New classes added.
[u/mrichter/AliRoot.git] / PHOS / AliPHOSTrackSegmentMakerv2.cxx
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861b23c3 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 *
21 */
22
23//_________________________________________________________________________
24// Implementation version 2 of algorithm class to construct PHOS track segments
25// Track segment for PHOS is list of
26// EMC RecPoint + (possibly) projection of TPC track
27// To find TrackSegments we do the following:
28// for each EMC RecPoints we look at
29// TPC projections radius fRtpc.
30// If there is such a track
31// we make "Link" it is just indexes of EMC and TPC track and distance
32// between them in the PHOS plane.
33// Then we sort "Links" and starting from the
34// least "Link" pointing to the unassined EMC and TPC assing them to
35// new TrackSegment.
36// If there is no TPC track we make TrackSegment
37// consisting from EMC alone. There is no TrackSegments without EMC RecPoint.
38//// In principle this class should be called from AliPHOSReconstructor, but
39// one can use it as well in standalone mode.
40// Use case:
41// root [0] AliPHOSTrackSegmentMakerv2 * t = new AliPHOSTrackSegmentMaker("galice.root", "tracksegmentsname", "recpointsname")
42// Warning in <TDatabasePDG::TDatabasePDG>: object already instantiated
43// // reads gAlice from header file "galice.root", uses recpoints stored in the branch names "recpointsname" (default = "Default")
44// // and saves recpoints in branch named "tracksegmentsname" (default = "recpointsname")
45// root [1] t->ExecuteTask()
46// root [3] t->SetTrackSegmentsBranch("max distance 5 cm")
47// root [4] t->ExecuteTask("deb all time")
48//
49//*-- Author: Dmitri Peressounko (RRC Ki & SUBATECH) & Yves Schutz (SUBATECH)
50//
51
52// --- ROOT system ---
4b598bb1 53#include "TFile.h"
861b23c3 54#include "TTree.h"
55#include "TBenchmark.h"
56
57// --- Standard library ---
58#include "Riostream.h"
59// --- AliRoot header files ---
60#include "AliPHOSGeometry.h"
61#include "AliPHOSTrackSegmentMakerv2.h"
62#include "AliPHOSTrackSegment.h"
63#include "AliPHOSLink.h"
64#include "AliPHOSGetter.h"
65#include "AliESD.h"
66#include "AliESDtrack.h"
67
68ClassImp( AliPHOSTrackSegmentMakerv2)
69
70
71//____________________________________________________________________________
72AliPHOSTrackSegmentMakerv2::AliPHOSTrackSegmentMakerv2() :
73 AliPHOSTrackSegmentMaker(),
74 fDefaultInit(kTRUE),
75 fWrite(kFALSE),
76 fNTrackSegments(0),
77 fRtpc(0.f),
78 fLinkUpArray(0),
79 fEmcFirst(0),
80 fEmcLast(0),
81 fModule(0),
82 fTrackSegmentsInRun(0)
83
84{
85 // default ctor (to be used mainly by Streamer)
86 InitParameters() ;
87 for(Int_t i =0 ; i<5; i++)fTPC[i]=0 ;
88}
89
90//____________________________________________________________________________
91AliPHOSTrackSegmentMakerv2::AliPHOSTrackSegmentMakerv2(const TString & alirunFileName, const TString & eventFolderName) :
92 AliPHOSTrackSegmentMaker(alirunFileName, eventFolderName),
93 fDefaultInit(kFALSE),
94 fWrite(kFALSE),
95 fNTrackSegments(0),
96 fRtpc(0.f),
97 fLinkUpArray(0),
98 fEmcFirst(0),
99 fEmcLast(0),
100 fModule(0),
101 fTrackSegmentsInRun(0)
102{
103 // ctor
104 InitParameters() ;
105 Init() ;
106 fESD = 0;
107}
108
109//____________________________________________________________________________
110AliPHOSTrackSegmentMakerv2::AliPHOSTrackSegmentMakerv2(const AliPHOSTrackSegmentMakerv2 & tsm) :
111 AliPHOSTrackSegmentMaker(tsm),
112 fDefaultInit(kFALSE),
113 fWrite(kFALSE),
114 fNTrackSegments(0),
115 fRtpc(0.f),
116 fLinkUpArray(0),
117 fEmcFirst(0),
118 fEmcLast(0),
119 fModule(0),
120 fTrackSegmentsInRun(0)
121{
122 // cpy ctor: no implementation yet
123 // requested by the Coding Convention
124 Fatal("cpy ctor", "not implemented") ;
125}
126
127
128//____________________________________________________________________________
129 AliPHOSTrackSegmentMakerv2::~AliPHOSTrackSegmentMakerv2()
130{
131 // dtor
132 // fDefaultInit = kTRUE if TrackSegmentMaker created by default ctor (to get just the parameters)
133 if (!fDefaultInit)
134 delete fLinkUpArray ;
135 for(Int_t imod=0; imod<5; imod++){
4b598bb1 136 if(fTPC[imod]) delete fTPC[imod] ;
861b23c3 137 }
138}
139
140//____________________________________________________________________________
141const TString AliPHOSTrackSegmentMakerv2::BranchName() const
142{
143
144 return GetName() ;
145}
146
147//____________________________________________________________________________
148void AliPHOSTrackSegmentMakerv2::FillOneModule()
149{
150 // Finds first and last indexes between which
151 // clusters from one PHOS module are
152
153 AliPHOSGetter * gime = AliPHOSGetter::Instance() ;
154 const AliPHOSGeometry * geom = gime->PHOSGeometry() ;
155
156 TObjArray * emcRecPoints = gime->EmcRecPoints() ;
157
158 //First EMC clusters
159 Int_t totalEmc = emcRecPoints->GetEntriesFast() ;
160 for(fEmcFirst = fEmcLast; (fEmcLast < totalEmc) &&
161 ((dynamic_cast<AliPHOSRecPoint *>(emcRecPoints->At(fEmcLast)))->GetPHOSMod() == fModule );
162 fEmcLast ++) ;
163
164 //Now TPC tracks
4b598bb1 165 if(fESD){
166 //Do it ones, only first time
167 if(fModule==1){
168 Int_t nTracks = fESD->GetNumberOfTracks();
169 TVector3 inPHOS ;
170
171 //In this particular case we use fixed vertex position at zero
172 Double_t vtx[3]={0.,0.,0.} ;
173 AliESDtrack *track;
174 Double_t xyz[3] ;
175 Int_t nPHOSmod = geom->GetNModules() ;
176 for(Int_t imod=0 ; imod< nPHOSmod; imod++){
177 fTPC[imod]->Clear() ;
178 }
179 Double_t rEMC = geom->GetIPtoCrystalSurface() ; //Use here ideal geometry
180 for (Int_t iTrack=0; iTrack<nTracks; iTrack++) {
181 track = fESD->GetTrack(iTrack);
182 if (!track->GetXYZAt(rEMC, fESD->GetMagneticField(), xyz))
183 continue; //track coord on the cylinder of PHOS radius
184 if ((TMath::Abs(xyz[0])+TMath::Abs(xyz[1])+TMath::Abs(xyz[2]))<=0)
185 continue;
186 //Check if this track hits PHOS
187 inPHOS.SetXYZ(xyz[0],xyz[1],xyz[2]);
188 Int_t modNum ;
189 Double_t x,z ;
190 geom->ImpactOnEmc(vtx, inPHOS.Theta(), inPHOS.Phi(), modNum, x,z) ;
191 if(modNum>0 && modNum<=nPHOSmod){
192 //Mark this track as one belonging to module
193 fTPC[modNum-1]->AddLast(track) ;
194 }
195 }
861b23c3 196 }
197 }
4b598bb1 198
861b23c3 199}
200
201//____________________________________________________________________________
202void AliPHOSTrackSegmentMakerv2::GetDistanceInPHOSPlane(AliPHOSEmcRecPoint * emcClu,
203 AliESDtrack *track,
204 Float_t &dx, Float_t &dz) const
205{
206 // Calculates the distance between the EMC RecPoint and the CPV RecPoint
207 // Clusters are sorted in "rows" and "columns" of width 1 cm
208
209 const AliPHOSGeometry * geom = AliPHOSGeometry::GetInstance() ;
210 TVector3 emcGlobal; // Global position of the CPV recpoint
211 geom->GetGlobal((AliRecPoint*)emcClu,emcGlobal);
212 Double_t rEMC = emcGlobal.Pt() ;// Radius from IP to current point
4b598bb1 213
214// printf("EMC: x=%f, y=%f, z=%f \n",emcGlobal.X(),emcGlobal.Y(),emcGlobal.Z()) ;
215
861b23c3 216 Double_t xyz[3] ;
217 if (track->GetXYZAt(rEMC, fESD->GetMagneticField(), xyz)){ //calculate distance
4b598bb1 218// printf("xyz: x=%f, y=%f, z=%f \n",xyz[0],xyz[1],xyz[2]) ;
861b23c3 219 dx=TMath::Sqrt((emcGlobal.X()-xyz[0])*(emcGlobal.X()-xyz[0])+(emcGlobal.Y()-xyz[1])*(emcGlobal.Y()-xyz[1])) ;
220 dx=TMath::Sign(dx,(Float_t)(emcGlobal.X()-xyz[0])) ; //set direction
221 dz=emcGlobal.Z()-xyz[2] ;
4b598bb1 222// printf(" dx=%f, dz=%f \n",dx,dz) ;
861b23c3 223 }
224 else{
225 dx=999. ;
226 dz=999. ;
227 }
228
229 return ;
230}
231//____________________________________________________________________________
232void AliPHOSTrackSegmentMakerv2::Init()
233{
234 // Make all memory allocations that are not possible in default constructor
235
236 AliPHOSGetter* gime = AliPHOSGetter::Instance();
237 if(!gime)
238 gime = AliPHOSGetter::Instance(GetTitle(), fEventFolderName.Data());
239
240 fLinkUpArray = new TClonesArray("AliPHOSLink", 1000);
241 if ( !gime->TrackSegmentMaker() ) {
242 gime->PostTrackSegmentMaker(this);
243 }
244 AliPHOSGeometry * geom = gime->PHOSGeometry() ;
245 Int_t nMod = geom->GetNModules() ;
246 for(Int_t imod=0; imod<nMod ; imod++){
247 fTPC[imod]=new TList() ;
248 }
249}
250
251//____________________________________________________________________________
252void AliPHOSTrackSegmentMakerv2::InitParameters()
253{
254 //Initializes parameters
255 fRtpc = 4. ;
256 fEmcFirst = 0 ;
257 fEmcLast = 0 ;
258 fLinkUpArray = 0 ;
259 fWrite = kTRUE ;
260 fTrackSegmentsInRun = 0 ;
261 SetEventRange(0,-1) ;
262}
263
264
265//____________________________________________________________________________
266void AliPHOSTrackSegmentMakerv2::MakeLinks()const
267{
268 // Finds distances (links) between all EMC and CPV clusters,
269 // which are not further apart from each other than fRcpv
270 // and sort them in accordance with this distance
271
272 AliPHOSGetter * gime = AliPHOSGetter::Instance() ;
273 TObjArray * emcRecPoints = gime->EmcRecPoints() ;
274
275 fLinkUpArray->Clear() ;
276
277 AliPHOSEmcRecPoint * emcclu ;
278
279 Int_t iLinkUp = 0 ;
280
281 Int_t iEmcRP;
282 for(iEmcRP = fEmcFirst; iEmcRP < fEmcLast; iEmcRP++ ) {
283 emcclu = dynamic_cast<AliPHOSEmcRecPoint *>(emcRecPoints->At(iEmcRP)) ;
861b23c3 284 Int_t mod=emcclu->GetPHOSMod() ;
285 TIter next(fTPC[mod-1]) ;
286 AliESDtrack *track ;
287 Int_t itrack=0 ;
288 while((track= static_cast<AliESDtrack *>(next()))){
4b598bb1 289 itrack = track->GetID() ;
861b23c3 290 Float_t dx,dz ;
291 GetDistanceInPHOSPlane(emcclu, track, dx,dz) ;
292 if(TMath::Sqrt(dx*dx+dz*dz) < fRtpc ){
293 new ((*fLinkUpArray)[iLinkUp++]) AliPHOSLink(dx, dz, iEmcRP, itrack, -1) ;
294 }
295 }
296 }
297
298 fLinkUpArray->Sort() ; //first links with smallest distances
299}
300
301//____________________________________________________________________________
302void AliPHOSTrackSegmentMakerv2::MakePairs()
303{
304 // Using the previously made list of "links", we found the smallest link - i.e.
305 // link with the least distance between EMC and CPV and pointing to still
306 // unassigned RecParticles. We assign these RecPoints to TrackSegment and
307 // remove them from the list of "unassigned".
308
309 AliPHOSGetter * gime = AliPHOSGetter::Instance() ;
310
311 TObjArray * emcRecPoints = gime->EmcRecPoints() ;
312 TClonesArray * trackSegments = gime->TrackSegments();
313
314 //Make arrays to mark clusters already chosen
315 Int_t * emcExist = 0;
316 if(fEmcLast > fEmcFirst)
317 emcExist = new Int_t[fEmcLast-fEmcFirst] ;
318
319 Int_t index;
320 for(index = 0; index <fEmcLast-fEmcFirst; index ++)
321 emcExist[index] = 1 ;
322
323
324 Int_t * tpcExist = 0;
4b598bb1 325 Int_t nTracks = fTPC[fModule-1]->GetSize() ;
861b23c3 326 if(nTracks>0)
327 tpcExist = new Int_t[nTracks] ;
328
329 for(index = 0; index <nTracks; index ++)
330 tpcExist[index] = 1 ;
331
332
333 // Finds the smallest links and makes pairs of CPV and EMC clusters with smallest distance
334 TIter nextUp(fLinkUpArray) ;
335
336 AliPHOSLink * linkUp ;
337
338 AliPHOSCpvRecPoint * nullpointer = 0 ;
339
340 while ( (linkUp = static_cast<AliPHOSLink *>(nextUp()) ) ){
341
342 if(emcExist[linkUp->GetEmc()-fEmcFirst] != -1){
343
344 if(tpcExist[linkUp->GetCpv()]){ //Track still exist
345 Float_t dx,dz ;
346 linkUp->GetXZ(dx,dz) ;
347 new ((* trackSegments)[fNTrackSegments])
348 AliPHOSTrackSegment(dynamic_cast<AliPHOSEmcRecPoint *>(emcRecPoints->At(linkUp->GetEmc())) ,
349 nullpointer,
350 linkUp->GetTrack(),dx,dz) ;
861b23c3 351 (dynamic_cast<AliPHOSTrackSegment *>(trackSegments->At(fNTrackSegments)))->SetIndexInList(fNTrackSegments);
352 fNTrackSegments++ ;
353 emcExist[linkUp->GetEmc()-fEmcFirst] = -1 ; //Mark emc that Cpv was found
354 //mark track as already used
355 tpcExist[linkUp->GetCpv()] = kFALSE ;
356 } //if CpvUp still exist
357 }
358 }
359
360 //look through emc recPoints left without CPV
361 if(emcExist){ //if there is emc rec point
362 Int_t iEmcRP ;
363 for(iEmcRP = 0; iEmcRP < fEmcLast-fEmcFirst ; iEmcRP++ ){
364 if(emcExist[iEmcRP] > 0 ){
365 new ((*trackSegments)[fNTrackSegments])
366 AliPHOSTrackSegment(dynamic_cast<AliPHOSEmcRecPoint *>(emcRecPoints->At(iEmcRP+fEmcFirst)),
367 nullpointer) ;
368 (dynamic_cast<AliPHOSTrackSegment *>(trackSegments->At(fNTrackSegments)))->SetIndexInList(fNTrackSegments);
369 fNTrackSegments++;
370 }
371 }
372 }
373 delete [] emcExist ;
374 delete [] tpcExist ;
375}
376
377//____________________________________________________________________________
378void AliPHOSTrackSegmentMakerv2::Exec(Option_t *option)
379{
380 // Steering method to perform track segment construction for events
381 // in the range from fFirstEvent to fLastEvent.
382 // This range is optionally set by SetEventRange().
383 // if fLastEvent=-1 (by default), then process events until the end.
384
385 if(strstr(option,"tim"))
386 gBenchmark->Start("PHOSTSMaker");
387
388 if(strstr(option,"print")) {
389 Print() ;
390 return ;
391 }
392
393 AliPHOSGetter * gime = AliPHOSGetter::Instance() ;
394
395 const AliPHOSGeometry * geom = gime->PHOSGeometry() ;
396
397 if (fLastEvent == -1)
398 fLastEvent = gime->MaxEvent() - 1 ;
399 else
400 fLastEvent = TMath::Min(fFirstEvent,gime->MaxEvent());
401 Int_t nEvents = fLastEvent - fFirstEvent + 1;
402
403 Int_t ievent ;
404 for (ievent = fFirstEvent; ievent <= fLastEvent; ievent++) {
405 gime->Event(ievent,"DR") ;
406 //Make some initializations
407 fNTrackSegments = 0 ;
408 fEmcFirst = 0 ;
409 fEmcLast = 0 ;
410
411 gime->TrackSegments()->Clear();
412
861b23c3 413 // if(!ReadRecPoints(ievent)) continue; //reads RecPoints for event ievent
414
415 for(fModule = 1; fModule <= geom->GetNModules() ; fModule++ ) {
416 FillOneModule() ;
417 MakeLinks() ;
418 MakePairs() ;
419 }
420
421 WriteTrackSegments() ;
422
423 if(strstr(option,"deb"))
424 PrintTrackSegments(option);
425
426 //increment the total number of track segments per run
427 fTrackSegmentsInRun += gime->TrackSegments()->GetEntriesFast() ;
428 }
429
430 if(strstr(option,"tim")){
431 gBenchmark->Stop("PHOSTSMaker");
432 Info("Exec", "took %f seconds for making TS %f seconds per event",
433 gBenchmark->GetCpuTime("PHOSTSMaker"),
434 gBenchmark->GetCpuTime("PHOSTSMaker")/nEvents) ;
435 }
436 if(fWrite) //do not unload in "on flight" mode
437 Unload();
438}
439//____________________________________________________________________________
861b23c3 440void AliPHOSTrackSegmentMakerv2::Unload()
441{
442 // Unloads the task from the folder
443 AliPHOSGetter * gime = AliPHOSGetter::Instance() ;
444 gime->PhosLoader()->UnloadRecPoints() ;
445 gime->PhosLoader()->UnloadTracks() ;
446}
447
448//____________________________________________________________________________
449void AliPHOSTrackSegmentMakerv2::Print(const Option_t *)const
450{
451 // Print TrackSegmentMaker parameters
452
453 TString message("") ;
454 if( strcmp(GetName(), "") != 0 ) {
455 message = "\n======== AliPHOSTrackSegmentMakerv2 ========\n" ;
456 message += "Making Track segments\n" ;
457 message += "with parameters:\n" ;
458 message += " Maximal EMC - TPC distance (cm) %f\n" ;
459 message += "============================================\n" ;
460 Info("Print", message.Data(),fRtpc) ;
461 }
462 else
463 Info("Print", "AliPHOSTrackSegmentMakerv2 not initialized ") ;
464}
465
466//____________________________________________________________________________
467void AliPHOSTrackSegmentMakerv2::WriteTrackSegments()
468{
469 // Writes found TrackSegments to TreeR. Creates branches
470 // "PHOSTS" and "AliPHOSTrackSegmentMaker" with the same title.
471 // In the former branch found TrackSegments are stored, while
472 // in the latter all parameters, with which TS were made.
473 // ROOT does not allow overwriting existing branches, therefore
474 // first we check, if branches with the same title already exist.
475 // If yes - exits without writing.
476
477 AliPHOSGetter *gime = AliPHOSGetter::Instance() ;
478
479 TClonesArray * trackSegments = gime->TrackSegments() ;
480 trackSegments->Expand(trackSegments->GetEntriesFast()) ;
481
482 if(fWrite){ //We write TreeT
483 TTree * treeT = gime->TreeT();
484
485 //First TS
486 Int_t bufferSize = 32000 ;
487 TBranch * tsBranch = treeT->Branch("PHOSTS",&trackSegments,bufferSize);
488 tsBranch->Fill() ;
489
490 gime->WriteTracks("OVERWRITE");
491 gime->WriteTrackSegmentMaker("OVERWRITE");
492 }
493}
494
495
496//____________________________________________________________________________
497void AliPHOSTrackSegmentMakerv2::PrintTrackSegments(Option_t * option)
498{
499 // option deb - prints # of found TrackSegments
500 // option deb all - prints as well indexed of found RecParticles assigned to the TS
501
502 TClonesArray * trackSegments = AliPHOSGetter::Instance()->TrackSegments() ;
503
504 Info("PrintTrackSegments", "Results from TrackSegmentMaker:") ;
505 printf("nevent: %d\n", gAlice->GetEvNumber()) ;
506 printf(" Found %d TrackSegments\n", trackSegments->GetEntriesFast() );
507
508 if(strstr(option,"all")) { // printing found TS
509 printf("TrackSegment # EMC RP# CPV RP#\n") ;
510 Int_t index;
511 for (index = 0 ; index <trackSegments->GetEntriesFast() ; index++) {
512 AliPHOSTrackSegment * ts = (AliPHOSTrackSegment * )trackSegments->At(index) ;
513 printf(" %d %d %d \n", ts->GetIndexInList(), ts->GetEmcIndex(), ts->GetTrackIndex() ) ;
514 }
515 }
516}