想让你的博客有虚线乱飞的效果吗

2017-12-21  本文已影响8人  geeooooz

直接上代码:

<html class="">
<head>
<meta charset="UTF-8">        
</head>
<body>
<script>
!function() {  
   function o(w, v, i) {  
       return w.getAttribute(v) || i  
   }  
   function j(i) {  
       return document.getElementsByTagName(i)  
   }  
   function l() {  
       var i = j("script"),  
       w = i.length,  
       v = i[w - 1];  
       return {  
           l: w,  
           z: o(v, "zIndex", -1),  
           o: o(v, "opacity", 0.5),  
           c: o(v, "color", "0,0,0"),  
           n: o(v, "count", 99)  
       }  
   }  
   function k() {  
       r = u.width = window.innerWidth || document.documentElement.clientWidth || document.body.clientWidth,  
       n = u.height = window.innerHeight || document.documentElement.clientHeight || document.body.clientHeight  
   }  
   function b() {  
       e.clearRect(0, 0, r, n);  
       var w = [f].concat(t);  
       var x, v, A, B, z, y;  
       t.forEach(function(i) {  
           i.x += i.xa,  
           i.y += i.ya,  
           i.xa *= i.x > r || i.x < 0 ? -1 : 1,  
           i.ya *= i.y > n || i.y < 0 ? -1 : 1,  
           e.fillRect(i.x - 0.5, i.y - 0.5, 1, 1);  
           for (v = 0; v < w.length; v++) {  
               x = w[v];  
               if (i !== x && null !== x.x && null !== x.y) {  
                   B = i.x - x.x,  
                   z = i.y - x.y,  
                   y = B * B + z * z;  
                   y < x.max && (x === f && y >= x.max / 2 && (i.x -= 0.03 * B, i.y -= 0.03 * z), A = (x.max - y) / x.max, e.beginPath(), e.lineWidth = A / 2, e.strokeStyle = "rgba(" + s.c + "," + (A + 0.2) + ")", e.moveTo(i.x, i.y), e.lineTo(x.x, x.y), e.stroke())  
               }  
           }  
           w.splice(w.indexOf(i), 1)  
       }),  
       m(b)  
   }  
   var u = document.createElement("canvas"),  
   s = l(),  
   c = "c_n" + s.l,  
   e = u.getContext("2d"),  
   r,  
   n,  
   m = window.requestAnimationFrame || window.webkitRequestAnimationFrame || window.mozRequestAnimationFrame || window.oRequestAnimationFrame || window.msRequestAnimationFrame ||  
   function(i) {  
       window.setTimeout(i, 1000 / 45)  
   },  
   a = Math.random,  
   f = {  
       x: null,  
       y: null,  
       max: 20000  
   };  
   u.id = c;  
   u.style.cssText = "position:fixed;top:0;left:0;z-index:" + s.z + ";opacity:" + s.o;  
   j("body")[0].appendChild(u);  
   k(),  
   window.onresize = k;  
   window.onmousemove = function(i) {  
       i = i || window.event,  
       f.x = i.clientX,  
       f.y = i.clientY  
   },  
   window.onmouseout = function() {  
       f.x = null,  
       f.y = null  
   };  
   for (var t = [], p = 0; s.n > p; p++) {  
       var h = a() * r,  
       g = a() * n,  
       q = 2 * a() - 1,  
       d = 2 * a() - 1;  
       t.push({  
           x: h,  
           y: g,  
           xa: q,  
           ya: d,  
           max: 6000  
       })  
   }  
   setTimeout(function() {  
       b()  
   },  
   100)  
} (); 
</script>
</body>
</html>

效果:


上一篇 下一篇

猜你喜欢

热点阅读