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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 | |
3d1463c8 | 18 | //----------------------------------------------------------------------------- |
19 | // Class AliMUONTrack | |
20 | //------------------- | |
21 | // Reconstructed track in ALICE dimuon spectrometer | |
22 | //----------------------------------------------------------------------------- | |
a9e2aefa | 23 | |
63ed9c6b | 24 | #include "AliMUONTrack.h" |
34f1bfa0 | 25 | |
9bf6860b | 26 | #include "AliMUONReconstructor.h" |
103e6575 | 27 | #include "AliMUONVCluster.h" |
28 | #include "AliMUONVClusterStore.h" | |
7332f213 | 29 | #include "AliMUONObjectPair.h" |
7332f213 | 30 | #include "AliMUONTrackExtrap.h" |
933daf4c | 31 | #include "AliMUONConstants.h" |
32 | #include "AliMUONTrackParam.h" | |
a9e2aefa | 33 | |
63ed9c6b | 34 | #include "AliLog.h" |
35 | ||
63ed9c6b | 36 | #include <TMath.h> |
63ed9c6b | 37 | |
ea94c18b | 38 | #include <Riostream.h> |
39 | ||
7945aae7 | 40 | /// \cond CLASSIMP |
63ed9c6b | 41 | ClassImp(AliMUONTrack) // Class implementation in ROOT context |
7945aae7 | 42 | /// \endcond |
63ed9c6b | 43 | |
4ea3f013 | 44 | |
45 | const Double_t AliMUONTrack::fgkMaxChi2 = 1.e10; ///< maximum chi2 above which the track can be considered as abnormal | |
46 | ||
47 | ||
63ed9c6b | 48 | //__________________________________________________________________________ |
30178c30 | 49 | AliMUONTrack::AliMUONTrack() |
54d7ba50 | 50 | : TObject(), |
7332f213 | 51 | fTrackParamAtCluster(0x0), |
208f139e | 52 | fFitWithVertex(kFALSE), |
96ebe67e | 53 | fVertexErrXY2(), |
ea94c18b | 54 | fFitWithMCS(kFALSE), |
96ebe67e | 55 | fClusterWeightsNonBending(0x0), |
56 | fClusterWeightsBending(0x0), | |
ea94c18b | 57 | fGlobalChi2(-1.), |
58 | fImproved(kFALSE), | |
7771752e | 59 | fMatchTrigger(-1), |
54d7ba50 | 60 | fChi2MatchTrigger(0.), |
2e2d0c44 | 61 | fTrackID(-1), |
96ebe67e | 62 | fTrackParamAtVertex(0x0), |
423b32ca | 63 | fHitsPatternInTrigCh(0), |
5c15a68b | 64 | fLocalTrigger(0), |
65 | fConnected(kFALSE) | |
d837040f | 66 | { |
2457f726 | 67 | /// Default constructor |
96ebe67e | 68 | fVertexErrXY2[0] = 0.; |
69 | fVertexErrXY2[1] = 0.; | |
d837040f | 70 | } |
71 | ||
a9e2aefa | 72 | //__________________________________________________________________________ |
a0dc65b4 | 73 | AliMUONTrack::AliMUONTrack(AliMUONObjectPair *segment, Double_t bendingVertexDispersion) |
54d7ba50 | 74 | : TObject(), |
96ebe67e | 75 | fTrackParamAtCluster(new TClonesArray("AliMUONTrackParam",10)), |
208f139e | 76 | fFitWithVertex(kFALSE), |
96ebe67e | 77 | fVertexErrXY2(), |
ea94c18b | 78 | fFitWithMCS(kFALSE), |
96ebe67e | 79 | fClusterWeightsNonBending(0x0), |
80 | fClusterWeightsBending(0x0), | |
ea94c18b | 81 | fGlobalChi2(0.), |
82 | fImproved(kFALSE), | |
7771752e | 83 | fMatchTrigger(-1), |
54d7ba50 | 84 | fChi2MatchTrigger(0.), |
2e2d0c44 | 85 | fTrackID(-1), |
96ebe67e | 86 | fTrackParamAtVertex(0x0), |
423b32ca | 87 | fHitsPatternInTrigCh(0), |
5c15a68b | 88 | fLocalTrigger(0), |
89 | fConnected(kFALSE) | |
a9e2aefa | 90 | { |
96ebe67e | 91 | /// Constructor from two clusters |
de2cd600 | 92 | |
96ebe67e | 93 | fVertexErrXY2[0] = 0.; |
94 | fVertexErrXY2[1] = 0.; | |
208f139e | 95 | |
96ebe67e | 96 | // Pointers to clusters from the segment |
9bf6860b | 97 | AliMUONVCluster* firstCluster = (AliMUONVCluster*) segment->First(); |
98 | AliMUONVCluster* lastCluster = (AliMUONVCluster*) segment->Second(); | |
208f139e | 99 | |
ea94c18b | 100 | // Compute track parameters |
96ebe67e | 101 | Double_t z1 = firstCluster->GetZ(); |
102 | Double_t z2 = lastCluster->GetZ(); | |
103 | Double_t dZ = z1 - z2; | |
208f139e | 104 | // Non bending plane |
96ebe67e | 105 | Double_t nonBendingCoor1 = firstCluster->GetX(); |
106 | Double_t nonBendingCoor2 = lastCluster->GetX(); | |
ea94c18b | 107 | Double_t nonBendingSlope = (nonBendingCoor1 - nonBendingCoor2) / dZ; |
208f139e | 108 | // Bending plane |
96ebe67e | 109 | Double_t bendingCoor1 = firstCluster->GetY(); |
110 | Double_t bendingCoor2 = lastCluster->GetY(); | |
ea94c18b | 111 | Double_t bendingSlope = (bendingCoor1 - bendingCoor2) / dZ; |
208f139e | 112 | // Inverse bending momentum |
96ebe67e | 113 | Double_t bendingImpact = bendingCoor1 - z1 * bendingSlope; |
208f139e | 114 | Double_t inverseBendingMomentum = 1. / AliMUONTrackExtrap::GetBendingMomentumFromImpactParam(bendingImpact); |
ea94c18b | 115 | |
9bf6860b | 116 | // Set track parameters at first cluster |
96ebe67e | 117 | AliMUONTrackParam trackParamAtFirstCluster; |
118 | trackParamAtFirstCluster.SetZ(z1); | |
119 | trackParamAtFirstCluster.SetNonBendingCoor(nonBendingCoor1); | |
120 | trackParamAtFirstCluster.SetNonBendingSlope(nonBendingSlope); | |
121 | trackParamAtFirstCluster.SetBendingCoor(bendingCoor1); | |
122 | trackParamAtFirstCluster.SetBendingSlope(bendingSlope); | |
123 | trackParamAtFirstCluster.SetInverseBendingMomentum(inverseBendingMomentum); | |
208f139e | 124 | |
9bf6860b | 125 | // Set track parameters at last cluster |
96ebe67e | 126 | AliMUONTrackParam trackParamAtLastCluster; |
127 | trackParamAtLastCluster.SetZ(z2); | |
128 | trackParamAtLastCluster.SetNonBendingCoor(nonBendingCoor2); | |
129 | trackParamAtLastCluster.SetNonBendingSlope(nonBendingSlope); | |
130 | trackParamAtLastCluster.SetBendingCoor(bendingCoor2); | |
131 | trackParamAtLastCluster.SetBendingSlope(bendingSlope); | |
132 | trackParamAtLastCluster.SetInverseBendingMomentum(inverseBendingMomentum); | |
ea94c18b | 133 | |
9bf6860b | 134 | // Compute and set track parameters covariances at first cluster |
135 | TMatrixD paramCov(5,5); | |
136 | paramCov.Zero(); | |
208f139e | 137 | // Non bending plane |
9bf6860b | 138 | paramCov(0,0) = firstCluster->GetErrX2(); |
139 | paramCov(0,1) = firstCluster->GetErrX2() / dZ; | |
140 | paramCov(1,0) = paramCov(0,1); | |
141 | paramCov(1,1) = ( firstCluster->GetErrX2() + lastCluster->GetErrX2() ) / dZ / dZ; | |
208f139e | 142 | // Bending plane |
9bf6860b | 143 | paramCov(2,2) = firstCluster->GetErrY2(); |
144 | paramCov(2,3) = firstCluster->GetErrY2() / dZ; | |
145 | paramCov(3,2) = paramCov(2,3); | |
146 | paramCov(3,3) = ( firstCluster->GetErrY2() + lastCluster->GetErrY2() ) / dZ / dZ; | |
147 | // Inverse bending momentum (vertex resolution + bending slope resolution + 10% error on dipole parameters+field) | |
89c8d66d | 148 | if (AliMUONTrackExtrap::IsFieldON()) { |
149 | paramCov(4,4) = ( ( bendingVertexDispersion*bendingVertexDispersion + | |
150 | (z1 * z1 * lastCluster->GetErrY2() + z2 * z2 * firstCluster->GetErrY2()) / dZ / dZ) / | |
151 | bendingImpact / bendingImpact + 0.1 * 0.1) * inverseBendingMomentum * inverseBendingMomentum ; | |
152 | paramCov(2,4) = - z2 * firstCluster->GetErrY2() * inverseBendingMomentum / bendingImpact / dZ; | |
153 | paramCov(4,2) = paramCov(2,4); | |
154 | paramCov(3,4) = - (z1 * lastCluster->GetErrY2() + z2 * firstCluster->GetErrY2()) * inverseBendingMomentum / bendingImpact / dZ / dZ; | |
155 | paramCov(4,3) = paramCov(3,4); | |
156 | } else paramCov(4,4) = inverseBendingMomentum*inverseBendingMomentum; | |
9bf6860b | 157 | trackParamAtFirstCluster.SetCovariances(paramCov); |
ea94c18b | 158 | |
9bf6860b | 159 | // Compute and set track parameters covariances at last cluster |
89c8d66d | 160 | // Non bending plane |
161 | paramCov(0,0) = lastCluster->GetErrX2(); | |
162 | paramCov(0,1) = - lastCluster->GetErrX2() / dZ; | |
163 | paramCov(1,0) = paramCov(0,1); | |
164 | // Bending plane | |
165 | paramCov(2,2) = lastCluster->GetErrY2(); | |
166 | paramCov(2,3) = - lastCluster->GetErrY2() / dZ; | |
167 | paramCov(3,2) = paramCov(2,3); | |
168 | // Inverse bending momentum (vertex resolution + bending slope resolution + 10% error on dipole parameters+field) | |
169 | if (AliMUONTrackExtrap::IsFieldON()) { | |
170 | paramCov(2,4) = z1 * lastCluster->GetErrY2() * inverseBendingMomentum / bendingImpact / dZ; | |
171 | paramCov(4,2) = paramCov(2,4); | |
172 | } | |
9bf6860b | 173 | trackParamAtLastCluster.SetCovariances(paramCov); |
ea94c18b | 174 | |
96ebe67e | 175 | // Add track parameters at clusters |
176 | AddTrackParamAtCluster(trackParamAtFirstCluster,*firstCluster); | |
177 | AddTrackParamAtCluster(trackParamAtLastCluster,*lastCluster); | |
de2cd600 | 178 | |
a9e2aefa | 179 | } |
180 | ||
61fed964 | 181 | //__________________________________________________________________________ |
96ebe67e | 182 | AliMUONTrack::AliMUONTrack(const AliMUONTrack& track) |
ea94c18b | 183 | : TObject(track), |
7332f213 | 184 | fTrackParamAtCluster(0x0), |
ea94c18b | 185 | fFitWithVertex(track.fFitWithVertex), |
96ebe67e | 186 | fVertexErrXY2(), |
ea94c18b | 187 | fFitWithMCS(track.fFitWithMCS), |
96ebe67e | 188 | fClusterWeightsNonBending(0x0), |
189 | fClusterWeightsBending(0x0), | |
ea94c18b | 190 | fGlobalChi2(track.fGlobalChi2), |
191 | fImproved(track.fImproved), | |
192 | fMatchTrigger(track.fMatchTrigger), | |
ea94c18b | 193 | fChi2MatchTrigger(track.fChi2MatchTrigger), |
194 | fTrackID(track.fTrackID), | |
96ebe67e | 195 | fTrackParamAtVertex(0x0), |
ea94c18b | 196 | fHitsPatternInTrigCh(track.fHitsPatternInTrigCh), |
5c15a68b | 197 | fLocalTrigger(track.fLocalTrigger), |
198 | fConnected(track.fConnected) | |
a9e2aefa | 199 | { |
2457f726 | 200 | ///copy constructor |
de2cd600 | 201 | |
e516b01d | 202 | // necessary to make a copy of the objects and not only the pointers in TClonesArray. |
7332f213 | 203 | if (track.fTrackParamAtCluster) { |
204 | fTrackParamAtCluster = new TClonesArray("AliMUONTrackParam",10); | |
205 | AliMUONTrackParam *trackParamAtCluster = (AliMUONTrackParam*) track.fTrackParamAtCluster->First(); | |
206 | while (trackParamAtCluster) { | |
207 | new ((*fTrackParamAtCluster)[GetNClusters()]) AliMUONTrackParam(*trackParamAtCluster); | |
208 | trackParamAtCluster = (AliMUONTrackParam*) track.fTrackParamAtCluster->After(trackParamAtCluster); | |
209 | } | |
208f139e | 210 | } |
211 | ||
96ebe67e | 212 | // copy vertex resolution square used during the tracking procedure |
213 | fVertexErrXY2[0] = track.fVertexErrXY2[0]; | |
214 | fVertexErrXY2[1] = track.fVertexErrXY2[1]; | |
208f139e | 215 | |
96ebe67e | 216 | // copy cluster weights matrices if any |
217 | if (track.fClusterWeightsNonBending) fClusterWeightsNonBending = new TMatrixD(*(track.fClusterWeightsNonBending)); | |
218 | if (track.fClusterWeightsBending) fClusterWeightsBending = new TMatrixD(*(track.fClusterWeightsBending)); | |
ea94c18b | 219 | |
96ebe67e | 220 | // copy track parameters at vertex if any |
221 | if (track.fTrackParamAtVertex) fTrackParamAtVertex = new AliMUONTrackParam(*(track.fTrackParamAtVertex)); | |
208f139e | 222 | |
a9e2aefa | 223 | } |
224 | ||
956019b6 | 225 | //__________________________________________________________________________ |
ea94c18b | 226 | AliMUONTrack & AliMUONTrack::operator=(const AliMUONTrack& track) |
a9e2aefa | 227 | { |
2457f726 | 228 | /// Asignment operator |
30178c30 | 229 | // check assignement to self |
ea94c18b | 230 | if (this == &track) |
a9e2aefa | 231 | return *this; |
61adb9bd | 232 | |
30178c30 | 233 | // base class assignement |
ea94c18b | 234 | TObject::operator=(track); |
7332f213 | 235 | |
236 | // clear memory | |
237 | Clear(); | |
238 | ||
239 | // necessary to make a copy of the objects and not only the pointers in TClonesArray | |
240 | if (track.fTrackParamAtCluster) { | |
241 | fTrackParamAtCluster = new TClonesArray("AliMUONTrackParam",10); | |
242 | AliMUONTrackParam *trackParamAtCluster = (AliMUONTrackParam*) track.fTrackParamAtCluster->First(); | |
243 | while (trackParamAtCluster) { | |
244 | new ((*fTrackParamAtCluster)[GetNClusters()]) AliMUONTrackParam(*trackParamAtCluster); | |
245 | trackParamAtCluster = (AliMUONTrackParam*) track.fTrackParamAtCluster->After(trackParamAtCluster); | |
246 | } | |
208f139e | 247 | } |
248 | ||
96ebe67e | 249 | // copy cluster weights matrix if any |
250 | if (track.fClusterWeightsNonBending) { | |
251 | if (fClusterWeightsNonBending) { | |
252 | fClusterWeightsNonBending->ResizeTo(*(track.fClusterWeightsNonBending)); | |
253 | *fClusterWeightsNonBending = *(track.fClusterWeightsNonBending); | |
254 | } else fClusterWeightsNonBending = new TMatrixD(*(track.fClusterWeightsNonBending)); | |
208f139e | 255 | } |
256 | ||
96ebe67e | 257 | // copy cluster weights matrix if any |
258 | if (track.fClusterWeightsBending) { | |
259 | if (fClusterWeightsBending) { | |
260 | fClusterWeightsBending->ResizeTo(*(track.fClusterWeightsBending)); | |
261 | *fClusterWeightsBending = *(track.fClusterWeightsBending); | |
262 | } else fClusterWeightsBending = new TMatrixD(*(track.fClusterWeightsBending)); | |
ea94c18b | 263 | } |
264 | ||
96ebe67e | 265 | // copy track parameters at vertex if any |
266 | if (track.fTrackParamAtVertex) { | |
267 | if (fTrackParamAtVertex) *fTrackParamAtVertex = *(track.fTrackParamAtVertex); | |
268 | else fTrackParamAtVertex = new AliMUONTrackParam(*(track.fTrackParamAtVertex)); | |
ea94c18b | 269 | } |
de2cd600 | 270 | |
ea94c18b | 271 | fFitWithVertex = track.fFitWithVertex; |
96ebe67e | 272 | fVertexErrXY2[0] = track.fVertexErrXY2[0]; |
273 | fVertexErrXY2[1] = track.fVertexErrXY2[1]; | |
ea94c18b | 274 | fFitWithMCS = track.fFitWithMCS; |
275 | fGlobalChi2 = track.fGlobalChi2; | |
276 | fImproved = track.fImproved; | |
277 | fMatchTrigger = track.fMatchTrigger; | |
ea94c18b | 278 | fChi2MatchTrigger = track.fChi2MatchTrigger; |
279 | fTrackID = track.fTrackID; | |
280 | fHitsPatternInTrigCh = track.fHitsPatternInTrigCh; | |
281 | fLocalTrigger = track.fLocalTrigger; | |
5c15a68b | 282 | fConnected = track.fConnected; |
30178c30 | 283 | |
61adb9bd | 284 | return *this; |
a9e2aefa | 285 | } |
286 | ||
8429a5e4 | 287 | //__________________________________________________________________________ |
ea94c18b | 288 | AliMUONTrack::~AliMUONTrack() |
289 | { | |
290 | /// Destructor | |
96ebe67e | 291 | delete fTrackParamAtCluster; |
292 | delete fClusterWeightsNonBending; | |
293 | delete fClusterWeightsBending; | |
294 | delete fTrackParamAtVertex; | |
ea94c18b | 295 | } |
296 | ||
297 | //__________________________________________________________________________ | |
298 | void AliMUONTrack::Clear(Option_t* opt) | |
299 | { | |
300 | /// Clear arrays | |
7332f213 | 301 | if (opt && opt[0] == 'C' && fTrackParamAtCluster) fTrackParamAtCluster->Clear("C"); |
302 | else { | |
303 | delete fTrackParamAtCluster; | |
304 | fTrackParamAtCluster = 0x0; | |
305 | } | |
96ebe67e | 306 | delete fClusterWeightsNonBending; fClusterWeightsNonBending = 0x0; |
307 | delete fClusterWeightsBending; fClusterWeightsBending = 0x0; | |
308 | delete fTrackParamAtVertex; fTrackParamAtVertex = 0x0; | |
ea94c18b | 309 | } |
310 | ||
b1fea02e | 311 | //__________________________________________________________________________ |
312 | void AliMUONTrack::Reset() | |
313 | { | |
314 | /// Reset to default values | |
315 | SetUniqueID(0); | |
316 | fFitWithVertex = kFALSE; | |
317 | fVertexErrXY2[0] = 0.; | |
318 | fVertexErrXY2[1] = 0.; | |
319 | fFitWithMCS = kFALSE; | |
320 | fGlobalChi2 = -1.; | |
321 | fImproved = kFALSE; | |
322 | fMatchTrigger = -1; | |
b1fea02e | 323 | fChi2MatchTrigger = 0.; |
2e2d0c44 | 324 | fTrackID = -1; |
b1fea02e | 325 | fHitsPatternInTrigCh = 0; |
326 | fLocalTrigger = 0; | |
5c15a68b | 327 | fConnected = kFALSE; |
b1fea02e | 328 | delete fTrackParamAtCluster; fTrackParamAtCluster = 0x0; |
329 | delete fClusterWeightsNonBending; fClusterWeightsNonBending = 0x0; | |
330 | delete fClusterWeightsBending; fClusterWeightsBending = 0x0; | |
331 | delete fTrackParamAtVertex; fTrackParamAtVertex = 0x0; | |
332 | } | |
333 | ||
7332f213 | 334 | //__________________________________________________________________________ |
335 | TClonesArray* AliMUONTrack::GetTrackParamAtCluster() const | |
336 | { | |
337 | /// return array of track parameters at cluster (create it if needed) | |
338 | if (!fTrackParamAtCluster) fTrackParamAtCluster = new TClonesArray("AliMUONTrackParam",10); | |
339 | return fTrackParamAtCluster; | |
340 | } | |
341 | ||
ea94c18b | 342 | //__________________________________________________________________________ |
96ebe67e | 343 | void AliMUONTrack::AddTrackParamAtCluster(const AliMUONTrackParam &trackParam, AliMUONVCluster &cluster, Bool_t copy) |
8429a5e4 | 344 | { |
96ebe67e | 345 | /// Copy given track parameters into a new TrackParamAtCluster |
346 | /// Link parameters with the associated cluster | |
347 | /// If copy=kTRUE: the cluster is copied then passed the trackParam which become its owner | |
348 | /// otherwise: make sure to do not delete the cluster until it is used by the track | |
349 | ||
350 | // check chamber ID of the associated cluster | |
351 | if (cluster.GetChamberId() < 0 || cluster.GetChamberId() > AliMUONConstants::NTrackingCh()) { | |
352 | AliError(Form("Chamber ID of the associated cluster is not valid (ChamberId=%d)",cluster.GetChamberId())); | |
ea94c18b | 353 | return; |
354 | } | |
355 | ||
96ebe67e | 356 | // check whether track parameters are given at the correct cluster z position |
357 | if (cluster.GetZ() != trackParam.GetZ()) { | |
358 | AliError("track parameters are given at a different z position than the one of the associated cluster"); | |
ea94c18b | 359 | return; |
360 | } | |
361 | ||
96ebe67e | 362 | // add parameters to the array of track parameters |
7332f213 | 363 | if (!fTrackParamAtCluster) fTrackParamAtCluster = new TClonesArray("AliMUONTrackParam",10); |
96ebe67e | 364 | AliMUONTrackParam* trackParamAtCluster = new ((*fTrackParamAtCluster)[GetNClusters()]) AliMUONTrackParam(trackParam); |
365 | ||
366 | // link parameters with the associated cluster or its copy | |
367 | if (copy) { | |
1467f4ba | 368 | AliMUONVCluster *clusterCopy = static_cast<AliMUONVCluster*>(cluster.Clone()); |
96ebe67e | 369 | trackParamAtCluster->SetClusterPtr(clusterCopy, kTRUE); |
370 | } else trackParamAtCluster->SetClusterPtr(&cluster); | |
7332f213 | 371 | |
372 | // sort the array of track parameters | |
373 | fTrackParamAtCluster->Sort(); | |
ea94c18b | 374 | } |
375 | ||
956019b6 | 376 | //__________________________________________________________________________ |
96ebe67e | 377 | void AliMUONTrack::RemoveTrackParamAtCluster(AliMUONTrackParam *trackParam) |
956019b6 | 378 | { |
96ebe67e | 379 | /// Remove trackParam from the array of TrackParamAtCluster |
7332f213 | 380 | if (!fTrackParamAtCluster || !fTrackParamAtCluster->Remove(trackParam)) { |
96ebe67e | 381 | AliWarning("object to remove does not exist in array fTrackParamAtCluster"); |
382 | return; | |
383 | } | |
de2cd600 | 384 | |
96ebe67e | 385 | fTrackParamAtCluster->Compress(); |
04b5ea16 | 386 | } |
387 | ||
ea94c18b | 388 | //__________________________________________________________________________ |
4ea3f013 | 389 | Bool_t AliMUONTrack::UpdateTrackParamAtCluster() |
d2b1e7bb | 390 | { |
96ebe67e | 391 | /// Update track parameters at each attached cluster |
4ea3f013 | 392 | /// Return kFALSE in case of failure (i.e. extrapolation problem) |
ea94c18b | 393 | |
96ebe67e | 394 | if (GetNClusters() == 0) { |
395 | AliWarning("no cluster attached to the track"); | |
4ea3f013 | 396 | return kFALSE; |
ea94c18b | 397 | } |
398 | ||
4ea3f013 | 399 | Bool_t extrapStatus = kTRUE; |
96ebe67e | 400 | AliMUONTrackParam* startingTrackParam = (AliMUONTrackParam*) fTrackParamAtCluster->First(); |
401 | AliMUONTrackParam* trackParamAtCluster = (AliMUONTrackParam*) fTrackParamAtCluster->After(startingTrackParam); | |
402 | while (trackParamAtCluster) { | |
ea94c18b | 403 | |
404 | // reset track parameters and their covariances | |
96ebe67e | 405 | trackParamAtCluster->SetParameters(startingTrackParam->GetParameters()); |
406 | trackParamAtCluster->SetZ(startingTrackParam->GetZ()); | |
ea94c18b | 407 | |
408 | // extrapolation to the given z | |
4ea3f013 | 409 | if (!AliMUONTrackExtrap::ExtrapToZ(trackParamAtCluster, trackParamAtCluster->GetClusterPtr()->GetZ())) extrapStatus = kFALSE; |
ea94c18b | 410 | |
411 | // prepare next step | |
96ebe67e | 412 | startingTrackParam = trackParamAtCluster; |
413 | trackParamAtCluster = (AliMUONTrackParam*) (fTrackParamAtCluster->After(trackParamAtCluster)); | |
ea94c18b | 414 | } |
415 | ||
4ea3f013 | 416 | // set global chi2 to max value in case of problem during track extrapolation |
417 | if (!extrapStatus) SetGlobalChi2(2.*MaxChi2()); | |
418 | return extrapStatus; | |
419 | ||
d2b1e7bb | 420 | } |
421 | ||
b8dc484b | 422 | //__________________________________________________________________________ |
4ea3f013 | 423 | Bool_t AliMUONTrack::UpdateCovTrackParamAtCluster() |
ea94c18b | 424 | { |
96ebe67e | 425 | /// Update track parameters and their covariances at each attached cluster |
426 | /// Include effects of multiple scattering in chambers | |
4ea3f013 | 427 | /// Return kFALSE in case of failure (i.e. extrapolation problem) |
ea94c18b | 428 | |
96ebe67e | 429 | if (GetNClusters() == 0) { |
430 | AliWarning("no cluster attached to the track"); | |
4ea3f013 | 431 | return kFALSE; |
ea94c18b | 432 | } |
433 | ||
4ea3f013 | 434 | Bool_t extrapStatus = kTRUE; |
96ebe67e | 435 | AliMUONTrackParam* startingTrackParam = (AliMUONTrackParam*) fTrackParamAtCluster->First(); |
436 | AliMUONTrackParam* trackParamAtCluster = (AliMUONTrackParam*) fTrackParamAtCluster->After(startingTrackParam); | |
437 | Int_t expectedChamber = startingTrackParam->GetClusterPtr()->GetChamberId() + 1; | |
438 | Int_t currentChamber; | |
439 | while (trackParamAtCluster) { | |
ea94c18b | 440 | |
441 | // reset track parameters and their covariances | |
96ebe67e | 442 | trackParamAtCluster->SetParameters(startingTrackParam->GetParameters()); |
443 | trackParamAtCluster->SetZ(startingTrackParam->GetZ()); | |
444 | trackParamAtCluster->SetCovariances(startingTrackParam->GetCovariances()); | |
ea94c18b | 445 | |
96ebe67e | 446 | // add MCS effect |
4663da9f | 447 | AliMUONTrackExtrap::AddMCSEffect(trackParamAtCluster,AliMUONConstants::ChamberThicknessInX0(expectedChamber-1),-1.); |
96ebe67e | 448 | |
449 | // add MCS in missing chambers if any | |
450 | currentChamber = trackParamAtCluster->GetClusterPtr()->GetChamberId(); | |
451 | while (currentChamber > expectedChamber) { | |
452 | // extrapolation to the missing chamber | |
4ea3f013 | 453 | if (!AliMUONTrackExtrap::ExtrapToZCov(trackParamAtCluster, AliMUONConstants::DefaultChamberZ(expectedChamber))) extrapStatus = kFALSE; |
96ebe67e | 454 | // add MCS effect |
4663da9f | 455 | AliMUONTrackExtrap::AddMCSEffect(trackParamAtCluster,AliMUONConstants::ChamberThicknessInX0(expectedChamber),-1.); |
96ebe67e | 456 | expectedChamber++; |
457 | } | |
458 | ||
459 | // extrapolation to the z of the current cluster | |
4ea3f013 | 460 | if (!AliMUONTrackExtrap::ExtrapToZCov(trackParamAtCluster, trackParamAtCluster->GetClusterPtr()->GetZ())) extrapStatus = kFALSE; |
ea94c18b | 461 | |
462 | // prepare next step | |
96ebe67e | 463 | expectedChamber = currentChamber + 1; |
464 | startingTrackParam = trackParamAtCluster; | |
465 | trackParamAtCluster = (AliMUONTrackParam*) (fTrackParamAtCluster->After(trackParamAtCluster)); | |
ea94c18b | 466 | } |
96ebe67e | 467 | |
4ea3f013 | 468 | // set global chi2 to max value in case of problem during track extrapolation |
469 | if (!extrapStatus) SetGlobalChi2(2.*MaxChi2()); | |
470 | return extrapStatus; | |
471 | ||
7332f213 | 472 | } |
473 | ||
474 | //__________________________________________________________________________ | |
f202486b | 475 | Bool_t AliMUONTrack::IsValid(UInt_t requestedStationMask, Bool_t request2ChInSameSt45) |
7332f213 | 476 | { |
3d7acbb7 | 477 | /// check the validity of the current track: |
478 | /// at least one cluster per requested station | |
479 | /// and at least 2 chambers in stations 4 & 5 that contain cluster(s) | |
f202486b | 480 | /// + if request2ChInSameSt45 = kTRUE: 2 chambers hit in the same station (4 or 5) |
7332f213 | 481 | |
482 | Int_t nClusters = GetNClusters(); | |
483 | AliMUONTrackParam *trackParam; | |
f202486b | 484 | Int_t currentCh, currentSt, previousCh = -1, nChHitInSt4 = 0, nChHitInSt5 = 0; |
ad3c6eda | 485 | UInt_t presentStationMask(0); |
7332f213 | 486 | |
3d7acbb7 | 487 | // first loop over clusters |
ad3c6eda | 488 | for (Int_t i = 0; i < nClusters; i++) { |
7332f213 | 489 | trackParam = (AliMUONTrackParam*) fTrackParamAtCluster->UncheckedAt(i); |
3d7acbb7 | 490 | |
491 | currentCh = trackParam->GetClusterPtr()->GetChamberId(); | |
492 | currentSt = currentCh/2; | |
493 | ||
494 | // build present station mask | |
495 | presentStationMask |= ( 1 << currentSt ); | |
496 | ||
f202486b | 497 | // count the number of chambers hit in station 4 that contain cluster(s) |
498 | if (currentSt == 3 && currentCh != previousCh) { | |
499 | nChHitInSt4++; | |
500 | previousCh = currentCh; | |
501 | } | |
502 | ||
503 | // count the number of chambers hit in station 5 that contain cluster(s) | |
504 | if (currentSt == 4 && currentCh != previousCh) { | |
505 | nChHitInSt5++; | |
3d7acbb7 | 506 | previousCh = currentCh; |
507 | } | |
508 | ||
7332f213 | 509 | } |
510 | ||
f202486b | 511 | // at least one cluster per requested station |
512 | if ((requestedStationMask & presentStationMask) != requestedStationMask) return kFALSE; | |
513 | ||
514 | // 2 chambers hit in the same station (4 or 5) | |
515 | if (request2ChInSameSt45) return (nChHitInSt4 == 2 || nChHitInSt5 == 2); | |
516 | // or 2 chambers hit in station 4 & 5 together | |
517 | else return (nChHitInSt4+nChHitInSt5 >= 2); | |
518 | ||
7332f213 | 519 | } |
520 | ||
521 | //__________________________________________________________________________ | |
a0dc65b4 | 522 | void AliMUONTrack::TagRemovableClusters(UInt_t requestedStationMask) { |
7332f213 | 523 | /// Identify clusters that can be removed from the track, |
3d7acbb7 | 524 | /// with the only requirements to have at least 1 cluster per requested station |
525 | /// and at least 2 chambers over 4 in stations 4 & 5 that contain cluster(s) | |
7332f213 | 526 | |
527 | Int_t nClusters = GetNClusters(); | |
528 | AliMUONTrackParam *trackParam, *nextTrackParam; | |
3d7acbb7 | 529 | Int_t currentCh, nextCh, currentSt, nextSt, previousCh = -1, nChHitInSt45 = 0; |
7332f213 | 530 | |
3d7acbb7 | 531 | // first loop over clusters |
7332f213 | 532 | for (Int_t i = 0; i < nClusters; i++) { |
533 | trackParam = (AliMUONTrackParam*) fTrackParamAtCluster->UncheckedAt(i); | |
3d7acbb7 | 534 | |
535 | currentCh = trackParam->GetClusterPtr()->GetChamberId(); | |
536 | currentSt = currentCh/2; | |
537 | ||
538 | // reset flags to kFALSE for all clusters in required station | |
539 | if ((1 << currentSt) & requestedStationMask) trackParam->SetRemovable(kFALSE); | |
9bf6860b | 540 | else trackParam->SetRemovable(kTRUE); |
3d7acbb7 | 541 | |
542 | // count the number of chambers in station 4 & 5 that contain cluster(s) | |
543 | if (currentCh > 5 && currentCh != previousCh) { | |
544 | nChHitInSt45++; | |
545 | previousCh = currentCh; | |
546 | } | |
547 | ||
7332f213 | 548 | } |
549 | ||
3d7acbb7 | 550 | // second loop over clusters |
7332f213 | 551 | for (Int_t i = 0; i < nClusters; i++) { |
552 | trackParam = (AliMUONTrackParam*) fTrackParamAtCluster->UncheckedAt(i); | |
553 | ||
554 | currentCh = trackParam->GetClusterPtr()->GetChamberId(); | |
3d7acbb7 | 555 | currentSt = currentCh/2; |
7332f213 | 556 | |
3d7acbb7 | 557 | // make sure they are more than 2 clusters in 2 different chambers of stations 4 & 5 |
558 | // but 2 clusters in he same chamber will still be flagged as removable | |
559 | if (nChHitInSt45 < 3 && currentSt > 2) { | |
7332f213 | 560 | |
3d7acbb7 | 561 | if (i == nClusters-1) { |
562 | ||
563 | trackParam->SetRemovable(kFALSE); | |
7332f213 | 564 | |
3d7acbb7 | 565 | } else { |
566 | ||
567 | nextTrackParam = (AliMUONTrackParam*) fTrackParamAtCluster->UncheckedAt(i+1); | |
568 | nextCh = nextTrackParam->GetClusterPtr()->GetChamberId(); | |
569 | ||
570 | // set clusters in the same chamber as being removable | |
571 | if (nextCh == currentCh) { | |
572 | trackParam->SetRemovable(kTRUE); | |
573 | nextTrackParam->SetRemovable(kTRUE); | |
574 | i++; // skip cluster already checked | |
575 | } else { | |
576 | trackParam->SetRemovable(kFALSE); | |
577 | } | |
578 | ||
579 | } | |
7332f213 | 580 | |
3d7acbb7 | 581 | } else { |
582 | ||
583 | // skip clusters already flag as removable | |
584 | if (trackParam->IsRemovable()) continue; | |
585 | ||
586 | // loop over next track parameters | |
587 | for (Int_t j = i+1; j < nClusters; j++) { | |
588 | nextTrackParam = (AliMUONTrackParam*) fTrackParamAtCluster->UncheckedAt(j); | |
589 | ||
590 | nextCh = nextTrackParam->GetClusterPtr()->GetChamberId(); | |
591 | nextSt = nextCh/2; | |
592 | ||
593 | // set clusters in the same station as being removable | |
594 | if (nextSt == currentSt) { | |
595 | trackParam->SetRemovable(kTRUE); | |
596 | nextTrackParam->SetRemovable(kTRUE); | |
597 | i++; // skip cluster already checked | |
598 | } | |
599 | ||
600 | } | |
7332f213 | 601 | |
602 | } | |
3d7acbb7 | 603 | |
7332f213 | 604 | } |
605 | ||
208f139e | 606 | } |
607 | ||
ea94c18b | 608 | //__________________________________________________________________________ |
609 | Bool_t AliMUONTrack::ComputeLocalChi2(Bool_t accountForMCS) | |
610 | { | |
96ebe67e | 611 | /// Compute each cluster contribution to the chi2 of the track |
ea94c18b | 612 | /// accounting for multiple scattering or not according to the flag |
96ebe67e | 613 | /// - Also recompute the weight matrices of the attached clusters if accountForMCS=kTRUE |
614 | /// - Assume that track parameters at each cluster are corrects | |
ea94c18b | 615 | /// - Return kFALSE if computation failed |
7332f213 | 616 | AliDebug(1,"Enter ComputeLocalChi2"); |
617 | ||
618 | if (!fTrackParamAtCluster) { | |
619 | AliWarning("no cluster attached to this track"); | |
620 | return kFALSE; | |
621 | } | |
ea94c18b | 622 | |
ea94c18b | 623 | if (accountForMCS) { // Compute local chi2 taking into account multiple scattering effects |
624 | ||
625 | // Compute MCS covariance matrix only once | |
96ebe67e | 626 | Int_t nClusters = GetNClusters(); |
627 | TMatrixD mcsCovariances(nClusters,nClusters); | |
ea94c18b | 628 | ComputeMCSCovariances(mcsCovariances); |
629 | ||
96ebe67e | 630 | // Make sure cluster weights are consistent with following calculations |
631 | if (!ComputeClusterWeights(&mcsCovariances)) { | |
ea94c18b | 632 | AliWarning("cannot take into account the multiple scattering effects"); |
633 | return ComputeLocalChi2(kFALSE); | |
634 | } | |
635 | ||
636 | // Compute chi2 of the track | |
637 | Double_t globalChi2 = ComputeGlobalChi2(kTRUE); | |
638 | if (globalChi2 < 0.) return kFALSE; | |
639 | ||
96ebe67e | 640 | // Loop over removable clusters and compute their local chi2 |
641 | AliMUONTrackParam* trackParamAtCluster1; | |
642 | AliMUONVCluster *cluster, *discardedCluster; | |
643 | Int_t iCluster1, iCluster2, iCurrentCluster1, iCurrentCluster2; | |
c812dd48 | 644 | TMatrixD clusterWeightsNB(nClusters-1,nClusters-1); |
645 | TMatrixD clusterWeightsB(nClusters-1,nClusters-1); | |
96ebe67e | 646 | Double_t *dX = new Double_t[nClusters-1]; |
647 | Double_t *dY = new Double_t[nClusters-1]; | |
ea94c18b | 648 | Double_t globalChi2b; |
96ebe67e | 649 | AliMUONTrackParam* trackParamAtCluster = (AliMUONTrackParam*) fTrackParamAtCluster->First(); |
650 | while (trackParamAtCluster) { | |
ea94c18b | 651 | |
96ebe67e | 652 | discardedCluster = trackParamAtCluster->GetClusterPtr(); |
ea94c18b | 653 | |
96ebe67e | 654 | // Recompute cluster weights without the current cluster |
c812dd48 | 655 | if (!ComputeClusterWeights(clusterWeightsNB, clusterWeightsB, &mcsCovariances, discardedCluster)) { |
ea94c18b | 656 | AliWarning("cannot take into account the multiple scattering effects"); |
96ebe67e | 657 | delete [] dX; |
658 | delete [] dY; | |
659 | return ComputeLocalChi2(kFALSE); | |
ea94c18b | 660 | } |
661 | ||
96ebe67e | 662 | // Compute track chi2 without the current cluster |
ea94c18b | 663 | globalChi2b = 0.; |
96ebe67e | 664 | iCurrentCluster1 = 0; |
665 | for (iCluster1 = 0; iCluster1 < nClusters ; iCluster1++) { | |
666 | trackParamAtCluster1 = (AliMUONTrackParam*) fTrackParamAtCluster->UncheckedAt(iCluster1); | |
667 | cluster = trackParamAtCluster1->GetClusterPtr(); | |
ea94c18b | 668 | |
96ebe67e | 669 | if (cluster == discardedCluster) continue; |
ea94c18b | 670 | |
671 | // Compute and save residuals | |
96ebe67e | 672 | dX[iCurrentCluster1] = cluster->GetX() - trackParamAtCluster1->GetNonBendingCoor(); |
673 | dY[iCurrentCluster1] = cluster->GetY() - trackParamAtCluster1->GetBendingCoor(); | |
ea94c18b | 674 | |
96ebe67e | 675 | iCurrentCluster2 = 0; |
676 | for (iCluster2 = 0; iCluster2 < iCluster1; iCluster2++) { | |
677 | cluster = ((AliMUONTrackParam*) fTrackParamAtCluster->UncheckedAt(iCluster2))->GetClusterPtr(); | |
ea94c18b | 678 | |
96ebe67e | 679 | if (cluster == discardedCluster) continue; |
ea94c18b | 680 | |
681 | // Add contribution from covariances | |
c812dd48 | 682 | globalChi2b += (clusterWeightsNB(iCurrentCluster1, iCurrentCluster2) + |
683 | clusterWeightsNB(iCurrentCluster2, iCurrentCluster1)) * dX[iCurrentCluster1] * dX[iCurrentCluster2] + | |
684 | (clusterWeightsB(iCurrentCluster1, iCurrentCluster2) + | |
685 | clusterWeightsB(iCurrentCluster2, iCurrentCluster1)) * dY[iCurrentCluster1] * dY[iCurrentCluster2]; | |
ea94c18b | 686 | |
96ebe67e | 687 | iCurrentCluster2++; |
ea94c18b | 688 | } |
689 | ||
690 | // Add contribution from variances | |
c812dd48 | 691 | globalChi2b += clusterWeightsNB(iCurrentCluster1, iCurrentCluster1) * dX[iCurrentCluster1] * dX[iCurrentCluster1] + |
692 | clusterWeightsB(iCurrentCluster1, iCurrentCluster1) * dY[iCurrentCluster1] * dY[iCurrentCluster1]; | |
ea94c18b | 693 | |
96ebe67e | 694 | iCurrentCluster1++; |
ea94c18b | 695 | } |
696 | ||
697 | // Set local chi2 | |
96ebe67e | 698 | trackParamAtCluster->SetLocalChi2(globalChi2 - globalChi2b); |
ea94c18b | 699 | |
96ebe67e | 700 | trackParamAtCluster = (AliMUONTrackParam*) fTrackParamAtCluster->After(trackParamAtCluster); |
ea94c18b | 701 | } |
702 | ||
703 | delete [] dX; | |
704 | delete [] dY; | |
705 | ||
706 | } else { // without multiple scattering effects | |
707 | ||
96ebe67e | 708 | AliMUONVCluster *discardedCluster; |
ea94c18b | 709 | Double_t dX, dY; |
96ebe67e | 710 | AliMUONTrackParam* trackParamAtCluster = (AliMUONTrackParam*) fTrackParamAtCluster->First(); |
711 | while (trackParamAtCluster) { | |
ea94c18b | 712 | |
96ebe67e | 713 | discardedCluster = trackParamAtCluster->GetClusterPtr(); |
ea94c18b | 714 | |
715 | // Compute residuals | |
96ebe67e | 716 | dX = discardedCluster->GetX() - trackParamAtCluster->GetNonBendingCoor(); |
717 | dY = discardedCluster->GetY() - trackParamAtCluster->GetBendingCoor(); | |
ea94c18b | 718 | |
719 | // Set local chi2 | |
96ebe67e | 720 | trackParamAtCluster->SetLocalChi2(dX * dX / discardedCluster->GetErrX2() + dY * dY / discardedCluster->GetErrY2()); |
ea94c18b | 721 | |
96ebe67e | 722 | trackParamAtCluster = (AliMUONTrackParam*) fTrackParamAtCluster->After(trackParamAtCluster); |
ea94c18b | 723 | } |
724 | ||
725 | } | |
726 | ||
ea94c18b | 727 | return kTRUE; |
728 | ||
729 | } | |
730 | ||
731 | //__________________________________________________________________________ | |
732 | Double_t AliMUONTrack::ComputeGlobalChi2(Bool_t accountForMCS) | |
733 | { | |
734 | /// Compute the chi2 of the track accounting for multiple scattering or not according to the flag | |
96ebe67e | 735 | /// - Assume that track parameters at each cluster are corrects |
736 | /// - Assume the cluster weights matrices are corrects | |
4ea3f013 | 737 | /// - Return a value of chi2 higher than the maximum allowed if computation failed |
7332f213 | 738 | AliDebug(1,"Enter ComputeGlobalChi2"); |
739 | ||
740 | if (!fTrackParamAtCluster) { | |
741 | AliWarning("no cluster attached to this track"); | |
4ea3f013 | 742 | return 2.*MaxChi2(); |
7332f213 | 743 | } |
ea94c18b | 744 | |
ea94c18b | 745 | Double_t chi2 = 0.; |
746 | ||
747 | if (accountForMCS) { | |
748 | ||
b709ac13 | 749 | // Check the weight matrices. If weight matrices are not available compute chi2 without MCS |
96ebe67e | 750 | if (!fClusterWeightsNonBending || !fClusterWeightsBending) { |
751 | AliWarning("cluster weights including multiple scattering effects are not available\n\t\t --> compute chi2 WITHOUT multiple scattering"); | |
b709ac13 | 752 | return ComputeGlobalChi2(kFALSE); |
753 | } | |
96ebe67e | 754 | Int_t nClusters = GetNClusters(); |
755 | if (fClusterWeightsNonBending->GetNrows() != nClusters || fClusterWeightsBending->GetNcols() != nClusters) { | |
756 | AliWarning("cluster weights including multiple scattering effects are not available\n\t\t --> compute chi2 WITHOUT multiple scattering"); | |
ea94c18b | 757 | return ComputeGlobalChi2(kFALSE); |
758 | } | |
759 | ||
760 | // Compute chi2 | |
96ebe67e | 761 | AliMUONVCluster *cluster; |
762 | Double_t *dX = new Double_t[nClusters]; | |
763 | Double_t *dY = new Double_t[nClusters]; | |
764 | AliMUONTrackParam* trackParamAtCluster; | |
765 | for (Int_t iCluster1 = 0; iCluster1 < nClusters; iCluster1++) { | |
766 | trackParamAtCluster = (AliMUONTrackParam*) fTrackParamAtCluster->UncheckedAt(iCluster1); | |
767 | cluster = trackParamAtCluster->GetClusterPtr(); | |
768 | dX[iCluster1] = cluster->GetX() - trackParamAtCluster->GetNonBendingCoor(); | |
769 | dY[iCluster1] = cluster->GetY() - trackParamAtCluster->GetBendingCoor(); | |
770 | for (Int_t iCluster2 = 0; iCluster2 < iCluster1; iCluster2++) { | |
771 | chi2 += ((*fClusterWeightsNonBending)(iCluster1, iCluster2) + (*fClusterWeightsNonBending)(iCluster2, iCluster1)) * dX[iCluster1] * dX[iCluster2] + | |
772 | ((*fClusterWeightsBending)(iCluster1, iCluster2) + (*fClusterWeightsBending)(iCluster2, iCluster1)) * dY[iCluster1] * dY[iCluster2]; | |
ea94c18b | 773 | } |
96ebe67e | 774 | chi2 += ((*fClusterWeightsNonBending)(iCluster1, iCluster1) * dX[iCluster1] * dX[iCluster1]) + |
775 | ((*fClusterWeightsBending)(iCluster1, iCluster1) * dY[iCluster1] * dY[iCluster1]); | |
ea94c18b | 776 | } |
777 | delete [] dX; | |
778 | delete [] dY; | |
779 | ||
780 | } else { | |
781 | ||
96ebe67e | 782 | AliMUONVCluster *cluster; |
ea94c18b | 783 | Double_t dX, dY; |
96ebe67e | 784 | AliMUONTrackParam* trackParamAtCluster; |
785 | Int_t nClusters = GetNClusters(); | |
786 | for (Int_t iCluster = 0; iCluster < nClusters ; iCluster++) { | |
787 | trackParamAtCluster = (AliMUONTrackParam*) fTrackParamAtCluster->UncheckedAt(iCluster); | |
788 | cluster = trackParamAtCluster->GetClusterPtr(); | |
789 | dX = cluster->GetX() - trackParamAtCluster->GetNonBendingCoor(); | |
790 | dY = cluster->GetY() - trackParamAtCluster->GetBendingCoor(); | |
791 | chi2 += dX * dX / cluster->GetErrX2() + dY * dY / cluster->GetErrY2(); | |
ea94c18b | 792 | } |
793 | ||
794 | } | |
795 | ||
796 | return chi2; | |
797 | ||
798 | } | |
799 | ||
800 | //__________________________________________________________________________ | |
96ebe67e | 801 | Bool_t AliMUONTrack::ComputeClusterWeights(TMatrixD* mcsCovariances) |
ea94c18b | 802 | { |
96ebe67e | 803 | /// Compute the weight matrices of the attached clusters, in non bending and bending direction, |
804 | /// accounting for multiple scattering correlations and cluster resolution | |
ea94c18b | 805 | /// - Use the provided MCS covariance matrix if any (otherwise build it temporarily) |
96ebe67e | 806 | /// - Assume that track parameters at each cluster are corrects |
ea94c18b | 807 | /// - Return kFALSE if computation failed |
7332f213 | 808 | AliDebug(1,"Enter ComputeClusterWeights1"); |
809 | ||
810 | if (!fTrackParamAtCluster) { | |
811 | AliWarning("no cluster attached to this track"); | |
812 | return kFALSE; | |
813 | } | |
ea94c18b | 814 | |
815 | // Alocate memory | |
96ebe67e | 816 | Int_t nClusters = GetNClusters(); |
817 | if (!fClusterWeightsNonBending) fClusterWeightsNonBending = new TMatrixD(nClusters,nClusters); | |
818 | if (!fClusterWeightsBending) fClusterWeightsBending = new TMatrixD(nClusters,nClusters); | |
ea94c18b | 819 | |
820 | // Compute weights matrices | |
96ebe67e | 821 | if (!ComputeClusterWeights(*fClusterWeightsNonBending, *fClusterWeightsBending, mcsCovariances)) return kFALSE; |
ea94c18b | 822 | |
823 | return kTRUE; | |
824 | ||
825 | } | |
826 | ||
827 | //__________________________________________________________________________ | |
c812dd48 | 828 | Bool_t AliMUONTrack::ComputeClusterWeights(TMatrixD& clusterWeightsNB, TMatrixD& clusterWeightsB, |
96ebe67e | 829 | TMatrixD* mcsCovariances, AliMUONVCluster* discardedCluster) const |
ea94c18b | 830 | { |
831 | /// Compute the weight matrices, in non bending and bending direction, | |
96ebe67e | 832 | /// of the other attached clusters assuming the discarded one does not exist |
833 | /// accounting for multiple scattering correlations and cluster resolution | |
ea94c18b | 834 | /// - Use the provided MCS covariance matrix if any (otherwise build it temporarily) |
835 | /// - Return kFALSE if computation failed | |
7332f213 | 836 | AliDebug(1,"Enter ComputeClusterWeights2"); |
ea94c18b | 837 | |
838 | // Check MCS covariance matrix and recompute it if need | |
96ebe67e | 839 | Int_t nClusters = GetNClusters(); |
ea94c18b | 840 | Bool_t deleteMCSCov = kFALSE; |
841 | if (!mcsCovariances) { | |
96ebe67e | 842 | mcsCovariances = new TMatrixD(nClusters,nClusters); |
ea94c18b | 843 | deleteMCSCov = kTRUE; |
844 | ComputeMCSCovariances(*mcsCovariances); | |
ea94c18b | 845 | } |
846 | ||
847 | // Resize the weights matrices; alocate memory | |
96ebe67e | 848 | if (discardedCluster) { |
c812dd48 | 849 | clusterWeightsNB.ResizeTo(nClusters-1,nClusters-1); |
850 | clusterWeightsB.ResizeTo(nClusters-1,nClusters-1); | |
ea94c18b | 851 | } else { |
c812dd48 | 852 | clusterWeightsNB.ResizeTo(nClusters,nClusters); |
853 | clusterWeightsB.ResizeTo(nClusters,nClusters); | |
ea94c18b | 854 | } |
855 | ||
856 | // Define variables | |
96ebe67e | 857 | AliMUONVCluster *cluster1, *cluster2; |
858 | Int_t iCurrentCluster1, iCurrentCluster2; | |
ea94c18b | 859 | |
860 | // Compute the covariance matrices | |
96ebe67e | 861 | iCurrentCluster1 = 0; |
862 | for (Int_t iCluster1 = 0; iCluster1 < nClusters; iCluster1++) { | |
863 | cluster1 = ((AliMUONTrackParam*) fTrackParamAtCluster->UncheckedAt(iCluster1))->GetClusterPtr(); | |
ea94c18b | 864 | |
96ebe67e | 865 | if (cluster1 == discardedCluster) continue; |
ea94c18b | 866 | |
96ebe67e | 867 | // Loop over next clusters |
868 | iCurrentCluster2 = iCurrentCluster1; | |
869 | for (Int_t iCluster2 = iCluster1; iCluster2 < nClusters; iCluster2++) { | |
870 | cluster2 = ((AliMUONTrackParam*) fTrackParamAtCluster->UncheckedAt(iCluster2))->GetClusterPtr(); | |
ea94c18b | 871 | |
96ebe67e | 872 | if (cluster2 == discardedCluster) continue; |
ea94c18b | 873 | |
ea94c18b | 874 | // Fill with MCS covariances |
c812dd48 | 875 | clusterWeightsNB(iCurrentCluster1, iCurrentCluster2) = (*mcsCovariances)(iCluster1,iCluster2); |
ea94c18b | 876 | |
877 | // Equal contribution from multiple scattering in non bending and bending directions | |
c812dd48 | 878 | clusterWeightsB(iCurrentCluster1, iCurrentCluster2) = clusterWeightsNB(iCurrentCluster1, iCurrentCluster2); |
ea94c18b | 879 | |
96ebe67e | 880 | // Add contribution from cluster resolution to diagonal element and symmetrize the matrix |
881 | if (iCurrentCluster1 == iCurrentCluster2) { | |
ea94c18b | 882 | |
883 | // In non bending plane | |
c812dd48 | 884 | clusterWeightsNB(iCurrentCluster1, iCurrentCluster1) += cluster1->GetErrX2(); |
ea94c18b | 885 | // In bending plane |
c812dd48 | 886 | clusterWeightsB(iCurrentCluster1, iCurrentCluster1) += cluster1->GetErrY2(); |
ea94c18b | 887 | |
888 | } else { | |
889 | ||
890 | // In non bending plane | |
c812dd48 | 891 | clusterWeightsNB(iCurrentCluster2, iCurrentCluster1) = clusterWeightsNB(iCurrentCluster1, iCurrentCluster2); |
ea94c18b | 892 | // In bending plane |
c812dd48 | 893 | clusterWeightsB(iCurrentCluster2, iCurrentCluster1) = clusterWeightsB(iCurrentCluster1, iCurrentCluster2); |
ea94c18b | 894 | |
895 | } | |
896 | ||
96ebe67e | 897 | iCurrentCluster2++; |
ea94c18b | 898 | } |
899 | ||
96ebe67e | 900 | iCurrentCluster1++; |
ea94c18b | 901 | } |
902 | ||
903 | // Inversion of covariance matrices to get the weights | |
c812dd48 | 904 | if (clusterWeightsNB.Determinant() != 0 && clusterWeightsB.Determinant() != 0) { |
905 | clusterWeightsNB.Invert(); | |
906 | clusterWeightsB.Invert(); | |
ea94c18b | 907 | } else { |
908 | AliWarning(" Determinant = 0"); | |
c812dd48 | 909 | clusterWeightsNB.ResizeTo(0,0); |
910 | clusterWeightsB.ResizeTo(0,0); | |
ea94c18b | 911 | if(deleteMCSCov) delete mcsCovariances; |
912 | return kFALSE; | |
913 | } | |
914 | ||
915 | if(deleteMCSCov) delete mcsCovariances; | |
916 | ||
917 | return kTRUE; | |
918 | ||
919 | } | |
920 | ||
921 | //__________________________________________________________________________ | |
922 | void AliMUONTrack::ComputeMCSCovariances(TMatrixD& mcsCovariances) const | |
923 | { | |
924 | /// Compute the multiple scattering covariance matrix | |
96ebe67e | 925 | /// (assume that track parameters at each cluster are corrects) |
7332f213 | 926 | AliDebug(1,"Enter ComputeMCSCovariances"); |
ea94c18b | 927 | |
b709ac13 | 928 | // Reset the size of the covariance matrix if needed |
96ebe67e | 929 | Int_t nClusters = GetNClusters(); |
930 | if (mcsCovariances.GetNrows() != nClusters) mcsCovariances.ResizeTo(nClusters,nClusters); | |
ea94c18b | 931 | |
932 | // Define variables | |
b709ac13 | 933 | Int_t nChambers = AliMUONConstants::NTrackingCh(); |
96ebe67e | 934 | AliMUONTrackParam* trackParamAtCluster; |
ea94c18b | 935 | AliMUONTrackParam extrapTrackParam; |
b709ac13 | 936 | Int_t currentChamber = 0, expectedChamber = 0, size = 0; |
937 | Double_t *mcsAngle2 = new Double_t[2*nChambers]; | |
938 | Double_t *zMCS = new Double_t[2*nChambers]; | |
96ebe67e | 939 | Int_t *indices = new Int_t[2*nClusters]; |
ea94c18b | 940 | |
941 | // Compute multiple scattering dispersion angle at each chamber | |
942 | // and save the z position where it is calculated | |
96ebe67e | 943 | for (Int_t iCluster = 0; iCluster < nClusters; iCluster++) { |
944 | trackParamAtCluster = (AliMUONTrackParam*) fTrackParamAtCluster->UncheckedAt(iCluster); | |
ea94c18b | 945 | |
946 | // look for missing chambers if any | |
96ebe67e | 947 | currentChamber = trackParamAtCluster->GetClusterPtr()->GetChamberId(); |
ea94c18b | 948 | while (currentChamber > expectedChamber) { |
949 | ||
950 | // Save the z position where MCS dispersion is calculated | |
b709ac13 | 951 | zMCS[size] = AliMUONConstants::DefaultChamberZ(expectedChamber); |
ea94c18b | 952 | |
96ebe67e | 953 | // Do not take into account MCS in chambers prior the first cluster |
954 | if (iCluster > 0) { | |
ea94c18b | 955 | |
956 | // Get track parameters at missing chamber z | |
96ebe67e | 957 | extrapTrackParam = *trackParamAtCluster; |
958 | AliMUONTrackExtrap::ExtrapToZ(&extrapTrackParam, zMCS[size]); | |
ea94c18b | 959 | |
960 | // Save multiple scattering dispersion angle in missing chamber | |
4663da9f | 961 | mcsAngle2[size] = AliMUONTrackExtrap::GetMCSAngle2(extrapTrackParam,AliMUONConstants::ChamberThicknessInX0(expectedChamber),1.); |
ea94c18b | 962 | |
b709ac13 | 963 | } else mcsAngle2[size] = 0.; |
ea94c18b | 964 | |
965 | expectedChamber++; | |
b709ac13 | 966 | size++; |
ea94c18b | 967 | } |
968 | ||
969 | // Save z position where MCS dispersion is calculated | |
96ebe67e | 970 | zMCS[size] = trackParamAtCluster->GetZ(); |
ea94c18b | 971 | |
972 | // Save multiple scattering dispersion angle in current chamber | |
4663da9f | 973 | mcsAngle2[size] = AliMUONTrackExtrap::GetMCSAngle2(*trackParamAtCluster,AliMUONConstants::ChamberThicknessInX0(currentChamber),1.); |
b709ac13 | 974 | |
975 | // Save indice in zMCS array corresponding to the current cluster | |
96ebe67e | 976 | indices[iCluster] = size; |
ea94c18b | 977 | |
b709ac13 | 978 | expectedChamber = currentChamber + 1; |
979 | size++; | |
ea94c18b | 980 | } |
981 | ||
96ebe67e | 982 | // complete array of z if last cluster is on the last but one chamber |
b709ac13 | 983 | if (currentChamber != nChambers-1) zMCS[size++] = AliMUONConstants::DefaultChamberZ(nChambers-1); |
ea94c18b | 984 | |
985 | // Compute the covariance matrix | |
96ebe67e | 986 | for (Int_t iCluster1 = 0; iCluster1 < nClusters; iCluster1++) { |
ea94c18b | 987 | |
96ebe67e | 988 | for (Int_t iCluster2 = iCluster1; iCluster2 < nClusters; iCluster2++) { |
ea94c18b | 989 | |
990 | // Initialization to 0 (diagonal plus upper triangular part) | |
96ebe67e | 991 | mcsCovariances(iCluster1,iCluster2) = 0.; |
ea94c18b | 992 | |
993 | // Compute contribution from multiple scattering in upstream chambers | |
96ebe67e | 994 | for (Int_t k = 0; k < indices[iCluster1]; k++) { |
995 | mcsCovariances(iCluster1,iCluster2) += (zMCS[indices[iCluster1]] - zMCS[k]) * (zMCS[indices[iCluster2]] - zMCS[k]) * mcsAngle2[k]; | |
ea94c18b | 996 | } |
997 | ||
998 | // Symetrize the matrix | |
96ebe67e | 999 | mcsCovariances(iCluster2,iCluster1) = mcsCovariances(iCluster1,iCluster2); |
ea94c18b | 1000 | } |
1001 | ||
1002 | } | |
1003 | ||
1004 | delete [] mcsAngle2; | |
1005 | delete [] zMCS; | |
b709ac13 | 1006 | delete [] indices; |
ea94c18b | 1007 | |
1008 | } | |
1009 | ||
208f139e | 1010 | //__________________________________________________________________________ |
5c15a68b | 1011 | Int_t AliMUONTrack::ClustersInCommon(AliMUONTrack* track, Int_t stMin, Int_t stMax) const |
208f139e | 1012 | { |
5c15a68b | 1013 | /// Returns the number of clusters in common in stations [stMin, stMax] |
89c8d66d | 1014 | /// between the current track ("this") and the track pointed to by "track". |
5c15a68b | 1015 | |
89c8d66d | 1016 | if (!fTrackParamAtCluster || !this->fTrackParamAtCluster) return 0; |
5c15a68b | 1017 | |
1018 | Int_t chMin = 2 * stMin; | |
1019 | Int_t chMax = 2 * stMax + 1; | |
89c8d66d | 1020 | Int_t clustersInCommon = 0; |
5c15a68b | 1021 | |
89c8d66d | 1022 | // Loop over clusters of first track |
5c15a68b | 1023 | Int_t nCl1 = this->GetNClusters(); |
1024 | for(Int_t iCl1 = 0; iCl1 < nCl1; iCl1++) { | |
1025 | AliMUONVCluster* cl1 = ((AliMUONTrackParam*) this->fTrackParamAtCluster->UncheckedAt(iCl1))->GetClusterPtr(); | |
1026 | ||
1027 | Int_t chCl1 = cl1->GetChamberId(); | |
1028 | if (chCl1 < chMin || chCl1 > chMax) continue; | |
1029 | ||
89c8d66d | 1030 | // Loop over clusters of second track |
5c15a68b | 1031 | Int_t nCl2 = track->GetNClusters(); |
1032 | for(Int_t iCl2 = 0; iCl2 < nCl2; iCl2++) { | |
1033 | AliMUONVCluster* cl2 = ((AliMUONTrackParam*) track->fTrackParamAtCluster->UncheckedAt(iCl2))->GetClusterPtr(); | |
1034 | ||
1035 | Int_t chCl2 = cl2->GetChamberId(); | |
1036 | if (chCl2 < chMin || chCl2 > chMax) continue; | |
1037 | ||
1038 | // Increment "clustersInCommon" if both clusters have the same ID | |
1039 | if (cl1->GetUniqueID() == cl2->GetUniqueID()) { | |
89c8d66d | 1040 | clustersInCommon++; |
1041 | break; | |
1042 | } | |
5c15a68b | 1043 | |
89c8d66d | 1044 | } |
5c15a68b | 1045 | |
89c8d66d | 1046 | } |
5c15a68b | 1047 | |
96ebe67e | 1048 | return clustersInCommon; |
208f139e | 1049 | } |
1050 | ||
5a240757 | 1051 | //__________________________________________________________________________ |
1052 | Int_t AliMUONTrack::GetNDF() const | |
1053 | { | |
1054 | /// return the number of degrees of freedom | |
1055 | ||
1056 | Int_t ndf = 2 * GetNClusters() - 5; | |
1057 | return (ndf > 0) ? ndf : 0; | |
1058 | } | |
1059 | ||
ea94c18b | 1060 | //__________________________________________________________________________ |
1061 | Double_t AliMUONTrack::GetNormalizedChi2() const | |
1062 | { | |
5a240757 | 1063 | /// return the chi2 value divided by the number of degrees of freedom (or FLT_MAX if ndf <= 0) |
ea94c18b | 1064 | |
5a240757 | 1065 | Double_t ndf = (Double_t) GetNDF(); |
4ea3f013 | 1066 | return (ndf > 0.) ? fGlobalChi2 / ndf : 2.*MaxChi2(); |
ea94c18b | 1067 | } |
1068 | ||
208f139e | 1069 | //__________________________________________________________________________ |
f202486b | 1070 | Int_t AliMUONTrack::FindCompatibleClusters(AliMUONTrack &track, Double_t sigmaCut, Bool_t compatibleCluster[10]) const |
b8dc484b | 1071 | { |
f202486b | 1072 | /// Try to match clusters from this track with clusters from the given track within the provided sigma cut: |
1073 | /// - Fill the array compatibleCluster[iCh] with kTRUE if a compatible cluster has been found in chamber iCh. | |
1074 | /// - Return the number of clusters of "this" track matched with one cluster of the given track. | |
96ebe67e | 1075 | AliMUONTrackParam *trackParamAtCluster1, *trackParamAtCluster2; |
1076 | AliMUONVCluster *cluster1, *cluster2; | |
c59f70b9 | 1077 | Double_t chi2, dX, dY; |
61fed964 | 1078 | Double_t chi2Max = sigmaCut * sigmaCut; |
96ebe67e | 1079 | |
c59f70b9 | 1080 | // initialization |
1081 | Int_t nMatchClusters = 0; | |
96ebe67e | 1082 | for ( Int_t ch = 0; ch < AliMUONConstants::NTrackingCh(); ch++) compatibleCluster[ch] = kFALSE; |
b8dc484b | 1083 | |
f202486b | 1084 | if (!track.fTrackParamAtCluster || !this->fTrackParamAtCluster) return nMatchClusters; |
7332f213 | 1085 | |
96ebe67e | 1086 | // Loop over clusters of first track |
1087 | trackParamAtCluster1 = (AliMUONTrackParam*) this->fTrackParamAtCluster->First(); | |
1088 | while (trackParamAtCluster1) { | |
1089 | ||
1090 | cluster1 = trackParamAtCluster1->GetClusterPtr(); | |
1091 | ||
1092 | // Loop over clusters of second track | |
f202486b | 1093 | trackParamAtCluster2 = (AliMUONTrackParam*) track.fTrackParamAtCluster->First(); |
96ebe67e | 1094 | while (trackParamAtCluster2) { |
1095 | ||
1096 | cluster2 = trackParamAtCluster2->GetClusterPtr(); | |
1097 | ||
1098 | //prepare next step | |
f202486b | 1099 | trackParamAtCluster2 = (AliMUONTrackParam*) track.fTrackParamAtCluster->After(trackParamAtCluster2); |
96ebe67e | 1100 | |
c59f70b9 | 1101 | // check DE Id |
1102 | if (cluster1->GetDetElemId() != cluster2->GetDetElemId()) continue; | |
96ebe67e | 1103 | |
2e2d0c44 | 1104 | // check local chi2 |
96ebe67e | 1105 | dX = cluster1->GetX() - cluster2->GetX(); |
96ebe67e | 1106 | dY = cluster1->GetY() - cluster2->GetY(); |
2e2d0c44 | 1107 | chi2 = dX * dX / (cluster1->GetErrX2() + cluster2->GetErrX2()) + dY * dY / (cluster1->GetErrY2() + cluster2->GetErrY2()); |
1108 | if (chi2 > 2. * chi2Max) continue; // 2 because 2 quantities in chi2 | |
96ebe67e | 1109 | |
1110 | compatibleCluster[cluster1->GetChamberId()] = kTRUE; | |
c59f70b9 | 1111 | nMatchClusters++; |
96ebe67e | 1112 | break; |
1113 | } | |
1114 | ||
1115 | trackParamAtCluster1 = (AliMUONTrackParam*) this->fTrackParamAtCluster->After(trackParamAtCluster1); | |
b8dc484b | 1116 | } |
1117 | ||
c59f70b9 | 1118 | return nMatchClusters; |
8429a5e4 | 1119 | } |
1120 | ||
f202486b | 1121 | //__________________________________________________________________________ |
1122 | Bool_t AliMUONTrack::Match(AliMUONTrack &track, Double_t sigmaCut, Int_t &nMatchClusters) const | |
1123 | { | |
1124 | /// Try to match this track with the given track. Matching conditions: | |
1125 | /// - more than 50% of clusters from this track matched with clusters from the given track | |
1126 | /// - at least 1 cluster matched before and 1 cluster matched after the dipole | |
1127 | ||
1128 | Bool_t compTrack[10]; | |
1129 | nMatchClusters = FindCompatibleClusters(track, sigmaCut, compTrack); | |
1130 | ||
1131 | if ((compTrack[0] || compTrack[1] || compTrack[2] || compTrack[3]) && // at least 1 cluster matched in st 1 & 2 | |
1132 | (compTrack[6] || compTrack[7] || compTrack[8] || compTrack[9]) && // at least 1 cluster matched in st 4 & 5 | |
1133 | 2 * nMatchClusters > GetNClusters()) return kTRUE; // more than 50% of clusters matched | |
1134 | else return kFALSE; | |
1135 | ||
1136 | } | |
1137 | ||
96ebe67e | 1138 | //__________________________________________________________________________ |
1139 | void AliMUONTrack::SetTrackParamAtVertex(const AliMUONTrackParam* trackParam) | |
1140 | { | |
1141 | /// set track parameters at vertex | |
1142 | if (trackParam == 0x0) return; | |
1143 | if (fTrackParamAtVertex) *fTrackParamAtVertex = *trackParam; | |
1144 | else fTrackParamAtVertex = new AliMUONTrackParam(*trackParam); | |
1145 | } | |
1146 | ||
1147 | //__________________________________________________________________________ | |
1148 | void AliMUONTrack::RecursiveDump() const | |
a9e2aefa | 1149 | { |
96ebe67e | 1150 | /// Recursive dump of AliMUONTrack, i.e. with dump of trackParamAtCluster and attached clusters |
1151 | AliMUONTrackParam *trackParamAtCluster; | |
1152 | AliMUONVCluster *cluster; | |
de2cd600 | 1153 | cout << "Recursive dump of Track: " << this << endl; |
1154 | // Track | |
1155 | this->Dump(); | |
96ebe67e | 1156 | for (Int_t iCluster = 0; iCluster < GetNClusters(); iCluster++) { |
1157 | trackParamAtCluster = (AliMUONTrackParam*) ((*fTrackParamAtCluster)[iCluster]); | |
1158 | // trackParamAtCluster | |
1159 | cout << "trackParamAtCluster: " << trackParamAtCluster << " (index: " << iCluster << ")" << endl; | |
1160 | trackParamAtCluster->Dump(); | |
1161 | cluster = trackParamAtCluster->GetClusterPtr(); | |
1162 | // cluster | |
1163 | cout << "cluster: " << cluster << endl; | |
1164 | cluster->Print(); | |
a9e2aefa | 1165 | } |
de2cd600 | 1166 | return; |
a9e2aefa | 1167 | } |
04b5ea16 | 1168 | |
6464217e | 1169 | //_____________________________________________- |
d2b1e7bb | 1170 | void AliMUONTrack::Print(Option_t*) const |
6464217e | 1171 | { |
2457f726 | 1172 | /// Printing Track information |
d2b1e7bb | 1173 | |
96ebe67e | 1174 | cout << "<AliMUONTrack> No.Clusters=" << setw(2) << GetNClusters() << |
6464217e | 1175 | ", Match2Trig=" << setw(1) << GetMatchTrigger() << |
bdfb6eef | 1176 | ", LoTrgNum=" << setw(3) << LoCircuit() << |
d2b1e7bb | 1177 | ", Chi2-tracking-trigger=" << setw(8) << setprecision(5) << GetChi2MatchTrigger(); |
2e2d0c44 | 1178 | cout << Form(" HitTriggerPattern %x",fHitsPatternInTrigCh); |
1179 | cout << Form(" MClabel=%d",fTrackID) << endl; | |
7332f213 | 1180 | if (fTrackParamAtCluster) fTrackParamAtCluster->First()->Print("FULL"); |
6464217e | 1181 | } |
423b32ca | 1182 | |
1183 | //__________________________________________________________________________ | |
00d46f24 | 1184 | void AliMUONTrack::SetLocalTrigger(Int_t loCirc, Int_t loStripX, Int_t loStripY, Int_t loDev, Int_t loLpt, Int_t loHpt, UChar_t respWithoutChamber) |
423b32ca | 1185 | { |
1186 | /// pack the local trigger information and store | |
1187 | ||
01413742 | 1188 | if (loCirc < 0) return; |
423b32ca | 1189 | |
1190 | fLocalTrigger = 0; | |
1191 | fLocalTrigger += loCirc; | |
1192 | fLocalTrigger += loStripX << 8; | |
1193 | fLocalTrigger += loStripY << 13; | |
1194 | fLocalTrigger += loDev << 17; | |
1195 | fLocalTrigger += loLpt << 22; | |
1196 | fLocalTrigger += loHpt << 24; | |
00d46f24 | 1197 | fLocalTrigger += respWithoutChamber << 26; |
423b32ca | 1198 | |
1199 | } | |
1200 | ||
2e2d0c44 | 1201 | //__________________________________________________________________________ |
1202 | void AliMUONTrack::FindMCLabel() | |
1203 | { | |
1204 | /// Determine the MC label from the label of the attached clusters and fill fMCLabel data member: | |
1205 | /// More than 50% of clusters, including 1 before and 1 after the dipole, must share the same label | |
1206 | ||
1207 | Int_t nClusters = GetNClusters(); | |
1208 | Int_t halfCluster = nClusters/2; | |
1209 | ||
1210 | // reset MC label | |
1211 | fTrackID = -1; | |
1212 | ||
1213 | // loop over first clusters (if nClusters left < (nClusters-halfCluster) the conditions cannot be fulfilled) | |
1214 | for (Int_t iCluster1 = 0; iCluster1 < nClusters-halfCluster; iCluster1++) { | |
1215 | AliMUONVCluster* cluster1 = ((AliMUONTrackParam*) fTrackParamAtCluster->UncheckedAt(iCluster1))->GetClusterPtr(); | |
1216 | ||
1217 | // if the first cluster is not on station 1 or 2 the conditions cannot be fulfilled | |
1218 | if (cluster1->GetChamberId() > 3) return; | |
1219 | ||
1220 | Int_t label1 = cluster1->GetMCLabel(); | |
1221 | if (label1 < 0) continue; | |
1222 | ||
1223 | Int_t nIdenticalLabel = 1; | |
1224 | ||
1225 | // Loop over next clusters | |
1226 | for (Int_t iCluster2 = iCluster1+1; iCluster2 < nClusters; iCluster2++) { | |
1227 | AliMUONVCluster* cluster2 = ((AliMUONTrackParam*) fTrackParamAtCluster->UncheckedAt(iCluster2))->GetClusterPtr(); | |
1228 | ||
1229 | if (cluster2->GetMCLabel() != label1) continue; | |
1230 | ||
1231 | nIdenticalLabel++; | |
1232 | ||
1233 | // stop as soon as conditions are fulfilled | |
1234 | if (nIdenticalLabel > halfCluster && cluster2->GetChamberId() > 5) { | |
1235 | fTrackID = label1; | |
1236 | return; | |
1237 | } | |
1238 | ||
1239 | } | |
1240 | ||
1241 | } | |
1242 | ||
1243 | } | |
1244 |