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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 "AliPHOSEmcRecPoint.h" | |
80 | #include "AliPHOSCpvRecPoint.h" | |
81 | ||
82 | #include "AliESDEvent.h" | |
83 | #include "AliESDtrack.h" | |
84 | ||
85 | ClassImp( AliPHOSTrackSegmentMakerv2) | |
86 | ||
87 | ||
88 | //____________________________________________________________________________ | |
89 | AliPHOSTrackSegmentMakerv2::AliPHOSTrackSegmentMakerv2() : | |
90 | AliPHOSTrackSegmentMaker(), | |
91 | fDefaultInit(kTRUE), | |
92 | fWrite(kFALSE), | |
93 | fNTrackSegments(0), | |
94 | fRtpc(0.f), | |
95 | fVtx(0.,0.,0.), | |
96 | fLinkUpArray(0), | |
97 | fTPCtracks(), | |
98 | fEmcFirst(0), | |
99 | fEmcLast(0), | |
100 | fModule(0), | |
101 | fTrackSegments(NULL) | |
102 | { | |
103 | // default ctor (to be used mainly by Streamer) | |
104 | ||
105 | for(Int_t i=0; i<5; i++)fNtpcTracks[i]=0 ; | |
106 | InitParameters() ; | |
107 | } | |
108 | ||
109 | //____________________________________________________________________________ | |
110 | AliPHOSTrackSegmentMakerv2::AliPHOSTrackSegmentMakerv2(AliPHOSGeometry *geom) : | |
111 | AliPHOSTrackSegmentMaker(geom), | |
112 | fDefaultInit(kFALSE), | |
113 | fWrite(kFALSE), | |
114 | fNTrackSegments(0), | |
115 | fRtpc(0.f), | |
116 | fVtx(0.,0.,0.), | |
117 | fLinkUpArray(0), | |
118 | fTPCtracks(), | |
119 | fEmcFirst(0), | |
120 | fEmcLast(0), | |
121 | fModule(0), | |
122 | fTrackSegments(NULL) | |
123 | { | |
124 | // ctor | |
125 | for(Int_t i=0; i<5; i++)fNtpcTracks[i]=0 ; | |
126 | ||
127 | InitParameters() ; | |
128 | Init() ; | |
129 | fESD = 0; | |
130 | } | |
131 | ||
132 | //____________________________________________________________________________ | |
133 | AliPHOSTrackSegmentMakerv2::AliPHOSTrackSegmentMakerv2(const AliPHOSTrackSegmentMakerv2 & tsm) : | |
134 | AliPHOSTrackSegmentMaker(tsm), | |
135 | fDefaultInit(kFALSE), | |
136 | fWrite(kFALSE), | |
137 | fNTrackSegments(0), | |
138 | fRtpc(0.f), | |
139 | fVtx(0.,0.,0.), | |
140 | fLinkUpArray(0), | |
141 | fTPCtracks(), | |
142 | fEmcFirst(0), | |
143 | fEmcLast(0), | |
144 | fModule(0), | |
145 | fTrackSegments(NULL) | |
146 | { | |
147 | // cpy ctor: no implementation yet | |
148 | // requested by the Coding Convention | |
149 | Fatal("cpy ctor", "not implemented") ; | |
150 | } | |
151 | ||
152 | ||
153 | //____________________________________________________________________________ | |
154 | AliPHOSTrackSegmentMakerv2::~AliPHOSTrackSegmentMakerv2() | |
155 | { | |
156 | // dtor | |
157 | // fDefaultInit = kTRUE if TrackSegmentMaker created by default ctor (to get just the parameters) | |
158 | if (!fDefaultInit) | |
159 | delete fLinkUpArray ; | |
160 | if (fTrackSegments) { | |
161 | fTrackSegments->Delete(); | |
162 | delete fTrackSegments; | |
163 | } | |
164 | } | |
165 | ||
166 | //____________________________________________________________________________ | |
167 | void AliPHOSTrackSegmentMakerv2::FillOneModule() | |
168 | { | |
169 | // Finds first and last indexes between which | |
170 | // clusters from one PHOS module are | |
171 | ||
172 | //First EMC clusters | |
173 | Int_t totalEmc = fEMCRecPoints->GetEntriesFast() ; | |
174 | for(fEmcFirst = fEmcLast; (fEmcLast < totalEmc) && | |
175 | ((static_cast<AliPHOSRecPoint *>(fEMCRecPoints->At(fEmcLast)))->GetPHOSMod() == fModule ); | |
176 | fEmcLast ++) ; | |
177 | ||
178 | //Now TPC tracks | |
179 | if(fESD){ | |
180 | //Do it ones, only first time | |
181 | if(fModule==1){ | |
182 | Int_t nTracks = fESD->GetNumberOfTracks(); | |
183 | ||
184 | Int_t nPHOSmod = fGeom->GetNModules() ; | |
185 | if(fTPCtracks[0].size()<(UInt_t)nTracks){ | |
186 | for(Int_t i=0; i<nPHOSmod; i++) | |
187 | fTPCtracks[i].resize(nTracks) ; | |
188 | } | |
189 | for(Int_t i=0; i<5; i++)fNtpcTracks[i]=0 ; | |
190 | TVector3 inPHOS ; | |
191 | ||
192 | //In this particular case we use fixed vertex position at zero | |
193 | Double_t vtx[3]={0.,0.,0.} ; | |
194 | AliESDtrack *track; | |
195 | Double_t xyz[3] ; | |
196 | Double_t rEMC = fGeom->GetIPtoCrystalSurface() ; //Use here ideal geometry | |
197 | for (Int_t iTrack=0; iTrack<nTracks; iTrack++) { | |
198 | track = fESD->GetTrack(iTrack); | |
199 | for(Int_t iTestMod=1; iTestMod<=nPHOSmod; iTestMod++){ | |
200 | Double_t modAngle=270.+fGeom->GetPHOSAngle(iTestMod) ; | |
201 | modAngle*=TMath::Pi()/180. ; | |
202 | track->Rotate(modAngle); | |
203 | if (!track->GetXYZAt(rEMC, fESD->GetMagneticField(), xyz)) | |
204 | continue; //track coord on the cylinder of PHOS radius | |
205 | if ((TMath::Abs(xyz[0])+TMath::Abs(xyz[1])+TMath::Abs(xyz[2]))<=0) | |
206 | continue; | |
207 | //Check if this track hits PHOS | |
208 | inPHOS.SetXYZ(xyz[0],xyz[1],xyz[2]); | |
209 | Int_t modNum ; | |
210 | Double_t x,z ; | |
211 | fGeom->ImpactOnEmc(vtx, inPHOS.Theta(), inPHOS.Phi(), modNum, z, x) ; | |
212 | if(modNum==iTestMod){ | |
213 | //Mark this track as one belonging to module | |
214 | TrackInPHOS_t &t = fTPCtracks[modNum-1][fNtpcTracks[modNum-1]++] ; | |
215 | t.track = track ; | |
216 | t.x = x ; | |
217 | t.z = z ; | |
218 | break ; | |
219 | } | |
220 | } | |
221 | } | |
222 | } | |
223 | } | |
224 | ||
225 | } | |
226 | ||
227 | //____________________________________________________________________________ | |
228 | void AliPHOSTrackSegmentMakerv2::GetDistanceInPHOSPlane(AliPHOSEmcRecPoint * emcClu, | |
229 | AliESDtrack *track, | |
230 | Float_t &dx, Float_t &dz) const | |
231 | { | |
232 | // Calculates the distance between the EMC RecPoint and the CPV RecPoint | |
233 | // Clusters are sorted in "rows" and "columns" of width 1 cm | |
234 | ||
235 | TVector3 emcGlobal; // Global position of the EMC recpoint | |
236 | fGeom->GetGlobalPHOS((AliPHOSRecPoint*)emcClu,emcGlobal); | |
237 | ||
238 | //Calculate actual distance to the PHOS surface | |
239 | Double_t modAngle=270.+fGeom->GetPHOSAngle(emcClu->GetPHOSMod()) ; | |
240 | modAngle*=TMath::Pi()/180. ; | |
241 | Double_t rEMC = emcGlobal.X()*TMath::Cos(modAngle)+emcGlobal.Y()*TMath::Sin(modAngle) ; | |
242 | track->Rotate(modAngle); | |
243 | Double_t xyz[3] ; | |
244 | if(!track->GetXYZAt(rEMC, fESD->GetMagneticField(), xyz)){ | |
245 | dx=999. ; | |
246 | dz=999. ; | |
247 | return ; //track coord on the cylinder of PHOS radius | |
248 | } | |
249 | if((TMath::Abs(xyz[0])+TMath::Abs(xyz[1])+TMath::Abs(xyz[2]))<=0){ | |
250 | dx=999. ; | |
251 | dz=999. ; | |
252 | return ; | |
253 | } | |
254 | ||
255 | dx=(emcGlobal.X()-xyz[0])*TMath::Sin(modAngle)-(emcGlobal.Y()-xyz[1])*TMath::Cos(modAngle) ; | |
256 | dx=TMath::Sign(dx,(Float_t)(emcGlobal.X()-xyz[0])) ; //set direction | |
257 | dz=emcGlobal.Z()-xyz[2] ; | |
258 | ||
259 | return ; | |
260 | } | |
261 | //____________________________________________________________________________ | |
262 | void AliPHOSTrackSegmentMakerv2::Init() | |
263 | { | |
264 | // Make all memory allocations that are not possible in default constructor | |
265 | ||
266 | fLinkUpArray = new TClonesArray("AliPHOSLink", 1000); | |
267 | fTrackSegments = new TClonesArray("AliPHOSTrackSegment",100); | |
268 | } | |
269 | ||
270 | //____________________________________________________________________________ | |
271 | void AliPHOSTrackSegmentMakerv2::InitParameters() | |
272 | { | |
273 | //Initializes parameters | |
274 | fRtpc = 4. ; | |
275 | fEmcFirst = 0 ; | |
276 | fEmcLast = 0 ; | |
277 | fLinkUpArray = 0 ; | |
278 | fWrite = kTRUE ; | |
279 | } | |
280 | ||
281 | ||
282 | //____________________________________________________________________________ | |
283 | void AliPHOSTrackSegmentMakerv2::MakeLinks() | |
284 | { | |
285 | // Finds distances (links) between all EMC and CPV clusters, | |
286 | // which are not further apart from each other than fRcpv | |
287 | // and sort them in accordance with this distance | |
288 | ||
289 | fLinkUpArray->Clear() ; | |
290 | ||
291 | AliPHOSEmcRecPoint * emcclu ; | |
292 | ||
293 | Int_t iLinkUp = 0 ; | |
294 | ||
295 | Int_t iEmcRP; | |
296 | for(iEmcRP = fEmcFirst; iEmcRP < fEmcLast; iEmcRP++ ) { | |
297 | emcclu = static_cast<AliPHOSEmcRecPoint *>(fEMCRecPoints->At(iEmcRP)) ; | |
298 | TVector3 vecEmc ; | |
299 | emcclu->GetLocalPosition(vecEmc) ; | |
300 | Int_t mod=emcclu->GetPHOSMod() ; | |
301 | for(Int_t itr=0; itr<fNtpcTracks[mod-1] ; itr++){ | |
302 | TrackInPHOS_t &t = fTPCtracks[mod-1][itr] ; | |
303 | //calculate raw distance | |
304 | Double_t rawdx = t.x - vecEmc.X() ; | |
305 | Double_t rawdz = t.z - vecEmc.Z() ; | |
306 | if(TMath::Sqrt(rawdx*rawdx+rawdz*rawdz)<fRtpc){ | |
307 | Float_t dx,dz ; | |
308 | //calculate presize difference accounting misalignment | |
309 | GetDistanceInPHOSPlane(emcclu, t.track, dx,dz) ; | |
310 | Int_t itrack = t.track->GetID() ; | |
311 | new ((*fLinkUpArray)[iLinkUp++]) AliPHOSLink(dx, dz, iEmcRP, itrack, -1) ; | |
312 | } | |
313 | } | |
314 | } | |
315 | fLinkUpArray->Sort() ; //first links with smallest distances | |
316 | } | |
317 | ||
318 | //____________________________________________________________________________ | |
319 | void AliPHOSTrackSegmentMakerv2::MakePairs() | |
320 | { | |
321 | // Using the previously made list of "links", we found the smallest link - i.e. | |
322 | // link with the least distance between EMC and CPV and pointing to still | |
323 | // unassigned RecParticles. We assign these RecPoints to TrackSegment and | |
324 | // remove them from the list of "unassigned". | |
325 | ||
326 | //Make arrays to mark clusters already chosen | |
327 | Int_t * emcExist = 0; | |
328 | ||
329 | if(fEmcLast > fEmcFirst) | |
330 | emcExist = new Int_t[fEmcLast-fEmcFirst] ; | |
331 | else | |
332 | AliFatal(Form("fEmcLast > fEmcFirst: %d > %d is not true!",fEmcLast,fEmcFirst)); | |
333 | ||
334 | Int_t index; | |
335 | for(index = 0; index <fEmcLast-fEmcFirst; index ++) | |
336 | emcExist[index] = 1 ; | |
337 | ||
338 | ||
339 | Bool_t * tpcExist = 0; | |
340 | Int_t nTracks = fESD->GetNumberOfTracks(); | |
341 | if(nTracks>0) | |
342 | tpcExist = new Bool_t[nTracks] ; | |
343 | ||
344 | for(index = 0; index <nTracks; index ++) | |
345 | tpcExist[index] = 1 ; | |
346 | ||
347 | ||
348 | // Finds the smallest links and makes pairs of CPV and EMC clusters with smallest distance | |
349 | TIter nextUp(fLinkUpArray) ; | |
350 | ||
351 | AliPHOSLink * linkUp ; | |
352 | ||
353 | AliPHOSCpvRecPoint * nullpointer = 0 ; | |
354 | ||
355 | while ( (linkUp = static_cast<AliPHOSLink *>(nextUp()) ) ){ | |
356 | ||
357 | if(emcExist[linkUp->GetEmc()-fEmcFirst] != -1){ | |
358 | ||
359 | if(tpcExist[linkUp->GetCpv()]){ //Track still exist | |
360 | Float_t dx,dz ; | |
361 | linkUp->GetXZ(dx,dz) ; | |
362 | new ((* fTrackSegments)[fNTrackSegments]) | |
363 | AliPHOSTrackSegment(static_cast<AliPHOSEmcRecPoint *>(fEMCRecPoints->At(linkUp->GetEmc())) , | |
364 | nullpointer, | |
365 | linkUp->GetTrack(),dx,dz) ; | |
366 | (static_cast<AliPHOSTrackSegment *>(fTrackSegments->At(fNTrackSegments)))->SetIndexInList(fNTrackSegments); | |
367 | fNTrackSegments++ ; | |
368 | emcExist[linkUp->GetEmc()-fEmcFirst] = -1 ; //Mark emc that Cpv was found | |
369 | //mark track as already used | |
370 | tpcExist[linkUp->GetCpv()] = kFALSE ; | |
371 | } //if CpvUp still exist | |
372 | } | |
373 | } | |
374 | ||
375 | //look through emc recPoints left without CPV | |
376 | if(emcExist){ //if there is emc rec point | |
377 | Int_t iEmcRP ; | |
378 | for(iEmcRP = 0; iEmcRP < fEmcLast-fEmcFirst ; iEmcRP++ ){ | |
379 | if(emcExist[iEmcRP] > 0 ){ | |
380 | new ((*fTrackSegments)[fNTrackSegments]) | |
381 | AliPHOSTrackSegment(static_cast<AliPHOSEmcRecPoint *>(fEMCRecPoints->At(iEmcRP+fEmcFirst)), | |
382 | nullpointer) ; | |
383 | (static_cast<AliPHOSTrackSegment *>(fTrackSegments->At(fNTrackSegments)))->SetIndexInList(fNTrackSegments); | |
384 | fNTrackSegments++; | |
385 | } | |
386 | } | |
387 | } | |
388 | delete [] emcExist ; | |
389 | delete [] tpcExist ; | |
390 | } | |
391 | ||
392 | //____________________________________________________________________________ | |
393 | void AliPHOSTrackSegmentMakerv2::Clusters2TrackSegments(Option_t *option) | |
394 | { | |
395 | // Steering method to perform track segment construction for events | |
396 | // in the range from fFirstEvent to fLastEvent. | |
397 | // This range is optionally set by SetEventRange(). | |
398 | // if fLastEvent=-1 (by default), then process events until the end. | |
399 | ||
400 | if(strstr(option,"tim")) | |
401 | gBenchmark->Start("PHOSTSMaker"); | |
402 | ||
403 | if(strstr(option,"print")) { | |
404 | Print() ; | |
405 | return ; | |
406 | } | |
407 | ||
408 | //Make some initializations | |
409 | fNTrackSegments = 0 ; | |
410 | fEmcFirst = 0 ; | |
411 | fEmcLast = 0 ; | |
412 | ||
413 | fTrackSegments->Clear(); | |
414 | ||
415 | // if(!ReadRecPoints(ievent)) continue; //reads RecPoints for event ievent | |
416 | ||
417 | for(fModule = 1; fModule <= fGeom->GetNModules() ; fModule++ ) { | |
418 | FillOneModule() ; | |
419 | MakeLinks() ; | |
420 | MakePairs() ; | |
421 | } | |
422 | ||
423 | if(strstr(option,"deb")) | |
424 | PrintTrackSegments(option); | |
425 | ||
426 | if(strstr(option,"tim")){ | |
427 | gBenchmark->Stop("PHOSTSMaker"); | |
428 | Info("Exec", "took %f seconds for making TS", | |
429 | gBenchmark->GetCpuTime("PHOSTSMaker")); | |
430 | } | |
431 | } | |
432 | ||
433 | //____________________________________________________________________________ | |
434 | void AliPHOSTrackSegmentMakerv2::Print(const Option_t *)const | |
435 | { | |
436 | // Print TrackSegmentMaker parameters | |
437 | ||
438 | TString message("") ; | |
439 | if( strcmp(GetName(), "") != 0 ) { | |
440 | message = "\n======== AliPHOSTrackSegmentMakerv2 ========\n" ; | |
441 | message += "Making Track segments\n" ; | |
442 | message += "with parameters:\n" ; | |
443 | message += " Maximal EMC - TPC distance (cm) %f\n" ; | |
444 | message += "============================================\n" ; | |
445 | Info("Print", message.Data(),fRtpc) ; | |
446 | } | |
447 | else | |
448 | Info("Print", "AliPHOSTrackSegmentMakerv2 not initialized ") ; | |
449 | ||
450 | } | |
451 | ||
452 | //____________________________________________________________________________ | |
453 | void AliPHOSTrackSegmentMakerv2::PrintTrackSegments(Option_t * option) | |
454 | { | |
455 | // option deb - prints # of found TrackSegments | |
456 | // option deb all - prints as well indexed of found RecParticles assigned to the TS | |
457 | ||
458 | Info("PrintTrackSegments", "Results from TrackSegmentMaker:") ; | |
459 | printf(" Found %d TrackSegments\n", fTrackSegments->GetEntriesFast() ); | |
460 | ||
461 | if(strstr(option,"all")) { // printing found TS | |
462 | printf("TrackSegment # EMC RP# CPV RP#\n") ; | |
463 | Int_t index; | |
464 | for (index = 0 ; index <fTrackSegments->GetEntriesFast() ; index++) { | |
465 | AliPHOSTrackSegment * ts = (AliPHOSTrackSegment * )fTrackSegments->At(index) ; | |
466 | printf(" %d %d %d \n", ts->GetIndexInList(), ts->GetEmcIndex(), ts->GetTrackIndex() ) ; | |
467 | } | |
468 | } | |
469 | } |