Increase maximum number of global constrains to 20
[u/mrichter/AliRoot.git] / MUON / MUONAlignment.C
CommitLineData
af9df62e 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// ---
19// Macro for MUON alignment using physics tracks. The macro uses AliMUONAlignment
20// class to calculate the alignment parameters.
21// An array for the alignment parameters is created and can be filled with
22// initial values that will be used as starting values by the alignment
23// algorithm.
24// Ny default the macro run over galice.root in the working directory. If a file list
25// of galice.root is provided as third argument the macro will run over all files.
26// The macro loop over the files, events and tracks. For each track
27// AliMUONAlignment::ProcessTrack(AliMUONTrack * track) and then
28// AliMUONAlignment::LocalFit(Int_t iTrack, Double_t *lTrackParam, Int_t
29// lSingleFit) are called. After all tracks have been procesed and fitted
30// AliMUONAlignment::GlobalFit(Double_t *parameters,Double_t *errors,Double_t *pulls)
31// is called. The array parameters contains the obatained misalignement parameters.
32// A realigned geometry is generated in a local CDB.
33//
34// Authors: B. Becker and J. Castillo
35// ---
36
59830a87 37void MUONAlignment(Int_t nEvents = 100000, char* geoFilename = "geometry.root", TString fileName = "galice.root", TString fileList = "")
af9df62e 38{
39
59830a87 40 // Import TGeo geometry (needed by AliMUONTrackExtrap::ExtrapToVertex)
41 if (!gGeoManager) {
42 TGeoManager::Import(geoFilename);
43 if (!gGeoManager) {
44 Error("MUONmass_ESD", "getting geometry from file %s failed", geoFilename);
45 return;
46 }
47 }
48
49 // set mag field
50 // waiting for mag field in CDB
51 printf("Loading field map...\n");
52 AliMagFMaps* field = new AliMagFMaps("Maps","Maps", 1, 1., 10., AliMagFMaps::k5kG);
53 AliTracker::SetFieldMap(field, kFALSE);
54 // set the magnetic field for track extrapolations
55 AliMUONTrackExtrap::SetField(AliTracker::GetFieldMap());
56
af9df62e 57 Double_t parameters[3*156];
58 Double_t errors[3*156];
59 Double_t pulls[3*156];
60 for(Int_t k=0;k<3*156;k++) {
61 parameters[k]=0.;
62 errors[k]=0.;
63 pulls[k]=0.;
64 }
65
66 Double_t trackParams[8] = {0.,0.,0.,0.,0.,0.,0.,0.};
67
68 Int_t iPar = 0;
69 // Set initial values here, good guess may help convergence
70 // St 1
71 // parameters[iPar++] = 0.010300 ; parameters[iPar++] = 0.010600 ; parameters[iPar++] = 0.000396 ;
72
73 bool bLoop = kFALSE;
74 ifstream sFileList;
75 if (fileList.Contains(".list")) {
76 cout << "Reading file list: " << fileList.Data() << endl;
77 bLoop = kTRUE;
78
79 TString fullListName(".");
80 fullListName +="/";
81 fullListName +=fileList;
82 sFileList.open(fileList.Data());
83 }
84
85 TH1F *fInvBenMom = new TH1F("fInvBenMom","fInvBenMom",200,-0.1,0.1);
86 TH1F *fBenMom = new TH1F("fBenMom","fBenMom",200,-40,40);
87
88 AliMUONAlignment* alig = new AliMUONAlignment();
89 alig->InitGlobalParameters(parameters);
90
91 AliMUONGeometryTransformer *transform = new AliMUONGeometryTransformer(true);
59830a87 92 transform->ReadGeometryData("volpath.dat", gGeoManager);
af9df62e 93 alig->SetGeometryTransformer(transform);
94
95 char cFileName[100];
96 AliMUONDataInterface amdi;
97
98 Int_t lMaxFile = 1000;
99 Int_t iFile = 0;
100 bool bKeepLoop = kTRUE;
101 while(bKeepLoop && iFile<lMaxFile){
102 iFile++;
103 if (bLoop) {
104 sFileList.getline(cFileName,100);
105 if (sFileList.eof()) bKeepLoop = kFALSE;
106 }
107 else {
108 sprintf(cFileName,fileName.Data());
109 bKeepLoop = kFALSE;
110 }
111 if (!strstr(cFileName,"galice.root")) continue;
112 cout << "Using file: " << cFileName << endl;
113 amdi.SetFile(cFileName);
114 Int_t nevents = amdi.NumberOfEvents();
115 for(Int_t event = 0; event < nevents; event++) {
116 amdi.GetEvent(event);
117 Int_t ntracks = amdi.NumberOfRecTracks();
118 cout << " there are " << ntracks << " tracks in event " << event << endl;
119 Int_t iTrack=0;
120 Int_t iTrackOk=0;
121 AliMUONTrack* track = amdi.RecTrack(iTrack);
122 while(track) {
8cde4af5 123 AliMUONTrackParam trackParam(*((AliMUONTrackParam*)(track->GetTrackParamAtHit()->First())));
124 AliMUONTrackExtrap::ExtrapToVertex(&trackParam,0.,0.,0.);
125 Double_t invBenMom = trackParam.GetInverseBendingMomentum();
af9df62e 126 fInvBenMom->Fill(invBenMom);
127 fBenMom->Fill(1./invBenMom);
128 if (TMath::Abs(invBenMom)<=1.04) {
129 cout << "Track " << iTrack << endl;
130 alig->ProcessTrack(track);
131 cout << "Calling LocalFit" << endl;
132 alig->LocalFit(iTrackOk++,trackParams,0);
133 }
134 iTrack++;
135 track = amdi.RecTrack(iTrack);
136 }
137 }
138 }
139 alig->GlobalFit(parameters,errors,pulls);
140
141 cout << "Done with GlobalFit " << endl;
142
143 // Store results
144 Double_t DEid[156] = {0};
145 Double_t MSDEx[156] = {0};
146 Double_t MSDEy[156] = {0};
147 Double_t MSDExt[156] = {0};
148 Double_t MSDEyt[156] = {0};
149 Double_t DEidErr[156] = {0};
150 Double_t MSDExErr[156] = {0};
151 Double_t MSDEyErr[156] = {0};
152 Double_t MSDExtErr[156] = {0};
153 Double_t MSDEytErr[156] = {0};
154 Int_t lNDetElem = 4*2+4*2+18*2+26*2+26*2;
155 Int_t lNDetElemCh[10] = {4,4,4,4,18,18,26,26,26,26};
156 Int_t lSNDetElemCh[10] = {4,8,12,16,34,52,78,104,130,156};
157 Int_t idOffset = 0; // 400
158 Int_t lSDetElemCh = 0;
159 for(Int_t iDE=0; iDE<lNDetElem; iDE++){
160 DEidErr[iDE] = 0.;
161 DEid[iDE] = idOffset+100;
162 DEid[iDE] += iDE;
163 lSDetElemCh = 0;
164 for(Int_t iCh=0; iCh<9; iCh++){
165 lSDetElemCh += lNDetElemCh[iCh];
166 if (iDE>=lSDetElemCh) {
167 DEid[iDE] += 100;
168 DEid[iDE] -= lNDetElemCh[iCh];
169 }
170 }
171 MSDEx[iDE]=parameters[3*iDE+0];
172 MSDEy[iDE]=parameters[3*iDE+1];
173 MSDExt[iDE]=parameters[3*iDE+2];
174 MSDEyt[iDE]=parameters[3*iDE+2];
175 MSDExErr[iDE]=(Double_t)alig->GetParError(3*iDE+0);
176 MSDEyErr[iDE]=(Double_t)alig->GetParError(3*iDE+1);
177 MSDExtErr[iDE]=(Double_t)alig->GetParError(3*iDE+2);
178 MSDEytErr[iDE]=(Double_t)alig->GetParError(3*iDE+2);
179 }
180
181 cout << "Let's create graphs ... " << endl;
182
183 TGraphErrors *gMSDEx = new TGraphErrors(lNDetElem,DEid,MSDEx,DEidErr,MSDExErr);
184 TGraphErrors *gMSDEy = new TGraphErrors(lNDetElem,DEid,MSDEy,DEidErr,MSDEyErr);
185 TGraphErrors *gMSDExt = new TGraphErrors(lNDetElem,DEid,MSDExt,DEidErr,MSDExtErr);
186 TGraphErrors *gMSDEyt = new TGraphErrors(lNDetElem,DEid,MSDEyt,DEidErr,MSDEytErr);
187
188 cout << "... graphs created, open file ... " << endl;
189
190 TFile *hFile = new TFile("measShifts.root","RECREATE");
191
192 cout << "... file opened ... " << endl;
193
194 gMSDEx->Write("gMSDEx");
195 gMSDEy->Write("gMSDEy");
196 gMSDExt->Write("gMSDExt");
197 gMSDEyt->Write("gMSDEyt");
198 fInvBenMom->Write();
199 fBenMom->Write();
200 hFile->Close();
201
202 cout << "... and closed!" << endl;
203 // Re Align
204 AliMUONGeometryTransformer *newTransform = alig->ReAlign(transform,parameters,true);
205 newTransform->WriteTransformations("transform2ReAlign.dat");
206
207 // Generate realigned data in local cdb
208 TClonesArray* array = newTransform->GetMisAlignmentData();
209
210 // CDB manager
211 AliCDBManager* cdbManager = AliCDBManager::Instance();
212 cdbManager->SetDefaultStorage("local://ReAlignCDB");
213
214 AliCDBMetaData* cdbData = new AliCDBMetaData();
215 cdbData->SetResponsible("Dimuon Offline project");
216 cdbData->SetComment("MUON alignment objects with residual misalignment");
217 AliCDBId id("MUON/Align/Data", 0, 0);
218 cdbManager->Put(array, id, cdbData);
219
220}