private void square(Layer2DObject layer, int size, float ap, int depth, IRandom2 rand)
{
int squareSize = (int)(size * JryMath.Pow(.5f, depth));
int squareHalfSize = (int)(squareSize / 2);
for (int iy = 0; iy < JryMath.Pow(2, depth); iy++)
{
for (int ix = 0; ix < JryMath.Pow(2, depth); ix++)
{
var xCorL = ix * squareSize;
var xCorR = (ix + 1) * squareSize;
var yCorT = iy * squareSize;
var yCorB = (iy + 1) * squareSize;
var tl = layer[xCorL, yCorT].Value;
var bl = layer[xCorL, yCorB].Value;
var tr = layer[xCorR, yCorT].Value;
var br = layer[xCorR, yCorB].Value;
int xph = xCorL + squareHalfSize;
int yph = yCorT + squareHalfSize;
var c = (tl + tr + br + bl) / 4 + rnd(rand, xph, yph) * ap;
var b = (br + bl + c + getClipped(layer, xph, yph + squareSize)) / 4 + rnd(rand, xph, yph + squareSize) * ap;
var t = (tr + tl + c + getClipped(layer, xph, yph - squareSize)) / 4 + rnd(rand, xph, yph - squareSize) * ap;
var r = (tr + br + c + getClipped(layer, xph + squareSize, yph)) / 4 + rnd(rand, xph + squareSize, yph) * ap;
var l = (tl + bl + c + getClipped(layer, xph - squareSize, yph)) / 4 + rnd(rand, xph - squareSize, yph) * ap;
layer[xph, yCorT] = t;
layer[xph, yCorB] = b;
layer[xCorL, yph] = l;
layer[xCorR, yph] = r;
}
}
}
public SegmentDivider(IRandom2 random, int amplitude, float persistance)
{
_random = random;
_amplitude = amplitude;
_persistance = persistance;
}
private void diamond(ILayer layer, int size, float ap, int l, IRandom2 rand)
{
int squareSize = (int)(size * JryMath.Pow(.5f, l));
int squareHalfSize = (int)(squareSize / 2);
for (int iy = 0; iy < JryMath.Pow(2, l); iy++)
{
for (int ix = 0; ix < JryMath.Pow(2, l); ix++)
{
var xCorL = ix * squareSize;
var xCorR = (ix + 1) * squareSize;
var yCorT = iy * squareSize;
var yCorB = (iy + 1) * squareSize;
var tl = layer[xCorL, yCorT].Value;
var bl = layer[xCorL, yCorB].Value;
var tr = layer[xCorR, yCorT].Value;
var br = layer[xCorR, yCorB].Value;
int xph = xCorL + squareHalfSize;
int yph = yCorT + squareHalfSize;
var c = (tl + tr + br + bl) / 4 + rnd(rand, xph, yph) * ap;
layer[xph, yph] = c;
}
}
}
private void setupBaseDS(int sizePow2, Layer2DObject layer, IRandom2 rand)
{
int blockSize = sizePow2;
int xstart = 0;
int ystart = 0;
int xend = xstart + blockSize - 1;
int yend = ystart + blockSize - 1;
var tl = rnd(rand, xstart, ystart);
var tr = rnd(rand, xend, ystart);
var bl = rnd(rand, xstart, yend);
var br = rnd(rand, xend, yend);
layer[xend, ystart] = tr;
layer[xstart, yend] = bl;
layer[xstart, ystart] = tl;
layer[xend, yend] = br;
}
private void ds(Layer2DObject layer, int sizePow2, float ba, INoiseParameters np, IRandom2 rand)
{
int size = sizePow2 - 1;
int log = (int)JryMath.Log(size, 2);
// HACK
var x = np as DsNoiseParameters;
for (int l = 0; l < log; l++)
{
if (l == 0 && x != null)
{
hackeddiamond(layer, ba, x.HillProbability);
}
else
{
diamond(layer, size, ba, l, rand);
}
square(layer, size, ba, l, rand);
ba *= np.Amplitude;
if (l >= np.ToDepth)
{
ba *= np.Amplitude;
}
}
}
private static float rnd(IRandom2 r, int x, int y)
{
var rr = r.NextD(x, y);
return(rr - .5f);
}
public DiamondSquare(IRandom2 rand)
{
_rand = rand;
}
