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2e6c5e43 | 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 | ||
27de2dfb | 16 | /* $Id$ */ |
2e6c5e43 | 17 | |
18 | /////////////////////////////////////////////////// | |
19 | // | |
20 | // Interface | |
21 | // for | |
22 | // MUON | |
23 | // track | |
24 | // extrapolation | |
25 | // | |
26 | /////////////////////////////////////////////////// | |
27 | ||
28 | #include "AliPWG3TrackExtrapInterface.h" | |
29 | #include "AliMUONTrackExtrap.h" | |
30 | #include "AliESDMuonTrack.h" | |
31 | #include "AliMUONTrackParam.h" | |
32 | #include "AliMagF.h" | |
33 | ||
34 | #include <Riostream.h> | |
35 | #include <TGeoManager.h> | |
36 | ||
37 | /// \cond CLASSIMP | |
38 | ClassImp(AliPWG3TrackExtrapInterface) // Class implementation in ROOT context | |
39 | /// \endcond | |
40 | ||
41 | //__________________________________________________________________________ | |
42 | void AliPWG3TrackExtrapInterface::SetMagField(const AliMagF* magField) | |
43 | { | |
44 | /// Set the magnetic field (required for track extrapolation) | |
45 | ||
46 | AliMUONTrackExtrap::SetField(magField); | |
47 | ||
48 | } | |
49 | ||
50 | //__________________________________________________________________________ | |
51 | Bool_t AliPWG3TrackExtrapInterface::SetGeometry(const char* fileName) | |
52 | { | |
53 | /// Set the geometry (required for absorber correction) | |
54 | ||
55 | if (!gGeoManager) { | |
56 | TGeoManager::Import(fileName); | |
57 | if (!gGeoManager) { | |
58 | cout<<"E-AliPWG3TrackExtrapInterface::ImportGeo: getting geometry from file "<<fileName<<" failed"<<endl; | |
59 | return kFALSE; | |
60 | } | |
61 | } | |
62 | return kTRUE; | |
63 | ||
64 | } | |
65 | ||
66 | //__________________________________________________________________________ | |
67 | void AliPWG3TrackExtrapInterface::ExtrapToVertexUncorrected(AliESDMuonTrack* muonTrack, Double_t zVtx) | |
68 | { | |
69 | /// Extrapolation to the vertex (at the z position "zVtx") without Branson and energy loss corrections. | |
70 | /// Returns the extrapolated track parameters in the current ESDMuonTrack. | |
71 | ||
72 | AliMUONTrackParam trackParam; | |
73 | trackParam.GetParamFromUncorrected(*muonTrack); | |
74 | // dummy vertex transverse position (not used anyway) | |
75 | Double_t xVtx = 0.; | |
76 | Double_t yVtx = 0.; | |
77 | AliMUONTrackExtrap::ExtrapToVertex(&trackParam, xVtx, yVtx, zVtx, kFALSE, kFALSE); | |
78 | trackParam.SetParamFor(*muonTrack); | |
79 | ||
80 | } | |
81 | ||
82 | //__________________________________________________________________________ | |
83 | void AliPWG3TrackExtrapInterface::ExtrapToVertexWithELoss(AliESDMuonTrack* muonTrack, Double_t zVtx) | |
84 | { | |
85 | /// Extrapolation to the vertex (at the z position "zVtx") with energy loss correction only. | |
86 | /// Returns the extrapolated track parameters in the current ESDMuonTrack. | |
87 | ||
88 | AliMUONTrackParam trackParam; | |
89 | trackParam.GetParamFromUncorrected(*muonTrack); | |
90 | // compute energy loss correction assuming linear propagation | |
91 | Double_t xVtx = trackParam.GetNonBendingCoor() + (zVtx - trackParam.GetZ()) * trackParam.GetNonBendingSlope(); | |
92 | Double_t yVtx = trackParam.GetBendingCoor() + (zVtx - trackParam.GetZ()) * trackParam.GetBendingSlope(); | |
93 | AliMUONTrackExtrap::ExtrapToVertex(&trackParam, xVtx, yVtx, zVtx, kFALSE, kTRUE); | |
94 | trackParam.SetParamFor(*muonTrack); | |
95 | ||
96 | } | |
97 | ||
98 | //__________________________________________________________________________ | |
99 | void AliPWG3TrackExtrapInterface::ExtrapToVertexWithBranson(AliESDMuonTrack* muonTrack, Double_t vtx[3]) | |
100 | { | |
101 | /// Extrapolation to the vertex (at the z position "zVtx") with Branson correction only. | |
102 | /// Returns the extrapolated track parameters in the current ESDMuonTrack. | |
103 | ||
104 | AliMUONTrackParam trackParam; | |
105 | trackParam.GetParamFromUncorrected(*muonTrack); | |
106 | AliMUONTrackExtrap::ExtrapToVertex(&trackParam, vtx[0], vtx[1], vtx[2], kTRUE, kFALSE); | |
107 | trackParam.SetParamFor(*muonTrack); | |
108 | ||
109 | } | |
110 | ||
111 | //__________________________________________________________________________ | |
112 | void AliPWG3TrackExtrapInterface::ExtrapToVertex(AliESDMuonTrack* muonTrack, Double_t vtx[3]) | |
113 | { | |
114 | /// Extrapolation to the vertex (at the z position "zVtx") with Branson and energy loss corrections. | |
115 | /// Returns the extrapolated track parameters in the current ESDMuonTrack. | |
116 | ||
117 | AliMUONTrackParam trackParam; | |
118 | trackParam.GetParamFromUncorrected(*muonTrack); | |
119 | AliMUONTrackExtrap::ExtrapToVertex(&trackParam, vtx[0], vtx[1], vtx[2], kTRUE, kTRUE); | |
120 | trackParam.SetParamFor(*muonTrack); | |
121 | ||
122 | } | |
123 | ||
124 | //__________________________________________________________________________ | |
125 | Double_t AliPWG3TrackExtrapInterface::TotalMomentumEnergyLoss(AliESDMuonTrack* muonTrack, Double_t zVtx) | |
126 | { | |
127 | /// Calculate the total momentum energy loss in-between the track position and the vertex assuming a linear propagation | |
128 | AliMUONTrackParam trackParam; | |
129 | trackParam.GetParamFromUncorrected(*muonTrack); | |
130 | Double_t xVtx = trackParam.GetNonBendingCoor() + (zVtx - trackParam.GetZ()) * trackParam.GetNonBendingSlope(); | |
131 | Double_t yVtx = trackParam.GetBendingCoor() + (zVtx - trackParam.GetZ()) * trackParam.GetBendingSlope(); | |
132 | return AliMUONTrackExtrap::TotalMomentumEnergyLoss(&trackParam, xVtx, yVtx, zVtx); | |
133 | } | |
134 | ||
135 | //__________________________________________________________________________ | |
136 | Double_t AliPWG3TrackExtrapInterface::TotalMomentumEnergyLoss(AliESDMuonTrack* muonTrack, Double_t vtx[3]) | |
137 | { | |
138 | /// Calculate the total momentum energy loss in-between the track position and the vertex assuming a linear propagation | |
139 | AliMUONTrackParam trackParam; | |
140 | trackParam.GetParamFromUncorrected(*muonTrack); | |
141 | return AliMUONTrackExtrap::TotalMomentumEnergyLoss(&trackParam, vtx[0], vtx[1], vtx[2]); | |
142 | } | |
143 |