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a9e2aefa | 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 | ||
88cb7938 | 16 | /* $Id$ */ |
a9e2aefa | 17 | |
3831f268 | 18 | /////////////////////////////////////////////////// |
19 | // | |
20 | // Track parameters | |
21 | // in | |
22 | // ALICE | |
23 | // dimuon | |
24 | // spectrometer | |
a9e2aefa | 25 | // |
3831f268 | 26 | /////////////////////////////////////////////////// |
a9e2aefa | 27 | |
37827b29 | 28 | #include <Riostream.h> |
3010c308 | 29 | #include <TMath.h> |
208f139e | 30 | #include <TMatrixD.h> |
37827b29 | 31 | |
32 | #include "AliMUONTrackParam.h" | |
211c52eb | 33 | #include "AliESDMuonTrack.h" |
37827b29 | 34 | #include "AliLog.h" |
de2cd600 | 35 | #include "AliMUONHitForRec.h" |
a9e2aefa | 36 | |
7945aae7 | 37 | /// \cond CLASSIMP |
a9e2aefa | 38 | ClassImp(AliMUONTrackParam) // Class implementation in ROOT context |
7945aae7 | 39 | /// \endcond |
a9e2aefa | 40 | |
61adb9bd | 41 | //_________________________________________________________________________ |
30178c30 | 42 | AliMUONTrackParam::AliMUONTrackParam() |
54d7ba50 | 43 | : TObject(), |
208f139e | 44 | fNonBendingCoor(0.), |
54d7ba50 | 45 | fNonBendingSlope(0.), |
54d7ba50 | 46 | fBendingCoor(0.), |
208f139e | 47 | fBendingSlope(0.), |
48 | fInverseBendingMomentum(0.), | |
49 | fZ(0.), | |
50 | fCovariances(0x0), | |
de2cd600 | 51 | fHitForRecPtr(0x0) |
30178c30 | 52 | { |
37827b29 | 53 | /// Constructor |
30178c30 | 54 | } |
61adb9bd | 55 | |
30178c30 | 56 | //_________________________________________________________________________ |
de2cd600 | 57 | AliMUONTrackParam::AliMUONTrackParam(const AliMUONTrackParam& theMUONTrackParam) |
58 | : TObject(theMUONTrackParam), | |
208f139e | 59 | fNonBendingCoor(theMUONTrackParam.fNonBendingCoor), |
de2cd600 | 60 | fNonBendingSlope(theMUONTrackParam.fNonBendingSlope), |
de2cd600 | 61 | fBendingCoor(theMUONTrackParam.fBendingCoor), |
208f139e | 62 | fBendingSlope(theMUONTrackParam.fBendingSlope), |
63 | fInverseBendingMomentum(theMUONTrackParam.fInverseBendingMomentum), | |
64 | fZ(theMUONTrackParam.fZ), | |
65 | fCovariances(0x0), | |
de2cd600 | 66 | fHitForRecPtr(theMUONTrackParam.fHitForRecPtr) |
67 | { | |
2457f726 | 68 | /// Copy constructor |
208f139e | 69 | if (theMUONTrackParam.fCovariances) fCovariances = new TMatrixD(*(theMUONTrackParam.fCovariances)); |
de2cd600 | 70 | } |
71 | ||
72 | //_________________________________________________________________________ | |
73 | AliMUONTrackParam& AliMUONTrackParam::operator=(const AliMUONTrackParam& theMUONTrackParam) | |
61adb9bd | 74 | { |
2457f726 | 75 | /// Asignment operator |
30178c30 | 76 | if (this == &theMUONTrackParam) |
61adb9bd | 77 | return *this; |
78 | ||
30178c30 | 79 | // base class assignement |
80 | TObject::operator=(theMUONTrackParam); | |
81 | ||
208f139e | 82 | fNonBendingCoor = theMUONTrackParam.fNonBendingCoor; |
83 | fNonBendingSlope = theMUONTrackParam.fNonBendingSlope; | |
84 | fBendingCoor = theMUONTrackParam.fBendingCoor; | |
85 | fBendingSlope = theMUONTrackParam.fBendingSlope; | |
86 | fInverseBendingMomentum = theMUONTrackParam.fInverseBendingMomentum; | |
87 | fZ = theMUONTrackParam.fZ; | |
88 | ||
89 | if (theMUONTrackParam.fCovariances) { | |
90 | if (fCovariances) *fCovariances = *(theMUONTrackParam.fCovariances); | |
91 | else fCovariances = new TMatrixD(*(theMUONTrackParam.fCovariances)); | |
92 | } else if (fCovariances) { | |
93 | delete fCovariances; | |
94 | fCovariances = 0x0; | |
95 | } | |
96 | ||
61adb9bd | 97 | return *this; |
98 | } | |
de2cd600 | 99 | |
100 | //__________________________________________________________________________ | |
101 | AliMUONTrackParam::~AliMUONTrackParam() | |
61adb9bd | 102 | { |
de2cd600 | 103 | /// Destructor |
208f139e | 104 | DeleteCovariances(); |
de2cd600 | 105 | } |
106 | ||
107 | //__________________________________________________________________________ | |
108 | void AliMUONTrackParam::SetTrackParam(AliMUONTrackParam& theMUONTrackParam) | |
109 | { | |
208f139e | 110 | /// Set track parameters from "TrackParam" leaving pointer to fHitForRecPtr and parameter covariances unchanged |
111 | fNonBendingCoor = theMUONTrackParam.fNonBendingCoor; | |
112 | fNonBendingSlope = theMUONTrackParam.fNonBendingSlope; | |
113 | fBendingCoor = theMUONTrackParam.fBendingCoor; | |
114 | fBendingSlope = theMUONTrackParam.fBendingSlope; | |
115 | fInverseBendingMomentum = theMUONTrackParam.fInverseBendingMomentum; | |
116 | fZ = theMUONTrackParam.fZ; | |
de2cd600 | 117 | } |
54d7ba50 | 118 | |
de2cd600 | 119 | //__________________________________________________________________________ |
120 | AliMUONHitForRec* AliMUONTrackParam::GetHitForRecPtr(void) const | |
121 | { | |
122 | /// return pointer to HitForRec attached to the current TrackParam | |
123 | /// this method should not be called when fHitForRecPtr == NULL | |
208f139e | 124 | if (!fHitForRecPtr) AliWarning("fHitForRecPtr == NULL"); |
de2cd600 | 125 | return fHitForRecPtr; |
126 | } | |
127 | ||
211c52eb | 128 | //_________________________________________________________________________ |
129 | void AliMUONTrackParam::GetParamFrom(const AliESDMuonTrack& esdMuonTrack) | |
130 | { | |
2457f726 | 131 | /// assigned value form ESD track. |
208f139e | 132 | fInverseBendingMomentum = esdMuonTrack.GetInverseBendingMomentum(); |
133 | fBendingSlope = TMath::Tan(esdMuonTrack.GetThetaY()); | |
134 | fNonBendingSlope = TMath::Tan(esdMuonTrack.GetThetaX()); | |
135 | fZ = esdMuonTrack.GetZ(); | |
136 | fBendingCoor = esdMuonTrack.GetBendingCoor(); | |
137 | fNonBendingCoor = esdMuonTrack.GetNonBendingCoor(); | |
211c52eb | 138 | } |
139 | ||
140 | //_________________________________________________________________________ | |
141 | void AliMUONTrackParam::SetParamFor(AliESDMuonTrack& esdMuonTrack) | |
142 | { | |
2457f726 | 143 | /// assigned value form ESD track. |
211c52eb | 144 | esdMuonTrack.SetInverseBendingMomentum(fInverseBendingMomentum); |
145 | esdMuonTrack.SetThetaX(TMath::ATan(fNonBendingSlope)); | |
146 | esdMuonTrack.SetThetaY(TMath::ATan(fBendingSlope)); | |
147 | esdMuonTrack.SetZ(fZ); | |
148 | esdMuonTrack.SetBendingCoor(fBendingCoor); | |
149 | esdMuonTrack.SetNonBendingCoor(fNonBendingCoor); | |
150 | } | |
151 | ||
b8dc484b | 152 | //__________________________________________________________________________ |
6464217e | 153 | Double_t AliMUONTrackParam::Px() const |
b8dc484b | 154 | { |
2457f726 | 155 | /// return px from track paramaters |
b8dc484b | 156 | Double_t pYZ, pZ, pX; |
157 | pYZ = 0; | |
158 | if ( TMath::Abs(fInverseBendingMomentum) > 0 ) | |
159 | pYZ = TMath::Abs(1.0 / fInverseBendingMomentum); | |
160 | pZ = -pYZ / (TMath::Sqrt(1.0 + fBendingSlope * fBendingSlope)); // spectro. (z<0) | |
161 | pX = pZ * fNonBendingSlope; | |
162 | return pX; | |
163 | } | |
37827b29 | 164 | |
b8dc484b | 165 | //__________________________________________________________________________ |
6464217e | 166 | Double_t AliMUONTrackParam::Py() const |
b8dc484b | 167 | { |
2457f726 | 168 | /// return px from track paramaters |
b8dc484b | 169 | Double_t pYZ, pZ, pY; |
170 | pYZ = 0; | |
171 | if ( TMath::Abs(fInverseBendingMomentum) > 0 ) | |
172 | pYZ = TMath::Abs(1.0 / fInverseBendingMomentum); | |
173 | pZ = -pYZ / (TMath::Sqrt(1.0 + fBendingSlope * fBendingSlope)); // spectro. (z<0) | |
174 | pY = pZ * fBendingSlope; | |
175 | return pY; | |
176 | } | |
37827b29 | 177 | |
b8dc484b | 178 | //__________________________________________________________________________ |
6464217e | 179 | Double_t AliMUONTrackParam::Pz() const |
b8dc484b | 180 | { |
2457f726 | 181 | /// return px from track paramaters |
b8dc484b | 182 | Double_t pYZ, pZ; |
183 | pYZ = 0; | |
184 | if ( TMath::Abs(fInverseBendingMomentum) > 0 ) | |
185 | pYZ = TMath::Abs(1.0 / fInverseBendingMomentum); | |
186 | pZ = -pYZ / (TMath::Sqrt(1.0 + fBendingSlope * fBendingSlope)); // spectro. (z<0) | |
187 | return pZ; | |
188 | } | |
37827b29 | 189 | |
b8dc484b | 190 | //__________________________________________________________________________ |
6464217e | 191 | Double_t AliMUONTrackParam::P() const |
b8dc484b | 192 | { |
2457f726 | 193 | /// return p from track paramaters |
b8dc484b | 194 | Double_t pYZ, pZ, p; |
195 | pYZ = 0; | |
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 | p = TMath::Abs(pZ) * | |
200 | TMath::Sqrt(1.0 + fBendingSlope * fBendingSlope + fNonBendingSlope * fNonBendingSlope); | |
201 | return p; | |
202 | ||
b45fd22b | 203 | } |
4d03a78e | 204 | |
208f139e | 205 | //__________________________________________________________________________ |
206 | TMatrixD* AliMUONTrackParam::GetCovariances() | |
207 | { | |
208 | /// Return the covariance matrix (create it before if needed) | |
209 | if (!fCovariances) { | |
210 | fCovariances = new TMatrixD(5,5); | |
211 | (*fCovariances) = 0; | |
212 | } | |
213 | return fCovariances; | |
214 | } | |
215 | ||
216 | //__________________________________________________________________________ | |
217 | void AliMUONTrackParam::SetCovariances(TMatrixD* covariances) | |
218 | { | |
219 | /// Set the covariance matrix | |
220 | if (covariances == fCovariances) return; // nothing to be done | |
221 | if (fCovariances) *fCovariances = *covariances; | |
222 | else fCovariances = new TMatrixD(*covariances); | |
223 | } | |
224 | ||
225 | //__________________________________________________________________________ | |
226 | void AliMUONTrackParam::SetCovariances(Double_t matrix[5][5]) | |
227 | { | |
228 | /// Set the covariance matrix | |
229 | if (fCovariances) fCovariances->SetMatrixArray(&(matrix[0][0])); | |
230 | else fCovariances = new TMatrixD(5,5,&(matrix[0][0])); | |
231 | } | |
232 | ||
233 | //__________________________________________________________________________ | |
234 | void AliMUONTrackParam::SetVariances(Double_t matrix[5][5]) | |
235 | { | |
236 | /// Set the diagonal terms of the covariance matrix (variances) | |
237 | if (!fCovariances) fCovariances = new TMatrixD(5,5); | |
238 | (*fCovariances) = 0; | |
239 | for (Int_t i=0; i<5; i++) (*fCovariances)(i,i) = matrix[i][i]; | |
240 | } | |
241 | ||
242 | //__________________________________________________________________________ | |
243 | void AliMUONTrackParam::DeleteCovariances() | |
244 | { | |
245 | /// Delete the covariance matrix | |
246 | if (fCovariances) delete fCovariances; | |
247 | fCovariances = 0x0; | |
248 | } | |
249 | ||
250 | //__________________________________________________________________________ | |
251 | void AliMUONTrackParam::EvalCovariances(AliMUONHitForRec* hit2) | |
252 | { | |
253 | /// Evaluate covariances assuming the track is only a straight line | |
254 | /// between the HitForRec attached to the current TrackParam and hit2. | |
255 | /// Nothing can be done on fInverseBendingMomentum (-> 50% err). | |
256 | ||
257 | // Allocate memory if needed | |
258 | if (!fCovariances) fCovariances = new TMatrixD(5,5); | |
259 | ||
260 | // Reset the covariance matrix | |
261 | (*fCovariances) = 0; | |
262 | ||
263 | if (!fHitForRecPtr) { | |
264 | AliWarning("fHitForRecPtr == NULL: cannot calculate TrackParam covariances"); | |
265 | return; | |
266 | } | |
267 | ||
268 | Double_t dz = fHitForRecPtr->GetZ() - hit2->GetZ(); | |
269 | ||
270 | // Non bending plane | |
271 | (*fCovariances)(0,0) = fHitForRecPtr->GetNonBendingReso2(); | |
272 | (*fCovariances)(0,1) = fHitForRecPtr->GetNonBendingReso2() / dz; | |
273 | (*fCovariances)(1,0) = (*fCovariances)(0,1); | |
274 | (*fCovariances)(1,1) = ( fHitForRecPtr->GetNonBendingReso2() + hit2->GetNonBendingReso2() ) / dz / dz; | |
275 | // Bending plane | |
276 | (*fCovariances)(2,2) = fHitForRecPtr->GetBendingReso2(); | |
277 | (*fCovariances)(2,3) = fHitForRecPtr->GetBendingReso2() / dz; | |
278 | (*fCovariances)(3,2) = (*fCovariances)(2,3); | |
279 | (*fCovariances)(3,3) = ( fHitForRecPtr->GetBendingReso2() + hit2->GetBendingReso2() ) / dz / dz; | |
280 | // Inverse bending momentum | |
281 | (*fCovariances)(4,4) = 0.5*fInverseBendingMomentum * 0.5*fInverseBendingMomentum; // error 50% | |
282 | ||
283 | } | |
284 | ||
285 | //__________________________________________________________________________ | |
286 | Int_t AliMUONTrackParam::Compare(const TObject* trackParam) const | |
287 | { | |
288 | /// "Compare" function to sort with decreasing Z (spectro. muon Z <0). | |
289 | /// Returns 1 (0, -1) if Z of current TrackHit | |
290 | /// is smaller than (equal to, larger than) Z of TrackHit | |
847cbaef | 291 | if (fHitForRecPtr) { |
292 | if (fHitForRecPtr->GetZ() != fZ) | |
293 | AliWarning("track parameters are given at a different z position than the one of the corresponding hit"); | |
294 | } | |
295 | if (fZ < ((AliMUONTrackParam*)trackParam)->GetZ()) return(1); | |
296 | else if (fZ == ((AliMUONTrackParam*)trackParam)->GetZ()) return(0); | |
208f139e | 297 | else return(-1); |
298 | } | |
299 | ||
6464217e | 300 | //_____________________________________________- |
301 | void AliMUONTrackParam::Print(Option_t* opt) const | |
302 | { | |
2457f726 | 303 | /// Printing TrackParam information |
304 | /// "full" option for printing all the information about the TrackParam | |
6464217e | 305 | TString sopt(opt); |
306 | sopt.ToUpper(); | |
307 | ||
308 | if ( sopt.Contains("FULL") ) { | |
309 | cout << "<AliMUONTrackParam> Bending P=" << setw(5) << setprecision(3) << 1./GetInverseBendingMomentum() << | |
310 | ", NonBendSlope=" << setw(5) << setprecision(3) << GetNonBendingSlope()*180./TMath::Pi() << | |
311 | ", BendSlope=" << setw(5) << setprecision(3) << GetBendingSlope()*180./TMath::Pi() << | |
312 | ", (x,y,z)_IP=(" << setw(5) << setprecision(3) << GetNonBendingCoor() << | |
313 | "," << setw(5) << setprecision(3) << GetBendingCoor() << | |
314 | "," << setw(5) << setprecision(3) << GetZ() << | |
315 | ") cm, (px,py,pz)=(" << setw(5) << setprecision(3) << Px() << | |
316 | "," << setw(5) << setprecision(3) << Py() << | |
317 | "," << setw(5) << setprecision(3) << Pz() << ") GeV/c" << endl; | |
318 | } | |
319 | else { | |
320 | cout << "<AliMUONTrackParam>" << endl; | |
321 | } | |
322 | ||
323 | } |