1 /*************************************************************************
2 * Copyright(c) 1998-2009, 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 **************************************************************************/
16 ///////////////////////////////////////////////////////////////////////////
17 // Dielectron MixingHandler //
26 ///////////////////////////////////////////////////////////////////////////
33 #include <AliVTrack.h>
35 #include "AliDielectron.h"
36 #include "AliDielectronHelper.h"
37 #include "AliDielectronHistos.h"
38 #include "AliDielectronEvent.h"
40 #include "AliDielectronMixingHandler.h"
42 ClassImp(AliDielectronMixingHandler)
44 AliDielectronMixingHandler::AliDielectronMixingHandler() :
47 fArrPools("TClonesArray"),
50 fMixIncomplete(kTRUE),
51 fMoveToSameVertex(kFALSE)
54 // Default Constructor
56 for (Int_t i=0; i<kMaxCuts; ++i){
59 fAxes.SetOwner(kTRUE);
62 //______________________________________________
63 AliDielectronMixingHandler::AliDielectronMixingHandler(const char* name, const char* title) :
66 fArrPools("TClonesArray"),
69 fMixIncomplete(kTRUE),
70 fMoveToSameVertex(kFALSE)
75 for (Int_t i=0; i<kMaxCuts; ++i){
78 fAxes.SetOwner(kTRUE);
81 //______________________________________________
82 AliDielectronMixingHandler::~AliDielectronMixingHandler()
90 //________________________________________________________________
91 void AliDielectronMixingHandler::AddVariable(AliDielectronVarManager::ValueTypes type,
92 Int_t nbins, Double_t min, Double_t max, Bool_t log)
95 // Add a variable to the mixing handler
98 // limit number of variables to kMaxCuts
99 if (fAxes.GetEntriesFast()>=kMaxCuts) return;
101 TVectorD *binLimits=0x0;
102 if (!log) binLimits=AliDielectronHelper::MakeLinBinning(nbins,min,max);
103 else binLimits=AliDielectronHelper::MakeLogBinning(nbins,min,max);
104 if (!binLimits) return;
106 Int_t size=fAxes.GetEntriesFast();
107 fEventCuts[size]=(UShort_t)type;
108 fAxes.Add(binLimits);
111 //________________________________________________________________
112 void AliDielectronMixingHandler::AddVariable(AliDielectronVarManager::ValueTypes type,
113 const char* binLimitStr)
116 // Add a variable to the mixing handler with arbitrary binning
119 // limit number of variables to kMaxCuts
120 if (fAxes.GetEntriesFast()>=kMaxCuts) return;
122 TVectorD *binLimits=AliDielectronHelper::MakeArbitraryBinning(binLimitStr);
123 if (!binLimits) return;
125 Int_t size=fAxes.GetEntriesFast();
126 fEventCuts[size]=(UShort_t)type;
127 fAxes.Add(binLimits);
130 //______________________________________________
131 void AliDielectronMixingHandler::Fill(const AliVEvent *ev, AliDielectron *diele)
134 // fill event buffers and perform mixing if the pool depth is reached
137 //check if there are tracks available
138 if (diele->GetTrackArray(0)->GetEntriesFast()==0 && diele->GetTrackArray(1)->GetEntriesFast()==0) return;
141 Double_t values[AliDielectronVarManager::kNMaxValues]={0.};
142 AliDielectronVarManager::Fill(ev,values);
145 Int_t bin=FindBin(values,&dim);
147 //add mixing bin to event data
148 values[AliDielectronVarManager::kMixingBin] = bin;
151 AliDebug(5,Form("Bin outside range: %s",dim.Data()));
155 // get mixing pool, create it if it does not yet exist.
156 TClonesArray *poolp=static_cast<TClonesArray*>(fArrPools.At(bin));
158 AliDebug(10,Form("New pool at %d (%s)\n",bin,dim.Data()));
159 poolp=new(fArrPools[bin]) TClonesArray("AliDielectronEvent",fDepth);
161 TClonesArray &pool=*poolp;
163 AliDebug(10,Form("new event at %d: %d",bin,pool.GetEntriesFast()));
164 AliDielectronEvent *event=new(pool[pool.GetEntriesFast()]) AliDielectronEvent();
166 event->SetTracks(*diele->GetTrackArray(0), *diele->GetTrackArray(1), *diele->GetPairArray(1));
167 event->SetEventData(values);
169 // check if pool depth is reached.
170 if (pool.GetEntriesFast()<fDepth) return;
172 // pool depth reached, do mixing
173 DoMixing(pool,diele);
175 // increase counter for full bins
176 if (diele->fHistos) {
177 diele->fHistos->Fill("Mixing","Stats",0);
178 diele->fHistos->Fill("Mixing","CompletePools",bin);
181 //clear the current pool
185 //______________________________________________
186 void AliDielectronMixingHandler::DoMixing(TClonesArray &pool, AliDielectron *diele)
189 // perform the mixing
192 //buffer track arrays and copy them back afterwards
193 TObjArray arrTrDummy[4];
194 for (Int_t i=0; i<4; ++i) arrTrDummy[i]=diele->fTracks[i];
196 //buffer also global event data
197 Double_t values[AliDielectronVarManager::kNMaxValues]={0};
198 for (Int_t i=AliDielectronVarManager::kPairMax; i<AliDielectronVarManager::kNMaxValues; ++i)
199 values[i]=AliDielectronVarManager::GetValue((AliDielectronVarManager::ValueTypes)i);
201 for (Int_t i1=0; i1<pool.GetEntriesFast(); ++i1){
202 AliDielectronEvent *ev1=static_cast<AliDielectronEvent*>(pool.At(i1));
203 //use event data from the first event
204 //both events are in the same mixing bin anyhow...
205 AliDielectronVarManager::SetEventData(ev1->GetEventData());
208 TIter ev1P(ev1->GetTrackArrayP());
209 TIter ev1N(ev1->GetTrackArrayN());
211 for (Int_t i2=i1+1; i2<pool.GetEntriesFast(); ++i2){
213 diele->fTracks[0].Clear();
214 diele->fTracks[1].Clear();
215 diele->fTracks[2].Clear();
216 diele->fTracks[3].Clear();
219 AliDielectronEvent *ev2=static_cast<AliDielectronEvent*>(pool.At(i2));
223 TIter ev2P(ev2->GetTrackArrayP());
224 TIter ev2N(ev2->GetTrackArrayN());
227 //move tracks to the same vertex (vertex of the first event), if requested
229 if (fMoveToSameVertex){
230 const Double_t *varsFirst=ev1->GetEventData();
231 const Double_t *varsMix=ev2->GetEventData();
233 const Double_t vFirst[3]={varsFirst[AliDielectronVarManager::kXvPrim],
234 varsFirst[AliDielectronVarManager::kYvPrim],
235 varsFirst[AliDielectronVarManager::kZvPrim]};
237 const Double_t vMix[3] ={varsMix[AliDielectronVarManager::kXvPrim],
238 varsMix[AliDielectronVarManager::kYvPrim],
239 varsMix[AliDielectronVarManager::kZvPrim]};
241 //loop over all tracks from the second event and move them to the vertex of the first
242 AliVTrack *vtrack=0x0;
243 while ( ( vtrack=(AliVTrack*)ev2P() ) ){
244 MoveToSameVertex(vtrack, vFirst, vMix);
248 while ( ( vtrack=(AliVTrack*)ev2N() ) ){
249 MoveToSameVertex(vtrack, vFirst, vMix);
257 //mixing of ev1- ev2+ (pair type4). This is common for all mixing types
258 while ( (o=ev1N()) ) diele->fTracks[1].Add(o);
259 while ( (o=ev2P()) ) diele->fTracks[2].Add(o);
260 diele->FillPairArrays(1,2);
262 if (fMixType==kAll || fMixType==kOSandLS){
263 // all 4 pair arrays will be filled
264 while ( (o=ev1P()) ) diele->fTracks[0].Add(o);
265 while ( (o=ev2N()) ) diele->fTracks[3].Add(o);
266 diele->FillPairArrays(0,2);
267 diele->FillPairArrays(1,3);
268 if (fMixType==kAll) diele->FillPairArrays(0,3);
271 if (fMixType==kOSonly || fMixType==kOSandLS){
272 //use the pair type of ev1- ev1+ also for ev1+ ev1-
273 diele->fTracks[1].Clear();
274 diele->fTracks[2].Clear();
275 while ( (o=ev1P()) ) diele->fTracks[1].Add(o);
276 while ( (o=ev2N()) ) diele->fTracks[2].Add(o);
277 diele->FillPairArrays(1,2);
282 //copy back the tracks
283 for (Int_t i=0; i<4; ++i) {
284 diele->fTracks[i].Clear();
285 diele->fTracks[i]=arrTrDummy[i];
288 //set back global event values
289 AliDielectronVarManager::SetEventData(values);
292 //______________________________________________
293 void AliDielectronMixingHandler::MixRemaining(AliDielectron *diele)
296 // mix all pools even if they are incomplete
299 //Check if there was any processed data and it is requested to mix incomplete bins
300 if (!diele || !diele->PairArray(0) || !fMixIncomplete ) return;
303 for (Int_t ipool=0; ipool<fArrPools.GetSize(); ++ipool){
304 TClonesArray *poolp=static_cast<TClonesArray*>(fArrPools.At(ipool));
305 if (!poolp || !poolp->GetEntriesFast() || !poolp->At(0)) continue;
306 //clear the arrays before the final processing"
307 AliDebug(10,Form("Incomplete: Bin %d (%d)\n",ipool,poolp->GetEntriesFast()));
308 diele->ClearArrays();
309 DoMixing(*poolp,diele);
311 // increase counter for incomplete bins
312 if (diele->fHistos) {
313 //buffer event data and set event data using the first event in this pool
314 Double_t values[AliDielectronVarManager::kNMaxValues]={0};
315 for (Int_t i=AliDielectronVarManager::kPairMax; i<AliDielectronVarManager::kNMaxValues; ++i)
316 values[i]=AliDielectronVarManager::GetValue((AliDielectronVarManager::ValueTypes)i);
318 AliDielectronEvent *ev1=static_cast<AliDielectronEvent*>(poolp->At(0));
319 //use event data from the first event all events are in the same mixing bin anyhow...
320 AliDielectronVarManager::SetEventData(ev1->GetEventData());
322 // fill the histograms
323 diele->FillHistograms(0x0, kTRUE);
324 diele->fHistos->Fill("Mixing","Stats",1);
325 diele->fHistos->Fill("Mixing","InCompletePools",ipool);
326 diele->fHistos->Fill("Mixing","Entries_InCompletePools",poolp->GetEntriesFast());
328 //set back global event values
329 AliDielectronVarManager::SetEventData(values);
336 //______________________________________________
337 void AliDielectronMixingHandler::Init(const AliDielectron *diele)
340 // initialise event buffers
343 Int_t size=GetNumberOfBins();
345 AliDebug(10,Form("Creating a pool array with size %d \n",size));
347 fArrPools.Expand(size);
349 //add statics histogram if we have a histogram manager
350 if (diele && diele->fHistos) {
351 diele->fHistos->AddClass("Mixing");
352 diele->fHistos->UserHistogram("Mixing","Stats","Mixing Statistics;;#called bins",2,0,2);
353 TH1* h=diele->fHistos->GetHistogram("Mixing","Stats");
354 h->GetXaxis()->SetBinLabel(1,"Complete");
355 h->GetXaxis()->SetBinLabel(2,"Incomplete");
357 diele->fHistos->UserHistogram("Mixing","CompletePools","Mixing Statistics compete pools;bin;#fills",size,0,size);
358 diele->fHistos->UserHistogram("Mixing","InCompletePools","Mixing Statistics incomplete pools;bin;#fills",size,0,size);
359 diele->fHistos->UserHistogram("Mixing","Entries_InCompletePools","#entries in incomplete pools;entries;#fills",fDepth,0,fDepth);
363 for (Int_t i=0; i<fAxes.GetEntriesFast(); ++i){
364 TVectorD *bins=static_cast<TVectorD*>(fAxes.At(i));
365 Int_t nRows=bins->GetNrows();
366 values+=Form("%s: ",AliDielectronVarManager::GetValueName(fEventCuts[i]));
367 for (Int_t irow=0; irow<nRows; ++irow){
368 values+=Form("%.2f, ",(*bins)[irow]);
372 AliDebug(10,values.Data());
375 //______________________________________________
376 Int_t AliDielectronMixingHandler::GetNumberOfBins() const
379 // return the number of bins this mixing handler has
382 for (Int_t i=0; i<fAxes.GetEntriesFast(); ++i)
383 size*=((static_cast<TVectorD*>(fAxes.At(i)))->GetNrows()-1);
387 //______________________________________________
388 Int_t AliDielectronMixingHandler::FindBin(const Double_t values[], TString *dim)
391 // bin bin in mixing stack described by 'values'
392 // if the values are outside the binning range -1 is returned
393 // if dim is non NULL debug info will be stored in the variable
396 if (fAxes.GetEntriesFast()==0) {
397 if (dim) (*dim)="single bin";
403 for (Int_t i=0; i<fAxes.GetEntriesFast(); ++i){
404 Double_t val=values[fEventCuts[i]];
405 TVectorD *bins=static_cast<TVectorD*>(fAxes.At(i));
406 Int_t nRows=bins->GetNrows();
407 if ( (val<(*bins)[0]) || (val>(*bins)[nRows-1]) ) {
411 Int_t pos=TMath::BinarySearch(nRows,bins->GetMatrixArray(),val);
413 if (dim) (*dim)+=Form("%s: %f (%d); ",AliDielectronVarManager::GetValueName(fEventCuts[i]),val,pos);
420 //______________________________________________
421 void AliDielectronMixingHandler::MoveToSameVertex(AliVTrack * const vtrack, const Double_t *vFirst, const Double_t* vMix)
424 // move 'track' which belongs to the vertex information of vMix to the vertex of vFirst
427 static Bool_t printed=kFALSE;
429 if (vtrack->IsA()==AliESDtrack::Class()){
430 AliESDtrack *track=(AliESDtrack*)vtrack;
432 //get track information
433 Double_t x = track->GetX();
434 Double_t alpha = track->GetAlpha();
435 Double_t param[5] = {0};
436 Double_t cov[15] = {0};
438 for (Int_t i=0; i<5; ++i) param[i]=track->GetParameter()[i];
439 for (Int_t i=0; i<15; ++i) cov[i] =track->GetCovariance()[i];
442 Double_t vt[3] = {vMix[0]-vFirst[0],vMix[1]-vFirst[1],vMix[2]-vFirst[2]};
443 //rotate to the track frame
444 track->Global2LocalPosition(vt,track->GetAlpha());
446 //add to track position
448 param[0] = param[0]-vt[1];
449 param[1] = param[1]-vt[2];
451 //set updated track information
452 track->Set(x, alpha, param, cov);
454 // AliAODTrack *track=(AliAODTrack*)vtrack;
455 // Double_t pos[3]={0};
456 // track->GetPosition(pos);
457 // if (pos[0]>-999.){
458 // pos[0]=pos[0]-vMix[AliDielectronVarManager::kXvPrim]+vFirst[AliDielectronVarManager::kXvPrim];
459 // pos[1]=pos[1]-vMix[AliDielectronVarManager::kYvPrim]+vFirst[AliDielectronVarManager::kYvPrim];
460 // pos[2]=pos[2]-vMix[AliDielectronVarManager::kZvPrim]+vFirst[AliDielectronVarManager::kZvPrim];
461 // track->SetPosition(pos);
462 // AliError("Move To same vertex not yet implemented for AOD!");
464 // Error("AliDielectronMixingHandler::MoveToSameVertex","Move To same vertex not yet implemented for AOD!");
468 // Not that clear how to do it. In AOD track there is fPosition, fPositionAtDCA and "TRef fProdVertex"
469 // where Xv(), Yv(), Zv() returns the position of fProdVertex