@inweb/viewer-three/dist/extensions/loaders/GLTFFileLoader.module.js

JavaScript library for rendering CAD and BIM files in a browser using Three.js

///////////////////////////////////////////////////////////////////////////////
// Copyright (C) 2002-2025, Open Design Alliance (the "Alliance").
// All rights reserved.
// 
// This software and its documentation and related materials are owned by
// the Alliance. The software may only be incorporated into application
// programs owned by members of the Alliance, subject to a signed
// Membership Agreement and Supplemental Software License Agreement with the
// Alliance. The structure and organization of this software are the valuable
// trade secrets of the Alliance and its suppliers. The software is also
// protected by copyright law and international treaty provisions. Application
// programs incorporating this software must include the following statement
// with their copyright notices:
// 
//   This application incorporates Open Design Alliance software pursuant to a
//   license agreement with Open Design Alliance.
//   Open Design Alliance Copyright (C) 2002-2025 by Open Design Alliance.
//   All rights reserved.
// 
// By use of this software, its documentation or related materials, you
// acknowledge and accept the above terms.
///////////////////////////////////////////////////////////////////////////////

import { GLTFLoader } from 'three/examples/jsm/loaders/GLTFLoader.js';
import { loaders, Loader, GLTFLoadingManager, ModelImpl } from '@inweb/viewer-three';

class GLTFFileLoader extends Loader {
    constructor(viewer) {
        super();
        this.viewer = viewer;
    }
    dispose() {
        if (this.manager)
            this.manager.dispose();
    }
    isSupport(file, format) {
        return ((typeof file === "string" || file instanceof globalThis.File || file instanceof ArrayBuffer) &&
            /(gltf|glb)$/i.test(format));
    }
    async load(file, format, params = {}) {
        this.manager = new GLTFLoadingManager(file, params);
        const loader = new GLTFLoader(this.manager);
        loader.setPath(this.manager.path);
        loader.setCrossOrigin(params.crossOrigin || loader.crossOrigin);
        loader.setRequestHeader(params.requestHeader || {});
        loader.setWithCredentials(params.withCredentials || loader.withCredentials);
        const progress = (event) => {
            const { lengthComputable, loaded, total } = event;
            const progress = lengthComputable ? loaded / total : 1;
            this.viewer.emitEvent({ type: "geometryprogress", data: progress, file });
        };
        const gltf = await loader.loadAsync(this.manager.fileURL, progress);
        if (!this.viewer.scene)
            return this;
        let handle = 1;
        gltf.scene.traverse((object) => {
            object.userData = { handle: handle + "", ...object.userData };
            handle++;
        });
        const modelImpl = new ModelImpl(gltf.scene);
        modelImpl.id = params.modelId || this.extractFileName(file);
        this.viewer.scene.add(gltf.scene);
        this.viewer.models.push(modelImpl);
        this.viewer.syncOptions();
        this.viewer.syncOverlay();
        this.viewer.emitEvent({ type: "databasechunk", data: gltf.scene, file });
        this.viewer.update(true);
        return this;
    }
}
loaders.registerLoader("gltf-file", (viewer) => new GLTFFileLoader(viewer));

export { GLTFFileLoader };
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