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1 | /************************************************************************** | |
2 | * Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved. * | |
3 | * * | |
4 | * Author: The ALICE Off-line Project. * | |
5 | * Contributors are mentioned in the code where appropriate. * | |
6 | * * | |
7 | * Permission to use, copy, modify and distribute this software and its * | |
8 | * documentation strictly for non-commercial purposes is hereby granted * | |
9 | * without fee, provided that the above copyright notice appears in all * | |
10 | * copies and that both the copyright notice and this permission notice * | |
11 | * appear in the supporting documentation. The authors make no claims * | |
12 | * about the suitability of this software for any purpose. It is * | |
13 | * provided "as is" without express or implied warranty. * | |
14 | **************************************************************************/ | |
15 | /* $Id$ */ | |
16 | ||
17 | /* History of cvs commits: | |
18 | * | |
19 | * $Log$ | |
20 | * Revision 1.6 2007/08/22 09:20:50 hristov | |
21 | * Updated QA classes (Yves) | |
22 | * | |
23 | * Revision 1.5 2007/07/11 13:43:30 hristov | |
24 | * New class AliESDEvent, backward compatibility with the old AliESD (Christian) | |
25 | * | |
26 | * Revision 1.4 2007/05/04 14:49:29 policheh | |
27 | * AliPHOSRecPoint inheritance from AliCluster | |
28 | * | |
29 | * Revision 1.3 2007/04/25 19:39:42 kharlov | |
30 | * Track extracpolation improved | |
31 | * | |
32 | * Revision 1.2 2007/04/01 19:16:52 kharlov | |
33 | * D.P.: Produce EMCTrackSegments using TPC/ITS tracks (no CPV) | |
34 | * | |
35 | * | |
36 | */ | |
37 | ||
38 | //_________________________________________________________________________ | |
39 | // Implementation version 2 of algorithm class to construct PHOS track segments | |
40 | // Track segment for PHOS is list of | |
41 | // EMC RecPoint + (possibly) projection of TPC track | |
42 | // To find TrackSegments we do the following: | |
43 | // for each EMC RecPoints we look at | |
44 | // TPC projections radius fRtpc. | |
45 | // If there is such a track | |
46 | // we make "Link" it is just indexes of EMC and TPC track and distance | |
47 | // between them in the PHOS plane. | |
48 | // Then we sort "Links" and starting from the | |
49 | // least "Link" pointing to the unassined EMC and TPC assing them to | |
50 | // new TrackSegment. | |
51 | // If there is no TPC track we make TrackSegment | |
52 | // consisting from EMC alone. There is no TrackSegments without EMC RecPoint. | |
53 | //// In principle this class should be called from AliPHOSReconstructor, but | |
54 | // one can use it as well in standalone mode. | |
55 | // Use case: | |
56 | // root [0] AliPHOSTrackSegmentMakerv2 * t = new AliPHOSTrackSegmentMaker("galice.root", "tracksegmentsname", "recpointsname") | |
57 | // Warning in <TDatabasePDG::TDatabasePDG>: object already instantiated | |
58 | // // reads gAlice from header file "galice.root", uses recpoints stored in the branch names "recpointsname" (default = "Default") | |
59 | // // and saves recpoints in branch named "tracksegmentsname" (default = "recpointsname") | |
60 | // root [1] t->ExecuteTask() | |
61 | // root [3] t->SetTrackSegmentsBranch("max distance 5 cm") | |
62 | // root [4] t->ExecuteTask("deb all time") | |
63 | // | |
64 | //*-- Author: Dmitri Peressounko (RRC Ki & SUBATECH) & Yves Schutz (SUBATECH) | |
65 | // | |
66 | ||
67 | // --- ROOT system --- | |
68 | #include "TFile.h" | |
69 | #include "TTree.h" | |
70 | #include "TBenchmark.h" | |
71 | ||
72 | // --- Standard library --- | |
73 | #include "Riostream.h" | |
74 | // --- AliRoot header files --- | |
75 | #include "AliPHOSGeometry.h" | |
76 | #include "AliPHOSTrackSegmentMakerv2.h" | |
77 | #include "AliPHOSTrackSegment.h" | |
78 | #include "AliPHOSLink.h" | |
79 | #include "AliPHOSGetter.h" | |
80 | ||
81 | #include "AliESDEvent.h" | |
82 | #include "AliESDtrack.h" | |
83 | ||
84 | ClassImp( AliPHOSTrackSegmentMakerv2) | |
85 | ||
86 | ||
87 | //____________________________________________________________________________ | |
88 | AliPHOSTrackSegmentMakerv2::AliPHOSTrackSegmentMakerv2() : | |
89 | AliPHOSTrackSegmentMaker(), | |
90 | fDefaultInit(kTRUE), | |
91 | fWrite(kFALSE), | |
92 | fNTrackSegments(0), | |
93 | fRtpc(0.f), | |
94 | fVtx(0.,0.,0.), | |
95 | fLinkUpArray(0), | |
96 | fTPCtracks(), | |
97 | fEmcFirst(0), | |
98 | fEmcLast(0), | |
99 | fModule(0), | |
100 | fTrackSegments(NULL) | |
101 | { | |
102 | // default ctor (to be used mainly by Streamer) | |
103 | InitParameters() ; | |
104 | } | |
105 | ||
106 | //____________________________________________________________________________ | |
107 | AliPHOSTrackSegmentMakerv2::AliPHOSTrackSegmentMakerv2(AliPHOSGeometry *geom) : | |
108 | AliPHOSTrackSegmentMaker(geom), | |
109 | fDefaultInit(kFALSE), | |
110 | fWrite(kFALSE), | |
111 | fNTrackSegments(0), | |
112 | fRtpc(0.f), | |
113 | fVtx(0.,0.,0.), | |
114 | fLinkUpArray(0), | |
115 | fTPCtracks(), | |
116 | fEmcFirst(0), | |
117 | fEmcLast(0), | |
118 | fModule(0), | |
119 | fTrackSegments(NULL) | |
120 | { | |
121 | // ctor | |
122 | InitParameters() ; | |
123 | Init() ; | |
124 | fESD = 0; | |
125 | } | |
126 | ||
127 | //____________________________________________________________________________ | |
128 | AliPHOSTrackSegmentMakerv2::AliPHOSTrackSegmentMakerv2(const AliPHOSTrackSegmentMakerv2 & tsm) : | |
129 | AliPHOSTrackSegmentMaker(tsm), | |
130 | fDefaultInit(kFALSE), | |
131 | fWrite(kFALSE), | |
132 | fNTrackSegments(0), | |
133 | fRtpc(0.f), | |
134 | fVtx(0.,0.,0.), | |
135 | fLinkUpArray(0), | |
136 | fTPCtracks(), | |
137 | fEmcFirst(0), | |
138 | fEmcLast(0), | |
139 | fModule(0), | |
140 | fTrackSegments(NULL) | |
141 | { | |
142 | // cpy ctor: no implementation yet | |
143 | // requested by the Coding Convention | |
144 | Fatal("cpy ctor", "not implemented") ; | |
145 | } | |
146 | ||
147 | ||
148 | //____________________________________________________________________________ | |
149 | AliPHOSTrackSegmentMakerv2::~AliPHOSTrackSegmentMakerv2() | |
150 | { | |
151 | // dtor | |
152 | // fDefaultInit = kTRUE if TrackSegmentMaker created by default ctor (to get just the parameters) | |
153 | if (!fDefaultInit) | |
154 | delete fLinkUpArray ; | |
155 | if (fTrackSegments) { | |
156 | fTrackSegments->Delete(); | |
157 | delete fTrackSegments; | |
158 | } | |
159 | } | |
160 | ||
161 | //____________________________________________________________________________ | |
162 | void AliPHOSTrackSegmentMakerv2::FillOneModule() | |
163 | { | |
164 | // Finds first and last indexes between which | |
165 | // clusters from one PHOS module are | |
166 | ||
167 | //First EMC clusters | |
168 | Int_t totalEmc = fEMCRecPoints->GetEntriesFast() ; | |
169 | for(fEmcFirst = fEmcLast; (fEmcLast < totalEmc) && | |
170 | ((dynamic_cast<AliPHOSRecPoint *>(fEMCRecPoints->At(fEmcLast)))->GetPHOSMod() == fModule ); | |
171 | fEmcLast ++) ; | |
172 | ||
173 | //Now TPC tracks | |
174 | if(fESD){ | |
175 | //Do it ones, only first time | |
176 | if(fModule==1){ | |
177 | Int_t nTracks = fESD->GetNumberOfTracks(); | |
178 | ||
179 | Int_t nPHOSmod = fGeom->GetNModules() ; | |
180 | if(fTPCtracks[0].size()<(UInt_t)nTracks){ | |
181 | for(Int_t i=0; i<nPHOSmod; i++) | |
182 | fTPCtracks[i].resize(nTracks) ; | |
183 | } | |
184 | for(Int_t i=0; i<5; i++)fNtpcTracks[i]=0 ; | |
185 | TVector3 inPHOS ; | |
186 | ||
187 | //In this particular case we use fixed vertex position at zero | |
188 | Double_t vtx[3]={0.,0.,0.} ; | |
189 | AliESDtrack *track; | |
190 | Double_t xyz[3] ; | |
191 | Double_t rEMC = fGeom->GetIPtoCrystalSurface() ; //Use here ideal geometry | |
192 | for (Int_t iTrack=0; iTrack<nTracks; iTrack++) { | |
193 | track = fESD->GetTrack(iTrack); | |
194 | for(Int_t iTestMod=1; iTestMod<=nPHOSmod; iTestMod++){ | |
195 | Double_t modAngle=270.+fGeom->GetPHOSAngle(iTestMod) ; | |
196 | modAngle*=TMath::Pi()/180. ; | |
197 | track->Rotate(modAngle); | |
198 | if (!track->GetXYZAt(rEMC, fESD->GetMagneticField(), xyz)) | |
199 | continue; //track coord on the cylinder of PHOS radius | |
200 | if ((TMath::Abs(xyz[0])+TMath::Abs(xyz[1])+TMath::Abs(xyz[2]))<=0) | |
201 | continue; | |
202 | //Check if this track hits PHOS | |
203 | inPHOS.SetXYZ(xyz[0],xyz[1],xyz[2]); | |
204 | Int_t modNum ; | |
205 | Double_t x,z ; | |
206 | fGeom->ImpactOnEmc(vtx, inPHOS.Theta(), inPHOS.Phi(), modNum, z, x) ; | |
207 | if(modNum==iTestMod){ | |
208 | //Mark this track as one belonging to module | |
209 | TrackInPHOS_t &t = fTPCtracks[modNum-1][fNtpcTracks[modNum-1]++] ; | |
210 | t.track = track ; | |
211 | t.x = x ; | |
212 | t.z = z ; | |
213 | break ; | |
214 | } | |
215 | } | |
216 | } | |
217 | } | |
218 | } | |
219 | ||
220 | } | |
221 | ||
222 | //____________________________________________________________________________ | |
223 | void AliPHOSTrackSegmentMakerv2::GetDistanceInPHOSPlane(AliPHOSEmcRecPoint * emcClu, | |
224 | AliESDtrack *track, | |
225 | Float_t &dx, Float_t &dz) const | |
226 | { | |
227 | // Calculates the distance between the EMC RecPoint and the CPV RecPoint | |
228 | // Clusters are sorted in "rows" and "columns" of width 1 cm | |
229 | ||
230 | TVector3 emcGlobal; // Global position of the EMC recpoint | |
231 | fGeom->GetGlobalPHOS((AliPHOSRecPoint*)emcClu,emcGlobal); | |
232 | ||
233 | //Calculate actual distance to the PHOS surface | |
234 | Double_t modAngle=270.+fGeom->GetPHOSAngle(emcClu->GetPHOSMod()) ; | |
235 | modAngle*=TMath::Pi()/180. ; | |
236 | Double_t rEMC = emcGlobal.X()*TMath::Cos(modAngle)+emcGlobal.Y()*TMath::Sin(modAngle) ; | |
237 | track->Rotate(modAngle); | |
238 | Double_t xyz[3] ; | |
239 | if(!track->GetXYZAt(rEMC, fESD->GetMagneticField(), xyz)){ | |
240 | dx=999. ; | |
241 | dz=999. ; | |
242 | return ; //track coord on the cylinder of PHOS radius | |
243 | } | |
244 | if((TMath::Abs(xyz[0])+TMath::Abs(xyz[1])+TMath::Abs(xyz[2]))<=0){ | |
245 | dx=999. ; | |
246 | dz=999. ; | |
247 | return ; | |
248 | } | |
249 | ||
250 | dx=(emcGlobal.X()-xyz[0])*TMath::Sin(modAngle)-(emcGlobal.Y()-xyz[1])*TMath::Cos(modAngle) ; | |
251 | dx=TMath::Sign(dx,(Float_t)(emcGlobal.X()-xyz[0])) ; //set direction | |
252 | dz=emcGlobal.Z()-xyz[2] ; | |
253 | ||
254 | return ; | |
255 | } | |
256 | //____________________________________________________________________________ | |
257 | void AliPHOSTrackSegmentMakerv2::Init() | |
258 | { | |
259 | // Make all memory allocations that are not possible in default constructor | |
260 | ||
261 | fLinkUpArray = new TClonesArray("AliPHOSLink", 1000); | |
262 | fTrackSegments = new TClonesArray("AliPHOSTrackSegment",100); | |
263 | } | |
264 | ||
265 | //____________________________________________________________________________ | |
266 | void AliPHOSTrackSegmentMakerv2::InitParameters() | |
267 | { | |
268 | //Initializes parameters | |
269 | fRtpc = 4. ; | |
270 | fEmcFirst = 0 ; | |
271 | fEmcLast = 0 ; | |
272 | fLinkUpArray = 0 ; | |
273 | fWrite = kTRUE ; | |
274 | } | |
275 | ||
276 | ||
277 | //____________________________________________________________________________ | |
278 | void AliPHOSTrackSegmentMakerv2::MakeLinks() | |
279 | { | |
280 | // Finds distances (links) between all EMC and CPV clusters, | |
281 | // which are not further apart from each other than fRcpv | |
282 | // and sort them in accordance with this distance | |
283 | ||
284 | fLinkUpArray->Clear() ; | |
285 | ||
286 | AliPHOSEmcRecPoint * emcclu ; | |
287 | ||
288 | Int_t iLinkUp = 0 ; | |
289 | ||
290 | Int_t iEmcRP; | |
291 | for(iEmcRP = fEmcFirst; iEmcRP < fEmcLast; iEmcRP++ ) { | |
292 | emcclu = dynamic_cast<AliPHOSEmcRecPoint *>(fEMCRecPoints->At(iEmcRP)) ; | |
293 | TVector3 vecEmc ; | |
294 | emcclu->GetLocalPosition(vecEmc) ; | |
295 | Int_t mod=emcclu->GetPHOSMod() ; | |
296 | for(Int_t itr=0; itr<fNtpcTracks[mod-1] ; itr++){ | |
297 | TrackInPHOS_t &t = fTPCtracks[mod-1][itr] ; | |
298 | //calculate raw distance | |
299 | Double_t rawdx = t.x - vecEmc.X() ; | |
300 | Double_t rawdz = t.z - vecEmc.Z() ; | |
301 | if(TMath::Sqrt(rawdx*rawdx+rawdz*rawdz)<fRtpc){ | |
302 | Float_t dx,dz ; | |
303 | //calculate presize difference accounting misalignment | |
304 | GetDistanceInPHOSPlane(emcclu, t.track, dx,dz) ; | |
305 | Int_t itrack = t.track->GetID() ; | |
306 | new ((*fLinkUpArray)[iLinkUp++]) AliPHOSLink(dx, dz, iEmcRP, itrack, -1) ; | |
307 | } | |
308 | } | |
309 | } | |
310 | fLinkUpArray->Sort() ; //first links with smallest distances | |
311 | } | |
312 | ||
313 | //____________________________________________________________________________ | |
314 | void AliPHOSTrackSegmentMakerv2::MakePairs() | |
315 | { | |
316 | // Using the previously made list of "links", we found the smallest link - i.e. | |
317 | // link with the least distance between EMC and CPV and pointing to still | |
318 | // unassigned RecParticles. We assign these RecPoints to TrackSegment and | |
319 | // remove them from the list of "unassigned". | |
320 | ||
321 | //Make arrays to mark clusters already chosen | |
322 | Int_t * emcExist = 0; | |
323 | if(fEmcLast > fEmcFirst) | |
324 | emcExist = new Int_t[fEmcLast-fEmcFirst] ; | |
325 | ||
326 | Int_t index; | |
327 | for(index = 0; index <fEmcLast-fEmcFirst; index ++) | |
328 | emcExist[index] = 1 ; | |
329 | ||
330 | ||
331 | Bool_t * tpcExist = 0; | |
332 | Int_t nTracks = fESD->GetNumberOfTracks(); | |
333 | if(nTracks>0) | |
334 | tpcExist = new Bool_t[nTracks] ; | |
335 | ||
336 | for(index = 0; index <nTracks; index ++) | |
337 | tpcExist[index] = 1 ; | |
338 | ||
339 | ||
340 | // Finds the smallest links and makes pairs of CPV and EMC clusters with smallest distance | |
341 | TIter nextUp(fLinkUpArray) ; | |
342 | ||
343 | AliPHOSLink * linkUp ; | |
344 | ||
345 | AliPHOSCpvRecPoint * nullpointer = 0 ; | |
346 | ||
347 | while ( (linkUp = static_cast<AliPHOSLink *>(nextUp()) ) ){ | |
348 | ||
349 | if(emcExist[linkUp->GetEmc()-fEmcFirst] != -1){ | |
350 | ||
351 | if(tpcExist[linkUp->GetCpv()]){ //Track still exist | |
352 | Float_t dx,dz ; | |
353 | linkUp->GetXZ(dx,dz) ; | |
354 | new ((* fTrackSegments)[fNTrackSegments]) | |
355 | AliPHOSTrackSegment(dynamic_cast<AliPHOSEmcRecPoint *>(fEMCRecPoints->At(linkUp->GetEmc())) , | |
356 | nullpointer, | |
357 | linkUp->GetTrack(),dx,dz) ; | |
358 | (dynamic_cast<AliPHOSTrackSegment *>(fTrackSegments->At(fNTrackSegments)))->SetIndexInList(fNTrackSegments); | |
359 | fNTrackSegments++ ; | |
360 | emcExist[linkUp->GetEmc()-fEmcFirst] = -1 ; //Mark emc that Cpv was found | |
361 | //mark track as already used | |
362 | tpcExist[linkUp->GetCpv()] = kFALSE ; | |
363 | } //if CpvUp still exist | |
364 | } | |
365 | } | |
366 | ||
367 | //look through emc recPoints left without CPV | |
368 | if(emcExist){ //if there is emc rec point | |
369 | Int_t iEmcRP ; | |
370 | for(iEmcRP = 0; iEmcRP < fEmcLast-fEmcFirst ; iEmcRP++ ){ | |
371 | if(emcExist[iEmcRP] > 0 ){ | |
372 | new ((*fTrackSegments)[fNTrackSegments]) | |
373 | AliPHOSTrackSegment(dynamic_cast<AliPHOSEmcRecPoint *>(fEMCRecPoints->At(iEmcRP+fEmcFirst)), | |
374 | nullpointer) ; | |
375 | (dynamic_cast<AliPHOSTrackSegment *>(fTrackSegments->At(fNTrackSegments)))->SetIndexInList(fNTrackSegments); | |
376 | fNTrackSegments++; | |
377 | } | |
378 | } | |
379 | } | |
380 | delete [] emcExist ; | |
381 | delete [] tpcExist ; | |
382 | } | |
383 | ||
384 | //____________________________________________________________________________ | |
385 | void AliPHOSTrackSegmentMakerv2::Clusters2TrackSegments(Option_t *option) | |
386 | { | |
387 | // Steering method to perform track segment construction for events | |
388 | // in the range from fFirstEvent to fLastEvent. | |
389 | // This range is optionally set by SetEventRange(). | |
390 | // if fLastEvent=-1 (by default), then process events until the end. | |
391 | ||
392 | if(strstr(option,"tim")) | |
393 | gBenchmark->Start("PHOSTSMaker"); | |
394 | ||
395 | if(strstr(option,"print")) { | |
396 | Print() ; | |
397 | return ; | |
398 | } | |
399 | ||
400 | //Make some initializations | |
401 | fNTrackSegments = 0 ; | |
402 | fEmcFirst = 0 ; | |
403 | fEmcLast = 0 ; | |
404 | ||
405 | fTrackSegments->Clear(); | |
406 | ||
407 | // if(!ReadRecPoints(ievent)) continue; //reads RecPoints for event ievent | |
408 | ||
409 | for(fModule = 1; fModule <= fGeom->GetNModules() ; fModule++ ) { | |
410 | FillOneModule() ; | |
411 | MakeLinks() ; | |
412 | MakePairs() ; | |
413 | } | |
414 | ||
415 | if(strstr(option,"deb")) | |
416 | PrintTrackSegments(option); | |
417 | ||
418 | if(strstr(option,"tim")){ | |
419 | gBenchmark->Stop("PHOSTSMaker"); | |
420 | Info("Exec", "took %f seconds for making TS", | |
421 | gBenchmark->GetCpuTime("PHOSTSMaker")); | |
422 | } | |
423 | } | |
424 | ||
425 | //____________________________________________________________________________ | |
426 | void AliPHOSTrackSegmentMakerv2::Print(const Option_t *)const | |
427 | { | |
428 | // Print TrackSegmentMaker parameters | |
429 | ||
430 | TString message("") ; | |
431 | if( strcmp(GetName(), "") != 0 ) { | |
432 | message = "\n======== AliPHOSTrackSegmentMakerv2 ========\n" ; | |
433 | message += "Making Track segments\n" ; | |
434 | message += "with parameters:\n" ; | |
435 | message += " Maximal EMC - TPC distance (cm) %f\n" ; | |
436 | message += "============================================\n" ; | |
437 | Info("Print", message.Data(),fRtpc) ; | |
438 | } | |
439 | else | |
440 | Info("Print", "AliPHOSTrackSegmentMakerv2 not initialized ") ; | |
441 | ||
442 | } | |
443 | ||
444 | //____________________________________________________________________________ | |
445 | void AliPHOSTrackSegmentMakerv2::PrintTrackSegments(Option_t * option) | |
446 | { | |
447 | // option deb - prints # of found TrackSegments | |
448 | // option deb all - prints as well indexed of found RecParticles assigned to the TS | |
449 | ||
450 | Info("PrintTrackSegments", "Results from TrackSegmentMaker:") ; | |
451 | printf(" Found %d TrackSegments\n", fTrackSegments->GetEntriesFast() ); | |
452 | ||
453 | if(strstr(option,"all")) { // printing found TS | |
454 | printf("TrackSegment # EMC RP# CPV RP#\n") ; | |
455 | Int_t index; | |
456 | for (index = 0 ; index <fTrackSegments->GetEntriesFast() ; index++) { | |
457 | AliPHOSTrackSegment * ts = (AliPHOSTrackSegment * )fTrackSegments->At(index) ; | |
458 | printf(" %d %d %d \n", ts->GetIndexInList(), ts->GetEmcIndex(), ts->GetTrackIndex() ) ; | |
459 | } | |
460 | } | |
461 | } |