HLT/hough/AliL3HoughEval.cxx

   1 #include <TClonesArray.h>
   2 #include <TH2.h>
   3 #include <TH1.h>
   4 #include <TFile.h>
   5 #include <AliRun.h>
   6 #include <TParticle.h>
   7
   8 #include "AliL3TrackArray.h"
   9 #include "AliL3Transform.h"
  10 #include "AliL3HoughTransformer.h"
  11 #include "AliL3Defs.h"
  12 #include "AliL3HoughTrack.h"
  13 #include "AliL3HoughEval.h"
  14
  15 ClassImp(AliL3HoughEval)
  16
  17
  18 AliL3HoughEval::AliL3HoughEval()
  19 {
  20   //Default constructor
  21   fTransform = new AliL3Transform();
  22   fHoughTransformer = NULL;
  23 }
  24
  25
  26 AliL3HoughEval::AliL3HoughEval(AliL3HoughTransformer *transformer)
  27 {
  28   //Constructor
  29   fHoughTransformer = transformer;
  30   fTransform = new AliL3Transform();
  31 }
  32
  33
  34 AliL3HoughEval::~AliL3HoughEval()
  35 {
  36   //Destructor
  37   if(fTransform)
  38     delete fTransform;
  39
  40 }
  41
  42
  43 void AliL3HoughEval::LookInsideRoad(AliL3TrackArray *tracks,TH2F *hist,TH2F *fake)
  44 {
  45   //Look at rawdata along the road specified by the track candidates.
  46
  47   if(!fHoughTransformer)
  48     {
  49       printf("AliL3HoughEval: No transformer object\n");
  50       return;
  51     }
  52
  53   AliL3Digits *pixel;
  54   Int_t patch = fHoughTransformer->fPatch;
  55   Int_t slice = fHoughTransformer->fSlice;
  56   Int_t num_of_pads_to_look = 1;
  57   Int_t rows_to_miss = 2;
  58
  59   for(Int_t i=0; i<tracks->GetNTracks(); i++)
  60     {
  61       AliL3HoughTrack *track = (AliL3HoughTrack*)tracks->GetCheckedTrack(i);
  62       if(!track) {printf("No track\n"); return;}
  63
  64       Int_t nrow = 0;
  65
  66       for(Int_t padrow = NRows[patch][0]; padrow <= NRows[patch][1]; padrow++)
  67         {
  68
  69           Float_t xyz[3];
  70           //Get the crossing point of the track and current padrow:
  71           //if(!track->GetCrossingPoint(slice,padrow,xyz))
  72           if(!track->GetCrossingPoint(padrow,xyz))
  73             {
  74               printf("AliL3HoughEval::LookInsideRoad : Track does not cross line!!\n");
  75               continue;
  76             }
  77
  78           if(fake)
  79             fake->Fill(xyz[0],xyz[1],1);
  80           Int_t npixs = 0;
  81
  82           //Get the pixels along the track candidate
  83           for(pixel=(AliL3Digits*)fHoughTransformer->fRowContainer[padrow].first; pixel!=0; pixel=(AliL3Digits*)pixel->nextRowPixel)
  84             {
  85
  86               Int_t sector,row;
  87               Float_t xyz_pix[3];
  88               fTransform->Slice2Sector(slice,padrow,sector,row);
  89               fTransform->Raw2Local(xyz_pix,sector,row,pixel->fPad,pixel->fTime); //y alone pad
  90
  91
  92               //check if we are inside road
  93               if(fabs(xyz_pix[1] - xyz[1]) > num_of_pads_to_look*fTransform->GetPadPitchWidthLow()) continue;
  94               npixs++;
  95
  96               if(hist)
  97                 {
  98                   //fTransform->Local2Global(xyz_pix,slice);
  99                   hist->Fill(xyz_pix[0],xyz_pix[1],pixel->fCharge);
 100                 }
 101
 102             }
 103           if(npixs > 0)
 104             {
 105               nrow++;
 106             }
 107         }
 108
 109       if(nrow < NRows[patch][1]-NRows[patch][0]-rows_to_miss)
 110         tracks->Remove(i);
 111
 112     }
 113
 114   tracks->Compress();
 115
 116
 117 }
 118
 119 void AliL3HoughEval::DisplaySlice(TH2F *hist)
 120 {
 121
 122   AliL3Digits *pixel;
 123
 124   for(Int_t padrow = 0; padrow < 174; padrow++)
 125     {
 126
 127       for(pixel=(AliL3Digits*)fHoughTransformer->fRowContainer[padrow].first; pixel!=0; pixel=(AliL3Digits*)pixel->nextRowPixel)
 128         {
 129
 130           Int_t sector,row;
 131           Float_t xyz_pix[3];
 132           fTransform->Slice2Sector(fHoughTransformer->fSlice,padrow,sector,row);
 133           fTransform->Raw2Local(xyz_pix,sector,row,pixel->fPad,pixel->fTime); //y alone pad
 134
 135           if(hist)
 136             {
 137               hist->Fill(xyz_pix[0],xyz_pix[1],pixel->fCharge);
 138             }
 139
 140         }
 141     }
 142
 143 }
 144
 145
 146 void AliL3HoughEval::CompareMC(Char_t *rootfile,AliL3TrackArray *merged_tracks,Float_t *eta)
 147 {
 148
 149   Int_t slice = fSlice;
 150
 151   TFile *file = new TFile(rootfile);
 152   file->cd();
 153
 154   AliRun *gAlice = (AliRun*)file->Get("gAlice");
 155   gAlice->GetEvent(0);
 156
 157   TClonesArray *particles=gAlice->Particles();
 158   Int_t n=particles->GetEntriesFast();
 159   Float_t torad=TMath::Pi()/180;
 160   Float_t phi_min = slice*20 - 10;
 161   Float_t phi_max = slice*20 + 10;
 162
 163   for (Int_t j=0; j<n; j++) {
 164     TParticle *p=(TParticle*)particles->UncheckedAt(j);
 165     if (p->GetFirstMother()>=0) continue;  //secondary particle
 166     if(p->Eta() < eta[0] || p->Eta() > eta[1]) continue;
 167     Double_t ptg=p->Pt(),pxg=p->Px(),pyg=p->Py();//,pzg=p->Pz();
 168     Double_t phi_part = TMath::ATan2(pyg,pxg);
 169     if (phi_part < 0) phi_part += 2*TMath::Pi();
 170
 171     if(phi_part < phi_min*torad || phi_part > phi_max*torad) {continue;}
 172     if(ptg<0.100) continue;
 173
 174     AliL3HoughTrack *sel_track=0;
 175
 176     Double_t min_dist = 10000;
 177
 178     for(Int_t t=0; t<merged_tracks->GetNTracks(); t++)
 179       {
 180         AliL3HoughTrack *track = (AliL3HoughTrack*)merged_tracks->GetCheckedTrack(t);
 181         if(!track) {printf("AliL3HoughEval: NO TRACK\n"); continue;}
 182         Float_t phi0[2] = {track->GetPhi0(),0};
 183         fTransform->Local2GlobalAngle(phi0,slice);
 184         Double_t dPt = ptg - track->GetPt();
 185         Double_t dPhi0 = phi_part - phi0[0];
 186         Double_t distance = pow(dPt,2) + pow(dPhi0,2);
 187         if(distance < min_dist)
 188           {
 189             min_dist = distance;
 190             sel_track = track;
 191           }
 192
 193       }
 194     if(sel_track)
 195       sel_track->SetBestMCid(j,min_dist);
 196
 197     Double_t dpt = fabs(ptg-sel_track->GetPt());
 198     Double_t dphi0 = fabs(phi_part-sel_track->GetPhi0());
 199     //printf("Found match, min_dist %f dPt %f dPhi0 %f\n",min_dist,dpt,dphi0);
 200   }
 201   file->Close();
 202   delete file;
 203
 204
 205 }