private double Generate(double x)
{
int X = ((int)Math.Floor(x)) & 0xff;
x -= Math.Floor(x);
double u = PerlinUtil.Fade(x);
return(PerlinUtil.Lerp(u, PerlinUtil.Grad(perm[X], x), PerlinUtil.Grad(perm[X + 1], x - 1)) * 2.0d);
}
private double Generate(double x, double y)
{
int X = ((int)Math.Floor(x)) & 0xff;
int Y = ((int)Math.Floor(y)) & 0xff;
x -= Math.Floor(x);
y -= Math.Floor(y);
double u = PerlinUtil.Fade(x);
double v = PerlinUtil.Fade(y);
int A = (perm[X] + Y) & 0xff;
int B = (perm[X + 1] + Y) & 0xff;
return(PerlinUtil.Lerp(v,
PerlinUtil.Lerp(u, PerlinUtil.Grad(perm[A], x, y), PerlinUtil.Grad(perm[B], x - 1.0d, y)),
PerlinUtil.Lerp(u, PerlinUtil.Grad(perm[A + 1], x, y - 1.0d), PerlinUtil.Grad(perm[B + 1], x - 1.0d, y - 1.0d))
));
}
void Update()
{
if (Time.timeScale > 0f)
{
Vector3 position = zero;
if (kick != Vector2.zero)
{
position += (Vector3)(kick * kickScale);
kick = Vector2.MoveTowards(kick, Vector2.zero, kickFalloff * Time.deltaTime);
}
if (intensity != 0f)
{
t += Time.deltaTime * shakeSpeed;
position += (Vector3)(intensity * intensityScale * PerlinUtil.Variance2D(t));
intensity = Mathf.MoveTowards(intensity, 0f, intensityFalloff * Time.deltaTime);
}
transform.localPosition = position;
}
}
// constructor
public SimplexNoise(int seed = 0)
{
Interlocked.Exchange(ref this.seed, seed);
Interlocked.Exchange(ref perm, PerlinUtil.GetPerm(seed));
}
