技术支持 郑州做网站东莞关键词优化效果
看腻歪了粒子特效的红心，今天给各位整个线条的，效果图如下：
表白显圣神器，你值得拥有，代码如下：
<!DOCTYPE html>
<html lang="en">
<head><meta charset="UTF-8"><title>Title</title><style>canvas {position: absolute;left:0;top: 0;width: 100%;height: 100%;background-color: rgba(0,0,0,.2);}</style>
</head>
<body>
<canvas id="heart"></canvas>
</body>
<script>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);
</script>
</html>