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const canvasSketch = require('canvas-sketch'); // not yet released tool | |
const Random = require('./util/random'); | |
const { lerp } = require('./util/math'); | |
// We can force a random seed or a specific string/number | |
Random.setSeed(Random.getRandomSeed()); | |
const settings = { | |
pixelsPerInch: 300, | |
// When exporting, use the seed as the suffix | |
// This way we can reproduce it more easily later | |
suffix: Random.getSeed(), | |
dimensions: [ 7, 11 ], | |
units: 'in' | |
}; | |
const sketch = ({ width, height }) => { | |
const margin = 0; | |
const sliceCount = 80000; | |
const slices = Array.from(new Array(sliceCount)).map((_, i, list) => { | |
const t = list.lenth <= 1 ? 0 : i / (list.length - 1); | |
const noiseAngle = t * Math.PI * 2; | |
const nx = Math.cos(noiseAngle); | |
const ny = Math.sin(noiseAngle); | |
const nf = 0.05 + Random.range(0, 0.5); | |
const amplitude = 2; | |
const noise = Random.noise2D(nx * nf, ny * nf); | |
const noise01 = noise * 0.5 + 0.5; | |
const tOffset = Random.gaussian() * 0.01; | |
const cx = width / 2; | |
const x = cx + noise * amplitude; | |
return { | |
alpha: Random.range(0.5, 1) * (1 - noise01), | |
color: 'white', | |
lineWidth: Random.range(0.005, 0.02) * 0.1, | |
length: Random.gaussian() * noise01 * 0.5, | |
angle: Random.range(-1, 1) * noise01 * 40 * Math.PI / 180, | |
x, | |
y: lerp(margin, height - margin, t + tOffset) | |
}; | |
}); | |
return ({ context }) => { | |
context.globalCompositeOperation = 'source-over'; | |
context.fillStyle = 'black'; | |
context.fillRect(0, 0, width, height); | |
context.globalCompositeOperation = 'lighter'; | |
slices.forEach(slice => { | |
context.save(); | |
context.beginPath(); | |
context.translate(slice.x, slice.y); | |
context.rotate(slice.angle); | |
context.lineTo(slice.length / 2, 0); | |
context.lineTo(-slice.length / 2, 0); | |
context.lineWidth = slice.lineWidth; | |
context.strokeStyle = slice.color; | |
context.globalAlpha = slice.alpha; | |
context.stroke(); | |
context.restore(); | |
}); | |
}; | |
}; | |
canvasSketch(sketch, settings); |
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