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a9e2aefa | 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 | ||
88cb7938 | 16 | /* $Id$ */ |
a9e2aefa | 17 | |
18 | //__________________________________________________________________________ | |
19 | // | |
20 | // Hit for reconstruction in ALICE dimuon spectrometer | |
21 | //__________________________________________________________________________ | |
22 | ||
29fc2c86 | 23 | #include "AliTrackReference.h" |
a9e2aefa | 24 | #include "AliMUONHitForRec.h" |
a9e2aefa | 25 | #include "AliMUONRawCluster.h" |
26 | #include "AliMUONHit.h" | |
29fc2c86 | 27 | #include "AliMUONConstants.h" |
8c343c7c | 28 | #include "AliLog.h" |
a9e2aefa | 29 | |
30 | ClassImp(AliMUONHitForRec) // Class implementation in ROOT context | |
31 | ||
32 | //__________________________________________________________________________ | |
30178c30 | 33 | AliMUONHitForRec::AliMUONHitForRec() |
34 | : TObject() | |
35 | { | |
36 | // Default Constructor | |
37 | ||
38 | fFirstTrackHitPtr = 0; | |
39 | fLastTrackHitPtr = 0; | |
40 | } | |
41 | ||
42 | //__________________________________________________________________________ | |
29fc2c86 | 43 | AliMUONHitForRec::AliMUONHitForRec(AliTrackReference* theGhit) |
30178c30 | 44 | : TObject() |
a9e2aefa | 45 | { |
29fc2c86 | 46 | // Constructor for AliMUONHitForRec from a track ref. hit. |
a9e2aefa | 47 | // Fills the bending, non bending, and Z coordinates, |
29fc2c86 | 48 | // which are taken from the coordinates of the track ref. hit, |
49 | // the track number (track ref. and not TH), | |
a9e2aefa | 50 | // and the chamber number (0...). |
30178c30 | 51 | fBendingCoor = theGhit->Y(); |
52 | fNonBendingCoor = theGhit->X(); | |
53 | fZ = theGhit->Z(); | |
54 | // fTrack = theGhit->fTrack; ????????? | |
29fc2c86 | 55 | fChamberNumber = AliMUONConstants::ChamberNumber(fZ); |
38804330 | 56 | fDetElemId = 0; |
a9e2aefa | 57 | // other fields will be updated in |
29fc2c86 | 58 | // AliMUONEventReconstructor::NewHitForRecFromTrackRef, |
a9e2aefa | 59 | // except the following ones |
60 | fIndexOfFirstSegment = -1; | |
61 | fNSegments = 0; | |
62 | fFirstTrackHitPtr = fLastTrackHitPtr = NULL; | |
63 | fNTrackHits = 0; | |
64 | return; | |
65 | } | |
66 | ||
67 | // //__________________________________________________________________________ | |
68 | // AliMUONHitForRec::AliMUONHitForRec(AliMUONReconstHit* CathCorrel) | |
69 | // { | |
70 | // // Constructor for AliMUONHitForRec from a (cathode correlated) raw cluster. | |
71 | // // Fills the bending and non bending coordinates. | |
72 | // // Only the first correlation is taken into account. | |
73 | // // The bending coordinate is taken from the first cathode. | |
74 | // // The non bending coordinate is taken | |
75 | // // from the second cathode if it exists, | |
76 | // // from the first one otherwise. | |
77 | // fBendingCoor = CathCorrel->fY[3]; | |
78 | // if (CathCorrel->fCorrelIndex[0] >= 0) fNonBendingCoor = CathCorrel->fX[0]; | |
79 | // else fNonBendingCoor = CathCorrel->fX[3]; | |
80 | // return; | |
81 | // } | |
82 | ||
83 | //__________________________________________________________________________ | |
30178c30 | 84 | AliMUONHitForRec::AliMUONHitForRec(AliMUONRawCluster* theRawCluster) |
85 | : TObject() | |
a9e2aefa | 86 | { |
87 | // Constructor for AliMUONHitForRec from a raw cluster. | |
88 | // Fills the bending and non bending coordinates. | |
30178c30 | 89 | fNonBendingCoor = theRawCluster->GetX(0); |
90 | fBendingCoor = theRawCluster->GetY(0); | |
38804330 | 91 | fDetElemId=0; |
a9e2aefa | 92 | // other fields will be updated in |
93 | // AliMUONEventReconstructor::AddHitsForRecFromRawClusters, | |
94 | // except the following ones | |
29fc2c86 | 95 | fTTRTrack = -1; |
96 | fTrackRefSignal = -1; | |
a9e2aefa | 97 | fIndexOfFirstSegment = -1; |
98 | fNSegments = 0; | |
99 | fFirstTrackHitPtr = fLastTrackHitPtr = NULL; | |
100 | fNTrackHits = 0; | |
101 | return; | |
102 | } | |
103 | ||
30178c30 | 104 | //__________________________________________________________________________ |
b8dc484b | 105 | AliMUONHitForRec::AliMUONHitForRec (const AliMUONHitForRec& theMUONHitForRec) |
106 | : TObject(theMUONHitForRec) | |
a9e2aefa | 107 | { |
b8dc484b | 108 | fBendingCoor = theMUONHitForRec.fBendingCoor; |
109 | fNonBendingCoor = theMUONHitForRec.fNonBendingCoor; | |
110 | fZ = theMUONHitForRec.fZ; | |
111 | fBendingReso2 = theMUONHitForRec.fBendingReso2; | |
112 | fNonBendingReso2 = theMUONHitForRec.fNonBendingReso2; | |
113 | fChamberNumber = theMUONHitForRec.fChamberNumber; | |
38804330 | 114 | fDetElemId = theMUONHitForRec.fDetElemId; |
b8dc484b | 115 | fHitNumber = theMUONHitForRec.fHitNumber; |
29fc2c86 | 116 | fTTRTrack = theMUONHitForRec.fTTRTrack; |
117 | fTrackRefSignal = theMUONHitForRec.fTrackRefSignal; | |
b8dc484b | 118 | fIndexOfFirstSegment = theMUONHitForRec.fIndexOfFirstSegment; |
119 | fNSegments = theMUONHitForRec.fNSegments; | |
120 | fFirstTrackHitPtr = theMUONHitForRec.fFirstTrackHitPtr; | |
121 | fLastTrackHitPtr = theMUONHitForRec.fLastTrackHitPtr; | |
122 | fNTrackHits = theMUONHitForRec.fNTrackHits; | |
a9e2aefa | 123 | } |
124 | ||
30178c30 | 125 | //__________________________________________________________________________ |
b8dc484b | 126 | AliMUONHitForRec & AliMUONHitForRec::operator=(const AliMUONHitForRec& theMUONHitForRec) |
a9e2aefa | 127 | { |
b8dc484b | 128 | fBendingCoor = theMUONHitForRec.fBendingCoor; |
129 | fNonBendingCoor = theMUONHitForRec.fNonBendingCoor; | |
130 | fZ = theMUONHitForRec.fZ; | |
131 | fBendingReso2 = theMUONHitForRec.fBendingReso2; | |
132 | fNonBendingReso2 = theMUONHitForRec.fNonBendingReso2; | |
133 | fChamberNumber = theMUONHitForRec.fChamberNumber; | |
38804330 | 134 | fDetElemId = theMUONHitForRec.fDetElemId; |
b8dc484b | 135 | fHitNumber = theMUONHitForRec.fHitNumber; |
29fc2c86 | 136 | fTTRTrack = theMUONHitForRec.fTTRTrack; |
137 | fTrackRefSignal = theMUONHitForRec.fTrackRefSignal; | |
b8dc484b | 138 | fIndexOfFirstSegment = theMUONHitForRec.fIndexOfFirstSegment; |
139 | fNSegments = theMUONHitForRec.fNSegments; | |
140 | fFirstTrackHitPtr = theMUONHitForRec.fFirstTrackHitPtr; | |
141 | fLastTrackHitPtr = theMUONHitForRec.fLastTrackHitPtr; | |
142 | fNTrackHits = theMUONHitForRec.fNTrackHits; | |
b8dc484b | 143 | return *this; |
a9e2aefa | 144 | } |
a9e2aefa | 145 | //__________________________________________________________________________ |
83dbc640 | 146 | /*AZ |
2a941f4e | 147 | Int_t AliMUONHitForRec::Compare(const TObject* Hit) const |
a9e2aefa | 148 | { |
149 | // "Compare" function to sort with increasing chamber number. | |
150 | // Returns -1 (0, +1) if ChamberNumber of current HitForRec | |
151 | // is smaller than (equal to, larger than) ChamberNumber of Hit | |
152 | if (fChamberNumber < ((AliMUONHitForRec*)Hit)->fChamberNumber) return(-1); | |
153 | else if (fChamberNumber == ((AliMUONHitForRec*)Hit)->fChamberNumber) return( 0); | |
154 | else return(+1); | |
155 | } | |
83dbc640 | 156 | */ |
157 | //__________________________________________________________________________ | |
158 | Int_t AliMUONHitForRec::Compare(const TObject* Hit) const | |
159 | { | |
5b64e914 | 160 | // "Compare" function to sort with decreasing Z-coordinate (spectro. MUON z<0). |
161 | // Returns 1 (0, -1) if Z-coordinate of current HitForRec | |
83dbc640 | 162 | // is smaller than (equal to, larger than) Z-coordinate of Hit |
5b64e914 | 163 | if (fZ < ((AliMUONHitForRec*)Hit)->fZ) return(1); |
83dbc640 | 164 | else if (fZ == ((AliMUONHitForRec*)Hit)->fZ) return( 0); |
5b64e914 | 165 | else return(-1); |
83dbc640 | 166 | } |
a9e2aefa | 167 | |
168 | //__________________________________________________________________________ | |
30178c30 | 169 | Double_t AliMUONHitForRec::NormalizedChi2WithHitForRec(AliMUONHitForRec* hitForRec, Double_t Sigma2Cut) const |
a9e2aefa | 170 | { |
30178c30 | 171 | // Calculate the normalized Chi2 between the current hitForRec (this) |
172 | // and the hitForRec pointed to by "hitForRec", | |
a9e2aefa | 173 | // i.e. the square deviations between the coordinates, |
174 | // in both the bending and the non bending plane, | |
175 | // divided by the variance of the same quantities and by "Sigma2Cut". | |
176 | // Returns 3 if none of the 2 quantities is OK, | |
177 | // something smaller than or equal to 2 otherwise. | |
178 | // Would it be more correct to use a real chi square | |
179 | // including the non diagonal term ???? | |
180 | Double_t chi2, chi2Max, diff, normDiff; | |
181 | chi2 = 0.0; | |
182 | chi2Max = 3.0; | |
183 | // coordinate in bending plane | |
30178c30 | 184 | diff = fBendingCoor - hitForRec->fBendingCoor; |
a9e2aefa | 185 | normDiff = diff * diff / |
30178c30 | 186 | (fBendingReso2 + hitForRec->fBendingReso2) / Sigma2Cut; |
a9e2aefa | 187 | if (normDiff > 1.0) return chi2Max; |
188 | chi2 = chi2 + normDiff; | |
189 | // coordinate in non bending plane | |
30178c30 | 190 | diff = fNonBendingCoor - hitForRec->fNonBendingCoor; |
a9e2aefa | 191 | normDiff = diff * diff / |
30178c30 | 192 | (fNonBendingReso2 + hitForRec->fNonBendingReso2) / Sigma2Cut; |
a9e2aefa | 193 | if (normDiff > 1.0) return chi2Max; |
194 | chi2 = chi2 + normDiff; | |
195 | return chi2; | |
196 | } |