// Cribbed, with love, from http://hyperfoxstudios.com/loot-drop-table-implementation-unity3d/
void ValidateAndCacheSpawnTable(List <EnemySpawnGroupData> newSpawnTable)
{
cachedSpawnTable = DataRetriever.GetEnemySpawnGroups();
float currentProbabilityWeightTotal = 0f;
for (int i = 0; i < cachedSpawnTable.Count; i++)
{
EnemySpawnGroupData spawnGroup = cachedSpawnTable[i];
spawnGroup.probabilityRangeFrom = currentProbabilityWeightTotal;
currentProbabilityWeightTotal += spawnGroup.probabilityWeight;
spawnGroup.probabilityRangeTo = currentProbabilityWeightTotal;
}
probabilityTotalWeight = currentProbabilityWeightTotal;
}
public EnemySpawnGroupData GetEnemySpawnGroup(int depth, float nodeDistance)
{
if (depth != cachedDepth)
{
List <EnemySpawnGroupData> newSpawnTable = DataRetriever.GetEnemySpawnGroups();
if (newSpawnTable != null && newSpawnTable.Count > 0)
{
ValidateAndCacheSpawnTable(newSpawnTable);
cachedDepth = depth;
}
}
float scaledNodeDistance = probabilityTotalWeight * nodeDistance;
float scaledVariance = Mathf.RoundToInt(probabilityTotalWeight * nodeDistanceVariance);
float adjustedDistance = scaledNodeDistance + Random.Range(-scaledVariance, scaledVariance);
adjustedDistance = Mathf.Max(0, adjustedDistance);
adjustedDistance = Mathf.Min(probabilityTotalWeight, adjustedDistance);
return(PickSpawnGroup(adjustedDistance));
}