// TODO: change to be a "multiplier" for cave intensity
public NoiseSample3 Abyss(float3 pos)
{
var abyssX = new NoiseSample3 {
val = pos.x, gradient = float3(1, 0, 0)
};
var abyssZ = new NoiseSample3 {
val = pos.z, gradient = float3(0, 0, 1)
};
const float radius = 555;
var strength = fsnoise(pos.y + 999, radius * 6, 2);
var offsX = fsnoise(pos.y + 10000, radius * 2, 3) * radius * (0.6f + strength * 0.5f);
var offsZ = fsnoise(pos.y - 10000, radius * 2, 3) * radius * (0.6f + strength * 0.5f);
abyssX.val += offsX.val;
abyssX.gradient.y += offsX.gradient;
abyssZ.val += offsZ.val;
abyssZ.gradient.y += offsZ.gradient;
var radiusSample = new NoiseSample3 {
val = 555, gradient = 0
};
var radiusScale = 1f + fsnoise(pos.y + 20000, radius * 4, 3) * 0.7f;
radiusSample *= new NoiseSample3 {
val = radiusScale.val, gradient = float3(0, radiusScale.gradient, 0)
};
return((radiusSample - sqrt(abyssX * abyssX + abyssZ * abyssZ)) / radiusSample);
}
public static NoiseSample3 snoise(float3 pos, float3 invFreq, int seed = 0)
{
var sampl = new NoiseSample3();
sampl.val = noise.snoise(pos * invFreq + float3(_fixBugX, _fixBugY, _fixBugZ + (float)seed), out sampl.gradient);
sampl.gradient *= invFreq;
return(sampl);
}
public static NoiseSample3 max(NoiseSample3 l, NoiseSample3 r)
{
l.gradient = select(r.gradient, l.gradient, l.val >= r.val);
l.val = math.max(l.val, r.val);
return(l);
}
public static NoiseSample3 sqrt(NoiseSample3 x)
{
x.val = math.sqrt(x.val);
x.gradient = 0.5f / x.val * x.gradient;
return(x);
}
