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Move Camera Easing

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Page Summary

This example demonstrates how to smoothly animate camera movement on a Google Map using Tween.js and moveCamera.
The animation adjusts the camera's tilt, heading, and zoom level over a 15-second duration with a quadratic easing function for a smooth transition.
The code utilizes an animation loop with requestAnimationFrame and Tween.js's update function to continuously update the camera position.
The sample provides both TypeScript and JavaScript code snippets for implementation.
To run the sample locally, you need Git and Node.js installed, and then follow the provided instructions to clone, install dependencies, and start the application.

This example uses tween.js to smoothly moveCamera in an animation loop.

[フレーム]

TypeScript

import{Easing,Tween,update}from"@tweenjs/tween.js";
letmap:google.maps.Map;
constcameraOptions:google.maps.CameraOptions={
tilt:0,
heading:0,
zoom:3,
center:{lat:35.6594945,lng:139.6999859},
};
constmapOptions={
...cameraOptions,
mapId:"15431d2b469f209e",
};
functioninitMap():void{
map=newgoogle.maps.Map(
document.getElementById("map")asHTMLElement,
mapOptions
);
// install Tweenjs with npm i @tweenjs/tween.js
newTween(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.
functionanimate(time:number){
requestAnimationFrame(animate);
update(time);
}
requestAnimationFrame(animate);
}
declareglobal{
interfaceWindow{
initMap:()=>void;
}
}
window.initMap=initMap;index.ts

JavaScript

import{Easing,Tween,update}from"@tweenjs/tween.js";
letmap;
constcameraOptions={
tilt:0,
heading:0,
zoom:3,
center:{lat:35.6594945,lng:139.6999859},
};
constmapOptions={
...cameraOptions,
mapId:"15431d2b469f209e",
};
functioninitMap(){
map=newgoogle.maps.Map(document.getElementById("map"),mapOptions);
// install Tweenjs with npm i @tweenjs/tween.js
newTween(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.
functionanimate(time){
requestAnimationFrame(animate);
update(time);
}
requestAnimationFrame(animate);
}
window.initMap=initMap;index.js

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;
}
style.css

HTML

<html>
 <head>
 <title>Move Camera Easing</title>
 <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 script 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. See
 https://developers.google.com/maps/documentation/javascript/load-maps-js-api
 for more information.
 -->
 <script
 src="https://maps.googleapis.com/maps/api/js?key=AIzaSyB41DRUbKWJHPxaFjMAwdrzWzbVKartNGg&callback=initMap&v=weekly"
 defer
 ></script>
 </body>
</html>index.html

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.

gitclone-bsample-move-camera-easehttps://github.com/googlemaps/js-samples.git
cdjs-samples
npmi
npmstart

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

gitcheckoutsample-SAMPLE_NAME
npmi
npmstart