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16bf9884 | 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 | #include "AliTRDmcTrack.h" | |
17 | #include "AliTRDgeometry.h" | |
18 | ||
19 | ClassImp(AliTRDmcTrack) | |
20 | ||
21 | //_____________________________________________________________________________ | |
22 | AliTRDmcTrack::AliTRDmcTrack() | |
23 | { | |
24 | ||
25 | // | |
26 | // Default constructor | |
27 | // | |
28 | ||
29 | fLab = -1; | |
30 | fPrimary = kFALSE; | |
31 | fMass = 0; | |
32 | fCharge = 0; | |
33 | fN = 0; | |
34 | ||
35 | for(Int_t i=0; i<200; i++) fIndex[i]=-1; | |
36 | ||
37 | for(Int_t i=0; i<6; i++) { | |
38 | for(Int_t j=0; j<3; j++) { | |
39 | Pin[i][j]=0.; | |
40 | Pout[i][j] = 0.; | |
41 | } | |
42 | } | |
43 | ||
44 | } | |
45 | ||
46 | //_____________________________________________________________________________ | |
47 | AliTRDmcTrack::AliTRDmcTrack(Int_t label, Bool_t primary, Float_t mass | |
48 | ,Int_t charge, Int_t pdg) | |
49 | { | |
50 | ||
51 | // | |
52 | // Main constructor | |
53 | // | |
54 | ||
55 | fLab = label; | |
56 | fPrimary = primary; | |
57 | fMass = mass; | |
58 | fCharge = charge; | |
59 | fPDG = pdg; | |
60 | fN = 0; | |
61 | ||
62 | for(Int_t i=0; i<200; i++) fIndex[i]=-1; | |
63 | ||
64 | for(Int_t i=0; i<6; i++) { | |
65 | for(Int_t j=0; j<3; j++) { | |
66 | Pin[i][j]=0.; | |
67 | Pout[i][j] = 0.; | |
68 | } | |
69 | } | |
70 | ||
71 | } | |
72 | ||
73 | //_____________________________________________________________________________ | |
74 | void AliTRDmcTrack::GetPxPyPz(Double_t& px, Double_t& py, Double_t& pz, | |
a3d851c2 | 75 | Int_t opt) const |
16bf9884 | 76 | { |
77 | // | |
78 | // Returns momentum components at the entrance (opt >= 0), or | |
79 | // exit (opt < 0) of TRD. | |
80 | // | |
81 | ||
82 | Int_t i; | |
83 | ||
84 | if(opt >= 0) { | |
85 | for(i = 0; i < AliTRDgeometry::Nplan(); i++) { | |
86 | if( Pin[i][0] * Pin[i][0] | |
87 | + Pin[i][1] * Pin[i][1] | |
88 | + Pin[i][2] * Pin[i][2] > 0.0005) break; | |
89 | } | |
90 | px = Pin[0][0]; py = Pin[0][1]; pz = Pin[0][2]; | |
91 | } | |
92 | else { | |
93 | for(i = AliTRDgeometry::Nplan() - 1; i >= 0; i--) { | |
94 | if( Pout[i][0] * Pout[i][0] | |
95 | + Pout[i][1] * Pout[i][1] | |
96 | + Pout[i][2] * Pout[i][2] > 0.0005) break; | |
97 | } | |
98 | px = Pout[i][0]; py = Pout[i][1]; pz = Pout[i][2]; | |
99 | } | |
100 | ||
101 | return; | |
102 | ||
103 | } | |
104 | ||
105 | //_____________________________________________________________________________ | |
106 | void AliTRDmcTrack::GetPlanePxPyPz(Double_t& px, Double_t& py, Double_t& pz, | |
a3d851c2 | 107 | Int_t plane, Int_t opt) const |
16bf9884 | 108 | { |
109 | // | |
110 | // Returns momentum components at the entrance (opt >= 0), or | |
111 | // exit (opt < 0) of TRD plane <plane>. | |
112 | // | |
113 | ||
114 | if(opt >= 0) { | |
115 | px = Pin[plane][0]; py = Pin[plane][1]; pz = Pin[plane][2]; | |
116 | } | |
117 | else { | |
118 | px = Pout[plane][0]; py = Pout[plane][1]; pz = Pout[plane][2]; | |
119 | } | |
120 | ||
121 | return; | |
122 | ||
123 | } |