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f1d945a1 | 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 | ||
f1d945a1 | 18 | // AliFlowTrackSimple: |
19 | // A simple track class to the the AliFlowEventSimple for flow analysis | |
20 | // | |
21 | // | |
22 | // author: N. van der Kolk (kolk@nikhef.nl) | |
929098e4 | 23 | // mods: Mikolaj Krzewicki (mikolaj.krzewicki@cern.ch) |
f1d945a1 | 24 | |
bc231a12 | 25 | #include "TObject.h" |
929098e4 | 26 | #include "TParticle.h" |
701f71c1 | 27 | #include "TParticlePDG.h" |
929098e4 | 28 | #include "AliFlowTrackSimple.h" |
7382279b | 29 | #include "TRandom.h" |
701f71c1 | 30 | #include "TMath.h" |
f1d945a1 | 31 | |
32 | ClassImp(AliFlowTrackSimple) | |
33 | ||
34 | //----------------------------------------------------------------------- | |
929098e4 | 35 | AliFlowTrackSimple::AliFlowTrackSimple(): |
bc231a12 | 36 | TObject(), |
f1d945a1 | 37 | fEta(0), |
38 | fPt(0), | |
39 | fPhi(0), | |
44e060e0 | 40 | fTrackWeight(1.), |
701f71c1 | 41 | fCharge(0), |
fb03b63f | 42 | fFlowBits(0), |
6e214c87 | 43 | fSubEventBits(0), |
41dc4195 | 44 | fID(-1) |
f1d945a1 | 45 | { |
46 | //constructor | |
929098e4 | 47 | } |
48 | ||
244c607a | 49 | //----------------------------------------------------------------------- |
701f71c1 | 50 | AliFlowTrackSimple::AliFlowTrackSimple(Double_t phi, Double_t eta, Double_t pt, Double_t weight, Int_t charge): |
bc231a12 | 51 | TObject(), |
244c607a | 52 | fEta(eta), |
53 | fPt(pt), | |
54 | fPhi(phi), | |
44e060e0 | 55 | fTrackWeight(weight), |
701f71c1 | 56 | fCharge(charge), |
244c607a | 57 | fFlowBits(0), |
6e214c87 | 58 | fSubEventBits(0), |
41dc4195 | 59 | fID(-1) |
244c607a | 60 | { |
61 | //constructor | |
62 | } | |
63 | ||
929098e4 | 64 | //----------------------------------------------------------------------- |
701f71c1 | 65 | AliFlowTrackSimple::AliFlowTrackSimple( TParticle* p ): |
bc231a12 | 66 | TObject(), |
929098e4 | 67 | fEta(p->Eta()), |
68 | fPt(p->Pt()), | |
69 | fPhi(p->Phi()), | |
44e060e0 | 70 | fTrackWeight(1.), |
701f71c1 | 71 | fCharge(0), |
929098e4 | 72 | fFlowBits(0), |
6e214c87 | 73 | fSubEventBits(0), |
41dc4195 | 74 | fID(-1) |
929098e4 | 75 | { |
76 | //ctor | |
701f71c1 | 77 | TParticlePDG* ppdg = p->GetPDG(); |
78 | fCharge = TMath::Nint(ppdg->Charge()/3.0); | |
f1d945a1 | 79 | } |
80 | ||
7d27a354 | 81 | //----------------------------------------------------------------------- |
82 | void AliFlowTrackSimple::Set(TParticle* p) | |
83 | { | |
84 | //set from a TParticle | |
85 | fEta = p->Eta(); | |
86 | fPt = p->Pt(); | |
87 | fPhi = p->Phi(); | |
88 | fTrackWeight = 1.; | |
89 | TParticlePDG* ppdg = p->GetPDG(); | |
90 | fCharge = TMath::Nint(ppdg->Charge()/3.0); | |
91 | } | |
92 | ||
bc6b015e | 93 | //----------------------------------------------------------------------- |
bc6b015e | 94 | AliFlowTrackSimple::AliFlowTrackSimple(const AliFlowTrackSimple& aTrack): |
bc231a12 | 95 | TObject(aTrack), |
bc6b015e | 96 | fEta(aTrack.fEta), |
97 | fPt(aTrack.fPt), | |
98 | fPhi(aTrack.fPhi), | |
44e060e0 | 99 | fTrackWeight(aTrack.fTrackWeight), |
701f71c1 | 100 | fCharge(aTrack.fCharge), |
fb03b63f | 101 | fFlowBits(aTrack.fFlowBits), |
6e214c87 | 102 | fSubEventBits(aTrack.fSubEventBits), |
41dc4195 | 103 | fID(aTrack.fID) |
bc6b015e | 104 | { |
105 | //copy constructor | |
106 | } | |
bc231a12 | 107 | |
bc6b015e | 108 | //----------------------------------------------------------------------- |
65ef7d1a | 109 | AliFlowTrackSimple* AliFlowTrackSimple::Clone(const char* /*option*/) const |
bc231a12 | 110 | { |
111 | //clone "constructor" | |
112 | return new AliFlowTrackSimple(*this); | |
113 | } | |
bc6b015e | 114 | |
bc231a12 | 115 | //----------------------------------------------------------------------- |
bc6b015e | 116 | AliFlowTrackSimple& AliFlowTrackSimple::operator=(const AliFlowTrackSimple& aTrack) |
117 | { | |
cc0afcfc | 118 | //assignment |
2047680a | 119 | if (&aTrack==this) return *this; //handle self assignmnet |
bc6b015e | 120 | fEta = aTrack.fEta; |
121 | fPt = aTrack.fPt; | |
122 | fPhi = aTrack.fPhi; | |
44e060e0 | 123 | fTrackWeight = aTrack.fTrackWeight; |
701f71c1 | 124 | fCharge = aTrack.fCharge; |
bc6b015e | 125 | fFlowBits = aTrack.fFlowBits; |
fb03b63f | 126 | fSubEventBits = aTrack.fSubEventBits; |
41dc4195 | 127 | fID = aTrack.fID; |
bc6b015e | 128 | |
129 | return *this; | |
bc6b015e | 130 | } |
131 | ||
f1d945a1 | 132 | //----------------------------------------------------------------------- |
f1d945a1 | 133 | AliFlowTrackSimple::~AliFlowTrackSimple() |
134 | { | |
135 | //destructor | |
136 | ||
137 | } | |
138 | ||
7382279b | 139 | //----------------------------------------------------------------------- |
244c607a | 140 | void AliFlowTrackSimple::ResolutionPt(Double_t res) |
7382279b | 141 | { |
244c607a | 142 | //smear the pt by a gaussian with sigma=res |
143 | fPt += gRandom->Gaus(0.,res); | |
7382279b | 144 | } |
145 | ||
146 | //----------------------------------------------------------------------- | |
bc231a12 | 147 | void AliFlowTrackSimple::AddV1( Double_t v1, |
148 | Double_t reactionPlaneAngle, | |
149 | Double_t precisionPhi, | |
150 | Int_t maxNumberOfIterations ) | |
151 | { | |
152 | //afterburner, adds v1, uses Newton-Raphson iteration | |
153 | Double_t phi0=fPhi; | |
c855d803 | 154 | Double_t f=0.; |
155 | Double_t fp=0.; | |
156 | Double_t phiprev=0.; | |
bc231a12 | 157 | |
158 | for (Int_t i=0; i<maxNumberOfIterations; i++) | |
159 | { | |
160 | phiprev=fPhi; //store last value for comparison | |
161 | f = fPhi-phi0+2.0*v1*TMath::Sin(fPhi-reactionPlaneAngle); | |
162 | fp = 1.0+2.0*v1*TMath::Cos(fPhi-reactionPlaneAngle); //first derivative | |
163 | fPhi -= f/fp; | |
164 | if (TMath::AreEqualAbs(phiprev,fPhi,precisionPhi)) break; | |
165 | } | |
166 | } | |
167 | ||
168 | //----------------------------------------------------------------------- | |
169 | void AliFlowTrackSimple::AddV2( Double_t v2, | |
170 | Double_t reactionPlaneAngle, | |
171 | Double_t precisionPhi, | |
172 | Int_t maxNumberOfIterations ) | |
7382279b | 173 | { |
244c607a | 174 | //afterburner, adds v2, uses Newton-Raphson iteration |
175 | Double_t phi0=fPhi; | |
c855d803 | 176 | Double_t f=0.; |
177 | Double_t fp=0.; | |
178 | Double_t phiprev=0.; | |
bc231a12 | 179 | |
180 | for (Int_t i=0; i<maxNumberOfIterations; i++) | |
181 | { | |
182 | phiprev=fPhi; //store last value for comparison | |
183 | f = fPhi-phi0+v2*TMath::Sin(2.*(fPhi-reactionPlaneAngle)); | |
184 | fp = 1.0+2.0*v2*TMath::Cos(2.*(fPhi-reactionPlaneAngle)); //first derivative | |
185 | fPhi -= f/fp; | |
186 | if (TMath::AreEqualAbs(phiprev,fPhi,precisionPhi)) break; | |
187 | } | |
188 | } | |
189 | ||
bff213ad | 190 | //----------------------------------------------------------------------- |
191 | void AliFlowTrackSimple::AddV3( Double_t v3, | |
192 | Double_t reactionPlaneAngle, | |
193 | Double_t precisionPhi, | |
194 | Int_t maxNumberOfIterations ) | |
195 | { | |
196 | //afterburner, adds v3, uses Newton-Raphson iteration | |
197 | Double_t phi0=fPhi; | |
198 | Double_t f=0.; | |
199 | Double_t fp=0.; | |
200 | Double_t phiprev=0.; | |
201 | ||
202 | for (Int_t i=0; i<maxNumberOfIterations; i++) | |
203 | { | |
204 | phiprev=fPhi; //store last value for comparison | |
205 | f = fPhi-phi0+2./3.*v3*TMath::Sin(3.*(fPhi-reactionPlaneAngle)); | |
206 | fp = 1.0+2.0*v3*TMath::Cos(3.*(fPhi-reactionPlaneAngle)); //first derivative | |
207 | fPhi -= f/fp; | |
208 | if (TMath::AreEqualAbs(phiprev,fPhi,precisionPhi)) break; | |
209 | } | |
210 | } | |
211 | ||
bc231a12 | 212 | //----------------------------------------------------------------------- |
213 | void AliFlowTrackSimple::AddV4( Double_t v4, | |
214 | Double_t reactionPlaneAngle, | |
215 | Double_t precisionPhi, | |
216 | Int_t maxNumberOfIterations ) | |
217 | { | |
218 | //afterburner, adds v4, uses Newton-Raphson iteration | |
219 | Double_t phi0=fPhi; | |
c855d803 | 220 | Double_t f=0.; |
221 | Double_t fp=0.; | |
222 | Double_t phiprev=0.; | |
bc231a12 | 223 | |
224 | for (Int_t i=0; i<maxNumberOfIterations; i++) | |
225 | { | |
226 | phiprev=fPhi; //store last value for comparison | |
227 | f = fPhi-phi0+0.5*v4*TMath::Sin(4.*(fPhi-reactionPlaneAngle)); | |
228 | fp = 1.0+2.0*v4*TMath::Cos(4.*(fPhi-reactionPlaneAngle)); //first derivative | |
229 | fPhi -= f/fp; | |
230 | if (TMath::AreEqualAbs(phiprev,fPhi,precisionPhi)) break; | |
231 | } | |
232 | } | |
233 | ||
1a80f9f6 | 234 | //----------------------------------------------------------------------- |
235 | void AliFlowTrackSimple::AddV5( Double_t v5, | |
236 | Double_t reactionPlaneAngle, | |
237 | Double_t precisionPhi, | |
238 | Int_t maxNumberOfIterations ) | |
239 | { | |
240 | //afterburner, adds v4, uses Newton-Raphson iteration | |
241 | Double_t phi0=fPhi; | |
242 | Double_t f=0.; | |
243 | Double_t fp=0.; | |
244 | Double_t phiprev=0.; | |
245 | ||
246 | for (Int_t i=0; i<maxNumberOfIterations; i++) | |
247 | { | |
248 | phiprev=fPhi; //store last value for comparison | |
249 | f = fPhi-phi0+0.4*v5*TMath::Sin(5.*(fPhi-reactionPlaneAngle)); | |
250 | fp = 1.0+2.0*v5*TMath::Cos(5.*(fPhi-reactionPlaneAngle)); //first derivative | |
251 | fPhi -= f/fp; | |
252 | if (TMath::AreEqualAbs(phiprev,fPhi,precisionPhi)) break; | |
253 | } | |
254 | } | |
255 | ||
256 | //______________________________________________________________________________ | |
257 | void AliFlowTrackSimple::AddFlow( Double_t v1, | |
258 | Double_t v2, | |
259 | Double_t v3, | |
260 | Double_t v4, | |
261 | Double_t v5, | |
262 | Double_t rp1, | |
263 | Double_t rp2, | |
264 | Double_t rp3, | |
265 | Double_t rp4, | |
266 | Double_t rp5, | |
267 | Double_t precisionPhi, | |
268 | Int_t maxNumberOfIterations ) | |
269 | { | |
270 | //afterburner, adds v1,v2,v4 uses Newton-Raphson iteration | |
271 | Double_t phi0=fPhi; | |
272 | Double_t f=0.; | |
273 | Double_t fp=0.; | |
274 | Double_t phiprev=0.; | |
275 | ||
276 | for (Int_t i=0; i<maxNumberOfIterations; i++) | |
277 | { | |
278 | phiprev=fPhi; //store last value for comparison | |
279 | f = fPhi-phi0 | |
280 | +2.0* v1*TMath::Sin( fPhi-rp1) | |
281 | + v2*TMath::Sin(2.*(fPhi-rp2)) | |
282 | +2./3.*v3*TMath::Sin(3.*(fPhi-rp3)) | |
283 | +0.5* v4*TMath::Sin(4.*(fPhi-rp4)) | |
284 | +0.4* v5*TMath::Sin(5.*(fPhi-rp5)) | |
285 | ; | |
286 | fp = 1.0 | |
287 | +2.0*( | |
288 | +v1*TMath::Cos( fPhi-rp1) | |
289 | +v2*TMath::Cos(2.*(fPhi-rp2)) | |
290 | +v3*TMath::Cos(3.*(fPhi-rp3)) | |
291 | +v4*TMath::Cos(4.*(fPhi-rp4)) | |
292 | +v5*TMath::Cos(5.*(fPhi-rp5)) | |
293 | ); //first derivative | |
294 | fPhi -= f/fp; | |
295 | if (TMath::AreEqualAbs(phiprev,fPhi,precisionPhi)) break; | |
296 | } | |
297 | } | |
298 | ||
299 | //______________________________________________________________________________ | |
300 | void AliFlowTrackSimple::AddFlow( Double_t v1, | |
301 | Double_t v2, | |
302 | Double_t v3, | |
303 | Double_t v4, | |
304 | Double_t v5, | |
305 | Double_t rp, | |
306 | Double_t precisionPhi, | |
307 | Int_t maxNumberOfIterations ) | |
308 | { | |
309 | //afterburner, adds v1,v2,v4 uses Newton-Raphson iteration | |
310 | AddFlow(v1,v2,v3,v4,v5,rp,rp,rp,rp,rp,precisionPhi,maxNumberOfIterations); | |
311 | } | |
312 | ||
bc231a12 | 313 | //______________________________________________________________________________ |
314 | void AliFlowTrackSimple::AddFlow( Double_t v1, | |
315 | Double_t v2, | |
bff213ad | 316 | Double_t v3, |
bc231a12 | 317 | Double_t v4, |
318 | Double_t reactionPlaneAngle, | |
319 | Double_t precisionPhi, | |
320 | Int_t maxNumberOfIterations ) | |
321 | { | |
322 | //afterburner, adds v1,v2,v4 uses Newton-Raphson iteration | |
323 | Double_t phi0=fPhi; | |
c855d803 | 324 | Double_t f=0.; |
325 | Double_t fp=0.; | |
326 | Double_t phiprev=0.; | |
244c607a | 327 | |
328 | for (Int_t i=0; i<maxNumberOfIterations; i++) | |
329 | { | |
330 | phiprev=fPhi; //store last value for comparison | |
bc231a12 | 331 | f = fPhi-phi0 |
bff213ad | 332 | +2.0* v1*TMath::Sin( fPhi-reactionPlaneAngle) |
333 | + v2*TMath::Sin(2.*(fPhi-reactionPlaneAngle)) | |
334 | +2./3.*v3*TMath::Sin(3.*(fPhi-reactionPlaneAngle)) | |
335 | +0.5* v4*TMath::Sin(4.*(fPhi-reactionPlaneAngle)) | |
bc231a12 | 336 | ; |
337 | fp = 1.0 | |
338 | +2.0*( | |
bff213ad | 339 | +v1*TMath::Cos( fPhi-reactionPlaneAngle) |
bc231a12 | 340 | +v2*TMath::Cos(2.*(fPhi-reactionPlaneAngle)) |
bff213ad | 341 | +v3*TMath::Cos(3.*(fPhi-reactionPlaneAngle)) |
bc231a12 | 342 | +v4*TMath::Cos(4.*(fPhi-reactionPlaneAngle)) |
343 | ); //first derivative | |
244c607a | 344 | fPhi -= f/fp; |
345 | if (TMath::AreEqualAbs(phiprev,fPhi,precisionPhi)) break; | |
346 | } | |
7382279b | 347 | } |
bc231a12 | 348 | |
349 | //______________________________________________________________________________ | |
65ef7d1a | 350 | void AliFlowTrackSimple::Print( Option_t* /*option*/ ) const |
bc231a12 | 351 | { |
352 | //print stuff | |
44e060e0 | 353 | printf("Phi: %.3f, Eta: %+.3f, Pt: %.3f, weight: %.3f",fPhi,fEta,fPt,fTrackWeight); |
dd91b595 | 354 | if (InRPSelection()) printf(", RP"); |
355 | if (InPOISelection()) printf(", POI"); | |
356 | for (Int_t i=0; i<2; i++) | |
357 | { | |
358 | if (InSubevent(i)) printf(", subevent %i",i); | |
359 | } | |
360 | printf("\n"); | |
bc231a12 | 361 | } |
7d27a354 | 362 | |
363 | //______________________________________________________________________________ | |
364 | void AliFlowTrackSimple::Clear(Option_t*) | |
365 | { | |
366 | //clear track | |
367 | fEta=0.0; | |
368 | fPt=0.0; | |
369 | fPhi=0.0; | |
370 | fTrackWeight=1.0; | |
371 | fCharge=0; | |
372 | fFlowBits.ResetAllBits(); | |
373 | fSubEventBits.ResetAllBits(); | |
374 | fID=-1; | |
375 | } |