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70da6c5a | 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 | // Toolkit containing various usefull things | |
17 | // Usable everywhere in the hfe software package | |
18 | // For more information see the cxx file | |
19 | // | |
20 | // Authors | |
21 | // All authors of the HFE group | |
22 | // | |
23 | #include <TMath.h> | |
24 | #include <TParticle.h> | |
25 | #include "TH1.h" | |
26 | #include "TH2.h" | |
27 | #include "THnSparse.h" | |
28 | #include "TAxis.h" | |
29 | ||
30 | #include "AliAODMCParticle.h" | |
3a72645a | 31 | #include "AliAODpidUtil.h" |
faee3b18 | 32 | #include "AliESDpid.h" |
70da6c5a | 33 | #include "AliLog.h" |
3a72645a | 34 | #include "AliTPCPIDResponse.h" |
faee3b18 | 35 | #include "AliTOFPIDResponse.h" |
70da6c5a | 36 | |
37 | #include "AliHFEtools.h" | |
38 | ||
39 | ClassImp(AliHFEtools) | |
40 | ||
8c1c76e9 | 41 | AliPIDResponse *AliHFEtools::fgDefaultPID = NULL; |
69ac0e6f | 42 | Int_t AliHFEtools::fgLogLevel = 0; |
faee3b18 | 43 | |
70da6c5a | 44 | //__________________________________________ |
45 | AliHFEtools::AliHFEtools(): | |
46 | TObject() | |
47 | { | |
48 | } | |
49 | ||
50 | //__________________________________________ | |
51 | Double_t *AliHFEtools::MakeLinearBinning(Int_t nBins, Double_t ymin, Double_t ymax){ | |
52 | // | |
53 | // Helper function for linearly binned array | |
54 | // | |
55 | Double_t *bins = new Double_t[nBins + 1]; | |
56 | Double_t stepsize = (ymax - ymin) / static_cast<Double_t>(nBins); | |
57 | bins[0] = ymin; | |
58 | for(Int_t ibin = 1; ibin <= nBins; ibin++) | |
59 | bins[ibin] = bins[ibin-1] + stepsize; | |
60 | return bins; | |
61 | } | |
62 | ||
63 | //__________________________________________ | |
64 | Double_t *AliHFEtools::MakeLogarithmicBinning(Int_t nBins, Double_t ymin, Double_t ymax){ | |
65 | // | |
66 | // Helper function for logartimically binned array | |
67 | // | |
68 | Double_t *bins = new Double_t[nBins+1]; | |
69 | bins[0] = ymin; | |
70 | Double_t factor = TMath::Power(ymax/ymin, 1./nBins); | |
71 | for(Int_t ibin = 1; ibin <= nBins; ibin++){ | |
72 | bins[ibin] = factor * bins[ibin-1]; | |
73 | } | |
74 | return bins; | |
75 | } | |
76 | ||
77 | //_________________________________________ | |
78 | Bool_t AliHFEtools::BinLogAxis(TObject *o, Int_t dim){ | |
79 | ||
80 | // | |
81 | // converts the axis (defined by the dimension) of THx or THnSparse | |
82 | // object to Log scale. Number of bins and bin min and bin max are preserved | |
83 | // | |
84 | ||
85 | ||
86 | if(!o){ | |
87 | AliError("Input histogram is null pointer"); | |
88 | return kFALSE; | |
89 | } | |
90 | ||
91 | TAxis *axis = 0x0; | |
92 | if(o->InheritsFrom("TH1")){ | |
bf892a6a | 93 | TH1 *h1 = dynamic_cast<TH1F*>(o); |
94 | if(h1) axis = h1->GetXaxis(); | |
70da6c5a | 95 | } |
96 | else if(o->InheritsFrom("TH2")){ | |
bf892a6a | 97 | TH2 *h2 = dynamic_cast<TH2F*>(o); |
98 | if(h2 && 0 == dim){ | |
99 | axis = h2->GetXaxis(); | |
70da6c5a | 100 | } |
bf892a6a | 101 | else if(h2 && 1 == dim){ |
102 | axis = h2->GetYaxis(); | |
70da6c5a | 103 | } |
104 | else{ | |
105 | AliError("Only dim = 0 or 1 possible for TH2F"); | |
106 | } | |
107 | } | |
108 | else if(o->InheritsFrom("THnSparse")){ | |
bf892a6a | 109 | THnSparse *hs = dynamic_cast<THnSparse*>(o); |
110 | if(hs) axis = hs->GetAxis(dim); | |
70da6c5a | 111 | } |
112 | else{ | |
113 | AliError("Type of input object not recognized, please check your code or update this finction"); | |
114 | return kFALSE; | |
115 | } | |
116 | if(!axis){ | |
117 | AliError(Form("Axis '%d' could not be identified in the object \n", dim)); | |
118 | return kFALSE; | |
119 | } | |
120 | ||
121 | Int_t bins = axis->GetNbins(); | |
122 | ||
123 | Double_t from = axis->GetXmin(); | |
124 | if(from <= 0){ | |
125 | AliError(Form("Log binning not possible for this axis [min = %f]\n", from)); | |
126 | } | |
127 | Double_t to = axis->GetXmax(); | |
128 | Double_t *newBins = new Double_t[bins+1]; | |
129 | newBins[0] = from; | |
130 | Double_t factor = TMath::Power(to/from, 1./bins); | |
131 | for(Int_t i=1; i<=bins; ++i){ | |
132 | newBins[i] = factor * newBins[i-1]; | |
133 | } | |
134 | axis->Set(bins, newBins); | |
bf892a6a | 135 | delete[] newBins; |
70da6c5a | 136 | |
137 | return kTRUE; | |
138 | } | |
139 | ||
140 | //__________________________________________ | |
3a72645a | 141 | Float_t AliHFEtools::GetRapidity(const TParticle *part){ |
70da6c5a | 142 | // |
143 | // return rapidity | |
144 | // | |
145 | Float_t rapidity; | |
146 | if(!((part->Energy() - part->Pz())*(part->Energy() + part->Pz())>0)) rapidity=-999; | |
147 | else rapidity = 0.5*(TMath::Log((part->Energy()+part->Pz()) / (part->Energy()-part->Pz()))); | |
148 | return rapidity; | |
149 | } | |
150 | ||
151 | //__________________________________________ | |
3a72645a | 152 | Float_t AliHFEtools::GetRapidity(const AliAODMCParticle *part){ |
70da6c5a | 153 | // return rapidity |
154 | ||
155 | Float_t rapidity; | |
156 | if(!((part->E() - part->Pz())*(part->E() + part->Pz())>0)) rapidity=-999; | |
157 | else rapidity = 0.5*(TMath::Log((part->E()+part->Pz()) / (part->E()-part->Pz()))); | |
158 | return rapidity; | |
159 | } | |
160 | ||
faee3b18 | 161 | //__________________________________________ |
8c1c76e9 | 162 | AliPIDResponse* AliHFEtools::GetDefaultPID(Bool_t isMC, Bool_t isESD){ |
faee3b18 | 163 | // |
164 | // Get the default PID as singleton instance | |
165 | // | |
166 | if(!fgDefaultPID){ | |
8c1c76e9 | 167 | |
168 | if(isESD) fgDefaultPID = new AliESDpid; | |
169 | else fgDefaultPID = new AliAODpidUtil; | |
faee3b18 | 170 | Double_t tres = isMC ? 80. : 130.; |
171 | fgDefaultPID->GetTOFResponse().SetTimeResolution(tres); | |
172 | ||
173 | // TPC Bethe Bloch parameters | |
174 | Double_t alephParameters[5]; | |
175 | if(isMC){ | |
176 | // simulation | |
177 | alephParameters[0] = 2.15898e+00/50.; | |
178 | alephParameters[1] = 1.75295e+01; | |
179 | alephParameters[2] = 3.40030e-09; | |
180 | alephParameters[3] = 1.96178e+00; | |
181 | alephParameters[4] = 3.91720e+00; | |
182 | } else { | |
183 | alephParameters[0] = 0.0283086/0.97; | |
184 | //alephParameters[0] = 0.0283086; | |
185 | alephParameters[1] = 2.63394e+01; | |
186 | alephParameters[2] = 5.04114e-11; | |
187 | alephParameters[3] = 2.12543e+00; | |
188 | alephParameters[4] = 4.88663e+00; | |
189 | } | |
190 | fgDefaultPID->GetTPCResponse().SetBetheBlochParameters(alephParameters[0],alephParameters[1],alephParameters[2], alephParameters[3],alephParameters[4]); | |
67fe7bd0 | 191 | fgDefaultPID->GetTPCResponse().SetSigma(3.79301e-03, 2.21280e+04); |
faee3b18 | 192 | |
193 | } | |
194 | if(fgLogLevel){ | |
67fe7bd0 | 195 | printf("Error - You are using the default PID: You should use the PID coming from the tender\n"); |
196 | printf("Error - Arrrrrrrrr...\n"); | |
197 | printf("Error - Please rethink your program logic. Using default PID is really dangerous\n"); | |
198 | printf("Error - TOF PID is adapted to Monte Carlo\n"); | |
faee3b18 | 199 | } |
200 | return fgDefaultPID; | |
201 | } | |
202 | ||
3a72645a | 203 | |
faee3b18 | 204 | //__________________________________________ |
205 | void AliHFEtools::DestroyDefaultPID(){ | |
206 | // | |
207 | // Destroy default PID object if existing | |
208 | // | |
209 | if(fgDefaultPID) delete fgDefaultPID; | |
210 | fgDefaultPID = NULL; | |
3a72645a | 211 | } |
212 | ||
213 | //__________________________________________ | |
214 | Int_t AliHFEtools::GetPdg(const AliVParticle *track){ | |
215 | // | |
216 | // Get MC PDG code (only MC particles supported) | |
217 | // | |
218 | Int_t pdg = 0; | |
219 | if(!TString(track->IsA()->GetName()).CompareTo("AliMCParticle")){ | |
220 | const AliMCParticle *mctrack = dynamic_cast<const AliMCParticle *>(track); | |
e3ae862b | 221 | pdg = mctrack ? mctrack->Particle()->GetPdgCode() : 0; |
3a72645a | 222 | } else if(!TString(track->IsA()->GetName()).CompareTo("AliAODMCParticle")){ |
223 | const AliAODMCParticle *aodmctrack = dynamic_cast<const AliAODMCParticle *>(track); | |
e3ae862b | 224 | pdg = aodmctrack ? aodmctrack->GetPdgCode() : 0; |
3a72645a | 225 | } |
226 | return pdg; | |
227 | } | |
228 | ||
229 | //__________________________________________ | |
230 | Int_t AliHFEtools::PDG2AliPID(Int_t pdg){ | |
231 | // | |
232 | // Helper function to convert MC PID codes into AliPID codes | |
233 | // | |
234 | Int_t pid = -1; | |
235 | switch(TMath::Abs(pdg)){ | |
236 | case 11: pid = AliPID::kElectron; break; | |
237 | case 13: pid = AliPID::kMuon; break; | |
238 | case 211: pid = AliPID::kPion; break; | |
239 | case 321: pid = AliPID::kKaon; break; | |
240 | case 2212: pid = AliPID::kProton; break; | |
241 | default: pid = -1; break; | |
242 | }; | |
243 | return pid; | |
faee3b18 | 244 | } |