color: "rgb(" + rgbr + ',' + rgbg + ',' + rgbb + ")"
}
col.push(code);
}
codeRainArr.push(col);
}
}
//代码雨下起来
function codeRaining() {
//把画布擦干净
ctx.clearRect(0, 0, cw, ch);
//创建有颜色的画布
//createColorCv();
for (var n = 0; n < codeRainArr.length; n++) {
//取出列
col = codeRainArr[n];
//遍历列，画出该列的代码
for (var i = 0; i < col.length; i++) {
var code = col[i];
if (code.y > ch) {
//如果超出下边界则重置到顶部
code.y = 0;
} else {
//匀速降落
code.y += code.speed;
}
//1 颜色也随机变化
//ctx.fillStyle = "hsl("+(parseInt(Math.random()*359)+1)+",30%,"+(50-i*2)+"%)";
//2 绿色逐渐变浅
// ctx.fillStyle = "hsl(123,80%,"+(30-i*2)+"%)";
//3 绿色随机
// var r= 0;
// var g= parseInt(Math.random()*255) + 3;
// var b= 0;
// ctx.fillStyle = "rgb("+r+','+g+','+b+")";
//4 一致绿
ctx.fillStyle = code.color;
//把代码画出来
ctx.fillText(code.text, code.x, code.y);
}
}
requestAnimationFrame(codeRaining);
}
//创建代码雨
createCodeRain();
//开始下雨吧 GO>>
requestAnimationFrame(codeRaining);
</script>
</body>
</html>
更多代码雨的文章请参考我的其它文章：
“代码雨”js+css+html实现
HTML代码：
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<link rel="stylesheet" type="text/css" href="css/ok.css">
<title>code by-zhenyu.sha</title>
</head><body>
<canvas id="canvas"></canvas>
</body>
<script src="http://www.jq22.com/jquery/jquery-1.10.2.js"></script>
<script src="http://neilcarpenter.com/demos/canvas/matrix/stats.min.js"></script>
<script type="text/javascript" src="js/ok.js"></script>
</html>
js代码：
(function() {
var lastTime = 0;
var vendors = ['ms', 'moz', 'webkit', 'o'];
for (var x = 0; x < vendors.length && !window.requestAnimationFrame; ++x) {
window.requestAnimationFrame = window[vendors[x] + 'RequestAnimationFrame'];
window.cancelAnimationFrame = window[vendors[x] + 'CancelAnimationFrame'] ||
window[vendors[x] + 'CancelRequestAnimationFrame'];
}
if (!window.requestAnimationFrame)
window.requestAnimationFrame = function(callback, element) {
var currTime = new Date().getTime();
var timeToCall = Math.max(0, 16 - (currTime - lastTime));
