public static IEnumerable <long> ProcessTick(CohortCollection cohorts, out PopulationChangeStats stats)
{
var newPops = new long[cohorts.Cohorts.Count];
var totalDeaths = 0L;
var racialTemplate = cohorts.RacialTemplate;
var fertileFemales =
(cohorts.GetPopulationWithAllFeatures(CohortFeatures.Fertile) / 2) +
(cohorts.GetPopulationWithAllFeatures(CohortFeatures.LowFertile) / 4);
var births = (long)(racialTemplate.BirthRatePerTick * fertileFemales);
var graduatingCount = births;
for (int i = 0; i < racialTemplate.CohortTemplates.Count; i++)
{
var cohortSize = cohorts.Cohorts[i].Population;
var deathCount = (long)(cohorts.RacialTemplate.GetAverageDeathRatePerTick(i) * cohortSize);
totalDeaths += deathCount;
var newCohortSize = cohortSize - deathCount + graduatingCount;
var template = racialTemplate.CohortTemplates[i];
graduatingCount = cohortSize / (template.PastEndAge - template.StartAge).TickOffset;
newCohortSize -= graduatingCount;
newPops[i] = newCohortSize;
}
totalDeaths += graduatingCount;
stats = new PopulationChangeStats(TimeOffset.OneTick, totalDeaths, births);
return(newPops);
}
public void PopulationDistributionTest()
{
var cohorts = new CohortCollection(m_racialTemplate);
cohorts.DistributePopulationAcrossCohorts(1000000000);
var stats = new PopulationChangeStats(new TimeOffset(0), 0, 0);
var maxDate = new TimePoint((long)(Constants.DaysPerYear * 1));
for (var date = new TimePoint(0); date < maxDate; date += TimeOffset.OneTick)
{
var newPops = PopulationUtility.ProcessTick(cohorts, out var tickStats);
cohorts = cohorts.CloneWithNewPopulations(newPops);
stats += tickStats;
}
}
