canvas指纹识别进度动画效果代码-html代码-BFW代码库

canvas指纹识别进度动画效果代码

代码语言：html

所属分类：进度条

代码描述：canvas指纹识别进度动画效果代码

下面为部分代码预览，完整代码请点击下载或在bfwstudio webide中打开

<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <style>
        * {
      margin: 0;
      padding: 0;
    }
    body {
      width: 100vw;
      height: 100vh;
      overflow: hidden;
    }
    .container {
      display: flex;
      width: 100vw;
      height: 100vh;
      align-items: center;
      justify-content: center;
      background: #131418;
    }
    canvas {
      background: #001b30;
    }
    </style>

</head>

<body>
    <!-- partial:index.partial.html -->
    <div class="container">
        <canvas id="canvas"> </canvas>
    </div>
    <!-- partial -->
    <script>
        const { sin, PI } = Math;
    const fullCircle = 2 * PI;
    const canvas = document.getElementById("canvas");
    const range = x => Array(x).fill(0).map((_, index) => index)
    const norm = (val, min, max)=>(val - min) / (max - min)
    const lerp = (nrm, min, max)=>(max - min) * nrm + min
    const lerpMap = (val, sMin, sMax, dMin, dMax)=>lerp(norm(val, sMin, sMax), dMin, dMax)
    const w = 400;
    const h = 250;
    canvas.width = 2 * w;
    canvas.height = 2 * h;
    const ctx = canvas.getContext("2d");
    ctx.translate(w, h);
    
    const rect = ({ color, x, y, w, h }) => {
      ctx.beginPath();
      ctx.fillStyle = color;
      ctx.fillRect(x, y, w, h);
    };
    
    function clear() {
      rect({
        color: "#001b30",
        x: -w,
        y: -h,
        w: 2 * w,
        h: 2 * h
      });
    }
    
    const line = ({ x1, y1, x2, y2 }) => {
      ctx.beginPath();
      ctx.moveTo(x1, y1);
      ctx.lineTo(x2, y2);
      ctx.lineWidth = 4;
      ctx.strokeStyle = "#00ffff";
      ctx.stroke();
      ctx.closePath();
    };
    
    const flashLight = (y, frameWidth) => {
      ctx.save();
      const lightLength = frameWidth * 0.9;
      const hx = 8;
      ctx.beginPath();
      ctx.moveTo(-lightLength, y);
      ctx.quadraticCurveTo(0, y - hx, lightLength, y);
      ctx.quadraticCurveTo(0, y + hx, -lightLength, y);
      ctx.fillStyle = "#00faff";
      ctx.shadowColor = "#00faff";
      ctx.shadowBlur = 20;
      ctx.shadowOffsetX = 0;
      ctx.shadowOffsetY = 0;
      ctx.fill();
      ctx.closePath();
      ctx.restore();
    };
    
    const frameWidth = 100;
    const frameHeight = 120;
    const frameLength = 30;
    let i = -50;
    let multiplier = -1;
    const update = () => {
      clear();
      line({
        x1: frameWidth,
        y1: frameHeight,
        x2: frameWidth - frameLength,
        y2: frameHeight
      });
      line({
        x1: frameWidth,
        y1:.........完整代码请登录后点击上方下载按钮下载查看