Geant4 Cross Reference

Cross-Referencing   Geant4
Geant4/global/HEPNumerics/src/G4GaussChebyshevQ.cc

Version: [ ReleaseNotes ] [ 1.0 ] [ 1.1 ] [ 2.0 ] [ 3.0 ] [ 3.1 ] [ 3.2 ] [ 4.0 ] [ 4.0.p1 ] [ 4.0.p2 ] [ 4.1 ] [ 4.1.p1 ] [ 5.0 ] [ 5.0.p1 ] [ 5.1 ] [ 5.1.p1 ] [ 5.2 ] [ 5.2.p1 ] [ 5.2.p2 ] [ 6.0 ] [ 6.0.p1 ] [ 6.1 ] [ 6.2 ] [ 6.2.p1 ] [ 6.2.p2 ] [ 7.0 ] [ 7.0.p1 ] [ 7.1 ] [ 7.1.p1 ] [ 8.0 ] [ 8.0.p1 ] [ 8.1 ] [ 8.1.p1 ] [ 8.1.p2 ] [ 8.2 ] [ 8.2.p1 ] [ 8.3 ] [ 8.3.p1 ] [ 8.3.p2 ] [ 9.0 ] [ 9.0.p1 ] [ 9.0.p2 ] [ 9.1 ] [ 9.1.p1 ] [ 9.1.p2 ] [ 9.1.p3 ] [ 9.2 ] [ 9.2.p1 ] [ 9.2.p2 ] [ 9.2.p3 ] [ 9.2.p4 ] [ 9.3 ] [ 9.3.p1 ] [ 9.3.p2 ] [ 9.4 ] [ 9.4.p1 ] [ 9.4.p2 ] [ 9.4.p3 ] [ 9.4.p4 ] [ 9.5 ] [ 9.5.p1 ] [ 9.5.p2 ] [ 9.6 ] [ 9.6.p1 ] [ 9.6.p2 ] [ 9.6.p3 ] [ 9.6.p4 ] [ 10.0 ] [ 10.0.p1 ] [ 10.0.p2 ] [ 10.0.p3 ] [ 10.0.p4 ] [ 10.1 ] [ 10.1.p1 ] [ 10.1.p2 ] [ 10.1.p3 ] [ 10.2 ] [ 10.2.p1 ] [ 10.2.p2 ] [ 10.2.p3 ] [ 10.3 ] [ 10.3.p1 ] [ 10.3.p2 ] [ 10.3.p3 ] [ 10.4 ] [ 10.4.p1 ] [ 10.4.p2 ] [ 10.4.p3 ] [ 10.5 ] [ 10.5.p1 ] [ 10.6 ] [ 10.6.p1 ] [ 10.6.p2 ] [ 10.6.p3 ] [ 10.7 ] [ 10.7.p1 ] [ 10.7.p2 ] [ 10.7.p3 ] [ 10.7.p4 ] [ 11.0 ] [ 11.0.p1 ] [ 11.0.p2 ] [ 11.0.p3, ] [ 11.0.p4 ] [ 11.1 ] [ 11.1.1 ] [ 11.1.2 ] [ 11.1.3 ] [ 11.2 ] [ 11.2.1 ] [ 11.2.2 ] [ 11.3.0 ]

Diff markup

Differences between /global/HEPNumerics/src/G4GaussChebyshevQ.cc (Version 11.3.0) and /global/HEPNumerics/src/G4GaussChebyshevQ.cc (Version 5.0.p1)


  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 // G4GaussChebyshevQ class implementation      << 
 27 //                                                 23 //
 28 // Author: V.Grichine, 13.05.1997              <<  24 // $Id: G4GaussChebyshevQ.cc,v 1.3 2001/07/11 10:00:41 gunter Exp $
 29 // ------------------------------------------- <<  25 // GEANT4 tag $Name: geant4-05-00 $
 30                                                <<  26 //
 31 #include "G4GaussChebyshevQ.hh"                    27 #include "G4GaussChebyshevQ.hh"
 32 #include "G4PhysicalConstants.hh"              << 
 33                                                    28 
 34 // -------------------------------------------     29 // -----------------------------------------------------
 35 //                                                 30 //
 36 // Constructor for Gauss-Chebyshev quadrature      31 // Constructor for Gauss-Chebyshev quadrature method
                                                   >>  32 
                                                   >>  33 G4GaussChebyshevQ::G4GaussChebyshevQ( function pFunction ,
                                                   >>  34                     G4int nChebyshev       )
                                                   >>  35    : G4VGaussianQuadrature(pFunction)
                                                   >>  36 {
                                                   >>  37    G4int i ;
                                                   >>  38    fNumber = nChebyshev  ;   // Try to reduce fNumber twice ??
                                                   >>  39    G4double cof = pi/fNumber ;
                                                   >>  40    fAbscissa = new G4double[fNumber] ;
                                                   >>  41    fWeight = new G4double[fNumber] ;
                                                   >>  42    for(i=0;i<fNumber;i++)
                                                   >>  43    {
                                                   >>  44       fAbscissa[i] = cos(cof*(i + 0.5)) ;
                                                   >>  45       fWeight[i] = cof*sqrt(1 - fAbscissa[i]*fAbscissa[i]) ;
                                                   >>  46    }
                                                   >>  47 }
                                                   >>  48 
                                                   >>  49 // ----------------------------------------------------------------------
 37 //                                                 50 //
 38 G4GaussChebyshevQ::G4GaussChebyshevQ(function  <<  51 
 39   : G4VGaussianQuadrature(pFunction)           <<  52 G4GaussChebyshevQ::~G4GaussChebyshevQ()
 40 {                                                  53 {
 41   fNumber      = nChebyshev;  // Try to reduce <<  54    ;
 42   G4double cof = pi / fNumber;                 << 
 43   fAbscissa    = new G4double[fNumber];        << 
 44   fWeight      = new G4double[fNumber];        << 
 45   for(G4int i = 0; i < fNumber; ++i)           << 
 46   {                                            << 
 47     fAbscissa[i] = std::cos(cof * (i + 0.5));  << 
 48     fWeight[i]   = cof * std::sqrt(1 - fAbscis << 
 49   }                                            << 
 50 }                                                  55 }
 51                                                    56 
 52 // -------------------------------------------     57 // -------------------------------------------------------------------------------
 53 //                                                 58 //
 54 // Integrates function pointed by fFunction fr <<  59 // Integrates function pointed by fFunction from a to b by Gauss-Chebyshev 
 55 // quadrature method                               60 // quadrature method
 56 //                                             << 
 57 G4double G4GaussChebyshevQ::Integral(G4double  << 
 58 {                                              << 
 59   G4double xDiff = 0.5 * (b - a), xMean = 0.5  << 
 60            integral = 0.0;                     << 
 61                                                    61 
 62   for(G4int i = 0; i < fNumber; ++i)           <<  62 G4double 
 63   {                                            <<  63 G4GaussChebyshevQ::Integral(G4double a, G4double b) const 
 64     dx = xDiff * fAbscissa[i];                 <<  64 {
 65     integral += fWeight[i] * fFunction(xMean + <<  65    G4int i ;
 66   }                                            <<  66    G4double xDiff, xMean, dx, integral = 0.0 ;
 67   return integral *= xDiff;                    <<  67    
                                                   >>  68    xMean = 0.5*(a + b) ;
                                                   >>  69    xDiff = 0.5*(b - a) ;
                                                   >>  70    for(i=0;i<fNumber;i++)
                                                   >>  71    {
                                                   >>  72       dx = xDiff*fAbscissa[i] ;
                                                   >>  73       integral += fWeight[i]*fFunction(xMean + dx)  ;
                                                   >>  74    }
                                                   >>  75    return integral *= xDiff ;
 68 }                                                  76 }
 69                                                    77