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4c039060 | 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 | ||
f531a546 | 16 | // $Id$ |
4c039060 | 17 | |
959fbac5 | 18 | /////////////////////////////////////////////////////////////////////////// |
19 | // Class AliTrack | |
20 | // Handling of the attributes of a reconstructed particle track. | |
21 | // | |
22 | // Coding example : | |
23 | // ---------------- | |
24 | // | |
25 | // Float_t a[4]={195.,1.2,-0.04,8.5}; | |
26 | // Ali4Vector pmu; | |
27 | // pmu.SetVector(a,"car"); | |
28 | // AliTrack t1; | |
29 | // t1.Set4Momentum(pmu); | |
30 | // | |
31 | // Float_t b[3]={1.2,-0.04,8.5}; | |
32 | // Ali3Vector p; | |
33 | // p.SetVector(b,"car"); | |
34 | // AliTrack t2; | |
35 | // t2.Set3Momentum(p); | |
36 | // t2.SetCharge(0); | |
37 | // t2.SetMass(1.115); | |
38 | // | |
84bb7c66 | 39 | // t1.Data(); |
40 | // t2.Data(); | |
959fbac5 | 41 | // |
42 | // Float_t pi=acos(-1.); | |
43 | // Float_t thcms=0.2*pi; // decay theta angle in cms | |
44 | // Float_t phicms=pi/4.; // decay theta angle in cms | |
45 | // Float_t m1=0.938; | |
46 | // Float_t m2=0.140; | |
47 | // t2.Decay(m1,m2,thcms,phicms); // Track t2 decay : Lambda -> proton + pion | |
48 | // | |
49 | // t2.List(); | |
50 | // | |
51 | // Int_t ndec=t2.GetNdecay(); | |
52 | // AliTrack* d1=t2.GetDecayTrack(1); // Access to decay track number 1 | |
53 | // AliTrack* d2=t2.GetDecayTrack(2); // Access to decay track number 2 | |
54 | // | |
55 | // AliSignal s1,s2,s3,s4; | |
56 | // | |
57 | // .... // Code (e.g. detector readout) to fill AliSignal data | |
58 | // | |
59 | // AliTrack trec; // Track which will be reconstructed from signals | |
60 | // trec.AddSignal(s1); | |
61 | // trec.AddSignal(s3); | |
62 | // trec.AddSignal(s4); | |
63 | // | |
64 | // Ali3Vector P; | |
65 | // Float_t Q,M; | |
66 | // | |
67 | // ... // Code which accesses signals from trec and reconstructs | |
68 | // 3-momentum P, charge Q, mass M etc... | |
69 | // | |
70 | // trec.Set3Momentum(P); | |
71 | // trec.SetCharge(Q); | |
72 | // trec.SetMass(M); | |
73 | // | |
74 | // Float_t r1[3]={1.6,-3.8,25.7}; | |
75 | // Float_t er1[3]={0.2,0.5,1.8}; | |
76 | // Float_t r2[3]={8.6,23.8,-6.7}; | |
77 | // Float_t er2[3]={0.93,1.78,0.8}; | |
78 | // AliPosition begin,end; | |
79 | // begin.SetPosition(r1,"car"); | |
80 | // begin.SetPositionErrors(er1,"car"); | |
81 | // end.SetPosition(r2,"car"); | |
82 | // end.SetPositionErrors(er2,"car"); | |
83 | // trec.SetBeginPoint(begin); | |
84 | // trec.SetEndPoint(end); | |
85 | // | |
86 | // Note : All quantities are in GeV, GeV/c or GeV/c**2 | |
87 | // | |
88 | //--- Author: Nick van Eijndhoven 10-jul-1997 UU-SAP Utrecht | |
f531a546 | 89 | //- Modified: NvE $Date$ UU-SAP Utrecht |
959fbac5 | 90 | /////////////////////////////////////////////////////////////////////////// |
91 | ||
d88f97cc | 92 | #include "AliTrack.h" |
c72198f1 | 93 | #include "Riostream.h" |
d88f97cc | 94 | |
95 | ClassImp(AliTrack) // Class implementation to enable ROOT I/O | |
96 | ||
5f25234b | 97 | AliTrack::AliTrack() : TNamed(),Ali4Vector() |
d88f97cc | 98 | { |
99 | // Default constructor | |
100 | // All variables initialised to 0 | |
6516b62d | 101 | Init(); |
102 | Reset(); | |
103 | } | |
104 | /////////////////////////////////////////////////////////////////////////// | |
105 | void AliTrack::Init() | |
106 | { | |
107 | // Initialisation of pointers etc... | |
d88f97cc | 108 | fDecays=0; |
959fbac5 | 109 | fSignals=0; |
5f25234b | 110 | fHypotheses=0; |
c72198f1 | 111 | fBegin=0; |
112 | fEnd=0; | |
113 | fImpactXY=0; | |
114 | fImpactXZ=0; | |
115 | fImpactYZ=0; | |
116 | fClosest=0; | |
1fbffa23 | 117 | fParent=0; |
d88f97cc | 118 | } |
119 | /////////////////////////////////////////////////////////////////////////// | |
120 | AliTrack::~AliTrack() | |
121 | { | |
5f25234b | 122 | // Destructor to delete memory allocated for decay tracks array. |
123 | // This destructor automatically cleares the pointer of this AliTrack | |
124 | // from all the link slots of the related AliSignal objects. | |
125 | ||
126 | Int_t nsig=GetNsignals(); | |
127 | for (Int_t i=1; i<=nsig; i++) | |
128 | { | |
129 | AliSignal* s=GetSignal(i); | |
d0a8ef71 | 130 | if (s) s->ResetLinks(this); |
5f25234b | 131 | } |
132 | ||
d88f97cc | 133 | if (fDecays) |
134 | { | |
d88f97cc | 135 | delete fDecays; |
136 | fDecays=0; | |
137 | } | |
959fbac5 | 138 | if (fSignals) |
139 | { | |
140 | fSignals->Clear(); | |
141 | delete fSignals; | |
142 | fSignals=0; | |
143 | } | |
5f25234b | 144 | if (fHypotheses) |
c72198f1 | 145 | { |
5f25234b | 146 | delete fHypotheses; |
147 | fHypotheses=0; | |
c72198f1 | 148 | } |
149 | if (fBegin) | |
150 | { | |
151 | delete fBegin; | |
152 | fBegin=0; | |
153 | } | |
154 | if (fEnd) | |
155 | { | |
156 | delete fEnd; | |
157 | fEnd=0; | |
158 | } | |
159 | if (fImpactXY) | |
160 | { | |
161 | delete fImpactXY; | |
162 | fImpactXY=0; | |
163 | } | |
164 | if (fImpactXZ) | |
165 | { | |
166 | delete fImpactXZ; | |
167 | fImpactXZ=0; | |
168 | } | |
169 | if (fImpactYZ) | |
170 | { | |
171 | delete fImpactYZ; | |
172 | fImpactYZ=0; | |
173 | } | |
174 | if (fClosest) | |
175 | { | |
176 | delete fClosest; | |
177 | fClosest=0; | |
178 | } | |
d88f97cc | 179 | } |
180 | /////////////////////////////////////////////////////////////////////////// | |
261c0caf | 181 | AliTrack::AliTrack(const AliTrack& t) : TNamed(t),Ali4Vector(t) |
6516b62d | 182 | { |
183 | // Copy constructor | |
184 | Init(); | |
185 | ||
c72198f1 | 186 | fQ=t.fQ; |
5f25234b | 187 | fProb=t.fProb; |
c72198f1 | 188 | if (t.fBegin) fBegin=new AliPositionObj(*(t.fBegin)); |
189 | if (t.fEnd) fEnd=new AliPositionObj(*(t.fEnd)); | |
190 | if (t.fImpactXY) fImpactXY=new AliPositionObj(*(t.fImpactXY)); | |
191 | if (t.fImpactXZ) fImpactXZ=new AliPositionObj(*(t.fImpactXZ)); | |
192 | if (t.fImpactYZ) fImpactYZ=new AliPositionObj(*(t.fImpactYZ)); | |
193 | if (t.fClosest) fClosest=new AliPositionObj(*(t.fClosest)); | |
194 | fUserId=t.fUserId; | |
195 | fChi2=t.fChi2; | |
196 | fNdf=t.fNdf; | |
197 | fCode=t.fCode; | |
1fbffa23 | 198 | fParent=t.fParent; |
c72198f1 | 199 | |
5f25234b | 200 | Int_t ndec=t.GetNdecay(); |
201 | if (ndec) | |
6516b62d | 202 | { |
5f25234b | 203 | fDecays=new TObjArray(ndec); |
6516b62d | 204 | fDecays->SetOwner(); |
5f25234b | 205 | for (Int_t it=1; it<=ndec; it++) |
6516b62d | 206 | { |
c72198f1 | 207 | AliTrack* tx=t.GetDecayTrack(it); |
6516b62d | 208 | fDecays->Add(new AliTrack(*tx)); |
209 | } | |
210 | } | |
211 | ||
5f25234b | 212 | Int_t nsig=t.GetNsignals(); |
213 | if (nsig) | |
6516b62d | 214 | { |
5f25234b | 215 | fSignals=new TObjArray(nsig); |
216 | for (Int_t is=1; is<=nsig; is++) | |
6516b62d | 217 | { |
c72198f1 | 218 | AliSignal* sx=t.GetSignal(is); |
6516b62d | 219 | fSignals->Add(sx); |
220 | } | |
221 | } | |
5f25234b | 222 | |
223 | Int_t nhyp=t.GetNhypotheses(); | |
224 | if (nhyp) | |
225 | { | |
226 | fHypotheses=new TObjArray(nhyp); | |
227 | fHypotheses->SetOwner(); | |
228 | for (Int_t ih=1; ih<=nhyp; ih++) | |
229 | { | |
230 | AliTrack* tx=t.GetTrackHypothesis(ih); | |
231 | fHypotheses->Add(new AliTrack(*tx)); | |
232 | } | |
233 | } | |
6516b62d | 234 | } |
235 | /////////////////////////////////////////////////////////////////////////// | |
d88f97cc | 236 | void AliTrack::Reset() |
237 | { | |
35044448 | 238 | // Reset all variables to 0 and delete all auto-generated decay tracks. |
d88f97cc | 239 | fQ=0; |
2693cb4e | 240 | fChi2=0; |
241 | fNdf=0; | |
43bfa5be | 242 | fUserId=0; |
fdbea0ce | 243 | fCode=0; |
5f25234b | 244 | fProb=0; |
d88f97cc | 245 | Double_t a[4]={0,0,0,0}; |
246 | SetVector(a,"sph"); | |
1fbffa23 | 247 | fParent=0; |
d88f97cc | 248 | if (fDecays) |
249 | { | |
d88f97cc | 250 | delete fDecays; |
251 | fDecays=0; | |
252 | } | |
959fbac5 | 253 | if (fSignals) |
254 | { | |
255 | fSignals->Clear(); | |
256 | delete fSignals; | |
257 | fSignals=0; | |
258 | } | |
5f25234b | 259 | if (fHypotheses) |
f531a546 | 260 | { |
5f25234b | 261 | delete fHypotheses; |
262 | fHypotheses=0; | |
f531a546 | 263 | } |
c72198f1 | 264 | if (fBegin) |
265 | { | |
266 | delete fBegin; | |
267 | fBegin=0; | |
268 | } | |
269 | if (fEnd) | |
270 | { | |
271 | delete fEnd; | |
272 | fEnd=0; | |
273 | } | |
274 | if (fImpactXY) | |
275 | { | |
276 | delete fImpactXY; | |
277 | fImpactXY=0; | |
278 | } | |
279 | if (fImpactXZ) | |
280 | { | |
281 | delete fImpactXZ; | |
282 | fImpactXZ=0; | |
283 | } | |
284 | if (fImpactYZ) | |
285 | { | |
286 | delete fImpactYZ; | |
287 | fImpactYZ=0; | |
288 | } | |
289 | if (fClosest) | |
290 | { | |
291 | delete fClosest; | |
292 | fClosest=0; | |
293 | } | |
d88f97cc | 294 | } |
295 | /////////////////////////////////////////////////////////////////////////// | |
296 | void AliTrack::Set3Momentum(Ali3Vector& p) | |
297 | { | |
261c0caf | 298 | // Set the track parameters according to the 3-momentum p. |
299 | // In case the mass was not yet set, the energy is set to correspond to m=0. | |
959fbac5 | 300 | Set3Vector(p); |
261c0caf | 301 | Double_t inv=GetInvariant(); |
302 | if (inv<0) SetMass(0.); | |
d88f97cc | 303 | } |
304 | /////////////////////////////////////////////////////////////////////////// | |
305 | void AliTrack::Set4Momentum(Ali4Vector& p) | |
306 | { | |
307 | // Set the track parameters according to the 4-momentum p | |
308 | Double_t E=p.GetScalar(); | |
959fbac5 | 309 | Double_t dE=p.GetResultError(); |
d88f97cc | 310 | Ali3Vector pv=p.Get3Vector(); |
311 | SetVector(E,pv); | |
959fbac5 | 312 | SetScalarError(dE); |
d88f97cc | 313 | } |
314 | /////////////////////////////////////////////////////////////////////////// | |
959fbac5 | 315 | void AliTrack::SetMass(Double_t m,Double_t dm) |
d88f97cc | 316 | { |
317 | // Set the particle mass | |
959fbac5 | 318 | // The default value for the error dm is 0. |
319 | Double_t inv=pow(m,2); | |
320 | Double_t dinv=fabs(2.*m*dm); | |
321 | SetInvariant(inv,dinv); | |
d88f97cc | 322 | } |
323 | /////////////////////////////////////////////////////////////////////////// | |
324 | void AliTrack::SetCharge(Float_t q) | |
325 | { | |
326 | // Set the particle charge | |
327 | fQ=q; | |
328 | } | |
329 | /////////////////////////////////////////////////////////////////////////// | |
84bb7c66 | 330 | void AliTrack::Data(TString f) |
d88f97cc | 331 | { |
332 | // Provide track information within the coordinate frame f | |
959fbac5 | 333 | Double_t m=GetMass(); |
334 | Double_t dm=GetResultError(); | |
5f25234b | 335 | const char* name=GetName(); |
336 | const char* title=GetTitle(); | |
337 | ||
338 | cout << " *" << ClassName() << "::Data*"; | |
339 | if (strlen(name)) cout << " Name : " << GetName(); | |
340 | if (strlen(title)) cout << " Title : " << GetTitle(); | |
341 | cout << endl; | |
342 | cout << " Id : " << fUserId << " Code : " << fCode | |
343 | << " m : " << m << " dm : " << dm << " Charge : " << fQ | |
344 | << " p : " << GetMomentum() << endl; | |
345 | cout << " Nhypotheses : " << GetNhypotheses() << " Ndecay-tracks : " << GetNdecay() | |
346 | << " Nsignals : " << GetNsignals() << endl; | |
84bb7c66 | 347 | Ali4Vector::Data(f); |
d88f97cc | 348 | } |
349 | /////////////////////////////////////////////////////////////////////////// | |
350 | void AliTrack::List(TString f) | |
351 | { | |
352 | // Provide current track and decay level 1 information within coordinate frame f | |
353 | ||
84bb7c66 | 354 | Data(f); // Information of the current track |
d88f97cc | 355 | |
356 | // Decay products of this track | |
357 | AliTrack* td; | |
5f25234b | 358 | for (Int_t id=1; id<=GetNdecay(); id++) |
d88f97cc | 359 | { |
360 | td=GetDecayTrack(id); | |
361 | if (td) | |
362 | { | |
363 | cout << " ---Level 1 sec. track no. " << id << endl; | |
84bb7c66 | 364 | td->Data(f); |
d88f97cc | 365 | } |
366 | else | |
367 | { | |
5f25234b | 368 | cout << " *AliTrack::List* Error : Empty decay track slot." << endl; |
d88f97cc | 369 | } |
370 | } | |
371 | } | |
372 | /////////////////////////////////////////////////////////////////////////// | |
373 | void AliTrack::ListAll(TString f) | |
374 | { | |
375 | // Provide complete track and decay information within the coordinate frame f | |
376 | ||
84bb7c66 | 377 | Data(f); // Information of the current track |
c72198f1 | 378 | if (fBegin) { cout << " Begin-point :"; fBegin->Data(f); } |
379 | if (fEnd) { cout << " End-point :"; fEnd->Data(f); } | |
5f25234b | 380 | |
381 | Int_t nhyp=GetNhypotheses(); | |
382 | if (nhyp) | |
383 | { | |
384 | cout << " List of the " << nhyp << " track hypotheses : " << endl; | |
385 | for (Int_t ih=1; ih<=nhyp; ih++) | |
386 | { | |
387 | AliTrack* tx=GetTrackHypothesis(ih); | |
388 | if (tx) tx->Data(f); | |
389 | } | |
390 | } | |
391 | ||
392 | Int_t nsig=GetNsignals(); | |
393 | if (nsig) | |
959fbac5 | 394 | { |
d0a8ef71 | 395 | cout << " List of the corresponding slots for the " << nsig |
396 | << " related signals : " << endl; | |
397 | AliPosition r; | |
398 | Int_t nrefs,jslot; | |
399 | TArrayI slotarr; | |
5f25234b | 400 | for (Int_t is=1; is<=nsig; is++) |
401 | { | |
402 | AliSignal* sx=GetSignal(is); | |
d0a8ef71 | 403 | if (sx) |
404 | { | |
405 | nrefs=sx->GetIndices(this,slotarr,0); | |
406 | for (Int_t jref=0; jref<nrefs; jref++) | |
407 | { | |
408 | jslot=slotarr.At(jref); | |
409 | sx->List(jslot); | |
410 | } | |
411 | r=sx->GetPosition(); | |
412 | cout << " Position"; | |
413 | r.Data(f); | |
414 | } | |
5f25234b | 415 | } |
959fbac5 | 416 | } |
d88f97cc | 417 | |
418 | AliTrack* t=this; | |
1c01b4f8 | 419 | Dumps(t,1,f); // Information of all decay products |
d88f97cc | 420 | } |
421 | ////////////////////////////////////////////////////////////////////////// | |
1c01b4f8 | 422 | void AliTrack::Dumps(AliTrack* t,Int_t n,TString f) |
d88f97cc | 423 | { |
424 | // Recursively provide the info of all decay levels of this track | |
425 | AliTrack* td; | |
426 | for (Int_t id=1; id<=t->GetNdecay(); id++) | |
427 | { | |
428 | td=t->GetDecayTrack(id); | |
429 | if (td) | |
430 | { | |
431 | cout << " ---Level " << n << " sec. track no. " << id << endl; | |
84bb7c66 | 432 | td->Data(f); |
5f25234b | 433 | |
434 | Int_t nhyp=td->GetNhypotheses(); | |
435 | if (nhyp) | |
436 | { | |
437 | cout << " List of the " << nhyp << " track hypotheses : " << endl; | |
438 | for (Int_t ih=1; ih<=nhyp; ih++) | |
439 | { | |
440 | AliTrack* tx=td->GetTrackHypothesis(ih); | |
441 | if (tx) tx->Data(f); | |
442 | } | |
443 | } | |
444 | ||
445 | Int_t nsig=td->GetNsignals(); | |
446 | if (nsig) | |
959fbac5 | 447 | { |
5f25234b | 448 | cout << " List of the " << nsig << " related signals : " << endl; |
449 | for (Int_t is=1; is<=nsig; is++) | |
450 | { | |
451 | AliSignal* sx=td->GetSignal(is); | |
452 | if (sx) sx->Data(f); | |
453 | } | |
959fbac5 | 454 | } |
d88f97cc | 455 | |
456 | // Go for next decay level of this decay track recursively | |
1c01b4f8 | 457 | Dumps(td,n+1,f); |
d88f97cc | 458 | } |
459 | else | |
460 | { | |
5f25234b | 461 | cout << " *AliTrack::Dumps* Error : Empty decay track slot." << endl; |
d88f97cc | 462 | } |
463 | } | |
464 | } | |
465 | ////////////////////////////////////////////////////////////////////////// | |
466 | Double_t AliTrack::GetMomentum() | |
467 | { | |
959fbac5 | 468 | // Provide the value of the track 3-momentum. |
469 | // The error can be obtained by invoking GetResultError() after | |
470 | // invokation of GetMomentum(). | |
959fbac5 | 471 | Double_t norm=fV.GetNorm(); |
d071d629 | 472 | fDresult=fV.GetResultError(); |
959fbac5 | 473 | return norm; |
d88f97cc | 474 | } |
475 | /////////////////////////////////////////////////////////////////////////// | |
261c0caf | 476 | Ali3Vector AliTrack::Get3Momentum() const |
d88f97cc | 477 | { |
478 | // Provide the track 3-momentum | |
479 | return (Ali3Vector)Get3Vector(); | |
480 | } | |
481 | /////////////////////////////////////////////////////////////////////////// | |
482 | Double_t AliTrack::GetMass() | |
483 | { | |
959fbac5 | 484 | // Provide the particle mass. |
485 | // The error can be obtained by invoking GetResultError() after | |
486 | // invokation of GetMass(). | |
487 | Double_t inv=GetInvariant(); | |
488 | Double_t dinv=GetResultError(); | |
489 | Double_t dm=0; | |
490 | if (inv >= 0) | |
491 | { | |
492 | Double_t m=sqrt(inv); | |
493 | if (m) dm=dinv/(2.*m); | |
494 | fDresult=dm; | |
495 | return m; | |
496 | } | |
497 | else | |
498 | { | |
499 | cout << "*AliTrack::GetMass* Unphysical situation m**2 = " << inv << endl; | |
500 | cout << " Value 0 will be returned." << endl; | |
501 | fDresult=dm; | |
502 | return 0; | |
503 | } | |
d88f97cc | 504 | } |
505 | /////////////////////////////////////////////////////////////////////////// | |
261c0caf | 506 | Float_t AliTrack::GetCharge() const |
d88f97cc | 507 | { |
508 | // Provide the particle charge | |
509 | return fQ; | |
510 | } | |
511 | /////////////////////////////////////////////////////////////////////////// | |
512 | Double_t AliTrack::GetEnergy() | |
513 | { | |
959fbac5 | 514 | // Provide the particle's energy. |
515 | // The error can be obtained by invoking GetResultError() after | |
516 | // invokation of GetEnergy(). | |
517 | Double_t E=GetScalar(); | |
518 | if (E>0) | |
519 | { | |
520 | return E; | |
521 | } | |
522 | else | |
523 | { | |
524 | cout << "*AliTrack::GetEnergy* Unphysical situation E = " << E << endl; | |
525 | cout << " Value 0 will be returned." << endl; | |
526 | return 0; | |
527 | } | |
d88f97cc | 528 | } |
529 | /////////////////////////////////////////////////////////////////////////// | |
530 | void AliTrack::Decay(Double_t m1,Double_t m2,Double_t thcms,Double_t phicms) | |
531 | { | |
532 | // Perform 2-body decay of current track | |
533 | // m1 : mass of decay product 1 | |
534 | // m2 : mass of decay product 2 | |
535 | // thcms : cms theta decay angle (in rad.) of m1 | |
536 | // phicms : cms phi decay angle (in rad.) of m1 | |
537 | ||
959fbac5 | 538 | Double_t M=GetMass(); |
d88f97cc | 539 | |
540 | // Compute the 4-momenta of the decay products in the cms | |
541 | // Note : p2=p1=pnorm for a 2-body decay | |
959fbac5 | 542 | Double_t e1=0; |
543 | if (M) e1=((M*M)+(m1*m1)-(m2*m2))/(2.*M); | |
544 | Double_t e2=0; | |
545 | if (M) e2=((M*M)+(m2*m2)-(m1*m1))/(2.*M); | |
d88f97cc | 546 | Double_t pnorm=(e1*e1)-(m1*m1); |
547 | if (pnorm>0.) | |
548 | { | |
549 | pnorm=sqrt(pnorm); | |
550 | } | |
551 | else | |
552 | { | |
553 | pnorm=0; | |
554 | } | |
555 | ||
556 | Double_t a[3]; | |
557 | a[0]=pnorm; | |
558 | a[1]=thcms; | |
559 | a[2]=phicms; | |
560 | Ali3Vector p; | |
561 | p.SetVector(a,"sph"); | |
562 | ||
563 | Ali4Vector pprim1; | |
564 | pprim1.SetVector(e1,p); | |
959fbac5 | 565 | pprim1.SetInvariant(m1*m1); |
d88f97cc | 566 | |
567 | Ali4Vector pprim2; | |
568 | p*=-1; | |
569 | pprim2.SetVector(e2,p); | |
959fbac5 | 570 | pprim2.SetInvariant(m2*m2); |
d88f97cc | 571 | |
572 | // Determine boost parameters from the parent particle | |
959fbac5 | 573 | Double_t E=GetEnergy(); |
d88f97cc | 574 | p=Get3Vector(); |
575 | Ali4Vector pmu; | |
576 | pmu.SetVector(E,p); | |
577 | ||
578 | AliBoost q; | |
579 | q.Set4Momentum(pmu); | |
580 | ||
581 | Ali4Vector p1=q.Inverse(pprim1); // Boost decay product 1 | |
582 | Ali4Vector p2=q.Inverse(pprim2); // Boost decay product 2 | |
583 | ||
584 | // Enter the boosted data into the decay tracks array | |
585 | if (fDecays) | |
586 | { | |
d88f97cc | 587 | delete fDecays; |
6516b62d | 588 | fDecays=0; |
d88f97cc | 589 | } |
5f25234b | 590 | fDecays=new TObjArray(2); |
6516b62d | 591 | fDecays->SetOwner(); |
d88f97cc | 592 | |
593 | fDecays->Add(new AliTrack); | |
594 | ((AliTrack*)fDecays->At(0))->Set4Momentum(p1); | |
959fbac5 | 595 | ((AliTrack*)fDecays->At(0))->SetMass(m1); |
d88f97cc | 596 | fDecays->Add(new AliTrack); |
597 | ((AliTrack*)fDecays->At(1))->Set4Momentum(p2); | |
d88f97cc | 598 | ((AliTrack*)fDecays->At(1))->SetMass(m2); |
599 | } | |
600 | /////////////////////////////////////////////////////////////////////////// | |
261c0caf | 601 | Int_t AliTrack::GetNdecay() const |
d88f97cc | 602 | { |
603 | // Provide the number of decay produced tracks | |
5f25234b | 604 | Int_t ndec=0; |
605 | if (fDecays) ndec=fDecays->GetEntries(); | |
606 | return ndec; | |
d88f97cc | 607 | } |
608 | /////////////////////////////////////////////////////////////////////////// | |
261c0caf | 609 | AliTrack* AliTrack::GetDecayTrack(Int_t j) const |
d88f97cc | 610 | { |
611 | // Provide decay produced track number j | |
612 | // Note : j=1 denotes the first decay track | |
6516b62d | 613 | if (!fDecays) |
d88f97cc | 614 | { |
6516b62d | 615 | cout << " *AliTrack::GetDecayTrack* No tracks present." << endl; |
616 | return 0; | |
d88f97cc | 617 | } |
618 | else | |
619 | { | |
5f25234b | 620 | if ((j >= 1) && (j <= GetNdecay())) |
6516b62d | 621 | { |
622 | return (AliTrack*)fDecays->At(j-1); | |
623 | } | |
624 | else | |
625 | { | |
626 | cout << " *AliTrack* decay track number : " << j << " out of range." | |
5f25234b | 627 | << " Ndec = " << GetNdecay() << endl; |
6516b62d | 628 | return 0; |
629 | } | |
d88f97cc | 630 | } |
631 | } | |
632 | /////////////////////////////////////////////////////////////////////////// | |
5f25234b | 633 | void AliTrack::RemoveDecays() |
634 | { | |
635 | // Remove all decay tracks from this track. | |
636 | if (fDecays) | |
637 | { | |
638 | delete fDecays; | |
639 | fDecays=0; | |
640 | } | |
641 | } | |
642 | /////////////////////////////////////////////////////////////////////////// | |
959fbac5 | 643 | void AliTrack::AddSignal(AliSignal& s) |
644 | { | |
645 | // Relate an AliSignal object to this track. | |
5f25234b | 646 | if (!fSignals) fSignals=new TObjArray(1); |
647 | ||
648 | // Check if this signal is already stored for this track | |
649 | Int_t nsig=GetNsignals(); | |
650 | for (Int_t i=0; i<nsig; i++) | |
651 | { | |
652 | if (&s==fSignals->At(i)) return; | |
653 | } | |
654 | ||
959fbac5 | 655 | fSignals->Add(&s); |
656 | } | |
657 | /////////////////////////////////////////////////////////////////////////// | |
658 | void AliTrack::RemoveSignal(AliSignal& s) | |
659 | { | |
5f25234b | 660 | // Remove related AliSignal object from this track. |
959fbac5 | 661 | if (fSignals) |
662 | { | |
663 | AliSignal* test=(AliSignal*)fSignals->Remove(&s); | |
5f25234b | 664 | if (test) fSignals->Compress(); |
665 | } | |
666 | } | |
667 | /////////////////////////////////////////////////////////////////////////// | |
668 | void AliTrack::RemoveSignals() | |
669 | { | |
670 | // Remove all related AliSignal objects from this track. | |
671 | if (fSignals) | |
672 | { | |
673 | fSignals->Clear(); | |
674 | delete fSignals; | |
675 | fSignals=0; | |
959fbac5 | 676 | } |
677 | } | |
678 | /////////////////////////////////////////////////////////////////////////// | |
261c0caf | 679 | Int_t AliTrack::GetNsignals() const |
959fbac5 | 680 | { |
681 | // Provide the number of related AliSignals. | |
5f25234b | 682 | Int_t nsig=0; |
683 | if (fSignals) nsig=fSignals->GetEntries(); | |
684 | return nsig; | |
959fbac5 | 685 | } |
686 | /////////////////////////////////////////////////////////////////////////// | |
261c0caf | 687 | AliSignal* AliTrack::GetSignal(Int_t j) const |
959fbac5 | 688 | { |
689 | // Provide the related AliSignal number j. | |
690 | // Note : j=1 denotes the first signal. | |
6516b62d | 691 | if (!fSignals) |
959fbac5 | 692 | { |
6516b62d | 693 | cout << " *AliTrack::GetSignal* No signals present." << endl; |
694 | return 0; | |
959fbac5 | 695 | } |
696 | else | |
697 | { | |
5f25234b | 698 | if ((j >= 1) && (j <= GetNsignals())) |
6516b62d | 699 | { |
700 | return (AliSignal*)fSignals->At(j-1); | |
701 | } | |
702 | else | |
703 | { | |
704 | cout << " *AliTrack* signal number : " << j << " out of range." | |
5f25234b | 705 | << " Nsig = " << GetNsignals() << endl; |
6516b62d | 706 | return 0; |
707 | } | |
959fbac5 | 708 | } |
709 | } | |
710 | /////////////////////////////////////////////////////////////////////////// | |
5f25234b | 711 | void AliTrack::AddTrackHypothesis(AliTrack& t) |
959fbac5 | 712 | { |
5f25234b | 713 | // Relate a track hypothesis to this track. |
714 | // Note : a private copy of the input track will be made via the Clone() | |
715 | // facility. | |
716 | if (!fHypotheses) | |
c72198f1 | 717 | { |
5f25234b | 718 | fHypotheses=new TObjArray(1); |
719 | fHypotheses->SetOwner(); | |
c72198f1 | 720 | } |
5f25234b | 721 | fHypotheses->Add(t.Clone()); |
959fbac5 | 722 | } |
723 | /////////////////////////////////////////////////////////////////////////// | |
5f25234b | 724 | void AliTrack::AddTrackHypothesis(Double_t prob,Double_t m,Double_t dm) |
959fbac5 | 725 | { |
5f25234b | 726 | // Add a track hypothesis by explicitly setting the mass and probability. |
727 | // This will affect e.g. the hypothesis track's energy, since the momentum | |
728 | // and all other attributes will be copied from the current track. | |
729 | // | |
730 | // Input arguments : | |
731 | // ----------------- | |
732 | // prob=probalility m=mass value dm=error on the mass value. | |
733 | // The default value for the mass error dm is 0. | |
734 | ||
735 | AliTrack t(*this); | |
736 | t.RemoveDecays(); | |
737 | t.RemoveTrackHypotheses(); | |
738 | t.RemoveSignals(); | |
739 | t.SetTitle("Mass hypothesis"); | |
740 | t.SetMass(m,dm); | |
741 | t.SetProb(prob); | |
742 | AddTrackHypothesis(t); | |
959fbac5 | 743 | } |
744 | /////////////////////////////////////////////////////////////////////////// | |
5f25234b | 745 | void AliTrack::RemoveTrackHypothesis(AliTrack& t) |
959fbac5 | 746 | { |
5f25234b | 747 | // Remove the specified track hypothesis from this track. |
748 | if (fHypotheses) | |
c72198f1 | 749 | { |
5f25234b | 750 | AliTrack* test=(AliTrack*)fHypotheses->Remove(&t); |
751 | if (test) fHypotheses->Compress(); | |
c72198f1 | 752 | } |
959fbac5 | 753 | } |
754 | /////////////////////////////////////////////////////////////////////////// | |
5f25234b | 755 | void AliTrack::RemoveTrackHypotheses() |
959fbac5 | 756 | { |
5f25234b | 757 | // Remove all track hypotheses from this track. |
758 | if (fHypotheses) | |
759 | { | |
760 | delete fHypotheses; | |
761 | fHypotheses=0; | |
762 | } | |
f531a546 | 763 | } |
764 | /////////////////////////////////////////////////////////////////////////// | |
261c0caf | 765 | Int_t AliTrack::GetNhypotheses() const |
f531a546 | 766 | { |
5f25234b | 767 | // Provide the number of track hypotheses. |
768 | Int_t nhyp=0; | |
769 | if (fHypotheses) nhyp=fHypotheses->GetEntries(); | |
770 | return nhyp; | |
f531a546 | 771 | } |
772 | /////////////////////////////////////////////////////////////////////////// | |
261c0caf | 773 | AliTrack* AliTrack::GetTrackHypothesis(Int_t j) const |
f531a546 | 774 | { |
5f25234b | 775 | // Provide the j-th track hypothesis. |
776 | // Note : j=1 denotes the first hypothesis. | |
f531a546 | 777 | // Default : j=0 ==> Hypothesis with highest probability. |
f531a546 | 778 | |
5f25234b | 779 | if (!fHypotheses) return 0; |
780 | ||
781 | Int_t nhyp=GetNhypotheses(); | |
f531a546 | 782 | |
783 | // Check validity of index j | |
5f25234b | 784 | if (j<0 || j>nhyp) |
f531a546 | 785 | { |
5f25234b | 786 | cout << " *AliTrack* hypothesis number : " << j << " out of range." |
787 | << " Nhyp = " << nhyp << endl; | |
788 | return 0; | |
789 | } | |
f531a546 | 790 | |
5f25234b | 791 | AliTrack* t=0; |
792 | ||
793 | if (j==0) // Provide track hypothesis with highest probability | |
f531a546 | 794 | { |
5f25234b | 795 | Float_t prob=0; |
796 | t=(AliTrack*)fHypotheses->At(0); | |
797 | if (t) prob=t->GetProb(); | |
798 | Float_t probx=0; | |
799 | for (Int_t ih=1; ih<nhyp; ih++) | |
f531a546 | 800 | { |
5f25234b | 801 | AliTrack* tx=(AliTrack*)fHypotheses->At(ih); |
802 | if (tx) | |
f531a546 | 803 | { |
5f25234b | 804 | probx=tx->GetProb(); |
805 | if (probx > prob) t=tx; | |
f531a546 | 806 | } |
807 | } | |
5f25234b | 808 | return t; |
809 | } | |
810 | else // Provide requested j-th track hypothesis | |
811 | { | |
812 | return (AliTrack*)fHypotheses->At(j-1); | |
f531a546 | 813 | } |
f531a546 | 814 | } |
815 | /////////////////////////////////////////////////////////////////////////// | |
5f25234b | 816 | void AliTrack::SetBeginPoint(AliPosition& p) |
f531a546 | 817 | { |
5f25234b | 818 | // Store the position of the track begin-point. |
819 | if (!fBegin) | |
f531a546 | 820 | { |
5f25234b | 821 | fBegin=new AliPositionObj(p); |
f531a546 | 822 | } |
5f25234b | 823 | else |
f531a546 | 824 | { |
5f25234b | 825 | fBegin->Load(p); |
f531a546 | 826 | } |
f531a546 | 827 | } |
828 | /////////////////////////////////////////////////////////////////////////// | |
5f25234b | 829 | AliPosition* AliTrack::GetBeginPoint() |
f531a546 | 830 | { |
5f25234b | 831 | // Provide the position of the track begin-point. |
832 | return fBegin; | |
833 | } | |
834 | /////////////////////////////////////////////////////////////////////////// | |
835 | void AliTrack::SetEndPoint(AliPosition& p) | |
836 | { | |
837 | // Store the position of the track end-point. | |
838 | if (!fEnd) | |
f531a546 | 839 | { |
5f25234b | 840 | fEnd=new AliPositionObj(p); |
f531a546 | 841 | } |
842 | else | |
843 | { | |
5f25234b | 844 | fEnd->Load(p); |
f531a546 | 845 | } |
846 | } | |
847 | /////////////////////////////////////////////////////////////////////////// | |
5f25234b | 848 | AliPosition* AliTrack::GetEndPoint() |
849 | { | |
850 | // Provide the position of the track end-point. | |
851 | return fEnd; | |
852 | } | |
853 | /////////////////////////////////////////////////////////////////////////// | |
854 | void AliTrack::SetMass() | |
f531a546 | 855 | { |
5f25234b | 856 | // Set the mass and error to the value of the hypothesis with highest prob. |
f531a546 | 857 | |
5f25234b | 858 | Double_t m=0,dm=0; |
859 | ||
860 | // Select mass hypothesis with highest probability | |
861 | AliTrack* t=GetTrackHypothesis(0); | |
862 | if (t) | |
f531a546 | 863 | { |
5f25234b | 864 | m=t->GetMass(); |
865 | dm=t->GetResultError(); | |
866 | SetMass(m,dm); | |
f531a546 | 867 | } |
868 | else | |
869 | { | |
5f25234b | 870 | cout << " *AliTrack::SetMass()* No hypothesis present => No action." << endl; |
f531a546 | 871 | } |
872 | } | |
873 | /////////////////////////////////////////////////////////////////////////// | |
d071d629 | 874 | Double_t AliTrack::GetPt() |
875 | { | |
876 | // Provide trans. momentum value w.r.t. z-axis. | |
877 | // The error on the value can be obtained by GetResultError() | |
878 | // after invokation of GetPt(). | |
879 | Ali3Vector v; | |
880 | v=GetVecTrans(); | |
881 | Double_t norm=v.GetNorm(); | |
882 | fDresult=v.GetResultError(); | |
883 | ||
884 | return norm; | |
885 | } | |
886 | /////////////////////////////////////////////////////////////////////////// | |
887 | Double_t AliTrack::GetPl() | |
888 | { | |
889 | // Provide long. momentum value w.r.t. z-axis. | |
8adaf597 | 890 | // Note : the returned value can also be negative. |
d071d629 | 891 | // The error on the value can be obtained by GetResultError() |
892 | // after invokation of GetPl(). | |
893 | Ali3Vector v; | |
894 | v=GetVecLong(); | |
8adaf597 | 895 | |
896 | Double_t pl=v.GetNorm(); | |
d071d629 | 897 | fDresult=v.GetResultError(); |
898 | ||
8adaf597 | 899 | Double_t a[3]; |
900 | v.GetVector(a,"sph"); | |
901 | if (cos(a[1])<0) pl=-pl; | |
902 | ||
903 | return pl; | |
d071d629 | 904 | } |
905 | /////////////////////////////////////////////////////////////////////////// | |
906 | Double_t AliTrack::GetEt() | |
907 | { | |
908 | // Provide trans. energy value w.r.t. z-axis. | |
909 | // The error on the value can be obtained by GetResultError() | |
910 | // after invokation of GetEt(). | |
911 | Double_t et=GetScaTrans(); | |
912 | ||
913 | return et; | |
914 | } | |
915 | /////////////////////////////////////////////////////////////////////////// | |
916 | Double_t AliTrack::GetEl() | |
917 | { | |
918 | // Provide long. energy value w.r.t. z-axis. | |
8adaf597 | 919 | // Note : the returned value can also be negative. |
d071d629 | 920 | // The error on the value can be obtained by GetResultError() |
921 | // after invokation of GetEl(). | |
922 | Double_t el=GetScaLong(); | |
923 | ||
924 | return el; | |
925 | } | |
926 | /////////////////////////////////////////////////////////////////////////// | |
927 | Double_t AliTrack::GetMt() | |
928 | { | |
929 | // Provide transverse mass value w.r.t. z-axis. | |
930 | // The error on the value can be obtained by GetResultError() | |
931 | // after invokation of GetMt(). | |
932 | Double_t pt=GetPt(); | |
933 | Double_t dpt=GetResultError(); | |
934 | Double_t m=GetMass(); | |
935 | Double_t dm=GetResultError(); | |
936 | ||
937 | Double_t mt=sqrt(pt*pt+m*m); | |
938 | Double_t dmt2=0; | |
939 | if (mt) dmt2=(pow((pt*dpt),2)+pow((m*dm),2))/(mt*mt); | |
940 | ||
941 | fDresult=sqrt(dmt2); | |
942 | return mt; | |
943 | } | |
944 | /////////////////////////////////////////////////////////////////////////// | |
8adaf597 | 945 | Double_t AliTrack::GetRapidity() |
946 | { | |
947 | // Provide rapidity value w.r.t. z-axis. | |
948 | // The error on the value can be obtained by GetResultError() | |
949 | // after invokation of GetRapidity(). | |
950 | // Note : Also GetPseudoRapidity() is available since this class is | |
951 | // derived from Ali4Vector. | |
952 | Double_t e=GetEnergy(); | |
953 | Double_t de=GetResultError(); | |
954 | Double_t pl=GetPl(); | |
955 | Double_t dpl=GetResultError(); | |
956 | Double_t sum=e+pl; | |
957 | Double_t dif=e-pl; | |
958 | ||
959 | Double_t y=9999,dy2=0; | |
960 | if (sum && dif) y=0.5*log(sum/dif); | |
961 | ||
962 | if (sum*dif) dy2=(1./(sum*dif))*(pow((pl*de),2)+pow((e*dpl),2)); | |
963 | ||
964 | fDresult=sqrt(dy2); | |
965 | return y; | |
966 | } | |
967 | /////////////////////////////////////////////////////////////////////////// | |
c72198f1 | 968 | void AliTrack::SetImpactPoint(AliPosition& p,TString q) |
43bfa5be | 969 | { |
970 | // Store the position of the impact-point in the plane "q=0". | |
971 | // Here q denotes one of the axes X, Y or Z. | |
972 | // Note : The character to denote the axis may be entered in lower or | |
973 | // in uppercase. | |
974 | Int_t axis=0; | |
975 | if (q=="x" || q=="X") axis=1; | |
976 | if (q=="y" || q=="Y") axis=2; | |
977 | if (q=="z" || q=="Z") axis=3; | |
978 | ||
979 | switch (axis) | |
980 | { | |
981 | case 1: // Impact-point in the plane X=0 | |
c72198f1 | 982 | if (!fImpactYZ) |
983 | { | |
984 | fImpactYZ=new AliPositionObj(p); | |
985 | } | |
986 | else | |
987 | { | |
988 | fImpactYZ->Load(p); | |
989 | } | |
43bfa5be | 990 | break; |
991 | ||
992 | case 2: // Impact-point in the plane Y=0 | |
c72198f1 | 993 | if (!fImpactXZ) |
994 | { | |
995 | fImpactXZ=new AliPositionObj(p); | |
996 | } | |
997 | else | |
998 | { | |
999 | fImpactXZ->Load(p); | |
1000 | } | |
43bfa5be | 1001 | break; |
1002 | ||
1003 | case 3: // Impact-point in the plane Z=0 | |
c72198f1 | 1004 | if (!fImpactXY) |
1005 | { | |
1006 | fImpactXY=new AliPositionObj(p); | |
1007 | } | |
1008 | else | |
1009 | { | |
1010 | fImpactXY->Load(p); | |
1011 | } | |
43bfa5be | 1012 | break; |
1013 | ||
1014 | default: // Unsupported axis | |
1015 | cout << "*AliTrack::SetImpactPoint* Unsupported axis : " << q << endl | |
1016 | << " Possible axes are 'X', 'Y' and 'Z'." << endl; | |
1017 | break; | |
1018 | } | |
1019 | } | |
1020 | /////////////////////////////////////////////////////////////////////////// | |
c72198f1 | 1021 | AliPosition* AliTrack::GetImpactPoint(TString q) |
43bfa5be | 1022 | { |
1023 | // Provide the position of the impact-point in the plane "q=0". | |
1024 | // Here q denotes one of the axes X, Y or Z. | |
1025 | // Note : The character to denote the axis may be entered in lower or | |
1026 | // in uppercase. | |
43bfa5be | 1027 | Int_t axis=0; |
1028 | if (q=="x" || q=="X") axis=1; | |
1029 | if (q=="y" || q=="Y") axis=2; | |
1030 | if (q=="z" || q=="Z") axis=3; | |
1031 | ||
1032 | switch (axis) | |
1033 | { | |
1034 | case 1: // Impact-point in the plane X=0 | |
1035 | return fImpactYZ; | |
1036 | ||
1037 | case 2: // Impact-point in the plane Y=0 | |
1038 | return fImpactXZ; | |
1039 | ||
1040 | case 3: // Impact-point in the plane Z=0 | |
1041 | return fImpactXY; | |
1042 | ||
1043 | default: // Unsupported axis | |
1044 | cout << "*AliTrack::GetImpactPoint* Unsupported axis : " << q << endl | |
1045 | << " Possible axes are 'X', 'Y' and 'Z'." << endl; | |
c72198f1 | 1046 | return 0; |
43bfa5be | 1047 | } |
1048 | } | |
1049 | /////////////////////////////////////////////////////////////////////////// | |
1050 | void AliTrack::SetId(Int_t id) | |
1051 | { | |
fdbea0ce | 1052 | // Set a user defined unique identifier for this track. |
43bfa5be | 1053 | fUserId=id; |
1054 | } | |
1055 | /////////////////////////////////////////////////////////////////////////// | |
261c0caf | 1056 | Int_t AliTrack::GetId() const |
43bfa5be | 1057 | { |
fdbea0ce | 1058 | // Provide the user defined unique identifier of this track. |
43bfa5be | 1059 | return fUserId; |
1060 | } | |
1061 | /////////////////////////////////////////////////////////////////////////// | |
c72198f1 | 1062 | void AliTrack::SetClosestPoint(AliPosition& p) |
43bfa5be | 1063 | { |
1064 | // Set position p as the point of closest approach w.r.t. some reference | |
c72198f1 | 1065 | if (!fClosest) |
1066 | { | |
1067 | fClosest=new AliPositionObj(p); | |
1068 | } | |
1069 | else | |
1070 | { | |
1071 | fClosest->Load(p); | |
1072 | } | |
43bfa5be | 1073 | } |
1074 | /////////////////////////////////////////////////////////////////////////// | |
c72198f1 | 1075 | AliPosition* AliTrack::GetClosestPoint() |
43bfa5be | 1076 | { |
1077 | // Provide the point of closest approach w.r.t. some reference | |
1078 | return fClosest; | |
1079 | } | |
1080 | /////////////////////////////////////////////////////////////////////////// | |
2693cb4e | 1081 | void AliTrack::SetChi2(Float_t chi2) |
1082 | { | |
1083 | // Set the chi-squared value of the track fit. | |
1084 | if (chi2<0) | |
1085 | { | |
1086 | cout << " *AliTrack::SetChi2* Invalid chi2 value : " << chi2 << endl; | |
1087 | } | |
1088 | else | |
1089 | { | |
1090 | fChi2=chi2; | |
1091 | } | |
1092 | } | |
1093 | /////////////////////////////////////////////////////////////////////////// | |
1094 | void AliTrack::SetNdf(Int_t ndf) | |
1095 | { | |
1096 | // Set the number of degrees of freedom for the track fit. | |
1097 | if (ndf<0) | |
1098 | { | |
1099 | cout << " *AliTrack::SetNdf* Invalid ndf value : " << ndf << endl; | |
1100 | } | |
1101 | else | |
1102 | { | |
1103 | fNdf=ndf; | |
1104 | } | |
1105 | } | |
1106 | /////////////////////////////////////////////////////////////////////////// | |
261c0caf | 1107 | Float_t AliTrack::GetChi2() const |
2693cb4e | 1108 | { |
1109 | // Provide the chi-squared value of the track fit. | |
1110 | return fChi2; | |
1111 | } | |
1112 | /////////////////////////////////////////////////////////////////////////// | |
261c0caf | 1113 | Int_t AliTrack::GetNdf() const |
2693cb4e | 1114 | { |
1115 | // Provide the number of degrees of freedom for the track fit. | |
1116 | return fNdf; | |
1117 | } | |
1118 | /////////////////////////////////////////////////////////////////////////// | |
fdbea0ce | 1119 | void AliTrack::SetParticleCode(Int_t code) |
1120 | { | |
1121 | // Set the user defined particle id code (e.g. the PDF convention). | |
1122 | fCode=code; | |
1123 | } | |
1124 | /////////////////////////////////////////////////////////////////////////// | |
261c0caf | 1125 | Int_t AliTrack::GetParticleCode() const |
fdbea0ce | 1126 | { |
1127 | // Provide the user defined particle id code. | |
1128 | return fCode; | |
1129 | } | |
1130 | /////////////////////////////////////////////////////////////////////////// | |
1fbffa23 | 1131 | void AliTrack::SetParentTrack(AliTrack* t) |
1132 | { | |
1133 | // Set pointer to the parent track. | |
1134 | fParent=t; | |
1135 | } | |
1136 | /////////////////////////////////////////////////////////////////////////// | |
1137 | AliTrack* AliTrack::GetParentTrack() | |
1138 | { | |
1139 | // Provide pointer to the parent track. | |
1140 | return fParent; | |
1141 | } | |
1142 | /////////////////////////////////////////////////////////////////////////// | |
5f25234b | 1143 | void AliTrack::SetProb(Double_t prob) |
1144 | { | |
1145 | // Set hypothesis probability for this track. | |
1146 | fProb=prob; | |
1147 | } | |
1148 | /////////////////////////////////////////////////////////////////////////// | |
261c0caf | 1149 | Float_t AliTrack::GetProb() const |
5f25234b | 1150 | { |
1151 | // Provide the hypothesis probability for this track. | |
1152 | return fProb; | |
1153 | } | |
1154 | /////////////////////////////////////////////////////////////////////////// | |
261c0caf | 1155 | TObject* AliTrack::Clone(const char* name) const |
5f25234b | 1156 | { |
1157 | // Make a deep copy of the current object and provide the pointer to the copy. | |
1158 | // This memberfunction enables automatic creation of new objects of the | |
1159 | // correct type depending on the object type, a feature which may be very useful | |
1160 | // for containers when adding objects in case the container owns the objects. | |
1161 | // This feature allows e.g. AliJet to store either AliTrack objects or | |
1162 | // objects derived from AliTrack via the AddTrack memberfunction, provided | |
1163 | // these derived classes also have a proper Clone memberfunction. | |
1164 | ||
1165 | AliTrack* trk=new AliTrack(*this); | |
1166 | if (name) | |
1167 | { | |
1168 | if (strlen(name)) trk->SetName(name); | |
1169 | } | |
1170 | return trk; | |
1171 | } | |
1172 | /////////////////////////////////////////////////////////////////////////// |