1 /**************************************************************************
2 * Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved. *
4 * Author: The ALICE Off-line Project. *
5 * Contributors are mentioned in the code where appropriate. *
7 * Permission to use, copy, modify and distribute this software and its *
8 * documentation strictly for non-commercial purposes is hereby granted *
9 * without fee, provided that the above copyright notice appears in all *
10 * copies and that both the copyright notice and this permission notice *
11 * appear in the supporting documentation. The authors make no claims *
12 * about the suitability of this software for any purpose. It is *
13 * provided "as is" without express or implied warranty. *
14 **************************************************************************/
18 //-------------------------------------------------------------------------
19 // Implementation of the AliTracker class
20 // that is the base for AliTPCtracker, AliITStrackerV2 and AliTRDtracker
21 // Origin: Iouri Belikov, CERN, Jouri.Belikov@cern.ch
22 //-------------------------------------------------------------------------
26 #include "AliTracker.h"
27 #include "AliCluster.h"
30 const AliMagF *AliTracker::fgkFieldMap=0;
34 AliTracker::AliTracker():
42 //--------------------------------------------------------------------
43 // The default constructor.
44 //--------------------------------------------------------------------
45 if (!fgkFieldMap) AliWarning("Field map is not set. Call AliTracker::SetFieldMap before creating a tracker!");
48 //__________________________________________________________________________
49 void AliTracker::CookLabel(AliKalmanTrack *t, Float_t wrong) const {
50 //--------------------------------------------------------------------
51 //This function "cooks" a track label. If label<0, this track is fake.
52 //--------------------------------------------------------------------
53 Int_t noc=t->GetNumberOfClusters();
54 Int_t *lb=new Int_t[noc];
55 Int_t *mx=new Int_t[noc];
56 AliCluster **clusters=new AliCluster*[noc];
59 for (i=0; i<noc; i++) {
61 Int_t index=t->GetClusterIndex(i);
62 clusters[i]=GetCluster(index);
66 for (i=0; i<noc; i++) {
67 AliCluster *c=clusters[i];
68 lab=TMath::Abs(c->GetLabel(0));
70 for (j=0; j<noc; j++) if (lb[j]==lab || mx[j]==0) break;
76 for (i=0; i<noc; i++) if (mx[i]>max) {max=mx[i]; lab=lb[i];}
78 for (i=0; i<noc; i++) {
79 AliCluster *c=clusters[i];
80 //if (TMath::Abs(c->GetLabel(1)) == lab ||
81 // TMath::Abs(c->GetLabel(2)) == lab ) max++;
82 if (TMath::Abs(c->GetLabel(0)!=lab))
83 if (TMath::Abs(c->GetLabel(1)) == lab ||
84 TMath::Abs(c->GetLabel(2)) == lab ) max++;
87 if ((1.- Float_t(max)/noc) > wrong) lab=-lab;
88 t->SetFakeRatio((1.- Float_t(max)/noc));
96 //____________________________________________________________________________
97 void AliTracker::UseClusters(const AliKalmanTrack *t, Int_t from) const {
98 //------------------------------------------------------------------
99 //This function marks clusters associated with the track.
100 //------------------------------------------------------------------
101 Int_t noc=t->GetNumberOfClusters();
102 for (Int_t i=from; i<noc; i++) {
103 Int_t index=t->GetClusterIndex(i);
104 AliCluster *c=GetCluster(index);