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[u/mrichter/AliRoot.git] / PHOS / AliPHOSClusterizerv1.cxx
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d15a28e7 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
b2a60966 16/* $Id$ */
17
9a1398dd 18//*-- Author: Yves Schutz (SUBATECH) & Dmitri Peressounko (SUBATECH & Kurchatov Institute)
d15a28e7 19//////////////////////////////////////////////////////////////////////////////
9a1398dd 20// Clusterization class. Performs clusterization (collects neighbouring active cells) and
a4e98857 21// unfolds the clusters having several local maxima.
22// Results are stored in TreeR#, branches PHOSEmcRP (EMC recPoints),
9a1398dd 23// PHOSCpvRP (CPV RecPoints) and AliPHOSClusterizer (Clusterizer with all
f035f6ce 24// parameters including input digits branch title, thresholds etc.)
a4e98857 25// This TTask is normally called from Reconstructioner, but can as well be used in
26// standalone mode.
27// Use Case:
fc12304f 28// root [0] AliPHOSClusterizerv1 * cl = new AliPHOSClusterizerv1("galice.root", "recpointsname", "digitsname")
a4e98857 29// Warning in <TDatabasePDG::TDatabasePDG>: object already instantiated
fc12304f 30// // reads gAlice from header file "galice.root", uses digits stored in the branch names "digitsname" (default = "Default")
31// // and saves recpoints in branch named "recpointsname" (default = "digitsname")
a4e98857 32// root [1] cl->ExecuteTask()
9a1398dd 33// //finds RecPoints in all events stored in galice.root
a4e98857 34// root [2] cl->SetDigitsBranch("digits2")
f035f6ce 35// //sets another title for Digitis (input) branch
a4e98857 36// root [3] cl->SetRecPointsBranch("recp2")
f035f6ce 37// //sets another title four output branches
a4e98857 38// root [4] cl->SetEmcLocalMaxCut(0.03)
9a1398dd 39// //set clusterization parameters
a4e98857 40// root [5] cl->ExecuteTask("deb all time")
9a1398dd 41// //once more finds RecPoints options are
42// // deb - print number of found rec points
43// // deb all - print number of found RecPoints and some their characteristics
44// // time - print benchmarking results
ed4205d8 45
d15a28e7 46// --- ROOT system ---
47
48#include "TMath.h"
9a1398dd 49#include "TMinuit.h"
50#include "TTree.h"
9a1398dd 51#include "TBenchmark.h"
d15a28e7 52
53// --- Standard library ---
54
d15a28e7 55// --- AliRoot header files ---
88cb7938 56#include "AliPHOSGetter.h"
e957fea8 57#include "AliPHOSGeometry.h"
d15a28e7 58#include "AliPHOSClusterizerv1.h"
88cb7938 59#include "AliPHOSEmcRecPoint.h"
9a1398dd 60#include "AliPHOSCpvRecPoint.h"
d15a28e7 61#include "AliPHOSDigit.h"
9a1398dd 62#include "AliPHOSDigitizer.h"
d15a28e7 63
64ClassImp(AliPHOSClusterizerv1)
f035f6ce 65
d15a28e7 66//____________________________________________________________________________
7b7c1533 67 AliPHOSClusterizerv1::AliPHOSClusterizerv1() : AliPHOSClusterizer()
d15a28e7 68{
f035f6ce 69 // default ctor (to be used mainly by Streamer)
f035f6ce 70
8d0f3f77 71 InitParameters() ;
92f521a9 72 fDefaultInit = kTRUE ;
9a1398dd 73}
7b7c1533 74
9a1398dd 75//____________________________________________________________________________
88cb7938 76AliPHOSClusterizerv1::AliPHOSClusterizerv1(const TString alirunFileName, const TString eventFolderName)
77:AliPHOSClusterizer(alirunFileName, eventFolderName)
9a1398dd 78{
a4e98857 79 // ctor with the indication of the file where header Tree and digits Tree are stored
9a1398dd 80
8d0f3f77 81 InitParameters() ;
2bd5457f 82 Init() ;
92f521a9 83 fDefaultInit = kFALSE ;
9a1398dd 84}
fc12304f 85
9688c1dd 86//____________________________________________________________________________
87 AliPHOSClusterizerv1::~AliPHOSClusterizerv1()
88{
0bc3b8ed 89 // dtor
90
88cb7938 91 // delete fPedestals ;
92// delete fGains ;
9688c1dd 93}
fc12304f 94
88cb7938 95
fc12304f 96//____________________________________________________________________________
97const TString AliPHOSClusterizerv1::BranchName() const
98{
88cb7938 99 return GetName();
fc12304f 100}
101
9a1398dd 102//____________________________________________________________________________
3758d9fc 103Float_t AliPHOSClusterizerv1::Calibrate(Int_t amp, Int_t absId) const
88cb7938 104{
105 //To be replaced later by the method, reading individual parameters from the database
106 // if(fCalibrationDB)
107 // return fCalibrationDB->Calibrate(amp,absId) ;
108 // else{ //simulation
109 if(absId <= fEmcCrystals) //calibrate as EMC
110 return fADCpedestalEmc + amp*fADCchanelEmc ;
111 else //calibrate as CPV
112 return fADCpedestalCpv+ amp*fADCchanelCpv ;
113 // }
3758d9fc 114}
548f0134 115
3758d9fc 116//____________________________________________________________________________
eabde521 117void AliPHOSClusterizerv1::Exec(Option_t *option)
a4e98857 118{
eabde521 119 // Steering method to perform clusterization for events
120 // in the range from fFirstEvent to fLastEvent.
121 // This range is optionally set by SetEventRange().
122 // if fLastEvent=-1 (by default), then process events until the end.
9a1398dd 123
124 if(strstr(option,"tim"))
7d493c2c 125 gBenchmark->Start("PHOSClusterizer");
9a1398dd 126
eabde521 127 if(strstr(option,"print")) {
88cb7938 128 Print() ;
eabde521 129 return ;
130 }
bed9e3fb 131
fb43ada4 132 AliPHOSGetter * gime = AliPHOSGetter::Instance(GetTitle()) ;
88cb7938 133
9cae45af 134 if (fLastEvent == -1)
135 fLastEvent = gime->MaxEvent() - 1 ;
136 else
fb43ada4 137 fLastEvent = TMath::Min(fFirstEvent, gime->MaxEvent()); // one event at the time
eabde521 138 Int_t nEvents = fLastEvent - fFirstEvent + 1;
fbf811ec 139
9cae45af 140 Int_t ievent ;
9cae45af 141 for (ievent = fFirstEvent; ievent <= fLastEvent; ievent++) {
88cb7938 142 gime->Event(ievent, "D");
143
144 GetCalibrationParameters() ;
bed9e3fb 145
548f0134 146 fNumberOfEmcClusters = fNumberOfCpvClusters = 0 ;
9a1398dd 147
88cb7938 148 MakeClusters() ;
149
fc12304f 150 if(fToUnfold)
151 MakeUnfolding() ;
7b7c1533 152
88cb7938 153 WriteRecPoints();
7b7c1533 154
94de8339 155 if(strstr(option,"deb"))
156 PrintRecPoints(option) ;
157
88cb7938 158 //increment the total number of recpoints per run
fbf811ec 159 fRecPointsInRun += gime->EmcRecPoints()->GetEntriesFast() ;
160 fRecPointsInRun += gime->CpvRecPoints()->GetEntriesFast() ;
88cb7938 161 }
162
163 Unload();
9a1398dd 164
165 if(strstr(option,"tim")){
166 gBenchmark->Stop("PHOSClusterizer");
21cd0c07 167 Info("Exec", " took %f seconds for Clusterizing %f seconds per event \n",
168 gBenchmark->GetCpuTime("PHOSClusterizer"),
eabde521 169 gBenchmark->GetCpuTime("PHOSClusterizer")/nEvents ) ;
88cb7938 170 }
9a1398dd 171}
172
173//____________________________________________________________________________
a0636361 174Bool_t AliPHOSClusterizerv1::FindFit(AliPHOSEmcRecPoint * emcRP, AliPHOSDigit ** maxAt, Float_t * maxAtEnergy,
d1de15f5 175 Int_t nPar, Float_t * fitparameters) const
9a1398dd 176{
177 // Calls TMinuit to fit the energy distribution of a cluster with several maxima
a4e98857 178 // The initial values for fitting procedure are set equal to the positions of local maxima.
f035f6ce 179 // Cluster will be fitted as a superposition of nPar/3 electromagnetic showers
9a1398dd 180
88cb7938 181
182 AliPHOSGetter * gime = AliPHOSGetter::Instance();
183 TClonesArray * digits = gime->Digits();
7b7c1533 184
185
9a1398dd 186 gMinuit->mncler(); // Reset Minuit's list of paramters
187 gMinuit->SetPrintLevel(-1) ; // No Printout
188 gMinuit->SetFCN(AliPHOSClusterizerv1::UnfoldingChiSquare) ;
189 // To set the address of the minimization function
190
191 TList * toMinuit = new TList();
192 toMinuit->AddAt(emcRP,0) ;
7b7c1533 193 toMinuit->AddAt(digits,1) ;
9a1398dd 194
195 gMinuit->SetObjectFit(toMinuit) ; // To tranfer pointer to UnfoldingChiSquare
196
197 // filling initial values for fit parameters
198 AliPHOSDigit * digit ;
199
200 Int_t ierflg = 0;
201 Int_t index = 0 ;
202 Int_t nDigits = (Int_t) nPar / 3 ;
203
204 Int_t iDigit ;
205
7b7c1533 206 const AliPHOSGeometry * geom = gime->PHOSGeometry() ;
9a1398dd 207
208 for(iDigit = 0; iDigit < nDigits; iDigit++){
a0636361 209 digit = maxAt[iDigit];
9a1398dd 210
211 Int_t relid[4] ;
7b7c1533 212 Float_t x = 0.;
213 Float_t z = 0.;
214 geom->AbsToRelNumbering(digit->GetId(), relid) ;
215 geom->RelPosInModule(relid, x, z) ;
9a1398dd 216
217 Float_t energy = maxAtEnergy[iDigit] ;
218
219 gMinuit->mnparm(index, "x", x, 0.1, 0, 0, ierflg) ;
220 index++ ;
221 if(ierflg != 0){
21cd0c07 222 Warning("FindFit", "PHOS Unfolding unable to set initial value for fit procedure : x = %f\n", x ) ;
9a1398dd 223 return kFALSE;
224 }
225 gMinuit->mnparm(index, "z", z, 0.1, 0, 0, ierflg) ;
226 index++ ;
227 if(ierflg != 0){
21cd0c07 228 Warning("FindFit", "PHOS Unfolding unable to set initial value for fit procedure : z =%f\n", z ) ;
9a1398dd 229 return kFALSE;
230 }
231 gMinuit->mnparm(index, "Energy", energy , 0.05*energy, 0., 4.*energy, ierflg) ;
232 index++ ;
233 if(ierflg != 0){
21cd0c07 234 Warning("FindFit", "PHOS Unfolding unable to set initial value for fit procedure : energy = %f\n", energy ) ;
9a1398dd 235 return kFALSE;
236 }
237 }
238
239 Double_t p0 = 0.1 ; // "Tolerance" Evaluation stops when EDM = 0.0001*p0 ; The number of function call slightly
240 // depends on it.
241 Double_t p1 = 1.0 ;
242 Double_t p2 = 0.0 ;
243
244 gMinuit->mnexcm("SET STR", &p2, 0, ierflg) ; // force TMinuit to reduce function calls
245 gMinuit->mnexcm("SET GRA", &p1, 1, ierflg) ; // force TMinuit to use my gradient
246 gMinuit->SetMaxIterations(5);
247 gMinuit->mnexcm("SET NOW", &p2 , 0, ierflg) ; // No Warnings
248
249 gMinuit->mnexcm("MIGRAD", &p0, 0, ierflg) ; // minimize
250
251 if(ierflg == 4){ // Minimum not found
21cd0c07 252 Warning("FindFit", "PHOS Unfolding fit not converged, cluster abandoned\n" );
9a1398dd 253 return kFALSE ;
254 }
255 for(index = 0; index < nPar; index++){
256 Double_t err ;
257 Double_t val ;
258 gMinuit->GetParameter(index, val, err) ; // Returns value and error of parameter index
259 fitparameters[index] = val ;
260 }
261
262 delete toMinuit ;
263 return kTRUE;
c3c187e5 264
d15a28e7 265}
266
3758d9fc 267//____________________________________________________________________________
268void AliPHOSClusterizerv1::GetCalibrationParameters()
269{
fbf811ec 270
88cb7938 271 AliPHOSGetter * gime = AliPHOSGetter::Instance();
c2cd5471 272
88cb7938 273 if ( !gime->Digitizer() )
274 gime->LoadDigitizer();
275 AliPHOSDigitizer * dig = gime->Digitizer();
276
277 fADCchanelEmc = dig->GetEMCchannel() ;
278 fADCpedestalEmc = dig->GetEMCpedestal();
279
280 fADCchanelCpv = dig->GetCPVchannel() ;
281 fADCpedestalCpv = dig->GetCPVpedestal() ;
282
283 // fCalibrationDB = gime->CalibrationDB();
3758d9fc 284}
548f0134 285
d15a28e7 286//____________________________________________________________________________
a4e98857 287void AliPHOSClusterizerv1::Init()
288{
2bd5457f 289 // Make all memory allocations which can not be done in default constructor.
290 // Attach the Clusterizer task to the list of PHOS tasks
88cb7938 291
292 AliPHOSGetter* gime = AliPHOSGetter::Instance(GetTitle(), fEventFolderName.Data());
fbf811ec 293
88cb7938 294 AliPHOSGeometry * geom = gime->PHOSGeometry();
295
3758d9fc 296 fEmcCrystals = geom->GetNModules() * geom->GetNCristalsInModule() ;
297
7b7c1533 298 if(!gMinuit)
88cb7938 299 gMinuit = new TMinuit(100);
fbf811ec 300
88cb7938 301 if ( !gime->Clusterizer() )
302 gime->PostClusterizer(this);
9a1398dd 303}
7b7c1533 304
8d0f3f77 305//____________________________________________________________________________
306void AliPHOSClusterizerv1::InitParameters()
307{
308
309 fNumberOfCpvClusters = 0 ;
310 fNumberOfEmcClusters = 0 ;
311
312 fCpvClusteringThreshold = 0.0;
313 fEmcClusteringThreshold = 0.2;
314
315 fEmcLocMaxCut = 0.03 ;
316 fCpvLocMaxCut = 0.03 ;
317
318 fW0 = 4.5 ;
319 fW0CPV = 4.0 ;
320
321 fEmcTimeGate = 1.e-8 ;
322
323 fToUnfold = kTRUE ;
88cb7938 324
8d0f3f77 325 fRecPointsInRun = 0 ;
c2cd5471 326
eabde521 327 SetEventRange(0,-1) ;
8d0f3f77 328}
329
9a1398dd 330//____________________________________________________________________________
331Int_t AliPHOSClusterizerv1::AreNeighbours(AliPHOSDigit * d1, AliPHOSDigit * d2)const
d15a28e7 332{
b2a60966 333 // Gives the neighbourness of two digits = 0 are not neighbour but continue searching
334 // = 1 are neighbour
335 // = 2 are not neighbour but do not continue searching
a4e98857 336 // neighbours are defined as digits having at least a common vertex
b2a60966 337 // The order of d1 and d2 is important: first (d1) should be a digit already in a cluster
338 // which is compared to a digit (d2) not yet in a cluster
339
88cb7938 340 AliPHOSGeometry * geom = AliPHOSGetter::Instance()->PHOSGeometry() ;
7b7c1533 341
d15a28e7 342 Int_t rv = 0 ;
343
d15a28e7 344 Int_t relid1[4] ;
7b7c1533 345 geom->AbsToRelNumbering(d1->GetId(), relid1) ;
d15a28e7 346
347 Int_t relid2[4] ;
7b7c1533 348 geom->AbsToRelNumbering(d2->GetId(), relid2) ;
d15a28e7 349
9688c1dd 350 if ( (relid1[0] == relid2[0]) && (relid1[1]==relid2[1]) ) { // inside the same PHOS module
92862013 351 Int_t rowdiff = TMath::Abs( relid1[2] - relid2[2] ) ;
352 Int_t coldiff = TMath::Abs( relid1[3] - relid2[3] ) ;
d15a28e7 353
92862013 354 if (( coldiff <= 1 ) && ( rowdiff <= 1 )){
9688c1dd 355 if((relid1[1] != 0) || (TMath::Abs(d1->GetTime() - d2->GetTime() ) < fEmcTimeGate))
d15a28e7 356 rv = 1 ;
357 }
358 else {
359 if((relid2[2] > relid1[2]) && (relid2[3] > relid1[3]+1))
88cb7938 360 rv = 2; // Difference in row numbers is too large to look further
d15a28e7 361 }
362
363 }
364 else {
365
9688c1dd 366 if( (relid1[0] < relid2[0]) || (relid1[1] != relid2[1]) )
d15a28e7 367 rv=2 ;
368
369 }
d72dfbc3 370
d15a28e7 371 return rv ;
372}
373
d15a28e7 374
375//____________________________________________________________________________
9a1398dd 376Bool_t AliPHOSClusterizerv1::IsInEmc(AliPHOSDigit * digit) const
d15a28e7 377{
b2a60966 378 // Tells if (true) or not (false) the digit is in a PHOS-EMC module
379
9f616d61 380 Bool_t rv = kFALSE ;
88cb7938 381 AliPHOSGeometry * geom = AliPHOSGetter::Instance()->PHOSGeometry() ;
d15a28e7 382
2b629790 383 Int_t nEMC = geom->GetNModules()*geom->GetNPhi()*geom->GetNZ();
d15a28e7 384
2b629790 385 if(digit->GetId() <= nEMC ) rv = kTRUE;
ed4205d8 386
387 return rv ;
388}
389
ed4205d8 390//____________________________________________________________________________
9a1398dd 391Bool_t AliPHOSClusterizerv1::IsInCpv(AliPHOSDigit * digit) const
ed4205d8 392{
fad3e5b9 393 // Tells if (true) or not (false) the digit is in a PHOS-CPV module
ed4205d8 394
395 Bool_t rv = kFALSE ;
88cb7938 396
397 AliPHOSGeometry * geom = AliPHOSGetter::Instance()->PHOSGeometry() ;
ed4205d8 398
2b629790 399 Int_t nEMC = geom->GetNModules()*geom->GetNPhi()*geom->GetNZ();
ed4205d8 400
2b629790 401 if(digit->GetId() > nEMC ) rv = kTRUE;
d15a28e7 402
403 return rv ;
404}
9a1398dd 405
406//____________________________________________________________________________
88cb7938 407void AliPHOSClusterizerv1::Unload()
408{
409 AliPHOSGetter * gime = AliPHOSGetter::Instance() ;
410 gime->PhosLoader()->UnloadDigits() ;
411 gime->PhosLoader()->UnloadRecPoints() ;
412}
413
414//____________________________________________________________________________
415void AliPHOSClusterizerv1::WriteRecPoints()
a4e98857 416{
7b7c1533 417
418 // Creates new branches with given title
a4e98857 419 // fills and writes into TreeR.
88cb7938 420
421 AliPHOSGetter * gime = AliPHOSGetter::Instance();
422
fbf811ec 423 TObjArray * emcRecPoints = gime->EmcRecPoints() ;
424 TObjArray * cpvRecPoints = gime->CpvRecPoints() ;
425 TClonesArray * digits = gime->Digits() ;
fbf811ec 426
88cb7938 427 TTree * treeR = gime->TreeR();
fbf811ec 428
9a1398dd 429 Int_t index ;
01a599c9 430 //Evaluate position, dispersion and other RecPoint properties...
88cb7938 431 for(index = 0; index < emcRecPoints->GetEntries(); index++)
432 dynamic_cast<AliPHOSEmcRecPoint *>( emcRecPoints->At(index) )->EvalAll(fW0,digits) ;
433
7b7c1533 434 emcRecPoints->Sort() ;
7b7c1533 435 for(index = 0; index < emcRecPoints->GetEntries(); index++)
88cb7938 436 dynamic_cast<AliPHOSEmcRecPoint *>( emcRecPoints->At(index) )->SetIndexInList(index) ;
fbf811ec 437
7b7c1533 438 emcRecPoints->Expand(emcRecPoints->GetEntriesFast()) ;
fbf811ec 439
9a1398dd 440 //Now the same for CPV
7b7c1533 441 for(index = 0; index < cpvRecPoints->GetEntries(); index++)
395f4eea 442 dynamic_cast<AliPHOSCpvRecPoint *>( cpvRecPoints->At(index) )->EvalAll(fW0CPV,digits) ;
fbf811ec 443
7b7c1533 444 cpvRecPoints->Sort() ;
fbf811ec 445
7b7c1533 446 for(index = 0; index < cpvRecPoints->GetEntries(); index++)
88cb7938 447 dynamic_cast<AliPHOSRecPoint *>( cpvRecPoints->At(index) )->SetIndexInList(index) ;
fbf811ec 448
7b7c1533 449 cpvRecPoints->Expand(cpvRecPoints->GetEntriesFast()) ;
9a1398dd 450
9a1398dd 451 Int_t bufferSize = 32000 ;
452 Int_t splitlevel = 0 ;
8d0f3f77 453
01a599c9 454 //First EMC
8d0f3f77 455 TBranch * emcBranch = treeR->Branch("PHOSEmcRP","TObjArray",&emcRecPoints,bufferSize,splitlevel);
fc12304f 456 emcBranch->SetTitle(BranchName());
9a1398dd 457
458 //Now CPV branch
8d0f3f77 459 TBranch * cpvBranch = treeR->Branch("PHOSCpvRP","TObjArray",&cpvRecPoints,bufferSize,splitlevel);
fc12304f 460 cpvBranch->SetTitle(BranchName());
9a1398dd 461
01a599c9 462 emcBranch ->Fill() ;
463 cpvBranch ->Fill() ;
88cb7938 464
465 gime->WriteRecPoints("OVERWRITE");
466 gime->WriteClusterizer("OVERWRITE");
9a1398dd 467}
468
469//____________________________________________________________________________
470void AliPHOSClusterizerv1::MakeClusters()
471{
472 // Steering method to construct the clusters stored in a list of Reconstructed Points
473 // A cluster is defined as a list of neighbour digits
d15a28e7 474
88cb7938 475
476 AliPHOSGetter * gime = AliPHOSGetter::Instance();
477
478 TObjArray * emcRecPoints = gime->EmcRecPoints() ;
479 TObjArray * cpvRecPoints = gime->CpvRecPoints() ;
7b7c1533 480
7d493c2c 481 emcRecPoints->Delete() ;
482 cpvRecPoints->Delete() ;
7b7c1533 483
fbf811ec 484 TClonesArray * digits = gime->Digits() ;
88cb7938 485
486 TClonesArray * digitsC = static_cast<TClonesArray*>( digits->Clone() ) ;
7b7c1533 487
488
d15a28e7 489 // Clusterization starts
9a1398dd 490
7b7c1533 491 TIter nextdigit(digitsC) ;
d15a28e7 492 AliPHOSDigit * digit ;
92862013 493 Bool_t notremoved = kTRUE ;
6ad0bfa0 494
88cb7938 495 while ( (digit = dynamic_cast<AliPHOSDigit *>( nextdigit()) ) ) { // scan over the list of digitsC
496
497
9a1398dd 498 AliPHOSRecPoint * clu = 0 ;
c161df70 499
d1de15f5 500 TArrayI clusterdigitslist(1500) ;
d15a28e7 501 Int_t index ;
f2bc1b87 502
3758d9fc 503 if (( IsInEmc (digit) && Calibrate(digit->GetAmp(),digit->GetId()) > fEmcClusteringThreshold ) ||
504 ( IsInCpv (digit) && Calibrate(digit->GetAmp(),digit->GetId()) > fCpvClusteringThreshold ) ) {
d15a28e7 505 Int_t iDigitInCluster = 0 ;
7b7c1533 506
6ad0bfa0 507 if ( IsInEmc(digit) ) {
88cb7938 508 // start a new EMC RecPoint
509 if(fNumberOfEmcClusters >= emcRecPoints->GetSize())
510 emcRecPoints->Expand(2*fNumberOfEmcClusters+1) ;
511
512 emcRecPoints->AddAt(new AliPHOSEmcRecPoint(""), fNumberOfEmcClusters) ;
513 clu = dynamic_cast<AliPHOSEmcRecPoint *>( emcRecPoints->At(fNumberOfEmcClusters) ) ;
514 fNumberOfEmcClusters++ ;
515 clu->AddDigit(*digit, Calibrate(digit->GetAmp(),digit->GetId())) ;
516 clusterdigitslist[iDigitInCluster] = digit->GetIndexInList() ;
517 iDigitInCluster++ ;
518 digitsC->Remove(digit) ;
ca77b032 519
d72dfbc3 520 } else {
88cb7938 521
522 // start a new CPV cluster
523 if(fNumberOfCpvClusters >= cpvRecPoints->GetSize())
524 cpvRecPoints->Expand(2*fNumberOfCpvClusters+1);
525
526 cpvRecPoints->AddAt(new AliPHOSCpvRecPoint(""), fNumberOfCpvClusters) ;
527
528 clu = dynamic_cast<AliPHOSCpvRecPoint *>( cpvRecPoints->At(fNumberOfCpvClusters) ) ;
529 fNumberOfCpvClusters++ ;
530 clu->AddDigit(*digit, Calibrate(digit->GetAmp(),digit->GetId()) ) ;
531 clusterdigitslist[iDigitInCluster] = digit->GetIndexInList() ;
532 iDigitInCluster++ ;
533 digitsC->Remove(digit) ;
d15a28e7 534 nextdigit.Reset() ;
88cb7938 535
536 // Here we remove remaining EMC digits, which cannot make a cluster
537
92862013 538 if( notremoved ) {
88cb7938 539 while( ( digit = dynamic_cast<AliPHOSDigit *>( nextdigit() ) ) ) {
9f616d61 540 if( IsInEmc(digit) )
88cb7938 541 digitsC->Remove(digit) ;
d15a28e7 542 else
88cb7938 543 break ;
544 }
545 notremoved = kFALSE ;
546 }
547
d15a28e7 548 } // else
549
550 nextdigit.Reset() ;
fad3e5b9 551
d15a28e7 552 AliPHOSDigit * digitN ;
553 index = 0 ;
9f616d61 554 while (index < iDigitInCluster){ // scan over digits already in cluster
88cb7938 555 digit = dynamic_cast<AliPHOSDigit*>( digits->At(clusterdigitslist[index]) ) ;
556 index++ ;
557 while ( (digitN = dynamic_cast<AliPHOSDigit *>( nextdigit() ) ) ) { // scan over the reduced list of digits
558 Int_t ineb = AreNeighbours(digit, digitN); // call (digit,digitN) in THAT oder !!!!!
d15a28e7 559 switch (ineb ) {
9f616d61 560 case 0 : // not a neighbour
88cb7938 561 break ;
562 case 1 : // are neighbours
563 clu->AddDigit(*digitN, Calibrate( digitN->GetAmp(), digitN->GetId() ) ) ;
564 clusterdigitslist[iDigitInCluster] = digitN->GetIndexInList() ;
565 iDigitInCluster++ ;
566 digitsC->Remove(digitN) ;
567 break ;
9f616d61 568 case 2 : // too far from each other
88cb7938 569 goto endofloop;
570 } // switch
571
572 } // while digitN
573
d15a28e7 574 endofloop: ;
88cb7938 575 nextdigit.Reset() ;
576
d15a28e7 577 } // loop over cluster
ad8cfaf4 578
ad8cfaf4 579 } // energy theshold
ad8cfaf4 580
31aa6d6c 581
d15a28e7 582 } // while digit
583
7b7c1533 584 delete digitsC ;
9688c1dd 585
9a1398dd 586}
587
588//____________________________________________________________________________
a4e98857 589void AliPHOSClusterizerv1::MakeUnfolding()
590{
591 // Unfolds clusters using the shape of an ElectroMagnetic shower
9688c1dd 592 // Performs unfolding of all EMC/CPV clusters
9a1398dd 593
88cb7938 594 AliPHOSGetter * gime = AliPHOSGetter::Instance();
fc12304f 595
7b7c1533 596 const AliPHOSGeometry * geom = gime->PHOSGeometry() ;
88cb7938 597
598 TObjArray * emcRecPoints = gime->EmcRecPoints() ;
599 TObjArray * cpvRecPoints = gime->CpvRecPoints() ;
fbf811ec 600 TClonesArray * digits = gime->Digits() ;
7b7c1533 601
a4e98857 602 // Unfold first EMC clusters
9a1398dd 603 if(fNumberOfEmcClusters > 0){
604
7b7c1533 605 Int_t nModulesToUnfold = geom->GetNModules() ;
9a1398dd 606
607 Int_t numberofNotUnfolded = fNumberOfEmcClusters ;
608 Int_t index ;
609 for(index = 0 ; index < numberofNotUnfolded ; index++){
610
88cb7938 611 AliPHOSEmcRecPoint * emcRecPoint = dynamic_cast<AliPHOSEmcRecPoint *>( emcRecPoints->At(index) ) ;
9a1398dd 612 if(emcRecPoint->GetPHOSMod()> nModulesToUnfold)
88cb7938 613 break ;
9a1398dd 614
615 Int_t nMultipl = emcRecPoint->GetMultiplicity() ;
a0636361 616 AliPHOSDigit ** maxAt = new AliPHOSDigit*[nMultipl] ;
9a1398dd 617 Float_t * maxAtEnergy = new Float_t[nMultipl] ;
7b7c1533 618 Int_t nMax = emcRecPoint->GetNumberOfLocalMax(maxAt, maxAtEnergy,fEmcLocMaxCut,digits) ;
9a1398dd 619
620 if( nMax > 1 ) { // if cluster is very flat (no pronounced maximum) then nMax = 0
88cb7938 621 UnfoldCluster(emcRecPoint, nMax, maxAt, maxAtEnergy) ;
622 emcRecPoints->Remove(emcRecPoint);
623 emcRecPoints->Compress() ;
624 index-- ;
625 fNumberOfEmcClusters -- ;
626 numberofNotUnfolded-- ;
9a1398dd 627 }
628
629 delete[] maxAt ;
630 delete[] maxAtEnergy ;
631 }
632 }
a4e98857 633 // Unfolding of EMC clusters finished
9a1398dd 634
635
a4e98857 636 // Unfold now CPV clusters
9a1398dd 637 if(fNumberOfCpvClusters > 0){
638
9688c1dd 639 Int_t nModulesToUnfold = geom->GetNModules() ;
9a1398dd 640
641 Int_t numberofCpvNotUnfolded = fNumberOfCpvClusters ;
642 Int_t index ;
643 for(index = 0 ; index < numberofCpvNotUnfolded ; index++){
644
88cb7938 645 AliPHOSRecPoint * recPoint = dynamic_cast<AliPHOSRecPoint *>( cpvRecPoints->At(index) ) ;
9a1398dd 646
647 if(recPoint->GetPHOSMod()> nModulesToUnfold)
88cb7938 648 break ;
9a1398dd 649
88cb7938 650 AliPHOSEmcRecPoint * emcRecPoint = dynamic_cast<AliPHOSEmcRecPoint*>(recPoint) ;
9a1398dd 651
652 Int_t nMultipl = emcRecPoint->GetMultiplicity() ;
a0636361 653 AliPHOSDigit ** maxAt = new AliPHOSDigit*[nMultipl] ;
9a1398dd 654 Float_t * maxAtEnergy = new Float_t[nMultipl] ;
7b7c1533 655 Int_t nMax = emcRecPoint->GetNumberOfLocalMax(maxAt, maxAtEnergy,fCpvLocMaxCut,digits) ;
9a1398dd 656
657 if( nMax > 1 ) { // if cluster is very flat (no pronounced maximum) then nMax = 0
88cb7938 658 UnfoldCluster(emcRecPoint, nMax, maxAt, maxAtEnergy) ;
659 cpvRecPoints->Remove(emcRecPoint);
660 cpvRecPoints->Compress() ;
661 index-- ;
662 numberofCpvNotUnfolded-- ;
663 fNumberOfCpvClusters-- ;
9a1398dd 664 }
665
666 delete[] maxAt ;
667 delete[] maxAtEnergy ;
668 }
669 }
670 //Unfolding of Cpv clusters finished
671
672}
673
9a1398dd 674//____________________________________________________________________________
675Double_t AliPHOSClusterizerv1::ShowerShape(Double_t r)
676{
677 // Shape of the shower (see PHOS TDR)
a4e98857 678 // If you change this function, change also the gradient evaluation in ChiSquare()
9a1398dd 679
680 Double_t r4 = r*r*r*r ;
681 Double_t r295 = TMath::Power(r, 2.95) ;
682 Double_t shape = TMath::Exp( -r4 * (1. / (2.32 + 0.26 * r4) + 0.0316 / (1 + 0.0652 * r295) ) ) ;
683 return shape ;
684}
685
686//____________________________________________________________________________
687void AliPHOSClusterizerv1::UnfoldCluster(AliPHOSEmcRecPoint * iniEmc,
88cb7938 688 Int_t nMax,
689 AliPHOSDigit ** maxAt,
690 Float_t * maxAtEnergy)
9a1398dd 691{
692 // Performs the unfolding of a cluster with nMax overlapping showers
693
88cb7938 694 AliPHOSGetter * gime = AliPHOSGetter::Instance();
fc12304f 695
7b7c1533 696 const AliPHOSGeometry * geom = gime->PHOSGeometry() ;
88cb7938 697
fbf811ec 698 const TClonesArray * digits = gime->Digits() ;
699 TObjArray * emcRecPoints = gime->EmcRecPoints() ;
700 TObjArray * cpvRecPoints = gime->CpvRecPoints() ;
7b7c1533 701
9a1398dd 702 Int_t nPar = 3 * nMax ;
703 Float_t * fitparameters = new Float_t[nPar] ;
704
705 Bool_t rv = FindFit(iniEmc, maxAt, maxAtEnergy, nPar, fitparameters) ;
706 if( !rv ) {
88cb7938 707 // Fit failed, return and remove cluster
9a1398dd 708 delete[] fitparameters ;
709 return ;
710 }
711
712 // create ufolded rec points and fill them with new energy lists
713 // First calculate energy deposited in each sell in accordance with fit (without fluctuations): efit[]
714 // and later correct this number in acordance with actual energy deposition
715
716 Int_t nDigits = iniEmc->GetMultiplicity() ;
717 Float_t * efit = new Float_t[nDigits] ;
7b7c1533 718 Float_t xDigit=0.,zDigit=0.,distance=0. ;
719 Float_t xpar=0.,zpar=0.,epar=0. ;
9a1398dd 720 Int_t relid[4] ;
7b7c1533 721 AliPHOSDigit * digit = 0 ;
9a1398dd 722 Int_t * emcDigits = iniEmc->GetDigitsList() ;
723
724 Int_t iparam ;
725 Int_t iDigit ;
726 for(iDigit = 0 ; iDigit < nDigits ; iDigit ++){
88cb7938 727 digit = dynamic_cast<AliPHOSDigit*>( digits->At(emcDigits[iDigit] ) ) ;
7b7c1533 728 geom->AbsToRelNumbering(digit->GetId(), relid) ;
729 geom->RelPosInModule(relid, xDigit, zDigit) ;
9a1398dd 730 efit[iDigit] = 0;
731
732 iparam = 0 ;
733 while(iparam < nPar ){
734 xpar = fitparameters[iparam] ;
735 zpar = fitparameters[iparam+1] ;
736 epar = fitparameters[iparam+2] ;
737 iparam += 3 ;
738 distance = (xDigit - xpar) * (xDigit - xpar) + (zDigit - zpar) * (zDigit - zpar) ;
739 distance = TMath::Sqrt(distance) ;
740 efit[iDigit] += epar * ShowerShape(distance) ;
741 }
742 }
743
744
745 // Now create new RecPoints and fill energy lists with efit corrected to fluctuations
746 // so that energy deposited in each cell is distributed betwin new clusters proportionally
747 // to its contribution to efit
748
749 Float_t * emcEnergies = iniEmc->GetEnergiesList() ;
750 Float_t ratio ;
751
752 iparam = 0 ;
753 while(iparam < nPar ){
754 xpar = fitparameters[iparam] ;
755 zpar = fitparameters[iparam+1] ;
756 epar = fitparameters[iparam+2] ;
757 iparam += 3 ;
758
7b7c1533 759 AliPHOSEmcRecPoint * emcRP = 0 ;
9a1398dd 760
761 if(iniEmc->IsEmc()){ //create new entries in fEmcRecPoints...
762
7b7c1533 763 if(fNumberOfEmcClusters >= emcRecPoints->GetSize())
88cb7938 764 emcRecPoints->Expand(2*fNumberOfEmcClusters) ;
9a1398dd 765
73a68ccb 766 (*emcRecPoints)[fNumberOfEmcClusters] = new AliPHOSEmcRecPoint("") ;
88cb7938 767 emcRP = dynamic_cast<AliPHOSEmcRecPoint *>( emcRecPoints->At(fNumberOfEmcClusters) ) ;
9a1398dd 768 fNumberOfEmcClusters++ ;
769 }
770 else{//create new entries in fCpvRecPoints
7b7c1533 771 if(fNumberOfCpvClusters >= cpvRecPoints->GetSize())
88cb7938 772 cpvRecPoints->Expand(2*fNumberOfCpvClusters) ;
9a1398dd 773
73a68ccb 774 (*cpvRecPoints)[fNumberOfCpvClusters] = new AliPHOSCpvRecPoint("") ;
88cb7938 775 emcRP = dynamic_cast<AliPHOSEmcRecPoint *>( cpvRecPoints->At(fNumberOfCpvClusters) ) ;
9a1398dd 776 fNumberOfCpvClusters++ ;
777 }
778
779 Float_t eDigit ;
780 for(iDigit = 0 ; iDigit < nDigits ; iDigit ++){
88cb7938 781 digit = dynamic_cast<AliPHOSDigit*>( digits->At( emcDigits[iDigit] ) ) ;
7b7c1533 782 geom->AbsToRelNumbering(digit->GetId(), relid) ;
783 geom->RelPosInModule(relid, xDigit, zDigit) ;
9a1398dd 784 distance = (xDigit - xpar) * (xDigit - xpar) + (zDigit - zpar) * (zDigit - zpar) ;
785 distance = TMath::Sqrt(distance) ;
786 ratio = epar * ShowerShape(distance) / efit[iDigit] ;
787 eDigit = emcEnergies[iDigit] * ratio ;
788 emcRP->AddDigit( *digit, eDigit ) ;
88cb7938 789 }
9a1398dd 790 }
791
792 delete[] fitparameters ;
793 delete[] efit ;
794
795}
796
797//_____________________________________________________________________________
798void AliPHOSClusterizerv1::UnfoldingChiSquare(Int_t & nPar, Double_t * Grad, Double_t & fret, Double_t * x, Int_t iflag)
799{
a4e98857 800 // Calculates the Chi square for the cluster unfolding minimization
9a1398dd 801 // Number of parameters, Gradient, Chi squared, parameters, what to do
802
88cb7938 803 TList * toMinuit = dynamic_cast<TList*>( gMinuit->GetObjectFit() ) ;
9a1398dd 804
88cb7938 805 AliPHOSEmcRecPoint * emcRP = dynamic_cast<AliPHOSEmcRecPoint*>( toMinuit->At(0) ) ;
806 TClonesArray * digits = dynamic_cast<TClonesArray*>( toMinuit->At(1) ) ;
9a1398dd 807
808
809
88cb7938 810 // AliPHOSEmcRecPoint * emcRP = dynamic_cast<AliPHOSEmcRecPoint *>( gMinuit->GetObjectFit() ) ; // EmcRecPoint to fit
9a1398dd 811
812 Int_t * emcDigits = emcRP->GetDigitsList() ;
813
7b7c1533 814 Int_t nOdigits = emcRP->GetDigitsMultiplicity() ;
9a1398dd 815
816 Float_t * emcEnergies = emcRP->GetEnergiesList() ;
88cb7938 817
818 const AliPHOSGeometry * geom = AliPHOSGetter::Instance()->PHOSGeometry() ;
9a1398dd 819 fret = 0. ;
820 Int_t iparam ;
821
822 if(iflag == 2)
823 for(iparam = 0 ; iparam < nPar ; iparam++)
824 Grad[iparam] = 0 ; // Will evaluate gradient
825
826 Double_t efit ;
827
828 AliPHOSDigit * digit ;
829 Int_t iDigit ;
830
7b7c1533 831 for( iDigit = 0 ; iDigit < nOdigits ; iDigit++) {
9a1398dd 832
88cb7938 833 digit = dynamic_cast<AliPHOSDigit*>( digits->At( emcDigits[iDigit] ) );
9a1398dd 834
835 Int_t relid[4] ;
836 Float_t xDigit ;
837 Float_t zDigit ;
838
839 geom->AbsToRelNumbering(digit->GetId(), relid) ;
840
841 geom->RelPosInModule(relid, xDigit, zDigit) ;
842
843 if(iflag == 2){ // calculate gradient
844 Int_t iParam = 0 ;
845 efit = 0 ;
846 while(iParam < nPar ){
88cb7938 847 Double_t distance = (xDigit - x[iParam]) * (xDigit - x[iParam]) ;
848 iParam++ ;
849 distance += (zDigit - x[iParam]) * (zDigit - x[iParam]) ;
850 distance = TMath::Sqrt( distance ) ;
851 iParam++ ;
852 efit += x[iParam] * ShowerShape(distance) ;
853 iParam++ ;
9a1398dd 854 }
88cb7938 855 Double_t sum = 2. * (efit - emcEnergies[iDigit]) / emcEnergies[iDigit] ; // Here we assume, that sigma = sqrt(E)
9a1398dd 856 iParam = 0 ;
857 while(iParam < nPar ){
88cb7938 858 Double_t xpar = x[iParam] ;
859 Double_t zpar = x[iParam+1] ;
860 Double_t epar = x[iParam+2] ;
861 Double_t dr = TMath::Sqrt( (xDigit - xpar) * (xDigit - xpar) + (zDigit - zpar) * (zDigit - zpar) );
862 Double_t shape = sum * ShowerShape(dr) ;
863 Double_t r4 = dr*dr*dr*dr ;
864 Double_t r295 = TMath::Power(dr,2.95) ;
865 Double_t deriv =-4. * dr*dr * ( 2.32 / ( (2.32 + 0.26 * r4) * (2.32 + 0.26 * r4) ) +
866 0.0316 * (1. + 0.0171 * r295) / ( ( 1. + 0.0652 * r295) * (1. + 0.0652 * r295) ) ) ;
867
868 Grad[iParam] += epar * shape * deriv * (xpar - xDigit) ; // Derivative over x
869 iParam++ ;
870 Grad[iParam] += epar * shape * deriv * (zpar - zDigit) ; // Derivative over z
871 iParam++ ;
872 Grad[iParam] += shape ; // Derivative over energy
873 iParam++ ;
9a1398dd 874 }
875 }
876 efit = 0;
877 iparam = 0 ;
878
879 while(iparam < nPar ){
880 Double_t xpar = x[iparam] ;
881 Double_t zpar = x[iparam+1] ;
882 Double_t epar = x[iparam+2] ;
883 iparam += 3 ;
884 Double_t distance = (xDigit - xpar) * (xDigit - xpar) + (zDigit - zpar) * (zDigit - zpar) ;
885 distance = TMath::Sqrt(distance) ;
886 efit += epar * ShowerShape(distance) ;
887 }
888
88cb7938 889 fret += (efit-emcEnergies[iDigit])*(efit-emcEnergies[iDigit])/emcEnergies[iDigit] ;
9a1398dd 890 // Here we assume, that sigma = sqrt(E)
891 }
83974468 892
d15a28e7 893}
894
895//____________________________________________________________________________
88cb7938 896void AliPHOSClusterizerv1::Print()const
d15a28e7 897{
d1de15f5 898 // Print clusterizer parameters
899
21cd0c07 900 TString message ;
901 TString taskName(GetName()) ;
902 taskName.ReplaceAll(Version(), "") ;
903
904 if( strcmp(GetName(), "") !=0 ) {
9a1398dd 905 // Print parameters
21cd0c07 906 message = "\n--------------- %s %s -----------\n" ;
907 message += "Clusterizing digits from the file: %s\n" ;
908 message += " Branch: %s\n" ;
909 message += " EMC Clustering threshold = %f\n" ;
910 message += " EMC Local Maximum cut = %f\n" ;
911 message += " EMC Logarothmic weight = %f\n" ;
912 message += " CPV Clustering threshold = %f\n" ;
913 message += " CPV Local Maximum cut = %f\n" ;
914 message += " CPV Logarothmic weight = %f\n" ;
9a1398dd 915 if(fToUnfold)
21cd0c07 916 message += " Unfolding on\n" ;
9a1398dd 917 else
21cd0c07 918 message += " Unfolding off\n" ;
9a1398dd 919
21cd0c07 920 message += "------------------------------------------------------------------" ;
9a1398dd 921 }
21cd0c07 922 else
923 message = " AliPHOSClusterizerv1 not initialized " ;
924
925 Info("Print", message.Data(),
926 taskName.Data(),
927 GetTitle(),
928 taskName.Data(),
929 GetName(),
930 fEmcClusteringThreshold,
931 fEmcLocMaxCut,
932 fW0,
933 fCpvClusteringThreshold,
934 fCpvLocMaxCut,
935 fW0CPV ) ;
9a1398dd 936}
21cd0c07 937
938
9a1398dd 939//____________________________________________________________________________
a4e98857 940void AliPHOSClusterizerv1::PrintRecPoints(Option_t * option)
941{
942 // Prints list of RecPoints produced at the current pass of AliPHOSClusterizer
9a1398dd 943
88cb7938 944 AliPHOSGetter * gime = AliPHOSGetter::Instance();
945
946 TObjArray * emcRecPoints = gime->EmcRecPoints() ;
947 TObjArray * cpvRecPoints = gime->CpvRecPoints() ;
7b7c1533 948
709e117a 949 printf("\nevent %d \n", gAlice->GetEvNumber()) ;
950 printf(" Found %d EMC RecPoints and %d CPV RecPoints \n",
951 emcRecPoints->GetEntriesFast(),cpvRecPoints->GetEntriesFast()) ;
88cb7938 952
953 fRecPointsInRun += emcRecPoints->GetEntriesFast() ;
954 fRecPointsInRun += cpvRecPoints->GetEntriesFast() ;
955
11f9c5ff 956
9a1398dd 957 if(strstr(option,"all")) {
709e117a 958 printf("\n EMC clusters \n") ;
959 printf("Index Ene(MeV) Multi Module X Y Z Lambdas_1 Lambda_2 # of prim Primaries list\n") ;
9a1398dd 960 Int_t index ;
7b7c1533 961 for (index = 0 ; index < emcRecPoints->GetEntries() ; index++) {
962 AliPHOSEmcRecPoint * rp = (AliPHOSEmcRecPoint * )emcRecPoints->At(index) ;
9a1398dd 963 TVector3 locpos;
964 rp->GetLocalPosition(locpos);
9a1398dd 965 Float_t lambda[2];
966 rp->GetElipsAxis(lambda);
9a1398dd 967 Int_t * primaries;
968 Int_t nprimaries;
969 primaries = rp->GetPrimaries(nprimaries);
709e117a 970 printf("\n%6d %8.2f %3d %2d %4.1f %4.1f %4.1f %4f %4f %2d : ",
11f9c5ff 971 rp->GetIndexInList(), rp->GetEnergy(), rp->GetMultiplicity(), rp->GetPHOSMod(),
972 locpos.X(), locpos.Y(), locpos.Z(), lambda[0], lambda[1], nprimaries) ;
3bf72d32 973
21cd0c07 974 for (Int_t iprimary=0; iprimary<nprimaries; iprimary++) {
709e117a 975 printf("%d ", primaries[iprimary] ) ;
21cd0c07 976 }
709e117a 977 printf("\n") ;
978 }
979
980 //Now plot CPV recPoints
981 printf("\n CPV clusters \n") ;
982 printf("Index Ene(MeV) Module X Y Z \n") ;
983 for (index = 0 ; index < cpvRecPoints->GetEntries() ; index++) {
984 AliPHOSRecPoint * rp = (AliPHOSRecPoint * )cpvRecPoints->At(index) ;
11f9c5ff 985
709e117a 986 TVector3 locpos;
987 rp->GetLocalPosition(locpos);
11f9c5ff 988
709e117a 989 printf("\n%6d %8.2f %2d %4.1f %4.1f %4.1f \n",
11f9c5ff 990 rp->GetIndexInList(), rp->GetEnergy(), rp->GetPHOSMod(),
709e117a 991 locpos.X(), locpos.Y(), locpos.Z()) ;
88cb7938 992 }
9a1398dd 993 }
d15a28e7 994}
9a1398dd 995