/// <summary>
/// Generate a white noise <see cref="HeightMap"/>
/// </summary>
public override HeightMap Generate()
{
var maxLength = Math.Max(Dimensions.Height, Dimensions.Width);
var noise = new DiamondSquareNoise(Seed);
var result = noise.Generate(maxLength, RandomnessFactor);
var resizedResult = MathHelper.Copy(result, Dimensions.Height, Dimensions.Width);
var map = new HeightMap(resizedResult);
return(map);
}
public HeightMap(bool pPerlin, int pSize)
{
_size = pSize;
if (pPerlin)
{
var n = new PerlinNoise(pSize);
_map = n.Generate(4, .7f, .4f, .3f, .1f);
}
else
{
var n = new DiamondSquareNoise(pSize);
_map = n.Generate(0, 5, .5f);
float maxHeight = 0;
float maxDepth = 1;
for (int x = 0; x < pSize; x++)
{
for (int y = 0; y < pSize; y++)
{
if (_map[x, y] > maxHeight)
{
maxHeight = _map[x, y];
}
if (_map[x, y] < maxDepth)
{
maxDepth = _map[x, y];
}
}
}
//Scale all points so they are within max/min
maxDepth = Math.Abs(maxDepth);
for (int x = 0; x < pSize; x++)
{
for (int y = 0; y < pSize; y++)
{
if (_map[x, y] < 0)
{
_map[x, y] = _map[x, y] / maxDepth;
}
else if (_map[x, y] > 0)
{
_map[x, y] = _map[x, y] / maxHeight;
}
}
}
}
}
public DiamondSquare2D(int width, int height, float roughness = 1f, Func <double, double> decayFunction = null, System.Random random = null)
: base(width, height)
{
DiamondSquareNoise.DiamondSquareArguments args = new DiamondSquareNoise.DiamondSquareArguments();
args.width = width;
args.height = height;
args.roughness = roughness;
args.decayFunction = decayFunction;
args.random = random;
double[,] noise = DiamondSquareNoise.GenerateNoise(args);
float min = float.PositiveInfinity;
float max = float.NegativeInfinity;
for (int x = 0, y = 0; y < this.Height; y += ++x / this.Width, x %= this.Width)
{
this[y, x] = (float)noise[y, x];
min = Math.Min(min, this[y, x]);
max = Math.Max(max, this[y, x]);
}
}