Move Camera Easing

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This example uses TweenJS to smoothly moveCamera in an animation loop.

TypeScript

import { Easing, Tween, update } from "@tweenjs/tween.js";

let map: google.maps.Map;

const cameraOptions: google.maps.CameraOptions = {
  tilt: 0,
  heading: 0,
  zoom: 3,
  center: { lat: 35.6594945, lng: 139.6999859 },
};

const mapOptions = {
  ...cameraOptions,
  mapId: "15431d2b469f209e",
};

function initMap(): void {
  map = new google.maps.Map(
    document.getElementById("map") as HTMLElement,
    mapOptions
  );

  // install Tweenjs with npm i @tweenjs/tween.js
  new Tween(cameraOptions) // Create a new tween that modifies 'cameraOptions'.
    .to({ tilt: 65, heading: 90, zoom: 18 }, 15000) // Move to destination in 15 second.
    .easing(Easing.Quadratic.Out) // Use an easing function to make the animation smooth.
    .onUpdate(() => {
      map.moveCamera(cameraOptions);
    })
    .start(); // Start the tween immediately.

  // Setup the animation loop.
  function animate(time: number) {
    requestAnimationFrame(animate);
    update(time);
  }

  requestAnimationFrame(animate);
}

declare global {
  interface Window {
    initMap: () => void;
  }
}
window.initMap = initMap;

JavaScript

import { Easing, Tween, update } from "@tweenjs/tween.js";
let map;
const cameraOptions = {
  tilt: 0,
  heading: 0,
  zoom: 3,
  center: { lat: 35.6594945, lng: 139.6999859 },
};
const mapOptions = {
  ...cameraOptions,
  mapId: "15431d2b469f209e",
};

function initMap() {
  map = new google.maps.Map(document.getElementById("map"), mapOptions);
  // install Tweenjs with npm i @tweenjs/tween.js
  new Tween(cameraOptions) // Create a new tween that modifies 'cameraOptions'.
    .to({ tilt: 65, heading: 90, zoom: 18 }, 15000) // Move to destination in 15 second.
    .easing(Easing.Quadratic.Out) // Use an easing function to make the animation smooth.
    .onUpdate(() => {
      map.moveCamera(cameraOptions);
    })
    .start(); // Start the tween immediately.

  // Setup the animation loop.
  function animate(time) {
    requestAnimationFrame(animate);
    update(time);
  }

  requestAnimationFrame(animate);
}

window.initMap = initMap;

CSS

/* 
 * Always set the map height explicitly to define the size of the div element
 * that contains the map. 
 */
#map {
  height: 100%;
}

/* 
 * Optional: Makes the sample page fill the window. 
 */
html,
body {
  height: 100%;
  margin: 0;
  padding: 0;
}

HTML

<html>
  <head>
    <title>Move Camera Easing</title>
    <script src="https://polyfill.io/v3/polyfill.min.js?features=default"></script>

    <link rel="stylesheet" type="text/css" href="./style.css" />
    <script type="module" src="./index.js"></script>
  </head>
  <body>
    <div id="map" class="map"></div>

    <!-- 
      The `defer` attribute causes the callback to execute after the full HTML
      document has been parsed. For non-blocking uses, avoiding race conditions,
      and consistent behavior across browsers, consider loading using Promises
      with https://www.npmjs.com/package/@googlemaps/js-api-loader.
      -->
    <script
      src="https://maps.googleapis.com/maps/api/js?key=AIzaSyB41DRUbKWJHPxaFjMAwdrzWzbVKartNGg&callback=initMap&v=beta"
      defer
    ></script>
  </body>
</html>

Try Sample

Clone Sample

Git and Node.js are required to run this sample locally. Follow these instructions to install Node.js and NPM. The following commands clone, install dependencies and start the sample application.

  git clone -b sample-move-camera-ease https://github.com/googlemaps/js-samples.git
  cd js-samples
  npm i
  npm start

Other samples can be tried by switching to any branch beginning with sample-SAMPLE_NAME.

  git checkout sample-SAMPLE_NAME
  npm i
  npm start