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<!DOCTYPE html>
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<html lang="zh">
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<head>
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<meta charset="UTF-8">
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<meta name="viewport" content="width=device-width, initial-scale=1.0">
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<title>课堂点名系统</title>
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<script src="https://cdn.jsdelivr.net/npm/vue@2"></script>
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<script src="script.js"></script> <!-- 引入你的函数文件 -->
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<style>
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.joinbutton {
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position: absolute; /* 设置为绝对定位 */
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bottom:30%; /* 从顶部移动 */
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left: 50%; /* 从左边移动 */
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border-radius: 15px;
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height: 7%;
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width: 17%;
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font-size: 20px; /* 文本大小 */
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font-weight: bold;
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transform: translate(-50%, -50%);
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}
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body {
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font-family: 'Arial', sans-serif;
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background-color: #f4f4f4;
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margin: 0;
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padding: 20px;
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display: flex;
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flex-direction: column;
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height: 90vh; /* 使 body 高度占满视口 */
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}
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h1 {
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color: #333;
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position: absolute; /* 设置为绝对定位 */
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bottom:60%;
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left: 50%; /* 从左边移动 */
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font-size: 80px;
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font-weight: bold;
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transform: translate(-50%, -50%);
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}
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input[type="text"] {
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padding: 10px;
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border: 2px solid #007BFF;
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border-radius: 20px;
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width: 200px;
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height: 40px; /* 增加高度 */
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font-size: 16px; /* 可选：增加字体大小 */
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transform: translate(-50%, -50%);
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position: absolute; /* 设置为绝对定位 */
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bottom:40%;
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left: 50%; /* 从左边移动 */
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}
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button {
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background-color: #020202;
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color: white;
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border: none;
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padding: 10px 20px;
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border-radius: 5px;
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cursor: pointer;
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margin: 5px;
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transition: background-color 0.3s;
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}
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.modal {
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position: fixed;
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z-index: 1; /* 在最上层 */
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left: 0;
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top: 0;
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width: 100%;
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height: 100%;
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background-color: rgba(0, 0, 0, 0.5); /* 半透明黑色背景 */
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}
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.modal-content {
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background-color: #fff;
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margin: 15% auto;
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padding: 40px;
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border: 1px solid #888;
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width: 15%; /* 可以根据需要调整宽度 */
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}
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.horizontal-line {
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transform: translate(-50%, -50%);
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position: absolute; /* 设置为绝对定位 */
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bottom:60%; /* 从顶部移动 */
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left: 50%; /* 从左边移动 */
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width: 25%; /* 横线宽度 */
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height: 2px; /* 横线高度 */
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background-color: black; /* 横线颜色 */
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border: none; /* 去掉边框 */
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margin: 20px 0; /* 上下外边距 */
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}
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</style>
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</head>
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<body>
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<canvas id="Mycanvas"></canvas>
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<div id="app">
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<h1>课堂点名系统</h1>
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<div class="horizontal-line"></div> <!-- 使用自定义的横线 -->
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<div><input type="text" id="roomNumber" placeholder="请输入房间号..." required></div>
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<div> <button class="joinbutton" @click="tanchuang">加入（创建）房间</button> </div>
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<!-- 模态框 -->
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<div class="modal" v-if="isModalVisible">
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<div class="modal-content">
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<span @click="closeModal" style="cursor:pointer; float:right;">×</span>
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<div>当前房间号没有被创建是否创建房间</div>
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<button @click="goToAboutPage" >确认创建房间</button>
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</div>
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</div>
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<!-- 结束模态框 -->
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</div>
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</div>
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<script>
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new Vue({
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el: '#app',
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data: {
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isModalVisible:false,
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isModalVisible2:false
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},
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methods: {
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goToAboutPage() {
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createroom();
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// const roomNumber = document.getElementById('roomNumber').value;
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// setTimeout(() => {
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// window.location.href = `index.html?number=${roomNumber}`;
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// }, 1000); // 等待1秒
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},
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handleFileUpload(event) {
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// 这里可以添加处理文件上传的逻辑
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},
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tanchuang()
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{
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if(notcreate=true){
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this.isModalVisible = true;
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}
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if(notcreate=false)
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{
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alert('此房间已存在，进入此房间中');
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}
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},
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uploadFile() {
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// 调用外部的 uploadFile 函数
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uploadFile();
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},
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closeModal() {
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this.isModalVisible = false; // 关闭模态框
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}
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}
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});
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</script>
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</body>
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<script>
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// 定义画布宽高和生成点的个数
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var WIDTH = window.innerWidth, HEIGHT = window.innerHeight, POINT = 35;
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var canvas = document.getElementById('Mycanvas');
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canvas.width = WIDTH,
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canvas.height = HEIGHT;
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var context = canvas.getContext('2d');
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context.strokeStyle = 'rgba(0,0,0,0.02)',
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context.strokeWidth = 1,
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context.fillStyle = 'rgba(0,0,0,0.05)';
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var circleArr = [];
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// 线条：开始xy坐标，结束xy坐标，线条透明度
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function Line (x, y, _x, _y, o) {
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this.beginX = x,
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this.beginY = y,
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this.closeX = _x,
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this.closeY = _y,
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this.o = o;
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}
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// 点：圆心xy坐标，半径，每帧移动xy的距离
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function Circle (x, y, r, moveX, moveY) {
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this.x = x,
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this.y = y,
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this.r = r,
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this.moveX = moveX,
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this.moveY = moveY;
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}
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// 生成max和min之间的随机数
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function num (max, _min) {
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var min = arguments[1] || 0;
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return Math.floor(Math.random()*(max-min+1)+min);
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}
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// 绘制原点
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function drawCricle (cxt, x, y, r, moveX, moveY) {
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var circle = new Circle(x, y, r, moveX, moveY)
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cxt.beginPath()
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cxt.arc(circle.x, circle.y, circle.r, 0, 2*Math.PI)
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cxt.closePath()
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cxt.fill();
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return circle;
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}
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// 绘制线条
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function drawLine (cxt, x, y, _x, _y, o) {
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var line = new Line(x, y, _x, _y, o)
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cxt.beginPath()
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cxt.strokeStyle = 'rgba(0,0,0,'+ o +')'
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cxt.moveTo(line.beginX, line.beginY)
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cxt.lineTo(line.closeX, line.closeY)
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cxt.closePath()
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cxt.stroke();
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}
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// 初始化生成原点
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function init () {
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circleArr = [];
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for (var i = 0; i < POINT; i++) {
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circleArr.push(drawCricle(context, num(WIDTH), num(HEIGHT), num(15, 2), num(10, -10)/40, num(10, -10)/40));
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}
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draw();
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}
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// 每帧绘制
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function draw () {
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context.clearRect(0,0,canvas.width, canvas.height);
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for (var i = 0; i < POINT; i++) {
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drawCricle(context, circleArr[i].x, circleArr[i].y, circleArr[i].r);
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}
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for (var i = 0; i < POINT; i++) {
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for (var j = 0; j < POINT; j++) {
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if (i + j < POINT) {
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var A = Math.abs(circleArr[i+j].x - circleArr[i].x),
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B = Math.abs(circleArr[i+j].y - circleArr[i].y);
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var lineLength = Math.sqrt(A*A + B*B);
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var C = 1/lineLength*7-0.009;
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var lineOpacity = C > 0.03 ? 0.03 : C;
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if (lineOpacity > 0) {
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drawLine(context, circleArr[i].x, circleArr[i].y, circleArr[i+j].x, circleArr[i+j].y, lineOpacity);
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}
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}
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}
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}
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}
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// 调用执行
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window.onload = function () {
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init();
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setInterval(function () {
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for (var i = 0; i < POINT; i++) {
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var cir = circleArr[i];
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cir.x += cir.moveX;
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cir.y += cir.moveY;
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if (cir.x > WIDTH) cir.x = 0;
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else if (cir.x < 0) cir.x = WIDTH;
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if (cir.y > HEIGHT) cir.y = 0;
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else if (cir.y < 0) cir.y = HEIGHT;
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}
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draw();
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}, 16);
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}
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</script>
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</html>
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