private static IHeightMap GenerateRocks(int seed, int x, int y, double density)
{
CellularAutomaton ca = new CellularAutomaton(seed, new RuleSet(Lerp(0.1, 0.3, density), false, (region, generation) => region.GetNeighbors() > 2));
IHeightMap layer1 = new BooleanMap(ca.Generate(x, y, 4));
IHeightMap layer2 = new BooleanMap(ca.Generate(x, y, 2));
return(new HeightMap(2, ValueArray.Create(x, y, (i, j) => layer1[i, j] + layer2[i, j])));
}
public Cave(int seed, int x, int y, double wallDensity, double rockDensity)
{
Random random = new Random(seed);
bool[,] bounds = GenerateBounds(random.Next(), x, y, 5, -1);
bool[,] walls = GenerateWalls(random.Next(), x, y, wallDensity);
bool[,] map = ValueArray.Create(x, y, (i, j) => bounds[i, j] || walls[i, j]);
MainArea = FillHoles(map);
IHeightMap rocks = GenerateRocks(random.Next(), x, y, rockDensity);
SizeX = x;
SizeY = y;
MaxHeight = rocks.MaxHeight + 1;
this.map = new HeightMap(MaxHeight, ValueArray.Create(x, y, (i, j) => map[i, j] ? MaxHeight : rocks[i, j]));
}