ITS/AliITSMapSDD.cxx

   1 /**************************************************************************
   2  * Copyright(c) 2007-2009, 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 // Implementation of the base class for SDD map corrections      //
  21 // Origin: F.Prino, Torino, prino@to.infn.it                     //
  22 //                                                               //
  23 ///////////////////////////////////////////////////////////////////
  24
  25 #include "TH1F.h"
  26 #include "TH2F.h"
  27 #include "AliITSMapSDD.h"
  28
  29 ClassImp(AliITSMapSDD)
  30 //______________________________________________________________________
  31 AliITSMapSDD::AliITSMapSDD():TNamed("defaultmap","")
  32 {
  33   // default constructor
  34   for(Int_t iAn=0;iAn<fgkNAnodPts; iAn++){
  35     for(Int_t iDr=0;iDr<fgkNDrifPts; iDr++){
  36       fMap[iAn][iDr]=0;
  37     }
  38   }
  39 }
  40 //______________________________________________________________________
  41 AliITSMapSDD::AliITSMapSDD(Char_t *mapname):TNamed(mapname,"")
  42 {
  43   // standard constructor
  44   for(Int_t iAn=0;iAn<fgkNAnodPts; iAn++){
  45     for(Int_t iDr=0;iDr<fgkNDrifPts; iDr++){
  46       fMap[iAn][iDr]=0;
  47     }
  48   }
  49 }
  50
  51 //______________________________________________________________________
  52 void AliITSMapSDD::SetMap(TH2F* hmap){
  53   // Fill map staring from 2D histo
  54   // with anodes on x axis and drift dist. on y axis
  55   for(Int_t iAn=0;iAn<fgkNAnodPts; iAn++){
  56     for(Int_t iDr=0;iDr<fgkNDrifPts; iDr++){
  57       fMap[iAn][iDr]=hmap->GetBinContent(iAn+1,iDr+1);
  58     }
  59   }
  60 }
  61 //______________________________________________________________________
  62 Float_t AliITSMapSDD::GetCorrection(Float_t z, Float_t x, AliITSsegmentationSDD *seg){
  63   // returns correction in cm starting from local coordinates on the module
  64   const Double_t kMicronTocm = 1.0e-4;
  65   Int_t nAnodes=seg->Npz();
  66   Int_t nAnodesHybrid=seg->NpzHalf();
  67   Int_t bina =(Int_t) seg->GetAnodeFromLocal(x,z);
  68   if(bina>nAnodes)  AliError("Wrong anode anumber!");
  69   if(bina>=nAnodesHybrid) bina-=nAnodesHybrid;
  70   Float_t stept = seg->Dx()*kMicronTocm/(Float_t)fgkNDrifPts;
  71   Int_t bint = TMath::Abs((Int_t)(x/stept));
  72   if(bint==fgkNDrifPts) bint-=1;
  73   if(bint>=fgkNDrifPts) AliError("Wrong bin number along drift direction!");
  74   return kMicronTocm*GetCellContent(bina,bint);
  75 }
  76 //______________________________________________________________________
  77 TH2F* AliITSMapSDD::GetMapHisto() const{
  78   // Returns a TH2F histogram with map of residuals
  79   Char_t hname[50];
  80   sprintf(hname,"h%s",GetName());
  81   TH2F* hmap=new TH2F(hname,"",fgkNAnodPts,-0.5,255.5,fgkNDrifPts,0.,35.);
  82   for(Int_t iAn=0;iAn<fgkNAnodPts; iAn++){
  83     for(Int_t iDr=0;iDr<fgkNDrifPts; iDr++){
  84       hmap->SetBinContent(iAn+1,iDr+1,fMap[iAn][iDr]);
  85     }
  86   }
  87   return hmap;
  88 }
  89 //______________________________________________________________________
  90 TH1F* AliITSMapSDD::GetResidualDistr(Float_t dmin, Float_t dmax) const{
  91   // Returns a TH1F histogram with distribution of residual
  92   Char_t hname[50];
  93   sprintf(hname,"hd%s",GetName());
  94   TH1F* hd=new TH1F(hname,"",100,dmin,dmax);
  95   for(Int_t iAn=0;iAn<fgkNAnodPts; iAn++){
  96     for(Int_t iDr=0;iDr<fgkNDrifPts; iDr++){
  97       hd->Fill(fMap[iAn][iDr]);
  98     }
  99   }
 100   return hd;
 101 }