment
1091 // mode - 0 - linear
1092 // - 1 - logatithmic
2efc897f 1093 // rowThres - number of rows before and after given pad row to check for clusters below threshold
8a92e133 1094 //
1095 // normalization parametrization taken from AliTPCClusterParam
1096 //
1097 AliTPCClusterParam * parcl = AliTPCcalibDB::Instance()->GetClusterParam();
1098 AliTPCParam * param = AliTPCcalibDB::Instance()->GetParameters();
1099 if (!parcl) return 0;
1100 if (!param) return 0;
1101 Int_t row0 = param->GetNRowLow();
1102 Int_t row1 = row0+param->GetNRowUp1();
1103
1104 Float_t amp[160];
1105 Int_t indexes[160];
1106 Int_t ncl=0;
2efc897f 1107 Int_t nclBelowThr = 0; // counts number of clusters below threshold
8a92e133 1108 //
1109 //
1110 Float_t gainGG = 1; // gas gain factor -always enabled
1111 Float_t gainPad = 1; // gain map - used always
1112 Float_t corrPos = 1; // local position correction - if posNorm enabled
8a92e133 1113 //
1114 //
1115 //
1116 if (AliTPCcalibDB::Instance()->GetParameters()){
1117 gainGG= AliTPCcalibDB::Instance()->GetParameters()->GetGasGain()/20000; //relative gas gain
1118 }
649fcc43 1119 //
1120 // extract time-dependent correction for pressure and temperature variations
1121 //
1122 UInt_t runNumber = 1;
1123 Float_t corrTimeGain = 1;
1124 TObjArray * timeGainSplines = 0x0;
1125 TGraphErrors * grPadEqual = 0x0;
1126 //
1127 AliTPCTransform * trans = AliTPCcalibDB::Instance()->GetTransform();
1128 const AliTPCRecoParam * recoParam = AliTPCcalibDB::Instance()->GetTransform()->GetCurrentRecoParam();
6d64657a 1129 //
1130 if (recoParam->GetNeighborRowsDedx() == 0) rowThres = 0;
1131 //
649fcc43 1132 if (trans) {
2efc897f 1133 runNumber = trans->GetCurrentRunNumber();
1134 //AliTPCcalibDB::Instance()->SetRun(runNumber);
1135 timeGainSplines = AliTPCcalibDB::Instance()->GetTimeGainSplinesRun(runNumber);
1136 if (timeGainSplines && recoParam->GetUseGainCorrectionTime()>0) {
1137 UInt_t time = trans->GetCurrentTimeStamp();
1138 AliSplineFit * fitMIP = (AliSplineFit *) timeGainSplines->At(0);
1139 AliSplineFit * fitFPcosmic = (AliSplineFit *) timeGainSplines->At(1);
1140 if (fitMIP) {
1141 corrTimeGain = AliTPCcalibDButil::EvalGraphConst(fitMIP, time); /*fitMIP->Eval(time);*/
649fcc43 1142 } else {
2efc897f 1143 if (fitFPcosmic) corrTimeGain = AliTPCcalibDButil::EvalGraphConst(fitFPcosmic, time); /*fitFPcosmic->Eval(time); */
1144 }
649fcc43 1145 //
1146 if (type==1) grPadEqual = (TGraphErrors * ) timeGainSplines->FindObject("TGRAPHERRORS_MEANQMAX_PADREGIONGAIN_BEAM_ALL");
1147 if (type==0) grPadEqual = (TGraphErrors * ) timeGainSplines->FindObject("TGRAPHERRORS_MEANQTOT_PADREGIONGAIN_BEAM_ALL");
2efc897f 1148 }
649fcc43 1149 }
2efc897f 1150
1151 const Float_t kClusterShapeCut = 1.5; // IMPPRTANT TO DO: move value to AliTPCRecoParam
8a92e133 1152 const Float_t ktany = TMath::Tan(TMath::DegToRad()*10);
1153 const Float_t kedgey =3.;
1154 //
1155 //
1156 for (Int_t irow=i1; irow<i2; irow++){
1157 AliTPCclusterMI* cluster = GetClusterPointer(irow);
736a5826 1158 if (!cluster && irow > 1 && irow < 157) {
2efc897f 1159 Bool_t isClBefore = kFALSE;
1160 Bool_t isClAfter = kFALSE;
1161 for(Int_t ithres = 1; ithres <= rowThres; ithres++) {
1162 AliTPCclusterMI * clusterBefore = GetClusterPointer(irow - ithres);
1163 if (clusterBefore) isClBefore = kTRUE;
1164 AliTPCclusterMI * clusterAfter = GetClusterPointer(irow + ithres);
1165 if (clusterAfter) isClAfter = kTRUE;
1166 }
1167 if (isClBefore && isClAfter) nclBelowThr++;
2efc897f 1168 }
736a5826 1169 if (!cluster) continue;
2efc897f 1170 //
1171 //
8a92e133 1172 if (TMath::Abs(cluster->GetY())>cluster->GetX()*ktany-kedgey) continue; // edge cluster
2efc897f 1173 //
1174 AliTPCTrackerPoint * point = GetTrackPoint(irow);
1175 if (point==0) continue;
1176 Float_t rsigmay = TMath::Sqrt(point->GetSigmaY());
1177 if (rsigmay > kClusterShapeCut) continue;
1178 //
1179 if (cluster->IsUsed(11)) continue; // remove shared clusters for PbPb
1180 //
8a92e133 1181 Float_t charge= (type%2)? cluster->GetMax():cluster->GetQ();
1182 Int_t ipad= 0;
1183 if (irow>=row0) ipad=1;
1184 if (irow>=row1) ipad=2;
1185 //
1186 //
1187 //
1188 AliTPCCalPad * gainMap = AliTPCcalibDB::Instance()->GetDedxGainFactor();
1189 if (gainMap) {
1190 //
1191 // Get gainPad - pad by pad calibration
1192 //
1193 Float_t factor = 1;
1194 AliTPCCalROC * roc = gainMap->GetCalROC(cluster->GetDetector());
1195 if (irow < row0) { // IROC
1196 factor = roc->GetValue(irow, TMath::Nint(cluster->GetPad()));
1197 } else { // OROC
1198 factor = roc->GetValue(irow - row0, TMath::Nint(cluster->GetPad()));
1199 }
2efc897f 1200 if (factor>0.3) gainPad=factor;
8a92e133 1201 }
8a92e133 1202 //
1203 // Do position normalization - relative distance to
1204 // center of pad- time bin
1205
8a92e133 1206 Float_t ty = TMath::Abs(point->GetAngleY());
1207 Float_t tz = TMath::Abs(point->GetAngleZ()*TMath::Sqrt(1+ty*ty));
1208 Float_t yres0 = parcl->GetRMS0(0,ipad,0,0)/param->GetPadPitchWidth(cluster->GetDetector());
1209 Float_t zres0 = parcl->GetRMS0(1,ipad,0,0)/param->GetZWidth();
1210
1211 yres0 *=parcl->GetQnormCorr(ipad, type,0);
1212 zres0 *=parcl->GetQnormCorr(ipad, type,1);
1213 Float_t effLength=parcl->GetQnormCorr(ipad, type,4)*0.5;
1214 Float_t effDiff =(parcl->GetQnormCorr(ipad, type,2)+parcl->GetQnormCorr(ipad, type,3))*0.5;
1215 //
1216 if (type==1) {
1217 corrPos = parcl->GetQnormCorr(ipad, type,5)*
1218 parcl->QmaxCorrection(cluster->GetDetector(), cluster->GetRow(),cluster->GetPad(),
1219 cluster->GetTimeBin(),ty,tz,yres0,zres0,effLength,effDiff);
1220 Float_t drm = 0.5-TMath::Abs(cluster->GetZ()/250.);
1221 corrPos*=(1+parcl->GetQnormCorr(ipad, type+2,0)*drm);
1222 corrPos*=(1+parcl->GetQnormCorr(ipad, type+2,1)*ty*ty);
1223 corrPos*=(1+parcl->GetQnormCorr(ipad, type+2,2)*tz*tz);
1224 //
1225 }
1226 if (type==0) {
1227 corrPos = parcl->GetQnormCorr(ipad, type,5)*
1228 parcl->QtotCorrection(cluster->GetDetector(), cluster->GetRow(),cluster->GetPad(),
1229 cluster->GetTimeBin(),ty,tz,yres0,zres0,cluster->GetQ(),2.5,effLength,effDiff);
1230
1231 Float_t drm = 0.5-TMath::Abs(cluster->GetZ()/250.);
1232 corrPos*=(1+parcl->GetQnormCorr(ipad, type+2,0)*drm);
1233 corrPos*=(1+parcl->GetQnormCorr(ipad, type+2,1)*ty*ty);
1234 corrPos*=(1+parcl->GetQnormCorr(ipad, type+2,2)*tz*tz);
1235 //
1236 }
2efc897f 1237 //
1238 // pad region equalization outside of cluster param
1239 //
1240 Float_t gainEqualPadRegion = 1;
649fcc43 1241 if (grPadEqual) gainEqualPadRegion = grPadEqual->Eval(ipad);
8a92e133 1242 //
1243 amp[ncl]=charge;
1244 amp[ncl]/=gainGG;
1245 amp[ncl]/=gainPad;
1246 amp[ncl]/=corrPos;
2efc897f 1247 amp[ncl]/=gainEqualPadRegion;
8a92e133 1248 //
1249 ncl++;
1250 }
1251
6feb400f 1252 if (type==2) return ncl;
8a92e133 1253 TMath::Sort(ncl,amp, indexes, kFALSE);
2efc897f 1254 //
8a92e133 1255 if (ncl<10) return 0;
2efc897f 1256 //
1257 Double_t * ampWithBelow = new Double_t[ncl + nclBelowThr];
1258 for(Int_t iCl = 0; iCl < ncl + nclBelowThr; iCl++) {
1259 if (iCl < nclBelowThr) {
1260 ampWithBelow[iCl] = amp[indexes[0]];
1261 } else {
1262 ampWithBelow[iCl] = amp[indexes[iCl - nclBelowThr]];
1263 }
1264 }
1265 //printf("DEBUG: %i shit %f", nclBelowThr, amp[indexes[0]]);
1266 //
8a92e133 1267 Float_t suma=0;
1268 Float_t suma2=0;
6feb400f 1269 Float_t suma3=0;
1270 Float_t sumaS=0;
8a92e133 1271 Float_t sumn=0;
6feb400f 1272 // upper,and lower part statistic
1273 Float_t sumL=0, sumL2=0, sumLN=0;
1274 Float_t sumD=0, sumD2=0, sumDN=0;
1275
2efc897f 1276 Int_t icl0=TMath::Nint((ncl + nclBelowThr)*low);
1277 Int_t icl1=TMath::Nint((ncl + nclBelowThr)*up);
6feb400f 1278 Int_t iclm=TMath::Nint((ncl + nclBelowThr)*(low +(up+low)*0.5));
1279 //
8a92e133 1280 for (Int_t icl=icl0; icl<icl1;icl++){
6feb400f 1281 if (ampWithBelow[icl]<0.1) continue;
504dd8df 1282 Double_t camp=ampWithBelow[icl]/corrTimeGain;
1283 if (mode==1) camp= TMath::Log(camp);
6feb400f 1284 if (icl<icl1){
504dd8df 1285 suma+=camp;
1286 suma2+=camp*camp;
1287 suma3+=camp*camp*camp;
1288 sumaS+=TMath::Power(TMath::Abs(camp),1./3.);
6feb400f 1289 sumn++;
1290 }
1291 if (icl>iclm){
504dd8df 1292 sumL+=camp;
1293 sumL2+=camp*camp;
6feb400f 1294 sumLN++;
1295 }
1296 if (icl<=iclm){
504dd8df 1297 sumD+=camp;
1298 sumD2+=camp*camp;
6feb400f 1299 sumDN++;
1300 }
8a92e133 1301 }
0f7547f1 1302 //
1303 Float_t mean = 0;
1304 Float_t meanL = 0;
1305 Float_t meanD = 0; // lower half mean
1306 if (sumn > 1e-30) mean =suma/sumn;
1307 if (sumLN > 1e-30) meanL =sumL/sumLN;
1308 if (sumDN > 1e-30) meanD =(sumD/sumDN);
1309 /*
8a92e133 1310 Float_t mean =suma/sumn;
6feb400f 1311 Float_t meanL = sumL/sumLN;
1312 Float_t meanD =(sumD/sumDN); // lower half mean
0f7547f1 1313 */
28273e26 1314
1315 Float_t rms = 0;
1316 Float_t mean2=0;
1317 Float_t mean3=0;
1318 Float_t meanS=0;
1319
1320 if(sumn>0){
1321 rms = TMath::Sqrt(TMath::Abs(suma2/sumn-mean*mean));
1322 mean2=suma2/sumn;
1323 mean3=suma3/sumn;
1324 meanS=sumaS/sumn;
1325 }
1326
6feb400f 1327 if (mean2>0) mean2=TMath::Power(TMath::Abs(mean2),1./2.);
1328 if (mean3>0) mean3=TMath::Power(TMath::Abs(mean3),1./3.);
1329 if (meanS>0) meanS=TMath::Power(TMath::Abs(meanS),3.);
3af3fbc4 1330 //
6feb400f 1331 if (mode==1) mean=TMath::Exp(mean);
1332 if (mode==1) meanL=TMath::Exp(meanL); // upper truncation
1333 if (mode==1) meanD=TMath::Exp(meanD); // lower truncation
1334 //
1335 delete [] ampWithBelow;
1336
1337
3af3fbc4 1338 //
8a92e133 1339 if (returnVal==1) return rms;
83afd539 1340 if (returnVal==2) return ncl;
6feb400f 1341 if (returnVal==3) return Double_t(nclBelowThr)/Double_t(nclBelowThr+ncl);
1342 if (returnVal==4) return meanL;
1343 if (returnVal==5) return meanD;
1344 if (returnVal==6) return mean2;
1345 if (returnVal==7) return mean3;
1346 if (returnVal==8) return meanS;
83afd539 1347 return mean;
0a65832b 1348}
1349
83afd539 1350
0a65832b 1351
1352
eb02f63a 1353Float_t AliTPCseed::CookShape(Int_t type){
1354 //
1355 //
1356 //
1357 //-----------------------------------------------------------------
1358 // This funtion calculates dE/dX within the "low" and "up" cuts.
1359 //-----------------------------------------------------------------
1360 Float_t means=0;
1361 Float_t meanc=0;
1362 for (Int_t i =0; i<160;i++) {
1363 AliTPCTrackerPoint * point = GetTrackPoint(i);
1364 if (point==0) continue;
1365
1366 AliTPCclusterMI * cl = fClusterPointer[i];
1367 if (cl==0) continue;
1368
1369 Float_t rsigmay = TMath::Sqrt(point->GetSigmaY());
1370 Float_t rsigmaz = TMath::Sqrt(point->GetSigmaZ());
1371 Float_t rsigma = (rsigmay+rsigmaz)*0.5;
1372 if (type==0) means+=rsigma;
1373 if (type==1) means+=rsigmay;
1374 if (type==2) means+=rsigmaz;
1375 meanc++;
1376 }
1377 Float_t mean = (meanc>0)? means/meanc:0;
1378 return mean;
1379}
87e92a27 1380
1381
1382
1383Int_t AliTPCseed::RefitTrack(AliTPCseed *seed, AliExternalTrackParam * parin, AliExternalTrackParam * parout){
1384 //
1385 // Refit the track
1386 // return value - number of used clusters
1387 //
1388 //
1389 const Int_t kMinNcl =10;
1390 AliTPCseed *track=new AliTPCseed(*seed);
1391 Int_t sector=-1;
1392 // reset covariance
1393 //
1394 Double_t covar[15];
1395 for (Int_t i=0;i<15;i++) covar[i]=0;
1396 covar[0]=10.*10.;
1397 covar[2]=10.*10.;
1398 covar[5]=10.*10./(64.*64.);
1399 covar[9]=10.*10./(64.*64.);
1400 covar[14]=1*1;
1401 //
1402
1403 Float_t xmin=1000, xmax=-10000;
1404 Int_t imin=158, imax=0;
1405 for (Int_t i=0;i<160;i++) {
1406 AliTPCclusterMI *c=track->GetClusterPointer(i);
1407 if (!c) continue;
1408 if (sector<0) sector = c->GetDetector();
1409 if (c->GetX()<xmin) xmin=c->GetX();
1410 if (c->GetX()>xmax) xmax=c->GetX();
1411 if (i<imin) imin=i;
1412 if (i>imax) imax=i;
1413 }
1414 if(imax-imin<kMinNcl) {
1415 delete track;
1416 return 0 ;
1417 }
1418 // Not succes to rotate
1419 if (!track->Rotate(TMath::DegToRad()*(sector%18*20.+10.)-track->GetAlpha())) {
1420 delete track;
1421 return 0;
1422 }
1423 //
1424 //
1425 // fit from inner to outer row
1426 //
1427 AliExternalTrackParam paramIn;
1428 AliExternalTrackParam paramOut;
1429 Bool_t isOK=kTRUE;
be34cb88 1430 Int_t ncl=0;
87e92a27 1431 //
1432 //
1433 //
1434 for (Int_t i=imin; i<=imax; i++){
1435 AliTPCclusterMI *c=track->GetClusterPointer(i);
1436 if (!c) continue;
1437 // if (RejectCluster(c,track)) continue;
be34cb88 1438 sector = (c->GetDetector()%18);
1439 if (!track->Rotate(TMath::DegToRad()*(sector%18*20.+10.)-track->GetAlpha())) {
1440 //continue;
1441 }
87e92a27 1442 Double_t r[3]={c->GetX(),c->GetY(),c->GetZ()};
1443 Double_t cov[3]={0.01,0.,0.01}; //TODO: correct error parametrisation
1444 if (!track->PropagateTo(r[0])) {
1445 isOK=kFALSE;
87e92a27 1446 }
1447 if ( !((static_cast<AliExternalTrackParam*>(track)->Update(&r[1],cov)))) isOK=kFALSE;
1448 }
1449 if (!isOK) { delete track; return 0;}
1450 track->AddCovariance(covar);
1451 //
1452 //
1453 //
1454 for (Int_t i=imax; i>=imin; i--){
1455 AliTPCclusterMI *c=track->GetClusterPointer(i);
1456 if (!c) continue;
1457 //if (RejectCluster(c,track)) continue;
be34cb88 1458 sector = (c->GetDetector()%18);
1459 if (!track->Rotate(TMath::DegToRad()*(sector%18*20.+10.)-track->GetAlpha())) {
1460 //continue;
1461 }
87e92a27 1462 Double_t r[3]={c->GetX(),c->GetY(),c->GetZ()};
1463 Double_t cov[3]={0.01,0.,0.01}; //TODO: correct error parametrisation
1464 if (!track->PropagateTo(r[0])) {
1465 isOK=kFALSE;
87e92a27 1466 }
1467 if ( !((static_cast<AliExternalTrackParam*>(track)->Update(&r[1],cov)))) isOK=kFALSE;
1468 }
be34cb88 1469 //if (!isOK) { delete track; return 0;}
87e92a27 1470 paramIn = *track;
1471 track->AddCovariance(covar);
1472 //
1473 //
1474 for (Int_t i=imin; i<=imax; i++){
1475 AliTPCclusterMI *c=track->GetClusterPointer(i);
1476 if (!c) continue;
be34cb88 1477 sector = (c->GetDetector()%18);
1478 if (!track->Rotate(TMath::DegToRad()*(sector%18*20.+10.)-track->GetAlpha())) {
1479 //continue;
1480 }
1481 ncl++;
87e92a27 1482 //if (RejectCluster(c,track)) continue;
1483 Double_t r[3]={c->GetX(),c->GetY(),c->GetZ()};
1484 Double_t cov[3]={0.01,0.,0.01}; //TODO: correct error parametrisation
1485 if (!track->PropagateTo(r[0])) {
1486 isOK=kFALSE;
87e92a27 1487 }
1488 if ( !((static_cast<AliExternalTrackParam*>(track)->Update(&r[1],cov)))) isOK=kFALSE;
1489 }
be34cb88 1490 //if (!isOK) { delete track; return 0;}
87e92a27 1491 paramOut=*track;
87e92a27 1492 //
1493 //
1494 //
1495 if (parin) (*parin)=paramIn;
1496 if (parout) (*parout)=paramOut;
6e23caff 1497 delete track;
be34cb88 1498 return ncl;
87e92a27 1499}
1500
1501
1502
1503Bool_t AliTPCseed::RefitTrack(AliTPCseed* /*seed*/, Bool_t /*out*/){
1504 //
1505 //
1506 //
1507 return kFALSE;
1508}
3247d397 1509
1510
1511
1512
1513
1514
1515void AliTPCseed::GetError(AliTPCclusterMI* cluster, AliExternalTrackParam * param,
1516 Double_t& erry, Double_t &errz)
1517{
1518 //
1519 // Get cluster error at given position
1520 //
1521 AliTPCClusterParam *clusterParam = AliTPCcalibDB::Instance()->GetClusterParam();
1522 Double_t tany,tanz;
1523 Double_t snp1=param->GetSnp();
60e55aee 1524 tany=snp1/TMath::Sqrt((1.-snp1)*(1.+snp1));
3247d397 1525 //
1526 Double_t tgl1=param->GetTgl();
60e55aee 1527 tanz=tgl1/TMath::Sqrt((1.-snp1)*(1.+snp1));
3247d397 1528 //
1529 Int_t padSize = 0; // short pads
1530 if (cluster->GetDetector() >= 36) {
1531 padSize = 1; // medium pads
1532 if (cluster->GetRow() > 63) padSize = 2; // long pads
1533 }
1534
1535 erry = clusterParam->GetError0Par( 0, padSize, (250.0 - TMath::Abs(cluster->GetZ())), TMath::Abs(tany) );
1536 errz = clusterParam->GetError0Par( 1, padSize, (250.0 - TMath::Abs(cluster->GetZ())), TMath::Abs(tanz) );
1537}
1538
1539
1540void AliTPCseed::GetShape(AliTPCclusterMI* cluster, AliExternalTrackParam * param,
1541 Double_t& rmsy, Double_t &rmsz)
1542{
1543 //
1544 // Get cluster error at given position
1545 //
1546 AliTPCClusterParam *clusterParam = AliTPCcalibDB::Instance()->GetClusterParam();
1547 Double_t tany,tanz;
1548 Double_t snp1=param->GetSnp();
60e55aee 1549 tany=snp1/TMath::Sqrt((1.-snp1)*(1.+snp1));
3247d397 1550 //
1551 Double_t tgl1=param->GetTgl();
60e55aee 1552 tanz=tgl1/TMath::Sqrt((1.-snp1)*(1.+snp1));
3247d397 1553 //
1554 Int_t padSize = 0; // short pads
1555 if (cluster->GetDetector() >= 36) {
1556 padSize = 1; // medium pads
1557 if (cluster->GetRow() > 63) padSize = 2; // long pads
1558 }
1559
1560 rmsy = clusterParam->GetRMSQ( 0, padSize, (250.0 - TMath::Abs(cluster->GetZ())), TMath::Abs(tany), TMath::Abs(cluster->GetMax()) );
1561 rmsz = clusterParam->GetRMSQ( 1, padSize, (250.0 - TMath::Abs(cluster->GetZ())), TMath::Abs(tanz) ,TMath::Abs(cluster->GetMax()));
1562}
ba5e52fb 1563
1564
1565
1566Double_t AliTPCseed::GetQCorrGeom(Float_t ty, Float_t tz){
1567 //Geoetrical
1568 //ty - tangent in local y direction
1569 //tz - tangent
1570 //
1571 Float_t norm=TMath::Sqrt(1+ty*ty+tz*tz);
1572 return norm;
1573}
1574
83afd539 1575Double_t AliTPCseed::GetQCorrShape(Int_t ipad, Int_t type,Float_t z, Float_t ty, Float_t tz, Float_t /*q*/, Float_t /*thr*/){
ba5e52fb 1576 //
1577 // Q normalization
1578 //
1579 // return value = Q Normalization factor
1580 // Normalization - 1 - shape factor part for full drift
1581 // 1 - electron attachment for 0 drift
1582
1583 // Input parameters:
1584 //
1585 // ipad - 0 short pad
1586 // 1 medium pad
1587 // 2 long pad
1588 //
1589 // type - 0 qmax
1590 // - 1 qtot
1591 //
1592 //z - z position (-250,250 cm)
1593 //ty - tangent in local y direction
1594 //tz - tangent
1595 //
1596
1597 AliTPCClusterParam * paramCl = AliTPCcalibDB::Instance()->GetClusterParam();
1598 AliTPCParam * paramTPC = AliTPCcalibDB::Instance()->GetParameters();
1599
1600 if (!paramCl) return 1;
1601 //
1602 Double_t dr = 250.-TMath::Abs(z);
1603 Double_t sy = paramCl->GetRMS0( 0,ipad, dr, TMath::Abs(ty));
1604 Double_t sy0= paramCl->GetRMS0(0,ipad, 250, 0);
1605 Double_t sz = paramCl->GetRMS0( 1,ipad, dr, TMath::Abs(tz));
1606 Double_t sz0= paramCl->GetRMS0(1,ipad, 250, 0);
1607
1608 Double_t sfactorMax = TMath::Sqrt(sy0*sz0/(sy*sz));
1609
1610
1611 Double_t dt = 1000000*(dr/paramTPC->GetDriftV()); //time in microsecond
1612 Double_t attProb = TMath::Exp(-paramTPC->GetAttCoef()*paramTPC->GetOxyCont()*dt);
1613 //
1614 //
1615 if (type==0) return sfactorMax*attProb;
1616
1617 return attProb;
1618
1619
1620}
1621
64bf5ca0 1622
1623//_______________________________________________________________________
1624Float_t AliTPCseed::GetTPCClustInfo(Int_t nNeighbours, Int_t type, Int_t row0, Int_t row1)
1625{
1626 //
1627 // TPC cluster information
1628 // type 0: get fraction of found/findable clusters with neighbourhood definition
1629 // 1: found clusters
1630 // 2: findable (number of clusters above and below threshold)
1631 //
1632 // definition of findable clusters:
1633 // a cluster is defined as findable if there is another cluster
1634 // within +- nNeighbours pad rows. The idea is to overcome threshold
1635 // effects with a very simple algorithm.
1636 //
1637
1638 const Float_t kClusterShapeCut = 1.5; // IMPPRTANT TO DO: move value to AliTPCRecoParam
1639 const Float_t ktany = TMath::Tan(TMath::DegToRad()*10);
1640 const Float_t kedgey =3.;
1641
1642 Float_t ncl = 0;
1643 Float_t nclBelowThr = 0; // counts number of clusters below threshold
1644
1645 for (Int_t irow=row0; irow<row1; irow++){
1646 AliTPCclusterMI* cluster = GetClusterPointer(irow);
1647
1648 if (!cluster && irow > 1 && irow < 157) {
1649 Bool_t isClBefore = kFALSE;
1650 Bool_t isClAfter = kFALSE;
1651 for(Int_t ithres = 1; ithres <= nNeighbours; ithres++) {
1652 AliTPCclusterMI * clusterBefore = GetClusterPointer(irow - ithres);
1653 if (clusterBefore) isClBefore = kTRUE;
1654 AliTPCclusterMI * clusterAfter = GetClusterPointer(irow + ithres);
1655 if (clusterAfter) isClAfter = kTRUE;
1656 }
1657 if (isClBefore && isClAfter) nclBelowThr++;
1658 }
1659 if (!cluster) continue;
1660 //
1661 //
1662 if (TMath::Abs(cluster->GetY())>cluster->GetX()*ktany-kedgey) continue; // edge cluster
1663 //
1664 AliTPCTrackerPoint * point = GetTrackPoint(irow);
1665 if (point==0) continue;
1666 Float_t rsigmay = TMath::Sqrt(point->GetSigmaY());
1667 if (rsigmay > kClusterShapeCut) continue;
1668 //
1669 if (cluster->IsUsed(11)) continue; // remove shared clusters for PbPb
1670 ncl++;
1671 }
1672
1673 if(ncl<10)
1674 return 0;
1675 if(type==0)
1676 if(nclBelowThr+ncl>0)
1677 return ncl/(nclBelowThr+ncl);
1678 if(type==1)
1679 return ncl;
1680 if(type==2)
1681 return ncl+nclBelowThr;
1682 return 0;
1683}