public void Generate(Chunk chunk)
{
for (int x = 0; x < Chunk.XDimension; x++)
{
for (int y = 0; y < Chunk.YDimension; y++)
{
for (int z = 0; z < Chunk.ZDimension; z++)
{
chunk.SetBlockPrototype(new RelativeBlockPosition(x, y, z), BlockPrototype.AirBlock);
}
}
}
}
public void Generate(Chunk chunk)
{
for (int x = 0; x < Chunk.XDimension; x++)
{
for (int y = 0; y < Chunk.YDimension; y++)
{
for (int z = 0; z < Chunk.ZDimension; z++)
{
var blockType = y <= GroundLevel ? BlockPrototype.StoneBlock : BlockPrototype.AirBlock;
chunk.SetBlockPrototype(new RelativeBlockPosition(x, y, z), blockType);
}
}
}
}
double[,,] GenerateDensityMap(Chunk chunk)
{
var primitive = new SimplexPerlin
{
Quality = NoiseQuality.Best,
Seed = 1
};
var terrainFilter = new RidgedMultiFractal
{
Primitive3D = primitive,
Frequency = 1,
Gain = 3f,
Lacunarity = 2,
OctaveCount = 4,
Offset = 1,
SpectralExponent = 0.25f
};
// MultiFractal output seems to vary from 0 to 3ish
var outputScaler = new ScaleBias
{
SourceModule = terrainFilter,
Scale = 2 / 3f,
Bias = -1f
};
// The terrace seems to be useful for smoothing the lower parts while still allowing
// for dramatic mountains
var terrace = new Terrace()
{
SourceModule = outputScaler,
};
terrace.AddControlPoint(-1f);
//terrace.AddControlPoint(-0.5f);
//terrace.AddControlPoint(0f);
//terrace.AddControlPoint(0.5f);
terrace.AddControlPoint(2f);
//terrace.AddControlPoint(0.7f, 0.8f);
var inputScaler = new ScalePoint
{
SourceModule = terrace,
XScale = 0.01f,
YScale = 0.01f,
ZScale = 0.01f
};
var densityMap = new double[Chunk.XDimension + 1,Chunk.YDimension + 1,Chunk.ZDimension + 1];
for (int x = 0; x <= Chunk.XDimension; x += horizontalSampleRate)
{
for (int y = 0; y <= Chunk.YDimension; y += verticalSampleRate)
{
for (int z = 0; z <= Chunk.ZDimension; z += horizontalSampleRate)
{
float worldX = chunk.OriginInWorld.X + x;
float worldY = chunk.OriginInWorld.Y + y;
float worldZ = chunk.OriginInWorld.Z + z;
var noise = inputScaler.GetValue(worldX, worldY, worldZ);
// This applies a gradient to the noise based on height.
// The smaller the gradient value, the longer it takes to drive
// the entire fractal below zero and the more overhang/hole stuff
// we get.
var density = noise - (y * y * y / 600000f) + 2;
//var density = noise - (y / 10f) + 3;
densityMap[x, y, z] = density;
}
}
}
TriLerp(densityMap);
return densityMap;
}
public void GenerateTerrain(Chunk chunk)
{
var densityMap = GenerateDensityMap(chunk);
InitializeChunk(chunk, densityMap);
}
void InitializeChunk(Chunk chunk, double[,,] densityMap)
{
for (int x = 0; x < Chunk.XDimension; x++)
{
for (int y = 0; y < Chunk.YDimension; y++)
{
for (int z = 0; z < Chunk.ZDimension; z++)
{
var prototype = densityMap[x, y, z] > 0 ? BlockPrototype.StoneBlock : BlockPrototype.AirBlock;
chunk.SetBlockPrototype(new RelativeBlockPosition(x, y, z), prototype);
}
}
}
}
//private void GenerateCaves1()
//{
// var primitive = new SimplexPerlin
// {
// Quality = NoiseQuality.Best,
// Seed = 1
// };
// var filter = new HeterogeneousMultiFractal()
// {
// Primitive3D = primitive,
// Frequency = 1,
// Gain = 2,
// Lacunarity = 2,
// OctaveCount = 1,
// Offset = 1,
// SpectralExponent = 0.9f
// };
// _blockArray.Initialize((x, y, z) =>
// {
// if (x > 0 && x < _blockArray.XDimension - 1 && y > 0 && y < _blockArray.YDimension - 1 && z > 0 && z < _blockArray.ZDimension - 1)
// {
// float divisor = 20;
// float filterX = (XDimension * Position.X + x) / divisor;
// float filterY = y / divisor;
// float filterZ = (ZDimension * Position.Z + z) / divisor;
// return filter.GetValue(filterX, filterY, filterZ) < 1.4 ? _prototypeMap[1] : _prototypeMap[0];
// }
// else
// {
// return _prototypeMap[0];
// }
// });
//}
//private void GenerateCaves2()
//{
// var primitive = new SimplexPerlin
// {
// Quality = NoiseQuality.Best,
// Seed = 1
// };
// var filter = new HybridMultiFractal()
// {
// Primitive3D = primitive,
// Frequency = 1,
// Gain = 2,
// Lacunarity = 2,
// OctaveCount = 1,
// Offset = 1,
// SpectralExponent = 0.9f
// };
// _blockArray.Initialize((x, y, z) =>
// {
// if (x > 0 && x < _blockArray.XDimension - 1 && y > 0 && y < _blockArray.YDimension - 1 && z > 0 && z < _blockArray.ZDimension - 1)
// {
// float divisor = 20;
// float filterX = (XDimension * Position.X + x) / divisor;
// float filterY = y / divisor;
// float filterZ = (ZDimension * Position.Z + z) / divisor;
// return filter.GetValue(filterX, filterY, filterZ) < 1.5 ? _prototypeMap[1] : _prototypeMap[0];
// }
// else
// {
// return _prototypeMap[0];
// }
// });
//}
void GenerateSlab(Chunk chunk)
{
for (int x = 0; x < Chunk.XDimension; x++)
{
for (int z = 0; z < Chunk.ZDimension; z++)
{
chunk.SetBlockPrototype(new RelativeBlockPosition(x, 0, z), BlockPrototype.StoneBlock);
}
}
}
public void Generate(Chunk chunk)
{
var terrainGenerator = new TerrainGenerator3();
terrainGenerator.GenerateTerrain(chunk);
}