Accueil / npm / three@0.186.1 / examples / jsm / loaders / KMZLoader.js
KMZLoader.js
import {
FileLoader,
Group,
Loader,
LoadingManager
} from 'three';
import { ColladaLoader } from '../loaders/ColladaLoader.js';
import { unzipSync } from '../libs/fflate.module.js';
/**
* A loader for the KMZ format.
*
* ```js
* const loader = new KMZLoader();
* const kmz = await loader.loadAsync( './models/kmz/Box.kmz' );
*
* scene.add( kmz.scene );
* ```
*
* @augments Loader
* @three_import import { KMZLoader } from 'three/addons/loaders/KMZLoader.js';
*/
class KMZLoader extends Loader {
/**
* Constructs a new KMZ loader.
*
* @param {LoadingManager} [manager] - The loading manager.
*/
constructor( manager ) {
super( manager );
}
/**
* Starts loading from the given URL and passes the loaded KMZ asset
* to the `onLoad()` callback.
*
* @param {string} url - The path/URL of the file to be loaded. This can also be a data URI.
* @param {function({scene:Group})} onLoad - Executed when the loading process has been finished.
* @param {onProgressCallback} onProgress - Executed while the loading is in progress.
* @param {onErrorCallback} onError - Executed when errors occur.
*/
load( url, onLoad, onProgress, onError ) {
const scope = this;
const loader = new FileLoader( scope.manager );
loader.setPath( scope.path );
loader.setResponseType( 'arraybuffer' );
loader.setRequestHeader( scope.requestHeader );
loader.setWithCredentials( scope.withCredentials );
loader.load( url, function ( text ) {
try {
onLoad( scope.parse( text ) );
} catch ( e ) {
if ( onError ) {
onError( e );
} else {
console.error( e );
}
scope.manager.itemError( url );
}
}, onProgress, onError );
}
/**
* Parses the given KMZ data and returns an object holding the scene.
*
* @param {ArrayBuffer} data - The raw KMZ data as an array buffer.
* @return {{scene:Group}} The parsed KMZ asset.
*/
parse( data ) {
function findFile( url ) {
for ( const path in zip ) {
if ( path.slice( - url.length ) === url ) {
return zip[ path ];
}
}
}
const manager = new LoadingManager();
manager.setURLModifier( function ( url ) {
const image = findFile( url );
if ( image ) {
console.log( 'Loading', url );
const blob = new Blob( [ image.buffer ], { type: 'application/octet-stream' } );
return URL.createObjectURL( blob );
}
return url;
} );
//
const zip = unzipSync( new Uint8Array( data ) );
if ( zip[ 'doc.kml' ] ) {
const xml = new DOMParser().parseFromString( new TextDecoder().decode( zip[ 'doc.kml' ] ), 'application/xml' );
const model = xml.querySelector( 'Placemark Model Link href' );
if ( model ) {
const loader = new ColladaLoader( manager );
return loader.parse( new TextDecoder().decode( zip[ model.textContent ] ) );
}
} else {
console.warn( 'KMZLoader: Missing doc.kml file.' );
for ( const path in zip ) {
const extension = path.split( '.' ).pop().toLowerCase();
if ( extension === 'dae' ) {
const loader = new ColladaLoader( manager );
return loader.parse( new TextDecoder().decode( zip[ path ] ) );
}
}
}
console.error( 'KMZLoader: Couldn\'t find .dae file.' );
return { scene: new Group() };
}
}
export { KMZLoader };