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: G4CachedMagneticField.cc,v 1.1 2009/11/05 11:06:13 japost Exp $ |
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28 | // GEANT4 tag $Name: geant4-09-04-beta-01 $ |
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29 | // |
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30 | // -------------------------------------------------------------------- |
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31 | |
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32 | #include "G4CachedMagneticField.hh" |
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33 | |
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34 | G4CachedMagneticField::G4CachedMagneticField(G4MagneticField *pMagField, |
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35 | G4double distance) |
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36 | : G4MagneticField(), |
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37 | fLastLocation(DBL_MAX,DBL_MAX,DBL_MAX), |
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38 | fLastValue(DBL_MAX,DBL_MAX,DBL_MAX), |
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39 | fCountCalls(0), fCountEvaluations(0) |
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40 | { |
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41 | fpMagneticField= pMagField; |
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42 | fDistanceConst= distance; |
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43 | |
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44 | // G4cout << " Cached-B-Field constructor> Distance = " << distance << G4endl; |
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45 | this->ClearCounts(); |
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46 | } |
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47 | |
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48 | G4CachedMagneticField::~G4CachedMagneticField() |
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49 | { |
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50 | } |
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51 | |
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52 | void |
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53 | G4CachedMagneticField::ReportStatistics() |
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54 | { |
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55 | G4cout << " Cached field: " << this << G4endl |
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56 | << " Number of calls: " << fCountCalls << G4endl |
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57 | << " Number of evaluations : " << fCountEvaluations << G4endl; |
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58 | } |
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59 | |
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60 | G4CachedMagneticField::G4CachedMagneticField(const G4CachedMagneticField &rightCMF) |
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61 | : G4MagneticField() |
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62 | { |
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63 | fpMagneticField= rightCMF.fpMagneticField; |
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64 | fDistanceConst = rightCMF.fDistanceConst; |
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65 | fLastLocation = rightCMF.fLastLocation; |
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66 | fLastValue = rightCMF.fLastValue; |
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67 | this->ClearCounts(); |
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68 | } |
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69 | |
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70 | G4CachedMagneticField& G4CachedMagneticField::operator = (const G4CachedMagneticField &p) |
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71 | { |
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72 | if (&p == this) return *this; *this = p; return *this; |
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73 | } |
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74 | |
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75 | void |
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76 | G4CachedMagneticField::GetFieldValue( const G4double Point[4], |
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77 | G4double *Bfield ) const |
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78 | { |
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79 | G4ThreeVector newLocation( Point[0], Point[1], Point[2] ); |
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80 | |
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81 | // G4cout << "Cache-B-field called at " << newLocation << G4endl; |
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82 | |
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83 | G4double distSq= (newLocation-fLastLocation).mag2(); |
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84 | fCountCalls++; |
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85 | if( distSq < fDistanceConst*fDistanceConst ) { |
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86 | Bfield[0] = fLastValue.x(); |
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87 | Bfield[1] = fLastValue.y(); |
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88 | Bfield[2] = fLastValue.z(); |
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89 | }else{ |
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90 | // G4CachedMagneticField* thisNonC= const_cast<G4CachedMagneticField*>(this); |
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91 | fpMagneticField->GetFieldValue( Point, Bfield ); |
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92 | // G4cout << " Evaluating. " << G4endl; |
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93 | fCountEvaluations++; |
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94 | // thisNonC-> |
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95 | fLastLocation= G4ThreeVector( Point[0], Point[1], Point[2] ); |
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96 | // thisNonC-> |
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97 | fLastValue= G4ThreeVector( Bfield[0], Bfield[1], Bfield[2] ); |
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98 | } |
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99 | } |
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