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 "AliKalmanTrack.h"
28 #include "AliCluster.h"
33 const AliMagF *AliTracker::fgkFieldMap=0;
37 AliTracker::AliTracker():
45 //--------------------------------------------------------------------
46 // The default constructor.
47 //--------------------------------------------------------------------
48 if (!fgkFieldMap) AliWarning("Field map is not set. Call AliTracker::SetFieldMap before creating a tracker!");
51 void AliTracker::SetFieldMap(const AliMagF* map, Bool_t uni) {
52 //--------------------------------------------------------------------
53 //This passes the field map to the reconstruction.
54 //--------------------------------------------------------------------
55 if (map==0) AliFatalClass("Can't access the field map !");
56 AliKalmanTrack::SetFieldMap(map);
57 if (uni) AliKalmanTrack::SetUniformFieldTracking();
61 //__________________________________________________________________________
62 void AliTracker::CookLabel(AliKalmanTrack *t, Float_t wrong) const {
63 //--------------------------------------------------------------------
64 //This function "cooks" a track label. If label<0, this track is fake.
65 //--------------------------------------------------------------------
66 Int_t noc=t->GetNumberOfClusters();
67 Int_t *lb=new Int_t[noc];
68 Int_t *mx=new Int_t[noc];
69 AliCluster **clusters=new AliCluster*[noc];
72 for (i=0; i<noc; i++) {
74 Int_t index=t->GetClusterIndex(i);
75 clusters[i]=GetCluster(index);
79 for (i=0; i<noc; i++) {
80 AliCluster *c=clusters[i];
81 lab=TMath::Abs(c->GetLabel(0));
83 for (j=0; j<noc; j++) if (lb[j]==lab || mx[j]==0) break;
89 for (i=0; i<noc; i++) if (mx[i]>max) {max=mx[i]; lab=lb[i];}
91 for (i=0; i<noc; i++) {
92 AliCluster *c=clusters[i];
93 //if (TMath::Abs(c->GetLabel(1)) == lab ||
94 // TMath::Abs(c->GetLabel(2)) == lab ) max++;
95 if (TMath::Abs(c->GetLabel(0)!=lab))
96 if (TMath::Abs(c->GetLabel(1)) == lab ||
97 TMath::Abs(c->GetLabel(2)) == lab ) max++;
100 if ((1.- Float_t(max)/noc) > wrong) lab=-lab;
101 t->SetFakeRatio((1.- Float_t(max)/noc));
109 //____________________________________________________________________________
110 void AliTracker::UseClusters(const AliKalmanTrack *t, Int_t from) const {
111 //------------------------------------------------------------------
112 //This function marks clusters associated with the track.
113 //------------------------------------------------------------------
114 Int_t noc=t->GetNumberOfClusters();
115 for (Int_t i=from; i<noc; i++) {
116 Int_t index=t->GetClusterIndex(i);
117 AliCluster *c=GetCluster(index);