live - 60fps 1920 x 1080
<!DOCTYPE html>
<html>
<head>
<title>Confetti</title>
<meta name="category" content="Creative">
<style>
body { margin: 0; background-color: #18181b; overflow: hidden; }
canvas { display: block; width: 100vw; height: 100vh; }
</style>
</head>
<body>
<canvas id="c"></canvas>
<script>
const c = document.getElementById("c");
const ctx = c.getContext("2d");
let cH, cW;
const bgColor = "#18181b";
let circles = [];
const colorPicker = (function() {
const colors = ["#C084FC", "#22D3EE", "#A78BFA", "#F472B6"];
let index = 0;
function next() {
index = index < colors.length - 1 ? index + 1 : 0;
return colors[index];
}
return { next };
})();
class Circle {
constructor({ x, y, r, c, v }) {
this.x = x;
this.y = y;
this.r = r;
this.c = c;
this.v = v;
this.alpha = 1;
this.decay = Math.random() * 0.02 + 0.015;
}
draw() {
ctx.globalAlpha = this.alpha;
ctx.beginPath();
ctx.arc(this.x, this.y, this.r, 0, 2 * Math.PI, false);
ctx.fillStyle = this.c;
ctx.fill();
ctx.closePath();
}
update() {
this.x += this.v.x;
this.y += this.v.y;
this.alpha -= this.decay;
if (this.alpha <= this.decay) {
const index = circles.indexOf(this);
if (index > -1) circles.splice(index, 1);
}
}
}
function animateParticules(x, y) {
const circleCount = Math.floor(Math.random() * 20) + 30;
for (let i = 0; i < circleCount; i++) {
const angle = Math.random() * 2 * Math.PI;
const velocity = Math.random() * 6 + 2;
circles.push(new Circle({
x,
y,
r: Math.random() * 4 + 2,
c: colorPicker.next(),
v: {
x: Math.cos(angle) * velocity,
y: Math.sin(angle) * velocity
}
}));
}
}
const mainLoop = () => {
update();
draw();
requestAnimationFrame(mainLoop);
};
const update = () => {
circles.forEach(c => c.update());
};
const draw = () => {
ctx.globalAlpha = 1;
ctx.fillStyle = bgColor;
ctx.fillRect(0, 0, cW, cH);
circles.forEach(c => c.draw());
};
const resizeCanvas = () => {
cW = c.width = window.innerWidth * 2; // Use higher resolution for crispness
cH = c.height = window.innerHeight * 2;
c.style.width = window.innerWidth + 'px';
c.style.height = window.innerHeight + 'px';
ctx.scale(2, 2);
};
function randomClick() {
const randomX = Math.random() * cW / 2;
const randomY = Math.random() * cH / 2;
animateParticules(randomX, randomY);
setTimeout(randomClick, Math.random() * 1500 + 500);
}
window.addEventListener('resize', resizeCanvas);
resizeCanvas();
if (typeof window.isThumbnail !== 'undefined' && window.isThumbnail) {
circles = [];
ctx.fillStyle = bgColor;
ctx.fillRect(0, 0, cW, cH);
animateParticules(cW / 4, cH / 4);
animateParticules(cW / 4 * 3, cH / 4 * 3);
for (let i = 0; i < 20; i++) {
update();
}
draw();
} else {
mainLoop();
randomClick();
}
</script>
</body>
</html>About this animation
Explosive confetti bursts.
Under the hood
Gravity & Friction Simulation
A highly optimized physics engine simulated in Javascript. Each piece of confetti has variables for
velocity, gravity, and terminal velocity. The particles naturally decelerate and drift as they fall, giving a realistic celebratory feel. Related
