1 /**************************************************************************
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4 * Author: The ALICE Off-line Project. *
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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)
86 for(Int_t ic=kNclusters; ic--;) fIndexes[ic] = -1;
87 memset(fClusters, 0, kNclusters*sizeof(AliTRDcluster*));
88 fYref[0] = 0.; fYref[1] = 0.;
89 fZref[0] = 0.; fZref[1] = 0.;
90 fYfit[0] = 0.; fYfit[1] = 0.;
91 fZfit[0] = 0.; fZfit[1] = 0.;
92 memset(fdEdx, 0, kNslices*sizeof(Float_t));
93 for(int ispec=0; ispec<AliPID::kSPECIES; ispec++) fProb[ispec] = -1.;
94 fLabels[0]=-1; fLabels[1]=-1; // most freq MC labels
95 fLabels[2]=0; // number of different labels for tracklet
96 fRefCov[0] = 1.; fRefCov[1] = 0.; fRefCov[2] = 1.;
97 // covariance matrix [diagonal]
98 // default sy = 200um and sz = 2.3 cm
99 fCov[0] = 4.e-4; fCov[1] = 0.; fCov[2] = 5.3;
100 SetStandAlone(kFALSE);
103 //____________________________________________________________________
104 AliTRDseedV1::AliTRDseedV1(const AliTRDseedV1 &ref)
105 :AliTRDtrackletBase((AliTRDtrackletBase&)ref)
131 // Copy Constructor performing a deep copy
136 SetBit(kOwner, kFALSE);
137 SetStandAlone(ref.IsStandAlone());
141 //____________________________________________________________________
142 AliTRDseedV1& AliTRDseedV1::operator=(const AliTRDseedV1 &ref)
145 // Assignment Operator using the copy function
151 SetBit(kOwner, kFALSE);
156 //____________________________________________________________________
157 AliTRDseedV1::~AliTRDseedV1()
160 // Destructor. The RecoParam object belongs to the underlying tracker.
163 //printf("I-AliTRDseedV1::~AliTRDseedV1() : Owner[%s]\n", IsOwner()?"YES":"NO");
166 for(int itb=0; itb<kNclusters; itb++){
167 if(!fClusters[itb]) continue;
168 //AliInfo(Form("deleting c %p @ %d", fClusters[itb], itb));
169 delete fClusters[itb];
170 fClusters[itb] = 0x0;
175 //____________________________________________________________________
176 void AliTRDseedV1::Copy(TObject &ref) const
183 AliTRDseedV1 &target = (AliTRDseedV1 &)ref;
185 target.fReconstructor = fReconstructor;
186 target.fClusterIter = 0x0;
190 target.fS2PRF = fS2PRF;
191 target.fDiffL = fDiffL;
192 target.fDiffT = fDiffT;
193 target.fClusterIdx = 0;
196 target.fTilt = fTilt;
197 target.fPadLength = fPadLength;
207 target.fChi2 = fChi2;
209 memcpy(target.fIndexes, fIndexes, kNclusters*sizeof(Int_t));
210 memcpy(target.fClusters, fClusters, kNclusters*sizeof(AliTRDcluster*));
211 target.fYref[0] = fYref[0]; target.fYref[1] = fYref[1];
212 target.fZref[0] = fZref[0]; target.fZref[1] = fZref[1];
213 target.fYfit[0] = fYfit[0]; target.fYfit[1] = fYfit[1];
214 target.fZfit[0] = fZfit[0]; target.fZfit[1] = fZfit[1];
215 memcpy(target.fdEdx, fdEdx, kNslices*sizeof(Float_t));
216 memcpy(target.fProb, fProb, AliPID::kSPECIES*sizeof(Float_t));
217 memcpy(target.fLabels, fLabels, 3*sizeof(Int_t));
218 memcpy(target.fRefCov, fRefCov, 3*sizeof(Double_t));
219 memcpy(target.fCov, fCov, 3*sizeof(Double_t));
225 //____________________________________________________________
226 Bool_t AliTRDseedV1::Init(AliTRDtrackV1 *track)
228 // Initialize this tracklet using the track information
231 // track - the TRD track used to initialize the tracklet
233 // Detailed description
234 // The function sets the starting point and direction of the
235 // tracklet according to the information from the TRD track.
238 // The TRD track has to be propagated to the beginning of the
239 // chamber where the tracklet will be constructed
243 if(!track->GetProlongation(fX0, y, z)) return kFALSE;
249 //_____________________________________________________________________________
250 void AliTRDseedV1::Reset()
255 fExB=0.;fVD=0.;fT0=0.;fS2PRF=0.;
259 fDet=-1;fTilt=0.;fPadLength=0.;
261 fdX=0.;fX0=0.; fX=0.; fY=0.; fZ=0.;
265 for(Int_t ic=kNclusters; ic--;) fIndexes[ic] = -1;
266 memset(fClusters, 0, kNclusters*sizeof(AliTRDcluster*));
267 fYref[0] = 0.; fYref[1] = 0.;
268 fZref[0] = 0.; fZref[1] = 0.;
269 fYfit[0] = 0.; fYfit[1] = 0.;
270 fZfit[0] = 0.; fZfit[1] = 0.;
271 memset(fdEdx, 0, kNslices*sizeof(Float_t));
272 for(int ispec=0; ispec<AliPID::kSPECIES; ispec++) fProb[ispec] = -1.;
273 fLabels[0]=-1; fLabels[1]=-1; // most freq MC labels
274 fLabels[2]=0; // number of different labels for tracklet
275 fRefCov[0] = 1.; fRefCov[1] = 0.; fRefCov[2] = 1.;
276 // covariance matrix [diagonal]
277 // default sy = 200um and sz = 2.3 cm
278 fCov[0] = 4.e-4; fCov[1] = 0.; fCov[2] = 5.3;
281 //____________________________________________________________________
282 void AliTRDseedV1::UpDate(const AliTRDtrackV1 *trk)
284 // update tracklet reference position from the TRD track
285 // Funny name to avoid the clash with the function AliTRDseed::Update() (has to be made obselete)
287 Double_t fSnp = trk->GetSnp();
288 Double_t fTgl = trk->GetTgl();
290 fYref[1] = fSnp/(1. - fSnp*fSnp);
292 SetCovRef(trk->GetCovariance());
294 Double_t dx = trk->GetX() - fX0;
295 fYref[0] = trk->GetY() - dx*fYref[1];
296 fZref[0] = trk->GetZ() - dx*fZref[1];
299 //_____________________________________________________________________________
300 void AliTRDseedV1::UpdateUsed()
303 // Calculate number of used clusers in the tracklet
306 Int_t nused = 0, nshared = 0;
307 for (Int_t i = kNclusters; i--; ) {
308 if (!fClusters[i]) continue;
309 if(fClusters[i]->IsUsed()){
311 } else if(fClusters[i]->IsShared()){
312 if(IsStandAlone()) nused++;
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=kNclusters; ic--; c++) {
338 if((*c)->IsShared() || (*c)->IsUsed()){
339 if((*c)->IsShared()) SetNShared(GetNShared()-1);
340 else SetNUsed(GetNUsed()-1);
347 if((*c)->IsUsed() || IsKink()){
358 //____________________________________________________________________
359 void AliTRDseedV1::CookdEdx(Int_t nslices)
361 // Calculates average dE/dx for all slices and store them in the internal array fdEdx.
364 // nslices : number of slices for which dE/dx should be calculated
366 // store results in the internal array fdEdx. This can be accessed with the method
367 // AliTRDseedV1::GetdEdx()
369 // Detailed description
370 // Calculates average dE/dx for all slices. Depending on the PID methode
371 // the number of slices can be 3 (LQ) or 8(NN).
372 // The calculation of dQ/dl are done using the tracklet fit results (see AliTRDseedV1::GetdQdl(Int_t))
374 // The following effects are included in the calculation:
375 // 1. calibration values for t0 and vdrift (using x coordinate to calculate slice)
376 // 2. cluster sharing (optional see AliTRDrecoParam::SetClusterSharing())
380 Int_t nclusters[kNslices];
381 memset(nclusters, 0, kNslices*sizeof(Int_t));
382 memset(fdEdx, 0, kNslices*sizeof(Float_t));
384 const Double_t kDriftLength = (.5 * AliTRDgeometry::AmThick() + AliTRDgeometry::DrThick());
386 AliTRDcluster *c = 0x0;
387 for(int ic=0; ic<AliTRDtrackerV1::GetNTimeBins(); ic++){
388 if(!(c = fClusters[ic]) && !(c = fClusters[ic+kNtb])) continue;
389 Float_t dx = TMath::Abs(fX0 - c->GetX());
391 // Filter clusters for dE/dx calculation
393 // 1.consider calibration effects for slice determination
395 if(dx<kDriftLength){ // TODO should be replaced by c->IsInChamber()
396 slice = Int_t(dx * nslices / kDriftLength);
397 } else slice = c->GetX() < fX0 ? nslices-1 : 0;
400 // 2. take sharing into account
401 Float_t w = /*c->IsShared() ? .5 :*/ 1.;
403 // 3. take into account large clusters TODO
404 //w *= c->GetNPads() > 3 ? .8 : 1.;
407 fdEdx[slice] += w * GetdQdl(ic); //fdQdl[ic];
409 } // End of loop over clusters
411 //if(fReconstructor->GetPIDMethod() == AliTRDReconstructor::kLQPID){
412 if(nslices == AliTRDpidUtil::kLQslices){
413 // calculate mean charge per slice (only LQ PID)
414 for(int is=0; is<nslices; is++){
415 if(nclusters[is]) fdEdx[is] /= nclusters[is];
420 //_____________________________________________________________________________
421 void AliTRDseedV1::CookLabels()
424 // Cook 2 labels for seed
430 for (Int_t i = 0; i < kNclusters; i++) {
431 if (!fClusters[i]) continue;
432 for (Int_t ilab = 0; ilab < 3; ilab++) {
433 if (fClusters[i]->GetLabel(ilab) >= 0) {
434 labels[nlab] = fClusters[i]->GetLabel(ilab);
440 fLabels[2] = AliMathBase::Freq(nlab,labels,out,kTRUE);
442 if ((fLabels[2] > 1) && (out[3] > 1)) fLabels[1] = out[2];
446 //____________________________________________________________________
447 void AliTRDseedV1::GetClusterXY(const AliTRDcluster *c, Double_t &x, Double_t &y)
449 // Return corrected position of the cluster taking into
450 // account variation of the drift velocity with drift length.
453 // drift velocity correction TODO to be moved to the clusterizer
454 const Float_t cx[] = {
455 -9.6280e-02, 1.3091e-01,-1.7415e-02,-9.9221e-02,-1.2040e-01,-9.5493e-02,
456 -5.0041e-02,-1.6726e-02, 3.5756e-03, 1.8611e-02, 2.6378e-02, 3.3823e-02,
457 3.4811e-02, 3.5282e-02, 3.5386e-02, 3.6047e-02, 3.5201e-02, 3.4384e-02,
458 3.2864e-02, 3.1932e-02, 3.2051e-02, 2.2539e-02,-2.5154e-02,-1.2050e-01,
462 // PRF correction TODO to be replaced by the gaussian
463 // approximation with full error parametrization and // moved to the clusterizer
464 const Float_t cy[AliTRDgeometry::kNlayer][3] = {
465 { 4.014e-04, 8.605e-03, -6.880e+00},
466 {-3.061e-04, 9.663e-03, -6.789e+00},
467 { 1.124e-03, 1.105e-02, -6.825e+00},
468 {-1.527e-03, 1.231e-02, -6.777e+00},
469 { 2.150e-03, 1.387e-02, -6.783e+00},
470 {-1.296e-03, 1.486e-02, -6.825e+00}
473 Int_t ily = AliTRDgeometry::GetLayer(c->GetDetector());
474 x = c->GetX() - cx[c->GetLocalTimeBin()];
475 y = c->GetY() + cy[ily][0] + cy[ily][1] * TMath::Sin(cy[ily][2] * c->GetCenter());
479 //____________________________________________________________________
480 Float_t AliTRDseedV1::GetdQdl(Int_t ic) const
482 // Using the linear approximation of the track inside one TRD chamber (TRD tracklet)
483 // the charge per unit length can be written as:
485 // #frac{dq}{dl} = #frac{q_{c}}{dx * #sqrt{1 + #(){#frac{dy}{dx}}^{2}_{fit} + #(){#frac{dy}{dx}}^{2}_{ref}}}
487 // where qc is the total charge collected in the current time bin and dx is the length
488 // of the time bin. For the moment (Jan 20 2009) only pad row cross corrections are
489 // considered for the charge but none are applied for drift velocity variations along
490 // the drift region or assymetry of the TRF
492 // Author : Alex Bercuci <A.Bercuci@gsi.de>
495 if(fClusters[ic]) dq += TMath::Abs(fClusters[ic]->GetQ());
496 if(fClusters[ic+kNtb]) dq += TMath::Abs(fClusters[ic+kNtb]->GetQ());
497 if(dq<1.e-3 || fdX < 1.e-3) return 0.;
499 return dq/fdX/TMath::Sqrt(1. + fYfit[1]*fYfit[1] + fZref[1]*fZref[1]);
502 //____________________________________________________________________
503 Float_t* AliTRDseedV1::GetProbability(Bool_t force)
505 if(!force) return &fProb[0];
506 if(!CookPID()) return 0x0;
510 //____________________________________________________________
511 Bool_t AliTRDseedV1::CookPID()
513 // Fill probability array for tracklet from the DB.
518 // returns pointer to the probability array and 0x0 if missing DB access
520 // Detailed description
523 // retrive calibration db
524 AliTRDcalibDB *calibration = AliTRDcalibDB::Instance();
526 AliError("No access to calibration data");
530 if (!fReconstructor) {
531 AliError("Reconstructor not set.");
535 // Retrieve the CDB container class with the parametric detector response
536 const AliTRDCalPID *pd = calibration->GetPIDObject(fReconstructor->GetPIDMethod());
538 AliError("No access to AliTRDCalPID object");
541 //AliInfo(Form("Method[%d] : %s", fReconstructor->GetRecoParam() ->GetPIDMethod(), pd->IsA()->GetName()));
543 // calculate tracklet length TO DO
544 Float_t length = (AliTRDgeometry::AmThick() + AliTRDgeometry::DrThick());
545 /// TMath::Sqrt((1.0 - fSnp[iPlane]*fSnp[iPlane]) / (1.0 + fTgl[iPlane]*fTgl[iPlane]));
548 CookdEdx(fReconstructor->GetNdEdxSlices());
550 // Sets the a priori probabilities
551 for(int ispec=0; ispec<AliPID::kSPECIES; ispec++) {
552 fProb[ispec] = pd->GetProbability(ispec, fMom, &fdEdx[0], length, GetPlane());
558 //____________________________________________________________________
559 Float_t AliTRDseedV1::GetQuality(Bool_t kZcorr) const
562 // Returns a quality measurement of the current seed
565 Float_t zcorr = kZcorr ? fTilt * (fZfit[0] - fZref[0]) : 0.;
567 .5 * TMath::Abs(18.0 - GetN())
568 + 10.* TMath::Abs(fYfit[1] - fYref[1])
569 + 5. * TMath::Abs(fYfit[0] - fYref[0] + zcorr)
570 + 2. * TMath::Abs(fZfit[0] - fZref[0]) / fPadLength;
573 //____________________________________________________________________
574 void AliTRDseedV1::GetCovAt(Double_t x, Double_t *cov) const
576 // Computes covariance in the y-z plane at radial point x (in tracking coordinates)
577 // and returns the results in the preallocated array cov[3] as :
584 // For the linear transformation
588 // The error propagation has the general form
590 // C_{Y} = T_{x} C_{X} T_{x}^{T}
592 // We apply this formula 2 times. First to calculate the covariance of the tracklet
593 // at point x we consider:
595 // T_{x} = (1 x); X=(y0 dy/dx); C_{X}=#(){#splitline{Var(y0) Cov(y0, dy/dx)}{Cov(y0, dy/dx) Var(dy/dx)}}
597 // and secondly to take into account the tilt angle
599 // T_{#alpha} = #(){#splitline{cos(#alpha) __ sin(#alpha)}{-sin(#alpha) __ cos(#alpha)}}; X=(y z); C_{X}=#(){#splitline{Var(y) 0}{0 Var(z)}}
602 // using simple trigonometrics one can write for this last case
604 // 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})}}
606 // which can be aproximated for small alphas (2 deg) with
608 // 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}}}
611 // before applying the tilt rotation we also apply systematic uncertainties to the tracklet
612 // position which can be tunned from outside via the AliTRDrecoParam::SetSysCovMatrix(). They might
613 // account for extra misalignment/miscalibration uncertainties.
616 // Alex Bercuci <A.Bercuci@gsi.de>
617 // Date : Jan 8th 2009
622 Double_t sy2 = fCov[0] +2.*xr*fCov[1] + xr*xr*fCov[2];
623 Double_t sz2 = fPadLength*fPadLength/12.;
625 // insert systematic uncertainties
627 fReconstructor->GetRecoParam()->GetSysCovMatrix(sys);
631 // rotate covariance matrix
632 Double_t t2 = fTilt*fTilt;
633 Double_t correction = 1./(1. + t2);
634 cov[0] = (sy2+t2*sz2)*correction;
635 cov[1] = fTilt*(sz2 - sy2)*correction;
636 cov[2] = (t2*sy2+sz2)*correction;
640 //____________________________________________________________________
641 void AliTRDseedV1::Calibrate()
643 // Retrieve calibration and position parameters from OCDB.
644 // The following information are used
646 // - column and row position of first attached cluster. If no clusters are attached
647 // to the tracklet a random central chamber position (c=70, r=7) will be used.
649 // The following information is cached in the tracklet
650 // t0 (trigger delay)
653 // omega*tau = tg(a_L)
654 // diffusion coefficients (longitudinal and transversal)
657 // Alex Bercuci <A.Bercuci@gsi.de>
658 // Date : Jan 8th 2009
661 AliCDBManager *cdb = AliCDBManager::Instance();
662 if(cdb->GetRun() < 0){
663 AliError("OCDB manager not properly initialized");
667 AliTRDcalibDB *calib = AliTRDcalibDB::Instance();
668 AliTRDCalROC *vdROC = calib->GetVdriftROC(fDet),
669 *t0ROC = calib->GetT0ROC(fDet);;
670 const AliTRDCalDet *vdDet = calib->GetVdriftDet();
671 const AliTRDCalDet *t0Det = calib->GetT0Det();
673 Int_t col = 70, row = 7;
674 AliTRDcluster **c = &fClusters[0];
677 while (ic<kNclusters && !(*c)){ic++; c++;}
679 col = (*c)->GetPadCol();
680 row = (*c)->GetPadRow();
684 fT0 = t0Det->GetValue(fDet) + t0ROC->GetValue(col,row);
685 fVD = vdDet->GetValue(fDet) * vdROC->GetValue(col, row);
686 fS2PRF = calib->GetPRFWidth(fDet, col, row); fS2PRF *= fS2PRF;
687 fExB = AliTRDCommonParam::Instance()->GetOmegaTau(fVD);
688 AliTRDCommonParam::Instance()->GetDiffCoeff(fDiffL,
690 SetBit(kCalib, kTRUE);
693 //____________________________________________________________________
694 void AliTRDseedV1::SetOwner()
696 //AliInfo(Form("own [%s] fOwner[%s]", own?"YES":"NO", fOwner?"YES":"NO"));
698 if(TestBit(kOwner)) return;
699 for(int ic=0; ic<kNclusters; ic++){
700 if(!fClusters[ic]) continue;
701 fClusters[ic] = new AliTRDcluster(*fClusters[ic]);
706 // //____________________________________________________________________
707 // Bool_t AliTRDseedV1::AttachClustersIter(AliTRDtrackingChamber *chamber, Float_t quality, Bool_t kZcorr, AliTRDcluster *c)
710 // // Iterative process to register clusters to the seed.
711 // // In iteration 0 we try only one pad-row and if quality not
712 // // sufficient we try 2 pad-rows (about 5% of tracks cross 2 pad-rows)
717 // if(!fReconstructor->GetRecoParam() ){
718 // AliError("Seed can not be used without a valid RecoParam.");
722 // AliTRDchamberTimeBin *layer = 0x0;
723 // if(fReconstructor->GetStreamLevel(AliTRDReconstructor::kTracker)>=7){
724 // AliTRDtrackingChamber ch(*chamber);
726 // TTreeSRedirector &cstreamer = *fReconstructor->GetDebugStream(AliTRDReconstructor::kTracker);
727 // cstreamer << "AttachClustersIter"
728 // << "chamber.=" << &ch
729 // << "tracklet.=" << this
734 // Double_t kroady = fReconstructor->GetRecoParam() ->GetRoad1y();
735 // Double_t kroadz = fPadLength * .5 + 1.;
737 // // initialize configuration parameters
738 // Float_t zcorr = kZcorr ? fTilt * (fZfit[0] - fZref[0]) : 0.;
739 // Int_t niter = kZcorr ? 1 : 2;
741 // Double_t yexp, zexp;
743 // // start seed update
744 // for (Int_t iter = 0; iter < niter; iter++) {
746 // for (Int_t iTime = 0; iTime < AliTRDtrackerV1::GetNTimeBins(); iTime++) {
747 // if(!(layer = chamber->GetTB(iTime))) continue;
748 // if(!Int_t(*layer)) continue;
750 // // define searching configuration
751 // Double_t dxlayer = layer->GetX() - fX0;
754 // //Try 2 pad-rows in second iteration
756 // zexp = fZref[0] + fZref[1] * dxlayer - zcorr;
757 // if (zexp > c->GetZ()) zexp = c->GetZ() + fPadLength*0.5;
758 // if (zexp < c->GetZ()) zexp = c->GetZ() - fPadLength*0.5;
760 // } else zexp = fZref[0] + (kZcorr ? fZref[1] * dxlayer : 0.);
761 // yexp = fYref[0] + fYref[1] * dxlayer - zcorr;
763 // // Get and register cluster
764 // Int_t index = layer->SearchNearestCluster(yexp, zexp, kroady, kroadz);
765 // if (index < 0) continue;
766 // AliTRDcluster *cl = (*layer)[index];
768 // fIndexes[iTime] = layer->GetGlobalIndex(index);
769 // fClusters[iTime] = cl;
770 // // fY[iTime] = cl->GetY();
771 // // fZ[iTime] = cl->GetZ();
774 // if(fReconstructor->GetStreamLevel(AliTRDReconstructor::kTracker)>=7) AliInfo(Form("iter = %d ncl [%d] = %d", iter, fDet, ncl));
777 // // calculate length of the time bin (calibration aware)
778 // Int_t irp = 0; Float_t x[2]={0., 0.}; Int_t tb[2] = {0,0};
779 // for (Int_t iTime = 0; iTime < AliTRDtrackerV1::GetNTimeBins(); iTime++) {
780 // if(!fClusters[iTime]) continue;
781 // x[irp] = fClusters[iTime]->GetX();
786 // Int_t dtb = tb[1] - tb[0];
787 // fdX = dtb ? (x[0] - x[1]) / dtb : 0.15;
789 // // update X0 from the clusters (calibration/alignment aware)
790 // for (Int_t iTime = 0; iTime < AliTRDtrackerV1::GetNTimeBins(); iTime++) {
791 // if(!(layer = chamber->GetTB(iTime))) continue;
792 // if(!layer->IsT0()) continue;
793 // if(fClusters[iTime]){
794 // fX0 = fClusters[iTime]->GetX();
796 // } else { // we have to infere the position of the anode wire from the other clusters
797 // for (Int_t jTime = iTime+1; jTime < AliTRDtrackerV1::GetNTimeBins(); jTime++) {
798 // if(!fClusters[jTime]) continue;
799 // fX0 = fClusters[jTime]->GetX() + fdX * (jTime - iTime);
805 // // update YZ reference point
808 // // update x reference positions (calibration/alignment aware)
809 // // for (Int_t iTime = 0; iTime < AliTRDtrackerV1::GetNTimeBins(); iTime++) {
810 // // if(!fClusters[iTime]) continue;
811 // // fX[iTime] = fX0 - fClusters[iTime]->GetX();
816 // if(fReconstructor->GetStreamLevel(AliTRDReconstructor::kTracker)>=7) AliInfo(Form("iter = %d nclFit [%d] = %d", iter, fDet, fN2));
819 // tquality = GetQuality(kZcorr);
820 // if(tquality < quality) break;
821 // else quality = tquality;
825 // if (!IsOK()) return kFALSE;
827 // if(fReconstructor->GetStreamLevel(AliTRDReconstructor::kTracker)>=1) CookLabels();
829 // // load calibration params
835 //____________________________________________________________________
836 Bool_t AliTRDseedV1::AttachClusters(AliTRDtrackingChamber *chamber, Bool_t tilt)
839 // Projective algorithm to attach clusters to seeding tracklets
845 // Detailed description
846 // 1. Collapse x coordinate for the full detector plane
847 // 2. truncated mean on y (r-phi) direction
849 // 4. truncated mean on z direction
853 Bool_t kPRINT = kFALSE;
854 if(!fReconstructor->GetRecoParam() ){
855 AliError("Seed can not be used without a valid RecoParam.");
858 // Initialize reco params for this tracklet
859 // 1. first time bin in the drift region
861 Int_t kClmin = Int_t(fReconstructor->GetRecoParam() ->GetFindableClusters()*AliTRDtrackerV1::GetNTimeBins());
863 Double_t syRef = TMath::Sqrt(fRefCov[0]);
865 Double_t kroady = 1.;
866 //fReconstructor->GetRecoParam() ->GetRoad1y();
867 Double_t kroadz = fPadLength * 1.5 + 1.;
868 if(kPRINT) printf("AttachClusters() sy[%f] road[%f]\n", syRef, kroady);
871 const Int_t kNrows = 16;
872 AliTRDcluster *clst[kNrows][kNclusters];
873 Double_t cond[4], dx, dy, yt, zt,
874 yres[kNrows][kNclusters];
875 Int_t idxs[kNrows][kNclusters], ncl[kNrows], ncls = 0;
876 memset(ncl, 0, kNrows*sizeof(Int_t));
877 memset(clst, 0, kNrows*kNclusters*sizeof(AliTRDcluster*));
879 // Do cluster projection
880 AliTRDcluster *c = 0x0;
881 AliTRDchamberTimeBin *layer = 0x0;
882 Bool_t kBUFFER = kFALSE;
883 for (Int_t it = 0; it < AliTRDtrackerV1::GetNTimeBins(); it++) {
884 if(!(layer = chamber->GetTB(it))) continue;
885 if(!Int_t(*layer)) continue;
887 dx = fX0 - layer->GetX();
888 yt = fYref[0] - fYref[1] * dx;
889 zt = fZref[0] - fZref[1] * dx;
890 if(kPRINT) printf("\t%2d dx[%f] yt[%f] zt[%f]\n", it, dx, yt, zt);
892 // select clusters on a 5 sigmaKalman level
893 cond[0] = yt; cond[2] = kroady;
894 cond[1] = zt; cond[3] = kroadz;
896 layer->GetClusters(cond, idx, n, 6);
897 for(Int_t ic = n; ic--;){
898 c = (*layer)[idx[ic]];
900 dy += tilt ? fTilt * (c->GetZ() - zt) : 0.;
901 // select clusters on a 3 sigmaKalman level
902 /* if(tilt && TMath::Abs(dy) > 3.*syRef){
903 printf("too large !!!\n");
906 Int_t r = c->GetPadRow();
907 if(kPRINT) printf("\t\t%d dy[%f] yc[%f] r[%d]\n", ic, TMath::Abs(dy), c->GetY(), r);
909 idxs[r][ncl[r]] = idx[ic];
910 yres[r][ncl[r]] = dy;
913 if(ncl[r] >= kNclusters) {
914 AliWarning(Form("Cluster candidates reached limit %d. Some may be lost.", kNclusters));
921 if(kPRINT) printf("Found %d clusters\n", ncls);
922 if(ncls<kClmin) return kFALSE;
924 // analyze each row individualy
925 Double_t mean, syDis;
926 Int_t nrow[] = {0, 0, 0}, nr = 0, lr=-1;
927 for(Int_t ir=kNrows; ir--;){
928 if(!(ncl[ir])) continue;
929 if(lr>0 && lr-ir != 1){
930 if(kPRINT) printf("W - gap in rows attached !!\n");
932 if(kPRINT) printf("\tir[%d] lr[%d] n[%d]\n", ir, lr, ncl[ir]);
933 // Evaluate truncated mean on the y direction
934 if(ncl[ir] > 3) AliMathBase::EvaluateUni(ncl[ir], yres[ir], mean, syDis, Int_t(ncl[ir]*.8));
936 mean = 0.; syDis = 0.;
939 // TODO check mean and sigma agains cluster resolution !!
940 if(kPRINT) printf("\tr[%2d] m[%f %5.3fsigma] s[%f]\n", ir, mean, TMath::Abs(mean/syRef), syDis);
941 // select clusters on a 3 sigmaDistr level
942 Bool_t kFOUND = kFALSE;
943 for(Int_t ic = ncl[ir]; ic--;){
944 if(yres[ir][ic] - mean > 3. * syDis){
945 clst[ir][ic] = 0x0; continue;
947 nrow[nr]++; kFOUND = kTRUE;
951 lr = ir; if(nr>=3) break;
953 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]);
955 // classify cluster rows
962 SetBit(kRowCross, kTRUE); // mark pad row crossing
963 if(nrow[0] > nrow[1]){ row = lr+1; lr = -1;}
972 SetBit(kRowCross, kTRUE); // mark pad row crossing
975 if(kPRINT) printf("\trow[%d] n[%d]\n\n", row, nrow[0]);
976 if(row<0) return kFALSE;
978 // Select and store clusters
979 // We should consider here :
980 // 1. How far is the chamber boundary
981 // 2. How big is the mean
983 for (Int_t ir = 0; ir < nr; ir++) {
984 Int_t jr = row + ir*lr;
985 if(kPRINT) printf("\tattach %d clusters for row %d\n", ncl[jr], jr);
986 for (Int_t ic = 0; ic < ncl[jr]; ic++) {
987 if(!(c = clst[jr][ic])) continue;
988 Int_t it = c->GetPadTime();
989 // TODO proper indexing of clusters !!
990 fIndexes[it+kNtb*ir] = chamber->GetTB(it)->GetGlobalIndex(idxs[jr][ic]);
991 fClusters[it+kNtb*ir] = c;
993 //printf("\tid[%2d] it[%d] idx[%d]\n", ic, it, fIndexes[it]);
999 // number of minimum numbers of clusters expected for the tracklet
1001 //AliWarning(Form("Not enough clusters to fit the tracklet %d [%d].", n, kClmin));
1006 // Load calibration parameters for this tracklet
1009 // calculate dx for time bins in the drift region (calibration aware)
1010 Int_t irp = 0; Float_t x[2] = {0.,0.}; Int_t tb[2]={0,0};
1011 for (Int_t it = t0; it < AliTRDtrackerV1::GetNTimeBins(); it++) {
1012 if(!fClusters[it]) continue;
1013 x[irp] = fClusters[it]->GetX();
1018 Int_t dtb = tb[1] - tb[0];
1019 fdX = dtb ? (x[0] - x[1]) / dtb : 0.15;
1021 // update X0 from the clusters (calibration/alignment aware) TODO remove dependence on x0 !!
1022 for (Int_t it = 0; it < AliTRDtrackerV1::GetNTimeBins(); it++) {
1023 if(!(layer = chamber->GetTB(it))) continue;
1024 if(!layer->IsT0()) continue;
1026 fX0 = fClusters[it]->GetX();
1028 } else { // we have to infere the position of the anode wire from the other clusters
1029 for (Int_t jt = it+1; jt < AliTRDtrackerV1::GetNTimeBins(); jt++) {
1030 if(!fClusters[jt]) continue;
1031 fX0 = fClusters[jt]->GetX() + fdX * (jt - it);
1040 //____________________________________________________________
1041 void AliTRDseedV1::Bootstrap(const AliTRDReconstructor *rec)
1043 // Fill in all derived information. It has to be called after recovery from file or HLT.
1044 // The primitive data are
1045 // - list of clusters
1046 // - detector (as the detector will be removed from clusters)
1047 // - position of anode wire (fX0) - temporary
1048 // - track reference position and direction
1049 // - momentum of the track
1050 // - time bin length [cm]
1052 // A.Bercuci <A.Bercuci@gsi.de> Oct 30th 2008
1054 fReconstructor = rec;
1056 AliTRDpadPlane *pp = g.GetPadPlane(fDet);
1057 fTilt = TMath::Tan(TMath::DegToRad()*pp->GetTiltingAngle());
1058 fPadLength = pp->GetLengthIPad();
1059 //fSnp = fYref[1]/TMath::Sqrt(1+fYref[1]*fYref[1]);
1061 Int_t n = 0, nshare = 0, nused = 0;
1062 AliTRDcluster **cit = &fClusters[0];
1063 for(Int_t ic = kNclusters; ic--; cit++){
1066 if((*cit)->IsShared()) nshare++;
1067 if((*cit)->IsUsed()) nused++;
1069 SetN(n); SetNUsed(nused); SetNShared(nshare);
1076 //____________________________________________________________________
1077 Bool_t AliTRDseedV1::Fit(Bool_t tilt, Int_t errors)
1080 // Linear fit of the tracklet
1085 // True if successful
1087 // Detailed description
1088 // 2. Check if tracklet crosses pad row boundary
1089 // 1. Calculate residuals in the y (r-phi) direction
1090 // 3. Do a Least Square Fit to the data
1093 if(!IsCalibrated()){
1094 AliWarning("Tracklet fit failed. Call Calibrate().");
1098 const Int_t kClmin = 8;
1101 // cluster error parametrization parameters
1102 // 1. sy total charge
1103 const Float_t sq0inv = 0.019962; // [1/q0]
1104 const Float_t sqb = 1.0281564; //[cm]
1105 // 2. sy for the PRF
1106 const Float_t scy[AliTRDgeometry::kNlayer][4] = {
1107 {2.827e-02, 9.600e-04, 4.296e-01, 2.271e-02},
1108 {2.952e-02,-2.198e-04, 4.146e-01, 2.339e-02},
1109 {3.090e-02, 1.514e-03, 4.020e-01, 2.402e-02},
1110 {3.260e-02,-2.037e-03, 3.946e-01, 2.509e-02},
1111 {3.439e-02,-3.601e-04, 3.883e-01, 2.623e-02},
1112 {3.510e-02, 2.066e-03, 3.651e-01, 2.588e-02},
1114 // 3. sy parallel to the track
1115 const Float_t sy0 = 2.649e-02; // [cm]
1116 const Float_t sya = -8.864e-04; // [cm]
1117 const Float_t syb = -2.435e-01; // [cm]
1119 // 4. sx parallel to the track
1120 const Float_t sxgc = 5.427e-02;
1121 const Float_t sxgm = 7.783e-01;
1122 const Float_t sxgs = 2.743e-01;
1123 const Float_t sxe0 =-2.065e+00;
1124 const Float_t sxe1 =-2.978e-02;
1126 // 5. sx perpendicular to the track
1127 // const Float_t sxd0 = 1.881e-02;
1128 // const Float_t sxd1 =-4.101e-01;
1129 // const Float_t sxd2 = 1.572e+00;
1131 // get track direction
1132 Double_t y0 = fYref[0];
1133 Double_t dydx = fYref[1];
1134 Double_t z0 = fZref[0];
1135 Double_t dzdx = fZref[1];
1138 // calculation of tg^2(phi - a_L) and tg^2(a_L)
1139 Double_t tgg = (dydx-fExB)/(1.+dydx*fExB); tgg *= tgg;
1140 //Double_t exb2= fExB*fExB;
1142 //AliTRDtrackerV1::AliTRDLeastSquare fitterZ;
1143 TLinearFitter fitterY(1, "pol1");
1144 // convertion factor from square to gauss distribution for sigma
1145 //Double_t convert = 1./TMath::Sqrt(12.);
1147 // book cluster information
1148 Double_t qc[kNclusters], xc[kNclusters], yc[kNclusters], zc[kNclusters], sy[kNclusters];
1150 Int_t ily = AliTRDgeometry::GetLayer(fDet);
1152 AliTRDcluster *c=0x0, **jc = &fClusters[0];
1153 for (Int_t ic=0; ic<kNtb; ic++, ++jc) {
1160 if(!(c = (*jc))) continue;
1161 if(!c->IsInChamber()) continue;
1164 if(c->GetNPads()>4) w = .5;
1165 if(c->GetNPads()>5) w = .2;
1167 //zRow[fN] = c->GetPadRow();
1168 qc[fN] = TMath::Abs(c->GetQ());
1169 // correct cluster position for PRF and v drift
1170 //Int_t jc = TMath::Max(fN-3, 0);
1171 //xc[fN] = c->GetXloc(fT0, fVD, &qc[jc], &xc[jc]/*, z0 - c->GetX()*dzdx*/);
1172 //Double_t s2 = fS2PRF + fDiffL*fDiffL*xc[fN]/(1.+2.*exb2)+tgg*xc[fN]*xc[fN]*exb2/12.;
1173 //yc[fN] = c->GetYloc(s2, fPadLength, xc[fN], fExB);
1175 // uncalibrated cluster correction
1177 Double_t x, y; GetClusterXY(c, x, y);
1182 // extrapolated y value for the track
1183 yt = y0 - xc[fN]*dydx;
1184 // extrapolated z value for the track
1185 zt = z0 - xc[fN]*dzdx;
1187 if(tilt) yc[fN] -= fTilt*(zc[fN] - zt);
1189 // ELABORATE CLUSTER ERROR
1190 // TODO to be moved to AliTRDcluster
1191 // basic y error (|| to track).
1192 sy[fN] = xc[fN] < AliTRDgeometry::CamHght() ? 2. : sy0 + sya*TMath::Exp(1./(xc[fN]+syb));
1193 //printf("cluster[%d]\n\tsy[0] = %5.3e [um]\n", fN, sy[fN]*1.e4);
1194 // y error due to total charge
1195 sy[fN] += sqb*(1./qc[fN] - sq0inv);
1196 //printf("\tsy[1] = %5.3e [um]\n", sy[fN]*1.e4);
1197 // y error due to PRF
1198 sy[fN] += scy[ily][0]*TMath::Gaus(c->GetCenter(), scy[ily][1], scy[ily][2]) - scy[ily][3];
1199 //printf("\tsy[2] = %5.3e [um]\n", sy[fN]*1.e4);
1204 // error of drift length parallel to the track
1205 Double_t sx = sxgc*TMath::Gaus(xc[fN], sxgm, sxgs) + TMath::Exp(sxe0+sxe1*xc[fN]); // [cm]
1206 //printf("\tsx[0] = %5.3e [um]\n", sx*1.e4);
1207 // error of drift length perpendicular to the track
1208 //sx += sxd0 + sxd1*d + sxd2*d*d;
1209 sx *= sx; // square sx
1211 // add error from ExB
1212 if(errors>0) sy[fN] += fExB*fExB*sx;
1213 //printf("\tsy[3] = %5.3e [um^2]\n", sy[fN]*1.e8);
1215 // global radial error due to misalignment/miscalibration
1216 Double_t sx0 = 0.; sx0 *= sx0;
1217 // add sx contribution to sy due to track angle
1218 if(errors>1) sy[fN] += tgg*(sx+sx0);
1219 // TODO we should add tilt pad correction here
1220 //printf("\tsy[4] = %5.3e [um^2]\n", sy[fN]*1.e8);
1221 c->SetSigmaY2(sy[fN]);
1223 sy[fN] = TMath::Sqrt(sy[fN]);
1224 fitterY.AddPoint(&xc[fN], yc[fN], sy[fN]);
1228 if (fN < kClmin) return kFALSE;
1232 fYfit[0] = fitterY.GetParameter(0);
1233 fYfit[1] = -fitterY.GetParameter(1);
1235 Double_t *p = fitterY.GetCovarianceMatrix();
1236 fCov[0] = p[0]; // variance of y0
1237 fCov[1] = p[1]; // covariance of y0, dydx
1238 fCov[2] = p[3]; // variance of dydx
1239 // the ref radial position is set at the minimum of
1240 // the y variance of the tracklet
1241 fX = -fCov[1]/fCov[2]; //fXref = fX0 - fXref;
1242 fS2Y = fCov[0] +2.*fX*fCov[1] + fX*fX*fCov[2];
1246 // TODO pad row cross position estimation !!!
1247 //AliInfo(Form("Padrow cross in detector %d", fDet));
1248 fZfit[0] = .5*(zc[0]+zc[fN-1]); fZfit[1] = 0.;
1249 fS2Z = 0.02+1.55*fZref[1]; fS2Z *= fS2Z;
1251 fZfit[0] = zc[0]; fZfit[1] = 0.;
1252 fS2Z = fPadLength*fPadLength/12.;
1256 // // determine z offset of the fit
1257 // Float_t zslope = 0.;
1258 // Int_t nchanges = 0, nCross = 0;
1259 // if(nz==2){ // tracklet is crossing pad row
1260 // // Find the break time allowing one chage on pad-rows
1261 // // with maximal number of accepted clusters
1262 // Int_t padRef = zRow[0];
1263 // for (Int_t ic=1; ic<fN; ic++) {
1264 // if(zRow[ic] == padRef) continue;
1267 // if(zRow[ic-1] == zRow[ic]){
1268 // printf("ERROR in pad row change!!!\n");
1271 // // evaluate parameters of the crossing point
1272 // Float_t sx = (xc[ic-1] - xc[ic])*convert;
1273 // fCross[0] = .5 * (xc[ic-1] + xc[ic]);
1274 // fCross[2] = .5 * (zc[ic-1] + zc[ic]);
1275 // fCross[3] = TMath::Max(dzdx * sx, .01);
1276 // zslope = zc[ic-1] > zc[ic] ? 1. : -1.;
1277 // padRef = zRow[ic];
1283 // // condition on nCross and reset nchanges TODO
1286 // if(dzdx * zslope < 0.){
1287 // AliInfo("Tracklet-Track mismatch in dzdx. TODO.");
1291 // //zc[nc] = fitterZ.GetFunctionParameter(0);
1292 // fCross[1] = fYfit[0] - fCross[0] * fYfit[1];
1293 // fCross[0] = fX0 - fCross[0];
1301 //_____________________________________________________________________________
1302 void AliTRDseedV1::FitMI()
1306 // Marian Ivanov's version
1308 // linear fit on the y direction with respect to the reference direction.
1309 // The residuals for each x (x = xc - x0) are deduced from:
1311 // the tilting correction is written :
1312 // y = yc + h*(zc-zt) (2)
1313 // yt = y0+dy/dx*x (3)
1314 // zt = z0+dz/dx*x (4)
1315 // from (1),(2),(3) and (4)
1316 // dy = yc - y0 - (dy/dx + h*dz/dx)*x + h*(zc-z0)
1317 // the last term introduces the correction on y direction due to tilting pads. There are 2 ways to account for this:
1318 // 1. use tilting correction for calculating the y
1319 // 2. neglect tilting correction here and account for it in the error parametrization of the tracklet.
1320 const Float_t kRatio = 0.8;
1321 const Int_t kClmin = 5;
1322 const Float_t kmaxtan = 2;
1324 if (TMath::Abs(fYref[1]) > kmaxtan){
1325 //printf("Exit: Abs(fYref[1]) = %3.3f, kmaxtan = %3.3f\n", TMath::Abs(fYref[1]), kmaxtan);
1326 return; // Track inclined too much
1329 Float_t sigmaexp = 0.05 + TMath::Abs(fYref[1] * 0.25); // Expected r.m.s in y direction
1330 Float_t ycrosscor = fPadLength * fTilt * 0.5; // Y correction for crossing
1341 // Buffering: Leave it constant fot Performance issues
1342 Int_t zints[kNtb]; // Histograming of the z coordinate
1343 // Get 1 and second max probable coodinates in z
1344 Int_t zouts[2*kNtb];
1345 Float_t allowedz[kNtb]; // Allowed z for given time bin
1346 Float_t yres[kNtb]; // Residuals from reference
1347 //Float_t anglecor = fTilt * fZref[1]; // Correction to the angle
1349 Float_t pos[3*kNtb]; memset(pos, 0, 3*kNtb*sizeof(Float_t));
1350 Float_t *fX = &pos[0], *fY = &pos[kNtb], *fZ = &pos[2*kNtb];
1352 Int_t fN = 0; AliTRDcluster *c = 0x0;
1354 for (Int_t i = 0; i < AliTRDtrackerV1::GetNTimeBins(); i++) {
1356 if (!(c = fClusters[i])) continue;
1357 if(!c->IsInChamber()) continue;
1359 //yres[i] = fY[i] - fYref[0] - (fYref[1] + anglecor) * fX[i] + fTilt*(fZ[i] - fZref[0]);
1360 fX[i] = fX0 - c->GetX();
1363 yres[i] = fY[i] - fTilt*(fZ[i] - (fZref[0] - fX[i]*fZref[1]));
1364 zints[fN] = Int_t(fZ[i]);
1369 //printf("Exit fN < kClmin: fN = %d\n", fN);
1372 Int_t nz = AliTRDtrackerV1::Freq(fN, zints, zouts, kFALSE);
1373 Float_t fZProb = zouts[0];
1374 if (nz <= 1) zouts[3] = 0;
1375 if (zouts[1] + zouts[3] < kClmin) {
1376 //printf("Exit zouts[1] = %d, zouts[3] = %d\n",zouts[1],zouts[3]);
1380 // Z distance bigger than pad - length
1381 if (TMath::Abs(zouts[0]-zouts[2]) > 12.0) zouts[3] = 0;
1383 Int_t breaktime = -1;
1384 Bool_t mbefore = kFALSE;
1385 Int_t cumul[kNtb][2];
1386 Int_t counts[2] = { 0, 0 };
1388 if (zouts[3] >= 3) {
1391 // Find the break time allowing one chage on pad-rows
1392 // with maximal number of accepted clusters
1395 for (Int_t i = 0; i < AliTRDtrackerV1::GetNTimeBins(); i++) {
1396 cumul[i][0] = counts[0];
1397 cumul[i][1] = counts[1];
1398 if (TMath::Abs(fZ[i]-zouts[0]) < 2) counts[0]++;
1399 if (TMath::Abs(fZ[i]-zouts[2]) < 2) counts[1]++;
1402 for (Int_t i = 0; i < AliTRDtrackerV1::GetNTimeBins(); i++) {
1403 Int_t after = cumul[AliTRDtrackerV1::GetNTimeBins()][0] - cumul[i][0];
1404 Int_t before = cumul[i][1];
1405 if (after + before > maxcount) {
1406 maxcount = after + before;
1410 after = cumul[AliTRDtrackerV1::GetNTimeBins()-1][1] - cumul[i][1];
1411 before = cumul[i][0];
1412 if (after + before > maxcount) {
1413 maxcount = after + before;
1421 for (Int_t i = 0; i < AliTRDtrackerV1::GetNTimeBins()+1; i++) {
1422 if (i > breaktime) allowedz[i] = mbefore ? zouts[2] : zouts[0];
1423 if (i <= breaktime) allowedz[i] = (!mbefore) ? zouts[2] : zouts[0];
1426 if (((allowedz[0] > allowedz[AliTRDtrackerV1::GetNTimeBins()]) && (fZref[1] < 0)) ||
1427 ((allowedz[0] < allowedz[AliTRDtrackerV1::GetNTimeBins()]) && (fZref[1] > 0))) {
1429 // Tracklet z-direction not in correspondance with track z direction
1432 for (Int_t i = 0; i < AliTRDtrackerV1::GetNTimeBins()+1; i++) {
1433 allowedz[i] = zouts[0]; // Only longest taken
1439 // Cross pad -row tracklet - take the step change into account
1441 for (Int_t i = 0; i < AliTRDtrackerV1::GetNTimeBins()+1; i++) {
1442 if (!fClusters[i]) continue;
1443 if(!fClusters[i]->IsInChamber()) continue;
1444 if (TMath::Abs(fZ[i] - allowedz[i]) > 2) continue;
1446 //yres[i] = fY[i] - fYref[0] - (fYref[1] + anglecor) * fX[i] + fTilt*(fZ[i] - fZref[0]);
1447 yres[i] = fY[i] - fTilt*(fZ[i] - (fZref[0] - fX[i]*fZref[1]));
1448 // if (TMath::Abs(fZ[i] - fZProb) > 2) {
1449 // if (fZ[i] > fZProb) yres[i] += fTilt * fPadLength;
1450 // if (fZ[i] < fZProb) yres[i] -= fTilt * fPadLength;
1455 Double_t yres2[kNtb];
1458 for (Int_t i = 0; i < AliTRDtrackerV1::GetNTimeBins()+1; i++) {
1459 if (!fClusters[i]) continue;
1460 if(!fClusters[i]->IsInChamber()) continue;
1461 if (TMath::Abs(fZ[i] - allowedz[i]) > 2) continue;
1462 yres2[fN2] = yres[i];
1466 //printf("Exit fN2 < kClmin: fN2 = %d\n", fN2);
1470 AliMathBase::EvaluateUni(fN2,yres2,mean,sigma, Int_t(fN2*kRatio-2.));
1471 if (sigma < sigmaexp * 0.8) {
1474 //Float_t fSigmaY = sigma;
1489 for (Int_t i = 0; i < AliTRDtrackerV1::GetNTimeBins()+1; i++) {
1490 if (!fClusters[i]) continue;
1491 if (!fClusters[i]->IsInChamber()) continue;
1492 if (TMath::Abs(fZ[i] - allowedz[i]) > 2){fClusters[i] = 0x0; continue;}
1493 if (TMath::Abs(yres[i] - mean) > 4.0 * sigma){fClusters[i] = 0x0; continue;}
1496 fMPads += fClusters[i]->GetNPads();
1497 Float_t weight = 1.0;
1498 if (fClusters[i]->GetNPads() > 4) weight = 0.5;
1499 if (fClusters[i]->GetNPads() > 5) weight = 0.2;
1503 //printf("x = %7.3f dy = %7.3f fit %7.3f\n", x, yres[i], fY[i]-yres[i]);
1506 sumwx += x * weight;
1507 sumwx2 += x*x * weight;
1508 sumwy += weight * yres[i];
1509 sumwxy += weight * (yres[i]) * x;
1510 sumwz += weight * fZ[i];
1511 sumwxz += weight * fZ[i] * x;
1516 //printf("Exit fN2 < kClmin(2): fN2 = %d\n",fN2);
1520 fMeanz = sumwz / sumw;
1521 Float_t correction = 0;
1523 // Tracklet on boundary
1524 if (fMeanz < fZProb) correction = ycrosscor;
1525 if (fMeanz > fZProb) correction = -ycrosscor;
1528 Double_t det = sumw * sumwx2 - sumwx * sumwx;
1529 fYfit[0] = (sumwx2 * sumwy - sumwx * sumwxy) / det;
1530 fYfit[1] = (sumw * sumwxy - sumwx * sumwy) / det;
1533 for (Int_t i = 0; i < AliTRDtrackerV1::GetNTimeBins()+1; i++) {
1534 if (!TESTBIT(fUsable,i)) continue;
1535 Float_t delta = yres[i] - fYfit[0] - fYfit[1] * fX[i];
1536 fS2Y += delta*delta;
1538 fS2Y = TMath::Sqrt(fS2Y / Float_t(fN2-2));
1539 // TEMPORARY UNTIL covariance properly calculated
1540 fS2Y = TMath::Max(fS2Y, Float_t(.1));
1542 fZfit[0] = (sumwx2 * sumwz - sumwx * sumwxz) / det;
1543 fZfit[1] = (sumw * sumwxz - sumwx * sumwz) / det;
1544 // fYfitR[0] += fYref[0] + correction;
1545 // fYfitR[1] += fYref[1];
1546 // fYfit[0] = fYfitR[0];
1547 fYfit[1] = -fYfit[1];
1552 //___________________________________________________________________
1553 void AliTRDseedV1::Print(Option_t *o) const
1556 // Printing the seedstatus
1559 AliInfo(Form("Det[%3d] Tilt[%+6.2f] Pad[%5.2f]", fDet, fTilt, fPadLength));
1560 AliInfo(Form("N[%2d] Nused[%2d] Nshared[%2d]", GetN(), GetNUsed(), GetNShared()));
1561 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]));
1562 AliInfo(Form("Ref y[%7.2f] z[%7.2f] dydx[%5.2f] dzdx[%5.2f]", fYref[0], fZref[0], fYref[1], fZref[1]))
1565 if(strcmp(o, "a")!=0) return;
1567 AliTRDcluster* const* jc = &fClusters[0];
1568 for(int ic=0; ic<kNclusters; ic++, jc++) {
1569 if(!(*jc)) continue;
1575 //___________________________________________________________________
1576 Bool_t AliTRDseedV1::IsEqual(const TObject *o) const
1578 // Checks if current instance of the class has the same essential members
1581 if(!o) return kFALSE;
1582 const AliTRDseedV1 *inTracklet = dynamic_cast<const AliTRDseedV1*>(o);
1583 if(!inTracklet) return kFALSE;
1585 for (Int_t i = 0; i < 2; i++){
1586 if ( fYref[i] != inTracklet->fYref[i] ) return kFALSE;
1587 if ( fZref[i] != inTracklet->fZref[i] ) return kFALSE;
1590 if ( fS2Y != inTracklet->fS2Y ) return kFALSE;
1591 if ( fTilt != inTracklet->fTilt ) return kFALSE;
1592 if ( fPadLength != inTracklet->fPadLength ) return kFALSE;
1594 for (Int_t i = 0; i < kNclusters; i++){
1595 // if ( fX[i] != inTracklet->GetX(i) ) return kFALSE;
1596 // if ( fY[i] != inTracklet->GetY(i) ) return kFALSE;
1597 // if ( fZ[i] != inTracklet->GetZ(i) ) return kFALSE;
1598 if ( fIndexes[i] != inTracklet->fIndexes[i] ) return kFALSE;
1600 // if ( fUsable != inTracklet->fUsable ) return kFALSE;
1602 for (Int_t i=0; i < 2; i++){
1603 if ( fYfit[i] != inTracklet->fYfit[i] ) return kFALSE;
1604 if ( fZfit[i] != inTracklet->fZfit[i] ) return kFALSE;
1605 if ( fLabels[i] != inTracklet->fLabels[i] ) return kFALSE;
1608 /* if ( fMeanz != inTracklet->GetMeanz() ) return kFALSE;
1609 if ( fZProb != inTracklet->GetZProb() ) return kFALSE;*/
1610 if ( fN != inTracklet->fN ) return kFALSE;
1611 //if ( fNUsed != inTracklet->fNUsed ) return kFALSE;
1612 //if ( fFreq != inTracklet->GetFreq() ) return kFALSE;
1613 //if ( fNChange != inTracklet->GetNChange() ) return kFALSE;
1615 if ( fC != inTracklet->fC ) return kFALSE;
1616 //if ( fCC != inTracklet->GetCC() ) return kFALSE;
1617 if ( fChi2 != inTracklet->fChi2 ) return kFALSE;
1618 // if ( fChi2Z != inTracklet->GetChi2Z() ) return kFALSE;
1620 if ( fDet != inTracklet->fDet ) return kFALSE;
1621 if ( fMom != inTracklet->fMom ) return kFALSE;
1622 if ( fdX != inTracklet->fdX ) return kFALSE;
1624 for (Int_t iCluster = 0; iCluster < kNclusters; iCluster++){
1625 AliTRDcluster *curCluster = fClusters[iCluster];
1626 AliTRDcluster *inCluster = inTracklet->fClusters[iCluster];
1627 if (curCluster && inCluster){
1628 if (! curCluster->IsEqual(inCluster) ) {
1629 curCluster->Print();
1634 // if one cluster exists, and corresponding
1635 // in other tracklet doesn't - return kFALSE
1636 if(curCluster || inCluster) return kFALSE;