Modified init of AliMuonForwardTrack
[u/mrichter/AliRoot.git] / MFT / AliMFTCluster.cxx
CommitLineData
820b4d9e 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
16//====================================================================================================================================================
17//
18// Class for the description of the clusters of the ALICE Muon Forward Tracker
19//
20// Contact author: antonio.uras@cern.ch
21//
22//====================================================================================================================================================
23
24#include "TObject.h"
25#include "AliMUONRawCluster.h"
26#include "AliMUONVCluster.h"
d4643a10 27#include "AliMFTDigit.h"
28#include "TMath.h"
820b4d9e 29#include "AliMFTCluster.h"
30
31ClassImp(AliMFTCluster)
32
33//====================================================================================================================================================
34
35AliMFTCluster::AliMFTCluster():
36 TObject(),
37 fX(0),
38 fY(0),
39 fZ(0),
40 fErrX(0),
41 fErrY(0),
42 fErrZ(0),
43 fNElectrons(0),
44 fNMCTracks(0),
d4643a10 45 fPlane(-1),
46 fDetElemID(-1),
820b4d9e 47 fSize(0),
48 fTrackChi2(0),
d4643a10 49 fLocalChi2(0),
50 fDigitsInCluster(0),
51 fIsClusterEditable(kTRUE)
820b4d9e 52{
53
54 // default constructor
55
56 for (Int_t iTrack=0; iTrack<fNMaxMCTracks; iTrack++) fMCLabel[iTrack] = -1;
57
d4643a10 58 fDigitsInCluster = new TClonesArray("AliMFTDigit", fNMaxDigitsPerCluster);
59
60}
61
62//====================================================================================================================================================
63
64AliMFTCluster::AliMFTCluster(const AliMFTCluster& cluster):
65 TObject(cluster),
66 fX(cluster.fX),
67 fY(cluster.fY),
68 fZ(cluster.fZ),
69 fErrX(cluster.fErrX),
70 fErrY(cluster.fErrY),
71 fErrZ(cluster.fErrZ),
72 fNElectrons(cluster.fNElectrons),
73 fNMCTracks(cluster.fNMCTracks),
74 fPlane(cluster.fPlane),
75 fDetElemID(cluster.fDetElemID),
76 fSize(cluster.fSize),
77 fTrackChi2(cluster.fTrackChi2),
78 fLocalChi2(cluster.fLocalChi2),
79 fDigitsInCluster(cluster.fDigitsInCluster),
80 fIsClusterEditable(cluster.fIsClusterEditable)
81{
82
83 // copy constructor
84 for (Int_t iTrack=0; iTrack<fNMaxMCTracks; iTrack++) fMCLabel[iTrack] = (cluster.fMCLabel)[iTrack];
85
86}
87
88//====================================================================================================================================================
89
90AliMFTCluster& AliMFTCluster::operator=(const AliMFTCluster& cluster) {
91
92 // Asignment operator
93
94 // check assignement to self
95 if (this == &cluster) return *this;
96
97 // base class assignement
98 TObject::operator=(cluster);
99
100 // clear memory
101 Clear();
102
103 fX = cluster.fX;
104 fY = cluster.fY;
105 fZ = cluster.fZ;
106 fErrX = cluster.fErrX;
107 fErrY = cluster.fErrY;
108 fErrZ = cluster.fErrZ;
109 fNElectrons = cluster.fNElectrons;
110 fNMCTracks = cluster.fNMCTracks;
111 fPlane = cluster.fPlane;
112 fDetElemID = cluster.fDetElemID;
113 fSize = cluster.fSize;
114 fTrackChi2 = cluster.fTrackChi2;
115 fLocalChi2 = cluster.fLocalChi2;
116 fDigitsInCluster = cluster.fDigitsInCluster;
117 fIsClusterEditable = cluster.fIsClusterEditable;
118
119 for (Int_t iTrack=0; iTrack<fNMaxMCTracks; iTrack++) fMCLabel[iTrack] = (cluster.fMCLabel)[iTrack];
120
121 return *this;
122
123}
124
125//====================================================================================================================================================
126
127Double_t AliMFTCluster::GetDistanceFromPixel(AliMFTDigit *pixel) {
128
129 // the distance is expressed in units of pixels!!!
130 // useful to decide if the pixel is compatible with the current digits array
131
132 Double_t distance = -1;
133
134 if (!fSize) return distance;
135
136 if (pixel->GetDetElemID()!=fDetElemID || pixel->GetPlane()!=fPlane) return 9999.;
137
138 for (Int_t iDigit=0; iDigit<fDigitsInCluster->GetEntries(); iDigit++) {
139 AliMFTDigit *tmpDig = (AliMFTDigit*) fDigitsInCluster->At(iDigit);
140 Int_t distX = TMath::Abs(tmpDig->GetPixelX() - pixel->GetPixelX());
141 Int_t distY = TMath::Abs(tmpDig->GetPixelY() - pixel->GetPixelY());
142 if (distX<=1 && distY<=1) return 0;
143 if (!iDigit) distance = TMath::Sqrt(distX*distX + distY*distY);
144 else distance = TMath::Min(distance, TMath::Sqrt(distX*distX + distY*distY));
145 }
146
147 return distance;
148
149}
150
151//====================================================================================================================================================
152
153Bool_t AliMFTCluster::AddPixel(AliMFTDigit *pixel) {
154
155 if (!fIsClusterEditable || fSize>=fNMaxDigitsPerCluster) return kFALSE;
156 if (fSize && (pixel->GetPlane()!=fPlane || pixel->GetDetElemID()!=fDetElemID)) return kFALSE;
157
158 new ((*fDigitsInCluster)[fDigitsInCluster->GetEntries()]) AliMFTDigit(*pixel);
159
160 if (!fSize) {
161 SetPlane(pixel->GetPlane());
162 SetDetElemID(pixel->GetDetElemID());
163 }
164
165 fSize++;
166
167 return kTRUE;
168
169}
170
171//====================================================================================================================================================
172
173void AliMFTCluster::TerminateCluster() {
174
175 Double_t xCenters[fNMaxDigitsPerCluster] = {0};
176 Double_t yCenters[fNMaxDigitsPerCluster] = {0};
177 Double_t nElectrons = 0.;
178
179 for (Int_t iDigit=0; iDigit<fDigitsInCluster->GetEntries(); iDigit++) {
180 AliMFTDigit *tmpDig = (AliMFTDigit*) fDigitsInCluster->At(iDigit);
181 xCenters[iDigit] = tmpDig->GetPixelCenterX();
182 yCenters[iDigit] = tmpDig->GetPixelCenterY();
183 nElectrons += tmpDig->GetNElectrons();
184 for (Int_t iTrack=0; iTrack<tmpDig->GetNMCTracks(); iTrack++) AddMCLabel(tmpDig->GetMCLabel(iTrack));
185 }
186
187 SetX(TMath::Mean(fDigitsInCluster->GetEntries(), xCenters));
188 SetY(TMath::Mean(fDigitsInCluster->GetEntries(), yCenters));
189 SetZ(((AliMFTDigit*) fDigitsInCluster->At(0))->GetPixelCenterZ());
190
191 Double_t minErrX = ((AliMFTDigit*) fDigitsInCluster->At(0))->GetPixelWidthX() / TMath::Sqrt(12.);
192 Double_t minErrY = ((AliMFTDigit*) fDigitsInCluster->At(0))->GetPixelWidthY() / TMath::Sqrt(12.);
193 Double_t minErrZ = ((AliMFTDigit*) fDigitsInCluster->At(0))->GetPixelWidthZ() / TMath::Sqrt(12.);
194 SetErrX( TMath::Max(TMath::RMS(fDigitsInCluster->GetEntries(), xCenters), minErrX) );
195 SetErrY( TMath::Max(TMath::RMS(fDigitsInCluster->GetEntries(), yCenters), minErrY) );
196 SetErrZ( minErrZ );
197
198 SetNElectrons(nElectrons);
199
200 fIsClusterEditable = kFALSE;
201
202}
203
204//====================================================================================================================================================
205
206void AliMFTCluster::AddMCLabel(Int_t label) {
207
208 if (fNMCTracks>=fNMaxMCTracks) return;
209
210 for (Int_t iTrack=0; iTrack<fNMCTracks; iTrack++) if (label==fMCLabel[iTrack]) return;
211
212 fMCLabel[fNMCTracks++]=label;
213
820b4d9e 214}
215
216//====================================================================================================================================================
217
218AliMUONRawCluster* AliMFTCluster::CreateMUONCluster() {
219
220 AliMUONRawCluster *cluster = new AliMUONRawCluster();
221
222 cluster->SetXYZ(GetX(), GetY(), GetZ());
223 cluster->SetErrXY(GetErrX(),GetErrY());
224 cluster->SetDetElemId(100); // to get the cluster compatible with the AliMUONTrack::AddTrackParamAtCluster(...) method
225
226 return cluster;
227
228}
229
230//====================================================================================================================================================