1 // $Id: AliHLTTPCCAMerger.cxx 30732 2009-01-22 23:02:02Z sgorbuno $
2 // **************************************************************************
3 // This file is property of and copyright by the ALICE HLT Project *
4 // ALICE Experiment at CERN, All rights reserved. *
6 // Primary Authors: Sergey Gorbunov <sergey.gorbunov@kip.uni-heidelberg.de> *
7 // Ivan Kisel <kisel@kip.uni-heidelberg.de> *
8 // for The ALICE HLT Project. *
10 // Permission to use, copy, modify and distribute this software and its *
11 // documentation strictly for non-commercial purposes is hereby granted *
12 // without fee, provided that the above copyright notice appears in all *
13 // copies and that both the copyright notice and this permission notice *
14 // appear in the supporting documentation. The authors make no claims *
15 // about the suitability of this software for any purpose. It is *
16 // provided "as is" without express or implied warranty. *
18 //***************************************************************************
21 #include "AliHLTTPCCASliceTrack.h"
22 #include "AliHLTTPCCATracker.h"
23 #include "AliHLTTPCCAGBTrack.h"
24 #include "AliHLTTPCCATrackParam.h"
26 #include "AliHLTTPCCAMerger.h"
28 #include "AliHLTTPCCAMath.h"
29 #include "TStopwatch.h"
31 #include "AliHLTTPCCATrackParam.h"
32 #include "AliHLTTPCCASliceTrack.h"
33 #include "AliHLTTPCCASliceOutput.h"
34 #include "AliHLTTPCCAMergedTrack.h"
35 #include "AliHLTTPCCAMergerOutput.h"
36 #include "AliHLTTPCCADataCompressor.h"
37 #include "AliHLTTPCCAParam.h"
41 class AliHLTTPCCAMerger::AliHLTTPCCAClusterInfo
46 UInt_t ISlice() const { return fISlice; }
47 UInt_t IRow() const { return fIRow; }
48 UInt_t IClu() const { return fIClu; }
49 UChar_t PackedAmp() const { return fPackedAmp; }
50 Float_t Y() const { return fY; }
51 Float_t Z() const { return fZ; }
52 Float_t Err2Y() const { return fErr2Y; }
53 Float_t Err2Z() const { return fErr2Z; }
55 void SetISlice ( UInt_t v ) { fISlice = v; }
56 void SetIRow ( UInt_t v ) { fIRow = v; }
57 void SetIClu ( UInt_t v ) { fIClu = v; }
58 void SetPackedAmp ( UChar_t v ) { fPackedAmp = v; }
59 void SetY ( Float_t v ) { fY = v; }
60 void SetZ ( Float_t v ) { fZ = v; }
61 void SetErr2Y ( Float_t v ) { fErr2Y = v; }
62 void SetErr2Z ( Float_t v ) { fErr2Z = v; }
66 UInt_t fISlice; // slice number
67 UInt_t fIRow; // row number
68 UInt_t fIClu; // cluster number
69 UChar_t fPackedAmp; // packed cluster amplitude
70 Float_t fY; // y position (slice coord.system)
71 Float_t fZ; // z position (slice coord.system)
72 Float_t fErr2Y; // Squared measurement error of y position
73 Float_t fErr2Z; // Squared measurement error of z position
77 class AliHLTTPCCAMerger::AliHLTTPCCASliceTrackInfo
82 const AliHLTTPCCATrackParam &InnerParam() const { return fInnerParam; }
83 const AliHLTTPCCATrackParam &OuterParam() const { return fOuterParam; }
84 Float_t InnerAlpha() const { return fInnerAlpha; }
85 Float_t OuterAlpha() const { return fOuterAlpha; }
86 Int_t NClusters() const { return fNClusters; }
87 Int_t FirstClusterRef() const { return fFirstClusterRef; }
88 Int_t PrevNeighbour() const { return fPrevNeighbour; }
89 Int_t NextNeighbour() const { return fNextNeighbour; }
90 Bool_t Used() const { return fUsed; }
92 void SetInnerParam( const AliHLTTPCCATrackParam &v ) { fInnerParam = v; }
93 void SetOuterParam( const AliHLTTPCCATrackParam &v ) { fOuterParam = v; }
94 void SetInnerAlpha( Float_t v ) { fInnerAlpha = v; }
95 void SetOuterAlpha( Float_t v ) { fOuterAlpha = v; }
96 void SetNClusters ( Int_t v ) { fNClusters = v; }
97 void SetFirstClusterRef( Int_t v ) { fFirstClusterRef = v; }
98 void SetPrevNeighbour( Int_t v ) { fPrevNeighbour = v; }
99 void SetNextNeighbour( Int_t v ) { fNextNeighbour = v; }
100 void SetUsed( Bool_t v ) { fUsed = v; }
104 AliHLTTPCCATrackParam fInnerParam; // inner parameters
105 AliHLTTPCCATrackParam fOuterParam; // outer parameters
106 Float_t fInnerAlpha; // alpha angle for inner parameters
107 Float_t fOuterAlpha; // alpha angle for outer parameters
108 Int_t fNClusters; // N clusters
109 Int_t fFirstClusterRef; // index of the first track cluster in the global cluster array
110 Int_t fPrevNeighbour; // neighbour in the previous slise
111 Int_t fNextNeighbour; // neighbour in the next slise
112 Bool_t fUsed; // is the slice track already merged
117 class AliHLTTPCCAMerger::AliHLTTPCCABorderTrack
122 const AliHLTTPCCATrackParam &Param() const { return fParam; }
123 Int_t TrackID() const { return fTrackID; }
124 Int_t NClusters() const { return fNClusters; }
125 Int_t IRow() const { return fIRow; }
126 Float_t X() const { return fX; }
127 Bool_t OK() const { return fOK; }
129 void SetParam ( const AliHLTTPCCATrackParam &v ) { fParam = v; }
130 void SetTrackID ( Int_t v ) { fTrackID = v; }
131 void SetNClusters ( Int_t v ) { fNClusters = v; }
132 void SetIRow ( Int_t v ) { fIRow = v; }
133 void SetX ( Float_t v ) { fX = v; }
134 void SetOK ( Bool_t v ) { fOK = v; }
138 AliHLTTPCCATrackParam fParam; // track parameters at the border
139 Int_t fTrackID; // track index
140 Int_t fNClusters; // n clusters
141 Int_t fIRow; // row number of the closest cluster
142 Float_t fX; // X coordinate of the closest cluster
143 Bool_t fOK; // is the track rotated and extrapolated correctly
149 AliHLTTPCCAMerger::AliHLTTPCCAMerger()
163 AliHLTTPCCAMerger::AliHLTTPCCAMerger(const AliHLTTPCCAMerger&)
175 const AliHLTTPCCAMerger &AliHLTTPCCAMerger::operator=(const AliHLTTPCCAMerger&) const
181 AliHLTTPCCAMerger::~AliHLTTPCCAMerger()
184 if( fTrackInfos ) delete[] fTrackInfos;
185 if( fClusterInfos ) delete[] fClusterInfos;
186 if( fOutput ) delete[] ((char*)(fOutput));
189 void AliHLTTPCCAMerger::Clear()
191 for ( int i = 0; i < fgkNSlices; ++i ) {
197 void AliHLTTPCCAMerger::SetSliceData( int index, const AliHLTTPCCASliceOutput *SliceData )
199 fkSlices[index] = SliceData;
202 void AliHLTTPCCAMerger::Reconstruct()
204 //* main merging routine
210 void AliHLTTPCCAMerger::UnpackSlices()
212 //* unpack the cluster information from the slice tracks and initialize track info array
214 // get N tracks and N clusters in event
216 Int_t nTracksTotal=0;
217 Int_t nTrackClustersTotal=0;
218 for( Int_t iSlice=0; iSlice<fgkNSlices; iSlice++ ){
219 if( !fkSlices[iSlice] ) continue;
220 nTracksTotal+=fkSlices[iSlice]->NTracks();
221 nTrackClustersTotal+=fkSlices[iSlice]->NTrackClusters();
224 // book/clean memory if necessary
226 if( nTracksTotal>fMaxTrackInfos || ( fMaxTrackInfos>100 && nTracksTotal< 0.5*fMaxTrackInfos ) ){
227 if( fTrackInfos ) delete[] fTrackInfos;
228 fMaxTrackInfos = (Int_t ) (nTracksTotal*1.2);
229 fTrackInfos = new AliHLTTPCCASliceTrackInfo[fMaxTrackInfos];
232 if( nTrackClustersTotal>fMaxClusterInfos || ( fMaxClusterInfos>1000 && nTrackClustersTotal< 0.5*fMaxClusterInfos ) ){
233 if( fClusterInfos ) delete[] fClusterInfos;
234 fMaxClusterInfos = (Int_t ) (nTrackClustersTotal*1.2);
235 fClusterInfos = new AliHLTTPCCAClusterInfo [fMaxClusterInfos];
238 if( fOutput ) delete[] ( (char*)(fOutput));
239 Int_t size = fOutput->EstimateSize(nTracksTotal, nTrackClustersTotal);
240 fOutput = (AliHLTTPCCAMergerOutput*)(new float2[size/sizeof(float2)+1]);
243 // unpack track and cluster information
245 Int_t nTracksCurrent = 0;
246 Int_t nClustersCurrent = 0;
248 for( Int_t iSlice=0; iSlice<fgkNSlices; iSlice++ ){
250 fSliceTrackInfoStart[ iSlice ] = nTracksCurrent;
251 fSliceNTrackInfos[ iSlice ] = 0;
253 if( !fkSlices[iSlice] ) continue;
255 const AliHLTTPCCASliceOutput &slice = *(fkSlices[iSlice]);
257 for( Int_t itr=0; itr<slice.NTracks(); itr++ ){
259 const AliHLTTPCCASliceTrack &sTrack = slice.Track( itr );
260 AliHLTTPCCATrackParam t0 = sTrack.Param();
263 for( Int_t iTrClu=0; iTrClu<sTrack.NClusters(); iTrClu++ ){
265 // unpack cluster information
267 AliHLTTPCCAClusterInfo &clu = fClusterInfos[nClustersCurrent + nCluNew];
268 Int_t ic = sTrack.FirstClusterRef() + iTrClu;
270 clu.SetISlice( iSlice );
271 clu.SetIRow( AliHLTTPCCADataCompressor::IDrc2IRow( slice.ClusterIDrc( ic ) ) );
272 clu.SetIClu( AliHLTTPCCADataCompressor::IDrc2IClu( slice.ClusterIDrc( ic ) ) );
273 clu.SetPackedAmp( slice.ClusterPackedAmp( ic ) );
274 float2 yz = slice.ClusterUnpackedYZ( ic );
278 if( !t0.TransportToX( fSliceParam.RowX( clu.IRow() ), .999 ) ) continue;
280 Float_t err2Y, err2Z;
281 fSliceParam.GetClusterErrors2( clu.IRow(), clu.Z(), t0.SinPhi(), t0.CosPhi(), t0.DzDs(), err2Y, err2Z );
283 clu.SetErr2Y( err2Y );
284 clu.SetErr2Z( err2Z );
288 if( nCluNew<.8*sTrack.NClusters() ) continue;
293 Int_t nHits = nCluNew;
294 for( Int_t i=0; i<nHits; i++ ) hits[i] = nClustersCurrent + i;
296 AliHLTTPCCATrackParam startPoint = sTrack.Param();
297 AliHLTTPCCATrackParam endPoint = startPoint;
298 Float_t startAlpha = fSliceParam.Alpha( iSlice );
299 Float_t endAlpha = startAlpha;
301 if( !FitTrack( endPoint, endAlpha, startPoint, startAlpha, hits, nHits, 0 ) ) continue;
303 startPoint = endPoint;
304 startAlpha = endAlpha;
305 if( !FitTrack( startPoint, startAlpha, endPoint, endAlpha, hits, nHits, 1 ) ) continue;
307 if( nHits<.8*sTrack.NClusters() ) continue;
311 AliHLTTPCCASliceTrackInfo &track = fTrackInfos[nTracksCurrent];
313 track.SetInnerParam( startPoint );
314 track.SetInnerAlpha( startAlpha );
315 track.SetOuterParam( endPoint );
316 track.SetOuterAlpha( endAlpha );
317 track.SetFirstClusterRef( nClustersCurrent );
318 track.SetNClusters( nHits );
319 track.SetPrevNeighbour( -1 );
320 track.SetNextNeighbour( -1 );
323 for( Int_t i=0; i<nHits; i++ )
324 fClusterInfos[nClustersCurrent + i] = fClusterInfos[hits[i]];
326 fSliceNTrackInfos[ iSlice ]++;
327 nClustersCurrent+=nHits;
334 Bool_t AliHLTTPCCAMerger::FitTrack( AliHLTTPCCATrackParam &T, Float_t &Alpha,
335 AliHLTTPCCATrackParam t0, Float_t Alpha0,
336 Int_t hits[], Int_t &NTrackHits, Bool_t dir )
340 AliHLTTPCCATrackParam::AliHLTTPCCATrackFitParam fitPar;
341 AliHLTTPCCATrackParam t = t0;
345 t0.CalculateFitParameters( fitPar, fSliceParam.Bz() );
350 for( Int_t ihit=0; ihit<NTrackHits; ihit++){
352 Int_t jhit = dir ?(NTrackHits-1-ihit) :ihit;
353 AliHLTTPCCAClusterInfo &h = fClusterInfos[hits[jhit]];
355 Int_t iSlice = h.ISlice();
357 Float_t sliceAlpha = fSliceParam.Alpha( iSlice );
359 if( CAMath::Abs( sliceAlpha - Alpha0)>1.e-4 ){
360 if( ! t.RotateNoCos( sliceAlpha - Alpha0, t0, .999 ) ) continue;
364 Float_t x = fSliceParam.RowX( h.IRow() );
366 if( !t.TransportToXWithMaterial( x, t0, fitPar ) ) continue;
386 t0.CalculateFitParameters( fitPar, fSliceParam.Bz() );
389 if( !t.Filter2NoCos( h.Y(), h.Z(), h.Err2Y(), h.Err2Z() ) ) continue;
393 hitsNew[nHitsNew++] = hits[jhit];
396 if( CAMath::Abs(t.Kappa())<1.e-8 ) t.SetKappa( 1.e-8 );
400 const Float_t *c = t.Cov();
401 for( Int_t i=0; i<15; i++ ) ok = ok && finite(c[i]);
402 for( Int_t i=0; i<5; i++ ) ok = ok && finite(t.Par()[i]);
403 ok = ok && (t.GetX()>50);
405 if( c[0]<=0 || c[2]<=0 || c[5]<=0 || c[9]<=0 || c[14]<=0 ) ok = 0;
406 if( c[0]>5. || c[2]>5. || c[5]>2. || c[9]>2 || c[14]>2 ) ok = 0;
408 if( CAMath::Abs(t.SinPhi())>.99 ) ok = 0;
409 else if( t0.CosPhi()>=0 ) t.SetCosPhi( CAMath::Sqrt(1.-t.SinPhi()*t.SinPhi()) );
410 else t.SetCosPhi( -CAMath::Sqrt(1.-t.SinPhi()*t.SinPhi()) );
415 NTrackHits = nHitsNew;
416 for( Int_t i=0; i<NTrackHits; i++ ){
417 hits[dir ?(NTrackHits-1-i) :i] = hitsNew[i];
424 Float_t AliHLTTPCCAMerger::GetChi2( Float_t x1, Float_t y1, Float_t a00, Float_t a10, Float_t a11,
425 Float_t x2, Float_t y2, Float_t b00, Float_t b10, Float_t b11 )
427 //* Calculate Chi2/ndf deviation
429 Float_t d[2]={ x1-x2, y1-y2 };
431 Float_t mSi[3] = { a00 + b00, a10 + b10, a11 + b11 };
433 Float_t s = ( mSi[0]*mSi[2] - mSi[1]*mSi[1] );
435 if( s < 1.E-10 ) return 10000.;
437 Float_t mS[3] = { mSi[2], -mSi[1], mSi[0] };
439 return TMath::Abs( ( ( mS[0]*d[0] + mS[1]*d[1] )*d[0]
440 +(mS[1]*d[0] + mS[2]*d[1] )*d[1] )/s/2);
446 void AliHLTTPCCAMerger::MakeBorderTracks( Int_t iSlice, Int_t iBorder, AliHLTTPCCABorderTrack B[], Int_t &nB )
448 //* prepare slice tracks for merging with next/previous/same sector
449 //* each track transported to the border line,
450 //* in some cases both inner and outer parameters of the track are transported
452 static int statAll=0, statOK=0;
454 Float_t dAlpha = fSliceParam.DAlpha() /2;
457 if( iBorder==0 ){ // transport to the left age of the sector and rotate horisontally
458 dAlpha = dAlpha - CAMath::Pi()/2 ;
459 } else if( iBorder==1 ){ // transport to the right age of the sector and rotate horisontally
460 dAlpha = -dAlpha - CAMath::Pi()/2 ;
461 } else if( iBorder==2 ){ // transport to the left age of the sector and rotate vertically
463 x0 = fSliceParam.RowX( 63 );
464 }else if( iBorder==3 ){ // transport to the right age of the sector and rotate vertically
466 x0 = fSliceParam.RowX( 63 );
467 } else if( iBorder==4 ){ // transport to the middle of the sector, w/o rotation
469 x0 = fSliceParam.RowX(63);
472 for (Int_t itr=0; itr<fSliceNTrackInfos[iSlice]; itr++) {
474 const AliHLTTPCCASliceTrackInfo &track = fTrackInfos[ fSliceTrackInfoStart[iSlice] + itr ];
476 AliHLTTPCCATrackParam t0 = track.InnerParam();
477 AliHLTTPCCATrackParam t1 = track.OuterParam();
479 const Float_t maxSin = CAMath::Sin(60./180.*CAMath::Pi());
481 Bool_t ok0 = t0.Rotate( dAlpha, maxSin );
482 Bool_t ok1 = t1.Rotate( dAlpha, maxSin );
485 Bool_t do1 = ok1 && ( !ok0 || t1.CosPhi()*t0.CosPhi()<0 );
487 if( ok0 && !do1 && ok1 && (t1.X() < t0.X()) ){
493 AliHLTTPCCABorderTrack &b = B[nB];
495 if( t0.TransportToX( x0, maxSin ) ){
498 b.SetNClusters( track.NClusters() );
499 b.SetIRow( fClusterInfos[ track.FirstClusterRef() + 0 ].IRow() );
505 AliHLTTPCCABorderTrack &b = B[nB];
507 if( t1.TransportToX( x0, maxSin ) ){
510 b.SetNClusters( track.NClusters() );
511 b.SetIRow( fClusterInfos[ track.FirstClusterRef() + track.NClusters()-1 ].IRow() );
516 if( do0 || do1 ) statOK++;
523 void AliHLTTPCCAMerger::SplitBorderTracks( Int_t iSlice1, AliHLTTPCCABorderTrack B1[], Int_t N1,
524 Int_t iSlice2, AliHLTTPCCABorderTrack B2[], Int_t N2
527 //* split two sets of tracks
529 Float_t factor2ys = 1.;//1.5;//SG!!!
530 Float_t factor2zt = 1.;//1.5;//SG!!!
531 Float_t factor2k = 2.0;//2.2;
533 factor2k = 3.5*3.5*factor2k*factor2k;
534 factor2ys = 3.5*3.5*factor2ys*factor2ys;
535 factor2zt = 3.5*3.5*factor2zt*factor2zt;
537 Int_t minNPartHits = 10;//SG!!!
538 Int_t minNTotalHits = 20;
540 //Float_t maxDX = fSliceParam.RowX(40) - fSliceParam.RowX(0);
542 for (Int_t i1=0; i1<N1; i1++) {
543 AliHLTTPCCABorderTrack &b1 = B1[i1];
544 if( !b1.OK() ) continue;
545 if( b1.NClusters() < minNPartHits ) continue;
546 const AliHLTTPCCATrackParam &t1 = b1.Param();
549 Int_t start2 = (iSlice1!=iSlice2) ?0 :i1+1;
550 for (Int_t i2=start2; i2<N2; i2++) {
551 AliHLTTPCCABorderTrack &b2 = B2[i2];
552 if( !b2.OK() ) continue;
553 if( b2.NClusters() < minNPartHits ) continue;
554 if( b2.NClusters() < lBest2 ) continue;
555 if( b1.NClusters() + b2.NClusters() < minNTotalHits ) continue;
557 //if( TMath::Abs(b1.fX - b2.fX)>maxDX ) continue;
559 const AliHLTTPCCATrackParam &t2 = b2.Param();
561 Float_t c= t2.CosPhi()*t1.CosPhi()>=0 ?1 :-1;
562 Float_t dk = t2.Kappa() - c*t1.Kappa();
563 Float_t s2k = t2.Err2Kappa() + t1.Err2Kappa();
565 if( dk*dk>factor2k*s2k ) continue;
568 Float_t chi2ys = GetChi2( t1.Y(),c*t1.SinPhi(),t1.Cov()[0],c*t1.Cov()[3],t1.Cov()[5],
569 t2.Y(), t2.SinPhi(),t2.Cov()[0], t2.Cov()[3],t2.Cov()[5] );
571 if( chi2ys>factor2ys ) continue;
573 Float_t chi2zt = GetChi2( t1.Z(),c*t1.DzDs(),t1.Cov()[2],c*t1.Cov()[7],t1.Cov()[9],
574 t2.Z(), t2.DzDs(),t2.Cov()[2], t2.Cov()[7],t2.Cov()[9] );
576 if( chi2zt>factor2zt ) continue;
578 lBest2 = b2.NClusters();
579 iBest2 = b2.TrackID();
582 if( iBest2 <0 ) continue;
584 AliHLTTPCCASliceTrackInfo &newTrack1 = fTrackInfos[fSliceTrackInfoStart[iSlice1]+b1.TrackID() ];
585 AliHLTTPCCASliceTrackInfo &newTrack2 = fTrackInfos[fSliceTrackInfoStart[iSlice2]+iBest2 ];
587 Int_t old1 = newTrack2.PrevNeighbour();
590 AliHLTTPCCASliceTrackInfo &oldTrack1 = fTrackInfos[fSliceTrackInfoStart[iSlice1]+old1];
591 if( oldTrack1.NClusters() < newTrack1.NClusters() ){
592 newTrack2.SetPrevNeighbour(-1);
593 oldTrack1.SetNextNeighbour(-1);
596 Int_t old2 = newTrack1.NextNeighbour();
598 AliHLTTPCCASliceTrackInfo &oldTrack2 = fTrackInfos[fSliceTrackInfoStart[iSlice2]+old2];
599 if( oldTrack2.NClusters() < newTrack2.NClusters() ){
600 oldTrack2.SetPrevNeighbour(-1);
603 newTrack1.SetNextNeighbour(iBest2);
604 newTrack2.SetPrevNeighbour(b1.TrackID());
610 void AliHLTTPCCAMerger::Merging()
612 //* track merging between slices
614 fOutput->SetNTracks( 0 );
615 fOutput->SetNTrackClusters( 0 );
616 fOutput->SetPointers();
619 // for each slice set number of the next neighbouring slice
621 Int_t nextSlice[100], prevSlice[100];
623 for( Int_t iSlice=0; iSlice<fgkNSlices; iSlice++ ){
624 nextSlice[iSlice] = iSlice + 1;
625 prevSlice[iSlice] = iSlice - 1;
627 Int_t mid = fgkNSlices/2 - 1 ;
628 Int_t last = fgkNSlices - 1 ;
629 if( mid<0 ) mid = 0; // to avoid compiler warning
630 if( last<0 ) last = 0; //
631 nextSlice[ mid ] = 0;
632 prevSlice[ 0 ] = mid;
633 nextSlice[ last ] = fgkNSlices/2;
634 prevSlice[ fgkNSlices/2 ] = last;
636 Int_t maxNSliceTracks = 0;
637 for( Int_t iSlice=0; iSlice<fgkNSlices; iSlice++ ){
638 if( maxNSliceTracks < fSliceNTrackInfos[iSlice] ) maxNSliceTracks = fSliceNTrackInfos[iSlice];
641 if(1){// merging track segments withing one slice
643 AliHLTTPCCABorderTrack bord[maxNSliceTracks*10];
645 AliHLTTPCCASliceTrackInfo *tmpT = new AliHLTTPCCASliceTrackInfo[maxNSliceTracks];
646 AliHLTTPCCAClusterInfo *tmpH = new AliHLTTPCCAClusterInfo[fMaxClusterInfos];
648 for( Int_t iSlice=0; iSlice<fgkNSlices; iSlice++ ){
651 MakeBorderTracks( iSlice, 4, bord, nBord );
652 SplitBorderTracks( iSlice, bord, nBord, iSlice, bord, nBord );
655 Int_t sliceFirstClusterRef = 0;
656 for( Int_t itr=0; itr<fSliceNTrackInfos[iSlice]; itr++ ){
657 AliHLTTPCCASliceTrackInfo &track = fTrackInfos[ fSliceTrackInfoStart[iSlice]+itr];
658 if( itr==0 ) sliceFirstClusterRef = track.FirstClusterRef();
659 track.SetPrevNeighbour( -1 );
660 if( track.NextNeighbour() == -2 ){
661 track.SetNextNeighbour( -1 );
664 AliHLTTPCCASliceTrackInfo &trackNew = tmpT[nTr];
666 trackNew.SetFirstClusterRef( sliceFirstClusterRef + nH);
668 for( Int_t ih=0; ih<track.NClusters(); ih++ ) tmpH[nH+ih] = fClusterInfos[track.FirstClusterRef()+ih];
670 nH+=track.NClusters();
672 int jtr = track.NextNeighbour();
674 if( jtr<0 ) continue;
675 AliHLTTPCCASliceTrackInfo &neighTrack = fTrackInfos[ fSliceTrackInfoStart[iSlice]+jtr];
677 track.SetNextNeighbour(-1);
678 neighTrack.SetNextNeighbour(-2);
680 for( Int_t ih=0; ih<neighTrack.NClusters(); ih++ )
681 tmpH[nH+ih] = fClusterInfos[neighTrack.FirstClusterRef()+ih];
683 trackNew.SetNClusters( trackNew.NClusters() + neighTrack.NClusters() );
684 trackNew.SetNextNeighbour( -1 );
685 nH+=neighTrack.NClusters();
686 if( neighTrack.InnerParam().X() < track.InnerParam().X() ) trackNew.SetInnerParam( neighTrack.InnerParam());
687 if( neighTrack.OuterParam().X() > track.OuterParam().X() ) trackNew.SetOuterParam( neighTrack.OuterParam());
690 fSliceNTrackInfos[iSlice] = nTr;
691 for( Int_t itr=0; itr<nTr; itr++ ) fTrackInfos[ fSliceTrackInfoStart[iSlice]+itr] = tmpT[itr];
692 for( Int_t ih=0; ih<nH; ih++ ) fClusterInfos[sliceFirstClusterRef + ih] = tmpH[ih];
700 //* merging tracks between slices
703 // arrays for the rotated track parameters
705 AliHLTTPCCABorderTrack
706 *bCurr0 = new AliHLTTPCCABorderTrack[maxNSliceTracks*10],
707 *bNext0 = new AliHLTTPCCABorderTrack[maxNSliceTracks*10],
708 *bCurr = new AliHLTTPCCABorderTrack[maxNSliceTracks*10],
709 *bNext = new AliHLTTPCCABorderTrack[maxNSliceTracks*10];
711 for( Int_t iSlice=0; iSlice<fgkNSlices; iSlice++ ){
713 Int_t jSlice = nextSlice[iSlice];
715 Int_t nCurr0 = 0, nNext0 = 0;
716 Int_t nCurr = 0, nNext = 0;
718 MakeBorderTracks( iSlice, 0, bCurr, nCurr );
719 MakeBorderTracks( jSlice, 1, bNext, nNext );
720 MakeBorderTracks( iSlice, 2, bCurr0, nCurr0 );
721 MakeBorderTracks( jSlice, 3, bNext0, nNext0 );
723 SplitBorderTracks( iSlice, bCurr0, nCurr0, jSlice, bNext0, nNext0 );
724 SplitBorderTracks( iSlice, bCurr, nCurr, jSlice, bNext, nNext );
727 if( bCurr0 ) delete[] bCurr0;
728 if( bNext0 ) delete[] bNext0;
729 if( bCurr ) delete[] bCurr;
730 if( bNext ) delete[] bNext;
733 //static Int_t nRejected = 0;
735 Int_t nOutTracks = 0;
736 Int_t nOutTrackClusters = 0;
738 AliHLTTPCCAMergedTrack *outTracks = new AliHLTTPCCAMergedTrack[fMaxTrackInfos];
739 UInt_t *outClusterIDsrc = new UInt_t [fMaxClusterInfos];
740 UChar_t *outClusterPackedAmp = new UChar_t [fMaxClusterInfos];
742 for( Int_t iSlice = 0; iSlice<fgkNSlices; iSlice++ ){
744 for( Int_t itr=0; itr<fSliceNTrackInfos[iSlice]; itr++ ){
746 AliHLTTPCCASliceTrackInfo &track = fTrackInfos[fSliceTrackInfoStart[iSlice]+itr];
748 if( track.Used() ) continue;
749 if( track.PrevNeighbour()>=0 ) continue;
751 AliHLTTPCCATrackParam startPoint = track.InnerParam(), endPoint = track.OuterParam();
752 Float_t startAlpha = track.InnerAlpha(), endAlpha = track.OuterAlpha();
755 Int_t firstHit = 1000;
757 Int_t jSlice = iSlice;
762 for( Int_t jhit=0; jhit<track.NClusters(); jhit++){
763 Int_t id = track.FirstClusterRef() + jhit;
764 hits[firstHit+jhit] = id;
766 nHits=track.NClusters();
767 jtr = track.NextNeighbour();
768 jSlice = nextSlice[iSlice];
772 AliHLTTPCCASliceTrackInfo &segment = fTrackInfos[fSliceTrackInfoStart[jSlice]+jtr];
773 if( segment.Used() ) break;
774 segment.SetUsed( 1 );
776 Int_t startHit = firstHit+ nHits;
777 Float_t d00 = startPoint.GetDistXZ2(segment.InnerParam() );
778 Float_t d01 = startPoint.GetDistXZ2(segment.OuterParam() );
779 Float_t d10 = endPoint.GetDistXZ2(segment.InnerParam() );
780 Float_t d11 = endPoint.GetDistXZ2(segment.OuterParam() );
781 if( d00<=d01 && d00<=d10 && d00<=d11 ){
782 startPoint = segment.OuterParam();
783 startAlpha = segment.OuterAlpha();
785 firstHit -= segment.NClusters();
787 }else if( d01<=d10 && d01<=d11 ){
788 startPoint = segment.InnerParam();
789 startAlpha = segment.InnerAlpha();
791 firstHit -= segment.NClusters();
793 }else if( d10<=d11 ){
794 endPoint = segment.OuterParam();
795 endAlpha = segment.OuterAlpha();
798 endPoint = segment.InnerParam();
799 endAlpha = segment.InnerAlpha();
803 for( Int_t jhit=0; jhit<segment.NClusters(); jhit++){
804 Int_t id = segment.FirstClusterRef() + jhit;
805 hits[startHit+(dir ?(segment.NClusters()-1-jhit) :jhit)] = id;
807 nHits+=segment.NClusters();
808 jtr = segment.NextNeighbour();
809 jSlice = nextSlice[jSlice];
812 if( endPoint.X() < startPoint.X() ){ // swap
813 for( Int_t i=0; i<nHits; i++ ) hits[i] = hits[firstHit+nHits-1-i];
817 if( nHits < 30 ) continue; //SG!!!
823 endPoint = startPoint;
824 if( !FitTrack( endPoint, endAlpha, startPoint, startAlpha, hits+firstHit, nHits, 0 ) ) continue;
825 if( !FitTrack( startPoint, startAlpha, endPoint, endAlpha, hits+firstHit, nHits, 1 ) ) continue;
827 if( nHits < 30 ) continue; //SG!!!
829 AliHLTTPCCATrackParam &p = startPoint;
830 AliHLTTPCCATrackParam::AliHLTTPCCATrackFitParam fitPar;
831 p.CalculateFitParameters( fitPar, fSliceParam.Bz() );
834 Double_t xTPC=83.65; //SG!!!
835 Double_t dAlpha = 0.00609235;
837 if( p.TransportToXWithMaterial( xTPC, fitPar ) ){
839 Double_t ymax=xTPC*CAMath::Tan(dAlpha/2.);
841 if( p.Rotate( dAlpha ) ){ startAlpha+=dAlpha; p.TransportToXWithMaterial( xTPC, fitPar ); }
842 } else if (y <-ymax) {
843 if( p.Rotate( -dAlpha ) ){ startAlpha-=dAlpha; p.TransportToXWithMaterial( xTPC, fitPar );}
851 const Float_t *c = p.Cov();
852 for( Int_t i=0; i<15; i++ ) ok = ok && finite(c[i]);
853 for( Int_t i=0; i<5; i++ ) ok = ok && finite(p.Par()[i]);
854 ok = ok && (p.GetX()>50);
856 if( c[0]<=0 || c[2]<=0 || c[5]<=0 || c[9]<=0 || c[14]<=0 ) ok = 0;
857 if( c[0]>5. || c[2]>5. || c[5]>2. || c[9]>2 || c[14]>2 ) ok = 0;
861 AliHLTTPCCAMergedTrack &mergedTrack = outTracks[nOutTracks];
862 mergedTrack.SetNClusters(nHits);
863 mergedTrack.SetFirstClusterRef(nOutTrackClusters);
864 mergedTrack.SetInnerParam(startPoint);
865 mergedTrack.SetInnerAlpha(startAlpha);
866 mergedTrack.SetOuterParam(endPoint);
867 mergedTrack.SetOuterAlpha(endAlpha);
869 for( Int_t i = 0; i<nHits; i++ ){
870 AliHLTTPCCAClusterInfo &clu = fClusterInfos[hits[firstHit+i]];
871 outClusterIDsrc[nOutTrackClusters+i] =
872 AliHLTTPCCADataCompressor::ISliceIRowIClu2IDsrc(clu.ISlice(), clu.IRow(), clu.IClu());
873 outClusterPackedAmp[nOutTrackClusters+i]=clu.PackedAmp();
877 nOutTrackClusters+= nHits;
881 fOutput->SetNTracks( nOutTracks );
882 fOutput->SetNTrackClusters( nOutTrackClusters );
883 fOutput->SetPointers();
885 for( Int_t itr=0; itr<nOutTracks; itr++ ) fOutput->SetTrack( itr, outTracks[itr] );
887 for( Int_t ic=0; ic<nOutTrackClusters; ic++ ){
888 fOutput->SetClusterIDsrc( ic, outClusterIDsrc[ic] );
889 fOutput->SetClusterPackedAmp( ic, outClusterPackedAmp[ic] );
893 delete[] outClusterIDsrc;
894 delete[] outClusterPackedAmp;