Animate map camera around a point

Animate the map camera around a point.


npm install --save @maptiler/sdk

main.js

import { Map, MapStyle, config } from '@maptiler/sdk';
import '@maptiler/sdk/dist/maptiler-sdk.css';

config.apiKey = 'YOUR_MAPTILER_API_KEY_HERE';
const map = new Map({
    container: 'map',
    style: MapStyle.STREETS,
    center: [-87.62712, 41.89033],
    zoom: 15.5,
    pitch: 45
});

function rotateCamera(timestamp) {
    // clamp the rotation between 0 -360 degrees
    // Divide timestamp by 100 to slow rotation to ~10 degrees / sec
    map.rotateTo((timestamp / 100) % 360, { duration: 0 });
    // Request the next frame of the animation.
    requestAnimationFrame(rotateCamera);
}

map.on('load', function () {
    // Start the animation.
    rotateCamera(0);

    // Add 3d buildings and remove label layers to enhance the map
    const layers = map.getStyle().layers;
    for (let i = 0; i < layers.length; i++) {
        if (layers[i].type === 'symbol' && layers[i].layout['text-field']) {
            // remove text labels
            map.removeLayer(layers[i].id);
        }
    }

    map.addLayer({
        'id': '3d-buildings',
        'source': 'composite',
        'source-layer': 'building',
        'filter': ['==', 'extrude', 'true'],
        'type': 'fill-extrusion',
        'minzoom': 15,
        'paint': {
            'fill-extrusion-color': '#aaa',

            // use an 'interpolate' expression to add a smooth transition effect to the
            // buildings as the user zooms in
            'fill-extrusion-height': [
                'interpolate',
                ['linear'],
                ['zoom'],
                15,
                0,
                15.05,
                ['get', 'height']
            ],
            'fill-extrusion-base': [
                'interpolate',
                ['linear'],
                ['zoom'],
                15,
                0,
                15.05,
                ['get', 'min_height']
            ],
            'fill-extrusion-opacity': 0.6
        }
    });
});

index.html

<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta name="robots" content="noindex">
  <title>Animate map camera around a point</title>
  <link rel="stylesheet" href="./style.css">
</head>
<body>
  <div id="map"></div>
  <script type="module" src="./main.js"></script>
</body>
</html>

style.css

body {margin: 0; padding: 0;}
#map {position: absolute; top: 0; bottom: 0; width: 100%;}

<html lang="en">
<head>
<meta charset="UTF-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Animate map camera around a point</title>
<script src="https://cdn.maptiler.com/maptiler-sdk-js/v4.1.0/maptiler-sdk.umd.min.js"></script>
<link href="https://cdn.maptiler.com/maptiler-sdk-js/v4.1.0/maptiler-sdk.css" rel="stylesheet" />
<style>
  body {margin: 0; padding: 0;}
  #map {position: absolute; top: 0; bottom: 0; width: 100%;}
</style>
</head>
<body>
<div id="map"></div>
<script>
    maptilersdk.config.apiKey = 'YOUR_MAPTILER_API_KEY_HERE';
    const map = new maptilersdk.Map({
        container: 'map',
        style: maptilersdk.MapStyle.STREETS,
        center: [-87.62712, 41.89033],
        zoom: 15.5,
        pitch: 45
    });

    function rotateCamera(timestamp) {
        // clamp the rotation between 0 -360 degrees
        // Divide timestamp by 100 to slow rotation to ~10 degrees / sec
        map.rotateTo((timestamp / 100) % 360, { duration: 0 });
        // Request the next frame of the animation.
        requestAnimationFrame(rotateCamera);
    }

    map.on('load', function () {
        // Start the animation.
        rotateCamera(0);

        // Add 3d buildings and remove label layers to enhance the map
        const layers = map.getStyle().layers;
        for (let i = 0; i < layers.length; i++) {
            if (layers[i].type === 'symbol' && layers[i].layout['text-field']) {
                // remove text labels
                map.removeLayer(layers[i].id);
            }
        }

        map.addLayer({
            'id': '3d-buildings',
            'source': 'composite',
            'source-layer': 'building',
            'filter': ['==', 'extrude', 'true'],
            'type': 'fill-extrusion',
            'minzoom': 15,
            'paint': {
                'fill-extrusion-color': '#aaa',

                // use an 'interpolate' expression to add a smooth transition effect to the
                // buildings as the user zooms in
                'fill-extrusion-height': [
                    'interpolate',
                    ['linear'],
                    ['zoom'],
                    15,
                    0,
                    15.05,
                    ['get', 'height']
                ],
                'fill-extrusion-base': [
                    'interpolate',
                    ['linear'],
                    ['zoom'],
                    15,
                    0,
                    15.05,
                    ['get', 'min_height']
                ],
                'fill-extrusion-opacity': 0.6
            }
        });
    });
</script>
</body>
</html>