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1b446896 | 1 | #include "AliHBTReaderTPC.h" |
3f745d47 | 2 | //______________________________________________ |
3 | // | |
4 | // class AliHBTReaderTPC | |
5 | // | |
6 | // reader for TPC tracking | |
7 | // needs galice.root, AliTPCtracks.root, AliTPCclusters.root | |
8 | // | |
9 | // more info: http://aliweb.cern.ch/people/skowron/analyzer/index.html | |
10 | // Piotr.Skowronski@cern.ch | |
11 | // | |
12 | /////////////////////////////////////////////////////////////////////////// | |
1b446896 | 13 | #include <TTree.h> |
14 | #include <TFile.h> | |
16701d1b | 15 | #include <TParticle.h> |
1b446896 | 16 | |
bed069a4 | 17 | #include <Varargs.h> |
18 | ||
16701d1b | 19 | #include <AliRun.h> |
88cb7938 | 20 | #include <AliLoader.h> |
21 | #include <AliStack.h> | |
16701d1b | 22 | #include <AliMagF.h> |
1b446896 | 23 | #include <AliTPCtrack.h> |
24 | #include <AliTPCParam.h> | |
88cb7938 | 25 | #include <AliTPCtracker.h> |
bed069a4 | 26 | #include <AliTPCLoader.h> |
1b446896 | 27 | |
1b446896 | 28 | #include "AliHBTRun.h" |
29 | #include "AliHBTEvent.h" | |
30 | #include "AliHBTParticle.h" | |
31 | #include "AliHBTParticleCut.h" | |
32 | ||
1b446896 | 33 | ClassImp(AliHBTReaderTPC) |
3f745d47 | 34 | |
bed069a4 | 35 | AliHBTReaderTPC::AliHBTReaderTPC(): |
36 | fFileName("galice.root"), | |
37 | fRunLoader(0x0), | |
38 | fTPCLoader(0x0), | |
39 | fMagneticField(0.0), | |
3f745d47 | 40 | fUseMagFFromRun(kTRUE), |
41 | fNClustMin(0), | |
42 | fNClustMax(190), | |
43 | fNChi2PerClustMin(0.0), | |
44 | fNChi2PerClustMax(10e5), | |
45 | fC44Min(0.0), | |
46 | fC44Max(10e5) | |
88cb7938 | 47 | { |
48 | //constructor, | |
49 | //Defaults: | |
50 | // galicefilename = "" - this means: Do not open gAlice file - | |
51 | // just leave the global pointer untouched | |
52 | ||
88cb7938 | 53 | } |
98295f4b | 54 | |
bed069a4 | 55 | AliHBTReaderTPC::AliHBTReaderTPC(const Char_t* galicefilename): |
56 | fFileName(galicefilename), | |
57 | fRunLoader(0x0), | |
58 | fTPCLoader(0x0), | |
59 | fMagneticField(0.0), | |
3f745d47 | 60 | fUseMagFFromRun(kTRUE), |
61 | fNClustMin(0), | |
62 | fNClustMax(190), | |
63 | fNChi2PerClustMin(0.0), | |
64 | fNChi2PerClustMax(10e5), | |
65 | fC44Min(0.0), | |
66 | fC44Max(10e5) | |
1b446896 | 67 | { |
16701d1b | 68 | //constructor, |
1b446896 | 69 | //Defaults: |
1b446896 | 70 | // galicefilename = "" - this means: Do not open gAlice file - |
88cb7938 | 71 | // just leave the global pointer untouched |
1b446896 | 72 | |
16701d1b | 73 | } |
74 | /********************************************************************/ | |
88cb7938 | 75 | AliHBTReaderTPC::AliHBTReaderTPC(TObjArray* dirs, const Char_t* galicefilename): |
bed069a4 | 76 | AliHBTReader(dirs), |
77 | fFileName(galicefilename), | |
78 | fRunLoader(0x0), | |
79 | fTPCLoader(0x0), | |
80 | fMagneticField(0.0), | |
3f745d47 | 81 | fUseMagFFromRun(kTRUE), |
82 | fNClustMin(0), | |
83 | fNClustMax(190), | |
84 | fNChi2PerClustMin(0.0), | |
85 | fNChi2PerClustMax(10e5), | |
86 | fC44Min(0.0), | |
87 | fC44Max(10e5) | |
16701d1b | 88 | { |
89 | //constructor, | |
90 | //Defaults: | |
16701d1b | 91 | // galicefilename = "" - this means: Do not open gAlice file - |
92 | // just leave the global pointer untached | |
88cb7938 | 93 | |
1b446896 | 94 | } |
95 | /********************************************************************/ | |
96 | ||
97 | AliHBTReaderTPC::~AliHBTReaderTPC() | |
bed069a4 | 98 | { |
1b446896 | 99 | //desctructor |
3f745d47 | 100 | if (AliHBTParticle::GetDebug()) |
101 | { | |
102 | Info("~AliHBTReaderTPC","deleting Run Loader"); | |
103 | AliLoader::SetDebug(AliHBTParticle::GetDebug()); | |
104 | } | |
105 | ||
bed069a4 | 106 | delete fRunLoader; |
3f745d47 | 107 | |
108 | if (AliHBTParticle::GetDebug()) | |
109 | { | |
110 | Info("~AliHBTReaderTPC","deleting Run Loader Done"); | |
111 | } | |
bed069a4 | 112 | } |
1b446896 | 113 | /********************************************************************/ |
bed069a4 | 114 | |
115 | void AliHBTReaderTPC::Rewind() | |
116 | { | |
117 | delete fRunLoader; | |
118 | fRunLoader = 0x0; | |
119 | fCurrentDir = 0; | |
120 | fNEventsRead= 0; | |
121 | } | |
1b446896 | 122 | /********************************************************************/ |
123 | ||
bed069a4 | 124 | Int_t AliHBTReaderTPC::ReadNext() |
1b446896 | 125 | { |
126 | //reads data and puts put to the particles and tracks objects | |
127 | //reurns 0 if everything is OK | |
128 | // | |
8fe7288a | 129 | Info("Read",""); |
16701d1b | 130 | |
16701d1b | 131 | |
132 | TObjArray *tarray = new TObjArray(5000); //cotainer for tpc tracks | |
133 | tarray->SetOwner(); //set the ownership of the objects it contains | |
134 | //when array is is deleted or cleared all objects | |
135 | //that it contains are deleted | |
b71a5edb | 136 | |
bed069a4 | 137 | if (fParticlesEvent == 0x0) fParticlesEvent = new AliHBTEvent(); |
138 | if (fTracksEvent == 0x0) fTracksEvent = new AliHBTEvent(); | |
139 | ||
140 | fParticlesEvent->Reset(); | |
141 | fTracksEvent->Reset(); | |
b71a5edb | 142 | |
16701d1b | 143 | do //do{}while; is OK even if 0 dirs specified. In that case we try to read from "./" |
1b446896 | 144 | { |
bed069a4 | 145 | |
146 | if (fRunLoader == 0x0) | |
147 | if (OpenNextSession()) continue;//directory counter is increased inside in case of error | |
148 | ||
149 | if (fCurrentEvent == fRunLoader->GetNumberOfEvents()) | |
88cb7938 | 150 | { |
bed069a4 | 151 | //read next directory |
152 | delete fRunLoader;//close current session | |
153 | fRunLoader = 0x0;//assure pointer is null | |
154 | fCurrentDir++;//go to next dir | |
155 | continue;//directory counter is increased inside in case of error | |
16701d1b | 156 | } |
bed069a4 | 157 | |
158 | Info("ReadNext","Reading Event %d",fCurrentEvent); | |
1b446896 | 159 | |
bed069a4 | 160 | fRunLoader->GetEvent(fCurrentEvent); |
161 | TTree *tracktree = fTPCLoader->TreeT();//get the tree | |
162 | if (!tracktree) //check if we got the tree | |
163 | {//if not return with error | |
164 | Error("ReadNext","Can't get a tree with TPC tracks !\n"); | |
165 | continue; | |
166 | } | |
167 | ||
168 | TBranch *trackbranch=tracktree->GetBranch("tracks");//get the branch with tracks | |
169 | if (!trackbranch) ////check if we got the branch | |
170 | {//if not return with error | |
171 | Error("ReadNext","Can't get a branch with TPC tracks !\n"); | |
172 | continue; | |
173 | } | |
174 | Int_t ntpctracks=(Int_t)tracktree->GetEntries();//get number of TPC tracks | |
175 | Info("ReadNext","Found %d TPC tracks.",ntpctracks); | |
176 | //Copy tracks to array | |
177 | ||
178 | AliTPCtrack *iotrack=0; | |
179 | ||
180 | for (Int_t i=0; i<ntpctracks; i++) //loop over all tpc tracks | |
88cb7938 | 181 | { |
bed069a4 | 182 | iotrack=new AliTPCtrack; //create new tracks |
183 | trackbranch->SetAddress(&iotrack); //tell the branch ehere to put track data from tree(file) | |
184 | tracktree->GetEvent(i); //stream track i to the iotrack | |
185 | tarray->AddLast(iotrack); //put the track in the array | |
88cb7938 | 186 | } |
bed069a4 | 187 | |
188 | Double_t xk; | |
189 | Double_t par[5]; | |
190 | Float_t phi, lam, pt;//angles and transverse momentum | |
191 | Int_t label; //label of the current track | |
192 | ||
193 | AliStack* stack = fRunLoader->Stack(); | |
194 | if (stack == 0x0) | |
16701d1b | 195 | { |
bed069a4 | 196 | Error("ReadNext","Can not get stack for current event",fCurrentEvent); |
197 | fCurrentEvent++; | |
5ee8b891 | 198 | continue; |
16701d1b | 199 | } |
bed069a4 | 200 | stack->Particles(); |
201 | ||
202 | for (Int_t i=0; i<ntpctracks; i++) //loop over all good tracks | |
203 | { | |
204 | iotrack = (AliTPCtrack*)tarray->At(i); | |
205 | label = iotrack->GetLabel(); | |
206 | ||
207 | if (label < 0) continue; | |
3f745d47 | 208 | |
209 | if (CheckTrack(iotrack)) continue; | |
210 | ||
bed069a4 | 211 | TParticle *p = (TParticle*)stack->Particle(label); |
212 | ||
213 | if(p == 0x0) continue; //if returned pointer is NULL | |
214 | if(p->GetPDG() == 0x0) continue; //if particle has crezy PDG code (not known to our database) | |
215 | ||
216 | if(Pass(p->GetPdgCode())) continue; //check if we are intersted with particles of this type | |
217 | //if not take next partilce | |
218 | ||
219 | AliHBTParticle* part = new AliHBTParticle(*p,i); | |
220 | if(Pass(part)) { delete part; continue;}//check if meets all criteria of any of our cuts | |
221 | //if it does not delete it and take next good track | |
222 | ||
223 | // iotrack->PropagateTo(3.,0.0028,65.19); | |
224 | // iotrack->PropagateToVertex(36.66,1.2e-3);//orig | |
225 | iotrack->PropagateToVertex(50.,0.0353); | |
226 | ||
227 | iotrack->GetExternalParameters(xk,par); //get properties of the track | |
3f745d47 | 228 | |
bed069a4 | 229 | phi=TMath::ASin(par[2]) + iotrack->GetAlpha(); |
230 | if (phi<-TMath::Pi()) phi+=2*TMath::Pi(); | |
231 | if (phi>=TMath::Pi()) phi-=2*TMath::Pi(); | |
232 | lam=par[3]; | |
233 | pt=1.0/TMath::Abs(par[4]); | |
234 | ||
235 | Double_t tpx = pt * TMath::Cos(phi); //track x coordinate of momentum | |
236 | Double_t tpy = pt * TMath::Sin(phi); //track y coordinate of momentum | |
237 | Double_t tpz = pt * lam; //track z coordinate of momentum | |
238 | ||
239 | Double_t mass = p->GetMass(); | |
240 | Double_t tEtot = TMath::Sqrt( tpx*tpx + tpy*tpy + tpz*tpz + mass*mass);//total energy of the track | |
241 | ||
242 | AliHBTParticle* track = new AliHBTParticle(p->GetPdgCode(),i, tpx, tpy , tpz, tEtot, 0., 0., 0., 0.); | |
243 | if(Pass(track))//check if meets all criteria of any of our cuts | |
244 | //if it does not delete it and take next good track | |
245 | { | |
246 | delete track; | |
247 | delete part; | |
248 | continue; | |
249 | } | |
250 | fParticlesEvent->AddParticle(part); | |
251 | fTracksEvent->AddParticle(track); | |
252 | } | |
253 | ||
254 | Info("ReadNext","Read %d tracks and %d particles from event %d (event %d in dir %d).", | |
255 | fParticlesEvent->GetNumberOfParticles(), fTracksEvent->GetNumberOfParticles(), | |
256 | fNEventsRead,fCurrentEvent,fCurrentDir); | |
88cb7938 | 257 | |
bed069a4 | 258 | fCurrentEvent++; |
259 | fNEventsRead++; | |
260 | delete tarray; | |
261 | return 0; | |
262 | }while(fCurrentDir < GetNumberOfDirs()); | |
263 | ||
264 | delete tarray; | |
265 | return 1; | |
266 | } | |
267 | /********************************************************************/ | |
268 | ||
269 | Int_t AliHBTReaderTPC::OpenNextSession() | |
270 | { | |
271 | TString filename = GetDirName(fCurrentDir); | |
272 | if (filename.IsNull()) | |
273 | { | |
274 | DoOpenError("Can not get directory name"); | |
275 | return 1; | |
276 | } | |
277 | filename = filename +"/"+ fFileName; | |
278 | fRunLoader = AliRunLoader::Open(filename,AliConfig::fgkDefaultEventFolderName); | |
279 | if( fRunLoader == 0x0) | |
280 | { | |
281 | DoOpenError("Can not open session."); | |
282 | return 1; | |
283 | } | |
284 | ||
285 | fRunLoader->LoadHeader(); | |
286 | if (fRunLoader->GetNumberOfEvents() <= 0) | |
287 | { | |
288 | DoOpenError("There is no events in this directory."); | |
289 | return 1; | |
290 | } | |
291 | ||
292 | if (fRunLoader->LoadKinematics()) | |
293 | { | |
294 | DoOpenError("Error occured while loading kinematics."); | |
295 | return 1; | |
296 | } | |
297 | fTPCLoader = (AliTPCLoader*)fRunLoader->GetLoader("TPCLoader"); | |
298 | if ( fTPCLoader == 0x0) | |
299 | { | |
300 | DoOpenError("Exiting due to problems with opening files."); | |
301 | return 1; | |
302 | } | |
303 | Info("OpenNextSession","________________________________________________________"); | |
304 | Info("OpenNextSession","Found %d event(s) in directory %s", | |
305 | fRunLoader->GetNumberOfEvents(),GetDirName(fCurrentDir).Data()); | |
306 | Float_t mf; | |
307 | if (fUseMagFFromRun) | |
308 | { | |
309 | fRunLoader->LoadgAlice(); | |
310 | mf = fRunLoader->GetAliRun()->Field()->SolenoidField(); | |
311 | Info("OpenNextSession","Setting Magnetic Field from run: B=%fT",mf/10.); | |
312 | fRunLoader->UnloadgAlice(); | |
313 | } | |
314 | else | |
315 | { | |
316 | Info("OpenNextSession","Setting Own Magnetic Field: B=%fT",fMagneticField); | |
317 | if (fMagneticField == 0x0) | |
318 | { | |
319 | Fatal("OpenNextSession","Magnetic field can not be 0."); | |
320 | return 1;//pro forma | |
16701d1b | 321 | } |
bed069a4 | 322 | mf = fMagneticField*10.; |
323 | } | |
324 | AliKalmanTrack::SetConvConst(1000/0.299792458/mf); | |
1b446896 | 325 | |
16701d1b | 326 | |
bed069a4 | 327 | fRunLoader->CdGAFile(); |
328 | AliTPCParam *TPCParam= (AliTPCParam*)gDirectory->Get("75x40_100x60"); | |
329 | if (!TPCParam) | |
330 | { | |
331 | TPCParam=(AliTPCParam *)gDirectory->Get("75x40_100x60_150x60"); | |
332 | if (!TPCParam) | |
333 | { | |
334 | DoOpenError("TPC parameters have not been found !\n"); | |
335 | return 1; | |
336 | } | |
337 | } | |
338 | ||
339 | if (fTPCLoader->LoadTracks()) | |
340 | { | |
341 | DoOpenError("Error occured while loading TPC tracks."); | |
342 | return 1; | |
343 | } | |
88cb7938 | 344 | |
bed069a4 | 345 | fCurrentEvent = 0; |
1b446896 | 346 | return 0; |
bed069a4 | 347 | } |
348 | /********************************************************************/ | |
1b446896 | 349 | |
bed069a4 | 350 | void AliHBTReaderTPC::DoOpenError( const char *va_(fmt), ...) |
351 | { | |
352 | // Does error display and clean-up in case error caught on Open Next Session | |
353 | ||
354 | va_list ap; | |
355 | va_start(ap,va_(fmt)); | |
356 | Error("OpenNextSession", va_(fmt), ap); | |
357 | va_end(ap); | |
358 | ||
359 | delete fRunLoader; | |
360 | fRunLoader = 0x0; | |
361 | fTPCLoader = 0x0; | |
362 | fCurrentDir++; | |
363 | } | |
1b446896 | 364 | |
3f745d47 | 365 | /********************************************************************/ |
366 | Bool_t AliHBTReaderTPC::CheckTrack(AliTPCtrack* t) | |
367 | { | |
368 | //Performs check of the track | |
369 | if ( (t->GetNumberOfClusters() > fNClustMax) || (t->GetNumberOfClusters() < fNClustMin) ) return kTRUE; | |
370 | ||
371 | Double_t cc[15]; | |
372 | t->GetCovariance(cc); | |
373 | if ( (cc[9] < fC44Min) || (cc[9] > fC44Max) ) return kTRUE; | |
374 | ||
375 | Float_t chisqpercl = t->GetChi2()/((Double_t)t->GetNumberOfClusters()); | |
376 | if ( (chisqpercl < fNChi2PerClustMin) || (chisqpercl > fNChi2PerClustMax) ) return kTRUE; | |
377 | ||
378 | return kFALSE; | |
379 | ||
380 | } | |
381 | /********************************************************************/ | |
382 | ||
383 | void AliHBTReaderTPC::SetNClustersRange(Int_t min,Int_t max) | |
384 | { | |
385 | //sets range of Number Of Clusters that tracks have to have | |
386 | fNClustMin = min; | |
387 | fNClustMax = max; | |
388 | } | |
389 | /********************************************************************/ | |
390 | ||
391 | void AliHBTReaderTPC::SetChi2PerCluserRange(Float_t min, Float_t max) | |
392 | { | |
393 | //sets range of Chi2 per Cluster | |
394 | fNChi2PerClustMin = min; | |
395 | fNChi2PerClustMax = max; | |
396 | } | |
397 | /********************************************************************/ | |
398 | ||
399 | void AliHBTReaderTPC::SetC44Range(Float_t min, Float_t max) | |
400 | { | |
401 | //Sets range of C44 parameter of covariance matrix of the track | |
402 | //it defines uncertainty of the momentum | |
403 | fC44Min = min; | |
404 | fC44Max = max; | |
405 | } | |
406 | ||
1b446896 | 407 | /********************************************************************/ |
408 | /********************************************************************/ | |
409 | /********************************************************************/ | |
410 | ||
3f745d47 | 411 | /* |
412 | void (AliTPCtrack* iotrack, Double_t curv) | |
413 | { | |
414 | Double_t x[5]; | |
415 | iotrack->GetExternalPara | |
416 | //xk is a | |
417 | Double_t fP4=iotrack->GetC(); | |
418 | Double_t fP2=iotrack->GetEta(); | |
419 | ||
420 | Double_t x1=fX, x2=x1+(xk-x1), dx=x2-x1, y1=fP0, z1=fP1; | |
421 | Double_t c1=fP4*x1 - fP2, r1=sqrt(1.- c1*c1); | |
422 | Double_t c2=fP4*x2 - fP2, r2=sqrt(1.- c2*c2); | |
423 | ||
424 | fP0 += dx*(c1+c2)/(r1+r2); | |
425 | fP1 += dx*(c1+c2)/(c1*r2 + c2*r1)*fP3; | |
426 | ||
427 | } | |
428 | */ | |
429 |