public ILayerMasked Do(Vector2 size)
{
//int maxDim = (int)JryMath.Max(size.X, size.Y);
//CONSTANT - There is a problem with values that are not 2^n wher n is element of N
var maxDim = 256;
int gradSize = 8;
IInterpolation interpolation = new LinearClipped();
Layer2DObject map = new Layer2DObject(size);
int hgrid = (int)size.X;
int vgrid = (int)size.Y;
float gain = _noiseParameters.Amplitude;
float lacunarity = _noiseParameters.Lacunarity;
var gradients = setupGradient(gradSize);
//set up the random numbers table
int[] permutations = getPermutaions(maxDim);
int maxDimMinOne = maxDim - 1;
int gradSizeMinOne = gradSize - 1;
for (int i = 0; i < vgrid; i++)
{
for (int j = 0; j < hgrid; j++)
{
float pixel_value = 0.0f;
float amplitude = 1.0f;
float frequency = 1.0f / maxDim;
for (int k = _noiseParameters.FromDepth; k < _noiseParameters.ToDepth; k++)
{
int x = JryMath.Floor(j * frequency);
int y = JryMath.Floor(i * frequency);
float fracX = j * frequency - x;
float fracY = i * frequency - y;
// following two lines solved the bug.
x += k;
y += k;
IntVector4 v = getIndices(permutations, maxDimMinOne, gradSizeMinOne, x, y);
Vector2[] grads = getGrads(gradients, v);
float interpolatedxy = biInterpolate(interpolation, grads, fracX, fracY);
pixel_value += interpolatedxy * amplitude;
amplitude *= gain;
frequency *= lacunarity;
}
//put it in the map
map[j, i] = pixel_value;
}
}
return(map);
}
