import { LoadingManager, Loader } from 'three';
import { MaterialBuilder } from './types';
/**
 * GLTFWorkerLoader configuration options
 */
export interface GLTFWorkerLoaderOptions {
    /** Whether to enable metadata support (EXT_mesh_features, EXT_structural_metadata) */
    metadata?: boolean;
    /** Custom material builder function */
    materialBuilder?: MaterialBuilder;
}
/**
 * Custom Loader using Worker for GLTF parsing
 */
export declare class GLTFWorkerLoader extends Loader {
    private _metadata;
    private _materialBuilder?;
    private _loaderId;
    private _callbacks;
    private _nextRequestId;
    constructor(manager?: LoadingManager, options?: GLTFWorkerLoaderOptions);
    addListeners(): void;
    removeListeners(): void;
    /**
     * Asynchronously parse GLTF buffer
     */
    parseAsync(buffer: ArrayBuffer, path: string): Promise<any>;
    /**
     * Parse GLTF data using Worker
     */
    private parseWithWorker;
    private _onMessage;
    /**
     * Convert GLTF data returned by Worker to Three.js Scene
     */
    private buildSceneFromGLTFData;
    /**
     * Process and attach metadata to scene and mesh objects
     */
    private processMetadata;
}
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