public bool IsEqualTo(NoiseParams ns)
{
return(Seed == ns.Seed &&
Octaves == ns.Octaves &&
Lacunarity == ns.Lacunarity &&
Persistence == ns.Persistence &&
InitialAmplitude == ns.InitialAmplitude &&
InitialFrequency == ns.InitialFrequency &&
NoiseSize == ns.NoiseSize &&
Offset == ns.Offset &&
UseKernel == ns.UseKernel);
}
public void Set(NoiseParams ns)
{
Seed = ns.Seed;
Octaves = ns.Octaves;
Lacunarity = ns.Lacunarity;
Persistence = ns.Persistence;
InitialAmplitude = ns.InitialAmplitude;
InitialFrequency = ns.InitialFrequency;
NoiseSize = ns.NoiseSize;
Offset = ns.Offset;
UseKernel = ns.UseKernel;
}
private static float[,] CreateNoise2D(NoiseParams noiseSettings)
{
var noise = new OpenSimplexNoise(noiseSettings.Seed);
var data = new float[noiseSettings.NoiseSize, noiseSettings.NoiseSize];
for (var y = 0; y < data.GetLength(1); y++)
{
for (var x = 0; x < data.GetLength(0); x++)
{
var amplitude = noiseSettings.InitialAmplitude;
var frequency = noiseSettings.InitialFrequency;
var totalAmplitude = 0f;
var total = 0f;
var xEval = x + noiseSettings.Offset.X;
var yEval = y + noiseSettings.Offset.Y;
for (var o = 1; o < noiseSettings.Octaves + 1; o++)
{
var noisev = (float)noise.Evaluate(xEval * frequency, yEval * frequency);
// [[-1, 1] -> [0, 1]
noisev = (noisev + 1) / 2;
noisev *= amplitude;
total += noisev;
totalAmplitude += amplitude;
amplitude *= noiseSettings.Persistence;
frequency *= noiseSettings.Lacunarity;
}
// normalise
total /= totalAmplitude;
data[x, y] = total;
}
}
var dd = NormaliseNoise2D(data);
if (noiseSettings.UseKernel)
{
var identityKernel = new float[, ] {
{ 1f }
};
var smoothingKernel = new float[, ]
{
{ 1f, 1f, 1f },
{ 1f, 1f, 1f },
{ 1f, 1f, 1f },
};
var sharpenKernel = new float[, ]
{
{ 0f, -1f, 0f },
{ -1f, 5f, -1f },
{ 0f, -1f, 0f },
};
var outlineKernel = new float[, ]
{
{ -1f, -1f, -1f },
{ -1f, 8f, -1f },
{ -1f, -1f, -1f },
};
var topSobel = new float[, ]
{
{ 1f, 2f, 1f },
{ 0f, 0f, 0f },
{ -1f, -2f, -1f },
};
dd = ApplyKernel(dd, topSobel);
}
var erosion = new Erosion();
var dmap = To1D(dd);
//erosion.Erode(dmap, 256, 10, false);
dd = To2D(dmap);
var res = AddBorder(dd);
return(res);
}
