static void MakePerlinNoise3D(double[, ,] toFill, Vector3i fillStart, PerlinNoiseSettings3D settings)
{
int width;
int height;
int length;
int effectiveX;
int effectiveY;
int effectiveZ;
Vector3 regionSize = new Vector3();
double frequency;
double amplitude;
width = settings.size.X;
height = settings.size.Y;
length = settings.size.Z;
regionSize.X = width / settings.zoom;
regionSize.Y = width / settings.zoom;
regionSize.Z = width / settings.zoom;
for (int x = fillStart.X; x < fillStart.X + width; x++)
{
for (int y = fillStart.Y; y < fillStart.Y + height; y++)
{
for (int z = fillStart.Z; z < fillStart.Z + length; z++)
{
effectiveX = x + settings.startingPoint.X;
effectiveY = y + settings.startingPoint.Y;
effectiveZ = z + settings.startingPoint.Z;
frequency = 1;
amplitude = 1;
for (int oct = 0; oct < settings.octaves; oct++)
{
double noise = SimpleNoise3D.GenInterpolatedNoise(effectiveX / settings.zoom * frequency,
effectiveY / settings.zoom * frequency,
effectiveZ / settings.zoom * frequency,
settings.seed);
toFill[x, y, z] += amplitude * noise;
frequency *= settings.frequencyMulti;
amplitude *= settings.persistence;
}
}
}
}
}
private void populatePremutations()
{
flatPremutationList = new float[premutationSize * premutationSize * premutationSize];
int index;
for (int x = 0; x < premutationSize; x++)
{
for (int y = 0; y < premutationSize; y++)
{
for (int z = 0; z < premutationSize; z++)
{
index = x * premutationSize * premutationSize + y * premutationSize + z;
flatPremutationList[index] = SimpleNoise3D.GenFloatNoise(rng.Next(), rng.Next(), rng.Next(), settings.seed);
}
}
}
}
