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