- generalize ReadTracklets and ReadTracks in clusterizer to read
[u/mrichter/AliRoot.git] / TRD / AliTRDtrackGTU.cxx
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52c19022 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"
4cc89512 28#include "TClass.h"
2f1bde31 29#include "TMath.h"
4cc89512 30#include "TH1F.h"
52c19022 31
4d6aee34 32#include "AliESDTrdTrack.h"
52c19022 33#include "AliLog.h"
34#include "AliTRDgtuParam.h"
35#include "AliTRDtrackGTU.h"
36#include "AliTRDtrackletGTU.h"
4cc89512 37#include "AliTRDtrackletMCM.h"
52c19022 38#include "AliESDTrdTrack.h"
39
40ClassImp(AliTRDtrackGTU)
5f006bd7 41
52c19022 42AliTRDtrackGTU::AliTRDtrackGTU() :
43 TObject(),
44 fStack(-1),
45 fSector(-1),
52c19022 46 fPID(0),
47 fTracklets(0x0),
48 fTrackletMask(0),
49 fNTracklets(0),
50 fRefLayerIdx(-1),
51 fZChannel(-1),
52 fZSubChannel(-1),
53 fA(0),
54 fB(0),
4cc89512 55 fC(0),
56 fLabel(-1)
52c19022 57{
4cc89512 58// default ctor
59
52c19022 60 fTracklets = new TClonesArray("AliTRDtrackletGTU", 6);
61 for (Int_t iTracklet = 0; iTracklet < 6; iTracklet++)
62 new ((*fTracklets)[iTracklet]) AliTRDtrackletGTU();
63// fTracklets->BypassStreamer(kFALSE);
64}
65
dd09a2e2 66AliTRDtrackGTU::AliTRDtrackGTU(const AliTRDtrackGTU &rhs) :
67 TObject(),
68 fStack(rhs.fStack),
69 fSector(rhs.fSector),
70 fPID(rhs.fPID),
71 fTracklets(0x0),
72 fTrackletMask(rhs.fTrackletMask),
73 fNTracklets(rhs.fNTracklets),
74 fRefLayerIdx(rhs.fRefLayerIdx),
75 fZChannel(rhs.fZChannel),
76 fZSubChannel(rhs.fZSubChannel),
77 fA(rhs.fA),
78 fB(rhs.fB),
79 fC(rhs.fC),
80 fLabel(rhs.fLabel)
81{
82 fTracklets = new TClonesArray("AliTRDtrackletGTU", 6);
83 for (Int_t iTracklet = 0; iTracklet < 6; iTracklet++)
84 new ((*fTracklets)[iTracklet]) AliTRDtrackletGTU(*((AliTRDtrackletGTU*)(*(rhs.fTracklets))[iTracklet]));
85}
86
87AliTRDtrackGTU& AliTRDtrackGTU::operator=(const AliTRDtrackGTU &rhs)
88{
89 if (&rhs != this) {
90 TObject::operator=(rhs);
91 fStack = rhs.fStack;
92 fSector = rhs.fSector;
93 fPID = rhs.fPID;
94 fTrackletMask = rhs.fTrackletMask;
95 fNTracklets = rhs.fNTracklets;
96 fRefLayerIdx = rhs.fRefLayerIdx;
97 fZChannel = rhs.fZChannel;
98 fZSubChannel = rhs.fZSubChannel;
99 fA = rhs.fA;
100 fB = rhs.fB;
101 fC = rhs.fC;
102 fLabel = rhs.fLabel;
103 for (Int_t iTracklet = 0; iTracklet < 6; iTracklet++)
104 new ((*fTracklets)[iTracklet]) AliTRDtrackletGTU(*((AliTRDtrackletGTU*)(*(rhs.fTracklets))[iTracklet]));
105 }
106
107 return *this;
108}
109
52c19022 110AliTRDtrackGTU::~AliTRDtrackGTU()
111{
4cc89512 112// dtor
113
52c19022 114 fTracklets->Delete();
115 delete fTracklets;
116}
117
5f006bd7 118void AliTRDtrackGTU::AddTracklet(const AliTRDtrackletGTU * const tracklet, Int_t layer)
52c19022 119{
4cc89512 120// add a tracklet to this track
121
52c19022 122 if ( (fTrackletMask & (1 << layer)) != 0 ) {
123 AliError(Form("Only one tracklet per layer (%i) possible! Mask: 0x%02x", layer, fTrackletMask));
124 return;
125 }
126
127 new ((*fTracklets)[layer]) AliTRDtrackletGTU(*tracklet);
128 fNTracklets++;
129 fTrackletMask |= (1 << layer);
130}
131
44eafcf2 132AliTRDtrackletGTU* AliTRDtrackGTU::GetTracklet(Int_t layer) const
52c19022 133{
4cc89512 134// get a pointer to the tracklet in the layer specified
135
80f93426 136 if (IsTrackletInLayer(layer))
137 return ((AliTRDtrackletGTU*) (*fTracklets)[layer]);
5f006bd7 138 else
80f93426 139 return 0x0;
52c19022 140}
141
142Int_t AliTRDtrackGTU::GetNTracklets() const
143{
4cc89512 144// returns the number of tracklets in this track
145
52c19022 146 return fNTracklets;
147}
148
5f006bd7 149Bool_t AliTRDtrackGTU::IsTrackletInLayer(Int_t layer) const
52c19022 150{
4cc89512 151// checks for a tracklet in the given layer
152
52c19022 153 if ( (GetTrackletMask() & (1 << layer)) != 0)
154 return kTRUE;
5f006bd7 155 else
52c19022 156 return kFALSE;
157}
158
5f006bd7 159void AliTRDtrackGTU::SetFitParams(Float_t a, Float_t b, Float_t c)
52c19022 160{
4cc89512 161// set the fit parameters
162
5f006bd7 163 fA = a;
52c19022 164 fB = b;
165 fC = c;
166}
167
5f006bd7 168Int_t AliTRDtrackGTU::GetZSubChannel()
52c19022 169{
4cc89512 170// returns the z-subchannel
171
52c19022 172 if (fZSubChannel < 0) {
173 for (Int_t layer = 0; layer < AliTRDgtuParam::GetNLayers(); layer++)
174 {
175 if (IsTrackletInLayer(layer))
176 fZSubChannel = ((AliTRDtrackletGTU*) (*fTracklets)[layer])->GetSubChannel(GetZChannel());
177 }
178 }
179 return fZSubChannel;
180}
181
5f006bd7 182Int_t AliTRDtrackGTU::GetYapprox()
52c19022 183{
d2c8b010 184 // returns an approximated y-position for the track
185 // taken from the projected y-position of the tracklet in the reference layer
186 // in which the track was found
4cc89512 187
d2c8b010 188 if ((fRefLayerIdx > -1) && (fRefLayerIdx < AliTRDgtuParam::GetNRefLayers()))
189 return ((AliTRDtrackletGTU*) (*fTracklets)[AliTRDgtuParam::GetRefLayer(fRefLayerIdx)])->GetYProj();
190 else
191 return 0;
52c19022 192}
193
194AliESDTrdTrack* AliTRDtrackGTU::CreateTrdTrack() const
195{
44eafcf2 196 // creates an AliESDTrdTrack to be added to the ESD
197
198 AliESDTrdTrack *trk = new AliESDTrdTrack();
199 trk->SetA((Int_t) fA);
200 trk->SetLayerMask(fTrackletMask);
201 trk->SetPID(fPID);
202 trk->SetB((Int_t) fB);
203 trk->SetStack(fStack);
204 trk->SetSector(fSector);
2f1bde31 205 trk->SetLabel(fLabel);
44eafcf2 206
207 for (Int_t iLayer = 0; iLayer < AliTRDgtuParam::GetNLayers(); iLayer++) {
208 AliTRDtrackletGTU *trklGTU = GetTracklet(iLayer);
209 if (trklGTU) {
a10c6981 210 trk->SetTrackletIndex(trklGTU->GetIndex(), iLayer);
44eafcf2 211 AliESDTrdTracklet *trkl = trklGTU->GetTrackletESD();
212 if (trkl)
213 trk->AddTrackletReference(trkl, iLayer);
214 }
215 }
52cd0cc0 216
44eafcf2 217 return trk;
52c19022 218}
4cc89512 219
5f006bd7 220Bool_t AliTRDtrackGTU::CookLabel()
4cc89512 221{
2f1bde31 222 // assign label from tracklets according to frequency
223
224 Int_t nLabels = 0;
3eefbe0b 225 Int_t label[6] = { 0 };
226 Int_t count[6] = { 0 };
2f1bde31 227
228 for (Int_t iTracklet = 0; iTracklet < 6; iTracklet++) {
229 if (!IsTrackletInLayer(iTracklet))
230 continue;
231
232 Int_t currLabel = GetTracklet(iTracklet)->GetLabel();
233
234 Bool_t assigned = kFALSE;
235 for (Int_t iLabel = 0; iLabel < nLabels; iLabel++) {
236 if (currLabel == label[iLabel]) {
237 count[iLabel]++;
238 assigned = kTRUE;
239 break;
240 }
4cc89512 241 }
2f1bde31 242
243 if (!assigned) {
244 label[nLabels] = currLabel;
245 count[nLabels] = 1;
246 nLabels++;
247 }
248 }
249
6d96036a 250 Int_t index[32];
3eefbe0b 251 TMath::Sort(6, count, index);
252 fLabel = label[index[0]];
2f1bde31 253
254 return kTRUE;
4cc89512 255}