]> git.uio.no Git - u/mrichter/AliRoot.git/blame - PHOS/AliPHOSPIDv0.cxx
git://git.uio.no / u / mrichter / AliRoot.git / blame
? search:
summary | shortlog | log | commit | commitdiff | tree
blob | blame (incremental) | history | HEAD
Cosmetic changes, and a new function AliL3Hough::ProcessPatchIter.
[u/mrichter/AliRoot.git] / PHOS / AliPHOSPIDv0.cxx
CommitLineData
b91d88dc 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
16/* $Id$ */
17
18//_________________________________________________________________________
19// Implementation version v0 of the PHOS particle identifier
20// Particle identification based on the
21// - CPV information,
22// - Preshower information (in MIXT or GPS2 geometries)
23// - shower width.
24//
25// CPV or Preshower clusters should be closer in PHOS plane than fCpvEmcDistance (in cm).
26// This parameter can be set by method SetCpvtoEmcDistanceCut(Float_t cut)
27//
28// One can set desirable ID method by the function SetIdentificationMethod(option).
29// Presently the following options can be used together or separately :
30// - "disp": use dispersion cut on shower width
31// (width can be set by method SetDispersionCut(Float_t cut)
32// - "ell" : use cut on the axis of the ellipse, drawn around shower
33// (this cut can be changed by SetShowerProfileCut(char* formula),
34// where formula - any function of two variables f(lambda[0],lambda[1]).
35// Shower is considered as EM if f() > 0 )
36// One can visualize current cuts calling method PlotDispersionCuts().
37//
38// use case:
39// root [0] AliPHOSPIDv0 * p1 = new AliPHOSPIDv0("galice.root")
40// Warning in <TDatabasePDG::TDatabasePDG>: object already instantiated
41// root [1] p1->SetIdentificationMethod("disp ellipse")
42// root [2] p1->ExecuteTask()
43// root [3] AliPHOSPIDv0 * p2 = new AliPHOSPIDv0("galice1.root","ts1")
44// Warning in <TDatabasePDG::TDatabasePDG>: object already instantiated
45// // reading headers from file galice1.root and TrackSegments
46// // with title "ts1"
47// root [4] p2->SetRecParticlesBranch("rp1")
48// // set file name for the branch RecParticles
49// root [5] p2->ExecuteTask("deb all time")
50// // available options
51// // "deb" - prints # of reconstructed particles
52// // "deb all" - prints # and list of RecParticles
53// // "time" - prints benchmarking results
54//
55//*-- Author: Yves Schutz (SUBATECH) & Gines Martinez (SUBATECH) &
56// Dmitri Peressounko (SUBATECH & Kurchatov Institute)
57// Completely redesined by Dmitri Peressounko, March 2001
58
59// --- ROOT system ---
60#include "TROOT.h"
61#include "TTree.h"
62#include "TFile.h"
63#include "TF2.h"
64#include "TFormula.h"
65#include "TCanvas.h"
66#include "TFolder.h"
67#include "TSystem.h"
68#include "TBenchmark.h"
69// --- Standard library ---
70
71#include <iostream.h>
72#include <iomanip.h>
73
74// --- AliRoot header files ---
75
76#include "AliRun.h"
77#include "AliGenerator.h"
78#include "AliPHOS.h"
79#include "AliPHOSPIDv0.h"
80#include "AliPHOSClusterizerv1.h"
81#include "AliPHOSTrackSegment.h"
82#include "AliPHOSTrackSegmentMakerv1.h"
83#include "AliPHOSRecParticle.h"
84#include "AliPHOSGeometry.h"
85#include "AliPHOSGetter.h"
86
87ClassImp( AliPHOSPIDv0)
88
89//____________________________________________________________________________
90AliPHOSPIDv0::AliPHOSPIDv0():AliPHOSPID()
91{
92 // default ctor
93 fFormula = 0 ;
94 fDispersion = 0. ;
95 fCpvEmcDistance = 0 ;
96 fTimeGate = 2.e-9 ;
97 fHeaderFileName = "" ;
98 fTrackSegmentsTitle= "" ;
99 fRecPointsTitle = "" ;
100 fRecParticlesTitle = "" ;
101 fIDOptions = "dis time" ;
102 fRecParticlesInRun = 0 ;
103 fClusterizer = 0;
104 fTSMaker = 0;
105}
106
107//____________________________________________________________________________
108AliPHOSPIDv0::AliPHOSPIDv0(const char * headerFile,const char * name) : AliPHOSPID(headerFile, name)
109{
110 //ctor with the indication on where to look for the track segments
111
112 fFormula = new TFormula("LambdaCuts","(x>1)*(x<2.5)*(y>0)*(y<x)") ;
113 fDispersion = 2.0 ;
114 fCpvEmcDistance = 3.0 ;
115 fTimeGate = 2.e-9 ;
116
117 fHeaderFileName = GetTitle() ;
118 fTrackSegmentsTitle = GetName() ;
119 fRecPointsTitle = GetName() ;
120 fRecParticlesTitle = GetName() ;
121 fIDOptions = "dis time" ;
122
123 TString tempo(GetName()) ;
124 tempo.Append(":") ;
125 tempo.Append(Version()) ;
126 SetName(tempo) ;
127 fRecParticlesInRun = 0 ;
128
129 Init() ;
130
131}
132
133//____________________________________________________________________________
134AliPHOSPIDv0::~AliPHOSPIDv0()
135{
136}
137
138
139//____________________________________________________________________________
140Float_t AliPHOSPIDv0::GetDistance(AliPHOSEmcRecPoint * emc,AliPHOSRecPoint * cpv, Option_t * Axis)const
141{
142 // Calculates the distance between the EMC RecPoint and the PPSD RecPoint
143
144 const AliPHOSGeometry * geom = AliPHOSGetter::GetInstance()->PHOSGeometry() ;
145 TVector3 vecEmc ;
146 TVector3 vecCpv ;
147
148 emc->GetLocalPosition(vecEmc) ;
149 cpv->GetLocalPosition(vecCpv) ;
150 if(emc->GetPHOSMod() == cpv->GetPHOSMod()){
151
152 // Correct to difference in CPV and EMC position due to different distance to center.
153 // we assume, that particle moves from center
154 Float_t dCPV = geom->GetIPtoOuterCoverDistance();
155 Float_t dEMC = geom->GetIPtoCrystalSurface() ;
156 dEMC = dEMC / dCPV ;
157 vecCpv = dEMC * vecCpv - vecEmc ;
158 if (Axis == "X") return vecCpv.X();
159 if (Axis == "Y") return vecCpv.Y();
160 if (Axis == "Z") return vecCpv.Z();
161 if (Axis == "R") return vecCpv.Mag();
162 }
163
164 return 100000000 ;
165}
166
167//____________________________________________________________________________
168void AliPHOSPIDv0::Exec(Option_t * option)
169{
170 //Steering method
171
172 if( strcmp(GetName(), "")== 0 )
173 Init() ;
174
175 if(strstr(option,"tim"))
176 gBenchmark->Start("PHOSPID");
177
178 if(strstr(option,"print")) {
179 Print("") ;
180 return ;
181 }
182
183 gAlice->GetEvent(0) ;
184 //check, if the branch with name of this" already exits?
185 TObjArray * lob = (TObjArray*)gAlice->TreeR()->GetListOfBranches() ;
186 TIter next(lob) ;
187 TBranch * branch = 0 ;
188 Bool_t phospidfound = kFALSE, pidfound = kFALSE ;
189
190 TString taskName(GetName()) ;
191 taskName.Remove(taskName.Index(Version())-1) ;
192
193 while ( (branch = (TBranch*)next()) && (!phospidfound || !pidfound) ) {
194 if ( (strcmp(branch->GetName(), "PHOSPID")==0) && (strcmp(branch->GetTitle(), taskName.Data())==0) )
195 phospidfound = kTRUE ;
196
197 else if ( (strcmp(branch->GetName(), "AliPHOSPID")==0) && (strcmp(branch->GetTitle(), taskName.Data())==0) )
198 pidfound = kTRUE ;
199 }
200
201 if ( phospidfound || pidfound ) {
202 cerr << "WARNING: AliPHOSPIDv0::Exec -> RecParticles and/or PIDtMaker branch with name "
203 << taskName.Data() << " already exits" << endl ;
204 return ;
205 }
206
207 Int_t nevents = (Int_t) gAlice->TreeE()->GetEntries() ;
208 Int_t ievent ;
209 AliPHOSGetter * gime = AliPHOSGetter::GetInstance() ;
210
211 for(ievent = 0; ievent < nevents; ievent++){
212 gime->Event(ievent,"R") ;
213
214 MakeRecParticles() ;
215
216 WriteRecParticles(ievent);
217
218 if(strstr(option,"deb"))
219 PrintRecParticles(option) ;
220
221 //increment the total number of rec particles per run
222 fRecParticlesInRun += gime->RecParticles()->GetEntriesFast() ;
223
224 }
225
226 if(strstr(option,"tim")){
227 gBenchmark->Stop("PHOSPID");
228 cout << "AliPHOSPID:" << endl ;
229 cout << " took " << gBenchmark->GetCpuTime("PHOSPID") << " seconds for PID "
230 << gBenchmark->GetCpuTime("PHOSPID")/nevents << " seconds per event " << endl ;
231 cout << endl ;
232 }
233
234}
235//____________________________________________________________________________
236void AliPHOSPIDv0::Init()
237{
238 // Make all memory allocations that are not possible in default constructor
239 // Add the PID task to the list of PHOS tasks
240
241 if ( strcmp(GetTitle(), "") == 0 )
242 SetTitle("galice.root") ;
243
244 TString taskName(GetName()) ;
245 taskName.Remove(taskName.Index(Version())-1) ;
246
247 AliPHOSGetter * gime = AliPHOSGetter::GetInstance(GetTitle(), taskName.Data()) ;
248 if ( gime == 0 ) {
249 cerr << "ERROR: AliPHOSPIDv0::Init -> Could not obtain the Getter object !" << endl ;
250 return ;
251 }
252
253 gime->PostPID(this) ;
254 // create a folder on the white board //YSAlice/WhiteBoard/RecParticles/PHOS/recparticlesName
255 gime->PostRecParticles(taskName.Data() ) ;
256
257}
258
259//____________________________________________________________________________
260void AliPHOSPIDv0::MakeRecParticles(){
261
262 // Makes a RecParticle out of a TrackSegment
263 TString taskName(GetName()) ;
264 taskName.Remove(taskName.Index(Version())-1) ;
265
266 AliPHOSGetter * gime = AliPHOSGetter::GetInstance() ;
267 TObjArray * emcRecPoints = gime->EmcRecPoints(taskName) ;
268 TObjArray * cpvRecPoints = gime->CpvRecPoints(taskName) ;
269 TClonesArray * trackSegments = gime->TrackSegments(taskName) ;
270 TClonesArray * recParticles = gime->RecParticles(taskName) ;
271 recParticles->Clear();
272
273 TIter next(trackSegments) ;
274 AliPHOSTrackSegment * ts ;
275 Int_t index = 0 ;
276 AliPHOSRecParticle * rp ;
277
278 Bool_t ellips = fIDOptions.Contains("ell",TString::kIgnoreCase ) ;
279 Bool_t disp = fIDOptions.Contains("dis",TString::kIgnoreCase ) ;
280 Bool_t time = fIDOptions.Contains("tim",TString::kIgnoreCase ) ;
281
282 while ( (ts = (AliPHOSTrackSegment *)next()) ) {
283
284 new( (*recParticles)[index] ) AliPHOSRecParticle() ;
285 rp = (AliPHOSRecParticle *)recParticles->At(index) ;
a278df55 286 rp->SetTrackSegment(index) ;
b91d88dc 287 rp->SetIndexInList(index) ;
288
289 AliPHOSEmcRecPoint * emc = 0 ;
290 if(ts->GetEmcIndex()>=0)
291 emc = (AliPHOSEmcRecPoint *) emcRecPoints->At(ts->GetEmcIndex()) ;
292
293 AliPHOSRecPoint * cpv = 0 ;
294 if(ts->GetCpvIndex()>=0)
295 cpv = (AliPHOSRecPoint *) cpvRecPoints->At(ts->GetCpvIndex()) ;
296
297 //set momentum and energy first
298 Float_t e = emc->GetEnergy() ;
299 TVector3 dir = GetMomentumDirection(emc,cpv) ;
300 dir.SetMag(e) ;
301
302 rp->SetMomentum(dir.X(),dir.Y(),dir.Z(),e) ;
303 rp->SetCalcMass(0);
304
305 //now set type (reconstructed) of the particle
306 Int_t showerprofile = 0; // 0 narrow and 1 wide
307
308 if(ellips){
309 Float_t lambda[2] ;
310 emc->GetElipsAxis(lambda) ;
311 if(fFormula->Eval(lambda[0],lambda[1]) <= 0 )
312 showerprofile = 1 ; // not narrow
313 }
314
315 if(disp)
316 if(emc->GetDispersion() > fDispersion )
317 showerprofile = 1 ; // not narrow
318
319 Int_t slow = 0 ;
320 if(time)
321 if(emc->GetTime() > fTimeGate )
322 slow = 0 ;
323
324 // Looking at the CPV detector
325 Int_t cpvdetector= 0 ; //1 hit and 0 no hit
326 if(cpv)
327 if(GetDistance(emc, cpv, "R") < fCpvEmcDistance)
328 cpvdetector = 1 ;
329
330 Int_t type = showerprofile + 2 * slow + 4 * cpvdetector ;
331 rp->SetType(type) ;
332 rp->SetProductionVertex(0,0,0,0);
333 rp->SetFirstMother(-1);
334 rp->SetLastMother(-1);
335 rp->SetFirstDaughter(-1);
336 rp->SetLastDaughter(-1);
337 rp->SetPolarisation(0,0,0);
338 index++ ;
339 }
340
341}
342
343//____________________________________________________________________________
344void AliPHOSPIDv0:: Print(Option_t * option) const
345{
346 // Print the parameters used for the particle type identification
347 cout << "=============== AliPHOSPID1 ================" << endl ;
348 cout << "Making PID "<< endl ;
349 cout << " Headers file: " << fHeaderFileName.Data() << endl ;
350 cout << " RecPoints branch title: " << fRecPointsTitle.Data() << endl ;
351 cout << " TrackSegments Branch title: " << fTrackSegmentsTitle.Data() << endl ;
352 cout << " RecParticles Branch title " << fRecParticlesTitle.Data() << endl;
353 cout << "with parameters: " << endl ;
354 cout << " Maximal EMC - CPV distance (cm) " << fCpvEmcDistance << endl ;
355 if(fIDOptions.Contains("dis",TString::kIgnoreCase ))
356 cout << " dispersion cut " << fDispersion << endl ;
357 if(fIDOptions.Contains("ell",TString::kIgnoreCase )){
358 cout << " Eliptic cuts function: " << endl ;
359 cout << fFormula->GetTitle() << endl ;
360 }
361 if(fIDOptions.Contains("tim",TString::kIgnoreCase ))
362 cout << " Time Gate uzed: " << fTimeGate << endl ;
363 cout << "============================================" << endl ;
364}
365
366//____________________________________________________________________________
367void AliPHOSPIDv0::SetShowerProfileCut(char * formula)
368{
369 //set shape of the cut on the axis of ellipce, drown around shouer
370 //shower considered "narrow" if Formula(lambda[0],lambda[1]) > 0.
371 if(fFormula)
372 delete fFormula;
373 fFormula = new TFormula("Lambda Cut",formula) ;
374}
375//____________________________________________________________________________
376void AliPHOSPIDv0::WriteRecParticles(Int_t event)
377{
378
379 AliPHOSGetter *gime = AliPHOSGetter::GetInstance() ;
380 TString taskName(GetName()) ;
381 taskName.Remove(taskName.Index(Version())-1) ;
382 TClonesArray * recParticles = gime->RecParticles(taskName) ;
383 recParticles->Expand(recParticles->GetEntriesFast() ) ;
384
385 //Make branch in TreeR for RecParticles
386 char * filename = 0;
387 if(gSystem->Getenv("CONFIG_SPLIT_FILE")!=0){ //generating file name
388 filename = new char[strlen(gAlice->GetBaseFile())+20] ;
389 sprintf(filename,"%s/PHOS.Reco.root",gAlice->GetBaseFile()) ;
390 }
391
392 TDirectory *cwd = gDirectory;
393
394 //First rp
395 Int_t bufferSize = 32000 ;
396 TBranch * rpBranch = gAlice->TreeR()->Branch("PHOSRP",&recParticles,bufferSize);
397 rpBranch->SetTitle(fRecParticlesTitle);
398 if (filename) {
399 rpBranch->SetFile(filename);
400 TIter next( rpBranch->GetListOfBranches());
401 TBranch * sb ;
402 while ((sb=(TBranch*)next())) {
403 sb->SetFile(filename);
404 }
405 cwd->cd();
406 }
407
408 //second, pid
409 Int_t splitlevel = 0 ;
410 AliPHOSPIDv0 * pid = this ;
411 TBranch * pidBranch = gAlice->TreeR()->Branch("AliPHOSPID","AliPHOSPIDv0",&pid,bufferSize,splitlevel);
412 pidBranch->SetTitle(fRecParticlesTitle.Data());
413 if (filename) {
414 pidBranch->SetFile(filename);
415 TIter next( pidBranch->GetListOfBranches());
416 TBranch * sb ;
417 while ((sb=(TBranch*)next())) {
418 sb->SetFile(filename);
419 }
420 cwd->cd();
421 }
422
423 rpBranch->Fill() ;
424 pidBranch->Fill() ;
425
426 gAlice->TreeR()->Write(0,kOverwrite) ;
427
428 delete [] filename ;
429}
430
431//____________________________________________________________________________
432void AliPHOSPIDv0::PlotDispersionCuts()const
433{
434 // produces a plot of the dispersion cut
435 TCanvas* lambdas = new TCanvas("lambdas","Cuts on the ellipse axis",200,10,700,500);
436
437 if(fIDOptions.Contains("ell",TString::kIgnoreCase ) ){
438 TF2 * ell = new TF2("Elliptic Cuts",fFormula->GetName(),0,3,0,3) ;
439 ell->SetMinimum(0.0000001) ;
440 ell->SetMaximum(0.001) ;
441 ell->SetLineStyle(1) ;
442 ell->SetLineWidth(2) ;
443 ell->Draw() ;
444 }
445
446 if( fIDOptions.Contains("dis",TString::kIgnoreCase ) ){
447 TF2 * dsp = new TF2("dispersion","(y<x)*(x*x+y*y < [0]*[0])",0,3,0,3) ;
448 dsp->SetParameter(0,fDispersion) ;
449 dsp->SetMinimum(0.0000001) ;
450 dsp->SetMaximum(0.001) ;
451 dsp->SetLineStyle(1) ;
452 dsp->SetLineColor(2) ;
453 dsp->SetLineWidth(2) ;
454 dsp->SetNpx(200) ;
455 dsp->SetNpy(200) ;
456 if(fIDOptions.Contains("ell",TString::kIgnoreCase ) )
457 dsp->Draw("same") ;
458 else
459 dsp->Draw() ;
460 }
461 lambdas->Update();
462}
463
464//____________________________________________________________________________
465TVector3 AliPHOSPIDv0::GetMomentumDirection(AliPHOSEmcRecPoint * emc, AliPHOSRecPoint * cpv)const
466{
467 // Calculates the momentum direction:
468 // 1. if only a EMC RecPoint, direction is given by IP and this RecPoint
469 // 2. if a EMC RecPoint and CPV RecPoint, direction is given by the line through the 2 recpoints
470 // However because of the poor position resolution of PPSD the direction is always taken as if we were
471 // in case 1.
472
473 TVector3 dir(0,0,0) ;
474
475 TVector3 emcglobalpos ;
476 TMatrix dummy ;
477
478 emc->GetGlobalPosition(emcglobalpos, dummy) ;
479
480
481 // The following commented code becomes valid once the PPSD provides
482 // a reasonable position resolution, at least as good as EMC !
483 // TVector3 ppsdlglobalpos ;
484 // TVector3 ppsduglobalpos ;
485 // if( fPpsdLowRecPoint ){ // certainly a photon that has concerted
486 // fPpsdLowRecPoint->GetGlobalPosition(ppsdlglobalpos, mdummy) ;
487 // dir = emcglobalpos - ppsdlglobalpos ;
488 // if( fPpsdUpRecPoint ){ // not looks like a charged
489 // fPpsdUpRecPoint->GetGlobalPosition(ppsduglobalpos, mdummy) ;
490 // dir = ( dir + emcglobalpos - ppsduglobalpos ) * 0.5 ;
491 // }
492 // }
493 // else { // looks like a neutral
494 // dir = emcglobalpos ;
495 // }
496
497 dir = emcglobalpos ;
498 dir.SetZ( -dir.Z() ) ; // why ?
499 dir.SetMag(1.) ;
500
501 //account correction to the position of IP
502 Float_t xo,yo,zo ; //Coordinates of the origin
503 gAlice->Generator()->GetOrigin(xo,yo,zo) ;
504 TVector3 origin(xo,yo,zo);
505 dir = dir - origin ;
506
507 return dir ;
508}
509//____________________________________________________________________________
510void AliPHOSPIDv0::PrintRecParticles(Option_t * option)
511{
512 // Print table of reconstructed particles
513
514 AliPHOSGetter *gime = AliPHOSGetter::GetInstance() ;
515
516 TString taskName(GetName()) ;
517 taskName.Remove(taskName.Index(Version())-1) ;
518 TClonesArray * recParticles = gime->RecParticles(taskName) ;
519
520 cout << "AliPHOSPIDv0: event "<<gAlice->GetEvNumber() << endl ;
521 cout << " found " << recParticles->GetEntriesFast() << " RecParticles " << endl ;
522
523 if(strstr(option,"all")) { // printing found TS
524
525 cout << " PARTICLE "
526 << " Index " << endl ;
527 // << " X "
528 // << " Y "
529 // << " Z "
530 // << " # of primaries "
531 // << " Primaries list " << endl;
532
533 Int_t index ;
534 for (index = 0 ; index < recParticles->GetEntries() ; index++) {
535 AliPHOSRecParticle * rp = (AliPHOSRecParticle * ) recParticles->At(index) ;
536
537 Text_t particle[11];
538 switch(rp->GetType()) {
539 case AliPHOSFastRecParticle::kNEUTRALEMFAST:
540 strcpy( particle, "NEUTRAL EM FAST");
541 break;
542 case AliPHOSFastRecParticle::kNEUTRALHAFAST:
543 strcpy(particle, "NEUTRAL HA FAST");
544 break;
545 case AliPHOSFastRecParticle::kNEUTRALEMSLOW:
546 strcpy(particle, "NEUTRAL EM SLOW");
547 break ;
548 case AliPHOSFastRecParticle::kNEUTRALHASLOW:
549 strcpy(particle, "NEUTRAL HA SLOW");
550 break ;
551 case AliPHOSFastRecParticle::kCHARGEDEMFAST:
552 strcpy(particle, "CHARGED EM FAST") ;
553 break ;
554 case AliPHOSFastRecParticle::kCHARGEDHAFAST:
555 strcpy(particle, "CHARGED HA FAST") ;
556 break ;
557 case AliPHOSFastRecParticle::kCHARGEDEMSLOW:
558 strcpy(particle, "CHARGEDEMSLOW") ;
559 break ;
560 case AliPHOSFastRecParticle::kCHARGEDHASLOW:
561 strcpy(particle, "CHARGED HA SLOW") ;
562 break ;
563 }
564
565 // Int_t * primaries;
566 // Int_t nprimaries;
567 // primaries = rp->GetPrimaries(nprimaries);
568
569 cout << setw(10) << particle << " "
570 << setw(5) << rp->GetIndexInList() << " " ;
571 // << setw(4) << nprimaries << " ";
572 // for (Int_t iprimary=0; iprimary<nprimaries; iprimary++)
573 // cout << setw(4) << primaries[iprimary] << " ";
574 cout << endl;
575 }
576 cout << "-------------------------------------------" << endl ;
577 }
578
579}
580
581
582