Geant4 Cross Reference |
1 // 1 // 2 // ******************************************* 2 // ******************************************************************** 3 // * License and Disclaimer << 3 // * DISCLAIMER * 4 // * 4 // * * 5 // * The Geant4 software is copyright of th << 5 // * The following disclaimer summarizes all the specific disclaimers * 6 // * the Geant4 Collaboration. It is provided << 6 // * of contributors to this software. The specific disclaimers,which * 7 // * conditions of the Geant4 Software License << 7 // * govern, are listed with their locations in: * 8 // * LICENSE and available at http://cern.ch/ << 8 // * http://cern.ch/geant4/license * 9 // * include a list of copyright holders. << 10 // * 9 // * * 11 // * Neither the authors of this software syst 10 // * Neither the authors of this software system, nor their employing * 12 // * institutes,nor the agencies providing fin 11 // * institutes,nor the agencies providing financial support for this * 13 // * work make any representation or warran 12 // * work make any representation or warranty, express or implied, * 14 // * regarding this software system or assum 13 // * regarding this software system or assume any liability for its * 15 // * use. Please see the license in the file << 14 // * use. * 16 // * for the full disclaimer and the limitatio << 17 // * 15 // * * 18 // * This code implementation is the result << 16 // * This code implementation is the intellectual property of the * 19 // * technical work of the GEANT4 collaboratio << 17 // * GEANT4 collaboration. * 20 // * By using, copying, modifying or distri << 18 // * By copying, distributing or modifying the Program (or any work * 21 // * any work based on the software) you ag << 19 // * based on the Program) you indicate your acceptance of this * 22 // * use in resulting scientific publicati << 20 // * statement, and all its terms. * 23 // * acceptance of all terms of the Geant4 Sof << 24 // ******************************************* 21 // ******************************************************************** 25 // 22 // 26 // G4HelixHeum implementation << 27 // 23 // 28 // Simple Heum: << 24 // $Id: G4HelixHeum.cc,v 1.4 2001/07/11 09:59:12 gunter Exp $ >> 25 // GEANT4 tag $Name: geant4-05-02 $ >> 26 // >> 27 #include "G4HelixHeum.hh" >> 28 #include "G4ThreeVector.hh" >> 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)))) >> 35 // W.Wander <wwc@mit.edu> 12/09/97 32 // 36 // 33 // Third order solver. << 37 // ------------------------------------------------------------------------- 34 // << 35 // Author: W.Wander <wwc@mit.edu>, 03/11/1998 << 36 // ------------------------------------------- << 37 << 38 #include "G4HelixHeum.hh" << 39 #include "G4ThreeVector.hh" << 40 38 41 G4HelixHeum::G4HelixHeum(G4Mag_EqRhs* EqRhs) << 39 // third order solver 42 : G4MagHelicalStepper(EqRhs) << 40 // 43 { << 44 } << 45 41 46 G4HelixHeum::~G4HelixHeum() = default; << 47 << 48 void 42 void 49 G4HelixHeum::DumbStepper( const G4double yIn[ 43 G4HelixHeum::DumbStepper( const G4double yIn[], 50 G4ThreeVector Bfld << 44 G4ThreeVector Bfld, 51 G4double h, << 45 G4double h, 52 G4double yOut << 46 G4double yOut[]) 53 { 47 { 54 const G4int nvar = 6 ; 48 const G4int nvar = 6 ; 55 49 56 G4ThreeVector Bfield_Temp, Bfield_Temp2; 50 G4ThreeVector Bfield_Temp, Bfield_Temp2; 57 G4double yTemp[6], yAdd1[6], yAdd2[6] , yTem 51 G4double yTemp[6], yAdd1[6], yAdd2[6] , yTemp2[6]; 58 52 >> 53 G4int i; >> 54 59 AdvanceHelix( yIn, Bfld, h, yAdd1 ); 55 AdvanceHelix( yIn, Bfld, h, yAdd1 ); 60 56 61 AdvanceHelix( yIn, Bfld, h/3.0, yTemp ); 57 AdvanceHelix( yIn, Bfld, h/3.0, yTemp ); 62 MagFieldEvaluate(yTemp,Bfield_Temp); 58 MagFieldEvaluate(yTemp,Bfield_Temp); 63 59 64 AdvanceHelix( yIn, Bfield_Temp, (2.0 / 3.0) 60 AdvanceHelix( yIn, Bfield_Temp, (2.0 / 3.0) * h, yTemp2 ); 65 61 66 MagFieldEvaluate(yTemp2,Bfield_Temp2); 62 MagFieldEvaluate(yTemp2,Bfield_Temp2); 67 63 68 AdvanceHelix( yIn, Bfield_Temp2, h, yAdd2 ); 64 AdvanceHelix( yIn, Bfield_Temp2, h, yAdd2 ); 69 65 70 for( G4int i = 0; i < nvar; ++i ) << 66 for( i = 0; i < nvar; i++ ) { 71 { << 72 yOut[i] = ( 0.25 * yAdd1[i] + 0.75 * yAdd2 67 yOut[i] = ( 0.25 * yAdd1[i] + 0.75 * yAdd2[i]); 73 } 68 } 74 69 75 // NormaliseTangentVector( yOut ); 70 // NormaliseTangentVector( yOut ); >> 71 >> 72 return ; 76 } 73 } 77 74