static void Main(string[] args)
{
var noiseSource = new SimplexPerlin
{
Seed = 0,
Quality = NoiseQuality.Fast
};
var min = 0f;
var max = 0f;
for (int x = 0; x < 100; x++)
{
for (int z = 0; z < 100; z++)
{
var val = noiseSource.GetValue(x, z);
if (val < min)
{
min = val;
}
if (val > max)
{
max = val;
}
}
}
Console.Write(min + " " + max);
Console.ReadKey();
}
public override void Update()
{
base.Update();
Offset += Velocity;
Velocity += Util.AngleToVector(DriftAngle) * DriftSpeed;
Velocity = Velocity.ClampLength(0, VelocityMax);
float driftAngleVelocity = Noise.GetValue(Frame.Slide, RandomOffset);
DriftAngle += driftAngleVelocity;
}
public override double Execute(double x, double y, double z, CallableNode flow)
{
var altitude = baseAltitude + simplexAltitude.GetValue(x * frequencyAltitude, z * frequencyAltitude) * scaleAltitude;
if (y < altitude - tunnelsHeight - HeightMargin || y > altitude + tunnelsHeight + HeightMargin)
{
return(-HeightMargin);
}
var network = Math.Min(ridgedMultiFractal.GetValue(x, z), 1.0 - (1.0 - threshold) * 0.333333);
var tunnel = network - threshold;
var sign = tunnel < 0 ? -1.0 : 1.0;
tunnel = sign * Math.Sqrt(Math.Abs(tunnel));
return(tunnelsHeight * tunnel - Math.Abs(y - altitude)
+ scalePerturbation * simplexPerturbation.GetValue(x * frequencyPerturbation, y * frequencyPerturbation, z * frequencyPerturbation)
+ scaleMicroPerturbation * simplexPerturbation.GetValue(x * frequencyMicroPerturbation, y * frequencyMicroPerturbation, z * frequencyMicroPerturbation));
}
internal GcRandom(ChunkColumn chunki, int seed)
{
Chunk = chunki;
_subtractForLessThanCutoff = _amplitude1 - _cutOff;
_f1Xz = 1.0 / _sxz;
_f1Y = 1.0 / _sy;
if (_maxCaveHeight - _minCaveHeight > 128)
{
_caveBandBuffer = 32;
}
else
{
_caveBandBuffer = 16;
}
_noiseGen1 = new SimplexPerlin(seed, NoiseQuality.Fast);
_noiseGen2 = new SimplexPerlin((int)_noiseGen1.GetValue(Chunk.X, Chunk.Z), NoiseQuality.Fast);
_noiseGen3 = new SimplexPerlin((int)_noiseGen1.GetValue(Chunk.X, Chunk.Z), NoiseQuality.Fast);
}
internal GCRandom(ChunkColumn chunki, int seed)
{
chunk = chunki;
subtractForLessThanCutoff = amplitude1 - CutOff;
f1xz = 1.0 / sxz;
f1y = 1.0 / sy;
if (MaxCaveHeight - MinCaveHeight > 128)
{
caveBandBuffer = 32;
}
else
{
caveBandBuffer = 16;
}
noiseGen1 = new SimplexPerlin(seed, NoiseQuality.Fast);
noiseGen2 = new SimplexPerlin((int)noiseGen1.GetValue(chunk.X, chunk.Z), NoiseQuality.Fast);
noiseGen3 = new SimplexPerlin((int)noiseGen1.GetValue(chunk.X, chunk.Z), NoiseQuality.Fast);
}
private SimplexPerlin CreateSimplexPerlin()
{
SimplexPerlin tmp = new SimplexPerlin(0, NoiseQuality.Best);
int s = 0;
for (int i = 0; i < Taste.Length; i++)
{
s += (int)tmp.GetValue((int)Taste[i], -i, NoiseRange.Byte);
}
tmp = null;
return(new SimplexPerlin(s, NoiseQuality.Best));
}
public bool IsInCave(int x, int y, int z)
{
float xx = (Chunk.X << 4) | (x & 0xF);
float yy = y;
float zz = (Chunk.Z << 4) | (z & 0xF);
double n1 = (_noiseGen1.GetValue((float)(xx * _f1Xz), (float)(yy * _f1Y), (float)(zz * _f1Xz)) * _amplitude1);
double n2 = (_noiseGen2.GetValue((float)(xx * _f2Xz), (float)(yy * _f2Y), (float)(zz * _f2Xz)) * _amplitude2);
double n3 = (_noiseGen3.GetValue((float)(xx * _f3Xz), (float)(yy * _f3Y), (float)(zz * _f3Xz)) * _amplitude3);
var lc = LinearCutoffCoefficient(y);
var isInCave = n1 + n2 - n3 - lc > 62;
return(isInCave);
}
public bool IsInCave(int x, int y, int z)
{
float xx = (chunk.X << 4) | (x & 0xF);
float yy = y;
float zz = (chunk.Z << 4) | (z & 0xF);
double n1 = (noiseGen1.GetValue((float)(xx * f1xz), (float)(yy * f1y), (float)(zz * f1xz)) * amplitude1);
double n2 = (noiseGen2.GetValue((float)(xx * f2xz), (float)(yy * f2y), (float)(zz * f2xz)) * amplitude2);
double n3 = (noiseGen3.GetValue((float)(xx * f3xz), (float)(yy * f3y), (float)(zz * f3xz)) * amplitude3);
var lc = LinearCutoffCoefficient(y);
var isInCave = n1 + n2 - n3 - lc > 62;
return(isInCave);
}
private float GetNoise2D(int octaves, float persistence, float scale, int x, int y)
{
float total = 0;
float frequency = scale;
float amplitude = 1;
// We have to keep track of the largest possible amplitude,
// because each octave adds more, and we need a value in [-1, 1].
float maxAmplitude = 0;
for (int i = 0; i < octaves; i++)
{
total += moistureNoise.GetValue(x * frequency, y * frequency) * amplitude;
frequency *= 2;
maxAmplitude += amplitude;
amplitude *= persistence;
}
return(total / maxAmplitude);
}
private Tile GenerateTile(int x, int y)
{
var z = (simplexPerlin.GetValue(x * Constants.generatorZoom, y * Constants.generatorZoom) + 1) / 2;
var vec = new Vector2(x, y);
if (z < 0.05)
{
return(new WaterTile(vec));
}
if (z > 0.05 && z < 0.8)
{
return(new GrassTile(vec));
}
if (z > 0.8)
{
return(new StoneTile(vec));
}
return(new DirtTile(vec));
}
public INoiseMap <float> GenerateMap(int mapWidth = 512, int mapHeight = 512, float scale = 1, int seed = 0)
{
if (mapWidth <= 0)
{
throw new ArgumentException("mapWidth should be greater than 0");
}
if (mapHeight <= 0)
{
throw new ArgumentException("mapHeight should be greater than 0");
}
if (scale <= 0)
{
throw new ArgumentException("scale should be greater than 0");
}
var perlineNoiseSource = new SimplexPerlin
{
Seed = seed,
Quality = NoiseQuality.Fast
};
var noiseMap = new float[mapWidth, mapHeight];
for (int y = 0; y < mapHeight; y++)
{
for (int x = 0; x < mapWidth; x++)
{
var sampleX = x / scale;
var sampleY = y / scale;
var perlinValue = perlineNoiseSource.GetValue(sampleX, sampleY);
noiseMap[x, y] = perlinValue;
}
}
return(new NoiseMap(MapWidth: mapWidth, MapHeight: mapHeight, Data: noiseMap));
}
private static float getRawNoise(ivec2 chunkPos, ivec2 blockPos, float scale, float frequency = 1f, float amplitude = 1f)
{
vec2 noisePos = (new vec2(chunkPos) + new vec2(blockPos) / 16f) * frequency / scale;
return(glm.Clamp(_noiseGen.GetValue(noisePos.x, noisePos.y), -1, 1) * amplitude);
}
public override double Execute(double x, double y, double z, CallableNode flow)
{
return(simplex.GetValue(x * frequency, y * frequency, z * frequency) * scale);
}