void ILandMapEffector.Effect(LandMap landMap)
{
if (level <= 1)
{
return;
}
for (var y = 0; y < LandMap.Size; y++)
{
for (var x = 0; x < LandMap.Size; x++)
{
var nextValue = landMap.GetHeight(x, y);
var nextValueCount = 0;
for (var xRange = Math.Max(x - level, 0); xRange < Math.Min(x + level, LandMap.Size); xRange++)
{
for (var yRange = Math.Max(y - level, 0); yRange < Math.Min(y + level, LandMap.Size); yRange++, nextValueCount++)
{
var subX = x - xRange;
var subY = y - yRange;
if (!(Math.Sqrt(subX * subX + subY * subY) <= level))
{
continue;
}
nextValue += landMap.GetHeight(xRange, yRange);
}
}
var finalValue = nextValue / nextValueCount;
landMap.SetHeight(x, y, finalValue);
}
}
}
void ILandMapEffector.Effect(LandMap landMap)
{
for (var y = 0; y < LandMap.Size; y++)
{
for (var x = 0; x < LandMap.Size; x++)
{
var fbm = fBM(x, y, octaves, lacunarity, gain);
var value = landMap.GetHeight(x, y);
landMap.SetHeight(x, y, fbm + value);
}
}
}
void ILandMapEffector.Effect(LandMap landMap)
{
for (var y = 0; y < LandMap.Size; y++)
{
for (var x = 0; x < LandMap.Size; x++)
{
var voronoi = Voronoi(x, y, u, v);
var value = landMap.GetHeight(x, y);
landMap.SetHeight(x, y, voronoi + value);
}
}
}
void ILandMapEffector.Effect(LandMap landMap)
{
var random = Random.Range(-1000f, 1000f);
for (var y = 0; y < LandMap.Size; y++)
{
for (var x = 0; x < LandMap.Size; x++)
{
var xSample = random + (float)x / LandMap.Size * noiseScale;
var ySample = random + (float)y / LandMap.Size * noiseScale;
var noiseValue = OctavePerlin(xSample, ySample);
var value = landMap.GetHeight(x, y);
landMap.SetHeight(x, y, noiseValue + value);
}
}
}
void ILandMapEffector.Effect(LandMap landMap)
{
var random = Random.Range(-1000f, 1000f);
for (var y = 0; y < LandMap.Size; y++)
{
for (var x = 0; x < LandMap.Size; x++)
{
var xSample = random + (float)x / LandMap.Size * noiseScale;
var ySample = random + (float)y / LandMap.Size * noiseScale;
var noise = Mathf.PerlinNoise(xSample, ySample);
if (noise <= rounding)
{
noise = 0;
}
var value = landMap.GetHeight(x, y);
landMap.SetHeight(x, y, noise + value);
}
}
}
private void Deposit(LandMap landMap, int x, int y)
{
var c = 0f;
var v = 1.05f;
const float minSlope = 1.15f;
const float maxVelocity = 10f;
for (var iteration = 0; iteration < iterations; iteration++)
{
v = Mathf.Min(v, maxVelocity);
var value = landMap.GetHeight(x, y);
float[] nv =
{
landMap.GetHeight(x, y - 1),
landMap.GetHeight(x, y + 1),
landMap.GetHeight(x + 1, y),
landMap.GetHeight(x - 1, y)
};
var minIndex = IndexOfMinimum(nv);
if (!(nv[minIndex] < value))
{
continue;
}
var slope = Mathf.Min(minSlope, value - nv[minIndex]);
var vtc = depositionSpeed * v * slope;
if (c > carryingCapacity)
{
c -= vtc;
landMap.SetHeight(x, y, landMap.GetHeight(x, y) + vtc);
}
else
{
if (c + vtc > carryingCapacity)
{
var delta = c + vtc - carryingCapacity;
c += delta;
landMap.SetHeight(x, y, landMap.GetHeight(x, y) + delta);
}
else
{
c += vtc;
landMap.SetHeight(x, y, landMap.GetHeight(x, y) - vtc);
}
}
switch (minIndex)
{
case 0: y -= 1; break;
case 1: y += 1; break;
case 2: x += 1; break;
case 3: x -= 1; break;
}
if (x > LandMap.MaxSize)
{
x = LandMap.Size;
}
if (x < 0)
{
x = 0;
}
if (y > LandMap.MaxSize)
{
y = LandMap.Size;
}
if (y < 0)
{
y = 0;
}
}
int IndexOfMinimum(IReadOnlyList <float> array)
{
var index = 0;
var minValue = array[0];
for (var i = 0; i < 3; i++)
{
if (!(array[i] < minValue))
{
continue;
}
minValue = array[i];
index = i;
}
return(index);
}
}