public static bool GetRandomStartDurationTimeFrequency(int distribution, Time tstart, int min, int max, Random random, out Time startTime)
{
int start = TimeOfDayToDistribution(tstart);
float[][] pdf = Distributions[distribution].Durations;
if (start == Scheduler.StartTimeQuanta)
{
start = 0;
}
float rand = (float)random.NextDouble();
float pdfFactor = 0.0f;
for (int i = min; i <= max; ++i)
{
pdfFactor += pdf[start][i];
}
if (pdfFactor == 0)
{
startTime = Time.Zero;
return(false);
}
rand *= pdfFactor;
float cdf = 0.0f;
for (int i = min; i <= max; ++i)
{
cdf += pdf[start][i];
if (rand < cdf)
{
if (i == 0)
{
startTime = Distribution.DistributionToDuration(1);
}
else
{
startTime = Distribution.DistributionToDuration(i);;
}
if (startTime == Time.Zero)
{
throw new XTMFRuntimeException("Tried to create a zero duration episode!");
}
return(true);
}
}
// if we get here, it was the last one but off due to rounding errors
startTime = Distribution.DistributionToDuration(max);
return(true);
}
