public IList <LineSegment> Subdivide(Vector2 x, Vector2 y)
{
float per = 1;
var points = new List <Vector2> {
x, y
};
var oc = getOctaveAccordingToLength(x, y);
for (int o = 0; o < oc; o++)
{
var newPts = new List <Vector2>();
for (int i = 0; i < points.Count - 1; i++)
{
var cur = points[i];
var next = points[i + 1];
var dif = next - cur;
var perp = Vector2.Normalize(new Vector2(dif.Y, -dif.X));
// TODO deterministicaly sort point
var a = cur.X < next.X ? cur :next;
var b = cur.X >= next.X ? cur : next;
var curSeed = _random.NextD((int)a.X, (int)a.Y) * 1000;
var nextSeed = _random.NextD((int)b.X, (int)b.Y) * 1000;
float moverRand = (_random.NextD((int)curSeed, (int)nextSeed) - .5f * _amplitude * per * 2);
Vector2 mover = perp * moverRand;
var newPoint = cur + dif * .5f + mover;
newPts.Add(cur);
newPts.Add(newPoint);
}
newPts.Add(points[points.Count - 1]);
points = newPts;
per *= _persistance;
}
var lines = new List <LineSegment>();
for (int i = 0; i < points.Count - 1; i++)
{
var cur = points[i];
var next = points[i + 1];
lines.Add(new LineSegment(cur, next));
}
return(lines);
}
public ILayerMasked Do(INoiseParameters param, Vector2 size)
{
var dt = DateTime.Now.Millisecond;
System.Diagnostics.Debug.Print(dt + "Rand" + _rand.NextD(1, 2));
var pow = (int)JryMath.Max(JryMath.Ceil(JryMath.Log(size.X, 2)), JryMath.Ceil(JryMath.Log(size.Y, 2)));
int sizePow2 = (int)JryMath.Pow(2, pow) + 1;
Layer2DObject layer = new Layer2DObject(sizePow2, sizePow2);
setupBaseDS(sizePow2, layer, _rand);
var par = param.BaseAmplitude * param.Amplitude;
ds(layer, sizePow2, par, param, _rand);
var croped = new Layer2DObject(size);
for (int y = 0; y < size.Y; y++)
{
for (int x = 0; x < size.X; x++)
{
croped[x, y] = layer[x, y];
}
}
return(croped);
}
private static float rnd(IRandom2 r, int x, int y)
{
var rr = r.NextD(x, y);
return(rr - .5f);
}
