00001 // 00002 // ******************************************************************** 00003 // * License and Disclaimer * 00004 // * * 00005 // * The Geant4 software is copyright of the Copyright Holders of * 00006 // * the Geant4 Collaboration. It is provided under the terms and * 00007 // * conditions of the Geant4 Software License, included in the file * 00008 // * LICENSE and available at http://cern.ch/geant4/license . These * 00009 // * include a list of copyright holders. * 00010 // * * 00011 // * Neither the authors of this software system, nor their employing * 00012 // * institutes,nor the agencies providing financial support for this * 00013 // * work make any representation or warranty, express or implied, * 00014 // * regarding this software system or assume any liability for its * 00015 // * use. Please see the license in the file LICENSE and URL above * 00016 // * for the full disclaimer and the limitation of liability. * 00017 // * * 00018 // * This code implementation is the result of the scientific and * 00019 // * technical work of the GEANT4 collaboration. * 00020 // * By using, copying, modifying or distributing the software (or * 00021 // * any work based on the software) you agree to acknowledge its * 00022 // * use in resulting scientific publications, and indicate your * 00023 // * acceptance of all terms of the Geant4 Software license. * 00024 // ******************************************************************** 00025 // 00026 // 00027 // $Id: G4ErrorTrackLengthTarget.hh 69766 2013-05-14 14:33:55Z gcosmo $ 00028 // 00029 // 00030 // Class Description: 00031 // 00032 // G4ErrorTarget class: limits step when track length is bigger than 00033 // theMaximumTrackLength. It is a G4VDiscreteProcess: limits the step in 00034 // PostStepGetPhysicalInteractionLength(). 00035 00036 // History: 00037 // - Created. P. Arce, September 2004 00038 // -------------------------------------------------------------------- 00039 00040 #ifndef G4ErrorTrackLengthTarget_hh 00041 #define G4ErrorTrackLengthTarget_hh 00042 00043 #include "G4ios.hh" 00044 #include "globals.hh" 00045 #include "G4VDiscreteProcess.hh" 00046 #include "G4PhysicsTable.hh" 00047 #include "G4PhysicsLogVector.hh" 00048 #include "G4ElementTable.hh" 00049 #include "G4Step.hh" 00050 #include "G4ErrorTarget.hh" 00051 00052 //---------------------------------------------------------------------------- 00053 00054 class G4ErrorTrackLengthTarget : public G4VDiscreteProcess, 00055 public G4ErrorTarget 00056 { 00057 public: // with description 00058 00059 G4ErrorTrackLengthTarget(const G4double maxTrkLength ); 00060 // Constructs and add this process to G4ProcessManager of all particles 00061 virtual ~G4ErrorTrackLengthTarget(){} 00062 00063 // These methods are dummy, as the step limitation is done in the 00064 // PostStepGetPhysicalInteractionLength(). 00065 00066 virtual G4double GetDistanceFromPoint( const G4ThreeVector&, 00067 const G4ThreeVector& ) const 00068 { return DBL_MAX; } 00069 virtual G4double GetDistanceFromPoint( const G4ThreeVector& ) const 00070 { return DBL_MAX; } 00071 00072 virtual G4double 00073 PostStepGetPhysicalInteractionLength( const G4Track& track, 00074 G4double previousStepSize, 00075 G4ForceCondition* condition ); 00076 // Checks if the maximum track length has been reached 00077 00078 virtual G4double GetMeanFreePath(const class G4Track & track, 00079 G4double, G4ForceCondition *); 00080 // Mean free path = theMaximumTrackLength - track.GetTrackLength() 00081 00082 virtual G4VParticleChange* PostStepDoIt( const G4Track&, const G4Step& ); 00083 00084 virtual void Dump( const G4String& msg ) const; 00085 00086 private: 00087 00088 G4double theMaximumTrackLength; 00089 G4VParticleChange theParticleChange; 00090 }; 00091 00092 #endif