1 /**************************************************************************
2 * Copyright(c) 1998-2007, ALICE Experiment at CERN, All rights reserved. *
4 * Author: The ALICE Off-line Project. *
5 * Contributors are mentioned in the code where appropriate. *
7 * Permission to use, copy, modify and distribute this software and its *
8 * documentation strictly for non-commercial purposes is hereby granted *
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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 **************************************************************************/
18 //-------------------------------------------------------------------------
19 // AOD track base class
20 // Base class for Analysis Object Data
22 // Author: Markus Oldenburg, CERN
23 // Inheritance from AliVVertex: A. Dainese
24 //-------------------------------------------------------------------------
26 #include "AliAODVertex.h"
27 #include "AliAODTrack.h"
29 ClassImp(AliAODVertex)
31 //______________________________________________________________________________
32 AliAODVertex::AliAODVertex() :
45 // default constructor
47 fPosition[0] = fPosition[1] = fPosition[2] = -999.;
50 //______________________________________________________________________________
51 AliAODVertex::AliAODVertex(const Double_t position[3],
52 const Double_t covMatrix[6],
59 fChi2perNDF(chi2perNDF),
72 SetPosition(position);
73 if (covMatrix) SetCovMatrix(covMatrix);
77 //______________________________________________________________________________
78 AliAODVertex::AliAODVertex(const Float_t position[3],
79 const Float_t covMatrix[6],
87 fChi2perNDF(chi2perNDF),
100 SetPosition(position);
101 if (covMatrix) SetCovMatrix(covMatrix);
105 //______________________________________________________________________________
106 AliAODVertex::AliAODVertex(const Double_t position[3],
111 fChi2perNDF(chi2perNDF),
122 // constructor without covariance matrix
124 SetPosition(position);
128 //______________________________________________________________________________
129 AliAODVertex::AliAODVertex(const Float_t position[3],
131 Char_t vtype, Int_t nprong) :
133 fChi2perNDF(chi2perNDF),
144 // constructor without covariance matrix
146 SetPosition(position);
150 //______________________________________________________________________________
151 AliAODVertex::~AliAODVertex()
156 if (fNprong > 0) delete[] fProngs;
159 //______________________________________________________________________________
160 AliAODVertex::AliAODVertex(const AliAODVertex& vtx) :
162 fChi2perNDF(vtx.fChi2perNDF),
165 fNprong(vtx.fNprong),
166 fIprong(vtx.fIprong),
167 fNContributors(vtx.fNContributors),
169 fParent(vtx.fParent),
170 fDaughters(vtx.fDaughters),
175 for (int i = 0; i < 3; i++)
176 fPosition[i] = vtx.fPosition[i];
178 if (vtx.fCovMatrix) fCovMatrix=new AliAODRedCov<3>(*vtx.fCovMatrix);
180 for (int i = 0; i < fNprong; i++) {
181 fProngs[i] = vtx.fProngs[i];
185 //______________________________________________________________________________
186 AliAODVertex& AliAODVertex::operator=(const AliAODVertex& vtx)
188 // Assignment operator
192 AliVVertex::operator=(vtx);
195 for (int i = 0; i < 3; i++)
196 fPosition[i] = vtx.fPosition[i];
198 fChi2perNDF = vtx.fChi2perNDF;
205 if (vtx.fCovMatrix) fCovMatrix=new AliAODRedCov<3>(*vtx.fCovMatrix);
208 fParent = vtx.fParent;
209 fDaughters = vtx.fDaughters;
210 fNprong = vtx.fNprong;
211 fIprong = vtx.fIprong;
214 for (int i = 0; i < fNprong; i++) {
215 fProngs[i] = vtx.fProngs[i];
222 //______________________________________________________________________________
223 void AliAODVertex::AddDaughter(TObject *daughter)
225 // Add reference to daughter track
227 if (fDaughters.GetEntries()==0) {
228 TRefArray* arr = &fDaughters;
229 new(arr)TRefArray(TProcessID::GetProcessWithUID(daughter));
231 fDaughters.Add(daughter);
233 if (fIprong < fNprong) {
234 fProngs[fIprong++] = daughter;
236 AliWarning("Number of daughters out of range !\n");
243 //______________________________________________________________________________
244 template <class T> void AliAODVertex::GetSigmaXYZ(T sigma[3]) const
246 // Return errors on vertex position in thrust frame
249 sigma[0]=fCovMatrix[3]; //GetCovXZ
250 sigma[1]=fCovMatrix[4]; //GetCovYZ
251 sigma[2]=fCovMatrix[5]; //GetCovZZ
253 sigma[0]=sigma[1]=sigma[2]=-999.;
256 for (int i = 0, j = 6; i < 3; i++) {
258 sigma[2-i] = fCovMatrix ? TMath::Sqrt(fCovMatrix[j]) : -999.;
263 //______________________________________________________________________________
264 Int_t AliAODVertex::GetNContributors() const
266 // Returns the number of tracks used to fit this vertex.
269 if (!strcmp(GetTitle(), "vertexer: 3D")) {
270 cont = fNContributors;
272 for (Int_t iDaug = 0; iDaug < GetNDaughters(); iDaug++) {
273 AliAODTrack* aodT = dynamic_cast<AliAODTrack*>(fDaughters.At(iDaug));
275 if (aodT->GetUsedForPrimVtxFit()) cont++;
281 //______________________________________________________________________________
282 Bool_t AliAODVertex::HasDaughter(TObject *daughter) const
284 // Checks if the given daughter (particle) is part of this vertex.
286 TRefArrayIter iter(&fDaughters);
287 while (TObject *daugh = iter.Next()) {
288 if (daugh == daughter) return kTRUE;
293 for (int i = 0; i < fNprong; i++) {
294 if (fProngs[i].GetObject() == daughter) has = kTRUE;
300 //______________________________________________________________________________
301 Double_t AliAODVertex::RotatedCovMatrixXX(Double_t phi, Double_t theta) const
303 // XX term of covariance matrix after rotation by phi around z-axis
304 // and, then, by theta around new y-axis
307 //AliFatal("Covariance matrix not set");
311 Double_t covMatrix[6];
313 GetCovMatrix(covMatrix);
315 Double_t cp = TMath::Cos(phi);
316 Double_t sp = TMath::Sin(phi);
317 Double_t ct = TMath::Cos(theta);
318 Double_t st = TMath::Sin(theta);
320 covMatrix[0]*cp*cp*ct*ct // GetCovXX
321 +covMatrix[1]*2.*cp*sp*ct*ct // GetCovXY
322 +covMatrix[3]*2.*cp*ct*st // GetCovXZ
323 +covMatrix[2]*sp*sp*ct*ct // GetCovYY
324 +covMatrix[4]*2.*sp*ct*st // GetCovYZ
325 +covMatrix[5]*st*st; // GetCovZZ
328 //______________________________________________________________________________
329 Double_t AliAODVertex::RotatedCovMatrixXY(Double_t phi, Double_t theta) const
331 // XY term of covariance matrix after rotation by phi around z-axis
332 // and, then, by theta around new y-axis
335 //AliFatal("Covariance matrix not set");
339 Double_t covMatrix[6];
341 GetCovMatrix(covMatrix);
343 Double_t cp = TMath::Cos(phi);
344 Double_t sp = TMath::Sin(phi);
345 Double_t ct = TMath::Cos(theta);
346 Double_t st = TMath::Sin(theta);
348 -covMatrix[0]*cp*sp*ct // GetCovXX
349 +covMatrix[1]*ct*(cp*cp-sp*sp) // GetCovXY
350 -covMatrix[3]*sp*st // GetCovXZ
351 +covMatrix[2]*cp*sp*ct // GetCovYY
352 +covMatrix[4]*cp*st; // GetCovYZ
355 //______________________________________________________________________________
356 Double_t AliAODVertex::RotatedCovMatrixXZ(Double_t phi, Double_t theta) const
358 // XZ term of covariance matrix after rotation by phi around z-axis
359 // and, then, by theta around new y-axis
362 //AliFatal("Covariance matrix not set");
366 Double_t covMatrix[6];
368 GetCovMatrix(covMatrix);
370 Double_t cp = TMath::Cos(phi);
371 Double_t sp = TMath::Sin(phi);
372 Double_t ct = TMath::Cos(theta);
373 Double_t st = TMath::Sin(theta);
375 -covMatrix[0]*cp*cp*ct*st // GetCovXX
376 -covMatrix[1]*2.*cp*sp*ct*st // GetCovXY
377 +covMatrix[3]*cp*(ct*ct-st*st) // GetCovXZ
378 -covMatrix[2]*sp*sp*ct*st // GetCovYY
379 +covMatrix[4]*sp*(ct*ct-st*st) // GetCovYZ
380 +covMatrix[5]*ct*st; // GetCovZZ
383 //______________________________________________________________________________
384 Double_t AliAODVertex::RotatedCovMatrixYY(Double_t phi) const
386 // YY term of covariance matrix after rotation by phi around z-axis
387 // and, then, by theta around new y-axis
390 //AliFatal("Covariance matrix not set");
394 Double_t covMatrix[6];
396 GetCovMatrix(covMatrix);
398 Double_t cp = TMath::Cos(phi);
399 Double_t sp = TMath::Sin(phi);
401 covMatrix[0]*sp*sp // GetCovXX
402 -covMatrix[1]*2.*cp*sp // GetCovXY
403 +covMatrix[2]*cp*cp; // GetCovYY
406 //______________________________________________________________________________
407 Double_t AliAODVertex::RotatedCovMatrixYZ(Double_t phi, Double_t theta) const
409 // YZ term of covariance matrix after rotation by phi around z-axis
410 // and, then, by theta around new y-axis
413 //AliFatal("Covariance matrix not set");
417 Double_t covMatrix[6];
419 GetCovMatrix(covMatrix);
421 Double_t cp = TMath::Cos(phi);
422 Double_t sp = TMath::Sin(phi);
423 Double_t ct = TMath::Cos(theta);
424 Double_t st = TMath::Sin(theta);
426 covMatrix[0]*cp*sp*st // GetCovXX
427 +covMatrix[1]*st*(sp*sp-cp*cp) // GetCovXY
428 -covMatrix[3]*sp*ct // GetCovXZ
429 -covMatrix[2]*cp*sp*st // GetCovYY
430 +covMatrix[4]*cp*ct; // GetCovYZ
433 //______________________________________________________________________________
434 Double_t AliAODVertex::RotatedCovMatrixZZ(Double_t phi, Double_t theta) const
436 // ZZ term of covariance matrix after rotation by phi around z-axis
437 // and, then, by theta around new y-axis
440 //AliFatal("Covariance matrix not set");
444 Double_t covMatrix[6];
446 GetCovMatrix(covMatrix);
448 Double_t cp = TMath::Cos(phi);
449 Double_t sp = TMath::Sin(phi);
450 Double_t ct = TMath::Cos(theta);
451 Double_t st = TMath::Sin(theta);
453 covMatrix[0]*cp*cp*st*st // GetCovXX
454 +covMatrix[1]*2.*cp*sp*st*st // GetCovXY
455 -covMatrix[3]*2.*cp*ct*st // GetCovXZ
456 +covMatrix[2]*sp*sp*st*st // GetCovYY
457 -covMatrix[4]*2.*sp*sp*ct*st // GetCovYZ
458 +covMatrix[5]*ct*ct; // GetCovZZ
461 //______________________________________________________________________________
462 Double_t AliAODVertex::DistanceToVertex(AliAODVertex *vtx) const
464 // distance in 3D to another AliAODVertex
466 Double_t dx = GetX()-vtx->GetX();
467 Double_t dy = GetY()-vtx->GetY();
468 Double_t dz = GetZ()-vtx->GetZ();
470 return TMath::Sqrt(dx*dx+dy*dy+dz*dz);
473 //______________________________________________________________________________
474 Double_t AliAODVertex::DistanceXYToVertex(AliAODVertex *vtx) const
476 // distance in XY to another AliAODVertex
478 Double_t dx = GetX()-vtx->GetX();
479 Double_t dy = GetY()-vtx->GetY();
481 return TMath::Sqrt(dx*dx+dy*dy);
484 //______________________________________________________________________________
485 Double_t AliAODVertex::ErrorDistanceToVertex(AliAODVertex *vtx) const
487 // error on the distance in 3D to another AliAODVertex
490 PhiAndThetaToVertex(vtx,phi,theta);
491 // error2 due to this vertex
492 Double_t error2 = RotatedCovMatrixXX(phi,theta);
493 // error2 due to vtx vertex
494 Double_t error2vtx = vtx->RotatedCovMatrixXX(phi,theta);
496 return TMath::Sqrt(error2+error2vtx);
499 //______________________________________________________________________________
500 Double_t AliAODVertex::ErrorDistanceXYToVertex(AliAODVertex *vtx) const
502 // error on the distance in XY to another AliAODVertex
505 PhiAndThetaToVertex(vtx,phi,theta);
506 // error2 due to this vertex
507 Double_t error2 = RotatedCovMatrixXX(phi);
508 // error2 due to vtx vertex
509 Double_t error2vtx = vtx->RotatedCovMatrixXX(phi);
511 return TMath::Sqrt(error2+error2vtx);
514 //______________________________________________________________________________
515 template <class T, class P>
516 void AliAODVertex::PhiAndThetaToVertex(AliAODVertex *vtx, P &phi, T &theta) const
518 // rotation angles around z-axis (phi) and around new y-axis (theta)
519 // with which vtx is seen (used by RotatedCovMatrix... methods)
521 phi = TMath::Pi()+TMath::ATan2(-vtx->GetY()+GetY(),-vtx->GetX()+GetX());
522 Double_t vtxxphi = vtx->GetX()*TMath::Cos(phi)+vtx->GetY()*TMath::Sin(phi);
523 Double_t xphi = GetX()*TMath::Cos(phi)+GetY()*TMath::Sin(phi);
524 theta = TMath::ATan2(vtx->GetZ()-GetZ(),vtxxphi-xphi);
527 //______________________________________________________________________________
528 void AliAODVertex::PrintIndices() const
530 // Print indices of particles originating form this vertex
532 TRefArrayIter iter(&fDaughters);
533 while (TObject *daugh = iter.Next()) {
534 printf("Particle %p originates from this vertex.\n", static_cast<void*>(daugh));
538 //______________________________________________________________________________
539 void AliAODVertex::Print(Option_t* /*option*/) const
541 // Print information of all data members
543 printf("Vertex position:\n");
544 printf(" x = %f\n", fPosition[0]);
545 printf(" y = %f\n", fPosition[1]);
546 printf(" z = %f\n", fPosition[2]);
547 printf(" parent particle: %p\n", static_cast<void*>(fParent.GetObject()));
548 printf(" origin of %d particles\n", fDaughters.GetEntriesFast());
549 printf(" vertex type %d\n", fType);
553 printf("Covariance matrix:\n");
554 printf(" %12.10f %12.10f %12.10f\n %12.10f %12.10f %12.10f\n %12.10f %12.10f %12.10f\n",
565 printf(" Chi^2/NDF = %f\n", fChi2perNDF);