1 /**************************************************************************
2 * Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved. *
4 * Author: The ALICE Off-line Project. *
5 * Contributors are mentioned in the code where appropriate. *
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 **************************************************************************/
17 /* History of cvs commits:
20 * Revision 1.93 2007/10/10 09:05:10 schutz
21 * Changing name QualAss to QA
23 * Revision 1.92 2007/08/28 12:55:08 policheh
24 * Loaders removed from the reconstruction code (C.Cheshkov)
26 * Revision 1.91 2007/08/07 14:12:03 kharlov
27 * Quality assurance added (Yves Schutz)
29 * Revision 1.90 2007/07/11 13:43:30 hristov
30 * New class AliESDEvent, backward compatibility with the old AliESD (Christian)
32 * Revision 1.89 2007/07/03 08:13:04 kharlov
33 * Bug fix in CPV local coordinates
35 * Revision 1.88 2007/06/27 09:11:07 kharlov
36 * Bug fix for CPV-EMC distance
38 * Revision 1.87 2007/05/04 14:49:29 policheh
39 * AliPHOSRecPoint inheritance from AliCluster
41 * Revision 1.86 2007/04/02 15:00:16 cvetan
42 * No more calls to gAlice in the reconstruction
44 * Revision 1.85 2007/03/28 19:18:15 kharlov
45 * RecPoints recalculation in TSM removed
47 * Revision 1.84 2007/03/07 07:01:21 hristov
48 * Fixing copy/paste erro. Additional protections
50 * Revision 1.83 2007/03/06 21:07:37 kharlov
51 * DP: xz CPV-EMC distance filled to TS
53 * Revision 1.82 2007/03/06 06:54:48 kharlov
54 * DP:Calculation of cluster properties dep. on vertex added
56 * Revision 1.81 2007/02/05 10:02:40 kharlov
57 * Module numbering is corrected
59 * Revision 1.80 2006/08/28 10:01:56 kharlov
60 * Effective C++ warnings fixed (Timur Pocheptsov)
62 * Revision 1.79 2006/04/25 12:41:15 hristov
63 * Moving non-persistent data to AliESDfriend (Yu.Belikov)
65 * Revision 1.78 2005/11/18 13:04:51 hristov
68 * Revision 1.77 2005/11/17 23:34:36 hristov
71 * Revision 1.76 2005/11/17 22:29:12 hristov
72 * Faster version, no attempt to match tracks outside the PHOS acceptance
74 * Revision 1.75 2005/11/17 12:35:27 hristov
75 * Use references instead of objects. Avoid to create objects when they are not really needed
77 * Revision 1.74 2005/07/08 14:01:36 hristov
78 * Tracking in non-uniform nmagnetic field (Yu.Belikov)
80 * Revision 1.73 2005/05/28 14:19:05 schutz
81 * Compilation warnings fixed by T.P.
85 //_________________________________________________________________________
86 // Implementation version 1 of algorithm class to construct PHOS track segments
87 // Track segment for PHOS is list of
88 // EMC RecPoint + (possibly) CPV RecPoint
89 // To find TrackSegments we do the following:
90 // for each EMC RecPoints we look at
91 // CPV RecPoints in the radious fRcpv.
92 // If there is such a CPV RecPoint,
93 // we make "Link" it is just indexes of EMC and CPV RecPoint and distance
94 // between them in the PHOS plane.
95 // Then we sort "Links" and starting from the
96 // least "Link" pointing to the unassined EMC and CPV RecPoints assing them to
98 // If there is no CPV RecPoint we make TrackSegment
99 // consisting from EMC alone. There is no TrackSegments without EMC RecPoint.
100 //// In principle this class should be called from AliPHOSReconstructor, but
101 // one can use it as well in standalone mode.
103 // root [0] AliPHOSTrackSegmentMakerv1 * t = new AliPHOSTrackSegmentMaker("galice.root", "tracksegmentsname", "recpointsname")
104 // Warning in <TDatabasePDG::TDatabasePDG>: object already instantiated
105 // // reads gAlice from header file "galice.root", uses recpoints stored in the branch names "recpointsname" (default = "Default")
106 // // and saves recpoints in branch named "tracksegmentsname" (default = "recpointsname")
107 // root [1] t->ExecuteTask()
108 // root [3] t->SetTrackSegmentsBranch("max distance 5 cm")
109 // root [4] t->ExecuteTask("deb all time")
111 //*-- Author: Dmitri Peressounko (RRC Ki & SUBATECH) & Yves Schutz (SUBATECH)
114 // --- ROOT system ---
116 #include "TBenchmark.h"
118 // --- Standard library ---
119 #include "Riostream.h"
120 // --- AliRoot header files ---
121 #include "AliPHOSGeometry.h"
122 #include "AliPHOSTrackSegmentMakerv1.h"
123 #include "AliPHOSTrackSegment.h"
124 #include "AliPHOSLink.h"
125 #include "AliESDEvent.h"
126 #include "AliESDtrack.h"
127 #include "AliPHOSEmcRecPoint.h"
128 #include "AliPHOSCpvRecPoint.h"
130 ClassImp( AliPHOSTrackSegmentMakerv1)
133 //____________________________________________________________________________
134 AliPHOSTrackSegmentMakerv1::AliPHOSTrackSegmentMakerv1() :
135 AliPHOSTrackSegmentMaker(),
150 // default ctor (to be used mainly by Streamer)
154 //____________________________________________________________________________
155 AliPHOSTrackSegmentMakerv1::AliPHOSTrackSegmentMakerv1(AliPHOSGeometry *geom) :
156 AliPHOSTrackSegmentMaker(geom),
157 fDefaultInit(kFALSE),
178 AliPHOSTrackSegmentMakerv1::AliPHOSTrackSegmentMakerv1(const AliPHOSTrackSegmentMakerv1 & tsm) :
179 AliPHOSTrackSegmentMaker(tsm),
180 fDefaultInit(kFALSE),
194 // cpy ctor: no implementation yet
195 // requested by the Coding Convention
196 Fatal("cpy ctor", "not implemented") ;
200 //____________________________________________________________________________
201 AliPHOSTrackSegmentMakerv1::~AliPHOSTrackSegmentMakerv1()
204 // fDefaultInit = kTRUE if TrackSegmentMaker created by default ctor (to get just the parameters)
206 delete fLinkUpArray ;
207 if (fTrackSegments) {
208 fTrackSegments->Delete();
209 delete fTrackSegments;
213 //____________________________________________________________________________
214 void AliPHOSTrackSegmentMakerv1::FillOneModule()
216 // Finds first and last indexes between which
217 // clusters from one PHOS module are
220 Int_t totalEmc = fEMCRecPoints->GetEntriesFast() ;
221 for(fEmcFirst = fEmcLast; (fEmcLast < totalEmc) &&
222 ((dynamic_cast<AliPHOSRecPoint *>(fEMCRecPoints->At(fEmcLast)))->GetPHOSMod() == fModule );
226 Int_t totalCpv = fCPVRecPoints->GetEntriesFast() ;
228 for(fCpvFirst = fCpvLast; (fCpvLast < totalCpv) &&
229 ((dynamic_cast<AliPHOSRecPoint *>(fCPVRecPoints->At(fCpvLast)))->GetPHOSMod() == fModule );
234 //____________________________________________________________________________
235 void AliPHOSTrackSegmentMakerv1::GetDistanceInPHOSPlane(AliPHOSEmcRecPoint * emcClu,
236 AliPHOSCpvRecPoint * cpvClu,
238 Float_t &dx, Float_t &dz) const
240 // Calculates the distance between the EMC RecPoint and the CPV RecPoint
241 // Clusters are sorted in "rows" and "columns" of width 1 cm
243 // Float_t delta = 1 ; // Width of the rows in sorting of RecPoints (in cm)
244 // // if you change this value, change it as well in xxxRecPoint::Compare()
245 Float_t distance2Track = fRtpc ;
247 trackindex = -1 ; // closest track within fRCpv
249 TVector3 vecEmc ; // Local position of EMC recpoint
250 TVector3 vecP ; // Momentum direction at CPV plain
251 TVector3 vecPloc ; // Momentum direction at CPV plain
254 if(emcClu->GetPHOSMod() != cpvClu->GetPHOSMod()){
260 emcClu->GetLocalPosition(vecEmc) ;
262 Double_t xCPV,zCPV ; //EMC-projected coordinates of CPV cluster
263 TVector3 cpvGlobal; // Global position of the CPV recpoint
264 fGeom->GetGlobalPHOS((AliPHOSRecPoint*)cpvClu,cpvGlobal);
265 Double_t vtxCPV[3]={cpvGlobal.X(),cpvGlobal.Y(),cpvGlobal.Z()} ;
269 //if no track information available, assume straight line from IP to emcal
270 fGeom->ImpactOnEmc(vtxCPV,cpvGlobal.Theta(),cpvGlobal.Phi(),dummyMod,zCPV,xCPV) ;
271 dx=xCPV - vecEmc.X() ;
272 dz=zCPV - vecEmc.Z() ;
276 //if there is ESD try to correct distance using TPC information on particle direct in CPV
279 Double_t rCPV = cpvGlobal.Pt() ;// Radius from IP to current point
281 // Extrapolate the global track direction if any to CPV and find the closest track
282 Int_t nTracks = fESD->GetNumberOfTracks();
283 Int_t iClosestTrack = -1;
284 Double_t minDistance = 1.e6;
290 for (Int_t iTrack=0; iTrack<nTracks; iTrack++) {
291 track = fESD->GetTrack(iTrack);
292 if (!track->GetXYZAt(rCPV, fESD->GetMagneticField(), xyz))
293 continue; //track coord on the cylinder of PHOS radius
294 if ((TMath::Abs(xyz[0])+TMath::Abs(xyz[1])+TMath::Abs(xyz[2]))<=0)
296 //Check if this track hits PHOS
297 inPHOS.SetXYZ(xyz[0],xyz[1],xyz[2]);
298 distance2Track = inPHOS.Angle(cpvGlobal) ;
299 // Find the closest track to the CPV recpoint
300 if (distance2Track < minDistance) {
301 minDistance = distance2Track;
302 iClosestTrack = iTrack;
306 if (iClosestTrack != -1) {
307 track = fESD->GetTrack(iClosestTrack);
308 if (track->GetPxPyPzAt(rCPV, fESD->GetMagneticField(), pxyz)) { // track momentum ibid.
309 vecP.SetXYZ(pxyz[0],pxyz[1],pxyz[2]);
310 fGeom->ImpactOnEmc(vtxCPV,vecP.Theta(),vecP.Phi(),dummyMod,zCPV,xCPV) ;
314 if(minDistance < fRtpc ){
315 trackindex = iClosestTrack ;
319 // If the closest global track is found, calculate EMC-CPV distance from it
320 dx=xCPV - vecEmc.X() ;
321 dz=zCPV - vecEmc.Z() ;
324 // If no global track was found, just take the nearest CPV point
325 fGeom->ImpactOnEmc(vtxCPV,cpvGlobal.Theta(),cpvGlobal.Phi(),dummyMod,zCPV,xCPV) ;
326 dx=xCPV - vecEmc.X() ;
327 dz=zCPV - vecEmc.Z() ;
331 //____________________________________________________________________________
332 void AliPHOSTrackSegmentMakerv1::Init()
334 // Make all memory allocations that are not possible in default constructor
336 fLinkUpArray = new TClonesArray("AliPHOSLink", 1000);
337 fTrackSegments = new TClonesArray("AliPHOSTrackSegment",100);
338 fTrackSegments->SetName("TRACKS");
341 //____________________________________________________________________________
342 void AliPHOSTrackSegmentMakerv1::InitParameters()
344 //Initializes parameters
356 //____________________________________________________________________________
357 void AliPHOSTrackSegmentMakerv1::MakeLinks()const
359 // Finds distances (links) between all EMC and CPV clusters,
360 // which are not further apart from each other than fRcpv
361 // and sort them in accordance with this distance
363 fLinkUpArray->Clear() ;
365 AliPHOSCpvRecPoint * cpv ;
366 AliPHOSEmcRecPoint * emcclu ;
371 for(iEmcRP = fEmcFirst; iEmcRP < fEmcLast; iEmcRP++ ) {
372 emcclu = dynamic_cast<AliPHOSEmcRecPoint *>(fEMCRecPoints->At(iEmcRP)) ;
376 for(iCpv = fCpvFirst; iCpv < fCpvLast;iCpv++ ) {
378 cpv = dynamic_cast<AliPHOSCpvRecPoint *>(fCPVRecPoints->At(iCpv)) ;
381 GetDistanceInPHOSPlane(emcclu, cpv, track,dx,dz) ;
382 if(TMath::Sqrt(dx*dx+dz*dz) < fRcpv ){
383 new ((*fLinkUpArray)[iLinkUp++]) AliPHOSLink(dx, dz, iEmcRP, iCpv, track) ;
388 fLinkUpArray->Sort() ; //first links with smallest distances
391 //____________________________________________________________________________
392 void AliPHOSTrackSegmentMakerv1::MakePairs()
394 // Using the previously made list of "links", we found the smallest link - i.e.
395 // link with the least distance between EMC and CPV and pointing to still
396 // unassigned RecParticles. We assign these RecPoints to TrackSegment and
397 // remove them from the list of "unassigned".
399 //Make arrays to mark clusters already chosen
400 Int_t * emcExist = 0;
401 if(fEmcLast > fEmcFirst)
402 emcExist = new Int_t[fEmcLast-fEmcFirst] ;
405 for(index = 0; index <fEmcLast-fEmcFirst; index ++)
406 emcExist[index] = 1 ;
408 Bool_t * cpvExist = 0;
409 if(fCpvLast > fCpvFirst)
410 cpvExist = new Bool_t[fCpvLast-fCpvFirst] ;
411 for(index = 0; index <fCpvLast-fCpvFirst; index ++)
412 cpvExist[index] = kTRUE ;
415 // Finds the smallest links and makes pairs of CPV and EMC clusters with smallest distance
416 TIter nextUp(fLinkUpArray) ;
418 AliPHOSLink * linkUp ;
420 AliPHOSCpvRecPoint * nullpointer = 0 ;
422 while ( (linkUp = static_cast<AliPHOSLink *>(nextUp()) ) ){
424 if(emcExist[linkUp->GetEmc()-fEmcFirst] != -1){
426 if(cpvExist[linkUp->GetCpv()-fCpvFirst]){ //CPV still exist
428 linkUp->GetXZ(dx,dz) ;
429 new ((* fTrackSegments)[fNTrackSegments])
430 AliPHOSTrackSegment(dynamic_cast<AliPHOSEmcRecPoint *>(fEMCRecPoints->At(linkUp->GetEmc())) ,
431 dynamic_cast<AliPHOSCpvRecPoint *>(fCPVRecPoints->At(linkUp->GetCpv())) ,
432 linkUp->GetTrack(),dx,dz) ;
434 (dynamic_cast<AliPHOSTrackSegment *>(fTrackSegments->At(fNTrackSegments)))->SetIndexInList(fNTrackSegments);
436 emcExist[linkUp->GetEmc()-fEmcFirst] = -1 ; //Mark emc that Cpv was found
437 //mark CPV recpoint as already used
438 cpvExist[linkUp->GetCpv()-fCpvFirst] = kFALSE ;
439 } //if CpvUp still exist
443 //look through emc recPoints left without CPV
444 if(emcExist){ //if there is emc rec point
446 for(iEmcRP = 0; iEmcRP < fEmcLast-fEmcFirst ; iEmcRP++ ){
447 if(emcExist[iEmcRP] > 0 ){
448 new ((*fTrackSegments)[fNTrackSegments])
449 AliPHOSTrackSegment(dynamic_cast<AliPHOSEmcRecPoint *>(fEMCRecPoints->At(iEmcRP+fEmcFirst)),
451 (dynamic_cast<AliPHOSTrackSegment *>(fTrackSegments->At(fNTrackSegments)))->SetIndexInList(fNTrackSegments);
460 //____________________________________________________________________________
461 void AliPHOSTrackSegmentMakerv1::Clusters2TrackSegments(Option_t *option)
463 // Steering method to perform track segment construction for the current event
464 // Returns an array with the found track-segments.
466 if(strstr(option,"tim"))
467 gBenchmark->Start("PHOSTSMaker");
469 if(strstr(option,"print")) {
474 //Make some initializations
475 fNTrackSegments = 0 ;
481 fTrackSegments->Clear();
483 // if(!ReadRecPoints(ievent)) continue; //reads RecPoints for event ievent
485 for(fModule = 1; fModule <= fGeom->GetNModules() ; fModule++ ) {
491 if(strstr(option,"deb"))
492 PrintTrackSegments(option);
494 if(strstr(option,"tim")){
495 gBenchmark->Stop("PHOSTSMaker");
496 Info("Exec", "took %f seconds for making TS",
497 gBenchmark->GetCpuTime("PHOSTSMaker"));
501 //____________________________________________________________________________
502 void AliPHOSTrackSegmentMakerv1::Print(const Option_t *)const
504 // Print TrackSegmentMaker parameters
506 TString message("") ;
507 if( strcmp(GetName(), "") != 0 ) {
508 message = "\n======== AliPHOSTrackSegmentMakerv1 ========\n" ;
509 message += "Making Track segments\n" ;
510 message += "with parameters:\n" ;
511 message += " Maximal EMC - CPV distance (cm) %f\n" ;
512 message += "============================================\n" ;
513 Info("Print", message.Data(),fRcpv) ;
516 Info("Print", "AliPHOSTrackSegmentMakerv1 not initialized ") ;
519 //____________________________________________________________________________
520 void AliPHOSTrackSegmentMakerv1::PrintTrackSegments(Option_t * option)
522 // option deb - prints # of found TrackSegments
523 // option deb all - prints as well indexed of found RecParticles assigned to the TS
525 Info("PrintTrackSegments", "Results from TrackSegmentMaker:") ;
526 printf(" Found %d TrackSegments\n", fTrackSegments->GetEntriesFast() );
528 if(strstr(option,"all")) { // printing found TS
529 printf("TrackSegment # EMC RP# CPV RP#\n") ;
531 for (index = 0 ; index <fTrackSegments->GetEntriesFast() ; index++) {
532 AliPHOSTrackSegment * ts = (AliPHOSTrackSegment * )fTrackSegments->At(index) ;
533 printf(" %d %d %d \n", ts->GetIndexInList(), ts->GetEmcIndex(), ts->GetCpvIndex() ) ;