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e201f2eb | 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 | ||
abe00f6f | 18 | //___________________________________________________ |
19 | //////////////////////////////////////////////////////////////////////////////// | |
20 | // | |
21 | // class AliHBTPositionRandomizer | |
22 | // | |
23 | // These class randomizes particle vertex positions | |
24 | // Piotr.Skowronski@cern.ch | |
25 | // | |
26 | //////////////////////////////////////////////////////////////////////////////// | |
27 | ||
88cb7938 | 28 | #include <TRandom.h> |
e201f2eb | 29 | |
415b66b5 | 30 | #include "AliAOD.h" |
e201f2eb | 31 | #include "AliHBTPositionRandomizer.h" |
32 | #include "AliLog.h" | |
415b66b5 | 33 | #include "AliVAODParticle.h" |
88cb7938 | 34 | |
35 | ||
36 | ClassImp(AliHBTPositionRandomizer) | |
37 | ||
a296aa84 | 38 | const Int_t AliHBTPositionRandomizer::fgkNumberOfPids = 10; |
39 | ||
88cb7938 | 40 | /*********************************************************************/ |
41 | ||
42 | AliHBTPositionRandomizer::AliHBTPositionRandomizer(): | |
43 | fReader(0x0), | |
a296aa84 | 44 | fDefaultRandomizer(0x0), |
45 | fRandomizers(0x0), | |
46 | fNPid(0), | |
47 | fPids(0x0), | |
88cb7938 | 48 | fAddToExistingPos(kFALSE), |
49 | fOnlyParticlesFromVertex(kFALSE), | |
3a3bc78a | 50 | fRandomizeTracks(kFALSE), |
88cb7938 | 51 | fVX(0.0), |
52 | fVY(0.0), | |
53 | fVZ(0.0) | |
54 | { | |
55 | //constructor | |
56 | } | |
57 | /*********************************************************************/ | |
58 | ||
415b66b5 | 59 | AliHBTPositionRandomizer::AliHBTPositionRandomizer(AliReader* reader): |
88cb7938 | 60 | fReader(reader), |
a296aa84 | 61 | fRandomizers(new TObjArray(fgkNumberOfPids)), |
62 | fNPid(1), | |
63 | fPids(new Int_t[fgkNumberOfPids]), | |
88cb7938 | 64 | fAddToExistingPos(kFALSE), |
65 | fOnlyParticlesFromVertex(kFALSE), | |
3a3bc78a | 66 | fRandomizeTracks(kFALSE), |
88cb7938 | 67 | fVX(0.0), |
68 | fVY(0.0), | |
69 | fVZ(0.0) | |
70 | { | |
71 | //constructor | |
a296aa84 | 72 | fRandomizers->AddAt(new AliHBTRndmGaussBall(8.0,0.0,0.0),0); |
88cb7938 | 73 | } |
74 | /*********************************************************************/ | |
75 | ||
abe00f6f | 76 | AliHBTPositionRandomizer::AliHBTPositionRandomizer(const AliHBTPositionRandomizer& in): |
415b66b5 | 77 | AliReader(in), |
abe00f6f | 78 | fReader(), |
a296aa84 | 79 | fRandomizers(0x0), |
80 | fNPid(0), | |
81 | fPids(0x0), | |
abe00f6f | 82 | fAddToExistingPos(kFALSE), |
83 | fOnlyParticlesFromVertex(kFALSE), | |
3a3bc78a | 84 | fRandomizeTracks(kFALSE), |
abe00f6f | 85 | fVX(0.0), |
86 | fVY(0.0), | |
87 | fVZ(0.0) | |
88 | { | |
89 | //cpy constructor | |
90 | in.Copy(*this); | |
91 | } | |
92 | /*********************************************************************/ | |
93 | AliHBTPositionRandomizer::~AliHBTPositionRandomizer() | |
94 | { | |
95 | //dtor | |
96 | delete fReader; | |
a296aa84 | 97 | delete fRandomizers; |
98 | delete [] fPids; | |
abe00f6f | 99 | } |
100 | /*********************************************************************/ | |
34914285 | 101 | AliHBTPositionRandomizer& AliHBTPositionRandomizer::operator=(const AliHBTPositionRandomizer& in) |
abe00f6f | 102 | { |
103 | //assigment operator | |
104 | in.Copy(*this); | |
105 | return *this; | |
106 | } | |
107 | /*********************************************************************/ | |
108 | ||
1c654289 | 109 | AliAOD* AliHBTPositionRandomizer::GetEventSim() const |
efaf00f8 | 110 | { |
111 | // gets from fReader and randomizes current particle event | |
1c654289 | 112 | if (fReader == 0x0) |
113 | { | |
114 | Error("GetEventSim","Reader is null"); | |
115 | return 0x0; | |
116 | } | |
415b66b5 | 117 | AliAOD *e = fReader->GetEventSim(); |
6c15cd50 | 118 | if (e) |
119 | if (e->IsRandomized() == kFALSE) | |
120 | Randomize(e); | |
efaf00f8 | 121 | return e; |
122 | } | |
123 | /*********************************************************************/ | |
124 | ||
1c654289 | 125 | AliAOD* AliHBTPositionRandomizer::GetEventRec() const |
efaf00f8 | 126 | { |
127 | // gets from fReader and randomizes current track event | |
1c654289 | 128 | if (fReader == 0x0) |
129 | { | |
130 | Error("GetEventRec","Reader is null"); | |
131 | return 0x0; | |
132 | } | |
415b66b5 | 133 | AliAOD *e = fReader->GetEventRec(); |
6c15cd50 | 134 | if (fRandomizeTracks && e) if (e->IsRandomized() == kFALSE) Randomize(e); |
efaf00f8 | 135 | return e; |
136 | } | |
137 | /*********************************************************************/ | |
138 | ||
415b66b5 | 139 | AliAOD* AliHBTPositionRandomizer::GetEventSim(Int_t n) |
88cb7938 | 140 | { |
141 | //returns event n | |
142 | if (fReader == 0x0) return 0x0; | |
415b66b5 | 143 | AliAOD *e = fReader->GetEventSim(n); |
88cb7938 | 144 | if (e->IsRandomized() == kFALSE) Randomize(e); |
145 | return e; | |
146 | } | |
147 | ||
148 | /*********************************************************************/ | |
415b66b5 | 149 | void AliHBTPositionRandomizer::Randomize(AliAOD* event) const |
88cb7938 | 150 | { |
151 | // randomizes postions of all particles in the event | |
abe00f6f | 152 | static const Double_t kfmtocm = 1.e-13; |
e201f2eb | 153 | AliDebug(5," "); |
88cb7938 | 154 | if (event == 0x0) return; |
155 | ||
156 | for (Int_t i = 0; i < event->GetNumberOfParticles(); i++) | |
157 | { | |
415b66b5 | 158 | AliVAODParticle* p = event->GetParticle(i); |
88cb7938 | 159 | Double_t x,y,z,t=0.0; |
a296aa84 | 160 | AliHBTRndm* r = GetRandomizer(p->GetPdgCode()); |
161 | r->Randomize(x,y,z,t,p); | |
3a3bc78a | 162 | |
163 | Double_t nx = x*kfmtocm; | |
164 | Double_t ny = y*kfmtocm; | |
165 | Double_t nz = z*kfmtocm; | |
166 | Double_t nt = t*kfmtocm; | |
167 | ||
168 | if (fAddToExistingPos) | |
169 | { | |
170 | nx += p->Vx(); | |
171 | ny += p->Vy(); | |
172 | nz += p->Vz(); | |
173 | nt += p->T(); | |
174 | } | |
175 | p->SetProductionVertex(nx,ny,nz,nt); | |
88cb7938 | 176 | } |
177 | event->SetRandomized(); | |
178 | } | |
179 | /*********************************************************************/ | |
180 | ||
a296aa84 | 181 | AliHBTRndm* AliHBTPositionRandomizer::GetRandomizer(Int_t pdg) const |
182 | { | |
183 | //returns randomizer for a given pdg | |
184 | Int_t idx = GetRandomizerIndex(pdg);//in most of cases | |
185 | if (idx < 0) idx = 0;//if not found return a default one | |
186 | return (AliHBTRndm*)fRandomizers->At(idx); | |
187 | } | |
188 | /*********************************************************************/ | |
189 | Int_t AliHBTPositionRandomizer::GetRandomizerIndex(Int_t pdg) const | |
190 | { | |
191 | //returns randomizer index for a given pdg | |
192 | ||
193 | if (pdg == 0) return 0; | |
194 | ||
195 | for (Int_t i=1; i < fNPid; i++) | |
196 | { | |
197 | if (fPids[i] == pdg) | |
198 | return i; | |
199 | } | |
200 | ||
201 | return -1; | |
202 | } | |
203 | /*********************************************************************/ | |
204 | ||
205 | void AliHBTPositionRandomizer::SetRandomizer(Int_t pid, AliHBTRndm* rndm) | |
206 | { | |
207 | //sets the randomizer for a given particle type | |
208 | if (rndm == 0x0) | |
209 | { | |
210 | Error("SetRandomizer","Randomizer is null"); | |
211 | return; | |
212 | } | |
213 | ||
214 | Int_t idx = GetRandomizerIndex(pid); | |
215 | if (idx >= 0) | |
216 | { | |
217 | delete fRandomizers->At(idx); | |
218 | fRandomizers->AddAt(rndm,idx); | |
219 | } | |
220 | ||
221 | if (fNPid == fgkNumberOfPids) | |
222 | { | |
223 | Error("SetRandomizer","There is no more space in the array"); | |
224 | return; | |
225 | } | |
226 | ||
227 | fPids[fNPid] = pid; | |
228 | fRandomizers->AddAt(rndm,fNPid); | |
229 | fNPid++; | |
230 | } | |
231 | /*********************************************************************/ | |
232 | ||
233 | void AliHBTPositionRandomizer::SetGaussianBall(Int_t pid, Double_t r, Double_t meantime, Double_t sigmatime) | |
88cb7938 | 234 | { |
abe00f6f | 235 | //Sets Gaussian Ball Model |
a296aa84 | 236 | SetGaussianBall(pid,r,r,r,meantime,sigmatime); |
88cb7938 | 237 | } |
238 | /*********************************************************************/ | |
239 | ||
a296aa84 | 240 | void AliHBTPositionRandomizer::SetGaussianBall(Int_t pid, Double_t rx, Double_t ry, Double_t rz, Double_t meantime, Double_t sigmatime) |
88cb7938 | 241 | { |
abe00f6f | 242 | //Sets Gaussian Ball Model |
a296aa84 | 243 | AliHBTRndm* rndm = new AliHBTRndmGaussBall(rx,ry,rz,meantime,sigmatime); |
244 | SetRandomizer(pid,rndm); | |
88cb7938 | 245 | } |
246 | /*********************************************************************/ | |
247 | ||
a296aa84 | 248 | void AliHBTPositionRandomizer::SetCyllinderSurface(Int_t pid, Double_t r, Double_t l) |
88cb7938 | 249 | { |
abe00f6f | 250 | //Sets Cylinder Surface Model |
a296aa84 | 251 | AliHBTRndm* rndm = new AliHBTRndmCyllSurf(r,l); |
252 | SetRandomizer(pid,rndm); | |
88cb7938 | 253 | } |
254 | /*********************************************************************/ | |
255 | ||
256 | void AliHBTPositionRandomizer::SetEventVertex(Double_t x, Double_t y,Double_t z) | |
257 | { | |
258 | //sets event vertex position | |
259 | fVX = x; | |
260 | fVY = y; | |
261 | fVZ = z; | |
262 | } | |
94a709e1 | 263 | |
264 | ||
a296aa84 | 265 | void AliHBTPositionRandomizer::SetEllipse(Int_t pid, Double_t rx, Double_t ryz) |
94a709e1 | 266 | { |
a296aa84 | 267 | //sets the ellipse randomization for the given pid |
268 | AliHBTRndm* rndm = new AliHBTRndmEllipse(rx,ryz); | |
269 | SetRandomizer(pid,rndm); | |
94a709e1 | 270 | } |
271 | ||
88cb7938 | 272 | /*********************************************************************/ |
273 | //_____________________________________________________________________ | |
274 | /////////////////////////////////////////////////////////////////////// | |
275 | // // | |
276 | // class AliHBTRndmGaussBall // | |
277 | // // | |
278 | /////////////////////////////////////////////////////////////////////// | |
279 | ||
280 | AliHBTRndmGaussBall::AliHBTRndmGaussBall(): | |
281 | fRx(0.0), | |
282 | fRy(0.0), | |
a296aa84 | 283 | fRz(0.0), |
284 | fTmean(0.0), | |
285 | fTsigma(0.0) | |
88cb7938 | 286 | { |
287 | //constructor | |
288 | } | |
289 | /*********************************************************************/ | |
290 | ||
a296aa84 | 291 | AliHBTRndmGaussBall::AliHBTRndmGaussBall(Float_t r, Double_t meantime, Double_t sigmatime): |
88cb7938 | 292 | fRx(r), |
293 | fRy(r), | |
a296aa84 | 294 | fRz(r), |
295 | fTmean(meantime), | |
296 | fTsigma(sigmatime) | |
88cb7938 | 297 | { |
298 | //constructor | |
299 | } | |
300 | /*********************************************************************/ | |
301 | ||
a296aa84 | 302 | AliHBTRndmGaussBall::AliHBTRndmGaussBall(Float_t rx, Float_t ry, Float_t rz, Double_t meantime, Double_t sigmatime): |
88cb7938 | 303 | fRx(rx), |
304 | fRy(ry), | |
a296aa84 | 305 | fRz(rz), |
306 | fTmean(meantime), | |
307 | fTsigma(sigmatime) | |
88cb7938 | 308 | { |
309 | //constructor | |
310 | } | |
311 | /*********************************************************************/ | |
312 | ||
94a709e1 | 313 | |
314 | AliHBTRndmEllipse::AliHBTRndmEllipse(Float_t rmin, Float_t rmax): | |
315 | fRmin(rmin), | |
316 | fRmax(rmax) | |
317 | { | |
318 | //constructor | |
319 | } | |
320 | ||
321 | /*********************************************************************/ | |
322 | ||
a296aa84 | 323 | void AliHBTRndmGaussBall::Randomize(Double_t& x,Double_t& y,Double_t&z,Double_t&t, AliVAODParticle*/*particle*/) const |
88cb7938 | 324 | { |
325 | //randomizez gauss for each coordinate separately | |
326 | x = gRandom->Gaus(0.0,fRx); | |
327 | y = gRandom->Gaus(0.0,fRy); | |
328 | z = gRandom->Gaus(0.0,fRz); | |
a296aa84 | 329 | |
330 | if (fTsigma == 0.0) | |
331 | { | |
1a1e58ac | 332 | t = fTmean; |
a296aa84 | 333 | return; |
334 | } | |
335 | ||
336 | t = gRandom->Gaus(fTmean,fTsigma); | |
337 | ||
88cb7938 | 338 | } |
339 | /*********************************************************************/ | |
340 | //_____________________________________________________________________ | |
341 | /////////////////////////////////////////////////////////////////////// | |
342 | // // | |
343 | // class AliHBTRndmGaussBall // | |
344 | // // | |
345 | /////////////////////////////////////////////////////////////////////// | |
346 | ||
a296aa84 | 347 | void AliHBTRndmCyllSurf::Randomize(Double_t& x,Double_t& y,Double_t&z,Double_t&/*t*/, AliVAODParticle* particle) const |
88cb7938 | 348 | { |
abe00f6f | 349 | //Randomizes x,y,z |
568f8a1a | 350 | Double_t r = fR + gRandom->Gaus(0.0, 1.0); |
bed069a4 | 351 | Double_t sf = r/particle->Pt();//scaling factor for position transformation -> |
88cb7938 | 352 | //we move direction of string momentum but legth defined by r |
bed069a4 | 353 | x = sf*particle->Px(); |
354 | y = sf*particle->Py(); | |
88cb7938 | 355 | z = gRandom->Uniform(-fL,fL); |
88cb7938 | 356 | } |
94a709e1 | 357 | |
358 | /*********************************************************************/ | |
359 | /*********************************************************************/ | |
360 | ||
a296aa84 | 361 | void AliHBTRndmEllipse::Randomize(Double_t& x, Double_t& y, Double_t& z,Double_t&/*t*/, AliVAODParticle*p) const |
94a709e1 | 362 | { |
363 | // p=0; //workaround - fix this damn little thingy | |
364 | double R; | |
365 | double phi=p->Phi(); | |
366 | ||
367 | R=fRmin+(fRmax-fRmin)*TMath::Sin(phi); | |
368 | x=R*TMath::Sin(phi); | |
369 | y=R*TMath::Cos(phi); | |
370 | z=z; | |
371 | } |