Canvas Heart

Developer
Ghost Rider
Size
3,161 Kb
Views
38,456
  1. Canvas Heart Previews
  2. Canvas Heart HTML Codes
  3. Canvas Heart CSS Codes
  4. Canvas Heart JS Codes

How do I make an canvas heart?

What is a canvas heart? How do you make a canvas heart? This script and codes were developed by Ghost Rider on 23 July 2022, Saturday.

Canvas Heart Previews
IQ Test

Canvas Heart - Script Codes HTML Codes

<!DOCTYPE html>
<html >
<head> <meta charset="UTF-8"> <title>Canvas Heart</title> <link rel="stylesheet" href="css/style.css">
</head>
<body> <canvas id="heart"></canvas> <script src="js/index.js"></script>
</body>
</html>

Canvas Heart - Script Codes CSS Codes

canvas { position: absolute; left:0; top: 0; width: 100%; height: 100%; background-color: rgba(0,0,0,.2);
}

Canvas Heart - Script Codes JS Codes

window.requestAnimationFrame = window.__requestAnimationFrame || window.requestAnimationFrame || window.webkitRequestAnimationFrame || window.mozRequestAnimationFrame || window.oRequestAnimationFrame || window.msRequestAnimationFrame || (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 || navigator.vendor || window.opera)).toLowerCase()));
var loaded = false;
var init = function () { if (loaded) return; loaded = true; var mobile = window.isDevice; var koef = mobile ? 0.5 : 1; var canvas = document.getElementById('heart'); var ctx = canvas.getContext('2d'); var width = canvas.width = koef * innerWidth; var height = canvas.height = koef * innerHeight; var rand = Math.random; ctx.fillStyle = "rgba(0,0,0,1)"; ctx.fillRect(0, 0, width, height); var heartPosition = function (rad) { //return [Math.sin(rad), Math.cos(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 = koef * innerWidth; height = canvas.height = koef * innerHeight; ctx.fillStyle = "rgba(0,0,0,1)"; 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 = rand() * width; var y = rand() * height; e[i] = { vx: 0, vy: 0, R: 2, speed: rand() + 5, q: ~~(rand() * heartPointsCount), D: 2 * (i % 2) - 1, force: 0.2 * rand() + 0.7, f: "hsla(0," + ~~(40 * rand() + 60) + "%," + ~~(60 * rand() + 20) + "%,.3)", 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) * .5, (1 + n) * .5); time += ((Math.sin(time)) < 0 ? 9 : (n > 0.8) ? .2 : 1) * config.timeDelta; ctx.fillStyle = "rgba(0,0,0,.1)"; 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 < rand()) { u.q = ~~(rand() * heartPointsCount); } else { if (0.99 < rand()) { 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); } } //ctx.fillStyle = "rgba(255,255,255,1)"; //for (i = u.trace.length; i--;) ctx.fillRect(targetPoints[i][0], targetPoints[i][1], 2, 2); window.requestAnimationFrame(loop, canvas); }; loop();
};
var s = document.readyState;
if (s === 'complete' || s === 'loaded' || s === 'interactive') init();
else document.addEventListener('DOMContentLoaded', init, false);
Canvas Heart - Script Codes
Canvas Heart - Script Codes
Home Page Home
Developer Ghost Rider
Username GhostRider
Uploaded July 23, 2022
Rating 3
Size 3,161 Kb
Views 38,456
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