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95958115 | 1 | #if !defined(__CINT__) || defined(__MAKECINT__)\r |
2 | #include <Riostream.h>\r | |
3 | #include <TChain.h>\r | |
4 | #include <TClonesArray.h>\r | |
5 | #include <TFile.h>\r | |
6 | #include <TMath.h>\r | |
7 | #include <TStopwatch.h>\r | |
8 | #include "AliAlignObjParams.h"\r | |
9 | #include "AliTrackPointArray.h"\r | |
10 | #include "AliITSAlignMille.h"\r | |
11 | #endif\r | |
12 | //********************************************************************\r | |
13 | // Example to run ITS alignment using Millepede\r | |
14 | //\r | |
15 | // Read tracks from AliTrackPoints.N.root and fill Millepede.\r | |
16 | // Millepede configuration is taken from AliITSAlignMille.conf\r | |
17 | // Results are written as AliAlignObjParams in outfile.\r | |
18 | //\r | |
19 | // Origin: M. Lunardon\r | |
20 | //********************************************************************\r | |
21 | \r | |
22 | Bool_t SelectLayers(AliTrackPointArray *tpa, int *nreqpts_lay) {\r | |
23 | // selection on layers\r | |
24 | int npts=tpa->GetNPoints();\r | |
25 | int nlay[6]; \r | |
26 | for (int jj=0;jj<6;jj++) nlay[jj]=0;\r | |
27 | for (int ip=0; ip<npts; ip++) {\r | |
28 | int lay=-1;\r | |
29 | float r=TMath::Sqrt(tpa->GetX()[ip]*tpa->GetX()[ip] + tpa->GetY()[ip]*tpa->GetY()[ip]);\r | |
30 | if (r<5) lay=1;\r | |
31 | else if (r>5 && r<10) lay=2;\r | |
32 | else if (r>10 && r<18) lay=3;\r | |
33 | else if (r>18 && r<30) lay=4;\r | |
34 | else if (r>30 && r<40) lay=5;\r | |
35 | else if (r>40) lay=6;\r | |
36 | if (lay<0) continue;\r | |
37 | nlay[lay-1]++;\r | |
38 | }\r | |
39 | Bool_t isgood=1;\r | |
40 | for (int jj=0; jj<6; jj++) {\r | |
41 | if (nlay[jj]<nreqpts_lay[jj]) isgood=0;\r | |
42 | }\r | |
43 | return isgood;\r | |
44 | }\r | |
45 | //////////////////////////////////////\r | |
46 | \r | |
47 | int ITSAlignMille(int fromev=1, int toev=200, int maxentries=-1, char *outfile="ITSAlignMille.root") {\r | |
48 | \r | |
49 | // Read tracks from AliTrackPoints.N.root and fill Millepede.\r | |
50 | // Millepede results are written as AliAlignObjParams in outfile.\r | |
51 | \r | |
52 | int nreqpts=6;\r | |
53 | int nreqpts_lay[6]={0,0,0,0,0,0};\r | |
54 | \r | |
55 | TFile *fout=new TFile(outfile,"recreate");\r | |
56 | if (!fout->IsOpen()) {\r | |
57 | printf("\nCannot open output file!\n");\r | |
58 | return -1;\r | |
59 | }\r | |
60 | \r | |
61 | TChain *chain=new TChain("spTree"); \r | |
62 | char dir[100]="AliTrackPoints";\r | |
63 | char st[200];\r | |
64 | \r | |
65 | for (int iev=fromev; iev<=toev; iev++) {\r | |
66 | sprintf(st,"%s/AliTrackPoints.%d.root",dir,iev);\r | |
67 | chain->Add(st);\r | |
68 | }\r | |
69 | \r | |
70 | int nentries=chain->GetEntries();\r | |
71 | printf("There are %d entries in chain\n",nentries);\r | |
72 | \r | |
73 | if (maxentries>0 && maxentries<nentries) nentries=maxentries;\r | |
74 | \r | |
75 | AliTrackPointArray *tpa = 0;\r | |
76 | chain->SetBranchAddress("SP", &tpa);\r | |
77 | \r | |
78 | ////////////////////////////////////////////\r | |
79 | \r | |
80 | AliITSAlignMille *alig = new AliITSAlignMille("AliITSAlignMille.conf");\r | |
81 | \r | |
82 | Int_t nmod=alig->GetNModules();\r | |
83 | \r | |
84 | Double_t *parameters = new Double_t[nmod*6];\r | |
85 | Double_t *errors = new Double_t[nmod*6];\r | |
86 | Double_t *pulls = new Double_t[nmod*6];\r | |
87 | \r | |
88 | for(Int_t k=0;k<nmod*6;k++) {\r | |
89 | parameters[k]=0.;\r | |
90 | errors[k]=0.;\r | |
91 | pulls[k]=0.;\r | |
92 | }\r | |
93 | \r | |
94 | Double_t trackParams[8] = {0.,0.,0.,0.,0.,0.,0.,0.};\r | |
95 | alig->InitGlobalParameters(parameters);\r | |
96 | alig->Print();\r | |
97 | \r | |
98 | ////////////////////////////////////////////////////////////////////\r | |
99 | \r | |
100 | TStopwatch stimer;\r | |
101 | stimer.Start();\r | |
102 | \r | |
103 | int iTrackOk=0; // number of good passed track\r | |
104 | // loop on spTree entries\r | |
105 | // one entry = one track\r | |
106 | for (int i=0; i<nentries; i++) {\r | |
107 | chain->GetEvent(i);\r | |
108 | //////////////////////////////////////////////////////\r | |
109 | // track preselection \r | |
110 | int npts=tpa->GetNPoints();\r | |
111 | if (npts<nreqpts) continue;\r | |
112 | if (!SelectLayers(tpa,nreqpts_lay)) continue;\r | |
113 | //////////////////////////////////////////////////////\r | |
114 | \r | |
115 | if (!alig->ProcessTrack(tpa)) {\r | |
116 | if (!(iTrackOk%500)) \r | |
117 | printf("Calling LocalFit n. %d\n",iTrackOk);\r | |
118 | alig->LocalFit(iTrackOk++,trackParams,0);\r | |
119 | }\r | |
120 | }\r | |
121 | printf("\nMillepede fed with %d tracks\n\n",iTrackOk);\r | |
122 | \r | |
123 | alig->GlobalFit(parameters,errors,pulls);\r | |
124 | \r | |
125 | cout << "Done with GlobalFit " << endl;\r | |
126 | \r | |
127 | ////////////////////////////////////////////////////////////\r | |
128 | // output\r | |
129 | \r | |
130 | \r | |
131 | TClonesArray *array = new TClonesArray("AliAlignObjParams",4000);\r | |
132 | TClonesArray &alobj = *array;\r | |
133 | \r | |
134 | // first object: ITS\r | |
135 | new(alobj[0]) AliAlignObjParams("ITS", 0, 0., 0., 0., 0., 0., 0., kTRUE);\r | |
136 | \r | |
137 | UShort_t volid;\r | |
138 | const Char_t *symname;\r | |
139 | Double_t dx,dy,dz,dpsi,dtheta,dphi;\r | |
140 | Double_t corr[21];\r | |
141 | \r | |
142 | // all ITS modules\r | |
143 | for (int idx=0; idx<2198; idx++) {\r | |
144 | volid=alig->GetModuleVolumeID(idx);\r | |
145 | symname = AliGeomManager::SymName(volid);\r | |
146 | for (int jj=0;jj<21;jj++) corr[jj]=0.0;\r | |
147 | \r | |
148 | if (alig->CheckVolumeID(volid)) { // defined modules\r | |
149 | alig->SetCurrentModule(idx);\r | |
150 | int iidx=alig->GetCurrentModuleInternalIndex();\r | |
151 | dx = parameters[iidx*6+0]; corr[0] = errors[iidx*6+0]*errors[iidx*6+0];\r | |
152 | dy = parameters[iidx*6+1]; corr[2] = errors[iidx*6+1]*errors[iidx*6+1];\r | |
153 | dz = parameters[iidx*6+2]; corr[5] = errors[iidx*6+2]*errors[iidx*6+2];\r | |
154 | dpsi = parameters[iidx*6+3]; corr[9] = errors[iidx*6+3]*errors[iidx*6+3];\r | |
155 | dtheta= parameters[iidx*6+4]; corr[14]= errors[iidx*6+4]*errors[iidx*6+4];\r | |
156 | dphi = parameters[iidx*6+5]; corr[20]= errors[iidx*6+5]*errors[iidx*6+5];\r | |
157 | }\r | |
158 | else { // other modules\r | |
159 | dx=0.0; dy=0.0; dz=0.0; dpsi=0.0; dtheta=0.0; dphi=0.0;\r | |
160 | }\r | |
161 | \r | |
162 | new(alobj[idx+1]) AliAlignObjParams(symname, volid, dx, dy, dz, dpsi, dtheta, dphi, kFALSE);\r | |
163 | AliAlignObjParams* alo = (AliAlignObjParams*) array->UncheckedAt(idx+1);\r | |
164 | alo->SetCorrMatrix(corr);\r | |
165 | }\r | |
166 | \r | |
167 | fout->WriteObject(array,"ITSAlignObjs","kSingleKey");\r | |
168 | fout->Close();\r | |
169 | \r | |
170 | stimer.Stop();\r | |
171 | stimer.Print();\r | |
172 | \r | |
173 | return 0;\r | |
174 | }\r |