HLT/hough/AliL3HoughEval.cxx

   1 //$Id$
   2
   3 // Author: Anders Vestbo <mailto:vestbo@fi.uib.no>
   4 //*-- Copyright &copy ASV
   5
   6 #include <math.h>
   7 #include <iostream.h>
   8 #ifdef use_root
   9 #include <TH1.h>
  10 #include <TFile.h>
  11 #endif
  12 #include "AliL3MemHandler.h"
  13 #include "AliL3TrackArray.h"
  14 #include "AliL3Logging.h"
  15 #include "AliL3HoughEval.h"
  16 #include "AliL3HoughBaseTransformer.h"
  17 #include "AliL3DigitData.h"
  18 #include "AliL3HoughTrack.h"
  19 #include "AliL3Transform.h"
  20 #include "AliL3Histogram.h"
  21 #include "AliL3Histogram1D.h"
  22
  23 //_____________________________________________________________
  24 // AliL3HoughEval
  25 //
  26 // Evaluation class for tracklets produced by the Hough transform.
  27
  28 ClassImp(AliL3HoughEval)
  29
  30 AliL3HoughEval::AliL3HoughEval()
  31 {
  32
  33   fRemoveFoundTracks = kFALSE;
  34   fNumOfPadsToLook = 1;
  35   fNumOfRowsToMiss = 1;
  36   fEtaHistos=0;
  37   fRowPointers = 0;
  38 }
  39
  40
  41 AliL3HoughEval::~AliL3HoughEval()
  42 {
  43   fHoughTransformer = 0;
  44   if(fRowPointers)
  45     {
  46       for(Int_t i=0; i<fNrows; i++)
  47         fRowPointers[i] = 0;
  48       delete [] fRowPointers;
  49     }
  50 }
  51
  52 void AliL3HoughEval::InitTransformer(AliL3HoughBaseTransformer *transformer)
  53 {
  54   fHoughTransformer = transformer;
  55   fSlice = fHoughTransformer->GetSlice();
  56   fPatch = fHoughTransformer->GetPatch();
  57   fNrows = AliL3Transform::GetLastRow(fPatch) - AliL3Transform::GetFirstRow(fPatch) + 1;
  58   fNEtaSegments = fHoughTransformer->GetNEtaSegments();
  59   fEtaMin = fHoughTransformer->GetEtaMin();
  60   fEtaMax = fHoughTransformer->GetEtaMax();
  61   GenerateLUT();
  62 }
  63
  64 void AliL3HoughEval::GenerateLUT()
  65 {
  66   //Generate a Look-up table, to limit the access to raw data
  67
  68   if(!fRowPointers)
  69     fRowPointers = new AliL3DigitRowData*[fNrows];
  70
  71   AliL3DigitRowData *tempPt = (AliL3DigitRowData*)fHoughTransformer->GetDataPointer();
  72   if(!tempPt)
  73     printf("\nAliL3HoughEval::GenerateLUT : Zero data pointer\n");
  74
  75   for(Int_t i=AliL3Transform::GetFirstRow(fPatch); i<=AliL3Transform::GetLastRow(fPatch); i++)
  76     {
  77       Int_t prow = i - AliL3Transform::GetFirstRow(fPatch);
  78       fRowPointers[prow] = tempPt;
  79       AliL3MemHandler::UpdateRowPointer(tempPt);
  80     }
  81
  82 }
  83
  84 Bool_t AliL3HoughEval::LookInsideRoad(AliL3HoughTrack *track,Int_t eta_index,Bool_t remove)
  85 {
  86   //Look at rawdata along the road specified by the track candidates.
  87   //If track is good, return true, if not return false.
  88
  89   Int_t sector,row;
  90
  91   Int_t nrow=0,npixs=0,rows_crossed=0;
  92   Float_t xyz[3];
  93
  94   Int_t total_charge=0;//total charge along the road
  95
  96   //Check if the track is leaving the sector at some point
  97   Float_t maxrow=300;
  98   Double_t angle=AliL3Transform::Pi()/18;
  99   track->CalculateEdgePoint(angle);
 100   if(!track->IsPoint())
 101     {
 102       track->CalculateEdgePoint(-1.*angle);
 103       if(track->IsPoint())
 104         maxrow = track->GetPointX();
 105     }
 106   else
 107     maxrow = track->GetPointX();
 108
 109   for(Int_t padrow = AliL3Transform::GetFirstRow(fPatch); padrow <= AliL3Transform::GetLastRow(fPatch); padrow++)
 110     {
 111       if(AliL3Transform::Row2X(padrow) > maxrow) break;//The track has left this slice
 112       rows_crossed++;
 113       Int_t prow = padrow - AliL3Transform::GetFirstRow(fPatch);
 114       if(!track->GetCrossingPoint(padrow,xyz))
 115         {
 116           continue;
 117         }
 118
 119       AliL3Transform::Slice2Sector(fSlice,padrow,sector,row);
 120       AliL3Transform::Local2Raw(xyz,sector,row);
 121       npixs=0;
 122
 123
 124       //Get the timebins for this pad
 125       AliL3DigitRowData *tempPt = fRowPointers[prow];
 126       if(!tempPt)
 127         {
 128           printf("AliL3HoughEval::LookInsideRoad : Zero data pointer\n");
 129           continue;
 130         }
 131
 132       //Look at both sides of the pad:
 133       for(Int_t p=(Int_t)rint(xyz[1])-fNumOfPadsToLook; p<=(Int_t)rint(xyz[1])+fNumOfPadsToLook; p++)
 134         {
 135           AliL3DigitData *digPt = tempPt->fDigitData;
 136           for(UInt_t j=0; j<tempPt->fNDigit; j++)
 137             {
 138               UChar_t pad = digPt[j].fPad;
 139               if(pad < p) continue;
 140               if(pad > p) break;
 141               UShort_t time = digPt[j].fTime;
 142               Double_t eta = AliL3Transform::GetEta(padrow,pad,time);
 143               Int_t pixel_index = fHoughTransformer->GetEtaIndex(eta);
 144               if(pixel_index > eta_index) continue;
 145               if(pixel_index != eta_index) break;
 146               total_charge += digPt[j].fCharge;
 147               if(remove)
 148                 digPt[j].fCharge = 0; //Erase the track from image
 149               npixs++;
 150             }
 151         }
 152
 153       if(npixs > 1)//At least 2 digits on this padrow
 154         {
 155           nrow++;
 156         }
 157     }
 158   if(remove)
 159     return kTRUE;
 160
 161   if(nrow >= rows_crossed - fNumOfRowsToMiss)//this was a good track
 162     {
 163       if(fRemoveFoundTracks)
 164         LookInsideRoad(track,eta_index,kTRUE);
 165       return kTRUE;
 166     }
 167   else
 168     return kFALSE;
 169 }
 170
 171 void AliL3HoughEval::FindEta(AliL3TrackArray *tracks)
 172 {
 173
 174   Int_t sector,row;
 175   Float_t xyz[3];
 176
 177   Int_t ntracks = tracks->GetNTracks();
 178   fEtaHistos = new AliL3Histogram1D*[ntracks];
 179
 180   Char_t hname[100];
 181   for(Int_t i=0; i<ntracks; i++)
 182     {
 183       sprintf(hname,"etahist_%d",i);
 184       fEtaHistos[i] = new AliL3Histogram1D(hname,hname,100,0,1);
 185     }
 186   Double_t etaslice = (fEtaMax - fEtaMin)/fNEtaSegments;
 187
 188   for(Int_t ntr=0; ntr<ntracks; ntr++)
 189     {
 190       AliL3HoughTrack *track = (AliL3HoughTrack*)tracks->GetCheckedTrack(ntr);
 191       if(!track) continue;
 192       for(Int_t padrow = AliL3Transform::GetFirstRow(fPatch); padrow <= AliL3Transform::GetLastRow(fPatch); padrow++)
 193         {
 194           Int_t prow = padrow - AliL3Transform::GetFirstRow(fPatch);
 195
 196           if(!track->GetCrossingPoint(padrow,xyz))
 197             {
 198               printf("AliL3HoughEval::LookInsideRoad : Track does not cross line!!\n");
 199               continue;
 200             }
 201
 202           AliL3Transform::Slice2Sector(fSlice,padrow,sector,row);
 203           AliL3Transform::Local2Raw(xyz,sector,row);
 204
 205           //Get the timebins for this pad
 206           AliL3DigitRowData *tempPt = fRowPointers[prow];
 207           if(!tempPt)
 208             {
 209               printf("AliL3HoughEval::LookInsideRoad : Zero data pointer\n");
 210               continue;
 211             }
 212
 213           //Look at both sides of the pad:
 214           for(Int_t p=(Int_t)rint(xyz[1])-fNumOfPadsToLook; p<=(Int_t)rint(xyz[1])+fNumOfPadsToLook; p++)
 215             {
 216               AliL3DigitData *digPt = tempPt->fDigitData;
 217               for(UInt_t j=0; j<tempPt->fNDigit; j++)
 218                 {
 219                   UChar_t pad = digPt[j].fPad;
 220
 221                   if(pad < p) continue;
 222                   if(pad > p) break;
 223                   UShort_t time = digPt[j].fTime;
 224                   Double_t eta = AliL3Transform::GetEta(padrow,pad,time);
 225                   Int_t pixel_index = (Int_t)(eta/etaslice);
 226                   if(pixel_index > track->GetEtaIndex()+1) continue;
 227                   if(pixel_index < track->GetEtaIndex()-1) break;
 228                   fEtaHistos[ntr]->Fill(eta,digPt[j].fCharge);
 229                 }
 230             }
 231         }
 232     }
 233
 234   for(Int_t i=0; i<ntracks; i++)
 235     {
 236       AliL3Histogram1D *hist = fEtaHistos[i];
 237       Int_t max_bin = hist->GetMaximumBin();
 238       Double_t max_value = hist->GetBinContent(max_bin);
 239       AliL3HoughTrack *track = (AliL3HoughTrack*)tracks->GetCheckedTrack(i);
 240       if(!track) continue;
 241       if(hist->GetBinContent(max_bin-1)<max_value && hist->GetBinContent(max_bin+1)<max_value)
 242         {
 243           track->SetWeight((Int_t)max_value,kTRUE);
 244           track->SetEta(hist->GetBinCenter(max_bin));
 245           track->SetNHits(track->GetWeight());
 246         }
 247       else
 248         {
 249           track->SetWeight(0);
 250           tracks->Remove(i); //remove this track, because it was not a peak
 251         }
 252     }
 253   tracks->Compress();
 254
 255   //for(Int_t i=0; i<ntracks; i++)
 256   //delete fEtaHistos[i];
 257   //delete [] fEtaHistos;
 258 }
 259
 260 void AliL3HoughEval::DisplayEtaSlice(Int_t eta_index,AliL3Histogram *hist)
 261 {
 262   //Display the current raw data inside the (slice,patch)
 263
 264   if(!hist)
 265     {
 266       printf("AliL3HoughEval::DisplayEtaSlice : No input histogram!\n");
 267       return;
 268     }
 269
 270   for(Int_t padrow = AliL3Transform::GetFirstRow(fPatch); padrow <= AliL3Transform::GetLastRow(fPatch); padrow++)
 271     {
 272       Int_t prow = padrow - AliL3Transform::GetFirstRow(fPatch);
 273
 274       AliL3DigitRowData *tempPt = fRowPointers[prow];
 275       if(!tempPt)
 276         {
 277           printf("AliL3HoughEval::DisplayEtaSlice : Zero data pointer\n");
 278           continue;
 279         }
 280
 281       AliL3DigitData *digPt = tempPt->fDigitData;
 282       if((Int_t)tempPt->fRow != padrow)
 283         {
 284           printf("\nAliL3HoughEval::DisplayEtaSlice : Mismatching padrows!!!\n");
 285           return;
 286         }
 287       for(UInt_t j=0; j<tempPt->fNDigit; j++)
 288         {
 289           UChar_t pad = digPt[j].fPad;
 290           UChar_t charge = digPt[j].fCharge;
 291           UShort_t time = digPt[j].fTime;
 292           if(charge < fHoughTransformer->GetThreshold()) continue;
 293           Float_t xyz[3];
 294           Int_t sector,row;
 295           AliL3Transform::Slice2Sector(fSlice,padrow,sector,row);
 296           AliL3Transform::Raw2Local(xyz,sector,row,pad,time);
 297           Double_t eta = AliL3Transform::GetEta(xyz);
 298           Int_t pixel_index = fHoughTransformer->GetEtaIndex(eta);//(Int_t)(eta/etaslice);
 299           if(pixel_index != eta_index) continue;
 300           hist->Fill(xyz[0],xyz[1],charge);
 301         }
 302     }
 303
 304 }
 305
 306 #ifdef use_root
 307 void AliL3HoughEval::CompareMC(AliL3TrackArray *tracks,Char_t *trackfile,Int_t threshold)
 308 {
 309   /*
 310   struct GoodTrack goodtracks[15000];
 311   Int_t nt=0;
 312   ifstream in(trackfile);
 313   if(in)
 314     {
 315       printf("Reading good tracks from file %s\n",trackfile);
 316       while (in>>goodtracks[nt].label>>goodtracks[nt].code>>
 317              goodtracks[nt].px>>goodtracks[nt].py>>goodtracks[nt].pz>>
 318              goodtracks[nt].pt>>goodtracks[nt].eta>>goodtracks[nt].nhits)
 319         {
 320           nt++;
 321           if (nt==15000)
 322             {
 323               cerr<<"Too many good tracks"<<endl;
 324               break;
 325             }
 326         }
 327       if (!in.eof())
 328         {
 329           LOG(AliL3Log::kError,"AliL3HoughEval::CompareMC","Input file")
 330             <<"Error in file reading"<<ENDLOG;
 331           return;
 332         }
 333     }
 334   else
 335     {
 336       LOG(AliL3Log::kError,"AliL3HoughEval::CompareMC","Input")
 337         <<"No input trackfile "<<trackfile<<ENDLOG;
 338     }
 339
 340   Int_t *particles = new Int_t[fNEtaSegments];
 341   Int_t *ftracks = new Int_t[fNEtaSegments];
 342   for(Int_t i=0; i<fNEtaSegments; i++)
 343     {
 344       particles[i]=0;
 345       ftracks[i]=0;
 346     }
 347
 348   TH1F *ptgood = new TH1F("ptgood","ptgood",5,0,2);
 349   TH1F *ptfound = new TH1F("ptfound","ptgood",5,0,2);
 350   TH1F *pteff = new TH1F("pteff","pteff",5,0,2);
 351   TH1F *etafound = new TH1F("etafound","etafound",5,0,1);
 352   TH1F *etagood = new TH1F("etagood","etagood",5,0,1);
 353   TH1F *etaeff = new TH1F("etaeff","etaeff",5,0,1);
 354
 355   Double_t etaslice = (fEtaMax - fEtaMin)/fNEtaSegments;
 356   for(Int_t i=0; i<tracks->GetNTracks(); i++)
 357     {
 358       AliL3HoughTrack *tr = (AliL3HoughTrack*)tracks->GetCheckedTrack(i);
 359       if(!tr) continue;
 360       if(tr->GetWeight()<threshold) continue;
 361       Int_t trackindex = tr->GetEtaIndex();
 362       if(trackindex <0 || trackindex >= fNEtaSegments) continue;
 363       ftracks[trackindex]++;
 364       ptfound->Fill(tr->GetPt());
 365       etafound->Fill(tr->GetEta());
 366     }
 367   for(Int_t i=0; i<nt; i++)
 368     {
 369       if(goodtracks[i].nhits < 174) continue;
 370       if(goodtracks[i].pt < 0.2) continue;
 371       Int_t particleindex = (Int_t)(goodtracks[i].eta/etaslice);
 372       if(particleindex < 0 || particleindex >= fNEtaSegments) continue;
 373       particles[particleindex]++;
 374       ptgood->Fill(goodtracks[i].pt);
 375       etagood->Fill(goodtracks[i].eta);
 376     }
 377
 378   Double_t found=0;
 379   Double_t good =0;
 380   for(Int_t i=0; i<fNEtaSegments; i++)
 381     {
 382       //printf("Slice %d : Found tracks %d, good tracks %d\n",i,ftracks[i],particles[i]);
 383       found += ftracks[i];
 384       good += particles[i];
 385     }
 386   printf("And the total efficiency was: %f\n",found/good);
 387
 388   ptgood->Sumw2(); ptfound->Sumw2();
 389   etagood->Sumw2(); etafound->Sumw2();
 390   pteff->Divide(ptfound,ptgood,1,1,"b");
 391   etaeff->Divide(etafound,etagood,1,1,"b");
 392   TFile *file = TFile::Open("eff.root","RECREATE");
 393   ptgood->Write();
 394   ptfound->Write();
 395   pteff->Write();
 396   etafound->Write();
 397   etagood->Write();
 398   etaeff->Write();
 399   file->Close();
 400
 401   delete [] particles;
 402   delete [] ftracks;
 403   */
 404 }
 405
 406 #endif