import type { Vector3 } from '@holoscript/core';
/**
 * OcclusionCulling.ts
 *
 * Visibility determination: frustum culling, AABB tests,
 * portal-based occlusion, and query batching.
 *
 * @module world
 */
export interface AABB {
    min: Vector3;
    max: Vector3;
}
export interface FrustumPlane {
    normal: Vector3;
    distance: number;
}
export interface CullableObject {
    id: string;
    bounds: AABB;
    visible: boolean;
    lastTestFrame: number;
    layer: number;
}
export interface OcclusionPortal {
    id: string;
    bounds: AABB;
    connectedZones: [string, string];
    open: boolean;
}
export interface OcclusionZone {
    id: string;
    bounds: AABB;
    objects: string[];
}
export declare class OcclusionCulling {
    private objects;
    private zones;
    private portals;
    private frustumPlanes;
    private currentFrame;
    private visibleCount;
    private culledCount;
    private layerMask;
    register(id: string, bounds: AABB, layer?: number): CullableObject;
    unregister(id: string): boolean;
    updateBounds(id: string, bounds: AABB): void;
    addZone(id: string, bounds: AABB, objectIds?: string[]): void;
    addPortal(id: string, bounds: AABB, zone1: string, zone2: string): void;
    setPortalOpen(id: string, open: boolean): void;
    setFrustum(planes: FrustumPlane[]): void;
    setLayerMask(mask: number): void;
    performCulling(): void;
    private isInFrustum;
    testAABBOverlap(a: AABB, b: AABB): boolean;
    queryRegion(region: AABB): CullableObject[];
    getVisibleZones(startZone: string): string[];
    getVisibleObjects(): CullableObject[];
    getVisibleCount(): number;
    getCulledCount(): number;
    getTotalCount(): number;
    getCullRatio(): number;
    getCurrentFrame(): number;
}
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