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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 | ||
16 | /* | |
17 | $Log$ | |
2a941f4e | 18 | Revision 1.5 2001/01/26 21:46:33 morsch |
19 | Use access functions to MUONHit, ... data members. | |
20 | ||
e819fbd3 | 21 | Revision 1.4 2000/10/02 21:28:09 fca |
22 | Removal of useless dependecies via forward declarations | |
23 | ||
94de3818 | 24 | Revision 1.3 2000/06/25 13:06:39 hristov |
25 | Inline functions moved from *.cxx to *.h files instead of forward declarations | |
26 | ||
9b03f36b | 27 | Revision 1.2 2000/06/15 07:58:48 morsch |
28 | Code from MUON-dev joined | |
29 | ||
a9e2aefa | 30 | Revision 1.1.2.4 2000/06/12 10:11:10 morsch |
31 | Dummy copy constructor and assignment operator added | |
32 | ||
33 | Revision 1.1.2.3 2000/06/09 22:14:43 morsch | |
34 | Make includes consistent with new file naming. | |
35 | ||
36 | Revision 1.1.2.2 2000/06/09 12:58:05 gosset | |
37 | Removed comment beginnings in Log sections of .cxx files | |
38 | Suppressed most violations of coding rules | |
39 | ||
40 | Revision 1.1.2.1 2000/06/07 14:44:53 gosset | |
41 | Addition of files for track reconstruction in C++ | |
42 | */ | |
43 | ||
44 | //__________________________________________________________________________ | |
45 | // | |
46 | // Hit for reconstruction in ALICE dimuon spectrometer | |
47 | //__________________________________________________________________________ | |
48 | ||
49 | #include "AliMUONHitForRec.h" | |
50 | #include "AliMUONTrackParam.h" | |
51 | #include "AliMUONRawCluster.h" | |
52 | #include "AliMUONHit.h" | |
53 | ||
54 | ClassImp(AliMUONHitForRec) // Class implementation in ROOT context | |
55 | ||
56 | //__________________________________________________________________________ | |
57 | AliMUONHitForRec::AliMUONHitForRec(AliMUONHit* Ghit) | |
58 | { | |
59 | // Constructor for AliMUONHitForRec from a GEANT hit. | |
60 | // Fills the bending, non bending, and Z coordinates, | |
61 | // which are taken from the coordinates of the GEANT hit, | |
62 | // the track number (GEANT and not TH), | |
63 | // and the chamber number (0...). | |
94de3818 | 64 | fBendingCoor = Ghit->Y(); |
65 | fNonBendingCoor = Ghit->X(); | |
66 | fZ = Ghit->Z(); | |
a9e2aefa | 67 | // fTrack = Ghit->fTrack; ????????? |
e819fbd3 | 68 | fChamberNumber = Ghit->Chamber() - 1; |
a9e2aefa | 69 | // other fields will be updated in |
70 | // AliMUONEventReconstructor::NewHitForRecFromGEANT, | |
71 | // except the following ones | |
72 | fIndexOfFirstSegment = -1; | |
73 | fNSegments = 0; | |
74 | fFirstTrackHitPtr = fLastTrackHitPtr = NULL; | |
75 | fNTrackHits = 0; | |
76 | return; | |
77 | } | |
78 | ||
79 | // //__________________________________________________________________________ | |
80 | // AliMUONHitForRec::AliMUONHitForRec(AliMUONReconstHit* CathCorrel) | |
81 | // { | |
82 | // // Constructor for AliMUONHitForRec from a (cathode correlated) raw cluster. | |
83 | // // Fills the bending and non bending coordinates. | |
84 | // // Only the first correlation is taken into account. | |
85 | // // The bending coordinate is taken from the first cathode. | |
86 | // // The non bending coordinate is taken | |
87 | // // from the second cathode if it exists, | |
88 | // // from the first one otherwise. | |
89 | // fBendingCoor = CathCorrel->fY[3]; | |
90 | // if (CathCorrel->fCorrelIndex[0] >= 0) fNonBendingCoor = CathCorrel->fX[0]; | |
91 | // else fNonBendingCoor = CathCorrel->fX[3]; | |
92 | // return; | |
93 | // } | |
94 | ||
95 | //__________________________________________________________________________ | |
96 | AliMUONHitForRec::AliMUONHitForRec(AliMUONRawCluster* RawCluster) | |
97 | { | |
98 | // Constructor for AliMUONHitForRec from a raw cluster. | |
99 | // Fills the bending and non bending coordinates. | |
100 | fNonBendingCoor = RawCluster->fX[0]; | |
101 | fBendingCoor = RawCluster->fY[0]; | |
102 | // other fields will be updated in | |
103 | // AliMUONEventReconstructor::AddHitsForRecFromRawClusters, | |
104 | // except the following ones | |
105 | fTHTrack = -1; | |
106 | fGeantSignal = -1; | |
107 | fIndexOfFirstSegment = -1; | |
108 | fNSegments = 0; | |
109 | fFirstTrackHitPtr = fLastTrackHitPtr = NULL; | |
110 | fNTrackHits = 0; | |
111 | return; | |
112 | } | |
113 | ||
114 | AliMUONHitForRec::AliMUONHitForRec (const AliMUONHitForRec& MUONHitForRec) | |
115 | { | |
116 | // Dummy copy constructor | |
117 | } | |
118 | ||
119 | AliMUONHitForRec & AliMUONHitForRec::operator=(const AliMUONHitForRec& MUONHitForRec) | |
120 | { | |
121 | // Dummy assignment operator | |
122 | return *this; | |
123 | } | |
a9e2aefa | 124 | //__________________________________________________________________________ |
2a941f4e | 125 | Int_t AliMUONHitForRec::Compare(const TObject* Hit) const |
a9e2aefa | 126 | { |
127 | // "Compare" function to sort with increasing chamber number. | |
128 | // Returns -1 (0, +1) if ChamberNumber of current HitForRec | |
129 | // is smaller than (equal to, larger than) ChamberNumber of Hit | |
130 | if (fChamberNumber < ((AliMUONHitForRec*)Hit)->fChamberNumber) return(-1); | |
131 | else if (fChamberNumber == ((AliMUONHitForRec*)Hit)->fChamberNumber) return( 0); | |
132 | else return(+1); | |
133 | } | |
134 | ||
135 | //__________________________________________________________________________ | |
136 | Double_t AliMUONHitForRec::NormalizedChi2WithHitForRec(AliMUONHitForRec* HitForRec, Double_t Sigma2Cut) | |
137 | { | |
138 | // Calculate the normalized Chi2 between the current HitForRec (this) | |
139 | // and the HitForRec pointed to by "HitForRec", | |
140 | // i.e. the square deviations between the coordinates, | |
141 | // in both the bending and the non bending plane, | |
142 | // divided by the variance of the same quantities and by "Sigma2Cut". | |
143 | // Returns 3 if none of the 2 quantities is OK, | |
144 | // something smaller than or equal to 2 otherwise. | |
145 | // Would it be more correct to use a real chi square | |
146 | // including the non diagonal term ???? | |
147 | Double_t chi2, chi2Max, diff, normDiff; | |
148 | chi2 = 0.0; | |
149 | chi2Max = 3.0; | |
150 | // coordinate in bending plane | |
151 | diff = this->fBendingCoor - HitForRec->fBendingCoor; | |
152 | normDiff = diff * diff / | |
153 | (this->fBendingReso2 + HitForRec->fBendingReso2) / Sigma2Cut; | |
154 | if (normDiff > 1.0) return chi2Max; | |
155 | chi2 = chi2 + normDiff; | |
156 | // coordinate in non bending plane | |
157 | diff = this->fNonBendingCoor - HitForRec->fNonBendingCoor; | |
158 | normDiff = diff * diff / | |
159 | (this->fNonBendingReso2 + HitForRec->fNonBendingReso2) / Sigma2Cut; | |
160 | if (normDiff > 1.0) return chi2Max; | |
161 | chi2 = chi2 + normDiff; | |
162 | return chi2; | |
163 | } |