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Navigate the map with game-like controls

Navigate the map with game-like controls

Click points on a map to create lines that measure distanced using turf.length.

Navigate the map with game-like controls
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<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8" />
<title>Navigate the map with game-like controls</title>
<meta name="viewport" content="initial-scale=1,maximum-scale=1,user-scalable=no" />
<script src="https://cdn.jsdelivr.net/npm/@goongmaps/goong-js@1.0.9/dist/goong-js.js"></script>
<link href="https://cdn.jsdelivr.net/npm/@goongmaps/goong-js@1.0.9/dist/goong-js.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>
    goongjs.accessToken = 'wnicbAmnNkoMHNYUKWnlFHezV189FjmMwkNJ7hKW';
    var map = new goongjs.Map({
        container: 'map',
        style: 'https://tiles.goong.io/assets/goong_map_web.json',
        center: [105.83991, 21.028],
        zoom: 17,
        bearing: -12,
        pitch: 60,
        interactive: false
    });

    // pixels the map pans when the up or down arrow is clicked
    var deltaDistance = 100;

    // degrees the map rotates when the left or right arrow is clicked
    var deltaDegrees = 25;

    function easing(t) {
        return t * (2 - t);
    }

    map.on('load', function () {
        map.getCanvas().focus();

        map.getCanvas().addEventListener(
            'keydown',
            function (e) {
                e.preventDefault();
                if (e.which === 38) {
                    // up
                    map.panBy([0, -deltaDistance], {
                        easing: easing
                    });
                } else if (e.which === 40) {
                    // down
                    map.panBy([0, deltaDistance], {
                        easing: easing
                    });
                } else if (e.which === 37) {
                    // left
                    map.easeTo({
                        bearing: map.getBearing() - deltaDegrees,
                        easing: easing
                    });
                } else if (e.which === 39) {
                    // right
                    map.easeTo({
                        bearing: map.getBearing() + deltaDegrees,
                        easing: easing
                    });
                }
            },
            true
        );
    });
</script>
</body>
</html>