Accueil / npm / three@0.186.1 / examples / jsm / loaders / ColladaLoader.js
ColladaLoader.js
import {
FileLoader,
Loader,
LoaderUtils,
Scene,
TextureLoader
} from 'three';
import { TGALoader } from '../loaders/TGALoader.js';
import { ColladaParser } from './collada/ColladaParser.js';
import { ColladaComposer } from './collada/ColladaComposer.js';
/**
* A loader for the Collada format.
*
* The Collada format is very complex so this loader only supports a subset of what
* is defined in the [official specification](https://www.khronos.org/files/collada_spec_1_5.pdf).
*
* Assets with a Z-UP coordinate system are transformed it into Y-UP by a simple rotation.
* The vertex data are not converted.
*
* ```js
* const loader = new ColladaLoader();
*
* const result = await loader.loadAsync( './models/collada/elf/elf.dae' );
* scene.add( result.scene );
* ```
*
* @augments Loader
* @three_import import { ColladaLoader } from 'three/addons/loaders/ColladaLoader.js';
*/
class ColladaLoader extends Loader {
/**
* Starts loading from the given URL and passes the loaded Collada 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,animations:Array<AnimationClip>,kinematics:Object})} 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 path = ( scope.path === '' ) ? LoaderUtils.extractUrlBase( url ) : scope.path;
const loader = new FileLoader( scope.manager );
loader.setPath( scope.path );
loader.setRequestHeader( scope.requestHeader );
loader.setWithCredentials( scope.withCredentials );
loader.load( url, function ( text ) {
try {
onLoad( scope.parse( text, path ) );
} catch ( e ) {
if ( onError ) {
onError( e );
} else {
console.error( e );
}
scope.manager.itemError( url );
}
}, onProgress, onError );
}
/**
* Parses the given Collada data and returns a result object holding the parsed scene,
* an array of animation clips and kinematics.
*
* @param {string} text - The raw Collada data as a string.
* @param {string} [path] - The asset path.
* @return {?{scene:Group,animations:Array<AnimationClip>,kinematics:Object}} An object representing the parsed asset.
*/
parse( text, path ) {
if ( text.length === 0 ) {
return { scene: new Scene() };
}
// Parse XML to library data
const parser = new ColladaParser();
const parseResult = parser.parse( text );
if ( parseResult === null ) {
return null;
}
const { library, asset, collada } = parseResult;
// Setup texture loaders
const textureLoader = new TextureLoader( this.manager );
textureLoader.setPath( this.resourcePath || path ).setCrossOrigin( this.crossOrigin );
let tgaLoader;
if ( TGALoader ) {
tgaLoader = new TGALoader( this.manager );
tgaLoader.setPath( this.resourcePath || path );
}
// Compose Three.js objects from library data
const composer = new ColladaComposer( library, collada, textureLoader, tgaLoader );
const { scene, animations, kinematics } = composer.compose();
scene.animations = animations;
// Handle coordinate system conversion
if ( asset.upAxis === 'Z_UP' ) {
console.warn( 'THREE.ColladaLoader: You are loading an asset with a Z-UP coordinate system. The loader just rotates the asset to transform it into Y-UP. The vertex data are not converted, see #24289.' );
scene.rotation.set( - Math.PI / 2, 0, 0 );
}
// Apply unit scale
scene.scale.multiplyScalar( asset.unit );
return {
get animations() {
console.warn( 'THREE.ColladaLoader: Please access animations over scene.animations now.' );
return animations;
},
kinematics: kinematics,
library: library,
scene: scene
};
}
}
export { ColladaLoader };