Fix to the updated interface of the vertexer (Thanks Annalisa for spotting it).
[u/mrichter/AliRoot.git] / PHOS / AliPHOSRecCpvManager.cxx
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cbd576a6 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
090026bf 16/* $Id$ */
cbd576a6 17
386aef34 18//_________________________________________________________________________
cbd576a6 19// Class for the management by the CPV reconstruction.
386aef34 20////
cbd576a6 21//*-- Author : Boris Polichtchouk (IHEP, Protvino) 6 Mar 2001
22//
23// --- ROOT system ---
24
090026bf 25#include <TMath.h>
26
cbd576a6 27// --- Standard library ---
28
cbd576a6 29// --- AliRoot header files ---
30
31#include "AliPHOSRecCpvManager.h"
e957fea8 32#include "AliPHOSGeometry.h"
cbd576a6 33
34ClassImp(AliPHOSRecCpvManager)
35
36//____________________________________________________________________________
3f7dbdb7 37AliPHOSRecCpvManager::AliPHOSRecCpvManager() :
38 fOneGamChisqCut(3.),
39 fOneGamInitialStep(0.00005),
40 fOneGamChisqMin(1.),
41 fOneGamStepMin(0.0005),
42 fOneGamNumOfIterations(50),
43 fTwoGamInitialStep(0.00005),
44 fTwoGamChisqMin(1.),
45 fTwoGamEmin(0.1),
46 fTwoGamStepMin(0.00005),
47 fTwoGamNumOfIterations(50),
48 fThr0(0.),
49 fSqdCut(0.)
cbd576a6 50{
133fff9a 51 // Put a comment here
cbd576a6 52 SetTitle("Cpv Reconstruction Manager");
53}
54
133fff9a 55AliPHOSRecCpvManager::~AliPHOSRecCpvManager(void)
56{
57 // Put a comment here
58}
cbd576a6 59
90cceaf6 60Float_t AliPHOSRecCpvManager::Dispersion(Float_t etot, Float_t ai) const
cbd576a6 61{
62 //"Dispresion" of energy deposition in the cell.
133fff9a 63 // etot is the total shower energy, ai is the
cbd576a6 64 // calculated cell response,
133fff9a 65 // ei is the measured cell response.
cbd576a6 66
133fff9a 67 const Float_t kConst = 1.5;
68 return kConst*ai*(1.-ai/etot);
cbd576a6 69}
70
386aef34 71Float_t AliPHOSRecCpvManager::OneGamChi2(Float_t ai, Float_t ei, Float_t etot, Float_t& Gi) const
cbd576a6 72{
73 //"Chi2" for one cell.
133fff9a 74 // etot is the total "shower" energy, ai is the
cbd576a6 75 // calculated cell response,
133fff9a 76 // ei is the measured cell response.
cbd576a6 77
133fff9a 78 const Float_t kConst = 1.5;
cbd576a6 79
133fff9a 80 Float_t da = ai - ei;
81 Float_t d = kConst*ai*(1.-ai/etot);
cbd576a6 82
133fff9a 83 Float_t dd = da/d;
84 Gi = dd*(2.- dd*kConst*(1.-2.*ai/etot));
cbd576a6 85
133fff9a 86 Info("OneGamChi2", " OneGamChi2 (ai,ei,etot,&Gi,chi2) %f %f %f %f %f", ai, ei, etot, Gi, da*da/d );
cbd576a6 87
133fff9a 88 return da*da/d;
cbd576a6 89
90}
91
133fff9a 92Float_t AliPHOSRecCpvManager::TwoGamChi2(Float_t ai, Float_t ei, Float_t etot, Float_t& gi) const
cbd576a6 93{
133fff9a 94 // Put a comment here
cbd576a6 95
133fff9a 96 const Float_t kConst = 1.5;
cbd576a6 97
133fff9a 98 Float_t da = ai - ei;
99 Float_t d = kConst*ai*(1.-ai/etot);
cbd576a6 100
133fff9a 101 Float_t dd = da/d;
102 gi = dd*(2.- dd*kConst*(1.-2.*ai/etot));
cbd576a6 103
133fff9a 104 return da*da/d;
cbd576a6 105
106}
107
133fff9a 108void AliPHOSRecCpvManager::AG(Float_t ei, Float_t xi, Float_t yi, Float_t& ai, Float_t& gxi, Float_t& gyi )
cbd576a6 109{
133fff9a 110 //Calculates amplitude (ai) and gradients (gxi, gyi) of CPV pad response.
111 //Integrated response (total "shower energy") is e,
112 //xi and yi are the distances along x and y from reference point
cbd576a6 113 // to the pad center.
114
6c8cd883 115 AliPHOSGeometry * geom = AliPHOSGeometry::GetInstance() ;
88cb7938 116
133fff9a 117 Float_t celZ = geom->GetPadSizeZ();
118 Float_t celY = geom->GetPadSizePhi();
cbd576a6 119
133fff9a 120// // Info("AG", "celZ: %f celY: %f", celZ, celY) ;
cbd576a6 121
133fff9a 122 Float_t dx = celZ/2.;
123 Float_t dy = celY/2.;
cbd576a6 124
133fff9a 125// // Float_t x = xi*celZ;
126// // Float_t y = yi*celZ;
cbd576a6 127
133fff9a 128 Float_t x = xi*celZ;
129 Float_t y = yi*celY;
cbd576a6 130
133fff9a 131 Float_t e = ei;
cbd576a6 132
133fff9a 133 Float_t a = Fcml(x+dx,y+dy) - Fcml(x+dx,y-dy) - Fcml(x-dx,y+dy) + Fcml(x-dx,y-dy);
134 ai = a*e;
cbd576a6 135
136
133fff9a 137 Float_t gx = GradX(x+dx,y+dy) - GradX(x+dx,y-dy) - GradX(x-dx,y+dy) + GradX(x-dx,y-dy);
138 gxi = gx*e*e;
cbd576a6 139
133fff9a 140 Float_t gy = GradY(x+dx,y+dy) - GradY(x+dx,y-dy) - GradY(x-dx,y+dy) + GradY(x-dx,y-dy);
141 gyi = gy*e*e;
cbd576a6 142
143}
144
145Float_t AliPHOSRecCpvManager::Fcml(Float_t x, Float_t y)
146{
147 //Cumulative function
148
133fff9a 149 const Float_t ka = 1.0;
150 const Float_t kb = 0.70;
cbd576a6 151
133fff9a 152 Float_t fff = TMath::ATan(x*y/( kb*TMath::Sqrt( (kb*kb) + x*x+y*y)))
153 - TMath::ATan(x*y/(3*kb*TMath::Sqrt((3*kb)*(3*kb) + x*x+y*y)))
154 + TMath::ATan(x*y/(5*kb*TMath::Sqrt((5*kb)*(5*kb) + x*x+y*y)))
155 - TMath::ATan(x*y/(7*kb*TMath::Sqrt((7*kb)*(7*kb) + x*x+y*y)))
156 + TMath::ATan(x*y/(9*kb*TMath::Sqrt((9*kb)*(9*kb) + x*x+y*y)));
cbd576a6 157
386aef34 158 Float_t fcml = ka*fff/TMath::TwoPi();
133fff9a 159// Info("Fcml", "fcml: %f", fcml) ;
160 return fcml;
cbd576a6 161
162}
163
164
165Float_t AliPHOSRecCpvManager::GradX(Float_t x, Float_t y)
166{
133fff9a 167 // Put a comment here
cbd576a6 168
133fff9a 169 const Float_t ka = 1.0;
170 const Float_t kb = 0.70;
cbd576a6 171
133fff9a 172 Float_t skv = kb*kb + x*x + y*y;
cbd576a6 173
133fff9a 174 Float_t gradient = y*(1.-x*x/skv)* kb*TMath::Sqrt(skv)/( kb*kb*skv+x*x*y*y)
175 - y*(1.-x*x/skv)*3*kb*TMath::Sqrt(skv)/((3*kb)*(3*kb)*skv+x*x*y*y)
176 + y*(1.-x*x/skv)*5*kb*TMath::Sqrt(skv)/((5*kb)*(5*kb)*skv+x*x*y*y)
177 - y*(1.-x*x/skv)*7*kb*TMath::Sqrt(skv)/((7*kb)*(7*kb)*skv+x*x*y*y)
178 + y*(1.-x*x/skv)*9*kb*TMath::Sqrt(skv)/((9*kb)*(9*kb)*skv+x*x*y*y);
cbd576a6 179
386aef34 180 Float_t grad = ka*gradient/TMath::TwoPi();
133fff9a 181 return grad;
cbd576a6 182}
183
184
185Float_t AliPHOSRecCpvManager::GradY(Float_t x, Float_t y)
186{
133fff9a 187 // Put a comment here
cbd576a6 188
386aef34 189 const Float_t ka = 1.0;
133fff9a 190 const Float_t kb = 0.70;
cbd576a6 191
133fff9a 192 Float_t skv = kb*kb + x*x + y*y;
193 Float_t gradient = x*(1.-y*y/skv)* kb*TMath::Sqrt(skv)/( kb*kb*skv+x*x*y*y)
194 - x*(1.-y*y/skv)*3*kb*TMath::Sqrt(skv)/((3*kb)*(3*kb)*skv+x*x*y*y)
195 + x*(1.-y*y/skv)*5*kb*TMath::Sqrt(skv)/((5*kb)*(5*kb)*skv+x*x*y*y)
196 - x*(1.-y*y/skv)*7*kb*TMath::Sqrt(skv)/((7*kb)*(7*kb)*skv+x*x*y*y)
197 + x*(1.-y*y/skv)*9*kb*TMath::Sqrt(skv)/((9*kb)*(9*kb)*skv+x*x*y*y);
cbd576a6 198
386aef34 199 Float_t grad = ka*gradient/TMath::TwoPi();
133fff9a 200 return grad;
cbd576a6 201}
202
203