Operator % has changed, probably current code need a fix
fn rand(n: f32) -> f32 { return fract(sin(n) * 43758.5453123); }
fn noise(p: f32) -> f32 {
let fl = floor(p);
let fc = fract(p);
return mix(rand(fl), rand(fl + 1.), fc);
}
fn rand2(n: vec2<f32>) -> f32 {
return fract(sin(dot(n, vec2<f32>(12.9898, 4.1414))) * 43758.5453);
}
fn noise2(n: vec2<f32>) -> f32 {
let d = vec2<f32>(0., 1.);
let b = floor(n);
let f = smoothStep(vec2<f32>(0.), vec2<f32>(1.), fract(n));
return mix(mix(rand2(b), rand2(b + d.yx), f.x), mix(rand2(b + d.xy), rand2(b + d.yy), f.x), f.y);
}
fn mod289(x: vec4<f32>) -> vec4<f32> { return x - floor(x * (1. / 289.)) * 289.; }
fn perm4(x: vec4<f32>) -> vec4<f32> { return mod289(((x * 34.) + 1.) * x); }
fn noise3(p: vec3<f32>) -> f32 {
let a = floor(p);
var d: vec3<f32> = p - a;
d = d * d * (3. - 2. * d);
let b = a.xxyy + vec4<f32>(0., 1., 0., 1.);
let k1 = perm4(b.xyxy);
let k2 = perm4(k1.xyxy + b.zzww);
let c = k2 + a.zzzz;
let k3 = perm4(c);
let k4 = perm4(c + 1.);
let o1 = fract(k3 * (1. / 41.));
let o2 = fract(k4 * (1. / 41.));
let o3 = o2 * d.z + o1 * (1. - d.z);
let o4 = o3.yw * d.x + o3.xz * (1. - d.x);
return o4.y * d.y + o4.x * (1. - d.y);
}
// MIT License. © Stefan Gustavson, Munrocket
//
fn permute4(x: vec4<f32>) -> vec4<f32> { return ((x * 34. + 1.) * x) % vec4<f32>(289.); }
fn fade2(t: vec2<f32>) -> vec2<f32> { return t * t * t * (t * (t * 6. - 15.) + 10.); }
fn perlinNoise2(P: vec2<f32>) -> f32 {
var Pi: vec4<f32> = floor(P.xyxy) + vec4<f32>(0., 0., 1., 1.);
let Pf = fract(P.xyxy) - vec4<f32>(0., 0., 1., 1.);
Pi = Pi % vec4<f32>(289.); // To avoid truncation effects in permutation
let ix = Pi.xzxz;
let iy = Pi.yyww;
let fx = Pf.xzxz;
let fy = Pf.yyww;
let i = permute4(permute4(ix) + iy);
var gx: vec4<f32> = 2. * fract(i * 0.0243902439) - 1.; // 1/41 = 0.024...
let gy = abs(gx) - 0.5;
let tx = floor(gx + 0.5);
gx = gx - tx;
var g00: vec2<f32> = vec2<f32>(gx.x, gy.x);
var g10: vec2<f32> = vec2<f32>(gx.y, gy.y);
var g01: vec2<f32> = vec2<f32>(gx.z, gy.z);
var g11: vec2<f32> = vec2<f32>(gx.w, gy.w);
let norm = 1.79284291400159 - 0.85373472095314 *
vec4<f32>(dot(g00, g00), dot(g01, g01), dot(g10, g10), dot(g11, g11));
g00 = g00 * norm.x;
g01 = g01 * norm.y;
g10 = g10 * norm.z;
g11 = g11 * norm.w;
let n00 = dot(g00, vec2<f32>(fx.x, fy.x));
let n10 = dot(g10, vec2<f32>(fx.y, fy.y));
let n01 = dot(g01, vec2<f32>(fx.z, fy.z));
let n11 = dot(g11, vec2<f32>(fx.w, fy.w));
let fade_xy = fade2(Pf.xy);
let n_x = mix(vec2<f32>(n00, n01), vec2<f32>(n10, n11), vec2<f32>(fade_xy.x));
let n_xy = mix(n_x.x, n_x.y, fade_xy.y);
return 2.3 * n_xy;
}
// MIT License. © Stefan Gustavson, Munrocket
//
fn permute4(x: vec4<f32>) -> vec4<f32> { return ((x * 34. + 1.) * x) % vec4<f32>(289.); }
fn taylorInvSqrt4(r: vec4<f32>) -> vec4<f32> { return 1.79284291400159 - 0.85373472095314 * r; }
fn fade3(t: vec3<f32>) -> vec3<f32> { return t * t * t * (t * (t * 6. - 15.) + 10.); }
fn perlinNoise3(P: vec3<f32>) -> f32 {
var Pi0 : vec3<f32> = floor(P); // Integer part for indexing
var Pi1 : vec3<f32> = Pi0 + vec3<f32>(1.); // Integer part + 1
Pi0 = Pi0 % vec3<f32>(289.);
Pi1 = Pi1 % vec3<f32>(289.);
let Pf0 = fract(P); // Fractional part for interpolation
let Pf1 = Pf0 - vec3<f32>(1.); // Fractional part - 1.
let ix = vec4<f32>(Pi0.x, Pi1.x, Pi0.x, Pi1.x);
let iy = vec4<f32>(Pi0.yy, Pi1.yy);
let iz0 = Pi0.zzzz;
let iz1 = Pi1.zzzz;
let ixy = permute4(permute4(ix) + iy);
let ixy0 = permute4(ixy + iz0);
let ixy1 = permute4(ixy + iz1);
var gx0: vec4<f32> = ixy0 / 7.;
var gy0: vec4<f32> = fract(floor(gx0) / 7.) - 0.5;
gx0 = fract(gx0);
var gz0: vec4<f32> = vec4<f32>(0.5) - abs(gx0) - abs(gy0);
var sz0: vec4<f32> = step(gz0, vec4<f32>(0.));
gx0 = gx0 + sz0 * (step(vec4<f32>(0.), gx0) - 0.5);
gy0 = gy0 + sz0 * (step(vec4<f32>(0.), gy0) - 0.5);
var gx1: vec4<f32> = ixy1 / 7.;
var gy1: vec4<f32> = fract(floor(gx1) / 7.) - 0.5;
gx1 = fract(gx1);
var gz1: vec4<f32> = vec4<f32>(0.5) - abs(gx1) - abs(gy1);
var sz1: vec4<f32> = step(gz1, vec4<f32>(0.));
gx1 = gx1 - sz1 * (step(vec4<f32>(0.), gx1) - 0.5);
gy1 = gy1 - sz1 * (step(vec4<f32>(0.), gy1) - 0.5);
var g000: vec3<f32> = vec3<f32>(gx0.x, gy0.x, gz0.x);
var g100: vec3<f32> = vec3<f32>(gx0.y, gy0.y, gz0.y);
var g010: vec3<f32> = vec3<f32>(gx0.z, gy0.z, gz0.z);
var g110: vec3<f32> = vec3<f32>(gx0.w, gy0.w, gz0.w);
var g001: vec3<f32> = vec3<f32>(gx1.x, gy1.x, gz1.x);
var g101: vec3<f32> = vec3<f32>(gx1.y, gy1.y, gz1.y);
var g011: vec3<f32> = vec3<f32>(gx1.z, gy1.z, gz1.z);
var g111: vec3<f32> = vec3<f32>(gx1.w, gy1.w, gz1.w);
let norm0 = taylorInvSqrt4(
vec4<f32>(dot(g000, g000), dot(g010, g010), dot(g100, g100), dot(g110, g110)));
g000 = g000 * norm0.x;
g010 = g010 * norm0.y;
g100 = g100 * norm0.z;
g110 = g110 * norm0.w;
let norm1 = taylorInvSqrt4(
vec4<f32>(dot(g001, g001), dot(g011, g011), dot(g101, g101), dot(g111, g111)));
g001 = g001 * norm1.x;
g011 = g011 * norm1.y;
g101 = g101 * norm1.z;
g111 = g111 * norm1.w;
let n000 = dot(g000, Pf0);
let n100 = dot(g100, vec3<f32>(Pf1.x, Pf0.yz));
let n010 = dot(g010, vec3<f32>(Pf0.x, Pf1.y, Pf0.z));
let n110 = dot(g110, vec3<f32>(Pf1.xy, Pf0.z));
let n001 = dot(g001, vec3<f32>(Pf0.xy, Pf1.z));
let n101 = dot(g101, vec3<f32>(Pf1.x, Pf0.y, Pf1.z));
let n011 = dot(g011, vec3<f32>(Pf0.x, Pf1.yz));
let n111 = dot(g111, Pf1);
var fade_xyz: vec3<f32> = fade3(Pf0);
let temp = vec4<f32>(f32(fade_xyz.z)); // simplify after chrome bug fix
let n_z = mix(vec4<f32>(n000, n100, n010, n110), vec4<f32>(n001, n101, n011, n111), temp);
let n_yz = mix(n_z.xy, n_z.zw, vec2<f32>(f32(fade_xyz.y))); // simplify after chrome bug fix
let n_xyz = mix(n_yz.x, n_yz.y, fade_xyz.x);
return 2.2 * n_xyz;
}
// MIT License. © Ian McEwan, Stefan Gustavson, Munrocket
//
fn permute3(x: vec3<f32>) -> vec3<f32> { return (((x * 34.) + 1.) * x) % vec3<f32>(289.); }
fn simplexNoise2(v: vec2<f32>) -> f32 {
let C = vec4<f32>(0.211324865405187, 0.366025403784439, -0.577350269189626, 0.024390243902439);
var i: vec2<f32> = floor(v + dot(v, C.yy));
let x0 = v - i + dot(i, C.xx);
var i1: vec2<f32> = select(vec2<f32>(1., 0.), vec2<f32>(0., 1.), (x0.x > x0.y));
var x12: vec4<f32> = x0.xyxy + C.xxzz - vec4<f32>(i1, 0., 0.);
i = i % vec2<f32>(289.);
let p = permute3(permute3(i.y + vec3<f32>(0., i1.y, 1.)) + i.x + vec3<f32>(0., i1.x, 1.));
var m: vec3<f32> = max(0.5 -
vec3<f32>(dot(x0, x0), dot(x12.xy, x12.xy), dot(x12.zw, x12.zw)), vec3<f32>(0.));
m = m * m;
m = m * m;
let x = 2. * fract(p * C.www) - 1.;
let h = abs(x) - 0.5;
let ox = floor(x + 0.5);
let a0 = x - ox;
m = m * (1.79284291400159 - 0.85373472095314 * (a0 * a0 + h * h));
let g = vec3<f32>(a0.x * x0.x + h.x * x0.y, a0.yz * x12.xz + h.yz * x12.yw);
return 130. * dot(m, g);
}
// MIT License. © Ian McEwan, Stefan Gustavson, Munrocket
//
fn permute4(x: vec4<f32>) -> vec4<f32> { return ((x * 34. + 1.) * x) % vec4<f32>(289.); }
fn taylorInvSqrt4(r: vec4<f32>) -> vec4<f32> { return 1.79284291400159 - 0.85373472095314 * r; }
fn simplexNoise3(v: vec3<f32>) -> f32 {
let C = vec2<f32>(1. / 6., 1. / 3.);
let D = vec4<f32>(0., 0.5, 1., 2.);
// First corner
var i: vec3<f32> = floor(v + dot(v, C.yyy));
let x0 = v - i + dot(i, C.xxx);
// Other corners
let g = step(x0.yzx, x0.xyz);
let l = 1.0 - g;
let i1 = min(g.xyz, l.zxy);
let i2 = max(g.xyz, l.zxy);
// x0 = x0 - 0. + 0. * C
let x1 = x0 - i1 + 1. * C.xxx;
let x2 = x0 - i2 + 2. * C.xxx;
let x3 = x0 - 1. + 3. * C.xxx;
// Permutations
i = i % vec3<f32>(289.);
let p = permute4(permute4(permute4(
i.z + vec4<f32>(0., i1.z, i2.z, 1. )) +
i.y + vec4<f32>(0., i1.y, i2.y, 1. )) +
i.x + vec4<f32>(0., i1.x, i2.x, 1. ));
// Gradients (NxN points uniformly over a square, mapped onto an octahedron.)
var n_: f32 = 1. / 7.; // N=7
let ns = n_ * D.wyz - D.xzx;
let j = p - 49. * floor(p * ns.z * ns.z); // mod(p, N*N)
let x_ = floor(j * ns.z);
let y_ = floor(j - 7.0 * x_); // mod(j, N)
let x = x_ *ns.x + ns.yyyy;
let y = y_ *ns.x + ns.yyyy;
let h = 1.0 - abs(x) - abs(y);
let b0 = vec4<f32>( x.xy, y.xy );
let b1 = vec4<f32>( x.zw, y.zw );
let s0 = floor(b0)*2.0 + 1.0;
let s1 = floor(b1)*2.0 + 1.0;
let sh = -step(h, vec4<f32>(0.));
let a0 = b0.xzyw + s0.xzyw*sh.xxyy ;
let a1 = b1.xzyw + s1.xzyw*sh.zzww ;
var p0: vec3<f32> = vec3<f32>(a0.xy, h.x);
var p1: vec3<f32> = vec3<f32>(a0.zw, h.y);
var p2: vec3<f32> = vec3<f32>(a1.xy, h.z);
var p3: vec3<f32> = vec3<f32>(a1.zw, h.w);
// Normalise gradients
let norm = taylorInvSqrt4(vec4<f32>(dot(p0,p0), dot(p1,p1), dot(p2,p2), dot(p3,p3)));
p0 = p0 * norm.x;
p1 = p1 * norm.y;
p2 = p2 * norm.z;
p3 = p3 * norm.w;
// Mix final noise value
var m: vec4<f32> = 0.6 - vec4<f32>(dot(x0,x0), dot(x1,x1), dot(x2,x2), dot(x3,x3));
m = max(m, vec4<f32>(0.));
m = m * m;
return 42. * dot(m * m, vec4<f32>(dot(p0,x0), dot(p1,x1), dot(p2,x2), dot(p3,x3)));
}// MIT License. © Inigo Quilez, Munrocket
// noise2() is any noise here: Value, Perlin, Simplex, Worley
//
var m2: mat2x2<f32> = mat2x2<f32>(vec2<f32>(0.8, 0.6), vec2<f32>(-0.6, 0.8));
fn fbm(p: vec2<f32>) -> f32 {
var f: f32 = 0.;
f = f + 0.5000 * noise2(p); p = m2 * p * 2.02;
f = f + 0.2500 * noise2(p); p = m2 * p * 2.03;
f = f + 0.1250 * noise2(p); p = m2 * p * 2.01;
f = f + 0.0625 * noise2(p);
return f / 0.9375;
}// <https://www.shadertoy.com/view/Xd23Dh>
// by Inigo Quilez
//
fn hash23(p: vec2<f32>) -> vec3<f32> {
let q = vec3<f32>(dot(p, vec2<f32>(127.1, 311.7)),
dot(p, vec2<f32>(269.5, 183.3)),
dot(p, vec2<f32>(419.2, 371.9)));
return fract(sin(q) * 43758.5453);
}
fn voroNoise2(x: vec2<f32>, u: f32, v: f32) -> f32 {
let p = floor(x);
let f = fract(x);
let k = 1. + 63. * pow(1. - v, 4.);
var va: f32 = 0.;
var wt: f32 = 0.;
for(var j: i32 = -2; j <= 2; j = j + 1) {
for(var i: i32 = -2; i <= 2; i = i + 1) {
let g = vec2<f32>(f32(i), f32(j));
let o = hash23(p + g) * vec3<f32>(u, u, 1.);
let r = g - f + o.xy;
let d = dot(r, r);
let ww = pow(1. - smoothStep(0., 1.414, sqrt(d)), k);
va = va + o.z * ww;
wt = wt + ww;
}
}
return va / wt;
}- Stefan Gustavson (http://github.com/ashima/webgl-noise)
- Inigo Quilez (https://iquilezles.org/www/index.htm)
- Patricio Gonzalez Vivo (https://gist.github.com/patriciogonzalezvivo/670c22f3966e662d2f83)
- translate main noises
- add images if possible
- revisit, becasue % operator has changed
- Worley noise, integer based value noise