Animate a Point

Animate a point in a circle using requestAnimationFrame and setData.

const API_KEY = 'toursprung';

    const center = [11.39085, 47.27574];
    const radius = 0.05;

    const point = {
        type: 'Feature',
        geometry: { type: 'Point', coordinates: [...center] }
    };

    const map = new maptoolkit.Map({
        container: 'map',
        style: `https://static.maptoolkit.net/styles/toursprung/terrain.json?api_key=${API_KEY}`,
        center,
        zoom: 11,
        attributionControl: { compact: false }
    });

    map.addControl(new maptoolkit.NavigationControl(), 'top-right');

    map.on('load', () => {
        map.addSource('point', { type: 'geojson', data: point });

        map.addLayer({
            id: 'point',
            type: 'circle',
            source: 'point',
            paint: { 'circle-radius': 10, 'circle-color': '#ee8a65', 'circle-stroke-width': 2, 'circle-stroke-color': '#fff' }
        });

        function animate(timestamp) {
            const t = (timestamp / 4000) % 1;
            const angle = t * 2 * Math.PI;
            point.geometry.coordinates = [
                center[0] + radius * Math.cos(angle) / Math.cos(center[1] * Math.PI / 180),
                center[1] + radius * Math.sin(angle)
            ];
            map.getSource('point').setData(point);
            requestAnimationFrame(animate);
        }
        requestAnimationFrame(animate);
    });

<!DOCTYPE html>
<html lang="en">
<head>
    <title>Animate a Point – Maptoolkit Maps JS</title>
    <meta property="og:description" content="Animate a point in a circle using requestAnimationFrame and setData." />
    <meta charset="utf-8">
    <meta name="viewport" content="width=device-width, initial-scale=1">
    <script src="https://unpkg.com/@maptoolkit/maps@11.0.0-beta.2/dist/maptoolkit.js"></script>
    <link rel="stylesheet" href="https://unpkg.com/@maptoolkit/maps@11.0.0-beta.2/dist/maptoolkit.css" />
    <style>
        html, body { width: 100%; height: 100%; margin: 0; padding: 0; }
        #map { width: 100%; height: 100%; }
    </style>
</head>
<body>
<div id="map"></div>
<script>
    const API_KEY = 'toursprung';

    const center = [11.39085, 47.27574];
    const radius = 0.05;

    const point = {
        type: 'Feature',
        geometry: { type: 'Point', coordinates: [...center] }
    };

    const map = new maptoolkit.Map({
        container: 'map',
        style: `https://static.maptoolkit.net/styles/toursprung/terrain.json?api_key=${API_KEY}`,
        center,
        zoom: 11,
        attributionControl: { compact: false }
    });

    map.addControl(new maptoolkit.NavigationControl(), 'top-right');

    map.on('load', () => {
        map.addSource('point', { type: 'geojson', data: point });

        map.addLayer({
            id: 'point',
            type: 'circle',
            source: 'point',
            paint: { 'circle-radius': 10, 'circle-color': '#ee8a65', 'circle-stroke-width': 2, 'circle-stroke-color': '#fff' }
        });

        function animate(timestamp) {
            const t = (timestamp / 4000) % 1;
            const angle = t * 2 * Math.PI;
            point.geometry.coordinates = [
                center[0] + radius * Math.cos(angle) / Math.cos(center[1] * Math.PI / 180),
                center[1] + radius * Math.sin(angle)
            ];
            map.getSource('point').setData(point);
            requestAnimationFrame(animate);
        }
        requestAnimationFrame(animate);
    });
</script>
</body>
</html>

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