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a3a3a28f | 1 | #include <TFile.h> |
37add1d1 | 2 | #include <TH1.h> |
3 | #include <TH2.h> | |
a3a3a28f | 4 | #include "AliGeomManager.h" |
a3a3a28f | 5 | #include "AliITSDetTypeRec.h" |
6 | #include "AliITSInitGeometry.h" | |
7 | #include "AliITSMeanVertexer.h" | |
d5eae813 | 8 | #include "AliITSRecPointContainer.h" |
a3a3a28f | 9 | #include "AliITSLoader.h" |
10 | #include "AliLog.h" | |
11 | #include "AliRawReader.h" | |
12 | #include "AliRawReaderDate.h" | |
13 | #include "AliRawReaderRoot.h" | |
14 | #include "AliRunLoader.h" | |
15 | #include "AliITSVertexer3D.h" | |
37add1d1 | 16 | #include "AliITSVertexer3DTapan.h" |
a3a3a28f | 17 | #include "AliESDVertex.h" |
18 | #include "AliMeanVertex.h" | |
a3a3a28f | 19 | |
199775b9 | 20 | const Int_t AliITSMeanVertexer::fgkMaxNumOfEvents = 10000; |
a3a3a28f | 21 | ClassImp(AliITSMeanVertexer) |
22 | ||
23 | /////////////////////////////////////////////////////////////////////// | |
24 | // // | |
25 | // Class to compute vertex position using SPD local reconstruction // | |
26 | // An average vertex position using all the events // | |
27 | // is built and saved // | |
28 | // Individual vertices can be optionally stored // | |
29 | // Origin: M.Masera (masera@to.infn.it) // | |
30 | // Usage: | |
31 | // AliITSMeanVertexer mv("RawDataFileName"); | |
32 | // mv.SetGeometryFileName("FileWithGeometry.root"); // def. geometry.root | |
33 | // .... optional setters .... | |
34 | // mv.Reconstruct(); // SPD local reconstruction | |
35 | // mv.DoVertices(); | |
36 | // Resulting AliMeanVertex object is stored in a file named fMVFileName | |
37 | /////////////////////////////////////////////////////////////////////// | |
38 | ||
39 | /* $Id$ */ | |
40 | ||
41 | //______________________________________________________________________ | |
d5eae813 | 42 | AliITSMeanVertexer::AliITSMeanVertexer(Bool_t mode):TObject(), |
37add1d1 | 43 | fDetTypeRec(NULL), |
44 | fVertexXY(NULL), | |
45 | fVertexZ(NULL), | |
a3a3a28f | 46 | fNoEventsContr(0), |
199775b9 | 47 | fTotContributors(0.), |
48 | fAverContributors(0.), | |
a3a3a28f | 49 | fFilterOnContributors(0), |
d5eae813 | 50 | fMode(mode), |
199775b9 | 51 | fVertexer(NULL), |
52 | fAccEvents(fgkMaxNumOfEvents), | |
53 | fVertArray("AliESDVertex",fgkMaxNumOfEvents), | |
54 | fClu0(NULL), | |
55 | fIndex(0), | |
56 | fErrXCut(0.), | |
57 | fRCut(0.), | |
58 | fLowSPD0(0), | |
59 | fHighSPD0(0) | |
a3a3a28f | 60 | { |
61 | // Default Constructor | |
199775b9 | 62 | Reset(); |
a3a3a28f | 63 | |
37add1d1 | 64 | // Histograms initialization |
8d7f6205 | 65 | const Float_t xLimit = 5.0, yLimit = 5.0, zLimit = 50.0; |
37add1d1 | 66 | const Float_t xDelta = 0.02, yDelta = 0.02, zDelta = 0.2; |
67 | fVertexXY = new TH2F("VertexXY","Vertex Diamond (Y vs X)", | |
68 | 2*(Int_t)(xLimit/xDelta),-xLimit,xLimit, | |
69 | 2*(Int_t)(yLimit/yDelta),-yLimit,yLimit); | |
63845149 | 70 | fVertexXY->SetXTitle("X , cm"); |
71 | fVertexXY->SetYTitle("Y , cm"); | |
72 | fVertexXY->SetOption("colz"); | |
37add1d1 | 73 | fVertexZ = new TH1F("VertexZ"," Longitudinal Vertex Profile", |
74 | 2*(Int_t)(zLimit/zDelta),-zLimit,zLimit); | |
63845149 | 75 | fVertexZ->SetXTitle("Z , cm"); |
199775b9 | 76 | fClu0 = new UInt_t [fgkMaxNumOfEvents]; |
77 | for(Int_t i=0;i<fgkMaxNumOfEvents;i++)fClu0[i]=0; | |
78 | fAccEvents.ResetAllBits(kTRUE); | |
a3a3a28f | 79 | } |
80 | ||
199775b9 | 81 | //______________________________________________________________________ |
82 | void AliITSMeanVertexer::Reset(){ | |
83 | // Reset averages | |
84 | for(Int_t i=0;i<3;i++){ | |
85 | fWeighPosSum[i] = 0.; | |
86 | fWeighSigSum[i] = 0.; | |
87 | fAverPosSum[i] = 0.; | |
88 | fWeighPos[i] = 0.; | |
89 | fWeighSig[i] = 0.; | |
90 | fAverPos[i] = 0.; | |
91 | for(Int_t j=0; j<3;j++)fAverPosSq[i][j] = 0.; | |
92 | for(Int_t j=0; j<3;j++)fAverPosSqSum[i][j] = 0.; | |
93 | fNoEventsContr=0; | |
94 | fTotContributors = 0.; | |
95 | if(fVertexXY)fVertexXY->Reset(); | |
96 | if(fVertexZ)fVertexZ->Reset(); | |
97 | } | |
98 | } | |
a3a3a28f | 99 | //______________________________________________________________________ |
37add1d1 | 100 | Bool_t AliITSMeanVertexer::Init() { |
101 | // Initialize filters | |
a3a3a28f | 102 | // Initialize geometry |
37add1d1 | 103 | // Initialize ITS classes |
a3a3a28f | 104 | |
37add1d1 | 105 | AliGeomManager::LoadGeometry(); |
106 | if (!AliGeomManager::ApplyAlignObjsFromCDB("ITS")) return kFALSE; | |
a3a3a28f | 107 | |
108 | AliITSInitGeometry initgeom; | |
109 | AliITSgeom *geom = initgeom.CreateAliITSgeom(); | |
37add1d1 | 110 | if (!geom) return kFALSE; |
a3a3a28f | 111 | printf("Geometry name: %s \n",(initgeom.GetGeometryName()).Data()); |
37add1d1 | 112 | |
cf0b1cea | 113 | fDetTypeRec = new AliITSDetTypeRec(); |
762133f4 | 114 | fDetTypeRec->SetLoadOnlySPDCalib(kTRUE); |
37add1d1 | 115 | fDetTypeRec->SetITSgeom(geom); |
116 | fDetTypeRec->SetDefaults(); | |
117 | fDetTypeRec->SetDefaultClusterFindersV2(kTRUE); | |
118 | ||
a3a3a28f | 119 | // Initialize filter values to their defaults |
120 | SetFilterOnContributors(); | |
199775b9 | 121 | SetCutOnErrX(); |
122 | SetCutOnR(); | |
123 | SetCutOnCls(); | |
a3a3a28f | 124 | |
d5eae813 | 125 | // Instatiate vertexer |
126 | if (!fMode) { | |
127 | fVertexer = new AliITSVertexer3DTapan(1000); | |
128 | } | |
129 | else { | |
130 | fVertexer = new AliITSVertexer3D(); | |
131 | fVertexer->SetDetTypeRec(fDetTypeRec); | |
199775b9 | 132 | AliITSVertexer3D* alias = (AliITSVertexer3D*)fVertexer; |
133 | alias->SetWideFiducialRegion(40.,0.5); | |
134 | alias->SetNarrowFiducialRegion(0.5,0.5); | |
135 | alias->SetDeltaPhiCuts(0.5,0.025); | |
136 | alias->SetDCACut(0.1); | |
137 | alias->SetPileupAlgo(3); | |
138 | fVertexer->SetComputeMultiplicity(kFALSE); | |
d5eae813 | 139 | } |
37add1d1 | 140 | return kTRUE; |
a3a3a28f | 141 | } |
142 | ||
143 | //______________________________________________________________________ | |
144 | AliITSMeanVertexer::~AliITSMeanVertexer() { | |
145 | // Destructor | |
37add1d1 | 146 | delete fDetTypeRec; |
147 | delete fVertexXY; | |
148 | delete fVertexZ; | |
d5eae813 | 149 | delete fVertexer; |
a3a3a28f | 150 | } |
151 | ||
152 | //______________________________________________________________________ | |
d5eae813 | 153 | Bool_t AliITSMeanVertexer::Reconstruct(AliRawReader *rawReader){ |
a3a3a28f | 154 | // Performs SPD local reconstruction |
37add1d1 | 155 | // and vertex finding |
156 | // returns true in case a vertex is found | |
157 | ||
158 | // Run SPD cluster finder | |
d5eae813 | 159 | AliITSRecPointContainer::Instance()->PrepareToRead(); |
37add1d1 | 160 | TTree* clustersTree = new TTree("TreeR", "Reconstructed Points Container"); //make a tree |
161 | fDetTypeRec->DigitsToRecPoints(rawReader,clustersTree,"SPD"); | |
162 | ||
163 | Bool_t vtxOK = kFALSE; | |
199775b9 | 164 | UInt_t nl1=0; |
d5eae813 | 165 | AliESDVertex *vtx = fVertexer->FindVertexForCurrentEvent(clustersTree); |
166 | if (!fMode) { | |
37add1d1 | 167 | if (TMath::Abs(vtx->GetChi2()) < 0.1) vtxOK = kTRUE; |
a3a3a28f | 168 | } |
37add1d1 | 169 | else { |
199775b9 | 170 | AliITSRecPointContainer* rpcont= AliITSRecPointContainer::Instance(); |
171 | nl1=rpcont->GetNClustersInLayerFast(1); | |
172 | if(Filter(vtx,nl1)) vtxOK = kTRUE; | |
a3a3a28f | 173 | } |
37add1d1 | 174 | delete clustersTree; |
199775b9 | 175 | if (vtxOK && fMode){ |
176 | new(fVertArray[fIndex])AliESDVertex(*vtx); | |
177 | fClu0[fIndex]=nl1; | |
178 | fIndex++; | |
179 | } | |
37add1d1 | 180 | if (vtx) delete vtx; |
a3a3a28f | 181 | |
37add1d1 | 182 | return vtxOK; |
a3a3a28f | 183 | } |
184 | ||
185 | //______________________________________________________________________ | |
37add1d1 | 186 | void AliITSMeanVertexer::WriteVertices(const char *filename){ |
187 | // Compute mean vertex and | |
188 | // store it along with the histograms | |
189 | // in a file | |
190 | ||
191 | TFile fmv(filename,"update"); | |
199775b9 | 192 | Bool_t itisOK = kFALSE; |
193 | if(ComputeMean(kFALSE)){ | |
194 | if(ComputeMean(kTRUE)){ | |
195 | Double_t cov[6]; | |
196 | cov[0] = fAverPosSq[0][0]; // variance x | |
197 | cov[1] = fAverPosSq[0][1]; // cov xy | |
198 | cov[2] = fAverPosSq[1][1]; // variance y | |
199 | cov[3] = fAverPosSq[0][2]; // cov xz | |
200 | cov[4] = fAverPosSq[1][2]; // cov yz | |
201 | cov[5] = fAverPosSq[2][2]; // variance z | |
202 | AliMeanVertex mv(fWeighPos,fWeighSig,cov,fNoEventsContr,0,0.,0.); | |
203 | mv.SetTitle("Mean Vertex"); | |
204 | mv.SetName("MeanVertex"); | |
205 | // we have to add chi2 here | |
206 | AliESDVertex vtx(fWeighPos,cov,0,TMath::Nint(fAverContributors),"MeanVertexPos"); | |
37add1d1 | 207 | |
199775b9 | 208 | mv.Write(mv.GetName(),TObject::kOverwrite); |
209 | vtx.Write(vtx.GetName(),TObject::kOverwrite); | |
210 | itisOK = kTRUE; | |
211 | } | |
a3a3a28f | 212 | } |
199775b9 | 213 | |
214 | if(!itisOK){ | |
a3a3a28f | 215 | AliError(Form("Evaluation of mean vertex not possible. Number of used events = %d",fNoEventsContr)); |
216 | } | |
37add1d1 | 217 | |
218 | fVertexXY->Write(fVertexXY->GetName(),TObject::kOverwrite); | |
219 | fVertexZ->Write(fVertexZ->GetName(),TObject::kOverwrite); | |
220 | fmv.Close(); | |
a3a3a28f | 221 | } |
222 | ||
223 | //______________________________________________________________________ | |
199775b9 | 224 | Bool_t AliITSMeanVertexer::Filter(AliESDVertex *vert,UInt_t mult){ |
a3a3a28f | 225 | // Apply selection criteria to events |
226 | Bool_t status = kFALSE; | |
199775b9 | 227 | if(!vert)return status; |
8d7f6205 | 228 | // Remove vertices reconstructed with vertexerZ |
229 | if(strcmp(vert->GetName(),"SPDVertexZ") == 0) return status; | |
a3a3a28f | 230 | Int_t ncontr = vert->GetNContributors(); |
a3a3a28f | 231 | AliDebug(1,Form("Number of contributors = %d",ncontr)); |
199775b9 | 232 | Double_t ex = vert->GetXRes(); |
233 | if(ncontr>fFilterOnContributors && (mult>fLowSPD0 && mult<fHighSPD0) && | |
234 | ((ex*1000.)<fErrXCut)) { | |
235 | status = kTRUE; | |
236 | fAccEvents.SetBitNumber(fIndex); | |
237 | } | |
a3a3a28f | 238 | return status; |
239 | } | |
240 | ||
241 | //______________________________________________________________________ | |
242 | void AliITSMeanVertexer::AddToMean(AliESDVertex *vert){ | |
243 | // update mean vertex | |
244 | Double_t currentPos[3],currentSigma[3]; | |
245 | vert->GetXYZ(currentPos); | |
246 | vert->GetSigmaXYZ(currentSigma); | |
247 | Bool_t goon = kTRUE; | |
248 | for(Int_t i=0;i<3;i++)if(currentSigma[i] == 0.)goon = kFALSE; | |
249 | if(!goon)return; | |
250 | for(Int_t i=0;i<3;i++){ | |
762133f4 | 251 | fWeighPosSum[i]+=currentPos[i]/currentSigma[i]/currentSigma[i]; |
252 | fWeighSigSum[i]+=1./currentSigma[i]/currentSigma[i]; | |
253 | fAverPosSum[i]+=currentPos[i]; | |
a3a3a28f | 254 | } |
255 | for(Int_t i=0;i<3;i++){ | |
256 | for(Int_t j=i;j<3;j++){ | |
762133f4 | 257 | fAverPosSqSum[i][j] += currentPos[i] * currentPos[j]; |
a3a3a28f | 258 | } |
259 | } | |
37add1d1 | 260 | |
199775b9 | 261 | fTotContributors+=vert->GetNContributors(); |
37add1d1 | 262 | fVertexXY->Fill(currentPos[0],currentPos[1]); |
263 | fVertexZ->Fill(currentPos[2]); | |
264 | ||
a3a3a28f | 265 | fNoEventsContr++; |
266 | } | |
267 | ||
268 | //______________________________________________________________________ | |
199775b9 | 269 | Bool_t AliITSMeanVertexer::ComputeMean(Bool_t killOutliers){ |
270 | // compute mean vertex | |
271 | // called once with killOutliers = kFALSE and then again with | |
272 | // killOutliers = kTRUE | |
273 | Double_t wpos[3]; | |
274 | for(Int_t i=0;i<3;i++)wpos[i]=fWeighPos[i]; | |
275 | Reset(); | |
276 | for(Int_t i=0;i<fVertArray.GetEntries();i++){ | |
277 | AliESDVertex* vert = NULL; | |
762133f4 | 278 | |
199775b9 | 279 | // second pass |
280 | if(killOutliers && fAccEvents.TestBitNumber(i)){ | |
281 | vert=(AliESDVertex*)fVertArray[i]; | |
282 | Double_t dist=(vert->GetXv()-wpos[0])*(vert->GetXv()-wpos[0]); | |
283 | dist+=(vert->GetYv()-wpos[1])*(vert->GetYv()-wpos[1]); | |
284 | dist=sqrt(dist)*10.; // distance in mm | |
285 | if(dist>fRCut)fAccEvents.SetBitNumber(i,kFALSE); | |
286 | } | |
287 | ||
288 | if(!fAccEvents.TestBitNumber(i))continue; | |
289 | vert=(AliESDVertex*)fVertArray[i]; | |
290 | AddToMean(vert); | |
291 | } | |
292 | if(fNoEventsContr < 2) return kFALSE; | |
293 | Double_t nevents = fNoEventsContr; | |
294 | for(Int_t i=0;i<3;i++){ | |
295 | fWeighPos[i] = fWeighPosSum[i]/fWeighSigSum[i]; | |
296 | fWeighSig[i] = 1./TMath::Sqrt(fWeighSigSum[i]); | |
297 | fAverPos[i] = fAverPosSum[i]/nevents; | |
298 | } | |
299 | for(Int_t i=0;i<3;i++){ | |
300 | for(Int_t j=i;j<3;j++){ | |
301 | fAverPosSq[i][j] = fAverPosSqSum[i][j]/(nevents -1.); | |
302 | fAverPosSq[i][j] -= nevents/(nevents -1.)*fAverPos[i]*fAverPos[j]; | |
303 | } | |
304 | } | |
305 | ||
306 | fAverContributors = fTotContributors/nevents; | |
307 | return kTRUE; | |
308 | } |