31:[] 2f:{"title":"Simple sin waves with perlin noise permutation","cells":[{"id":0,"value":"md`# Simple sin waves with perlin noise permutation`","pinned":false,"hidden":false,"mode":"ojs"},{"id":10,"value":"chart = chartOf(paths, {watermark: true})","pinned":false,"hidden":false,"mode":"ojs"},{"id":52,"value":"viewof seed = html``","pinned":false,"hidden":false,"mode":"ojs"},{"id":18,"value":"viewof a = html``","pinned":false,"hidden":false,"mode":"ojs"},{"id":24,"value":"viewof b = html``","pinned":false,"hidden":false,"mode":"ojs"},{"id":77,"value":"viewof am = html``","pinned":false,"hidden":false,"mode":"ojs"},{"id":79,"value":"viewof bm = html``","pinned":false,"hidden":false,"mode":"ojs"},{"id":28,"value":"viewof num = html``","pinned":false,"hidden":false,"mode":"ojs"},{"id":42,"value":"viewof step = html``","pinned":false,"hidden":false,"mode":"ojs"},{"id":55,"value":"viewof period = html``","pinned":false,"hidden":false,"mode":"ojs"},{"id":101,"value":"viewof period2 = html``","pinned":false,"hidden":false,"mode":"ojs"},{"id":60,"value":"viewof mag = html``","pinned":false,"hidden":false,"mode":"ojs"},{"id":4,"value":"paths = {\n noise.seed(seed)\n const paths = []\n\n const p = ([x, y]) => ([\n x + mag * noise.simplex2(x / period, y / period),\n y + mag * noise.simplex2(x / period + 123, y / period)\n ])\n const p2 = ([x, y], i) => ([\n x + mag * noise.simplex3(x / period, y / period, i/period2),\n y + mag * noise.simplex3(x / period + 123, y / period, i/period2)\n ])\n for (let i = -num; i < num; i+=step) {\n const left = [Math.sin(i/am) * 500, Math.sin(i/(am * a) + 10) * 300]\n const right = [Math.cos(i/bm) * 500, Math.sin(i/(bm * b) + 20) * 300]\n\n paths.push(split(left, right, 400))\n }\n\n return mapPoints(paths, p2)\n}","pinned":true,"hidden":false,"mode":"ojs"},{"id":7,"value":"import {chartOf, split, mapPoints} from '@josephg/plotter-sketchpad'","pinned":false,"hidden":false,"mode":"ojs"},{"id":50,"value":"noise = require('https://bundle.run/simplenoise@1.0.1')","pinned":false,"hidden":false,"mode":"ojs"}],"files":"$W31","stdlib":"1","titling":"auto"}