/// <summary>
/// Returns random double according to specified settings.
/// </summary>
/// <param name="rand"></param>
/// <param name="settings">Encapsulated settings</param>
public static double NextDouble(this Random rand, RandomValueSettings settings)
{
double value;
switch (settings.DistrType)
{
case DistributionType.Uniform:
value = rand.NextRangedUniformDouble(settings.Min, settings.Max);
break;
case DistributionType.Gaussian:
if (settings.DistrCfg != null)
{
RandomValueSettings.GaussianDistrSettings gaussianCfg = settings.DistrCfg as RandomValueSettings.GaussianDistrSettings;
value = rand.NextFilterredGaussianDouble(gaussianCfg.Mean, gaussianCfg.StdDev, settings.Min, settings.Max);
}
else
{
throw new Exception($"Configuration of Gaussian distribution is missing");
}
break;
case DistributionType.Exponential:
if (settings.DistrCfg != null)
{
RandomValueSettings.ExponentialDistrSettings exponentialCfg = settings.DistrCfg as RandomValueSettings.ExponentialDistrSettings;
value = rand.NextFilterredExponentialDouble(exponentialCfg.Mean, settings.Min, settings.Max);
}
else
{
throw new Exception($"Configuration of Exponential distribution is missing");
}
break;
case DistributionType.Gamma:
if (settings.DistrCfg != null)
{
RandomValueSettings.GammaDistrSettings gammaCfg = settings.DistrCfg as RandomValueSettings.GammaDistrSettings;
value = rand.NextFilterredGammaDouble(gammaCfg.Alpha, gammaCfg.Beta, settings.Min, settings.Max);
}
else
{
throw new Exception($"Configuration of Gamma distribution is missing");
}
break;
default:
throw new Exception($"Unknown distribution type {settings.DistrType}.");
}
if (settings.RandomSign)
{
value *= rand.NextSign();
}
return(value);
}
/// <summary>
/// Returns positive random double following the Gamma distribution.
/// </summary>
/// <param name="rand"></param>
/// <param name="distrParams">Gamma distribution parameters</param>
public static double NextGammaDouble(this Random rand, RandomValueSettings.GammaDistrSettings distrParams)
{
return(NextGammaDouble(rand, distrParams.Alpha, distrParams.Beta));
}