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 "AliHLTTPCCATrackParam.h"
25 #include "AliHLTTPCCAMerger.h"
27 #include "AliHLTTPCCAMath.h"
28 #include "TStopwatch.h"
30 #include "AliHLTTPCCATrackParam.h"
31 #include "AliHLTTPCCASliceTrack.h"
32 #include "AliHLTTPCCASliceOutput.h"
33 #include "AliHLTTPCCAMergedTrack.h"
34 #include "AliHLTTPCCAMergerOutput.h"
35 #include "AliHLTTPCCADataCompressor.h"
36 #include "AliHLTTPCCAParam.h"
37 #include "AliHLTTPCCATrackLinearisation.h"
40 class AliHLTTPCCAMerger::AliHLTTPCCASliceTrackInfo
45 const AliHLTTPCCATrackParam &InnerParam() const { return fInnerParam; }
46 const AliHLTTPCCATrackParam &OuterParam() const { return fOuterParam; }
47 float InnerAlpha() const { return fInnerAlpha; }
48 float OuterAlpha() const { return fOuterAlpha; }
49 int NClusters() const { return fNClusters; }
50 int FirstClusterRef() const { return fFirstClusterRef; }
51 int PrevNeighbour() const { return fPrevNeighbour; }
52 int NextNeighbour() const { return fNextNeighbour; }
53 bool Used() const { return fUsed; }
55 void SetInnerParam( const AliHLTTPCCATrackParam &v ) { fInnerParam = v; }
56 void SetOuterParam( const AliHLTTPCCATrackParam &v ) { fOuterParam = v; }
57 void SetInnerAlpha( float v ) { fInnerAlpha = v; }
58 void SetOuterAlpha( float v ) { fOuterAlpha = v; }
59 void SetNClusters ( int v ) { fNClusters = v; }
60 void SetFirstClusterRef( int v ) { fFirstClusterRef = v; }
61 void SetPrevNeighbour( int v ) { fPrevNeighbour = v; }
62 void SetNextNeighbour( int v ) { fNextNeighbour = v; }
63 void SetUsed( bool v ) { fUsed = v; }
67 AliHLTTPCCATrackParam fInnerParam; // inner parameters
68 AliHLTTPCCATrackParam fOuterParam; // outer parameters
69 float fInnerAlpha; // alpha angle for inner parameters
70 float fOuterAlpha; // alpha angle for outer parameters
71 int fNClusters; // N clusters
72 int fFirstClusterRef; // index of the first track cluster in the global cluster array
73 int fPrevNeighbour; // neighbour in the previous slise
74 int fNextNeighbour; // neighbour in the next slise
75 bool fUsed; // is the slice track already merged
80 class AliHLTTPCCAMerger::AliHLTTPCCABorderTrack
85 const AliHLTTPCCATrackParam &Param() const { return fParam; }
86 int TrackID() const { return fTrackID; }
87 int NClusters() const { return fNClusters; }
88 int IRow() const { return fIRow; }
89 float X() const { return fX; }
90 bool OK() const { return fOK; }
92 void SetParam ( const AliHLTTPCCATrackParam &v ) { fParam = v; }
93 void SetTrackID ( int v ) { fTrackID = v; }
94 void SetNClusters ( int v ) { fNClusters = v; }
95 void SetIRow ( int v ) { fIRow = v; }
96 void SetX ( float v ) { fX = v; }
97 void SetOK ( bool v ) { fOK = v; }
101 AliHLTTPCCATrackParam fParam; // track parameters at the border
102 int fTrackID; // track index
103 int fNClusters; // n clusters
104 int fIRow; // row number of the closest cluster
105 float fX; // X coordinate of the closest cluster
106 bool fOK; // is the track rotated and extrapolated correctly
112 AliHLTTPCCAMerger::AliHLTTPCCAMerger()
119 fMaxClusterInfos( 0 )
126 AliHLTTPCCAMerger::AliHLTTPCCAMerger(const AliHLTTPCCAMerger&)
138 const AliHLTTPCCAMerger &AliHLTTPCCAMerger::operator=(const AliHLTTPCCAMerger&) const
144 AliHLTTPCCAMerger::~AliHLTTPCCAMerger()
147 if ( fTrackInfos ) delete[] fTrackInfos;
148 if ( fClusterInfos ) delete[] fClusterInfos;
149 if ( fOutput ) delete[] ( ( char* )( fOutput ) );
152 void AliHLTTPCCAMerger::Clear()
154 for ( int i = 0; i < fgkNSlices; ++i ) {
160 void AliHLTTPCCAMerger::SetSliceData( int index, const AliHLTTPCCASliceOutput *SliceData )
162 fkSlices[index] = SliceData;
165 void AliHLTTPCCAMerger::Reconstruct()
167 //* main merging routine
173 void AliHLTTPCCAMerger::UnpackSlices()
175 //* unpack the cluster information from the slice tracks and initialize track info array
177 // get N tracks and N clusters in event
179 int nTracksTotal = 0;
180 int nTrackClustersTotal = 0;
181 for ( int iSlice = 0; iSlice < fgkNSlices; iSlice++ ) {
182 if ( !fkSlices[iSlice] ) continue;
183 nTracksTotal += fkSlices[iSlice]->NTracks();
184 nTrackClustersTotal += fkSlices[iSlice]->NTrackClusters();
187 // book/clean memory if necessary
189 if ( nTracksTotal > fMaxTrackInfos || ( fMaxTrackInfos > 100 && nTracksTotal < 0.5*fMaxTrackInfos ) ) {
190 if ( fTrackInfos ) delete[] fTrackInfos;
191 fMaxTrackInfos = ( int ) ( nTracksTotal * 1.2 );
192 fTrackInfos = new AliHLTTPCCASliceTrackInfo[fMaxTrackInfos];
195 if ( nTrackClustersTotal > fMaxClusterInfos || ( fMaxClusterInfos > 1000 && nTrackClustersTotal < 0.5*fMaxClusterInfos ) ) {
196 if ( fClusterInfos ) delete[] fClusterInfos;
197 fMaxClusterInfos = ( int ) ( nTrackClustersTotal * 1.2 );
198 fClusterInfos = new AliHLTTPCCAClusterInfo [fMaxClusterInfos];
201 if ( fOutput ) delete[] ( ( char* )( fOutput ) );
202 int size = fOutput->EstimateSize( nTracksTotal, nTrackClustersTotal );
203 fOutput = ( AliHLTTPCCAMergerOutput* )( new float2[size/sizeof( float2 )+1] );
206 // unpack track and cluster information
208 int nTracksCurrent = 0;
209 int nClustersCurrent = 0;
211 for ( int iSlice = 0; iSlice < fgkNSlices; iSlice++ ) {
213 fSliceTrackInfoStart[ iSlice ] = nTracksCurrent;
214 fSliceNTrackInfos[ iSlice ] = 0;
216 if ( !fkSlices[iSlice] ) continue;
218 const AliHLTTPCCASliceOutput &slice = *( fkSlices[iSlice] );
220 for ( int itr = 0; itr < slice.NTracks(); itr++ ) {
222 const AliHLTTPCCASliceTrack &sTrack = slice.Track( itr );
223 AliHLTTPCCATrackParam t0 = sTrack.Param();
226 for ( int iTrClu = 0; iTrClu < sTrack.NClusters(); iTrClu++ ) {
228 // unpack cluster information
230 AliHLTTPCCAClusterInfo &clu = fClusterInfos[nClustersCurrent + nCluNew];
231 int ic = sTrack.FirstClusterRef() + iTrClu;
233 clu.SetISlice( iSlice );
234 clu.SetIRow( slice.ClusterRow( ic ) );
235 clu.SetId( slice.ClusterId( ic ) );
236 clu.SetPackedAmp( slice.ClusterPackedAmp( ic ) );
237 float2 yz = slice.ClusterUnpackedYZ( ic );
238 clu.SetX( slice.ClusterUnpackedX( ic ) );
242 if ( !t0.TransportToX( clu.X(), fSliceParam.GetBz( t0 ), .999 ) ) continue;
245 fSliceParam.GetClusterErrors2( clu.IRow(), clu.Z(), t0.SinPhi(), t0.GetCosPhi(), t0.DzDs(), err2Y, err2Z );
247 clu.SetErr2Y( err2Y );
248 clu.SetErr2Z( err2Z );
252 if ( nCluNew < .8*sTrack.NClusters() ) continue;
258 for ( int i = 0; i < nHits; i++ ) hits[i] = nClustersCurrent + i;
260 AliHLTTPCCATrackParam startPoint = sTrack.Param();
261 AliHLTTPCCATrackParam endPoint = startPoint;
262 float startAlpha = fSliceParam.Alpha( iSlice );
263 float endAlpha = startAlpha;
265 if ( !FitTrack( endPoint, endAlpha, startPoint, startAlpha, hits, nHits, 0 ) ) continue;
267 startPoint = endPoint;
268 startAlpha = endAlpha;
269 if ( !FitTrack( startPoint, startAlpha, endPoint, endAlpha, hits, nHits, 1 ) ) continue;
271 if ( nHits < .8*sTrack.NClusters() ) continue;
275 AliHLTTPCCASliceTrackInfo &track = fTrackInfos[nTracksCurrent];
277 track.SetInnerParam( startPoint );
278 track.SetInnerAlpha( startAlpha );
279 track.SetOuterParam( endPoint );
280 track.SetOuterAlpha( endAlpha );
281 track.SetFirstClusterRef( nClustersCurrent );
282 track.SetNClusters( nHits );
283 track.SetPrevNeighbour( -1 );
284 track.SetNextNeighbour( -1 );
287 for ( int i = 0; i < nHits; i++ )
288 fClusterInfos[nClustersCurrent + i] = fClusterInfos[hits[i]];
290 fSliceNTrackInfos[ iSlice ]++;
291 nClustersCurrent += nHits;
293 //std::cout<<"Unpack slice "<<iSlice<<": ntracks "<<slice.NTracks()<<"/"<<fSliceNTrackInfos[iSlice]<<std::endl;
299 bool AliHLTTPCCAMerger::FitTrack( AliHLTTPCCATrackParam &T, float &Alpha,
300 AliHLTTPCCATrackParam t0, float Alpha0,
301 int hits[], int &NTrackHits, bool dir,
302 AliHLTTPCCAClusterInfo *infoArray )
306 AliHLTTPCCATrackParam::AliHLTTPCCATrackFitParam fitPar;
307 AliHLTTPCCATrackParam t = t0;
308 AliHLTTPCCATrackLinearisation l( t0 );
313 infoArray = fClusterInfos;
317 t.CalculateFitParameters( fitPar );
322 for ( int ihit = 0; ihit < NTrackHits; ihit++ ) {
324 int jhit = dir ? ( NTrackHits - 1 - ihit ) : ihit;
325 AliHLTTPCCAClusterInfo &h = infoArray[hits[jhit]];
327 int iSlice = h.ISlice();
329 float sliceAlpha = fSliceParam.Alpha( iSlice );
331 if ( CAMath::Abs( sliceAlpha - Alpha0 ) > 1.e-4 ) {
332 if ( ! t.Rotate( sliceAlpha - Alpha0, l, .999 ) ) continue;
336 //float x = fSliceParam.RowX( h.IRow() );
339 if ( !t.TransportToXWithMaterial( x, l, fitPar, fSliceParam.GetBz( t ) ) ) continue;
359 t.CalculateFitParameters( fitPar );
362 float err2Y = h.Err2Y();
363 float err2Z = h.Err2Z();
364 if ( doErrors ) fSliceParam.GetClusterErrors2( h.IRow(), h.Z(), l.SinPhi(), l.CosPhi(), l.DzDs(), err2Y, err2Z );
365 if ( !t.Filter( h.Y(), h.Z(), err2Y, err2Z ) ) continue;
369 hitsNew[nHitsNew++] = hits[jhit];
372 if ( CAMath::Abs( t.QPt() ) < 1.e-8 ) t.SetQPt( 1.e-8 );
376 const float *c = t.Cov();
377 for ( int i = 0; i < 15; i++ ) ok = ok && finite( c[i] );
378 for ( int i = 0; i < 5; i++ ) ok = ok && finite( t.Par()[i] );
379 ok = ok && ( t.GetX() > 50 );
381 if ( c[0] <= 0 || c[2] <= 0 || c[5] <= 0 || c[9] <= 0 || c[14] <= 0 ) ok = 0;
382 if ( c[0] > 5. || c[2] > 5. || c[5] > 2. || c[9] > 2 || c[14] > 2. ) ok = 0;
384 if ( CAMath::Abs( t.SinPhi() ) > .99 ) ok = 0;
385 else if ( l.CosPhi() >= 0 ) t.SetSignCosPhi( 1 );
386 else t.SetSignCosPhi( -1 );
391 NTrackHits = nHitsNew;
392 for ( int i = 0; i < NTrackHits; i++ ) {
393 hits[dir ?( NTrackHits-1-i ) :i] = hitsNew[i];
400 float AliHLTTPCCAMerger::GetChi2( float x1, float y1, float a00, float a10, float a11,
401 float x2, float y2, float b00, float b10, float b11 )
403 //* Calculate Chi2/ndf deviation
405 float d[2] = { x1 - x2, y1 - y2 };
407 float mSi[3] = { a00 + b00, a10 + b10, a11 + b11 };
409 float s = ( mSi[0] * mSi[2] - mSi[1] * mSi[1] );
411 if ( s < 1.E-10 ) return 10000.;
413 float mS[3] = { mSi[2], -mSi[1], mSi[0] };
415 return TMath::Abs( ( ( mS[0]*d[0] + mS[1]*d[1] )*d[0]
416 + ( mS[1]*d[0] + mS[2]*d[1] )*d[1] ) / s / 2 );
422 void AliHLTTPCCAMerger::MakeBorderTracks( int iSlice, int iBorder, AliHLTTPCCABorderTrack B[], int &nB )
424 //* prepare slice tracks for merging with next/previous/same sector
425 //* each track transported to the border line,
426 //* in some cases both inner and outer parameters of the track are transported
428 static int statAll = 0, statOK = 0;
430 float dAlpha = fSliceParam.DAlpha() / 2;
433 if ( iBorder == 0 ) { // transport to the left age of the sector and rotate horisontally
434 dAlpha = dAlpha - CAMath::Pi() / 2 ;
435 } else if ( iBorder == 1 ) { // transport to the right age of the sector and rotate horisontally
436 dAlpha = -dAlpha - CAMath::Pi() / 2 ;
437 } else if ( iBorder == 2 ) { // transport to the left age of the sector and rotate vertically
439 x0 = fSliceParam.RowX( 63 );
440 } else if ( iBorder == 3 ) { // transport to the right age of the sector and rotate vertically
442 x0 = fSliceParam.RowX( 63 );
443 } else if ( iBorder == 4 ) { // transport to the middle of the sector, w/o rotation
445 x0 = fSliceParam.RowX( 63 );
448 for ( int itr = 0; itr < fSliceNTrackInfos[iSlice]; itr++ ) {
450 const AliHLTTPCCASliceTrackInfo &track = fTrackInfos[ fSliceTrackInfoStart[iSlice] + itr ];
452 AliHLTTPCCATrackParam t0 = track.InnerParam();
453 AliHLTTPCCATrackParam t1 = track.OuterParam();
455 const float maxSin = CAMath::Sin( 60. / 180.*CAMath::Pi() );
457 bool ok0 = t0.Rotate( dAlpha, maxSin );
458 bool ok1 = t1.Rotate( dAlpha, maxSin );
461 bool do1 = ok1 && ( !ok0 || t1.SignCosPhi() * t0.SignCosPhi() < 0 );
463 if ( ok0 && !do1 && ok1 && ( t1.X() < t0.X() ) ) {
469 AliHLTTPCCABorderTrack &b = B[nB];
471 if ( t0.TransportToX( x0, fSliceParam.GetBz( t0 ), maxSin ) ) {
474 b.SetNClusters( track.NClusters() );
475 b.SetIRow( fClusterInfos[ track.FirstClusterRef() + 0 ].IRow() );
481 AliHLTTPCCABorderTrack &b = B[nB];
483 if ( t1.TransportToX( x0, fSliceParam.GetBz( t1 ), maxSin ) ) {
486 b.SetNClusters( track.NClusters() );
487 b.SetIRow( fClusterInfos[ track.FirstClusterRef() + track.NClusters()-1 ].IRow() );
492 if ( do0 || do1 ) statOK++;
499 void AliHLTTPCCAMerger::SplitBorderTracks( int iSlice1, AliHLTTPCCABorderTrack B1[], int N1,
500 int iSlice2, AliHLTTPCCABorderTrack B2[], int N2
503 //* split two sets of tracks
505 float factor2ys = 1.;//1.5;//SG!!!
506 float factor2zt = 1.;//1.5;//SG!!!
507 float factor2k = 2.0;//2.2;
509 factor2k = 3.5 * 3.5 * factor2k * factor2k;
510 factor2ys = 3.5 * 3.5 * factor2ys * factor2ys;
511 factor2zt = 3.5 * 3.5 * factor2zt * factor2zt;
513 int minNPartHits = 10;//SG!!!
514 int minNTotalHits = 20;
516 //float maxDX = fSliceParam.RowX(40) - fSliceParam.RowX(0);
518 for ( int i1 = 0; i1 < N1; i1++ ) {
519 AliHLTTPCCABorderTrack &b1 = B1[i1];
520 if ( !b1.OK() ) continue;
521 if ( b1.NClusters() < minNPartHits ) continue;
522 const AliHLTTPCCATrackParam &t1 = b1.Param();
525 int start2 = ( iSlice1 != iSlice2 ) ? 0 : i1 + 1;
526 for ( int i2 = start2; i2 < N2; i2++ ) {
527 AliHLTTPCCABorderTrack &b2 = B2[i2];
528 if ( !b2.OK() ) continue;
529 if ( b2.NClusters() < minNPartHits ) continue;
530 if ( b2.NClusters() < lBest2 ) continue;
531 if ( b1.NClusters() + b2.NClusters() < minNTotalHits ) continue;
533 //if( TMath::Abs(b1.fX - b2.fX)>maxDX ) continue;
535 const AliHLTTPCCATrackParam &t2 = b2.Param();
537 float c = t2.SignCosPhi() * t1.SignCosPhi() >= 0 ? 1 : -1;
538 float dk = t2.QPt() - c * t1.QPt();
539 float s2k = t2.Err2QPt() + t1.Err2QPt();
541 if ( dk*dk > factor2k*s2k ) continue;
544 float chi2ys = GetChi2( t1.Y(), c * t1.SinPhi(), t1.Cov()[0], c * t1.Cov()[3], t1.Cov()[5],
545 t2.Y(), t2.SinPhi(), t2.Cov()[0], t2.Cov()[3], t2.Cov()[5] );
547 if ( chi2ys > factor2ys ) continue;
549 float chi2zt = GetChi2( t1.Z(), c * t1.DzDs(), t1.Cov()[2], c * t1.Cov()[7], t1.Cov()[9],
550 t2.Z(), t2.DzDs(), t2.Cov()[2], t2.Cov()[7], t2.Cov()[9] );
552 if ( chi2zt > factor2zt ) continue;
554 lBest2 = b2.NClusters();
555 iBest2 = b2.TrackID();
558 if ( iBest2 < 0 ) continue;
560 AliHLTTPCCASliceTrackInfo &newTrack1 = fTrackInfos[fSliceTrackInfoStart[iSlice1] + b1.TrackID() ];
561 AliHLTTPCCASliceTrackInfo &newTrack2 = fTrackInfos[fSliceTrackInfoStart[iSlice2] + iBest2 ];
563 int old1 = newTrack2.PrevNeighbour();
566 AliHLTTPCCASliceTrackInfo &oldTrack1 = fTrackInfos[fSliceTrackInfoStart[iSlice1] + old1];
567 if ( oldTrack1.NClusters() < newTrack1.NClusters() ) {
568 newTrack2.SetPrevNeighbour( -1 );
569 oldTrack1.SetNextNeighbour( -1 );
572 int old2 = newTrack1.NextNeighbour();
574 AliHLTTPCCASliceTrackInfo &oldTrack2 = fTrackInfos[fSliceTrackInfoStart[iSlice2] + old2];
575 if ( oldTrack2.NClusters() < newTrack2.NClusters() ) {
576 oldTrack2.SetPrevNeighbour( -1 );
579 newTrack1.SetNextNeighbour( iBest2 );
580 newTrack2.SetPrevNeighbour( b1.TrackID() );
586 void AliHLTTPCCAMerger::Merging()
588 //* track merging between slices
590 fOutput->SetNTracks( 0 );
591 fOutput->SetNTrackClusters( 0 );
592 fOutput->SetPointers();
595 // for each slice set number of the next neighbouring slice
597 int nextSlice[100], prevSlice[100];
599 for ( int iSlice = 0; iSlice < fgkNSlices; iSlice++ ) {
600 nextSlice[iSlice] = iSlice + 1;
601 prevSlice[iSlice] = iSlice - 1;
603 int mid = fgkNSlices / 2 - 1 ;
604 int last = fgkNSlices - 1 ;
605 if ( mid < 0 ) mid = 0; // to avoid compiler warning
606 if ( last < 0 ) last = 0; //
607 nextSlice[ mid ] = 0;
608 prevSlice[ 0 ] = mid;
609 nextSlice[ last ] = fgkNSlices / 2;
610 prevSlice[ fgkNSlices/2 ] = last;
612 int maxNSliceTracks = 0;
613 for ( int iSlice = 0; iSlice < fgkNSlices; iSlice++ ) {
614 if ( maxNSliceTracks < fSliceNTrackInfos[iSlice] ) maxNSliceTracks = fSliceNTrackInfos[iSlice];
617 if ( 1 ) {// merging track segments withing one slice
619 AliHLTResizableArray<AliHLTTPCCABorderTrack> bord( maxNSliceTracks*10 );
621 AliHLTTPCCASliceTrackInfo *tmpT = new AliHLTTPCCASliceTrackInfo[maxNSliceTracks];
622 AliHLTTPCCAClusterInfo *tmpH = new AliHLTTPCCAClusterInfo[fMaxClusterInfos];
624 for ( int iSlice = 0; iSlice < fgkNSlices; iSlice++ ) {
627 MakeBorderTracks( iSlice, 4, bord.Data(), nBord );
628 SplitBorderTracks( iSlice, bord.Data(), nBord, iSlice, bord.Data(), nBord );
631 int sliceFirstClusterRef = 0;
632 for ( int itr = 0; itr < fSliceNTrackInfos[iSlice]; itr++ ) {
633 AliHLTTPCCASliceTrackInfo &track = fTrackInfos[ fSliceTrackInfoStart[iSlice] + itr];
634 if ( itr == 0 ) sliceFirstClusterRef = track.FirstClusterRef();
635 track.SetPrevNeighbour( -1 );
636 if ( track.NextNeighbour() == -2 ) {
637 track.SetNextNeighbour( -1 );
640 AliHLTTPCCASliceTrackInfo &trackNew = tmpT[nTr];
642 trackNew.SetFirstClusterRef( sliceFirstClusterRef + nH );
644 for ( int ih = 0; ih < track.NClusters(); ih++ ) tmpH[nH+ih] = fClusterInfos[track.FirstClusterRef()+ih];
646 nH += track.NClusters();
648 int jtr = track.NextNeighbour();
650 if ( jtr < 0 ) continue;
651 AliHLTTPCCASliceTrackInfo &neighTrack = fTrackInfos[ fSliceTrackInfoStart[iSlice] + jtr];
653 track.SetNextNeighbour( -1 );
654 neighTrack.SetNextNeighbour( -2 );
656 for ( int ih = 0; ih < neighTrack.NClusters(); ih++ )
657 tmpH[nH+ih] = fClusterInfos[neighTrack.FirstClusterRef()+ih];
659 trackNew.SetNClusters( trackNew.NClusters() + neighTrack.NClusters() );
660 trackNew.SetNextNeighbour( -1 );
661 nH += neighTrack.NClusters();
662 if ( neighTrack.InnerParam().X() < track.InnerParam().X() ) trackNew.SetInnerParam( neighTrack.InnerParam() );
663 if ( neighTrack.OuterParam().X() > track.OuterParam().X() ) trackNew.SetOuterParam( neighTrack.OuterParam() );
666 fSliceNTrackInfos[iSlice] = nTr;
667 for ( int itr = 0; itr < nTr; itr++ ) fTrackInfos[ fSliceTrackInfoStart[iSlice] + itr] = tmpT[itr];
668 for ( int ih = 0; ih < nH; ih++ ) fClusterInfos[sliceFirstClusterRef + ih] = tmpH[ih];
676 //* merging tracks between slices
679 // arrays for the rotated track parameters
681 AliHLTTPCCABorderTrack
682 *bCurr0 = new AliHLTTPCCABorderTrack[maxNSliceTracks*10],
683 *bNext0 = new AliHLTTPCCABorderTrack[maxNSliceTracks*10],
684 *bCurr = new AliHLTTPCCABorderTrack[maxNSliceTracks*10],
685 *bNext = new AliHLTTPCCABorderTrack[maxNSliceTracks*10];
687 for ( int iSlice = 0; iSlice < fgkNSlices; iSlice++ ) {
689 int jSlice = nextSlice[iSlice];
691 int nCurr0 = 0, nNext0 = 0;
692 int nCurr = 0, nNext = 0;
694 MakeBorderTracks( iSlice, 0, bCurr, nCurr );
695 MakeBorderTracks( jSlice, 1, bNext, nNext );
696 MakeBorderTracks( iSlice, 2, bCurr0, nCurr0 );
697 MakeBorderTracks( jSlice, 3, bNext0, nNext0 );
699 SplitBorderTracks( iSlice, bCurr0, nCurr0, jSlice, bNext0, nNext0 );
700 SplitBorderTracks( iSlice, bCurr, nCurr, jSlice, bNext, nNext );
703 if ( bCurr0 ) delete[] bCurr0;
704 if ( bNext0 ) delete[] bNext0;
705 if ( bCurr ) delete[] bCurr;
706 if ( bNext ) delete[] bNext;
709 //static int nRejected = 0;
712 int nOutTrackClusters = 0;
714 AliHLTTPCCAMergedTrack *outTracks = new AliHLTTPCCAMergedTrack[fMaxTrackInfos];
715 unsigned int *outClusterId = new unsigned int [fMaxClusterInfos];
716 UChar_t *outClusterPackedAmp = new UChar_t [fMaxClusterInfos];
718 for ( int iSlice = 0; iSlice < fgkNSlices; iSlice++ ) {
720 for ( int itr = 0; itr < fSliceNTrackInfos[iSlice]; itr++ ) {
722 AliHLTTPCCASliceTrackInfo &track = fTrackInfos[fSliceTrackInfoStart[iSlice] + itr];
724 if ( track.Used() ) continue;
725 if ( track.PrevNeighbour() >= 0 ) continue;
727 AliHLTTPCCATrackParam startPoint = track.InnerParam(), endPoint = track.OuterParam();
728 float startAlpha = track.InnerAlpha(), endAlpha = track.OuterAlpha();
738 for ( int jhit = 0; jhit < track.NClusters(); jhit++ ) {
739 int id = track.FirstClusterRef() + jhit;
740 hits[firstHit+jhit] = id;
742 nHits = track.NClusters();
743 jtr = track.NextNeighbour();
744 jSlice = nextSlice[iSlice];
748 AliHLTTPCCASliceTrackInfo &segment = fTrackInfos[fSliceTrackInfoStart[jSlice] + jtr];
749 if ( segment.Used() ) break;
750 segment.SetUsed( 1 );
752 int startHit = firstHit + nHits;
753 float d00 = startPoint.GetDistXZ2( segment.InnerParam() );
754 float d01 = startPoint.GetDistXZ2( segment.OuterParam() );
755 float d10 = endPoint.GetDistXZ2( segment.InnerParam() );
756 float d11 = endPoint.GetDistXZ2( segment.OuterParam() );
757 if ( d00 <= d01 && d00 <= d10 && d00 <= d11 ) {
758 startPoint = segment.OuterParam();
759 startAlpha = segment.OuterAlpha();
761 firstHit -= segment.NClusters();
763 } else if ( d01 <= d10 && d01 <= d11 ) {
764 startPoint = segment.InnerParam();
765 startAlpha = segment.InnerAlpha();
767 firstHit -= segment.NClusters();
769 } else if ( d10 <= d11 ) {
770 endPoint = segment.OuterParam();
771 endAlpha = segment.OuterAlpha();
774 endPoint = segment.InnerParam();
775 endAlpha = segment.InnerAlpha();
779 for ( int jhit = 0; jhit < segment.NClusters(); jhit++ ) {
780 int id = segment.FirstClusterRef() + jhit;
781 hits[startHit+( dir ?( segment.NClusters()-1-jhit ) :jhit )] = id;
783 nHits += segment.NClusters();
784 jtr = segment.NextNeighbour();
785 jSlice = nextSlice[jSlice];
788 if ( endPoint.X() < startPoint.X() ) { // swap
789 for ( int i = 0; i < nHits; i++ ) hits[i] = hits[firstHit+nHits-1-i];
793 if ( nHits < 30 ) continue; //SG!!!
799 endPoint = startPoint;
800 if ( !FitTrack( endPoint, endAlpha, startPoint, startAlpha, hits + firstHit, nHits, 0 ) ) continue;
801 if ( !FitTrack( startPoint, startAlpha, endPoint, endAlpha, hits + firstHit, nHits, 1 ) ) continue;
803 if ( nHits < 30 ) continue; //SG!!!
805 AliHLTTPCCATrackParam &p = startPoint;
808 double xTPC = 83.65; //SG!!!
809 double dAlpha = 0.00609235;
810 AliHLTTPCCATrackParam::AliHLTTPCCATrackFitParam fitPar;
811 p.CalculateFitParameters( fitPar );
813 if ( p.TransportToXWithMaterial( xTPC, fitPar, fSliceParam.GetBz( p ) ) ) {
815 double ymax = xTPC * CAMath::Tan( dAlpha / 2. );
817 if ( p.Rotate( dAlpha ) ) { startAlpha += dAlpha; p.TransportToXWithMaterial( xTPC, fitPar, fSliceParam.GetBz( p ) ); }
818 } else if ( y < -ymax ) {
819 if ( p.Rotate( -dAlpha ) ) { startAlpha -= dAlpha; p.TransportToXWithMaterial( xTPC, fitPar, fSliceParam.GetBz( p ) );}
827 const float *c = p.Cov();
828 for ( int i = 0; i < 15; i++ ) ok = ok && finite( c[i] );
829 for ( int i = 0; i < 5; i++ ) ok = ok && finite( p.Par()[i] );
830 ok = ok && ( p.GetX() > 50 );
832 if ( c[0] <= 0 || c[2] <= 0 || c[5] <= 0 || c[9] <= 0 || c[14] <= 0 ) ok = 0;
833 if ( c[0] > 5. || c[2] > 5. || c[5] > 2. || c[9] > 2 || c[14] > 2 ) ok = 0;
837 AliHLTTPCCAMergedTrack &mergedTrack = outTracks[nOutTracks];
838 mergedTrack.SetNClusters( nHits );
839 mergedTrack.SetFirstClusterRef( nOutTrackClusters );
840 mergedTrack.SetInnerParam( startPoint );
841 mergedTrack.SetInnerAlpha( startAlpha );
842 mergedTrack.SetOuterParam( endPoint );
843 mergedTrack.SetOuterAlpha( endAlpha );
845 for ( int i = 0; i < nHits; i++ ) {
846 AliHLTTPCCAClusterInfo &clu = fClusterInfos[hits[firstHit+i]];
847 outClusterId[nOutTrackClusters+i] = clu.Id();
848 outClusterPackedAmp[nOutTrackClusters+i] = clu.PackedAmp();
852 nOutTrackClusters += nHits;
856 fOutput->SetNTracks( nOutTracks );
857 fOutput->SetNTrackClusters( nOutTrackClusters );
858 fOutput->SetPointers();
860 for ( int itr = 0; itr < nOutTracks; itr++ ) fOutput->SetTrack( itr, outTracks[itr] );
862 for ( int ic = 0; ic < nOutTrackClusters; ic++ ) {
863 fOutput->SetClusterId( ic, outClusterId[ic] );
864 fOutput->SetClusterPackedAmp( ic, outClusterPackedAmp[ic] );
868 delete[] outClusterId;
869 delete[] outClusterPackedAmp;