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4 * Author: The ALICE Off-line Project. *
5 * Contributors are mentioned in the code where appropriate. *
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14 **************************************************************************/
16 //_________________________________________________________________________
17 // Implementation version 1 of algorithm class to construct PHOS track segments
18 // Track segment for PHOS is list of
19 // EMC RecPoint + (possibly) CPV RecPoint + (possibly) PPSD RecPoint
20 // To find TrackSegments we do the following:
21 // for each EMC RecPoints we look at
22 // CPV/PPSD RecPoints in the radious fRcpv.
23 // If there is such a CPV RecPoint,
24 // we make "Link" it is just indexes of EMC and CPV/PPSD RecPoint and distance
25 // between them in the PHOS plane.
26 // Then we sort "Links" and starting from the
27 // least "Link" pointing to the unassined EMC and CPV RecPoints assing them to
29 // If there is no CPV/PPSD RecPoint we make TrackSegment
30 // consisting from EMC alone. There is no TrackSegments without EMC RecPoint.
31 //// In principle this class should be called from AliPHOSReconstructioner, but
32 // one can use it as well in standalone mode.
34 // root [0] AliPHOSTrackSegmentMakerv1 * t = new AliPHOSTrackSegmentMaker("galice.root", "tracksegmentsname", "recpointsname")
35 // Warning in <TDatabasePDG::TDatabasePDG>: object already instantiated
36 // // reads gAlice from header file "galice.root", uses recpoints stored in the branch names "recpointsname" (default = "Default")
37 // // and saves recpoints in branch named "tracksegmentsname" (default = "recpointsname")
38 // root [1] t->ExecuteTask()
39 // root [2] t->SetMaxEmcPpsdDistance(5)
40 // root [3] t->SetTrackSegmentsBranch("max distance 5 cm")
41 // root [4] t->ExecuteTask("deb all time")
43 //*-- Author: Dmitri Peressounko (RRC Ki & SUBATECH) & Yves Schutz (SUBATECH)
46 // --- ROOT system ---
52 #include "TBenchmark.h"
54 // --- Standard library ---
56 // --- AliRoot header files ---
58 #include "AliPHOSTrackSegmentMakerv1.h"
59 #include "AliPHOSClusterizerv1.h"
60 #include "AliPHOSTrackSegment.h"
61 #include "AliPHOSCpvRecPoint.h"
62 #include "AliPHOSLink.h"
63 #include "AliPHOSGetter.h"
66 ClassImp( AliPHOSTrackSegmentMakerv1)
69 //____________________________________________________________________________
70 AliPHOSTrackSegmentMakerv1::AliPHOSTrackSegmentMakerv1() : AliPHOSTrackSegmentMaker()
72 // default ctor (to be used mainly by Streamer)
75 fDefaultInit = kTRUE ;
78 //____________________________________________________________________________
79 AliPHOSTrackSegmentMakerv1::AliPHOSTrackSegmentMakerv1(const TString alirunFileName, const TString eventFolderName)
80 :AliPHOSTrackSegmentMaker(alirunFileName, eventFolderName)
86 fDefaultInit = kFALSE ;
89 //____________________________________________________________________________
90 AliPHOSTrackSegmentMakerv1::~AliPHOSTrackSegmentMakerv1()
93 // fDefaultInit = kTRUE if TrackSegmentMaker created by default ctor (to get just the parameters)
99 //____________________________________________________________________________
100 const TString AliPHOSTrackSegmentMakerv1::BranchName() const
106 //____________________________________________________________________________
107 void AliPHOSTrackSegmentMakerv1::FillOneModule()
109 // Finds first and last indexes between which
110 // clusters from one PHOS module are
112 AliPHOSGetter * gime = AliPHOSGetter::Instance() ;
114 TObjArray * emcRecPoints = gime->EmcRecPoints() ;
115 TObjArray * cpvRecPoints = gime->CpvRecPoints() ;
118 Int_t totalEmc = emcRecPoints->GetEntriesFast() ;
119 for(fEmcFirst = fEmcLast; (fEmcLast < totalEmc) &&
120 ((dynamic_cast<AliPHOSRecPoint *>(emcRecPoints->At(fEmcLast)))->GetPHOSMod() == fModule );
124 Int_t totalCpv = cpvRecPoints->GetEntriesFast() ;
126 for(fCpvFirst = fCpvLast; (fCpvLast < totalCpv) &&
127 ((dynamic_cast<AliPHOSRecPoint *>(cpvRecPoints->At(fCpvLast)))->GetPHOSMod() == fModule );
132 //____________________________________________________________________________
133 Float_t AliPHOSTrackSegmentMakerv1::GetDistanceInPHOSPlane(AliPHOSEmcRecPoint * emcClu,AliPHOSRecPoint * cpvClu, Bool_t &toofar)const
135 // Calculates the distance between the EMC RecPoint and the PPSD RecPoint
136 // Clusters are sorted in "rows" and "columns" of width 1 cm
138 Float_t delta = 1 ; // Width of the rows in sorting of RecPoints (in cm)
139 // if you change this value, change it as well in xxxRecPoint::Compare()
145 emcClu->GetLocalPosition(vecEmc) ;
146 cpvClu->GetLocalPosition(vecCpv) ;
148 if(emcClu->GetPHOSMod() == cpvClu->GetPHOSMod()){
149 if(vecCpv.X() <= vecEmc.X() + fRcpv + 2*delta ){
151 vecCpv = vecCpv - vecEmc ;
155 } // if xPpsd >= xEmc + ...
168 //____________________________________________________________________________
169 void AliPHOSTrackSegmentMakerv1::Init()
171 // Make all memory allocations that are not possible in default constructor
173 AliPHOSGetter* gime = AliPHOSGetter::Instance(GetTitle(), fEventFolderName.Data());
175 fLinkUpArray = new TClonesArray("AliPHOSLink", 1000);
176 if ( !gime->TrackSegmentMaker() ) {
177 gime->PostTrackSegmentMaker(this);
181 //____________________________________________________________________________
182 void AliPHOSTrackSegmentMakerv1::InitParameters()
190 fTrackSegmentsInRun = 0 ;
194 //____________________________________________________________________________
195 void AliPHOSTrackSegmentMakerv1::MakeLinks()const
197 // Finds distances (links) between all EMC and PPSD clusters,
198 // which are not further apart from each other than fRcpv
199 // and sort them in accordance with this distance
201 AliPHOSGetter * gime = AliPHOSGetter::Instance() ;
202 TObjArray * emcRecPoints = gime->EmcRecPoints() ;
203 TObjArray * cpvRecPoints = gime->CpvRecPoints() ;
205 fLinkUpArray->Clear() ;
207 AliPHOSRecPoint * cpv ;
208 AliPHOSEmcRecPoint * emcclu ;
213 for(iEmcRP = fEmcFirst; iEmcRP < fEmcLast; iEmcRP++ ) {
214 emcclu = dynamic_cast<AliPHOSEmcRecPoint *>(emcRecPoints->At(iEmcRP)) ;
218 for(iCpv = fCpvFirst; iCpv < fCpvLast;iCpv++ ) {
220 cpv = dynamic_cast<AliPHOSRecPoint *>(cpvRecPoints->At(iCpv)) ;
221 Float_t r = GetDistanceInPHOSPlane(emcclu, cpv, toofar) ;
226 new ((*fLinkUpArray)[iLinkUp++]) AliPHOSLink(r, iEmcRP, iCpv) ;
231 fLinkUpArray->Sort() ; //first links with smallest distances
234 //____________________________________________________________________________
235 void AliPHOSTrackSegmentMakerv1::MakePairs()
237 // Using the previously made list of "links", we found the smallest link - i.e.
238 // link with the least distance between EMC and CPV and pointing to still
239 // unassigned RecParticles. We assign these RecPoints to TrackSegment and
240 // remove them from the list of "unassigned".
242 AliPHOSGetter * gime = AliPHOSGetter::Instance() ;
244 TObjArray * emcRecPoints = gime->EmcRecPoints() ;
245 TObjArray * cpvRecPoints = gime->CpvRecPoints() ;
246 TClonesArray * trackSegments = gime->TrackSegments();
248 //Make arrays to mark clusters already chosen
249 Int_t * emcExist = 0;
250 if(fEmcLast > fEmcFirst)
251 emcExist = new Int_t[fEmcLast-fEmcFirst] ;
254 for(index = 0; index <fEmcLast-fEmcFirst; index ++)
255 emcExist[index] = 1 ;
257 Bool_t * cpvExist = 0;
258 if(fCpvLast > fCpvFirst)
259 cpvExist = new Bool_t[fCpvLast-fCpvFirst] ;
260 for(index = 0; index <fCpvLast-fCpvFirst; index ++)
261 cpvExist[index] = kTRUE ;
264 // Finds the smallest links and makes pairs of CPV and EMC clusters with smallest distance
265 TIter nextUp(fLinkUpArray) ;
267 AliPHOSLink * linkUp ;
269 AliPHOSRecPoint * nullpointer = 0 ;
271 while ( (linkUp = static_cast<AliPHOSLink *>(nextUp()) ) ){
273 if(emcExist[linkUp->GetEmc()-fEmcFirst] != -1){ //without ppsd Up yet
275 if(cpvExist[linkUp->GetPpsd()-fCpvFirst]){ //CPV still exist
277 new ((* trackSegments)[fNTrackSegments])
278 AliPHOSTrackSegment(dynamic_cast<AliPHOSEmcRecPoint *>(emcRecPoints->At(linkUp->GetEmc())) ,
279 dynamic_cast<AliPHOSRecPoint *>(cpvRecPoints->At(linkUp->GetPpsd()))) ;
280 (dynamic_cast<AliPHOSTrackSegment *>(trackSegments->At(fNTrackSegments)))->SetIndexInList(fNTrackSegments);
283 emcExist[linkUp->GetEmc()-fEmcFirst] = -1 ; //Mark emc that Cpv was found
284 //mark CPV recpoint as already used
285 cpvExist[linkUp->GetPpsd()-fCpvFirst] = kFALSE ;
286 } //if ppsdUp still exist
290 //look through emc recPoints left without CPV/PPSD
291 if(emcExist){ //if there is emc rec point
293 for(iEmcRP = 0; iEmcRP < fEmcLast-fEmcFirst ; iEmcRP++ ){
294 if(emcExist[iEmcRP] > 0 ){
295 new ((*trackSegments)[fNTrackSegments])
296 AliPHOSTrackSegment(dynamic_cast<AliPHOSEmcRecPoint *>(emcRecPoints->At(iEmcRP+fEmcFirst)),
298 (dynamic_cast<AliPHOSTrackSegment *>(trackSegments->At(fNTrackSegments)))->SetIndexInList(fNTrackSegments);
307 //____________________________________________________________________________
308 void AliPHOSTrackSegmentMakerv1::Exec(Option_t * option)
312 if(strstr(option,"tim"))
313 gBenchmark->Start("PHOSTSMaker");
315 if(strstr(option,"print")) {
320 AliPHOSGetter * gime = AliPHOSGetter::Instance() ;
322 const AliPHOSGeometry * geom = gime->PHOSGeometry() ;
324 Int_t nevents = gime->MaxEvent() ;
327 for(ievent = 0; ievent < nevents; ievent++) {
328 gime->Event(ievent,"R") ;
329 //Make some initializations
330 fNTrackSegments = 0 ;
336 gime->TrackSegments()->Clear();
338 // if(!ReadRecPoints(ievent)) continue; //reads RecPoints for event ievent
340 for(fModule = 1; fModule <= geom->GetNModules() ; fModule++ ) {
346 WriteTrackSegments() ;
348 if(strstr(option,"deb"))
349 PrintTrackSegments(option);
351 //increment the total number of track segments per run
352 fTrackSegmentsInRun += gime->TrackSegments()->GetEntriesFast() ;
356 if(strstr(option,"tim")){
357 gBenchmark->Stop("PHOSTSMaker");
358 Info("Exec", "took %f seconds for making TS %f seconds per event",
359 gBenchmark->GetCpuTime("PHOSTSMaker"),
360 gBenchmark->GetCpuTime("PHOSTSMaker")/nevents) ;
365 //____________________________________________________________________________
366 void AliPHOSTrackSegmentMakerv1::Unload()
368 AliPHOSGetter * gime = AliPHOSGetter::Instance() ;
369 gime->PhosLoader()->UnloadRecPoints() ;
370 gime->PhosLoader()->UnloadTracks() ;
373 //____________________________________________________________________________
374 void AliPHOSTrackSegmentMakerv1::Print()const
376 // Print TrackSegmentMaker parameters
378 TString message("") ;
379 if( strcmp(GetName(), "") != 0 ) {
380 message = "\n======== AliPHOSTrackSegmentMakerv1 ========\n" ;
381 message += "Making Track segments\n" ;
382 message += "with parameters:\n" ;
383 message += " Maximal EMC - CPV (PPSD) distance (cm) %f\n" ;
384 message += "============================================\n" ;
385 Info("Print", message.Data(),fRcpv) ;
388 Info("Print", "AliPHOSTrackSegmentMakerv1 not initialized ") ;
391 //____________________________________________________________________________
392 void AliPHOSTrackSegmentMakerv1::WriteTrackSegments()
394 // Writes found TrackSegments to TreeR. Creates branches
395 // "PHOSTS" and "AliPHOSTrackSegmentMaker" with the same title.
396 // In the former branch found TrackSegments are stored, while
397 // in the latter all parameters, with which TS were made.
398 // ROOT does not allow overwriting existing branches, therefore
399 // first we check, if branches with the same title already exist.
400 // If yes - exits without writing.
402 AliPHOSGetter *gime = AliPHOSGetter::Instance() ;
404 TClonesArray * trackSegments = gime->TrackSegments() ;
405 trackSegments->Expand(trackSegments->GetEntriesFast()) ;
407 TTree * treeT = gime->TreeT();
410 Int_t bufferSize = 32000 ;
411 TBranch * tsBranch = treeT->Branch("PHOSTS",&trackSegments,bufferSize);
414 gime->WriteTracks("OVERWRITE");
415 gime->WriteTrackSegmentMaker("OVERWRITE");
419 //____________________________________________________________________________
420 void AliPHOSTrackSegmentMakerv1::PrintTrackSegments(Option_t * option)
422 // option deb - prints # of found TrackSegments
423 // option deb all - prints as well indexed of found RecParticles assigned to the TS
425 TClonesArray * trackSegments = AliPHOSGetter::Instance()->TrackSegments() ;
427 Info("PrintTrackSegments", "Results from TrackSegmentMaker:") ;
428 printf("nevent: %d\n", gAlice->GetEvNumber()) ;
429 printf(" Found %d TrackSegments\n", trackSegments->GetEntriesFast() );
431 if(strstr(option,"all")) { // printing found TS
432 printf("TrackSegment # EMC RP# CPV RP#\n") ;
434 for (index = 0 ; index <trackSegments->GetEntriesFast() ; index++) {
435 AliPHOSTrackSegment * ts = (AliPHOSTrackSegment * )trackSegments->At(index) ;
436 printf(" %d %d %d \n", ts->GetIndexInList(), ts->GetEmcIndex(), ts->GetCpvIndex() ) ;