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00001 /*---------------------------------------------------------------------------*\ 00002 ========= | 00003 \\ / F ield | OpenFOAM: The Open Source CFD Toolbox 00004 \\ / O peration | 00005 \\ / A nd | Copyright (C) 1991-2005 OpenCFD Ltd. 00006 \\/ M anipulation | 00007 ------------------------------------------------------------------------------- 00008 License 00009 This file is part of OpenFOAM. 00010 00011 OpenFOAM is free software; you can redistribute it and/or modify it 00012 under the terms of the GNU General Public License as published by the 00013 Free Software Foundation; either version 2 of the License, or (at your 00014 option) any later version. 00015 00016 OpenFOAM is distributed in the hope that it will be useful, but WITHOUT 00017 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 00018 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 00019 for more details. 00020 00021 You should have received a copy of the GNU General Public License 00022 along with OpenFOAM; if not, write to the Free Software Foundation, 00023 Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA 00024 00025 Class 00026 Random 00027 00028 Description 00029 Simple random number generator. 00030 00031 SourceFiles 00032 Random.C 00033 00034 \*---------------------------------------------------------------------------*/ 00035 00036 #ifndef Random_H 00037 #define Random_H 00038 00039 #include "vector.H" 00040 #include "tensor.H" 00041 00042 // * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * // 00043 00044 namespace Foam 00045 { 00046 00047 /*---------------------------------------------------------------------------*\ 00048 Class Random Declaration 00049 \*---------------------------------------------------------------------------*/ 00050 00051 class Random 00052 { 00053 // Private data 00054 00055 label Seed; 00056 00057 00058 public: 00059 00060 00061 // Constructors 00062 00063 //- Construct given seed 00064 Random(const label&); 00065 00066 00067 // Member functions 00068 00069 int bit(); 00070 00071 //- scalar [0..1] (so including 0,1) 00072 scalar scalar01(); 00073 //- vector with every component scalar01 00074 vector vector01(); 00075 //- tensor with every component scalar01 00076 tensor tensor01(); 00077 //- tensor with every component scalar01 00078 sphericalTensor sphericalTensor01(); 00079 //- label [lower..upper] 00080 label integer(const label lower, const label upper); 00081 00082 vector position(const vector&, const vector&); 00083 00084 void randomise(scalar&); 00085 void randomise(vector&); 00086 void randomise(tensor&); 00087 void randomise(sphericalTensor&); 00088 00089 //- Return a normal Gaussian randon number 00090 // with zero mean and unity variance N(0, 1) 00091 scalar GaussNormal(); 00092 }; 00093 00094 00095 // * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * // 00096 00097 } // End namespace Foam 00098 00099 // * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * // 00100 00101 #endif 00102 00103 // ************************************************************************* //