| 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 | // $Id: G4Pow.cc,v 1.2 2009/07/03 11:35:06 vnivanch Exp $ |
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| 27 | // GEANT4 tag $Name: geant4-09-04-beta-01 $ |
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| 28 | // |
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| 29 | // ------------------------------------------------------------------- |
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| 30 | // |
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| 31 | // GEANT4 Class file |
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| 32 | // |
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| 33 | // |
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| 34 | // File name: G4Pow |
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| 35 | // |
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| 36 | // Author: Vladimir Ivanchenko |
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| 37 | // |
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| 38 | // Creation date: 23.05.2009 |
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| 39 | // |
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| 40 | // ------------------------------------------------------------------- |
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| 41 | |
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| 42 | #include "G4Pow.hh" |
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| 43 | |
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| 44 | G4Pow* G4Pow::fInstance = 0; |
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| 45 | |
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| 46 | // ------------------------------------------------------------------- |
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| 47 | |
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| 48 | G4Pow* G4Pow::GetInstance() |
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| 49 | { |
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| 50 | if (fInstance == 0) |
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| 51 | { |
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| 52 | static G4Pow manager; |
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| 53 | fInstance = &manager; |
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| 54 | } |
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| 55 | return fInstance; |
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| 56 | } |
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| 57 | |
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| 58 | // ------------------------------------------------------------------- |
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| 59 | |
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| 60 | G4Pow::G4Pow() |
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| 61 | { |
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| 62 | const G4int maxZ = 256; |
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| 63 | |
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| 64 | pz13.resize(maxZ,0.0); |
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| 65 | lz.resize(maxZ,0.0); |
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| 66 | fact.resize(maxZ,0.0); |
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| 67 | |
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| 68 | onethird = 1.0/3.0; |
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| 69 | G4double f = 1.0; |
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| 70 | |
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| 71 | for(G4int i=1; i<maxZ; i++) |
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| 72 | { |
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| 73 | G4double x = G4double(i); |
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| 74 | pz13[i] = std::pow(x,onethird); |
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| 75 | lz[i] = std::log(x); |
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| 76 | f *= x; |
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| 77 | fact[i] = f; |
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| 78 | } |
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| 79 | fact[0] = 1.0; |
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| 80 | } |
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| 81 | |
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| 82 | // ------------------------------------------------------------------- |
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| 83 | |
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| 84 | G4Pow::~G4Pow() |
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| 85 | {} |
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| 86 | |
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| 87 | // ------------------------------------------------------------------- |
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