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 Revision 1.2 2000/11/23 10:09:38 gosset
19 Bug correction in AliMUONRecoDisplay.
20 Copyright, $Log$, $Id$, comments at the right place for automatic documentation,
21 in AliMUONRecoEvent and AliMUONRecoDisplay
25 //Authors: Mihaela Gheata, Andrei Gheata 09/10/00
26 ////////////////////////////////////////////////////////////////////
28 // AliMUONRecoEvent, AliMUONRecoTrack (and AliMUONRecoDisplay) //
30 // Theses classes are used to store and retrieve //
31 // MUON reconstructed events. //
32 // The corresponding tree is constructed and filled //
33 // during the FillEvent() method of AliMUONEventReconstructor, //
34 // when all reconstruction information is available. //
36 ////////////////////////////////////////////////////////////////////
37 ////////////////////////////////////////////////////////////////////
39 // AliMUONRecoEvent //
41 // This class handles an array of reconstructed tracks. //
43 // - filling the tracks array according to the information //
44 // stored in AliMUONEventReconstructor class ; //
45 // - printing event and track informations : event numer, //
46 // number of tracks, hits positions, reconstr. mometum. //
48 ////////////////////////////////////////////////////////////////////
49 ////////////////////////////////////////////////////////////////////
51 // AliMUONRecoTrack //
53 // This class represents a reconstructed muon track //
54 // in the tree of reconstructed events. //
56 ////////////////////////////////////////////////////////////////////
60 #include <TClonesArray.h>
61 #include "AliMUONRecoEvent.h"
62 #include "AliMUONTrack.h"
63 #include "AliMUONTrackParam.h"
64 #include "AliMUONHitForRec.h"
65 #include "AliMUONTrackHit.h"
67 ClassImp(AliMUONRecoTrack)
68 ClassImp(AliMUONRecoEvent)
70 //-------------------------------------------------------------------
71 AliMUONRecoEvent::AliMUONRecoEvent(Int_t eventNo)
73 // Reconstructed event constructor
74 fTracks = new TClonesArray("AliMUONRecoTrack",200);
79 //-------------------------------------------------------------------
80 AliMUONRecoEvent::~AliMUONRecoEvent()
82 // Destructor of AliMUONRecoEvent
88 //-------------------------------------------------------------------
89 AliMUONRecoTrack* AliMUONRecoEvent::AddEmptyTrack()
91 // Add a empty AliMUONRecoTrackObject to the track list
92 TClonesArray &dumptracks = *fTracks;
93 return (new(dumptracks[fNtracks++])AliMUONRecoTrack(kTRUE));
96 //-------------------------------------------------------------------
97 void AliMUONRecoEvent::Clear(Option_t *option)
99 // Clears all track pointers from the list
100 // fTracks->Clear(option);
105 //-------------------------------------------------------------------
106 void AliMUONRecoEvent::EventInfo()
108 // Prints reconstructed event information
109 cout << "*********************Reco Dumper**************************" << endl;
110 cout << "Event number : " << fNevr << endl;
111 cout << " Number of tracks : " << fNtracks << endl;
112 AliMUONRecoTrack *currentTrack =0;
113 Int_t trackIndex = 0;
114 for(trackIndex=0; trackIndex<fNtracks; trackIndex++) {
115 currentTrack = (AliMUONRecoTrack*)fTracks->UncheckedAt(trackIndex);
116 cout << "Track : " << trackIndex << endl;
117 cout << " Sign : " << currentTrack->GetSign() << endl;
118 cout << " Vertex position : " << currentTrack->GetVertexPos() << endl;
120 for (Int_t axis=0; axis<3; axis++) {
121 momreco[axis] = currentTrack->GetMomReconstr(axis);
123 cout << " Reconstructed mom. : " << "Px=" << momreco[0] << "Py=" << momreco[1] << "Pz=" << momreco[2] << endl;
124 cout << " Chi squared : " << currentTrack->GetChi2r() << endl;
125 cout << " Hits positions : " << endl;
126 Double_t xhit, yhit, zhit;
127 for (Int_t chamber=0; chamber<10; chamber++) {
128 xhit = currentTrack->GetPosX(chamber);
129 yhit = currentTrack->GetPosY(chamber);
130 zhit = currentTrack->GetPosZ(chamber);
131 // cout <<" chamber" << chamber << " X=" << xhit << " Y=" << yhit << " Z=" << zhit << endl;
134 cout << "**********************************************************" << endl;
137 //-------------------------------------------------------------------
138 Bool_t AliMUONRecoEvent::MakeDumpTracks(TClonesArray *tracksPtr)
140 // This method takes the pointer of the list of reconstructed tracks from
141 // AliMUONEventReconstructor and fill the reconstructed AliMUONRecoEvent
143 cout << "Enter MakeDumpTracks..." << endl;
144 Int_t nTracks = tracksPtr->GetEntriesFast();
146 cout << "AliMUONRecoEvent::MakeDumpTracks: Number of tracks is zero !" << endl;
149 cout << tracksPtr << endl;
151 cout << "AliMUONRecoEvent::MakeDumpTracks() : You should call SetRecoTracksPtr() first..." << endl;
155 Int_t noEvent = gAlice->GetHeader()->GetEvent();
156 tracksPtr->Compress(); // simple loop
157 AliMUONRecoTrack *currentTrack;
158 Int_t trackIndex = 0, nTrackHits = 0;
159 Double_t z,bendingSlope, nonBendingSlope, pYZ;
160 Double_t pX, pY, pZ; // reconstructed momentum components
161 Int_t isign; // charge sign
162 AliMUONTrack *track = 0;
163 AliMUONTrackParam *trackParam = 0;
164 // Fill event number and number of tracks
166 // Loop over reconstructed tracks
167 for (trackIndex=0; trackIndex<nTracks; trackIndex++) {
168 currentTrack = AddEmptyTrack();
169 track = (AliMUONTrack*) ((*tracksPtr)[trackIndex]);
170 nTrackHits = track->GetNTrackHits();
171 trackParam = track->GetTrackParamAtVertex();
172 bendingSlope = trackParam->GetBendingSlope();
173 nonBendingSlope = trackParam->GetNonBendingSlope();
174 z = trackParam->GetZ();
175 pYZ = 1/TMath::Abs(trackParam->GetInverseBendingMomentum());
176 pZ = pYZ/TMath::Sqrt(1+bendingSlope*bendingSlope);
177 pX = pZ * nonBendingSlope;
178 pY = pZ * bendingSlope;
179 if (trackParam->GetInverseBendingMomentum()<0) isign=-1; else isign=1;
180 currentTrack->SetVertexPos(z);
181 currentTrack->SetMomReconstr(pX,pY,pZ);
182 currentTrack->SetSign(isign);
183 // currentTrack->SetChi2r(trackParam->GetChi2());
184 currentTrack->SetChi2r(0);
185 AliMUONTrackHit *trackHit;
186 Double_t xhit,yhit,zhit;
187 // Loop over track hits
188 for (Int_t trackHitIndex = 0; trackHitIndex < nTrackHits; trackHitIndex++) {
189 trackHit = (AliMUONTrackHit*) (*(track->GetTrackHitsPtr()))[trackHitIndex];
190 xhit = trackHit->GetHitForRecPtr()->GetNonBendingCoor();
191 yhit = trackHit->GetHitForRecPtr()->GetBendingCoor();
192 zhit = trackHit->GetHitForRecPtr()->GetZ();
193 if (trackHitIndex >= 0 && trackHitIndex < 10) {
194 currentTrack->SetHitPosition(trackHitIndex,xhit,yhit,zhit);
195 } else { cout << "track " << trackIndex << " hit out of range" << endl;}
198 cout << "Leave MakeDumpTracks..." << endl;
202 //-------------------------------------------------------------------
203 void AliMUONRecoEvent::Streamer(TBuffer &R__b)
205 // Streams an object of class AliMUONRecoEvent
206 if (R__b.IsReading()) {
207 Version_t R__v = R__b.ReadVersion(); if (R__v) { }
208 TObject::Streamer(R__b);
212 fTracks->Streamer(R__b);
214 cout << "...writing event to file...\n";
215 R__b.WriteVersion(AliMUONRecoEvent::IsA());
216 TObject::Streamer(R__b);
219 fTracks->Streamer(R__b);
223 //-------------------------------------------------------------------
224 AliMUONRecoTrack::AliMUONRecoTrack(Bool_t active)
226 //Constructor of AliMUONRecoTrack
231 for (Int_t axis=0; axis<3; axis++) {
234 for (Int_t chamber=0; chamber<10; chamber++) {
235 fPosX[chamber] = 0.0;
236 fPosY[chamber] = 0.0;
237 fPosZ[chamber] = 0.0;
242 //-------------------------------------------------------------------
243 const Double_t AliMUONRecoTrack::Phi()
245 // Return trach phi angle
246 return TMath::ATan2(fPr[2], fPr[1]);
249 //-------------------------------------------------------------------
250 const Double_t AliMUONRecoTrack::Theta()
252 // Return trach theta angle
253 return TMath::ACos(fPr[3] / P());
256 //-------------------------------------------------------------------
257 void AliMUONRecoTrack::SetMomReconstr(Double_t px, Double_t py, Double_t pz)
259 // Set the track reconstructed momentum
265 //-------------------------------------------------------------------
266 void AliMUONRecoTrack::SetHitPosition(Int_t chamber, Double_t x, Double_t y, Double_t z)
268 // Set hit coordinates in chamber[0..9]
273 //-------------------------------------------------------------------
274 void AliMUONRecoTrack::TrackInfo()
276 // Prints momentum info for this track
277 cout << "Px=" << GetMomReconstr(0) << " Py=" << GetMomReconstr(1) <<
278 " Pz=" << GetMomReconstr(2) << " P=" << P() << endl;