| [815] | 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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| [1058] | 27 | // GEANT4 tag $Name: geant4-09-02-ref-02 $
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| [815] | 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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