<!doctype html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>cloth</title>
<style>
*{
padding: 0;
margin: 0;
}
body{
background:#000;
}
</style>
</head>
<body>
<div id="container">
<canvas id="c"></canvas>
</div>
<script type="text/javascript" src="http://cdn.gbtags.com/jquery/1.11.1/jquery.min.js"></script>
<script>
var c = document.getElementById("c");
var ctx = c.getContext("2d");
//制作全屏
c.height = window.innerHeight;
c.width = window.innerWidth;
//漢字從Unicode字符集
var chinese = "igeekbar~";
//將字符串轉(zhuǎn)換為一個(gè)數(shù)組中的單個(gè)字符
chinese = chinese.split("");
var font_size = 20;
var columns = c.width/font_size; //雨的列數(shù)
//每列的一個(gè)數(shù)組
var drops = [];
//下面是×坐標(biāo)
//1 = y 在下降（最初是相同的）
for(var x = 0; x < columns; x++)
drops[x] = 1;
//畫(huà)
function draw()
{
//黑BG的帆布
//半透明BG顯示軌跡
ctx.fillStyle = "rgba(0, 0, 0, 0.05)";
ctx.fillRect(0, 0, c.width, c.height);
ctx.fillStyle = "#0F0"; //字體顏色
ctx.font = font_size + "px arial";
//循環(huán)字體
for(var i = 0; i < drops.length; i++)
{
//隨機(jī)漢字打印
var text = chinese[Math.floor(Math.random()*chinese.length)];
//x = i*font_size, y = value of drops[i]*font_size
ctx.fillText(text, i*font_size, drops[i]*font_size);
//在屏幕上劃線(xiàn)后，把它的頂部隨機(jī)發(fā)送到頂部
//將一個(gè)隨機(jī)性添加到復(fù)位中，使分散在軸上的下降
if(drops[i]*font_size > c.height && Math.random() > 0.975)
drops[i] = 0;
//增加的Y坐標(biāo)
drops[i]++;
}
}
setInterval(draw, 33);
</script>
</body>
</html>
