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1 | #include <iostream> | |
2 | ||
3 | #include <TDatabasePDG.h> | |
4 | #include <TRandom.h> | |
5 | #include <TH2F.h> | |
6 | #include <TGeoGlobalMagField.h> | |
7 | #include <TSpline.h> | |
8 | #include <TObjString.h> | |
9 | ||
10 | #include <AliLog.h> | |
11 | #include <AliTPCROC.h> | |
12 | #include <AliTrackPointArray.h> | |
13 | #include <AliTrackerBase.h> | |
14 | #include <AliCDBManager.h> | |
15 | #include <AliTPCParam.h> | |
16 | #include <AliGeomManager.h> | |
17 | #include <AliTPCcalibDB.h> | |
18 | #include <AliTPCclusterMI.h> | |
19 | #include <AliTPCSpaceCharge3D.h> | |
20 | #include <AliTPCROC.h> | |
21 | ||
22 | #include "AliToyMCEvent.h" | |
23 | #include "AliToyMCTrack.h" | |
24 | ||
25 | #include "AliToyMCEventGenerator.h" | |
26 | ||
27 | ClassImp(AliToyMCEventGenerator); | |
28 | ||
29 | ||
30 | AliToyMCEventGenerator::AliToyMCEventGenerator() | |
31 | :TObject() | |
32 | ,fTPCParam(0x0) | |
33 | ,fEvent(0x0) | |
34 | ,fSpaceCharge(0x0) | |
35 | ,fSpaceChargeFile("$ALICE_ROOT/TPC/Calib/maps/SC_NeCO2_eps5_50kHz_precal.root") | |
36 | ,fOutputFileName("toyMC.root") | |
37 | ,fOutFile(0x0) | |
38 | ,fOutTree(0x0) | |
39 | ,fUseStepCorrection(kFALSE) | |
40 | ,fUseMaterialBudget(kFALSE) | |
41 | { | |
42 | fTPCParam = AliTPCcalibDB::Instance()->GetParameters(); | |
43 | fTPCParam->ReadGeoMatrices(); | |
44 | } | |
45 | //________________________________________________________________ | |
46 | AliToyMCEventGenerator::AliToyMCEventGenerator(const AliToyMCEventGenerator &gen) | |
47 | :TObject(gen) | |
48 | ,fTPCParam(gen.fTPCParam) | |
49 | ,fEvent(0x0) | |
50 | ,fSpaceCharge(gen.fSpaceCharge) | |
51 | ,fSpaceChargeFile(gen.fSpaceChargeFile) | |
52 | ,fOutputFileName(gen.fOutputFileName) | |
53 | ,fOutFile(0x0) | |
54 | ,fOutTree(0x0) | |
55 | ,fUseStepCorrection(gen.fUseStepCorrection) | |
56 | ,fUseMaterialBudget(gen.fUseMaterialBudget) | |
57 | { | |
58 | // | |
59 | } | |
60 | //________________________________________________________________ | |
61 | AliToyMCEventGenerator::~AliToyMCEventGenerator() | |
62 | { | |
63 | delete fSpaceCharge; | |
64 | } | |
65 | ||
66 | //________________________________________________________________ | |
67 | Bool_t AliToyMCEventGenerator::DistortTrack(AliToyMCTrack &trackIn, Double_t t0) | |
68 | { | |
69 | // | |
70 | // | |
71 | // | |
72 | ||
73 | if(!fTPCParam) { | |
74 | fTPCParam = AliTPCcalibDB::Instance()->GetParameters(); | |
75 | fTPCParam->ReadGeoMatrices(); | |
76 | } | |
77 | ||
78 | // make it big enough to hold all points | |
79 | // store real number of generated points in the unique id | |
80 | const Int_t nMaxPoints=3000; | |
81 | AliTrackPointArray pointArray0(nMaxPoints); //undistorted | |
82 | AliTrackPointArray pointArray1(nMaxPoints); //distorted | |
83 | ||
84 | //Create space point of undistorted and distorted clusters along the propagated track trajectory | |
85 | CreateSpacePoints(trackIn,pointArray0,pointArray1); | |
86 | //Convert the space points into clusters in the local frame | |
87 | //for undistorted and distorted clusters using the same function | |
88 | ConvertTrackPointsToLocalClusters(pointArray0,trackIn,t0,0); | |
89 | ConvertTrackPointsToLocalClusters(pointArray1,trackIn,t0,1); | |
90 | ||
91 | return 1; | |
92 | } | |
93 | ||
94 | //________________________________________________________________ | |
95 | void AliToyMCEventGenerator::CreateSpacePoints(AliToyMCTrack &trackIn, | |
96 | AliTrackPointArray &arrUdist, | |
97 | AliTrackPointArray &arrDist) | |
98 | { | |
99 | // | |
100 | // sample the track from the inner to the outer wall of the TPC | |
101 | // a graph is filled in local coordinates for later | |
102 | // | |
103 | ||
104 | const Double_t kMaxSnp = 0.85; | |
105 | const Double_t kMaxZ0 = fTPCParam->GetZLength(); | |
106 | const Double_t kMass = TDatabasePDG::Instance()->GetParticle("pi+")->Mass(); | |
107 | ||
108 | const Double_t iFCRadius = 83.5; //radius constants found in AliTPCCorrection.cxx | |
109 | const Double_t oFCRadius = 254.5; | |
110 | ||
111 | AliToyMCTrack track(trackIn); | |
112 | //!!! TODO: make this adjustable perhaps | |
113 | const Double_t stepSize=0.1; | |
114 | Double_t xyz[3] = {0.,0.,0.}; | |
115 | Float_t xyzf[3] = {0.,0.,0.}; | |
116 | ||
117 | //!!! when does the propagation not work, how often does it happen? | |
118 | if (!AliTrackerBase::PropagateTrackTo(&track,iFCRadius,kMass,5,kTRUE,kMaxSnp,0,kFALSE,fUseMaterialBudget)) { | |
119 | AliError(Form("Propagation to IFC: %.2f failed\n",iFCRadius)); | |
120 | return; | |
121 | } | |
122 | ||
123 | Int_t npoints=0; | |
124 | ||
125 | for (Double_t radius=iFCRadius; radius<oFCRadius; radius+=stepSize){ | |
126 | ||
127 | //!!! changed from return 0 to continue -> Please check | |
128 | if (!AliTrackerBase::PropagateTrackTo(&track,radius,kMass,1,kTRUE,kMaxSnp,0,kFALSE,fUseMaterialBudget)) { | |
129 | AliError(Form("Propagation to %.2f failed\n",radius)); | |
130 | continue; | |
131 | } | |
132 | track.GetXYZ(xyz); | |
133 | ||
134 | //!!! Why is this smeared | |
135 | // xyz[0]+=gRandom->Gaus(0,0.000005); | |
136 | // xyz[1]+=gRandom->Gaus(0,0.000005); | |
137 | // xyz[2]+=gRandom->Gaus(0,0.000005); | |
138 | ||
139 | xyzf[0]=Float_t(xyz[0]); | |
140 | xyzf[1]=Float_t(xyz[1]); | |
141 | xyzf[2]=Float_t(xyz[2]); | |
142 | ||
143 | if (TMath::Abs(track.GetZ())>kMaxZ0) continue; | |
144 | // if (TMath::Abs(track.GetX())<iFCRadius) continue; | |
145 | // if (TMath::Abs(track.GetX())>oFCRadius) continue; | |
146 | ||
147 | ||
148 | AliTrackPoint pUdist; // undistorted space point | |
149 | AliTrackPoint pDist; // distorted space point | |
150 | // Set undistorted point | |
151 | SetPoint(xyzf,pUdist); | |
152 | arrUdist.AddPoint(npoints, &pUdist); | |
153 | Int_t sector=pUdist.GetVolumeID(); | |
154 | ||
155 | // set distorted point | |
156 | Float_t distPoint[3]={xyz[0],xyz[1],xyz[2]}; | |
157 | Float_t dxyz[3]={0.,0.,0.}; | |
158 | if (!fUseStepCorrection){ | |
159 | fSpaceCharge->DistortPoint(distPoint, sector); | |
160 | } else { | |
161 | fSpaceCharge->GetCorrectionIntegralDz(distPoint,sector,dxyz,5); | |
162 | distPoint[0]-=dxyz[0]; | |
163 | distPoint[1]-=dxyz[1]; | |
164 | distPoint[2]-=dxyz[2]; | |
165 | } | |
166 | SetPoint(distPoint, pDist); | |
167 | arrDist.AddPoint(npoints, &pDist); | |
168 | ||
169 | ++npoints; | |
170 | } | |
171 | ||
172 | arrUdist.SetUniqueID(npoints); | |
173 | arrDist.SetUniqueID(npoints); | |
174 | } | |
175 | ||
176 | //________________________________________________________________ | |
177 | void AliToyMCEventGenerator::SetPoint(Float_t xyz[3], AliTrackPoint &point) | |
178 | { | |
179 | // | |
180 | // make AliTrackPoint out of AliTPCclusterMI | |
181 | // | |
182 | ||
183 | //covariance at the local frame | |
184 | //assume 1mm distortion in y and z | |
185 | Int_t i[3]={0,0,0}; | |
186 | const Double_t kSigmaY=0.1; | |
187 | const Double_t kSigmaZ=0.1; | |
188 | Float_t cov[6]={0,0,0, kSigmaY*kSigmaY,0,kSigmaZ*kSigmaZ}; | |
189 | ||
190 | const Float_t alpha = -TMath::ATan2(xyz[1],xyz[0]); | |
191 | const Float_t sin = TMath::Sin(alpha), cos = TMath::Cos(alpha); | |
192 | ||
193 | Float_t newcov[6]; | |
194 | newcov[0] = cov[0]*cos*cos + 2*cov[1]*sin*cos + cov[3]*sin*sin; | |
195 | newcov[1] = cov[1]*(cos*cos-sin*sin) + (cov[3]-cov[0])*sin*cos; | |
196 | newcov[2] = cov[2]*cos + cov[4]*sin; | |
197 | newcov[3] = cov[0]*sin*sin - 2*cov[1]*sin*cos + cov[3]*cos*cos; | |
198 | newcov[4] = cov[4]*cos - cov[2]*sin; | |
199 | newcov[5] = cov[5]; | |
200 | ||
201 | // voluem ID to add later .... | |
202 | point.SetXYZ(xyz); | |
203 | point.SetCov(newcov); | |
204 | // abuse volume ID for the sector number | |
205 | point.SetVolumeID(fTPCParam->Transform0to1(xyz,i)); | |
206 | ||
207 | // TODO: Add sampled dE/dx (use SetCharge) | |
208 | } | |
209 | ||
210 | //________________________________________________________________ | |
211 | void AliToyMCEventGenerator::ConvertTrackPointsToLocalClusters(AliTrackPointArray &arrPoints, | |
212 | AliToyMCTrack &tr, Double_t t0, Int_t type) | |
213 | { | |
214 | // | |
215 | // | |
216 | // | |
217 | ||
218 | ||
219 | const Int_t npoints=Int_t(arrPoints.GetUniqueID()); | |
220 | Int_t secOld=-1; | |
221 | ||
222 | // create an array for graphs which are used for local interpolation | |
223 | // we need a new graph if the sector changed since then the local frame will also change | |
224 | TObjArray arrGraphsXY(72); | |
225 | arrGraphsXY.SetOwner(); | |
226 | TObjArray arrGraphsXZ(72); | |
227 | arrGraphsXZ.SetOwner(); | |
228 | AliTrackPoint p; | |
229 | //create initial graph | |
230 | TGraph *grXY=0x0; | |
231 | TGraph *grXZ=0x0; | |
232 | //row -> sector mapping | |
233 | Int_t rowMap[159]; | |
234 | for (Int_t irow=0; irow<159; ++irow) rowMap[irow]=-1; | |
235 | ||
236 | // 1. Step | |
237 | // Make from the list of global space points graphs in the local frame | |
238 | // one graph per sector is needed | |
239 | for (Int_t ipoint=0; ipoint<npoints; ++ipoint){ | |
240 | arrPoints.GetPoint(p,ipoint); | |
241 | Float_t xyz[3] = {p.GetX(),p.GetY(),p.GetZ()}; | |
242 | Int_t index[3] = {0,0,0}; | |
243 | Int_t row = fTPCParam->GetPadRow(xyz,index); | |
244 | // rotate space point to local frame | |
245 | // the angle is given by the VolumeID which was set in CrateSpacePoints | |
246 | const Int_t sec=p.GetVolumeID(); | |
247 | if (row<0 || (sec<36 && row>62) || row>95 ) continue; | |
248 | Double_t angle=((sec%18)*20.+10.)/TMath::RadToDeg(); | |
249 | AliTrackPoint pRot=p.Rotate(angle); | |
250 | const Int_t secrow=row+(sec>35)*63; | |
251 | if (rowMap[secrow]==-1) rowMap[secrow]=sec; | |
252 | // check if we need a new graph (sector change) | |
253 | if (secOld!=sec){ | |
254 | grXY=new TGraph; | |
255 | grXZ=new TGraph; | |
256 | arrGraphsXY.AddAt(grXY,sec); | |
257 | arrGraphsXZ.AddAt(grXZ,sec); | |
258 | } | |
259 | ||
260 | //add coordinates in local frame for later interpolation | |
261 | grXY->SetPoint(grXY->GetN(), pRot.GetX(), pRot.GetY()); | |
262 | grXZ->SetPoint(grXZ->GetN(), pRot.GetX(), pRot.GetZ()); | |
263 | secOld=sec; | |
264 | } | |
265 | ||
266 | // 2. Step | |
267 | // create in the center of each row a space point by using the graph to interpolate | |
268 | // the the center of the row. This is done in xy and xz | |
269 | TSpline3 *splXY=0x0; | |
270 | TSpline3 *splXZ=0x0; | |
271 | AliTPCclusterMI tempCl; | |
272 | secOld=-1; | |
273 | for (Int_t irow=0; irow<159; ++irow ){ | |
274 | const Int_t sec = rowMap[irow]; | |
275 | if (sec==-1) continue; | |
276 | const Int_t secrow = irow<63?irow:irow-63; | |
277 | Double_t localX = fTPCParam->GetPadRowRadii(sec,secrow); | |
278 | // get graph for the current row | |
279 | if (sec!=secOld){ | |
280 | delete splXY; | |
281 | splXY=0x0; | |
282 | delete splXZ; | |
283 | splXZ=0x0; | |
284 | ||
285 | grXY=(TGraph*)arrGraphsXY.At(sec); | |
286 | grXZ=(TGraph*)arrGraphsXZ.At(sec); | |
287 | if (!grXY) continue; | |
288 | ||
289 | // if(grXY->GetN()>1 && grXZ->GetN()>1) { //causes segmentation violation if N==1 | |
290 | // splXY=new TSpline3("splXY",grXY); | |
291 | // splXZ=new TSpline3("splXZ",grXZ); | |
292 | // } | |
293 | // else { | |
294 | //TODO: make a cluster also in the sector w only one space point? | |
295 | // continue; | |
296 | // Double_t tempX=0., tempY = 0., tempZ = 0.; | |
297 | ||
298 | // grXY->GetPoint(0,tempX,localY); | |
299 | // grXZ->GetPoint(0,tempX,localZ); | |
300 | // } | |
301 | ||
302 | } | |
303 | secOld=sec; | |
304 | ||
305 | // check we are in an active area | |
306 | // if (splXY->FindX(localX)<1 || splXZ->FindX(localX)<1) continue; | |
307 | if ( localX<grXY->GetX()[0] || localX>grXY->GetX()[grXY->GetN()-1] || localX<grXZ->GetX()[0] || localX>grXZ->GetX()[grXZ->GetN()-1]) continue; | |
308 | ||
309 | //get interpolated value at the center for the pad row | |
310 | // using splines | |
311 | // const Double_t localY=splXY->Eval(localX/*,0x0,"S"*/); | |
312 | // const Double_t localZ=splXZ->Eval(localX/*,0x0,"S"*/); | |
313 | const Double_t localY=grXY->Eval(localX/*,0x0,"S"*/); | |
314 | const Double_t localZ=grXZ->Eval(localX/*,0x0,"S"*/); | |
315 | Float_t xyz[3]={localX,localY,localZ}; | |
316 | ||
317 | if (!SetupCluster(tempCl,xyz,sec,t0)) continue; | |
318 | tempCl.SetLabel(tr.GetUniqueID(), 0); | |
319 | ||
320 | if (type==0) tr.AddSpacePoint(tempCl); | |
321 | else tr.AddDistortedSpacePoint(tempCl); | |
322 | // printf("SetupCluster %3d: (%.2f, %.2f, %.2f), %d, %.2f\n",irow,xyz[0],xyz[1],xyz[2],sec,t0); | |
323 | } | |
324 | ||
325 | delete splXY; | |
326 | splXY=0x0; | |
327 | delete splXZ; | |
328 | splXZ=0x0; | |
329 | ||
330 | } | |
331 | ||
332 | //________________________________________________________________ | |
333 | Bool_t AliToyMCEventGenerator::SetupCluster(AliTPCclusterMI &tempCl, Float_t xyz[3], Int_t sec, Double_t t0) | |
334 | { | |
335 | // | |
336 | // | |
337 | // | |
338 | ||
339 | const Double_t kSigmaY = 0.1; | |
340 | const Double_t kSigmaZ = 0.1; | |
341 | const Double_t kMaxZ0 = fTPCParam->GetZLength(); | |
342 | //TODO: Get this from the OCDB at some point? | |
343 | const Double_t kDriftVel = fTPCParam->GetDriftV(); | |
344 | ||
345 | tempCl.SetX(xyz[0]); | |
346 | tempCl.SetY(xyz[1]); | |
347 | tempCl.SetZ(xyz[2]); | |
348 | ||
349 | tempCl.SetSigmaY2(kSigmaY*kSigmaY); | |
350 | tempCl.SetSigmaZ2(kSigmaZ*kSigmaZ); | |
351 | ||
352 | // transform from the local coordinates to the coordinates expressed in pad coordinates | |
353 | Int_t index[3] = {0,sec,0}; | |
354 | fTPCParam->Transform2to3(xyz,index); | |
355 | fTPCParam->Transform3to4(xyz,index); | |
356 | fTPCParam->Transform4to8(xyz,index); | |
357 | ||
358 | const Int_t row = index[2]; | |
359 | const Int_t nPads = fTPCParam->GetNPads(sec, row); | |
360 | // pad is fractional, but it needs to be shifted from the center | |
361 | // to the edge of the row | |
362 | const Float_t pad = xyz[1] + nPads/2; | |
363 | ||
364 | tempCl.SetRow(row); | |
365 | tempCl.SetPad(pad); | |
366 | Float_t timeBin=Float_t(t0 + (kMaxZ0-TMath::Abs(tempCl.GetZ()))/kDriftVel); | |
367 | tempCl.SetTimeBin(timeBin); // set time as t0 + drift time from dist z | |
368 | tempCl.SetDetector(sec); | |
369 | ||
370 | //check if we are in the active area | |
371 | if (pad<0 || pad>=nPads) return kFALSE; | |
372 | ||
373 | return kTRUE; | |
374 | } | |
375 | ||
376 | //________________________________________________________________ | |
377 | Bool_t AliToyMCEventGenerator::ConnectOutputFile() | |
378 | { | |
379 | // | |
380 | // Create the output file name and tree and connect the event | |
381 | // | |
382 | ||
383 | fOutFile = new TFile(fOutputFileName.Data(),"recreate"); | |
384 | ||
385 | if (!fOutFile || !fOutFile->IsOpen()){ | |
386 | delete fOutFile; | |
387 | fOutFile=0x0; | |
388 | return kFALSE; | |
389 | } | |
390 | ||
391 | fOutTree = new TTree("toyMCtree","Tree with toyMC simulation"); | |
392 | fOutTree->Branch("event","AliToyMCEvent",&fEvent); | |
393 | ||
394 | return kTRUE; | |
395 | } | |
396 | ||
397 | //________________________________________________________________ | |
398 | Bool_t AliToyMCEventGenerator::CloseOutputFile() | |
399 | { | |
400 | // | |
401 | // close the output file | |
402 | // | |
403 | if (!fOutFile) return kFALSE; | |
404 | fOutFile->Write(); | |
405 | fOutFile->Close(); | |
406 | delete fOutFile; | |
407 | fOutFile=0x0; | |
408 | ||
409 | return kTRUE; | |
410 | } | |
411 | ||
412 | //________________________________________________________________ | |
413 | void AliToyMCEventGenerator::FillTree() | |
414 | { | |
415 | // fill the tree | |
416 | if (fOutTree) fOutTree->Fill(); | |
417 | } | |
418 | ||
419 | //________________________________________________________________ | |
420 | void AliToyMCEventGenerator::SetSpaceCharge(EEpsilon epsilon, EGasType gasType/*=kNeCO2_9010*/, ECollRate collRate/*=k50kHz*/) | |
421 | { | |
422 | // | |
423 | // Set the space charge conditions | |
424 | // | |
425 | fSpaceChargeFile="$ALICE_ROOT/TPC/Calib/maps/SC"; | |
426 | switch (gasType) { | |
427 | case kNeCO2_9010: | |
428 | fSpaceChargeFile.Append("_NeCO2"); | |
429 | break; | |
430 | } | |
431 | switch (epsilon) { | |
432 | case kEps5: | |
433 | fSpaceChargeFile.Append("_eps5"); | |
434 | break; | |
435 | case kEps10: | |
436 | fSpaceChargeFile.Append("_eps10"); | |
437 | break; | |
438 | case kEps20: | |
439 | fSpaceChargeFile.Append("_eps20"); | |
440 | break; | |
441 | } | |
442 | switch (collRate) { | |
443 | case k50kHz: | |
444 | fSpaceChargeFile.Append("_50kHz"); | |
445 | break; | |
446 | } | |
447 | fSpaceChargeFile.Append("_precal.root"); | |
448 | } | |
449 | ||
450 | //________________________________________________________________ | |
451 | void AliToyMCEventGenerator::InitSpaceCharge() | |
452 | { | |
453 | // | |
454 | // init the space charge conditions | |
455 | // this should be called after the tree was connected | |
456 | // | |
457 | ||
458 | AliInfo(Form("Using space charge map file: '%s'",fSpaceChargeFile.Data())); | |
459 | ||
460 | TFile f(fSpaceChargeFile.Data()); | |
461 | fSpaceCharge=(AliTPCSpaceCharge3D*)f.Get("map"); | |
462 | ||
463 | if (fOutTree){ | |
464 | AliInfo("Attaching space charge map file name to the tree"); | |
465 | fOutTree->GetUserInfo()->Add(new TObjString(fSpaceChargeFile.Data())); | |
466 | } | |
467 | } |