void GenPointsMasked(Image <Rgba32> buffer)
{
var o = PointSize - 1;
var random = new Random(Seed);
var noise = new RustNoise(MaskNoiseType);
noise.SetSeed(MaskSeed);
noise.SetFrequency(MaskFrequency);
noise.SetPersistence(MaskPersistence);
noise.SetLacunarity(MaskLacunarity);
noise.SetOctaves(MaskOctaves);
noise.SetPeriodX(buffer.Width);
noise.SetPeriodY(buffer.Height);
var threshVal = 1 / (1 - MaskThreshold);
var powFactor = 1 / MaskPower;
const int MaxPointAttemptCount = 9999;
int PointAttemptCount = 0;
for (int i = 0; i < PointCount; i++)
{
var relX = random.NextDouble();
var relY = random.NextDouble();
var x = (int)(relX * buffer.Width);
var y = (int)(relY * buffer.Height);
// Grab noise at this point.
var noiseVal = Math.Min(1, Math.Max(0, (noise.GetNoise(x, y) + 1) / 2));
// Threshold
noiseVal = Math.Max(0, noiseVal - MaskThreshold);
noiseVal *= threshVal;
noiseVal = Math.Pow(noiseVal, powFactor);
var randomThresh = random.NextDouble();
if (randomThresh > noiseVal)
{
if (++PointAttemptCount <= MaxPointAttemptCount)
{
i--;
}
continue;
}
var dist = random.NextDouble();
for (int ox = x - o; ox <= x + o; ox++)
{
for (int oy = y - o; oy <= y + o; oy++)
{
var color = Util.ColorMix(CloseColor, FarColor, (float)dist).Convert();
buffer[Util.SaneMod(ox, buffer.Width), Util.SaneMod(oy, buffer.Height)] = color;
}
}
}
}
public override void Apply(Image <Rgba32> bitmap)
{
var noise = new RustNoise(NoiseType);
noise.SetSeed(Seed);
noise.SetFrequency(Frequency);
noise.SetPersistence(Persistence);
noise.SetLacunarity(Lacunarity);
noise.SetOctaves(Octaves);
noise.SetPeriodX(bitmap.Width);
noise.SetPeriodY(bitmap.Height);
var threshVal = 1 / (1 - Threshold);
var powFactor = 1 / Power;
for (var x = 0; x < bitmap.Width; x++)
{
for (var y = 0; y < bitmap.Height; y++)
{
// Do noise calculations.
var noiseVal = Math.Min(1, Math.Max(0, (noise.GetNoise(x, y) + 1) / 2));
// Threshold
noiseVal = Math.Max(0, noiseVal - Threshold);
noiseVal *= threshVal;
noiseVal = Math.Pow(noiseVal, powFactor);
// Get colors based on noise values.
var srcColor = Util.ColorMix(OuterColor, InnerColor, (float)noiseVal);
srcColor.A = (float)noiseVal;
// Apply blending factors & write back.
var dstColor = bitmap[x, y].Convert();
bitmap[x, y] = Util.Blend(dstColor, srcColor, DstFactor, SrcFactor).Convert();
}
}
}
