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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 | ||
31 | ClassImp(AliMFTCluster) | |
32 | ||
33 | //==================================================================================================================================================== | |
34 | ||
35 | AliMFTCluster::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 | ||
64 | AliMFTCluster::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 | ||
90 | AliMFTCluster& 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 | ||
127 | Double_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 | ||
153 | Bool_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 | ||
173 | void 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 | ||
206 | void 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 | ||
218 | AliMUONRawCluster* 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 | //==================================================================================================================================================== |