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5240525e | 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 | //_________________________________________________________________________ | |
17 | // Class to calculate jet chararacteristics | |
18 | // | |
19 | //*-- Author : D.Peressounko | |
20 | ////////////////////////////////////////////////////////////////////////////// | |
21 | ||
22 | // --- ROOT system --- | |
23 | #include "TParticle.h" | |
24 | ||
25 | // --- Standard library --- | |
26 | ||
27 | // --- AliRoot header files --- | |
28 | #include "AliPHOSJet.h" | |
29 | // #include "AliPHOSGetter.h" | |
30 | ||
31 | ClassImp(AliPHOSJet) | |
32 | ||
33 | //____________________________________________________________________________ | |
34 | AliPHOSJet::AliPHOSJet():TObject() { | |
35 | fNpart = 0 ; | |
36 | fList = 0 ; | |
37 | // fMode = 0 ; | |
38 | fConeRad = 0 ; | |
39 | fMaxConeMove = 0 ; | |
40 | fMinConeMove = 0 ; | |
41 | ||
42 | fSumEnergy = 0 ; | |
43 | fSumEta = 0 ; | |
44 | fSumPhi = 0 ; | |
45 | fEnergy = 0 ; | |
46 | fEta = 0 ; | |
47 | fPhi = 0 ; | |
48 | fLEnergy = 0 ; | |
49 | fLEta = 0 ; | |
50 | fLPhi = 0 ; | |
51 | } | |
52 | ||
53 | //____________________________________________________________________________ | |
54 | AliPHOSJet::~AliPHOSJet(){ | |
55 | if(fList){ | |
56 | delete fList ; | |
57 | fList = 0 ; | |
58 | } | |
59 | ||
60 | } | |
61 | //____________________________________________________________________________ | |
62 | void AliPHOSJet::AddParticle(const TParticle * p,const Int_t index){ | |
63 | //adds particle to jet. Calculates change in jet direction, | |
64 | //due to addition of this particle and if it is smaller, than fMaxDev, | |
65 | //add particle, axcept new direction and return true. | |
66 | ||
67 | fSumEnergy+=p->Energy() ; | |
68 | if(p->Pt()/p->Energy() > 0.001) | |
69 | fSumEta+=p->Eta()*p->Energy() ; | |
70 | else | |
71 | fSumEta+=100.*p->Pz() ; | |
72 | fSumPhi+=p->Phi()*p->Energy() ; | |
73 | ||
74 | //check if this a leading particle? | |
75 | if(fLEnergy < p->Energy()){ | |
76 | fLEnergy = p->Energy() ; | |
77 | if(p->Pt()/p->Energy() > 0.001) | |
78 | fLEta = p->Eta() ; | |
79 | else | |
80 | fLEta = 100.*p->Pz()/p->Energy() ; | |
81 | fLPhi = p->Phi() ; | |
82 | } | |
83 | ||
84 | if(index >=0){ //add index to list of indexes | |
85 | if(!fList){ | |
86 | fList = new TArrayI(100) ; | |
87 | } | |
88 | if(fList->GetSize()<=fNpart+1){ | |
89 | TArrayI * tmp = new TArrayI(fNpart*2) ; | |
90 | tmp->Adopt(fList->GetSize(),fList->GetArray()) ; //note, we should not delete old array! | |
91 | fList=tmp ; | |
92 | } | |
93 | fList->AddAt(index,fNpart++) ; | |
94 | } | |
95 | } | |
96 | //____________________________________________________________________________ | |
97 | void AliPHOSJet::AddDigit(const Double_t e,const Double_t eta,const Double_t phi, const Int_t index){ | |
98 | //adds particle to jet. Calculates change in jet direction, | |
99 | //due to addition of this particle and if it is smaller, than fMaxDev, | |
100 | //add particle, axcept new direction and return true. | |
101 | ||
102 | fSumEnergy+=e ; | |
103 | fSumEta+=eta*e ; | |
104 | fSumPhi+=phi*e ; | |
105 | ||
106 | //check if this a leading particle? | |
107 | if(fLEnergy < e){ | |
108 | fLEnergy = e; | |
109 | fLEta = eta ; | |
110 | fLPhi = phi ; | |
111 | } | |
112 | ||
113 | if(index >=0){ //add index to list of indexes | |
114 | if(!fList){ | |
115 | fList = new TArrayI(100) ; | |
116 | } | |
117 | if(fList->GetSize()<=fNpart+1){ | |
118 | TArrayI * tmp = new TArrayI(fNpart*2) ; | |
119 | tmp->Adopt(fList->GetSize(),fList->GetArray()) ; //note, we should not delete old array! | |
120 | fList=tmp ; | |
121 | } | |
122 | fList->AddAt(index,fNpart++) ; | |
123 | } | |
124 | } | |
125 | // //____________________________________________________________________________ | |
126 | // Bool_t AliPHOSJet::IsInJet(TParticle * p,Int_t mode) | |
127 | // { | |
128 | // Double_t dEta ; | |
129 | // Double_t dPhi ; | |
130 | // Double_t energy ; | |
131 | // if(!fEnergy){ //Final values not calculated yet, use intermediate | |
132 | // if(fSumEnergy==0) | |
133 | // return kTRUE ; //First particle | |
134 | // note p->Eta() causes fpe! | |
135 | // dEta=(p->Eta() - fSumEta/fSumEnergy) ; | |
136 | // dPhi=(p->Phi() - fSumPhi/fSumEnergy) ; | |
137 | // energy = fSumEnergy ; | |
138 | // } | |
139 | // else{ //calculated with respect to final | |
140 | // dEta=(p->Eta() - fEta) ; | |
141 | // dPhi=(p->Phi() - fPhi) ; | |
142 | // energy = fEnergy ; | |
143 | // } | |
144 | ||
145 | // switch (mode){ | |
146 | // case 0: | |
147 | // return IsInCone(eta,phi) ; //pure geometrical comparison | |
148 | // case 1: | |
149 | // return AcceptConeDeviation(dEta,dPhi,p->Energy() ); | |
150 | // default: | |
151 | // Error("IsInCone","Unknown mode of cone calculation %d \n",mode ); | |
152 | // } | |
153 | // return kFALSE ; | |
154 | //} | |
155 | //____________________________________________________________________________ | |
156 | Bool_t AliPHOSJet::AcceptConeDeviation(const TParticle * p)const | |
157 | { //Calculate cone deviation in case of inclusion of the given | |
158 | //particle to jet. | |
159 | ||
160 | Double_t tmpEnergy = fSumEnergy + p->Energy() ; | |
161 | Double_t tmpEta = fSumEta ; | |
162 | if(p->Pt()/p->Energy() >0.001) | |
163 | tmpEta+= p->Eta()*p->Energy() ; | |
164 | else | |
165 | tmpEta+= 100.*p->Pz() ; | |
166 | tmpEta = tmpEta/tmpEnergy / (fSumEta/fSumEnergy) - 1 ; | |
167 | Double_t tmpPhi = fSumPhi + p->Phi()*p->Energy() ; | |
168 | tmpPhi = tmpPhi/tmpEnergy /(fSumPhi/fSumEnergy) - 1 ; | |
169 | Double_t dev = TMath::Sqrt(tmpEta*tmpEta + tmpPhi*tmpPhi) ; | |
170 | if(dev < fMaxConeMove) | |
171 | return kTRUE ; | |
172 | else | |
173 | return kFALSE ; | |
174 | } | |
175 | //____________________________________________________________________________ | |
176 | Bool_t AliPHOSJet::AcceptConeDeviation(const Double_t e,const Double_t eta,const Double_t phi)const | |
177 | { //Calculate cone deviation in case of inclusion of the given | |
178 | //particle to jet. | |
179 | ||
180 | Double_t tmpEnergy = fSumEnergy + e ; | |
181 | Double_t tmpEta = fSumEta + eta*e ; | |
182 | tmpEta = tmpEta/tmpEnergy / (fSumEta/fSumEnergy) ; | |
183 | Double_t tmpPhi = fSumPhi + phi*e ; | |
184 | tmpPhi = tmpPhi/tmpEnergy /(fSumPhi/fSumEnergy) ; | |
185 | Double_t dev = TMath::Sqrt(tmpEta*tmpEta + tmpPhi*tmpPhi) ; | |
186 | if(dev<fMaxConeMove && dev > fMinConeMove) | |
187 | return kTRUE ; | |
188 | else | |
189 | return kFALSE ; | |
190 | } | |
191 | //____________________________________________________________________________ | |
192 | Bool_t AliPHOSJet::IsInCone(const TParticle * p)const | |
193 | {// | |
194 | Double_t dEta ; | |
195 | Double_t dPhi ; | |
196 | if(!fEnergy){ //Final values not calculated yet, use intermediate | |
197 | if(fSumEnergy==0) | |
198 | return kTRUE ; //First particle | |
199 | if(p->Pt()/p->Energy() > 0.001) | |
200 | dEta=(p->Eta() - fSumEta/fSumEnergy) ; | |
201 | else | |
202 | dEta=(100.*p->Pz()/p->Energy() - fSumEta/fSumEnergy) ; | |
203 | dPhi=(p->Phi() - fSumPhi/fSumEnergy) ; | |
204 | } | |
205 | else{ //calculated with respect to final | |
206 | if(p->Pt()/p->Energy() > 0.001) | |
207 | dEta=(p->Eta() - fEta) ; | |
208 | else | |
209 | dEta=(100.*p->Pz()/p->Energy() - fEta) ; | |
210 | dPhi=(p->Phi() - fPhi) ; | |
211 | } | |
212 | if(TMath::Sqrt(dEta*dEta + dPhi*dPhi) < fConeRad) | |
213 | return kTRUE ; | |
214 | else | |
215 | return kFALSE ; | |
216 | } | |
217 | //____________________________________________________________________________ | |
218 | Bool_t AliPHOSJet::IsInCone(const Double_t e,const Double_t eta,const Double_t phi)const | |
219 | {// | |
220 | Double_t dEta ; | |
221 | Double_t dPhi ; | |
222 | if(!fEnergy){ //Final values not calculated yet, use intermediate | |
223 | if(fSumEnergy==0) | |
224 | return kTRUE ; //First particle | |
225 | dEta=(eta - fSumEta/fSumEnergy) ; | |
226 | dPhi=(phi - fSumPhi/fSumEnergy) ; | |
227 | } | |
228 | else{ //calculated with respect to final | |
229 | dEta=(eta - fEta) ; | |
230 | dPhi=(phi - fPhi) ; | |
231 | } | |
232 | if(TMath::Sqrt(dEta*dEta + dPhi*dPhi) < fConeRad) | |
233 | return kTRUE ; | |
234 | else | |
235 | return kFALSE ; | |
236 | } | |
237 | //____________________________________________________________________________ | |
238 | Double_t AliPHOSJet::DistanceToJet(const TParticle *p)const{ | |
239 | //Calculate radius | |
240 | Double_t dEta ; | |
241 | Double_t dPhi ; | |
242 | if(!fEnergy){ //Final values not calculated yet, use intermediate | |
243 | if(fSumEnergy==0) | |
244 | return kTRUE ; //First particle | |
245 | if(p->Pt()/p->Energy() > 0.001) | |
246 | dEta=(p->Eta() - fSumEta/fSumEnergy) ; | |
247 | else | |
248 | dEta=(100.*p->Pz()/p->Energy() - fSumEta/fSumEnergy) ; | |
249 | dPhi=(p->Phi() - fSumPhi/fSumEnergy) ; | |
250 | } | |
251 | else{ //calculated with respect to final | |
252 | if(p->Pt()/p->Energy() > 0.001) | |
253 | dEta=(p->Eta() - fEta) ; | |
254 | else | |
255 | dEta=(100*p->Pz()/p->Energy() - fEta) ; | |
256 | dPhi=(p->Phi() - fPhi) ; | |
257 | } | |
258 | return TMath::Sqrt(dEta*dEta + dPhi*dPhi) ; | |
259 | ||
260 | } | |
261 | //____________________________________________________________________________ | |
262 | void AliPHOSJet::CalculateAll(void){ | |
263 | ||
264 | if(fSumEnergy==0) | |
265 | return ; //Nothing to calculate | |
266 | ||
267 | fEta = fSumEta/fSumEnergy ; | |
268 | fPhi = fSumPhi/fSumEnergy ; | |
269 | fEnergy = fSumEnergy ; | |
270 | ||
271 | fSumEnergy = 0. ; | |
272 | fSumEta = 0. ; | |
273 | fSumPhi = 0. ; | |
274 | } | |
275 | //____________________________________________________________________________ | |
276 | void AliPHOSJet::Print(Option_t * option){ | |
277 | printf("-------------- AliPHOSJet ------------\n") ; | |
278 | printf(" Energy............. %f \n",fEnergy) ; | |
279 | printf(" Eta................ %f \n",fEta ) ; | |
280 | printf(" Phi................ %f \n",fPhi ) ; | |
281 | printf(" Leading Energy..... %f \n",fLEnergy) ; | |
282 | printf(" Leading Eta........ %f \n",fLEta) ; | |
283 | printf(" Leading Phi........ %f \n",fLPhi) ; | |
284 | printf(" N particles in jet %d \n",fNpart) ; | |
285 | printf("----------------------------------\n") ; | |
286 | } |