| public Convolution ( double filter, double divisor, double offset, int X, int Z ) : void | ||
| filter | double | |
| divisor | double | |
| offset | double | |
| X | int | |
| Z | int | |
| return | void | |
/// <summary>
/// Smooths below-water surfaces and, optionally, adds beaches.
/// </summary>
/// <param name="waterlevel">
/// A <see cref="System.Single"/>
/// </param>
/// <param name="beaches">
/// A <see cref="System.Boolean"/>
/// </param>
/// <returns>
/// A <see cref="Channel"/>
/// </returns>
public void Silt(double waterlevel, bool beaches, int X, int Z)
{
// 1. Copy Image
// 2. Apply gauss blur to lower layer
// 3. Bring back unblurred terrain from above the water level.
int x_o = X * (int)ChunkScale.X;
int z_o = Z * (int)ChunkScale.Z;
double wl = (beaches) ? waterlevel + 6d : waterlevel;
wl = wl / 256f;
// Gaussian blur for silt and beaches.
double[][] gaussian_matrix = new double[3][] {
new double[3] {
1, 2, 1
},
new double[3] {
2, 4, 2
},
new double[3] {
1, 2, 1
}
};
IMapHandler Blurred = this;
Blurred.Convolution(gaussian_matrix, 32f, waterlevel / 2d, X, Z);
for (int x = 0; x < ChunkScale.X; x++)
{
for (int z = 0; z < ChunkScale.Z; z++)
{
// If > WL: use unblurred image.
// If <=WL: Use blurred image.
if (GetPrelimHeightAt(x + x_o, z + z_o) <= wl)
{
SetPrelimHeightAt(x + x_o, z + z_o, Blurred.GetPrelimHeightAt(x + x_o, z + z_o));
}
}
}
}