mirror of https://github.com/nate2014jatc/AGSTATUS
21 lines
3.2 KiB
JavaScript
21 lines
3.2 KiB
JavaScript
|
(function(){var width,height,largeHeader,canvas,ctx,points,target,animateHeader=true;initHeader();initAnimation();addListeners();function initHeader(){width=window.innerWidth;height=window.innerHeight;target={x:width/2,y:height/2};largeHeader=document.getElementById('large-header');largeHeader.style.height=height+'px';canvas=document.getElementById('demo-canvas');canvas.width=width;canvas.height=height;ctx=canvas.getContext('2d');points=[];for(var x=0;x<width;x=x+width/20){for(var y=0;y<height;y=y+height/20){var px=x+Math.random()*width/20;var py=y+Math.random()*height/20;var p={x:px,originX:px,y:py,originY:py};points.push(p);}}
|
||
|
|
for(var i=0;i<points.length;i++){var closest=[];var p1=points[i];for(var j=0;j<points.length;j++){var p2=points[j]
|
||
|
|
if(!(p1==p2)){var placed=false;for(var k=0;k<5;k++){if(!placed){if(closest[k]==undefined){closest[k]=p2;placed=true;}}}
|
||
|
|
for(var k=0;k<5;k++){if(!placed){if(getDistance(p1,p2)<getDistance(p1,closest[k])){closest[k]=p2;placed=true;}}}}}
|
||
|
|
p1.closest=closest;}
|
||
|
|
for(var i in points){var c=new Circle(points[i],2+Math.random()*2,'rgba(255,255,255,1)');points[i].circle=c;}}
|
||
|
|
function addListeners(){if(!('ontouchstart'in window)){window.addEventListener('mousemove',mouseMove);}
|
||
|
|
window.addEventListener('scroll',scrollCheck);window.addEventListener('resize',resize);}
|
||
|
|
function mouseMove(e){var posx=posy=0;if(e.pageX||e.pageY){posx=e.pageX;posy=e.pageY;}
|
||
|
|
else if(e.clientX||e.clientY){posx=e.clientX+document.body.scrollLeft+document.documentElement.scrollLeft;posy=e.clientY+document.body.scrollTop+document.documentElement.scrollTop;}
|
||
|
|
target.x=posx;target.y=posy;}
|
||
|
|
function scrollCheck(){if(document.body.scrollTop>height)animateHeader=false;else animateHeader=true;}
|
||
|
|
function resize(){width=window.innerWidth;height=window.innerHeight;largeHeader.style.height=height+'px';canvas.width=width;canvas.height=height;}
|
||
|
|
function initAnimation(){animate();for(var i in points){shiftPoint(points[i]);}}
|
||
|
|
function animate(){if(animateHeader){ctx.clearRect(0,0,width,height);for(var i in points){if(Math.abs(getDistance(target,points[i]))<4000){points[i].active=0.3;points[i].circle.active=1;}else if(Math.abs(getDistance(target,points[i]))<20000){points[i].active=0.1;points[i].circle.active=0.6;}else if(Math.abs(getDistance(target,points[i]))<40000){points[i].active=0.02;points[i].circle.active=0.3;}else{points[i].active=0;points[i].circle.active=0.1;}
|
||
|
|
drawLines(points[i]);points[i].circle.draw();}}
|
||
|
|
requestAnimationFrame(animate);}
|
||
|
|
function shiftPoint(p){TweenLite.to(p,1+1*Math.random(),{x:p.originX-50+Math.random()*100,y:p.originY-50+Math.random()*100,ease:Circ.easeInOut,onComplete:function(){shiftPoint(p);}});}
|
||
|
|
function drawLines(p){if(!p.active)return;for(var i in p.closest){ctx.beginPath();ctx.moveTo(p.x,p.y);ctx.lineTo(p.closest[i].x,p.closest[i].y);ctx.strokeStyle='rgba(211,135,0,'+p.active+')';ctx.stroke();}}
|
||
|
|
function Circle(pos,rad,color){var _this=this;(function(){_this.pos=pos||null;_this.radius=rad||null;_this.color=color||null;})();this.draw=function(){if(!_this.active)return;ctx.beginPath();ctx.arc(_this.pos.x,_this.pos.y,_this.radius,0,2*Math.PI,false);ctx.fillStyle='rgba(0,187,196,'+_this.active+')';ctx.fill();};}
|
||
|
|
function getDistance(p1,p2){return Math.pow(p1.x-p2.x,2)+Math.pow(p1.y-p2.y,2);}})();
|