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"
28 #include "AliKalmanTrack.h"
32 extern AliRun* gAlice;
34 const AliMagF *AliTracker::fgkFieldMap=0;
38 AliTracker::AliTracker():
48 //--------------------------------------------------------------------
49 // The default constructor.
50 //--------------------------------------------------------------------
51 AliMagF *field=gAlice->Field();
52 if (field==0) Fatal("AliTracker()","Can't access the field map !");
56 void AliTracker::SetFieldMap(const AliMagF* map) {
57 //--------------------------------------------------------------------
58 //This passes the field map to the reconstruction.
59 //--------------------------------------------------------------------
60 if (map==0) ::Fatal("SetFieldMap","Can't access the field map !");
61 AliKalmanTrack::SetConvConst(1000/0.299792458/map->SolenoidField());
65 //__________________________________________________________________________
66 void AliTracker::CookLabel(AliKalmanTrack *t, Float_t wrong) const {
67 //--------------------------------------------------------------------
68 //This function "cooks" a track label. If label<0, this track is fake.
69 //--------------------------------------------------------------------
70 Int_t noc=t->GetNumberOfClusters();
71 Int_t *lb=new Int_t[noc];
72 Int_t *mx=new Int_t[noc];
73 AliCluster **clusters=new AliCluster*[noc];
76 for (i=0; i<noc; i++) {
78 Int_t index=t->GetClusterIndex(i);
79 clusters[i]=GetCluster(index);
83 for (i=0; i<noc; i++) {
84 AliCluster *c=clusters[i];
85 lab=TMath::Abs(c->GetLabel(0));
87 for (j=0; j<noc; j++) if (lb[j]==lab || mx[j]==0) break;
93 for (i=0; i<noc; i++) if (mx[i]>max) {max=mx[i]; lab=lb[i];}
95 for (i=0; i<noc; i++) {
96 AliCluster *c=clusters[i];
97 //if (TMath::Abs(c->GetLabel(1)) == lab ||
98 // TMath::Abs(c->GetLabel(2)) == lab ) max++;
99 if (TMath::Abs(c->GetLabel(0)!=lab))
100 if (TMath::Abs(c->GetLabel(1)) == lab ||
101 TMath::Abs(c->GetLabel(2)) == lab ) max++;
104 if ((1.- Float_t(max)/noc) > wrong) lab=-lab;
105 t->SetFakeRatio((1.- Float_t(max)/noc));
113 //____________________________________________________________________________
114 void AliTracker::UseClusters(const AliKalmanTrack *t, Int_t from) const {
115 //------------------------------------------------------------------
116 //This function marks clusters associated with the track.
117 //------------------------------------------------------------------
118 Int_t noc=t->GetNumberOfClusters();
119 for (Int_t i=from; i<noc; i++) {
120 Int_t index=t->GetClusterIndex(i);
121 AliCluster *c=GetCluster(index);