private IEnumerable <Entity> SpawnEntitiesUsingRandomDistribution(EntitySpawnPoint entitySpawnPoint, List <UwePrefab> prefabs, DeterministicBatchGenerator deterministicBatchGenerator)
{
List <UwePrefab> allowedPrefabs = FilterAllowedPrefabs(prefabs, entitySpawnPoint);
float rollingProbabilityDensity = allowedPrefabs.Sum(prefab => prefab.Probability / entitySpawnPoint.Density);
if (rollingProbabilityDensity <= 0)
{
yield break;
}
double randomNumber = deterministicBatchGenerator.NextDouble();
if (rollingProbabilityDensity > 1f)
{
randomNumber *= rollingProbabilityDensity;
}
double rollingProbability = 0;
UwePrefab selectedPrefab = allowedPrefabs.FirstOrDefault(prefab =>
{
if (prefab.Probability == 0)
{
return(false);
}
float probabilityDensity = prefab.Probability / entitySpawnPoint.Density;
rollingProbability += probabilityDensity;
return(rollingProbability >= randomNumber);
});
if (selectedPrefab == null)
{
yield break;
}
Optional <UweWorldEntity> opWorldEntity = worldEntityFactory.From(selectedPrefab.ClassId);
if (opWorldEntity.IsPresent())
{
UweWorldEntity uweWorldEntity = opWorldEntity.Get();
for (int i = 0; i < selectedPrefab.Count; i++)
{
IEnumerable <Entity> entities = CreateEntityWithChildren(entitySpawnPoint,
uweWorldEntity.Scale,
uweWorldEntity.TechType,
uweWorldEntity.CellLevel,
selectedPrefab.ClassId,
deterministicBatchGenerator);
foreach (Entity entity in entities)
{
yield return(entity);
}
}
}
}
public override List <UwePrefab> GetPossiblePrefabs(string biome)
{
List <UwePrefab> prefabs = new List <UwePrefab>();
if (biome == null)
{
return(prefabs);
}
BiomeType biomeType = (BiomeType)Enum.Parse(typeof(BiomeType), biome);
if (lootDistributionData.GetBiomeLoot(biomeType, out DstData dstData))
{
foreach (PrefabData prefabData in dstData.prefabs)
{
UwePrefab prefab = new UwePrefab(prefabData.classId, prefabData.probability, prefabData.count);
prefabs.Add(prefab);
}
}
return(prefabs);
}