快活林资源网

HTML实现代码雨源码及效果示例
网页制作 2024/12/23 佚名
3 1
快活林资源网 Design By www.csstdc.com

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！

快活林资源网 Design By www.csstdc.com
广告合作：本站广告合作请联系QQ：858582 申请时备注：广告合作（否则不回）
免责声明：本站资源来自互联网收集,仅供用于学习和交流,请遵循相关法律法规,本站一切资源不代表本站立场,如有侵权、后门、不妥请联系本站删除！
快活林资源网 Design By www.csstdc.com
www.csstdc.com 快活林资源网
120,135影音资源
344,641技术资源
22,817软件资源
435,032站长资源

更新日志

友情链接

杰晶网络 DDR爱好者之家 桃源资源网 杰网资源 富贵资源网 南强小屋 铁雪资源网 幽灵资源网 万梅资源网 狼山资源网 白云岛资源网 昆仑资源网 相思资源网 明霞山资源网 内蒙古资源网 黑松山资源网 茶园资源网 饿虎岗资源网 大旗谷资源网 常春岛资源网 岱庙资源网 兴国资源网 快活林资源网 蝙蝠岛资源网 帝王谷资源网 白云城资源网 伏龙阁资源网 清风细雨楼 天枫庄资源网 圆月山庄资源网 无争山庄资源网 神水资源网 移花宫资源网 神剑山庄资源网 无为清净楼资源网 金钱帮资源网 丐帮资源网 华山资源网 极乐门资源网 小李飞刀资源网 凤求凰客栈 风云阁资源网 金狮镖局 鸳鸯亭资源网 千金楼资源网 更多链接
快活林资源网 Design By www.csstdc.com