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526ddf0e | 1 | #include <iostream> |
a1a695e5 | 2 | |
526ddf0e | 3 | #include <TDatabasePDG.h> |
4 | #include <TRandom.h> | |
5 | #include <TH2F.h> | |
a1a695e5 | 6 | #include <TGeoGlobalMagField.h> |
32438f4e | 7 | #include <TSpline.h> |
cd8ed0ac | 8 | #include <TObjString.h> |
a1a695e5 | 9 | |
b0c26b55 | 10 | #include <AliLog.h> |
a1a695e5 | 11 | #include <AliTPCROC.h> |
12 | #include <AliTrackPointArray.h> | |
526ddf0e | 13 | #include <AliTrackerBase.h> |
14 | #include <AliCDBManager.h> | |
15 | #include <AliTPCParam.h> | |
16 | #include <AliGeomManager.h> | |
17 | #include <AliTPCcalibDB.h> | |
526ddf0e | 18 | #include <AliTPCclusterMI.h> |
a1a695e5 | 19 | #include <AliTPCSpaceCharge3D.h> |
32438f4e | 20 | #include <AliTPCROC.h> |
a1a695e5 | 21 | |
22 | #include "AliToyMCEvent.h" | |
23 | #include "AliToyMCTrack.h" | |
24 | ||
25 | #include "AliToyMCEventGenerator.h" | |
26 | ||
de0014b7 | 27 | ClassImp(AliToyMCEventGenerator); |
526ddf0e | 28 | |
29 | ||
de0014b7 | 30 | AliToyMCEventGenerator::AliToyMCEventGenerator() |
526ddf0e | 31 | :TObject() |
32 | ,fTPCParam(0x0) | |
a1a695e5 | 33 | ,fEvent(0x0) |
34 | ,fSpaceCharge(0x0) | |
cd8ed0ac | 35 | ,fSpaceChargeFile("$ALICE_ROOT/TPC/Calib/maps/SC_NeCO2_eps5_50kHz_precal.root") |
a1a695e5 | 36 | ,fOutputFileName("toyMC.root") |
37 | ,fOutFile(0x0) | |
38 | ,fOutTree(0x0) | |
d92b8630 | 39 | ,fUseStepCorrection(kFALSE) |
d1cf83f5 | 40 | ,fUseMaterialBudget(kFALSE) |
526ddf0e | 41 | { |
526ddf0e | 42 | fTPCParam = AliTPCcalibDB::Instance()->GetParameters(); |
43 | fTPCParam->ReadGeoMatrices(); | |
44 | } | |
45 | //________________________________________________________________ | |
de0014b7 | 46 | AliToyMCEventGenerator::AliToyMCEventGenerator(const AliToyMCEventGenerator &gen) |
526ddf0e | 47 | :TObject(gen) |
a1a695e5 | 48 | ,fTPCParam(gen.fTPCParam) |
49 | ,fEvent(0x0) | |
526ddf0e | 50 | ,fSpaceCharge(gen.fSpaceCharge) |
cd8ed0ac | 51 | ,fSpaceChargeFile(gen.fSpaceChargeFile) |
a1a695e5 | 52 | ,fOutputFileName(gen.fOutputFileName) |
53 | ,fOutFile(0x0) | |
54 | ,fOutTree(0x0) | |
d92b8630 | 55 | ,fUseStepCorrection(gen.fUseStepCorrection) |
d1cf83f5 | 56 | ,fUseMaterialBudget(gen.fUseMaterialBudget) |
526ddf0e | 57 | { |
58 | // | |
59 | } | |
60 | //________________________________________________________________ | |
de0014b7 | 61 | AliToyMCEventGenerator::~AliToyMCEventGenerator() |
526ddf0e | 62 | { |
63 | delete fSpaceCharge; | |
526ddf0e | 64 | } |
32438f4e | 65 | |
526ddf0e | 66 | //________________________________________________________________ |
a1a695e5 | 67 | Bool_t AliToyMCEventGenerator::DistortTrack(AliToyMCTrack &trackIn, Double_t t0) |
68 | { | |
69 | // | |
70 | // | |
71 | // | |
72 | ||
526ddf0e | 73 | if(!fTPCParam) { |
74 | fTPCParam = AliTPCcalibDB::Instance()->GetParameters(); | |
75 | fTPCParam->ReadGeoMatrices(); | |
526ddf0e | 76 | } |
32438f4e | 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); | |
526ddf0e | 90 | |
32438f4e | 91 | return 1; |
92 | } | |
526ddf0e | 93 | |
32438f4e | 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 | ||
a1a695e5 | 117 | //!!! when does the propagation not work, how often does it happen? |
d1cf83f5 | 118 | if (!AliTrackerBase::PropagateTrackTo(&track,iFCRadius,kMass,5,kTRUE,kMaxSnp,0,kFALSE,fUseMaterialBudget)) { |
b0c26b55 | 119 | AliError(Form("Propagation to IFC: %.2f failed\n",iFCRadius)); |
32438f4e | 120 | return; |
b0c26b55 | 121 | } |
32438f4e | 122 | |
526ddf0e | 123 | Int_t npoints=0; |
b0c26b55 | 124 | |
32438f4e | 125 | for (Double_t radius=iFCRadius; radius<oFCRadius; radius+=stepSize){ |
126 | ||
b0c26b55 | 127 | //!!! changed from return 0 to continue -> Please check |
d1cf83f5 | 128 | if (!AliTrackerBase::PropagateTrackTo(&track,radius,kMass,1,kTRUE,kMaxSnp,0,kFALSE,fUseMaterialBudget)) { |
32438f4e | 129 | AliError(Form("Propagation to %.2f failed\n",radius)); |
b0c26b55 | 130 | continue; |
131 | } | |
526ddf0e | 132 | track.GetXYZ(xyz); |
32438f4e | 133 | |
b0c26b55 | 134 | //!!! Why is this smeared |
526ddf0e | 135 | xyz[0]+=gRandom->Gaus(0,0.000005); |
136 | xyz[1]+=gRandom->Gaus(0,0.000005); | |
137 | xyz[2]+=gRandom->Gaus(0,0.000005); | |
32438f4e | 138 | |
139 | xyzf[0]=Float_t(xyz[0]); | |
140 | xyzf[1]=Float_t(xyz[1]); | |
141 | xyzf[2]=Float_t(xyz[2]); | |
142 | ||
526ddf0e | 143 | if (TMath::Abs(track.GetZ())>kMaxZ0) continue; |
32438f4e | 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(); | |
32438f4e | 154 | |
155 | // set distorted point | |
526ddf0e | 156 | Float_t distPoint[3]={xyz[0],xyz[1],xyz[2]}; |
d92b8630 | 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 | } | |
32438f4e | 166 | SetPoint(distPoint, pDist); |
167 | arrDist.AddPoint(npoints, &pDist); | |
32438f4e | 168 | |
169 | ++npoints; | |
526ddf0e | 170 | } |
32438f4e | 171 | |
172 | arrUdist.SetUniqueID(npoints); | |
173 | arrDist.SetUniqueID(npoints); | |
174 | } | |
526ddf0e | 175 | |
32438f4e | 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); | |
d92b8630 | 204 | // abuse volume ID for the sector number |
32438f4e | 205 | point.SetVolumeID(fTPCParam->Transform0to1(xyz,i)); |
b0c26b55 | 206 | |
32438f4e | 207 | // TODO: Add sampled dE/dx (use SetCharge) |
208 | } | |
b0c26b55 | 209 | |
32438f4e | 210 | //________________________________________________________________ |
211 | void AliToyMCEventGenerator::ConvertTrackPointsToLocalClusters(AliTrackPointArray &arrPoints, | |
212 | AliToyMCTrack &tr, Double_t t0, Int_t type) | |
213 | { | |
214 | // | |
215 | // | |
216 | // | |
526ddf0e | 217 | |
526ddf0e | 218 | |
32438f4e | 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 | } | |
b0c26b55 | 259 | |
32438f4e | 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 | } | |
b0c26b55 | 265 | |
32438f4e | 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; | |
b0c26b55 | 288 | |
544076ea | 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 | ||
32438f4e | 302 | } |
303 | secOld=sec; | |
b0c26b55 | 304 | |
32438f4e | 305 | // check we are in an active area |
306 | if (splXY->FindX(localX)<1 || splXZ->FindX(localX)<1) continue; | |
b0c26b55 | 307 | |
32438f4e | 308 | //get interpolated value at the center for the pad row |
309 | // using splines | |
310 | const Double_t localY=splXY->Eval(localX/*,0x0,"S"*/); | |
311 | const Double_t localZ=splXZ->Eval(localX/*,0x0,"S"*/); | |
312 | Float_t xyz[3]={localX,localY,localZ}; | |
526ddf0e | 313 | |
32438f4e | 314 | if (!SetupCluster(tempCl,xyz,sec,t0)) continue; |
d1cf83f5 | 315 | tempCl.SetLabel(tr.GetUniqueID(), 0); |
32438f4e | 316 | |
317 | if (type==0) tr.AddSpacePoint(tempCl); | |
318 | else tr.AddDistortedSpacePoint(tempCl); | |
319 | // printf("SetupCluster %3d: (%.2f, %.2f, %.2f), %d, %.2f\n",irow,xyz[0],xyz[1],xyz[2],sec,t0); | |
320 | } | |
526ddf0e | 321 | |
32438f4e | 322 | delete splXY; |
323 | splXY=0x0; | |
324 | delete splXZ; | |
325 | splXZ=0x0; | |
326 | ||
327 | } | |
526ddf0e | 328 | |
32438f4e | 329 | //________________________________________________________________ |
330 | Bool_t AliToyMCEventGenerator::SetupCluster(AliTPCclusterMI &tempCl, Float_t xyz[3], Int_t sec, Double_t t0) | |
331 | { | |
332 | // | |
333 | // | |
334 | // | |
526ddf0e | 335 | |
32438f4e | 336 | const Double_t kSigmaY = 0.1; |
337 | const Double_t kSigmaZ = 0.1; | |
338 | const Double_t kMaxZ0 = fTPCParam->GetZLength(); | |
339 | //TODO: Get this from the OCDB at some point? | |
340 | const Double_t kDriftVel = fTPCParam->GetDriftV(); | |
526ddf0e | 341 | |
32438f4e | 342 | tempCl.SetX(xyz[0]); |
343 | tempCl.SetY(xyz[1]); | |
344 | tempCl.SetZ(xyz[2]); | |
526ddf0e | 345 | |
32438f4e | 346 | tempCl.SetSigmaY2(kSigmaY*kSigmaY); |
347 | tempCl.SetSigmaZ2(kSigmaZ*kSigmaZ); | |
348 | ||
349 | // transform from the local coordinates to the coordinates expressed in pad coordinates | |
350 | Int_t index[3] = {0,sec,0}; | |
351 | fTPCParam->Transform2to3(xyz,index); | |
352 | fTPCParam->Transform3to4(xyz,index); | |
353 | fTPCParam->Transform4to8(xyz,index); | |
354 | ||
355 | const Int_t row = index[2]; | |
356 | const Int_t nPads = fTPCParam->GetNPads(sec, row); | |
357 | // pad is fractional, but it needs to be shifted from the center | |
358 | // to the edge of the row | |
359 | const Float_t pad = xyz[1] + nPads/2; | |
360 | ||
361 | tempCl.SetRow(row); | |
362 | tempCl.SetPad(pad); | |
363 | Float_t timeBin=Float_t(t0 + (kMaxZ0-TMath::Abs(tempCl.GetZ()))/kDriftVel); | |
364 | tempCl.SetTimeBin(timeBin); // set time as t0 + drift time from dist z | |
365 | tempCl.SetDetector(sec); | |
366 | ||
367 | //check if we are in the active area | |
368 | if (pad<0 || pad>=nPads) return kFALSE; | |
369 | ||
370 | return kTRUE; | |
526ddf0e | 371 | } |
32438f4e | 372 | |
a1a695e5 | 373 | //________________________________________________________________ |
374 | Bool_t AliToyMCEventGenerator::ConnectOutputFile() | |
375 | { | |
376 | // | |
377 | // Create the output file name and tree and connect the event | |
378 | // | |
379 | ||
380 | fOutFile = new TFile(fOutputFileName.Data(),"recreate"); | |
381 | ||
382 | if (!fOutFile || !fOutFile->IsOpen()){ | |
383 | delete fOutFile; | |
384 | fOutFile=0x0; | |
385 | return kFALSE; | |
386 | } | |
387 | ||
388 | fOutTree = new TTree("toyMCtree","Tree with toyMC simulation"); | |
389 | fOutTree->Branch("event","AliToyMCEvent",&fEvent); | |
390 | ||
391 | return kTRUE; | |
392 | } | |
393 | ||
394 | //________________________________________________________________ | |
395 | Bool_t AliToyMCEventGenerator::CloseOutputFile() | |
396 | { | |
397 | // | |
398 | // close the output file | |
399 | // | |
400 | if (!fOutFile) return kFALSE; | |
401 | fOutFile->Write(); | |
402 | fOutFile->Close(); | |
403 | delete fOutFile; | |
404 | fOutFile=0x0; | |
405 | ||
406 | return kTRUE; | |
407 | } | |
408 | ||
409 | //________________________________________________________________ | |
410 | void AliToyMCEventGenerator::FillTree() | |
411 | { | |
412 | // fill the tree | |
413 | if (fOutTree) fOutTree->Fill(); | |
414 | } | |
415 | ||
cd8ed0ac | 416 | //________________________________________________________________ |
417 | void AliToyMCEventGenerator::SetSpaceCharge(EEpsilon epsilon, EGasType gasType/*=kNeCO2_9010*/, ECollRate collRate/*=k50kHz*/) | |
418 | { | |
419 | // | |
420 | // Set the space charge conditions | |
421 | // | |
422 | fSpaceChargeFile="$ALICE_ROOT/TPC/Calib/maps/SC"; | |
423 | switch (gasType) { | |
424 | case kNeCO2_9010: | |
425 | fSpaceChargeFile.Append("_NeCO2"); | |
426 | break; | |
427 | } | |
428 | switch (epsilon) { | |
429 | case kEps5: | |
430 | fSpaceChargeFile.Append("_eps5"); | |
431 | break; | |
432 | case kEps10: | |
433 | fSpaceChargeFile.Append("_eps10"); | |
434 | break; | |
435 | case kEps20: | |
436 | fSpaceChargeFile.Append("_eps20"); | |
437 | break; | |
438 | } | |
439 | switch (collRate) { | |
440 | case k50kHz: | |
441 | fSpaceChargeFile.Append("_50kHz"); | |
442 | break; | |
443 | } | |
444 | fSpaceChargeFile.Append("_precal.root"); | |
445 | } | |
446 | ||
447 | //________________________________________________________________ | |
448 | void AliToyMCEventGenerator::InitSpaceCharge() | |
449 | { | |
450 | // | |
451 | // init the space charge conditions | |
452 | // this should be called after the tree was connected | |
453 | // | |
454 | ||
455 | AliInfo(Form("Using space charge map file: '%s'",fSpaceChargeFile.Data())); | |
456 | ||
457 | TFile f(fSpaceChargeFile.Data()); | |
458 | fSpaceCharge=(AliTPCSpaceCharge3D*)f.Get("map"); | |
459 | ||
460 | if (fOutTree){ | |
461 | AliInfo("Attaching space charge map file name to the tree"); | |
462 | fOutTree->GetUserInfo()->Add(new TObjString(fSpaceChargeFile.Data())); | |
463 | } | |
464 | } |