Adding a reminder for coders
[u/mrichter/AliRoot.git] / EMCAL / AliCaloRawAnalyzerFastFit.cxx
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168c7b3c 1// -*- mode: c++ -*-
e37e3c84 2/**************************************************************************
3 * This file is property of and copyright by the Experimental Nuclear *
4 * Physics Group, Dep. of Physics *
5 * University of Oslo, Norway, 2007 *
6 * *
7 * Author: Per Thomas Hille <perthi@fys.uio.no> for the ALICE HLT Project.*
8 * Contributors are mentioned in the code where appropriate. *
9 * Please report bugs to perthi@fys.uio.no *
10 * *
11 * Permission to use, copy, modify and distribute this software and its *
12 * documentation strictly for non-commercial purposes is hereby granted *
13 * without fee, provided that the above copyright notice appears in all *
14 * copies and that both the copyright notice and this permission notice *
15 * appear in the supporting documentation. The authors make no claims *
16 * about the suitability of this software for any purpose. It is *
17 * provided "as is" without express or implied warranty. *
18 **************************************************************************/
19
20
21// Extraction of Amplitude and peak
22// position using specila algorithm
23// from Alexei Pavlinov
24// ----------------
25// ----------------
26
27#include "AliCaloRawAnalyzerFastFit.h"
28#include "AliCaloFastAltroFitv0.h"
29#include "AliCaloFitResults.h"
30#include "AliCaloBunchInfo.h"
f57baa2d 31#include "TMath.h"
e37e3c84 32#include <iostream>
33
34using namespace std;
168c7b3c 35#include "AliCaloConstants.h"
168c7b3c 36
e37e3c84 37ClassImp( AliCaloRawAnalyzerFastFit )
38
40bd46e7 39
40AliCaloRawAnalyzerFastFit::AliCaloRawAnalyzerFastFit() : AliCaloRawAnalyzerFitter("Fast Fit (Alexei)", "FF")
e37e3c84 41{
42 // Comment
168c7b3c 43 fAlgo= Algo::kFastFit;
e37e3c84 44}
45
40bd46e7 46
e37e3c84 47AliCaloRawAnalyzerFastFit::~AliCaloRawAnalyzerFastFit()
48{
49
50}
51
52
53AliCaloFitResults
54AliCaloRawAnalyzerFastFit::Evaluate( const vector<AliCaloBunchInfo> &bunchvector,
55 const UInt_t altrocfg1, const UInt_t altrocfg2 )
56{
57 // Comment
58
59 short maxampindex; //index of maximum amplitude
60 short maxamp; //Maximum amplitude
61 int index = SelectBunch( bunchvector, &maxampindex, &maxamp );
62
63 if( index >= 0)
64 {
65 Float_t ped = ReverseAndSubtractPed( &(bunchvector.at(index)) , altrocfg1, altrocfg2, fReversed );
f57baa2d 66 Float_t maxf = TMath::MaxElement( bunchvector.at(index).GetLength(), fReversed );
3b8fd9fe 67 short timebinOffset = maxampindex - (bunchvector.at(index).GetLength()-1);
2cd0ffda 68
69 if( maxf < fAmpCut || ( maxamp - ped) > fOverflowCut ) // (maxamp - ped) > fOverflowCut = Close to saturation (use low gain then)
70 {
168c7b3c 71 return AliCaloFitResults( maxamp, ped, Algo::kCrude, maxf, timebinOffset);
2cd0ffda 72 }
73 else if ( maxf >= fAmpCut ) // no if statement needed really; keep for readability
e37e3c84 74 {
2cd0ffda 75 int first = 0;
76 int last = 0;
77 int maxrev = maxampindex - bunchvector.at(index).GetStartBin();
78
92d9f317 79 SelectSubarray( fReversed, bunchvector.at(index).GetLength(), maxrev , &first, &last, fFitArrayCut);
80
3b8fd9fe 81 int nsamples = last - first + 1;
e37e3c84 82
e37e3c84 83 if( ( nsamples ) >= fNsampleCut )
84 {
85 Double_t ordered[1008];
86
e211d601 87 for(int i=0; i < nsamples ; i++ )
88 {
89 ordered[i] = fReversed[first + i];
90 }
e37e3c84 91
92 Double_t eSignal = 1; // nominal 1 ADC error
93 Double_t dAmp = maxf;
94 Double_t eAmp = 0;
507751ce 95 Double_t dTime0 = 0;
e37e3c84 96 Double_t eTime = 0;
97 Double_t chi2 = 0;
e211d601 98 Double_t dTau = 2.35; // time-bin units
e37e3c84 99
40bd46e7 100 AliCaloFastAltroFitv0::FastFit(fXaxis, ordered , nsamples,
507751ce 101 eSignal, dTau, dAmp, eAmp, dTime0, eTime, chi2);
e37e3c84 102
507751ce 103 Double_t dTimeMax = dTime0 + timebinOffset - (maxrev - first) // abs. t0
104 + dTau; // +tau, makes sum tmax
168c7b3c 105 return AliCaloFitResults(maxamp, ped, Ret::kFitPar, dAmp, dTimeMax, timebinOffset, chi2, Ret::kDummy,
106 Ret::kDummy, AliCaloFitSubarray(index, maxrev, first, last) );
f57baa2d 107 } // samplecut
108 else
109 {
2cd0ffda 110 Float_t chi2 = CalculateChi2(maxf, maxrev, first, last);
111 Int_t ndf = last - first - 1; // nsamples - 2
168c7b3c 112 return AliCaloFitResults( maxamp, ped, Ret::kCrude, maxf, timebinOffset,
113 timebinOffset, chi2, ndf, Ret::kDummy, AliCaloFitSubarray(index, maxrev, first, last) );
e37e3c84 114 }
f57baa2d 115 } // ampcut
f57baa2d 116 } // bunch index
117
168c7b3c 118 return AliCaloFitResults( Ret::kInvalid , Ret::kInvalid );
e37e3c84 119}