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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 | ||
16 | // $Id$ | |
17 | ||
18 | /// \ingroup macros | |
19 | /// \file MUONRecoCheck.C | |
20 | /// \brief Utility macro to check the muon reconstruction. | |
21 | /// | |
22 | /// Reconstructed tracks are compared to reference tracks. The reference tracks | |
23 | /// are built from AliTrackReference for the hit in chamber (0..9) and from | |
24 | /// kinematics (TreeK) for the vertex parameters. | |
25 | /// | |
26 | /// \author Jean-Pierre Cussonneau, Subatech | |
27 | ||
28 | // ROOT includes | |
29 | #include "TClonesArray.h" | |
30 | #include "TH1.h" | |
31 | #include "TFile.h" | |
32 | #include <TGeoManager.h> | |
33 | ||
34 | // STEER includes | |
35 | #include "AliRun.h" | |
36 | #include "AliHeader.h" | |
37 | #include "AliMC.h" | |
38 | #include "AliStack.h" | |
39 | #include "AliMagF.h" | |
40 | #include "AliTracker.h" | |
41 | ||
42 | // MUON includes | |
43 | #include "AliMUONConstants.h" | |
44 | #include "AliMUONTrack.h" | |
45 | #include "AliMUONRecoCheck.h" | |
46 | #include "AliMUONTrackParam.h" | |
47 | #include "AliMUONTrackExtrap.h" | |
48 | #include "AliMUONVTrackStore.h" | |
49 | ||
50 | Int_t TrackCheck( Bool_t *compTrack); | |
51 | ||
52 | void MUONRecoCheck (Int_t nEvent = -1, char* geoFilename = "geometry.root", | |
53 | char * pathSim="./generated/", char * esdFileName="AliESDs.root") | |
54 | { | |
55 | ||
56 | Bool_t compTrack[10]; | |
57 | Bool_t compTrackOK[10]; | |
58 | Int_t nClusterOk = 0; | |
59 | Int_t testTrack = 0; | |
60 | Int_t iTrack = 0; | |
61 | AliMUONTrack* trackOK(0x0); | |
62 | Int_t trackID = 0; | |
63 | Double_t sigmaCut = 4.; // 4 sigmas cut | |
64 | Double_t maxChi2 = 999.; | |
65 | AliMUONTrackParam *trackParam; | |
66 | Double_t x1,y1,z1,pX1,pY1,pZ1,p1; | |
67 | Double_t x2,y2,z2,pX2,pY2,pZ2,p2; | |
68 | ||
69 | // File for histograms and histogram booking | |
70 | TFile *histoFile = new TFile("MUONRecoCheck.root", "RECREATE"); | |
71 | ||
72 | TH1F *hReconstructible = new TH1F("hReconstructible"," Nb of reconstructible tracks ",15,-0.5,14.5); | |
73 | TH1F *hReco = new TH1F("hReco"," Nb of reconstructed tracks / evt",15,-0.5,14.5); | |
74 | TH1F *hNClusterComp = new TH1F("hNClusterComp"," Nb of compatible clusters / track ",15,-0.5,14.5); | |
75 | TH1F *hTestTrack = new TH1F("hTestTrack"," Reconstruction requirement / track",15,-0.5,14.5); | |
76 | TH1F *hTrackRefID = new TH1F("hTrackRefID"," track reference ID ",100,-0.5,99.5); | |
77 | ||
78 | TH1F *hResMomVertex = new TH1F("hResMomVertex"," delta P vertex (GeV/c)",100,-10.,10); | |
79 | TH1F *hResMomFirstCluster = new TH1F("hResMomFirstCluster"," delta P first cluster (GeV/c)",100,-10.,10); | |
80 | ||
81 | // Import TGeo geometry (needed by AliMUONTrackExtrap::ExtrapToVertex) | |
82 | if (!gGeoManager) { | |
83 | TGeoManager::Import(geoFilename); | |
84 | if (!gGeoManager) { | |
85 | Error("MUONmass_ESD", "getting geometry from file %s failed", geoFilename); | |
86 | return; | |
87 | } | |
88 | } | |
89 | ||
90 | // set mag field | |
91 | // waiting for mag field in CDB | |
92 | if (!TGeoGlobalMagField::Instance()->GetField()) { | |
93 | printf("Loading field map...\n"); | |
94 | AliMagF* field = new AliMagF("Maps","Maps",2,1.,1., 10.,AliMagF::k5kG); | |
95 | TGeoGlobalMagField::Instance()->SetField(field); | |
96 | } | |
97 | // set the magnetic field for track extrapolations | |
98 | AliMUONTrackExtrap::SetField(); | |
99 | ||
100 | AliMUONRecoCheck rc(esdFileName, pathSim); | |
101 | ||
102 | Int_t nevents = rc.NumberOfEvents(); | |
103 | ||
104 | if (nevents < nEvent || nEvent < 0) nEvent = nevents; | |
105 | ||
106 | Int_t ievent; | |
107 | Int_t nReconstructibleTracks = 0; | |
108 | Int_t nReconstructedTracks = 0; | |
109 | Int_t nReconstructibleTracksCheck = 0; | |
110 | ||
111 | for (ievent=0; ievent<nEvent; ievent++) | |
112 | { | |
113 | if (!(ievent%10)) printf(" **** event # %d \n",ievent); | |
114 | ||
115 | AliMUONVTrackStore* trackStore = rc.ReconstructedTracks(ievent); | |
116 | AliMUONVTrackStore* trackRefStore = rc.ReconstructibleTracks(ievent); | |
117 | ||
118 | hReconstructible->Fill(trackRefStore->GetSize()); | |
119 | hReco->Fill(trackStore->GetSize()); | |
120 | ||
121 | nReconstructibleTracks += trackRefStore->GetSize(); | |
122 | nReconstructedTracks += trackStore->GetSize(); | |
123 | ||
124 | TIter next(trackRefStore->CreateIterator()); | |
125 | AliMUONTrack* trackRef; | |
126 | ||
127 | while ( ( trackRef = static_cast<AliMUONTrack*>(next()) ) ) | |
128 | { | |
129 | maxChi2 = 999.; | |
130 | testTrack = 0; | |
131 | trackOK = 0x0; | |
132 | for (Int_t ch = 0; ch < AliMUONConstants::NTrackingCh(); ch++) | |
133 | { | |
134 | compTrackOK[ch] = kFALSE; | |
135 | } | |
136 | ||
137 | TIter next2(trackStore->CreateIterator()); | |
138 | AliMUONTrack* trackReco; | |
139 | ||
140 | while ( ( trackReco = static_cast<AliMUONTrack*>(next2()) ) ) | |
141 | { | |
142 | // check if trackRef is compatible with trackReco | |
143 | if (trackReco->GetNClusters() > 1) { | |
144 | ||
145 | // check cluster by cluster if trackReco contain info at each cluster | |
146 | trackRef->CompatibleTrack(trackReco,sigmaCut,compTrack); | |
147 | ||
148 | iTrack = TrackCheck(compTrack); | |
149 | ||
150 | if (iTrack > testTrack) | |
151 | { | |
152 | nClusterOk = 0; | |
153 | for (Int_t ch = 0; ch < AliMUONConstants::NTrackingCh(); ch++) | |
154 | { | |
155 | if (compTrack[ch]) nClusterOk++; | |
156 | compTrackOK[ch] = compTrack[ch]; | |
157 | } | |
158 | testTrack = iTrack; | |
159 | trackOK = trackReco; | |
160 | } | |
161 | ||
162 | } else { | |
163 | ||
164 | // check only parameters at the z position of the first trackRef | |
165 | AliMUONTrackParam *refParam = (AliMUONTrackParam*) trackRef->GetTrackParamAtCluster()->First(); | |
166 | AliMUONTrackParam recoParam(*((AliMUONTrackParam*) trackReco->GetTrackParamAtCluster()->First())); | |
167 | AliMUONTrackExtrap::ExtrapToZCov(&recoParam, refParam->GetZ()); | |
168 | Double_t chi2; | |
169 | if (refParam->CompatibleTrackParam(recoParam, sigmaCut, chi2)) { | |
170 | ||
171 | if (chi2 < maxChi2) { | |
172 | maxChi2 = chi2; | |
173 | trackOK = trackReco; | |
174 | } | |
175 | ||
176 | } | |
177 | ||
178 | } | |
179 | ||
180 | } | |
181 | ||
182 | hTestTrack->Fill(testTrack); | |
183 | trackID = trackRef->GetMCLabel(); | |
184 | hTrackRefID->Fill(trackID); | |
185 | ||
186 | if (testTrack == 4 || maxChi2 < 5.*sigmaCut*sigmaCut) { // tracking requirements verified, track is found | |
187 | nReconstructibleTracksCheck++; | |
188 | hNClusterComp->Fill(nClusterOk); | |
189 | trackParam = trackRef->GetTrackParamAtVertex(); | |
190 | x1 = trackParam->GetNonBendingCoor(); | |
191 | y1 = trackParam->GetBendingCoor(); | |
192 | z1 = trackParam->GetZ(); | |
193 | pX1 = trackParam->Px(); | |
194 | pY1 = trackParam->Py(); | |
195 | pZ1 = trackParam->Pz(); | |
196 | p1 = trackParam->P(); | |
197 | ||
198 | // printf(" Ref. track at vertex: x,y,z: %f %f %f px,py,pz,p: %f %f %f %f \n",x1,y1,z1,pX1,pY1,pZ1,p1); | |
199 | trackReco = trackOK; | |
200 | trackParam = new AliMUONTrackParam(*((AliMUONTrackParam*)(trackReco->GetTrackParamAtVertex()))); | |
201 | x2 = trackParam->GetNonBendingCoor(); | |
202 | y2 = trackParam->GetBendingCoor(); | |
203 | z2 = trackParam->GetZ(); | |
204 | pX2 = trackParam->Px(); | |
205 | pY2 = trackParam->Py(); | |
206 | pZ2 = trackParam->Pz(); | |
207 | p2 = trackParam->P(); | |
208 | delete trackParam; | |
209 | // printf(" Reconst. track at vertex: x,y,z: %f %f %f px,py,pz: %f %f %f %f \n",x2,y2,z2,pX2,pY2,pZ2,p2); | |
210 | ||
211 | hResMomVertex->Fill(p2-p1); | |
212 | ||
213 | trackParam = (AliMUONTrackParam*) trackRef->GetTrackParamAtCluster()->First(); | |
214 | x1 = trackParam->GetNonBendingCoor(); | |
215 | y1 = trackParam->GetBendingCoor(); | |
216 | z1 = trackParam->GetZ(); | |
217 | pX1 = trackParam->Px(); | |
218 | pY1 = trackParam->Py(); | |
219 | pZ1 = trackParam->Pz(); | |
220 | p1 = trackParam->P(); | |
221 | // printf(" Ref. track at 1st cluster: x,y,z: %f %f %f px,py,pz: %f %f %f \n",x1,y1,z1,pX1,pY1,pZ1); | |
222 | trackParam = (AliMUONTrackParam*) trackOK->GetTrackParamAtCluster()->First(); | |
223 | x2 = trackParam->GetNonBendingCoor(); | |
224 | y2 = trackParam->GetBendingCoor(); | |
225 | z2 = trackParam->GetZ(); | |
226 | pX2 = trackParam->Px(); | |
227 | pY2 = trackParam->Py(); | |
228 | pZ2 = trackParam->Pz(); | |
229 | p2 = trackParam->P(); | |
230 | // printf(" Reconst. track at 1st cluster: x,y,z: %f %f %f px,py,pz: %f %f %f \n",x2,y2,z2,pX2,pY2,pZ2); | |
231 | ||
232 | hResMomFirstCluster->Fill(p2-p1); | |
233 | ||
234 | } | |
235 | } // end loop track ref. | |
236 | ||
237 | } // end loop on event | |
238 | ||
239 | printf(" nb of reconstructible tracks: %d \n", nReconstructibleTracks); | |
240 | printf(" nb of reconstructed tracks: %d \n", nReconstructedTracks); | |
241 | printf(" nb of reconstructible tracks which are reconstructed: %d \n", nReconstructibleTracksCheck); | |
242 | ||
243 | histoFile->Write(); | |
244 | histoFile->Close(); | |
245 | } | |
246 | ||
247 | ||
248 | Int_t TrackCheck( Bool_t *compTrack) | |
249 | { | |
250 | // Apply reconstruction requirements | |
251 | // Return number of validated conditions | |
252 | // If all the tests are verified then TrackCheck = 4 (good track) | |
253 | Int_t iTrack = 0; | |
254 | Int_t nCompClustersInLastStations = 0; | |
255 | ||
256 | // apply reconstruction requirements | |
257 | if (compTrack[0] || compTrack[1]) iTrack++; // at least one compatible cluster in st. 0 | |
258 | if (compTrack[2] || compTrack[3]) iTrack++; // at least one compatible cluster in st. 1 | |
259 | if (compTrack[4] || compTrack[5]) iTrack++; // at least one compatible cluster in st. 2 | |
260 | for (Int_t ch = 6; ch < AliMUONConstants::NTrackingCh(); ch++) { | |
261 | if (compTrack[ch]) nCompClustersInLastStations++; | |
262 | } | |
263 | if (nCompClustersInLastStations > 2) iTrack++; // at least 3 compatible clusters in st. 3 & 4 | |
264 | ||
265 | return iTrack; | |
266 | ||
267 | } | |
268 |