首页
所有分类
TAGS
文字工具 EMOJI BIBLE
编程 HTML / CSS

HTML实现代码雨源码及效果示例

Posted in HTML / CSS onFebruary 25, 2020

最近学习了HTML，今天写个HTML代码雨，然后下面用HTML和js也写了一个，给自己留点笔记

先看看效果

1、绿色：

HTML实现代码雨源码及效果示例

2、彩色：

HTML实现代码雨源码及效果示例

3、背景色：

HTML实现代码雨源码及效果示例

4、绿色逐渐变浅：

HTML实现代码雨源码及效果示例

源代码：

<!DOCTYPE html>
<html>
   
<head>   
    <meta http-equiv="Content-Type" content="text/html;charset=utf-8">
    <title>Code -by ZhenYu.Sha</title>
    <style type="text/css">
        html, body {
            width: 100%;
            height: 100%;
        }
        body {
            background: #000;
            overflow: hidden;
            margin: 0;
            padding: 0;
        }
    </style>
</head>
   
<body>  
<canvas id="cvs"></canvas>
<script type="text/javascript">
    var cvs = document.getElementById("cvs");
    var ctx = cvs.getContext("2d");
    var cw = cvs.width = document.body.clientWidth;
    var ch = cvs.height = document.body.clientHeight;
    //动画绘制对象
    var requestAnimationFrame = window.requestAnimationFrame || window.mozRequestAnimationFrame || window.webkitRequestAnimationFrame || window.msRequestAnimationFrame;
    var codeRainArr = []; //代码雨数组
    var cols = parseInt(cw / 14); //代码雨列数
    var step = 16;    //步长，每一列内部数字之间的上下间隔
    ctx.font = "bold 26px microsoft yahei"; //声明字体，个人喜欢微软雅黑
 
    function createColorCv() {
        //画布基本颜色
        ctx.fillStyle = "#242424";
        ctx.fillRect(0, 0, cw, ch);
    }
 
    //创建代码雨
    function createCodeRain() {
        for (var n = 0; n < cols; n++) {
            var col = [];
            //基础位置，为了列与列之间产生错位
            var basePos = parseInt(Math.random() * 300);
            //随机速度 3~13之间
            var speed = parseInt(Math.random() * 10) + 3;
            //每组的x轴位置随机产生
            var colx = parseInt(Math.random() * cw)
 
            //绿色随机
            var rgbr = 0;
            var rgbg = parseInt(Math.random() * 255);
            var rgbb = 0;
            //ctx.fillStyle = "rgb("+r+','+g+','+b+")"
 
            for (var i = 0; i < parseInt(ch / step) / 2; i++) {
                var code = {
                    x: colx,
                    y: -(step * i) - basePos,
                    speed: speed,
                    //  text : parseInt(Math.random()*10)%2 == 0 ? 0 : 1  //随机生成0或者1
                    text: ["a", "b", "c", "d", "e", "f", "g", "h", "i", "j", "k", "l", "m", "n", "o", "p", "q", "s", "t", "u", "v", "w", "x", "y", "z"][parseInt(Math.random() * 11)], //随机生成字母数组中的一个
                    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));
      var id = window.setTimeout(function() {
          callback(currTime + timeToCall);
        },
        timeToCall);
      lastTime = currTime + timeToCall;
      return id;
    };
  if (!window.cancelAnimationFrame)
    window.cancelAnimationFrame = function(id) {
      clearTimeout(id);
    };
}());
// stats
var stats = new Stats();
stats.setMode(0);
stats.domElement.style.position = 'absolute';
stats.domElement.style.left = '0px';
stats.domElement.style.top = '0px';
document.body.appendChild(stats.domElement);
var M = {
  settings: {
    COL_WIDTH: 20,
    COL_HEIGHT: 25,
    VELOCITY_PARAMS: {
      min: 4,
      max: 8
    },
    CODE_LENGTH_PARAMS: {
      min: 20,
      max: 40
    }
  },
  animation: null,
  c: null,
  ctx: null,
  lineC: null,
  ctx2: null,
  WIDTH: window.innerWidth,
  HEIGHT: window.innerHeight,
  COLUMNS: null,
  canvii: [],
  font: '30px matrix-code',
  letters: ['a', 'b', 'c', 'd', 'e', 'f', 'g', 'h', 'i', 'j', 'k', 'l', 'm', 'n', 'o', 'p', 'q', 'r', 's', 't', 'u', 'v', 'w', 'x', 'y', 'z', '0', '1', '2', '3', '4', '5', '6', '7', '8', '9', '$', '+', '-', '*', '/', '=', '%', '"', '\'', '#', '&', '_', '(', ')', ',', '.', ';', ':', '?', '!', '\\', '|', '{', '}', '<', '>', '[', ']', '^', '~'],
  codes: [],
  createCodeLoop: null,
  codesCounter: 0,
  init: function() {
    M.c = document.getElementById('canvas');
    M.ctx = M.c.getContext('2d');
    M.c.width = M.WIDTH;
    M.c.height = M.HEIGHT;
    M.ctx.shadowBlur = 0;
    M.ctx.fillStyle = '#000';
    M.ctx.fillRect(0, 0, M.WIDTH, M.HEIGHT);
    M.ctx.font = M.font;
    M.COLUMNS = Math.ceil(M.WIDTH / M.settings.COL_WIDTH);
    for (var i = 0; i < M.COLUMNS; i++) {
      M.codes[i] = [];
      M.codes[i][0] = {
        'open': true,
        'position': {
          'x': 0,
          'y': 0
        },
        'strength': 0
      };
    }
    M.loop();
    M.createLines();
    M.createCode();
    // not doing this, kills CPU
    // M.swapCharacters();
    window.onresize = function() {
      window.cancelAnimationFrame(M.animation);
      M.animation = null;
      M.ctx.clearRect(0, 0, M.WIDTH, M.HEIGHT);
      M.codesCounter = 0;
      M.ctx2.clearRect(0, 0, M.WIDTH, M.HEIGHT);
      M.WIDTH = window.innerWidth;
      M.HEIGHT = window.innerHeight;
      M.init();
    };
  },
  loop: function() {
    M.animation = requestAnimationFrame(function() {
      M.loop();
    });
    M.draw();
    stats.update();
  },
  draw: function() {
    var velocity, height, x, y, c, ctx;
    // slow fade BG colour
    M.ctx.shadowColor = 'rgba(0, 0, 0, 0.5)';
    M.ctx.fillStyle = 'rgba(0, 0, 0, 0.5)';
    M.ctx.fillRect(0, 0, M.WIDTH, M.HEIGHT);
    M.ctx.globalCompositeOperation = 'source-over';
    for (var i = 0; i < M.COLUMNS; i++) {
      // check member of array isn't undefined at this point
      if (M.codes[i][0].canvas) {
        velocity = M.codes[i][0].velocity;
        height = M.codes[i][0].canvas.height;
        x = M.codes[i][0].position.x;
        y = M.codes[i][0].position.y - height;
        c = M.codes[i][0].canvas;
        ctx = c.getContext('2d');
        M.ctx.drawImage(c, x, y, M.settings.COL_WIDTH, height);
        if ((M.codes[i][0].position.y - height) < M.HEIGHT) {
          M.codes[i][0].position.y += velocity;
        } else {
          M.codes[i][0].position.y = 0;
        }
      }
    }
  },
  createCode: function() {
    if (M.codesCounter > M.COLUMNS) {
      clearTimeout(M.createCodeLoop);
      return;
    }
    var randomInterval = M.randomFromInterval(0, 100);
    var column = M.assignColumn();
    if (column) {
      var codeLength = M.randomFromInterval(M.settings.CODE_LENGTH_PARAMS.min, M.settings.CODE_LENGTH_PARAMS.max);
      var codeVelocity = (Math.random() * (M.settings.VELOCITY_PARAMS.max - M.settings.VELOCITY_PARAMS.min)) + M.settings.VELOCITY_PARAMS.min;
      var lettersLength = M.letters.length;
      M.codes[column][0].position = {
        'x': (column * M.settings.COL_WIDTH),
        'y': 0
      };
      M.codes[column][0].velocity = codeVelocity;
      M.codes[column][0].strength = M.codes[column][0].velocity / M.settings.VELOCITY_PARAMS.max;
      for (var i = 1; i <= codeLength; i++) {
        var newLetter = M.randomFromInterval(0, (lettersLength - 1));
        M.codes[column][i] = M.letters[newLetter];
      }
      M.createCanvii(column);
      M.codesCounter++;
    }
    M.createCodeLoop = setTimeout(M.createCode, randomInterval);
  },
  createCanvii: function(i) {
    var codeLen = M.codes[i].length - 1;
    var canvHeight = codeLen * M.settings.COL_HEIGHT;
    var velocity = M.codes[i][0].velocity;
    var strength = M.codes[i][0].strength;
    var text, fadeStrength;
    var newCanv = document.createElement('canvas');
    var newCtx = newCanv.getContext('2d');
    newCanv.width = M.settings.COL_WIDTH;
    newCanv.height = canvHeight;
    for (var j = 1; j < codeLen; j++) {
      text = M.codes[i][j];
      newCtx.globalCompositeOperation = 'source-over';
      newCtx.font = '30px matrix-code';
      if (j < 5) {
        newCtx.shadowColor = 'hsl(104, 79%, 74%)';
        newCtx.shadowOffsetX = 0;
        newCtx.shadowOffsetY = 0;
        newCtx.shadowBlur = 10;
        newCtx.fillStyle = 'hsla(104, 79%, ' + (100 - (j * 5)) + '%, ' + strength + ')';
      } else if (j > (codeLen - 4)) {
        fadeStrength = j / codeLen;
        fadeStrength = 1 - fadeStrength;
        newCtx.shadowOffsetX = 0;
        newCtx.shadowOffsetY = 0;
        newCtx.shadowBlur = 0;
        newCtx.fillStyle = 'hsla(104, 79%, 74%, ' + (fadeStrength + 0.3) + ')';
      } else {
        newCtx.shadowOffsetX = 0;
        newCtx.shadowOffsetY = 0;
        newCtx.shadowBlur = 0;
        newCtx.fillStyle = 'hsla(104, 79%, 74%, ' + strength + ')';
      }
      newCtx.fillText(text, 0, (canvHeight - (j * M.settings.COL_HEIGHT)));
    }
    M.codes[i][0].canvas = newCanv;
  },
  swapCharacters: function() {
    var randomCodeIndex;
    var randomCode;
    var randomCodeLen;
    var randomCharIndex;
    var newRandomCharIndex;
    var newRandomChar;
    for (var i = 0; i < 20; i++) {
      randomCodeIndex = M.randomFromInterval(0, (M.codes.length - 1));
      randomCode = M.codes[randomCodeIndex];
      randomCodeLen = randomCode.length;
      randomCharIndex = M.randomFromInterval(2, (randomCodeLen - 1));
      newRandomCharIndex = M.randomFromInterval(0, (M.letters.length - 1));
      newRandomChar = M.letters[newRandomCharIndex];
      randomCode[randomCharIndex] = newRandomChar;
    }
    M.swapCharacters();
  },
  createLines: function() {
    M.linesC = document.createElement('canvas');
    M.linesC.width = M.WIDTH;
    M.linesC.height = M.HEIGHT;
    M.linesC.style.position = 'absolute';
    M.linesC.style.top = 0;
    M.linesC.style.left = 0;
    M.linesC.style.zIndex = 10;
    document.body.appendChild(M.linesC);
    var linesYBlack = 0;
    var linesYWhite = 0;
    M.ctx2 = M.linesC.getContext('2d');
    M.ctx2.beginPath();
    M.ctx2.lineWidth = 1;
    M.ctx2.strokeStyle = 'rgba(0, 0, 0, 0.7)';
    while (linesYBlack < M.HEIGHT) {
      M.ctx2.moveTo(0, linesYBlack);
      M.ctx2.lineTo(M.WIDTH, linesYBlack);
      linesYBlack += 5;
    }
    M.ctx2.lineWidth = 0.15;
    M.ctx2.strokeStyle = 'rgba(255, 255, 255, 0.7)';
    while (linesYWhite < M.HEIGHT) {
      M.ctx2.moveTo(0, linesYWhite + 1);
      M.ctx2.lineTo(M.WIDTH, linesYWhite + 1);
      linesYWhite += 5;
    }
    M.ctx2.stroke();
  },
  assignColumn: function() {
    var randomColumn = M.randomFromInterval(0, (M.COLUMNS - 1));
    if (M.codes[randomColumn][0].open) {
      M.codes[randomColumn][0].open = false;
    } else {
      return false;
    }
    return randomColumn;
  },
  randomFromInterval: function(from, to) {
    return Math.floor(Math.random() * (to - from + 1) + from);
  },
  snapshot: function() {
    window.open(M.c.toDataURL());
  }
};
function eventListenerz() {
  var controlToggles = document.getElementsByClassName('toggle-info');
  var controls = document.getElementById('info');
  var snapshotBtn = document.getElementById('snapshot');
  function toggleControls(e) {
    e.preventDefault();
    controls.className = controls.className === 'closed' ? '' : 'closed';
  }
  for (var j = 0; j < 2; j++) {
    controlToggles[j].addEventListener('click', toggleControls, false);
  }
  snapshotBtn.addEventListener('click', M.snapshot, false);
}
window.onload = function() {
  M.init();
  eventListenerz();
};

css代码：

@import url("http://fonts.googleapis.com/css?family=Carrois+Gothic");
@font-face {
  font-family: 'matrix-code';
  src: url('http://neilcarpenter.com/demos/canvas/matrix/font/matrix-code.eot?#iefix') format('embedded-opentype'), url('http://neilcarpenter.com/demos/canvas/matrix/font/matrix-code.woff') format('woff'), url('http://neilcarpenter.com/demos/canvas/matrix/font/matrix-code.ttf') format('truetype'), url('http://neilcarpenter.com/demos/canvas/matrix/font/matrix-code.svg#svgFontName') format('svg');
}
html,
body {
  -webkit-font-smoothing: antialiased;
  font: normal 12px/14px "Carrois Gothic", sans-serif;
  width: 100%;
  height: 100%;
  margin: 0;
  overflow: hidden;
  color: #fff;
  -webkit-user-select: none;
  -moz-user-select: none;
  -ms-user-select: none;
  user-select: none;
}
body {
  background: black;
}
#stats {
  z-index: 100;
}
#info {
  background: rgba(0, 0, 0, 0.7);
  position: fixed;
  bottom: 0;
  left: 0px;
  width: 250px;
  padding: 10px 20px 20px;
  z-index: 100;
  -webkit-transform-origin: bottom center;
  -moz-transform-origin: bottom center;
  -o-transform-origin: bottom center;
  transform-origin: bottom center;
  -webkit-transform: rotate(0deg);
  -moz-transform: rotate(0deg);
  -o-transform: rotate(0deg);
  transform: rotate(0deg);
  -webkit-transition: -webkit-transform .5s ease-in-out;
  -moz-transition: -moz-transform .5s ease-in-out;
  -o-transition: -o-transform .5s ease-in-out;
  transition: transform .5s ease-in-out;
}
#info.closed {
  -webkit-transform: rotate(180deg);
  -moz-transform: rotate(180deg);
  -o-transform: rotate(180deg);
  transform: rotate(180deg);
}
.toggle-info {
  position: absolute;
  display: block;
  height: 10px;
  background: rgba(0, 0, 0, 0.8);
  width: 290px;
  left: 0;
  text-align: center;
  padding: 3px 0 7px;
  text-decoration: none;
  color: white;
  text-shadow: none;
}
.toggle-info:hover {
  background: rgb(0, 0, 0);
}
#close {
  top: -20px;
}
#open {
  bottom: -20px;
  -webkit-transform: rotate(-180deg);
  -moz-transform: rotate(-180deg);
  -o-transform: rotate(-180deg);
  transform: rotate(-180deg);
}
button {
  background: rgba(255, 255, 255, 0.2);
  color: #fff;
  border: 0;
  border-radius: 2px;
  padding: 7px 10px;
  box-shadow: 0 0 3px 0px rgba(255, 255, 255, 0.3);
  cursor: pointer;
}
button:hover {
  background: rgba(255, 255, 255, 0.1);
}
pa {
  color: #fff;
}
pa:hover {
  color: #EFFDEB;
  text-shadow: 0px 0px 5px #75AD61;
}

 到此这篇关于HTML实现代码雨源码及效果示例的文章就介绍到这了,更多相关HTML代码雨内容请搜索三水点靠木以前的文章或继续浏览下面的相关文章，希望大家以后多多支持三水点靠木！

HTML实现代码雨源码及效果示例

- Author -

沙振宇

声明：登载此文出于传递更多信息之目的，并不意味着赞同其观点或证实其描述。

HTML / CSS 相关文章推荐
CSS3 网页下拉菜单代码解释 中文翻译
Feb 27 HTML / CSS
基于html和CSS3制作酷炫的导航栏
Sep 23 HTML / CSS
CSS的background属性及CSS3的背景图片设置总结
Jun 13 HTML / CSS
html+css3实现的登录界面
Dec 09 HTML / CSS
html5调用摄像头功能的实现代码
May 07 HTML / CSS
浅谈three.js中的needsUpdate的应用
Nov 12 HTML / CSS
在HTML5 Canvas中放入图片和保存为图片的方法
May 03 HTML / CSS
Html5实现二维码扫描并解析
Jan 20 HTML / CSS
HTML5在线预览PDF的示例代码
Sep 14 HTML / CSS
Canvas 像素处理之改变透明度的实现代码
Jan 08 HTML / CSS
CSS实现漂亮的时钟动画效果的实例代码
Mar 30 HTML / CSS
HTML5 新增内容和 API详解
Nov 17 HTML / CSS
使用placeholder属性设置input文本框的提示信息
Feb 19 #HTML / CSS
html5实现滑块功能之type=&quot;range&quot;属性
Feb 18 #HTML / CSS
记一次高分屏下canvas模糊问题
Feb 17 #HTML / CSS
使用canvas压缩图片上传的方法示例
Feb 07 #HTML / CSS
div或img图片高度随宽度自适应的方法
Feb 06 #HTML / CSS
HTML5 实现图片上传预处理功能
Feb 06 #HTML / CSS
微信小程序canvas实现水平、垂直居中效果
Feb 05 #HTML / CSS
offset(1) 内存(1) 性能优化(3) 策略(1) limit(1) 逻辑架构(1) 缓存(3) 锁(1) mysql.user(1) 事务(5)
You might like
弹出层之1：JQuery.Boxy (一) 使用介绍
2011/10/06 Javascript
JS事件Event元素(兼容IE,Firefox,Chorme)
2012/11/01 Javascript
window.showModalDialog参数传递中含有特殊字符的处理方法
2013/06/06 Javascript
jquery validate 自定义验证方法介绍 日期验证
2014/02/27 Javascript
如何书写高质量jQuery代码(使用jquery性能问题)
2014/06/30 Javascript
nodeJS代码实现计算交社保是否合适
2015/03/09 NodeJs
深入理解jquery中的事件与动画
2016/05/24 Javascript
Highcharts学习之坐标轴
2016/08/02 Javascript
JS中动态创建元素的三种方法总结(推荐)
2016/10/20 Javascript
JavaScript实现事件的中断传播和行为阻止方法示例
2017/01/20 Javascript
基于rem的移动端响应式适配方案(详解)
2017/07/07 Javascript
JavaScript实现QQ列表展开收缩扩展功能
2017/10/30 Javascript
React数据传递之组件内部通信的方法
2017/12/31 Javascript
微信小程序实现购物车代码实例详解
2019/08/29 Javascript
JS实现放烟花效果
2020/03/10 Javascript
jquery实现两个div中的元素相互拖动的方法分析
2020/04/05 jQuery
移动端JS实现拖拽两种方法解析
2020/10/12 Javascript
node.js如何操作MySQL数据库
2020/10/29 Javascript
对于Python的Django框架部署的一些建议
2015/04/09 Python
python 计算两个日期相差多少个月实例代码
2017/05/24 Python
深入理解Python单元测试unittest的使用示例
2017/11/18 Python
Python实现简单的列表冒泡排序和反转列表操作示例
2019/07/10 Python
使用python写的opencv实时监测和解析二维码和条形码
2019/08/14 Python
python是否适合网页编程详解
2019/10/04 Python
浅析pandas 数据结构中的DataFrame
2019/10/12 Python
如何在scrapy中捕获并处理各种异常
2020/09/28 Python
Python 实现集合Set的示例
2020/12/21 Python
加拿大知名的国际儿童品牌：Hatley
2016/11/09 全球购物
小区门卫工作职责
2013/12/14 职场文书
家长对孩子评语
2014/01/30 职场文书
生产厂长岗位职责
2014/02/21 职场文书
法人代表任命书范本
2014/06/05 职场文书
学校副校长四风对照检查材料整改措施
2014/09/25 职场文书
被委托人身份证明
2015/08/07 职场文书
2016年社区创先争优活动总结
2016/04/05 职场文书
Golang解析JSON对象
2022/04/30 Golang