Trigger inputs for AOD MC
[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);
274c2dce 59 fDigitsInCluster -> SetOwner(kTRUE);
d4643a10 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),
274c2dce 79 fDigitsInCluster(NULL),
d4643a10 80 fIsClusterEditable(cluster.fIsClusterEditable)
81{
82
83 // copy constructor
84 for (Int_t iTrack=0; iTrack<fNMaxMCTracks; iTrack++) fMCLabel[iTrack] = (cluster.fMCLabel)[iTrack];
e21f8bf5 85 if (cluster.fDigitsInCluster) {
e21f8bf5 86 fDigitsInCluster = new TClonesArray(*(cluster.fDigitsInCluster));
87 fDigitsInCluster -> SetOwner(kTRUE);
88 }
89 else {
e21f8bf5 90 fDigitsInCluster = new TClonesArray("AliMFTDigit", fNMaxDigitsPerCluster);
91 fDigitsInCluster -> SetOwner(kTRUE);
92 }
274c2dce 93
d4643a10 94}
95
96//====================================================================================================================================================
97
98AliMFTCluster& AliMFTCluster::operator=(const AliMFTCluster& cluster) {
99
100 // Asignment operator
101
102 // check assignement to self
103 if (this == &cluster) return *this;
104
105 // base class assignement
106 TObject::operator=(cluster);
107
108 // clear memory
274c2dce 109 Clear("");
d4643a10 110
111 fX = cluster.fX;
112 fY = cluster.fY;
113 fZ = cluster.fZ;
114 fErrX = cluster.fErrX;
115 fErrY = cluster.fErrY;
116 fErrZ = cluster.fErrZ;
117 fNElectrons = cluster.fNElectrons;
118 fNMCTracks = cluster.fNMCTracks;
119 fPlane = cluster.fPlane;
120 fDetElemID = cluster.fDetElemID;
121 fSize = cluster.fSize;
122 fTrackChi2 = cluster.fTrackChi2;
123 fLocalChi2 = cluster.fLocalChi2;
d4643a10 124 fIsClusterEditable = cluster.fIsClusterEditable;
125
126 for (Int_t iTrack=0; iTrack<fNMaxMCTracks; iTrack++) fMCLabel[iTrack] = (cluster.fMCLabel)[iTrack];
274c2dce 127 fDigitsInCluster = new TClonesArray(*(cluster.fDigitsInCluster));
128 fDigitsInCluster->SetOwner(kTRUE);
129
d4643a10 130 return *this;
131
132}
133
134//====================================================================================================================================================
135
136Double_t AliMFTCluster::GetDistanceFromPixel(AliMFTDigit *pixel) {
137
138 // the distance is expressed in units of pixels!!!
139 // useful to decide if the pixel is compatible with the current digits array
140
141 Double_t distance = -1;
142
143 if (!fSize) return distance;
144
145 if (pixel->GetDetElemID()!=fDetElemID || pixel->GetPlane()!=fPlane) return 9999.;
146
147 for (Int_t iDigit=0; iDigit<fDigitsInCluster->GetEntries(); iDigit++) {
148 AliMFTDigit *tmpDig = (AliMFTDigit*) fDigitsInCluster->At(iDigit);
149 Int_t distX = TMath::Abs(tmpDig->GetPixelX() - pixel->GetPixelX());
150 Int_t distY = TMath::Abs(tmpDig->GetPixelY() - pixel->GetPixelY());
151 if (distX<=1 && distY<=1) return 0;
152 if (!iDigit) distance = TMath::Sqrt(distX*distX + distY*distY);
153 else distance = TMath::Min(distance, TMath::Sqrt(distX*distX + distY*distY));
154 }
155
156 return distance;
157
158}
159
160//====================================================================================================================================================
161
162Bool_t AliMFTCluster::AddPixel(AliMFTDigit *pixel) {
163
164 if (!fIsClusterEditable || fSize>=fNMaxDigitsPerCluster) return kFALSE;
165 if (fSize && (pixel->GetPlane()!=fPlane || pixel->GetDetElemID()!=fDetElemID)) return kFALSE;
166
167 new ((*fDigitsInCluster)[fDigitsInCluster->GetEntries()]) AliMFTDigit(*pixel);
168
169 if (!fSize) {
170 SetPlane(pixel->GetPlane());
171 SetDetElemID(pixel->GetDetElemID());
172 }
173
174 fSize++;
175
176 return kTRUE;
177
178}
179
180//====================================================================================================================================================
181
182void AliMFTCluster::TerminateCluster() {
183
184 Double_t xCenters[fNMaxDigitsPerCluster] = {0};
185 Double_t yCenters[fNMaxDigitsPerCluster] = {0};
186 Double_t nElectrons = 0.;
187
188 for (Int_t iDigit=0; iDigit<fDigitsInCluster->GetEntries(); iDigit++) {
189 AliMFTDigit *tmpDig = (AliMFTDigit*) fDigitsInCluster->At(iDigit);
190 xCenters[iDigit] = tmpDig->GetPixelCenterX();
191 yCenters[iDigit] = tmpDig->GetPixelCenterY();
192 nElectrons += tmpDig->GetNElectrons();
193 for (Int_t iTrack=0; iTrack<tmpDig->GetNMCTracks(); iTrack++) AddMCLabel(tmpDig->GetMCLabel(iTrack));
194 }
195
196 SetX(TMath::Mean(fDigitsInCluster->GetEntries(), xCenters));
197 SetY(TMath::Mean(fDigitsInCluster->GetEntries(), yCenters));
198 SetZ(((AliMFTDigit*) fDigitsInCluster->At(0))->GetPixelCenterZ());
199
200 Double_t minErrX = ((AliMFTDigit*) fDigitsInCluster->At(0))->GetPixelWidthX() / TMath::Sqrt(12.);
201 Double_t minErrY = ((AliMFTDigit*) fDigitsInCluster->At(0))->GetPixelWidthY() / TMath::Sqrt(12.);
202 Double_t minErrZ = ((AliMFTDigit*) fDigitsInCluster->At(0))->GetPixelWidthZ() / TMath::Sqrt(12.);
203 SetErrX( TMath::Max(TMath::RMS(fDigitsInCluster->GetEntries(), xCenters), minErrX) );
204 SetErrY( TMath::Max(TMath::RMS(fDigitsInCluster->GetEntries(), yCenters), minErrY) );
205 SetErrZ( minErrZ );
206
207 SetNElectrons(nElectrons);
208
209 fIsClusterEditable = kFALSE;
210
211}
212
213//====================================================================================================================================================
214
215void AliMFTCluster::AddMCLabel(Int_t label) {
216
217 if (fNMCTracks>=fNMaxMCTracks) return;
218
219 for (Int_t iTrack=0; iTrack<fNMCTracks; iTrack++) if (label==fMCLabel[iTrack]) return;
220
221 fMCLabel[fNMCTracks++]=label;
222
820b4d9e 223}
224
225//====================================================================================================================================================
226
227AliMUONRawCluster* AliMFTCluster::CreateMUONCluster() {
228
229 AliMUONRawCluster *cluster = new AliMUONRawCluster();
230
231 cluster->SetXYZ(GetX(), GetY(), GetZ());
232 cluster->SetErrXY(GetErrX(),GetErrY());
233 cluster->SetDetElemId(100); // to get the cluster compatible with the AliMUONTrack::AddTrackParamAtCluster(...) method
234
235 return cluster;
236
237}
238
239//====================================================================================================================================================