import { WebGLRenderer, Scene, Camera, Mesh } from 'three';
import { NEEDLE_progressive_mesh_model } from '../extension.js';
/**
 * This interface is used to define a plugin for the progressive extension. It can be registered using the `registerPlugin` function.
 */
export interface NEEDLE_progressive_plugin {
    /** Called before the LOD level will be requested/updated for a object */
    onBeforeUpdateLOD?(renderer: WebGLRenderer, scene: Scene, camera: Camera, object: Mesh): void;
    /** Called after the LOD level has been requested */
    onAfterUpdatedLOD?(renderer: WebGLRenderer, scene: Scene, camera: Camera, object: Mesh, level: {
        mesh_lod: number;
        texture_lod: number;
    }): void;
    /** Called when a new mesh is registered */
    onRegisteredNewMesh?(mesh: Mesh, ext: NEEDLE_progressive_mesh_model): void;
    /** Called before the LOD mesh is fetched */
    onBeforeGetLODMesh?(mesh: Mesh, level: number): void;
}
/**
 * List of registered plugins for the progressive extension. Please use the `registerPlugin` function to add a plugin.
 * @internal
 */
export declare const plugins: NEEDLE_progressive_plugin[];