public T LuckyDraw(IRandomGenerator randomGenerator, ILuckier luckier, Func <float, float, float> luckinessAdjustmentFunc)
{
if (randomGenerator == null)
{
throw new ArgumentNullException("randomGenerator");
}
if (luckier == null)
{
throw new ArgumentNullException("luckier");
}
if (luckier.Luckyness <= 0)
{
throw new ArgumentOutOfRangeException("luckier", luckier.Luckyness, "Luckyness must greater than zero.");
}
if (undelyingList.Count <= 0)
{
return(default(T));
}
float randomValue = 0, enumeratedValue = 0;
var item = undelyingList[0];
foreach (var rpitem in undelyingList)
{
randomValue += CountWeight(luckier.Luckyness, rpitem.rare);
}
randomValue *= randomGenerator.Random();
foreach (var rpitem in undelyingList)
{
enumeratedValue += CountWeight(luckier.Luckyness, rpitem.rare);
if (enumeratedValue > randomValue)
{
break;
}
item = rpitem;
}
luckier.Luckyness = luckinessAdjustmentFunc(luckier.Luckyness, item.rare);
return(item.item);
}
public T LuckyDraw(IRandomGenerator randomGenerator, ILuckier luckier)
{
return(LuckyDraw(randomGenerator, luckier, LuckinessAdjustment));
}
public T LuckyDraw(ILuckier luckier)
{
return(LuckyDraw(RandomGenerator.DefaultInstance, luckier, LuckinessAdjustment));
}
