/// <summary>
/// Choses which terrain generator to use for a single chunk.
/// </summary>
/// <returns></returns>
private int ChooseTerrainGenerator(int[,] terrainMap, WeightedRandom randomTerrainGenerators, int x, int y, Random seededRandom)
{
//<terrainGenerator, weight>
List <ValueTuple <int, int> > neighborGeneratorWeights = new List <(int, int)>();
//The total weight of neighboring terrain generators.
int totalWeight = 0;
if (terrainMap[x, y] != -1)
{
int index = neighborGeneratorWeights.FindIndex(a => a.Item1 == terrainMap[x, y]);
if (index == -1)
{
neighborGeneratorWeights.Add((terrainMap[x, y], 1));
}
else
{
neighborGeneratorWeights[index] = (neighborGeneratorWeights[index].Item1, neighborGeneratorWeights[index].Item2 + 1);
}
totalWeight += CoreSettingsHandler.GenerationSettings.Settings.NeighborWeight;
}
List <int> weights = new List <int>();
foreach ((int, int)item in neighborGeneratorWeights)
{
int weightToAdd = item.Item2 * CoreSettingsHandler.GenerationSettings.Settings.NeighborWeight;
weights.Add(weightToAdd);
}
if (totalWeight < 100)
{
//Add the chance for a new terrain generator to be used, not a neighboring one
weights.Add(100 - totalWeight);
}
WeightedRandom neighborWeightedRandom = new WeightedRandom(weights, seededRandom);
int terrainGeneratorIndex = neighborWeightedRandom.GetNext();
if (terrainGeneratorIndex == weights.Count - 1)
{
//Use new terrain generator,
return(randomTerrainGenerators.GetNext());
}
else
{
//Use the chosen terrain generator.
return(neighborGeneratorWeights[terrainGeneratorIndex].Item1);
}
}
