public static byte PerlinNoise(Vector3 pos, double densityDivisor, int seed)
{
PerlinNoise perlinNoise = new PerlinNoise(seed);
//Vector3 warp;
//warp.X = (float)perlinNoise.Noise(pos.X * 0.004, pos.X * 0.004, pos.X * 0.004);
//warp.Y = (float)perlinNoise.Noise(pos.Y * 0.004, pos.Y * 0.004, pos.Y * 0.004);
//warp.Z = (float)perlinNoise.Noise(pos.Z * 0.004, pos.Z * 0.004, pos.Z * 0.004);
//pos += warp * 8;
double widthDivisor = 1 / (double)densityDivisor / 2;
double heightDivisor = 1 / (double)densityDivisor * 3;
double depthDivisor = 1 / (double)densityDivisor / 2;
double v =
// First octave
(perlinNoise.Noise(2 * pos.X * widthDivisor, 2 * pos.Y * heightDivisor, -2 * pos.Z * depthDivisor) + 1) / 2 * 0.7 +
// Second octave
(perlinNoise.Noise(-8 * pos.X * widthDivisor, 4 * pos.Y * heightDivisor, 8 * pos.Z * depthDivisor) + 1) / 2 * 0.2 +
// Third octave
(perlinNoise.Noise(16 * pos.X * widthDivisor, 8 * pos.Y * heightDivisor, -16 * pos.Z * depthDivisor) + 1) / 2 * 0.1;
// generate a sphere
//float rad = 30;
//float dist = rad - (pos - new Vector3(0, rad, 0)).Length();
//dist = dist.Scale(0, rad, 0, 0.5f);
//v = dist + v;
// clamp to 0 - 1
//v = Math.Min(1, Math.Max(0, v));
v = MathHelper.Clamp((float)v, 0, 1);
byte density = (byte)(v * 255);
return density;
}
public static byte PerlinNoise(Vector3 pos, double densityDivisor, int seed)
{
PerlinNoise perlinNoise = new PerlinNoise(seed);
double widthDivisor = 1 / (double)densityDivisor;
double heightDivisor = 1 / (double)densityDivisor;
double depthDivisor = 1 / (double)densityDivisor;
double v =
// First octave
(perlinNoise.Noise(2 * pos.X * widthDivisor, 2 * pos.Y * heightDivisor, -2 * pos.Z * depthDivisor) + 1) / 2 * 0.7 +
// Second octave
(perlinNoise.Noise(4 * pos.X * widthDivisor, 4 * pos.Y * heightDivisor, 2 * pos.Z * depthDivisor) + 1) / 2 * 0.2;
// Third octave
//(perlinNoise.Noise(8 * pos.X * widthDivisor, 8 * pos.Y * heightDivisor, 2 * pos.Z * depthDivisor) + 1) / 2 * 0.1;
// clamp to 0 - 1
v = Math.Min(1, Math.Max(0, v));
byte density = (byte)(v * 255);
return density;
}