| Geant4 Cross Reference |
1 // 1
2 // *******************************************
3 // * License and Disclaimer
4 // *
5 // * The Geant4 software is copyright of th
6 // * the Geant4 Collaboration. It is provided
7 // * conditions of the Geant4 Software License
8 // * LICENSE and available at http://cern.ch/
9 // * include a list of copyright holders.
10 // *
11 // * Neither the authors of this software syst
12 // * institutes,nor the agencies providing fin
13 // * work make any representation or warran
14 // * regarding this software system or assum
15 // * use. Please see the license in the file
16 // * for the full disclaimer and the limitatio
17 // *
18 // * This code implementation is the result
19 // * technical work of the GEANT4 collaboratio
20 // * By using, copying, modifying or distri
21 // * any work based on the software) you ag
22 // * use in resulting scientific publicati
23 // * acceptance of all terms of the Geant4 Sof
24 // *******************************************
25 //
26 //
27 // -------------------------------------------
28 // GEANT 4 class implementation file
29 // -------------------------------------------
30 //
31
32 #include "G4ErrorFreeTrajParam.hh"
33 #include "G4ThreeVector.hh"
34 #include "G4SystemOfUnits.hh"
35
36 #include <iomanip>
37
38 //--------------------------------------------
39 G4ErrorFreeTrajParam::G4ErrorFreeTrajParam(con
40 con
41 {
42 SetParameters(pos, mom);
43 }
44
45 //--------------------------------------------
46 void G4ErrorFreeTrajParam::SetParameters(const
47 const
48 {
49 fInvP = 1. / mom.mag();
50 fDir = mom * fInvP;
51 fLambda = 90. * deg - mom.theta();
52 fPhi = mom.phi();
53 G4Vector3D vxPerp(0., 0., 0.);
54 if(mom.mag() > 0.)
55 {
56 vxPerp = mom / mom.mag();
57 }
58 G4Vector3D vyPerp = G4Vector3D(-vxPerp.y(),
59 vyPerp /= vyPerp.mag();
60 G4Vector3D vzPerp = vxPerp.cross(vyPerp);
61 vzPerp /= vzPerp.mag();
62 // check if right handed
63 // fXPerp = pos.proj( mom );
64 G4ThreeVector posv(pos);
65 if(vyPerp.mag() != 0.)
66 {
67 // now all 2 scalar memeber variables reta
68 // fYPerp = posv.project( vyPerp ).mag();
69 // fZPerp = posv.project( vzPerp ).mag();
70 fYPerp = posv.dot(vyPerp);
71 fZPerp = posv.dot(vzPerp);
72 }
73 else
74 {
75 fYPerp = 0.;
76 fZPerp = 0.;
77 }
78 }
79
80 //--------------------------------------------
81 void G4ErrorFreeTrajParam::Update(const G4Trac
82 {
83 SetParameters(aTrack->GetPosition(), aTrack-
84 }
85
86 //--------------------------------------------
87 std::ostream& operator<<(std::ostream& out, co
88 {
89 G4long oldprc = out.precision(8);
90 out << " InvP= " << tp.fInvP << " Theta= " <
91 << " Phi= " << tp.fPhi << " YPerp= " <<
92 << " ZPerp= " << tp.fZPerp << G4endl;
93 out << " momentum direction= " << tp.fDir <<
94 out.precision(oldprc);
95
96 return out;
97 }
98