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 **************************************************************************/
16 ////////////////////////////////////////////////////////////////////////////
20 // Author: J. Klein (Jochen.Klein@cern.ch) //
22 ////////////////////////////////////////////////////////////////////////////
24 /* $Id: AliTRDtrackGTU.cxx 27566 2008-07-24 15:31:08Z cblume $ */
27 #include "TObjArray.h"
32 #include "AliESDTrdTrack.h"
34 #include "AliTRDgtuParam.h"
35 #include "AliTRDtrackGTU.h"
36 #include "AliTRDtrackletGTU.h"
37 #include "AliTRDtrackletMCM.h"
38 #include "AliESDTrdTrack.h"
40 ClassImp(AliTRDtrackGTU)
42 AliTRDtrackGTU::AliTRDtrackGTU() :
60 fTracklets = new TClonesArray("AliTRDtrackletGTU", 6);
61 for (Int_t iTracklet = 0; iTracklet < 6; iTracklet++)
62 new ((*fTracklets)[iTracklet]) AliTRDtrackletGTU();
63 // fTracklets->BypassStreamer(kFALSE);
66 AliTRDtrackGTU::AliTRDtrackGTU(const AliTRDtrackGTU &rhs) :
72 fTrackletMask(rhs.fTrackletMask),
73 fNTracklets(rhs.fNTracklets),
74 fRefLayerIdx(rhs.fRefLayerIdx),
75 fZChannel(rhs.fZChannel),
76 fZSubChannel(rhs.fZSubChannel),
82 fTracklets = new TClonesArray("AliTRDtrackletGTU", 6);
83 for (Int_t iTracklet = 0; iTracklet < 6; iTracklet++)
84 new ((*fTracklets)[iTracklet]) AliTRDtrackletGTU(*((AliTRDtrackletGTU*)(*(rhs.fTracklets))[iTracklet]));
87 AliTRDtrackGTU& AliTRDtrackGTU::operator=(const AliTRDtrackGTU &rhs)
90 TObject::operator=(rhs);
92 fSector = rhs.fSector;
94 fTrackletMask = rhs.fTrackletMask;
95 fNTracklets = rhs.fNTracklets;
96 fRefLayerIdx = rhs.fRefLayerIdx;
97 fZChannel = rhs.fZChannel;
98 fZSubChannel = rhs.fZSubChannel;
103 for (Int_t iTracklet = 0; iTracklet < 6; iTracklet++)
104 new ((*fTracklets)[iTracklet]) AliTRDtrackletGTU(*((AliTRDtrackletGTU*)(*(rhs.fTracklets))[iTracklet]));
110 AliTRDtrackGTU::~AliTRDtrackGTU()
114 fTracklets->Delete();
118 void AliTRDtrackGTU::AddTracklet(const AliTRDtrackletGTU * const tracklet, Int_t layer)
120 // add a tracklet to this track
122 if ( (fTrackletMask & (1 << layer)) != 0 ) {
123 AliError(Form("Only one tracklet per layer (%i) possible! Mask: 0x%02x", layer, fTrackletMask));
127 new ((*fTracklets)[layer]) AliTRDtrackletGTU(*tracklet);
129 fTrackletMask |= (1 << layer);
132 AliTRDtrackletGTU* AliTRDtrackGTU::GetTracklet(Int_t layer) const
134 // get a pointer to the tracklet in the layer specified
136 if (IsTrackletInLayer(layer))
137 return ((AliTRDtrackletGTU*) (*fTracklets)[layer]);
142 Int_t AliTRDtrackGTU::GetNTracklets() const
144 // returns the number of tracklets in this track
149 Bool_t AliTRDtrackGTU::IsTrackletInLayer(Int_t layer) const
151 // checks for a tracklet in the given layer
153 if ( (GetTrackletMask() & (1 << layer)) != 0)
159 void AliTRDtrackGTU::SetFitParams(Float_t a, Float_t b, Float_t c)
161 // set the fit parameters
168 Int_t AliTRDtrackGTU::GetZSubChannel()
170 // returns the z-subchannel
172 if (fZSubChannel < 0) {
173 for (Int_t layer = 0; layer < AliTRDgtuParam::GetNLayers(); layer++)
175 if (IsTrackletInLayer(layer))
176 fZSubChannel = ((AliTRDtrackletGTU*) (*fTracklets)[layer])->GetSubChannel(GetZChannel());
182 Int_t AliTRDtrackGTU::GetYapprox()
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
188 if ((fRefLayerIdx > -1) && (fRefLayerIdx < AliTRDgtuParam::GetNRefLayers()))
189 return ((AliTRDtrackletGTU*) (*fTracklets)[AliTRDgtuParam::GetRefLayer(fRefLayerIdx)])->GetYProj();
194 AliESDTrdTrack* AliTRDtrackGTU::CreateTrdTrack() const
196 // creates an AliESDTrdTrack to be added to the ESD
198 AliESDTrdTrack *trk = new AliESDTrdTrack();
199 trk->SetA((Int_t) fA);
200 trk->SetLayerMask(fTrackletMask);
202 trk->SetB((Int_t) fB);
203 trk->SetStack(fStack);
204 trk->SetSector(fSector);
205 trk->SetLabel(fLabel);
207 for (Int_t iLayer = 0; iLayer < AliTRDgtuParam::GetNLayers(); iLayer++) {
208 AliTRDtrackletGTU *trklGTU = GetTracklet(iLayer);
210 trk->SetTrackletIndex(trklGTU->GetIndex(), iLayer);
211 AliESDTrdTracklet *trkl = trklGTU->GetTrackletESD();
213 trk->AddTrackletReference(trkl, iLayer);
220 Bool_t AliTRDtrackGTU::CookLabel()
222 // assign label from tracklets according to frequency
225 Int_t label[6] = { 0 };
226 Int_t count[6] = { 0 };
228 for (Int_t iTracklet = 0; iTracklet < 6; iTracklet++) {
229 if (!IsTrackletInLayer(iTracklet))
232 Int_t currLabel = GetTracklet(iTracklet)->GetLabel();
234 Bool_t assigned = kFALSE;
235 for (Int_t iLabel = 0; iLabel < nLabels; iLabel++) {
236 if (currLabel == label[iLabel]) {
244 label[nLabels] = currLabel;
251 TMath::Sort(6, count, index);
252 fLabel = label[index[0]];