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网页动态背景??随鼠标变换的动态线条

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先上一张效果图。


代码如下:



  


1 /**
2 * Copyright (c) 2016 hustcc
3 * License: MIT
4 * Version: v1.0.1
5 * GitHub: https://github.com/hustcc/canvas-nest.js
6 **/
7 !
8 function() {
9 function n(n, e, t) {
10 return n.getAttribute(e) || t
11 }
12 function e(n) {
13 return document.getElementsByTagName(n)
14 }
15 function t() {
16 var t = e("script"),
17 o = t.length,
18 i = t[o - 1];
19 return {
20 l: o,
21 z: n(i, "zIndex", -1),
22 o: n(i, "opacity", .5),
23 c: n(i, "color", "0,0,0"),
24 n: n(i, "count", 99)
25 }
26 }
27 function o() {
28 a = m.width = window.innerWidth || document.documentElement.clientWidth || document.body.clientWidth,
29 c = m.height = window.innerHeight || document.documentElement.clientHeight || document.body.clientHeight
30 }
31 function i() {
32 r.clearRect(0, 0, a, c);
33 var n, e, t, o, m, l;
34 s.forEach(function(i, x) {
35 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],
36 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()))
37 }),
38 x(i)
39 }
40 var a, c, u, m = document.createElement("canvas"),
41 d = t(),
42 l = "c_n" + d.l,
43 r = m.getContext("2d"),
44 x = window.requestAnimationFrame || window.webkitRequestAnimationFrame || window.mozRequestAnimationFrame || window.oRequestAnimationFrame || window.msRequestAnimationFrame ||
45 function(n) {
46 window.setTimeout(n, 1e3 / 45)
47 },
48 w = Math.random,
49 y = {
50 x: null,
51 y: null,
52 max: 2e4
53 };
54 m.id = l,
55 m.style.cssText = "position:fixed;top:0;left:0;z-index:" + d.z + ";opacity:" + d.o,
56 e("body")[0].appendChild(m),
57 o(),
58 window.onresize = o,
59 window.onmousemove = function(n) {
60 n = n || window.event,
61 y.x = n.clientX,
62 y.y = n.clientY
63 },
64 window.onmouseout = function() {
65 y.x = null,
66 y.y = null
67 };
68 for (var s = [], f = 0; d.n > f; f++) {
69 var h = w() * a,
70 g = w() * c,
71 v = 2 * w() - 1,
72 p = 2 * w() - 1;
73 s.push({
74 x: h,
75 y: g,
76 xa: v,
77 ya: p,
78 max: 6e3
79 })
80 }
81 u = s.concat([y]),
82 setTimeout(function() {
83 i()
84 },
85 100)
86 } ();

第一是直接引入方式,第二可以直接拷贝到JS文件里面。


作者的GitHub地址是https://github.com/hustcc/canvas-nest.js



转载于:https://www.cnblogs.com/qq597585136/p/7019755.html






相关资源:一个好用的线条跟随鼠标移动的canvas效果


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