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index.js
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index.js
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/**
* @license
* Copyright 2021 Google LLC.
* SPDX-License-Identifier: Apache-2.0
*/
// [START maps_webgl_overlay_simple]
// [START maps_webgl_overlay_simple_init_map]
import {
AmbientLight,
DirectionalLight,
Matrix4,
PerspectiveCamera,
Scene,
WebGLRenderer,
} from "three";
import { GLTFLoader } from "three/examples/jsm/loaders/GLTFLoader";
let map;
const mapOptions = {
tilt: 0,
heading: 0,
zoom: 18,
center: { lat: 35.6594945, lng: 139.6999859 },
mapId: "15431d2b469f209e",
// disable interactions due to animation loop and moveCamera
disableDefaultUI: true,
gestureHandling: "none",
keyboardShortcuts: false,
};
function initMap() {
const mapDiv = document.getElementById("map");
map = new google.maps.Map(mapDiv, mapOptions);
initWebglOverlayView(map);
}
// [END maps_webgl_overlay_simple_init_map]
// [START maps_webgl_overlay_simple_on_add]
function initWebglOverlayView(map) {
let scene, renderer, camera, loader;
const webglOverlayView = new google.maps.WebGLOverlayView();
webglOverlayView.onAdd = () => {
// Set up the scene.
scene = new Scene();
camera = new PerspectiveCamera();
const ambientLight = new AmbientLight(0xffffff, 0.75); // Soft white light.
scene.add(ambientLight);
const directionalLight = new DirectionalLight(0xffffff, 0.25);
directionalLight.position.set(0.5, -1, 0.5);
scene.add(directionalLight);
// Load the model.
loader = new GLTFLoader();
const source =
"https://raw.githubusercontent.com/googlemaps/js-samples/main/assets/pin.gltf";
loader.load(source, (gltf) => {
gltf.scene.scale.set(10, 10, 10);
gltf.scene.rotation.x = Math.PI; // Rotations are in radians.
scene.add(gltf.scene);
});
};
// [END maps_webgl_overlay_simple_on_add]
// [START maps_webgl_overlay_simple_on_context_restored]
webglOverlayView.onContextRestored = ({ gl }) => {
// Create the js renderer, using the
// maps's WebGL rendering context.
renderer = new WebGLRenderer({
canvas: gl.canvas,
context: gl,
...gl.getContextAttributes(),
});
renderer.autoClear = false;
// Wait to move the camera until the 3D model loads.
loader.manager.onLoad = () => {
renderer.setAnimationLoop(() => {
webglOverlayView.requestRedraw();
const { tilt, heading, zoom } = mapOptions;
map.moveCamera({ tilt, heading, zoom });
// Rotate the map 360 degrees.
if (mapOptions.tilt < 67.5) {
mapOptions.tilt += 0.5;
} else if (mapOptions.heading <= 360) {
mapOptions.heading += 0.2;
mapOptions.zoom -= 0.0005;
} else {
renderer.setAnimationLoop(null);
}
});
};
};
// [END maps_webgl_overlay_simple_on_context_restored]
// [START maps_webgl_overlay_simple_on_draw]
webglOverlayView.onDraw = ({ gl, transformer }) => {
const latLngAltitudeLiteral = {
lat: mapOptions.center.lat,
lng: mapOptions.center.lng,
altitude: 100,
};
// Update camera matrix to ensure the model is georeferenced correctly on the map.
const matrix = transformer.fromLatLngAltitude(latLngAltitudeLiteral);
camera.projectionMatrix = new Matrix4().fromArray(matrix);
webglOverlayView.requestRedraw();
renderer.render(scene, camera);
// Sometimes it is necessary to reset the GL state.
renderer.resetState();
};
// [END maps_webgl_overlay_simple_on_draw]
// [START maps_webgl_overlay_simple_add_to_map]
webglOverlayView.setMap(map);
// [END maps_webgl_overlay_simple_add_to_map]
}
window.initMap = initMap;
// [END maps_webgl_overlay_simple]