1 /**************************************************************************
2 * Copyright(c) 1998-1999, 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 *
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 **************************************************************************/
18 ///////////////////////////////////////////////////
26 ///////////////////////////////////////////////////
28 #include "AliMUONTrackParam.h"
29 #include "AliMUONHitForRec.h"
31 #include "AliESDMuonTrack.h"
34 #include <Riostream.h>
39 ClassImp(AliMUONTrackParam) // Class implementation in ROOT context
42 //_________________________________________________________________________
43 AliMUONTrackParam::AliMUONTrackParam()
49 fInverseBendingMomentum(0.),
57 //_________________________________________________________________________
58 AliMUONTrackParam::AliMUONTrackParam(const AliMUONTrackParam& theMUONTrackParam)
59 : TObject(theMUONTrackParam),
60 fNonBendingCoor(theMUONTrackParam.fNonBendingCoor),
61 fNonBendingSlope(theMUONTrackParam.fNonBendingSlope),
62 fBendingCoor(theMUONTrackParam.fBendingCoor),
63 fBendingSlope(theMUONTrackParam.fBendingSlope),
64 fInverseBendingMomentum(theMUONTrackParam.fInverseBendingMomentum),
65 fZ(theMUONTrackParam.fZ),
67 fHitForRecPtr(theMUONTrackParam.fHitForRecPtr)
70 if (theMUONTrackParam.fCovariances) fCovariances = new TMatrixD(*(theMUONTrackParam.fCovariances));
73 //_________________________________________________________________________
74 AliMUONTrackParam& AliMUONTrackParam::operator=(const AliMUONTrackParam& theMUONTrackParam)
76 /// Asignment operator
77 if (this == &theMUONTrackParam)
80 // base class assignement
81 TObject::operator=(theMUONTrackParam);
83 fNonBendingCoor = theMUONTrackParam.fNonBendingCoor;
84 fNonBendingSlope = theMUONTrackParam.fNonBendingSlope;
85 fBendingCoor = theMUONTrackParam.fBendingCoor;
86 fBendingSlope = theMUONTrackParam.fBendingSlope;
87 fInverseBendingMomentum = theMUONTrackParam.fInverseBendingMomentum;
88 fZ = theMUONTrackParam.fZ;
90 if (theMUONTrackParam.fCovariances) {
91 if (fCovariances) *fCovariances = *(theMUONTrackParam.fCovariances);
92 else fCovariances = new TMatrixD(*(theMUONTrackParam.fCovariances));
93 } else if (fCovariances) {
101 //__________________________________________________________________________
102 AliMUONTrackParam::~AliMUONTrackParam()
108 //__________________________________________________________________________
109 void AliMUONTrackParam::SetTrackParam(AliMUONTrackParam& theMUONTrackParam)
111 /// Set track parameters from "TrackParam" leaving pointer to fHitForRecPtr and parameter covariances unchanged
112 fNonBendingCoor = theMUONTrackParam.fNonBendingCoor;
113 fNonBendingSlope = theMUONTrackParam.fNonBendingSlope;
114 fBendingCoor = theMUONTrackParam.fBendingCoor;
115 fBendingSlope = theMUONTrackParam.fBendingSlope;
116 fInverseBendingMomentum = theMUONTrackParam.fInverseBendingMomentum;
117 fZ = theMUONTrackParam.fZ;
120 //__________________________________________________________________________
121 AliMUONHitForRec* AliMUONTrackParam::GetHitForRecPtr(void) const
123 /// return pointer to HitForRec attached to the current TrackParam
124 /// this method should not be called when fHitForRecPtr == NULL
125 if (!fHitForRecPtr) AliWarning("fHitForRecPtr == NULL");
126 return fHitForRecPtr;
129 //_________________________________________________________________________
130 void AliMUONTrackParam::GetParamFrom(const AliESDMuonTrack& esdMuonTrack)
132 /// assigned value form ESD track.
133 fInverseBendingMomentum = esdMuonTrack.GetInverseBendingMomentum();
134 fBendingSlope = TMath::Tan(esdMuonTrack.GetThetaY());
135 fNonBendingSlope = TMath::Tan(esdMuonTrack.GetThetaX());
136 fZ = esdMuonTrack.GetZ();
137 fBendingCoor = esdMuonTrack.GetBendingCoor();
138 fNonBendingCoor = esdMuonTrack.GetNonBendingCoor();
141 //_________________________________________________________________________
142 void AliMUONTrackParam::SetParamFor(AliESDMuonTrack& esdMuonTrack)
144 /// assigned value form ESD track.
145 esdMuonTrack.SetInverseBendingMomentum(fInverseBendingMomentum);
146 esdMuonTrack.SetThetaX(TMath::ATan(fNonBendingSlope));
147 esdMuonTrack.SetThetaY(TMath::ATan(fBendingSlope));
148 esdMuonTrack.SetZ(fZ);
149 esdMuonTrack.SetBendingCoor(fBendingCoor);
150 esdMuonTrack.SetNonBendingCoor(fNonBendingCoor);
153 //_________________________________________________________________________
154 void AliMUONTrackParam::GetParamFromUncorrected(const AliESDMuonTrack& esdMuonTrack)
156 /// assigned value form ESD track.
157 fInverseBendingMomentum = esdMuonTrack.GetInverseBendingMomentumUncorrected();
158 fBendingSlope = TMath::Tan(esdMuonTrack.GetThetaYUncorrected());
159 fNonBendingSlope = TMath::Tan(esdMuonTrack.GetThetaXUncorrected());
160 fZ = esdMuonTrack.GetZUncorrected();
161 fBendingCoor = esdMuonTrack.GetBendingCoorUncorrected();
162 fNonBendingCoor = esdMuonTrack.GetNonBendingCoorUncorrected();
165 //_________________________________________________________________________
166 void AliMUONTrackParam::SetParamForUncorrected(AliESDMuonTrack& esdMuonTrack)
168 /// assigned value form ESD track.
169 esdMuonTrack.SetInverseBendingMomentumUncorrected(fInverseBendingMomentum);
170 esdMuonTrack.SetThetaXUncorrected(TMath::ATan(fNonBendingSlope));
171 esdMuonTrack.SetThetaYUncorrected(TMath::ATan(fBendingSlope));
172 esdMuonTrack.SetZUncorrected(fZ);
173 esdMuonTrack.SetBendingCoorUncorrected(fBendingCoor);
174 esdMuonTrack.SetNonBendingCoorUncorrected(fNonBendingCoor);
177 //__________________________________________________________________________
178 Double_t AliMUONTrackParam::Px() const
180 /// return p_x from track parameters
181 Double_t pYZ, pZ, pX;
183 if ( TMath::Abs(fInverseBendingMomentum) > 0 )
184 pYZ = TMath::Abs(1.0 / fInverseBendingMomentum);
185 pZ = -pYZ / (TMath::Sqrt(1.0 + fBendingSlope * fBendingSlope)); // spectro. (z<0)
186 pX = pZ * fNonBendingSlope;
190 //__________________________________________________________________________
191 Double_t AliMUONTrackParam::Py() const
193 /// return p_y from track parameters
194 Double_t pYZ, pZ, pY;
196 if ( TMath::Abs(fInverseBendingMomentum) > 0 )
197 pYZ = TMath::Abs(1.0 / fInverseBendingMomentum);
198 pZ = -pYZ / (TMath::Sqrt(1.0 + fBendingSlope * fBendingSlope)); // spectro. (z<0)
199 pY = pZ * fBendingSlope;
203 //__________________________________________________________________________
204 Double_t AliMUONTrackParam::Pz() const
206 /// return p_z from track parameters
209 if ( TMath::Abs(fInverseBendingMomentum) > 0 )
210 pYZ = TMath::Abs(1.0 / fInverseBendingMomentum);
211 pZ = -pYZ / (TMath::Sqrt(1.0 + fBendingSlope * fBendingSlope)); // spectro. (z<0)
215 //__________________________________________________________________________
216 Double_t AliMUONTrackParam::P() const
218 /// return p from track parameters
221 if ( TMath::Abs(fInverseBendingMomentum) > 0 )
222 pYZ = TMath::Abs(1.0 / fInverseBendingMomentum);
223 pZ = -pYZ / (TMath::Sqrt(1.0 + fBendingSlope * fBendingSlope)); // spectro. (z<0)
225 TMath::Sqrt(1.0 + fBendingSlope * fBendingSlope + fNonBendingSlope * fNonBendingSlope);
230 //__________________________________________________________________________
231 TMatrixD* AliMUONTrackParam::GetCovariances()
233 /// Return the covariance matrix (create it before if needed)
235 fCovariances = new TMatrixD(5,5);
241 //__________________________________________________________________________
242 void AliMUONTrackParam::SetCovariances(TMatrixD* covariances)
244 /// Set the covariance matrix
245 if (covariances == fCovariances) return; // nothing to be done
246 if (fCovariances) *fCovariances = *covariances;
247 else fCovariances = new TMatrixD(*covariances);
250 //__________________________________________________________________________
251 void AliMUONTrackParam::SetCovariances(Double_t matrix[5][5])
253 /// Set the covariance matrix
254 if (fCovariances) fCovariances->SetMatrixArray(&(matrix[0][0]));
255 else fCovariances = new TMatrixD(5,5,&(matrix[0][0]));
258 //__________________________________________________________________________
259 void AliMUONTrackParam::SetVariances(Double_t matrix[5][5])
261 /// Set the diagonal terms of the covariance matrix (variances)
262 if (!fCovariances) fCovariances = new TMatrixD(5,5);
264 for (Int_t i=0; i<5; i++) (*fCovariances)(i,i) = matrix[i][i];
267 //__________________________________________________________________________
268 void AliMUONTrackParam::DeleteCovariances()
270 /// Delete the covariance matrix
271 if (fCovariances) delete fCovariances;
275 //__________________________________________________________________________
276 void AliMUONTrackParam::EvalCovariances(AliMUONHitForRec* hit2)
278 /// Evaluate covariances assuming the track is only a straight line
279 /// between the HitForRec attached to the current TrackParam and hit2.
280 /// Nothing can be done on fInverseBendingMomentum (-> 50% err).
282 // Allocate memory if needed
283 if (!fCovariances) fCovariances = new TMatrixD(5,5);
285 // Reset the covariance matrix
288 if (!fHitForRecPtr) {
289 AliWarning("fHitForRecPtr == NULL: cannot calculate TrackParam covariances");
293 Double_t dz = fHitForRecPtr->GetZ() - hit2->GetZ();
296 (*fCovariances)(0,0) = fHitForRecPtr->GetNonBendingReso2();
297 (*fCovariances)(0,1) = fHitForRecPtr->GetNonBendingReso2() / dz;
298 (*fCovariances)(1,0) = (*fCovariances)(0,1);
299 (*fCovariances)(1,1) = ( fHitForRecPtr->GetNonBendingReso2() + hit2->GetNonBendingReso2() ) / dz / dz;
301 (*fCovariances)(2,2) = fHitForRecPtr->GetBendingReso2();
302 (*fCovariances)(2,3) = fHitForRecPtr->GetBendingReso2() / dz;
303 (*fCovariances)(3,2) = (*fCovariances)(2,3);
304 (*fCovariances)(3,3) = ( fHitForRecPtr->GetBendingReso2() + hit2->GetBendingReso2() ) / dz / dz;
305 // Inverse bending momentum
306 (*fCovariances)(4,4) = 0.5*fInverseBendingMomentum * 0.5*fInverseBendingMomentum; // error 50%
310 //__________________________________________________________________________
311 Int_t AliMUONTrackParam::Compare(const TObject* trackParam) const
313 /// "Compare" function to sort with decreasing Z (spectro. muon Z <0).
314 /// Returns 1 (0, -1) if Z of current TrackHit
315 /// is smaller than (equal to, larger than) Z of TrackHit
317 if (fHitForRecPtr->GetZ() != fZ)
318 AliWarning("track parameters are given at a different z position than the one of the corresponding hit");
320 if (fZ < ((AliMUONTrackParam*)trackParam)->GetZ()) return(1);
321 else if (fZ == ((AliMUONTrackParam*)trackParam)->GetZ()) return(0);
325 //_____________________________________________-
326 void AliMUONTrackParam::Print(Option_t* opt) const
328 /// Printing TrackParam information
329 /// "full" option for printing all the information about the TrackParam
333 if ( sopt.Contains("FULL") ) {
334 cout << "<AliMUONTrackParam> Bending P=" << setw(5) << setprecision(3) << 1./GetInverseBendingMomentum() <<
335 ", NonBendSlope=" << setw(5) << setprecision(3) << GetNonBendingSlope()*180./TMath::Pi() <<
336 ", BendSlope=" << setw(5) << setprecision(3) << GetBendingSlope()*180./TMath::Pi() <<
337 ", (x,y,z)_IP=(" << setw(5) << setprecision(3) << GetNonBendingCoor() <<
338 "," << setw(5) << setprecision(3) << GetBendingCoor() <<
339 "," << setw(5) << setprecision(3) << GetZ() <<
340 ") cm, (px,py,pz)=(" << setw(5) << setprecision(3) << Px() <<
341 "," << setw(5) << setprecision(3) << Py() <<
342 "," << setw(5) << setprecision(3) << Pz() << ") GeV/c" << endl;
345 cout << "<AliMUONTrackParam>" << endl;