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[u/mrichter/AliRoot.git] / T0 / AliT0Calibrator.cxx
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8d72d1c2 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#include <Riostream.h>
19
20#include "AliLog.h"
21#include "AliT0Parameters.h"
22#include "AliT0Calibrator.h"
23#include <TArrayI.h>
24#include <TGraph.h>
7d95281b 25#include <TH1F.h>
8d72d1c2 26
27ClassImp(AliT0Calibrator)
28
29//____________________________________________________________________
9e1b06a2 30 AliT0Calibrator::AliT0Calibrator():TNamed(),
8d72d1c2 31 fChannelWidth(0),
74adb36a 32 fWalk(0)
8d72d1c2 33{
34 AliT0Parameters* param = AliT0Parameters::Instance();
35 param->Init();
36
37 fChannelWidth = param->GetChannelWidth() ;
38
39 for (Int_t i=0; i<24; i++){
40 fTimeDelayCFD[i] = Int_t (param->GetTimeDelayCFD(i));
8d72d1c2 41 TGraph* fu = param ->GetWalk(i);
42 fWalk.AddAtAndExpand(fu,i);
74adb36a 43
8d72d1c2 44 }
45
46 //
47}
48//_____________________________________________________________________________
49
9e1b06a2 50AliT0Calibrator::AliT0Calibrator(const AliT0Calibrator &r): TNamed(),
8d72d1c2 51 fChannelWidth(0),
74adb36a 52 fWalk(0)
8d72d1c2 53
54{
55 //
56 // AliT0calibartor copy constructor
57 //
58
59 ((AliT0Calibrator &) r).Copy(*this);
60
61}
62
63//_____________________________________________________________________________
64AliT0Calibrator &AliT0Calibrator::operator=(const AliT0Calibrator &r)
65{
66 //
67 // Assignment operator
68 //
69
70 if (this != &r) ((AliT0Calibrator &) r).Copy(*this);
71 return *this;
72
73}
74
75
76
77//____________________________________________________________________
78Int_t AliT0Calibrator::WalkCorrection(Int_t ipmt, Int_t qt, Int_t time)
79{
80 //slewing correcion and equalizing channels
81
82 Int_t timeEq=0, timeWalk=0;
83 TGraph *fu1=(TGraph*) fWalk.At(ipmt);
84 Float_t walk=fu1->Eval(Float_t(qt));
85 TH1F*hr=fu1->GetHistogram();
86 Float_t maxValue=hr->GetMaximum(50);
9e1b06a2 87 timeWalk = time + Int_t((maxValue-walk)/fChannelWidth) ;
8d72d1c2 88
89 timeEq= timeWalk - (fTimeDelayCFD[ipmt]-fTimeDelayCFD[0]);
9e1b06a2 90 AliDebug(10,Form(" time before %i timeWalk %i , qt %i timeEq %i \n ",
74adb36a 91 time,timeWalk, qt, timeEq ));
8d72d1c2 92 return timeEq;
93}
94
95
96