public IChunk GenerateChunk(IWorld world, Coordinates2D coordinates)
{
const int featurePointDistance = 400;
// TODO: Create a terrain generator initializer function that gets passed the seed etc
int seed = world.Seed;
var worley = new CellNoise(seed);
HighNoise.Seed = seed;
LowNoise.Seed = seed;
CaveNoise.Seed = seed;
var chunk = new Chunk(coordinates);
for (int x = 0; x < 16; x++)
{
for (int z = 0; z < 16; z++)
{
var blockX = MathHelper.ChunkToBlockX(x, coordinates.X);
var blockZ = MathHelper.ChunkToBlockZ(z, coordinates.Z);
const double lowClampRange = 5;
double lowClampMid = LowClamp.MaxValue - ((LowClamp.MaxValue + LowClamp.MinValue) / 2);
double lowClampValue = LowClamp.Value2D(blockX, blockZ);
if (lowClampValue > lowClampMid - lowClampRange && lowClampValue < lowClampMid + lowClampRange)
{
InvertNoise NewPrimary = new InvertNoise(HighClamp);
FinalNoise.PrimaryNoise = NewPrimary;
}
else
{
//reset it after modifying the values
FinalNoise = new ModifyNoise(HighClamp, LowClamp, NoiseModifier.Add);
}
FinalNoise = new ModifyNoise(FinalNoise, BottomClamp, NoiseModifier.Subtract);
var cellValue = worley.Value2D(blockX, blockZ);
var location = new Coordinates2D(blockX, blockZ);
if (world.BiomeDiagram.BiomeCells.Count < 1
|| cellValue.Equals(1)
&& world.BiomeDiagram.ClosestCellPoint(location) >= featurePointDistance)
{
byte id = (SingleBiome) ? GenerationBiome : world.BiomeDiagram.GenerateBiome(seed, Biomes, location);
var cell = new BiomeCell(id, location);
world.BiomeDiagram.AddCell(cell);
}
var biomeId = GetBiome(world, location);
var biome = Biomes.GetBiome(biomeId);
chunk.Biomes[x * Chunk.Width + z] = biomeId;
var height = GetHeight(blockX, blockZ);
var surfaceHeight = height - biome.SurfaceDepth;
chunk.HeightMap[x * Chunk.Width + z] = height;
// TODO: Do not overwrite blocks if they are already set from adjacent chunks
for (int y = 0; y <= height; y++)
{
double cave = 0;
if (!EnableCaves)
cave = double.MaxValue;
else
cave = CaveNoise.Value3D((blockX + x) / 2, y / 2, (blockZ + z) / 2);
double threshold = 0.05;
if (y < 4)
threshold = double.MaxValue;
else
{
if (y > height - 8)
threshold = 8;
}
if (cave < threshold)
{
if (y == 0)
chunk.SetBlockID(new Coordinates3D(x, y, z), BedrockBlock.BlockID);
else
{
if (y.Equals(height) || y < height && y > surfaceHeight)
chunk.SetBlockID(new Coordinates3D(x, y, z), biome.SurfaceBlock);
else
{
if (y > surfaceHeight - biome.FillerDepth)
chunk.SetBlockID(new Coordinates3D(x, y, z), biome.FillerBlock);
else
chunk.SetBlockID(new Coordinates3D(x, y, z), StoneBlock.BlockID);
}
}
}
}
}
}
foreach (var decorator in ChunkDecorators)
decorator.Decorate(world, chunk, Biomes);
chunk.TerrainPopulated = true;
return chunk;
}
public void AddCell(BiomeCell cell)
{
BiomeCells.Add(cell);
}