WeightedObject DetectWeightedRandom(WeightedObject[] weightedPrefabs)
{
WeightedObject weightedObject = null;
float totalWeight = 0;
for (int i0 = 0; i0 < weightedPrefabs.Length; ++i0)
{
totalWeight += weightedPrefabs[i0].weight;
}
float border = totalWeight * (float)random.NextDouble();
for (int i0 = 0; i0 < weightedPrefabs.Length; ++i0)
{
float weight = weightedPrefabs[i0].weight;
if (Mathf.Approximately(weight, 0) == false)
{
if (border <= weight)
{
weightedObject = weightedPrefabs[i0];
break;
}
border -= weight;
}
}
return(weightedObject);
}
public List <GameObject> PlaceObjects(PlacementParameter parameter, List <SurroundedArea> areas, Transform parent = null)
{
var objects = new List <GameObject>();
var copyAreas = new List <SurroundedArea>(areas);
int count = copyAreas.Count;
int max = Mathf.RoundToInt((float)count * parameter.placementRate);
var objectCountMap = new Dictionary <string, int>();
for (int i0 = 0; i0 < max; ++i0)
{
int randomIndex = random.Next(count);
List <Vector3> points = copyAreas[randomIndex].AreaPoints;
Vector3 center = CalcCenter(points);
WeightedObject weightedObject = DetectWeightedRandom(parameter.weightedPrefabs);
if (weightedObject != null)
{
GameObject prefab = weightedObject.gameObject;
if (prefab == null)
{
Debug.LogError($"抽選されたプレハブがnullです。");
}
GameObject obj = Object.Instantiate(prefab);
Transform transform = obj.transform;
transform.SetParent(parent);
string prefabName = prefab.name;
if (objectCountMap.ContainsKey(prefabName) == false)
{
objectCountMap.Add(prefabName, 0);
}
obj.name = $"{prefabName}{objectCountMap[prefabName]}";
++objectCountMap[prefabName];
Vector3 prefabScale = prefab.transform.localScale;
float heightScale = Mathf.Lerp(weightedObject.minHeightScale, weightedObject.maxHeightScale, (float)random.NextDouble());
float horizontalScale = Mathf.Lerp(weightedObject.minHorizontalScale, weightedObject.maxHorizontalScale, (float)random.NextDouble());
transform.localScale = new Vector3(prefabScale.x * horizontalScale, prefabScale.y * heightScale, prefabScale.z * horizontalScale);
if (weightedObject.rotatable != false)
{
float angle = 360.0f * (float)random.NextDouble();
transform.Rotate(0, angle, 0);
}
transform.position = center;
objects.Add(obj);
}
--count;
copyAreas[randomIndex] = copyAreas[count];
copyAreas.RemoveAt(count);
}
return(objects);
}
