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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 | |
d19b6003 | 18 | // ------------------------ |
19 | // Class AliMUONHitForRec | |
20 | // ------------------------ | |
a9e2aefa | 21 | // Hit for reconstruction in ALICE dimuon spectrometer |
d19b6003 | 22 | // Author: J. Gosset |
a9e2aefa | 23 | |
29fc2c86 | 24 | #include "AliTrackReference.h" |
a9e2aefa | 25 | #include "AliMUONHitForRec.h" |
a9e2aefa | 26 | #include "AliMUONRawCluster.h" |
27 | #include "AliMUONHit.h" | |
29fc2c86 | 28 | #include "AliMUONConstants.h" |
8c343c7c | 29 | #include "AliLog.h" |
a9e2aefa | 30 | |
31 | ClassImp(AliMUONHitForRec) // Class implementation in ROOT context | |
32 | ||
33 | //__________________________________________________________________________ | |
30178c30 | 34 | AliMUONHitForRec::AliMUONHitForRec() |
35 | : TObject() | |
36 | { | |
d19b6003 | 37 | /// Default Constructor |
30178c30 | 38 | |
39 | fFirstTrackHitPtr = 0; | |
40 | fLastTrackHitPtr = 0; | |
41 | } | |
42 | ||
43 | //__________________________________________________________________________ | |
29fc2c86 | 44 | AliMUONHitForRec::AliMUONHitForRec(AliTrackReference* theGhit) |
30178c30 | 45 | : TObject() |
a9e2aefa | 46 | { |
d19b6003 | 47 | /// Constructor for AliMUONHitForRec from a track ref. hit. |
48 | /// Fills the bending, non bending, and Z coordinates, | |
49 | /// which are taken from the coordinates of the track ref. hit, | |
50 | /// the track number (track ref. and not TH), | |
51 | /// and the chamber number (0...). | |
52 | ||
30178c30 | 53 | fBendingCoor = theGhit->Y(); |
54 | fNonBendingCoor = theGhit->X(); | |
55 | fZ = theGhit->Z(); | |
56 | // fTrack = theGhit->fTrack; ????????? | |
29fc2c86 | 57 | fChamberNumber = AliMUONConstants::ChamberNumber(fZ); |
38804330 | 58 | fDetElemId = 0; |
a9e2aefa | 59 | // other fields will be updated in |
29fc2c86 | 60 | // AliMUONEventReconstructor::NewHitForRecFromTrackRef, |
a9e2aefa | 61 | // except the following ones |
62 | fIndexOfFirstSegment = -1; | |
63 | fNSegments = 0; | |
64 | fFirstTrackHitPtr = fLastTrackHitPtr = NULL; | |
65 | fNTrackHits = 0; | |
66 | return; | |
67 | } | |
68 | ||
69 | // //__________________________________________________________________________ | |
70 | // AliMUONHitForRec::AliMUONHitForRec(AliMUONReconstHit* CathCorrel) | |
71 | // { | |
72 | // // Constructor for AliMUONHitForRec from a (cathode correlated) raw cluster. | |
73 | // // Fills the bending and non bending coordinates. | |
74 | // // Only the first correlation is taken into account. | |
75 | // // The bending coordinate is taken from the first cathode. | |
76 | // // The non bending coordinate is taken | |
77 | // // from the second cathode if it exists, | |
78 | // // from the first one otherwise. | |
79 | // fBendingCoor = CathCorrel->fY[3]; | |
80 | // if (CathCorrel->fCorrelIndex[0] >= 0) fNonBendingCoor = CathCorrel->fX[0]; | |
81 | // else fNonBendingCoor = CathCorrel->fX[3]; | |
82 | // return; | |
83 | // } | |
84 | ||
85 | //__________________________________________________________________________ | |
30178c30 | 86 | AliMUONHitForRec::AliMUONHitForRec(AliMUONRawCluster* theRawCluster) |
87 | : TObject() | |
a9e2aefa | 88 | { |
d19b6003 | 89 | /// Constructor for AliMUONHitForRec from a raw cluster. |
90 | /// Fills the bending and non bending coordinates. | |
91 | ||
30178c30 | 92 | fNonBendingCoor = theRawCluster->GetX(0); |
93 | fBendingCoor = theRawCluster->GetY(0); | |
7a773413 | 94 | fDetElemId = theRawCluster->GetDetElemId(); |
a9e2aefa | 95 | // other fields will be updated in |
96 | // AliMUONEventReconstructor::AddHitsForRecFromRawClusters, | |
97 | // except the following ones | |
29fc2c86 | 98 | fTTRTrack = -1; |
99 | fTrackRefSignal = -1; | |
a9e2aefa | 100 | fIndexOfFirstSegment = -1; |
101 | fNSegments = 0; | |
102 | fFirstTrackHitPtr = fLastTrackHitPtr = NULL; | |
103 | fNTrackHits = 0; | |
104 | return; | |
105 | } | |
106 | ||
30178c30 | 107 | //__________________________________________________________________________ |
b8dc484b | 108 | AliMUONHitForRec::AliMUONHitForRec (const AliMUONHitForRec& theMUONHitForRec) |
109 | : TObject(theMUONHitForRec) | |
a9e2aefa | 110 | { |
d19b6003 | 111 | /// Copy constructor |
112 | ||
b8dc484b | 113 | fBendingCoor = theMUONHitForRec.fBendingCoor; |
114 | fNonBendingCoor = theMUONHitForRec.fNonBendingCoor; | |
115 | fZ = theMUONHitForRec.fZ; | |
116 | fBendingReso2 = theMUONHitForRec.fBendingReso2; | |
117 | fNonBendingReso2 = theMUONHitForRec.fNonBendingReso2; | |
118 | fChamberNumber = theMUONHitForRec.fChamberNumber; | |
38804330 | 119 | fDetElemId = theMUONHitForRec.fDetElemId; |
b8dc484b | 120 | fHitNumber = theMUONHitForRec.fHitNumber; |
29fc2c86 | 121 | fTTRTrack = theMUONHitForRec.fTTRTrack; |
122 | fTrackRefSignal = theMUONHitForRec.fTrackRefSignal; | |
b8dc484b | 123 | fIndexOfFirstSegment = theMUONHitForRec.fIndexOfFirstSegment; |
124 | fNSegments = theMUONHitForRec.fNSegments; | |
125 | fFirstTrackHitPtr = theMUONHitForRec.fFirstTrackHitPtr; | |
126 | fLastTrackHitPtr = theMUONHitForRec.fLastTrackHitPtr; | |
127 | fNTrackHits = theMUONHitForRec.fNTrackHits; | |
a9e2aefa | 128 | } |
129 | ||
30178c30 | 130 | //__________________________________________________________________________ |
b8dc484b | 131 | AliMUONHitForRec & AliMUONHitForRec::operator=(const AliMUONHitForRec& theMUONHitForRec) |
a9e2aefa | 132 | { |
d19b6003 | 133 | /// Assignment operator |
134 | ||
b8dc484b | 135 | fBendingCoor = theMUONHitForRec.fBendingCoor; |
136 | fNonBendingCoor = theMUONHitForRec.fNonBendingCoor; | |
137 | fZ = theMUONHitForRec.fZ; | |
138 | fBendingReso2 = theMUONHitForRec.fBendingReso2; | |
139 | fNonBendingReso2 = theMUONHitForRec.fNonBendingReso2; | |
140 | fChamberNumber = theMUONHitForRec.fChamberNumber; | |
38804330 | 141 | fDetElemId = theMUONHitForRec.fDetElemId; |
b8dc484b | 142 | fHitNumber = theMUONHitForRec.fHitNumber; |
29fc2c86 | 143 | fTTRTrack = theMUONHitForRec.fTTRTrack; |
144 | fTrackRefSignal = theMUONHitForRec.fTrackRefSignal; | |
b8dc484b | 145 | fIndexOfFirstSegment = theMUONHitForRec.fIndexOfFirstSegment; |
146 | fNSegments = theMUONHitForRec.fNSegments; | |
147 | fFirstTrackHitPtr = theMUONHitForRec.fFirstTrackHitPtr; | |
148 | fLastTrackHitPtr = theMUONHitForRec.fLastTrackHitPtr; | |
149 | fNTrackHits = theMUONHitForRec.fNTrackHits; | |
b8dc484b | 150 | return *this; |
a9e2aefa | 151 | } |
a9e2aefa | 152 | //__________________________________________________________________________ |
83dbc640 | 153 | /*AZ |
2a941f4e | 154 | Int_t AliMUONHitForRec::Compare(const TObject* Hit) const |
a9e2aefa | 155 | { |
156 | // "Compare" function to sort with increasing chamber number. | |
157 | // Returns -1 (0, +1) if ChamberNumber of current HitForRec | |
158 | // is smaller than (equal to, larger than) ChamberNumber of Hit | |
159 | if (fChamberNumber < ((AliMUONHitForRec*)Hit)->fChamberNumber) return(-1); | |
160 | else if (fChamberNumber == ((AliMUONHitForRec*)Hit)->fChamberNumber) return( 0); | |
161 | else return(+1); | |
162 | } | |
83dbc640 | 163 | */ |
164 | //__________________________________________________________________________ | |
165 | Int_t AliMUONHitForRec::Compare(const TObject* Hit) const | |
166 | { | |
d19b6003 | 167 | /// "Compare" function to sort with decreasing Z-coordinate (spectro. MUON z<0). |
168 | /// Returns 1 (0, -1) if Z-coordinate of current HitForRec | |
169 | /// is smaller than (equal to, larger than) Z-coordinate of Hit | |
170 | ||
5b64e914 | 171 | if (fZ < ((AliMUONHitForRec*)Hit)->fZ) return(1); |
83dbc640 | 172 | else if (fZ == ((AliMUONHitForRec*)Hit)->fZ) return( 0); |
5b64e914 | 173 | else return(-1); |
83dbc640 | 174 | } |
a9e2aefa | 175 | |
176 | //__________________________________________________________________________ | |
30178c30 | 177 | Double_t AliMUONHitForRec::NormalizedChi2WithHitForRec(AliMUONHitForRec* hitForRec, Double_t Sigma2Cut) const |
a9e2aefa | 178 | { |
d19b6003 | 179 | /// Calculate the normalized Chi2 between the current hitForRec (this) |
180 | /// and the hitForRec pointed to by "hitForRec", | |
181 | /// i.e. the square deviations between the coordinates, | |
182 | /// in both the bending and the non bending plane, | |
183 | /// divided by the variance of the same quantities and by "Sigma2Cut". | |
184 | /// Returns 3 if none of the 2 quantities is OK, | |
185 | /// something smaller than or equal to 2 otherwise. | |
186 | /// Would it be more correct to use a real chi square | |
187 | /// including the non diagonal term ???? | |
188 | ||
a9e2aefa | 189 | Double_t chi2, chi2Max, diff, normDiff; |
190 | chi2 = 0.0; | |
191 | chi2Max = 3.0; | |
192 | // coordinate in bending plane | |
30178c30 | 193 | diff = fBendingCoor - hitForRec->fBendingCoor; |
a9e2aefa | 194 | normDiff = diff * diff / |
30178c30 | 195 | (fBendingReso2 + hitForRec->fBendingReso2) / Sigma2Cut; |
a9e2aefa | 196 | if (normDiff > 1.0) return chi2Max; |
197 | chi2 = chi2 + normDiff; | |
198 | // coordinate in non bending plane | |
30178c30 | 199 | diff = fNonBendingCoor - hitForRec->fNonBendingCoor; |
a9e2aefa | 200 | normDiff = diff * diff / |
30178c30 | 201 | (fNonBendingReso2 + hitForRec->fNonBendingReso2) / Sigma2Cut; |
a9e2aefa | 202 | if (normDiff > 1.0) return chi2Max; |
203 | chi2 = chi2 + normDiff; | |
204 | return chi2; | |
205 | } |