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Special effects - cobweb background effects

2022-07-24 06:41:00 【Jie_ one thousand nine hundred and ninety-seven】

Cobweb background effect

One . design sketch
Two . Implementation code

One . design sketch

Insert picture description here

Two . Implementation code

<!DOCTYPE html>
<html>

<head>
    <meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
    <title> Cobweb background effect </title>
    <style> * {
       margin: 0; padding: 0; } html {
       background-color: #c3ecff; } </style>
</head>

<body>
</body>

<script> !function () {
       function n(n, e, t) {
       return n.getAttribute(e) || t } function e(n) {
       return document.getElementsByTagName(n) } function t() {
       var t = e("script"), o = t.length, i = t[o - 1]; return {
       l: o, z: n(i, "zIndex", -1), o: n(i, "opacity", .5), c: n(i, "color", "0,0,0"), n: n(i, "count", 99) } } function o() {
       a = m.width = window.innerWidth || document.documentElement.clientWidth || document.body.clientWidth, c = m.height = window.innerHeight || document.documentElement.clientHeight || document.body.clientHeight } function i() {
       r.clearRect(0, 0, a, c); var n, e, t, o, m, l; s.forEach(function (i, x) {
       for (i.x += i.xa, i.y += i.ya, i.xa *= i.x > a || i.x < 0 ? -1 : 1, i.ya *= i.y > c || i.y < 0 ? -1 : 1, r.fillRect(i.x - .5, i.y - .5, 1, 1), e = x + 1; e < u.length; e++) n = u[e], null !== n.x && null !== n.y && (o = i.x - n.x, m = i.y - n.y, l = o * o + m * m, l < n.max && (n === y && l >= n.max / 2 && (i.x -= .03 * o, i.y -= .03 * m), t = (n.max - l) / n.max, r.beginPath(), r.lineWidth = t / 2, r.strokeStyle = "rgba(" + d.c + "," + (t + .2) + ")", r.moveTo(i.x, i.y), r.lineTo(n.x, n.y), r.stroke())) }), x(i) } var a, c, u, m = document.createElement("canvas"), d = t(), l = "c_n" + d.l, r = m.getContext("2d"), x = window.requestAnimationFrame || window.webkitRequestAnimationFrame || window.mozRequestAnimationFrame || window.oRequestAnimationFrame || window.msRequestAnimationFrame || function (n) {
       window.setTimeout(n, 1e3 / 45) }, w = Math.random, y = {
       x: null, y: null, max: 2e4 }; m.id = l, m.style.cssText = "position:fixed;top:0;left:0;z-index:" + d.z + ";opacity:" + d.o, e("body")[0].appendChild(m), o(), window.onresize = o, window.onmousemove = function (n) {
       n = n || window.event, y.x = n.clientX, y.y = n.clientY }, window.onmouseout = function () {
       y.x = null, y.y = null }; for (var s = [], f = 0; d.n > f; f++) {
       var h = w() * a, g = w() * c, v = 2 * w() - 1, p = 2 * w() - 1; s.push({
       x: h, y: g, xa: v, ya: p, max: 6e3 }) } u = s.concat([y]), setTimeout(function () {
       i() }, 100) }(); </script>

</html>