图像序列动画

使用一系列图像源创建动画;
<!DOCTYPE html>
<html lang="en">
<head>
    <title>图像序列动画</title>
    <meta property="og:description" content="使用一系列图像源创建动画" />
    <meta charset='utf-8'>
    <meta name="viewport" content="width=device-width, initial-scale=1">
    <link rel='stylesheet' href='https://unpkg.com/maplibre-gl@5.5.0/dist/maplibre-gl.css' />
    <script src='https://unpkg.com/maplibre-gl@5.5.0/dist/maplibre-gl.js'></script>
    <style>
        body { margin: 0; padding: 0; }
        html, body, #map { height: 100%; }
    </style>
</head>
<body>
<div id="map"></div>
<script>
    const map = new maplibregl.Map({
        container: 'map',
        style:
            'https://demotiles.maplibre.org/styles/osm-bright-gl-style/style.json',
        zoom: 5,
        center: [-75.789, 41.874]
    });

    let frameCount = 5;
    let currentImage = 0;

    function getPath() {
        return (
            `https://maplibre.org/maplibre-gl-js/docs/assets/radar${
                currentImage
            }.gif`
        );
    }

    map.on('load', () => {
        map.addSource('radar', {
            type: 'image',
            url: getPath(),
            coordinates: [
                [-80.425, 46.437],
                [-71.516, 46.437],
                [-71.516, 37.936],
                [-80.425, 37.936]
            ]
        });
        map.addLayer({
            id: 'radar-layer',
            'type': 'raster',
            'source': 'radar',
            'paint': {
                'raster-fade-duration': 0
            }
        });

        setInterval(() => {
            currentImage = (currentImage + 1) % frameCount;
            map.getSource('radar').updateImage({url: getPath()});
        }, 200);
    });
</script>
</body>
</html>