RAW/AliHoughFilter.cxx

   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 /* $Id$ */
  17
  18 ///////////////////////////////////////////////////////////////////////////////
  19 //                                                                           //
  20 // high level filter algorithm for TPC using a hough transformation          //
  21 //                                                                           //
  22 ///////////////////////////////////////////////////////////////////////////////
  23
  24 #include <TStopwatch.h>
  25
  26 #include "AliL3StandardIncludes.h"
  27 #include "AliL3Logging.h"
  28 #include "AliL3Transform.h"
  29 #include "AliL3Hough.h"
  30 #include "AliLog.h"
  31 #include <AliL3ITSclusterer.h>
  32 #include <AliL3ITSVertexerZ.h>
  33 #include <AliL3ITStracker.h>
  34
  35 #include "AliHoughFilter.h"
  36
  37 #include "AliRawReaderRoot.h"
  38 #include <AliMagF.h>
  39 #include <AliMagFMaps.h>
  40 #include <AliKalmanTrack.h>
  41 #include <AliITSgeom.h>
  42
  43 ClassImp(AliHoughFilter)
  44
  45 //_____________________________________________________________________________
  46 AliHoughFilter::AliHoughFilter()
  47 {
  48 // default constructor
  49
  50   // Init debug level
  51   AliL3Log::fgLevel = AliL3Log::kError;
  52   if (AliDebugLevel() > 0) AliL3Log::fgLevel = AliL3Log::kWarning;
  53   if (AliDebugLevel() > 1) AliL3Log::fgLevel = AliL3Log::kInformational;
  54   if (AliDebugLevel() > 2) AliL3Log::fgLevel = AliL3Log::kDebug;
  55
  56   // Init TPC HLT geometry
  57   const char *path = gSystem->Getenv("ALICE_ROOT");
  58   Char_t pathname[1024];
  59   strcpy(pathname,path);
  60   strcat(pathname,"/HLT/src");
  61   if (!AliL3Transform::Init(pathname, kFALSE))
  62     AliError("HLT initialization failed!");
  63
  64   // Init magnetic field
  65   AliMagF* field = new AliMagFMaps("Maps","Maps", 2, 1., 10., AliMagFMaps::k5kG);
  66   AliTracker::SetFieldMap(field,kTRUE);
  67   fPtmin = 0.1*AliL3Transform::GetSolenoidField();
  68
  69   // Init ITS geometry
  70   fITSgeom = new AliITSgeom();
  71   fITSgeom->ReadNewFile("$ALICE_ROOT/ITS/ITSgeometry_vPPRasymmFMD.det");
  72   if (!fITSgeom)
  73     AliError("ITS geometry not found!");
  74
  75   // Init PID
  76   AliPID pid;
  77 }
  78
  79 //_____________________________________________________________________________
  80 Bool_t AliHoughFilter::Filter(AliRawEvent* event, AliESD* esd)
  81 {
  82   // Run fast online reconstruction
  83   // based on the HLT tracking algorithms
  84
  85   TStopwatch globaltimer;
  86   globaltimer.Start();
  87
  88   TStopwatch timer;
  89   timer.Start();
  90
  91   TTree *treeITSclusters = new TTree("TreeL3ITSclusters"," "); //make a tree
  92   treeITSclusters->SetDirectory(0);
  93
  94   RunITSclusterer(event,treeITSclusters);
  95   RunITSvertexer(esd,treeITSclusters);
  96   RunTPCtracking(event,esd);
  97   RunITStracking(esd,treeITSclusters);
  98   delete treeITSclusters;
  99
 100   AliInfo(Form("Event filter has finished in %f seconds\n\n\n\n\n\n",globaltimer.RealTime()));
 101
 102   return kTRUE;
 103 }
 104
 105 //_____________________________________________________________________________
 106 void AliHoughFilter::RunITSclusterer(AliRawEvent* event, TTree *treeClusters)
 107 {
 108   // Run ITS Clusterer
 109   // The clusters are stored in a tree
 110
 111   TStopwatch timer;
 112   timer.Start();
 113
 114   if(!fITSgeom)
 115     AliError("ITS geometry not created!");
 116   AliL3ITSclusterer clusterer(fITSgeom);
 117   AliRawReader *itsrawreader=new AliRawReaderRoot(event);
 118   clusterer.Digits2Clusters(itsrawreader,treeClusters);
 119   delete itsrawreader;
 120   AliInfo(Form("ITS clusterer has finished in %f seconds\n",timer.RealTime()));
 121
 122 }
 123
 124
 125 //_____________________________________________________________________________
 126 void AliHoughFilter::RunITSvertexer(AliESD* esd, TTree *treeClusters)
 127 {
 128   // Run SPD vertexerZ
 129   // Store the result in the ESD
 130
 131   TStopwatch timer;
 132   timer.Start();
 133
 134   AliL3ITSVertexerZ vertexer;
 135   AliESDVertex *vertex = vertexer.FindVertexForCurrentEvent(fITSgeom,treeClusters);
 136   esd->SetVertex(vertex);
 137   AliInfo(Form("ITS vertexer has finished in %f seconds\n",timer.RealTime()));
 138
 139 }
 140
 141 //_____________________________________________________________________________
 142 void AliHoughFilter::RunTPCtracking(AliRawEvent* event, AliESD* esd)
 143 {
 144   // Run hough transform tracking in TPC
 145   // The z of the vertex is taken from the ESD
 146   // The result of the tracking is stored in the ESD
 147   TStopwatch timer;
 148   timer.Start();
 149
 150   const AliESDVertex *vertex = esd->GetVertex();
 151   Float_t zvertex = vertex->GetZv();
 152
 153   AliL3Hough *hough1 = new AliL3Hough();
 154
 155   hough1->SetThreshold(4);
 156   hough1->CalcTransformerParams(fPtmin);
 157   hough1->SetPeakThreshold(70,-1);
 158   hough1->Init(100,4,event,zvertex);
 159   hough1->SetAddHistograms();
 160
 161   AliL3Hough *hough2 = new AliL3Hough();
 162
 163   hough2->SetThreshold(4);
 164   hough2->CalcTransformerParams(fPtmin);
 165   hough2->SetPeakThreshold(70,-1);
 166   hough2->Init(100,4,event,zvertex);
 167   hough2->SetAddHistograms();
 168
 169   Int_t nglobaltracks = 0;
 170   /* In case we run HLT code in 2 threads */
 171   hough1->StartProcessInThread(0,17);
 172   hough2->StartProcessInThread(18,35);
 173
 174   if(hough1->WaitForThreadFinish())
 175     ::Fatal("AliL3Hough::WaitForThreadFinish"," Can not join the required thread! ");
 176   if(hough2->WaitForThreadFinish())
 177     ::Fatal("AliL3Hough::WaitForThreadFinish"," Can not join the required thread! ");
 178
 179     /* In case we run HLT code in the main thread
 180     for(Int_t slice=0; slice<=17; slice++)
 181       {
 182         hough1->ReadData(slice,0);
 183         hough1->Transform();
 184         hough1->AddAllHistogramsRows();
 185         hough1->FindTrackCandidatesRow();
 186         hough1->AddTracks();
 187       }
 188     for(Int_t slice=18; slice<=35; slice++)
 189       {
 190         hough2->ReadData(slice,0);
 191         hough2->Transform();
 192         hough2->AddAllHistogramsRows();
 193         hough2->FindTrackCandidatesRow();
 194         hough2->AddTracks();
 195       }
 196     */
 197
 198   nglobaltracks += hough1->FillESD(esd);
 199   nglobaltracks += hough2->FillESD(esd);
 200
 201     /* In case we want to debug the ESD
 202     gSystem->MakeDirectory("hough1");
 203     hough1->WriteTracks("./hough1");
 204     gSystem->MakeDirectory("hough2");
 205     hough2->WriteTracks("./hough2");
 206     */
 207
 208   delete hough1;
 209   delete hough2;
 210
 211   AliInfo(Form("\nHough Transformer has found %d TPC tracks in %f seconds\n\n", nglobaltracks,timer.RealTime()));
 212
 213 }
 214
 215 //_____________________________________________________________________________
 216 void AliHoughFilter::RunITStracking(AliESD* esd, TTree *treeClusters)
 217 {
 218   // Run the ITS tracker
 219   // The tracks from the HT TPC tracking are used as seeds
 220   // The prologated tracks are updated in the ESD
 221   TStopwatch timer;
 222   timer.Start();
 223
 224   Double_t vtxPos[3];
 225   Double_t vtxErr[3]={0.005,0.005,0.010};
 226   const AliESDVertex *vertex = esd->GetVertex();
 227   vertex->GetXYZ(vtxPos);
 228
 229   AliL3ITStracker itsTracker(fITSgeom);
 230   itsTracker.SetVertex(vtxPos,vtxErr);
 231
 232   itsTracker.LoadClusters(treeClusters);
 233   itsTracker.Clusters2Tracks(esd);
 234   itsTracker.UnloadClusters();
 235   AliInfo(Form("ITS tracker has finished in %f seconds\n",timer.RealTime()));
 236
 237 }