examples/globe-rotate.html

<!doctype html>
<html>
  <head>
    <meta charset="UTF-8" />
    <link href="https://unpkg.com/maplibre-gl@5.0.1/dist/maplibre-gl.css" rel="stylesheet" />
    <script src="https://unpkg.com/maplibre-gl@5.0.1/dist/maplibre-gl.js"></script>
    <style>
      html,
      body {
        margin: 0;
        padding: 0;
        height: 100%;
      }
      #map {
        min-height: 500px;
        height: 100%;
        width: 100%;
        background: #233160;
      }
    </style>
  </head>
  <body>
    <div id="map"></div>
    <script>
      (async () => {
        // Don't forget to replace <YOUR_ACCESS_TOKEN> by your own access token
        const accessToken = "<YOUR_ACCESS_TOKEN>";

        // Get the style then entend it with the globe projection
        const style = await fetch(`https://api.jawg.io/styles/jawg-terrain.json?access-token=${accessToken}`)
          .then((response) => response.json())
          .then((style) => {
            return {
              ...style,
              projection: {
                type: "globe",
              },
            };
          });

        const map = new maplibregl.Map({
          container: "map",
          style: style,
          zoom: 2,
          center: [0, 0],
          maxPitch: 85,
          canvasContextAttributes: { antialias: true },
        });
        // This plugin is used for right to left languages
        maplibregl.setRTLTextPlugin("https://unpkg.com/@mapbox/mapbox-gl-rtl-text@0.2.3/mapbox-gl-rtl-text.min.js");

        let userInteract = false;

        // Stop rotating at zoom level 5 and above
        const maxRotationZoom = 5;
        // Longitude offset of 4° west per second
        const lngOffset = -4;

        function startRotationLoop() {
          // Do not rotate if the map zoom is too high
          if (map.getZoom() > maxRotationZoom) return;
          rotationStep();
          // When the rotation step ends, a "moveend" event will be sent
          map.on("moveend", rotationLoop);
        }

        function stopRotationLoop() {
          // Remove the listener
          map.off("moveend", rotationLoop);
        }

        function rotationLoop(e) {
          // Ignore "moveend" events that don't come from the rotation animation
          if (e.id !== "rotation") return;
          // Stop the loop if the user is interacting with the map
          if (userInteract) return;
          rotationStep();
        }

        function rotationStep() {
          const center = map.getCenter();
          // Compute the destination point
          const destination = { lng: center.lng + lngOffset, lat: center.lat };
          // Pan the map over one second.
          // When this animation is complete, it calls a "moveend" event
          map.panTo(destination, { duration: 1000, easing: (n) => n }, { id: "rotation" });
        }

        // Stop the rotation on user interaction
        ["dblclick", "mousedown", "touchstart"].forEach((event) => {
          map.on(event, () => {
            userInteract = true;
            stopRotationLoop();
          });
        });

        // Handle the special case of "zoomstart"
        // We don't stop the rotation loop as multiple events are sent rapidely
        map.on("zoomstart", (e) => {
          userInteract = true;
        });

        map.on("mouseup", () => {
          userInteract = false;
        });

        // Restart the rotation when the user stops interacting with the map
        ["click", "moveend"].forEach((event) => {
          map.on(event, (e) => {
            // Ignore this event if it doesn't come from the user interaction
            if (e.id === "rotation") return;
            if (!userInteract) startRotationLoop();
          });
        });

        // Start the rotation on page load
        startRotationLoop();
      })();
    </script>
  </body>
</html>