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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 | ||
16 | //////////////////////////////////////////////////////////////////////////// | |
17 | // // | |
18 | // A GTU track // | |
19 | // // | |
20 | // Author: J. Klein (Jochen.Klein@cern.ch) // | |
21 | // // | |
22 | //////////////////////////////////////////////////////////////////////////// | |
23 | ||
24 | /* $Id: AliTRDtrackGTU.cxx 27566 2008-07-24 15:31:08Z cblume $ */ | |
25 | ||
26 | #include "TObject.h" | |
27 | #include "TObjArray.h" | |
28 | #include "TClass.h" | |
29 | #include "TH1F.h" | |
30 | ||
31 | #include "AliLog.h" | |
32 | #include "AliTRDgtuParam.h" | |
33 | #include "AliTRDtrackGTU.h" | |
34 | #include "AliTRDtrackletGTU.h" | |
35 | #include "AliTRDtrackletMCM.h" | |
36 | #include "AliESDTrdTrack.h" | |
37 | ||
38 | ClassImp(AliTRDtrackGTU) | |
39 | ||
40 | AliTRDtrackGTU::AliTRDtrackGTU() : | |
41 | TObject(), | |
42 | fStack(-1), | |
43 | fSector(-1), | |
44 | fPt(0), | |
45 | fPID(0), | |
46 | fTracklets(0x0), | |
47 | fTrackletMask(0), | |
48 | fNTracklets(0), | |
49 | fRefLayerIdx(-1), | |
50 | fZChannel(-1), | |
51 | fZSubChannel(-1), | |
52 | fA(0), | |
53 | fB(0), | |
54 | fC(0), | |
55 | fLabel(-1) | |
56 | { | |
57 | // default ctor | |
58 | ||
59 | fTracklets = new TClonesArray("AliTRDtrackletGTU", 6); | |
60 | for (Int_t iTracklet = 0; iTracklet < 6; iTracklet++) | |
61 | new ((*fTracklets)[iTracklet]) AliTRDtrackletGTU(); | |
62 | // fTracklets->BypassStreamer(kFALSE); | |
63 | } | |
64 | ||
65 | AliTRDtrackGTU::~AliTRDtrackGTU() | |
66 | { | |
67 | // dtor | |
68 | ||
69 | fTracklets->Delete(); | |
70 | delete fTracklets; | |
71 | } | |
72 | ||
73 | void AliTRDtrackGTU::AddTracklet(AliTRDtrackletGTU *tracklet, Int_t layer) | |
74 | { | |
75 | // add a tracklet to this track | |
76 | ||
77 | if ( (fTrackletMask & (1 << layer)) != 0 ) { | |
78 | AliError(Form("Only one tracklet per layer (%i) possible! Mask: 0x%02x", layer, fTrackletMask)); | |
79 | return; | |
80 | } | |
81 | ||
82 | new ((*fTracklets)[layer]) AliTRDtrackletGTU(*tracklet); | |
83 | fNTracklets++; | |
84 | fTrackletMask |= (1 << layer); | |
85 | } | |
86 | ||
87 | AliTRDtrackletGTU* AliTRDtrackGTU::GetTracklet(Int_t layer) | |
88 | { | |
89 | // get a pointer to the tracklet in the layer specified | |
90 | ||
91 | return ((AliTRDtrackletGTU*) (*fTracklets)[layer]); | |
92 | } | |
93 | ||
94 | Int_t AliTRDtrackGTU::GetNTracklets() const | |
95 | { | |
96 | // returns the number of tracklets in this track | |
97 | ||
98 | return fNTracklets; | |
99 | } | |
100 | ||
101 | Bool_t AliTRDtrackGTU::IsTrackletInLayer(Int_t layer) const | |
102 | { | |
103 | // checks for a tracklet in the given layer | |
104 | ||
105 | if ( (GetTrackletMask() & (1 << layer)) != 0) | |
106 | return kTRUE; | |
107 | else | |
108 | return kFALSE; | |
109 | } | |
110 | ||
111 | void AliTRDtrackGTU::SetFitParams(Float_t a, Float_t b, Float_t c) | |
112 | { | |
113 | // set the fit parameters | |
114 | ||
115 | fA = a; | |
116 | fB = b; | |
117 | fC = c; | |
118 | } | |
119 | ||
120 | Int_t AliTRDtrackGTU::GetZSubChannel() | |
121 | { | |
122 | // returns the z-subchannel | |
123 | ||
124 | if (fZSubChannel < 0) { | |
125 | for (Int_t layer = 0; layer < AliTRDgtuParam::GetNLayers(); layer++) | |
126 | { | |
127 | if (IsTrackletInLayer(layer)) | |
128 | fZSubChannel = ((AliTRDtrackletGTU*) (*fTracklets)[layer])->GetSubChannel(GetZChannel()); | |
129 | } | |
130 | } | |
131 | return fZSubChannel; | |
132 | } | |
133 | ||
134 | Int_t AliTRDtrackGTU::GetYapprox() | |
135 | { | |
136 | // returns an approximated y-position for the track | |
137 | ||
138 | for (Int_t layer = 0; layer < AliTRDgtuParam::GetNLayers(); layer++) | |
139 | { | |
140 | if (IsTrackletInLayer(layer)) | |
141 | return ((AliTRDtrackletGTU*) (*fTracklets)[layer])->GetYProj(); | |
142 | } | |
143 | return 0; | |
144 | } | |
145 | ||
146 | AliESDTrdTrack* AliTRDtrackGTU::CreateTrdTrack() const | |
147 | { | |
148 | // creates an AliESDTrdTrack to be added to the ESD | |
149 | ||
150 | AliESDTrdTrack *trk = new AliESDTrdTrack(); | |
151 | trk->SetPt(1./128. * fPt); | |
152 | trk->SetPID(fPID); | |
153 | trk->SetDetector((Char_t) (fSector * 5 + fStack)); | |
154 | if (fLabel >= 0) | |
155 | trk->SetLabel(fLabel); | |
156 | AliInfo(Form("setting detector to: %i (sector: %i, stack: %i), readback: %i", fSector * 30 + fStack * 6, fSector, fStack, trk->GetDetector())); | |
157 | return trk; | |
158 | } | |
159 | ||
160 | Bool_t AliTRDtrackGTU::CookLabel() | |
161 | { | |
162 | TH1F *h = new TH1F("trkref", "trkref", 100000, 0, 100000); | |
163 | for (Int_t iTracklet = 0; iTracklet < 6; iTracklet++) { | |
164 | h->Fill( ((AliTRDtrackletGTU*) (*fTracklets)[iTracklet])->GetLabel()); | |
165 | } | |
166 | if (h->GetEntries() > 0) | |
167 | fLabel = h->GetMaximumBin(); | |
168 | else | |
169 | fLabel = -1; | |
170 | delete h; | |
171 | return (fLabel >= 0); | |
172 | } |