1 | // This file is part of the PACPUS framework distributed under the
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2 | // CECILL-C License, Version 1.0.
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3 | //
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4 | /// @file
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5 | /// @author Firstname Surname <firstname.surname@utc.fr>
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6 | /// @date Month, Year
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7 | /// @version $Id: rng.hpp 66 2013-01-09 16:54:11Z kurdejma $
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8 | /// @copyright Copyright (c) UTC/CNRS Heudiasyc 2006 - 2013. All rights reserved.
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9 | /// @brief Brief description.
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10 | ///
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11 | /// Detailed description.
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12 |
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13 | #ifndef __BOOST_RNG__
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14 | #define __BOOST_RNG__
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15 |
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16 | #include <boost/random.hpp>
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17 | #include <boost/math/distributions.hpp>
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18 | #include <ctime>
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19 |
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20 | namespace math {
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21 |
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22 | namespace rng {
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23 |
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24 | /*!
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25 | * \class normal_generator
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26 | * \brief This class is basic normal random number generator \n
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27 | * template id RealType describe number precision (float double ....)\n
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28 | * template id PRNG describe pseudo random number generator ( see boost random)
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29 | */
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30 | template < class RealType , class PRNG > class normal_generator {
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31 | public :
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32 | /*!
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33 | * Default construtor
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34 | */
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35 | normal_generator():
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36 | engine(time(NULL)),
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37 | generator(engine,boost::normal_distribution<RealType>(0,1))
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38 | {}
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39 | /*!
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40 | * Construtor
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41 | * \param dist : a normal distribution (see boost distributions)
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42 | */
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43 | normal_generator(const boost::math::normal_distribution<RealType> & dist):
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44 | engine(time(NULL)),
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45 | generator(engine,boost::normal_distribution<RealType>(dist.mean(),dist.sigma()))
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46 | {}
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47 | /*!
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48 | * Construtor
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49 | * \param mean : mean of the normal distribution
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50 | * \param sigma : satndard deviation of the normal distribution
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51 | */
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52 | normal_generator(const RealType & mean ,const RealType & sigma):
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53 | engine(time(NULL)),
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54 | generator(engine,boost::normal_distribution<RealType>(mean(),sigma()))
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55 | {}
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56 |
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57 | /*!
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58 | * Get a random number
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59 | */
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60 | RealType operator()() {return generator();}
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61 |
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62 | /*!
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63 | * Set normal distribution
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64 | * \param dist : a normal distribution (see boost distributions)
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65 | */
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66 | void distribution( const boost::math::normal_distribution<RealType> & dist) {
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67 | generator.dist= boost::normal_distribution<RealType>(dist.mean(),dist.standard_deviation());
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68 | }
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69 |
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70 | /*!
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71 | * Set normal distrubution
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72 | * \param mean : mean of the normal distribution
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73 | * \param sigma : satndard deviation of the normal distribution
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74 | */
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75 | void distribution( const RealType & mean ,const RealType & sigma) {
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76 | generator.distribution()= boost::normal_distribution<RealType>(mean,sigma);
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77 | }
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78 |
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79 | private :
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80 |
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81 | /*!
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82 | * \brief pseudo random number generator
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83 | */
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84 | PRNG engine;
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85 |
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86 | /*!
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87 | * \brief the normal random number generator
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88 | */
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89 | boost::variate_generator<PRNG, boost::normal_distribution<RealType> > generator;
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90 | };
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91 |
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92 | typedef class normal_generator<double,boost::mt19937> normal_rng;
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93 |
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94 |
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95 |
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96 | /*!
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97 | * \class uniform_generator
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98 | * \brief This class is basic uniform random number generator \n
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99 | * template id RealType describe number precision (float double ....)\n
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100 | * template id PRNG describe pseudo random number generator ( see boost random)
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101 | */
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102 | template < class RealType , class PRNG > class uniform_generator {
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103 |
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104 | public :
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105 | /*!
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106 | * Default construtor
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107 | */
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108 | uniform_generator():
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109 | engine(time(NULL)),
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110 | generator(engine, boost::uniform_real<RealType>(0,1))
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111 | {}
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112 | /*!
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113 | * Construtor
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114 | * \param dist : a uniform distribution (see boost distributions)
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115 | */
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116 | uniform_generator(const boost::math::uniform_distribution<RealType> & dist):
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117 | engine(time(NULL)),
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118 | generator(engine, boost::uniform_real<RealType>(dist.lower(),dist.upper()))
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119 | {}
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120 | /*!
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121 | * Construtor
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122 | * \param lower : the lower value of the uniform distribution
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123 | * \param upper : the upper value of the uniform distribution
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124 | */
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125 | uniform_generator(const RealType & lower , const RealType & upper):
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126 | engine(time(NULL)),
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127 | generator(engine, boost::uniform_real<RealType>(lower,upper))
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128 | {}
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129 |
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130 | /*!
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131 | * Get a random number
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132 | */
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133 | RealType operator()() {return generator();}
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134 | /*!
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135 | * Set uniform distribution
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136 | * \param dist : a normal distribution (see boost distributions)
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137 | */
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138 | void distribution( const boost::math::uniform_distribution<RealType> & dist) {
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139 | generator.dist()= boost::uniform_real<RealType>(dist.lower(),dist.upper());
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140 | }
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141 | /*!
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142 | * Set uniform distribution
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143 | * \param lower : the lower value of the uniform distribution
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144 | * \param upper : the upper value of the uniform distribution
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145 | */
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146 | void distribution( const RealType & lower , const RealType & upper) {
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147 | generator.dist()= boost::uniform_real<RealType>(lower,upper);
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148 | }
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149 |
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150 | private :
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151 | /*!
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152 | * \brief pseudo random number generator
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153 | */
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154 | PRNG engine;
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155 | /*!
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156 | * \brief the uniform random number generator
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157 | */
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158 | boost::variate_generator<PRNG, boost::uniform_real<RealType> > generator;
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159 | };
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160 |
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161 | typedef class uniform_generator<double,boost::mt19937> uniform_rng;
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162 |
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163 |
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164 | /*!
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165 | * \class traingle_generator
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166 | * \brief This class is basic triangular random number generator \n
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167 | * template id RealType describe number precision (float double ....)\n
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168 | * template id PRNG describe pseudo random number generator ( see boost random)
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169 | */
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170 | template < class RealType , class PRNG > class triangle_generator {
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171 |
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172 | public :
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173 | /*!
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174 | * Default construtor
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175 | */
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176 | triangle_generator():
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177 | engine(time(NULL)),
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178 | generator(engine, boost::triangle_distribution<RealType>(-1,0,1))
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179 | {}
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180 | /*!
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181 | * Construtor
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182 | * \param dist : a traingle distribution (see boost distributions)
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183 | */
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184 | triangle_generator(const boost::math::triangular_distribution<RealType> & dist):
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185 | engine(time(NULL)),
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186 | generator(engine, boost::triangle_distribution<RealType>(dist.lower(),dist.upper()))
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187 | {}
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188 | /*!
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189 | * Constructor :
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190 | * \param lower : the lower value of the uniform distribution
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191 | * \param mode : the mode value of the uniform distribution
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192 | * \param upper : the upper value of the uniform distribution
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193 | */
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194 | triangle_generator(const RealType & lower , const RealType & mode ,const RealType & upper):
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195 | engine(time(NULL)),
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196 | generator(engine, boost::triangle_distribution<RealType>(lower,mode,upper))
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197 | {}
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198 | /*!
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199 | * Get a random number
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200 | */
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201 | RealType operator()() {return generator();}
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202 | /*!
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203 | * Set triangle distribution
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204 | * \param dist : a normal distribution (see boost distributions)
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205 | */
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206 | void distribution( const boost::math::triangular_distribution<RealType> & dist) {
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207 | generator.dist()= boost::triangle_distribution<RealType>(dist.lower(),dist.mode(),dist.upper());
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208 | }
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209 | /*!
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210 | * Set triangle distribution
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211 | * \param lower : the lower value of the uniform distribution
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212 | * \param mode : the mode value of the uniform distribution
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213 | * \param upper : the upper value of the uniform distribution
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214 | */
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215 | void distribution( const RealType & lower ,const RealType & mode ,const RealType & upper) {
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216 | generator.dist()= boost::triangle_distribution<RealType>(lower,mode,upper);
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217 | }
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218 |
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219 | private :
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220 | /*!
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221 | * \brief pseudo random number generator
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222 | */
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223 | PRNG engine;
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224 | /*!
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225 | * \brief the triangle random number generator
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226 | */
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227 | boost::variate_generator<PRNG, boost::triangle_distribution<RealType> > generator;
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228 | };
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229 |
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230 | typedef class triangle_generator<double,boost::mt19937> triangle_rng;
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231 |
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232 | } // namespace rng
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233 | } // namespace math
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234 |
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235 | #endif // __BOOST_RNG__
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