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 **************************************************************************/
18 //Authors: Mihaela Gheata, Andrei Gheata 09/10/00
19 ////////////////////////////////////////////////////////////////////
21 // AliMUONRecoEvent, AliMUONRecoTrack (and AliMUONRecoDisplay) //
23 // Theses classes are used to store and retrieve //
24 // MUON reconstructed events. //
25 // The corresponding tree is constructed and filled //
26 // during the FillEvent() method of AliMUONEventReconstructor, //
27 // when all reconstruction information is available. //
29 ////////////////////////////////////////////////////////////////////
30 ////////////////////////////////////////////////////////////////////
32 // AliMUONRecoEvent //
34 // This class handles an array of reconstructed tracks. //
36 // - filling the tracks array according to the information //
37 // stored in AliMUONEventReconstructor class ; //
38 // - printing event and track informations : event numer, //
39 // number of tracks, hits positions, reconstr. mometum. //
41 ////////////////////////////////////////////////////////////////////
42 ////////////////////////////////////////////////////////////////////
44 // AliMUONRecoTrack //
46 // This class represents a reconstructed muon track //
47 // in the tree of reconstructed events. //
49 ////////////////////////////////////////////////////////////////////
51 #include <Riostream.h>
53 #include <TClonesArray.h>
58 #include <TParticle.h>
60 #include "AliMUONRecoEvent.h"
61 #include "AliMUONEventReconstructor.h"
62 #include "AliMUONTrack.h"
63 #include "AliMUONTrackK.h"
64 #include "AliMUONTrackParam.h"
65 #include "AliMUONHitForRec.h"
66 #include "AliMUONTrackHit.h"
67 #include "AliHeader.h"
69 ClassImp(AliMUONRecoTrack)
70 ClassImp(AliMUONRecoEvent)
72 //-------------------------------------------------------------------
73 AliMUONRecoEvent::AliMUONRecoEvent(Int_t eventNo)
75 // Reconstructed event constructor
76 fTracks = new TClonesArray("AliMUONRecoTrack",200);
81 //-------------------------------------------------------------------
82 AliMUONRecoEvent::~AliMUONRecoEvent()
84 // Destructor of AliMUONRecoEvent
90 //-------------------------------------------------------------------
91 AliMUONRecoTrack* AliMUONRecoEvent::AddEmptyTrack()
93 // Add a empty AliMUONRecoTrackObject to the track list
94 TClonesArray &dumptracks = *fTracks;
95 return (new(dumptracks[fNtracks++])AliMUONRecoTrack(kTRUE));
98 //-------------------------------------------------------------------
99 void AliMUONRecoEvent::Clear(Option_t *option)
101 // Clears all track pointers from the list
102 // fTracks->Clear(option);
107 //-------------------------------------------------------------------
108 void AliMUONRecoEvent::EventInfo()
110 // Prints reconstructed event information
111 cout << "*********************Reco Dumper**************************" << endl;
112 cout << "Event number : " << fNevr << endl;
113 cout << " Number of tracks : " << fNtracks << endl;
114 AliMUONRecoTrack *currentTrack =0;
115 Int_t trackIndex = 0;
116 for(trackIndex=0; trackIndex<fNtracks; trackIndex++) {
117 currentTrack = (AliMUONRecoTrack*)fTracks->UncheckedAt(trackIndex);
118 cout << "Track : " << trackIndex << endl;
119 cout << " Sign : " << currentTrack->GetSign() << endl;
120 cout << " Vertex position : " << currentTrack->GetVertexPos() << endl;
122 for (Int_t axis=0; axis<3; axis++) {
123 momreco[axis] = currentTrack->GetMomReconstr(axis);
125 cout << " Reconstructed mom. : " << "Px=" << momreco[0] << "Py=" << momreco[1] << "Pz=" << momreco[2] << endl;
126 cout << " Chi squared : " << currentTrack->GetChi2r() << endl;
127 cout << " Hits positions : " << endl;
128 Double_t xhit, yhit, zhit;
129 for (Int_t chamber=0; chamber<10; chamber++) {
130 xhit = currentTrack->GetPosX(chamber);
131 yhit = currentTrack->GetPosY(chamber);
132 zhit = currentTrack->GetPosZ(chamber);
133 // cout <<" chamber" << chamber << " X=" << xhit << " Y=" << yhit << " Z=" << zhit << endl;
136 cout << "**********************************************************" << endl;
139 //-------------------------------------------------------------------
140 Bool_t AliMUONRecoEvent::MakeDumpTracks(Int_t muons, TClonesArray *tracksPtr,
141 AliMUONEventReconstructor *EventReco)
143 // This method takes the pointer of the list of reconstructed tracks from
144 // AliMUONEventReconstructor and fill the reconstructed AliMUONRecoEvent
147 cout << "Enter MakeDumpTracks..." << endl;
148 Int_t nTracks = tracksPtr->GetEntriesFast();
149 cout << "nTracks = "<< nTracks << endl;
151 cout << "AliMUONRecoEvent::MakeDumpTracks: Number of tracks is zero !" << endl;
154 cout << tracksPtr << endl;
156 cout << "AliMUONRecoEvent::MakeDumpTracks() : You should call SetRecoTracksPtr() first..." << endl;
160 Int_t noEvent = gAlice->GetHeader()->GetEvent();
161 cout << "noEvent = "<< nTracks << endl;
162 tracksPtr->Compress(); // simple loop
163 AliMUONRecoTrack *currentTrack;
164 Int_t trackIndex, nTrackHits = 0;
165 Double_t z, pYZ, bendingSlope, nonBendingSlope;
166 Double_t pX, pY, pZ; // reconstructed momentum components
167 Int_t isign, flag=0; // charge sign, flag of reconstructed track
168 Double_t alpha, beta;
169 TObjArray *hitsOnTrack = 0;
170 AliMUONTrackHit *trackHit = 0;
171 AliMUONTrack *track = 0;
172 AliMUONTrackK *trackK = 0;
173 TMatrixD *trackParamK; //AZnon
174 AliMUONTrackParam *trackParam = 0;
175 // Fill event number and number of tracks
177 fMuons = muons; //AZ - number of muons within acceptance
178 // Loop over reconstructed tracks
179 for (trackIndex=0; trackIndex<nTracks; trackIndex++) {
180 cout << " trackIndex = " << trackIndex << endl;
181 currentTrack = AddEmptyTrack();
182 cout << " currentTrack = " << currentTrack << endl;
184 if (EventReco->GetTrackMethod() == 2) { // Kalman
186 trackK = (AliMUONTrackK*) ((*tracksPtr)[trackIndex]);
187 nTrackHits = trackK->GetNTrackHits();
188 trackParamK = trackK->GetTrackParameters();
189 isign = Int_t(TMath::Sign(1., (*trackParamK)(4,0)));
191 alpha = (*trackParamK)(2,0);
192 beta = (*trackParamK)(3,0);
193 pYZ = TMath::Cos(beta)/TMath::Abs((*trackParamK)(4,0));
194 pZ = pYZ/TMath::Cos(alpha);
195 pX = TMath::Sin(beta)/TMath::Abs((*trackParamK)(4,0));
196 pY = pYZ*TMath::Sin(alpha);
198 currentTrack->SetVertexPos(z);
199 currentTrack->SetMomReconstr(pX,pY,pZ);
200 currentTrack->SetSign(isign);
201 currentTrack->SetChi2r(trackK->GetTrackQuality());
203 // Check hits on the track
204 hitsOnTrack = trackK->GetHitOnTrack();
207 for (int ihit = 0; ihit < nTrackHits; ihit++) {
208 signal += ((AliMUONHitForRec*)((*hitsOnTrack)[ihit]))->GetGeantSignal();
209 tht += TMath::Min (1,((AliMUONHitForRec*)((*hitsOnTrack)[ihit]))->GetTHTrack());
211 signal /= nTrackHits;
214 if (TMath::Nint(signal) > 0) { // signal muon
215 for (int ihit = 0; ihit < nTrackHits ; ihit++) {
216 if (((AliMUONHitForRec*)((*hitsOnTrack)[ihit]))->GetTHTrack() != TMath::Nint(tht)) flag++;
218 } else flag = -9; // background track
219 //cout << TMath::Nint(signal) << " " << TMath::Nint(tht) << " " << recTrackNt->fFlag << endl;
220 currentTrack->SetFlag(flag);
221 } else { // default tracking
223 track = (AliMUONTrack*) ((*tracksPtr)[trackIndex]);
224 nTrackHits = track->GetNTrackHits();
225 // track parameters at Vertex
226 trackParam = track->GetTrackParamAtVertex();
227 bendingSlope = trackParam->GetBendingSlope();
228 nonBendingSlope = trackParam->GetNonBendingSlope();
230 z = trackParam->GetZ();
231 pYZ = 1/TMath::Abs(trackParam->GetInverseBendingMomentum());
232 pZ = pYZ/TMath::Sqrt(1+bendingSlope*bendingSlope);
233 pX = pZ * nonBendingSlope;
234 pY = pZ * bendingSlope;
236 if (trackParam->GetInverseBendingMomentum()<0) isign=-1; else isign=1;
237 currentTrack->SetVertexPos(z);
238 currentTrack->SetMomReconstr(pX,pY,pZ);
239 currentTrack->SetSign(isign);
240 // currentTrack->SetChi2r(trackParam->GetChi2());
241 currentTrack->SetChi2r(0);
243 // Check hits on the track
244 hitsOnTrack = track->GetTrackHitsPtr();
247 AliMUONHitForRec *hitForRec = 0;
248 for (int ihit = 0; ihit < nTrackHits; ihit++) {
249 hitForRec = ((AliMUONTrackHit*)(*hitsOnTrack)[ihit])->GetHitForRecPtr();
250 signal += hitForRec->GetGeantSignal();
251 tht += TMath::Min (1,hitForRec->GetTHTrack());
253 signal /= nTrackHits;
256 if (TMath::Nint(signal) > 0) { // signal muon
257 for (int ihit = 0; ihit < nTrackHits ; ihit++) {
258 hitForRec = ((AliMUONTrackHit*)(*hitsOnTrack)[ihit])->GetHitForRecPtr();
259 if (hitForRec->GetTHTrack() != TMath::Nint(tht)) flag++;
261 } else flag = -9; // background track
262 //cout << TMath::Nint(signal) << " " << TMath::Nint(tht) << " " << recTrackNt->fFlag << endl;
263 currentTrack->SetFlag(flag);
266 Double_t xhit,yhit,zhit;
267 // Loop over track hits
268 for (Int_t trackHitIndex = 0; trackHitIndex < nTrackHits; trackHitIndex++) {
269 if (EventReco->GetTrackMethod() == 2) { // Kalman
270 xhit = ((AliMUONHitForRec*)((*hitsOnTrack)[trackHitIndex]))->GetNonBendingCoor();
271 yhit = ((AliMUONHitForRec*)((*hitsOnTrack)[trackHitIndex]))->GetBendingCoor();
272 zhit = ((AliMUONHitForRec*)((*hitsOnTrack)[trackHitIndex]))->GetZ();
274 trackHit = (AliMUONTrackHit*) (*(track->GetTrackHitsPtr()))[trackHitIndex];
275 xhit = trackHit->GetHitForRecPtr()->GetNonBendingCoor();
276 yhit = trackHit->GetHitForRecPtr()->GetBendingCoor();
277 zhit = trackHit->GetHitForRecPtr()->GetZ();
279 if (trackHitIndex >= 0 && trackHitIndex < 10) {
280 currentTrack->SetHitPosition(trackHitIndex,xhit,yhit,zhit);
281 } else { cout << "track " << trackIndex << " hit out of range" << endl;}
285 cout << "Leave MakeDumpTracks..." << endl;
289 //-------------------------------------------------------------------
290 void AliMUONRecoEvent::Streamer(TBuffer &R__b)
292 // Streams an object of class AliMUONRecoEvent
293 if (R__b.IsReading()) {
295 AliMUONRecoEvent::Class()->ReadBuffer(R__b, this);
297 cout << "...writing event to file...\n";
298 AliMUONRecoEvent::Class()->WriteBuffer(R__b, this);
302 //-------------------------------------------------------------------
303 AliMUONRecoTrack::AliMUONRecoTrack(Bool_t active)
305 //Constructor of AliMUONRecoTrack
310 for (Int_t axis=0; axis<3; axis++) {
313 for (Int_t chamber=0; chamber<10; chamber++) {
314 fPosX[chamber] = 0.0;
315 fPosY[chamber] = 0.0;
316 fPosZ[chamber] = 0.0;
321 //-------------------------------------------------------------------
322 const Double_t AliMUONRecoTrack::Phi()
324 // Return trach phi angle
325 return TMath::ATan2(fPr[2], fPr[1]);
328 //-------------------------------------------------------------------
329 const Double_t AliMUONRecoTrack::Theta()
331 // Return trach theta angle
332 return TMath::ACos(fPr[2] / P());
335 //-------------------------------------------------------------------
336 void AliMUONRecoTrack::SetMomReconstr(Double_t px, Double_t py, Double_t pz)
338 // Set the track reconstructed momentum
344 //-------------------------------------------------------------------
345 void AliMUONRecoTrack::SetHitPosition(Int_t chamber, Double_t x, Double_t y, Double_t z)
347 // Set hit coordinates in chamber[0..9]
352 //-------------------------------------------------------------------
353 void AliMUONRecoTrack::TrackInfo()
355 // Prints momentum info for this track
356 cout << "Px=" << GetMomReconstr(0) << " Py=" << GetMomReconstr(1) <<
357 " Pz=" << GetMomReconstr(2) << " P=" << P() << endl;