1 | // |
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2 | // ******************************************************************** |
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3 | // * License and Disclaimer * |
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4 | // * * |
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5 | // * The Geant4 software is copyright of the Copyright Holders of * |
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6 | // * the Geant4 Collaboration. It is provided under the terms and * |
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7 | // * conditions of the Geant4 Software License, included in the file * |
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8 | // * LICENSE and available at http://cern.ch/geant4/license . These * |
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9 | // * include a list of copyright holders. * |
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10 | // * * |
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11 | // * Neither the authors of this software system, nor their employing * |
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12 | // * institutes,nor the agencies providing financial support for this * |
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13 | // * work make any representation or warranty, express or implied, * |
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14 | // * regarding this software system or assume any liability for its * |
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15 | // * use. Please see the license in the file LICENSE and URL above * |
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16 | // * for the full disclaimer and the limitation of liability. * |
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17 | // * * |
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18 | // * This code implementation is the result of the scientific and * |
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19 | // * technical work of the GEANT4 collaboration. * |
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20 | // * By using, copying, modifying or distributing the software (or * |
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21 | // * any work based on the software) you agree to acknowledge its * |
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22 | // * use in resulting scientific publications, and indicate your * |
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23 | // * acceptance of all terms of the Geant4 Software license. * |
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24 | // ******************************************************************** |
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25 | // |
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26 | // $Id: G4ErrorFreeTrajParam.cc,v 1.3 2007/09/24 16:24:45 arce Exp $ |
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27 | // GEANT4 tag $Name: geant4-09-03 $ |
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28 | // |
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29 | // ------------------------------------------------------------ |
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30 | // GEANT 4 class implementation file |
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31 | // ------------------------------------------------------------ |
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32 | // |
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33 | |
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34 | #include "G4ErrorFreeTrajParam.hh" |
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35 | #include "G4ThreeVector.hh" |
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36 | |
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37 | #include <iomanip> |
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38 | |
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39 | //------------------------------------------------------------------------ |
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40 | G4ErrorFreeTrajParam::G4ErrorFreeTrajParam( const G4Point3D& pos, |
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41 | const G4Vector3D& mom ) |
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42 | { |
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43 | SetParameters( pos, mom ); |
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44 | } |
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45 | |
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46 | |
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47 | //------------------------------------------------------------------------ |
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48 | void G4ErrorFreeTrajParam::SetParameters( const G4Point3D& pos, |
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49 | const G4Vector3D& mom ) |
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50 | { |
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51 | fDir = mom; |
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52 | fInvP = 1./mom.mag(); |
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53 | fLambda = 90.*deg - mom.theta(); |
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54 | fPhi = mom.phi(); |
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55 | G4Vector3D vxPerp(0.,0.,0.); |
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56 | if( mom.mag() > 0.) { |
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57 | vxPerp = mom/mom.mag(); |
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58 | } |
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59 | G4Vector3D vyPerp = G4Vector3D( -vxPerp.y(), vxPerp.x(), 0.); |
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60 | vyPerp /= vyPerp.mag(); |
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61 | G4Vector3D vzPerp = vxPerp.cross( vyPerp ); |
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62 | vzPerp /= vzPerp.mag(); |
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63 | // check if right handed |
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64 | // fXPerp = pos.proj( mom ); |
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65 | G4ThreeVector posv(pos); |
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66 | if( vyPerp.mag() != 0. ) { |
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67 | fYPerp = posv.project( vyPerp ).mag(); |
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68 | fZPerp = posv.project( vzPerp ).mag(); |
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69 | } else { |
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70 | fYPerp = 0.; |
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71 | fZPerp = 0.; |
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72 | } |
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73 | } |
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74 | |
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75 | //------------------------------------------------------------------------ |
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76 | void G4ErrorFreeTrajParam::Update( const G4Track* aTrack ) |
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77 | { |
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78 | SetParameters( aTrack->GetPosition(), aTrack->GetMomentum() ); |
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79 | |
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80 | } |
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81 | |
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82 | |
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83 | //------------------------------------------------------------------------ |
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84 | std::ostream& operator<<(std::ostream& out, const G4ErrorFreeTrajParam& tp) |
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85 | { |
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86 | // long mode = out.setf(std::ios::fixed,std::ios::floatfield); |
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87 | |
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88 | // out << tp.theType; |
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89 | // out << std::setprecision(5) << std::setw(10); |
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90 | out << std::setprecision(8) << " InvP= " << tp.fInvP << " Theta= " |
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91 | << tp.fLambda << " Phi= " << tp.fPhi << " YPerp= " << tp.fYPerp |
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92 | << " ZPerp= " << tp.fZPerp << G4endl; |
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93 | out << " momentum direction= " << tp.fDir << G4endl; |
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94 | |
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95 | return out; |
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96 | } |
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