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be9c5115 | 1 | /************************************************************************** |
2 | * Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved. * | |
3 | * * | |
4 | * Author: The ALICE Off-line Project. * | |
5 | * Contributors are mentioned in the code where appropriate. * | |
6 | * * | |
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 | **************************************************************************/ | |
15 | ||
acd84897 | 16 | /* $Id$ */ |
fb17acd4 | 17 | |
be9c5115 | 18 | //------------------------------------------------------------------------- |
19 | // Implementation of the AliTracker class | |
9b83b8cc | 20 | // that is the base for AliTPCtracker, AliITStrackerV2 and AliTRDtracker |
21 | // Origin: Iouri Belikov, CERN, Jouri.Belikov@cern.ch | |
be9c5115 | 22 | //------------------------------------------------------------------------- |
116cbefd | 23 | |
be9c5115 | 24 | #include <TMath.h> |
25 | ||
26 | #include "AliTracker.h" | |
27 | #include "AliCluster.h" | |
28 | #include "AliKalmanTrack.h" | |
41377c29 | 29 | #include "AliRun.h" |
30 | #include "AliMagF.h" | |
31 | ||
32 | #include "TFile.h" | |
1d5fc4ea | 33 | #include "TError.h" |
41377c29 | 34 | |
35 | ||
36 | extern AliRun* gAlice; | |
be9c5115 | 37 | |
38 | ClassImp(AliTracker) | |
39 | ||
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]; | |
49 | ||
50 | Int_t i; | |
51 | for (i=0; i<noc; i++) { | |
52 | lb[i]=mx[i]=0; | |
53 | Int_t index=t->GetClusterIndex(i); | |
54 | clusters[i]=GetCluster(index); | |
55 | } | |
56 | ||
57 | Int_t lab=123456789; | |
58 | for (i=0; i<noc; i++) { | |
59 | AliCluster *c=clusters[i]; | |
60 | lab=TMath::Abs(c->GetLabel(0)); | |
61 | Int_t j; | |
62 | for (j=0; j<noc; j++) if (lb[j]==lab || mx[j]==0) break; | |
63 | lb[j]=lab; | |
64 | (mx[j])++; | |
65 | } | |
66 | ||
67 | Int_t max=0; | |
68 | for (i=0; i<noc; i++) if (mx[i]>max) {max=mx[i]; lab=lb[i];} | |
69 | ||
bb9d1614 | 70 | max=0; |
be9c5115 | 71 | for (i=0; i<noc; i++) { |
72 | AliCluster *c=clusters[i]; | |
bb9d1614 | 73 | if (TMath::Abs(c->GetLabel(0)) == lab || |
74 | TMath::Abs(c->GetLabel(1)) == lab || | |
be9c5115 | 75 | TMath::Abs(c->GetLabel(2)) == lab ) max++; |
76 | } | |
77 | ||
78 | if ((1.- Float_t(max)/noc) > wrong) lab=-lab; | |
79 | t->SetLabel(lab); | |
80 | ||
81 | delete[] lb; | |
82 | delete[] mx; | |
83 | delete[] clusters; | |
84 | } | |
85 | ||
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); | |
95 | c->Use(); | |
96 | } | |
97 | } | |
98 | ||
41377c29 | 99 | //////////////////////////////////////////////////////////////////////// |
100 | Int_t AliTracker::SetFieldFactor() { | |
101 | // | |
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 | |
104 | // | |
1d5fc4ea | 105 | AliKalmanTrack:: |
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); | |
41377c29 | 109 | return 0; |
110 | } | |
111 | //////////////////////////////////////////////////////////////////////// | |
112 | Int_t AliTracker::SetFieldFactor(TFile *file, Bool_t deletegAlice) { | |
113 | // | |
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 | |
116 | // | |
117 | if (!(gAlice=(AliRun*)file->Get("gAlice"))) { | |
1d5fc4ea | 118 | ::Warning |
119 | ("SetFieldFactor","gAlice has not been found in file %s\n",file->GetName()); | |
41377c29 | 120 | return 1; |
121 | } | |
122 | Int_t rc = SetFieldFactor(); | |
123 | if (deletegAlice) { | |
124 | delete gAlice; | |
125 | gAlice = 0; | |
126 | } | |
127 | return rc; | |
128 | } | |
129 | //////////////////////////////////////////////////////////////////////// | |
e24ea474 | 130 | Int_t AliTracker::SetFieldFactor(const char* fileName, Bool_t closeFile) { |
41377c29 | 131 | // |
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 | |
134 | // | |
135 | TFile *file=TFile::Open(fileName); | |
1d5fc4ea | 136 | if (!file->IsOpen()) { |
137 | ::Warning("AliTracker::SetFieldFactor","Cannnot open %s !\n",fileName); | |
138 | return 1; | |
139 | } | |
41377c29 | 140 | Int_t rc = SetFieldFactor(file, closeFile) ; |
141 | if (closeFile) file->Close(); | |
142 | return rc; | |
143 | } | |
144 | //////////////////////////////////////////////////////////////////////// | |
be9c5115 | 145 |