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The content on this website, including videos and code examples, is for educational purposes only. All demonstrations and designs are fictional and created to illustrate coding techniques. Any resemblance to existing websites or brands is purely coincidental.
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Below is the html code for this video.
index.html
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Chaotic Lines Heart ❤️</title>
<link rel="stylesheet" href="style.css">
</head>
<body>
<canvas id="chaotic-lines-heart"></canvas>
<script src="index.js"></script>
</body>
</html>Below is the css code for this video.
style.css
* {
margin: 0;
padding: 0;
}
body {
height: 100vh;
width: 100%;
background-color: #000000;
overflow: hidden;
}
canvas {
position: absolute;
top: 0;
left: 0;
height: 100%;
width: 100%;
}Below is the javascript code for this video.
index.js
window.requestAnimationFrame = window.requestAnimationFrame || (function () {
return function (callback, element) {
var lastTime = element.__lastTime;
if (lastTime === undefined) lastTime = 0;
var currTime = Date.now();
var timeToCall = Math.max(1, 33 - (currTime - lastTime));
window.setTimeout(callback, timeToCall);
element.__lastTime = currTime + timeToCall;
};
})();
window.isDevice = /android|webos|iphone|ipad|ipod|blackberry|iemobile|opera mini/i.test((navigator.userAgent || window.opera).toLowerCase());
var loaded = false;
var init = function () {
if (loaded) return;
loaded = true;
var mobile = window.isDevice;
var userDevice = mobile ? 0.5 : 1;
var canvas = document.getElementById("chaotic-lines-heart");
var ctx = canvas.getContext("2d");
var width = (canvas.width = userDevice * innerWidth);
var height = (canvas.height = userDevice * innerHeight);
var ran = Math.random;
ctx.fillStyle = "#000000";
ctx.fillRect(0, 0, width, height);
var heartPosition = function (rad) {
return [Math.pow(Math.sin(rad), 3), -(15 * Math.cos(rad) - 5 * Math.cos(2 * rad) - 2 * Math.cos(3 * rad) - Math.cos(4 * rad))];
};
var scaleAndTranslate = function (pos, sx, sy, dx, dy) { return [dx + pos[0] * sx, dy + pos[1] * sy]; };
window.addEventListener("resize", function () {
width = canvas.width = userDevice * innerWidth;
height = canvas.height = userDevice * innerHeight;
ctx.fillStyle = "#000000";
ctx.fillRect(0, 0, width, height);
});
var traceCount = mobile ? 20 : 50;
var pointsOrigin = [];
var i;
var dr = mobile ? 0.3 : 0.1;
for (i = 0; i < Math.PI * 2; i += dr) pointsOrigin.push(scaleAndTranslate(heartPosition(i), 210, 13, 0, 0));
for (i = 0; i < Math.PI * 2; i += dr) pointsOrigin.push(scaleAndTranslate(heartPosition(i), 150, 9, 0, 0));
for (i = 0; i < Math.PI * 2; i += dr) pointsOrigin.push(scaleAndTranslate(heartPosition(i), 90, 5, 0, 0));
var heartPointsCount = pointsOrigin.length;
var targetPoints = [];
var pulse = function (kx, ky) {
for (i = 0; i < pointsOrigin.length; i++) {
targetPoints[i] = [];
targetPoints[i][0] = kx * pointsOrigin[i][0] + width / 2;
targetPoints[i][1] = ky * pointsOrigin[i][1] + height / 2;
}
};
var e = [];
for (i = 0; i < heartPointsCount; i++) {
var x = ran() * width;
var y = ran() * height;
e[i] = {
vx: 0, vy: 0, R: 2, speed: ran() + 5, q: ~~(ran() * heartPointsCount), D: 2 * (i % 2) - 1, force: 0.25 * ran() + 0.75,
f: "hsla(0, " + ~~(40 * ran() + 60) + "%, " + ~~(60 * ran() + 20) + "%, 0.5)", trace: []
};
for (var k = 0; k < traceCount; k++) e[i].trace[k] = { x: x, y: y };
}
var config = { traceK: 0.4, timeDelta: 0.01 };
var time = 0;
var loop = function () {
var n = -Math.cos(time);
pulse((1 + n) * 0.5, (1 + n) * 0.5);
time += (Math.sin(time) < 0 ? 9 : n > 0.75 ? 0.25 : 1) * config.timeDelta;
ctx.fillStyle = "#0000001a";
ctx.fillRect(0, 0, width, height);
for (i = e.length; i--;) {
var u = e[i];
var q = targetPoints[u.q];
var dx = u.trace[0].x - q[0];
var dy = u.trace[0].y - q[1];
var length = Math.sqrt(dx * dx + dy * dy);
if (10 > length) {
if (0.95 < ran()) { u.q = ~~(ran() * heartPointsCount); } else {
if (0.99 < ran()) u.D *= -1;
u.q += u.D;
u.q %= heartPointsCount;
if (0 > u.q) u.q += heartPointsCount;
}
}
u.vx += (-dx / length) * u.speed;
u.vy += (-dy / length) * u.speed;
u.trace[0].x += u.vx;
u.trace[0].y += u.vy;
u.vx *= u.force;
u.vy *= u.force;
for (k = 0; k < u.trace.length - 1;) {
var T = u.trace[k];
var N = u.trace[++k];
N.x -= config.traceK * (N.x - T.x);
N.y -= config.traceK * (N.y - T.y);
}
ctx.fillStyle = u.f;
for (k = 0; k < u.trace.length; k++) ctx.fillRect(u.trace[k].x, u.trace[k].y, 1, 1);
}
window.requestAnimationFrame(loop, canvas);
};
loop();
};
var s = document.readyState;
if (s === "complete" || s === "loaded" || s === "interactive") init();
else document.addEventListener("DOMContentLoaded", init, false);Thanks for visiting