/// <summary>
/// Simulate a test population until all original people are deceased and use the
/// final population distribution as a basis for distributing newly created populations.
/// </summary>
private static IReadOnlyList <double> GetDistributionRatios(RacialTemplate racialTemplate)
{
long testPopulation = 1000000;
var ageRange = (double)racialTemplate.CohortTemplates.Sum(x => (x.PastEndAge - x.StartAge).TickOffset);
var pops = racialTemplate.CohortTemplates
.Select(cohortTemplate =>
{
var cohortAgeRange = (double)(cohortTemplate.PastEndAge - cohortTemplate.StartAge).TickOffset;
return((long)((double)testPopulation * cohortAgeRange / ageRange));
});
var testCohorts = new CohortCollection(racialTemplate, pops);
var maxDate = new TimePoint(0) + testCohorts.Cohorts.Last().PastEnd;
for (var date = new TimePoint(0); date < maxDate; date += TimeOffset.OneTick)
{
testCohorts = new CohortCollection(racialTemplate, PopulationUtility.ProcessTick(testCohorts, out var _));
}
var finalTestPopulation = (double)testCohorts.TotalPopulation;
return(testCohorts.Cohorts
.Select(x => (double)x.Population / finalTestPopulation)
.AsReadOnlyList());
}
private CohortCollection(CohortCollection that, IEnumerable <long> populations)
: this(that.RacialTemplate, populations.Select((pop, i) => new CohortImpl(that.RacialTemplate.CohortTemplates[i], pop)).ToArray(), that.m_distributionRatios)
{
}
private CohortCollection(CohortCollection that)
: this(that.RacialTemplate, that.m_cohorts.Select(x => x.Clone()).ToArray(), that.m_distributionRatios)
{
}