Web developer and autodidact with an interest in creative coding.
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Contractions 3
canvas = {
const {
size: s = 500,
steps = 500,
lines = 200,
lineWidth = 5,
color = 'rgba(0,0,0,.10)',
background = '#fff',
duration = 2000,
resolution = lowRes ? .5 : window.devicePixelRatio,
} = {};
const TAU = Math.PI * 2;
const ctx = DOM.context2d(s, s, resolution);
ctx.canvas.style.maxWidth = '100%';
ctx.fillStyle = background;
ctx.lineWidth = lineWidth;
ctx.strokeStyle = color;
while(true) {
draw(Date.now() / duration % 1);
yield ctx.canvas;
}
function draw(tGlobal) {
ctx.fillRect(0, 0, s, s);
for(let i = 1; i <= lines; i++) {
const t2 = i / lines;
ctx.beginPath();
for(let j = 0, x, y; j < steps; j++) {
const t = j/steps;
x = s/2, y = s/2;
for(const [_x, _y] of [
rotate(130, t),
rotate(50 + 5 * Math.sin(t*TAU*4) + 25 * Math.sin((t2 - tGlobal) * TAU), t2 + t),
rotate(5, t2 * 2),
rotate(3, -t2),
]) 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 [ Math.cos(a) * r, Math.sin(a) * r ];
}
}
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