Geant4 Cross Reference |
1 // 1 // 2 // ******************************************* 2 // ******************************************************************** 3 // * License and Disclaimer 3 // * License and Disclaimer * 4 // * 4 // * * 5 // * The Geant4 software is copyright of th 5 // * The Geant4 software is copyright of the Copyright Holders of * 6 // * the Geant4 Collaboration. It is provided 6 // * the Geant4 Collaboration. It is provided under the terms and * 7 // * conditions of the Geant4 Software License 7 // * conditions of the Geant4 Software License, included in the file * 8 // * LICENSE and available at http://cern.ch/ 8 // * LICENSE and available at http://cern.ch/geant4/license . These * 9 // * include a list of copyright holders. 9 // * include a list of copyright holders. * 10 // * 10 // * * 11 // * Neither the authors of this software syst 11 // * Neither the authors of this software system, nor their employing * 12 // * institutes,nor the agencies providing fin 12 // * institutes,nor the agencies providing financial support for this * 13 // * work make any representation or warran 13 // * work make any representation or warranty, express or implied, * 14 // * regarding this software system or assum 14 // * regarding this software system or assume any liability for its * 15 // * use. Please see the license in the file 15 // * use. Please see the license in the file LICENSE and URL above * 16 // * for the full disclaimer and the limitatio 16 // * for the full disclaimer and the limitation of liability. * 17 // * 17 // * * 18 // * This code implementation is the result 18 // * This code implementation is the result of the scientific and * 19 // * technical work of the GEANT4 collaboratio 19 // * technical work of the GEANT4 collaboration. * 20 // * By using, copying, modifying or distri 20 // * By using, copying, modifying or distributing the software (or * 21 // * any work based on the software) you ag 21 // * any work based on the software) you agree to acknowledge its * 22 // * use in resulting scientific publicati 22 // * use in resulting scientific publications, and indicate your * 23 // * acceptance of all terms of the Geant4 Sof 23 // * acceptance of all terms of the Geant4 Software license. * 24 // ******************************************* 24 // ******************************************************************** 25 // 25 // 26 // G4HelixHeum implementation << 27 // 26 // 28 // Simple Heum: << 27 // $Id: G4HelixHeum.cc,v 1.6 2006/06/29 18:24:04 gunter Exp $ >> 28 // GEANT4 tag $Name: geant4-08-01-patch-01 $ >> 29 // >> 30 // >> 31 // Simple Heum: 29 // x_1 = x_0 + h * 32 // x_1 = x_0 + h * 30 // 1/4 * dx(t0,x0) + 33 // 1/4 * dx(t0,x0) + 31 // 3/4 * dx(t0+2/3*h, x0+2/3*h* 34 // 3/4 * dx(t0+2/3*h, x0+2/3*h*(dx(t0+h/3,x0+h/3*dx(t0,x0)))) 32 // 35 // 33 // Third order solver. 36 // Third order solver. 34 // 37 // 35 // Author: W.Wander <wwc@mit.edu>, 03/11/1998 << 38 // W.Wander <wwc@mit.edu> 12/09/97 36 // ------------------------------------------- 39 // ------------------------------------------------------------------- 37 40 38 #include "G4HelixHeum.hh" 41 #include "G4HelixHeum.hh" 39 #include "G4ThreeVector.hh" 42 #include "G4ThreeVector.hh" 40 43 41 G4HelixHeum::G4HelixHeum(G4Mag_EqRhs* EqRhs) << 42 : G4MagHelicalStepper(EqRhs) << 43 { << 44 } << 45 << 46 G4HelixHeum::~G4HelixHeum() = default; << 47 << 48 void 44 void 49 G4HelixHeum::DumbStepper( const G4double yIn[ 45 G4HelixHeum::DumbStepper( const G4double yIn[], 50 G4ThreeVector Bfld << 46 G4ThreeVector Bfld, 51 G4double h, << 47 G4double h, 52 G4double yOut << 48 G4double yOut[]) 53 { 49 { 54 const G4int nvar = 6 ; 50 const G4int nvar = 6 ; 55 51 56 G4ThreeVector Bfield_Temp, Bfield_Temp2; 52 G4ThreeVector Bfield_Temp, Bfield_Temp2; 57 G4double yTemp[6], yAdd1[6], yAdd2[6] , yTem 53 G4double yTemp[6], yAdd1[6], yAdd2[6] , yTemp2[6]; 58 54 >> 55 G4int i; >> 56 59 AdvanceHelix( yIn, Bfld, h, yAdd1 ); 57 AdvanceHelix( yIn, Bfld, h, yAdd1 ); 60 58 61 AdvanceHelix( yIn, Bfld, h/3.0, yTemp ); 59 AdvanceHelix( yIn, Bfld, h/3.0, yTemp ); 62 MagFieldEvaluate(yTemp,Bfield_Temp); 60 MagFieldEvaluate(yTemp,Bfield_Temp); 63 61 64 AdvanceHelix( yIn, Bfield_Temp, (2.0 / 3.0) 62 AdvanceHelix( yIn, Bfield_Temp, (2.0 / 3.0) * h, yTemp2 ); 65 63 66 MagFieldEvaluate(yTemp2,Bfield_Temp2); 64 MagFieldEvaluate(yTemp2,Bfield_Temp2); 67 65 68 AdvanceHelix( yIn, Bfield_Temp2, h, yAdd2 ); 66 AdvanceHelix( yIn, Bfield_Temp2, h, yAdd2 ); 69 67 70 for( G4int i = 0; i < nvar; ++i ) << 68 for( i = 0; i < nvar; i++ ) { 71 { << 72 yOut[i] = ( 0.25 * yAdd1[i] + 0.75 * yAdd2 69 yOut[i] = ( 0.25 * yAdd1[i] + 0.75 * yAdd2[i]); 73 } 70 } 74 71 75 // NormaliseTangentVector( yOut ); 72 // NormaliseTangentVector( yOut ); 76 } 73 } 77 74