canvas电弧闪电动画效果代码-html代码-BFW代码库

canvas电弧闪电动画效果代码

代码语言：html

所属分类：动画

代码描述：canvas电弧闪电动画效果代码

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>
<head>
    <meta charset="UTF-8">
    <style>
        body,
        html {
            margin: 0;
            padding: 0;
            width: 100%;
            height: 100%;
        }
        body {
            background: linear-gradient(to bottom, #606c88 0%, #3f4c6b 100%);
        }
        canvas {
            border-radius: 200px;
            position: absolute;
            left: 50%;
            margin-left: -250px;
            top: 50%;
            margin-top: -150px;
            box-shadow: 0px 0px 12px black;
            border-top: 1px solid rgba(255, 255, 255, 0.5);
        }
    </style>
</head>

<body>
    <canvas id="canvas" width="500px" height="300px">
</canvas>
    <script>
        (function() {
            var canvas = document.getElementById("canvas");
            var ctx = canvas.getContext("2d");
            var cHeight = canvas.offsetHeight;
            var boltHeight = 130;
        
            function repeatOften() {
                drawLightning();
                requestAnimationFrame(repeatOften);
            };
        
            requestAnimationFrame(repeatOften);
        
            function drawLightning() {
                ctx.clearRect(0, 0, 500, 300);
                var grad = ctx.createLinearGradient(0, 0, 0, 300);
                grad.addColorStop(0, "black");
                grad.addColorStop(0.4, "#00222f");
                grad.addColorStop(0.5, "#008bc0");
                grad.addColorStop(0.6, &.........完整代码请登录后点击上方下载按钮下载查看