- AliMUONRecoParam.cxx:
[u/mrichter/AliRoot.git] / MUON / AliMUONRecoCheck.cxx
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b8dc484b 1/**************************************************************************
48217459 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**************************************************************************/
b8dc484b 15
d19b6003 16/* $Id$ */
17
3d1463c8 18//-----------------------------------------------------------------------------
5398f946 19/// \class AliMUONRecoCheck
78649106 20/// Utility class to check reconstruction
5398f946 21/// Reconstructed tracks are compared to reference tracks.
22/// The reference tracks are built from AliTrackReference for the
23/// hit in chamber (0..9) and from kinematics for the vertex parameters.
3d1463c8 24//-----------------------------------------------------------------------------
b8dc484b 25
9bdda5f6 26// 13 Nov 2007:
27// Added a method to create a list of reconstructed AliMUONTrack objects from
28// ESD data. This is necessary since the track objects that are actually created
29// during offline reconstruction are no longer stored to disk.
30// - Artur Szostak <artursz@iafrica.com>
103e6575 31// 25 Jan 2008:
32// Use the new ESDInterface to create MUON objects from ESD data
33// - Philippe Pillot
9bdda5f6 34
cc056de1 35#include "AliMUONRecoCheck.h"
36#include "AliMUONTrack.h"
103e6575 37#include "AliMUONVTrackStore.h"
38#include "AliMUONVCluster.h"
39#include "AliMUONVClusterStore.h"
cc056de1 40#include "AliMUONConstants.h"
103e6575 41#include "AliMUONESDInterface.h"
96ebe67e 42#include "AliMCEventHandler.h"
43#include "AliMCEvent.h"
b8dc484b 44#include "AliStack.h"
cc056de1 45#include "AliTrackReference.h"
9bdda5f6 46#include "AliLog.h"
47#include "AliESDEvent.h"
48#include "AliESDMuonTrack.h"
96ebe67e 49
61fed964 50#include <TFile.h>
51#include <TTree.h>
cc056de1 52#include <TParticle.h>
5b1afea0 53#include <TParticlePDG.h>
96ebe67e 54#include <Riostream.h>
55
5398f946 56/// \cond CLASSIMP
b8dc484b 57ClassImp(AliMUONRecoCheck)
5398f946 58/// \endcond
b8dc484b 59
068e4c36 60//_____________________________________________________________________________
ad3c6eda 61AliMUONRecoCheck::AliMUONRecoCheck(Char_t *esdFileName, Char_t *pathSim)
48217459 62: TObject(),
96ebe67e 63fMCEventHandler(new AliMCEventHandler()),
61fed964 64fESDEvent(new AliESDEvent()),
65fESDTree (0x0),
66fESDFile (0x0),
96ebe67e 67fCurrentEvent(0),
68fTrackRefStore(0x0),
69fRecoTrackRefStore(0x0),
70fRecoTrackStore(0x0)
068e4c36 71{
48217459 72 /// Normal ctor
61fed964 73
74 // TrackRefs and Particules
96ebe67e 75 fMCEventHandler->SetInputPath(pathSim);
76 fMCEventHandler->InitIO("");
61fed964 77
78 // ESD MUON Tracks
79 fESDFile = TFile::Open(esdFileName); // open the file
80 if (!fESDFile || !fESDFile->IsOpen()) {
81 AliError(Form("opening ESD file %s failed", esdFileName));
82 fESDFile = 0x0;
83 return;
84 }
85 fESDTree = (TTree*) fESDFile->Get("esdTree"); // get the tree
86 if (!fESDTree) {
87 AliError("no ESD tree found");
88 fESDFile->Close();
89 fESDFile = 0x0;
90 return;
91 }
92 fESDEvent->ReadFromTree(fESDTree); // link fESDEvent to the tree
068e4c36 93}
94
b8dc484b 95//_____________________________________________________________________________
48217459 96AliMUONRecoCheck::~AliMUONRecoCheck()
b8dc484b 97{
48217459 98 /// Destructor
96ebe67e 99 delete fMCEventHandler;
61fed964 100 delete fESDEvent;
101 if (fESDFile) fESDFile->Close();
96ebe67e 102 ResetStores();
103}
104
105//_____________________________________________________________________________
106void AliMUONRecoCheck::ResetStores()
107{
108 /// Deletes all the store objects that have been created and resets the pointers to 0x0
109 delete fTrackRefStore; fTrackRefStore = 0x0;
110 delete fRecoTrackRefStore; fRecoTrackRefStore = 0x0;
111 delete fRecoTrackStore; fRecoTrackStore = 0x0;
112}
113
114//_____________________________________________________________________________
115Int_t AliMUONRecoCheck::NumberOfEvents() const
116{
117 /// Return the number of events
61fed964 118 if (fESDTree) return fESDTree->GetEntries();
96ebe67e 119 return 0;
b8dc484b 120}
121
48217459 122//_____________________________________________________________________________
96ebe67e 123AliMUONVTrackStore* AliMUONRecoCheck::ReconstructedTracks(Int_t event)
48217459 124{
61fed964 125 /// Return a track store containing the reconstructed tracks (converted into
126 /// MUONTrack objects) for a given event
96ebe67e 127 if (event != fCurrentEvent) {
128 ResetStores();
129 fCurrentEvent = event;
130 }
131
132 if (fRecoTrackStore != 0x0) return fRecoTrackStore;
61fed964 133 else {
134 if (!fESDTree) return 0x0;
135 if (fESDTree->GetEvent(event) <= 0) {
136 AliError(Form("fails to read ESD object for event %d", event));
137 return 0x0;
9bdda5f6 138 }
61fed964 139 MakeReconstructedTracks();
140 return fRecoTrackStore;
9bdda5f6 141 }
9bdda5f6 142}
143
144//_____________________________________________________________________________
96ebe67e 145AliMUONVTrackStore* AliMUONRecoCheck::TrackRefs(Int_t event)
b8dc484b 146{
48217459 147 /// Return a track store containing the track references (converted into
148 /// MUONTrack objects) for a given event
96ebe67e 149 if (event != fCurrentEvent) {
150 ResetStores();
151 fCurrentEvent = event;
152 }
153
154 if (fTrackRefStore != 0x0) return fTrackRefStore;
155 else {
61fed964 156 if (!fMCEventHandler->GetEvent(event)) {
157 AliError(Form("fails to read MC objects for event %d", event));
158 return 0x0;
159 }
96ebe67e 160 MakeTrackRefs();
161 return fTrackRefStore;
162 }
b8dc484b 163}
164
165//_____________________________________________________________________________
96ebe67e 166AliMUONVTrackStore* AliMUONRecoCheck::ReconstructibleTracks(Int_t event)
b8dc484b 167{
48217459 168 /// Return a track store containing the reconstructible tracks for a given event
96ebe67e 169 if (event != fCurrentEvent) {
170 ResetStores();
171 fCurrentEvent = event;
172 }
173
174 if (fRecoTrackRefStore != 0x0) return fRecoTrackRefStore;
175 else {
176 if (TrackRefs(event) == 0x0) return 0x0;
177 MakeReconstructibleTracks();
178 return fRecoTrackRefStore;
179 }
48217459 180}
b8dc484b 181
61fed964 182//_____________________________________________________________________________
183void AliMUONRecoCheck::MakeReconstructedTracks()
184{
185 /// Make reconstructed tracks
103e6575 186 if (!(fRecoTrackStore = AliMUONESDInterface::NewTrackStore())) return;
61fed964 187
b1fea02e 188 // loop over all reconstructed tracks and add them to the store (skip ghosts)
103e6575 189 Int_t nTracks = (Int_t) fESDEvent->GetNumberOfMuonTracks();
b1fea02e 190 for (Int_t iTrack = 0; iTrack < nTracks; iTrack++) {
191 AliESDMuonTrack* esdTrack = fESDEvent->GetMuonTrack(iTrack);
ad3c6eda 192 if (esdTrack->ContainTrackerData()) AliMUONESDInterface::Add(*esdTrack, *fRecoTrackStore);
b1fea02e 193 }
61fed964 194
195}
196
48217459 197//_____________________________________________________________________________
96ebe67e 198void AliMUONRecoCheck::MakeTrackRefs()
48217459 199{
200 /// Make reconstructible tracks
103e6575 201 AliMUONVTrackStore *tmpTrackRefStore = AliMUONESDInterface::NewTrackStore();
202 if (!tmpTrackRefStore) return;
48217459 203
96ebe67e 204 Double_t x, y, z, pX, pY, pZ, bendingSlope, nonBendingSlope, inverseBendingMomentum;
205 TParticle* particle;
206 TClonesArray* trackRefs;
207 Int_t nTrackRef = fMCEventHandler->MCEvent()->GetNumberOfTracks();
103e6575 208 AliMUONVClusterStore* cStore = AliMUONESDInterface::NewClusterStore();
209 if (!cStore) return;
210 AliMUONVCluster* hit = cStore->CreateCluster(0,0,0);
b8dc484b 211
96ebe67e 212 // loop over simulated tracks
213 for (Int_t iTrackRef = 0; iTrackRef < nTrackRef; ++iTrackRef) {
214 Int_t nHits = fMCEventHandler->GetParticleAndTR(iTrackRef, particle, trackRefs);
48217459 215
96ebe67e 216 // skip empty trackRefs
217 if (nHits < 1) continue;
218
61fed964 219 // get the particle charge for further calculation
220 TParticlePDG* ppdg = particle->GetPDG();
46df197d 221 Int_t charge = ppdg != NULL ? (Int_t)(ppdg->Charge()/3.0) : 0;
96ebe67e 222
61fed964 223 AliMUONTrack track;
48217459 224
96ebe67e 225 // loop over simulated track hits
226 for (Int_t iHit = 0; iHit < nHits; ++iHit) {
227 AliTrackReference* trackReference = static_cast<AliTrackReference*>(trackRefs->UncheckedAt(iHit));
068e4c36 228
61fed964 229 // skip trackRefs not in MUON
230 if (trackReference->DetectorId() != AliTrackReference::kMUON) continue;
231
96ebe67e 232 // Get track parameters of current hit
233 x = trackReference->X();
234 y = trackReference->Y();
235 z = trackReference->Z();
236 pX = trackReference->Px();
237 pY = trackReference->Py();
238 pZ = trackReference->Pz();
b8dc484b 239
96ebe67e 240 // check chamberId of current trackReference
241 Int_t chamberId = AliMUONConstants::ChamberNumber(z);
242 if (chamberId < 0 || chamberId >= AliMUONConstants::NTrackingCh()) continue;
48217459 243
96ebe67e 244 // set hit parameters
103e6575 245 hit->SetUniqueID(AliMUONVCluster::BuildUniqueID(chamberId, 0, 0));
246 hit->SetXYZ(x,y,z);
247 hit->SetErrXY(0.,0.);
b8dc484b 248
96ebe67e 249 // compute track parameters at hit
7cdc832b 250 bendingSlope = 0;
251 nonBendingSlope = 0;
252 inverseBendingMomentum = 0;
96ebe67e 253 if (TMath::Abs(pZ) > 0) {
254 bendingSlope = pY/pZ;
255 nonBendingSlope = pX/pZ;
b8dc484b 256 }
96ebe67e 257 Double_t pYZ = TMath::Sqrt(pY*pY+pZ*pZ);
258 if (pYZ >0) inverseBendingMomentum = 1/pYZ;
259 inverseBendingMomentum *= charge;
260
261 // set track parameters at hit
262 AliMUONTrackParam trackParam;
263 trackParam.SetNonBendingCoor(x);
264 trackParam.SetBendingCoor(y);
265 trackParam.SetZ(z);
266 trackParam.SetBendingSlope(bendingSlope);
267 trackParam.SetNonBendingSlope(nonBendingSlope);
268 trackParam.SetInverseBendingMomentum(inverseBendingMomentum);
269
270 // add track parameters at current hit to the track
103e6575 271 track.AddTrackParamAtCluster(trackParam, *hit, kTRUE);
96ebe67e 272 }
273
61fed964 274 // if none of the track hits was in MUON, goto the next track
275 if (track.GetNClusters() < 1) continue;
276
277 // get track parameters at particle's vertex
278 x = particle->Vx();
279 y = particle->Vy();
280 z = particle->Vz();
281 pX = particle->Px();
282 pY = particle->Py();
283 pZ = particle->Pz();
284
285 // compute rest of track parameters at particle's vertex
286 bendingSlope = 0;
287 nonBendingSlope = 0;
288 inverseBendingMomentum = 0;
289 if (TMath::Abs(pZ) > 0) {
290 bendingSlope = pY/pZ;
291 nonBendingSlope = pX/pZ;
292 }
293 Double_t pYZ = TMath::Sqrt(pY*pY+pZ*pZ);
294 if (pYZ >0) inverseBendingMomentum = 1/pYZ;
295 inverseBendingMomentum *= charge;
296
297 // set track parameters at particle's vertex
298 AliMUONTrackParam trackParamAtVertex;
299 trackParamAtVertex.SetNonBendingCoor(x);
300 trackParamAtVertex.SetBendingCoor(y);
301 trackParamAtVertex.SetZ(z);
302 trackParamAtVertex.SetBendingSlope(bendingSlope);
303 trackParamAtVertex.SetNonBendingSlope(nonBendingSlope);
304 trackParamAtVertex.SetInverseBendingMomentum(inverseBendingMomentum);
305
306 // add track parameters at vertex
307 track.SetTrackParamAtVertex(&trackParamAtVertex);
308
103e6575 309 // store the track
96ebe67e 310 track.SetTrackID(iTrackRef);
311 tmpTrackRefStore->Add(track);
b8dc484b 312 }
b8dc484b 313
96ebe67e 314 CleanMuonTrackRef(tmpTrackRefStore);
48217459 315
103e6575 316 delete hit;
317 delete cStore;
96ebe67e 318 delete tmpTrackRefStore;
b8dc484b 319}
320
321//_____________________________________________________________________________
96ebe67e 322void AliMUONRecoCheck::CleanMuonTrackRef(const AliMUONVTrackStore *tmpTrackRefStore)
b8dc484b 323{
48217459 324 /// Re-calculate hits parameters because two AliTrackReferences are recorded for
325 /// each chamber (one when particle is entering + one when particle is leaving
326 /// the sensitive volume)
103e6575 327 if (!(fTrackRefStore = AliMUONESDInterface::NewTrackStore())) return;
48217459 328
96ebe67e 329 Double_t maxGasGap = 1.; // cm
330 Double_t x, y, z, pX, pY, pZ, x1, y1, z1, pX1, pY1, pZ1, z2;
331 Double_t bendingSlope,nonBendingSlope,inverseBendingMomentum;
103e6575 332 AliMUONVClusterStore* cStore = AliMUONESDInterface::NewClusterStore();
333 if (!cStore) return;
334 AliMUONVCluster* hit = cStore->CreateCluster(0,0,0);
48217459 335
96ebe67e 336 // create iterator
337 TIter next(tmpTrackRefStore->CreateIterator());
48217459 338
96ebe67e 339 // loop over tmpTrackRef
48217459 340 AliMUONTrack* track;
96ebe67e 341 while ( ( track = static_cast<AliMUONTrack*>(next()) ) ) {
342
343 AliMUONTrack newTrack;
344
345 // loop over tmpTrackRef's hits
346 Int_t iHit1 = 0;
347 Int_t nTrackHits = track->GetNClusters();
348 while (iHit1 < nTrackHits) {
349 AliMUONTrackParam *trackParam1 = (AliMUONTrackParam*) track->GetTrackParamAtCluster()->UncheckedAt(iHit1);
350
351 // get track parameters at hit1
352 x1 = trackParam1->GetNonBendingCoor();
353 y1 = trackParam1->GetBendingCoor();
354 z1 = trackParam1->GetZ();
355 pX1 = trackParam1->Px();
356 pY1 = trackParam1->Py();
357 pZ1 = trackParam1->Pz();
358
359 // prepare new track parameters
360 x = x1;
361 y = y1;
362 z = z1;
363 pX = pX1;
364 pY = pY1;
365 pZ = pZ1;
366
367 // loop over next tmpTrackRef's hits
368 Int_t nCombinedHits = 1;
369 for (Int_t iHit2 = iHit1+1; iHit2 < nTrackHits; iHit2++) {
370 AliMUONTrackParam *trackParam2 = (AliMUONTrackParam*) track->GetTrackParamAtCluster()->UncheckedAt(iHit2);
48217459 371
96ebe67e 372 // get z position of hit2
373 z2 = trackParam2->GetZ();
374
375 // complete new track parameters if hit2 is on the same detection element
376 if ( TMath::Abs(z2-z1) < maxGasGap ) {
377 x += trackParam2->GetNonBendingCoor();
378 y += trackParam2->GetBendingCoor();
379 z += z2;
380 pX += trackParam2->Px();
381 pY += trackParam2->Py();
382 pZ += trackParam2->Pz();
383 nCombinedHits++;
48217459 384 iHit1 = iHit2;
385 }
386
96ebe67e 387 }
388
389 // finalize new track parameters
390 x /= (Double_t)nCombinedHits;
391 y /= (Double_t)nCombinedHits;
392 z /= (Double_t)nCombinedHits;
393 pX /= (Double_t)nCombinedHits;
394 pY /= (Double_t)nCombinedHits;
395 pZ /= (Double_t)nCombinedHits;
396 bendingSlope = 0;
397 nonBendingSlope = 0;
398 inverseBendingMomentum = 0;
399 if (TMath::Abs(pZ) > 0) {
400 bendingSlope = pY/pZ;
401 nonBendingSlope = pX/pZ;
402 }
403 Double_t pYZ = TMath::Sqrt(pY*pY+pZ*pZ);
404 if (pYZ >0) inverseBendingMomentum = 1/pYZ;
405 inverseBendingMomentum *= trackParam1->GetCharge();
b8dc484b 406
96ebe67e 407 // set hit parameters
103e6575 408 hit->SetUniqueID(AliMUONVCluster::BuildUniqueID(trackParam1->GetClusterPtr()->GetChamberId(), 0, 0));
409 hit->SetXYZ(x,y,z);
410 hit->SetErrXY(0.,0.);
48217459 411
96ebe67e 412 // set new track parameters at new hit
413 AliMUONTrackParam trackParam;
414 trackParam.SetNonBendingCoor(x);
415 trackParam.SetBendingCoor(y);
416 trackParam.SetZ(z);
417 trackParam.SetBendingSlope(bendingSlope);
418 trackParam.SetNonBendingSlope(nonBendingSlope);
419 trackParam.SetInverseBendingMomentum(inverseBendingMomentum);
420
421 // add track parameters at current hit to the track
103e6575 422 newTrack.AddTrackParamAtCluster(trackParam, *hit, kTRUE);
b8dc484b 423
424 iHit1++;
96ebe67e 425 }
48217459 426
96ebe67e 427 newTrack.SetTrackID(track->GetTrackID());
428 newTrack.SetTrackParamAtVertex(track->GetTrackParamAtVertex());
429 fTrackRefStore->Add(newTrack);
b8dc484b 430
96ebe67e 431 }
b8dc484b 432
103e6575 433 delete hit;
434 delete cStore;
b8dc484b 435}
436
437//_____________________________________________________________________________
96ebe67e 438void AliMUONRecoCheck::MakeReconstructibleTracks()
b8dc484b 439{
61fed964 440 /// Isolate the reconstructible tracks
103e6575 441 if (!(fRecoTrackRefStore = AliMUONESDInterface::NewTrackStore())) return;
48217459 442
96ebe67e 443 // create iterator on trackRef
444 TIter next(fTrackRefStore->CreateIterator());
b8dc484b 445
96ebe67e 446 // loop over trackRef
48217459 447 AliMUONTrack* track;
96ebe67e 448 while ( ( track = static_cast<AliMUONTrack*>(next()) ) ) {
449
450 Bool_t* chamberInTrack = new Bool_t(AliMUONConstants::NTrackingCh());
451 for (Int_t iCh = 0; iCh < AliMUONConstants::NTrackingCh(); iCh++) chamberInTrack[iCh] = kFALSE;
48217459 452
96ebe67e 453 // loop over trackRef's hits to get hit chambers
454 Int_t nTrackHits = track->GetNClusters();
455 for (Int_t iHit = 0; iHit < nTrackHits; iHit++) {
456 AliMUONVCluster* hit = ((AliMUONTrackParam*) track->GetTrackParamAtCluster()->UncheckedAt(iHit))->GetClusterPtr();
457 chamberInTrack[hit->GetChamberId()] = kTRUE;
cc056de1 458 }
96ebe67e 459
cc056de1 460 // track is reconstructible if the particle is depositing a hit
461 // in the following chamber combinations:
96ebe67e 462 Bool_t trackOK = kTRUE;
463 if (!chamberInTrack[0] && !chamberInTrack[1]) trackOK = kFALSE;
464 if (!chamberInTrack[2] && !chamberInTrack[3]) trackOK = kFALSE;
465 if (!chamberInTrack[4] && !chamberInTrack[5]) trackOK = kFALSE;
466 Int_t nHitsInLastStations = 0;
467 for (Int_t iCh = 6; iCh < AliMUONConstants::NTrackingCh(); iCh++)
468 if (chamberInTrack[iCh]) nHitsInLastStations++;
469 if(nHitsInLastStations < 3) trackOK = kFALSE;
48217459 470
96ebe67e 471 // Add reconstructible tracks to fRecoTrackRefStore
472 if (trackOK) fRecoTrackRefStore->Add(*track);
48217459 473
96ebe67e 474 delete [] chamberInTrack;
b8dc484b 475 }
48217459 476
b8dc484b 477}
478