/**
 * LODManager.ts
 *
 * Level-of-detail management: distance-based LOD selection,
 * transition blending, hysteresis, and per-object bias config.
 *
 * @module world
 */
export interface LODLevel {
    level: number;
    maxDistance: number;
    meshDetail: number;
}
export interface LODObject {
    id: string;
    position: [number, number, number];
    currentLevel: number;
    levels: LODLevel[];
    bias: number;
    visible: boolean;
    transitionAlpha: number;
}
export interface LODConfig {
    defaultLevels: LODLevel[];
    hysteresis: number;
    transitionSpeed: number;
    maxObjects: number;
}
export declare class LODManager {
    private config;
    private objects;
    private viewerPosition;
    constructor(config?: Partial<LODConfig>);
    register(id: string, position: [number, number, number] | {
        x: number;
        y: number;
        z: number;
    }, levels?: LODLevel[], bias?: number): LODObject;
    unregister(id: string): boolean;
    setViewerPosition(x: number, y: number, z: number): void;
    update(dt: number): void;
    getObject(id: string): LODObject | undefined;
    getObjectCount(): number;
    getLevelDistribution(): Map<number, number>;
    getObjectsAtLevel(level: number): LODObject[];
    getAverageLOD(): number;
}
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