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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 // G4VGaussianQuadrature class implementation << 27 // 23 // 28 // Author: V.Grichine, 18.04.1997 << 24 // $Id: G4VGaussianQuadrature.cc,v 1.3 2001/07/11 10:00:42 gunter Exp $ 29 // ------------------------------------------- << 25 // GEANT4 tag $Name: geant4-05-02-patch-01 $ >> 26 // >> 27 // Implementation file for G4VGaussianQuadrature virtual base class >> 28 // 30 29 31 #include "G4VGaussianQuadrature.hh" << 32 #include "G4ios.hh" 30 #include "G4ios.hh" 33 #include "globals.hh" 31 #include "globals.hh" >> 32 #include "G4VGaussianQuadrature.hh" 34 33 35 G4VGaussianQuadrature::G4VGaussianQuadrature(f << 34 36 : fFunction(pFunction) << 35 37 {} << 36 >> 37 G4VGaussianQuadrature::G4VGaussianQuadrature( function pFunction ) >> 38 { >> 39 fFunction = pFunction ; >> 40 fAbscissa = 0; >> 41 fWeight = 0; >> 42 } 38 43 39 // ------------------------------------------- 44 // ------------------------------------------------------------------- 40 // 45 // 41 // Virtual destructor which deletes dynamicall 46 // Virtual destructor which deletes dynamically allocated memory 42 // 47 // 43 48 44 G4VGaussianQuadrature::~G4VGaussianQuadrature( << 49 G4VGaussianQuadrature::~G4VGaussianQuadrature() 45 { 50 { 46 delete[] fAbscissa; << 51 delete[] fAbscissa ; 47 delete[] fWeight; << 52 delete[] fWeight ; 48 } 53 } 49 54 50 // -------------------------- Access functions << 55 // -------------------------- Access functions ---------------------------------- 51 // ---------------------------------- << 56 52 57 53 G4double G4VGaussianQuadrature::GetAbscissa(G4 << 58 G4double >> 59 G4VGaussianQuadrature::GetAbscissa(G4int index) const 54 { 60 { 55 return fAbscissa[index]; << 61 return fAbscissa[index] ; 56 } 62 } 57 63 58 G4double G4VGaussianQuadrature::GetWeight(G4in << 64 G4double >> 65 G4VGaussianQuadrature::GetWeight(G4int index) const 59 { 66 { 60 return fWeight[index]; << 67 return fWeight[index] ; 61 } 68 } 62 69 63 G4int G4VGaussianQuadrature::GetNumber() const << 64 70 65 // ------------------------------------------- 71 // ---------------------------------------------------------------------------- 66 // 72 // 67 // Auxiliary function which returns the value << 73 // Auxiliary function which returns the value of log(gamma-function(x)) 68 // 74 // 69 75 70 G4double G4VGaussianQuadrature::GammaLogarithm << 76 G4double >> 77 G4VGaussianQuadrature::GammaLogarithm(G4double xx) 71 { 78 { 72 // Returns the value ln(Gamma(xx) for xx > 0 << 79 73 // xx > 1. For 0 < xx < 1. the reflection fo << 80 // Returns the value ln(Gamma(xx) for xx > 0. Full accuracy is obtained for 74 // (Adapted from Numerical Recipes in C) << 81 // xx > 1. For 0 < xx < 1. the reflection formula (6.1.4) can be used first. 75 << 82 // (Adapted from Numerical Recipes in C) 76 static const G4double cof[6] = { 76.18009172 << 83 77 24.01409824 << 84 static G4double cof[6] = { 76.18009172947146, -86.50532032941677, 78 0.120865097 << 85 24.01409824083091, -1.231739572450155, 79 G4double x = xx - 1.0; << 86 0.1208650973866179e-2, -0.5395239384953e-5 } ; 80 G4double tmp = x + 5.5; << 87 register HepInt j; 81 tmp -= (x + 0.5) * std::log(tmp); << 88 G4double x = xx - 1.0; >> 89 G4double tmp = x + 5.5; >> 90 tmp -= (x + 0.5) * log(tmp); 82 G4double ser = 1.000000000190015; 91 G4double ser = 1.000000000190015; 83 92 84 for(size_t j = 0; j <= 5; ++j) << 93 for ( j = 0; j <= 5; j++ ) 85 { 94 { 86 x += 1.0; 95 x += 1.0; 87 ser += cof[j] / x; << 96 ser += cof[j]/x; 88 } 97 } 89 return -tmp + std::log(2.5066282746310005 * << 98 return -tmp + log(2.5066282746310005*ser); 90 } 99 } >> 100 >> 101 >> 102 91 103