1 /**************************************************************************
2 * Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved. *
4 * Author: The ALICE Off-line Project. *
5 * Contributors are mentioned in the code where appropriate. *
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 **************************************************************************/
18 ////////////////////////////////////////////////////////////////////////////
20 // The TRD track seed //
23 // Alex Bercuci <A.Bercuci@gsi.de> //
24 // Markus Fasel <M.Fasel@gsi.de> //
26 ////////////////////////////////////////////////////////////////////////////
29 #include "TLinearFitter.h"
30 #include "TClonesArray.h" // tmp
31 #include <TTreeStream.h>
34 #include "AliMathBase.h"
35 #include "AliCDBManager.h"
36 #include "AliTracker.h"
38 #include "AliTRDpadPlane.h"
39 #include "AliTRDcluster.h"
40 #include "AliTRDseedV1.h"
41 #include "AliTRDtrackV1.h"
42 #include "AliTRDcalibDB.h"
43 #include "AliTRDchamberTimeBin.h"
44 #include "AliTRDtrackingChamber.h"
45 #include "AliTRDtrackerV1.h"
46 #include "AliTRDReconstructor.h"
47 #include "AliTRDrecoParam.h"
48 #include "AliTRDCommonParam.h"
50 #include "Cal/AliTRDCalPID.h"
51 #include "Cal/AliTRDCalROC.h"
52 #include "Cal/AliTRDCalDet.h"
54 ClassImp(AliTRDseedV1)
56 //____________________________________________________________________
57 AliTRDseedV1::AliTRDseedV1(Int_t det)
88 for(Int_t ic=kNTimeBins; ic--;) fIndexes[ic] = -1;
89 memset(fClusters, 0, kNTimeBins*sizeof(AliTRDcluster*));
90 fYref[0] = 0.; fYref[1] = 0.;
91 fZref[0] = 0.; fZref[1] = 0.;
92 fYfit[0] = 0.; fYfit[1] = 0.;
93 fZfit[0] = 0.; fZfit[1] = 0.;
94 memset(fdEdx, 0, kNSlices*sizeof(Float_t));
95 for(int ispec=0; ispec<AliPID::kSPECIES; ispec++) fProb[ispec] = -1.;
96 fLabels[0]=-1; fLabels[1]=-1; // most freq MC labels
97 fLabels[2]=0; // number of different labels for tracklet
98 fRefCov[0] = 1.; fRefCov[1] = 0.; fRefCov[2] = 1.;
99 // covariance matrix [diagonal]
100 // default sy = 200um and sz = 2.3 cm
101 fCov[0] = 4.e-4; fCov[1] = 0.; fCov[2] = 5.3;
102 SetStandAlone(kFALSE);
105 //____________________________________________________________________
106 AliTRDseedV1::AliTRDseedV1(const AliTRDseedV1 &ref)
107 :TObject((TObject&)ref)
135 // Copy Constructor performing a deep copy
140 SetBit(kOwner, kFALSE);
141 SetStandAlone(ref.IsStandAlone());
145 //____________________________________________________________________
146 AliTRDseedV1& AliTRDseedV1::operator=(const AliTRDseedV1 &ref)
149 // Assignment Operator using the copy function
155 SetBit(kOwner, kFALSE);
160 //____________________________________________________________________
161 AliTRDseedV1::~AliTRDseedV1()
164 // Destructor. The RecoParam object belongs to the underlying tracker.
167 //printf("I-AliTRDseedV1::~AliTRDseedV1() : Owner[%s]\n", IsOwner()?"YES":"NO");
170 for(int itb=0; itb<kNTimeBins; itb++){
171 if(!fClusters[itb]) continue;
172 //AliInfo(Form("deleting c %p @ %d", fClusters[itb], itb));
173 delete fClusters[itb];
174 fClusters[itb] = 0x0;
179 //____________________________________________________________________
180 void AliTRDseedV1::Copy(TObject &ref) const
187 AliTRDseedV1 &target = (AliTRDseedV1 &)ref;
189 target.fReconstructor = fReconstructor;
190 target.fClusterIter = 0x0;
194 target.fS2PRF = fS2PRF;
195 target.fDiffL = fDiffL;
196 target.fDiffT = fDiffT;
197 target.fClusterIdx = 0;
198 // target.fUsable = fUsable;
200 target.fNUsed = fNUsed;
202 target.fTilt = fTilt;
203 target.fPadLength = fPadLength;
213 target.fChi2 = fChi2;
215 memcpy(target.fIndexes, fIndexes, kNTimeBins*sizeof(Int_t));
216 memcpy(target.fClusters, fClusters, kNTimeBins*sizeof(AliTRDcluster*));
217 target.fYref[0] = fYref[0]; target.fYref[1] = fYref[1];
218 target.fZref[0] = fZref[0]; target.fZref[1] = fZref[1];
219 target.fYfit[0] = fYfit[0]; target.fYfit[1] = fYfit[1];
220 target.fZfit[0] = fZfit[0]; target.fZfit[1] = fZfit[1];
221 memcpy(target.fdEdx, fdEdx, kNSlices*sizeof(Float_t));
222 memcpy(target.fProb, fProb, AliPID::kSPECIES*sizeof(Float_t));
223 memcpy(target.fLabels, fLabels, 3*sizeof(Int_t));
224 memcpy(target.fRefCov, fRefCov, 3*sizeof(Double_t));
225 memcpy(target.fCov, fCov, 3*sizeof(Double_t));
231 //____________________________________________________________
232 Bool_t AliTRDseedV1::Init(AliTRDtrackV1 *track)
234 // Initialize this tracklet using the track information
237 // track - the TRD track used to initialize the tracklet
239 // Detailed description
240 // The function sets the starting point and direction of the
241 // tracklet according to the information from the TRD track.
244 // The TRD track has to be propagated to the beginning of the
245 // chamber where the tracklet will be constructed
249 if(!track->GetProlongation(fX0, y, z)) return kFALSE;
255 //_____________________________________________________________________________
256 void AliTRDseedV1::Reset()
261 fExB=0.;fVD=0.;fT0=0.;fS2PRF=0.;
263 fClusterIdx=0;//fUsable=0;
265 fDet=-1;fTilt=0.;fPadLength=0.;
267 fdX=0.;fX0=0.; fX=0.; fY=0.; fZ=0.;
271 for(Int_t ic=kNTimeBins; ic--;) fIndexes[ic] = -1;
272 memset(fClusters, 0, kNTimeBins*sizeof(AliTRDcluster*));
273 fYref[0] = 0.; fYref[1] = 0.;
274 fZref[0] = 0.; fZref[1] = 0.;
275 fYfit[0] = 0.; fYfit[1] = 0.;
276 fZfit[0] = 0.; fZfit[1] = 0.;
277 memset(fdEdx, 0, kNSlices*sizeof(Float_t));
278 for(int ispec=0; ispec<AliPID::kSPECIES; ispec++) fProb[ispec] = -1.;
279 fLabels[0]=-1; fLabels[1]=-1; // most freq MC labels
280 fLabels[2]=0; // number of different labels for tracklet
281 fRefCov[0] = 1.; fRefCov[1] = 0.; fRefCov[2] = 1.;
282 // covariance matrix [diagonal]
283 // default sy = 200um and sz = 2.3 cm
284 fCov[0] = 4.e-4; fCov[1] = 0.; fCov[2] = 5.3;
287 //____________________________________________________________________
288 void AliTRDseedV1::UpDate(const AliTRDtrackV1 *trk)
290 // update tracklet reference position from the TRD track
291 // Funny name to avoid the clash with the function AliTRDseed::Update() (has to be made obselete)
293 Double_t fSnp = trk->GetSnp();
294 Double_t fTgl = trk->GetTgl();
296 fYref[1] = fSnp/(1. - fSnp*fSnp);
298 SetCovRef(trk->GetCovariance());
300 Double_t dx = trk->GetX() - fX0;
301 fYref[0] = trk->GetY() - dx*fYref[1];
302 fZref[0] = trk->GetZ() - dx*fZref[1];
305 //_____________________________________________________________________________
306 void AliTRDseedV1::UpdateUsed()
309 // Calculate number of used clusers in the tracklet
313 for (Int_t i = kNTimeBins; i--; ) {
314 if (!fClusters[i]) continue;
315 if(fClusters[i]->IsUsed()) fNUsed++;
316 else if(fClusters[i]->IsShared() && IsStandAlone()) fNUsed++;
320 //_____________________________________________________________________________
321 void AliTRDseedV1::UseClusters()
326 // In stand alone mode:
327 // Clusters which are marked as used or shared from another track are
328 // removed from the tracklet
331 // - Clusters which are used by another track become shared
332 // - Clusters which are attached to a kink track become shared
334 AliTRDcluster **c = &fClusters[0];
335 for (Int_t ic=kNTimeBins; ic--; c++) {
338 if((*c)->IsShared() || (*c)->IsUsed()){
346 if((*c)->IsUsed() || IsKink()){
357 //____________________________________________________________________
358 void AliTRDseedV1::CookdEdx(Int_t nslices)
360 // Calculates average dE/dx for all slices and store them in the internal array fdEdx.
363 // nslices : number of slices for which dE/dx should be calculated
365 // store results in the internal array fdEdx. This can be accessed with the method
366 // AliTRDseedV1::GetdEdx()
368 // Detailed description
369 // Calculates average dE/dx for all slices. Depending on the PID methode
370 // the number of slices can be 3 (LQ) or 8(NN).
371 // The calculation of dQ/dl are done using the tracklet fit results (see AliTRDseedV1::GetdQdl(Int_t))
373 // The following effects are included in the calculation:
374 // 1. calibration values for t0 and vdrift (using x coordinate to calculate slice)
375 // 2. cluster sharing (optional see AliTRDrecoParam::SetClusterSharing())
379 Int_t nclusters[kNSlices];
380 memset(nclusters, 0, kNSlices*sizeof(Int_t));
381 memset(fdEdx, 0, kNSlices*sizeof(Float_t));
383 const Double_t kDriftLength = (.5 * AliTRDgeometry::AmThick() + AliTRDgeometry::DrThick());
385 AliTRDcluster *c = 0x0;
386 for(int ic=0; ic<AliTRDtrackerV1::GetNTimeBins(); ic++){
387 if(!(c = fClusters[ic]) && !(c = fClusters[ic+kNtb])) continue;
388 Float_t dx = TMath::Abs(fX0 - c->GetX());
390 // Filter clusters for dE/dx calculation
392 // 1.consider calibration effects for slice determination
394 if(dx<kDriftLength){ // TODO should be replaced by c->IsInChamber()
395 slice = Int_t(dx * nslices / kDriftLength);
396 } else slice = c->GetX() < fX0 ? nslices-1 : 0;
399 // 2. take sharing into account
400 Float_t w = c->IsShared() ? .5 : 1.;
402 // 3. take into account large clusters TODO
403 //w *= c->GetNPads() > 3 ? .8 : 1.;
406 fdEdx[slice] += w * GetdQdl(ic); //fdQdl[ic];
408 } // End of loop over clusters
410 //if(fReconstructor->GetPIDMethod() == AliTRDReconstructor::kLQPID){
411 if(nslices == AliTRDpidUtil::kLQslices){
412 // calculate mean charge per slice (only LQ PID)
413 for(int is=0; is<nslices; is++){
414 if(nclusters[is]) fdEdx[is] /= nclusters[is];
419 //_____________________________________________________________________________
420 void AliTRDseedV1::CookLabels()
423 // Cook 2 labels for seed
429 for (Int_t i = 0; i < kNTimeBins; i++) {
430 if (!fClusters[i]) continue;
431 for (Int_t ilab = 0; ilab < 3; ilab++) {
432 if (fClusters[i]->GetLabel(ilab) >= 0) {
433 labels[nlab] = fClusters[i]->GetLabel(ilab);
439 fLabels[2] = AliMathBase::Freq(nlab,labels,out,kTRUE);
441 if ((fLabels[2] > 1) && (out[3] > 1)) fLabels[1] = out[2];
445 //____________________________________________________________________
446 void AliTRDseedV1::GetClusterXY(const AliTRDcluster *c, Double_t &x, Double_t &y)
448 // Return corrected position of the cluster taking into
449 // account variation of the drift velocity with drift length.
452 // drift velocity correction TODO to be moved to the clusterizer
453 const Float_t cx[] = {
454 -9.6280e-02, 1.3091e-01,-1.7415e-02,-9.9221e-02,-1.2040e-01,-9.5493e-02,
455 -5.0041e-02,-1.6726e-02, 3.5756e-03, 1.8611e-02, 2.6378e-02, 3.3823e-02,
456 3.4811e-02, 3.5282e-02, 3.5386e-02, 3.6047e-02, 3.5201e-02, 3.4384e-02,
457 3.2864e-02, 3.1932e-02, 3.2051e-02, 2.2539e-02,-2.5154e-02,-1.2050e-01,
461 // PRF correction TODO to be replaced by the gaussian
462 // approximation with full error parametrization and // moved to the clusterizer
463 const Float_t cy[AliTRDgeometry::kNlayer][3] = {
464 { 4.014e-04, 8.605e-03, -6.880e+00},
465 {-3.061e-04, 9.663e-03, -6.789e+00},
466 { 1.124e-03, 1.105e-02, -6.825e+00},
467 {-1.527e-03, 1.231e-02, -6.777e+00},
468 { 2.150e-03, 1.387e-02, -6.783e+00},
469 {-1.296e-03, 1.486e-02, -6.825e+00}
472 Int_t ily = AliTRDgeometry::GetLayer(c->GetDetector());
473 x = c->GetX() - cx[c->GetLocalTimeBin()];
474 y = c->GetY() + cy[ily][0] + cy[ily][1] * TMath::Sin(cy[ily][2] * c->GetCenter());
478 //____________________________________________________________________
479 Float_t AliTRDseedV1::GetdQdl(Int_t ic) const
481 // Using the linear approximation of the track inside one TRD chamber (TRD tracklet)
482 // the charge per unit length can be written as:
484 // #frac{dq}{dl} = #frac{q_{c}}{dx * #sqrt{1 + #(){#frac{dy}{dx}}^{2}_{fit} + #(){#frac{dy}{dx}}^{2}_{ref}}}
486 // where qc is the total charge collected in the current time bin and dx is the length
487 // of the time bin. For the moment (Jan 20 2009) only pad row cross corrections are
488 // considered for the charge but none are applied for drift velocity variations along
489 // the drift region or assymetry of the TRF
491 // Author : Alex Bercuci <A.Bercuci@gsi.de>
494 if(fClusters[ic]) dq += TMath::Abs(fClusters[ic]->GetQ());
495 if(fClusters[ic+kNtb]) dq += TMath::Abs(fClusters[ic+kNtb]->GetQ());
496 if(dq<1.e-3 || fdX < 1.e-3) return 0.;
498 return dq/fdX/TMath::Sqrt(1. + fYfit[1]*fYfit[1] + fZref[1]*fZref[1]);
501 //____________________________________________________________________
502 Float_t* AliTRDseedV1::GetProbability()
504 // Fill probability array for tracklet from the DB.
509 // returns pointer to the probability array and 0x0 if missing DB access
511 // Detailed description
514 // retrive calibration db
515 AliTRDcalibDB *calibration = AliTRDcalibDB::Instance();
517 AliError("No access to calibration data");
521 if (!fReconstructor) {
522 AliError("Reconstructor not set.");
526 // Retrieve the CDB container class with the parametric detector response
527 const AliTRDCalPID *pd = calibration->GetPIDObject(fReconstructor->GetPIDMethod());
529 AliError("No access to AliTRDCalPID object");
532 //AliInfo(Form("Method[%d] : %s", fReconstructor->GetRecoParam() ->GetPIDMethod(), pd->IsA()->GetName()));
534 // calculate tracklet length TO DO
535 Float_t length = (AliTRDgeometry::AmThick() + AliTRDgeometry::DrThick());
536 /// TMath::Sqrt((1.0 - fSnp[iPlane]*fSnp[iPlane]) / (1.0 + fTgl[iPlane]*fTgl[iPlane]));
539 CookdEdx(fReconstructor->GetNdEdxSlices());
541 // Sets the a priori probabilities
542 for(int ispec=0; ispec<AliPID::kSPECIES; ispec++) {
543 fProb[ispec] = pd->GetProbability(ispec, fMom, &fdEdx[0], length, GetPlane());
549 //____________________________________________________________________
550 Float_t AliTRDseedV1::GetQuality(Bool_t kZcorr) const
553 // Returns a quality measurement of the current seed
556 Float_t zcorr = kZcorr ? fTilt * (fZfit[0] - fZref[0]) : 0.;
558 .5 * TMath::Abs(18.0 - fN2)
559 + 10.* TMath::Abs(fYfit[1] - fYref[1])
560 + 5. * TMath::Abs(fYfit[0] - fYref[0] + zcorr)
561 + 2. * TMath::Abs(fZfit[0] - fZref[0]) / fPadLength;
564 //____________________________________________________________________
565 void AliTRDseedV1::GetCovAt(Double_t x, Double_t *cov) const
567 // Computes covariance in the y-z plane at radial point x (in tracking coordinates)
568 // and returns the results in the preallocated array cov[3] as :
575 // For the linear transformation
579 // The error propagation has the general form
581 // C_{Y} = T_{x} C_{X} T_{x}^{T}
583 // We apply this formula 2 times. First to calculate the covariance of the tracklet
584 // at point x we consider:
586 // T_{x} = (1 x); X=(y0 dy/dx); C_{X}=#(){#splitline{Var(y0) Cov(y0, dy/dx)}{Cov(y0, dy/dx) Var(dy/dx)}}
588 // and secondly to take into account the tilt angle
590 // T_{#alpha} = #(){#splitline{cos(#alpha) __ sin(#alpha)}{-sin(#alpha) __ cos(#alpha)}}; X=(y z); C_{X}=#(){#splitline{Var(y) 0}{0 Var(z)}}
593 // using simple trigonometrics one can write for this last case
595 // C_{Y}=#frac{1}{1+tg^{2}#alpha} #(){#splitline{(#sigma_{y}^{2}+tg^{2}#alpha#sigma_{z}^{2}) __ tg#alpha(#sigma_{z}^{2}-#sigma_{y}^{2})}{tg#alpha(#sigma_{z}^{2}-#sigma_{y}^{2}) __ (#sigma_{z}^{2}+tg^{2}#alpha#sigma_{y}^{2})}}
597 // which can be aproximated for small alphas (2 deg) with
599 // C_{Y}=#(){#splitline{#sigma_{y}^{2} __ (#sigma_{z}^{2}-#sigma_{y}^{2})tg#alpha}{((#sigma_{z}^{2}-#sigma_{y}^{2})tg#alpha __ #sigma_{z}^{2}}}
602 // before applying the tilt rotation we also apply systematic uncertainties to the tracklet
603 // position which can be tunned from outside via the AliTRDrecoParam::SetSysCovMatrix(). They might
604 // account for extra misalignment/miscalibration uncertainties.
607 // Alex Bercuci <A.Bercuci@gsi.de>
608 // Date : Jan 8th 2009
613 Double_t sy2 = fCov[0] +2.*xr*fCov[1] + xr*xr*fCov[2];
614 Double_t sz2 = fPadLength*fPadLength/12.;
616 // insert systematic uncertainties
618 fReconstructor->GetRecoParam()->GetSysCovMatrix(sys);
622 // rotate covariance matrix
623 Double_t t2 = fTilt*fTilt;
624 Double_t correction = 1./(1. + t2);
625 cov[0] = (sy2+t2*sz2)*correction;
626 cov[1] = fTilt*(sz2 - sy2)*correction;
627 cov[2] = (t2*sy2+sz2)*correction;
631 //____________________________________________________________________
632 void AliTRDseedV1::Calibrate()
634 // Retrieve calibration and position parameters from OCDB.
635 // The following information are used
637 // - column and row position of first attached cluster. If no clusters are attached
638 // to the tracklet a random central chamber position (c=70, r=7) will be used.
640 // The following information is cached in the tracklet
641 // t0 (trigger delay)
644 // omega*tau = tg(a_L)
645 // diffusion coefficients (longitudinal and transversal)
648 // Alex Bercuci <A.Bercuci@gsi.de>
649 // Date : Jan 8th 2009
652 AliCDBManager *cdb = AliCDBManager::Instance();
653 if(cdb->GetRun() < 0){
654 AliError("OCDB manager not properly initialized");
658 AliTRDcalibDB *calib = AliTRDcalibDB::Instance();
659 AliTRDCalROC *vdROC = calib->GetVdriftROC(fDet),
660 *t0ROC = calib->GetT0ROC(fDet);;
661 const AliTRDCalDet *vdDet = calib->GetVdriftDet();
662 const AliTRDCalDet *t0Det = calib->GetT0Det();
664 Int_t col = 70, row = 7;
665 AliTRDcluster **c = &fClusters[0];
668 while (ic<kNTimeBins && !(*c)){ic++; c++;}
670 col = (*c)->GetPadCol();
671 row = (*c)->GetPadRow();
675 fT0 = t0Det->GetValue(fDet) + t0ROC->GetValue(col,row);
676 fVD = vdDet->GetValue(fDet) * vdROC->GetValue(col, row);
677 fS2PRF = calib->GetPRFWidth(fDet, col, row); fS2PRF *= fS2PRF;
678 fExB = AliTRDCommonParam::Instance()->GetOmegaTau(fVD);
679 AliTRDCommonParam::Instance()->GetDiffCoeff(fDiffL,
681 SetBit(kCalib, kTRUE);
684 //____________________________________________________________________
685 void AliTRDseedV1::SetOwner()
687 //AliInfo(Form("own [%s] fOwner[%s]", own?"YES":"NO", fOwner?"YES":"NO"));
689 if(TestBit(kOwner)) return;
690 for(int ic=0; ic<kNTimeBins; ic++){
691 if(!fClusters[ic]) continue;
692 fClusters[ic] = new AliTRDcluster(*fClusters[ic]);
697 // //____________________________________________________________________
698 // Bool_t AliTRDseedV1::AttachClustersIter(AliTRDtrackingChamber *chamber, Float_t quality, Bool_t kZcorr, AliTRDcluster *c)
701 // // Iterative process to register clusters to the seed.
702 // // In iteration 0 we try only one pad-row and if quality not
703 // // sufficient we try 2 pad-rows (about 5% of tracks cross 2 pad-rows)
708 // if(!fReconstructor->GetRecoParam() ){
709 // AliError("Seed can not be used without a valid RecoParam.");
713 // AliTRDchamberTimeBin *layer = 0x0;
714 // if(fReconstructor->GetStreamLevel(AliTRDReconstructor::kTracker)>=7){
715 // AliTRDtrackingChamber ch(*chamber);
717 // TTreeSRedirector &cstreamer = *fReconstructor->GetDebugStream(AliTRDReconstructor::kTracker);
718 // cstreamer << "AttachClustersIter"
719 // << "chamber.=" << &ch
720 // << "tracklet.=" << this
725 // Double_t kroady = fReconstructor->GetRecoParam() ->GetRoad1y();
726 // Double_t kroadz = fPadLength * .5 + 1.;
728 // // initialize configuration parameters
729 // Float_t zcorr = kZcorr ? fTilt * (fZfit[0] - fZref[0]) : 0.;
730 // Int_t niter = kZcorr ? 1 : 2;
732 // Double_t yexp, zexp;
734 // // start seed update
735 // for (Int_t iter = 0; iter < niter; iter++) {
737 // for (Int_t iTime = 0; iTime < AliTRDtrackerV1::GetNTimeBins(); iTime++) {
738 // if(!(layer = chamber->GetTB(iTime))) continue;
739 // if(!Int_t(*layer)) continue;
741 // // define searching configuration
742 // Double_t dxlayer = layer->GetX() - fX0;
745 // //Try 2 pad-rows in second iteration
747 // zexp = fZref[0] + fZref[1] * dxlayer - zcorr;
748 // if (zexp > c->GetZ()) zexp = c->GetZ() + fPadLength*0.5;
749 // if (zexp < c->GetZ()) zexp = c->GetZ() - fPadLength*0.5;
751 // } else zexp = fZref[0] + (kZcorr ? fZref[1] * dxlayer : 0.);
752 // yexp = fYref[0] + fYref[1] * dxlayer - zcorr;
754 // // Get and register cluster
755 // Int_t index = layer->SearchNearestCluster(yexp, zexp, kroady, kroadz);
756 // if (index < 0) continue;
757 // AliTRDcluster *cl = (*layer)[index];
759 // fIndexes[iTime] = layer->GetGlobalIndex(index);
760 // fClusters[iTime] = cl;
761 // // fY[iTime] = cl->GetY();
762 // // fZ[iTime] = cl->GetZ();
765 // if(fReconstructor->GetStreamLevel(AliTRDReconstructor::kTracker)>=7) AliInfo(Form("iter = %d ncl [%d] = %d", iter, fDet, ncl));
768 // // calculate length of the time bin (calibration aware)
769 // Int_t irp = 0; Float_t x[2]={0., 0.}; Int_t tb[2] = {0,0};
770 // for (Int_t iTime = 0; iTime < AliTRDtrackerV1::GetNTimeBins(); iTime++) {
771 // if(!fClusters[iTime]) continue;
772 // x[irp] = fClusters[iTime]->GetX();
777 // Int_t dtb = tb[1] - tb[0];
778 // fdX = dtb ? (x[0] - x[1]) / dtb : 0.15;
780 // // update X0 from the clusters (calibration/alignment aware)
781 // for (Int_t iTime = 0; iTime < AliTRDtrackerV1::GetNTimeBins(); iTime++) {
782 // if(!(layer = chamber->GetTB(iTime))) continue;
783 // if(!layer->IsT0()) continue;
784 // if(fClusters[iTime]){
785 // fX0 = fClusters[iTime]->GetX();
787 // } else { // we have to infere the position of the anode wire from the other clusters
788 // for (Int_t jTime = iTime+1; jTime < AliTRDtrackerV1::GetNTimeBins(); jTime++) {
789 // if(!fClusters[jTime]) continue;
790 // fX0 = fClusters[jTime]->GetX() + fdX * (jTime - iTime);
796 // // update YZ reference point
799 // // update x reference positions (calibration/alignment aware)
800 // // for (Int_t iTime = 0; iTime < AliTRDtrackerV1::GetNTimeBins(); iTime++) {
801 // // if(!fClusters[iTime]) continue;
802 // // fX[iTime] = fX0 - fClusters[iTime]->GetX();
807 // if(fReconstructor->GetStreamLevel(AliTRDReconstructor::kTracker)>=7) AliInfo(Form("iter = %d nclFit [%d] = %d", iter, fDet, fN2));
810 // tquality = GetQuality(kZcorr);
811 // if(tquality < quality) break;
812 // else quality = tquality;
816 // if (!IsOK()) return kFALSE;
818 // if(fReconstructor->GetStreamLevel(AliTRDReconstructor::kTracker)>=1) CookLabels();
820 // // load calibration params
826 //____________________________________________________________________
827 Bool_t AliTRDseedV1::AttachClusters(AliTRDtrackingChamber *chamber, Bool_t tilt)
830 // Projective algorithm to attach clusters to seeding tracklets
836 // Detailed description
837 // 1. Collapse x coordinate for the full detector plane
838 // 2. truncated mean on y (r-phi) direction
840 // 4. truncated mean on z direction
844 Bool_t kPRINT = kFALSE;
845 if(!fReconstructor->GetRecoParam() ){
846 AliError("Seed can not be used without a valid RecoParam.");
849 // Initialize reco params for this tracklet
850 // 1. first time bin in the drift region
852 Int_t kClmin = Int_t(fReconstructor->GetRecoParam() ->GetFindableClusters()*AliTRDtrackerV1::GetNTimeBins());
854 Double_t syRef = TMath::Sqrt(fRefCov[0]);
856 Double_t kroady = 1.;
857 //fReconstructor->GetRecoParam() ->GetRoad1y();
858 Double_t kroadz = fPadLength * 1.5 + 1.;
859 if(kPRINT) printf("AttachClusters() sy[%f] road[%f]\n", syRef, kroady);
862 const Int_t kNrows = 16;
863 AliTRDcluster *clst[kNrows][kNTimeBins];
864 Double_t cond[4], dx, dy, yt, zt,
865 yres[kNrows][kNTimeBins];
866 Int_t idxs[kNrows][kNTimeBins], ncl[kNrows], ncls = 0;
867 memset(ncl, 0, kNrows*sizeof(Int_t));
868 memset(clst, 0, kNrows*kNTimeBins*sizeof(AliTRDcluster*));
870 // Do cluster projection
871 AliTRDcluster *c = 0x0;
872 AliTRDchamberTimeBin *layer = 0x0;
873 Bool_t kBUFFER = kFALSE;
874 for (Int_t it = 0; it < AliTRDtrackerV1::GetNTimeBins(); it++) {
875 if(!(layer = chamber->GetTB(it))) continue;
876 if(!Int_t(*layer)) continue;
878 dx = fX0 - layer->GetX();
879 yt = fYref[0] - fYref[1] * dx;
880 zt = fZref[0] - fZref[1] * dx;
881 if(kPRINT) printf("\t%2d dx[%f] yt[%f] zt[%f]\n", it, dx, yt, zt);
883 // select clusters on a 5 sigmaKalman level
884 cond[0] = yt; cond[2] = kroady;
885 cond[1] = zt; cond[3] = kroadz;
887 layer->GetClusters(cond, idx, n, 6);
888 for(Int_t ic = n; ic--;){
889 c = (*layer)[idx[ic]];
891 dy += tilt ? fTilt * (c->GetZ() - zt) : 0.;
892 // select clusters on a 3 sigmaKalman level
893 /* if(tilt && TMath::Abs(dy) > 3.*syRef){
894 printf("too large !!!\n");
897 Int_t r = c->GetPadRow();
898 if(kPRINT) printf("\t\t%d dy[%f] yc[%f] r[%d]\n", ic, TMath::Abs(dy), c->GetY(), r);
900 idxs[r][ncl[r]] = idx[ic];
901 yres[r][ncl[r]] = dy;
904 if(ncl[r] >= kNTimeBins) {
905 AliWarning(Form("Cluster candidates reached limit %d. Some may be lost.", kNTimeBins));
912 if(kPRINT) printf("Found %d clusters\n", ncls);
913 if(ncls<kClmin) return kFALSE;
915 // analyze each row individualy
916 Double_t mean, syDis;
917 Int_t nrow[] = {0, 0, 0}, nr = 0, lr=-1;
918 for(Int_t ir=kNrows; ir--;){
919 if(!(ncl[ir])) continue;
920 if(lr>0 && lr-ir != 1){
921 if(kPRINT) printf("W - gap in rows attached !!\n");
923 if(kPRINT) printf("\tir[%d] lr[%d] n[%d]\n", ir, lr, ncl[ir]);
924 // Evaluate truncated mean on the y direction
925 if(ncl[ir] > 3) AliMathBase::EvaluateUni(ncl[ir], yres[ir], mean, syDis, Int_t(ncl[ir]*.8));
927 mean = 0.; syDis = 0.;
930 // TODO check mean and sigma agains cluster resolution !!
931 if(kPRINT) printf("\tr[%2d] m[%f %5.3fsigma] s[%f]\n", ir, mean, TMath::Abs(mean/syRef), syDis);
932 // select clusters on a 3 sigmaDistr level
933 Bool_t kFOUND = kFALSE;
934 for(Int_t ic = ncl[ir]; ic--;){
935 if(yres[ir][ic] - mean > 3. * syDis){
936 clst[ir][ic] = 0x0; continue;
938 nrow[nr]++; kFOUND = kTRUE;
942 lr = ir; if(nr>=3) break;
944 if(kPRINT) printf("lr[%d] nr[%d] nrow[0]=%d nrow[1]=%d nrow[2]=%d\n", lr, nr, nrow[0], nrow[1], nrow[2]);
946 // classify cluster rows
953 SetBit(kRowCross, kTRUE); // mark pad row crossing
954 if(nrow[0] > nrow[1]){ row = lr+1; lr = -1;}
963 SetBit(kRowCross, kTRUE); // mark pad row crossing
966 if(kPRINT) printf("\trow[%d] n[%d]\n\n", row, nrow[0]);
967 if(row<0) return kFALSE;
969 // Select and store clusters
970 // We should consider here :
971 // 1. How far is the chamber boundary
972 // 2. How big is the mean
974 for (Int_t ir = 0; ir < nr; ir++) {
975 Int_t jr = row + ir*lr;
976 if(kPRINT) printf("\tattach %d clusters for row %d\n", ncl[jr], jr);
977 for (Int_t ic = 0; ic < ncl[jr]; ic++) {
978 if(!(c = clst[jr][ic])) continue;
979 Int_t it = c->GetPadTime();
980 // TODO proper indexing of clusters !!
981 fIndexes[it+kNtb*ir] = chamber->GetTB(it)->GetGlobalIndex(idxs[jr][ic]);
982 fClusters[it+kNtb*ir] = c;
984 //printf("\tid[%2d] it[%d] idx[%d]\n", ic, it, fIndexes[it]);
990 // number of minimum numbers of clusters expected for the tracklet
992 AliWarning(Form("Not enough clusters to fit the tracklet %d [%d].", fN2, kClmin));
997 // Load calibration parameters for this tracklet
1000 // calculate dx for time bins in the drift region (calibration aware)
1001 Int_t irp = 0; Float_t x[2] = {0.,0.}; Int_t tb[2]={0,0};
1002 for (Int_t it = t0; it < AliTRDtrackerV1::GetNTimeBins(); it++) {
1003 if(!fClusters[it]) continue;
1004 x[irp] = fClusters[it]->GetX();
1009 Int_t dtb = tb[1] - tb[0];
1010 fdX = dtb ? (x[0] - x[1]) / dtb : 0.15;
1012 // update X0 from the clusters (calibration/alignment aware) TODO remove dependence on x0 !!
1013 for (Int_t it = 0; it < AliTRDtrackerV1::GetNTimeBins(); it++) {
1014 if(!(layer = chamber->GetTB(it))) continue;
1015 if(!layer->IsT0()) continue;
1017 fX0 = fClusters[it]->GetX();
1019 } else { // we have to infere the position of the anode wire from the other clusters
1020 for (Int_t jt = it+1; jt < AliTRDtrackerV1::GetNTimeBins(); jt++) {
1021 if(!fClusters[jt]) continue;
1022 fX0 = fClusters[jt]->GetX() + fdX * (jt - it);
1031 //____________________________________________________________
1032 void AliTRDseedV1::Bootstrap(const AliTRDReconstructor *rec)
1034 // Fill in all derived information. It has to be called after recovery from file or HLT.
1035 // The primitive data are
1036 // - list of clusters
1037 // - detector (as the detector will be removed from clusters)
1038 // - position of anode wire (fX0) - temporary
1039 // - track reference position and direction
1040 // - momentum of the track
1041 // - time bin length [cm]
1043 // A.Bercuci <A.Bercuci@gsi.de> Oct 30th 2008
1045 fReconstructor = rec;
1047 AliTRDpadPlane *pp = g.GetPadPlane(fDet);
1048 fTilt = TMath::Tan(TMath::DegToRad()*pp->GetTiltingAngle());
1049 fPadLength = pp->GetLengthIPad();
1050 //fSnp = fYref[1]/TMath::Sqrt(1+fYref[1]*fYref[1]);
1052 fN2 = 0;// fMPads = 0.;
1053 AliTRDcluster **cit = &fClusters[0];
1054 for(Int_t ic = kNTimeBins; ic--; cit++){
1057 /* fX[ic] = (*cit)->GetX() - fX0;
1058 fY[ic] = (*cit)->GetY();
1059 fZ[ic] = (*cit)->GetZ();*/
1068 //____________________________________________________________________
1069 Bool_t AliTRDseedV1::Fit(Bool_t tilt, Int_t errors)
1072 // Linear fit of the tracklet
1077 // True if successful
1079 // Detailed description
1080 // 2. Check if tracklet crosses pad row boundary
1081 // 1. Calculate residuals in the y (r-phi) direction
1082 // 3. Do a Least Square Fit to the data
1085 if(!IsCalibrated()){
1086 AliWarning("Tracklet fit failed. Call Calibrate().");
1090 const Int_t kClmin = 8;
1093 // cluster error parametrization parameters
1094 // 1. sy total charge
1095 const Float_t sq0inv = 0.019962; // [1/q0]
1096 const Float_t sqb = 1.0281564; //[cm]
1097 // 2. sy for the PRF
1098 const Float_t scy[AliTRDgeometry::kNlayer][4] = {
1099 {2.827e-02, 9.600e-04, 4.296e-01, 2.271e-02},
1100 {2.952e-02,-2.198e-04, 4.146e-01, 2.339e-02},
1101 {3.090e-02, 1.514e-03, 4.020e-01, 2.402e-02},
1102 {3.260e-02,-2.037e-03, 3.946e-01, 2.509e-02},
1103 {3.439e-02,-3.601e-04, 3.883e-01, 2.623e-02},
1104 {3.510e-02, 2.066e-03, 3.651e-01, 2.588e-02},
1106 // 3. sy parallel to the track
1107 const Float_t sy0 = 2.649e-02; // [cm]
1108 const Float_t sya = -8.864e-04; // [cm]
1109 const Float_t syb = -2.435e-01; // [cm]
1111 // 4. sx parallel to the track
1112 const Float_t sxgc = 5.427e-02;
1113 const Float_t sxgm = 7.783e-01;
1114 const Float_t sxgs = 2.743e-01;
1115 const Float_t sxe0 =-2.065e+00;
1116 const Float_t sxe1 =-2.978e-02;
1118 // 5. sx perpendicular to the track
1119 // const Float_t sxd0 = 1.881e-02;
1120 // const Float_t sxd1 =-4.101e-01;
1121 // const Float_t sxd2 = 1.572e+00;
1123 // get track direction
1124 Double_t y0 = fYref[0];
1125 Double_t dydx = fYref[1];
1126 Double_t z0 = fZref[0];
1127 Double_t dzdx = fZref[1];
1130 const Int_t kNtb = AliTRDtrackerV1::GetNTimeBins();
1131 // calculation of tg^2(phi - a_L) and tg^2(a_L)
1132 Double_t tgg = (dydx-fExB)/(1.+dydx*fExB); tgg *= tgg;
1133 //Double_t exb2= fExB*fExB;
1135 //AliTRDtrackerV1::AliTRDLeastSquare fitterZ;
1136 TLinearFitter fitterY(1, "pol1");
1137 // convertion factor from square to gauss distribution for sigma
1138 //Double_t convert = 1./TMath::Sqrt(12.);
1140 // book cluster information
1141 Double_t qc[kNTimeBins], xc[kNTimeBins], yc[kNTimeBins], zc[kNTimeBins], sy[kNTimeBins];
1143 Int_t ily = AliTRDgeometry::GetLayer(fDet);
1145 AliTRDcluster *c=0x0, **jc = &fClusters[0];
1146 for (Int_t ic=0; ic<kNtb; ic++, ++jc) {
1153 if(!(c = (*jc))) continue;
1154 if(!c->IsInChamber()) continue;
1157 if(c->GetNPads()>4) w = .5;
1158 if(c->GetNPads()>5) w = .2;
1160 //zRow[fN] = c->GetPadRow();
1161 qc[fN] = TMath::Abs(c->GetQ());
1162 // correct cluster position for PRF and v drift
1163 //Int_t jc = TMath::Max(fN-3, 0);
1164 //xc[fN] = c->GetXloc(fT0, fVD, &qc[jc], &xc[jc]/*, z0 - c->GetX()*dzdx*/);
1165 //Double_t s2 = fS2PRF + fDiffL*fDiffL*xc[fN]/(1.+2.*exb2)+tgg*xc[fN]*xc[fN]*exb2/12.;
1166 //yc[fN] = c->GetYloc(s2, fPadLength, xc[fN], fExB);
1168 // uncalibrated cluster correction
1170 Double_t x, y; GetClusterXY(c, x, y);
1175 // extrapolated y value for the track
1176 yt = y0 - xc[fN]*dydx;
1177 // extrapolated z value for the track
1178 zt = z0 - xc[fN]*dzdx;
1180 if(tilt) yc[fN] -= fTilt*(zc[fN] - zt);
1182 // ELABORATE CLUSTER ERROR
1183 // TODO to be moved to AliTRDcluster
1184 // basic y error (|| to track).
1185 sy[fN] = xc[fN] < AliTRDgeometry::CamHght() ? 2. : sy0 + sya*TMath::Exp(1./(xc[fN]+syb));
1186 //printf("cluster[%d]\n\tsy[0] = %5.3e [um]\n", fN, sy[fN]*1.e4);
1187 // y error due to total charge
1188 sy[fN] += sqb*(1./qc[fN] - sq0inv);
1189 //printf("\tsy[1] = %5.3e [um]\n", sy[fN]*1.e4);
1190 // y error due to PRF
1191 sy[fN] += scy[ily][0]*TMath::Gaus(c->GetCenter(), scy[ily][1], scy[ily][2]) - scy[ily][3];
1192 //printf("\tsy[2] = %5.3e [um]\n", sy[fN]*1.e4);
1197 // error of drift length parallel to the track
1198 Double_t sx = sxgc*TMath::Gaus(xc[fN], sxgm, sxgs) + TMath::Exp(sxe0+sxe1*xc[fN]); // [cm]
1199 //printf("\tsx[0] = %5.3e [um]\n", sx*1.e4);
1200 // error of drift length perpendicular to the track
1201 //sx += sxd0 + sxd1*d + sxd2*d*d;
1202 sx *= sx; // square sx
1204 // add error from ExB
1205 if(errors>0) sy[fN] += fExB*fExB*sx;
1206 //printf("\tsy[3] = %5.3e [um^2]\n", sy[fN]*1.e8);
1208 // global radial error due to misalignment/miscalibration
1209 Double_t sx0 = 0.; sx0 *= sx0;
1210 // add sx contribution to sy due to track angle
1211 if(errors>1) sy[fN] += tgg*(sx+sx0);
1212 // TODO we should add tilt pad correction here
1213 //printf("\tsy[4] = %5.3e [um^2]\n", sy[fN]*1.e8);
1214 c->SetSigmaY2(sy[fN]);
1216 sy[fN] = TMath::Sqrt(sy[fN]);
1217 fitterY.AddPoint(&xc[fN], yc[fN], sy[fN]);
1221 if (fN < kClmin) return kFALSE;
1225 fYfit[0] = fitterY.GetParameter(0);
1226 fYfit[1] = -fitterY.GetParameter(1);
1228 Double_t *p = fitterY.GetCovarianceMatrix();
1229 fCov[0] = p[0]; // variance of y0
1230 fCov[1] = p[1]; // covariance of y0, dydx
1231 fCov[2] = p[3]; // variance of dydx
1232 // the ref radial position is set at the minimum of
1233 // the y variance of the tracklet
1234 fX = -fCov[1]/fCov[2]; //fXref = fX0 - fXref;
1235 fS2Y = fCov[0] +2.*fX*fCov[1] + fX*fX*fCov[2];
1239 // TODO pad row cross position estimation !!!
1240 //AliInfo(Form("Padrow cross in detector %d", fDet));
1241 fZfit[0] = .5*(zc[0]+zc[fN-1]); fZfit[1] = 0.;
1242 fS2Z = 0.02+1.55*fZref[1]; fS2Z *= fS2Z;
1244 fZfit[0] = zc[0]; fZfit[1] = 0.;
1245 fS2Z = fPadLength*fPadLength/12.;
1249 // // determine z offset of the fit
1250 // Float_t zslope = 0.;
1251 // Int_t nchanges = 0, nCross = 0;
1252 // if(nz==2){ // tracklet is crossing pad row
1253 // // Find the break time allowing one chage on pad-rows
1254 // // with maximal number of accepted clusters
1255 // Int_t padRef = zRow[0];
1256 // for (Int_t ic=1; ic<fN; ic++) {
1257 // if(zRow[ic] == padRef) continue;
1260 // if(zRow[ic-1] == zRow[ic]){
1261 // printf("ERROR in pad row change!!!\n");
1264 // // evaluate parameters of the crossing point
1265 // Float_t sx = (xc[ic-1] - xc[ic])*convert;
1266 // fCross[0] = .5 * (xc[ic-1] + xc[ic]);
1267 // fCross[2] = .5 * (zc[ic-1] + zc[ic]);
1268 // fCross[3] = TMath::Max(dzdx * sx, .01);
1269 // zslope = zc[ic-1] > zc[ic] ? 1. : -1.;
1270 // padRef = zRow[ic];
1276 // // condition on nCross and reset nchanges TODO
1279 // if(dzdx * zslope < 0.){
1280 // AliInfo("Tracklet-Track mismatch in dzdx. TODO.");
1284 // //zc[nc] = fitterZ.GetFunctionParameter(0);
1285 // fCross[1] = fYfit[0] - fCross[0] * fYfit[1];
1286 // fCross[0] = fX0 - fCross[0];
1294 //_____________________________________________________________________________
1295 void AliTRDseedV1::FitMI()
1299 // Marian Ivanov's version
1301 // linear fit on the y direction with respect to the reference direction.
1302 // The residuals for each x (x = xc - x0) are deduced from:
1304 // the tilting correction is written :
1305 // y = yc + h*(zc-zt) (2)
1306 // yt = y0+dy/dx*x (3)
1307 // zt = z0+dz/dx*x (4)
1308 // from (1),(2),(3) and (4)
1309 // dy = yc - y0 - (dy/dx + h*dz/dx)*x + h*(zc-z0)
1310 // the last term introduces the correction on y direction due to tilting pads. There are 2 ways to account for this:
1311 // 1. use tilting correction for calculating the y
1312 // 2. neglect tilting correction here and account for it in the error parametrization of the tracklet.
1313 const Float_t kRatio = 0.8;
1314 const Int_t kClmin = 5;
1315 const Float_t kmaxtan = 2;
1317 if (TMath::Abs(fYref[1]) > kmaxtan){
1318 //printf("Exit: Abs(fYref[1]) = %3.3f, kmaxtan = %3.3f\n", TMath::Abs(fYref[1]), kmaxtan);
1319 return; // Track inclined too much
1322 Float_t sigmaexp = 0.05 + TMath::Abs(fYref[1] * 0.25); // Expected r.m.s in y direction
1323 Float_t ycrosscor = fPadLength * fTilt * 0.5; // Y correction for crossing
1334 // Buffering: Leave it constant fot Performance issues
1335 Int_t zints[kNtb]; // Histograming of the z coordinate
1336 // Get 1 and second max probable coodinates in z
1337 Int_t zouts[2*kNtb];
1338 Float_t allowedz[kNtb]; // Allowed z for given time bin
1339 Float_t yres[kNtb]; // Residuals from reference
1340 //Float_t anglecor = fTilt * fZref[1]; // Correction to the angle
1342 Float_t pos[3*kNtb]; memset(pos, 0, 3*kNtb*sizeof(Float_t));
1343 Float_t *fX = &pos[0], *fY = &pos[kNtb], *fZ = &pos[2*kNtb];
1345 Int_t fN = 0; AliTRDcluster *c = 0x0;
1347 for (Int_t i = 0; i < AliTRDtrackerV1::GetNTimeBins(); i++) {
1349 if (!(c = fClusters[i])) continue;
1350 if(!c->IsInChamber()) continue;
1352 //yres[i] = fY[i] - fYref[0] - (fYref[1] + anglecor) * fX[i] + fTilt*(fZ[i] - fZref[0]);
1353 fX[i] = fX0 - c->GetX();
1356 yres[i] = fY[i] - fTilt*(fZ[i] - (fZref[0] - fX[i]*fZref[1]));
1357 zints[fN] = Int_t(fZ[i]);
1362 //printf("Exit fN < kClmin: fN = %d\n", fN);
1365 Int_t nz = AliTRDtrackerV1::Freq(fN, zints, zouts, kFALSE);
1366 Float_t fZProb = zouts[0];
1367 if (nz <= 1) zouts[3] = 0;
1368 if (zouts[1] + zouts[3] < kClmin) {
1369 //printf("Exit zouts[1] = %d, zouts[3] = %d\n",zouts[1],zouts[3]);
1373 // Z distance bigger than pad - length
1374 if (TMath::Abs(zouts[0]-zouts[2]) > 12.0) zouts[3] = 0;
1376 Int_t breaktime = -1;
1377 Bool_t mbefore = kFALSE;
1378 Int_t cumul[kNtb][2];
1379 Int_t counts[2] = { 0, 0 };
1381 if (zouts[3] >= 3) {
1384 // Find the break time allowing one chage on pad-rows
1385 // with maximal number of accepted clusters
1388 for (Int_t i = 0; i < AliTRDtrackerV1::GetNTimeBins(); i++) {
1389 cumul[i][0] = counts[0];
1390 cumul[i][1] = counts[1];
1391 if (TMath::Abs(fZ[i]-zouts[0]) < 2) counts[0]++;
1392 if (TMath::Abs(fZ[i]-zouts[2]) < 2) counts[1]++;
1395 for (Int_t i = 0; i < AliTRDtrackerV1::GetNTimeBins(); i++) {
1396 Int_t after = cumul[AliTRDtrackerV1::GetNTimeBins()][0] - cumul[i][0];
1397 Int_t before = cumul[i][1];
1398 if (after + before > maxcount) {
1399 maxcount = after + before;
1403 after = cumul[AliTRDtrackerV1::GetNTimeBins()-1][1] - cumul[i][1];
1404 before = cumul[i][0];
1405 if (after + before > maxcount) {
1406 maxcount = after + before;
1414 for (Int_t i = 0; i < AliTRDtrackerV1::GetNTimeBins()+1; i++) {
1415 if (i > breaktime) allowedz[i] = mbefore ? zouts[2] : zouts[0];
1416 if (i <= breaktime) allowedz[i] = (!mbefore) ? zouts[2] : zouts[0];
1419 if (((allowedz[0] > allowedz[AliTRDtrackerV1::GetNTimeBins()]) && (fZref[1] < 0)) ||
1420 ((allowedz[0] < allowedz[AliTRDtrackerV1::GetNTimeBins()]) && (fZref[1] > 0))) {
1422 // Tracklet z-direction not in correspondance with track z direction
1425 for (Int_t i = 0; i < AliTRDtrackerV1::GetNTimeBins()+1; i++) {
1426 allowedz[i] = zouts[0]; // Only longest taken
1432 // Cross pad -row tracklet - take the step change into account
1434 for (Int_t i = 0; i < AliTRDtrackerV1::GetNTimeBins()+1; i++) {
1435 if (!fClusters[i]) continue;
1436 if(!fClusters[i]->IsInChamber()) continue;
1437 if (TMath::Abs(fZ[i] - allowedz[i]) > 2) continue;
1439 //yres[i] = fY[i] - fYref[0] - (fYref[1] + anglecor) * fX[i] + fTilt*(fZ[i] - fZref[0]);
1440 yres[i] = fY[i] - fTilt*(fZ[i] - (fZref[0] - fX[i]*fZref[1]));
1441 // if (TMath::Abs(fZ[i] - fZProb) > 2) {
1442 // if (fZ[i] > fZProb) yres[i] += fTilt * fPadLength;
1443 // if (fZ[i] < fZProb) yres[i] -= fTilt * fPadLength;
1448 Double_t yres2[kNtb];
1451 for (Int_t i = 0; i < AliTRDtrackerV1::GetNTimeBins()+1; i++) {
1452 if (!fClusters[i]) continue;
1453 if(!fClusters[i]->IsInChamber()) continue;
1454 if (TMath::Abs(fZ[i] - allowedz[i]) > 2) continue;
1455 yres2[fN2] = yres[i];
1459 //printf("Exit fN2 < kClmin: fN2 = %d\n", fN2);
1463 AliMathBase::EvaluateUni(fN2,yres2,mean,sigma, Int_t(fN2*kRatio-2.));
1464 if (sigma < sigmaexp * 0.8) {
1467 //Float_t fSigmaY = sigma;
1482 for (Int_t i = 0; i < AliTRDtrackerV1::GetNTimeBins()+1; i++) {
1483 if (!fClusters[i]) continue;
1484 if (!fClusters[i]->IsInChamber()) continue;
1485 if (TMath::Abs(fZ[i] - allowedz[i]) > 2){fClusters[i] = 0x0; continue;}
1486 if (TMath::Abs(yres[i] - mean) > 4.0 * sigma){fClusters[i] = 0x0; continue;}
1489 fMPads += fClusters[i]->GetNPads();
1490 Float_t weight = 1.0;
1491 if (fClusters[i]->GetNPads() > 4) weight = 0.5;
1492 if (fClusters[i]->GetNPads() > 5) weight = 0.2;
1496 //printf("x = %7.3f dy = %7.3f fit %7.3f\n", x, yres[i], fY[i]-yres[i]);
1499 sumwx += x * weight;
1500 sumwx2 += x*x * weight;
1501 sumwy += weight * yres[i];
1502 sumwxy += weight * (yres[i]) * x;
1503 sumwz += weight * fZ[i];
1504 sumwxz += weight * fZ[i] * x;
1509 //printf("Exit fN2 < kClmin(2): fN2 = %d\n",fN2);
1513 fMeanz = sumwz / sumw;
1514 Float_t correction = 0;
1516 // Tracklet on boundary
1517 if (fMeanz < fZProb) correction = ycrosscor;
1518 if (fMeanz > fZProb) correction = -ycrosscor;
1521 Double_t det = sumw * sumwx2 - sumwx * sumwx;
1522 fYfit[0] = (sumwx2 * sumwy - sumwx * sumwxy) / det;
1523 fYfit[1] = (sumw * sumwxy - sumwx * sumwy) / det;
1526 for (Int_t i = 0; i < AliTRDtrackerV1::GetNTimeBins()+1; i++) {
1527 if (!TESTBIT(fUsable,i)) continue;
1528 Float_t delta = yres[i] - fYfit[0] - fYfit[1] * fX[i];
1529 fS2Y += delta*delta;
1531 fS2Y = TMath::Sqrt(fS2Y / Float_t(fN2-2));
1532 // TEMPORARY UNTIL covariance properly calculated
1533 fS2Y = TMath::Max(fS2Y, Float_t(.1));
1535 fZfit[0] = (sumwx2 * sumwz - sumwx * sumwxz) / det;
1536 fZfit[1] = (sumw * sumwxz - sumwx * sumwz) / det;
1537 // fYfitR[0] += fYref[0] + correction;
1538 // fYfitR[1] += fYref[1];
1539 // fYfit[0] = fYfitR[0];
1540 fYfit[1] = -fYfit[1];
1545 //___________________________________________________________________
1546 void AliTRDseedV1::Print(Option_t *o) const
1549 // Printing the seedstatus
1552 AliInfo(Form("Det[%3d] Tilt[%+6.2f] Pad[%5.2f]", fDet, fTilt, fPadLength));
1553 AliInfo(Form("N[%2d] ", fN2));
1554 AliInfo(Form("x[%7.2f] y[%7.2f] z[%7.2f] dydx[%5.2f] dzdx[%5.2f]", fX0, fYfit[0], fZfit[0], fYfit[1], fZfit[1]));
1555 AliInfo(Form("Ref y[%7.2f] z[%7.2f] dydx[%5.2f] dzdx[%5.2f]", fYref[0], fZref[0], fYref[1], fZref[1]))
1558 if(strcmp(o, "a")!=0) return;
1560 AliTRDcluster* const* jc = &fClusters[0];
1561 for(int ic=0; ic<kNTimeBins; ic++, jc++) {
1562 if(!(*jc)) continue;
1568 //___________________________________________________________________
1569 Bool_t AliTRDseedV1::IsEqual(const TObject *o) const
1571 // Checks if current instance of the class has the same essential members
1574 if(!o) return kFALSE;
1575 const AliTRDseedV1 *inTracklet = dynamic_cast<const AliTRDseedV1*>(o);
1576 if(!inTracklet) return kFALSE;
1578 for (Int_t i = 0; i < 2; i++){
1579 if ( fYref[i] != inTracklet->fYref[i] ) return kFALSE;
1580 if ( fZref[i] != inTracklet->fZref[i] ) return kFALSE;
1583 if ( fS2Y != inTracklet->fS2Y ) return kFALSE;
1584 if ( fTilt != inTracklet->fTilt ) return kFALSE;
1585 if ( fPadLength != inTracklet->fPadLength ) return kFALSE;
1587 for (Int_t i = 0; i < kNTimeBins; i++){
1588 // if ( fX[i] != inTracklet->GetX(i) ) return kFALSE;
1589 // if ( fY[i] != inTracklet->GetY(i) ) return kFALSE;
1590 // if ( fZ[i] != inTracklet->GetZ(i) ) return kFALSE;
1591 if ( fIndexes[i] != inTracklet->fIndexes[i] ) return kFALSE;
1593 // if ( fUsable != inTracklet->fUsable ) return kFALSE;
1595 for (Int_t i=0; i < 2; i++){
1596 if ( fYfit[i] != inTracklet->fYfit[i] ) return kFALSE;
1597 if ( fZfit[i] != inTracklet->fZfit[i] ) return kFALSE;
1598 if ( fLabels[i] != inTracklet->fLabels[i] ) return kFALSE;
1601 /* if ( fMeanz != inTracklet->GetMeanz() ) return kFALSE;
1602 if ( fZProb != inTracklet->GetZProb() ) return kFALSE;*/
1603 if ( fN2 != inTracklet->fN2 ) return kFALSE;
1604 if ( fNUsed != inTracklet->fNUsed ) return kFALSE;
1605 //if ( fFreq != inTracklet->GetFreq() ) return kFALSE;
1606 //if ( fNChange != inTracklet->GetNChange() ) return kFALSE;
1608 if ( fC != inTracklet->fC ) return kFALSE;
1609 //if ( fCC != inTracklet->GetCC() ) return kFALSE;
1610 if ( fChi2 != inTracklet->fChi2 ) return kFALSE;
1611 // if ( fChi2Z != inTracklet->GetChi2Z() ) return kFALSE;
1613 if ( fDet != inTracklet->fDet ) return kFALSE;
1614 if ( fMom != inTracklet->fMom ) return kFALSE;
1615 if ( fdX != inTracklet->fdX ) return kFALSE;
1617 for (Int_t iCluster = 0; iCluster < kNTimeBins; iCluster++){
1618 AliTRDcluster *curCluster = fClusters[iCluster];
1619 AliTRDcluster *inCluster = inTracklet->fClusters[iCluster];
1620 if (curCluster && inCluster){
1621 if (! curCluster->IsEqual(inCluster) ) {
1622 curCluster->Print();
1627 // if one cluster exists, and corresponding
1628 // in other tracklet doesn't - return kFALSE
1629 if(curCluster || inCluster) return kFALSE;