Web developer and autodidact with an interest in creative coding.
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Contractions 2
canvas = {
const {
size: s = 600,
steps = 500,
lines = 30,
duration = 6000,
lineWidth = 1,
color = '#000',
background = '#fff',
resolution = window.devicePixelRatio,
} = {};
const TAU = Math.PI * 2;
const ctx = DOM.context2d(s, s, resolution);
ctx.canvas.style.maxWidth = '100%';
ctx.fillStyle = background;
ctx.strokeStyle = color;
ctx.lineWidth = lineWidth;
while(true) {
draw(Date.now() / duration % 1);
yield ctx.canvas;
}
function draw(tGlobal) {
ctx.fillRect(0, 0, s, s);
ctx.beginPath();
for(let i = 1; i <= lines; i++) {
const t2 = i / lines;
for(let j = 0, x, y; j < steps; j++) {
x = s/2, y = s/2;
const t = j / steps;
for(const [_x, _y] of [
rotate(150, t),
rotate(30 + 50 * Math.sin((t + tGlobal) * TAU), t2 + tGlobal * 10/lines),
rotate(5, t * 3 + tGlobal),
rotate(15, t * 5 - tGlobal),
]) x += _x, y += _y;
j ? ctx.lineTo(x, y) : ctx.moveTo(x, y);
}
ctx.closePath();
}
ctx.stroke();
}
function rotate(r, t) {
const a = t * TAU;
return [ r * Math.cos(a), r * Math.sin(a) ];
}
}
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