New task to check TPC-ITS track prolongation eff with cosmics

[u/mrichter/AliRoot.git] / ITS / AliITSDriftSpeedSDD.cxx

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 * Copyright(c) 2007-2009, ALICE Experiment at CERN, All rights reserved. *
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 * Author: The ALICE Off-line Project.                                    *
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 * about the suitability of this software for any purpose. It is          *
 * provided "as is" without express or implied warranty.                  *
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/* $Id$ */

///////////////////////////////////////////////////////////////////
//                                                               //
// Implementation of the class for SDD drift speed               //
// Origin: F.Prino, Torino, prino@to.infn.it                     //
//                                                               //
///////////////////////////////////////////////////////////////////

#include "AliITSDriftSpeedSDD.h"
#include "AliLog.h"

const Float_t AliITSDriftSpeedSDD::fgkDriftSpeedDefault = 7.3;

ClassImp(AliITSDriftSpeedSDD)
//______________________________________________________________________
AliITSDriftSpeedSDD::AliITSDriftSpeedSDD():
TObject(),
fEvNum(0),
fTimestamp(0),
fPolDeg(0){
  // default constructor
  fDriftSpeedParam[0]=fgkDriftSpeedDefault;
  for(Int_t i=1; i<fgkMaxPolDeg+1; i++) fDriftSpeedParam[i]=0;
}
//______________________________________________________________________
AliITSDriftSpeedSDD::AliITSDriftSpeedSDD(Int_t ev, UInt_t timest, Int_t deg, Double_t *coeff):
TObject(),
fEvNum(ev),
fTimestamp(timest),
fPolDeg(deg){
  // standard constructor
  if(deg>fgkMaxPolDeg){
    fPolDeg=fgkMaxPolDeg;
    AliWarning(Form("Polynomial degree must be <%d. Drift speed parametrization limited to %dth degree poly.\n",fgkMaxPolDeg,fgkMaxPolDeg));
  }
  for(Int_t i=0; i<fPolDeg+1; i++) fDriftSpeedParam[i]=coeff[i];
  for(Int_t i=fPolDeg+1; i<fgkMaxPolDeg+1; i++) fDriftSpeedParam[i]=0;
}
//______________________________________________________________________
AliITSDriftSpeedSDD::AliITSDriftSpeedSDD(const AliITSDriftSpeedSDD& drSpeed):
TObject(),
fEvNum(drSpeed.fEvNum),
fTimestamp(drSpeed.fTimestamp),
fPolDeg(drSpeed.fPolDeg)
{
  // copy constructor
  for(Int_t i=0; i<fgkMaxPolDeg+1; i++) fDriftSpeedParam[i]=drSpeed.GetDriftSpeedParameter(i);
  
}
//______________________________________________________________________
void AliITSDriftSpeedSDD::PrintDriftSpeedParameters() const {
  // printout drift speed parametrization
  printf("Injector event #%d at time %d\n",fEvNum,fTimestamp);
  printf("Coefficients of %d degree poly fit:\n",fPolDeg);
  for(Int_t i=0; i<fgkMaxPolDeg+1; i++) printf("par[%d]=%G\n",i,fDriftSpeedParam[i]);
}