public GameObject NextSpawn()
{
if (null == random)
{
random = new UnityRandom();
}
WeightedRandom wr = new WeightedRandom(random);
float totalWeight = 0.0f;
foreach (Item item in spawnItems)
{
totalWeight += item.weight;
wr.Add(new Weight(item.weight, item));
}
var weight = wr.ChooseRandom();
if (null == weight)
{
return(null);
}
if (null == weight.target)
{
return(null);
}
return(((Item)weight.target).spawnObject);
}
public void UnitTests()
{
var fixedRandom = new FixedRandom();
var test = new WeightedRandom(fixedRandom);
var w1 = new Weight(1.0f);
var w2 = new Weight(0.5f);
var w3 = new Weight(0.25f);
var totalWeight = w1.Value + w2.Value + w3.Value;
test.Add(w1);
test.Add(w2);
test.Add(w3);
Assert.AreEqual(w1, test.ChooseFactor(.5f / totalWeight));
Assert.AreEqual(w1, test.ChooseFactor(.9f / totalWeight));
Assert.AreEqual(w2, test.ChooseFactor(1.1f / totalWeight));
Assert.AreEqual(w3, test.ChooseFactor(1.6f / totalWeight));
}
