export declare const ink = "\n  \n  \n  float aastep(float threshold, float value) {\n    float afwidth = length(vec2(dFdx(value), dFdy(value))) * 0.70710678118654757;\n    return smoothstep(threshold - afwidth, threshold + afwidth, value);\n  }\n\n  \n  vec3 mod289(vec3 x) {\n    return x - floor(x * (1.0 / 289.0)) * 289.0;\n  }\n  \n  vec2 mod289(vec2 x) {\n    return x - floor(x * (1.0 / 289.0)) * 289.0;\n  }\n  \n  vec3 permute(vec3 x) {\n    return mod289(((x*34.0)+1.0)*x);\n  }\n  \n  float snoise(vec2 v)\n    {\n    const vec4 C = vec4(0.211324865405187,  // (3.0-sqrt(3.0))/6.0\n                        0.366025403784439,  // 0.5*(sqrt(3.0)-1.0)\n                       -0.577350269189626,  // -1.0 + 2.0 * C.x\n                        0.024390243902439); // 1.0 / 41.0\n  // First corner\n    vec2 i  = floor(v + dot(v, C.yy) );\n    vec2 x0 = v -   i + dot(i, C.xx);\n  \n  // Other corners\n    vec2 i1;\n    //i1.x = step( x0.y, x0.x ); // x0.x > x0.y ? 1.0 : 0.0\n    //i1.y = 1.0 - i1.x;\n    i1 = (x0.x > x0.y) ? vec2(1.0, 0.0) : vec2(0.0, 1.0);\n    // x0 = x0 - 0.0 + 0.0 * C.xx ;\n    // x1 = x0 - i1 + 1.0 * C.xx ;\n    // x2 = x0 - 1.0 + 2.0 * C.xx ;\n    vec4 x12 = x0.xyxy + C.xxzz;\n    x12.xy -= i1;\n  \n  // Permutations\n    i = mod289(i); // Avoid truncation effects in permutation\n    vec3 p = permute( permute( i.y + vec3(0.0, i1.y, 1.0 ))\n      + i.x + vec3(0.0, i1.x, 1.0 ));\n  \n    vec3 m = max(0.5 - vec3(dot(x0,x0), dot(x12.xy,x12.xy), dot(x12.zw,x12.zw)), 0.0);\n    m = m*m ;\n    m = m*m ;\n  \n  // Gradients: 41 points uniformly over a line, mapped onto a diamond.\n  // The ring size 17*17 = 289 is close to a multiple of 41 (41*7 = 287)\n  \n    vec3 x = 2.0 * fract(p * C.www) - 1.0;\n    vec3 h = abs(x) - 0.5;\n    vec3 ox = floor(x + 0.5);\n    vec3 a0 = x - ox;\n  \n  // Normalise gradients implicitly by scaling m\n  // Approximation of: m *= inversesqrt( a0*a0 + h*h );\n    m *= 1.79284291400159 - 0.85373472095314 * ( a0*a0 + h*h );\n  \n  // Compute final noise value at P\n    vec3 g;\n    g.x  = a0.x  * x0.x  + h.x  * x0.y;\n    g.yz = a0.yz * x12.xz + h.yz * x12.yw;\n    return 130.0 * dot(m, g);\n  }\n  float absorb(float sdf, vec2 uv, float scale, float falloff) {\n    float distort = sdf + snoise(uv * scale) * falloff;\n    return aastep(0.5, distort);\n  }\n\n\n  // float ink(float sdf, vec2 uv) {\n  //   float alpha = 0.0;\n  //   alpha += absorb(sdf, uv, 1000.0, 0.1) * 0.3;\n  //   alpha += absorb(sdf, uv, 50.0, 0.2) * 0.3;\n  //   alpha += absorb(sdf, uv, 500.0, 0.2) * 0.3;\n  //   return alpha;\n  // }\n\n  // float ink(float sdf, vec2 uv) {\n  //   float alpha = 0.0;\n  //   alpha += absorb(sdf, uv, 80.0, 0.02) * 0.1;\n  //   alpha += absorb(sdf, uv, 50.0, 0.02) * 0.1;\n  //   alpha += absorb(sdf, uv, 500.0, 0.05) * 0.2;\n  //   alpha += absorb(sdf, uv, 1000.0, 0.05) * 0.2;\n  //   alpha += absorb(sdf, uv, 3000.0, 0.1) * 0.2;\n  //   alpha += absorb(sdf, uv, 1000.0, 0.3) * 0.15;\n  //   return alpha;\n  // }\n  \n  float ink(float sdf, vec2 uv) {\n    float alpha = 0.0;\n    alpha += absorb(sdf, uv, 600.0, 0.1) * 0.2;\n    alpha += absorb(sdf, uv, 300.0, 0.1) * 0.2;\n    alpha += absorb(sdf, uv, 20.0, 0.05) * 0.2;\n    alpha += absorb(sdf, uv, 400.0, 0.05) * 0.2;\n    alpha += absorb(sdf, uv, 100.0, 0.2) * 0.2;\n    return alpha;\n  }\n";