本帖最后由 erwei 于 2018-8-23 15:55 编辑
直接贴代码吧[HTML] 纯文本查看 复制代码 <!DOCTYPE HTML>
<html>
<head>
<meta charset="utf-8" />
<title>文字矩阵</title>
<!-- CSS样式 -->
<style type="text/css">
* {margin: 0; padding: 0;} //无边距
body {background: black;}
canvas {display: block;}
</style>
</head>
<body>
<canvas id="c"></canvas> <!-- 定义画布 -->
<script type="text/javascript">
var c = document.getElementById("c"); //拿到画布并赋值给c
var ctx = c.getContext("2d"); //创建画笔,2d的
c.height = window.innerHeight; //获取屏幕分辨率:高
c.width = window.innerWidth; //宽
var chinese = "社会主义接班人";
chinese = chinese.split(""); //split() 方法用于把一个字符串分割成字符串数组。
var font_size = 10; //字体大小
var columns = Math.floor(c.width/font_size); //屏幕大小除以字体大小=字体个数;向下取整
//an array of drops - one per column
var drops = []; //创建一个数组
for(var x = 0; x < columns; x++)
drops[x] = 1;
//drawing the characters
function draw()
{
ctx.fillStyle = "rgba(0, 0, 0, 0.05)";//rgba:基础三色加不透明度
ctx.fillRect(0, 0, c.width, c.height);
ctx.fillStyle = "#0F0"; //green text
ctx.font = font_size + "px arial";
//looping over drops
for(var i = 0; i < drops.length; i++)
{
var text = chinese[Math.floor(Math.random()*chinese.length)];
ctx.fillText(text, i*font_size, drops[i]*font_size);
if(drops[i]*font_size > c.height && Math.random() > 0.975) //越接近一表示一起下落的可能性越低
drops[i] = 0;
drops[i]++;
}
}
setInterval(draw, 33);//时间间隔
</script>
</body>
</html>
效果图(只会截图了...)
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发表于 2018-8-23 15:48
