<!DOCTYPE html>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>for循环+canvas实现黑客帝国矩形阵</title>
<meta name="viewport" content="width=device-width, initial-scale=1, maximum-scale=1, user-scalable=no">
<style type="text/css">
*
{
margin: 0;
padding: 0; /*粗暴的清楚公共样式，正式工作场合不建议使用。你要用，那你开心就好！*/
}
.top
{
background: #2c3c51;
}
.top div
{
padding: 5px 0;
text-align: center;
color: #1291a8;
font-family: "微软雅黑";
}
img
{
120px;
}
@media screen and (max- 640px)
{
.top div
{
padding: 10px;
}
}
</style>
</head>
<body>
<div class="head">
<canvas id="hacker" width="1600" height="720">请使用最新的浏览器</canvas>
</div>
<script type="text/javascript">
/*
*author：chedabang
*/
window.onload = function () {
var hacker = document.getElementById("hacker");
var width = hacker.width = screen.width;
var height = hacker.height = screen.height*0.8;
var ctx = hacker.getContext('2d');
var num = Math.ceil(width / 10);
var y = Array(num).join(0).split('');
var draw = function () {
ctx.fillStyle = 'rgba(0,0,0,.05)';
ctx.fillRect(0, 0, width, height);
ctx.fillStyle = '#0f0';
ctx.font = '10px Microsoft YaHei';
for (i = 0; i < num; i++) {
var x = (i * 10) + 10;
text = String.fromCharCode(65 + Math.random() * 62);
// console.log(text); text文字检测
var y1 = y[i];
ctx.fillText(text, x, y1);
if (y1 > Math.random() * 10 * height) {
y[i] = 0;
} else {
y[i] = parseInt(y[i]) + 10;
}
}
}
Run();
function Run() {
Game_Interval = setInterval(draw, 30);
}
}
</script>
</body>
</html>