static void FillFromNoiseMap(TerrainData terrainData, SharpNoise.NoiseMap noiseMap)
{
var max = noiseMap.Data.Max();
var min = noiseMap.Data.Min();
Parallel.For(0, noiseMap.Data.Length, i =>
{
var v = noiseMap.Data[i]; // [-1 .. 1]
v -= min;
v /= (max - min); // [0 .. 1]
v *= terrainData.Depth * 8 / 10;
v += terrainData.Depth * 2 / 10;
noiseMap.Data[i] = v;
});
Parallel.For(0, terrainData.Height, y =>
{
for (int x = 0; x < terrainData.Width; ++x)
{
var v = noiseMap[x, y];
int iv = (int)v;
for (int z = terrainData.Depth - 1; z >= 0; --z)
{
var p = new IntVector3(x, y, z);
/* above ground */
if (z > iv)
{
terrainData.SetTileDataNoHeight(p, TileData.EmptyTileData);
}
/* surface */
else if (z == iv)
{
terrainData.SetTileDataNoHeight(p, TileData.EmptyTileData);
}
/* underground */
else if (z < iv)
{
terrainData.SetTileDataNoHeight(p, TileData.GetNaturalWall(MaterialID.Granite));
}
else
{
throw new Exception();
}
}
}
});
}
/// <summary>
/// Create a new NoiseMap from the given source NoiseMap using bilinear filtering.
///
/// When the sample is outside the source BorderValue is used by default. If <see cref="clamp"/>/>
/// is set clamping is used instead.
/// </summary>
/// <param name="src">The source NoiseMap</param>
/// <param name="width">Width of the new NoiseMap</param>
/// <param name="height">Height of the new NoiseMap</param>
/// <param name="clamp">Use clamping when the sample is outside the source NoiseMap</param>
/// <returns>The new NoiseMap</returns>
public static NoiseMap BilinearFilter(NoiseMap src, int width, int height, bool clamp = false)
{
var dest = new NoiseMap(width, height);
var xratio = (float)src.Width / dest.Width;
var yratio = (float)src.Height / dest.Height;
Parallel.For(0, dest.Height, y =>
{
for (var x = 0; x < dest.Width; ++x)
{
var u = (x + 0.5f) * xratio - 0.5f;
var v = (y + 0.5f) * yratio - 0.5f;
var x0 = NoiseMath.FastFloor(u);
var y0 = NoiseMath.FastFloor(v);
var x1 = x0 + 1;
var y1 = y0 + 1;
var xf = u - x0;
var yf = v - y0;
if (clamp)
{
x0 = NoiseMath.Clamp(x0, 0, src.Width - 1);
x1 = NoiseMath.Clamp(x1, 0, src.Width - 1);
y0 = NoiseMath.Clamp(y0, 0, src.Height - 1);
y1 = NoiseMath.Clamp(y1, 0, src.Height - 1);
}
var c00 = src.GetValue(x0, y0);
var c01 = src.GetValue(x0, y1);
var c10 = src.GetValue(x1, y0);
var c11 = src.GetValue(x1, y1);
var val = NoiseMath.Bilinear(xf, yf, c00, c01, c10, c11);
dest.SetValue(x, y, val);
}
});
return(dest);
}
/// <summary>
/// Constructor.
/// </summary>
public NoiseMap(NoiseMap other)
: base(other)
{
}
/// <summary>
/// Constructor.
/// </summary>
public NoiseSphere(NoiseMap other)
: base(other)
{
}