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/* var canvas = document.getElementById("cas"); var ctx = canvas.getContext("2d"); resize(); window.onresize = resize; function resize() { canvas.width = window.innerWidth || document.documentElement.clientWidth || document.body.clientWidth; canvas.height = (window.innerHeight || document.documentElement.clientHeight || document.body.clientHeight) - 200; } var RAF = function() { return window.requestAnimationFrame || window.webkitRequestAnimationFrame || window.mozRequestAnimationFrame || window.oRequestAnimationFrame || window.msRequestAnimationFrame || function(callback) { window.setTimeout(callback, 1e3 / 60); }; }(); var warea = { x : null, y : null, max : 2e4 }; window.onmousemove = function(e) { e = e || window.event; warea.x = e.clientX; warea.y = e.clientY; }; window.onmouseout = function(e) { warea.x = null; warea.y = null; }; var dots = []; for (var i = 0; i < 300; i++) { var x = Math.random() * canvas.width; var y = Math.random() * canvas.height; var xa = Math.random() * 2 - 1; var ya = Math.random() * 2 - 1; dots.push({ x : x, y : y, xa : xa, ya : ya, max : 6e3 }); } } */