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发表于 2021-2-6 06:57:40
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显示全部楼层
在body插入- <div style = "display:none;">动态线条</div>
- <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>
- <div style = "display:none;"> 动态线条end</div>
复制代码 |
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