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ALWAYS HENGHENG888 1#@!#!123s

: / var / www / sumontech.com / assets / js /

Filename : canvas.min.js

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!function(){var n,t,e,i,a,o,d=!0;function r(){d=!(document.body.scrollTop>t)}function h(){n=window.innerWidth,t=window.innerHeight,e.style.height=t+"px",i.width=n,i.height=t}function l(){if(d){a.clearRect(0,0,n,t);for(var e in o)o[e].draw()}requestAnimationFrame(l)}function c(){var e=this;function i(){e.pos.x=Math.random()*n,e.pos.y=t+100*Math.random(),e.alpha=.1+.3*Math.random(),e.scale=.1+.3*Math.random(),e.velocity=Math.random()}e.pos={},i(),this.draw=function(){e.alpha<=0&&i(),e.pos.y-=e.velocity,e.alpha-=5e-4,a.beginPath(),a.arc(e.pos.x,e.pos.y,10*e.scale,0,2*Math.PI,!1),a.fillStyle="rgba(255,255,255,"+e.alpha+")",a.fill()}}!function(){n=window.innerWidth,t=window.innerHeight,{x:0,y:t},(e=document.getElementById("large-header")).style.height=t+"px",(i=document.getElementById("demo-canvas")).width=n,i.height=t,a=i.getContext("2d"),o=[];for(var d=0;d<.5*n;d++){var r=new c;o.push(r)}l()}(),window.addEventListener("scroll",r),window.addEventListener("resize",h)}();