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"
36 extern AliRun* gAlice;
40 //__________________________________________________________________________
41 void AliTracker::CookLabel(AliKalmanTrack *t, Float_t wrong) const {
42 //--------------------------------------------------------------------
43 //This function "cooks" a track label. If label<0, this track is fake.
44 //--------------------------------------------------------------------
45 Int_t noc=t->GetNumberOfClusters();
46 Int_t *lb=new Int_t[noc];
47 Int_t *mx=new Int_t[noc];
48 AliCluster **clusters=new AliCluster*[noc];
51 for (i=0; i<noc; i++) {
53 Int_t index=t->GetClusterIndex(i);
54 clusters[i]=GetCluster(index);
58 for (i=0; i<noc; i++) {
59 AliCluster *c=clusters[i];
60 lab=TMath::Abs(c->GetLabel(0));
62 for (j=0; j<noc; j++) if (lb[j]==lab || mx[j]==0) break;
68 for (i=0; i<noc; i++) if (mx[i]>max) {max=mx[i]; lab=lb[i];}
71 for (i=0; i<noc; i++) {
72 AliCluster *c=clusters[i];
73 if (TMath::Abs(c->GetLabel(0)) == lab ||
74 TMath::Abs(c->GetLabel(1)) == lab ||
75 TMath::Abs(c->GetLabel(2)) == lab ) max++;
78 if ((1.- Float_t(max)/noc) > wrong) lab=-lab;
86 //____________________________________________________________________________
87 void AliTracker::UseClusters(const AliKalmanTrack *t, Int_t from) const {
88 //------------------------------------------------------------------
89 //This function marks clusters associated with the track.
90 //------------------------------------------------------------------
91 Int_t noc=t->GetNumberOfClusters();
92 for (Int_t i=from; i<noc; i++) {
93 Int_t index=t->GetClusterIndex(i);
94 AliCluster *c=GetCluster(index);
99 ////////////////////////////////////////////////////////////////////////
100 Int_t AliTracker::SetFieldFactor() {
102 // Utility class to set the value of the magnetic field in the barrel
103 // It supposes that the correct object gAlice is in the memory
106 SetConvConst(1000/0.299792458/gAlice->Field()->SolenoidField());
107 Double_t field=gAlice->Field()->SolenoidField();
108 ::Info("SetFieldFactor","Magnetic field in kGauss: %f\n",field);
111 ////////////////////////////////////////////////////////////////////////
112 Int_t AliTracker::SetFieldFactor(TFile *file, Bool_t deletegAlice) {
114 // Utility class to set the value of the magnetic field in the barrel
115 // gAlice object is read from the file, and optionally deleted
117 if (!(gAlice=(AliRun*)file->Get("gAlice"))) {
119 ("SetFieldFactor","gAlice has not been found in file %s\n",file->GetName());
122 Int_t rc = SetFieldFactor();
129 ////////////////////////////////////////////////////////////////////////
130 Int_t AliTracker::SetFieldFactor(const char* fileName, Bool_t closeFile) {
132 // Utility class to set the value of the magnetic field in the barrel
133 // gAlice object is read from the file, the file is optionally closed
135 TFile *file=TFile::Open(fileName);
136 if (!file->IsOpen()) {
137 ::Warning("AliTracker::SetFieldFactor","Cannnot open %s !\n",fileName);
140 Int_t rc = SetFieldFactor(file, closeFile) ;
141 if (closeFile) file->Close();
144 ////////////////////////////////////////////////////////////////////////