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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); |
a9e2aefa | 56 | // other fields will be updated in |
29fc2c86 | 57 | // AliMUONEventReconstructor::NewHitForRecFromTrackRef, |
a9e2aefa | 58 | // except the following ones |
59 | fIndexOfFirstSegment = -1; | |
60 | fNSegments = 0; | |
61 | fFirstTrackHitPtr = fLastTrackHitPtr = NULL; | |
62 | fNTrackHits = 0; | |
63 | return; | |
64 | } | |
65 | ||
66 | // //__________________________________________________________________________ | |
67 | // AliMUONHitForRec::AliMUONHitForRec(AliMUONReconstHit* CathCorrel) | |
68 | // { | |
69 | // // Constructor for AliMUONHitForRec from a (cathode correlated) raw cluster. | |
70 | // // Fills the bending and non bending coordinates. | |
71 | // // Only the first correlation is taken into account. | |
72 | // // The bending coordinate is taken from the first cathode. | |
73 | // // The non bending coordinate is taken | |
74 | // // from the second cathode if it exists, | |
75 | // // from the first one otherwise. | |
76 | // fBendingCoor = CathCorrel->fY[3]; | |
77 | // if (CathCorrel->fCorrelIndex[0] >= 0) fNonBendingCoor = CathCorrel->fX[0]; | |
78 | // else fNonBendingCoor = CathCorrel->fX[3]; | |
79 | // return; | |
80 | // } | |
81 | ||
82 | //__________________________________________________________________________ | |
30178c30 | 83 | AliMUONHitForRec::AliMUONHitForRec(AliMUONRawCluster* theRawCluster) |
84 | : TObject() | |
a9e2aefa | 85 | { |
86 | // Constructor for AliMUONHitForRec from a raw cluster. | |
87 | // Fills the bending and non bending coordinates. | |
30178c30 | 88 | fNonBendingCoor = theRawCluster->GetX(0); |
89 | fBendingCoor = theRawCluster->GetY(0); | |
a9e2aefa | 90 | // other fields will be updated in |
91 | // AliMUONEventReconstructor::AddHitsForRecFromRawClusters, | |
92 | // except the following ones | |
29fc2c86 | 93 | fTTRTrack = -1; |
94 | fTrackRefSignal = -1; | |
a9e2aefa | 95 | fIndexOfFirstSegment = -1; |
96 | fNSegments = 0; | |
97 | fFirstTrackHitPtr = fLastTrackHitPtr = NULL; | |
98 | fNTrackHits = 0; | |
99 | return; | |
100 | } | |
101 | ||
30178c30 | 102 | //__________________________________________________________________________ |
b8dc484b | 103 | AliMUONHitForRec::AliMUONHitForRec (const AliMUONHitForRec& theMUONHitForRec) |
104 | : TObject(theMUONHitForRec) | |
a9e2aefa | 105 | { |
b8dc484b | 106 | fBendingCoor = theMUONHitForRec.fBendingCoor; |
107 | fNonBendingCoor = theMUONHitForRec.fNonBendingCoor; | |
108 | fZ = theMUONHitForRec.fZ; | |
109 | fBendingReso2 = theMUONHitForRec.fBendingReso2; | |
110 | fNonBendingReso2 = theMUONHitForRec.fNonBendingReso2; | |
111 | fChamberNumber = theMUONHitForRec.fChamberNumber; | |
112 | fHitNumber = theMUONHitForRec.fHitNumber; | |
29fc2c86 | 113 | fTTRTrack = theMUONHitForRec.fTTRTrack; |
114 | fTrackRefSignal = theMUONHitForRec.fTrackRefSignal; | |
b8dc484b | 115 | fIndexOfFirstSegment = theMUONHitForRec.fIndexOfFirstSegment; |
116 | fNSegments = theMUONHitForRec.fNSegments; | |
117 | fFirstTrackHitPtr = theMUONHitForRec.fFirstTrackHitPtr; | |
118 | fLastTrackHitPtr = theMUONHitForRec.fLastTrackHitPtr; | |
119 | fNTrackHits = theMUONHitForRec.fNTrackHits; | |
30178c30 | 120 | |
a9e2aefa | 121 | } |
122 | ||
30178c30 | 123 | //__________________________________________________________________________ |
b8dc484b | 124 | AliMUONHitForRec & AliMUONHitForRec::operator=(const AliMUONHitForRec& theMUONHitForRec) |
a9e2aefa | 125 | { |
b8dc484b | 126 | fBendingCoor = theMUONHitForRec.fBendingCoor; |
127 | fNonBendingCoor = theMUONHitForRec.fNonBendingCoor; | |
128 | fZ = theMUONHitForRec.fZ; | |
129 | fBendingReso2 = theMUONHitForRec.fBendingReso2; | |
130 | fNonBendingReso2 = theMUONHitForRec.fNonBendingReso2; | |
131 | fChamberNumber = theMUONHitForRec.fChamberNumber; | |
132 | fHitNumber = theMUONHitForRec.fHitNumber; | |
29fc2c86 | 133 | fTTRTrack = theMUONHitForRec.fTTRTrack; |
134 | fTrackRefSignal = theMUONHitForRec.fTrackRefSignal; | |
b8dc484b | 135 | fIndexOfFirstSegment = theMUONHitForRec.fIndexOfFirstSegment; |
136 | fNSegments = theMUONHitForRec.fNSegments; | |
137 | fFirstTrackHitPtr = theMUONHitForRec.fFirstTrackHitPtr; | |
138 | fLastTrackHitPtr = theMUONHitForRec.fLastTrackHitPtr; | |
139 | fNTrackHits = theMUONHitForRec.fNTrackHits; | |
30178c30 | 140 | |
b8dc484b | 141 | return *this; |
a9e2aefa | 142 | } |
a9e2aefa | 143 | //__________________________________________________________________________ |
83dbc640 | 144 | /*AZ |
2a941f4e | 145 | Int_t AliMUONHitForRec::Compare(const TObject* Hit) const |
a9e2aefa | 146 | { |
147 | // "Compare" function to sort with increasing chamber number. | |
148 | // Returns -1 (0, +1) if ChamberNumber of current HitForRec | |
149 | // is smaller than (equal to, larger than) ChamberNumber of Hit | |
150 | if (fChamberNumber < ((AliMUONHitForRec*)Hit)->fChamberNumber) return(-1); | |
151 | else if (fChamberNumber == ((AliMUONHitForRec*)Hit)->fChamberNumber) return( 0); | |
152 | else return(+1); | |
153 | } | |
83dbc640 | 154 | */ |
155 | //__________________________________________________________________________ | |
156 | Int_t AliMUONHitForRec::Compare(const TObject* Hit) const | |
157 | { | |
5b64e914 | 158 | // "Compare" function to sort with decreasing Z-coordinate (spectro. MUON z<0). |
159 | // Returns 1 (0, -1) if Z-coordinate of current HitForRec | |
83dbc640 | 160 | // is smaller than (equal to, larger than) Z-coordinate of Hit |
5b64e914 | 161 | if (fZ < ((AliMUONHitForRec*)Hit)->fZ) return(1); |
83dbc640 | 162 | else if (fZ == ((AliMUONHitForRec*)Hit)->fZ) return( 0); |
5b64e914 | 163 | else return(-1); |
83dbc640 | 164 | } |
a9e2aefa | 165 | |
166 | //__________________________________________________________________________ | |
30178c30 | 167 | Double_t AliMUONHitForRec::NormalizedChi2WithHitForRec(AliMUONHitForRec* hitForRec, Double_t Sigma2Cut) const |
a9e2aefa | 168 | { |
30178c30 | 169 | // Calculate the normalized Chi2 between the current hitForRec (this) |
170 | // and the hitForRec pointed to by "hitForRec", | |
a9e2aefa | 171 | // i.e. the square deviations between the coordinates, |
172 | // in both the bending and the non bending plane, | |
173 | // divided by the variance of the same quantities and by "Sigma2Cut". | |
174 | // Returns 3 if none of the 2 quantities is OK, | |
175 | // something smaller than or equal to 2 otherwise. | |
176 | // Would it be more correct to use a real chi square | |
177 | // including the non diagonal term ???? | |
178 | Double_t chi2, chi2Max, diff, normDiff; | |
179 | chi2 = 0.0; | |
180 | chi2Max = 3.0; | |
181 | // coordinate in bending plane | |
30178c30 | 182 | diff = fBendingCoor - hitForRec->fBendingCoor; |
a9e2aefa | 183 | normDiff = diff * diff / |
30178c30 | 184 | (fBendingReso2 + hitForRec->fBendingReso2) / Sigma2Cut; |
a9e2aefa | 185 | if (normDiff > 1.0) return chi2Max; |
186 | chi2 = chi2 + normDiff; | |
187 | // coordinate in non bending plane | |
30178c30 | 188 | diff = fNonBendingCoor - hitForRec->fNonBendingCoor; |
a9e2aefa | 189 | normDiff = diff * diff / |
30178c30 | 190 | (fNonBendingReso2 + hitForRec->fNonBendingReso2) / Sigma2Cut; |
a9e2aefa | 191 | if (normDiff > 1.0) return chi2Max; |
192 | chi2 = chi2 + normDiff; | |
193 | return chi2; | |
194 | } |