[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 | // |
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| 27 | // $Id: G4ErrorFreeTrajState.hh,v 1.4 2007/05/31 20:27:06 arce Exp $ |
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[1058] | 28 | // GEANT4 tag $Name: geant4-09-02-ref-02 $ |
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[815] | 29 | // |
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| 30 | // Class Description: |
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| 31 | // |
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| 32 | // Represents a free G4ErrorTrajState |
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| 33 | // It can be represented by the 5 variables |
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| 34 | // 1/p, lambda, phi, y_perp, z_perp |
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| 35 | // where lambda and phi are the dip and azimuthal angles related |
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| 36 | // to the momentum components in the following way: |
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| 37 | // p_x = p cos(lambda) cos(phi) ! lambda = 90 - theta |
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| 38 | // p_y = p cos(lambda) sin(phi) |
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| 39 | // p_z = p sin(lambda) |
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| 40 | // y_perp and z_perp are the coordinates of the trajectory in a |
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| 41 | // local orthonormal reference frame with the x_perp axis along the |
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| 42 | // particle direction, the y_perp being parallel to the x-y plane. |
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| 43 | // |
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| 44 | // This class also takes care of propagating the error associated to |
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| 45 | // the trajectory |
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| 46 | |
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| 47 | // History: |
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| 48 | // - Created: P. Arce |
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| 49 | // -------------------------------------------------------------------- |
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| 50 | |
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| 51 | #ifndef G4ErrorFreeTrajState_hh |
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| 52 | #define G4ErrorFreeTrajState_hh |
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| 53 | |
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| 54 | #include "globals.hh" |
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| 55 | |
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| 56 | #include "G4ErrorMatrix.hh" |
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| 57 | |
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| 58 | #include "G4ErrorTrajState.hh" |
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| 59 | #include "G4ErrorFreeTrajParam.hh" |
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| 60 | |
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| 61 | #include "G4Point3D.hh" |
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| 62 | #include "G4Vector3D.hh" |
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| 63 | |
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| 64 | class G4ErrorSurfaceTrajState; |
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| 65 | |
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| 66 | class G4ErrorFreeTrajState : public G4ErrorTrajState |
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| 67 | { |
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| 68 | public: // with description |
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| 69 | |
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| 70 | G4ErrorFreeTrajState(){} |
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| 71 | G4ErrorFreeTrajState( const G4String& partType, |
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| 72 | const G4Point3D& pos, |
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| 73 | const G4Vector3D& mom, |
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| 74 | const G4ErrorTrajErr& errmat = G4ErrorTrajErr(5,0) ); |
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| 75 | // Constructor by providing particle, position and momentum |
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| 76 | |
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| 77 | G4ErrorFreeTrajState( const G4ErrorSurfaceTrajState& tpOS ); |
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| 78 | // Constructor by providing G4ErrorSurfaceTrajState |
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| 79 | |
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| 80 | ~G4ErrorFreeTrajState(){} |
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| 81 | |
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| 82 | virtual G4int Update( const G4Track* aTrack ); |
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| 83 | // update parameters from G4Track |
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| 84 | |
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| 85 | virtual G4int PropagateError( const G4Track* aTrack ); |
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| 86 | // propagate the error along the step |
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| 87 | |
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| 88 | virtual void Dump( std::ostream& out = G4cout ) const; |
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| 89 | // dump TrajState parameters |
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| 90 | |
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| 91 | friend |
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| 92 | std::ostream& operator<<(std::ostream&, const G4ErrorFreeTrajState& ts); |
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| 93 | |
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| 94 | // Set and Get methods |
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| 95 | |
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| 96 | virtual void SetPosition( const G4Point3D pos ) |
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| 97 | { SetParameters( pos, fMomentum ); } |
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| 98 | |
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| 99 | virtual void SetMomentum( const G4Vector3D& mom ) |
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| 100 | { SetParameters( fPosition, mom ); } |
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| 101 | |
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| 102 | void SetParameters( const G4Point3D& pos, const G4Vector3D& mom ) |
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| 103 | { |
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| 104 | fPosition = pos; |
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| 105 | fMomentum = mom; |
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| 106 | fTrajParam.SetParameters( pos, mom ); |
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| 107 | } |
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| 108 | |
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| 109 | G4ErrorFreeTrajParam GetParameters() const |
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| 110 | { return fTrajParam; } |
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| 111 | |
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| 112 | private: |
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| 113 | |
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| 114 | void Init(); |
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| 115 | // define TrajState type and build charge |
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| 116 | |
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| 117 | G4int PropagateErrorMSC( const G4Track* aTrack ); |
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| 118 | // add the error associated to multiple scattering |
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| 119 | |
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| 120 | void CalculateEffectiveZandA( const G4Material* mate, double& effZ, double& effA ); |
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| 121 | // calculate effective Z and A (needed by PropagateErrorMSC) |
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| 122 | |
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| 123 | G4int PropagateErrorIoni( const G4Track* aTrack ); |
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| 124 | // add the error associated to ionization energy loss |
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| 125 | |
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| 126 | |
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| 127 | private: |
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| 128 | |
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| 129 | G4ErrorFreeTrajParam fTrajParam; |
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| 130 | |
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| 131 | G4ErrorMatrix theTransfMat; |
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| 132 | |
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| 133 | G4bool theFirstStep; // to count if transf mat is updated or initialized |
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| 134 | }; |
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| 135 | |
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| 136 | #endif |
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