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 // $Id$ 00028 // 00029 // 00030 // -------------------------------------------------------------------- 00031 // GEANT 4 class header file 00032 // -------------------------------------------------------------------- 00033 // 00034 // Class Description: 00035 // 00036 // Class for performing double navigation in the detector geometry and 00037 // on the target surface for error propagation. It overloads ComputeStep() 00038 // and ComputeSafety() methods. 00039 00040 // History: 00041 // - Created. P. Arce, September 2004 00042 // -------------------------------------------------------------------- 00043 00044 #ifndef G4ErrorPropagationNavigator_hh 00045 #define G4ErrorPropagationNavigator_hh 00046 00047 #include "G4Navigator.hh" 00048 #include "G4ThreeVector.hh" 00049 00050 class G4ErrorPropagationNavigator : public G4Navigator 00051 { 00052 public: // with description 00053 00054 G4ErrorPropagationNavigator(); 00055 ~G4ErrorPropagationNavigator(); 00056 00057 G4double ComputeStep (const G4ThreeVector &pGlobalPoint, 00058 const G4ThreeVector &pDirection, 00059 const G4double pCurrentProposedStepLength, 00060 G4double &pNewSafety); 00061 // Calls the navigation in the detector geometry and then checks 00062 // if the distance to surface is smaller than the proposed step 00063 00064 G4double ComputeSafety(const G4ThreeVector &globalpoint, 00065 const G4double pProposedMaxLength = DBL_MAX, 00066 const G4bool keepState = true); 00067 // Calls the navigation in the detector geometry and then checks 00068 // if the distance to surface is smaller than the proposed safety 00069 00070 }; 00071 00072 #endif
1.4.7