JSFiddle - React, Tailwind, and code Playground

by kirrrusha

HTML

<div class="main"></div>

JavaScript

const size = 600
const main = document.querySelector('.main')
const canvas = document.createElement('canvas')

canvas.height = size
canvas.width = size

main.appendChild(canvas)

class PerlinNoise {
  noise (x, y, z) {
    let p = new Array(512)
    let permutation = [
      151, 160, 137, 91, 90, 15, 131, 13, 201, 95, 96, 53, 194, 233, 7, 225, 140, 36, 103, 30, 69,
      142,8, 99, 37, 240, 21, 10, 23, 190, 6, 148, 247, 120, 234, 75, 0, 26, 197, 62, 94, 252, 219,
      203, 117, 35, 11, 32, 57, 177, 33, 88, 237, 149, 56, 87, 174, 20, 125, 136, 171, 168, 68, 175,
      74, 165, 71, 134, 139, 48, 27, 166, 77, 146, 158, 231, 83, 111, 229, 122, 60, 211, 133, 230,
      220, 105, 92, 41, 55, 46, 245, 40, 244, 102, 143, 54, 65, 25, 63, 161, 1, 216, 80, 73, 209, 76,
      132, 187, 208, 89, 18, 169, 200, 196, 135, 130, 116, 188, 159, 86, 164, 100, 109, 198, 173, 186,
      3, 64, 52, 217, 226, 250, 124, 123, 5, 202, 38, 147, 118, 126, 255, 82, 85, 212, 207, 206, 59,
      227, 47, 16, 58, 17, 182, 189, 28, 42, 223, 183, 170, 213, 119, 248, 152, 2, 44, 154, 163, 70,
      221, 153, 101, 155, 167, 43, 172, 9, 129, 22, 39, 253, 19, 98, 108, 110, 79, 113, 224, 232, 178,
      185, 112, 104, 218, 246, 97, 228, 251, 34, 242, 193, 238, 210, 144, 12, 191, 179, 162, 241, 81,
      51, 145, 235, 249, 14, 239, 107, 49, 192, 214, 31, 181, 199, 106, 157, 184, 84, 204, 176, 115,
      121, 50, 45, 127, 4, 150, 254, 138, 236, 205, 93, 222, 114, 67, 29, 24, 72, 243, 141, 128, 195,
      78, 66, 215, 61, 156, 180
    ]

    for (let i = 0; i < 256; i++) {
      p[256 + i] = p[i] = permutation[i]
    }

    let X  = Math.floor(x) & 255,
        Y  = Math.floor(y) & 255,
        Z  = Math.floor(z) & 255
        x -= Math.floor(x)
        y -= Math.floor(y)
        z -= Math.floor(z)
    let u  = this.fade(x),
        v  = this.fade(y),
        w  = this.fade(z)
    let A  = p[X] + Y,
        AA = p[A] + Z,
        AB = p[A + 1] + Z,
        B  = p[X + 1] + Y,
        BA = p[B] + Z,
     ...